From 4fe1131e55cc5bef1e33afbb55cd8ac9bac33d43 Mon Sep 17 00:00:00 2001
From: garnet420 <795869+garnet420@users.noreply.github.com>
Date: Sat, 29 Jun 2019 23:04:57 -0400
Subject: [PATCH] G420 automator work (#616)

* WIP automator backend

* backend is now capable of running a really tiny test program

* Automator WIP

* Make nested things in AutomatorBackend lower case

* For now, translate strings to Decimals in stored scripts as possible

* change "currency" to "comparable" in automator backend

* rebase razen's automator work onto current master, fix rebase errors

* block automator code that doesn't even work

* update vue-draggable version

* update index.html for new vue draggable

* trying to get draggable to work

* update sortable.min.js

* more block automator work

* plenty of more functionality like nesting and deleting rows

* add while

* text parse from blocks

* parse blocks into automator and delete nested commands

* scratch file with grammar

* scratch file with grammar

* Automator grammar with CST visitor that reports some semantic errors

* add in codemirror css and js

* checkpoint of automator work so far

* automator state of affairs

* refactor big crunch code a bit

* automator work checkpoint

* small fixes to non-automato stuff

* script storage in player sketched out

* update to loading scripts from save

* Nuke old code

* include font awesome stylesheet

* Add GAME_LOAD event

* automato can now run a simple script (triggered from console at the moment)

* Added automato controls

* add repeat support to automato

* a little more work on automato buttons

* refactor code for getting current EC completions a bit to support automato

* automato working well enough to run an automated reality script

* Beautify automator UI

* fix issue with numeric vars in automato; remove some console logs

* fix auto eternity and script looping logic in automato

* fix pause with variable-defined time and plain pause command

* add support for black hole and stored time on/off in automato

* crude support for renaming scripts

* hide rename icon when renaming

* support creating and opening scripts in automato

* new tomato tutorials

* add store time use to automator

* add more automato command docs

* add working tooltips for automato buttons

* indicate which script is running in dropdown menu

* remove more old automator cruft

* remove console printouts

* fix active button colors in automato

* indicate active automato line in gutter
---
 .eslintrc.json                                |    1 +
 index.html                                    |  251 +-
 javascripts/components/automator-buttons.js   |   10 +-
 .../header/game-header-big-crunch-button.js   |    2 +-
 .../header/game-header-eternity-button.js     |   36 +-
 javascripts/components/new-ui.js              |    2 +-
 .../new-ui/sidebar-resources/sidebar-ip.js    |    2 +-
 .../automator/automator-block-editor.js       |   69 +
 .../reality/automator/automator-block-tab.js  |   25 +
 .../reality/automator/automator-blocks.js     |   89 +
 .../reality/automator/automator-button.js     |    7 +
 .../reality/automator/automator-editor.js     |  256 +
 .../automator/automator-single-block.js       |   53 +
 .../reality/automator/automator-tab.js        |   23 +
 .../docs/automator-docs-main-page.js          |   17 +
 .../reality/automator/docs/automator-docs.js  |   49 +
 .../automator/docs/automator-man-page.js      |   32 +
 javascripts/core/app/ui.init.js               |    6 +
 javascripts/core/autobuyer.js                 |    4 +-
 javascripts/core/automator.js                 |  409 -
 .../core/automator/automator-backend.js       |  374 +
 .../core/automator/automator-codemirror.js    |   97 +
 .../core/automator/automator-commands.js      |  545 +
 javascripts/core/automator/compiler.js        |  378 +
 javascripts/core/automator/lexer.js           |  287 +
 javascripts/core/automator/parser.js          |  140 +
 javascripts/core/big_crunch.js                |   64 +-
 javascripts/core/canvases.js                  |   70 -
 javascripts/core/challenge.js                 |    1 +
 javascripts/core/constants.js                 |   16 +-
 javascripts/core/eternity_challenge.js        |   63 +-
 javascripts/core/event-hub.js                 |    3 +-
 javascripts/core/extensions.js                |    4 +
 javascripts/core/hotkeys.js                   |    2 +-
 javascripts/core/perks.js                     |    1 -
 javascripts/core/player.js                    |   16 +-
 javascripts/core/reality.js                   |    1 -
 .../core/secret-formula/reality/automator.js  |  261 +
 javascripts/core/storage/storage.js           |   19 +-
 javascripts/core/timestudies.js               |   12 -
 javascripts/game.js                           |   14 +-
 javascripts/lib/Sortable.min.js               |    4 +-
 javascripts/lib/active-line.js                |   72 +
 javascripts/lib/chevrotain.min.js             |    2 +
 javascripts/lib/codemirror.js                 | 9755 +++++++++++++++++
 javascripts/lib/lint.js                       |  252 +
 javascripts/lib/show-hint.js                  |  460 +
 javascripts/lib/simple.js                     |  216 +
 javascripts/lib/vue-split-pane.min.js         |    1 +
 javascripts/lib/vuedraggable.min.js           |    1 -
 javascripts/lib/vuedraggable.umd.min.js       |    2 +
 stylesheets/automator.css                     |  171 +
 stylesheets/codemirror/codemirror.css         |  346 +
 stylesheets/codemirror/lint.css               |   73 +
 stylesheets/codemirror/liquibyte.css          |   95 +
 stylesheets/codemirror/panda-syntax.css       |   85 +
 stylesheets/codemirror/show-hint.css          |   36 +
 stylesheets/styles.css                        |  219 +-
 stylesheets/theme-Dark.css                    |   36 -
 stylesheets/theme-S6.css                      |   32 -
 60 files changed, 14536 insertions(+), 1033 deletions(-)
 create mode 100644 javascripts/components/reality/automator/automator-block-editor.js
 create mode 100644 javascripts/components/reality/automator/automator-block-tab.js
 create mode 100644 javascripts/components/reality/automator/automator-blocks.js
 create mode 100644 javascripts/components/reality/automator/automator-button.js
 create mode 100644 javascripts/components/reality/automator/automator-editor.js
 create mode 100644 javascripts/components/reality/automator/automator-single-block.js
 create mode 100644 javascripts/components/reality/automator/automator-tab.js
 create mode 100644 javascripts/components/reality/automator/docs/automator-docs-main-page.js
 create mode 100644 javascripts/components/reality/automator/docs/automator-docs.js
 create mode 100644 javascripts/components/reality/automator/docs/automator-man-page.js
 delete mode 100644 javascripts/core/automator.js
 create mode 100644 javascripts/core/automator/automator-backend.js
 create mode 100644 javascripts/core/automator/automator-codemirror.js
 create mode 100644 javascripts/core/automator/automator-commands.js
 create mode 100644 javascripts/core/automator/compiler.js
 create mode 100644 javascripts/core/automator/lexer.js
 create mode 100644 javascripts/core/automator/parser.js
 create mode 100644 javascripts/core/secret-formula/reality/automator.js
 create mode 100644 javascripts/lib/active-line.js
 create mode 100644 javascripts/lib/chevrotain.min.js
 create mode 100644 javascripts/lib/codemirror.js
 create mode 100644 javascripts/lib/lint.js
 create mode 100644 javascripts/lib/show-hint.js
 create mode 100644 javascripts/lib/simple.js
 create mode 100644 javascripts/lib/vue-split-pane.min.js
 delete mode 100644 javascripts/lib/vuedraggable.min.js
 create mode 100644 javascripts/lib/vuedraggable.umd.min.js
 create mode 100644 stylesheets/automator.css
 create mode 100644 stylesheets/codemirror/codemirror.css
 create mode 100644 stylesheets/codemirror/lint.css
 create mode 100644 stylesheets/codemirror/liquibyte.css
 create mode 100644 stylesheets/codemirror/panda-syntax.css
 create mode 100644 stylesheets/codemirror/show-hint.css

diff --git a/.eslintrc.json b/.eslintrc.json
index 9653a5f9f..918c9d79d 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -108,6 +108,7 @@
     "computed-property-spacing": "error",
     "consistent-this": "error",
     "func-call-spacing": "error",
+    "guard-for-in": "warn",
     "id-blacklist": [
       "error",
       "ret",
diff --git a/index.html b/index.html
index 996a91fac..53a660770 100644
--- a/index.html
+++ b/index.html
@@ -8,14 +8,20 @@
     <script type="text/javascript" src='https://cdn1.kongregate.com/javascripts/kongregate_api.js'></script>
     <script type="text/javascript" src="javascripts/lib/jquery-3.2.1.min.js"></script>
     <link href="https://fonts.googleapis.com/css?family=PT+Mono" rel="stylesheet">
+    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.2/css/all.css" integrity="sha384-oS3vJWv+0UjzBfQzYUhtDYW+Pj2yciDJxpsK1OYPAYjqT085Qq/1cq5FLXAZQ7Ay" crossorigin="anonymous">
+    <link rel="stylesheet" type="text/css" href="stylesheets/codemirror/codemirror.css">
+    <link rel="stylesheet" type="text/css" href="stylesheets/codemirror/show-hint.css">
+    <link rel="stylesheet" type="text/css" href="stylesheets/codemirror/lint.css">
+    <link rel="stylesheet" type="text/css" href="stylesheets/codemirror/panda-syntax.css">
+    <link rel="stylesheet" type="text/css" href="stylesheets/codemirror/liquibyte.css">
     <link rel="stylesheet" type="text/css" href="stylesheets/components.css">
     <link rel="stylesheet" type="text/css" href="stylesheets/ad-slider-component.css">
     <link rel="stylesheet" type="text/css" href="stylesheets/glyphs.css">
     <link rel="stylesheet" type="text/css" href="stylesheets/styles.css?3">
+    <link rel="stylesheet" type="text/css" href="stylesheets/automator.css">
     <link rel="stylesheet" type="text/css" href="stylesheets/time-studies.css">
     <link rel="stylesheet" type="text/css" href="stylesheets/tooltips.css">
     <link rel="stylesheet" type="text/css" href="stylesheets/vis.css">
-    <link rel="stylesheet" type="text/css" href="stylesheets/tln.css">
     <script>
         (function(i, s, o, g, r, a, m) {
             i['GoogleAnalyticsObject'] = r;
@@ -110,219 +116,7 @@
               <reality-upgrades-tab v-if="view.tabs.current === 'reality-tab' && view.tabs.reality.subtab === 'upgrades'"></reality-upgrades-tab>
             </div>
             <div id="automation" class="realitytab" style="display: none;">
-                <span id="automatorUnlock"><br><br><br>You need to get 4 Realities to unlock the automator</span>
-                <div class="automator-container">
-                    <div id="rowsAvailable">Your automator can use 4 rows; next row at 9 realities.</div>
-                    <canvas id="automatorTreeCanvas"></canvas>
-                    <div>
-                        <div style="display: flex; flex-direction: row; justify-content: center; align-items: center; margin-bottom: 3px;">
-                            <p id="automatorloadsavetext">load:</p>
-                            <automator-save-load-button v-for="saveslot in 3" :key="saveslot" :saveslot="saveslot"></automator-save-load-button>
-                            <label for="automatorOn" style="margin-left: 40px;">on:</label>
-                            <input type="checkbox" name="automatorOn" id="automatorOn" onChange="automatorOnOff()">
-                        </div>
-                        <textarea name="automator" id="automator" cols="30" spellcheck="false" onChange="updateAutomatorState()"></textarea>
-                    </div>
-                    <table class="table" id="studytable">
-                      <tr>
-                        <td>
-                          <automator-shop-button name="WAIT">
-                            <template slot="button-content">
-                              WAIT<br>
-                              Cost: 1 RM
-                            </template>
-                            <template slot="tooltip-header">
-                              WAIT [target] [amount]
-                            </template>
-                            <template slot="tooltip-content">
-                              Waits for something to pass a certain point, "Wait EP 1e2000" waits until you have 1e2000 ep. "Wait time 10"
-                              waits 10 seconds.
-                            </template>
-                          </automator-shop-button>
-                        </td>
-                        <td><button class="automatorinstruction" style="opacity: 0;"></button></td>
-                        <td>
-                          <automator-shop-button name="BUY">
-                            <template slot="button-content">
-                              BUY<br>
-                            </template>
-                            <template slot="tooltip-header">
-                              BUY [target] [amount/ID]
-                            </template>
-                            <template slot="tooltip-content">
-                              Buys stuff, "Buy study 11" buys the first timestudy. Hold shift to see study IDs.</template>
-                          </automator-shop-button>
-                        </td>
-                      </tr>
-                    </table>
-                    <br>
-                    <table class="table" id="studytable">
-                      <tr>
-                        <td><automator-shop-button name="IF">
-                        </automator-shop-button></td>
-                        <td><automator-shop-button name="ANTIMATTER"></automator-shop-button></td>
-                        <td><automator-shop-button name="EP"></automator-shop-button></td>
-                        <td><automator-shop-button name="STUDY"></automator-shop-button></td>
-                        <td><automator-shop-button name="STUDYUNTIL"></automator-shop-button></td>
-                        <td>
-                          <automator-shop-button name="STUDYPATH">
-                            <template slot="button-content">
-                              STUDYPATH<br>Cost: 50 RM
-                            </template>
-                            <template slot="tooltip-header">
-                              BUY STUDYPATH [all/none] [study ids and path names]
-                            </template>
-                            <template slot="tooltip-content">
-                              Buys studies top-down using arguments after the mode specification. The 2 modes specify to buy "all" or
-                              "none" of the studies on non-locked splits (incl. 62 and 33). Locked paths must be specified by ID # or split
-                              name.
-                            </template>
-                          </automator-shop-button>
-                        </td>
-                      </tr>
-                    </table>
-                    <table class="table" id="studytable">
-                      <tr>
-                          <td><automator-shop-button name="GOTO"></automator-shop-button></td>
-                          <td><automator-shop-button name="IP"></automator-shop-button></td>
-                          <td><automator-shop-button name="REPLICANTI"></automator-shop-button></td>
-                          <td><automator-shop-button name="TTEP"></automator-shop-button></td>
-                          <td><automator-shop-button name="TTIP"></automator-shop-button></td>
-                          <td><automator-shop-button name="STUDYIMPORT"></automator-shop-button></td>
-                      </tr>
-                    </table>
-                    <table class="table" id="studytable">
-                      <tr>
-                          <td><automator-shop-button name="TIME"></automator-shop-button></td>
-                          <td><automator-shop-button name="RG"></automator-shop-button></td>
-                          <td><automator-shop-button name="TTAM"></automator-shop-button></td>
-                          <td><automator-shop-button name="TTMAX"></automator-shop-button></td>
-                      </tr>
-                    </table>
-                    <table class="table" id="studytable">
-                      <tr>
-                        <td>
-                          <automator-shop-button name="LOAD">
-                            <template slot="button-content">
-                              LOAD<br>Cost: 30 RM
-                            </template>
-                            <template slot="tooltip-header">
-                              LOAD [automatorscriptnumber]
-                            </template>
-                            <template slot="tooltip-content">
-                              You can load different automatorscripts with this, "Load 2" loads the second script
-                            </template>
-                          </automator-shop-button>
-                        </td>
-                        <td><automator-shop-button name="MAX"></automator-shop-button></td>
-                        <td>
-                          <automator-shop-button name="TOGGLE">
-                            <template slot="button-content">
-                              TOGGLE<br>Cost: 30 RM
-                            </template>
-                            <template slot="tooltip-header">
-                              TOGGLE [autobuyer]
-                            </template>
-                            <template slot="tooltip-content">
-                              Toggles autobuyers on and off, "Toggle D1" for example. Targets include: DX, Tickspeed, Galaxy, Dimboost,
-                              Infinity, Eternity, Sacrifice, and RG
-                            </template>
-                          </automator-shop-button>
-                        </td>
-                        <td>
-                          <automator-shop-button name="UNLOCK">
-                            <template slot="button-content">
-                              UNLOCK<br>Cost: 30 RM
-                            </template>
-                            <template slot="tooltip-header">
-                              UNLOCK [target] [(id)]
-                            </template>
-                            <template slot="tooltip-content">
-                              Unlocks either ECs "Unlock EC 3", or dilation "Unlock dilation"
-                            </template>
-                          </automator-shop-button>
-                        </td>
-                      </tr>
-                      <tr>
-                        <td>
-                          <automator-shop-button name="RESPEC">
-                            <template slot="button-content">
-                              RESPEC<br>Cost: 30 RM
-                            </template>
-                            <template slot="tooltip-header">
-                              RESPEC
-                            </template>
-                            <template slot="tooltip-content">
-                              Toggles respec on, so next eternity your time studies will reset.
-                            </template>
-                          </automator-shop-button>
-                        </td>
-                        <td>
-                          <automator-shop-button name="ETERNITY">
-                            <template slot="button-content">
-                              ETERNITY<br>Cost: 30 RM
-                            </template>
-                            <template slot="tooltip-header">
-                              ETERNITY
-                            </template>
-                            <template slot="tooltip-content">
-                              Does an eternity if able, if not it waits until it can eternity.
-                            </template>
-                          </automator-shop-button>
-                        </td>
-                        <td><automator-shop-button name="UNLOCK_DILATION"></automator-shop-button></td>
-                        <td><automator-shop-button name="UNLOCK_EC"></automator-shop-button></td>
-                      </tr>
-                      <tr>
-                        <td>
-                          <automator-shop-button name="CHANGE">
-                            <template slot="button-content">
-                              CHANGE<br>Cost: 30 RM
-                            </template>
-                            <template slot="tooltip-header">
-                              CHANGE [IPAUTOBUYER/EPAUTOBUYER] [amount]
-                            </template>
-                            <template slot="tooltip-content">
-                              You can change the amount in your autobuyers "CHANGE IPAUTOBUYER 1e2000" for example
-                            </template>
-                          </automator-shop-button>
-                        </td>
-                        <td>
-                          <automator-shop-button name="STOP">
-                            <template slot="button-content">
-                              STOP<br>Cost: 30 RM
-                            </template>
-                            <template slot="tooltip-header">
-                              STOP
-                            </template>
-                            <template slot="tooltip-content">
-                              Stops the whole automator.
-                            </template>
-                          </automator-shop-button>
-                        </td>
-                        <td><button class="automatorinstruction" style="opacity: 0;"></button></td>
-                        <td>
-                          <automator-shop-button name="START">
-                            <template slot="button-content">
-                              START<br>Cost: 30 RM
-                            </template>
-                            <template slot="tooltip-header">
-                              START [target] [(id)]
-                            </template>
-                            <template slot="tooltip-content">
-                              Starts either ECs "Start EC 3", or dilation "Start dilation"
-                            </template>
-                          </automator-shop-button>
-                        </td>
-                      </tr>
-                      <tr>
-                        <td><automator-shop-button name="IPAUTOBUYER"></automator-shop-button></td>
-                        <td><automator-shop-button name="EPAUTOBUYER"></automator-shop-button></td>
-                        <td><automator-shop-button name="START_DILATION"></automator-shop-button></td>
-                        <td><automator-shop-button name="START_EC"></automator-shop-button></td>
-                      </tr>
-                    </table>
-                </div>
+              <automator-tab v-if="view.tabs.current === 'reality-tab' && view.tabs.reality.subtab === 'automation'"></automator-tab>
             </div>
             <div id="blackhole" class="realitytab" style="display: none;">
               <black-hole-tab v-if="view.tabs.current === 'reality-tab' && view.tabs.reality.subtab === 'blackhole'"></black-hole-tab>
@@ -367,12 +161,18 @@
 <script type="text/javascript" src="javascripts/lib/sha512.min.js"></script>
 <script type="text/javascript" src="javascripts/lib/deepmerge.js"></script>
 <script type="text/javascript" src="javascripts/lib/Sortable.min.js"></script>
-<script type="text/javascript" src="javascripts/lib/vuedraggable.min.js"></script>
+<script type="text/javascript" src="javascripts/lib/vuedraggable.umd.min.js"></script>
 <script type="text/javascript" src="javascripts/lib/Tween.min.js"></script>
 <script type="text/javascript" src="javascripts/lib/gamma.js"></script>
+<script type="text/javascript" src="javascripts/lib/vue-split-pane.min.js"></script>
+<script type="text/javascript" src="javascripts/lib/chevrotain.min.js"></script>
+<script type="text/javascript" src="javascripts/lib/codemirror.js"></script>
+<script type="text/javascript" src="javascripts/lib/simple.js"></script>
+<script type="text/javascript" src="javascripts/lib/show-hint.js"></script>
+<script type="text/javascript" src="javascripts/lib/lint.js"></script>
+<script type="text/javascript" src="javascripts/lib/active-line.js"></script>
 <script type="text/javascript" src="PlayFab/PlayFabClientApi.js"></script>
 <script type="text/javascript" src="javascripts/DragDropTouch.js"></script>
-<script type="text/javascript" src="javascripts/tln.js"></script>
 <script type="text/javascript" src="javascripts/longpress.js"></script>
 
 <script type="text/javascript" src="javascripts/core/polyfill.js"></script>
@@ -383,6 +183,7 @@
 <script type="text/javascript" src="javascripts/core/constants.js"></script>
 <script type="text/javascript" src="javascripts/core/math.js"></script>
 
+<script type="text/javascript" src="javascripts/core/automator/automator-backend.js"></script>
 <script type="text/javascript" src="javascripts/core/secret-formula/effects.js"></script>
 <script type="text/javascript" src="javascripts/core/secret-formula/game-database.js"></script>
 <script type="text/javascript" src="javascripts/core/glyph-effects.js"></script>
@@ -439,6 +240,7 @@
 <script type="text/javascript" src="javascripts/core/secret-formula/eternity/dilation-upgrades.js"></script>
 <script type="text/javascript" src="javascripts/core/secret-formula/reality/reality-upgrades.js"></script>
 <script type="text/javascript" src="javascripts/core/secret-formula/reality/perks.js"></script>
+<script type="text/javascript" src="javascripts/core/secret-formula/reality/automator.js"></script>
 <script type="text/javascript" src="javascripts/core/secret-formula/reality/glyph-sacrifices.js"></script>
 <script type="text/javascript" src="javascripts/core/secret-formula/celestials/effarig.js"></script>
 <script type="text/javascript" src="javascripts/core/secret-formula/celestials/v.js"></script>
@@ -597,6 +399,17 @@
 <script type="text/javascript" src="javascripts/components/reality/black-hole/black-hole-upgrade-button.js"></script>
 <script type="text/javascript" src="javascripts/components/reality/black-hole/black-hole-upgrade-row.js"></script>
 
+<script type="text/javascript" src="javascripts/components/reality/automator/automator-tab.js"></script>
+<script type="text/javascript" src="javascripts/components/reality/automator/automator-button.js"></script>
+<script type="text/javascript" src="javascripts/components/reality/automator/automator-editor.js"></script>
+<script type="text/javascript" src="javascripts/components/reality/automator/docs/automator-docs.js"></script>
+<script type="text/javascript" src="javascripts/components/reality/automator/docs/automator-docs-main-page.js"></script>
+<script type="text/javascript" src="javascripts/components/reality/automator/docs/automator-man-page.js"></script>
+<script type="text/javascript" src="javascripts/components/reality/automator/automator-blocks.js"></script>
+<script type="text/javascript" src="javascripts/components/reality/automator/automator-block-editor.js"></script>
+<script type="text/javascript" src="javascripts/components/reality/automator/automator-block-tab.js"></script>
+<script type="text/javascript" src="javascripts/components/reality/automator/automator-single-block.js"></script>
+
 <script type="text/javascript" src="javascripts/components/modals/modal-popup.js"></script>
 <script type="text/javascript" src="javascripts/components/modals/modal-shortcuts.js"></script>
 <script type="text/javascript" src="javascripts/components/modals/modal-message.js"></script>
@@ -622,6 +435,11 @@
 <script type="text/javascript" src="javascripts/components/new-ui/sidebar-resources/sidebar-ep.js"></script>
 <script type="text/javascript" src="javascripts/components/new-ui/sidebar-resources/sidebar-rm.js"></script>
 
+<script type="text/javascript" src="javascripts/core/automator/automator-codemirror.js"></script>
+<script type="text/javascript" src="javascripts/core/automator/lexer.js"></script>
+<script type="text/javascript" src="javascripts/core/automator/automator-commands.js"></script>
+<script type="text/javascript" src="javascripts/core/automator/parser.js"></script>
+<script type="text/javascript" src="javascripts/core/automator/compiler.js"></script>
 
 <script type="text/javascript" src="javascripts/core/app/ui.init.js"></script>
 <script type="text/javascript" src="javascripts/core/app/player-progress.js"></script>
@@ -651,7 +469,6 @@
 <script type="text/javascript" src="javascripts/core/replicanti.js"></script>
 <script type="text/javascript" src="javascripts/core/timestudies.js"></script>
 <script type="text/javascript" src="javascripts/core/rm.js"></script>
-<script type="text/javascript" src="javascripts/core/automator.js"></script>
 <script type="text/javascript" src="javascripts/core/perks.js"></script>
 <script type="text/javascript" src="javascripts/core/canvases.js"></script>
 <script type="text/javascript" src="javascripts/core/dilation.js"></script>
diff --git a/javascripts/components/automator-buttons.js b/javascripts/components/automator-buttons.js
index 5c5169745..a314e40b5 100644
--- a/javascripts/components/automator-buttons.js
+++ b/javascripts/components/automator-buttons.js
@@ -74,21 +74,21 @@ Vue.component("automator-shop-button", {
         "automatorinstruction": this.available,
         "automatorinstructionlocked": !this.available
       };
-      classObject[Automator.Instructions[this.name].type] = true;
+      classObject[AutomatorInstructions.Instructions[this.name].type] = true;
       return classObject;
     },
     // This assumes prices are constant
     cost() {
-      return Automator.Instructions[this.name].price;
+      return AutomatorInstructions.Instructions[this.name].price;
     },
     instructionID() {
-      return Automator.Instructions[this.name].id;
+      return AutomatorInstructions.Instructions[this.name].id;
     },
     domID() {
-      return "automator" + Automator.Instructions[this.name].id;
+      return "automator" + AutomatorInstructions.Instructions[this.name].id;
     },
     displayName() {
-      return Automator.Instructions[this.name].displayName;
+      return AutomatorInstructions.Instructions[this.name].displayName;
     },
     popoverTrigger() {
       // If the html did not specify a tooltip, we set the trigger to
diff --git a/javascripts/components/header/game-header-big-crunch-button.js b/javascripts/components/header/game-header-big-crunch-button.js
index a521c24ca..98f980bc8 100644
--- a/javascripts/components/header/game-header-big-crunch-button.js
+++ b/javascripts/components/header/game-header-big-crunch-button.js
@@ -34,7 +34,7 @@ Vue.component("game-header-big-crunch-button", {
     `<button
       v-if="isVisible"
       class="o-prestige-btn o-prestige-btn--big-crunch l-game-header__big-crunch-btn"
-      onclick="bigCrunchReset()"
+      onclick="bigCrunchResetRequest()"
     >
       <b>Big Crunch for {{shortenDimensions(gainedIP)}} Infinity {{ "point" | pluralize(gainedIP) }}.</b>
       <template v-if="isPeakIPPMVisible">
diff --git a/javascripts/components/header/game-header-eternity-button.js b/javascripts/components/header/game-header-eternity-button.js
index c8a9f8551..03e45c2c7 100644
--- a/javascripts/components/header/game-header-eternity-button.js
+++ b/javascripts/components/header/game-header-eternity-button.js
@@ -63,37 +63,13 @@ Vue.component("game-header-eternity-button", {
       this.peakEPPM.copyFrom(EPminpeak);
     },
     updateChallengeWithRUPG() {
-      const currentEC = EternityChallenge.current;
-      const currentCompletions = currentEC.completions;
-      this.fullyCompleted = currentCompletions === 5;
+      const status = EternityChallenge.gainedCompletionStatus();
+      this.fullyCompleted = status.fullyCompleted;
       if (this.fullyCompleted) return;
-      let gainedCompletions = 1;
-      while (
-        player.infinityPoints.gte(currentEC.goalAtCompletions(currentCompletions + gainedCompletions)) &&
-        gainedCompletions < 5 - currentCompletions
-      ) {
-        gainedCompletions++;
-      }
-      const totalCompletions = currentCompletions + gainedCompletions;
-      let maxEC4Valid = 0;
-      if(player.infinitied.lte(16)) maxEC4Valid = 5 - Math.ceil(player.infinitied.toNumber() / 4);
-      if (EternityChallenge(4).isRunning && totalCompletions >= maxEC4Valid && gainedCompletions > 1) {
-        this.gainedCompletions = Math.min(totalCompletions, maxEC4Valid) - currentCompletions;
-        this.failedCondition = "(Too many infinities for more)";
-        return;
-      }
-
-      const maxEC12Valid = 5 - Math.floor(player.thisEternity / 200);
-      if (EternityChallenge(12).isRunning && totalCompletions >= maxEC12Valid && gainedCompletions > 1) {
-        this.gainedCompletions = Math.min(totalCompletions, maxEC12Valid) - currentCompletions;
-        this.failedCondition = "(Too slow for more)";
-        return;
-      }
-
-      this.gainedCompletions = gainedCompletions;
-      this.failedCondition = undefined;
-      this.hasMoreCompletions = totalCompletions < 5;
-      this.nextGoalAt.copyFrom(currentEC.goalAtCompletions(totalCompletions));
+      this.gainedCompletions = status.gainedCompletions;
+      this.failedCondition = status.failedCondition;
+      this.hasMoreCompletions = status.hasMoreCompletions;
+      this.nextGoalAt.copyFrom(status.nextGoalAt);
     }
   },
   template:
diff --git a/javascripts/components/new-ui.js b/javascripts/components/new-ui.js
index dc1af737e..028a3e690 100644
--- a/javascripts/components/new-ui.js
+++ b/javascripts/components/new-ui.js
@@ -23,7 +23,7 @@ Vue.component("new-ui", {
         <component :is="$viewModel.page" v-if="!showCrunch"></component>
         <div v-else>
           <h3>The world has collapsed due to excess antimatter.</h3>
-          <button class="btn-big-crunch" onclick="bigCrunchReset()">Big Crunch</button>
+          <button class="btn-big-crunch" onclick="bigCrunchResetRequest()">Big Crunch</button>
         </div>
       </div>
     </div>
diff --git a/javascripts/components/new-ui/sidebar-resources/sidebar-ip.js b/javascripts/components/new-ui/sidebar-resources/sidebar-ip.js
index 0a95c1db1..4579faecc 100644
--- a/javascripts/components/new-ui/sidebar-resources/sidebar-ip.js
+++ b/javascripts/components/new-ui/sidebar-resources/sidebar-ip.js
@@ -19,7 +19,7 @@ Vue.component("sidebar-ip", {
     },
     infinity() {
       if (this.showCrunch) {
-        bigCrunchReset();
+        bigCrunchResetRequest();
       }
     }
   },
diff --git a/javascripts/components/reality/automator/automator-block-editor.js b/javascripts/components/reality/automator/automator-block-editor.js
new file mode 100644
index 000000000..5d5cf5dd7
--- /dev/null
+++ b/javascripts/components/reality/automator/automator-block-editor.js
@@ -0,0 +1,69 @@
+"use strict";
+
+function parseBlock(block, indentation = 0) {
+  let ret = "\t".repeat(indentation) + block.cmd
+
+  if (block.target) ret += " " + block.target
+  if (block.secondaryTarget) ret += " " + block.secondaryTarget
+  if (block.inputValue) ret += " " + block.inputValue
+  if (block.cmd == "IF" || block.cmd == "WHILE") ret += " " + "{"
+
+  return ret
+}
+
+function parseLines(l, indentation = 0) {
+  let lines = []
+  for (let i = 0; i < l.length; i++) {
+    lines.push(parseBlock(l[i], indentation))
+    if (l[i].cmd == "IF" || l[i].cmd == "WHILE") {
+      lines.push( ...parseLines(l[i].nest, indentation + 1) )
+      lines.push("\t".repeat(indentation) + "}")
+    }
+  }
+
+  return lines
+}
+
+Vue.component("automator-block-editor", {
+  data() {
+    return {
+      lines: []
+    }
+  },
+  computed: {
+    lineNumbersCount() {
+      return Math.max(this.lines.length, 1);
+    }
+  },
+  updated() {
+    
+  },
+  methods: {
+    updateBlock(block, id) {
+      this.lines[this.lines.findIndex( x => x.id == id)] = block
+      console.log(this.lines)
+    },
+    deleteBlock(id) {
+      let idx = this.lines.findIndex( x => x.id == id)
+      this.lines.splice(idx, 1)
+    },
+    parseLines() {
+      $("#automator").val( parseLines(this.lines).join("\n") )
+      updateState()
+      console.log(parseLines(this.lines))
+    }
+  },
+  template:
+    `<div class="c-automator-block-editor l-automator-editor">
+      <button @click="parseLines">Parse <br>into <br>automator</button>
+      <draggable v-model="lines" group="code-blocks" class="c-automator-blocks">
+        <automator-single-block 
+          v-for="(block, index) in lines" 
+          :key="block.id"
+          :lineNumber="index"
+          :block="block"
+          :updateBlock="updateBlock"
+          :deleteBlock="deleteBlock"></automator-single-block>
+      </draggable>
+    </div>`
+});
\ No newline at end of file
diff --git a/javascripts/components/reality/automator/automator-block-tab.js b/javascripts/components/reality/automator/automator-block-tab.js
new file mode 100644
index 000000000..adebd1f40
--- /dev/null
+++ b/javascripts/components/reality/automator/automator-block-tab.js
@@ -0,0 +1,25 @@
+"use strict";
+
+Vue.component("automator-block-tab", {
+  data: function() {
+    return {
+      lines: []
+    }
+  },
+  methods: {
+    update() {
+      //console.log(this.lines.length)
+    },
+    updateBlocks(lines) {
+      this.lines = lines;
+    }
+  },
+  template:
+  // TODO: fix css classes - they were adjusted for text editor tab
+    `<div class="c-automator l-automator l-automator-tab">
+      <split-pane :min-percent="20" :default-percent="80" split="vertical" class="_-automator-split-pane-fix">
+        <automator-block-editor slot="paneL"/>
+        <automator-blocks slot="paneR"/>
+      </split-pane>
+    </div>`
+});
diff --git a/javascripts/components/reality/automator/automator-blocks.js b/javascripts/components/reality/automator/automator-blocks.js
new file mode 100644
index 000000000..98d8faafc
--- /dev/null
+++ b/javascripts/components/reality/automator/automator-blocks.js
@@ -0,0 +1,89 @@
+const automator_blocks = [
+  { 
+    cmd: 'WAIT',
+    targets: ['IP', 'EP', 'AM', 'TIME', 'REPLICANTI', 'RG', 'TT'],
+    hasInput: true
+  } , { 
+    cmd: 'BUY',
+    targets: ['STUDY', 'STUDYUNTIL', 'TTIP', 'TTEP', 'TTAM', 'TTMAX'],
+    hasInput: true,
+    targetsWithoutInput: ['TTMAX']
+  }, {
+    cmd: 'IF',
+    targets: ['IP', 'EP', 'AM', 'REPLICANTI', 'RG', 'TT'],
+    secondaryTargets: ['=', '<', '>', '>=', '<=', '!='],
+    hasInput: true,
+    nested: true
+  }, {
+    cmd: 'WHILE',
+    targets: ['IP', 'EP', 'AM', 'REPLICANTI', 'RG', 'TT'],
+    secondaryTargets: ['=', '<', '>', '>=', '<=', '!='],
+    hasInput: true,
+    nested: true
+  }, {
+    cmd: 'GOTO',
+    hasInput: true
+  }, {
+    cmd: 'UNLOCK',
+    targets: ['EC', 'DILATION'],
+    hasInput: true,
+    targetsWithoutInput: ['DILATION']
+  }, {
+    cmd: 'START',
+    targets: ['EC', 'DILATION'],
+    hasInput: true,
+    targetsWithoutInput: ['DILATION']
+  }, {
+    cmd: 'CHANGE',
+    targets: ['IP-autobuyer', 'EP-autobuyer'],
+    hasInput: true
+  }, {
+    cmd: 'RESPEC'
+  }, {
+    cmd: 'ETERNITY'
+  }, {
+    cmd: 'STOP'
+  }, {
+    cmd: 'LOAD',
+    hasInput: true
+  }, {
+    cmd: 'BLOCK',
+    getTargets: () => [], // TODO
+    targets: []
+  },
+
+]
+
+
+Vue.component("automator-blocks", {
+  data() {
+    return {
+      blocks: automator_blocks
+    }
+  },
+  methods: {
+    clone(block) {
+      let b = {
+        ...block,
+        id: UIID.next()
+      }
+
+      if (block.nested) b.nest = []
+      if (block.targets) b.target = ""
+      if (block.hasInput) b.inputValue = ""
+      if (block.secondaryTargets) b.secondaryTarget = ""
+      return b
+    }
+  },
+  template:
+    `<div class="c-automator-docs">
+      <draggable 
+        :list="blocks"
+        :group="{ name: 'code-blocks', pull: 'clone', put: false }"
+        :sort="false"
+        :clone="clone"
+        class="c-automator-command-list">
+        <div v-for="block in blocks" :key="block.id" class="o-automator-command"> {{ block.cmd }}</div>
+      </draggable>
+    </div>`
+});
\ No newline at end of file
diff --git a/javascripts/components/reality/automator/automator-button.js b/javascripts/components/reality/automator/automator-button.js
new file mode 100644
index 000000000..9f97c3a4b
--- /dev/null
+++ b/javascripts/components/reality/automator/automator-button.js
@@ -0,0 +1,7 @@
+"use strict";
+
+Vue.component("automator-button", {
+  template: `
+    <button class="c-automator__button l-automator__button fas" @click="emitClick" />
+  `
+});
diff --git a/javascripts/components/reality/automator/automator-editor.js b/javascripts/components/reality/automator/automator-editor.js
new file mode 100644
index 000000000..c3dd7f0da
--- /dev/null
+++ b/javascripts/components/reality/automator/automator-editor.js
@@ -0,0 +1,256 @@
+"use strict";
+
+const AutomatorUI = {
+  wrapper: null,
+  editor: null,
+  mode: {
+    mode: "automato",
+    lint: "automato",
+    lineNumbers: true,
+    styleActiveLine: true,
+    theme: "liquibyte",
+  },
+  documents: {},
+  initialize() {
+    if (this.container) return;
+    this.container = document.createElement("div");
+    this.container.className = "l-automator-editor__codemirror-container";
+    const textArea = document.createElement("textarea");
+    this.container.appendChild(textArea);
+    this.editor = CodeMirror.fromTextArea(textArea, this.mode);
+    this.editor.on("keydown", (editor, event) => {
+      if (editor.state.completionActive) return;
+      const key = event.key;
+      if (event.ctrlKey || event.altKey || event.metaKey || !/^[a-zA-Z0-9 \t]$/u.test(key)) return;
+      CodeMirror.commands.autocomplete(editor, null, { completeSingle: false });
+    });
+    this.editor.on("change", editor => {
+      const scriptID = ui.view.tabs.reality.automator.editorScriptID;
+      AutomatorBackend.saveScript(scriptID, editor.getDoc().getValue());
+    });
+    EventHub.ui.on(GameEvent.GAME_LOAD, () => this.documents = {});
+  }
+};
+
+Vue.component("automator-editor", {
+  data() {
+    return {
+      code: null,
+      activeLine: 0,
+      isRunning: false,
+      isPaused: false,
+      repeatOn: false,
+      editingName: false,
+      runningScriptID: 0,
+      scripts: [],
+    };
+  },
+  watch: {
+    activeLine(newVal, oldVal) {
+      if (oldVal > 0) {
+        AutomatorUI.editor.removeLineClass(oldVal - 1, "background", "c-automator-editor__active-line");
+        AutomatorUI.editor.removeLineClass(oldVal - 1, "gutter", "c-automator-editor__active-line-gutter");
+      }
+      if (newVal > 0) {
+        AutomatorUI.editor.addLineClass(newVal - 1, "background", "c-automator-editor__active-line");
+        AutomatorUI.editor.addLineClass(newVal - 1, "gutter", "c-automator-editor__active-line-gutter");
+      }
+    },
+    fullScreen() {
+      this.$nextTick(() => AutomatorUI.editor.refresh());
+    }
+  },
+  computed: {
+    fullScreen() {
+      return this.$viewModel.tabs.reality.automator.fullScreen;
+    },
+    currentScriptID: {
+      get() {
+        return this.$viewModel.tabs.reality.automator.editorScriptID;
+      },
+      set(value) {
+        this.$viewModel.tabs.reality.automator.editorScriptID = value;
+      }
+    },
+    mode: {
+      get() {
+        return this.$viewModel.tabs.reality.automator.mode;
+      },
+      set(value) {
+        this.$viewModel.tabs.reality.automator.mode = value;
+      }
+    },
+    modeIconClass() {
+      return this.mode ? "fa-cubes" : "fa-code";
+    },
+    playTooltip() {
+      if (this.isRunning) return undefined;
+      if (this.isPaused) return "Resume automator execution";
+      return "Start automator";
+    }
+  },
+  methods: {
+    update() {
+      this.isRunning = AutomatorBackend.isRunning;
+      this.isPaused = AutomatorBackend.isOn && !this.isRunning;
+      this.repeatOn = AutomatorBackend.state.repeat;
+      this.runningScriptID = AutomatorBackend.state.topLevelScript;
+      if (AutomatorBackend.state.topLevelScript !== this.currentScriptID || !AutomatorBackend.isOn) {
+        this.activeLine = 0;
+        return;
+      }
+      const newLineNumber = AutomatorBackend.stack.top.lineNumber;
+      if (newLineNumber > AutomatorUI.editor.getDoc().lineCount()) {
+        this.activeLine = 0;
+        return;
+      }
+      this.activeLine = newLineNumber;
+    },
+    onGameLoad() {
+      AutomatorUI.documents = {};
+      this.updateCurrentScriptID();
+      this.updateScriptList();
+    },
+    updateScriptList() {
+      this.scripts = Object.values(player.reality.automator.scripts).map(script => ({
+        id: script.id,
+        name: script.name,
+      }));
+    },
+    updateCurrentScriptID() {
+      const storedScripts = player.reality.automator.scripts;
+      this.currentScriptID = player.reality.automator.state.editorScript;
+      // This shouldn't happen if things are loaded in the right order, but might as well be sure.
+      if (storedScripts[this.currentScriptID] === undefined) {
+        this.currentScriptID = Object.keys(storedScripts)[0];
+        player.reality.automator.state.editorScript = this.currentScriptID;
+      }
+      if (AutomatorUI.documents[this.currentScriptID] === undefined) {
+        AutomatorUI.documents[this.currentScriptID] =
+          CodeMirror.Doc(storedScripts[this.currentScriptID].content, "automato");
+      }
+      AutomatorUI.editor.swapDoc(AutomatorUI.documents[this.currentScriptID]);
+    },
+    rewind: () => AutomatorBackend.restart(),
+    play() {
+      if (AutomatorBackend.isOn) AutomatorBackend.mode = AutomatorMode.RUN;
+      else AutomatorBackend.start(this.currentScriptID);
+    },
+    pause: () => AutomatorBackend.pause(),
+    stop: () => AutomatorBackend.stop(),
+    step() {
+      if (AutomatorBackend.isOn) AutomatorBackend.mode = AutomatorMode.SINGLE_STEP;
+      else AutomatorBackend.start(this.currentScriptID, AutomatorMode.SINGLE_STEP);
+    },
+    repeat: () => AutomatorBackend.toggleRepeat(),
+    rename() {
+      this.editingName = true;
+      this.$nextTick(() => {
+        this.$refs.renameInput.value = player.reality.automator.scripts[this.currentScriptID].name;
+        this.$refs.renameInput.focus();
+      });
+    },
+    selectedScriptAttribute(id) {
+      return id === this.currentScriptID ? { selected: "selected" } : {};
+    },
+    createNewScript() {
+      const newScript = AutomatorBackend.newScript();
+      player.reality.automator.state.editorScript = newScript.id;
+      this.updateScriptList();
+      this.rename();
+    },
+    onScriptDropdown(event) {
+      const menu = event.target;
+      if (menu.selectedIndex === menu.length - 1) this.createNewScript();
+      else player.reality.automator.state.editorScript = this.scripts[menu.selectedIndex].id;
+      this.updateCurrentScriptID();
+    },
+    nameEdited() {
+      // Trim off leading and trailing whitespace
+      const trimmed = this.$refs.renameInput.value.match(/^\s*(.*?)\s*$/u);
+      if (trimmed.length === 2 && trimmed[1].length > 0) {
+        player.reality.automator.scripts[this.currentScriptID].name = trimmed[1];
+        this.updateScriptList();
+      }
+      this.$nextTick(() => this.editingName = false);
+    },
+    dropdownLabel(script) {
+      let label = script.name;
+      if (script.id === this.runningScriptID) {
+        if (this.isRunning) label += " (Running)";
+        else if (this.isPaused) label += " (Paused)";
+      }
+      return label;
+    }
+  },
+  created() {
+    AutomatorUI.initialize();
+    EventHub.ui.on(GameEvent.GAME_LOAD, () => this.onGameLoad(), this);
+    this.updateCurrentScriptID();
+    this.updateScriptList();
+  },
+  mounted() {
+    this.$refs.container.appendChild(AutomatorUI.container);
+    this.$nextTick(() => AutomatorUI.editor.refresh());
+  },
+  beforeDestroy() {
+    if (this.activeLine > 0) {
+      // This will stick around, otherwise
+      AutomatorUI.editor.removeLineClass(this.activeLine - 1, "background", "c-automator-editor__active-line");
+    }
+    this.$refs.container.removeChild(AutomatorUI.container);
+    EventHub.ui.offAll(this);
+  },
+  template:
+    `<div class="l-automator-pane">
+      <div class="c-automator__controls l-automator__controls l-automator-pane__controls">
+        <automator-button class="fa-fast-backward"
+          @click="rewind"
+          v-tooltip="'rewind automator to the first command'"/>
+        <automator-button
+          class="fa-play"
+          :class="{ 'c-automator__button-play--active' : isRunning }"
+          @click="play"
+          v-tooltip="playTooltip"
+        />
+        <automator-button class="fa-pause"
+          :class="{ 'c-automator__button--active': isPaused }"
+          @click="pause"
+          v-tooltip="'Pause automator on current command'"/>
+        <automator-button class="fa-stop"
+          @click="stop"
+          v-tooltip="'Stop automator and reset position'"/>
+        <automator-button class="fa-step-forward"
+          @click="step"
+          v-tooltip="'Step forward one line'"/>
+        <automator-button
+          class="fa-sync-alt"
+          :class="{ 'c-automator__button--active' : repeatOn }"
+          @click="repeat"
+          v-tooltip="'Restart script automatically when it completes'"
+        />
+        <div class="l-automator__script-names">
+          <template v-if="!editingName">
+            <select class="l-automator__scripts-dropdown"
+                    @input="onScriptDropdown">
+              <option v-for="script in scripts"
+                      v-bind="selectedScriptAttribute(script.id)"
+                      :value="script.id">{{dropdownLabel(script)}}</option>
+              <option value="createNewScript">Create new...</option>
+            </select>
+            <automator-button class="far fa-edit" @click="rename"/>
+          </template>
+          <input v-else ref="renameInput"
+                        class="l-automator__rename-input"
+                        @blur="nameEdited"
+                        @keyup.enter="$refs.renameInput.blur()"/>
+        </div>
+        <automator-button
+          class="l-automator__button--corner"
+          :class="modeIconClass"
+          @click="mode = !mode"
+        />
+      </div>
+      <div class="c-automator-editor l-automator-editor l-automator-pane__content" ref="container" />
+    </div>`
+});
diff --git a/javascripts/components/reality/automator/automator-single-block.js b/javascripts/components/reality/automator/automator-single-block.js
new file mode 100644
index 000000000..57c72ddb6
--- /dev/null
+++ b/javascripts/components/reality/automator/automator-single-block.js
@@ -0,0 +1,53 @@
+"use strict";
+
+Vue.component("automator-single-block", {
+  data() {
+    return {
+      b: {}
+    }
+  },
+  props: {
+    block: Object,
+    updateBlock: Function,
+    deleteBlock: Function,
+    lineNumber: Number
+  },
+  mounted() {
+    this.b = this.block
+  },
+  methods: {
+    deleteBlockFromNest(id) {
+      let idx = this.b.nest.findIndex( x => x.id == id)
+      this.b.nest.splice(idx, 1)
+    }
+  },
+  computed: {
+    hasInput() {
+      return this.b.hasInput && ( this.b.targetsWithoutInput ? !this.b.targetsWithoutInput.includes(this.b.target) : true )
+    }
+  },
+  template:
+    `<div>
+      <div class="c-automator-block-row">
+        <div class="o-automator-linenumber">{{ lineNumber + 1 }}</div>
+        <div class="o-automator-command">{{ b.cmd }}</div>
+        <select v-if="b.targets" @change="updateBlock(block, b.id)" v-model="b.target" class="o-automator-block-input">
+          <option v-for="target in b.targets" :value="target">{{ target }}</option>
+        </select>
+        <select v-if="b.secondaryTargets" @change="updateBlock(block, b.id)" v-model="b.secondaryTarget" class="o-automator-block-input">
+          <option v-for="target in b.secondaryTargets" :value="target">{{ target }}</option>
+        </select>
+        <input v-if="hasInput" v-model="b.inputValue" @change="updateBlock(b, b.id)" class="o-automator-block-input"/>
+        <div @click="deleteBlock(b.id)" class="o-automator-block-delete">X</div>
+      </div>
+      <draggable v-if="block.nested" class="l-automator-nested-block" v-model="block.nest" group="code-blocks">
+          <automator-single-block
+            v-for="(block, index) in block.nest" 
+            :key="block.id"
+            :lineNumber="index"
+            :block="block"
+            :updateBlock="updateBlock"
+            :deleteBlock="deleteBlockFromNest"></automator-single-block>
+        </draggable>
+    </div>`
+});
\ No newline at end of file
diff --git a/javascripts/components/reality/automator/automator-tab.js b/javascripts/components/reality/automator/automator-tab.js
new file mode 100644
index 000000000..7a21c2ed6
--- /dev/null
+++ b/javascripts/components/reality/automator/automator-tab.js
@@ -0,0 +1,23 @@
+"use strict";
+
+Vue.component("automator-tab", {
+  computed: {
+    fullScreen() {
+      return this.$viewModel.tabs.reality.automator.fullScreen;
+    },
+    tabClass() {
+      if (!this.fullScreen) return undefined;
+      return ["c-automator-tab--full-screen", "l-automator-tab--full-screen"];
+    },
+    fullScreenIconClass() {
+      return this.fullScreen ? "fa-compress-arrows-alt" : "fa-expand-arrows-alt";
+    }
+  },
+  template: `
+    <div :class="tabClass" class="c-automator-tab l-automator-tab" >
+      <split-pane :min-percent="20" :default-percent="50" split="vertical" class="_-automator-split-pane-fix">
+        <automator-editor slot="paneL" />
+        <automator-docs slot="paneR" />
+      </split-pane>
+    </div>`
+});
diff --git a/javascripts/components/reality/automator/docs/automator-docs-main-page.js b/javascripts/components/reality/automator/docs/automator-docs-main-page.js
new file mode 100644
index 000000000..79bb710c5
--- /dev/null
+++ b/javascripts/components/reality/automator/docs/automator-docs-main-page.js
@@ -0,0 +1,17 @@
+"use strict";
+
+Vue.component("automator-docs-main-page", {
+  computed: {
+    commands: () => GameDatabase.reality.automator.commands
+  },
+  template: `
+    <div class="c-automator-docs-page">
+      <span>Commands:</span>
+      <span
+        v-for="command in commands"
+        class="c-automator-docs-page__link"
+        @click="$emit('select', command.id)"
+      >{{command.keyword}}</span>
+    </div>
+  `
+});
diff --git a/javascripts/components/reality/automator/docs/automator-docs.js b/javascripts/components/reality/automator/docs/automator-docs.js
new file mode 100644
index 000000000..d5d214e48
--- /dev/null
+++ b/javascripts/components/reality/automator/docs/automator-docs.js
@@ -0,0 +1,49 @@
+"use strict";
+
+Vue.component("automator-docs", {
+  data() {
+    return {
+      commandID: -1
+    };
+  },
+  computed: {
+    command() {
+      return GameDatabase.reality.automator.commands[this.commandID];
+    },
+    fullScreen: {
+      get() {
+        return this.$viewModel.tabs.reality.automator.fullScreen;
+      },
+      set(value) {
+        this.$viewModel.tabs.reality.automator.fullScreen = value;
+      }
+    },
+    fullScreenIconClass() {
+      return this.fullScreen ? "fa-compress-arrows-alt" : "fa-expand-arrows-alt";
+    }
+  },
+  methods: {
+    changeCommand(event) {
+      this.commandID = event;
+    }
+  },
+  template: `
+    <div class="l-automator-pane">
+      <div class="c-automator__controls l-automator__controls l-automator-pane__controls" >
+        <automator-button class="fa-long-arrow-alt-left" @click="commandID = -1"/>
+        <automator-button
+          :class="fullScreenIconClass"
+          class="l-automator__button--corner"
+          @click="fullScreen = !fullScreen"
+        />
+      </div>
+      <div class="c-automator-docs l-automator-pane__content">
+        <automator-docs-main-page
+          v-if="command === undefined"
+          @select="changeCommand"
+        />
+        <automator-man-page v-else :command="command" />
+      </div>
+    </div>
+  `
+});
diff --git a/javascripts/components/reality/automator/docs/automator-man-page.js b/javascripts/components/reality/automator/docs/automator-man-page.js
new file mode 100644
index 000000000..efcdc0dfa
--- /dev/null
+++ b/javascripts/components/reality/automator/docs/automator-man-page.js
@@ -0,0 +1,32 @@
+"use strict";
+
+Vue.component("automator-man-page", {
+  props: {
+    command: Object
+  },
+  template: `
+    <div class="c-automator-docs-page">
+      <b>NAME</b>
+      <div class="c-automator-docs-page__indented" v-html="command.name" />
+      <b>SYNTAX</b>
+      <div class="c-automator-docs-page__indented" v-html="command.syntax" />
+      <template v-if="command.description">
+        <b>DESCRIPTION</b>
+        <div class="c-automator-docs-page__indented"v-html="command.description" />
+      </template>
+      <template v-for="section in command.sections">
+        <b>{{section.name}}</b>
+        <template v-for="item in section.items">
+          <div class="c-automator-docs-page__indented">
+            <div v-html="item.header" />
+            <div class="c-automator-docs-page__indented" v-html="item.description" />
+          </div>
+        </template>
+      </template>
+      <template v-if="command.examples">
+        <b>EXAMPLES</b>
+        <div v-for="example in command.examples" class="c-automator-docs-page__indented" v-html="example" />
+      </template>
+    </div>
+  `
+});
diff --git a/javascripts/core/app/ui.init.js b/javascripts/core/app/ui.init.js
index fda75e992..2b2cb764a 100644
--- a/javascripts/core/app/ui.init.js
+++ b/javascripts/core/app/ui.init.js
@@ -38,6 +38,12 @@ let ui = {
         subtab: "",
         openGlyphWeights: false,
         currentGlyphTooltip: -1,
+        automator: {
+          fullScreen: false,
+          editorScriptID: "",
+          // TODO: enum
+          mode: true
+        }
       },
       celestials: {
         subtab: ""
diff --git a/javascripts/core/autobuyer.js b/javascripts/core/autobuyer.js
index 805a9fdd1..f252d96b3 100644
--- a/javascripts/core/autobuyer.js
+++ b/javascripts/core/autobuyer.js
@@ -604,7 +604,7 @@ class InfinityAutobuyerState extends AutobuyerState {
       }
     }
     if (proc) {
-      bigCrunchReset();
+      bigCrunchResetRequest();
     }
     this.resetTicks();
   }
@@ -625,7 +625,7 @@ Autobuyer.unlockables = Autobuyer.allDims
   ]);
 
 Autobuyer.tryUnlockAny = function() {
-  for (let autobuyer of this.unlockables) {
+  for (const autobuyer of this.unlockables) {
     autobuyer.tryUnlock();
   }
 };
diff --git a/javascripts/core/automator.js b/javascripts/core/automator.js
deleted file mode 100644
index d67c68495..000000000
--- a/javascripts/core/automator.js
+++ /dev/null
@@ -1,409 +0,0 @@
-"use strict";
-
-/**
- * 
- * BUY STUDY 11:
- * Buys study
- * also can do BUY STUDYUNTIL X
- * 
- * You can also BUY TTMAX or BUY TTEP 3 or BUY TTAM 4 etc.
- * 
- * 
- * 
- * WAIT EP 1e20:
- * waits untils 1e20 ep
- * possible targets: ep, ip, antimatter, replicanti, rg, seconds
- * replicantigalaxy has a MAX option, which waits until you have as much as you can.
- * 
- * UNLOCK EC 1: you know
- * 
- * START EC 1: duh
- * 
- * CHANGE IPautobuyer 1e20:
- * changes the settings of autobuyers, currently only ip
- * 
- * RESPEC: makes next eternity respec
- * 
- * ETERNITY: does an eternity
- * 
- * STOP: stops the script
- * 
- * LOAD SCRIPT 2: loads the second script
- */
-
- /**
-  * 
-  * The player can use rows equal to Math.ceil(realities^0.5)
-  */
-var automatorRows = []
-var automatorIdx = 0
-var tryingToBuy = 0
-
-function getAutomatorRows() {
-  const realityFactor = Effects.max(0.7, Perk.automatorRowScaling);
-  const realityRows = Math.ceil(Math.pow(player.realities, realityFactor));
-  const perkRows = Effects.sum(
-    Perk.automatorRowIncrease1,
-    Perk.automatorRowIncrease2
-  );
-  return 6 + realityRows + perkRows;
-}
-
-function automatorOnOff() {
-  automatorOn = !automatorOn;
-  automatorIdx = 0
-  if (!automatorOn) {
-    $("#automator")[0].blur()
-  }
-  GameUI.notify.info(automatorOn ? "Automator turned on" : "Automator turned off");
-}
-
-function highlightcurrent() {
-    var row = automatorRows[automatorIdx];
-    var idx = automatorRows.slice(0, automatorIdx).reduce(function (acc, x) {
-        return acc + x.length + 1;
-    }, 0);
-    
-  if (idx >= 0) {
-      $("#automator")[0].focus();
-      $("#automator")[0].setSelectionRange(idx, idx + row.length);
-  }
-}
-
-var automatorOn = false
-var timeStamp = 0
-var buying = false
-function mainIteration() {
-  if (automatorRows[0] === undefined) return false;
-  var cont = false
-  if (automatorRows[automatorIdx][0] == "*") cont = true
-  if (automatorOn) {
-    var row = automatorRows[automatorIdx].split(" ")
-      if (cont) row.splice(0, 1);
-      if (row.length == 1) {
-          var current = {
-              action: row[0]
-          }
-      } else if (row.length == 2) {
-          var current = {
-              action: row[0],
-              target: row[1]
-          }
-      } else if (row.length == 3) {
-          var current = {
-              action: row[0],
-              target: row[1],
-              id: row[2]
-          }          
-      } else if (row.length >= 4) { //added more flexibility to allow for more arguments in automator commands
-          var current = {
-              action: row[0],
-              target: row[1],
-              id: row[2],
-              args: row.slice(3)
-          }
-      }
-    switch(current.action) {
-      case "buy":
-        if (buy(current) || cont) automatorIdx+=1
-        break;
-      case "wait":
-        if (wait(current)) automatorIdx+=1
-        break;
-      case "unlock":
-        if (unlock(current) || cont) automatorIdx+=1
-        break;
-      case "start":
-        if (start(current) || cont) automatorIdx+=1
-        break;
-      case "change":
-        if (change(current) || cont) automatorIdx+=1
-        break;
-      case "respec":
-        if (!player.reality.automatorCommands.has(61)) return false
-        player.respec = true
-        automatorIdx+=1
-        break;
-      case "eternity":
-        if (!player.reality.automatorCommands.has(62)) return false
-        if (eternity(false, true) || cont) automatorIdx+=1
-        break;
-      case "stop":
-        if (!player.reality.automatorCommands.has(72)) return false
-        automatorOn = false
-        $("#automatorOn")[0].checked = false
-        break;
-      case "load":
-        if (!player.reality.automatorCommands.has(51)) return false
-        automatorIdx = 0
-        loadScript(current.id)
-        break;
-      case "toggle":
-        if (!player.reality.automatorCommands.has(53)) return false
-        toggle(current)
-        automatorIdx+=1
-        break;
-      case "goto":
-        if (!player.reality.automatorCommands.has(31)) return false
-        automatorIdx = parseInt(current.target)-1
-        break;
-
-      case "if":
-        if (!player.reality.automatorCommands.has(21)) return false;
-          if (wait(current)) automatorIdx += 1
-          else automatorIdx += 2
-    }
-    
-
-    if (automatorRows.length - 1 < automatorIdx || automatorIdx + 1 > getAutomatorRows() ) automatorIdx = 0 //The player can use rows equal to Math.ceil(realities^0.7) + 6
-    if ( $("#reality").css("display") == "block" && $("#automation").css("display") == "block") highlightcurrent()
-  }
-}
-
-function buy(current) {
-  let id;
-  switch (current.target) {
-    case "study":
-      id = parseInt(current.id)
-      if (TimeStudy(id).isBought) return true;
-      if (TimeStudy(id).purchase()) return true;
-      return false;
-      case "studyuntil":
-          id = parseInt(current.id);
-          if (!TimeStudy(id).isBought) {
-              studiesUntil(id);//passes arguments into the studies until function.
-        return true
-      } else return false
-          break;
-      case "studypath":
-          if (!player.reality.automatorCommands.has(26)) return false;
-          studyPath(current.id, current.args, true);
-          return true;
-          break;
-      case "studyimport":
-          if (!player.reality.automatorCommands.has(36)) return false;
-          importStudyTree(current.id, true);
-          return true;
-          break;
-    case "ttmax":
-      if (!player.reality.automatorCommands.has(44)) return false
-      TimeTheorems.buyMax();
-      return true
-      break;
-    case "ttip":
-      if (!player.reality.automatorCommands.has(35)) return false
-      if (!buying) {
-        buying = true
-        tryingToBuy = 0
-      }
-      if (TimeTheorems.buyWithIP()) tryingToBuy++;
-      if (tryingToBuy == parseInt(current.id)) {
-        buying = false
-        return true
-      }
-      else return false
-      break;
-    case "ttep":
-      if (!player.reality.automatorCommands.has(34)) return false
-      if (!buying) {
-        buying = true
-        tryingToBuy = 0
-      }
-      if (TimeTheorems.buyWithEP()) tryingToBuy++;
-      if (tryingToBuy == parseInt(current.id)) {
-        buying = false
-        return true
-      }
-      else return false
-      break;
-    case "ttam":
-      if (!player.reality.automatorCommands.has(43)) return false
-      if (!buying) {
-        buying = true
-        tryingToBuy = 0
-      }
-      if (TimeTheorems.buyWithAntimatter()) tryingToBuy++;
-      if (tryingToBuy == parseInt(current.id)) {
-        buying = false
-        return true
-      }
-      else return false
-      break;
-    case "ttgen":
-      if (buyDilationUpgrade(10)) return true
-      else return false
-  }
-}
-
-function unlock(current) {
-  if (!player.reality.automatorCommands.has(54)) return false
-  switch(current.target) {
-    case "ec":
-      if (!player.reality.automatorCommands.has(64)) return false
-      if (player.challenge.eternity.unlocked === parseInt(current.id, 10)) return true;
-      return TimeStudy.eternityChallenge(current.id).purchase(true);
-    case "dilation":
-      if (!player.reality.automatorCommands.has(63)) return false
-      if (TimeStudy.dilation.purchase(true)) return true;
-      else return false
-      break;
-  }
-}
-
-function wait(current) {
-  if (!player.reality.automatorCommands.has(11)) return false
-  let id;
-  if (current.id !== "max" && current.target !== "time") id = new Decimal(current.id)
-  switch(current.target) {
-    case "ep":
-      if (!player.reality.automatorCommands.has(23)) return false
-      if (id.gt(player.eternityPoints)) return false
-      else return true
-      break;
-    case "ip":
-      if (!player.reality.automatorCommands.has(32)) return false
-      if (id.gt(player.infinityPoints)) return false
-      else return true
-      break;
-    case "antimatter":
-      if (!player.reality.automatorCommands.has(22)) return false
-      if (id.gt(player.money)) return false
-      else return true
-      break;
-    case "replicanti":
-      if (!player.reality.automatorCommands.has(33)) return false
-      if (id.gt(player.replicanti.amount)) return false
-      else return true
-      break;
-    case "rg":
-      if (!player.reality.automatorCommands.has(42)) return false
-      if (current.id == "max") {
-        if (!player.reality.automatorCommands.has(51)) return false
-        if ((!TimeStudy(131).isBought ? player.replicanti.gal : Math.floor(player.replicanti.gal * 1.5)) == player.replicanti.galaxies) return true
-        else return false
-      }
-      if (id.gt(player.replicanti.galaxies)) return false
-      else return true
-      break;
-    case "time":
-      if (!player.reality.automatorCommands.has(41)) return false
-      if (timeStamp == 0) {
-        timeStamp = new Date().getTime()
-        return false
-      } else {
-        if (timeStamp + current.id * 1000 < new Date().getTime()) {
-          timeStamp = 0 
-          return true
-        }
-        else return false
-      }
-
-      break;
-    case "tt":
-      if (id.gt(player.timestudy.theorem)) return false
-      else return true
-  }
-}
-
-function start(current) {
-  if (!player.reality.automatorCommands.has(73)) return false;
-  let ec;
-  switch (current.target) {
-    case "ec":
-      if (!player.reality.automatorCommands.has(84)) return false;
-      ec = EternityChallenge(current.id);
-      if (ec.isRunning) return true;
-      return ec.start(true);
-    case "dilation":
-      if (!player.reality.automatorCommands.has(83)) return false;
-      return startDilatedEternity(true);
-  }
-}
-
-function change(current) {
-  if (!player.reality.automatorCommands.has(71)) return false
-  switch(current.target) {
-    case "ipautobuyer":
-      Autobuyer.infinity.limit = new Decimal(current.id);
-      return true
-    case "epautobuyer":
-      Autobuyer.eternity.limit = new Decimal(current.id);
-      return true
-  }
-}
-
-function toggle(current) {
-    if (current.target === "rg") { //RG is handled differently
-        replicantiGalaxyAutoToggle(current.id);
-        return true;
-    }
-    let options = Array.range(1, 8)
-      .map(tier => { return { name: `d${tier}`, autobuyer: Autobuyer.dim(tier) }; });
-    options.push({ name: "tickspeed", autobuyer: Autobuyer.tickspeed });
-    options.push({ name: "dimboost", autobuyer: Autobuyer.dimboost });
-    options.push({ name: "galaxy", autobuyer: Autobuyer.galaxy });
-    options.push({ name: "infinity", autobuyer: Autobuyer.infinity });
-    options.push({ name: "sacrifice", autobuyer: Autobuyer.sacrifice });
-    options.push({ name: "eternity", autobuyer: Autobuyer.eternity });
-    let state;
-    let id = options.map(o => o.name).indexOf(current.target);
-    if (id === -1) return false; //Fails if the specified autobuyer doesnt exist
-    const autobuyer = options[id].autobuyer;
-    if (current.id === "on") state = true;
-    else if (current.id === "off") state = false;
-    else state = !autobuyer.isOn;
-    autobuyer.isOn = state;
-    return true;
-}
-
-
-function automatorSaveButton(num, forceSave) {
-  if (shiftDown || forceSave) {
-      localStorage.setItem("automatorScript"+num, JSON.stringify(automatorRows));
-      GameUI.notify.info(`Automator script ${num} saved`);
-  } else {
-    loadScript(num)
-  }
-}
-
-function loadScript(num) {
-  if (localStorage.getItem("automatorScript"+num) !== null && localStorage.getItem("automatorScript"+num) !== "|0") {
-    importAutomatorScript(localStorage.getItem("automatorScript"+num));
-    automatorIdx = 0
-    GameUI.notify.info(`Automator script ${num} loaded`);
-  }
-}
-
-function importAutomatorScript(script) {
-  var outputString = JSON.parse(script).join("\n")
-  document.getElementById("automator").value = outputString
-  updateAutomatorState()
-}
-
-function updateAutomatorState() {
-  automatorRows = $("#automator").val().toLowerCase().split("\n").filter(function(row) { return row !== "" })
-  automatorIdx = 0
-}
-
-function buyAutomatorInstruction(id) {
-  if (!canBuyAutomatorInstruction(id)) return false
-  if (player.reality.automatorCommands.has(id)) return false
-  player.reality.realityMachines = player.reality.realityMachines.minus(Automator.InstructionsById[id].price)
-  player.reality.automatorCommands.add(id)
-  return true
-}
-
-function canBuyAutomatorInstruction(id) {
-  var info = Automator.InstructionsById[id];
-  if (player.reality.realityMachines.lt(info.price)) return false;
-  return info.parent === undefined || player.reality.automatorCommands.has(info.parent);
-}
-
-function updateAutomatorRows() {
-  const pow = Effects.max(0.7, Perk.automatorRowScaling);
-  var rows = 6 + Math.ceil(Math.pow(player.realities, pow))
-  var next = Math.ceil( Math.pow(rows - 6, 1 / pow) )
-  $("#rowsAvailable").text("Your automator can use " + getAutomatorRows() + " rows; next row at " + next + " realities.")
-}
-
-setInterval(mainIteration, 50)
diff --git a/javascripts/core/automator/automator-backend.js b/javascripts/core/automator/automator-backend.js
new file mode 100644
index 000000000..9ac875c7e
--- /dev/null
+++ b/javascripts/core/automator/automator-backend.js
@@ -0,0 +1,374 @@
+"use strict";
+
+/** @abstract */
+class AutomatorCommandInterface {
+  constructor(id) {
+    AutomatorCommandInterface.all[id] = this;
+  }
+
+  /** @abstract */
+  // eslint-disable-next-line no-unused-vars
+  run(command) { throw NotImplementedCrash(); }
+}
+
+AutomatorCommandInterface.all = [];
+
+function AutomatorCommand(id) {
+  return AutomatorCommandInterface.all[id];
+}
+
+const AutomatorCommandStatus = Object.freeze({
+  NEXT_INSTRUCTION: 0,
+  NEXT_TICK_SAME_INSTRUCTION: 1,
+  NEXT_TICK_NEXT_INSTRUCTION: 2,
+  // This is used to handle some special cases, like branches/loops:
+  SAME_INSTRUCTION: 3,
+});
+
+const AutomatorMode = Object.freeze({
+  PAUSE: 1,
+  RUN: 2,
+  SINGLE_STEP: 3,
+});
+
+
+const AutomatorVarTypes = {
+  NUMBER: { id: 0, name: "number" },
+  STUDIES: { id: 1, name: "studies" },
+  DURATION: { id: 2, name: "duration" },
+  UNKNOWN: { id: -1, name: "unknown" },
+};
+
+/**
+ * This object represents a single entry on the execution stack. It's a combination
+ * of transient and persistent values -- we don't store the compiled script or indices
+ * in the player object, but they are part of the stack.
+ */
+class AutomatorStackEntry {
+  constructor(stackIndex) {
+    this._stackIndex = stackIndex;
+    this._commandIndex = 0;
+  }
+
+  // This is used when a new thing is put on the stack (rather than us creating objects
+  // when loading a game)
+  initializeNew(commands) {
+    this._commands = commands;
+    this._commandIndex = 0;
+    this.persistent = {
+      lineNumber: commands[0].lineNumber,
+      commandState: null,
+    };
+  }
+
+  get commandIndex() {
+    return this._commandIndex;
+  }
+
+  set commandIndex(value) {
+    this._commandIndex = value;
+    this.lineNumber = this._commands[value].lineNumber;
+  }
+
+  get lineNumber() {
+    return this.persistent.lineNumber;
+  }
+
+  set lineNumber(value) {
+    this.persistent.lineNumber = value;
+  }
+
+  /**
+  * @returns {object|null} commandState used by commands to track their own data, such as remaining wait time
+  */
+  get commandState() {
+    return this.persistent.commandState;
+  }
+
+  set commandState(value) {
+    this.persistent.commandState = value;
+  }
+
+  get persistent() {
+    return player.reality.automator.state.stack[this._stackIndex];
+  }
+
+  set persistent(value) {
+    player.reality.automator.state.stack[this._stackIndex] = value;
+  }
+
+  get commands() {
+    return this._commands;
+  }
+
+  set commands(value) {
+    this._commands = value;
+  }
+}
+
+class AutomatorScript {
+  constructor(id) {
+    if (!id) throw crash("Invalid script ID");
+    this._id = id;
+    this.compile();
+  }
+
+  get id() {
+    return this._id;
+  }
+
+  get name() {
+    return this.persistent.name;
+  }
+
+  set name(value) {
+    this.persistent.name = value;
+  }
+
+  get persistent() {
+    return player.reality.automator.scripts[this._id];
+  }
+
+  get commands() {
+    return this._compiled;
+  }
+
+  get text() {
+    return this.persistent.content;
+  }
+
+  save(content) {
+    this.persistent.content = content;
+    this.compile();
+  }
+
+  compile() {
+    this._compiled = AutomatorGrammar.compile(this.text).compiled;
+  }
+
+  static create(name) {
+    const id = (++player.reality.automator.lastID).toString();
+    player.reality.automator.scripts[id] = {
+      id,
+      name,
+      content: "",
+    };
+    return new AutomatorScript(id);
+  }
+}
+
+const AutomatorBackend = {
+  MAX_COMMANDS_PER_UPDATE: 100,
+  _scripts: [],
+
+  get state() {
+    return player.reality.automator.state;
+  },
+
+  // The automator may be paused at some instruction, but still be on.
+  get isOn() {
+    return !this.stack.isEmpty;
+  },
+
+  /**
+  * @returns {AutomatorMode}
+  */
+  get mode() {
+    return this.state.mode;
+  },
+
+  set mode(value) {
+    this.state.mode = value;
+  },
+
+  get isRunning() {
+    return this.isOn && this.mode === AutomatorMode.RUN;
+  },
+
+  update() {
+    if (!this.isOn) return;
+    switch (this.mode) {
+      case AutomatorMode.PAUSE:
+        return;
+      case AutomatorMode.SINGLE_STEP:
+        this.step();
+        this.state.mode = AutomatorMode.PAUSE;
+        return;
+      case AutomatorMode.RUN:
+        break;
+      default:
+        this.stop();
+        return;
+    }
+    for (let count = 0; count < AutomatorBackend.MAX_COMMANDS_PER_UPDATE && this.isRunning; ++count) {
+      if (!this.step()) break;
+    }
+  },
+
+  step() {
+    if (this.stack.isEmpty) return false;
+    switch (this.runCurrentCommand()) {
+      case AutomatorCommandStatus.SAME_INSTRUCTION:
+        return true;
+      case AutomatorCommandStatus.NEXT_INSTRUCTION:
+        return this.nextCommand();
+      case AutomatorCommandStatus.NEXT_TICK_SAME_INSTRUCTION:
+        return false;
+      case AutomatorCommandStatus.NEXT_TICK_NEXT_INSTRUCTION:
+        this.nextCommand();
+        return false;
+    }
+    throw crash("Unrecognized return code from command");
+  },
+
+  runCurrentCommand() {
+    const S = this.stack.top;
+    const cmdState = S.commands[S.commandIndex].run(S);
+    return cmdState;
+  },
+
+  nextCommand() {
+    const S = this.stack.top;
+    if (S.commandIndex >= S.commands.length - 1) {
+      this.stack.pop();
+      if (this.stack.isEmpty) {
+        // With the debug output on, running short scripts gets very spammy, working around that
+        // return false here makes sure that a single instruction script executes one tick at a time
+        if (this.state.repeat) {
+          this.start(this.state.topLevelScript, AutomatorMode.RUN, false);
+          return false;
+        }
+        this.stop();
+      }
+    } else {
+      S.commandState = null;
+      ++S.commandIndex;
+    }
+    return true;
+  },
+
+  push(commands) {
+    // We do not allow empty scripts on the stack.
+    if (commands.length === 0) return;
+    this.stack.push(commands);
+  },
+
+  findScript(id) {
+    return this._scripts.find(e => e.id === id);
+  },
+
+  initializeFromSave() {
+    const scriptIds = Object.keys(player.reality.automator.scripts);
+    if (scriptIds.length === 0) {
+      const defaultScript = AutomatorScript.create("Untitled");
+      this._scripts = [defaultScript];
+      scriptIds.push(defaultScript.id);
+    } else {
+      this._scripts = scriptIds.map(s => new AutomatorScript(s));
+    }
+    if (!scriptIds.includes(this.state.topLevelScript)) this.state.topLevelScript = scriptIds[0];
+    const currentScript = this._scripts.find(e => e.id === this.state.topLevelScript);
+    if (currentScript.commands) {
+      const commands = currentScript.commands;
+      if (!this.stack.initializeFromSave(commands)) this.reset(commands);
+    }
+  },
+
+  saveScript(id, data) {
+    this.findScript(id).save(data);
+    if (id === this.state.topLevelScript) this.stop();
+  },
+
+  newScript() {
+    const newScript = AutomatorScript.create("Untitled");
+    this._scripts.push(newScript);
+    return newScript;
+  },
+
+  toggleRepeat() {
+    this.state.repeat = !this.state.repeat;
+  },
+
+  reset(commands) {
+    this.stack.clear();
+    this.push(commands);
+  },
+
+  stop() {
+    this.stack.clear();
+    this.state.mode = AutomatorMode.PAUSE;
+  },
+
+  pause() {
+    this.state.mode = AutomatorMode.PAUSE;
+  },
+
+  start(scriptID = this.state.topLevelScript, initialMode = AutomatorMode.RUN, compile = true) {
+    this.state.topLevelScript = scriptID;
+    const scriptObject = this._scripts.find(s => s.id === scriptID);
+    if (compile) scriptObject.compile();
+    if (scriptObject.commands) {
+      this.reset(scriptObject.commands);
+      this.state.mode = initialMode;
+    }
+  },
+
+  restart() {
+    if (this.stack.isEmpty) return;
+    this.reset(this.stack._data[0].commands);
+  },
+
+  stack: {
+    _data: [],
+    push(commands) {
+      const newEntry = new AutomatorStackEntry(this.length);
+      newEntry.initializeNew(commands);
+      this._data.push(newEntry);
+    },
+    pop() {
+      if (this._data.length === 0) return;
+      player.reality.automator.state.stack.pop();
+      this._data.pop();
+    },
+    clear() {
+      this._data = [];
+      player.reality.automator.state.stack.length = 0;
+    },
+    initializeFromSave(commands) {
+      this._data = [];
+      const playerStack = player.reality.automator.state.stack;
+      let currentCommands = commands;
+      for (let depth = 0; depth < playerStack.length; ++depth) {
+        const playerEntry = playerStack[depth];
+        const newEntry = new AutomatorStackEntry(depth);
+        newEntry.commands = currentCommands;
+        const foundIndex = currentCommands.findIndex(e => e.lineNumber === playerEntry.lineNumber);
+        if (foundIndex === -1) {
+          // Could not match stack state to script, have to reset automato
+          return false;
+        }
+        newEntry.commandIndex = foundIndex;
+        this._data.push(newEntry);
+        // Are we inside a code block?
+        if (depth !== playerStack.length - 1) {
+          if (currentCommands[foundIndex].blockCommands === undefined) {
+            return false;
+          }
+          currentCommands = currentCommands[foundIndex].blockCommands;
+        }
+      }
+      return true;
+    },
+    get top() {
+      return this._data[this.length - 1];
+    },
+    get length() {
+      if (this._data.length !== player.reality.automator.state.stack.length) throw crash("inconsistent stack length");
+      return this._data.length;
+    },
+    get isEmpty() {
+      return this._data.length === 0;
+    }
+  },
+
+};
diff --git a/javascripts/core/automator/automator-codemirror.js b/javascripts/core/automator/automator-codemirror.js
new file mode 100644
index 000000000..0b797e7fe
--- /dev/null
+++ b/javascripts/core/automator/automator-codemirror.js
@@ -0,0 +1,97 @@
+"use strict";
+
+(function() {
+  function walkSuggestion(suggestion, prefix, output) {
+    if (suggestion.$autocomplete &&
+      suggestion.$autocomplete.startsWith(prefix) && suggestion.$autocomplete !== prefix) {
+      output.add(suggestion.$autocomplete);
+    }
+    for (const s of suggestion.categoryMatches) {
+      walkSuggestion(AutomatorLexer.tokenIds[s], prefix, output);
+    }
+  }
+
+  // eslint-disable-next-line no-unused-vars
+  CodeMirror.registerHelper("lint", "automato", (contents, _, editor) => {
+    const doc = editor.getDoc();
+    const errors = AutomatorGrammar.compile(contents, true).errors;
+    return errors.map(e => ({
+      message: e.info,
+      severity: "error",
+      from: doc.posFromIndex(e.startOffset),
+      to: doc.posFromIndex(e.endOffset + 1),
+    }));
+  });
+
+  CodeMirror.registerHelper("hint", "anyword", editor => {
+    const cursor = editor.getDoc().getCursor();
+    let start = cursor.ch;
+    const end = cursor.ch;
+    const line = editor.getLine(cursor.line);
+    while (start && /\w/u.test(line.charAt(start - 1)))--start;
+    const lineStart = line.slice(0, start);
+    const currentPrefix = line.slice(start, end);
+    const lineLex = AutomatorLexer.lexer.tokenize(lineStart);
+    if (lineLex.errors.length > 0) return undefined;
+    const rawSuggestions = AutomatorGrammar.parser.computeContentAssist("command", lineLex.tokens);
+    const suggestions = new Set();
+    for (const s of rawSuggestions) {
+      if (s.ruleStack[1] === "badCommand") continue;
+      walkSuggestion(s.nextTokenType, currentPrefix, suggestions);
+    }
+    return {
+      list: Array.from(suggestions),
+      from: CodeMirror.Pos(cursor.line, start),
+      to: CodeMirror.Pos(cursor.line, end)
+    };
+  });
+
+  const commentRule = { regex: /(\/\/|#).*/u, token: "comment", next: "start" };
+
+  CodeMirror.defineSimpleMode("automato", {
+    // The start state contains the rules that are intially used
+    start: [
+      commentRule,
+      {
+        regex: /auto\s|define\s|if\s|pause\s|start\s|studies\s|tt\s|time theorems\s|unlock\s|until\s|wait\s|while\s|black[ \t]+hole\s|stored?[ \t]time\s/ui,
+        token: "keyword",
+        next: "commandArgs"
+      },
+      { regex: /infinity\S+|eternity\S+|reality\S+|pause\S+|restart\S+/ui, token: "error", next: "commandDone" },
+      { regex: /infinity|eternity|reality|pause|restart/ui, token: "keyword", next: "commandDone" },
+      { regex: /\}/ui, dedent: true },
+      { regex: /\S+\s/ui, token: "error", next: "commandDone" },
+    ],
+    commandDone: [
+      commentRule,
+      { sol: true, next: "start" },
+      // This seems necessary to have a closing curly brace de-indent automatically in some cases
+      { regex: /\}/ui, dedent: true },
+      { regex: /\S+/ui, token: "error" },
+    ],
+    commandArgs: [
+      commentRule,
+      { sol: true, next: "start" },
+      { regex: /<=|>=|<|>/ui, token: "operator" },
+      { regex: /on(\s|$)|off(\s|$)|dilation(\s|$)|load(\s|$)|respec(\s|$)|nowait(\s|$)/ui, token: "variable-2" },
+      { regex: /preset(\s|$)|infinity(\s|$)|eternity(\s|$)|reality(\s|$)|use(\s|$)/ui, token: "variable-2" },
+      { regex: /am|ip|ep|tt|sec(onds?)?|min(utes?)?|hours?/ui, token: "attribute" },
+      { regex: /([0-9]+:[0-5][0-9]:[0-5][0-9]|[0-5]?[0-9]:[0-5][0-9])/ui, token: "number" },
+      { regex: /-?(0|[1-9]\d*)(\.\d+)?([eE][+-]?\d+)?\s/ui, token: "number" },
+      { regex: /-?(0|[1-9]\d*)(\.\d+)?([eE][+-]?\d+)?/ui, token: "number" },
+      { regex: /\{/ui, indent: true, next: "commandDone" },
+      // This seems necessary to have a closing curly brace de-indent automatically in some cases
+      { regex: /\}/ui, dedent: true },
+    ],
+
+    // The meta property contains global information about the mode. It
+    // can contain properties like lineComment, which are supported by
+    // all modes, and also directives like dontIndentStates, which are
+    // specific to simple modes.
+    meta: {
+      lineComment: "//",
+      electricChars: "}",
+    }
+  });
+
+}());
diff --git a/javascripts/core/automator/automator-commands.js b/javascripts/core/automator/automator-commands.js
new file mode 100644
index 000000000..f5430322e
--- /dev/null
+++ b/javascripts/core/automator/automator-commands.js
@@ -0,0 +1,545 @@
+"use strict";
+
+/**
+ * Note: the $ shorthand for the parser object is required by Chevrotain. Don't mess with it.
+ */
+
+const AutomatorCommands = ((() => {
+  const T = AutomatorLexer.tokenMap;
+  // The splitter tries to get a number 1 through 6, or anything else. Note: eslint complains
+  // about lack of u flag here for some reason.
+  // eslint-disable-next-line require-unicode-regexp
+  const presetSplitter = new RegExp(/preset[ \t]+(?:([1-6]$)|(.+$))/ui);
+
+  function prestigeNotify(flag) {
+    if (!AutomatorBackend.isOn) return;
+    const state = AutomatorBackend.stack.top.commandState;
+    if (state && state.prestigeLevel !== undefined) {
+      state.prestigeLevel = Math.max(state.prestigeLevel, flag);
+    }
+  }
+
+  EventHub.logic.on(GameEvent.BIG_CRUNCH_AFTER, () => prestigeNotify(T.Infinity.$prestigeLevel));
+  EventHub.logic.on(GameEvent.ETERNITY_RESET_AFTER, () => prestigeNotify(T.Eternity.$prestigeLevel));
+  EventHub.logic.on(GameEvent.REALITY_RESET_AFTER, () => prestigeNotify(T.Reality.$prestigeLevel));
+
+  // Used by while and until
+  function compileConditionLoop(evalComparison, commands) {
+    return {
+      run: () => {
+        if (!evalComparison()) return AutomatorCommandStatus.NEXT_TICK_NEXT_INSTRUCTION;
+        AutomatorBackend.push(commands);
+        return AutomatorCommandStatus.SAME_INSTRUCTION;
+      },
+      blockCommands: commands,
+    };
+  }
+
+  return [
+    {
+      id: "auto",
+      rule: $ => () => {
+        $.CONSUME(T.Auto);
+        $.CONSUME(T.PrestigeEvent);
+        $.OR([
+          { ALT: () => $.CONSUME(T.On) },
+          { ALT: () => $.CONSUME(T.Off) },
+          { ALT: () => $.SUBRULE($.duration) },
+        ]);
+      },
+      validate: (ctx, V) => {
+        ctx.startLine = ctx.Auto[0].startLine;
+        if (ctx.PrestigeEvent && ctx.PrestigeEvent[0].tokenType === T.Reality && ctx.duration) {
+          V.addError(ctx.duration[0], "auto reality cannot be set to a duration");
+          return false;
+        }
+        return true;
+      },
+      compile: ctx => {
+        const on = Boolean(ctx.On || ctx.duration);
+        const duration = ctx.duration ? ctx.duration[0].children.$value : undefined;
+        const durationMode = ctx.PrestigeEvent[0].tokenType.$autobuyerDurationMode;
+        const autobuyer = ctx.PrestigeEvent[0].tokenType.$autobuyer;
+        return () => {
+          autobuyer.isOn = on;
+          if (duration !== undefined) {
+            autobuyer.mode = durationMode;
+            autobuyer.limit = new Decimal(1e-3 * duration);
+          }
+          return AutomatorCommandStatus.NEXT_INSTRUCTION;
+        };
+      },
+    },
+    {
+      id: "blackHole",
+      rule: $ => () => {
+        $.CONSUME(T.BlackHole);
+        $.OR([
+          { ALT: () => $.CONSUME(T.On) },
+          { ALT: () => $.CONSUME(T.Off) },
+        ]);
+      },
+      validate: (ctx, V) => {
+        ctx.startLine = ctx.BlackHole[0].startLine;
+        if (!BlackHole(1).isUnlocked) {
+          V.addError(ctx.BlackHole[0], "black hole is not unlocked");
+          return false;
+        }
+        return true;
+      },
+      compile: ctx => {
+        const on = Boolean(ctx.On);
+        return () => {
+          if (on === BlackHoles.arePaused) BlackHoles.togglePause();
+          return AutomatorCommandStatus.NEXT_INSTRUCTION;
+        };
+      },
+    },
+    {
+      id: "define",
+      rule: $ => () => {
+        $.CONSUME(T.Define);
+        $.CONSUME(T.Identifier);
+        $.CONSUME(T.EqualSign);
+        $.OR([
+          { ALT: () => $.SUBRULE($.duration) },
+          { ALT: () => $.SUBRULE($.studyList) },
+        ]);
+      },
+      validate: (ctx, V) => {
+        ctx.startLine = ctx.Define[0].startLine;
+        if (!ctx.Identifier || ctx.Identifier[0].isInsertedInRecovery || ctx.Identifier[0].image === "") {
+          V.addError(ctx.Define, "missing variable name");
+          return false;
+        }
+        return true;
+      },
+      // Since define creates constants, they are all resolved at compile. The actual define instruction
+      // doesn't have to do anything.
+      compile: () => () => AutomatorCommandStatus.NEXT_INSTRUCTION,
+    },
+    {
+      id: "ifBlock",
+      rule: $ => () => {
+        $.CONSUME(T.If);
+        $.SUBRULE($.comparison);
+        $.CONSUME(T.LCurly);
+        $.CONSUME(T.EOL);
+        $.SUBRULE($.block);
+        $.CONSUME(T.RCurly);
+      },
+      validate: (ctx, V) => {
+        ctx.startLine = ctx.If[0].startLine;
+        return V.checkBlock(ctx, ctx.If);
+      },
+      compile: (ctx, C) => {
+        const evalComparison = C.visit(ctx.comparison);
+        const commands = C.visit(ctx.block);
+        return {
+          run: S => {
+            // We avoid running the same if condition twice by creating an empty object
+            // on the stack.
+            if (S.commandState !== null) return AutomatorCommandStatus.NEXT_INSTRUCTION;
+            S.commandState = {};
+            if (!evalComparison()) return AutomatorCommandStatus.NEXT_INSTRUCTION;
+            AutomatorBackend.push(commands);
+            return AutomatorCommandStatus.SAME_INSTRUCTION;
+          },
+          blockCommands: commands,
+        };
+      }
+    },
+    {
+      // Note: this has to appear before pause
+      id: "pauseTime",
+      rule: $ => () => {
+        $.CONSUME(T.Pause);
+        $.OR([
+          { ALT: () => $.SUBRULE($.duration) },
+          { ALT: () => $.CONSUME(T.Identifier) },
+        ]);
+      },
+      validate: (ctx, V) => {
+        ctx.startLine = ctx.Pause[0].startLine;
+        ctx.$duration = ctx.Identifier
+          ? V.lookupVar(ctx.Identifier[0], AutomatorVarTypes.DURATION).value
+          : V.visit(ctx.duration);
+        return ctx.$duration !== undefined;
+      },
+      compile: ctx => {
+        const duration = ctx.$duration;
+        return S => {
+          if (S.commandState === null) {
+            S.commandState = { timeMs: 0 };
+          } else {
+            S.commandState.timeMs += Time.unscaledDeltaTime.milliseconds;
+          }
+          return S.commandState.timeMs >= duration
+            ? AutomatorCommandStatus.NEXT_INSTRUCTION
+            : AutomatorCommandStatus.NEXT_TICK_SAME_INSTRUCTION;
+        };
+      }
+    },
+    {
+      id: "pause",
+      rule: $ => () => {
+        $.CONSUME(T.Pause);
+      },
+      validate: ctx => {
+        ctx.startLine = ctx.Pause[0].startLine;
+        return true;
+      },
+      compile: () => () => {
+        AutomatorBackend.pause();
+        return AutomatorCommandStatus.NEXT_INSTRUCTION;
+      },
+    },
+    {
+      id: "prestige",
+      rule: $ => () => {
+        $.CONSUME(T.PrestigeEvent);
+        $.OPTION(() => $.CONSUME(T.Nowait));
+      },
+      validate: ctx => {
+        ctx.startLine = ctx.PrestigeEvent[0].startLine;
+        return true;
+      },
+      compile: ctx => {
+        const nowait = ctx.Nowait !== undefined;
+        const prestigeToken = ctx.PrestigeEvent[0].tokenType;
+        return () => {
+          const available = prestigeToken.$prestigeAvailable();
+          if (!available) {
+            return nowait
+              ? AutomatorCommandStatus.NEXT_INSTRUCTION
+              : AutomatorCommandStatus.NEXT_TICK_SAME_INSTRUCTION;
+          }
+          prestigeToken.$prestige();
+          return AutomatorCommandStatus.NEXT_TICK_NEXT_INSTRUCTION;
+        };
+      }
+    },
+    {
+      id: "startDilation",
+      rule: $ => () => {
+        $.CONSUME(T.Start);
+        $.CONSUME(T.Dilation);
+      },
+      validate: ctx => {
+        ctx.startLine = ctx.Start[0].startLine;
+        return true;
+      },
+      compile: () => () => {
+        if (player.dilation.active) return AutomatorCommandStatus.NEXT_INSTRUCTION;
+        if (startDilatedEternity(true)) return AutomatorCommandStatus.NEXT_TICK_NEXT_INSTRUCTION;
+        return AutomatorCommandStatus.NEXT_TICK_SAME_INSTRUCTION;
+      }
+    },
+    {
+      id: "startEC",
+      rule: $ => () => {
+        $.CONSUME(T.Start);
+        $.SUBRULE($.eternityChallenge);
+      },
+      validate: ctx => {
+        ctx.startLine = ctx.Start[0].startLine;
+        return true;
+      },
+      compile: ctx => {
+        const ecNumber = ctx.eternityChallenge[0].children.$ecNumber;
+        return () => {
+          const ec = EternityChallenge(ecNumber);
+          if (ec.isRunning) return AutomatorCommandStatus.NEXT_INSTRUCTION;
+          if (!EternityChallenge(ecNumber).isUnlocked) {
+            if (!TimeStudy.eternityChallenge(ecNumber).purchase(true)) {
+              return AutomatorCommandStatus.NEXT_TICK_SAME_INSTRUCTION;
+            }
+          }
+          if (ec.start(true)) return AutomatorCommandStatus.NEXT_TICK_NEXT_INSTRUCTION;
+          return AutomatorCommandStatus.NEXT_TICK_SAME_INSTRUCTION;
+        };
+      }
+    },
+    {
+      id: "storeTime",
+      rule: $ => () => {
+        $.CONSUME(T.StoreTime);
+        $.OR([
+          { ALT: () => $.CONSUME(T.On) },
+          { ALT: () => $.CONSUME(T.Off) },
+          { ALT: () => $.CONSUME(T.Use) },
+        ]);
+      },
+      validate: (ctx, V) => {
+        ctx.startLine = ctx.StoreTime[0].startLine;
+        if (!Enslaved.isUnlocked) {
+          V.addError(ctx.StoreTime[0], "Enslaved is not unlocked");
+          return false;
+        }
+        return true;
+      },
+      compile: ctx => {
+        if (ctx.Use) return () => {
+          Enslaved.useStoredTime();
+          return AutomatorCommandStatus.NEXT_INSTRUCTION;
+        };
+        const on = Boolean(ctx.On);
+        return () => {
+          if (on !== player.celestials.enslaved.isStoring) Enslaved.toggleStoreBlackHole();
+          return AutomatorCommandStatus.NEXT_INSTRUCTION;
+        };
+      },
+    },
+    {
+      id: "studiesBuy",
+      rule: $ => () => {
+        $.CONSUME(T.Studies);
+        $.OPTION(() => $.CONSUME(T.Nowait));
+        $.OR([
+          { ALT: () => $.SUBRULE($.studyList) },
+          { ALT: () => $.CONSUME1(T.Identifier) },
+        ]);
+      },
+      validate: (ctx, V) => {
+        ctx.startLine = ctx.Studies[0].startLine;
+        if (ctx.Identifier) {
+          const varInfo = V.lookupVar(ctx.Identifier[0], AutomatorVarTypes.STUDIES);
+          if (!varInfo) return;
+          ctx.$studies = varInfo.value;
+        } else if (ctx.studyList) {
+          ctx.$studies = V.visit(ctx.studyList);
+        }
+      },
+      compile: ctx => {
+        const studies = ctx.$studies;
+        if (ctx.Nowait === undefined) return () => {
+          for (const tsNumber of studies.normal) {
+            if (TimeStudy(tsNumber).isBought) continue;
+            if (!TimeStudy(tsNumber).purchase()) {
+              if (tsNumber === 201 && DilationUpgrade.timeStudySplit.isBought) continue;
+              return AutomatorCommandStatus.NEXT_TICK_SAME_INSTRUCTION;
+            }
+          }
+          if (!studies.ec || TimeStudy.eternityChallenge(studies.ec).isBought) {
+            return AutomatorCommandStatus.NEXT_INSTRUCTION;
+          }
+          return TimeStudy.eternityChallenge(studies.ec).purchase(true)
+            ? AutomatorCommandStatus.NEXT_INSTRUCTION
+            : AutomatorCommandStatus.NEXT_TICK_SAME_INSTRUCTION;
+        };
+        return () => {
+          for (const tsNumber of studies.normal) TimeStudy(tsNumber).purchase();
+          if (!studies.ec || TimeStudy.eternityChallenge(studies.ec).isBought) {
+            return AutomatorCommandStatus.NEXT_INSTRUCTION;
+          }
+          TimeStudy.eternityChallenge(studies.ec).purchase(true);
+          return AutomatorCommandStatus.NEXT_INSTRUCTION;
+        };
+      },
+    },
+    {
+      id: "studiesLoad",
+      rule: $ => () => {
+        $.CONSUME(T.Studies);
+        $.CONSUME(T.Load);
+        $.CONSUME(T.Preset);
+      },
+      validate: (ctx, V) => {
+        ctx.startLine = ctx.Studies[0].startLine;
+        if (!ctx.Preset || ctx.Preset[0].isInsertedInRecovery || ctx.Preset[0].image === "") {
+          V.addError(ctx, "Missing preset and preset name");
+          return false;
+        }
+        const split = presetSplitter.exec(ctx.Preset[0].image);
+        if (!split) {
+          V.addError(ctx.Preset[0], "Missing preset name or number");
+          return false;
+        }
+        ctx.Preset[0].splitPresetResult = split;
+        let presetIndex;
+        if (split[2]) {
+          // We don't need to do any verification if it's a number; if it's a name, we
+          // check to make sure it exists:
+          presetIndex = player.timestudy.presets.findIndex(e => e.name === split[2]) + 1;
+          if (presetIndex === 0) {
+            V.addError(ctx.Preset[0], `Could not find preset named ${split[2]} (note: names are case sensitive)`);
+            return false;
+          }
+        } else {
+          presetIndex = parseInt(split[1], 10);
+        }
+        ctx.$presetIndex = presetIndex;
+        return true;
+      },
+      compile: ctx => {
+        const presetIndex = ctx.$presetIndex;
+        return () => {
+          importStudyTree(player.timestudy.presets[presetIndex - 1].studies);
+          return AutomatorCommandStatus.NEXT_INSTRUCTION;
+        };
+      }
+    },
+    {
+      id: "studiesRespec",
+      rule: $ => () => {
+        $.CONSUME(T.Studies);
+        $.CONSUME(T.Respec);
+      },
+      validate: ctx => {
+        ctx.startLine = ctx.Studies[0].startLine;
+        return true;
+      },
+      compile: () => () => {
+        player.respec = true;
+        return AutomatorCommandStatus.NEXT_INSTRUCTION;
+      }
+    },
+    {
+      id: "tt",
+      rule: $ => () => {
+        $.OPTION(() => $.CONSUME(T.Buy));
+        $.CONSUME(T.TT);
+        $.CONSUME(T.TTCurrency);
+      },
+      validate: ctx => {
+        ctx.startLine = (ctx.Buy || ctx.TT)[0].startLine;
+        return true;
+      },
+      compile: ctx => {
+        const buyFunction = ctx.TTCurrency[0].tokenType.$buyTT;
+        return () => (buyFunction()
+          ? AutomatorCommandStatus.NEXT_INSTRUCTION
+          : AutomatorCommandStatus.NEXT_TICK_NEXT_INSTRUCTION);
+      }
+    },
+    {
+      id: "unlockDilation",
+      rule: $ => () => {
+        $.CONSUME(T.Unlock);
+        $.CONSUME(T.Dilation);
+      },
+      validate: ctx => {
+        ctx.startLine = ctx.Unlock[0].startLine;
+        return true;
+      },
+      compile: () => () => {
+        if (TimeStudy.dilation.isBought) return AutomatorCommandStatus.NEXT_INSTRUCTION;
+        return TimeStudy.dilation.purchase(true)
+          ? AutomatorCommandStatus.NEXT_INSTRUCTION
+          : AutomatorCommandStatus.NEXT_TICK_SAME_INSTRUCTION;
+      }
+    },
+    {
+      id: "unlockEC",
+      rule: $ => () => {
+        $.CONSUME(T.Unlock);
+        $.SUBRULE($.eternityChallenge);
+      },
+      validate: ctx => {
+        ctx.startLine = ctx.Unlock[0].startLine;
+        return true;
+      },
+      compile: ctx => {
+        const ecNumber = ctx.eternityChallenge[0].children.$ecNumber;
+        return () => {
+          if (EternityChallenge(ecNumber).isUnlocked) return AutomatorCommandStatus.NEXT_INSTRUCTION;
+          return TimeStudy.eternityChallenge(ecNumber).purchase(true)
+            ? AutomatorCommandStatus.NEXT_INSTRUCTION
+            : AutomatorCommandStatus.NEXT_TICK_SAME_INSTRUCTION;
+        };
+      }
+    },
+    {
+      id: "untilLoop",
+      rule: $ => () => {
+        $.CONSUME(T.Until);
+        $.OR([
+          { ALT: () => $.SUBRULE($.comparison) },
+          { ALT: () => $.CONSUME(T.PrestigeEvent) },
+        ]);
+        $.CONSUME(T.LCurly);
+        $.CONSUME(T.EOL);
+        $.SUBRULE($.block);
+        $.CONSUME(T.RCurly);
+      },
+      validate: (ctx, V) => {
+        ctx.startLine = ctx.Until[0].startLine;
+        return V.checkBlock(ctx, ctx.Until);
+      },
+      compile: (ctx, C) => {
+        const commands = C.visit(ctx.block);
+        if (ctx.comparison) {
+          const evalComparison = C.visit(ctx.comparison);
+          return compileConditionLoop(() => !evalComparison(), commands);
+        }
+        const prestigeLevel = ctx.PrestigeEvent[0].tokenType.$prestigeLevel;
+        return {
+          run: S => {
+            if (S.commandState === null) {
+              S.commandState = { prestigeLevel: 0 };
+            }
+            if (S.commandState.prestigeLevel >= prestigeLevel) return AutomatorCommandStatus.NEXT_INSTRUCTION;
+            AutomatorBackend.push(commands);
+            return AutomatorCommandStatus.SAME_INSTRUCTION;
+          },
+          blockCommands: commands
+        };
+      }
+    },
+    {
+      id: "waitCondition",
+      rule: $ => () => {
+        $.CONSUME(T.Wait);
+        $.SUBRULE($.comparison);
+      },
+      validate: ctx => {
+        ctx.startLine = ctx.Wait[0].startLine;
+        return true;
+      },
+      compile: (ctx, C) => {
+        const evalComparison = C.visit(ctx.comparison);
+        return () => (evalComparison()
+          ? AutomatorCommandStatus.NEXT_INSTRUCTION
+          : AutomatorCommandStatus.NEXT_TICK_SAME_INSTRUCTION);
+      }
+    },
+    {
+      id: "waitEvent",
+      rule: $ => () => {
+        $.CONSUME(T.Wait);
+        $.CONSUME(T.PrestigeEvent);
+      },
+      validate: ctx => {
+        ctx.startLine = ctx.Wait[0].startLine;
+        return true;
+      },
+      compile: ctx => {
+        const prestigeLevel = ctx.PrestigeEvent[0].tokenType.$prestigeLevel;
+        return S => {
+          if (S.commandState === null) {
+            S.commandState = { prestigeLevel: 0 };
+          }
+          return S.commandState.prestigeLevel >= prestigeLevel
+            ? AutomatorCommandStatus.NEXT_INSTRUCTION
+            : AutomatorCommandStatus.NEXT_TICK_SAME_INSTRUCTION;
+        };
+      }
+    },
+    {
+      id: "whileLoop",
+      rule: $ => () => {
+        $.CONSUME(T.While);
+        $.SUBRULE($.comparison);
+        $.CONSUME(T.LCurly);
+        $.CONSUME(T.EOL);
+        $.SUBRULE($.block);
+        $.CONSUME(T.RCurly);
+      },
+      validate: (ctx, V) => {
+        ctx.startLine = ctx.While[0].startLine;
+        return V.checkBlock(ctx, ctx.While);
+      },
+      compile: (ctx, C) => compileConditionLoop(C.visit(ctx.comparison), C.visit(ctx.block)),
+    },
+  ];
+})());
\ No newline at end of file
diff --git a/javascripts/core/automator/compiler.js b/javascripts/core/automator/compiler.js
new file mode 100644
index 000000000..3187cee89
--- /dev/null
+++ b/javascripts/core/automator/compiler.js
@@ -0,0 +1,378 @@
+"use strict";
+
+(function() {
+  if (AutomatorGrammar === undefined) {
+    throw crash("AutomatorGrammar must be defined here");
+  }
+
+  const parser = AutomatorGrammar.parser;
+  const BaseVisitor = parser.getBaseCstVisitorConstructorWithDefaults();
+
+  class Validator extends BaseVisitor {
+    constructor() {
+      super();
+      this.validateVisitor();
+      this.reset();
+      // Commands can provide validation hooks; we might also have some here
+      for (const cmd of AutomatorCommands) {
+        if (!cmd.validate) continue;
+        const ownMethod = this[cmd.id];
+        this[cmd.id] = ctx => {
+          if (!cmd.validate(ctx, this)) return;
+          if (ownMethod) ownMethod.call(this, ctx);
+        };
+      }
+    }
+
+    addLexerErrors(errors, input) {
+      for (const err of errors) {
+        this.errors.push({
+          startOffset: err.offset,
+          endOffset: err.offset + err.length,
+          info: `Unexpected characters "${input.substr(err.offset, err.length)}"`,
+        });
+      }
+    }
+
+    addParserErrors(errors, tokens) {
+      for (const parseError of errors) {
+        let err = Validator.combinePositionRanges(
+          Validator.getPositionRange(parseError.previousToken),
+          Validator.getPositionRange(parseError.token));
+        // In some cases, at the end of the script we don't get any useful tokens out of the parse error
+        if (parseError.token.tokenType.name === "EOF" && parseError.previousToken.tokenType.name === "EOF") {
+          err = Validator.combinePositionRanges(err, Validator.getPositionRange(tokens[tokens.length - 1]));
+        }
+        // Deal with literal EOL in error message:
+        err.info = parseError.message.replace(/'\n\s*'/ui, "End of line");
+        const isEndToken = parseError.token.tokenType.name === "EOF" || parseError.token.tokenType.name === "EOL";
+        if (parseError.name === "NoViableAltException") {
+          if (!isEndToken) {
+            err.info = `Unexpected input ${parseError.token.image}`;
+          }
+        } else if (parseError.name === "EarlyExitException") {
+          err.info = "Unexpected end of command";
+        }
+        this.errors.push(err);
+      }
+    }
+
+    static combinePositionRanges(r1, r2) {
+      return {
+        startOffset: Math.min(r1.startOffset, r2.startOffset),
+        endOffset: Math.max(r1.endOffset, r2.endOffset),
+      };
+    }
+
+    // Chevrotain doesn't provide position ranges for higher level grammar constructs yet
+    // We have to recursively figure out the range so we can highlight an error
+    static getPositionRange(ctx) {
+      let pos = {
+        startOffset: Number.MAX_VALUE,
+        endOffset: 0,
+      };
+      if (ctx === undefined || ctx === null) return pos;
+      if (ctx.startOffset !== undefined) {
+        return {
+          startOffset: ctx.startOffset,
+          endOffset: ctx.endOffset,
+        };
+      }
+      if (ctx.children && !Array.isArray(ctx.children)) return Validator.getPositionRange(ctx.children);
+      if (Array.isArray(ctx)) {
+        return ctx.reduce((prev, el) => Validator.combinePositionRanges(prev, Validator.getPositionRange(el)), pos);
+      }
+      for (const k in ctx) {
+        if (!Object.prototype.hasOwnProperty.call(ctx, k) || !Array.isArray(ctx[k])) continue;
+        pos = Validator.combinePositionRanges(pos, Validator.getPositionRange(ctx[k]));
+      }
+      return pos;
+    }
+
+    addError(ctx, errInfo) {
+      const pos = Validator.getPositionRange(ctx);
+      pos.info = errInfo;
+      this.errors.push(pos);
+    }
+
+    reset() {
+      this.variables = {};
+      this.errors = [];
+    }
+
+    checkTimeStudyNumber(token) {
+      const tsNumber = parseFloat(token.image);
+      if (!TimeStudy(tsNumber)) {
+        this.addError(token, `Invalid time study identifier ${tsNumber}`);
+        return 0;
+      }
+      return tsNumber;
+    }
+
+    lookupVar(identifier, type) {
+      const varName = identifier.image;
+      const varInfo = this.variables[varName];
+      if (varInfo === undefined) {
+        this.addError(identifier, `Variable ${varName} has not been defined`);
+        return undefined;
+      }
+      if (varInfo.type === AutomatorVarTypes.UNKNOWN) {
+        varInfo.firstUseLineNumber = identifier.image.startLine;
+        varInfo.type = type;
+        if (type === AutomatorVarTypes.STUDIES) {
+          // The only time we have an unknown studies is if there was only one listed
+          varInfo.value = {
+            normal: [varInfo.value.toNumber()],
+            ec: 0
+          };
+        }
+      } else if (varInfo.type !== type) {
+        const inferenceMessage = varInfo.firstUseLineNumber
+          ? `\nIts use on line ${varInfo.firstUseLineNumber} identified it as a ${varInfo.type.name}`
+          : "";
+        this.addError(identifier, `Variable ${varName} is not a ${type.name}${inferenceMessage}`);
+        return undefined;
+      }
+      if (varInfo.value === undefined) throw crash("Unexpected undefined variable value");
+      return varInfo;
+    }
+
+    duration(ctx) {
+      if (ctx.$value) return ctx.$value;
+      if (!ctx.TimeUnit || ctx.TimeUnit[0].isInsertedInRecovery) {
+        this.addError(ctx, "Missing time unit");
+        return undefined;
+      }
+      const value = parseFloat(ctx.NumberLiteral[0].image) * ctx.TimeUnit[0].tokenType.$scale;
+      if (isNaN(value)) {
+        this.addError(ctx, "Error parsing time unit");
+        return undefined;
+      }
+      ctx.$value = value;
+      return ctx.$value;
+    }
+
+    define(ctx) {
+      const varName = ctx.Identifier[0].image;
+      if (this.variables[varName] !== undefined) {
+        this.addError(ctx.Identifier[0],
+          `Variable ${varName} already defined on line ${this.variables[varName].definitionLineNumber}`);
+        return;
+      }
+      if (!ctx.duration && !ctx.studyList) return;
+      const def = {
+        name: varName,
+        definitionLineNumber: ctx.Identifier[0].startLine,
+        firstUseLineNumber: 0,
+        type: AutomatorVarTypes.UNKNOWN,
+        value: undefined,
+      };
+      this.variables[varName] = def;
+      if (ctx.duration) {
+        def.type = AutomatorVarTypes.DURATION;
+        def.value = this.visit(ctx.duration);
+        return;
+      }
+      // We don't visit studyList because it might actually be just a number in this case
+      const studies = ctx.studyList[0].children.studyListEntry;
+      if (studies.length > 1 || studies[0].children.studyRange ||
+        studies[0].children.StudyPath || studies[0].children.Comma) {
+        def.type = AutomatorVarTypes.STUDIES;
+        def.value = this.visit(ctx.studyList);
+        return;
+      }
+      // We assume the value is a number; in some cases, we might overwrite it if we see
+      // this variable used in studies
+      def.value = new Decimal(studies[0].children.NumberLiteral[0].image);
+      if (!/^[1-9][0-9]*[1-9]$/u.test(studies[0].children.NumberLiteral[0].image)) {
+        // Study numbers are pretty specific number patterns
+        def.type = AutomatorVarTypes.NUMBER;
+      }
+    }
+
+    studyRange(ctx, studiesOut) {
+      if (!ctx.firstStudy || ctx.firstStudy[0].isInsertedInRecovery ||
+        !ctx.lastStudy || ctx.lastStudy[0].isInsertedInRecovery) {
+        this.addError(ctx, "Missing time study number in range");
+        return;
+      }
+      const first = this.checkTimeStudyNumber(ctx.firstStudy[0]);
+      const last = this.checkTimeStudyNumber(ctx.lastStudy[0]);
+      if (!first || !last || !studiesOut) return;
+      for (let id = first; id <= last; ++id) {
+        if (TimeStudy(id)) studiesOut.push(id);
+      }
+    }
+
+    studyListEntry(ctx, studiesOut) {
+      if (ctx.studyRange) {
+        this.visit(ctx.studyRange, studiesOut);
+        return;
+      }
+      if (ctx.NumberLiteral) {
+        if (ctx.NumberLiteral[0].isInsertedInRecovery) {
+          this.addError(ctx, "Missing time study number");
+          return;
+        }
+        const id = this.checkTimeStudyNumber(ctx.NumberLiteral[0]);
+        if (id) studiesOut.push(id);
+        return;
+      }
+      if (ctx.StudyPath) {
+        const pathId = ctx.StudyPath[0].tokenType.$studyPath;
+        const pathStudies = NormalTimeStudies.paths[pathId];
+        studiesOut.push(...pathStudies);
+      }
+    }
+
+    studyList(ctx) {
+      if (ctx.$cached !== undefined) return ctx.$cached;
+      const studiesOut = [];
+      for (const sle of ctx.studyListEntry) this.visit(sle, studiesOut);
+      ctx.$cached = {
+        normal: studiesOut,
+        ec: 0
+      };
+      if (ctx.ECNumber) {
+        if (ctx.ECNumber.isInsertedInRecovery) {
+          this.addError(ctx.Pipe[0], "Missing eternity challenge number");
+        }
+        const ecNumber = parseFloat(ctx.ECNumber[0].image);
+        if (!Number.isInteger(ecNumber) || ecNumber < 1 || ecNumber > 12) {
+          this.addError(ctx.ECNumber, `Invalid eternity challenge ID ${ecNumber}`);
+        }
+        ctx.$cached.ec = ecNumber;
+      }
+      return ctx.$cached;
+    }
+
+    compareValue(ctx) {
+      if (ctx.NumberLiteral) {
+        ctx.$value = new Decimal(ctx.NumberLiteral[0].image);
+      } else if (ctx.Identifier) {
+        ctx.$value = this.lookupVar(ctx.Identifier[0], AutomatorVarTypes.NUMBER).value;
+      }
+    }
+
+    comparison(ctx) {
+      super.comparison(ctx);
+      if (!ctx.compareValue || ctx.compareValue[0].recoveredNode) {
+        this.addError(ctx, "Missing value for comparison");
+      }
+      if (!ctx.Currency || ctx.Currency[0].isInsertedInRecovery) {
+        this.addError(ctx, "Missing currency for comparison");
+      }
+      if (!ctx.ComparisonOperator || ctx.ComparisonOperator[0].isInsertedInRecovery) {
+        this.addError(ctx, "Missing comparison operator (<, >, <=, >=)");
+      }
+    }
+
+    badCommand(ctx) {
+      const firstToken = ctx.badCommandToken[0].children;
+      const firstTokenType = Object.keys(firstToken)[0];
+      this.addError(firstToken[firstTokenType][0], `Unrecognized command ${firstToken[firstTokenType][0].image}`);
+    }
+
+    eternityChallenge(ctx) {
+      let errToken, ecNumber;
+      if (ctx.ECLiteral) {
+        ecNumber = parseFloat(ctx.ECLiteral[0].image.substr(2));
+        errToken = ctx.ECLiteral[0];
+      } else if (ctx.NumberLiteral) {
+        ecNumber = parseFloat(ctx.NumberLiteral[0].image);
+        errToken = ctx.NumberLiteral[0];
+      } else {
+        this.addError(ctx, "Missing eternity challenge number");
+        return;
+      }
+      if (!Number.isInteger(ecNumber) || ecNumber < 1 || ecNumber > 12) {
+        this.addError(errToken, `Invalid eternity challenge ID ${ecNumber}`);
+      }
+      ctx.$ecNumber = ecNumber;
+    }
+
+    checkBlock(ctx, commandToken) {
+      let hadError = false;
+      if (!ctx.RCurly || ctx.RCurly[0].isInsertedInRecovery) {
+        this.addError(commandToken[0], "Missing closing }");
+        hadError = true;
+      }
+      if (!ctx.LCurly || ctx.LCurly[0].isInsertedInRecovery) {
+        this.addError(commandToken[0], "Missing opening {");
+        hadError = true;
+      }
+      return !hadError;
+    }
+
+    script(ctx) {
+      this.reset();
+      if (ctx.block) this.visit(ctx.block);
+      ctx.variables = this.variables;
+    }
+  }
+
+  class Compiler extends BaseVisitor {
+    constructor() {
+      super();
+      // Commands provide compilation hooks; we might also have some here
+      for (const cmd of AutomatorCommands) {
+        if (!cmd.compile) continue;
+        const ownMethod = this[cmd.id];
+        // eslint-disable-next-line no-loop-func
+        this[cmd.id] = (ctx, output) => {
+          // For the compiler, we don't bother doing the default recursive visitation behavior
+          if (ownMethod && ownMethod !== super[cmd.id]) ownMethod.call(this, ctx, output);
+          let compiled = cmd.compile(ctx, this);
+          if (typeof compiled === "function") compiled = { run: compiled };
+          compiled.lineNumber = ctx.startLine;
+          output.push(compiled);
+        };
+      }
+      this.validateVisitor();
+    }
+
+    comparison(ctx) {
+      const flipped = ctx.Currency[0].startOffset > ctx.ComparisonOperator[0].startOffset;
+      const threshold = ctx.compareValue[0].children.$value;
+      const currencyGetter = ctx.Currency[0].tokenType.$getter;
+      const compareFun = ctx.ComparisonOperator[0].tokenType.$compare;
+      return () => {
+        const currency = currencyGetter();
+        return flipped ? compareFun(threshold, currency) : compareFun(currency, threshold);
+      };
+    }
+
+    block(ctx) {
+      const output = [];
+      if (ctx.command) for (const cmd of ctx.command) this.visit(cmd, output);
+      return output;
+    }
+
+    script(ctx) {
+      if (ctx.variables === undefined) {
+        throw crash("Compiler called before Validator");
+      }
+      return ctx.block ? this.visit(ctx.block) : [];
+    }
+  }
+
+  function compile(input, validateOnly = false) {
+    const lexResult = AutomatorLexer.lexer.tokenize(input);
+    const tokens = lexResult.tokens;
+    parser.input = tokens;    const t1 = Date.now();
+    const parseResult = parser.script();
+    const validator = new Validator();
+    validator.visit(parseResult);
+    validator.addLexerErrors(lexResult.errors, input);
+    validator.addParserErrors(parser.errors, tokens);
+    let compiled;
+    if (validator.errors.length === 0 && !validateOnly) {
+      compiled = new Compiler().visit(parseResult);
+    }
+    return {
+      errors: validator.errors,
+      compiled,
+    };
+  }
+  AutomatorGrammar.compile = compile;
+}());
\ No newline at end of file
diff --git a/javascripts/core/automator/lexer.js b/javascripts/core/automator/lexer.js
new file mode 100644
index 000000000..6b4788151
--- /dev/null
+++ b/javascripts/core/automator/lexer.js
@@ -0,0 +1,287 @@
+// Note: chevrotain doesn't play well with unicode regex
+/* eslint-disable require-unicode-regexp */
+/* eslint-disable camelcase */
+"use strict";
+
+const AutomatorLexer = (() => {
+  const createToken = chevrotain.createToken;
+  const Lexer = chevrotain.Lexer;
+
+  const createCategory = name => createToken({ name, pattern: Lexer.NA, longer_alt: Identifier });
+
+  // Shorthand for creating tokens and adding them to a list
+  const tokenLists = {};
+  // eslint-disable-next-line max-params
+  const createInCategory = (category, name, pattern, props = {}) => {
+    const categories = [category];
+    if (props.extraCategories) categories.push(...props.extraCategories);
+    const token = createToken({
+      name,
+      pattern,
+      categories,
+      longer_alt: Identifier,
+    });
+    const categoryName = Array.isArray(category) ? category[0].name : category.name;
+    if (tokenLists[categoryName] === undefined) tokenLists[categoryName] = [];
+    tokenLists[categoryName].push(token);
+    const patternWord = pattern.toString().match(/^\/([a-zA-Z0-9]*)\/[a-zA-Z]*$/ui);
+    if (patternWord && patternWord[1]) token.$autocomplete = patternWord[1];
+    Object.assign(token, props);
+    return token;
+  };
+
+  const HSpace = createToken({
+    name: "HSpace",
+    pattern: /[ \t]+/,
+    group: Lexer.SKIPPED
+  });
+
+  const EOL = createToken({
+    name: "EOL",
+    line_breaks: true,
+    pattern: /[ \t\r]*\n\s*/,
+    label: "End of line",
+  });
+
+  const Comment = createToken({
+    name: "Comment",
+    pattern: /(#|\/\/)[^\n]*/,
+    group: Lexer.SKIPPED
+  });
+
+  const NumberLiteral = createToken({
+    name: "NumberLiteral",
+    pattern: /-?(0|[1-9]\d*)(\.\d+)?([eE][+-]?\d+)?/,
+  });
+
+  const Identifier = createToken({
+    name: "Identifier",
+    pattern: /[a-zA-Z_][a-zA-Z_0-9]*/,
+  });
+
+  const ComparisonOperator = createToken({
+    name: "ComparisonOperator",
+    pattern: Lexer.NA,
+  });
+
+  const Currency = createCategory("Currency");
+  const PrestigeEvent = createCategory("PrestigeEvent");
+  const StudyPath = createCategory("StudyPath");
+  const TimeUnit = createCategory("TimeUnit");
+  const TTCurrency = createCategory("TTCurrency");
+
+  createInCategory(ComparisonOperator, "OpGTE", />=/, {
+    $autocomplete: ">=",
+    $compare: (a, b) => Decimal.gte(a, b),
+  });
+  createInCategory(ComparisonOperator, "OpLTE", /<=/, {
+    $autocomplete: "<=",
+    $compare: (a, b) => Decimal.lte(a, b),
+  });
+  createInCategory(ComparisonOperator, "OpGT", />/, {
+    $autocomplete: ">",
+    $compare: (a, b) => Decimal.gt(a, b),
+  });
+  createInCategory(ComparisonOperator, "OpLT", /</, {
+    $autocomplete: "<",
+    $compare: (a, b) => Decimal.lt(a, b),
+  });
+
+  createInCategory(Currency, "EP", /ep/i, {
+    extraCategories: [TTCurrency],
+    $buyTT: () => TimeTheorems.buyWithEP(),
+    $getter: () => player.eternityPoints
+  });
+  createInCategory(Currency, "IP", /ip/i, {
+    extraCategories: [TTCurrency],
+    $buyTT: () => TimeTheorems.buyWithIP(),
+    $getter: () => player.infinityPoints
+  });
+  createInCategory(Currency, "AM", /am/i, {
+    extraCategories: [TTCurrency],
+    $buyTT: () => TimeTheorems.buyWithAntimatter(),
+    $getter: () => player.money
+  });
+  createInCategory(Currency, "DT", /dt/i, { $getter: () => player.dilation.dilatedTime });
+  createInCategory(Currency, "TP", /tp/i, { $getter: () => player.dilation.tachyonParticles });
+  createInCategory(Currency, "RG", /rg/i, { $getter: () => new Decimal(Replicanti.galaxies.total) });
+  createInCategory(Currency, "Rep", /rep(licanti)?/i, {
+    $autocomplete: "rep",
+    $getter: () => player.replicanti.amount,
+  });
+  createInCategory(Currency, "TT", /(tt|time theorems?)/i, {
+    $autocomplete: "tt",
+    $getter: () => player.timestudy.theorem,
+  });
+  createInCategory(Currency, "Completions", /completions/i, {
+    $getter: () => {
+      // If we are not in an EC, pretend like we have a ton of completions so any check for sufficient
+      // completions returns true
+      if (!EternityChallenge.isRunning) return Decimal.MAX_NUMBER;
+      return EternityChallenge.gainedCompletionStatus().totalCompletions;
+    }
+  });
+
+  // $prestigeLevel is used by things that wait for a prestige event. Something waiting for
+  // eternity will be triggered by something waiting for reality, for example.
+  createInCategory(PrestigeEvent, "Infinity", /infinity/i, {
+    extraCategories: [StudyPath],
+    $autobuyer: Autobuyer.infinity,
+    $autobuyerDurationMode: AutoCrunchMode.TIME,
+    $prestigeAvailable: () => canCrunch(),
+    $prestige: () => bigCrunchResetRequest(true),
+    $prestigeLevel: 1,
+    $studyPath: TimeStudyPath.INFINITY_DIM,
+  });
+  createInCategory(PrestigeEvent, "Eternity", /eternity/i, {
+    $autobuyer: Autobuyer.eternity,
+    $autobuyerDurationMode: AutoEternityMode.TIME,
+    $prestigeAvailable: () => canEternity(),
+    $prestigeLevel: 2,
+    $prestige: () => eternity(false, true),
+  });
+  createInCategory(PrestigeEvent, "Reality", /reality/i, {
+    $autobuyer: Autobuyer.reality,
+    $prestigeAvailable: () => isRealityAvailable(),
+    $prestigeLevel: 3,
+    $prestige: () => autoReality(),
+  });
+
+  createInCategory(StudyPath, "Idle", /idle/i, { $studyPath: TimeStudyPath.IDLE });
+  createInCategory(StudyPath, "Passive", /passive/i, { $studyPath: TimeStudyPath.PASSIVE });
+  createInCategory(StudyPath, "Active", /active/i, { $studyPath: TimeStudyPath.ACTIVE });
+  createInCategory(StudyPath, "Normal", /normal/i, { $studyPath: TimeStudyPath.NORMAL_DIM });
+  createInCategory(StudyPath, "Time", /time/i, { $studyPath: TimeStudyPath.TIME_DIM });
+
+  createInCategory(TimeUnit, "Milliseconds", /ms/i, {
+    $autocomplete: "ms",
+    $scale: 1,
+  });
+  createInCategory(TimeUnit, "Seconds", /s(ec(onds?)?)?/i, {
+    $autocomplete: "sec",
+    $scale: 1000,
+  });
+  createInCategory(TimeUnit, "Minutes", /m(in(utes?)?)?/i, {
+    $autocomplete: "min",
+    $scale: 60 * 1000,
+  });
+  createInCategory(TimeUnit, "Hours", /h(ours?)?/i, {
+    $autocomplete: "hours",
+    $scale: 3600 * 1000,
+  });
+
+  const Keyword = createToken({
+    name: "Keyword",
+    pattern: Lexer.NA,
+    longer_alt: Identifier,
+  });
+
+  const keywordTokens = [];
+  const createKeyword = (name, pattern, props = {}) => {
+    const categories = [Keyword];
+    if (props.extraCategories) categories.push(...props.extraCategories);
+    const token = createToken({
+      name,
+      pattern,
+      categories,
+      longer_alt: Identifier,
+    });
+    token.$autocomplete = name.toLocaleLowerCase();
+    keywordTokens.push(token);
+    Object.assign(token, props);
+    return token;
+  };
+
+  createKeyword("Auto", /auto/i);
+  createKeyword("Buy", /buy/i);
+  createKeyword("Define", /define/i);
+  createKeyword("If", /if/i);
+  createKeyword("Load", /load/i);
+  createKeyword("Max", /max/i, {
+    extraCategories: [TTCurrency],
+    $buyTT: () => TimeTheorems.buyMax(),
+  });
+  createKeyword("Nowait", /nowait/i);
+  createKeyword("Off", /off/i);
+  createKeyword("On", /on/i);
+  createKeyword("Pause", /pause/i);
+  // Presets are a little special, because they can be named anything (like ec12 or wait)
+  // So, we consume the label at the same time as we consume the preset. In order to report
+  // errors, we also match just the word preset. And, we have to not match comments.
+  createKeyword("Preset", /preset([ \t]+(\/(?!\/)|[^\s#/])*)?/i);
+  createKeyword("Respec", /respec/i);
+  createKeyword("Restart", /restart/i);
+  createKeyword("Start", /start/i);
+  createKeyword("Studies", /studies/i);
+  createKeyword("Unlock", /unlock/i);
+  createKeyword("Until", /until/i);
+  createKeyword("Use", /use/i);
+  createKeyword("Wait", /wait/i);
+  createKeyword("While", /while/i);
+  createKeyword("BlackHole", /black[ \t]+hole/i, {
+    $autocomplete: "black hole",
+  });
+  createKeyword("StoreTime", /stored?[ \t]+time/i, {
+    $autocomplete: "store time",
+  });
+
+  createKeyword("Dilation", /dilation/i);
+  createKeyword("EC", /ec/i);
+  // We allow ECLiteral to consume lots of digits because that makes error reporting more
+  // clear (it's nice to say ec123 is an invalid ec)
+  const ECLiteral = createToken({
+    name: "ECLiteral",
+    pattern: /ec[1-9][0-9]*/i,
+    longer_alt: Identifier,
+  });
+
+  const LCurly = createToken({ name: "LCurly", pattern: /[ \t]*{/ });
+  const RCurly = createToken({ name: "RCurly", pattern: /[ \t]*}/ });
+  const Comma = createToken({ name: "Comma", pattern: /,/ });
+  const EqualSign = createToken({ name: "EqualSign", pattern: /=/, label: "=" });
+  const Pipe = createToken({ name: "Pipe", pattern: /\|/, label: "|" });
+  const Dash = createToken({ name: "Dash", pattern: /-/, label: "-" });
+
+  // The order here is the order the lexer looks for tokens in.
+  const automatorTokens = [
+    HSpace, Comment, EOL,
+    LCurly, RCurly, Comma, EqualSign, Pipe, Dash,
+    ComparisonOperator, ...tokenLists.ComparisonOperator,
+    NumberLiteral,
+    ECLiteral,
+    Keyword, ...keywordTokens,
+    PrestigeEvent, ...tokenLists.PrestigeEvent,
+    StudyPath, ...tokenLists.StudyPath,
+    Currency, ...tokenLists.Currency,
+    TTCurrency,
+    TimeUnit, ...tokenLists.TimeUnit,
+    Identifier,
+  ];
+
+  // Labels only affect error messages and Diagrams.
+  LCurly.LABEL = "'{'";
+  RCurly.LABEL = "'}'";
+  NumberLiteral.LABEL = "Number";
+  Comma.LABEL = "❟";
+
+  const lexer = new Lexer(automatorTokens, {
+    positionTracking: "full",
+    ensureOptimizations: true
+  });
+
+  // The lexer uses an ID system that's separate from indices into the token array
+  const tokenIds = [];
+  for (const token of lexer.lexerDefinition) {
+    tokenIds[token.tokenTypeIdx] = token;
+  }
+
+  // We use this while building up the grammar
+  const tokenMap = automatorTokens.mapToObject(e => e.name, e => e);
+
+  return {
+    lexer,
+    tokens: automatorTokens,
+    tokenIds,
+    tokenMap,
+  };
+})();
diff --git a/javascripts/core/automator/parser.js b/javascripts/core/automator/parser.js
new file mode 100644
index 000000000..bfa45ba51
--- /dev/null
+++ b/javascripts/core/automator/parser.js
@@ -0,0 +1,140 @@
+"use strict";
+
+const AutomatorGrammar = (function() {
+  const Parser = chevrotain.Parser;
+  const T = AutomatorLexer.tokenMap;
+
+  // ----------------- parser -----------------
+  class AutomatorParser extends Parser {
+    constructor() {
+      super(AutomatorLexer.tokens, {
+        recoveryEnabled: true,
+        outputCst: true,
+      });
+
+      // eslint-disable-next-line consistent-this
+      const $ = this;
+
+      $.RULE("script", () => $.SUBRULE($.block));
+
+      $.RULE("block", () => $.MANY_SEP({
+        SEP: T.EOL,
+        DEF: () => $.OPTION(() => $.SUBRULE($.command)),
+      }));
+
+      // This is a bit ugly looking. Chevrotain uses Function.toString() to do crazy
+      // optimizations. That clashes with our desire to build our list of commands dynamically.
+      // We are creating a function body like this one:
+      //      $.RULE("command", () => {
+      //          $.OR(
+      //            $.c1 || ($.c1 = [
+      //              { ALT: () => $.SUBRULE($.badCommand) },
+      //              { ALT: () => $.SUBRULE($.auto) },
+      //              { ALT: () => $.SUBRULE($.define) },
+      //              { ALT: () => $.SUBRULE($.ifBlock) },
+
+      const commandAlts = [
+        "$.SUBRULE($.badCommand)",
+        "$.CONSUME(chevrotain.EOF)",
+      ];
+
+      for (const cmd of AutomatorCommands) {
+        $.RULE(cmd.id, cmd.rule($));
+        commandAlts.push(`$.SUBRULE($.${cmd.id})`);
+      }
+
+      const commandOr = window.Function("$", `
+        return () => $.OR($.c1 || ($.c1 = [
+          ${commandAlts.map(e => `{ ALT: () => ${e} },`).join("\n")}]));
+      `);
+
+      $.RULE("command", commandOr($));
+
+      $.RULE("badCommand", () => $.AT_LEAST_ONE(() => $.SUBRULE($.badCommandToken)),
+        { resyncEnabled: false, }
+      );
+
+      $.RULE("badCommandToken", () => $.OR([
+        { ALT: () => $.CONSUME(T.Identifier) },
+        { ALT: () => $.CONSUME(T.NumberLiteral) },
+        { ALT: () => $.CONSUME(T.ComparisonOperator) },
+      ]), { resyncEnabled: false, });
+
+      $.RULE("comparison", () => {
+        $.OR([
+          {
+            ALT: () => {
+              $.CONSUME(T.Currency);
+              $.CONSUME(T.ComparisonOperator);
+              $.SUBRULE($.compareValue);
+            }
+          },
+          {
+            ALT: () => {
+              $.SUBRULE1($.compareValue);
+              $.CONSUME1(T.ComparisonOperator);
+              $.CONSUME1(T.Currency);
+            }
+          },
+        ]);
+      });
+
+      $.RULE("compareValue", () => $.OR([
+        { ALT: () => $.CONSUME(T.NumberLiteral) },
+        { ALT: () => $.CONSUME(T.Identifier) },
+      ]));
+
+      $.RULE("duration", () => {
+        $.CONSUME(T.NumberLiteral);
+        $.CONSUME(T.TimeUnit);
+      });
+
+      $.RULE("eternityChallenge", () => $.OR([
+        {
+          ALT: () => {
+            $.CONSUME(T.EC);
+            $.CONSUME(T.NumberLiteral);
+          }
+        },
+        { ALT: () => $.CONSUME(T.ECLiteral) }
+      ]));
+
+      $.RULE("studyList", () => {
+        $.AT_LEAST_ONE(() => $.SUBRULE($.studyListEntry));
+        // Support the |3 export format for EC number
+        $.OPTION(() => {
+          $.CONSUME(T.Pipe);
+          $.CONSUME1(T.NumberLiteral, { LABEL: "ECNumber" });
+        });
+      }, { resyncEnabled: false });
+
+      $.RULE("studyListEntry", () => {
+        $.OR([
+          { ALT: () => $.SUBRULE($.studyRange) },
+          { ALT: () => $.CONSUME(T.NumberLiteral) },
+          { ALT: () => $.CONSUME(T.StudyPath) },
+        ]);
+        $.OPTION(() => $.CONSUME(T.Comma));
+      });
+
+      $.RULE("studyRange", () => {
+        $.CONSUME(T.NumberLiteral, { LABEL: "firstStudy" });
+        $.CONSUME(T.Dash);
+        $.CONSUME1(T.NumberLiteral, { LABEL: "lastStudy" });
+      });
+
+      // Very important to call this after all the rules have been setup.
+      // otherwise the parser may not work correctly as it will lack information
+      // derived from the self analysis.
+      $.performSelfAnalysis();
+    }
+  }
+
+  const parser = new AutomatorParser();
+
+  return {
+    parser,
+    // This field is filled in by automator-validate.js
+    validate: null,
+  };
+}());
diff --git a/javascripts/core/big_crunch.js b/javascripts/core/big_crunch.js
index fc72cc2bd..41083c70d 100644
--- a/javascripts/core/big_crunch.js
+++ b/javascripts/core/big_crunch.js
@@ -5,31 +5,54 @@ function bigCrunchAnimation() {
   setTimeout(() => {
       document.body.style.animation = "";
   }, 2000);
-  setTimeout(bigCrunchReset(true), 1000);
+  setTimeout(bigCrunchReset(), 1000);
 }
 
-function bigCrunchReset(disableAnimation = false) {
+function canCrunch() {
   const challenge = NormalChallenge.current || InfinityChallenge.current;
-  if (player.money.lt(Decimal.MAX_NUMBER) || (challenge && player.money.lt(challenge.goal))) {
-    return;
+  const goal = challenge === undefined ? Decimal.MAX_NUMBER : challenge.goal;
+  if (player.money.lt(goal)) return false;
+  return true;
+}
+
+function handleChallengeCompletion() {
+  if (!NormalChallenge(1).isCompleted) {
+    NormalChallenge(1).complete();
   }
+  const challenge = NormalChallenge.current || InfinityChallenge.current;
+  if (!challenge) return;
+  if (!challenge.isCompleted) {
+    challenge.complete();
+    Autobuyer.tryUnlockAny();
+  }
+  challenge.updateChallengeTime();
+  if (NormalChallenge(9).isRunning) {
+    kong.submitStats("NormalChallenge 9 time record (ms)", Math.floor(player.thisInfinityTime));
+  }
+  if (!player.options.retryChallenge) {
+    player.challenge.normal.current = 0;
+    player.challenge.infinity.current = 0;
+  }
+}
+
+function bigCrunchResetRequest(disableAnimation = false) {
+  if (!canCrunch()) return;
   const earlyGame = player.bestInfinityTime > 60000 && !player.break;
   if (earlyGame && !disableAnimation && player.options.animations.bigCrunch) {
     bigCrunchAnimation();
-    return;
+  } else {
+    bigCrunchReset();
   }
+}
+
+function bigCrunchReset() {
+  if (!canCrunch()) return;
+  const earlyGame = player.bestInfinityTime > 60000 && !player.break;
+  const challenge = NormalChallenge.current || InfinityChallenge.current;
   EventHub.dispatch(GameEvent.BIG_CRUNCH_BEFORE);
-  if (challenge) {
-    if (!challenge.isCompleted) {
-      challenge.complete();
-      Autobuyer.tryUnlockAny();
-    }
-    challenge.updateChallengeTime();
-  }
+  handleChallengeCompletion();
+
   if (earlyGame || (challenge && !player.options.retryChallenge)) showTab("dimensions");
-  if (NormalChallenge(9).isRunning) {
-    kong.submitStats('NormalChallenge 9 time record (ms)', Math.floor(player.thisInfinityTime));
-  }
   let infinityPoints = gainedInfinityPoints();
   player.infinityPoints = player.infinityPoints.plus(infinityPoints);
   addInfinityTime(player.thisInfinityTime, player.thisInfinityRealTime, infinityPoints);
@@ -39,15 +62,6 @@ function bigCrunchReset(disableAnimation = false) {
 
   if (EternityChallenge(4).tryFail()) return;
 
-  if (player.infinitied.gt(0) && !NormalChallenge(1).isCompleted) {
-    NormalChallenge(1).complete();
-    Autobuyer.tryUnlockAny();
-  }
-  if (!player.options.retryChallenge) {
-    player.challenge.normal.current = 0;
-    player.challenge.infinity.current = 0;
-  }
-
   // FIXME: Infinitified is now Decimal so decide what happens here!
   //kong.submitStats('Infinitied', Player.totalInfinitied);
   kong.submitStats('Fastest Infinity time (ms)', Math.floor(player.bestInfinityTime));
@@ -100,7 +114,7 @@ function secondSoftReset() {
     AchievementTimers.marathon2.reset();
 }
 
-document.getElementById("bigcrunch").onclick = bigCrunchReset;
+document.getElementById("bigcrunch").onclick = bigCrunchResetRequest;
 
 function totalIPMult() {
   if (Effarig.isRunning && Effarig.currentStage === EFFARIG_STAGES.INFINITY) {
diff --git a/javascripts/core/canvases.js b/javascripts/core/canvases.js
index 9e9ab22fe..e5ba47cde 100644
--- a/javascripts/core/canvases.js
+++ b/javascripts/core/canvases.js
@@ -1,75 +1,5 @@
 "use strict";
 
-var canvas4 = document.getElementById("automatorTreeCanvas");
-var ctx4 = canvas4.getContext("2d");
-
-window.addEventListener("resize", resizeCanvas);
-
-function resizeCanvas() {
-    canvas4.width = 0;
-    canvas4.height = 0;
-    canvas4.width = document.body.scrollWidth;
-    canvas4.height = document.body.scrollHeight;
-    drawAutomatorTree();
-}
-
-function drawAutomatorTreeBranch(num1, num2) {
-    if (document.getElementById("automation").style.display === "none") return
-    var id1 = parseInt(num1.split("automator")[1])
-    var id2 = parseInt(num2.split("automator")[1])
-    var start = document.getElementById(num1).getBoundingClientRect();
-    var end = document.getElementById(num2).getBoundingClientRect();
-    var x1 = start.left + (start.width / 2) + (document.documentElement.scrollLeft || document.body.scrollLeft);
-    var y1 = start.top + (start.height / 2) + (document.documentElement.scrollTop || document.body.scrollTop);
-    var x2 = end.left + (end.width / 2) + (document.documentElement.scrollLeft || document.body.scrollLeft);
-    var y2 = end.top + (end.height / 2) + (document.documentElement.scrollTop || document.body.scrollTop);
-    ctx4.lineWidth=10;
-    ctx4.beginPath();
-    if (player.reality.automatorCommands.has(id1) && player.reality.automatorCommands.has(id2)) {
-        ctx4.strokeStyle="#000";
-    } else {
-        ctx4.strokeStyle="#444";
-    }
-    ctx4.moveTo(x1, y1);
-    ctx4.lineTo(x2, y2);
-    ctx4.stroke();
-}
-
-function drawAutomatorTree() {
-    ctx4.clearRect(0, 0, canvas4.width, canvas4.height);
-    drawAutomatorTreeBranch("automator11", "automator21");
-    drawAutomatorTreeBranch("automator11", "automator22");
-    drawAutomatorTreeBranch("automator11", "automator23");
-    drawAutomatorTreeBranch("automator11", "automator32");
-    drawAutomatorTreeBranch("automator11", "automator32");
-    drawAutomatorTreeBranch("automator11", "automator41");
-    drawAutomatorTreeBranch("automator11", "automator42");
-    drawAutomatorTreeBranch("automator21", "automator31");
-    drawAutomatorTreeBranch("automator42", "automator52");
-    drawAutomatorTreeBranch("automator12", "automator24");
-    drawAutomatorTreeBranch("automator12", "automator25");
-    drawAutomatorTreeBranch("automator12", "automator26");
-    drawAutomatorTreeBranch("automator26", "automator36");
-    drawAutomatorTreeBranch("automator12", "automator34");
-    drawAutomatorTreeBranch("automator12", "automator35");
-    drawAutomatorTreeBranch("automator12", "automator43");
-    drawAutomatorTreeBranch("automator12", "automator44");
-    drawAutomatorTreeBranch("automator41", "automator51");
-    drawAutomatorTreeBranch("automator43", "automator53");
-    drawAutomatorTreeBranch("automator44", "automator54");
-    drawAutomatorTreeBranch("automator51", "automator61");
-    drawAutomatorTreeBranch("automator52", "automator62");
-    drawAutomatorTreeBranch("automator54", "automator63");
-    drawAutomatorTreeBranch("automator54", "automator64");
-    drawAutomatorTreeBranch("automator61", "automator71");
-    drawAutomatorTreeBranch("automator62", "automator72");
-    drawAutomatorTreeBranch("automator64", "automator73");
-    drawAutomatorTreeBranch("automator71", "automator81");
-    drawAutomatorTreeBranch("automator71", "automator82");
-    drawAutomatorTreeBranch("automator73", "automator83");
-    drawAutomatorTreeBranch("automator73", "automator84");
-}
-
 let nodes = [];
 let edges = [];
 const nodeContainer = $(".vis-network")[0];
diff --git a/javascripts/core/challenge.js b/javascripts/core/challenge.js
index 0d806d4a9..2dcc26e9f 100644
--- a/javascripts/core/challenge.js
+++ b/javascripts/core/challenge.js
@@ -111,6 +111,7 @@ class NormalChallengeState extends GameMechanicState {
   complete() {
     // eslint-disable-next-line no-bitwise
     player.challenge.normal.completedBits |= 1 << this.id;
+    Autobuyer.tryUnlockAny();
   }
 
   get goal() {
diff --git a/javascripts/core/constants.js b/javascripts/core/constants.js
index 31ce9c345..690ac0ccd 100644
--- a/javascripts/core/constants.js
+++ b/javascripts/core/constants.js
@@ -83,7 +83,19 @@ const AutoGlyphPickMode = {
   RANDOM: 0,
   RARITY: 1,
   ABOVE_SACRIFICE_THRESHOLD: 2,
-}
+};
+
+const TimeStudyPath = {
+  NONE: 0,
+  NORMAL_DIM: 1,
+  INFINITY_DIM: 2,
+  TIME_DIM: 3,
+  ACTIVE: 4,
+  PASSIVE: 5,
+  IDLE: 6,
+  LIGHT: 7,
+  DARK: 8
+};
 
 // Use through Automator.Instructions; here to support creation of index by ID
 const _AutomatorInstructions = Object.freeze({
@@ -321,7 +333,7 @@ function _makeAutomatorInstructionsById() {
   return ret;
 }
 
-const Automator = Object.freeze({
+const AutomatorInstructions = Object.freeze({
   Instructions: _AutomatorInstructions,
   InstructionsById: _makeAutomatorInstructionsById(),
 });
diff --git a/javascripts/core/eternity_challenge.js b/javascripts/core/eternity_challenge.js
index e8610a79b..e2b25d044 100644
--- a/javascripts/core/eternity_challenge.js
+++ b/javascripts/core/eternity_challenge.js
@@ -69,16 +69,16 @@ class EternityChallengeState extends GameMechanicState {
   }
 
   set completions(value) {
-    if (Enslaved.isRunning && this.id === 1) {
-      player.eternityChalls[this.fullId] = Math.min(1000, value);
-      return;
-    }
-    player.eternityChalls[this.fullId] = Math.min(value, TIERS_PER_EC);
+    player.eternityChalls[this.fullId] = Math.min(value, this.maxCompletions);
   }
 
   get isFullyCompleted() {
-    if (Enslaved.isRunning && this.id === 1) return this.completions === 1000;
-    return this.completions === TIERS_PER_EC;
+    return this.completions === this.maxCompletions;
+  }
+
+  get maxCompletions() {
+    if (Enslaved.isRunning && this.id === 1) return 1000;
+    return TIERS_PER_EC;
   }
 
   get initialGoal() {
@@ -102,9 +102,15 @@ class EternityChallengeState extends GameMechanicState {
   }
 
   goalAtCompletions(completions) {
-    return completions > 0 ?
-      this.initialGoal.times(this.goalIncrease.pow(completions)) :
-      this.initialGoal;
+    return completions > 0
+      ? this.initialGoal.times(this.goalIncrease.pow(completions))
+      : this.initialGoal;
+  }
+
+  completionsAtIP(ip) {
+    if (ip.lt(this.initialGoal)) return 0;
+    const completions = (ip.dividedBy(this.initialGoal)).log10() / this.goalIncrease.log10();
+    return Math.min(Math.floor(completions), this.maxCompletions);
   }
 
   addCompletion() {
@@ -243,3 +249,40 @@ EternityChallenge.autoCompleteTick = function() {
   }
   player.reality.lastAutoEC %= threshold;
 };
+
+EternityChallenge.gainedCompletionStatus = function() {
+  const currentEC = EternityChallenge.current;
+  const currentCompletions = currentEC.completions;
+  const status = {
+    fullyCompleted: currentEC.isFullyCompleted,
+    gainedCompletions: 0,
+    totalCompletions: currentCompletions,
+  };
+  if (status.fullyCompleted) return status;
+  if (!Perk.studyECBulk.isBought) {
+    if (currentEC.canBeCompleted) {
+      ++status.totalCompletions;
+      status.gainedCompletions = 1;
+    }
+    return status;
+  }
+  status.totalCompletions = currentEC.completionsAtIP(player.infinityPoints);
+
+  if (EternityChallenge(4).isRunning) {
+    const maxEC4Valid = player.infinitied.lte(16) ? 5 - Math.ceil(player.infinitied.toNumber() / 4) : 0;
+    if (status.totalCompletions >= maxEC4Valid && status.gainedCompletions > 1) {
+      status.totalCompletions = Math.min(status.totalCompletions, maxEC4Valid);
+      status.failedCondition = "(Too many infinities for more)";
+    }
+  } else if (EternityChallenge(12).isRunning) {
+    const maxEC12Valid = 5 - Math.floor(player.thisEternity / 200);
+    if (status.totalCompletions >= maxEC12Valid && status.gainedCompletions > 1) {
+      status.totalCompletions = Math.min(status.totalCompletions, maxEC12Valid);
+      status.failedCondition = "(Too slow for more)";
+    }
+  }
+  status.gainedCompletions = status.totalCompletions - currentCompletions;
+  status.hasMoreCompletions = status.gainedCompletions < currentEC.maxCompletions;
+  status.nextGoalAt = currentEC.goalAtCompletions(status.totalCompletions);
+  return status;
+};
diff --git a/javascripts/core/event-hub.js b/javascripts/core/event-hub.js
index d47bdad84..904b545fc 100644
--- a/javascripts/core/event-hub.js
+++ b/javascripts/core/event-hub.js
@@ -15,7 +15,7 @@ class EventHub {
   }
 
   offAll(target) {
-    for (const handlers in this._handlers) {
+    for (const handlers of Object.keys(this._handlers)) {
       this._handlers[handlers] = this._handlers[handlers]
         .filter(handler => handler.target !== target);
     }
@@ -103,6 +103,7 @@ const GameEvent = {
   REALITY_UPGRADE_BOUGHT: "REALITY_UPGRADE_BOUGHT",
   PERK_BOUGHT: "PERK_BOUGHT",
   BLACK_HOLE_UPGRADE_BOUGHT: "BLACK_HOLE_UPGRADE_BOUGHT",
+  GAME_LOAD: "GAME_LOAD",
 
   // UI Events
   UPDATE: "UPDATE",
diff --git a/javascripts/core/extensions.js b/javascripts/core/extensions.js
index 432112e4b..49ab24542 100644
--- a/javascripts/core/extensions.js
+++ b/javascripts/core/extensions.js
@@ -244,3 +244,7 @@ Array.prototype.compact = function() {
 };
 
 Decimal.MAX_NUMBER = new Decimal(Number.MAX_VALUE);
+
+String.isWhiteSpace = function(value) {
+  return value && !value.trim();
+};
diff --git a/javascripts/core/hotkeys.js b/javascripts/core/hotkeys.js
index bbc85b5d2..30c69e91f 100644
--- a/javascripts/core/hotkeys.js
+++ b/javascripts/core/hotkeys.js
@@ -16,7 +16,7 @@ GameKeyboard.bindRepeatableHotkey("s", () => sacrificeBtnClick());
 GameKeyboard.bindRepeatableHotkey("r", () => replicantiGalaxy());
 GameKeyboard.bindRepeatableHotkey("t", () => buyMaxTickSpeed());
 GameKeyboard.bindRepeatableHotkey("shift+t", () => buyTickSpeed());
-GameKeyboard.bindRepeatableHotkey("c", () => bigCrunchReset());
+GameKeyboard.bindRepeatableHotkey("c", () => bigCrunchResetRequest());
 GameKeyboard.bindRepeatableHotkey("e", () => eternity());
 
 (function() {
diff --git a/javascripts/core/perks.js b/javascripts/core/perks.js
index 571cc7d9a..72f200e95 100644
--- a/javascripts/core/perks.js
+++ b/javascripts/core/perks.js
@@ -35,7 +35,6 @@ class PerkState extends PurchasableMechanicState {
     if (!super.purchase()) return;
     GameCache.achSkipPerkCount.invalidate();
     GameCache.buyablePerks.invalidate();
-    updateAutomatorRows();
     drawPerkNetwork();
     EventHub.dispatch(GameEvent.PERK_BOUGHT);
   }
diff --git a/javascripts/core/player.js b/javascripts/core/player.js
index 519235a8a..4480c2cd4 100644
--- a/javascripts/core/player.js
+++ b/javascripts/core/player.js
@@ -220,7 +220,19 @@ let player = {
     pp: 0,
     autoEC: true,
     lastAutoEC: 0,
-    partEternitied: 0
+    partEternitied: 0,
+    automator: {
+      state: {
+        mode: AutomatorMode.STOP,
+        topLevelScript: 0,
+        editorScript: 0,
+        repeat: false,
+        stack: [],
+      },
+      scripts: {
+      },
+      lastID: 0,
+    }
   },
   blackHole: Array.range(0, 2).map(id => ({
     id,
@@ -447,7 +459,7 @@ function guardFromNaNValues(obj) {
     if (!obj.hasOwnProperty(key)) continue;
 
     //TODO: rework autobuyer saving
-    if (key === "autobuyers" || key === "autoSacrifice") continue;
+    if (key === "autobuyers" || key === "autoSacrifice" || key === "automator") continue;
 
     let value = obj[key];
     if (isObject(value)) {
diff --git a/javascripts/core/reality.js b/javascripts/core/reality.js
index fe46f89ae..f0f5ed5bc 100644
--- a/javascripts/core/reality.js
+++ b/javascripts/core/reality.js
@@ -391,7 +391,6 @@ function completeReality(force, reset, auto = false) {
     Tab.dimensions.normal.show();
   }
   AchievementTimers.marathon2.reset();
-  updateAutomatorRows();
   drawPerkNetwork();
 
   resetInfinityPoints();
diff --git a/javascripts/core/secret-formula/reality/automator.js b/javascripts/core/secret-formula/reality/automator.js
new file mode 100644
index 000000000..9c1241709
--- /dev/null
+++ b/javascripts/core/secret-formula/reality/automator.js
@@ -0,0 +1,261 @@
+"use strict";
+
+GameDatabase.reality.automator = {
+  commands: [
+    {
+      id: 0,
+      keyword: "wait",
+      name: "<b>wait</b> - wait for something",
+      syntax: "<b>wait</b> condition",
+      description: "Forces automator to wait for some condition or event",
+      sections: [
+        {
+          name: "CONDITIONS",
+          items: [
+            {
+              header: "<i>resource</i> <i>comparison</i> <i>number</i>",
+              description: `
+                Wait until resource amount satisfies the comparison.<br>
+                <b>Resources</b>: am (Antimatter), ip (Infinity Points), ep (Eternity Points), dt (Dilated Time),
+                tp (Tachyon Particles), rg (Replicanti Galaxies), rep/replicanti, tt/time theorems<br>
+                <b>Comparisons</b>: <, <=, > >=<br>
+                <b>Number</b> should be in scientific format, e.g. 1000, 1e100, 1.8e308
+              `
+            },
+            {
+              header: "<i>completions</i> <i>comparison</i> <i>number</i>",
+              description: `
+                Wait for a certain <b>total</b> number of EC completions that you'd get at eternity.<br>
+                <b>Comparisons</b>: >, >=
+              `
+            },
+            {
+              header: "<i>prestige</i>",
+              description: `
+                Wait until certain prestige has been triggered.<br>
+                <b>Prestiges</b>: infinity, eternity, reality
+              `
+            }
+          ]
+        }
+      ],
+      examples: [
+        "wait infinity",
+        "wait am >= 1e308",
+        "wait completions >= 5",
+      ]
+    },
+    {
+      id: 1,
+      keyword: "start",
+      name: "<b>start</b> - start Eternity Challenge (this also unlocks said EC) or Time Dilation",
+      syntax: "<b>start</b> [ec<i>X</i>|dilation]",
+      examples: [
+        "start ec12",
+        "start dilation"
+      ]
+    },
+    {
+      id: 2,
+      keyword: "infinity / eternity / reality",
+      name: "<b>infinity|eternity|reality</b> - triggers Infinity, Eternity, or Reality",
+      syntax: "<b>infinity</b>,<br> <b>eternity</b>,<br> <b>reality</b>",
+      examples: [
+        "infinity",
+        "reality",
+      ]
+    },
+    {
+      id: 3,
+      keyword: "tt",
+      name: "<b>tt</b> - purchases Time Theorems with a resource or buys the maximum possible",
+      syntax:
+        "<b>tt</b> action",
+      sections: [
+        {
+          name: "ACTIONS",
+          items: [
+            {
+              header: "<i>resources</i>",
+              description: `
+              Buys with a specific resource.<br>
+              <b>Resources</b>: am (Antimatter), ip (Infinity Points), ep (Eternity Points)
+              `
+            },
+            {
+              header: "<i>max</i>",
+              description: `
+              Buys the maximum number of time theorems from all resources.
+              `
+            },
+          ]
+        }
+      ]
+    },
+    {
+      id: 4,
+      keyword: "black hole",
+      name: "<b>black hole</b> - turns the Black Hole on and off",
+      syntax: "<b>black hole</b> on/off",
+      examples: [
+        "black hole on",
+        "black hole off",
+      ]
+    },
+    {
+      id: 5,
+      keyword: "store time",
+      name: "<b>store time</b> - either turns on/off the storing of time or can be used to use stored time",
+      syntax: "<b>store time</b> action",
+      sections: [
+        {
+          name: "ACTIONS",
+          items: [
+            {
+              header: "<i>on/off</i>",
+              description: `
+            Turns storing time on or off.
+            `
+            },
+            {
+              header: "<i>use</i>",
+              description: `
+              Uses stored time.
+              `
+            }
+          ]
+        }
+      ]
+    },
+    {
+      id: 6,
+      keyword: "unlock",
+      name: "<b>unlock</b> - can be used to unlock certain features",
+      syntax: "<b>unlock</b> feature",
+      examples: [
+        "unlock dilation",
+        "unlock ec<i>X</i>"
+      ]
+    },
+    {
+      id: 7,
+      keyword: "auto",
+      name: "<b>auto</b> - can turn the Infinity/Eternity/Reality autobuyers on or off and can edit the inputs on the infinity and eternity autobuyers (editing will turn them on)",
+      syntax: "<b>auto</b> [infinity|eternity] [interval]",
+      examples: [
+        "auto infinity on",
+        "auto eternity off",
+        "auto infinity 30s",
+        "auto eternity 10 seconds"
+      ]
+    },
+    {
+      id: 8,
+      keyword: "if",
+      name: "<b>if</b> - compares your amount to the game's amount of something, such as a currency",
+      syntax: "<b>if</b> [am|ip|ep|dt|tp|rg|rep|tt|completions] (comparison) [number]",
+      examples: [
+        "if ep <= 1e3000",
+        "if dt >= 1e50",
+        "if ip < 1e1500000"
+      ]
+    },
+    {
+      id: 9,
+      keyword: "pause",
+      name: "<b>pause</b> - pauses the automator for a set amount of time",
+      syntax: "<b>pause</b> [interval]",
+      examples: [
+        "pause 10s",
+        "pause 1 minute",
+        "pause 34 seconds"
+      ]
+    },
+    {
+      id: 10,
+      keyword: "until",
+      name: "<b>until</b> - repeats commands until a condition or event",
+      syntax: `<b>until</b> [condition | event] {<br>
+        <blockquote>commands</blockquote>
+      }<br>
+      <b>condition</b>: [quantity] (comparison) [number]<br>
+      <b>quantity</b>: [am|ip|ep|dt|tp|rg|rep|tt|completions]<br>
+      <b>event</b>: [infinity|eternity|reality] (can happen at any time after loop starts)`,
+      description: `Commands are repeated; the condition is checked at the start and every
+      time the loop repeats. If an event is specified, then the loop will repeat until the
+      event occurs. (The event has to happen after the loop begins).<br>
+      A variable name may be used in place of <b>number</b>, see <b>define</b>`,
+      examples: [
+        `until ep > 1e500 {<br>
+          <blockquote>
+          tt max<br>
+          studies nowait 11-62</blockquote>
+        }`,
+      ]
+    },
+    {
+      id: 11,
+      keyword: "while",
+      name: "<b>while</b> - repeats commands while a condition is met",
+      syntax: `<b>while</b> [quantity] (comparison) [number]{<br>
+        <blockquote>commands</blockquote>
+      }<br>
+      <b>quantity</b>: [am|ip|ep|dt|tp|rg|rep|tt|completions]<br>
+      <b>comparison</b>: [<|<=|>=|>]<br>
+      <b>number</b>: Number in normal or scientific notation`,
+      description: `Commands are repeated; the condition is checked at the start and every
+      time the loop repeats.<br>
+      A variable name may be used in place of <b>number</b>, see <b>define</b>`,
+      examples: [
+        `while ep < 1e500 {<br>
+          <blockquote>
+          tt max<br>
+          studies nowait 11-62</blockquote>
+        }`,
+        `while myThreshold > am { ...`,
+      ]
+    },
+    {
+      id: 12,
+      keyword: "studies respec",
+      name: "<b>studies respec</b> - respec time studies on next eternity",
+      syntax: `<b>studies respec</b>`,
+      examples: [
+        `studies respec`,
+      ]
+    },
+    {
+      id: 13,
+      keyword: "studies load preset",
+      name: "<b>studies load preset</b> - Load a saved study preset",
+      syntax: `<b>studies load preset [name | number]</b>`,
+      description: `Loads a study preset, as if you'd clicked on the button in the time
+        study tab. Number is 1 to 6 (corresponding to slot). The given name can also be used.`,
+      examples: [
+        `studies load preset 2`,
+        `studies load preset dil`,
+      ]
+    },
+    {
+      id: 14,
+      keyword: "studies",
+      name: "<b>studies</b> - Purchase time studies",
+      syntax: `<b>studies [nowait] <i>[study list]</i></b>`,
+      description: `Purchase time studies specified. If <b>nowait</b> is present, then
+        the automator will purchase as many studies as possible at the moment, and move on
+        to the next command.<br>
+        If <b>nowait</b> is <i>not</i> present, then the automator will buy the studies in order,
+        waiting for them to become available/affordable if necessary.<br>
+        The study list can consist of study numbers, separated by spaces or commas, ranges of
+        studies (for example, <i>11-62</i>) and the following aliases:<br>
+        <blockquote><b>normal, infinity, time, active, passive, idle</b></blockquote>
+        A variable name may be used in place of study list, see <b>define</b>
+        The string produced by "export" in the time study tab can be used with this command.`,
+      examples: [
+        "studies nowait 11,21,31",
+        "studies 11-62, normal, 111, idle",
+        "studies nowait ec6Studies",
+      ]
+    },
+  ]
+};
diff --git a/javascripts/core/storage/storage.js b/javascripts/core/storage/storage.js
index 5ba0ae403..1fcd5528c 100644
--- a/javascripts/core/storage/storage.js
+++ b/javascripts/core/storage/storage.js
@@ -76,12 +76,10 @@ const GameStorage = {
   verifyPlayerObject(save) {
     return save !== undefined && save !== null && save.money !== undefined;
   },
-  
+
   save(silent = false) {
     if (GlyphSelection.active) return;
     if (++this.saved > 99) SecretAchievement(12).unlock();
-    player.reality.automatorOn = automatorOn;
-    player.reality.automatorCurrentRow = automatorIdx;
     const root = {
       current: this.currentSlot,
       saves: this.saves
@@ -89,7 +87,7 @@ const GameStorage = {
     localStorage.setItem(this.localStorageKey, GameSaveSerializer.serialize(root));
     if (!silent) GameUI.notify.info("Game saved");
   },
-  
+
   export() {
     const save = GameSaveSerializer.serialize(player);
     copyToClipboardAndNotify(save);
@@ -144,8 +142,6 @@ const GameStorage = {
     Autobuyer.checkIntervalAchievements();
     Autobuyer.checkBulkAchievements();
     Autobuyer.convertPropertiesToDecimal();
-    resizeCanvas();
-    updateAutomatorRows();
     checkPerkValidity();
     Teresa.checkPPShopValidity();
     drawPerkNetwork();
@@ -155,18 +151,13 @@ const GameStorage = {
     Theme.set(player.options.theme);
     Notation.find(player.options.notation).setCurrent();
 
-    if (localStorage.getItem("automatorScript1") !== null) {
-      importAutomatorScript(localStorage.getItem("automatorScript1"));
-    }
-    automatorOn = player.reality.automatorOn;
-    if (automatorOn) $("#automatorOn")[0].checked = true;
-    automatorIdx = player.reality.automatorCurrentRow;
-
     if (player.options.newUI) {
       ui.view.newUI = true;
-      ui.view.page = "new-dimensions-tab"
+      ui.view.page = "new-dimensions-tab";
     }
 
+    EventHub.dispatch(GameEvent.GAME_LOAD);
+    AutomatorBackend.initializeFromSave();
     Lazy.invalidateAll();
 
     let diff = Date.now() - player.lastUpdate;
diff --git a/javascripts/core/timestudies.js b/javascripts/core/timestudies.js
index 9b2f79991..87224ea7e 100644
--- a/javascripts/core/timestudies.js
+++ b/javascripts/core/timestudies.js
@@ -1,17 +1,5 @@
 "use strict";
 
-const TimeStudyPath = {
-  NONE: 0,
-  NORMAL_DIM: 1,
-  INFINITY_DIM: 2,
-  TIME_DIM: 3,
-  ACTIVE: 4,
-  PASSIVE: 5,
-  IDLE: 6,
-  LIGHT: 7,
-  DARK: 8
-};
-
 const NormalTimeStudies = {};
 
 NormalTimeStudies.pathList = [
diff --git a/javascripts/game.js b/javascripts/game.js
index 18329d269..bf92188cc 100644
--- a/javascripts/game.js
+++ b/javascripts/game.js
@@ -14,7 +14,6 @@ let until10Setting = true;
 function showTab(tabName) {
     tryShowtab(tabName);
     hideLegacyTabs(tabName);
-    resizeCanvas();
     Modal.hide();
     if (document.getElementById("perks").style.display !== "none") network.moveTo({position: {x:0, y:0}, scale: 0.8, offset: {x:0, y:0}})
 }
@@ -400,14 +399,6 @@ function randomStuffThatShouldBeRefactored() {
   if (RealityUpgrades.allBought) $("#celestialsbtn").show() // Rebuyables and that one null value = 6
   else $("#celestialsbtn").hide()
 
-  if (player.realities > 3) {
-      $("#automatorUnlock").hide()
-      $(".automator-container").show()
-  } else {
-      $("#automatorUnlock").show()
-      $(".automator-container").hide()
-  }
-
   ttMaxTimer++;
   if (autoBuyMaxTheorems()) ttMaxTimer = 0;
 
@@ -796,6 +787,7 @@ function gameLoop(diff, options = {}) {
   V.checkForUnlocks();
   Laitela.handleMatterDimensionUnlocks();
   matterDimensionLoop(realDiff);
+  AutomatorBackend.update();
 
   EventHub.dispatch(GameEvent.GAME_TICK_AFTER);
   GameUI.update();
@@ -993,7 +985,6 @@ function showRealityTab(tabName) {
             tab.style.display = 'none';
         }
     }
-    resizeCanvas()
     if (document.getElementById("perks").style.display !== "none") network.moveTo({position: {x:0, y:0}, scale: 0.8, offset: {x:0, y:0}})
 }
 
@@ -1034,7 +1025,6 @@ function init() {
     Tab.dimensions.normal.show();
     GameStorage.load();
     kong.init();
-    TLN.append_line_numbers("automator") // Automator line numbers
 
     //if (typeof kongregate === 'undefined') document.getElementById("shopbtn").style.display = "none"
 }
@@ -1063,7 +1053,6 @@ window.onload = function() {
 
 window.onfocus = function() {
     setShiftKey(false);
-    drawAutomatorTree();
 };
 
 window.onblur = function() {
@@ -1073,7 +1062,6 @@ window.onblur = function() {
 function setShiftKey(isDown) {
   shiftDown = isDown;
   ui.view.shiftDown = isDown;
-  document.getElementById("automatorloadsavetext").textContent = isDown ? "save:" : "load:";
   if (isDown) showPerkLabels()
   else hidePerkLabels()
 }
diff --git a/javascripts/lib/Sortable.min.js b/javascripts/lib/Sortable.min.js
index 4955002d6..3dcf767c3 100644
--- a/javascripts/lib/Sortable.min.js
+++ b/javascripts/lib/Sortable.min.js
@@ -1,3 +1,3 @@
-/*! Sortable 1.8.1 - MIT | git://github.com/SortableJS/Sortable.git */
+/*! Sortable 1.9.0 - MIT | git://github.com/SortableJS/Sortable.git */
 
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n=B(t),o=g(n.width),i=W(t,0,e),r=W(t,1,e),a=i&&B(i),l=r&&B(r),s=a&&g(a.marginLeft)+g(a.marginRight)+Mt(i).width,c=l&&g(l.marginLeft)+g(l.marginRight)+Mt(r).width;return"flex"===n.display?"column"===n.flexDirection||"column-reverse"===n.flexDirection?"vertical":"horizontal":i&&("block"===a.display||"flex"===a.display||"table"===a.display||"grid"===a.display||o<=s&&"none"===n[m]||r&&"none"===n[m]&&o<s+c)?"vertical":"horizontal"},mt=function(t,e){if(!t||!t.getBoundingClientRect)return ht;var n=t,o=!1;do{if(n.clientWidth<n.scrollWidth||n.clientHeight<n.scrollHeight){var i=B(n);if(n.clientWidth<n.scrollWidth&&("auto"==i.overflowX||"scroll"==i.overflowX)||n.clientHeight<n.scrollHeight&&("auto"==i.overflowY||"scroll"==i.overflowY)){if(!n||!n.getBoundingClientRect||n===ut.body)return ht;if(o||e)return n;o=!0}}}while(n=n.parentNode);return ht},C=j(function(n,t,e,o){if(t.scroll){var 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\ No newline at end of file
diff --git a/javascripts/lib/active-line.js b/javascripts/lib/active-line.js
new file mode 100644
index 000000000..c7b14ce07
--- /dev/null
+++ b/javascripts/lib/active-line.js
@@ -0,0 +1,72 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+  var WRAP_CLASS = "CodeMirror-activeline";
+  var BACK_CLASS = "CodeMirror-activeline-background";
+  var GUTT_CLASS = "CodeMirror-activeline-gutter";
+
+  CodeMirror.defineOption("styleActiveLine", false, function(cm, val, old) {
+    var prev = old == CodeMirror.Init ? false : old;
+    if (val == prev) return
+    if (prev) {
+      cm.off("beforeSelectionChange", selectionChange);
+      clearActiveLines(cm);
+      delete cm.state.activeLines;
+    }
+    if (val) {
+      cm.state.activeLines = [];
+      updateActiveLines(cm, cm.listSelections());
+      cm.on("beforeSelectionChange", selectionChange);
+    }
+  });
+
+  function clearActiveLines(cm) {
+    for (var i = 0; i < cm.state.activeLines.length; i++) {
+      cm.removeLineClass(cm.state.activeLines[i], "wrap", WRAP_CLASS);
+      cm.removeLineClass(cm.state.activeLines[i], "background", BACK_CLASS);
+      cm.removeLineClass(cm.state.activeLines[i], "gutter", GUTT_CLASS);
+    }
+  }
+
+  function sameArray(a, b) {
+    if (a.length != b.length) return false;
+    for (var i = 0; i < a.length; i++)
+      if (a[i] != b[i]) return false;
+    return true;
+  }
+
+  function updateActiveLines(cm, ranges) {
+    var active = [];
+    for (var i = 0; i < ranges.length; i++) {
+      var range = ranges[i];
+      var option = cm.getOption("styleActiveLine");
+      if (typeof option == "object" && option.nonEmpty ? range.anchor.line != range.head.line : !range.empty())
+        continue
+      var line = cm.getLineHandleVisualStart(range.head.line);
+      if (active[active.length - 1] != line) active.push(line);
+    }
+    if (sameArray(cm.state.activeLines, active)) return;
+    cm.operation(function() {
+      clearActiveLines(cm);
+      for (var i = 0; i < active.length; i++) {
+        cm.addLineClass(active[i], "wrap", WRAP_CLASS);
+        cm.addLineClass(active[i], "background", BACK_CLASS);
+        cm.addLineClass(active[i], "gutter", GUTT_CLASS);
+      }
+      cm.state.activeLines = active;
+    });
+  }
+
+  function selectionChange(cm, sel) {
+    updateActiveLines(cm, sel.ranges);
+  }
+});
diff --git a/javascripts/lib/chevrotain.min.js b/javascripts/lib/chevrotain.min.js
new file mode 100644
index 000000000..e1582b302
--- /dev/null
+++ b/javascripts/lib/chevrotain.min.js
@@ -0,0 +1,2 @@
+/*! chevrotain - v4.5.0 */
+!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define("chevrotain",[],e):"object"==typeof exports?exports.chevrotain=e():t.chevrotain=e()}("undefined"!=typeof self?self:this,function(){return function(t){var e={};function n(r){if(e[r])return e[r].exports;var i=e[r]={i:r,l:!1,exports:{}};return t[r].call(i.exports,i,i.exports,n),i.l=!0,i.exports}return n.m=t,n.c=e,n.d=function(t,e,r){n.o(t,e)||Object.defineProperty(t,e,{enumerable:!0,get:r})},n.r=function(t){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(t,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(t,"__esModule",{value:!0})},n.t=function(t,e){if(1&e&&(t=n(t)),8&e)return t;if(4&e&&"object"==typeof t&&t&&t.__esModule)return t;var r=Object.create(null);if(n.r(r),Object.defineProperty(r,"default",{enumerable:!0,value:t}),2&e&&"string"!=typeof t)for(var i in t)n.d(r,i,function(e){return t[e]}.bind(null,i));return 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e=t.firstRedundant;t.ruleName;return"Redundant input, expecting EOF but found: "+e.image},buildNoViableAltMessage:function(t){var e=t.expectedPathsPerAlt,n=t.actual,i=(t.previous,t.customUserDescription),a=(t.ruleName,"\nbut found: '"+o.first(n).image+"'");if(i)return"Expecting: "+i+a;var s=o.reduce(e,function(t,e){return t.concat(e)},[]),u=o.map(s,function(t){return"["+o.map(t,function(t){return r.tokenLabel(t)}).join(", ")+"]"});return"Expecting: "+("one of these possible Token sequences:\n"+o.map(u,function(t,e){return"  "+(e+1)+". 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r.topProd=e,r.path=n,r.possibleTokTypes=[],r.nextProductionName="",r.nextProductionOccurrence=0,r.found=!1,r.isAtEndOfPath=!1,r}return i(e,t),e.prototype.startWalking=function(){if(this.found=!1,this.path.ruleStack[0]!==this.topProd.name)throw Error("The path does not start with the walker's top Rule!");return this.ruleStack=a.cloneArr(this.path.ruleStack).reverse(),this.occurrenceStack=a.cloneArr(this.path.occurrenceStack).reverse(),this.ruleStack.pop(),this.occurrenceStack.pop(),this.updateExpectedNext(),this.walk(this.topProd),this.possibleTokTypes},e.prototype.walk=function(e,n){void 0===n&&(n=[]),this.found||t.prototype.walk.call(this,e,n)},e.prototype.walkProdRef=function(t,e,n){if(t.referencedRule.name===this.nextProductionName&&t.idx===this.nextProductionOccurrence){var r=e.concat(n);this.updateExpectedNext(),this.walk(t.referencedRule,r)}},e.prototype.updateExpectedNext=function(){a.isEmpty(this.ruleStack)?(this.nextProductionName="",this.nextProductionOccurrence=0,this.isAtEndOfPath=!0):(this.nextProductionName=this.ruleStack.pop(),this.nextProductionOccurrence=this.occurrenceStack.pop())},e}(o.RestWalker);e.AbstractNextPossibleTokensWalker=p;var l=function(t){function e(e,n){var r=t.call(this,e,n)||this;return r.path=n,r.nextTerminalName="",r.nextTerminalOccurrence=0,r.nextTerminalName=s.tokenName(r.path.lastTok),r.nextTerminalOccurrence=r.path.lastTokOccurrence,r}return i(e,t),e.prototype.walkTerminal=function(t,e,n){if(this.isAtEndOfPath&&s.tokenName(t.terminalType)===this.nextTerminalName&&t.idx===this.nextTerminalOccurrence&&!this.found){var r=e.concat(n),i=new c.Flat({definition:r});this.possibleTokTypes=u.first(i),this.found=!0}},e}(p);e.NextAfterTokenWalker=l;var h=function(t){function e(e,n){var r=t.call(this)||this;return r.topRule=e,r.occurrence=n,r.result={token:void 0,occurrence:void 0,isEndOfRule:void 0},r}return i(e,t),e.prototype.startWalking=function(){return this.walk(this.topRule),this.result},e}(o.RestWalker);e.AbstractNextTerminalAfterProductionWalker=h;var f=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return i(e,t),e.prototype.walkMany=function(e,n,r){if(e.idx===this.occurrence){var i=a.first(n.concat(r));this.result.isEndOfRule=void 0===i,i instanceof c.Terminal&&(this.result.token=i.terminalType,this.result.occurrence=i.idx)}else t.prototype.walkMany.call(this,e,n,r)},e}(h);e.NextTerminalAfterManyWalker=f;var d=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return i(e,t),e.prototype.walkManySep=function(e,n,r){if(e.idx===this.occurrence){var i=a.first(n.concat(r));this.result.isEndOfRule=void 0===i,i instanceof c.Terminal&&(this.result.token=i.terminalType,this.result.occurrence=i.idx)}else t.prototype.walkManySep.call(this,e,n,r)},e}(h);e.NextTerminalAfterManySepWalker=d;var m=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return i(e,t),e.prototype.walkAtLeastOne=function(e,n,r){if(e.idx===this.occurrence){var i=a.first(n.concat(r));this.result.isEndOfRule=void 0===i,i instanceof c.Terminal&&(this.result.token=i.terminalType,this.result.occurrence=i.idx)}else t.prototype.walkAtLeastOne.call(this,e,n,r)},e}(h);e.NextTerminalAfterAtLeastOneWalker=m;var E=function(t){function e(){return null!==t&&t.apply(this,arguments)||this}return i(e,t),e.prototype.walkAtLeastOneSep=function(e,n,r){if(e.idx===this.occurrence){var i=a.first(n.concat(r));this.result.isEndOfRule=void 0===i,i instanceof c.Terminal&&(this.result.token=i.terminalType,this.result.occurrence=i.idx)}else t.prototype.walkAtLeastOneSep.call(this,e,n,r)},e}(h);function T(t,e,n,r){var i=a.cloneArr(n);i.push(t.name);var o=a.cloneArr(r);return o.push(1),{idx:e,def:t.definition,ruleStack:i,occurrenceStack:o}}e.NextTerminalAfterAtLeastOneSepWalker=E,e.possiblePathsFrom=function t(e,n,r){void 0===r&&(r=[]),r=a.cloneArr(r);var i=[],o=0;function s(s){var u=t(s.concat(a.drop(e,o+1)),n,r);return i.concat(u)}for(;r.length<n&&o<e.length;){var u=e[o];if(u instanceof c.Flat)return s(u.definition);if(u instanceof c.NonTerminal)return s(u.definition);if(u instanceof c.Option)i=s(u.definition);else{if(u instanceof c.RepetitionMandatory)return s(p=u.definition.concat([new c.Repetition({definition:u.definition})]));if(u instanceof c.RepetitionMandatoryWithSeparator)return s(p=[new c.Flat({definition:u.definition}),new c.Repetition({definition:[new c.Terminal({terminalType:u.separator})].concat(u.definition)})]);if(u instanceof c.RepetitionWithSeparator){var p=u.definition.concat([new c.Repetition({definition:[new c.Terminal({terminalType:u.separator})].concat(u.definition)})]);i=s(p)}else if(u instanceof c.Repetition)p=u.definition.concat([new c.Repetition({definition:u.definition})]),i=s(p);else{if(u instanceof c.Alternation)return a.forEach(u.definition,function(t){i=s(t.definition)}),i;if(!(u instanceof c.Terminal))throw Error("non exhaustive match");r.push(u.terminalType)}}o++}return i.push({partialPath:r,suffixDef:a.drop(e,o)}),i},e.nextPossibleTokensAfter=function(t,e,n,r){var i=["EXIT_NONE_TERMINAL"],o=!1,s=e.length,u=s-r-1,p=[],l=[];for(l.push({idx:-1,def:t,ruleStack:[],occurrenceStack:[]});!a.isEmpty(l);){var h=l.pop();if("EXIT_ALTERNATIVE"!==h){var f=h.def,d=h.idx,m=h.ruleStack,E=h.occurrenceStack;if(!a.isEmpty(f)){var y=f[0];if("EXIT_NONE_TERMINAL"===y){var v={idx:d,def:a.drop(f),ruleStack:a.dropRight(m),occurrenceStack:a.dropRight(E)};l.push(v)}else if(y instanceof c.Terminal)if(d<s-1){var g=d+1;n(e[g],y.terminalType)&&(v={idx:g,def:a.drop(f),ruleStack:m,occurrenceStack:E},l.push(v))}else{if(d!==s-1)throw Error("non exhaustive match");p.push({nextTokenType:y.terminalType,nextTokenOccurrence:y.idx,ruleStack:m,occurrenceStack:E}),o=!0}else if(y instanceof c.NonTerminal){var R=a.cloneArr(m);R.push(y.nonTerminalName);var _=a.cloneArr(E);_.push(y.idx),v={idx:d,def:y.definition.concat(i,a.drop(f)),ruleStack:R,occurrenceStack:_},l.push(v)}else if(y instanceof c.Option){var A={idx:d,def:a.drop(f),ruleStack:m,occurrenceStack:E};l.push(A),l.push("EXIT_ALTERNATIVE");var N={idx:d,def:y.definition.concat(a.drop(f)),ruleStack:m,occurrenceStack:E};l.push(N)}else if(y instanceof c.RepetitionMandatory){var O=new c.Repetition({definition:y.definition,idx:y.idx});v={idx:d,def:y.definition.concat([O],a.drop(f)),ruleStack:m,occurrenceStack:E},l.push(v)}else if(y instanceof c.RepetitionMandatoryWithSeparator){var S=new c.Terminal({terminalType:y.separator});O=new c.Repetition({definition:[S].concat(y.definition),idx:y.idx}),v={idx:d,def:y.definition.concat([O],a.drop(f)),ruleStack:m,occurrenceStack:E},l.push(v)}else if(y instanceof c.RepetitionWithSeparator){A={idx:d,def:a.drop(f),ruleStack:m,occurrenceStack:E},l.push(A),l.push("EXIT_ALTERNATIVE"),S=new c.Terminal({terminalType:y.separator});var I=new c.Repetition({definition:[S].concat(y.definition),idx:y.idx});N={idx:d,def:y.definition.concat([I],a.drop(f)),ruleStack:m,occurrenceStack:E},l.push(N)}else if(y instanceof c.Repetition)A={idx:d,def:a.drop(f),ruleStack:m,occurrenceStack:E},l.push(A),l.push("EXIT_ALTERNATIVE"),I=new c.Repetition({definition:y.definition,idx:y.idx}),N={idx:d,def:y.definition.concat([I],a.drop(f)),ruleStack:m,occurrenceStack:E},l.push(N);else if(y instanceof c.Alternation)for(var L=y.definition.length-1;L>=0;L--){var k={idx:d,def:y.definition[L].definition.concat(a.drop(f)),ruleStack:m,occurrenceStack:E};l.push(k),l.push("EXIT_ALTERNATIVE")}else if(y instanceof c.Flat)l.push({idx:d,def:y.definition.concat(a.drop(f)),ruleStack:m,occurrenceStack:E});else{if(!(y instanceof c.Rule))throw Error("non exhaustive match");l.push(T(y,d,m,E))}}}else o&&a.last(l).idx<=u&&l.pop()}return p}},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var r=n(0),i=n(1),o=function(){function t(){}return t.prototype.walk=function(t,e){var n=this;void 0===e&&(e=[]),r.forEach(t.definition,function(o,a){var s=r.drop(t.definition,a+1);if(o instanceof i.NonTerminal)n.walkProdRef(o,s,e);else if(o instanceof i.Terminal)n.walkTerminal(o,s,e);else if(o instanceof i.Flat)n.walkFlat(o,s,e);else if(o instanceof i.Option)n.walkOption(o,s,e);else if(o instanceof i.RepetitionMandatory)n.walkAtLeastOne(o,s,e);else if(o instanceof i.RepetitionMandatoryWithSeparator)n.walkAtLeastOneSep(o,s,e);else if(o instanceof i.RepetitionWithSeparator)n.walkManySep(o,s,e);else if(o instanceof i.Repetition)n.walkMany(o,s,e);else{if(!(o instanceof i.Alternation))throw Error("non exhaustive match");n.walkOr(o,s,e)}})},t.prototype.walkTerminal=function(t,e,n){},t.prototype.walkProdRef=function(t,e,n){},t.prototype.walkFlat=function(t,e,n){var r=e.concat(n);this.walk(t,r)},t.prototype.walkOption=function(t,e,n){var r=e.concat(n);this.walk(t,r)},t.prototype.walkAtLeastOne=function(t,e,n){var r=[new i.Option({definition:t.definition})].concat(e,n);this.walk(t,r)},t.prototype.walkAtLeastOneSep=function(t,e,n){var r=a(t,e,n);this.walk(t,r)},t.prototype.walkMany=function(t,e,n){var r=[new i.Option({definition:t.definition})].concat(e,n);this.walk(t,r)},t.prototype.walkManySep=function(t,e,n){var r=a(t,e,n);this.walk(t,r)},t.prototype.walkOr=function(t,e,n){var o=this,a=e.concat(n);r.forEach(t.definition,function(t){var e=new i.Flat({definition:[t]});o.walk(e,a)})},t}();function a(t,e,n){return[new i.Option({definition:[new i.Terminal({terminalType:t.separator})].concat(t.definition)})].concat(e,n)}e.RestWalker=o},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var r=n(27),i=n(0),o=n(7),a=n(20);!function(t){t[t.MISSING_PATTERN=0]="MISSING_PATTERN",t[t.INVALID_PATTERN=1]="INVALID_PATTERN",t[t.EOI_ANCHOR_FOUND=2]="EOI_ANCHOR_FOUND",t[t.UNSUPPORTED_FLAGS_FOUND=3]="UNSUPPORTED_FLAGS_FOUND",t[t.DUPLICATE_PATTERNS_FOUND=4]="DUPLICATE_PATTERNS_FOUND",t[t.INVALID_GROUP_TYPE_FOUND=5]="INVALID_GROUP_TYPE_FOUND",t[t.PUSH_MODE_DOES_NOT_EXIST=6]="PUSH_MODE_DOES_NOT_EXIST",t[t.MULTI_MODE_LEXER_WITHOUT_DEFAULT_MODE=7]="MULTI_MODE_LEXER_WITHOUT_DEFAULT_MODE",t[t.MULTI_MODE_LEXER_WITHOUT_MODES_PROPERTY=8]="MULTI_MODE_LEXER_WITHOUT_MODES_PROPERTY",t[t.MULTI_MODE_LEXER_DEFAULT_MODE_VALUE_DOES_NOT_EXIST=9]="MULTI_MODE_LEXER_DEFAULT_MODE_VALUE_DOES_NOT_EXIST",t[t.LEXER_DEFINITION_CANNOT_CONTAIN_UNDEFINED=10]="LEXER_DEFINITION_CANNOT_CONTAIN_UNDEFINED",t[t.SOI_ANCHOR_FOUND=11]="SOI_ANCHOR_FOUND",t[t.EMPTY_MATCH_PATTERN=12]="EMPTY_MATCH_PATTERN",t[t.NO_LINE_BREAKS_FLAGS=13]="NO_LINE_BREAKS_FLAGS",t[t.UNREACHABLE_PATTERN=14]="UNREACHABLE_PATTERN",t[t.IDENTIFY_TERMINATOR=15]="IDENTIFY_TERMINATOR",t[t.CUSTOM_LINE_BREAK=16]="CUSTOM_LINE_BREAK"}(e.LexerDefinitionErrorType||(e.LexerDefinitionErrorType={}));var s={deferDefinitionErrorsHandling:!1,positionTracking:"full",lineTerminatorsPattern:/\n|\r\n?/g,lineTerminatorCharacters:["\n","\r"],ensureOptimizations:!1,safeMode:!1,errorMessageProvider:a.defaultLexerErrorProvider};Object.freeze(s);var u=function(){function t(t,e){void 0===e&&(e=s);var n=this;if(this.lexerDefinition=t,this.lexerDefinitionErrors=[],this.lexerDefinitionWarning=[],this.patternIdxToConfig={},this.charCodeToPatternIdxToConfig={},this.modes=[],this.emptyGroups={},this.config=void 0,this.trackStartLines=!0,this.trackEndLines=!0,this.hasCustom=!1,this.canModeBeOptimized={},"boolean"==typeof e)throw Error("The second argument to the Lexer constructor is now an ILexerConfig Object.\na boolean 2nd argument is no longer supported");if(this.config=i.merge(s,e),this.config.lineTerminatorsPattern===s.lineTerminatorsPattern)this.config.lineTerminatorsPattern=r.LineTerminatorOptimizedTester;else if(this.config.lineTerminatorCharacters===s.lineTerminatorCharacters)throw Error("Error: Missing <lineTerminatorCharacters> property on the Lexer config.\n\tFor details See: https://sap.github.io/chevrotain/docs/guide/resolving_lexer_errors.html#MISSING_LINE_TERM_CHARS");if(e.safeMode&&e.ensureOptimizations)throw Error('"safeMode" and "ensureOptimizations" flags are mutually exclusive.');this.trackStartLines=/full|onlyStart/i.test(this.config.positionTracking),this.trackEndLines=/full/i.test(this.config.positionTracking);var a,u=!0;i.isArray(t)?((a={modes:{}}).modes[r.DEFAULT_MODE]=i.cloneArr(t),a[r.DEFAULT_MODE]=r.DEFAULT_MODE):(u=!1,a=i.cloneObj(t)),this.lexerDefinitionErrors=this.lexerDefinitionErrors.concat(r.performRuntimeChecks(a,this.trackStartLines,this.config.lineTerminatorCharacters)),this.lexerDefinitionWarning=this.lexerDefinitionWarning.concat(r.performWarningRuntimeChecks(a,this.trackStartLines,this.config.lineTerminatorCharacters)),a.modes=a.modes?a.modes:{},i.forEach(a.modes,function(t,e){a.modes[e]=i.reject(t,function(t){return i.isUndefined(t)})});var c=i.keys(a.modes);if(i.forEach(a.modes,function(t,a){if(n.modes.push(a),n.lexerDefinitionErrors=n.lexerDefinitionErrors.concat(r.validatePatterns(t,c)),i.isEmpty(n.lexerDefinitionErrors)){o.augmentTokenTypes(t);var s=r.analyzeTokenTypes(t,{lineTerminatorCharacters:n.config.lineTerminatorCharacters,positionTracking:e.positionTracking,ensureOptimizations:e.ensureOptimizations,safeMode:e.safeMode});n.patternIdxToConfig[a]=s.patternIdxToConfig,n.charCodeToPatternIdxToConfig[a]=s.charCodeToPatternIdxToConfig,n.emptyGroups=i.merge(n.emptyGroups,s.emptyGroups),n.hasCustom=s.hasCustom||n.hasCustom,n.canModeBeOptimized[a]=s.canBeOptimized}}),this.defaultMode=a.defaultMode,!i.isEmpty(this.lexerDefinitionErrors)&&!this.config.deferDefinitionErrorsHandling){var p=i.map(this.lexerDefinitionErrors,function(t){return t.message}).join("-----------------------\n");throw new Error("Errors detected in definition of Lexer:\n"+p)}if(i.forEach(this.lexerDefinitionWarning,function(t){i.PRINT_WARNING(t.message)}),r.SUPPORT_STICKY?(this.chopInput=i.IDENTITY,this.match=this.matchWithTest):(this.updateLastIndex=i.NOOP,this.match=this.matchWithExec),u&&(this.handleModes=i.NOOP),!1===this.trackStartLines&&(this.computeNewColumn=i.IDENTITY),!1===this.trackEndLines&&(this.updateTokenEndLineColumnLocation=i.NOOP),/full/i.test(this.config.positionTracking))this.createTokenInstance=this.createFullToken;else if(/onlyStart/i.test(this.config.positionTracking))this.createTokenInstance=this.createStartOnlyToken;else{if(!/onlyOffset/i.test(this.config.positionTracking))throw Error('Invalid <positionTracking> config option: "'+this.config.positionTracking+'"');this.createTokenInstance=this.createOffsetOnlyToken}this.hasCustom?this.addToken=this.addTokenUsingPush:this.addToken=this.addTokenUsingMemberAccess;var l=i.reduce(this.canModeBeOptimized,function(t,e,n){return!1===e&&t.push(n),t},[]);if(e.ensureOptimizations&&!i.isEmpty(l))throw Error("Lexer Modes: < "+l.join(", ")+' > cannot be optimized.\n\t Disable the "ensureOptimizations" lexer config flag to silently ignore this and run the lexer in an un-optimized mode.\n\t Or inspect the console log for details on how to resolve these issues.')}return t.prototype.tokenize=function(t,e){if(void 0===e&&(e=this.defaultMode),!i.isEmpty(this.lexerDefinitionErrors)){var n=i.map(this.lexerDefinitionErrors,function(t){return t.message}).join("-----------------------\n");throw new Error("Unable to Tokenize because Errors detected in definition of Lexer:\n"+n)}return this.tokenizeInternal(t,e)},t.prototype.tokenizeInternal=function(t,e){var n,o,a,s,u,c,p,l,h,f,d,m,E=this,T=t,y=T.length,v=0,g=0,R=this.hasCustom?0:Math.floor(t.length/10),_=new Array(R),A=[],N=this.trackStartLines?1:void 0,O=this.trackStartLines?1:void 0,S=r.cloneEmptyGroups(this.emptyGroups),I=this.trackStartLines,L=this.config.lineTerminatorsPattern,k=0,P=[],x=[],C=[],M=[];Object.freeze(M);var F,b=void 0,D=function(t){if(1===C.length&&void 0===t.tokenType.PUSH_MODE){var e=E.config.errorMessageProvider.buildUnableToPopLexerModeMessage(t);A.push({offset:t.startOffset,line:void 0!==t.startLine?t.startLine:void 0,column:void 0!==t.startColumn?t.startColumn:void 0,length:t.image.length,message:e})}else{C.pop();var n=i.last(C);P=E.patternIdxToConfig[n],x=E.charCodeToPatternIdxToConfig[n],k=P.length;var r=E.canModeBeOptimized[n]&&!1===E.config.safeMode;b=x&&r?function(t){var e=x[t];return void 0===e?M:e}:function(){return P}}};function w(t){C.push(t),x=this.charCodeToPatternIdxToConfig[t],P=this.patternIdxToConfig[t],k=P.length,k=P.length;var e=this.canModeBeOptimized[t]&&!1===this.config.safeMode;b=x&&e?function(t){var e=x[t];return void 0===e?M:e}:function(){return P}}for(w.call(this,e);v<y;){u=null;var U=T.charCodeAt(v),G=b(U),B=G.length;for(n=0;n<B;n++){var K=(F=G[n]).pattern;if(!1!==(Z=F.short)?U===Z&&(u=K):!0===F.isCustom?u=null!==(m=K.exec(T,v,_,S))?m[0]:m:(this.updateLastIndex(K,v),u=this.match(K,t,v)),null!==u){if(void 0!==(s=F.longerAlt)){var W=P[s],j=W.pattern;!0===W.isCustom?a=null!==(m=j.exec(T,v,_,S))?m[0]:m:(this.updateLastIndex(j,v),a=this.match(j,t,v)),a&&a.length>u.length&&(u=a,F=W)}break}}if(null!==u){if(c=u.length,void 0!==(p=F.group)&&(l=F.tokenTypeIdx,h=this.createTokenInstance(u,v,l,F.tokenType,N,O,c),!1===p?g=this.addToken(_,g,h):S[p].push(h)),t=this.chopInput(t,c),v+=c,O=this.computeNewColumn(O,c),!0===I&&!0===F.canLineTerminator){var V=0,Y=void 0,H=void 0;L.lastIndex=0;do{!0===(Y=L.test(u))&&(H=L.lastIndex-1,V++)}while(Y);0!==V&&(N+=V,O=c-H,this.updateTokenEndLineColumnLocation(h,p,H,V,N,O,c))}this.handleModes(F,D,w,h)}else{for(var X=v,z=N,q=O,$=!1;!$&&v<y;)for(T.charCodeAt(v),t=this.chopInput(t,1),v++,o=0;o<k;o++){var Z,Q=P[o];K=Q.pattern;if(!1!==(Z=Q.short)?T.charCodeAt(v)===Z&&($=!0):!0===Q.isCustom?$=null!==K.exec(T,v,_,S):(this.updateLastIndex(K,v),$=null!==K.exec(t)),!0===$)break}f=v-X,d=this.config.errorMessageProvider.buildUnexpectedCharactersMessage(T,X,f,z,q),A.push({offset:X,line:z,column:q,length:f,message:d})}}return this.hasCustom||(_.length=g),{tokens:_,groups:S,errors:A}},t.prototype.handleModes=function(t,e,n,r){if(!0===t.pop){var i=t.push;e(r),void 0!==i&&n.call(this,i)}else void 0!==t.push&&n.call(this,t.push)},t.prototype.chopInput=function(t,e){return t.substring(e)},t.prototype.updateLastIndex=function(t,e){t.lastIndex=e},t.prototype.updateTokenEndLineColumnLocation=function(t,e,n,r,i,o,a){var s,u;void 0!==e&&(u=(s=n===a-1)?-1:0,1===r&&!0===s||(t.endLine=i+u,t.endColumn=o-1-u))},t.prototype.computeNewColumn=function(t,e){return t+e},t.prototype.createTokenInstance=function(){for(var t=[],e=0;e<arguments.length;e++)t[e]=arguments[e];return null},t.prototype.createOffsetOnlyToken=function(t,e,n,r){return{image:t,startOffset:e,tokenTypeIdx:n,tokenType:r}},t.prototype.createStartOnlyToken=function(t,e,n,r,i,o){return{image:t,startOffset:e,startLine:i,startColumn:o,tokenTypeIdx:n,tokenType:r}},t.prototype.createFullToken=function(t,e,n,r,i,o,a){return{image:t,startOffset:e,endOffset:e+a-1,startLine:i,endLine:i,startColumn:o,endColumn:o+a-1,tokenTypeIdx:n,tokenType:r}},t.prototype.addToken=function(t,e,n){return 666},t.prototype.addTokenUsingPush=function(t,e,n){return t.push(n),e},t.prototype.addTokenUsingMemberAccess=function(t,e,n){return t[e]=n,++e},t.prototype.match=function(t,e,n){return null},t.prototype.matchWithTest=function(t,e,n){return!0===t.test(e)?e.substring(n,t.lastIndex):null},t.prototype.matchWithExec=function(t,e){var n=t.exec(e);return null!==n?n[0]:n},t.SKIPPED="This marks a skipped Token pattern, this means each token identified by it willbe consumed and then thrown into oblivion, this can be used to for example to completely ignore whitespace.",t.NA=/NOT_APPLICABLE/,t}();e.Lexer=u},function(t,e,n){"use strict";var r,i=this&&this.__extends||(r=function(t,e){return(r=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var n in e)e.hasOwnProperty(n)&&(t[n]=e[n])})(t,e)},function(t,e){function n(){this.constructor=t}r(t,e),t.prototype=null===e?Object.create(e):(n.prototype=e.prototype,new n)});Object.defineProperty(e,"__esModule",{value:!0});var o=n(0),a=n(4),s=n(9),u=n(1),c=n(5);e.addTerminalToCst=function(t,e,n){void 0===t.children[n]?t.children[n]=[e]:t.children[n].push(e)},e.addNoneTerminalToCst=function(t,e,n){void 0===t.children[e]?t.children[e]=[n]:t.children[e].push(n)};var p=function(t){function e(e){var n=t.call(this)||this;return n.result=[],n.ruleIdx=e,n}return i(e,t),e.prototype.collectNamedDSLMethod=function(t,e,n){if(!o.isUndefined(t.name)){var r=void 0;if(t instanceof u.Option||t instanceof u.Repetition||t instanceof u.RepetitionMandatory||t instanceof u.Alternation)r=new e({definition:t.definition,idx:t.idx});else{if(!(t instanceof u.RepetitionMandatoryWithSeparator||t instanceof u.RepetitionWithSeparator))throw Error("non exhaustive match");r=new e({definition:t.definition,idx:t.idx,separator:t.separator})}var 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n=this;if(!this.canTokenTypeBeInsertedInRecovery(t))return!1;if(i.isEmpty(e))return!1;var r=this.LA(1);return void 0!==i.find(e,function(t){return n.tokenMatcher(r,t)})},t.prototype.canRecoverWithSingleTokenDeletion=function(t){return this.tokenMatcher(this.LA(2),t)},t.prototype.isInCurrentRuleReSyncSet=function(t){var e=this.getCurrFollowKey(),n=this.getFollowSetFromFollowKey(e);return i.contains(n,t)},t.prototype.findReSyncTokenType=function(){for(var t=this.flattenFollowSet(),e=this.LA(1),n=2;;){var r=e.tokenType;if(i.contains(t,r))return r;e=this.LA(n),n++}},t.prototype.getCurrFollowKey=function(){if(1===this.RULE_STACK.length)return e.EOF_FOLLOW_KEY;var t=this.getLastExplicitRuleShortName(),n=this.getLastExplicitRuleOccurrenceIndex(),r=this.getPreviousExplicitRuleShortName();return{ruleName:this.shortRuleNameToFullName(t),idxInCallingRule:n,inRule:this.shortRuleNameToFullName(r)}},t.prototype.buildFullFollowKeyStack=function(){var t=this,n=this.RULE_STACK,r=this.RULE_OCCURRENCE_STACK;return i.isEmpty(this.LAST_EXPLICIT_RULE_STACK)||(n=i.map(this.LAST_EXPLICIT_RULE_STACK,function(e){return t.RULE_STACK[e]}),r=i.map(this.LAST_EXPLICIT_RULE_STACK,function(e){return t.RULE_OCCURRENCE_STACK[e]})),i.map(n,function(i,o){return 0===o?e.EOF_FOLLOW_KEY:{ruleName:t.shortRuleNameToFullName(i),idxInCallingRule:r[o],inRule:t.shortRuleNameToFullName(n[o-1])}})},t.prototype.flattenFollowSet=function(){var t=this,e=i.map(this.buildFullFollowKeyStack(),function(e){return t.getFollowSetFromFollowKey(e)});return i.flatten(e)},t.prototype.getFollowSetFromFollowKey=function(t){if(t===e.EOF_FOLLOW_KEY)return[r.EOF];var n=t.ruleName+t.idxInCallingRule+a.IN+t.inRule;return this.resyncFollows.get(n)},t.prototype.addToResyncTokens=function(t,e){return this.tokenMatcher(t,r.EOF)||e.push(t),e},t.prototype.reSyncTo=function(t){for(var e=[],n=this.LA(1);!1===this.tokenMatcher(n,t);)n=this.SKIP_TOKEN(),this.addToResyncTokens(n,e);return i.dropRight(e)},t.prototype.attemptInRepetitionRecovery=function(t,e,n,r,i,o){},t.prototype.getCurrentGrammarPath=function(t,e){return{ruleStack:this.getHumanReadableRuleStack(),occurrenceStack:i.cloneArr(this.RULE_OCCURRENCE_STACK),lastTok:t,lastTokOccurrence:e}},t.prototype.getHumanReadableRuleStack=function(){var t=this;return i.isEmpty(this.LAST_EXPLICIT_RULE_STACK)?i.map(this.RULE_STACK,function(e){return t.shortRuleNameToFullName(e)}):i.map(this.LAST_EXPLICIT_RULE_STACK,function(e){return t.shortRuleNameToFullName(t.RULE_STACK[e])})},t}();function l(t,e,n,i,o,a){var s=this.getKeyForAutomaticLookahead(i,o),u=this.firstAfterRepMap.get(s);if(void 0===u){var c=this.getCurrRuleFullName();u=new a(this.getGAstProductions().get(c),o).startWalking(),this.firstAfterRepMap.put(s,u)}var p=u.token,l=u.occurrence,h=u.isEndOfRule;1===this.RULE_STACK.length&&h&&void 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RegExp("(?:)").sticky,e.disableSticky=function(){e.SUPPORT_STICKY=!1},e.enableSticky=function(){e.SUPPORT_STICKY=!0},e.analyzeTokenTypes=function(t,n){n=u.defaults(n,{useSticky:e.SUPPORT_STICKY,debug:!1,safeMode:!1,positionTracking:"full",lineTerminatorCharacters:["\r","\n"]});var r=u.reject(t,function(t){return t[l]===s.Lexer.NA}),i=!1,o=u.map(r,function(t){var e=t[l];if(u.isRegExp(e)){var r=e.source;return 1===r.length&&"^"!==r&&"$"!==r&&"."!==r?r:2!==r.length||"\\"!==r[0]||u.contains(["d","D","s","S","t","r","n","t","0","c","b","B","f","v","w","W"],r[1])?n.useSticky?O(e):N(e):r[1]}if(u.isFunction(e))return i=!0,{exec:e};if(u.has(e,"exec"))return i=!0,e;if("string"==typeof e){if(1===e.length)return e;var o=e.replace(/[\\^$.*+?()[\]{}|]/g,"\\$&"),a=new RegExp(o);return n.useSticky?O(a):N(a)}throw Error("non exhaustive match")}),p=u.map(r,function(t){return t.tokenTypeIdx}),h=u.map(r,function(t){var e=t.GROUP;if(e!==s.Lexer.SKIPPED){if(u.isString(e))return e;if(u.isUndefined(e))return!1;throw Error("non exhaustive match")}}),f=u.map(r,function(t){var e=t.LONGER_ALT;if(e)return u.indexOf(r,e)}),d=u.map(r,function(t){return t.PUSH_MODE}),m=u.map(r,function(t){return u.has(t,"POP_MODE")}),E=P(n.lineTerminatorCharacters),T=u.map(r,function(t){return!1});"onlyOffset"!==n.positionTracking&&(T=u.map(r,function(t){return u.has(t,"LINE_BREAKS")?t.LINE_BREAKS:!1===L(t,E)?c.canMatchCharCode(E,t.PATTERN):void 0}));var y=u.map(r,S),v=u.map(o,I),g=u.reduce(r,function(t,e){var n=e.GROUP;return u.isString(n)&&n!==s.Lexer.SKIPPED&&(t[n]=[]),t},{}),R=u.map(o,function(t,e){return{pattern:o[e],longerAlt:f[e],canLineTerminator:T[e],isCustom:y[e],short:v[e],group:h[e],push:d[e],pop:m[e],tokenTypeIdx:p[e],tokenType:r[e]}});function _(t,e,n){void 0===t[e]&&(t[e]=[]),t[e].push(n)}var A=!0,k=[];return n.safeMode||(k=u.reduce(r,function(t,e,r){if("string"==typeof e.PATTERN){var i=e.PATTERN.charCodeAt(0);_(t,i,R[r])}else if(u.isArray(e.START_CHARS_HINT))u.forEach(e.START_CHARS_HINT,function(e){var n="string"==typeof e?e.charCodeAt(0):e;_(t,n,R[r])});else if(u.isRegExp(e.PATTERN))if(e.PATTERN.unicode)A=!1,n.ensureOptimizations&&u.PRINT_ERROR(c.failedOptimizationPrefixMsg+"\tUnable to analyze < "+e.PATTERN.toString()+" > pattern.\n\tThe regexp unicode flag is not currently supported by the regexp-to-ast library.\n\tThis will disable the lexer's first char optimizations.\n\tFor details See: https://sap.github.io/chevrotain/docs/guide/resolving_lexer_errors.html#UNICODE_OPTIMIZE");else{var o=c.getStartCodes(e.PATTERN,n.ensureOptimizations);u.isEmpty(o)&&(A=!1),u.forEach(o,function(e){_(t,e,R[r])})}else n.ensureOptimizations&&u.PRINT_ERROR(c.failedOptimizationPrefixMsg+"\tTokenType: <"+a.tokenName(e)+"> is using a custom token pattern without providing <start_chars_hint> parameter.\n\tThis will disable the lexer's first char optimizations.\n\tFor details See: https://sap.github.io/chevrotain/docs/guide/resolving_lexer_errors.html#CUSTOM_OPTIMIZE"),A=!1;return t},[])),A&&k.length<65536&&(k=u.packArray(k)),{emptyGroups:g,patternIdxToConfig:R,charCodeToPatternIdxToConfig:k,hasCustom:i,canBeOptimized:A}},e.validatePatterns=function(t,e){var n=[],r=h(t);n=n.concat(r.errors);var i=f(r.valid),o=i.valid;return n=(n=(n=(n=(n=n.concat(i.errors)).concat(function(t){var e=[],n=u.filter(t,function(t){return u.isRegExp(t[l])});return e=(e=(e=(e=(e=e.concat(m(n))).concat(y(n))).concat(v(n))).concat(g(n))).concat(E(n))}(o))).concat(R(o))).concat(_(o,e))).concat(A(o))},e.findMissingPatterns=h,e.findInvalidPatterns=f;var d=/[^\\][\$]/;function m(t){var e=function(t){function e(){var e=null!==t&&t.apply(this,arguments)||this;return e.found=!1,e}return i(e,t),e.prototype.visitEndAnchor=function(t){this.found=!0},e}(o.BaseRegExpVisitor),n=u.filter(t,function(t){var n=t[l];try{var r=p.pattern(n.toString()),i=new e;return i.visit(r),i.found}catch(t){return d.test(n.source)}});return u.map(n,function(t){return{message:"Unexpected RegExp Anchor Error:\n\tToken Type: ->"+a.tokenName(t)+"<- static 'PATTERN' cannot contain end of input anchor '$'\n\tSee sap.github.io/chevrotain/docs/guide/resolving_lexer_errors.html#ANCHORS\tfor details.",type:s.LexerDefinitionErrorType.EOI_ANCHOR_FOUND,tokenTypes:[t]}})}function E(t){var e=u.filter(t,function(t){return t[l].test("")});return u.map(e,function(t){return{message:"Token Type: ->"+a.tokenName(t)+"<- static 'PATTERN' must not match an empty string",type:s.LexerDefinitionErrorType.EMPTY_MATCH_PATTERN,tokenTypes:[t]}})}e.findEndOfInputAnchor=m,e.findEmptyMatchRegExps=E;var T=/[^\\[][\^]|^\^/;function y(t){var e=function(t){function e(){var e=null!==t&&t.apply(this,arguments)||this;return e.found=!1,e}return i(e,t),e.prototype.visitStartAnchor=function(t){this.found=!0},e}(o.BaseRegExpVisitor),n=u.filter(t,function(t){var n=t[l];try{var r=p.pattern(n.toString()),i=new e;return i.visit(r),i.found}catch(t){return T.test(n.source)}});return u.map(n,function(t){return{message:"Unexpected RegExp Anchor Error:\n\tToken Type: ->"+a.tokenName(t)+"<- static 'PATTERN' cannot contain start of input anchor '^'\n\tSee https://sap.github.io/chevrotain/docs/guide/resolving_lexer_errors.html#ANCHORS\tfor details.",type:s.LexerDefinitionErrorType.SOI_ANCHOR_FOUND,tokenTypes:[t]}})}function v(t){var e=u.filter(t,function(t){var e=t[l];return e instanceof RegExp&&(e.multiline||e.global)});return u.map(e,function(t){return{message:"Token Type: ->"+a.tokenName(t)+"<- static 'PATTERN' may NOT contain global('g') or multiline('m')",type:s.LexerDefinitionErrorType.UNSUPPORTED_FLAGS_FOUND,tokenTypes:[t]}})}function g(t){var e=[],n=u.map(t,function(n){return u.reduce(t,function(t,r){return n.PATTERN.source!==r.PATTERN.source||u.contains(e,r)||r.PATTERN===s.Lexer.NA?t:(e.push(r),t.push(r),t)},[])});n=u.compact(n);var r=u.filter(n,function(t){return t.length>1});return u.map(r,function(t){var e=u.map(t,function(t){return a.tokenName(t)});return{message:"The same RegExp pattern ->"+u.first(t).PATTERN+"<-has been used in all of the following Token Types: "+e.join(", ")+" <-",type:s.LexerDefinitionErrorType.DUPLICATE_PATTERNS_FOUND,tokenTypes:t}})}function R(t){var e=u.filter(t,function(t){if(!u.has(t,"GROUP"))return!1;var e=t.GROUP;return e!==s.Lexer.SKIPPED&&e!==s.Lexer.NA&&!u.isString(e)});return u.map(e,function(t){return{message:"Token Type: ->"+a.tokenName(t)+"<- static 'GROUP' can only be Lexer.SKIPPED/Lexer.NA/A String",type:s.LexerDefinitionErrorType.INVALID_GROUP_TYPE_FOUND,tokenTypes:[t]}})}function _(t,e){var n=u.filter(t,function(t){return void 0!==t.PUSH_MODE&&!u.contains(e,t.PUSH_MODE)});return u.map(n,function(t){return{message:"Token Type: ->"+a.tokenName(t)+"<- static 'PUSH_MODE' value cannot refer to a Lexer Mode ->"+t.PUSH_MODE+"<-which does not exist",type:s.LexerDefinitionErrorType.PUSH_MODE_DOES_NOT_EXIST,tokenTypes:[t]}})}function A(t){var e=[],n=u.reduce(t,function(t,e,n){var r,i=e.PATTERN;return i===s.Lexer.NA?t:(u.isString(i)?t.push({str:i,idx:n,tokenType:e}):u.isRegExp(i)&&(r=i,void 0===u.find([".","\\","[","]","|","^","$","(",")","?","*","+","{"],function(t){return-1!==r.source.indexOf(t)}))&&t.push({str:i.source,idx:n,tokenType:e}),t)},[]);return u.forEach(t,function(t,r){u.forEach(n,function(n){var i=n.str,o=n.idx,c=n.tokenType;if(r<o&&function(t,e){if(u.isRegExp(e)){var n=e.exec(t);return null!==n&&0===n.index}if(u.isFunction(e))return e(t,0,[],{});if(u.has(e,"exec"))return e.exec(t,0,[],{});if("string"==typeof e)return e===t;throw Error("non exhaustive match")}(i,t.PATTERN)){var p="Token: ->"+a.tokenName(c)+"<- can never be matched.\nBecause it appears AFTER the Token Type ->"+a.tokenName(t)+"<-in the lexer's definition.\nSee https://sap.github.io/chevrotain/docs/guide/resolving_lexer_errors.html#UNREACHABLE";e.push({message:p,type:s.LexerDefinitionErrorType.UNREACHABLE_PATTERN,tokenTypes:[t,c]})}})}),e}function N(t){var e=t.ignoreCase?"i":"";return new RegExp("^(?:"+t.source+")",e)}function O(t){var e=t.ignoreCase?"iy":"y";return new RegExp(""+t.source,e)}function S(t){var e=t.PATTERN;if(u.isRegExp(e))return!1;if(u.isFunction(e))return!0;if(u.has(e,"exec"))return!0;if(u.isString(e))return!1;throw Error("non exhaustive match")}function I(t){return!(!u.isString(t)||1!==t.length)&&t.charCodeAt(0)}function L(t,e){if(u.has(t,"LINE_BREAKS"))return!1;if(u.isRegExp(t.PATTERN)){try{c.canMatchCharCode(e,t.PATTERN)}catch(t){return{issue:s.LexerDefinitionErrorType.IDENTIFY_TERMINATOR,errMsg:t.message}}return!1}if(u.isString(t.PATTERN))return!1;if(S(t))return{issue:s.LexerDefinitionErrorType.CUSTOM_LINE_BREAK};throw Error("non exhaustive match")}function k(t,e){if(e.issue===s.LexerDefinitionErrorType.IDENTIFY_TERMINATOR)return"Warning: unable to identify line terminator usage in pattern.\n\tThe problem is in the <"+t.name+"> Token Type\n\t Root cause: "+e.errMsg+".\n\tFor details See: https://sap.github.io/chevrotain/docs/guide/resolving_lexer_errors.html#IDENTIFY_TERMINATOR";if(e.issue===s.LexerDefinitionErrorType.CUSTOM_LINE_BREAK)return"Warning: A Custom Token Pattern should specify the <line_breaks> option.\n\tThe problem is in the <"+t.name+"> Token Type\n\tFor details See: https://sap.github.io/chevrotain/docs/guide/resolving_lexer_errors.html#CUSTOM_LINE_BREAK";throw Error("non exhaustive match")}function P(t){return u.map(t,function(t){return u.isString(t)&&t.length>0?t.charCodeAt(0):t})}e.findStartOfInputAnchor=y,e.findUnsupportedFlags=v,e.findDuplicatePatterns=g,e.findInvalidGroupType=R,e.findModesThatDoNotExist=_,e.findUnreachablePatterns=A,e.addStartOfInput=N,e.addStickyFlag=O,e.performRuntimeChecks=function(t,n,r){var i=[];return u.has(t,e.DEFAULT_MODE)||i.push({message:"A MultiMode Lexer cannot be initialized without a <"+e.DEFAULT_MODE+"> property in its definition\n",type:s.LexerDefinitionErrorType.MULTI_MODE_LEXER_WITHOUT_DEFAULT_MODE}),u.has(t,e.MODES)||i.push({message:"A MultiMode Lexer cannot be initialized without a <"+e.MODES+"> property in its definition\n",type:s.LexerDefinitionErrorType.MULTI_MODE_LEXER_WITHOUT_MODES_PROPERTY}),u.has(t,e.MODES)&&u.has(t,e.DEFAULT_MODE)&&!u.has(t.modes,t.defaultMode)&&i.push({message:"A MultiMode Lexer cannot be initialized with a "+e.DEFAULT_MODE+": <"+t.defaultMode+">which does not exist\n",type:s.LexerDefinitionErrorType.MULTI_MODE_LEXER_DEFAULT_MODE_VALUE_DOES_NOT_EXIST}),u.has(t,e.MODES)&&u.forEach(t.modes,function(t,e){u.forEach(t,function(t,n){u.isUndefined(t)&&i.push({message:"A Lexer cannot be initialized using an undefined Token Type. Mode:<"+e+"> at index: <"+n+">\n",type:s.LexerDefinitionErrorType.LEXER_DEFINITION_CANNOT_CONTAIN_UNDEFINED})})}),i},e.performWarningRuntimeChecks=function(t,e,n){var r=[],i=!1,o=u.compact(u.flatten(u.mapValues(t.modes,function(t){return t}))),a=u.reject(o,function(t){return t[l]===s.Lexer.NA}),p=P(n);return e&&u.forEach(a,function(t){var e=L(t,p);if(!1!==e){var n={message:k(t,e),type:e.issue,tokenType:t};r.push(n)}else u.has(t,"LINE_BREAKS")?!0===t.LINE_BREAKS&&(i=!0):c.canMatchCharCode(p,t.PATTERN)&&(i=!0)}),e&&!i&&r.push({message:"Warning: No LINE_BREAKS Found.\n\tThis Lexer has been defined to track line and column information,\n\tBut none of the Token Types can be identified as matching a line terminator.\n\tSee https://sap.github.io/chevrotain/docs/guide/resolving_lexer_errors.html#LINE_BREAKS \n\tfor details.",type:s.LexerDefinitionErrorType.NO_LINE_BREAKS_FLAGS}),r},e.cloneEmptyGroups=function(t){var e={},n=u.keys(t);return u.forEach(n,function(n){var 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t.prototype.initTreeBuilder=function(t){this.LAST_EXPLICIT_RULE_STACK=[],this.CST_STACK=[],this.outputCst=i.has(t,"outputCst")?t.outputCst:s.DEFAULT_PARSER_CONFIG.outputCst,this.outputCst||(this.cstInvocationStateUpdate=i.NOOP,this.cstFinallyStateUpdate=i.NOOP,this.cstPostTerminal=i.NOOP,this.cstPostNonTerminal=i.NOOP,this.getLastExplicitRuleShortName=this.getLastExplicitRuleShortNameNoCst,this.getPreviousExplicitRuleShortName=this.getPreviousExplicitRuleShortNameNoCst,this.getLastExplicitRuleOccurrenceIndex=this.getLastExplicitRuleOccurrenceIndexNoCst,this.manyInternal=this.manyInternalNoCst,this.orInternal=this.orInternalNoCst,this.optionInternal=this.optionInternalNoCst,this.atLeastOneInternal=this.atLeastOneInternalNoCst,this.manySepFirstInternal=this.manySepFirstInternalNoCst,this.atLeastOneSepFirstInternal=this.atLeastOneSepFirstInternalNoCst)},t.prototype.cstNestedInvocationStateUpdate=function(t,e){this.CST_STACK.push({name:t,fullName:this.shortRuleNameToFull.get(this.getLastExplicitRuleShortName())+t,children:{}})},t.prototype.cstInvocationStateUpdate=function(t,e){this.LAST_EXPLICIT_RULE_STACK.push(this.RULE_STACK.length-1),this.CST_STACK.push({name:t,children:{}})},t.prototype.cstFinallyStateUpdate=function(){this.LAST_EXPLICIT_RULE_STACK.pop(),this.CST_STACK.pop()},t.prototype.cstNestedFinallyStateUpdate=function(){this.CST_STACK.pop()},t.prototype.cstPostTerminal=function(t,e){var n=this.CST_STACK[this.CST_STACK.length-1];r.addTerminalToCst(n,e,t)},t.prototype.cstPostNonTerminal=function(t,e){r.addNoneTerminalToCst(this.CST_STACK[this.CST_STACK.length-1],e,t)},t.prototype.getBaseCstVisitorConstructor=function(){if(i.isUndefined(this.baseCstVisitorConstructor)){var t=o.createBaseSemanticVisitorConstructor(this.className,this.allRuleNames);return this.baseCstVisitorConstructor=t,t}return this.baseCstVisitorConstructor},t.prototype.getBaseCstVisitorConstructorWithDefaults=function(){if(i.isUndefined(this.baseCstVisitorWithDefaultsConstructor)){var t=o.createBaseVisitorConstructorWithDefaults(this.className,this.allRuleNames,this.getBaseCstVisitorConstructor());return this.baseCstVisitorWithDefaultsConstructor=t,t}return this.baseCstVisitorWithDefaultsConstructor},t.prototype.nestedRuleBeforeClause=function(t,e){var n;return void 0!==t.NAME?(n=t.NAME,this.nestedRuleInvocationStateUpdate(n,e),n):void 0},t.prototype.nestedAltBeforeClause=function(t,e,n,r){var i,o=this.getLastExplicitRuleShortName(),s=a.getKeyForAltIndex(o,n,e,r);return void 0!==t.NAME?(i=t.NAME,this.nestedRuleInvocationStateUpdate(i,s),{shortName:s,nestedName:i}):void 0},t.prototype.nestedRuleFinallyClause=function(t,e){var n=this.CST_STACK,i=n[n.length-1];this.nestedRuleFinallyStateUpdate();var o=n[n.length-1];r.addNoneTerminalToCst(o,e,i)},t.prototype.getLastExplicitRuleShortName=function(){var t=this.LAST_EXPLICIT_RULE_STACK[this.LAST_EXPLICIT_RULE_STACK.length-1];return this.RULE_STACK[t]},t.prototype.getLastExplicitRuleShortNameNoCst=function(){var t=this.RULE_STACK;return t[t.length-1]},t.prototype.getPreviousExplicitRuleShortName=function(){var t=this.LAST_EXPLICIT_RULE_STACK[this.LAST_EXPLICIT_RULE_STACK.length-2];return this.RULE_STACK[t]},t.prototype.getPreviousExplicitRuleShortNameNoCst=function(){var t=this.RULE_STACK;return t[t.length-2]},t.prototype.getLastExplicitRuleOccurrenceIndex=function(){var t=this.LAST_EXPLICIT_RULE_STACK[this.LAST_EXPLICIT_RULE_STACK.length-1];return this.RULE_OCCURRENCE_STACK[t]},t.prototype.getLastExplicitRuleOccurrenceIndexNoCst=function(){var t=this.RULE_OCCURRENCE_STACK;return t[t.length-1]},t.prototype.nestedRuleInvocationStateUpdate=function(t,e){this.RULE_OCCURRENCE_STACK.push(1),this.RULE_STACK.push(e),this.cstNestedInvocationStateUpdate(t,e)},t.prototype.nestedRuleFinallyStateUpdate=function(){this.RULE_STACK.pop(),this.RULE_OCCURRENCE_STACK.pop(),this.cstNestedFinallyStateUpdate()},t}();e.TreeBuilder=u},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var r,i=n(0),o=n(4),a=n(11);function s(t,e){for(var n=i.keys(t),r=n.length,o=0;o<r;o++)for(var a=t[n[o]],s=a.length,u=0;u<s;u++){var c=a[u];void 0===c.tokenTypeIdx&&(void 0!==c.fullName?this[c.fullName](c.children,e):this[c.name](c.children,e))}}function u(t,e){var n=c(t,e),r=l(t,e);return n.concat(r)}function c(t,e){var n=i.map(e,function(e){if(!i.isFunction(t[e]))return{msg:"Missing visitor method: <"+e+"> on "+o.functionName(t.constructor)+" CST Visitor.",type:r.MISSING_METHOD,methodName:e}});return i.compact(n)}e.defaultVisit=s,e.createBaseSemanticVisitorConstructor=function(t,e){var n=function(){};return o.defineNameProp(n,t+"BaseSemantics"),(n.prototype={visit:function(t,e){if(i.isArray(t)&&(t=t[0]),!i.isUndefined(t))return void 0!==t.fullName?this[t.fullName](t.children,e):this[t.name](t.children,e)},validateVisitor:function(){var t=u(this,e);if(!i.isEmpty(t)){var n=i.map(t,function(t){return t.msg});throw Error("Errors Detected in CST Visitor <"+o.functionName(this.constructor)+">:\n\t"+n.join("\n\n").replace(/\n/g,"\n\t"))}}}).constructor=n,n._RULE_NAMES=e,n},e.createBaseVisitorConstructorWithDefaults=function(t,e,n){var r=function(){};o.defineNameProp(r,t+"BaseSemanticsWithDefaults");var a=Object.create(n.prototype);return i.forEach(e,function(t){a[t]=s}),(r.prototype=a).constructor=r,r},function(t){t[t.REDUNDANT_METHOD=0]="REDUNDANT_METHOD",t[t.MISSING_METHOD=1]="MISSING_METHOD"}(r=e.CstVisitorDefinitionError||(e.CstVisitorDefinitionError={})),e.validateVisitor=u,e.validateMissingCstMethods=c;var p=["constructor","visit","validateVisitor"];function l(t,e){var n=[];for(var s in t)a.validTermsPattern.test(s)&&i.isFunction(t[s])&&!i.contains(p,s)&&!i.contains(e,s)&&n.push({msg:"Redundant visitor method: <"+s+"> on "+o.functionName(t.constructor)+" CST Visitor\nThere is no Grammar Rule corresponding to this method's name.\nFor utility methods on visitor classes use methods names that do not match /"+a.validTermsPattern.source+"/.",type:r.REDUNDANT_METHOD,methodName:s});return n}e.validateRedundantMethods=l},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var r=n(3),i=function(){function t(){}return t.prototype.initLexerAdapter=function(){this.tokVector=[],this.tokVectorLength=0,this.currIdx=-1},Object.defineProperty(t.prototype,"input",{get:function(){return this.tokVector},set:function(t){this.reset(),this.tokVector=t,this.tokVectorLength=t.length},enumerable:!0,configurable:!0}),t.prototype.SKIP_TOKEN=function(){return this.currIdx<=this.tokVector.length-2?(this.consumeToken(),this.LA(1)):r.END_OF_FILE},t.prototype.LA=function(t){return this.currIdx+t<0||this.tokVectorLength<=this.currIdx+t?r.END_OF_FILE:this.tokVector[this.currIdx+t]},t.prototype.consumeToken=function(){this.currIdx++},t.prototype.exportLexerState=function(){return this.currIdx},t.prototype.importLexerState=function(t){this.currIdx=t},t.prototype.resetLexerState=function(){this.currIdx=-1},t.prototype.moveToTerminatedState=function(){this.currIdx=this.tokVector.length-1},t.prototype.getLexerPosition=function(){return this.exportLexerState()},t}();e.LexerAdapter=i},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var r=n(0),i=n(6),o=n(3),a=n(10),s=n(23),u=n(11),c=n(1),p=function(){function t(){}return t.prototype.CONSUME=function(t,e){return this.consumeInternal(t,0,e)},t.prototype.CONSUME1=function(t,e){return this.consumeInternal(t,1,e)},t.prototype.CONSUME2=function(t,e){return this.consumeInternal(t,2,e)},t.prototype.CONSUME3=function(t,e){return this.consumeInternal(t,3,e)},t.prototype.CONSUME4=function(t,e){return this.consumeInternal(t,4,e)},t.prototype.CONSUME5=function(t,e){return this.consumeInternal(t,5,e)},t.prototype.CONSUME6=function(t,e){return this.consumeInternal(t,6,e)},t.prototype.CONSUME7=function(t,e){return this.consumeInternal(t,7,e)},t.prototype.CONSUME8=function(t,e){return this.consumeInternal(t,8,e)},t.prototype.CONSUME9=function(t,e){return this.consumeInternal(t,9,e)},t.prototype.SUBRULE=function(t,e){return this.subruleInternal(t,0,e)},t.prototype.SUBRULE1=function(t,e){return this.subruleInternal(t,1,e)},t.prototype.SUBRULE2=function(t,e){return this.subruleInternal(t,2,e)},t.prototype.SUBRULE3=function(t,e){return this.subruleInternal(t,3,e)},t.prototype.SUBRULE4=function(t,e){return this.subruleInternal(t,4,e)},t.prototype.SUBRULE5=function(t,e){return this.subruleInternal(t,5,e)},t.prototype.SUBRULE6=function(t,e){return this.subruleInternal(t,6,e)},t.prototype.SUBRULE7=function(t,e){return this.subruleInternal(t,7,e)},t.prototype.SUBRULE8=function(t,e){return this.subruleInternal(t,8,e)},t.prototype.SUBRULE9=function(t,e){return this.subruleInternal(t,9,e)},t.prototype.OPTION=function(t){return this.optionInternal(t,0)},t.prototype.OPTION1=function(t){return this.optionInternal(t,1)},t.prototype.OPTION2=function(t){return this.optionInternal(t,2)},t.prototype.OPTION3=function(t){return this.optionInternal(t,3)},t.prototype.OPTION4=function(t){return this.optionInternal(t,4)},t.prototype.OPTION5=function(t){return this.optionInternal(t,5)},t.prototype.OPTION6=function(t){return this.optionInternal(t,6)},t.prototype.OPTION7=function(t){return this.optionInternal(t,7)},t.prototype.OPTION8=function(t){return this.optionInternal(t,8)},t.prototype.OPTION9=function(t){return this.optionInternal(t,9)},t.prototype.OR=function(t){return this.orInternal(t,0)},t.prototype.OR1=function(t){return this.orInternal(t,1)},t.prototype.OR2=function(t){return this.orInternal(t,2)},t.prototype.OR3=function(t){return this.orInternal(t,3)},t.prototype.OR4=function(t){return this.orInternal(t,4)},t.prototype.OR5=function(t){return this.orInternal(t,5)},t.prototype.OR6=function(t){return this.orInternal(t,6)},t.prototype.OR7=function(t){return this.orInternal(t,7)},t.prototype.OR8=function(t){return this.orInternal(t,8)},t.prototype.OR9=function(t){return this.orInternal(t,9)},t.prototype.MANY=function(t){this.manyInternal(0,t)},t.prototype.MANY1=function(t){this.manyInternal(1,t)},t.prototype.MANY2=function(t){this.manyInternal(2,t)},t.prototype.MANY3=function(t){this.manyInternal(3,t)},t.prototype.MANY4=function(t){this.manyInternal(4,t)},t.prototype.MANY5=function(t){this.manyInternal(5,t)},t.prototype.MANY6=function(t){this.manyInternal(6,t)},t.prototype.MANY7=function(t){this.manyInternal(7,t)},t.prototype.MANY8=function(t){this.manyInternal(8,t)},t.prototype.MANY9=function(t){this.manyInternal(9,t)},t.prototype.MANY_SEP=function(t){this.manySepFirstInternal(0,t)},t.prototype.MANY_SEP1=function(t){this.manySepFirstInternal(1,t)},t.prototype.MANY_SEP2=function(t){this.manySepFirstInternal(2,t)},t.prototype.MANY_SEP3=function(t){this.manySepFirstInternal(3,t)},t.prototype.MANY_SEP4=function(t){this.manySepFirstInternal(4,t)},t.prototype.MANY_SEP5=function(t){this.manySepFirstInternal(5,t)},t.prototype.MANY_SEP6=function(t){this.manySepFirstInternal(6,t)},t.prototype.MANY_SEP7=function(t){this.manySepFirstInternal(7,t)},t.prototype.MANY_SEP8=function(t){this.manySepFirstInternal(8,t)},t.prototype.MANY_SEP9=function(t){this.manySepFirstInternal(9,t)},t.prototype.AT_LEAST_ONE=function(t){this.atLeastOneInternal(0,t)},t.prototype.AT_LEAST_ONE1=function(t){return this.atLeastOneInternal(1,t)},t.prototype.AT_LEAST_ONE2=function(t){this.atLeastOneInternal(2,t)},t.prototype.AT_LEAST_ONE3=function(t){this.atLeastOneInternal(3,t)},t.prototype.AT_LEAST_ONE4=function(t){this.atLeastOneInternal(4,t)},t.prototype.AT_LEAST_ONE5=function(t){this.atLeastOneInternal(5,t)},t.prototype.AT_LEAST_ONE6=function(t){this.atLeastOneInternal(6,t)},t.prototype.AT_LEAST_ONE7=function(t){this.atLeastOneInternal(7,t)},t.prototype.AT_LEAST_ONE8=function(t){this.atLeastOneInternal(8,t)},t.prototype.AT_LEAST_ONE9=function(t){this.atLeastOneInternal(9,t)},t.prototype.AT_LEAST_ONE_SEP=function(t){this.atLeastOneSepFirstInternal(0,t)},t.prototype.AT_LEAST_ONE_SEP1=function(t){this.atLeastOneSepFirstInternal(1,t)},t.prototype.AT_LEAST_ONE_SEP2=function(t){this.atLeastOneSepFirstInternal(2,t)},t.prototype.AT_LEAST_ONE_SEP3=function(t){this.atLeastOneSepFirstInternal(3,t)},t.prototype.AT_LEAST_ONE_SEP4=function(t){this.atLeastOneSepFirstInternal(4,t)},t.prototype.AT_LEAST_ONE_SEP5=function(t){this.atLeastOneSepFirstInternal(5,t)},t.prototype.AT_LEAST_ONE_SEP6=function(t){this.atLeastOneSepFirstInternal(6,t)},t.prototype.AT_LEAST_ONE_SEP7=function(t){this.atLeastOneSepFirstInternal(7,t)},t.prototype.AT_LEAST_ONE_SEP8=function(t){this.atLeastOneSepFirstInternal(8,t)},t.prototype.AT_LEAST_ONE_SEP9=function(t){this.atLeastOneSepFirstInternal(9,t)},t.prototype.RULE=function(t,e,n){if(void 0===n&&(n=o.DEFAULT_RULE_CONFIG),r.contains(this.definedRulesNames,t)){var i={message:a.defaultGrammarValidatorErrorProvider.buildDuplicateRuleNameError({topLevelRule:t,grammarName:this.className}),type:o.ParserDefinitionErrorType.DUPLICATE_RULE_NAME,ruleName:t};this.definitionErrors.push(i)}if(this.definedRulesNames.push(t),!this.gastProductionsCache.containsKey(t)&&!this.serializedGrammar){var u=s.buildTopProduction(e.toString(),t,this.tokensMap);this.gastProductionsCache.put(t,u)}var c=this.defineRule(t,e,n);return this[t]=c,c},t.prototype.OVERRIDE_RULE=function(t,e,n){void 0===n&&(n=o.DEFAULT_RULE_CONFIG);var r=[];if(r=r.concat(u.validateRuleIsOverridden(t,this.definedRulesNames,this.className)),this.definitionErrors.push.apply(this.definitionErrors,r),!this.serializedGrammar){var i=s.buildTopProduction(e.toString(),t,this.tokensMap);this.gastProductionsCache.put(t,i)}var a=this.defineRule(t,e,n);return this[t]=a,a},t.prototype.BACKTRACK=function(t,e){return function(){this.isBackTrackingStack.push(1);var n=this.saveRecogState();try{return t.apply(this,e),!0}catch(t){if(i.isRecognitionException(t))return!1;throw t}finally{this.reloadRecogState(n),this.isBackTrackingStack.pop()}}},t.prototype.getGAstProductions=function(){return this.gastProductionsCache},t.prototype.getSerializedGastProductions=function(){return c.serializeGrammar(this.gastProductionsCache.values())},t}();e.RecognizerApi=p},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var r=n(0),i=n(9),o=n(6),a=n(12),s=n(13),u=n(3),c=n(25),p=n(2),l=n(7),h=n(4),f=function(){function t(){}return t.prototype.initRecognizerEngine=function(t,e){if(this.className=h.classNameFromInstance(this),this.shortRuleNameToFull=new h.HashTable,this.fullRuleNameToShort=new h.HashTable,this.ruleShortNameIdx=256,this.tokenMatcher=l.tokenStructuredMatcherNoCategories,this.definedRulesNames=[],this.tokensMap={},this.allRuleNames=[],this.isBackTrackingStack=[],this.RULE_STACK=[],this.RULE_OCCURRENCE_STACK=[],this.gastProductionsCache=new h.HashTable,this.serializedGrammar=r.has(e,"serializedGrammar")?e.serializedGrammar:u.DEFAULT_PARSER_CONFIG.serializedGrammar,r.isArray(t)){if(r.isEmpty(t))throw Error("A Token Vocabulary cannot be empty.\n\tNote that the first argument for the parser constructor\n\tis no longer a Token vector (since v4.0).");if("number"==typeof t[0].startOffset)throw Error("The Parser constructor no longer accepts a token vector as the first argument.\n\tSee: https://sap.github.io/chevrotain/docs/changes/BREAKING_CHANGES.html#_4-0-0\n\tFor Further details.")}if(r.isArray(t))this.tokensMap=r.reduce(t,function(t,e){return t[p.tokenName(e)]=e,t},{});else if(r.has(t,"modes")&&r.every(r.flatten(r.values(t.modes)),l.isTokenType)){var n=r.flatten(r.values(t.modes)),i=r.uniq(n);this.tokensMap=r.reduce(i,function(t,e){return t[p.tokenName(e)]=e,t},{})}else{if(!r.isObject(t))throw new Error("<tokensDictionary> argument must be An Array of Token constructors, A dictionary of Token constructors or an IMultiModeLexerDefinition");this.tokensMap=r.cloneObj(t)}this.tokensMap.EOF=p.EOF;var o=r.every(r.values(t),function(t){return r.isEmpty(t.categoryMatches)});this.tokenMatcher=o?l.tokenStructuredMatcherNoCategories:l.tokenStructuredMatcher,l.augmentTokenTypes(r.values(this.tokensMap))},t.prototype.defineRule=function(t,e,n){if(this.selfAnalysisDone)throw Error("Grammar rule <"+t+"> may not be defined after the 'performSelfAnalysis' method has been called'\nMake sure that all grammar rule definitions are done before 'performSelfAnalysis' is called.");var a,s=r.has(n,"resyncEnabled")?n.resyncEnabled:u.DEFAULT_RULE_CONFIG.resyncEnabled,c=r.has(n,"recoveryValueFunc")?n.recoveryValueFunc:u.DEFAULT_RULE_CONFIG.recoveryValueFunc,p=this.ruleShortNameIdx<<i.BITS_FOR_METHOD_IDX+i.BITS_FOR_OCCURRENCE_IDX;this.ruleShortNameIdx++,this.shortRuleNameToFull.put(p,t),this.fullRuleNameToShort.put(t,p);return(a=function(n,r){return void 0===n&&(n=0),this.ruleInvocationStateUpdate(p,t,n),function(t){try{return!0===this.outputCst?(e.apply(this,t),this.CST_STACK[this.CST_STACK.length-1]):e.apply(this,t)}catch(t){var n=1===this.RULE_STACK.length,r=s&&!this.isBackTracking()&&this.recoveryEnabled;if(o.isRecognitionException(t)){if(r){var i,a=this.findReSyncTokenType();if(this.isInCurrentRuleReSyncSet(a))return t.resyncedTokens=this.reSyncTo(a),this.outputCst?((i=this.CST_STACK[this.CST_STACK.length-1]).recoveredNode=!0,i):c();throw this.outputCst&&((i=this.CST_STACK[this.CST_STACK.length-1]).recoveredNode=!0,t.partialCstResult=i),t}if(n)return this.moveToTerminatedState(),c();throw t}throw t}finally{this.ruleFinallyStateUpdate()}}.call(this,r)}).ruleName=t,a},t.prototype.optionInternal=function(t,e){var n=this.getKeyForAutomaticLookahead(i.OPTION_IDX,e),r=this.nestedRuleBeforeClause(t,n);try{return this.optionInternalLogic(t,e,n)}finally{void 0!==r&&this.nestedRuleFinallyClause(n,r)}},t.prototype.optionInternalNoCst=function(t,e){var n=this.getKeyForAutomaticLookahead(i.OPTION_IDX,e);return this.optionInternalLogic(t,e,n)},t.prototype.optionInternalLogic=function(t,e,n){var r,i,o=this,a=this.getLookaheadFuncForOption(n,e);if(void 0!==t.DEF){if(r=t.DEF,void 0!==(i=t.GATE)){var s=a;a=function(){return i.call(o)&&s.call(o)}}}else r=t;if(!0===a.call(this))return r.call(this)},t.prototype.atLeastOneInternal=function(t,e){var n=this.getKeyForAutomaticLookahead(i.AT_LEAST_ONE_IDX,t),r=this.nestedRuleBeforeClause(e,n);try{return this.atLeastOneInternalLogic(t,e,n)}finally{void 0!==r&&this.nestedRuleFinallyClause(n,r)}},t.prototype.atLeastOneInternalNoCst=function(t,e){var n=this.getKeyForAutomaticLookahead(i.AT_LEAST_ONE_IDX,t);this.atLeastOneInternalLogic(t,e,n)},t.prototype.atLeastOneInternalLogic=function(t,e,n){var r,o,u=this,c=this.getLookaheadFuncForAtLeastOne(n,t);if(void 0!==e.DEF){if(r=e.DEF,void 0!==(o=e.GATE)){var p=c;c=function(){return o.call(u)&&p.call(u)}}}else r=e;if(!0!==c.call(this))throw this.raiseEarlyExitException(t,a.PROD_TYPE.REPETITION_MANDATORY,e.ERR_MSG);for(var l=this.doSingleRepetition(r);!0===c.call(this)&&!0===l;)l=this.doSingleRepetition(r);this.attemptInRepetitionRecovery(this.atLeastOneInternal,[t,e],c,i.AT_LEAST_ONE_IDX,t,s.NextTerminalAfterAtLeastOneWalker)},t.prototype.atLeastOneSepFirstInternal=function(t,e){var n=this.getKeyForAutomaticLookahead(i.AT_LEAST_ONE_SEP_IDX,t),r=this.nestedRuleBeforeClause(e,n);try{this.atLeastOneSepFirstInternalLogic(t,e,n)}finally{void 0!==r&&this.nestedRuleFinallyClause(n,r)}},t.prototype.atLeastOneSepFirstInternalNoCst=function(t,e){var n=this.getKeyForAutomaticLookahead(i.AT_LEAST_ONE_SEP_IDX,t);this.atLeastOneSepFirstInternalLogic(t,e,n)},t.prototype.atLeastOneSepFirstInternalLogic=function(t,e,n){var r=this,o=e.DEF,u=e.SEP;if(!0!==this.getLookaheadFuncForAtLeastOneSep(n,t).call(this))throw this.raiseEarlyExitException(t,a.PROD_TYPE.REPETITION_MANDATORY_WITH_SEPARATOR,e.ERR_MSG);o.call(this);for(var c=function(){return r.tokenMatcher(r.LA(1),u)};!0===this.tokenMatcher(this.LA(1),u);)this.CONSUME(u),o.call(this);this.attemptInRepetitionRecovery(this.repetitionSepSecondInternal,[t,u,c,o,s.NextTerminalAfterAtLeastOneSepWalker],c,i.AT_LEAST_ONE_SEP_IDX,t,s.NextTerminalAfterAtLeastOneSepWalker)},t.prototype.manyInternal=function(t,e){var n=this.getKeyForAutomaticLookahead(i.MANY_IDX,t),r=this.nestedRuleBeforeClause(e,n);try{return this.manyInternalLogic(t,e,n)}finally{void 0!==r&&this.nestedRuleFinallyClause(n,r)}},t.prototype.manyInternalNoCst=function(t,e){var n=this.getKeyForAutomaticLookahead(i.MANY_IDX,t);return this.manyInternalLogic(t,e,n)},t.prototype.manyInternalLogic=function(t,e,n){var r,o,a=this,u=this.getLookaheadFuncForMany(n,t);if(void 0!==e.DEF){if(r=e.DEF,void 0!==(o=e.GATE)){var c=u;u=function(){return o.call(a)&&c.call(a)}}}else r=e;for(var p=!0;!0===u.call(this)&&!0===p;)p=this.doSingleRepetition(r);this.attemptInRepetitionRecovery(this.manyInternal,[t,e],u,i.MANY_IDX,t,s.NextTerminalAfterManyWalker)},t.prototype.manySepFirstInternal=function(t,e){var n=this.getKeyForAutomaticLookahead(i.MANY_SEP_IDX,t),r=this.nestedRuleBeforeClause(e,n);try{this.manySepFirstInternalLogic(t,e,n)}finally{void 0!==r&&this.nestedRuleFinallyClause(n,r)}},t.prototype.manySepFirstInternalNoCst=function(t,e){var n=this.getKeyForAutomaticLookahead(i.MANY_SEP_IDX,t);this.manySepFirstInternalLogic(t,e,n)},t.prototype.manySepFirstInternalLogic=function(t,e,n){var r=this,o=e.DEF,a=e.SEP;if(!0===this.getLookaheadFuncForManySep(n,t).call(this)){o.call(this);for(var u=function(){return r.tokenMatcher(r.LA(1),a)};!0===this.tokenMatcher(this.LA(1),a);)this.CONSUME(a),o.call(this);this.attemptInRepetitionRecovery(this.repetitionSepSecondInternal,[t,a,u,o,s.NextTerminalAfterManySepWalker],u,i.MANY_SEP_IDX,t,s.NextTerminalAfterManySepWalker)}},t.prototype.repetitionSepSecondInternal=function(t,e,n,r,o){for(;n();)this.CONSUME(e),r.call(this);this.attemptInRepetitionRecovery(this.repetitionSepSecondInternal,[t,e,n,r,o],n,i.AT_LEAST_ONE_SEP_IDX,t,o)},t.prototype.doSingleRepetition=function(t){var e=this.getLexerPosition();return t.call(this),this.getLexerPosition()>e},t.prototype.orInternalNoCst=function(t,e){var n=r.isArray(t)?t:t.DEF,i=this.getLookaheadFuncForOr(e,n).call(this,n);if(void 0!==i)return n[i].ALT.call(this);this.raiseNoAltException(e,t.ERR_MSG)},t.prototype.orInternal=function(t,e){var n=this.getKeyForAutomaticLookahead(i.OR_IDX,e),o=this.nestedRuleBeforeClause(t,n);try{var a=r.isArray(t)?t:t.DEF,s=this.getLookaheadFuncForOr(e,a).call(this,a);if(void 0!==s){var u=a[s],c=this.nestedAltBeforeClause(u,e,i.OR_IDX,s);try{return u.ALT.call(this)}finally{void 0!==c&&this.nestedRuleFinallyClause(c.shortName,c.nestedName)}}this.raiseNoAltException(e,t.ERR_MSG)}finally{void 0!==o&&this.nestedRuleFinallyClause(n,o)}},t.prototype.ruleFinallyStateUpdate=function(){if(this.RULE_STACK.pop(),this.RULE_OCCURRENCE_STACK.pop(),this.cstFinallyStateUpdate(),0===this.RULE_STACK.length&&!this.isAtEndOfInput()){var t=this.LA(1),e=this.errorMessageProvider.buildNotAllInputParsedMessage({firstRedundant:t,ruleName:this.getCurrRuleFullName()});this.SAVE_ERROR(new o.NotAllInputParsedException(e,t))}},t.prototype.subruleInternal=function(t,e,n){var r;try{var i=void 0!==n?n.ARGS:void 0;return r=t.call(this,e,i),this.cstPostNonTerminal(r,void 0!==n&&void 0!==n.LABEL?n.LABEL:t.ruleName),r}catch(e){throw o.isRecognitionException(e)&&void 0!==e.partialCstResult&&(this.cstPostNonTerminal(e.partialCstResult,void 0!==n&&void 0!==n.LABEL?n.LABEL:t.ruleName),delete e.partialCstResult),e}},t.prototype.consumeInternal=function(t,e,n){var r;try{var i=this.LA(1);if(!0!==this.tokenMatcher(i,t)){var a=void 0,s=this.LA(0);throw a=void 0!==n&&n.ERR_MSG?n.ERR_MSG:this.errorMessageProvider.buildMismatchTokenMessage({expected:t,actual:i,previous:s,ruleName:this.getCurrRuleFullName()}),this.SAVE_ERROR(new o.MismatchedTokenException(a,i,s))}this.consumeToken(),r=i}catch(n){if(!this.recoveryEnabled||"MismatchedTokenException"!==n.name||this.isBackTracking())throw n;var u=this.getFollowsForInRuleRecovery(t,e);try{r=this.tryInRuleRecovery(t,u)}catch(t){throw t.name===c.IN_RULE_RECOVERY_EXCEPTION?n:t}}return this.cstPostTerminal(void 0!==n&&void 0!==n.LABEL?n.LABEL:t.tokenName,r),r},t.prototype.saveRecogState=function(){var t=this.errors,e=r.cloneArr(this.RULE_STACK);return{errors:t,lexerState:this.exportLexerState(),RULE_STACK:e,CST_STACK:this.CST_STACK,LAST_EXPLICIT_RULE_STACK:this.LAST_EXPLICIT_RULE_STACK}},t.prototype.reloadRecogState=function(t){this.errors=t.errors,this.importLexerState(t.lexerState),this.RULE_STACK=t.RULE_STACK},t.prototype.ruleInvocationStateUpdate=function(t,e,n){this.RULE_OCCURRENCE_STACK.push(n),this.RULE_STACK.push(t),this.cstInvocationStateUpdate(e,t)},t.prototype.isBackTracking=function(){return!r.isEmpty(this.isBackTrackingStack)},t.prototype.getCurrRuleFullName=function(){var t=this.getLastExplicitRuleShortName();return this.shortRuleNameToFull.get(t)},t.prototype.shortRuleNameToFullName=function(t){return this.shortRuleNameToFull.get(t)},t.prototype.isAtEndOfInput=function(){return this.tokenMatcher(this.LA(1),p.EOF)},t.prototype.reset=function(){this.resetLexerState(),this.isBackTrackingStack=[],this.errors=[],this.RULE_STACK=[],this.LAST_EXPLICIT_RULE_STACK=[],this.CST_STACK=[],this.RULE_OCCURRENCE_STACK=[]},t}();e.RecognizerEngine=f},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var r=n(6),i=n(0),o=n(12),a=n(3),s=function(){function t(){}return t.prototype.initErrorHandler=function(t){this._errors=[],this.errorMessageProvider=i.defaults(t.errorMessageProvider,a.DEFAULT_PARSER_CONFIG.errorMessageProvider)},t.prototype.SAVE_ERROR=function(t){if(r.isRecognitionException(t))return t.context={ruleStack:this.getHumanReadableRuleStack(),ruleOccurrenceStack:i.cloneArr(this.RULE_OCCURRENCE_STACK)},this._errors.push(t),t;throw Error("Trying to save an Error which is not a RecognitionException")},Object.defineProperty(t.prototype,"errors",{get:function(){return i.cloneArr(this._errors)},set:function(t){this._errors=t},enumerable:!0,configurable:!0}),t.prototype.raiseEarlyExitException=function(t,e,n){for(var i=this.getCurrRuleFullName(),a=this.getGAstProductions().get(i),s=o.getLookaheadPathsForOptionalProd(t,a,e,this.maxLookahead)[0],u=[],c=1;c<this.maxLookahead;c++)u.push(this.LA(c));var p=this.errorMessageProvider.buildEarlyExitMessage({expectedIterationPaths:s,actual:u,previous:this.LA(0),customUserDescription:n,ruleName:i});throw this.SAVE_ERROR(new r.EarlyExitException(p,this.LA(1),this.LA(0)))},t.prototype.raiseNoAltException=function(t,e){for(var n=this.getCurrRuleFullName(),i=this.getGAstProductions().get(n),a=o.getLookaheadPathsForOr(t,i,this.maxLookahead),s=[],u=1;u<=this.maxLookahead;u++)s.push(this.LA(u));var c=this.LA(0),p=this.errorMessageProvider.buildNoViableAltMessage({expectedPathsPerAlt:a,actual:s,previous:c,customUserDescription:e,ruleName:this.getCurrRuleFullName()});throw this.SAVE_ERROR(new r.NoViableAltException(p,this.LA(1),c))},t}();e.ErrorHandler=s},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var r=n(13),i=n(0),o=function(){function t(){}return t.prototype.initContentAssist=function(){},t.prototype.computeContentAssist=function(t,e){var n=this.gastProductionsCache.get(t);if(i.isUndefined(n))throw Error("Rule ->"+t+"<- does not exist in this grammar.");return r.nextPossibleTokensAfter([n],e,this.tokenMatcher,this.maxLookahead)},t.prototype.getNextPossibleTokenTypes=function(t){var e=i.first(t.ruleStack),n=this.getGAstProductions().get(e);return new r.NextAfterTokenWalker(n,t).startWalking()},t}();e.ContentAssist=o},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var r=n(17);e.createSyntaxDiagramsCode=function(t,e){var n=void 0===e?{}:e,i=n.resourceBase,o=void 0===i?"https://unpkg.com/chevrotain@"+r.VERSION+"/diagrams/":i,a=n.css;return"\n\x3c!-- This is a generated file --\x3e\n<!DOCTYPE html>\n<meta charset=\"utf-8\">\n<style>\n  body {\n    background-color: hsl(30, 20%, 95%)\n  }\n</style>\n\n\n<link rel='stylesheet' href='"+(void 0===a?"https://unpkg.com/chevrotain@"+r.VERSION+"/diagrams/diagrams.css":a)+"'>\n\n<script src='"+o+"vendor/railroad-diagrams.js'><\/script>\n<script src='"+o+"src/diagrams_builder.js'><\/script>\n<script src='"+o+"src/diagrams_behavior.js'><\/script>\n<script src='"+o+'src/main.js\'><\/script>\n\n<div id="diagrams" align="center"></div>    \n\n<script>\n    window.serializedGrammar = '+JSON.stringify(t,null,"  ")+';\n<\/script>\n\n<script>\n    var diagramsDiv = document.getElementById("diagrams");\n    main.drawDiagramsFromSerializedGrammar(serializedGrammar, diagramsDiv);\n<\/script>\n'}},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var r=n(41);e.generateParserFactory=function(t){var e=r.genWrapperFunction({name:t.name,rules:t.rules}),i=new Function("tokenVocabulary","config","chevrotain",e);return function(e){return i(t.tokenVocabulary,e,n(18))}},e.generateParserModule=function(t){return r.genUmdModule({name:t.name,rules:t.rules})}},function(t,e,n){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var r=n(0),i=n(2),o=n(1),a="\n";function s(t){return"\nfunction "+t.name+"(tokenVocabulary, config) {\n    // invoke super constructor\n    chevrotain.Parser.call(this, tokenVocabulary, config)\n\n    const $ = this\n\n    "+u(t.rules)+"\n\n    // very important to call this after all the rules have been defined.\n    // otherwise the parser may not work correctly as it will lack information\n    // derived during the self analysis phase.\n    this.performSelfAnalysis(this)\n}\n\n// inheritance as implemented in javascript in the previous decade... :(\n"+t.name+".prototype = Object.create(chevrotain.Parser.prototype)\n"+t.name+".prototype.constructor = "+t.name+"    \n    "}function u(t){return r.map(t,function(t){return c(t,1)}).join("\n")}function c(t,e){var n=T(e,'$.RULE("'+t.name+'", function() {')+a;return n+=E(t.definition,e+1),n+=T(e+1,"})")+a}function p(t,e){var n=i.tokenName(t.terminalType);return T(e,"$.CONSUME"+t.idx+"(this.tokensMap."+n+")"+a)}function l(t,e){return T(e,"$.SUBRULE"+t.idx+"($."+t.nonTerminalName+")"+a)}function h(t,e){var n=T(e,"$.OR"+t.idx+"([")+a;return n+=r.map(t.definition,function(t){return f(t,e+1)}).join(","+a),n+=a+T(e,"])"+a)}function f(t,e){var n=T(e,"{")+a;return t.name&&(n+=T(e+1,'NAME: "'+t.name+'",')+a),n+=T(e+1,"ALT: function() {")+a,n+=E(t.definition,e+1),n+=T(e+1,"}")+a,n+=T(e,"}")}function d(t,e,n){var r=T(n,"$."+(t+e.idx)+"(");return e.name||e.separator?(r+="{"+a,e.name&&(r+=T(n+1,'NAME: "'+e.name+'"')+","+a),e.separator&&(r+=T(n+1,"SEP: this.tokensMap."+i.tokenName(e.separator))+","+a),r+="DEF: "+m(e.definition,n+2)+a,r+=T(n,"}")+a):r+=m(e.definition,n+1),r+=T(n,")")+a}function m(t,e){var n="function() {"+a;return n+=E(t,e),n+=T(e,"}")+a}function E(t,e){var n="";return r.forEach(t,function(t){n+=function(t,e){if(t instanceof o.NonTerminal)return l(t,e);if(t instanceof o.Option)return d("OPTION",t,e);if(t instanceof o.RepetitionMandatory)return d("AT_LEAST_ONE",t,e);if(t instanceof o.RepetitionMandatoryWithSeparator)return d("AT_LEAST_ONE_SEP",t,e);if(t instanceof o.RepetitionWithSeparator)return d("MANY_SEP",t,e);if(t instanceof o.Repetition)return d("MANY",t,e);if(t instanceof o.Alternation)return h(t,e);if(t instanceof o.Terminal)return p(t,e);if(t instanceof o.Flat)return E(t.definition,e);throw Error("non exhaustive match")}(t,e+1)}),n}function T(t,e){return Array(4*t+1).join(" ")+e}e.genUmdModule=function(t){return"\n(function (root, factory) {\n    if (typeof define === 'function' && define.amd) {\n        // AMD. Register as an anonymous module.\n        define(['chevrotain'], factory);\n    } else if (typeof module === 'object' && module.exports) {\n        // Node. Does not work with strict CommonJS, but\n        // only CommonJS-like environments that support module.exports,\n        // like Node.\n        module.exports = factory(require('chevrotain'));\n    } else {\n        // Browser globals (root is window)\n        root.returnExports = factory(root.b);\n    }\n}(typeof self !== 'undefined' ? self : this, function (chevrotain) {\n\n"+s(t)+"\n    \nreturn {\n    "+t.name+": "+t.name+" \n}\n}));\n"},e.genWrapperFunction=function(t){return"    \n"+s(t)+"\nreturn new "+t.name+"(tokenVocabulary, config)    \n"},e.genClass=s,e.genAllRules=u,e.genRule=c,e.genTerminal=p,e.genNonTerminal=l,e.genAlternation=h,e.genSingleAlt=f}])});
\ No newline at end of file
diff --git a/javascripts/lib/codemirror.js b/javascripts/lib/codemirror.js
new file mode 100644
index 000000000..9ab04c682
--- /dev/null
+++ b/javascripts/lib/codemirror.js
@@ -0,0 +1,9755 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+// This is CodeMirror (https://codemirror.net), a code editor
+// implemented in JavaScript on top of the browser's DOM.
+//
+// You can find some technical background for some of the code below
+// at http://marijnhaverbeke.nl/blog/#cm-internals .
+
+(function (global, factory) {
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define(factory) :
+  (global.CodeMirror = factory());
+}(this, (function () { 'use strict';
+
+  // Kludges for bugs and behavior differences that can't be feature
+  // detected are enabled based on userAgent etc sniffing.
+  var userAgent = navigator.userAgent;
+  var platform = navigator.platform;
+
+  var gecko = /gecko\/\d/i.test(userAgent);
+  var ie_upto10 = /MSIE \d/.test(userAgent);
+  var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent);
+  var edge = /Edge\/(\d+)/.exec(userAgent);
+  var ie = ie_upto10 || ie_11up || edge;
+  var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : +(edge || ie_11up)[1]);
+  var webkit = !edge && /WebKit\//.test(userAgent);
+  var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent);
+  var chrome = !edge && /Chrome\//.test(userAgent);
+  var presto = /Opera\//.test(userAgent);
+  var safari = /Apple Computer/.test(navigator.vendor);
+  var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent);
+  var phantom = /PhantomJS/.test(userAgent);
+
+  var ios = !edge && /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent);
+  var android = /Android/.test(userAgent);
+  // This is woefully incomplete. Suggestions for alternative methods welcome.
+  var mobile = ios || android || /webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent);
+  var mac = ios || /Mac/.test(platform);
+  var chromeOS = /\bCrOS\b/.test(userAgent);
+  var windows = /win/i.test(platform);
+
+  var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/);
+  if (presto_version) { presto_version = Number(presto_version[1]); }
+  if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
+  // Some browsers use the wrong event properties to signal cmd/ctrl on OS X
+  var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11));
+  var captureRightClick = gecko || (ie && ie_version >= 9);
+
+  function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*") }
+
+  var rmClass = function(node, cls) {
+    var current = node.className;
+    var match = classTest(cls).exec(current);
+    if (match) {
+      var after = current.slice(match.index + match[0].length);
+      node.className = current.slice(0, match.index) + (after ? match[1] + after : "");
+    }
+  };
+
+  function removeChildren(e) {
+    for (var count = e.childNodes.length; count > 0; --count)
+      { e.removeChild(e.firstChild); }
+    return e
+  }
+
+  function removeChildrenAndAdd(parent, e) {
+    return removeChildren(parent).appendChild(e)
+  }
+
+  function elt(tag, content, className, style) {
+    var e = document.createElement(tag);
+    if (className) { e.className = className; }
+    if (style) { e.style.cssText = style; }
+    if (typeof content == "string") { e.appendChild(document.createTextNode(content)); }
+    else if (content) { for (var i = 0; i < content.length; ++i) { e.appendChild(content[i]); } }
+    return e
+  }
+  // wrapper for elt, which removes the elt from the accessibility tree
+  function eltP(tag, content, className, style) {
+    var e = elt(tag, content, className, style);
+    e.setAttribute("role", "presentation");
+    return e
+  }
+
+  var range;
+  if (document.createRange) { range = function(node, start, end, endNode) {
+    var r = document.createRange();
+    r.setEnd(endNode || node, end);
+    r.setStart(node, start);
+    return r
+  }; }
+  else { range = function(node, start, end) {
+    var r = document.body.createTextRange();
+    try { r.moveToElementText(node.parentNode); }
+    catch(e) { return r }
+    r.collapse(true);
+    r.moveEnd("character", end);
+    r.moveStart("character", start);
+    return r
+  }; }
+
+  function contains(parent, child) {
+    if (child.nodeType == 3) // Android browser always returns false when child is a textnode
+      { child = child.parentNode; }
+    if (parent.contains)
+      { return parent.contains(child) }
+    do {
+      if (child.nodeType == 11) { child = child.host; }
+      if (child == parent) { return true }
+    } while (child = child.parentNode)
+  }
+
+  function activeElt() {
+    // IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
+    // IE < 10 will throw when accessed while the page is loading or in an iframe.
+    // IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
+    var activeElement;
+    try {
+      activeElement = document.activeElement;
+    } catch(e) {
+      activeElement = document.body || null;
+    }
+    while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement)
+      { activeElement = activeElement.shadowRoot.activeElement; }
+    return activeElement
+  }
+
+  function addClass(node, cls) {
+    var current = node.className;
+    if (!classTest(cls).test(current)) { node.className += (current ? " " : "") + cls; }
+  }
+  function joinClasses(a, b) {
+    var as = a.split(" ");
+    for (var i = 0; i < as.length; i++)
+      { if (as[i] && !classTest(as[i]).test(b)) { b += " " + as[i]; } }
+    return b
+  }
+
+  var selectInput = function(node) { node.select(); };
+  if (ios) // Mobile Safari apparently has a bug where select() is broken.
+    { selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; }; }
+  else if (ie) // Suppress mysterious IE10 errors
+    { selectInput = function(node) { try { node.select(); } catch(_e) {} }; }
+
+  function bind(f) {
+    var args = Array.prototype.slice.call(arguments, 1);
+    return function(){return f.apply(null, args)}
+  }
+
+  function copyObj(obj, target, overwrite) {
+    if (!target) { target = {}; }
+    for (var prop in obj)
+      { if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
+        { target[prop] = obj[prop]; } }
+    return target
+  }
+
+  // Counts the column offset in a string, taking tabs into account.
+  // Used mostly to find indentation.
+  function countColumn(string, end, tabSize, startIndex, startValue) {
+    if (end == null) {
+      end = string.search(/[^\s\u00a0]/);
+      if (end == -1) { end = string.length; }
+    }
+    for (var i = startIndex || 0, n = startValue || 0;;) {
+      var nextTab = string.indexOf("\t", i);
+      if (nextTab < 0 || nextTab >= end)
+        { return n + (end - i) }
+      n += nextTab - i;
+      n += tabSize - (n % tabSize);
+      i = nextTab + 1;
+    }
+  }
+
+  var Delayed = function() {this.id = null;};
+  Delayed.prototype.set = function (ms, f) {
+    clearTimeout(this.id);
+    this.id = setTimeout(f, ms);
+  };
+
+  function indexOf(array, elt) {
+    for (var i = 0; i < array.length; ++i)
+      { if (array[i] == elt) { return i } }
+    return -1
+  }
+
+  // Number of pixels added to scroller and sizer to hide scrollbar
+  var scrollerGap = 30;
+
+  // Returned or thrown by various protocols to signal 'I'm not
+  // handling this'.
+  var Pass = {toString: function(){return "CodeMirror.Pass"}};
+
+  // Reused option objects for setSelection & friends
+  var sel_dontScroll = {scroll: false}, sel_mouse = {origin: "*mouse"}, sel_move = {origin: "+move"};
+
+  // The inverse of countColumn -- find the offset that corresponds to
+  // a particular column.
+  function findColumn(string, goal, tabSize) {
+    for (var pos = 0, col = 0;;) {
+      var nextTab = string.indexOf("\t", pos);
+      if (nextTab == -1) { nextTab = string.length; }
+      var skipped = nextTab - pos;
+      if (nextTab == string.length || col + skipped >= goal)
+        { return pos + Math.min(skipped, goal - col) }
+      col += nextTab - pos;
+      col += tabSize - (col % tabSize);
+      pos = nextTab + 1;
+      if (col >= goal) { return pos }
+    }
+  }
+
+  var spaceStrs = [""];
+  function spaceStr(n) {
+    while (spaceStrs.length <= n)
+      { spaceStrs.push(lst(spaceStrs) + " "); }
+    return spaceStrs[n]
+  }
+
+  function lst(arr) { return arr[arr.length-1] }
+
+  function map(array, f) {
+    var out = [];
+    for (var i = 0; i < array.length; i++) { out[i] = f(array[i], i); }
+    return out
+  }
+
+  function insertSorted(array, value, score) {
+    var pos = 0, priority = score(value);
+    while (pos < array.length && score(array[pos]) <= priority) { pos++; }
+    array.splice(pos, 0, value);
+  }
+
+  function nothing() {}
+
+  function createObj(base, props) {
+    var inst;
+    if (Object.create) {
+      inst = Object.create(base);
+    } else {
+      nothing.prototype = base;
+      inst = new nothing();
+    }
+    if (props) { copyObj(props, inst); }
+    return inst
+  }
+
+  var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
+  function isWordCharBasic(ch) {
+    return /\w/.test(ch) || ch > "\x80" &&
+      (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch))
+  }
+  function isWordChar(ch, helper) {
+    if (!helper) { return isWordCharBasic(ch) }
+    if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) { return true }
+    return helper.test(ch)
+  }
+
+  function isEmpty(obj) {
+    for (var n in obj) { if (obj.hasOwnProperty(n) && obj[n]) { return false } }
+    return true
+  }
+
+  // Extending unicode characters. A series of a non-extending char +
+  // any number of extending chars is treated as a single unit as far
+  // as editing and measuring is concerned. This is not fully correct,
+  // since some scripts/fonts/browsers also treat other configurations
+  // of code points as a group.
+  var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/;
+  function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch) }
+
+  // Returns a number from the range [`0`; `str.length`] unless `pos` is outside that range.
+  function skipExtendingChars(str, pos, dir) {
+    while ((dir < 0 ? pos > 0 : pos < str.length) && isExtendingChar(str.charAt(pos))) { pos += dir; }
+    return pos
+  }
+
+  // Returns the value from the range [`from`; `to`] that satisfies
+  // `pred` and is closest to `from`. Assumes that at least `to`
+  // satisfies `pred`. Supports `from` being greater than `to`.
+  function findFirst(pred, from, to) {
+    // At any point we are certain `to` satisfies `pred`, don't know
+    // whether `from` does.
+    var dir = from > to ? -1 : 1;
+    for (;;) {
+      if (from == to) { return from }
+      var midF = (from + to) / 2, mid = dir < 0 ? Math.ceil(midF) : Math.floor(midF);
+      if (mid == from) { return pred(mid) ? from : to }
+      if (pred(mid)) { to = mid; }
+      else { from = mid + dir; }
+    }
+  }
+
+  // BIDI HELPERS
+
+  function iterateBidiSections(order, from, to, f) {
+    if (!order) { return f(from, to, "ltr", 0) }
+    var found = false;
+    for (var i = 0; i < order.length; ++i) {
+      var part = order[i];
+      if (part.from < to && part.to > from || from == to && part.to == from) {
+        f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr", i);
+        found = true;
+      }
+    }
+    if (!found) { f(from, to, "ltr"); }
+  }
+
+  var bidiOther = null;
+  function getBidiPartAt(order, ch, sticky) {
+    var found;
+    bidiOther = null;
+    for (var i = 0; i < order.length; ++i) {
+      var cur = order[i];
+      if (cur.from < ch && cur.to > ch) { return i }
+      if (cur.to == ch) {
+        if (cur.from != cur.to && sticky == "before") { found = i; }
+        else { bidiOther = i; }
+      }
+      if (cur.from == ch) {
+        if (cur.from != cur.to && sticky != "before") { found = i; }
+        else { bidiOther = i; }
+      }
+    }
+    return found != null ? found : bidiOther
+  }
+
+  // Bidirectional ordering algorithm
+  // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
+  // that this (partially) implements.
+
+  // One-char codes used for character types:
+  // L (L):   Left-to-Right
+  // R (R):   Right-to-Left
+  // r (AL):  Right-to-Left Arabic
+  // 1 (EN):  European Number
+  // + (ES):  European Number Separator
+  // % (ET):  European Number Terminator
+  // n (AN):  Arabic Number
+  // , (CS):  Common Number Separator
+  // m (NSM): Non-Spacing Mark
+  // b (BN):  Boundary Neutral
+  // s (B):   Paragraph Separator
+  // t (S):   Segment Separator
+  // w (WS):  Whitespace
+  // N (ON):  Other Neutrals
+
+  // Returns null if characters are ordered as they appear
+  // (left-to-right), or an array of sections ({from, to, level}
+  // objects) in the order in which they occur visually.
+  var bidiOrdering = (function() {
+    // Character types for codepoints 0 to 0xff
+    var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN";
+    // Character types for codepoints 0x600 to 0x6f9
+    var arabicTypes = "nnnnnnNNr%%r,rNNmmmmmmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmmmnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmnNmmmmmmrrmmNmmmmrr1111111111";
+    function charType(code) {
+      if (code <= 0xf7) { return lowTypes.charAt(code) }
+      else if (0x590 <= code && code <= 0x5f4) { return "R" }
+      else if (0x600 <= code && code <= 0x6f9) { return arabicTypes.charAt(code - 0x600) }
+      else if (0x6ee <= code && code <= 0x8ac) { return "r" }
+      else if (0x2000 <= code && code <= 0x200b) { return "w" }
+      else if (code == 0x200c) { return "b" }
+      else { return "L" }
+    }
+
+    var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
+    var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
+
+    function BidiSpan(level, from, to) {
+      this.level = level;
+      this.from = from; this.to = to;
+    }
+
+    return function(str, direction) {
+      var outerType = direction == "ltr" ? "L" : "R";
+
+      if (str.length == 0 || direction == "ltr" && !bidiRE.test(str)) { return false }
+      var len = str.length, types = [];
+      for (var i = 0; i < len; ++i)
+        { types.push(charType(str.charCodeAt(i))); }
+
+      // W1. Examine each non-spacing mark (NSM) in the level run, and
+      // change the type of the NSM to the type of the previous
+      // character. If the NSM is at the start of the level run, it will
+      // get the type of sor.
+      for (var i$1 = 0, prev = outerType; i$1 < len; ++i$1) {
+        var type = types[i$1];
+        if (type == "m") { types[i$1] = prev; }
+        else { prev = type; }
+      }
+
+      // W2. Search backwards from each instance of a European number
+      // until the first strong type (R, L, AL, or sor) is found. If an
+      // AL is found, change the type of the European number to Arabic
+      // number.
+      // W3. Change all ALs to R.
+      for (var i$2 = 0, cur = outerType; i$2 < len; ++i$2) {
+        var type$1 = types[i$2];
+        if (type$1 == "1" && cur == "r") { types[i$2] = "n"; }
+        else if (isStrong.test(type$1)) { cur = type$1; if (type$1 == "r") { types[i$2] = "R"; } }
+      }
+
+      // W4. A single European separator between two European numbers
+      // changes to a European number. A single common separator between
+      // two numbers of the same type changes to that type.
+      for (var i$3 = 1, prev$1 = types[0]; i$3 < len - 1; ++i$3) {
+        var type$2 = types[i$3];
+        if (type$2 == "+" && prev$1 == "1" && types[i$3+1] == "1") { types[i$3] = "1"; }
+        else if (type$2 == "," && prev$1 == types[i$3+1] &&
+                 (prev$1 == "1" || prev$1 == "n")) { types[i$3] = prev$1; }
+        prev$1 = type$2;
+      }
+
+      // W5. A sequence of European terminators adjacent to European
+      // numbers changes to all European numbers.
+      // W6. Otherwise, separators and terminators change to Other
+      // Neutral.
+      for (var i$4 = 0; i$4 < len; ++i$4) {
+        var type$3 = types[i$4];
+        if (type$3 == ",") { types[i$4] = "N"; }
+        else if (type$3 == "%") {
+          var end = (void 0);
+          for (end = i$4 + 1; end < len && types[end] == "%"; ++end) {}
+          var replace = (i$4 && types[i$4-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
+          for (var j = i$4; j < end; ++j) { types[j] = replace; }
+          i$4 = end - 1;
+        }
+      }
+
+      // W7. Search backwards from each instance of a European number
+      // until the first strong type (R, L, or sor) is found. If an L is
+      // found, then change the type of the European number to L.
+      for (var i$5 = 0, cur$1 = outerType; i$5 < len; ++i$5) {
+        var type$4 = types[i$5];
+        if (cur$1 == "L" && type$4 == "1") { types[i$5] = "L"; }
+        else if (isStrong.test(type$4)) { cur$1 = type$4; }
+      }
+
+      // N1. A sequence of neutrals takes the direction of the
+      // surrounding strong text if the text on both sides has the same
+      // direction. European and Arabic numbers act as if they were R in
+      // terms of their influence on neutrals. Start-of-level-run (sor)
+      // and end-of-level-run (eor) are used at level run boundaries.
+      // N2. Any remaining neutrals take the embedding direction.
+      for (var i$6 = 0; i$6 < len; ++i$6) {
+        if (isNeutral.test(types[i$6])) {
+          var end$1 = (void 0);
+          for (end$1 = i$6 + 1; end$1 < len && isNeutral.test(types[end$1]); ++end$1) {}
+          var before = (i$6 ? types[i$6-1] : outerType) == "L";
+          var after = (end$1 < len ? types[end$1] : outerType) == "L";
+          var replace$1 = before == after ? (before ? "L" : "R") : outerType;
+          for (var j$1 = i$6; j$1 < end$1; ++j$1) { types[j$1] = replace$1; }
+          i$6 = end$1 - 1;
+        }
+      }
+
+      // Here we depart from the documented algorithm, in order to avoid
+      // building up an actual levels array. Since there are only three
+      // levels (0, 1, 2) in an implementation that doesn't take
+      // explicit embedding into account, we can build up the order on
+      // the fly, without following the level-based algorithm.
+      var order = [], m;
+      for (var i$7 = 0; i$7 < len;) {
+        if (countsAsLeft.test(types[i$7])) {
+          var start = i$7;
+          for (++i$7; i$7 < len && countsAsLeft.test(types[i$7]); ++i$7) {}
+          order.push(new BidiSpan(0, start, i$7));
+        } else {
+          var pos = i$7, at = order.length;
+          for (++i$7; i$7 < len && types[i$7] != "L"; ++i$7) {}
+          for (var j$2 = pos; j$2 < i$7;) {
+            if (countsAsNum.test(types[j$2])) {
+              if (pos < j$2) { order.splice(at, 0, new BidiSpan(1, pos, j$2)); }
+              var nstart = j$2;
+              for (++j$2; j$2 < i$7 && countsAsNum.test(types[j$2]); ++j$2) {}
+              order.splice(at, 0, new BidiSpan(2, nstart, j$2));
+              pos = j$2;
+            } else { ++j$2; }
+          }
+          if (pos < i$7) { order.splice(at, 0, new BidiSpan(1, pos, i$7)); }
+        }
+      }
+      if (direction == "ltr") {
+        if (order[0].level == 1 && (m = str.match(/^\s+/))) {
+          order[0].from = m[0].length;
+          order.unshift(new BidiSpan(0, 0, m[0].length));
+        }
+        if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
+          lst(order).to -= m[0].length;
+          order.push(new BidiSpan(0, len - m[0].length, len));
+        }
+      }
+
+      return direction == "rtl" ? order.reverse() : order
+    }
+  })();
+
+  // Get the bidi ordering for the given line (and cache it). Returns
+  // false for lines that are fully left-to-right, and an array of
+  // BidiSpan objects otherwise.
+  function getOrder(line, direction) {
+    var order = line.order;
+    if (order == null) { order = line.order = bidiOrdering(line.text, direction); }
+    return order
+  }
+
+  // EVENT HANDLING
+
+  // Lightweight event framework. on/off also work on DOM nodes,
+  // registering native DOM handlers.
+
+  var noHandlers = [];
+
+  var on = function(emitter, type, f) {
+    if (emitter.addEventListener) {
+      emitter.addEventListener(type, f, false);
+    } else if (emitter.attachEvent) {
+      emitter.attachEvent("on" + type, f);
+    } else {
+      var map$$1 = emitter._handlers || (emitter._handlers = {});
+      map$$1[type] = (map$$1[type] || noHandlers).concat(f);
+    }
+  };
+
+  function getHandlers(emitter, type) {
+    return emitter._handlers && emitter._handlers[type] || noHandlers
+  }
+
+  function off(emitter, type, f) {
+    if (emitter.removeEventListener) {
+      emitter.removeEventListener(type, f, false);
+    } else if (emitter.detachEvent) {
+      emitter.detachEvent("on" + type, f);
+    } else {
+      var map$$1 = emitter._handlers, arr = map$$1 && map$$1[type];
+      if (arr) {
+        var index = indexOf(arr, f);
+        if (index > -1)
+          { map$$1[type] = arr.slice(0, index).concat(arr.slice(index + 1)); }
+      }
+    }
+  }
+
+  function signal(emitter, type /*, values...*/) {
+    var handlers = getHandlers(emitter, type);
+    if (!handlers.length) { return }
+    var args = Array.prototype.slice.call(arguments, 2);
+    for (var i = 0; i < handlers.length; ++i) { handlers[i].apply(null, args); }
+  }
+
+  // The DOM events that CodeMirror handles can be overridden by
+  // registering a (non-DOM) handler on the editor for the event name,
+  // and preventDefault-ing the event in that handler.
+  function signalDOMEvent(cm, e, override) {
+    if (typeof e == "string")
+      { e = {type: e, preventDefault: function() { this.defaultPrevented = true; }}; }
+    signal(cm, override || e.type, cm, e);
+    return e_defaultPrevented(e) || e.codemirrorIgnore
+  }
+
+  function signalCursorActivity(cm) {
+    var arr = cm._handlers && cm._handlers.cursorActivity;
+    if (!arr) { return }
+    var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []);
+    for (var i = 0; i < arr.length; ++i) { if (indexOf(set, arr[i]) == -1)
+      { set.push(arr[i]); } }
+  }
+
+  function hasHandler(emitter, type) {
+    return getHandlers(emitter, type).length > 0
+  }
+
+  // Add on and off methods to a constructor's prototype, to make
+  // registering events on such objects more convenient.
+  function eventMixin(ctor) {
+    ctor.prototype.on = function(type, f) {on(this, type, f);};
+    ctor.prototype.off = function(type, f) {off(this, type, f);};
+  }
+
+  // Due to the fact that we still support jurassic IE versions, some
+  // compatibility wrappers are needed.
+
+  function e_preventDefault(e) {
+    if (e.preventDefault) { e.preventDefault(); }
+    else { e.returnValue = false; }
+  }
+  function e_stopPropagation(e) {
+    if (e.stopPropagation) { e.stopPropagation(); }
+    else { e.cancelBubble = true; }
+  }
+  function e_defaultPrevented(e) {
+    return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false
+  }
+  function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);}
+
+  function e_target(e) {return e.target || e.srcElement}
+  function e_button(e) {
+    var b = e.which;
+    if (b == null) {
+      if (e.button & 1) { b = 1; }
+      else if (e.button & 2) { b = 3; }
+      else if (e.button & 4) { b = 2; }
+    }
+    if (mac && e.ctrlKey && b == 1) { b = 3; }
+    return b
+  }
+
+  // Detect drag-and-drop
+  var dragAndDrop = function() {
+    // There is *some* kind of drag-and-drop support in IE6-8, but I
+    // couldn't get it to work yet.
+    if (ie && ie_version < 9) { return false }
+    var div = elt('div');
+    return "draggable" in div || "dragDrop" in div
+  }();
+
+  var zwspSupported;
+  function zeroWidthElement(measure) {
+    if (zwspSupported == null) {
+      var test = elt("span", "\u200b");
+      removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
+      if (measure.firstChild.offsetHeight != 0)
+        { zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8); }
+    }
+    var node = zwspSupported ? elt("span", "\u200b") :
+      elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
+    node.setAttribute("cm-text", "");
+    return node
+  }
+
+  // Feature-detect IE's crummy client rect reporting for bidi text
+  var badBidiRects;
+  function hasBadBidiRects(measure) {
+    if (badBidiRects != null) { return badBidiRects }
+    var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"));
+    var r0 = range(txt, 0, 1).getBoundingClientRect();
+    var r1 = range(txt, 1, 2).getBoundingClientRect();
+    removeChildren(measure);
+    if (!r0 || r0.left == r0.right) { return false } // Safari returns null in some cases (#2780)
+    return badBidiRects = (r1.right - r0.right < 3)
+  }
+
+  // See if "".split is the broken IE version, if so, provide an
+  // alternative way to split lines.
+  var splitLinesAuto = "\n\nb".split(/\n/).length != 3 ? function (string) {
+    var pos = 0, result = [], l = string.length;
+    while (pos <= l) {
+      var nl = string.indexOf("\n", pos);
+      if (nl == -1) { nl = string.length; }
+      var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
+      var rt = line.indexOf("\r");
+      if (rt != -1) {
+        result.push(line.slice(0, rt));
+        pos += rt + 1;
+      } else {
+        result.push(line);
+        pos = nl + 1;
+      }
+    }
+    return result
+  } : function (string) { return string.split(/\r\n?|\n/); };
+
+  var hasSelection = window.getSelection ? function (te) {
+    try { return te.selectionStart != te.selectionEnd }
+    catch(e) { return false }
+  } : function (te) {
+    var range$$1;
+    try {range$$1 = te.ownerDocument.selection.createRange();}
+    catch(e) {}
+    if (!range$$1 || range$$1.parentElement() != te) { return false }
+    return range$$1.compareEndPoints("StartToEnd", range$$1) != 0
+  };
+
+  var hasCopyEvent = (function () {
+    var e = elt("div");
+    if ("oncopy" in e) { return true }
+    e.setAttribute("oncopy", "return;");
+    return typeof e.oncopy == "function"
+  })();
+
+  var badZoomedRects = null;
+  function hasBadZoomedRects(measure) {
+    if (badZoomedRects != null) { return badZoomedRects }
+    var node = removeChildrenAndAdd(measure, elt("span", "x"));
+    var normal = node.getBoundingClientRect();
+    var fromRange = range(node, 0, 1).getBoundingClientRect();
+    return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1
+  }
+
+  // Known modes, by name and by MIME
+  var modes = {}, mimeModes = {};
+
+  // Extra arguments are stored as the mode's dependencies, which is
+  // used by (legacy) mechanisms like loadmode.js to automatically
+  // load a mode. (Preferred mechanism is the require/define calls.)
+  function defineMode(name, mode) {
+    if (arguments.length > 2)
+      { mode.dependencies = Array.prototype.slice.call(arguments, 2); }
+    modes[name] = mode;
+  }
+
+  function defineMIME(mime, spec) {
+    mimeModes[mime] = spec;
+  }
+
+  // Given a MIME type, a {name, ...options} config object, or a name
+  // string, return a mode config object.
+  function resolveMode(spec) {
+    if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
+      spec = mimeModes[spec];
+    } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
+      var found = mimeModes[spec.name];
+      if (typeof found == "string") { found = {name: found}; }
+      spec = createObj(found, spec);
+      spec.name = found.name;
+    } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
+      return resolveMode("application/xml")
+    } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
+      return resolveMode("application/json")
+    }
+    if (typeof spec == "string") { return {name: spec} }
+    else { return spec || {name: "null"} }
+  }
+
+  // Given a mode spec (anything that resolveMode accepts), find and
+  // initialize an actual mode object.
+  function getMode(options, spec) {
+    spec = resolveMode(spec);
+    var mfactory = modes[spec.name];
+    if (!mfactory) { return getMode(options, "text/plain") }
+    var modeObj = mfactory(options, spec);
+    if (modeExtensions.hasOwnProperty(spec.name)) {
+      var exts = modeExtensions[spec.name];
+      for (var prop in exts) {
+        if (!exts.hasOwnProperty(prop)) { continue }
+        if (modeObj.hasOwnProperty(prop)) { modeObj["_" + prop] = modeObj[prop]; }
+        modeObj[prop] = exts[prop];
+      }
+    }
+    modeObj.name = spec.name;
+    if (spec.helperType) { modeObj.helperType = spec.helperType; }
+    if (spec.modeProps) { for (var prop$1 in spec.modeProps)
+      { modeObj[prop$1] = spec.modeProps[prop$1]; } }
+
+    return modeObj
+  }
+
+  // This can be used to attach properties to mode objects from
+  // outside the actual mode definition.
+  var modeExtensions = {};
+  function extendMode(mode, properties) {
+    var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
+    copyObj(properties, exts);
+  }
+
+  function copyState(mode, state) {
+    if (state === true) { return state }
+    if (mode.copyState) { return mode.copyState(state) }
+    var nstate = {};
+    for (var n in state) {
+      var val = state[n];
+      if (val instanceof Array) { val = val.concat([]); }
+      nstate[n] = val;
+    }
+    return nstate
+  }
+
+  // Given a mode and a state (for that mode), find the inner mode and
+  // state at the position that the state refers to.
+  function innerMode(mode, state) {
+    var info;
+    while (mode.innerMode) {
+      info = mode.innerMode(state);
+      if (!info || info.mode == mode) { break }
+      state = info.state;
+      mode = info.mode;
+    }
+    return info || {mode: mode, state: state}
+  }
+
+  function startState(mode, a1, a2) {
+    return mode.startState ? mode.startState(a1, a2) : true
+  }
+
+  // STRING STREAM
+
+  // Fed to the mode parsers, provides helper functions to make
+  // parsers more succinct.
+
+  var StringStream = function(string, tabSize, lineOracle) {
+    this.pos = this.start = 0;
+    this.string = string;
+    this.tabSize = tabSize || 8;
+    this.lastColumnPos = this.lastColumnValue = 0;
+    this.lineStart = 0;
+    this.lineOracle = lineOracle;
+  };
+
+  StringStream.prototype.eol = function () {return this.pos >= this.string.length};
+  StringStream.prototype.sol = function () {return this.pos == this.lineStart};
+  StringStream.prototype.peek = function () {return this.string.charAt(this.pos) || undefined};
+  StringStream.prototype.next = function () {
+    if (this.pos < this.string.length)
+      { return this.string.charAt(this.pos++) }
+  };
+  StringStream.prototype.eat = function (match) {
+    var ch = this.string.charAt(this.pos);
+    var ok;
+    if (typeof match == "string") { ok = ch == match; }
+    else { ok = ch && (match.test ? match.test(ch) : match(ch)); }
+    if (ok) {++this.pos; return ch}
+  };
+  StringStream.prototype.eatWhile = function (match) {
+    var start = this.pos;
+    while (this.eat(match)){}
+    return this.pos > start
+  };
+  StringStream.prototype.eatSpace = function () {
+      var this$1 = this;
+
+    var start = this.pos;
+    while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) { ++this$1.pos; }
+    return this.pos > start
+  };
+  StringStream.prototype.skipToEnd = function () {this.pos = this.string.length;};
+  StringStream.prototype.skipTo = function (ch) {
+    var found = this.string.indexOf(ch, this.pos);
+    if (found > -1) {this.pos = found; return true}
+  };
+  StringStream.prototype.backUp = function (n) {this.pos -= n;};
+  StringStream.prototype.column = function () {
+    if (this.lastColumnPos < this.start) {
+      this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
+      this.lastColumnPos = this.start;
+    }
+    return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
+  };
+  StringStream.prototype.indentation = function () {
+    return countColumn(this.string, null, this.tabSize) -
+      (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
+  };
+  StringStream.prototype.match = function (pattern, consume, caseInsensitive) {
+    if (typeof pattern == "string") {
+      var cased = function (str) { return caseInsensitive ? str.toLowerCase() : str; };
+      var substr = this.string.substr(this.pos, pattern.length);
+      if (cased(substr) == cased(pattern)) {
+        if (consume !== false) { this.pos += pattern.length; }
+        return true
+      }
+    } else {
+      var match = this.string.slice(this.pos).match(pattern);
+      if (match && match.index > 0) { return null }
+      if (match && consume !== false) { this.pos += match[0].length; }
+      return match
+    }
+  };
+  StringStream.prototype.current = function (){return this.string.slice(this.start, this.pos)};
+  StringStream.prototype.hideFirstChars = function (n, inner) {
+    this.lineStart += n;
+    try { return inner() }
+    finally { this.lineStart -= n; }
+  };
+  StringStream.prototype.lookAhead = function (n) {
+    var oracle = this.lineOracle;
+    return oracle && oracle.lookAhead(n)
+  };
+  StringStream.prototype.baseToken = function () {
+    var oracle = this.lineOracle;
+    return oracle && oracle.baseToken(this.pos)
+  };
+
+  // Find the line object corresponding to the given line number.
+  function getLine(doc, n) {
+    n -= doc.first;
+    if (n < 0 || n >= doc.size) { throw new Error("There is no line " + (n + doc.first) + " in the document.") }
+    var chunk = doc;
+    while (!chunk.lines) {
+      for (var i = 0;; ++i) {
+        var child = chunk.children[i], sz = child.chunkSize();
+        if (n < sz) { chunk = child; break }
+        n -= sz;
+      }
+    }
+    return chunk.lines[n]
+  }
+
+  // Get the part of a document between two positions, as an array of
+  // strings.
+  function getBetween(doc, start, end) {
+    var out = [], n = start.line;
+    doc.iter(start.line, end.line + 1, function (line) {
+      var text = line.text;
+      if (n == end.line) { text = text.slice(0, end.ch); }
+      if (n == start.line) { text = text.slice(start.ch); }
+      out.push(text);
+      ++n;
+    });
+    return out
+  }
+  // Get the lines between from and to, as array of strings.
+  function getLines(doc, from, to) {
+    var out = [];
+    doc.iter(from, to, function (line) { out.push(line.text); }); // iter aborts when callback returns truthy value
+    return out
+  }
+
+  // Update the height of a line, propagating the height change
+  // upwards to parent nodes.
+  function updateLineHeight(line, height) {
+    var diff = height - line.height;
+    if (diff) { for (var n = line; n; n = n.parent) { n.height += diff; } }
+  }
+
+  // Given a line object, find its line number by walking up through
+  // its parent links.
+  function lineNo(line) {
+    if (line.parent == null) { return null }
+    var cur = line.parent, no = indexOf(cur.lines, line);
+    for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
+      for (var i = 0;; ++i) {
+        if (chunk.children[i] == cur) { break }
+        no += chunk.children[i].chunkSize();
+      }
+    }
+    return no + cur.first
+  }
+
+  // Find the line at the given vertical position, using the height
+  // information in the document tree.
+  function lineAtHeight(chunk, h) {
+    var n = chunk.first;
+    outer: do {
+      for (var i$1 = 0; i$1 < chunk.children.length; ++i$1) {
+        var child = chunk.children[i$1], ch = child.height;
+        if (h < ch) { chunk = child; continue outer }
+        h -= ch;
+        n += child.chunkSize();
+      }
+      return n
+    } while (!chunk.lines)
+    var i = 0;
+    for (; i < chunk.lines.length; ++i) {
+      var line = chunk.lines[i], lh = line.height;
+      if (h < lh) { break }
+      h -= lh;
+    }
+    return n + i
+  }
+
+  function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size}
+
+  function lineNumberFor(options, i) {
+    return String(options.lineNumberFormatter(i + options.firstLineNumber))
+  }
+
+  // A Pos instance represents a position within the text.
+  function Pos(line, ch, sticky) {
+    if ( sticky === void 0 ) sticky = null;
+
+    if (!(this instanceof Pos)) { return new Pos(line, ch, sticky) }
+    this.line = line;
+    this.ch = ch;
+    this.sticky = sticky;
+  }
+
+  // Compare two positions, return 0 if they are the same, a negative
+  // number when a is less, and a positive number otherwise.
+  function cmp(a, b) { return a.line - b.line || a.ch - b.ch }
+
+  function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 }
+
+  function copyPos(x) {return Pos(x.line, x.ch)}
+  function maxPos(a, b) { return cmp(a, b) < 0 ? b : a }
+  function minPos(a, b) { return cmp(a, b) < 0 ? a : b }
+
+  // Most of the external API clips given positions to make sure they
+  // actually exist within the document.
+  function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))}
+  function clipPos(doc, pos) {
+    if (pos.line < doc.first) { return Pos(doc.first, 0) }
+    var last = doc.first + doc.size - 1;
+    if (pos.line > last) { return Pos(last, getLine(doc, last).text.length) }
+    return clipToLen(pos, getLine(doc, pos.line).text.length)
+  }
+  function clipToLen(pos, linelen) {
+    var ch = pos.ch;
+    if (ch == null || ch > linelen) { return Pos(pos.line, linelen) }
+    else if (ch < 0) { return Pos(pos.line, 0) }
+    else { return pos }
+  }
+  function clipPosArray(doc, array) {
+    var out = [];
+    for (var i = 0; i < array.length; i++) { out[i] = clipPos(doc, array[i]); }
+    return out
+  }
+
+  var SavedContext = function(state, lookAhead) {
+    this.state = state;
+    this.lookAhead = lookAhead;
+  };
+
+  var Context = function(doc, state, line, lookAhead) {
+    this.state = state;
+    this.doc = doc;
+    this.line = line;
+    this.maxLookAhead = lookAhead || 0;
+    this.baseTokens = null;
+    this.baseTokenPos = 1;
+  };
+
+  Context.prototype.lookAhead = function (n) {
+    var line = this.doc.getLine(this.line + n);
+    if (line != null && n > this.maxLookAhead) { this.maxLookAhead = n; }
+    return line
+  };
+
+  Context.prototype.baseToken = function (n) {
+      var this$1 = this;
+
+    if (!this.baseTokens) { return null }
+    while (this.baseTokens[this.baseTokenPos] <= n)
+      { this$1.baseTokenPos += 2; }
+    var type = this.baseTokens[this.baseTokenPos + 1];
+    return {type: type && type.replace(/( |^)overlay .*/, ""),
+            size: this.baseTokens[this.baseTokenPos] - n}
+  };
+
+  Context.prototype.nextLine = function () {
+    this.line++;
+    if (this.maxLookAhead > 0) { this.maxLookAhead--; }
+  };
+
+  Context.fromSaved = function (doc, saved, line) {
+    if (saved instanceof SavedContext)
+      { return new Context(doc, copyState(doc.mode, saved.state), line, saved.lookAhead) }
+    else
+      { return new Context(doc, copyState(doc.mode, saved), line) }
+  };
+
+  Context.prototype.save = function (copy) {
+    var state = copy !== false ? copyState(this.doc.mode, this.state) : this.state;
+    return this.maxLookAhead > 0 ? new SavedContext(state, this.maxLookAhead) : state
+  };
+
+
+  // Compute a style array (an array starting with a mode generation
+  // -- for invalidation -- followed by pairs of end positions and
+  // style strings), which is used to highlight the tokens on the
+  // line.
+  function highlightLine(cm, line, context, forceToEnd) {
+    // A styles array always starts with a number identifying the
+    // mode/overlays that it is based on (for easy invalidation).
+    var st = [cm.state.modeGen], lineClasses = {};
+    // Compute the base array of styles
+    runMode(cm, line.text, cm.doc.mode, context, function (end, style) { return st.push(end, style); },
+            lineClasses, forceToEnd);
+    var state = context.state;
+
+    // Run overlays, adjust style array.
+    var loop = function ( o ) {
+      context.baseTokens = st;
+      var overlay = cm.state.overlays[o], i = 1, at = 0;
+      context.state = true;
+      runMode(cm, line.text, overlay.mode, context, function (end, style) {
+        var start = i;
+        // Ensure there's a token end at the current position, and that i points at it
+        while (at < end) {
+          var i_end = st[i];
+          if (i_end > end)
+            { st.splice(i, 1, end, st[i+1], i_end); }
+          i += 2;
+          at = Math.min(end, i_end);
+        }
+        if (!style) { return }
+        if (overlay.opaque) {
+          st.splice(start, i - start, end, "overlay " + style);
+          i = start + 2;
+        } else {
+          for (; start < i; start += 2) {
+            var cur = st[start+1];
+            st[start+1] = (cur ? cur + " " : "") + "overlay " + style;
+          }
+        }
+      }, lineClasses);
+      context.state = state;
+      context.baseTokens = null;
+      context.baseTokenPos = 1;
+    };
+
+    for (var o = 0; o < cm.state.overlays.length; ++o) loop( o );
+
+    return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}
+  }
+
+  function getLineStyles(cm, line, updateFrontier) {
+    if (!line.styles || line.styles[0] != cm.state.modeGen) {
+      var context = getContextBefore(cm, lineNo(line));
+      var resetState = line.text.length > cm.options.maxHighlightLength && copyState(cm.doc.mode, context.state);
+      var result = highlightLine(cm, line, context);
+      if (resetState) { context.state = resetState; }
+      line.stateAfter = context.save(!resetState);
+      line.styles = result.styles;
+      if (result.classes) { line.styleClasses = result.classes; }
+      else if (line.styleClasses) { line.styleClasses = null; }
+      if (updateFrontier === cm.doc.highlightFrontier)
+        { cm.doc.modeFrontier = Math.max(cm.doc.modeFrontier, ++cm.doc.highlightFrontier); }
+    }
+    return line.styles
+  }
+
+  function getContextBefore(cm, n, precise) {
+    var doc = cm.doc, display = cm.display;
+    if (!doc.mode.startState) { return new Context(doc, true, n) }
+    var start = findStartLine(cm, n, precise);
+    var saved = start > doc.first && getLine(doc, start - 1).stateAfter;
+    var context = saved ? Context.fromSaved(doc, saved, start) : new Context(doc, startState(doc.mode), start);
+
+    doc.iter(start, n, function (line) {
+      processLine(cm, line.text, context);
+      var pos = context.line;
+      line.stateAfter = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo ? context.save() : null;
+      context.nextLine();
+    });
+    if (precise) { doc.modeFrontier = context.line; }
+    return context
+  }
+
+  // Lightweight form of highlight -- proceed over this line and
+  // update state, but don't save a style array. Used for lines that
+  // aren't currently visible.
+  function processLine(cm, text, context, startAt) {
+    var mode = cm.doc.mode;
+    var stream = new StringStream(text, cm.options.tabSize, context);
+    stream.start = stream.pos = startAt || 0;
+    if (text == "") { callBlankLine(mode, context.state); }
+    while (!stream.eol()) {
+      readToken(mode, stream, context.state);
+      stream.start = stream.pos;
+    }
+  }
+
+  function callBlankLine(mode, state) {
+    if (mode.blankLine) { return mode.blankLine(state) }
+    if (!mode.innerMode) { return }
+    var inner = innerMode(mode, state);
+    if (inner.mode.blankLine) { return inner.mode.blankLine(inner.state) }
+  }
+
+  function readToken(mode, stream, state, inner) {
+    for (var i = 0; i < 10; i++) {
+      if (inner) { inner[0] = innerMode(mode, state).mode; }
+      var style = mode.token(stream, state);
+      if (stream.pos > stream.start) { return style }
+    }
+    throw new Error("Mode " + mode.name + " failed to advance stream.")
+  }
+
+  var Token = function(stream, type, state) {
+    this.start = stream.start; this.end = stream.pos;
+    this.string = stream.current();
+    this.type = type || null;
+    this.state = state;
+  };
+
+  // Utility for getTokenAt and getLineTokens
+  function takeToken(cm, pos, precise, asArray) {
+    var doc = cm.doc, mode = doc.mode, style;
+    pos = clipPos(doc, pos);
+    var line = getLine(doc, pos.line), context = getContextBefore(cm, pos.line, precise);
+    var stream = new StringStream(line.text, cm.options.tabSize, context), tokens;
+    if (asArray) { tokens = []; }
+    while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
+      stream.start = stream.pos;
+      style = readToken(mode, stream, context.state);
+      if (asArray) { tokens.push(new Token(stream, style, copyState(doc.mode, context.state))); }
+    }
+    return asArray ? tokens : new Token(stream, style, context.state)
+  }
+
+  function extractLineClasses(type, output) {
+    if (type) { for (;;) {
+      var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/);
+      if (!lineClass) { break }
+      type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length);
+      var prop = lineClass[1] ? "bgClass" : "textClass";
+      if (output[prop] == null)
+        { output[prop] = lineClass[2]; }
+      else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
+        { output[prop] += " " + lineClass[2]; }
+    } }
+    return type
+  }
+
+  // Run the given mode's parser over a line, calling f for each token.
+  function runMode(cm, text, mode, context, f, lineClasses, forceToEnd) {
+    var flattenSpans = mode.flattenSpans;
+    if (flattenSpans == null) { flattenSpans = cm.options.flattenSpans; }
+    var curStart = 0, curStyle = null;
+    var stream = new StringStream(text, cm.options.tabSize, context), style;
+    var inner = cm.options.addModeClass && [null];
+    if (text == "") { extractLineClasses(callBlankLine(mode, context.state), lineClasses); }
+    while (!stream.eol()) {
+      if (stream.pos > cm.options.maxHighlightLength) {
+        flattenSpans = false;
+        if (forceToEnd) { processLine(cm, text, context, stream.pos); }
+        stream.pos = text.length;
+        style = null;
+      } else {
+        style = extractLineClasses(readToken(mode, stream, context.state, inner), lineClasses);
+      }
+      if (inner) {
+        var mName = inner[0].name;
+        if (mName) { style = "m-" + (style ? mName + " " + style : mName); }
+      }
+      if (!flattenSpans || curStyle != style) {
+        while (curStart < stream.start) {
+          curStart = Math.min(stream.start, curStart + 5000);
+          f(curStart, curStyle);
+        }
+        curStyle = style;
+      }
+      stream.start = stream.pos;
+    }
+    while (curStart < stream.pos) {
+      // Webkit seems to refuse to render text nodes longer than 57444
+      // characters, and returns inaccurate measurements in nodes
+      // starting around 5000 chars.
+      var pos = Math.min(stream.pos, curStart + 5000);
+      f(pos, curStyle);
+      curStart = pos;
+    }
+  }
+
+  // Finds the line to start with when starting a parse. Tries to
+  // find a line with a stateAfter, so that it can start with a
+  // valid state. If that fails, it returns the line with the
+  // smallest indentation, which tends to need the least context to
+  // parse correctly.
+  function findStartLine(cm, n, precise) {
+    var minindent, minline, doc = cm.doc;
+    var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
+    for (var search = n; search > lim; --search) {
+      if (search <= doc.first) { return doc.first }
+      var line = getLine(doc, search - 1), after = line.stateAfter;
+      if (after && (!precise || search + (after instanceof SavedContext ? after.lookAhead : 0) <= doc.modeFrontier))
+        { return search }
+      var indented = countColumn(line.text, null, cm.options.tabSize);
+      if (minline == null || minindent > indented) {
+        minline = search - 1;
+        minindent = indented;
+      }
+    }
+    return minline
+  }
+
+  function retreatFrontier(doc, n) {
+    doc.modeFrontier = Math.min(doc.modeFrontier, n);
+    if (doc.highlightFrontier < n - 10) { return }
+    var start = doc.first;
+    for (var line = n - 1; line > start; line--) {
+      var saved = getLine(doc, line).stateAfter;
+      // change is on 3
+      // state on line 1 looked ahead 2 -- so saw 3
+      // test 1 + 2 < 3 should cover this
+      if (saved && (!(saved instanceof SavedContext) || line + saved.lookAhead < n)) {
+        start = line + 1;
+        break
+      }
+    }
+    doc.highlightFrontier = Math.min(doc.highlightFrontier, start);
+  }
+
+  // Optimize some code when these features are not used.
+  var sawReadOnlySpans = false, sawCollapsedSpans = false;
+
+  function seeReadOnlySpans() {
+    sawReadOnlySpans = true;
+  }
+
+  function seeCollapsedSpans() {
+    sawCollapsedSpans = true;
+  }
+
+  // TEXTMARKER SPANS
+
+  function MarkedSpan(marker, from, to) {
+    this.marker = marker;
+    this.from = from; this.to = to;
+  }
+
+  // Search an array of spans for a span matching the given marker.
+  function getMarkedSpanFor(spans, marker) {
+    if (spans) { for (var i = 0; i < spans.length; ++i) {
+      var span = spans[i];
+      if (span.marker == marker) { return span }
+    } }
+  }
+  // Remove a span from an array, returning undefined if no spans are
+  // left (we don't store arrays for lines without spans).
+  function removeMarkedSpan(spans, span) {
+    var r;
+    for (var i = 0; i < spans.length; ++i)
+      { if (spans[i] != span) { (r || (r = [])).push(spans[i]); } }
+    return r
+  }
+  // Add a span to a line.
+  function addMarkedSpan(line, span) {
+    line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
+    span.marker.attachLine(line);
+  }
+
+  // Used for the algorithm that adjusts markers for a change in the
+  // document. These functions cut an array of spans at a given
+  // character position, returning an array of remaining chunks (or
+  // undefined if nothing remains).
+  function markedSpansBefore(old, startCh, isInsert) {
+    var nw;
+    if (old) { for (var i = 0; i < old.length; ++i) {
+      var span = old[i], marker = span.marker;
+      var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
+      if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
+        var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh)
+        ;(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to));
+      }
+    } }
+    return nw
+  }
+  function markedSpansAfter(old, endCh, isInsert) {
+    var nw;
+    if (old) { for (var i = 0; i < old.length; ++i) {
+      var span = old[i], marker = span.marker;
+      var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
+      if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
+        var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh)
+        ;(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
+                                              span.to == null ? null : span.to - endCh));
+      }
+    } }
+    return nw
+  }
+
+  // Given a change object, compute the new set of marker spans that
+  // cover the line in which the change took place. Removes spans
+  // entirely within the change, reconnects spans belonging to the
+  // same marker that appear on both sides of the change, and cuts off
+  // spans partially within the change. Returns an array of span
+  // arrays with one element for each line in (after) the change.
+  function stretchSpansOverChange(doc, change) {
+    if (change.full) { return null }
+    var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
+    var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
+    if (!oldFirst && !oldLast) { return null }
+
+    var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0;
+    // Get the spans that 'stick out' on both sides
+    var first = markedSpansBefore(oldFirst, startCh, isInsert);
+    var last = markedSpansAfter(oldLast, endCh, isInsert);
+
+    // Next, merge those two ends
+    var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
+    if (first) {
+      // Fix up .to properties of first
+      for (var i = 0; i < first.length; ++i) {
+        var span = first[i];
+        if (span.to == null) {
+          var found = getMarkedSpanFor(last, span.marker);
+          if (!found) { span.to = startCh; }
+          else if (sameLine) { span.to = found.to == null ? null : found.to + offset; }
+        }
+      }
+    }
+    if (last) {
+      // Fix up .from in last (or move them into first in case of sameLine)
+      for (var i$1 = 0; i$1 < last.length; ++i$1) {
+        var span$1 = last[i$1];
+        if (span$1.to != null) { span$1.to += offset; }
+        if (span$1.from == null) {
+          var found$1 = getMarkedSpanFor(first, span$1.marker);
+          if (!found$1) {
+            span$1.from = offset;
+            if (sameLine) { (first || (first = [])).push(span$1); }
+          }
+        } else {
+          span$1.from += offset;
+          if (sameLine) { (first || (first = [])).push(span$1); }
+        }
+      }
+    }
+    // Make sure we didn't create any zero-length spans
+    if (first) { first = clearEmptySpans(first); }
+    if (last && last != first) { last = clearEmptySpans(last); }
+
+    var newMarkers = [first];
+    if (!sameLine) {
+      // Fill gap with whole-line-spans
+      var gap = change.text.length - 2, gapMarkers;
+      if (gap > 0 && first)
+        { for (var i$2 = 0; i$2 < first.length; ++i$2)
+          { if (first[i$2].to == null)
+            { (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i$2].marker, null, null)); } } }
+      for (var i$3 = 0; i$3 < gap; ++i$3)
+        { newMarkers.push(gapMarkers); }
+      newMarkers.push(last);
+    }
+    return newMarkers
+  }
+
+  // Remove spans that are empty and don't have a clearWhenEmpty
+  // option of false.
+  function clearEmptySpans(spans) {
+    for (var i = 0; i < spans.length; ++i) {
+      var span = spans[i];
+      if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
+        { spans.splice(i--, 1); }
+    }
+    if (!spans.length) { return null }
+    return spans
+  }
+
+  // Used to 'clip' out readOnly ranges when making a change.
+  function removeReadOnlyRanges(doc, from, to) {
+    var markers = null;
+    doc.iter(from.line, to.line + 1, function (line) {
+      if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
+        var mark = line.markedSpans[i].marker;
+        if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
+          { (markers || (markers = [])).push(mark); }
+      } }
+    });
+    if (!markers) { return null }
+    var parts = [{from: from, to: to}];
+    for (var i = 0; i < markers.length; ++i) {
+      var mk = markers[i], m = mk.find(0);
+      for (var j = 0; j < parts.length; ++j) {
+        var p = parts[j];
+        if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) { continue }
+        var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to);
+        if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
+          { newParts.push({from: p.from, to: m.from}); }
+        if (dto > 0 || !mk.inclusiveRight && !dto)
+          { newParts.push({from: m.to, to: p.to}); }
+        parts.splice.apply(parts, newParts);
+        j += newParts.length - 3;
+      }
+    }
+    return parts
+  }
+
+  // Connect or disconnect spans from a line.
+  function detachMarkedSpans(line) {
+    var spans = line.markedSpans;
+    if (!spans) { return }
+    for (var i = 0; i < spans.length; ++i)
+      { spans[i].marker.detachLine(line); }
+    line.markedSpans = null;
+  }
+  function attachMarkedSpans(line, spans) {
+    if (!spans) { return }
+    for (var i = 0; i < spans.length; ++i)
+      { spans[i].marker.attachLine(line); }
+    line.markedSpans = spans;
+  }
+
+  // Helpers used when computing which overlapping collapsed span
+  // counts as the larger one.
+  function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0 }
+  function extraRight(marker) { return marker.inclusiveRight ? 1 : 0 }
+
+  // Returns a number indicating which of two overlapping collapsed
+  // spans is larger (and thus includes the other). Falls back to
+  // comparing ids when the spans cover exactly the same range.
+  function compareCollapsedMarkers(a, b) {
+    var lenDiff = a.lines.length - b.lines.length;
+    if (lenDiff != 0) { return lenDiff }
+    var aPos = a.find(), bPos = b.find();
+    var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
+    if (fromCmp) { return -fromCmp }
+    var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
+    if (toCmp) { return toCmp }
+    return b.id - a.id
+  }
+
+  // Find out whether a line ends or starts in a collapsed span. If
+  // so, return the marker for that span.
+  function collapsedSpanAtSide(line, start) {
+    var sps = sawCollapsedSpans && line.markedSpans, found;
+    if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
+      sp = sps[i];
+      if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
+          (!found || compareCollapsedMarkers(found, sp.marker) < 0))
+        { found = sp.marker; }
+    } }
+    return found
+  }
+  function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true) }
+  function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false) }
+
+  function collapsedSpanAround(line, ch) {
+    var sps = sawCollapsedSpans && line.markedSpans, found;
+    if (sps) { for (var i = 0; i < sps.length; ++i) {
+      var sp = sps[i];
+      if (sp.marker.collapsed && (sp.from == null || sp.from < ch) && (sp.to == null || sp.to > ch) &&
+          (!found || compareCollapsedMarkers(found, sp.marker) < 0)) { found = sp.marker; }
+    } }
+    return found
+  }
+
+  // Test whether there exists a collapsed span that partially
+  // overlaps (covers the start or end, but not both) of a new span.
+  // Such overlap is not allowed.
+  function conflictingCollapsedRange(doc, lineNo$$1, from, to, marker) {
+    var line = getLine(doc, lineNo$$1);
+    var sps = sawCollapsedSpans && line.markedSpans;
+    if (sps) { for (var i = 0; i < sps.length; ++i) {
+      var sp = sps[i];
+      if (!sp.marker.collapsed) { continue }
+      var found = sp.marker.find(0);
+      var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
+      var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
+      if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) { continue }
+      if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
+          fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
+        { return true }
+    } }
+  }
+
+  // A visual line is a line as drawn on the screen. Folding, for
+  // example, can cause multiple logical lines to appear on the same
+  // visual line. This finds the start of the visual line that the
+  // given line is part of (usually that is the line itself).
+  function visualLine(line) {
+    var merged;
+    while (merged = collapsedSpanAtStart(line))
+      { line = merged.find(-1, true).line; }
+    return line
+  }
+
+  function visualLineEnd(line) {
+    var merged;
+    while (merged = collapsedSpanAtEnd(line))
+      { line = merged.find(1, true).line; }
+    return line
+  }
+
+  // Returns an array of logical lines that continue the visual line
+  // started by the argument, or undefined if there are no such lines.
+  function visualLineContinued(line) {
+    var merged, lines;
+    while (merged = collapsedSpanAtEnd(line)) {
+      line = merged.find(1, true).line
+      ;(lines || (lines = [])).push(line);
+    }
+    return lines
+  }
+
+  // Get the line number of the start of the visual line that the
+  // given line number is part of.
+  function visualLineNo(doc, lineN) {
+    var line = getLine(doc, lineN), vis = visualLine(line);
+    if (line == vis) { return lineN }
+    return lineNo(vis)
+  }
+
+  // Get the line number of the start of the next visual line after
+  // the given line.
+  function visualLineEndNo(doc, lineN) {
+    if (lineN > doc.lastLine()) { return lineN }
+    var line = getLine(doc, lineN), merged;
+    if (!lineIsHidden(doc, line)) { return lineN }
+    while (merged = collapsedSpanAtEnd(line))
+      { line = merged.find(1, true).line; }
+    return lineNo(line) + 1
+  }
+
+  // Compute whether a line is hidden. Lines count as hidden when they
+  // are part of a visual line that starts with another line, or when
+  // they are entirely covered by collapsed, non-widget span.
+  function lineIsHidden(doc, line) {
+    var sps = sawCollapsedSpans && line.markedSpans;
+    if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
+      sp = sps[i];
+      if (!sp.marker.collapsed) { continue }
+      if (sp.from == null) { return true }
+      if (sp.marker.widgetNode) { continue }
+      if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
+        { return true }
+    } }
+  }
+  function lineIsHiddenInner(doc, line, span) {
+    if (span.to == null) {
+      var end = span.marker.find(1, true);
+      return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker))
+    }
+    if (span.marker.inclusiveRight && span.to == line.text.length)
+      { return true }
+    for (var sp = (void 0), i = 0; i < line.markedSpans.length; ++i) {
+      sp = line.markedSpans[i];
+      if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
+          (sp.to == null || sp.to != span.from) &&
+          (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
+          lineIsHiddenInner(doc, line, sp)) { return true }
+    }
+  }
+
+  // Find the height above the given line.
+  function heightAtLine(lineObj) {
+    lineObj = visualLine(lineObj);
+
+    var h = 0, chunk = lineObj.parent;
+    for (var i = 0; i < chunk.lines.length; ++i) {
+      var line = chunk.lines[i];
+      if (line == lineObj) { break }
+      else { h += line.height; }
+    }
+    for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
+      for (var i$1 = 0; i$1 < p.children.length; ++i$1) {
+        var cur = p.children[i$1];
+        if (cur == chunk) { break }
+        else { h += cur.height; }
+      }
+    }
+    return h
+  }
+
+  // Compute the character length of a line, taking into account
+  // collapsed ranges (see markText) that might hide parts, and join
+  // other lines onto it.
+  function lineLength(line) {
+    if (line.height == 0) { return 0 }
+    var len = line.text.length, merged, cur = line;
+    while (merged = collapsedSpanAtStart(cur)) {
+      var found = merged.find(0, true);
+      cur = found.from.line;
+      len += found.from.ch - found.to.ch;
+    }
+    cur = line;
+    while (merged = collapsedSpanAtEnd(cur)) {
+      var found$1 = merged.find(0, true);
+      len -= cur.text.length - found$1.from.ch;
+      cur = found$1.to.line;
+      len += cur.text.length - found$1.to.ch;
+    }
+    return len
+  }
+
+  // Find the longest line in the document.
+  function findMaxLine(cm) {
+    var d = cm.display, doc = cm.doc;
+    d.maxLine = getLine(doc, doc.first);
+    d.maxLineLength = lineLength(d.maxLine);
+    d.maxLineChanged = true;
+    doc.iter(function (line) {
+      var len = lineLength(line);
+      if (len > d.maxLineLength) {
+        d.maxLineLength = len;
+        d.maxLine = line;
+      }
+    });
+  }
+
+  // LINE DATA STRUCTURE
+
+  // Line objects. These hold state related to a line, including
+  // highlighting info (the styles array).
+  var Line = function(text, markedSpans, estimateHeight) {
+    this.text = text;
+    attachMarkedSpans(this, markedSpans);
+    this.height = estimateHeight ? estimateHeight(this) : 1;
+  };
+
+  Line.prototype.lineNo = function () { return lineNo(this) };
+  eventMixin(Line);
+
+  // Change the content (text, markers) of a line. Automatically
+  // invalidates cached information and tries to re-estimate the
+  // line's height.
+  function updateLine(line, text, markedSpans, estimateHeight) {
+    line.text = text;
+    if (line.stateAfter) { line.stateAfter = null; }
+    if (line.styles) { line.styles = null; }
+    if (line.order != null) { line.order = null; }
+    detachMarkedSpans(line);
+    attachMarkedSpans(line, markedSpans);
+    var estHeight = estimateHeight ? estimateHeight(line) : 1;
+    if (estHeight != line.height) { updateLineHeight(line, estHeight); }
+  }
+
+  // Detach a line from the document tree and its markers.
+  function cleanUpLine(line) {
+    line.parent = null;
+    detachMarkedSpans(line);
+  }
+
+  // Convert a style as returned by a mode (either null, or a string
+  // containing one or more styles) to a CSS style. This is cached,
+  // and also looks for line-wide styles.
+  var styleToClassCache = {}, styleToClassCacheWithMode = {};
+  function interpretTokenStyle(style, options) {
+    if (!style || /^\s*$/.test(style)) { return null }
+    var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
+    return cache[style] ||
+      (cache[style] = style.replace(/\S+/g, "cm-$&"))
+  }
+
+  // Render the DOM representation of the text of a line. Also builds
+  // up a 'line map', which points at the DOM nodes that represent
+  // specific stretches of text, and is used by the measuring code.
+  // The returned object contains the DOM node, this map, and
+  // information about line-wide styles that were set by the mode.
+  function buildLineContent(cm, lineView) {
+    // The padding-right forces the element to have a 'border', which
+    // is needed on Webkit to be able to get line-level bounding
+    // rectangles for it (in measureChar).
+    var content = eltP("span", null, null, webkit ? "padding-right: .1px" : null);
+    var builder = {pre: eltP("pre", [content], "CodeMirror-line"), content: content,
+                   col: 0, pos: 0, cm: cm,
+                   trailingSpace: false,
+                   splitSpaces: cm.getOption("lineWrapping")};
+    lineView.measure = {};
+
+    // Iterate over the logical lines that make up this visual line.
+    for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
+      var line = i ? lineView.rest[i - 1] : lineView.line, order = (void 0);
+      builder.pos = 0;
+      builder.addToken = buildToken;
+      // Optionally wire in some hacks into the token-rendering
+      // algorithm, to deal with browser quirks.
+      if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line, cm.doc.direction)))
+        { builder.addToken = buildTokenBadBidi(builder.addToken, order); }
+      builder.map = [];
+      var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line);
+      insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate));
+      if (line.styleClasses) {
+        if (line.styleClasses.bgClass)
+          { builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || ""); }
+        if (line.styleClasses.textClass)
+          { builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || ""); }
+      }
+
+      // Ensure at least a single node is present, for measuring.
+      if (builder.map.length == 0)
+        { builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))); }
+
+      // Store the map and a cache object for the current logical line
+      if (i == 0) {
+        lineView.measure.map = builder.map;
+        lineView.measure.cache = {};
+      } else {
+  (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
+        ;(lineView.measure.caches || (lineView.measure.caches = [])).push({});
+      }
+    }
+
+    // See issue #2901
+    if (webkit) {
+      var last = builder.content.lastChild;
+      if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
+        { builder.content.className = "cm-tab-wrap-hack"; }
+    }
+
+    signal(cm, "renderLine", cm, lineView.line, builder.pre);
+    if (builder.pre.className)
+      { builder.textClass = joinClasses(builder.pre.className, builder.textClass || ""); }
+
+    return builder
+  }
+
+  function defaultSpecialCharPlaceholder(ch) {
+    var token = elt("span", "\u2022", "cm-invalidchar");
+    token.title = "\\u" + ch.charCodeAt(0).toString(16);
+    token.setAttribute("aria-label", token.title);
+    return token
+  }
+
+  // Build up the DOM representation for a single token, and add it to
+  // the line map. Takes care to render special characters separately.
+  function buildToken(builder, text, style, startStyle, endStyle, css, attributes) {
+    if (!text) { return }
+    var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text;
+    var special = builder.cm.state.specialChars, mustWrap = false;
+    var content;
+    if (!special.test(text)) {
+      builder.col += text.length;
+      content = document.createTextNode(displayText);
+      builder.map.push(builder.pos, builder.pos + text.length, content);
+      if (ie && ie_version < 9) { mustWrap = true; }
+      builder.pos += text.length;
+    } else {
+      content = document.createDocumentFragment();
+      var pos = 0;
+      while (true) {
+        special.lastIndex = pos;
+        var m = special.exec(text);
+        var skipped = m ? m.index - pos : text.length - pos;
+        if (skipped) {
+          var txt = document.createTextNode(displayText.slice(pos, pos + skipped));
+          if (ie && ie_version < 9) { content.appendChild(elt("span", [txt])); }
+          else { content.appendChild(txt); }
+          builder.map.push(builder.pos, builder.pos + skipped, txt);
+          builder.col += skipped;
+          builder.pos += skipped;
+        }
+        if (!m) { break }
+        pos += skipped + 1;
+        var txt$1 = (void 0);
+        if (m[0] == "\t") {
+          var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
+          txt$1 = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
+          txt$1.setAttribute("role", "presentation");
+          txt$1.setAttribute("cm-text", "\t");
+          builder.col += tabWidth;
+        } else if (m[0] == "\r" || m[0] == "\n") {
+          txt$1 = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"));
+          txt$1.setAttribute("cm-text", m[0]);
+          builder.col += 1;
+        } else {
+          txt$1 = builder.cm.options.specialCharPlaceholder(m[0]);
+          txt$1.setAttribute("cm-text", m[0]);
+          if (ie && ie_version < 9) { content.appendChild(elt("span", [txt$1])); }
+          else { content.appendChild(txt$1); }
+          builder.col += 1;
+        }
+        builder.map.push(builder.pos, builder.pos + 1, txt$1);
+        builder.pos++;
+      }
+    }
+    builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32;
+    if (style || startStyle || endStyle || mustWrap || css) {
+      var fullStyle = style || "";
+      if (startStyle) { fullStyle += startStyle; }
+      if (endStyle) { fullStyle += endStyle; }
+      var token = elt("span", [content], fullStyle, css);
+      if (attributes) {
+        for (var attr in attributes) { if (attributes.hasOwnProperty(attr) && attr != "style" && attr != "class")
+          { token.setAttribute(attr, attributes[attr]); } }
+      }
+      return builder.content.appendChild(token)
+    }
+    builder.content.appendChild(content);
+  }
+
+  // Change some spaces to NBSP to prevent the browser from collapsing
+  // trailing spaces at the end of a line when rendering text (issue #1362).
+  function splitSpaces(text, trailingBefore) {
+    if (text.length > 1 && !/  /.test(text)) { return text }
+    var spaceBefore = trailingBefore, result = "";
+    for (var i = 0; i < text.length; i++) {
+      var ch = text.charAt(i);
+      if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
+        { ch = "\u00a0"; }
+      result += ch;
+      spaceBefore = ch == " ";
+    }
+    return result
+  }
+
+  // Work around nonsense dimensions being reported for stretches of
+  // right-to-left text.
+  function buildTokenBadBidi(inner, order) {
+    return function (builder, text, style, startStyle, endStyle, css, attributes) {
+      style = style ? style + " cm-force-border" : "cm-force-border";
+      var start = builder.pos, end = start + text.length;
+      for (;;) {
+        // Find the part that overlaps with the start of this text
+        var part = (void 0);
+        for (var i = 0; i < order.length; i++) {
+          part = order[i];
+          if (part.to > start && part.from <= start) { break }
+        }
+        if (part.to >= end) { return inner(builder, text, style, startStyle, endStyle, css, attributes) }
+        inner(builder, text.slice(0, part.to - start), style, startStyle, null, css, attributes);
+        startStyle = null;
+        text = text.slice(part.to - start);
+        start = part.to;
+      }
+    }
+  }
+
+  function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
+    var widget = !ignoreWidget && marker.widgetNode;
+    if (widget) { builder.map.push(builder.pos, builder.pos + size, widget); }
+    if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
+      if (!widget)
+        { widget = builder.content.appendChild(document.createElement("span")); }
+      widget.setAttribute("cm-marker", marker.id);
+    }
+    if (widget) {
+      builder.cm.display.input.setUneditable(widget);
+      builder.content.appendChild(widget);
+    }
+    builder.pos += size;
+    builder.trailingSpace = false;
+  }
+
+  // Outputs a number of spans to make up a line, taking highlighting
+  // and marked text into account.
+  function insertLineContent(line, builder, styles) {
+    var spans = line.markedSpans, allText = line.text, at = 0;
+    if (!spans) {
+      for (var i$1 = 1; i$1 < styles.length; i$1+=2)
+        { builder.addToken(builder, allText.slice(at, at = styles[i$1]), interpretTokenStyle(styles[i$1+1], builder.cm.options)); }
+      return
+    }
+
+    var len = allText.length, pos = 0, i = 1, text = "", style, css;
+    var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, collapsed, attributes;
+    for (;;) {
+      if (nextChange == pos) { // Update current marker set
+        spanStyle = spanEndStyle = spanStartStyle = css = "";
+        attributes = null;
+        collapsed = null; nextChange = Infinity;
+        var foundBookmarks = [], endStyles = (void 0);
+        for (var j = 0; j < spans.length; ++j) {
+          var sp = spans[j], m = sp.marker;
+          if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
+            foundBookmarks.push(m);
+          } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
+            if (sp.to != null && sp.to != pos && nextChange > sp.to) {
+              nextChange = sp.to;
+              spanEndStyle = "";
+            }
+            if (m.className) { spanStyle += " " + m.className; }
+            if (m.css) { css = (css ? css + ";" : "") + m.css; }
+            if (m.startStyle && sp.from == pos) { spanStartStyle += " " + m.startStyle; }
+            if (m.endStyle && sp.to == nextChange) { (endStyles || (endStyles = [])).push(m.endStyle, sp.to); }
+            // support for the old title property
+            // https://github.com/codemirror/CodeMirror/pull/5673
+            if (m.title) { (attributes || (attributes = {})).title = m.title; }
+            if (m.attributes) {
+              for (var attr in m.attributes)
+                { (attributes || (attributes = {}))[attr] = m.attributes[attr]; }
+            }
+            if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
+              { collapsed = sp; }
+          } else if (sp.from > pos && nextChange > sp.from) {
+            nextChange = sp.from;
+          }
+        }
+        if (endStyles) { for (var j$1 = 0; j$1 < endStyles.length; j$1 += 2)
+          { if (endStyles[j$1 + 1] == nextChange) { spanEndStyle += " " + endStyles[j$1]; } } }
+
+        if (!collapsed || collapsed.from == pos) { for (var j$2 = 0; j$2 < foundBookmarks.length; ++j$2)
+          { buildCollapsedSpan(builder, 0, foundBookmarks[j$2]); } }
+        if (collapsed && (collapsed.from || 0) == pos) {
+          buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
+                             collapsed.marker, collapsed.from == null);
+          if (collapsed.to == null) { return }
+          if (collapsed.to == pos) { collapsed = false; }
+        }
+      }
+      if (pos >= len) { break }
+
+      var upto = Math.min(len, nextChange);
+      while (true) {
+        if (text) {
+          var end = pos + text.length;
+          if (!collapsed) {
+            var tokenText = end > upto ? text.slice(0, upto - pos) : text;
+            builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
+                             spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", css, attributes);
+          }
+          if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
+          pos = end;
+          spanStartStyle = "";
+        }
+        text = allText.slice(at, at = styles[i++]);
+        style = interpretTokenStyle(styles[i++], builder.cm.options);
+      }
+    }
+  }
+
+
+  // These objects are used to represent the visible (currently drawn)
+  // part of the document. A LineView may correspond to multiple
+  // logical lines, if those are connected by collapsed ranges.
+  function LineView(doc, line, lineN) {
+    // The starting line
+    this.line = line;
+    // Continuing lines, if any
+    this.rest = visualLineContinued(line);
+    // Number of logical lines in this visual line
+    this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1;
+    this.node = this.text = null;
+    this.hidden = lineIsHidden(doc, line);
+  }
+
+  // Create a range of LineView objects for the given lines.
+  function buildViewArray(cm, from, to) {
+    var array = [], nextPos;
+    for (var pos = from; pos < to; pos = nextPos) {
+      var view = new LineView(cm.doc, getLine(cm.doc, pos), pos);
+      nextPos = pos + view.size;
+      array.push(view);
+    }
+    return array
+  }
+
+  var operationGroup = null;
+
+  function pushOperation(op) {
+    if (operationGroup) {
+      operationGroup.ops.push(op);
+    } else {
+      op.ownsGroup = operationGroup = {
+        ops: [op],
+        delayedCallbacks: []
+      };
+    }
+  }
+
+  function fireCallbacksForOps(group) {
+    // Calls delayed callbacks and cursorActivity handlers until no
+    // new ones appear
+    var callbacks = group.delayedCallbacks, i = 0;
+    do {
+      for (; i < callbacks.length; i++)
+        { callbacks[i].call(null); }
+      for (var j = 0; j < group.ops.length; j++) {
+        var op = group.ops[j];
+        if (op.cursorActivityHandlers)
+          { while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
+            { op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm); } }
+      }
+    } while (i < callbacks.length)
+  }
+
+  function finishOperation(op, endCb) {
+    var group = op.ownsGroup;
+    if (!group) { return }
+
+    try { fireCallbacksForOps(group); }
+    finally {
+      operationGroup = null;
+      endCb(group);
+    }
+  }
+
+  var orphanDelayedCallbacks = null;
+
+  // Often, we want to signal events at a point where we are in the
+  // middle of some work, but don't want the handler to start calling
+  // other methods on the editor, which might be in an inconsistent
+  // state or simply not expect any other events to happen.
+  // signalLater looks whether there are any handlers, and schedules
+  // them to be executed when the last operation ends, or, if no
+  // operation is active, when a timeout fires.
+  function signalLater(emitter, type /*, values...*/) {
+    var arr = getHandlers(emitter, type);
+    if (!arr.length) { return }
+    var args = Array.prototype.slice.call(arguments, 2), list;
+    if (operationGroup) {
+      list = operationGroup.delayedCallbacks;
+    } else if (orphanDelayedCallbacks) {
+      list = orphanDelayedCallbacks;
+    } else {
+      list = orphanDelayedCallbacks = [];
+      setTimeout(fireOrphanDelayed, 0);
+    }
+    var loop = function ( i ) {
+      list.push(function () { return arr[i].apply(null, args); });
+    };
+
+    for (var i = 0; i < arr.length; ++i)
+      loop( i );
+  }
+
+  function fireOrphanDelayed() {
+    var delayed = orphanDelayedCallbacks;
+    orphanDelayedCallbacks = null;
+    for (var i = 0; i < delayed.length; ++i) { delayed[i](); }
+  }
+
+  // When an aspect of a line changes, a string is added to
+  // lineView.changes. This updates the relevant part of the line's
+  // DOM structure.
+  function updateLineForChanges(cm, lineView, lineN, dims) {
+    for (var j = 0; j < lineView.changes.length; j++) {
+      var type = lineView.changes[j];
+      if (type == "text") { updateLineText(cm, lineView); }
+      else if (type == "gutter") { updateLineGutter(cm, lineView, lineN, dims); }
+      else if (type == "class") { updateLineClasses(cm, lineView); }
+      else if (type == "widget") { updateLineWidgets(cm, lineView, dims); }
+    }
+    lineView.changes = null;
+  }
+
+  // Lines with gutter elements, widgets or a background class need to
+  // be wrapped, and have the extra elements added to the wrapper div
+  function ensureLineWrapped(lineView) {
+    if (lineView.node == lineView.text) {
+      lineView.node = elt("div", null, null, "position: relative");
+      if (lineView.text.parentNode)
+        { lineView.text.parentNode.replaceChild(lineView.node, lineView.text); }
+      lineView.node.appendChild(lineView.text);
+      if (ie && ie_version < 8) { lineView.node.style.zIndex = 2; }
+    }
+    return lineView.node
+  }
+
+  function updateLineBackground(cm, lineView) {
+    var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass;
+    if (cls) { cls += " CodeMirror-linebackground"; }
+    if (lineView.background) {
+      if (cls) { lineView.background.className = cls; }
+      else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null; }
+    } else if (cls) {
+      var wrap = ensureLineWrapped(lineView);
+      lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild);
+      cm.display.input.setUneditable(lineView.background);
+    }
+  }
+
+  // Wrapper around buildLineContent which will reuse the structure
+  // in display.externalMeasured when possible.
+  function getLineContent(cm, lineView) {
+    var ext = cm.display.externalMeasured;
+    if (ext && ext.line == lineView.line) {
+      cm.display.externalMeasured = null;
+      lineView.measure = ext.measure;
+      return ext.built
+    }
+    return buildLineContent(cm, lineView)
+  }
+
+  // Redraw the line's text. Interacts with the background and text
+  // classes because the mode may output tokens that influence these
+  // classes.
+  function updateLineText(cm, lineView) {
+    var cls = lineView.text.className;
+    var built = getLineContent(cm, lineView);
+    if (lineView.text == lineView.node) { lineView.node = built.pre; }
+    lineView.text.parentNode.replaceChild(built.pre, lineView.text);
+    lineView.text = built.pre;
+    if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
+      lineView.bgClass = built.bgClass;
+      lineView.textClass = built.textClass;
+      updateLineClasses(cm, lineView);
+    } else if (cls) {
+      lineView.text.className = cls;
+    }
+  }
+
+  function updateLineClasses(cm, lineView) {
+    updateLineBackground(cm, lineView);
+    if (lineView.line.wrapClass)
+      { ensureLineWrapped(lineView).className = lineView.line.wrapClass; }
+    else if (lineView.node != lineView.text)
+      { lineView.node.className = ""; }
+    var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass;
+    lineView.text.className = textClass || "";
+  }
+
+  function updateLineGutter(cm, lineView, lineN, dims) {
+    if (lineView.gutter) {
+      lineView.node.removeChild(lineView.gutter);
+      lineView.gutter = null;
+    }
+    if (lineView.gutterBackground) {
+      lineView.node.removeChild(lineView.gutterBackground);
+      lineView.gutterBackground = null;
+    }
+    if (lineView.line.gutterClass) {
+      var wrap = ensureLineWrapped(lineView);
+      lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
+                                      ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + (dims.gutterTotalWidth) + "px"));
+      cm.display.input.setUneditable(lineView.gutterBackground);
+      wrap.insertBefore(lineView.gutterBackground, lineView.text);
+    }
+    var markers = lineView.line.gutterMarkers;
+    if (cm.options.lineNumbers || markers) {
+      var wrap$1 = ensureLineWrapped(lineView);
+      var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"));
+      cm.display.input.setUneditable(gutterWrap);
+      wrap$1.insertBefore(gutterWrap, lineView.text);
+      if (lineView.line.gutterClass)
+        { gutterWrap.className += " " + lineView.line.gutterClass; }
+      if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
+        { lineView.lineNumber = gutterWrap.appendChild(
+          elt("div", lineNumberFor(cm.options, lineN),
+              "CodeMirror-linenumber CodeMirror-gutter-elt",
+              ("left: " + (dims.gutterLeft["CodeMirror-linenumbers"]) + "px; width: " + (cm.display.lineNumInnerWidth) + "px"))); }
+      if (markers) { for (var k = 0; k < cm.display.gutterSpecs.length; ++k) {
+        var id = cm.display.gutterSpecs[k].className, found = markers.hasOwnProperty(id) && markers[id];
+        if (found)
+          { gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
+                                     ("left: " + (dims.gutterLeft[id]) + "px; width: " + (dims.gutterWidth[id]) + "px"))); }
+      } }
+    }
+  }
+
+  function updateLineWidgets(cm, lineView, dims) {
+    if (lineView.alignable) { lineView.alignable = null; }
+    for (var node = lineView.node.firstChild, next = (void 0); node; node = next) {
+      next = node.nextSibling;
+      if (node.className == "CodeMirror-linewidget")
+        { lineView.node.removeChild(node); }
+    }
+    insertLineWidgets(cm, lineView, dims);
+  }
+
+  // Build a line's DOM representation from scratch
+  function buildLineElement(cm, lineView, lineN, dims) {
+    var built = getLineContent(cm, lineView);
+    lineView.text = lineView.node = built.pre;
+    if (built.bgClass) { lineView.bgClass = built.bgClass; }
+    if (built.textClass) { lineView.textClass = built.textClass; }
+
+    updateLineClasses(cm, lineView);
+    updateLineGutter(cm, lineView, lineN, dims);
+    insertLineWidgets(cm, lineView, dims);
+    return lineView.node
+  }
+
+  // A lineView may contain multiple logical lines (when merged by
+  // collapsed spans). The widgets for all of them need to be drawn.
+  function insertLineWidgets(cm, lineView, dims) {
+    insertLineWidgetsFor(cm, lineView.line, lineView, dims, true);
+    if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
+      { insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false); } }
+  }
+
+  function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
+    if (!line.widgets) { return }
+    var wrap = ensureLineWrapped(lineView);
+    for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
+      var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget");
+      if (!widget.handleMouseEvents) { node.setAttribute("cm-ignore-events", "true"); }
+      positionLineWidget(widget, node, lineView, dims);
+      cm.display.input.setUneditable(node);
+      if (allowAbove && widget.above)
+        { wrap.insertBefore(node, lineView.gutter || lineView.text); }
+      else
+        { wrap.appendChild(node); }
+      signalLater(widget, "redraw");
+    }
+  }
+
+  function positionLineWidget(widget, node, lineView, dims) {
+    if (widget.noHScroll) {
+  (lineView.alignable || (lineView.alignable = [])).push(node);
+      var width = dims.wrapperWidth;
+      node.style.left = dims.fixedPos + "px";
+      if (!widget.coverGutter) {
+        width -= dims.gutterTotalWidth;
+        node.style.paddingLeft = dims.gutterTotalWidth + "px";
+      }
+      node.style.width = width + "px";
+    }
+    if (widget.coverGutter) {
+      node.style.zIndex = 5;
+      node.style.position = "relative";
+      if (!widget.noHScroll) { node.style.marginLeft = -dims.gutterTotalWidth + "px"; }
+    }
+  }
+
+  function widgetHeight(widget) {
+    if (widget.height != null) { return widget.height }
+    var cm = widget.doc.cm;
+    if (!cm) { return 0 }
+    if (!contains(document.body, widget.node)) {
+      var parentStyle = "position: relative;";
+      if (widget.coverGutter)
+        { parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;"; }
+      if (widget.noHScroll)
+        { parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;"; }
+      removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle));
+    }
+    return widget.height = widget.node.parentNode.offsetHeight
+  }
+
+  // Return true when the given mouse event happened in a widget
+  function eventInWidget(display, e) {
+    for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
+      if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
+          (n.parentNode == display.sizer && n != display.mover))
+        { return true }
+    }
+  }
+
+  // POSITION MEASUREMENT
+
+  function paddingTop(display) {return display.lineSpace.offsetTop}
+  function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight}
+  function paddingH(display) {
+    if (display.cachedPaddingH) { return display.cachedPaddingH }
+    var e = removeChildrenAndAdd(display.measure, elt("pre", "x"));
+    var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle;
+    var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)};
+    if (!isNaN(data.left) && !isNaN(data.right)) { display.cachedPaddingH = data; }
+    return data
+  }
+
+  function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth }
+  function displayWidth(cm) {
+    return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth
+  }
+  function displayHeight(cm) {
+    return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight
+  }
+
+  // Ensure the lineView.wrapping.heights array is populated. This is
+  // an array of bottom offsets for the lines that make up a drawn
+  // line. When lineWrapping is on, there might be more than one
+  // height.
+  function ensureLineHeights(cm, lineView, rect) {
+    var wrapping = cm.options.lineWrapping;
+    var curWidth = wrapping && displayWidth(cm);
+    if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
+      var heights = lineView.measure.heights = [];
+      if (wrapping) {
+        lineView.measure.width = curWidth;
+        var rects = lineView.text.firstChild.getClientRects();
+        for (var i = 0; i < rects.length - 1; i++) {
+          var cur = rects[i], next = rects[i + 1];
+          if (Math.abs(cur.bottom - next.bottom) > 2)
+            { heights.push((cur.bottom + next.top) / 2 - rect.top); }
+        }
+      }
+      heights.push(rect.bottom - rect.top);
+    }
+  }
+
+  // Find a line map (mapping character offsets to text nodes) and a
+  // measurement cache for the given line number. (A line view might
+  // contain multiple lines when collapsed ranges are present.)
+  function mapFromLineView(lineView, line, lineN) {
+    if (lineView.line == line)
+      { return {map: lineView.measure.map, cache: lineView.measure.cache} }
+    for (var i = 0; i < lineView.rest.length; i++)
+      { if (lineView.rest[i] == line)
+        { return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]} } }
+    for (var i$1 = 0; i$1 < lineView.rest.length; i$1++)
+      { if (lineNo(lineView.rest[i$1]) > lineN)
+        { return {map: lineView.measure.maps[i$1], cache: lineView.measure.caches[i$1], before: true} } }
+  }
+
+  // Render a line into the hidden node display.externalMeasured. Used
+  // when measurement is needed for a line that's not in the viewport.
+  function updateExternalMeasurement(cm, line) {
+    line = visualLine(line);
+    var lineN = lineNo(line);
+    var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN);
+    view.lineN = lineN;
+    var built = view.built = buildLineContent(cm, view);
+    view.text = built.pre;
+    removeChildrenAndAdd(cm.display.lineMeasure, built.pre);
+    return view
+  }
+
+  // Get a {top, bottom, left, right} box (in line-local coordinates)
+  // for a given character.
+  function measureChar(cm, line, ch, bias) {
+    return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias)
+  }
+
+  // Find a line view that corresponds to the given line number.
+  function findViewForLine(cm, lineN) {
+    if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
+      { return cm.display.view[findViewIndex(cm, lineN)] }
+    var ext = cm.display.externalMeasured;
+    if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
+      { return ext }
+  }
+
+  // Measurement can be split in two steps, the set-up work that
+  // applies to the whole line, and the measurement of the actual
+  // character. Functions like coordsChar, that need to do a lot of
+  // measurements in a row, can thus ensure that the set-up work is
+  // only done once.
+  function prepareMeasureForLine(cm, line) {
+    var lineN = lineNo(line);
+    var view = findViewForLine(cm, lineN);
+    if (view && !view.text) {
+      view = null;
+    } else if (view && view.changes) {
+      updateLineForChanges(cm, view, lineN, getDimensions(cm));
+      cm.curOp.forceUpdate = true;
+    }
+    if (!view)
+      { view = updateExternalMeasurement(cm, line); }
+
+    var info = mapFromLineView(view, line, lineN);
+    return {
+      line: line, view: view, rect: null,
+      map: info.map, cache: info.cache, before: info.before,
+      hasHeights: false
+    }
+  }
+
+  // Given a prepared measurement object, measures the position of an
+  // actual character (or fetches it from the cache).
+  function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
+    if (prepared.before) { ch = -1; }
+    var key = ch + (bias || ""), found;
+    if (prepared.cache.hasOwnProperty(key)) {
+      found = prepared.cache[key];
+    } else {
+      if (!prepared.rect)
+        { prepared.rect = prepared.view.text.getBoundingClientRect(); }
+      if (!prepared.hasHeights) {
+        ensureLineHeights(cm, prepared.view, prepared.rect);
+        prepared.hasHeights = true;
+      }
+      found = measureCharInner(cm, prepared, ch, bias);
+      if (!found.bogus) { prepared.cache[key] = found; }
+    }
+    return {left: found.left, right: found.right,
+            top: varHeight ? found.rtop : found.top,
+            bottom: varHeight ? found.rbottom : found.bottom}
+  }
+
+  var nullRect = {left: 0, right: 0, top: 0, bottom: 0};
+
+  function nodeAndOffsetInLineMap(map$$1, ch, bias) {
+    var node, start, end, collapse, mStart, mEnd;
+    // First, search the line map for the text node corresponding to,
+    // or closest to, the target character.
+    for (var i = 0; i < map$$1.length; i += 3) {
+      mStart = map$$1[i];
+      mEnd = map$$1[i + 1];
+      if (ch < mStart) {
+        start = 0; end = 1;
+        collapse = "left";
+      } else if (ch < mEnd) {
+        start = ch - mStart;
+        end = start + 1;
+      } else if (i == map$$1.length - 3 || ch == mEnd && map$$1[i + 3] > ch) {
+        end = mEnd - mStart;
+        start = end - 1;
+        if (ch >= mEnd) { collapse = "right"; }
+      }
+      if (start != null) {
+        node = map$$1[i + 2];
+        if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
+          { collapse = bias; }
+        if (bias == "left" && start == 0)
+          { while (i && map$$1[i - 2] == map$$1[i - 3] && map$$1[i - 1].insertLeft) {
+            node = map$$1[(i -= 3) + 2];
+            collapse = "left";
+          } }
+        if (bias == "right" && start == mEnd - mStart)
+          { while (i < map$$1.length - 3 && map$$1[i + 3] == map$$1[i + 4] && !map$$1[i + 5].insertLeft) {
+            node = map$$1[(i += 3) + 2];
+            collapse = "right";
+          } }
+        break
+      }
+    }
+    return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}
+  }
+
+  function getUsefulRect(rects, bias) {
+    var rect = nullRect;
+    if (bias == "left") { for (var i = 0; i < rects.length; i++) {
+      if ((rect = rects[i]).left != rect.right) { break }
+    } } else { for (var i$1 = rects.length - 1; i$1 >= 0; i$1--) {
+      if ((rect = rects[i$1]).left != rect.right) { break }
+    } }
+    return rect
+  }
+
+  function measureCharInner(cm, prepared, ch, bias) {
+    var place = nodeAndOffsetInLineMap(prepared.map, ch, bias);
+    var node = place.node, start = place.start, end = place.end, collapse = place.collapse;
+
+    var rect;
+    if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
+      for (var i$1 = 0; i$1 < 4; i$1++) { // Retry a maximum of 4 times when nonsense rectangles are returned
+        while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) { --start; }
+        while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) { ++end; }
+        if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart)
+          { rect = node.parentNode.getBoundingClientRect(); }
+        else
+          { rect = getUsefulRect(range(node, start, end).getClientRects(), bias); }
+        if (rect.left || rect.right || start == 0) { break }
+        end = start;
+        start = start - 1;
+        collapse = "right";
+      }
+      if (ie && ie_version < 11) { rect = maybeUpdateRectForZooming(cm.display.measure, rect); }
+    } else { // If it is a widget, simply get the box for the whole widget.
+      if (start > 0) { collapse = bias = "right"; }
+      var rects;
+      if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
+        { rect = rects[bias == "right" ? rects.length - 1 : 0]; }
+      else
+        { rect = node.getBoundingClientRect(); }
+    }
+    if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
+      var rSpan = node.parentNode.getClientRects()[0];
+      if (rSpan)
+        { rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom}; }
+      else
+        { rect = nullRect; }
+    }
+
+    var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top;
+    var mid = (rtop + rbot) / 2;
+    var heights = prepared.view.measure.heights;
+    var i = 0;
+    for (; i < heights.length - 1; i++)
+      { if (mid < heights[i]) { break } }
+    var top = i ? heights[i - 1] : 0, bot = heights[i];
+    var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
+                  right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
+                  top: top, bottom: bot};
+    if (!rect.left && !rect.right) { result.bogus = true; }
+    if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot; }
+
+    return result
+  }
+
+  // Work around problem with bounding client rects on ranges being
+  // returned incorrectly when zoomed on IE10 and below.
+  function maybeUpdateRectForZooming(measure, rect) {
+    if (!window.screen || screen.logicalXDPI == null ||
+        screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
+      { return rect }
+    var scaleX = screen.logicalXDPI / screen.deviceXDPI;
+    var scaleY = screen.logicalYDPI / screen.deviceYDPI;
+    return {left: rect.left * scaleX, right: rect.right * scaleX,
+            top: rect.top * scaleY, bottom: rect.bottom * scaleY}
+  }
+
+  function clearLineMeasurementCacheFor(lineView) {
+    if (lineView.measure) {
+      lineView.measure.cache = {};
+      lineView.measure.heights = null;
+      if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
+        { lineView.measure.caches[i] = {}; } }
+    }
+  }
+
+  function clearLineMeasurementCache(cm) {
+    cm.display.externalMeasure = null;
+    removeChildren(cm.display.lineMeasure);
+    for (var i = 0; i < cm.display.view.length; i++)
+      { clearLineMeasurementCacheFor(cm.display.view[i]); }
+  }
+
+  function clearCaches(cm) {
+    clearLineMeasurementCache(cm);
+    cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null;
+    if (!cm.options.lineWrapping) { cm.display.maxLineChanged = true; }
+    cm.display.lineNumChars = null;
+  }
+
+  function pageScrollX() {
+    // Work around https://bugs.chromium.org/p/chromium/issues/detail?id=489206
+    // which causes page_Offset and bounding client rects to use
+    // different reference viewports and invalidate our calculations.
+    if (chrome && android) { return -(document.body.getBoundingClientRect().left - parseInt(getComputedStyle(document.body).marginLeft)) }
+    return window.pageXOffset || (document.documentElement || document.body).scrollLeft
+  }
+  function pageScrollY() {
+    if (chrome && android) { return -(document.body.getBoundingClientRect().top - parseInt(getComputedStyle(document.body).marginTop)) }
+    return window.pageYOffset || (document.documentElement || document.body).scrollTop
+  }
+
+  function widgetTopHeight(lineObj) {
+    var height = 0;
+    if (lineObj.widgets) { for (var i = 0; i < lineObj.widgets.length; ++i) { if (lineObj.widgets[i].above)
+      { height += widgetHeight(lineObj.widgets[i]); } } }
+    return height
+  }
+
+  // Converts a {top, bottom, left, right} box from line-local
+  // coordinates into another coordinate system. Context may be one of
+  // "line", "div" (display.lineDiv), "local"./null (editor), "window",
+  // or "page".
+  function intoCoordSystem(cm, lineObj, rect, context, includeWidgets) {
+    if (!includeWidgets) {
+      var height = widgetTopHeight(lineObj);
+      rect.top += height; rect.bottom += height;
+    }
+    if (context == "line") { return rect }
+    if (!context) { context = "local"; }
+    var yOff = heightAtLine(lineObj);
+    if (context == "local") { yOff += paddingTop(cm.display); }
+    else { yOff -= cm.display.viewOffset; }
+    if (context == "page" || context == "window") {
+      var lOff = cm.display.lineSpace.getBoundingClientRect();
+      yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
+      var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
+      rect.left += xOff; rect.right += xOff;
+    }
+    rect.top += yOff; rect.bottom += yOff;
+    return rect
+  }
+
+  // Coverts a box from "div" coords to another coordinate system.
+  // Context may be "window", "page", "div", or "local"./null.
+  function fromCoordSystem(cm, coords, context) {
+    if (context == "div") { return coords }
+    var left = coords.left, top = coords.top;
+    // First move into "page" coordinate system
+    if (context == "page") {
+      left -= pageScrollX();
+      top -= pageScrollY();
+    } else if (context == "local" || !context) {
+      var localBox = cm.display.sizer.getBoundingClientRect();
+      left += localBox.left;
+      top += localBox.top;
+    }
+
+    var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
+    return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}
+  }
+
+  function charCoords(cm, pos, context, lineObj, bias) {
+    if (!lineObj) { lineObj = getLine(cm.doc, pos.line); }
+    return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context)
+  }
+
+  // Returns a box for a given cursor position, which may have an
+  // 'other' property containing the position of the secondary cursor
+  // on a bidi boundary.
+  // A cursor Pos(line, char, "before") is on the same visual line as `char - 1`
+  // and after `char - 1` in writing order of `char - 1`
+  // A cursor Pos(line, char, "after") is on the same visual line as `char`
+  // and before `char` in writing order of `char`
+  // Examples (upper-case letters are RTL, lower-case are LTR):
+  //     Pos(0, 1, ...)
+  //     before   after
+  // ab     a|b     a|b
+  // aB     a|B     aB|
+  // Ab     |Ab     A|b
+  // AB     B|A     B|A
+  // Every position after the last character on a line is considered to stick
+  // to the last character on the line.
+  function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
+    lineObj = lineObj || getLine(cm.doc, pos.line);
+    if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
+    function get(ch, right) {
+      var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight);
+      if (right) { m.left = m.right; } else { m.right = m.left; }
+      return intoCoordSystem(cm, lineObj, m, context)
+    }
+    var order = getOrder(lineObj, cm.doc.direction), ch = pos.ch, sticky = pos.sticky;
+    if (ch >= lineObj.text.length) {
+      ch = lineObj.text.length;
+      sticky = "before";
+    } else if (ch <= 0) {
+      ch = 0;
+      sticky = "after";
+    }
+    if (!order) { return get(sticky == "before" ? ch - 1 : ch, sticky == "before") }
+
+    function getBidi(ch, partPos, invert) {
+      var part = order[partPos], right = part.level == 1;
+      return get(invert ? ch - 1 : ch, right != invert)
+    }
+    var partPos = getBidiPartAt(order, ch, sticky);
+    var other = bidiOther;
+    var val = getBidi(ch, partPos, sticky == "before");
+    if (other != null) { val.other = getBidi(ch, other, sticky != "before"); }
+    return val
+  }
+
+  // Used to cheaply estimate the coordinates for a position. Used for
+  // intermediate scroll updates.
+  function estimateCoords(cm, pos) {
+    var left = 0;
+    pos = clipPos(cm.doc, pos);
+    if (!cm.options.lineWrapping) { left = charWidth(cm.display) * pos.ch; }
+    var lineObj = getLine(cm.doc, pos.line);
+    var top = heightAtLine(lineObj) + paddingTop(cm.display);
+    return {left: left, right: left, top: top, bottom: top + lineObj.height}
+  }
+
+  // Positions returned by coordsChar contain some extra information.
+  // xRel is the relative x position of the input coordinates compared
+  // to the found position (so xRel > 0 means the coordinates are to
+  // the right of the character position, for example). When outside
+  // is true, that means the coordinates lie outside the line's
+  // vertical range.
+  function PosWithInfo(line, ch, sticky, outside, xRel) {
+    var pos = Pos(line, ch, sticky);
+    pos.xRel = xRel;
+    if (outside) { pos.outside = true; }
+    return pos
+  }
+
+  // Compute the character position closest to the given coordinates.
+  // Input must be lineSpace-local ("div" coordinate system).
+  function coordsChar(cm, x, y) {
+    var doc = cm.doc;
+    y += cm.display.viewOffset;
+    if (y < 0) { return PosWithInfo(doc.first, 0, null, true, -1) }
+    var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
+    if (lineN > last)
+      { return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, null, true, 1) }
+    if (x < 0) { x = 0; }
+
+    var lineObj = getLine(doc, lineN);
+    for (;;) {
+      var found = coordsCharInner(cm, lineObj, lineN, x, y);
+      var collapsed = collapsedSpanAround(lineObj, found.ch + (found.xRel > 0 ? 1 : 0));
+      if (!collapsed) { return found }
+      var rangeEnd = collapsed.find(1);
+      if (rangeEnd.line == lineN) { return rangeEnd }
+      lineObj = getLine(doc, lineN = rangeEnd.line);
+    }
+  }
+
+  function wrappedLineExtent(cm, lineObj, preparedMeasure, y) {
+    y -= widgetTopHeight(lineObj);
+    var end = lineObj.text.length;
+    var begin = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch - 1).bottom <= y; }, end, 0);
+    end = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch).top > y; }, begin, end);
+    return {begin: begin, end: end}
+  }
+
+  function wrappedLineExtentChar(cm, lineObj, preparedMeasure, target) {
+    if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
+    var targetTop = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, target), "line").top;
+    return wrappedLineExtent(cm, lineObj, preparedMeasure, targetTop)
+  }
+
+  // Returns true if the given side of a box is after the given
+  // coordinates, in top-to-bottom, left-to-right order.
+  function boxIsAfter(box, x, y, left) {
+    return box.bottom <= y ? false : box.top > y ? true : (left ? box.left : box.right) > x
+  }
+
+  function coordsCharInner(cm, lineObj, lineNo$$1, x, y) {
+    // Move y into line-local coordinate space
+    y -= heightAtLine(lineObj);
+    var preparedMeasure = prepareMeasureForLine(cm, lineObj);
+    // When directly calling `measureCharPrepared`, we have to adjust
+    // for the widgets at this line.
+    var widgetHeight$$1 = widgetTopHeight(lineObj);
+    var begin = 0, end = lineObj.text.length, ltr = true;
+
+    var order = getOrder(lineObj, cm.doc.direction);
+    // If the line isn't plain left-to-right text, first figure out
+    // which bidi section the coordinates fall into.
+    if (order) {
+      var part = (cm.options.lineWrapping ? coordsBidiPartWrapped : coordsBidiPart)
+                   (cm, lineObj, lineNo$$1, preparedMeasure, order, x, y);
+      ltr = part.level != 1;
+      // The awkward -1 offsets are needed because findFirst (called
+      // on these below) will treat its first bound as inclusive,
+      // second as exclusive, but we want to actually address the
+      // characters in the part's range
+      begin = ltr ? part.from : part.to - 1;
+      end = ltr ? part.to : part.from - 1;
+    }
+
+    // A binary search to find the first character whose bounding box
+    // starts after the coordinates. If we run across any whose box wrap
+    // the coordinates, store that.
+    var chAround = null, boxAround = null;
+    var ch = findFirst(function (ch) {
+      var box = measureCharPrepared(cm, preparedMeasure, ch);
+      box.top += widgetHeight$$1; box.bottom += widgetHeight$$1;
+      if (!boxIsAfter(box, x, y, false)) { return false }
+      if (box.top <= y && box.left <= x) {
+        chAround = ch;
+        boxAround = box;
+      }
+      return true
+    }, begin, end);
+
+    var baseX, sticky, outside = false;
+    // If a box around the coordinates was found, use that
+    if (boxAround) {
+      // Distinguish coordinates nearer to the left or right side of the box
+      var atLeft = x - boxAround.left < boxAround.right - x, atStart = atLeft == ltr;
+      ch = chAround + (atStart ? 0 : 1);
+      sticky = atStart ? "after" : "before";
+      baseX = atLeft ? boxAround.left : boxAround.right;
+    } else {
+      // (Adjust for extended bound, if necessary.)
+      if (!ltr && (ch == end || ch == begin)) { ch++; }
+      // To determine which side to associate with, get the box to the
+      // left of the character and compare it's vertical position to the
+      // coordinates
+      sticky = ch == 0 ? "after" : ch == lineObj.text.length ? "before" :
+        (measureCharPrepared(cm, preparedMeasure, ch - (ltr ? 1 : 0)).bottom + widgetHeight$$1 <= y) == ltr ?
+        "after" : "before";
+      // Now get accurate coordinates for this place, in order to get a
+      // base X position
+      var coords = cursorCoords(cm, Pos(lineNo$$1, ch, sticky), "line", lineObj, preparedMeasure);
+      baseX = coords.left;
+      outside = y < coords.top || y >= coords.bottom;
+    }
+
+    ch = skipExtendingChars(lineObj.text, ch, 1);
+    return PosWithInfo(lineNo$$1, ch, sticky, outside, x - baseX)
+  }
+
+  function coordsBidiPart(cm, lineObj, lineNo$$1, preparedMeasure, order, x, y) {
+    // Bidi parts are sorted left-to-right, and in a non-line-wrapping
+    // situation, we can take this ordering to correspond to the visual
+    // ordering. This finds the first part whose end is after the given
+    // coordinates.
+    var index = findFirst(function (i) {
+      var part = order[i], ltr = part.level != 1;
+      return boxIsAfter(cursorCoords(cm, Pos(lineNo$$1, ltr ? part.to : part.from, ltr ? "before" : "after"),
+                                     "line", lineObj, preparedMeasure), x, y, true)
+    }, 0, order.length - 1);
+    var part = order[index];
+    // If this isn't the first part, the part's start is also after
+    // the coordinates, and the coordinates aren't on the same line as
+    // that start, move one part back.
+    if (index > 0) {
+      var ltr = part.level != 1;
+      var start = cursorCoords(cm, Pos(lineNo$$1, ltr ? part.from : part.to, ltr ? "after" : "before"),
+                               "line", lineObj, preparedMeasure);
+      if (boxIsAfter(start, x, y, true) && start.top > y)
+        { part = order[index - 1]; }
+    }
+    return part
+  }
+
+  function coordsBidiPartWrapped(cm, lineObj, _lineNo, preparedMeasure, order, x, y) {
+    // In a wrapped line, rtl text on wrapping boundaries can do things
+    // that don't correspond to the ordering in our `order` array at
+    // all, so a binary search doesn't work, and we want to return a
+    // part that only spans one line so that the binary search in
+    // coordsCharInner is safe. As such, we first find the extent of the
+    // wrapped line, and then do a flat search in which we discard any
+    // spans that aren't on the line.
+    var ref = wrappedLineExtent(cm, lineObj, preparedMeasure, y);
+    var begin = ref.begin;
+    var end = ref.end;
+    if (/\s/.test(lineObj.text.charAt(end - 1))) { end--; }
+    var part = null, closestDist = null;
+    for (var i = 0; i < order.length; i++) {
+      var p = order[i];
+      if (p.from >= end || p.to <= begin) { continue }
+      var ltr = p.level != 1;
+      var endX = measureCharPrepared(cm, preparedMeasure, ltr ? Math.min(end, p.to) - 1 : Math.max(begin, p.from)).right;
+      // Weigh against spans ending before this, so that they are only
+      // picked if nothing ends after
+      var dist = endX < x ? x - endX + 1e9 : endX - x;
+      if (!part || closestDist > dist) {
+        part = p;
+        closestDist = dist;
+      }
+    }
+    if (!part) { part = order[order.length - 1]; }
+    // Clip the part to the wrapped line.
+    if (part.from < begin) { part = {from: begin, to: part.to, level: part.level}; }
+    if (part.to > end) { part = {from: part.from, to: end, level: part.level}; }
+    return part
+  }
+
+  var measureText;
+  // Compute the default text height.
+  function textHeight(display) {
+    if (display.cachedTextHeight != null) { return display.cachedTextHeight }
+    if (measureText == null) {
+      measureText = elt("pre");
+      // Measure a bunch of lines, for browsers that compute
+      // fractional heights.
+      for (var i = 0; i < 49; ++i) {
+        measureText.appendChild(document.createTextNode("x"));
+        measureText.appendChild(elt("br"));
+      }
+      measureText.appendChild(document.createTextNode("x"));
+    }
+    removeChildrenAndAdd(display.measure, measureText);
+    var height = measureText.offsetHeight / 50;
+    if (height > 3) { display.cachedTextHeight = height; }
+    removeChildren(display.measure);
+    return height || 1
+  }
+
+  // Compute the default character width.
+  function charWidth(display) {
+    if (display.cachedCharWidth != null) { return display.cachedCharWidth }
+    var anchor = elt("span", "xxxxxxxxxx");
+    var pre = elt("pre", [anchor]);
+    removeChildrenAndAdd(display.measure, pre);
+    var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10;
+    if (width > 2) { display.cachedCharWidth = width; }
+    return width || 10
+  }
+
+  // Do a bulk-read of the DOM positions and sizes needed to draw the
+  // view, so that we don't interleave reading and writing to the DOM.
+  function getDimensions(cm) {
+    var d = cm.display, left = {}, width = {};
+    var gutterLeft = d.gutters.clientLeft;
+    for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
+      var id = cm.display.gutterSpecs[i].className;
+      left[id] = n.offsetLeft + n.clientLeft + gutterLeft;
+      width[id] = n.clientWidth;
+    }
+    return {fixedPos: compensateForHScroll(d),
+            gutterTotalWidth: d.gutters.offsetWidth,
+            gutterLeft: left,
+            gutterWidth: width,
+            wrapperWidth: d.wrapper.clientWidth}
+  }
+
+  // Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
+  // but using getBoundingClientRect to get a sub-pixel-accurate
+  // result.
+  function compensateForHScroll(display) {
+    return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left
+  }
+
+  // Returns a function that estimates the height of a line, to use as
+  // first approximation until the line becomes visible (and is thus
+  // properly measurable).
+  function estimateHeight(cm) {
+    var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
+    var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
+    return function (line) {
+      if (lineIsHidden(cm.doc, line)) { return 0 }
+
+      var widgetsHeight = 0;
+      if (line.widgets) { for (var i = 0; i < line.widgets.length; i++) {
+        if (line.widgets[i].height) { widgetsHeight += line.widgets[i].height; }
+      } }
+
+      if (wrapping)
+        { return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th }
+      else
+        { return widgetsHeight + th }
+    }
+  }
+
+  function estimateLineHeights(cm) {
+    var doc = cm.doc, est = estimateHeight(cm);
+    doc.iter(function (line) {
+      var estHeight = est(line);
+      if (estHeight != line.height) { updateLineHeight(line, estHeight); }
+    });
+  }
+
+  // Given a mouse event, find the corresponding position. If liberal
+  // is false, it checks whether a gutter or scrollbar was clicked,
+  // and returns null if it was. forRect is used by rectangular
+  // selections, and tries to estimate a character position even for
+  // coordinates beyond the right of the text.
+  function posFromMouse(cm, e, liberal, forRect) {
+    var display = cm.display;
+    if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") { return null }
+
+    var x, y, space = display.lineSpace.getBoundingClientRect();
+    // Fails unpredictably on IE[67] when mouse is dragged around quickly.
+    try { x = e.clientX - space.left; y = e.clientY - space.top; }
+    catch (e) { return null }
+    var coords = coordsChar(cm, x, y), line;
+    if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
+      var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length;
+      coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff));
+    }
+    return coords
+  }
+
+  // Find the view element corresponding to a given line. Return null
+  // when the line isn't visible.
+  function findViewIndex(cm, n) {
+    if (n >= cm.display.viewTo) { return null }
+    n -= cm.display.viewFrom;
+    if (n < 0) { return null }
+    var view = cm.display.view;
+    for (var i = 0; i < view.length; i++) {
+      n -= view[i].size;
+      if (n < 0) { return i }
+    }
+  }
+
+  // Updates the display.view data structure for a given change to the
+  // document. From and to are in pre-change coordinates. Lendiff is
+  // the amount of lines added or subtracted by the change. This is
+  // used for changes that span multiple lines, or change the way
+  // lines are divided into visual lines. regLineChange (below)
+  // registers single-line changes.
+  function regChange(cm, from, to, lendiff) {
+    if (from == null) { from = cm.doc.first; }
+    if (to == null) { to = cm.doc.first + cm.doc.size; }
+    if (!lendiff) { lendiff = 0; }
+
+    var display = cm.display;
+    if (lendiff && to < display.viewTo &&
+        (display.updateLineNumbers == null || display.updateLineNumbers > from))
+      { display.updateLineNumbers = from; }
+
+    cm.curOp.viewChanged = true;
+
+    if (from >= display.viewTo) { // Change after
+      if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
+        { resetView(cm); }
+    } else if (to <= display.viewFrom) { // Change before
+      if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
+        resetView(cm);
+      } else {
+        display.viewFrom += lendiff;
+        display.viewTo += lendiff;
+      }
+    } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
+      resetView(cm);
+    } else if (from <= display.viewFrom) { // Top overlap
+      var cut = viewCuttingPoint(cm, to, to + lendiff, 1);
+      if (cut) {
+        display.view = display.view.slice(cut.index);
+        display.viewFrom = cut.lineN;
+        display.viewTo += lendiff;
+      } else {
+        resetView(cm);
+      }
+    } else if (to >= display.viewTo) { // Bottom overlap
+      var cut$1 = viewCuttingPoint(cm, from, from, -1);
+      if (cut$1) {
+        display.view = display.view.slice(0, cut$1.index);
+        display.viewTo = cut$1.lineN;
+      } else {
+        resetView(cm);
+      }
+    } else { // Gap in the middle
+      var cutTop = viewCuttingPoint(cm, from, from, -1);
+      var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1);
+      if (cutTop && cutBot) {
+        display.view = display.view.slice(0, cutTop.index)
+          .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
+          .concat(display.view.slice(cutBot.index));
+        display.viewTo += lendiff;
+      } else {
+        resetView(cm);
+      }
+    }
+
+    var ext = display.externalMeasured;
+    if (ext) {
+      if (to < ext.lineN)
+        { ext.lineN += lendiff; }
+      else if (from < ext.lineN + ext.size)
+        { display.externalMeasured = null; }
+    }
+  }
+
+  // Register a change to a single line. Type must be one of "text",
+  // "gutter", "class", "widget"
+  function regLineChange(cm, line, type) {
+    cm.curOp.viewChanged = true;
+    var display = cm.display, ext = cm.display.externalMeasured;
+    if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
+      { display.externalMeasured = null; }
+
+    if (line < display.viewFrom || line >= display.viewTo) { return }
+    var lineView = display.view[findViewIndex(cm, line)];
+    if (lineView.node == null) { return }
+    var arr = lineView.changes || (lineView.changes = []);
+    if (indexOf(arr, type) == -1) { arr.push(type); }
+  }
+
+  // Clear the view.
+  function resetView(cm) {
+    cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
+    cm.display.view = [];
+    cm.display.viewOffset = 0;
+  }
+
+  function viewCuttingPoint(cm, oldN, newN, dir) {
+    var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
+    if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
+      { return {index: index, lineN: newN} }
+    var n = cm.display.viewFrom;
+    for (var i = 0; i < index; i++)
+      { n += view[i].size; }
+    if (n != oldN) {
+      if (dir > 0) {
+        if (index == view.length - 1) { return null }
+        diff = (n + view[index].size) - oldN;
+        index++;
+      } else {
+        diff = n - oldN;
+      }
+      oldN += diff; newN += diff;
+    }
+    while (visualLineNo(cm.doc, newN) != newN) {
+      if (index == (dir < 0 ? 0 : view.length - 1)) { return null }
+      newN += dir * view[index - (dir < 0 ? 1 : 0)].size;
+      index += dir;
+    }
+    return {index: index, lineN: newN}
+  }
+
+  // Force the view to cover a given range, adding empty view element
+  // or clipping off existing ones as needed.
+  function adjustView(cm, from, to) {
+    var display = cm.display, view = display.view;
+    if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
+      display.view = buildViewArray(cm, from, to);
+      display.viewFrom = from;
+    } else {
+      if (display.viewFrom > from)
+        { display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view); }
+      else if (display.viewFrom < from)
+        { display.view = display.view.slice(findViewIndex(cm, from)); }
+      display.viewFrom = from;
+      if (display.viewTo < to)
+        { display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)); }
+      else if (display.viewTo > to)
+        { display.view = display.view.slice(0, findViewIndex(cm, to)); }
+    }
+    display.viewTo = to;
+  }
+
+  // Count the number of lines in the view whose DOM representation is
+  // out of date (or nonexistent).
+  function countDirtyView(cm) {
+    var view = cm.display.view, dirty = 0;
+    for (var i = 0; i < view.length; i++) {
+      var lineView = view[i];
+      if (!lineView.hidden && (!lineView.node || lineView.changes)) { ++dirty; }
+    }
+    return dirty
+  }
+
+  function updateSelection(cm) {
+    cm.display.input.showSelection(cm.display.input.prepareSelection());
+  }
+
+  function prepareSelection(cm, primary) {
+    if ( primary === void 0 ) primary = true;
+
+    var doc = cm.doc, result = {};
+    var curFragment = result.cursors = document.createDocumentFragment();
+    var selFragment = result.selection = document.createDocumentFragment();
+
+    for (var i = 0; i < doc.sel.ranges.length; i++) {
+      if (!primary && i == doc.sel.primIndex) { continue }
+      var range$$1 = doc.sel.ranges[i];
+      if (range$$1.from().line >= cm.display.viewTo || range$$1.to().line < cm.display.viewFrom) { continue }
+      var collapsed = range$$1.empty();
+      if (collapsed || cm.options.showCursorWhenSelecting)
+        { drawSelectionCursor(cm, range$$1.head, curFragment); }
+      if (!collapsed)
+        { drawSelectionRange(cm, range$$1, selFragment); }
+    }
+    return result
+  }
+
+  // Draws a cursor for the given range
+  function drawSelectionCursor(cm, head, output) {
+    var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine);
+
+    var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
+    cursor.style.left = pos.left + "px";
+    cursor.style.top = pos.top + "px";
+    cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";
+
+    if (pos.other) {
+      // Secondary cursor, shown when on a 'jump' in bi-directional text
+      var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"));
+      otherCursor.style.display = "";
+      otherCursor.style.left = pos.other.left + "px";
+      otherCursor.style.top = pos.other.top + "px";
+      otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
+    }
+  }
+
+  function cmpCoords(a, b) { return a.top - b.top || a.left - b.left }
+
+  // Draws the given range as a highlighted selection
+  function drawSelectionRange(cm, range$$1, output) {
+    var display = cm.display, doc = cm.doc;
+    var fragment = document.createDocumentFragment();
+    var padding = paddingH(cm.display), leftSide = padding.left;
+    var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right;
+    var docLTR = doc.direction == "ltr";
+
+    function add(left, top, width, bottom) {
+      if (top < 0) { top = 0; }
+      top = Math.round(top);
+      bottom = Math.round(bottom);
+      fragment.appendChild(elt("div", null, "CodeMirror-selected", ("position: absolute; left: " + left + "px;\n                             top: " + top + "px; width: " + (width == null ? rightSide - left : width) + "px;\n                             height: " + (bottom - top) + "px")));
+    }
+
+    function drawForLine(line, fromArg, toArg) {
+      var lineObj = getLine(doc, line);
+      var lineLen = lineObj.text.length;
+      var start, end;
+      function coords(ch, bias) {
+        return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
+      }
+
+      function wrapX(pos, dir, side) {
+        var extent = wrappedLineExtentChar(cm, lineObj, null, pos);
+        var prop = (dir == "ltr") == (side == "after") ? "left" : "right";
+        var ch = side == "after" ? extent.begin : extent.end - (/\s/.test(lineObj.text.charAt(extent.end - 1)) ? 2 : 1);
+        return coords(ch, prop)[prop]
+      }
+
+      var order = getOrder(lineObj, doc.direction);
+      iterateBidiSections(order, fromArg || 0, toArg == null ? lineLen : toArg, function (from, to, dir, i) {
+        var ltr = dir == "ltr";
+        var fromPos = coords(from, ltr ? "left" : "right");
+        var toPos = coords(to - 1, ltr ? "right" : "left");
+
+        var openStart = fromArg == null && from == 0, openEnd = toArg == null && to == lineLen;
+        var first = i == 0, last = !order || i == order.length - 1;
+        if (toPos.top - fromPos.top <= 3) { // Single line
+          var openLeft = (docLTR ? openStart : openEnd) && first;
+          var openRight = (docLTR ? openEnd : openStart) && last;
+          var left = openLeft ? leftSide : (ltr ? fromPos : toPos).left;
+          var right = openRight ? rightSide : (ltr ? toPos : fromPos).right;
+          add(left, fromPos.top, right - left, fromPos.bottom);
+        } else { // Multiple lines
+          var topLeft, topRight, botLeft, botRight;
+          if (ltr) {
+            topLeft = docLTR && openStart && first ? leftSide : fromPos.left;
+            topRight = docLTR ? rightSide : wrapX(from, dir, "before");
+            botLeft = docLTR ? leftSide : wrapX(to, dir, "after");
+            botRight = docLTR && openEnd && last ? rightSide : toPos.right;
+          } else {
+            topLeft = !docLTR ? leftSide : wrapX(from, dir, "before");
+            topRight = !docLTR && openStart && first ? rightSide : fromPos.right;
+            botLeft = !docLTR && openEnd && last ? leftSide : toPos.left;
+            botRight = !docLTR ? rightSide : wrapX(to, dir, "after");
+          }
+          add(topLeft, fromPos.top, topRight - topLeft, fromPos.bottom);
+          if (fromPos.bottom < toPos.top) { add(leftSide, fromPos.bottom, null, toPos.top); }
+          add(botLeft, toPos.top, botRight - botLeft, toPos.bottom);
+        }
+
+        if (!start || cmpCoords(fromPos, start) < 0) { start = fromPos; }
+        if (cmpCoords(toPos, start) < 0) { start = toPos; }
+        if (!end || cmpCoords(fromPos, end) < 0) { end = fromPos; }
+        if (cmpCoords(toPos, end) < 0) { end = toPos; }
+      });
+      return {start: start, end: end}
+    }
+
+    var sFrom = range$$1.from(), sTo = range$$1.to();
+    if (sFrom.line == sTo.line) {
+      drawForLine(sFrom.line, sFrom.ch, sTo.ch);
+    } else {
+      var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line);
+      var singleVLine = visualLine(fromLine) == visualLine(toLine);
+      var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end;
+      var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start;
+      if (singleVLine) {
+        if (leftEnd.top < rightStart.top - 2) {
+          add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
+          add(leftSide, rightStart.top, rightStart.left, rightStart.bottom);
+        } else {
+          add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);
+        }
+      }
+      if (leftEnd.bottom < rightStart.top)
+        { add(leftSide, leftEnd.bottom, null, rightStart.top); }
+    }
+
+    output.appendChild(fragment);
+  }
+
+  // Cursor-blinking
+  function restartBlink(cm) {
+    if (!cm.state.focused) { return }
+    var display = cm.display;
+    clearInterval(display.blinker);
+    var on = true;
+    display.cursorDiv.style.visibility = "";
+    if (cm.options.cursorBlinkRate > 0)
+      { display.blinker = setInterval(function () { return display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"; },
+        cm.options.cursorBlinkRate); }
+    else if (cm.options.cursorBlinkRate < 0)
+      { display.cursorDiv.style.visibility = "hidden"; }
+  }
+
+  function ensureFocus(cm) {
+    if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm); }
+  }
+
+  function delayBlurEvent(cm) {
+    cm.state.delayingBlurEvent = true;
+    setTimeout(function () { if (cm.state.delayingBlurEvent) {
+      cm.state.delayingBlurEvent = false;
+      onBlur(cm);
+    } }, 100);
+  }
+
+  function onFocus(cm, e) {
+    if (cm.state.delayingBlurEvent) { cm.state.delayingBlurEvent = false; }
+
+    if (cm.options.readOnly == "nocursor") { return }
+    if (!cm.state.focused) {
+      signal(cm, "focus", cm, e);
+      cm.state.focused = true;
+      addClass(cm.display.wrapper, "CodeMirror-focused");
+      // This test prevents this from firing when a context
+      // menu is closed (since the input reset would kill the
+      // select-all detection hack)
+      if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
+        cm.display.input.reset();
+        if (webkit) { setTimeout(function () { return cm.display.input.reset(true); }, 20); } // Issue #1730
+      }
+      cm.display.input.receivedFocus();
+    }
+    restartBlink(cm);
+  }
+  function onBlur(cm, e) {
+    if (cm.state.delayingBlurEvent) { return }
+
+    if (cm.state.focused) {
+      signal(cm, "blur", cm, e);
+      cm.state.focused = false;
+      rmClass(cm.display.wrapper, "CodeMirror-focused");
+    }
+    clearInterval(cm.display.blinker);
+    setTimeout(function () { if (!cm.state.focused) { cm.display.shift = false; } }, 150);
+  }
+
+  // Read the actual heights of the rendered lines, and update their
+  // stored heights to match.
+  function updateHeightsInViewport(cm) {
+    var display = cm.display;
+    var prevBottom = display.lineDiv.offsetTop;
+    for (var i = 0; i < display.view.length; i++) {
+      var cur = display.view[i], wrapping = cm.options.lineWrapping;
+      var height = (void 0), width = 0;
+      if (cur.hidden) { continue }
+      if (ie && ie_version < 8) {
+        var bot = cur.node.offsetTop + cur.node.offsetHeight;
+        height = bot - prevBottom;
+        prevBottom = bot;
+      } else {
+        var box = cur.node.getBoundingClientRect();
+        height = box.bottom - box.top;
+        // Check that lines don't extend past the right of the current
+        // editor width
+        if (!wrapping && cur.text.firstChild)
+          { width = cur.text.firstChild.getBoundingClientRect().right - box.left - 1; }
+      }
+      var diff = cur.line.height - height;
+      if (diff > .005 || diff < -.005) {
+        updateLineHeight(cur.line, height);
+        updateWidgetHeight(cur.line);
+        if (cur.rest) { for (var j = 0; j < cur.rest.length; j++)
+          { updateWidgetHeight(cur.rest[j]); } }
+      }
+      if (width > cm.display.sizerWidth) {
+        var chWidth = Math.ceil(width / charWidth(cm.display));
+        if (chWidth > cm.display.maxLineLength) {
+          cm.display.maxLineLength = chWidth;
+          cm.display.maxLine = cur.line;
+          cm.display.maxLineChanged = true;
+        }
+      }
+    }
+  }
+
+  // Read and store the height of line widgets associated with the
+  // given line.
+  function updateWidgetHeight(line) {
+    if (line.widgets) { for (var i = 0; i < line.widgets.length; ++i) {
+      var w = line.widgets[i], parent = w.node.parentNode;
+      if (parent) { w.height = parent.offsetHeight; }
+    } }
+  }
+
+  // Compute the lines that are visible in a given viewport (defaults
+  // the the current scroll position). viewport may contain top,
+  // height, and ensure (see op.scrollToPos) properties.
+  function visibleLines(display, doc, viewport) {
+    var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop;
+    top = Math.floor(top - paddingTop(display));
+    var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight;
+
+    var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom);
+    // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
+    // forces those lines into the viewport (if possible).
+    if (viewport && viewport.ensure) {
+      var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line;
+      if (ensureFrom < from) {
+        from = ensureFrom;
+        to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight);
+      } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
+        from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight);
+        to = ensureTo;
+      }
+    }
+    return {from: from, to: Math.max(to, from + 1)}
+  }
+
+  // SCROLLING THINGS INTO VIEW
+
+  // If an editor sits on the top or bottom of the window, partially
+  // scrolled out of view, this ensures that the cursor is visible.
+  function maybeScrollWindow(cm, rect) {
+    if (signalDOMEvent(cm, "scrollCursorIntoView")) { return }
+
+    var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
+    if (rect.top + box.top < 0) { doScroll = true; }
+    else if (rect.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) { doScroll = false; }
+    if (doScroll != null && !phantom) {
+      var scrollNode = elt("div", "\u200b", null, ("position: absolute;\n                         top: " + (rect.top - display.viewOffset - paddingTop(cm.display)) + "px;\n                         height: " + (rect.bottom - rect.top + scrollGap(cm) + display.barHeight) + "px;\n                         left: " + (rect.left) + "px; width: " + (Math.max(2, rect.right - rect.left)) + "px;"));
+      cm.display.lineSpace.appendChild(scrollNode);
+      scrollNode.scrollIntoView(doScroll);
+      cm.display.lineSpace.removeChild(scrollNode);
+    }
+  }
+
+  // Scroll a given position into view (immediately), verifying that
+  // it actually became visible (as line heights are accurately
+  // measured, the position of something may 'drift' during drawing).
+  function scrollPosIntoView(cm, pos, end, margin) {
+    if (margin == null) { margin = 0; }
+    var rect;
+    if (!cm.options.lineWrapping && pos == end) {
+      // Set pos and end to the cursor positions around the character pos sticks to
+      // If pos.sticky == "before", that is around pos.ch - 1, otherwise around pos.ch
+      // If pos == Pos(_, 0, "before"), pos and end are unchanged
+      pos = pos.ch ? Pos(pos.line, pos.sticky == "before" ? pos.ch - 1 : pos.ch, "after") : pos;
+      end = pos.sticky == "before" ? Pos(pos.line, pos.ch + 1, "before") : pos;
+    }
+    for (var limit = 0; limit < 5; limit++) {
+      var changed = false;
+      var coords = cursorCoords(cm, pos);
+      var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
+      rect = {left: Math.min(coords.left, endCoords.left),
+              top: Math.min(coords.top, endCoords.top) - margin,
+              right: Math.max(coords.left, endCoords.left),
+              bottom: Math.max(coords.bottom, endCoords.bottom) + margin};
+      var scrollPos = calculateScrollPos(cm, rect);
+      var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
+      if (scrollPos.scrollTop != null) {
+        updateScrollTop(cm, scrollPos.scrollTop);
+        if (Math.abs(cm.doc.scrollTop - startTop) > 1) { changed = true; }
+      }
+      if (scrollPos.scrollLeft != null) {
+        setScrollLeft(cm, scrollPos.scrollLeft);
+        if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) { changed = true; }
+      }
+      if (!changed) { break }
+    }
+    return rect
+  }
+
+  // Scroll a given set of coordinates into view (immediately).
+  function scrollIntoView(cm, rect) {
+    var scrollPos = calculateScrollPos(cm, rect);
+    if (scrollPos.scrollTop != null) { updateScrollTop(cm, scrollPos.scrollTop); }
+    if (scrollPos.scrollLeft != null) { setScrollLeft(cm, scrollPos.scrollLeft); }
+  }
+
+  // Calculate a new scroll position needed to scroll the given
+  // rectangle into view. Returns an object with scrollTop and
+  // scrollLeft properties. When these are undefined, the
+  // vertical/horizontal position does not need to be adjusted.
+  function calculateScrollPos(cm, rect) {
+    var display = cm.display, snapMargin = textHeight(cm.display);
+    if (rect.top < 0) { rect.top = 0; }
+    var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop;
+    var screen = displayHeight(cm), result = {};
+    if (rect.bottom - rect.top > screen) { rect.bottom = rect.top + screen; }
+    var docBottom = cm.doc.height + paddingVert(display);
+    var atTop = rect.top < snapMargin, atBottom = rect.bottom > docBottom - snapMargin;
+    if (rect.top < screentop) {
+      result.scrollTop = atTop ? 0 : rect.top;
+    } else if (rect.bottom > screentop + screen) {
+      var newTop = Math.min(rect.top, (atBottom ? docBottom : rect.bottom) - screen);
+      if (newTop != screentop) { result.scrollTop = newTop; }
+    }
+
+    var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft;
+    var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0);
+    var tooWide = rect.right - rect.left > screenw;
+    if (tooWide) { rect.right = rect.left + screenw; }
+    if (rect.left < 10)
+      { result.scrollLeft = 0; }
+    else if (rect.left < screenleft)
+      { result.scrollLeft = Math.max(0, rect.left - (tooWide ? 0 : 10)); }
+    else if (rect.right > screenw + screenleft - 3)
+      { result.scrollLeft = rect.right + (tooWide ? 0 : 10) - screenw; }
+    return result
+  }
+
+  // Store a relative adjustment to the scroll position in the current
+  // operation (to be applied when the operation finishes).
+  function addToScrollTop(cm, top) {
+    if (top == null) { return }
+    resolveScrollToPos(cm);
+    cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top;
+  }
+
+  // Make sure that at the end of the operation the current cursor is
+  // shown.
+  function ensureCursorVisible(cm) {
+    resolveScrollToPos(cm);
+    var cur = cm.getCursor();
+    cm.curOp.scrollToPos = {from: cur, to: cur, margin: cm.options.cursorScrollMargin};
+  }
+
+  function scrollToCoords(cm, x, y) {
+    if (x != null || y != null) { resolveScrollToPos(cm); }
+    if (x != null) { cm.curOp.scrollLeft = x; }
+    if (y != null) { cm.curOp.scrollTop = y; }
+  }
+
+  function scrollToRange(cm, range$$1) {
+    resolveScrollToPos(cm);
+    cm.curOp.scrollToPos = range$$1;
+  }
+
+  // When an operation has its scrollToPos property set, and another
+  // scroll action is applied before the end of the operation, this
+  // 'simulates' scrolling that position into view in a cheap way, so
+  // that the effect of intermediate scroll commands is not ignored.
+  function resolveScrollToPos(cm) {
+    var range$$1 = cm.curOp.scrollToPos;
+    if (range$$1) {
+      cm.curOp.scrollToPos = null;
+      var from = estimateCoords(cm, range$$1.from), to = estimateCoords(cm, range$$1.to);
+      scrollToCoordsRange(cm, from, to, range$$1.margin);
+    }
+  }
+
+  function scrollToCoordsRange(cm, from, to, margin) {
+    var sPos = calculateScrollPos(cm, {
+      left: Math.min(from.left, to.left),
+      top: Math.min(from.top, to.top) - margin,
+      right: Math.max(from.right, to.right),
+      bottom: Math.max(from.bottom, to.bottom) + margin
+    });
+    scrollToCoords(cm, sPos.scrollLeft, sPos.scrollTop);
+  }
+
+  // Sync the scrollable area and scrollbars, ensure the viewport
+  // covers the visible area.
+  function updateScrollTop(cm, val) {
+    if (Math.abs(cm.doc.scrollTop - val) < 2) { return }
+    if (!gecko) { updateDisplaySimple(cm, {top: val}); }
+    setScrollTop(cm, val, true);
+    if (gecko) { updateDisplaySimple(cm); }
+    startWorker(cm, 100);
+  }
+
+  function setScrollTop(cm, val, forceScroll) {
+    val = Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, val);
+    if (cm.display.scroller.scrollTop == val && !forceScroll) { return }
+    cm.doc.scrollTop = val;
+    cm.display.scrollbars.setScrollTop(val);
+    if (cm.display.scroller.scrollTop != val) { cm.display.scroller.scrollTop = val; }
+  }
+
+  // Sync scroller and scrollbar, ensure the gutter elements are
+  // aligned.
+  function setScrollLeft(cm, val, isScroller, forceScroll) {
+    val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth);
+    if ((isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) && !forceScroll) { return }
+    cm.doc.scrollLeft = val;
+    alignHorizontally(cm);
+    if (cm.display.scroller.scrollLeft != val) { cm.display.scroller.scrollLeft = val; }
+    cm.display.scrollbars.setScrollLeft(val);
+  }
+
+  // SCROLLBARS
+
+  // Prepare DOM reads needed to update the scrollbars. Done in one
+  // shot to minimize update/measure roundtrips.
+  function measureForScrollbars(cm) {
+    var d = cm.display, gutterW = d.gutters.offsetWidth;
+    var docH = Math.round(cm.doc.height + paddingVert(cm.display));
+    return {
+      clientHeight: d.scroller.clientHeight,
+      viewHeight: d.wrapper.clientHeight,
+      scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
+      viewWidth: d.wrapper.clientWidth,
+      barLeft: cm.options.fixedGutter ? gutterW : 0,
+      docHeight: docH,
+      scrollHeight: docH + scrollGap(cm) + d.barHeight,
+      nativeBarWidth: d.nativeBarWidth,
+      gutterWidth: gutterW
+    }
+  }
+
+  var NativeScrollbars = function(place, scroll, cm) {
+    this.cm = cm;
+    var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar");
+    var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
+    vert.tabIndex = horiz.tabIndex = -1;
+    place(vert); place(horiz);
+
+    on(vert, "scroll", function () {
+      if (vert.clientHeight) { scroll(vert.scrollTop, "vertical"); }
+    });
+    on(horiz, "scroll", function () {
+      if (horiz.clientWidth) { scroll(horiz.scrollLeft, "horizontal"); }
+    });
+
+    this.checkedZeroWidth = false;
+    // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
+    if (ie && ie_version < 8) { this.horiz.style.minHeight = this.vert.style.minWidth = "18px"; }
+  };
+
+  NativeScrollbars.prototype.update = function (measure) {
+    var needsH = measure.scrollWidth > measure.clientWidth + 1;
+    var needsV = measure.scrollHeight > measure.clientHeight + 1;
+    var sWidth = measure.nativeBarWidth;
+
+    if (needsV) {
+      this.vert.style.display = "block";
+      this.vert.style.bottom = needsH ? sWidth + "px" : "0";
+      var totalHeight = measure.viewHeight - (needsH ? sWidth : 0);
+      // A bug in IE8 can cause this value to be negative, so guard it.
+      this.vert.firstChild.style.height =
+        Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px";
+    } else {
+      this.vert.style.display = "";
+      this.vert.firstChild.style.height = "0";
+    }
+
+    if (needsH) {
+      this.horiz.style.display = "block";
+      this.horiz.style.right = needsV ? sWidth + "px" : "0";
+      this.horiz.style.left = measure.barLeft + "px";
+      var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0);
+      this.horiz.firstChild.style.width =
+        Math.max(0, measure.scrollWidth - measure.clientWidth + totalWidth) + "px";
+    } else {
+      this.horiz.style.display = "";
+      this.horiz.firstChild.style.width = "0";
+    }
+
+    if (!this.checkedZeroWidth && measure.clientHeight > 0) {
+      if (sWidth == 0) { this.zeroWidthHack(); }
+      this.checkedZeroWidth = true;
+    }
+
+    return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}
+  };
+
+  NativeScrollbars.prototype.setScrollLeft = function (pos) {
+    if (this.horiz.scrollLeft != pos) { this.horiz.scrollLeft = pos; }
+    if (this.disableHoriz) { this.enableZeroWidthBar(this.horiz, this.disableHoriz, "horiz"); }
+  };
+
+  NativeScrollbars.prototype.setScrollTop = function (pos) {
+    if (this.vert.scrollTop != pos) { this.vert.scrollTop = pos; }
+    if (this.disableVert) { this.enableZeroWidthBar(this.vert, this.disableVert, "vert"); }
+  };
+
+  NativeScrollbars.prototype.zeroWidthHack = function () {
+    var w = mac && !mac_geMountainLion ? "12px" : "18px";
+    this.horiz.style.height = this.vert.style.width = w;
+    this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none";
+    this.disableHoriz = new Delayed;
+    this.disableVert = new Delayed;
+  };
+
+  NativeScrollbars.prototype.enableZeroWidthBar = function (bar, delay, type) {
+    bar.style.pointerEvents = "auto";
+    function maybeDisable() {
+      // To find out whether the scrollbar is still visible, we
+      // check whether the element under the pixel in the bottom
+      // right corner of the scrollbar box is the scrollbar box
+      // itself (when the bar is still visible) or its filler child
+      // (when the bar is hidden). If it is still visible, we keep
+      // it enabled, if it's hidden, we disable pointer events.
+      var box = bar.getBoundingClientRect();
+      var elt$$1 = type == "vert" ? document.elementFromPoint(box.right - 1, (box.top + box.bottom) / 2)
+          : document.elementFromPoint((box.right + box.left) / 2, box.bottom - 1);
+      if (elt$$1 != bar) { bar.style.pointerEvents = "none"; }
+      else { delay.set(1000, maybeDisable); }
+    }
+    delay.set(1000, maybeDisable);
+  };
+
+  NativeScrollbars.prototype.clear = function () {
+    var parent = this.horiz.parentNode;
+    parent.removeChild(this.horiz);
+    parent.removeChild(this.vert);
+  };
+
+  var NullScrollbars = function () {};
+
+  NullScrollbars.prototype.update = function () { return {bottom: 0, right: 0} };
+  NullScrollbars.prototype.setScrollLeft = function () {};
+  NullScrollbars.prototype.setScrollTop = function () {};
+  NullScrollbars.prototype.clear = function () {};
+
+  function updateScrollbars(cm, measure) {
+    if (!measure) { measure = measureForScrollbars(cm); }
+    var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight;
+    updateScrollbarsInner(cm, measure);
+    for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
+      if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
+        { updateHeightsInViewport(cm); }
+      updateScrollbarsInner(cm, measureForScrollbars(cm));
+      startWidth = cm.display.barWidth; startHeight = cm.display.barHeight;
+    }
+  }
+
+  // Re-synchronize the fake scrollbars with the actual size of the
+  // content.
+  function updateScrollbarsInner(cm, measure) {
+    var d = cm.display;
+    var sizes = d.scrollbars.update(measure);
+
+    d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px";
+    d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px";
+    d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent";
+
+    if (sizes.right && sizes.bottom) {
+      d.scrollbarFiller.style.display = "block";
+      d.scrollbarFiller.style.height = sizes.bottom + "px";
+      d.scrollbarFiller.style.width = sizes.right + "px";
+    } else { d.scrollbarFiller.style.display = ""; }
+    if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
+      d.gutterFiller.style.display = "block";
+      d.gutterFiller.style.height = sizes.bottom + "px";
+      d.gutterFiller.style.width = measure.gutterWidth + "px";
+    } else { d.gutterFiller.style.display = ""; }
+  }
+
+  var scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars};
+
+  function initScrollbars(cm) {
+    if (cm.display.scrollbars) {
+      cm.display.scrollbars.clear();
+      if (cm.display.scrollbars.addClass)
+        { rmClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
+    }
+
+    cm.display.scrollbars = new scrollbarModel[cm.options.scrollbarStyle](function (node) {
+      cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller);
+      // Prevent clicks in the scrollbars from killing focus
+      on(node, "mousedown", function () {
+        if (cm.state.focused) { setTimeout(function () { return cm.display.input.focus(); }, 0); }
+      });
+      node.setAttribute("cm-not-content", "true");
+    }, function (pos, axis) {
+      if (axis == "horizontal") { setScrollLeft(cm, pos); }
+      else { updateScrollTop(cm, pos); }
+    }, cm);
+    if (cm.display.scrollbars.addClass)
+      { addClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
+  }
+
+  // Operations are used to wrap a series of changes to the editor
+  // state in such a way that each change won't have to update the
+  // cursor and display (which would be awkward, slow, and
+  // error-prone). Instead, display updates are batched and then all
+  // combined and executed at once.
+
+  var nextOpId = 0;
+  // Start a new operation.
+  function startOperation(cm) {
+    cm.curOp = {
+      cm: cm,
+      viewChanged: false,      // Flag that indicates that lines might need to be redrawn
+      startHeight: cm.doc.height, // Used to detect need to update scrollbar
+      forceUpdate: false,      // Used to force a redraw
+      updateInput: 0,       // Whether to reset the input textarea
+      typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
+      changeObjs: null,        // Accumulated changes, for firing change events
+      cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
+      cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
+      selectionChanged: false, // Whether the selection needs to be redrawn
+      updateMaxLine: false,    // Set when the widest line needs to be determined anew
+      scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
+      scrollToPos: null,       // Used to scroll to a specific position
+      focus: false,
+      id: ++nextOpId           // Unique ID
+    };
+    pushOperation(cm.curOp);
+  }
+
+  // Finish an operation, updating the display and signalling delayed events
+  function endOperation(cm) {
+    var op = cm.curOp;
+    if (op) { finishOperation(op, function (group) {
+      for (var i = 0; i < group.ops.length; i++)
+        { group.ops[i].cm.curOp = null; }
+      endOperations(group);
+    }); }
+  }
+
+  // The DOM updates done when an operation finishes are batched so
+  // that the minimum number of relayouts are required.
+  function endOperations(group) {
+    var ops = group.ops;
+    for (var i = 0; i < ops.length; i++) // Read DOM
+      { endOperation_R1(ops[i]); }
+    for (var i$1 = 0; i$1 < ops.length; i$1++) // Write DOM (maybe)
+      { endOperation_W1(ops[i$1]); }
+    for (var i$2 = 0; i$2 < ops.length; i$2++) // Read DOM
+      { endOperation_R2(ops[i$2]); }
+    for (var i$3 = 0; i$3 < ops.length; i$3++) // Write DOM (maybe)
+      { endOperation_W2(ops[i$3]); }
+    for (var i$4 = 0; i$4 < ops.length; i$4++) // Read DOM
+      { endOperation_finish(ops[i$4]); }
+  }
+
+  function endOperation_R1(op) {
+    var cm = op.cm, display = cm.display;
+    maybeClipScrollbars(cm);
+    if (op.updateMaxLine) { findMaxLine(cm); }
+
+    op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
+      op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
+                         op.scrollToPos.to.line >= display.viewTo) ||
+      display.maxLineChanged && cm.options.lineWrapping;
+    op.update = op.mustUpdate &&
+      new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate);
+  }
+
+  function endOperation_W1(op) {
+    op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update);
+  }
+
+  function endOperation_R2(op) {
+    var cm = op.cm, display = cm.display;
+    if (op.updatedDisplay) { updateHeightsInViewport(cm); }
+
+    op.barMeasure = measureForScrollbars(cm);
+
+    // If the max line changed since it was last measured, measure it,
+    // and ensure the document's width matches it.
+    // updateDisplay_W2 will use these properties to do the actual resizing
+    if (display.maxLineChanged && !cm.options.lineWrapping) {
+      op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3;
+      cm.display.sizerWidth = op.adjustWidthTo;
+      op.barMeasure.scrollWidth =
+        Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth);
+      op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm));
+    }
+
+    if (op.updatedDisplay || op.selectionChanged)
+      { op.preparedSelection = display.input.prepareSelection(); }
+  }
+
+  function endOperation_W2(op) {
+    var cm = op.cm;
+
+    if (op.adjustWidthTo != null) {
+      cm.display.sizer.style.minWidth = op.adjustWidthTo + "px";
+      if (op.maxScrollLeft < cm.doc.scrollLeft)
+        { setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true); }
+      cm.display.maxLineChanged = false;
+    }
+
+    var takeFocus = op.focus && op.focus == activeElt();
+    if (op.preparedSelection)
+      { cm.display.input.showSelection(op.preparedSelection, takeFocus); }
+    if (op.updatedDisplay || op.startHeight != cm.doc.height)
+      { updateScrollbars(cm, op.barMeasure); }
+    if (op.updatedDisplay)
+      { setDocumentHeight(cm, op.barMeasure); }
+
+    if (op.selectionChanged) { restartBlink(cm); }
+
+    if (cm.state.focused && op.updateInput)
+      { cm.display.input.reset(op.typing); }
+    if (takeFocus) { ensureFocus(op.cm); }
+  }
+
+  function endOperation_finish(op) {
+    var cm = op.cm, display = cm.display, doc = cm.doc;
+
+    if (op.updatedDisplay) { postUpdateDisplay(cm, op.update); }
+
+    // Abort mouse wheel delta measurement, when scrolling explicitly
+    if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
+      { display.wheelStartX = display.wheelStartY = null; }
+
+    // Propagate the scroll position to the actual DOM scroller
+    if (op.scrollTop != null) { setScrollTop(cm, op.scrollTop, op.forceScroll); }
+
+    if (op.scrollLeft != null) { setScrollLeft(cm, op.scrollLeft, true, true); }
+    // If we need to scroll a specific position into view, do so.
+    if (op.scrollToPos) {
+      var rect = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
+                                   clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin);
+      maybeScrollWindow(cm, rect);
+    }
+
+    // Fire events for markers that are hidden/unidden by editing or
+    // undoing
+    var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
+    if (hidden) { for (var i = 0; i < hidden.length; ++i)
+      { if (!hidden[i].lines.length) { signal(hidden[i], "hide"); } } }
+    if (unhidden) { for (var i$1 = 0; i$1 < unhidden.length; ++i$1)
+      { if (unhidden[i$1].lines.length) { signal(unhidden[i$1], "unhide"); } } }
+
+    if (display.wrapper.offsetHeight)
+      { doc.scrollTop = cm.display.scroller.scrollTop; }
+
+    // Fire change events, and delayed event handlers
+    if (op.changeObjs)
+      { signal(cm, "changes", cm, op.changeObjs); }
+    if (op.update)
+      { op.update.finish(); }
+  }
+
+  // Run the given function in an operation
+  function runInOp(cm, f) {
+    if (cm.curOp) { return f() }
+    startOperation(cm);
+    try { return f() }
+    finally { endOperation(cm); }
+  }
+  // Wraps a function in an operation. Returns the wrapped function.
+  function operation(cm, f) {
+    return function() {
+      if (cm.curOp) { return f.apply(cm, arguments) }
+      startOperation(cm);
+      try { return f.apply(cm, arguments) }
+      finally { endOperation(cm); }
+    }
+  }
+  // Used to add methods to editor and doc instances, wrapping them in
+  // operations.
+  function methodOp(f) {
+    return function() {
+      if (this.curOp) { return f.apply(this, arguments) }
+      startOperation(this);
+      try { return f.apply(this, arguments) }
+      finally { endOperation(this); }
+    }
+  }
+  function docMethodOp(f) {
+    return function() {
+      var cm = this.cm;
+      if (!cm || cm.curOp) { return f.apply(this, arguments) }
+      startOperation(cm);
+      try { return f.apply(this, arguments) }
+      finally { endOperation(cm); }
+    }
+  }
+
+  // HIGHLIGHT WORKER
+
+  function startWorker(cm, time) {
+    if (cm.doc.highlightFrontier < cm.display.viewTo)
+      { cm.state.highlight.set(time, bind(highlightWorker, cm)); }
+  }
+
+  function highlightWorker(cm) {
+    var doc = cm.doc;
+    if (doc.highlightFrontier >= cm.display.viewTo) { return }
+    var end = +new Date + cm.options.workTime;
+    var context = getContextBefore(cm, doc.highlightFrontier);
+    var changedLines = [];
+
+    doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
+      if (context.line >= cm.display.viewFrom) { // Visible
+        var oldStyles = line.styles;
+        var resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null;
+        var highlighted = highlightLine(cm, line, context, true);
+        if (resetState) { context.state = resetState; }
+        line.styles = highlighted.styles;
+        var oldCls = line.styleClasses, newCls = highlighted.classes;
+        if (newCls) { line.styleClasses = newCls; }
+        else if (oldCls) { line.styleClasses = null; }
+        var ischange = !oldStyles || oldStyles.length != line.styles.length ||
+          oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass);
+        for (var i = 0; !ischange && i < oldStyles.length; ++i) { ischange = oldStyles[i] != line.styles[i]; }
+        if (ischange) { changedLines.push(context.line); }
+        line.stateAfter = context.save();
+        context.nextLine();
+      } else {
+        if (line.text.length <= cm.options.maxHighlightLength)
+          { processLine(cm, line.text, context); }
+        line.stateAfter = context.line % 5 == 0 ? context.save() : null;
+        context.nextLine();
+      }
+      if (+new Date > end) {
+        startWorker(cm, cm.options.workDelay);
+        return true
+      }
+    });
+    doc.highlightFrontier = context.line;
+    doc.modeFrontier = Math.max(doc.modeFrontier, context.line);
+    if (changedLines.length) { runInOp(cm, function () {
+      for (var i = 0; i < changedLines.length; i++)
+        { regLineChange(cm, changedLines[i], "text"); }
+    }); }
+  }
+
+  // DISPLAY DRAWING
+
+  var DisplayUpdate = function(cm, viewport, force) {
+    var display = cm.display;
+
+    this.viewport = viewport;
+    // Store some values that we'll need later (but don't want to force a relayout for)
+    this.visible = visibleLines(display, cm.doc, viewport);
+    this.editorIsHidden = !display.wrapper.offsetWidth;
+    this.wrapperHeight = display.wrapper.clientHeight;
+    this.wrapperWidth = display.wrapper.clientWidth;
+    this.oldDisplayWidth = displayWidth(cm);
+    this.force = force;
+    this.dims = getDimensions(cm);
+    this.events = [];
+  };
+
+  DisplayUpdate.prototype.signal = function (emitter, type) {
+    if (hasHandler(emitter, type))
+      { this.events.push(arguments); }
+  };
+  DisplayUpdate.prototype.finish = function () {
+      var this$1 = this;
+
+    for (var i = 0; i < this.events.length; i++)
+      { signal.apply(null, this$1.events[i]); }
+  };
+
+  function maybeClipScrollbars(cm) {
+    var display = cm.display;
+    if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
+      display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth;
+      display.heightForcer.style.height = scrollGap(cm) + "px";
+      display.sizer.style.marginBottom = -display.nativeBarWidth + "px";
+      display.sizer.style.borderRightWidth = scrollGap(cm) + "px";
+      display.scrollbarsClipped = true;
+    }
+  }
+
+  function selectionSnapshot(cm) {
+    if (cm.hasFocus()) { return null }
+    var active = activeElt();
+    if (!active || !contains(cm.display.lineDiv, active)) { return null }
+    var result = {activeElt: active};
+    if (window.getSelection) {
+      var sel = window.getSelection();
+      if (sel.anchorNode && sel.extend && contains(cm.display.lineDiv, sel.anchorNode)) {
+        result.anchorNode = sel.anchorNode;
+        result.anchorOffset = sel.anchorOffset;
+        result.focusNode = sel.focusNode;
+        result.focusOffset = sel.focusOffset;
+      }
+    }
+    return result
+  }
+
+  function restoreSelection(snapshot) {
+    if (!snapshot || !snapshot.activeElt || snapshot.activeElt == activeElt()) { return }
+    snapshot.activeElt.focus();
+    if (snapshot.anchorNode && contains(document.body, snapshot.anchorNode) && contains(document.body, snapshot.focusNode)) {
+      var sel = window.getSelection(), range$$1 = document.createRange();
+      range$$1.setEnd(snapshot.anchorNode, snapshot.anchorOffset);
+      range$$1.collapse(false);
+      sel.removeAllRanges();
+      sel.addRange(range$$1);
+      sel.extend(snapshot.focusNode, snapshot.focusOffset);
+    }
+  }
+
+  // Does the actual updating of the line display. Bails out
+  // (returning false) when there is nothing to be done and forced is
+  // false.
+  function updateDisplayIfNeeded(cm, update) {
+    var display = cm.display, doc = cm.doc;
+
+    if (update.editorIsHidden) {
+      resetView(cm);
+      return false
+    }
+
+    // Bail out if the visible area is already rendered and nothing changed.
+    if (!update.force &&
+        update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
+        (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
+        display.renderedView == display.view && countDirtyView(cm) == 0)
+      { return false }
+
+    if (maybeUpdateLineNumberWidth(cm)) {
+      resetView(cm);
+      update.dims = getDimensions(cm);
+    }
+
+    // Compute a suitable new viewport (from & to)
+    var end = doc.first + doc.size;
+    var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first);
+    var to = Math.min(end, update.visible.to + cm.options.viewportMargin);
+    if (display.viewFrom < from && from - display.viewFrom < 20) { from = Math.max(doc.first, display.viewFrom); }
+    if (display.viewTo > to && display.viewTo - to < 20) { to = Math.min(end, display.viewTo); }
+    if (sawCollapsedSpans) {
+      from = visualLineNo(cm.doc, from);
+      to = visualLineEndNo(cm.doc, to);
+    }
+
+    var different = from != display.viewFrom || to != display.viewTo ||
+      display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth;
+    adjustView(cm, from, to);
+
+    display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom));
+    // Position the mover div to align with the current scroll position
+    cm.display.mover.style.top = display.viewOffset + "px";
+
+    var toUpdate = countDirtyView(cm);
+    if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
+        (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
+      { return false }
+
+    // For big changes, we hide the enclosing element during the
+    // update, since that speeds up the operations on most browsers.
+    var selSnapshot = selectionSnapshot(cm);
+    if (toUpdate > 4) { display.lineDiv.style.display = "none"; }
+    patchDisplay(cm, display.updateLineNumbers, update.dims);
+    if (toUpdate > 4) { display.lineDiv.style.display = ""; }
+    display.renderedView = display.view;
+    // There might have been a widget with a focused element that got
+    // hidden or updated, if so re-focus it.
+    restoreSelection(selSnapshot);
+
+    // Prevent selection and cursors from interfering with the scroll
+    // width and height.
+    removeChildren(display.cursorDiv);
+    removeChildren(display.selectionDiv);
+    display.gutters.style.height = display.sizer.style.minHeight = 0;
+
+    if (different) {
+      display.lastWrapHeight = update.wrapperHeight;
+      display.lastWrapWidth = update.wrapperWidth;
+      startWorker(cm, 400);
+    }
+
+    display.updateLineNumbers = null;
+
+    return true
+  }
+
+  function postUpdateDisplay(cm, update) {
+    var viewport = update.viewport;
+
+    for (var first = true;; first = false) {
+      if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
+        // Clip forced viewport to actual scrollable area.
+        if (viewport && viewport.top != null)
+          { viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)}; }
+        // Updated line heights might result in the drawn area not
+        // actually covering the viewport. Keep looping until it does.
+        update.visible = visibleLines(cm.display, cm.doc, viewport);
+        if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
+          { break }
+      }
+      if (!updateDisplayIfNeeded(cm, update)) { break }
+      updateHeightsInViewport(cm);
+      var barMeasure = measureForScrollbars(cm);
+      updateSelection(cm);
+      updateScrollbars(cm, barMeasure);
+      setDocumentHeight(cm, barMeasure);
+      update.force = false;
+    }
+
+    update.signal(cm, "update", cm);
+    if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
+      update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo);
+      cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo;
+    }
+  }
+
+  function updateDisplaySimple(cm, viewport) {
+    var update = new DisplayUpdate(cm, viewport);
+    if (updateDisplayIfNeeded(cm, update)) {
+      updateHeightsInViewport(cm);
+      postUpdateDisplay(cm, update);
+      var barMeasure = measureForScrollbars(cm);
+      updateSelection(cm);
+      updateScrollbars(cm, barMeasure);
+      setDocumentHeight(cm, barMeasure);
+      update.finish();
+    }
+  }
+
+  // Sync the actual display DOM structure with display.view, removing
+  // nodes for lines that are no longer in view, and creating the ones
+  // that are not there yet, and updating the ones that are out of
+  // date.
+  function patchDisplay(cm, updateNumbersFrom, dims) {
+    var display = cm.display, lineNumbers = cm.options.lineNumbers;
+    var container = display.lineDiv, cur = container.firstChild;
+
+    function rm(node) {
+      var next = node.nextSibling;
+      // Works around a throw-scroll bug in OS X Webkit
+      if (webkit && mac && cm.display.currentWheelTarget == node)
+        { node.style.display = "none"; }
+      else
+        { node.parentNode.removeChild(node); }
+      return next
+    }
+
+    var view = display.view, lineN = display.viewFrom;
+    // Loop over the elements in the view, syncing cur (the DOM nodes
+    // in display.lineDiv) with the view as we go.
+    for (var i = 0; i < view.length; i++) {
+      var lineView = view[i];
+      if (lineView.hidden) ; else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
+        var node = buildLineElement(cm, lineView, lineN, dims);
+        container.insertBefore(node, cur);
+      } else { // Already drawn
+        while (cur != lineView.node) { cur = rm(cur); }
+        var updateNumber = lineNumbers && updateNumbersFrom != null &&
+          updateNumbersFrom <= lineN && lineView.lineNumber;
+        if (lineView.changes) {
+          if (indexOf(lineView.changes, "gutter") > -1) { updateNumber = false; }
+          updateLineForChanges(cm, lineView, lineN, dims);
+        }
+        if (updateNumber) {
+          removeChildren(lineView.lineNumber);
+          lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)));
+        }
+        cur = lineView.node.nextSibling;
+      }
+      lineN += lineView.size;
+    }
+    while (cur) { cur = rm(cur); }
+  }
+
+  function updateGutterSpace(display) {
+    var width = display.gutters.offsetWidth;
+    display.sizer.style.marginLeft = width + "px";
+  }
+
+  function setDocumentHeight(cm, measure) {
+    cm.display.sizer.style.minHeight = measure.docHeight + "px";
+    cm.display.heightForcer.style.top = measure.docHeight + "px";
+    cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px";
+  }
+
+  // Re-align line numbers and gutter marks to compensate for
+  // horizontal scrolling.
+  function alignHorizontally(cm) {
+    var display = cm.display, view = display.view;
+    if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) { return }
+    var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
+    var gutterW = display.gutters.offsetWidth, left = comp + "px";
+    for (var i = 0; i < view.length; i++) { if (!view[i].hidden) {
+      if (cm.options.fixedGutter) {
+        if (view[i].gutter)
+          { view[i].gutter.style.left = left; }
+        if (view[i].gutterBackground)
+          { view[i].gutterBackground.style.left = left; }
+      }
+      var align = view[i].alignable;
+      if (align) { for (var j = 0; j < align.length; j++)
+        { align[j].style.left = left; } }
+    } }
+    if (cm.options.fixedGutter)
+      { display.gutters.style.left = (comp + gutterW) + "px"; }
+  }
+
+  // Used to ensure that the line number gutter is still the right
+  // size for the current document size. Returns true when an update
+  // is needed.
+  function maybeUpdateLineNumberWidth(cm) {
+    if (!cm.options.lineNumbers) { return false }
+    var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
+    if (last.length != display.lineNumChars) {
+      var test = display.measure.appendChild(elt("div", [elt("div", last)],
+                                                 "CodeMirror-linenumber CodeMirror-gutter-elt"));
+      var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
+      display.lineGutter.style.width = "";
+      display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1;
+      display.lineNumWidth = display.lineNumInnerWidth + padding;
+      display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
+      display.lineGutter.style.width = display.lineNumWidth + "px";
+      updateGutterSpace(cm.display);
+      return true
+    }
+    return false
+  }
+
+  function getGutters(gutters, lineNumbers) {
+    var result = [], sawLineNumbers = false;
+    for (var i = 0; i < gutters.length; i++) {
+      var name = gutters[i], style = null;
+      if (typeof name != "string") { style = name.style; name = name.className; }
+      if (name == "CodeMirror-linenumbers") {
+        if (!lineNumbers) { continue }
+        else { sawLineNumbers = true; }
+      }
+      result.push({className: name, style: style});
+    }
+    if (lineNumbers && !sawLineNumbers) { result.push({className: "CodeMirror-linenumbers", style: null}); }
+    return result
+  }
+
+  // Rebuild the gutter elements, ensure the margin to the left of the
+  // code matches their width.
+  function renderGutters(display) {
+    var gutters = display.gutters, specs = display.gutterSpecs;
+    removeChildren(gutters);
+    display.lineGutter = null;
+    for (var i = 0; i < specs.length; ++i) {
+      var ref = specs[i];
+      var className = ref.className;
+      var style = ref.style;
+      var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + className));
+      if (style) { gElt.style.cssText = style; }
+      if (className == "CodeMirror-linenumbers") {
+        display.lineGutter = gElt;
+        gElt.style.width = (display.lineNumWidth || 1) + "px";
+      }
+    }
+    gutters.style.display = specs.length ? "" : "none";
+    updateGutterSpace(display);
+  }
+
+  function updateGutters(cm) {
+    renderGutters(cm.display);
+    regChange(cm);
+    alignHorizontally(cm);
+  }
+
+  // The display handles the DOM integration, both for input reading
+  // and content drawing. It holds references to DOM nodes and
+  // display-related state.
+
+  function Display(place, doc, input, options) {
+    var d = this;
+    this.input = input;
+
+    // Covers bottom-right square when both scrollbars are present.
+    d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
+    d.scrollbarFiller.setAttribute("cm-not-content", "true");
+    // Covers bottom of gutter when coverGutterNextToScrollbar is on
+    // and h scrollbar is present.
+    d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
+    d.gutterFiller.setAttribute("cm-not-content", "true");
+    // Will contain the actual code, positioned to cover the viewport.
+    d.lineDiv = eltP("div", null, "CodeMirror-code");
+    // Elements are added to these to represent selection and cursors.
+    d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
+    d.cursorDiv = elt("div", null, "CodeMirror-cursors");
+    // A visibility: hidden element used to find the size of things.
+    d.measure = elt("div", null, "CodeMirror-measure");
+    // When lines outside of the viewport are measured, they are drawn in this.
+    d.lineMeasure = elt("div", null, "CodeMirror-measure");
+    // Wraps everything that needs to exist inside the vertically-padded coordinate system
+    d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
+                      null, "position: relative; outline: none");
+    var lines = eltP("div", [d.lineSpace], "CodeMirror-lines");
+    // Moved around its parent to cover visible view.
+    d.mover = elt("div", [lines], null, "position: relative");
+    // Set to the height of the document, allowing scrolling.
+    d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
+    d.sizerWidth = null;
+    // Behavior of elts with overflow: auto and padding is
+    // inconsistent across browsers. This is used to ensure the
+    // scrollable area is big enough.
+    d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;");
+    // Will contain the gutters, if any.
+    d.gutters = elt("div", null, "CodeMirror-gutters");
+    d.lineGutter = null;
+    // Actual scrollable element.
+    d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
+    d.scroller.setAttribute("tabIndex", "-1");
+    // The element in which the editor lives.
+    d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");
+
+    // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
+    if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
+    if (!webkit && !(gecko && mobile)) { d.scroller.draggable = true; }
+
+    if (place) {
+      if (place.appendChild) { place.appendChild(d.wrapper); }
+      else { place(d.wrapper); }
+    }
+
+    // Current rendered range (may be bigger than the view window).
+    d.viewFrom = d.viewTo = doc.first;
+    d.reportedViewFrom = d.reportedViewTo = doc.first;
+    // Information about the rendered lines.
+    d.view = [];
+    d.renderedView = null;
+    // Holds info about a single rendered line when it was rendered
+    // for measurement, while not in view.
+    d.externalMeasured = null;
+    // Empty space (in pixels) above the view
+    d.viewOffset = 0;
+    d.lastWrapHeight = d.lastWrapWidth = 0;
+    d.updateLineNumbers = null;
+
+    d.nativeBarWidth = d.barHeight = d.barWidth = 0;
+    d.scrollbarsClipped = false;
+
+    // Used to only resize the line number gutter when necessary (when
+    // the amount of lines crosses a boundary that makes its width change)
+    d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
+    // Set to true when a non-horizontal-scrolling line widget is
+    // added. As an optimization, line widget aligning is skipped when
+    // this is false.
+    d.alignWidgets = false;
+
+    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
+
+    // Tracks the maximum line length so that the horizontal scrollbar
+    // can be kept static when scrolling.
+    d.maxLine = null;
+    d.maxLineLength = 0;
+    d.maxLineChanged = false;
+
+    // Used for measuring wheel scrolling granularity
+    d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
+
+    // True when shift is held down.
+    d.shift = false;
+
+    // Used to track whether anything happened since the context menu
+    // was opened.
+    d.selForContextMenu = null;
+
+    d.activeTouch = null;
+
+    d.gutterSpecs = getGutters(options.gutters, options.lineNumbers);
+    renderGutters(d);
+
+    input.init(d);
+  }
+
+  // Since the delta values reported on mouse wheel events are
+  // unstandardized between browsers and even browser versions, and
+  // generally horribly unpredictable, this code starts by measuring
+  // the scroll effect that the first few mouse wheel events have,
+  // and, from that, detects the way it can convert deltas to pixel
+  // offsets afterwards.
+  //
+  // The reason we want to know the amount a wheel event will scroll
+  // is that it gives us a chance to update the display before the
+  // actual scrolling happens, reducing flickering.
+
+  var wheelSamples = 0, wheelPixelsPerUnit = null;
+  // Fill in a browser-detected starting value on browsers where we
+  // know one. These don't have to be accurate -- the result of them
+  // being wrong would just be a slight flicker on the first wheel
+  // scroll (if it is large enough).
+  if (ie) { wheelPixelsPerUnit = -.53; }
+  else if (gecko) { wheelPixelsPerUnit = 15; }
+  else if (chrome) { wheelPixelsPerUnit = -.7; }
+  else if (safari) { wheelPixelsPerUnit = -1/3; }
+
+  function wheelEventDelta(e) {
+    var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
+    if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) { dx = e.detail; }
+    if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) { dy = e.detail; }
+    else if (dy == null) { dy = e.wheelDelta; }
+    return {x: dx, y: dy}
+  }
+  function wheelEventPixels(e) {
+    var delta = wheelEventDelta(e);
+    delta.x *= wheelPixelsPerUnit;
+    delta.y *= wheelPixelsPerUnit;
+    return delta
+  }
+
+  function onScrollWheel(cm, e) {
+    var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y;
+
+    var display = cm.display, scroll = display.scroller;
+    // Quit if there's nothing to scroll here
+    var canScrollX = scroll.scrollWidth > scroll.clientWidth;
+    var canScrollY = scroll.scrollHeight > scroll.clientHeight;
+    if (!(dx && canScrollX || dy && canScrollY)) { return }
+
+    // Webkit browsers on OS X abort momentum scrolls when the target
+    // of the scroll event is removed from the scrollable element.
+    // This hack (see related code in patchDisplay) makes sure the
+    // element is kept around.
+    if (dy && mac && webkit) {
+      outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
+        for (var i = 0; i < view.length; i++) {
+          if (view[i].node == cur) {
+            cm.display.currentWheelTarget = cur;
+            break outer
+          }
+        }
+      }
+    }
+
+    // On some browsers, horizontal scrolling will cause redraws to
+    // happen before the gutter has been realigned, causing it to
+    // wriggle around in a most unseemly way. When we have an
+    // estimated pixels/delta value, we just handle horizontal
+    // scrolling entirely here. It'll be slightly off from native, but
+    // better than glitching out.
+    if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
+      if (dy && canScrollY)
+        { updateScrollTop(cm, Math.max(0, scroll.scrollTop + dy * wheelPixelsPerUnit)); }
+      setScrollLeft(cm, Math.max(0, scroll.scrollLeft + dx * wheelPixelsPerUnit));
+      // Only prevent default scrolling if vertical scrolling is
+      // actually possible. Otherwise, it causes vertical scroll
+      // jitter on OSX trackpads when deltaX is small and deltaY
+      // is large (issue #3579)
+      if (!dy || (dy && canScrollY))
+        { e_preventDefault(e); }
+      display.wheelStartX = null; // Abort measurement, if in progress
+      return
+    }
+
+    // 'Project' the visible viewport to cover the area that is being
+    // scrolled into view (if we know enough to estimate it).
+    if (dy && wheelPixelsPerUnit != null) {
+      var pixels = dy * wheelPixelsPerUnit;
+      var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
+      if (pixels < 0) { top = Math.max(0, top + pixels - 50); }
+      else { bot = Math.min(cm.doc.height, bot + pixels + 50); }
+      updateDisplaySimple(cm, {top: top, bottom: bot});
+    }
+
+    if (wheelSamples < 20) {
+      if (display.wheelStartX == null) {
+        display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
+        display.wheelDX = dx; display.wheelDY = dy;
+        setTimeout(function () {
+          if (display.wheelStartX == null) { return }
+          var movedX = scroll.scrollLeft - display.wheelStartX;
+          var movedY = scroll.scrollTop - display.wheelStartY;
+          var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
+            (movedX && display.wheelDX && movedX / display.wheelDX);
+          display.wheelStartX = display.wheelStartY = null;
+          if (!sample) { return }
+          wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
+          ++wheelSamples;
+        }, 200);
+      } else {
+        display.wheelDX += dx; display.wheelDY += dy;
+      }
+    }
+  }
+
+  // Selection objects are immutable. A new one is created every time
+  // the selection changes. A selection is one or more non-overlapping
+  // (and non-touching) ranges, sorted, and an integer that indicates
+  // which one is the primary selection (the one that's scrolled into
+  // view, that getCursor returns, etc).
+  var Selection = function(ranges, primIndex) {
+    this.ranges = ranges;
+    this.primIndex = primIndex;
+  };
+
+  Selection.prototype.primary = function () { return this.ranges[this.primIndex] };
+
+  Selection.prototype.equals = function (other) {
+      var this$1 = this;
+
+    if (other == this) { return true }
+    if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) { return false }
+    for (var i = 0; i < this.ranges.length; i++) {
+      var here = this$1.ranges[i], there = other.ranges[i];
+      if (!equalCursorPos(here.anchor, there.anchor) || !equalCursorPos(here.head, there.head)) { return false }
+    }
+    return true
+  };
+
+  Selection.prototype.deepCopy = function () {
+      var this$1 = this;
+
+    var out = [];
+    for (var i = 0; i < this.ranges.length; i++)
+      { out[i] = new Range(copyPos(this$1.ranges[i].anchor), copyPos(this$1.ranges[i].head)); }
+    return new Selection(out, this.primIndex)
+  };
+
+  Selection.prototype.somethingSelected = function () {
+      var this$1 = this;
+
+    for (var i = 0; i < this.ranges.length; i++)
+      { if (!this$1.ranges[i].empty()) { return true } }
+    return false
+  };
+
+  Selection.prototype.contains = function (pos, end) {
+      var this$1 = this;
+
+    if (!end) { end = pos; }
+    for (var i = 0; i < this.ranges.length; i++) {
+      var range = this$1.ranges[i];
+      if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
+        { return i }
+    }
+    return -1
+  };
+
+  var Range = function(anchor, head) {
+    this.anchor = anchor; this.head = head;
+  };
+
+  Range.prototype.from = function () { return minPos(this.anchor, this.head) };
+  Range.prototype.to = function () { return maxPos(this.anchor, this.head) };
+  Range.prototype.empty = function () { return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch };
+
+  // Take an unsorted, potentially overlapping set of ranges, and
+  // build a selection out of it. 'Consumes' ranges array (modifying
+  // it).
+  function normalizeSelection(cm, ranges, primIndex) {
+    var mayTouch = cm && cm.options.selectionsMayTouch;
+    var prim = ranges[primIndex];
+    ranges.sort(function (a, b) { return cmp(a.from(), b.from()); });
+    primIndex = indexOf(ranges, prim);
+    for (var i = 1; i < ranges.length; i++) {
+      var cur = ranges[i], prev = ranges[i - 1];
+      var diff = cmp(prev.to(), cur.from());
+      if (mayTouch && !cur.empty() ? diff > 0 : diff >= 0) {
+        var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to());
+        var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head;
+        if (i <= primIndex) { --primIndex; }
+        ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to));
+      }
+    }
+    return new Selection(ranges, primIndex)
+  }
+
+  function simpleSelection(anchor, head) {
+    return new Selection([new Range(anchor, head || anchor)], 0)
+  }
+
+  // Compute the position of the end of a change (its 'to' property
+  // refers to the pre-change end).
+  function changeEnd(change) {
+    if (!change.text) { return change.to }
+    return Pos(change.from.line + change.text.length - 1,
+               lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0))
+  }
+
+  // Adjust a position to refer to the post-change position of the
+  // same text, or the end of the change if the change covers it.
+  function adjustForChange(pos, change) {
+    if (cmp(pos, change.from) < 0) { return pos }
+    if (cmp(pos, change.to) <= 0) { return changeEnd(change) }
+
+    var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
+    if (pos.line == change.to.line) { ch += changeEnd(change).ch - change.to.ch; }
+    return Pos(line, ch)
+  }
+
+  function computeSelAfterChange(doc, change) {
+    var out = [];
+    for (var i = 0; i < doc.sel.ranges.length; i++) {
+      var range = doc.sel.ranges[i];
+      out.push(new Range(adjustForChange(range.anchor, change),
+                         adjustForChange(range.head, change)));
+    }
+    return normalizeSelection(doc.cm, out, doc.sel.primIndex)
+  }
+
+  function offsetPos(pos, old, nw) {
+    if (pos.line == old.line)
+      { return Pos(nw.line, pos.ch - old.ch + nw.ch) }
+    else
+      { return Pos(nw.line + (pos.line - old.line), pos.ch) }
+  }
+
+  // Used by replaceSelections to allow moving the selection to the
+  // start or around the replaced test. Hint may be "start" or "around".
+  function computeReplacedSel(doc, changes, hint) {
+    var out = [];
+    var oldPrev = Pos(doc.first, 0), newPrev = oldPrev;
+    for (var i = 0; i < changes.length; i++) {
+      var change = changes[i];
+      var from = offsetPos(change.from, oldPrev, newPrev);
+      var to = offsetPos(changeEnd(change), oldPrev, newPrev);
+      oldPrev = change.to;
+      newPrev = to;
+      if (hint == "around") {
+        var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0;
+        out[i] = new Range(inv ? to : from, inv ? from : to);
+      } else {
+        out[i] = new Range(from, from);
+      }
+    }
+    return new Selection(out, doc.sel.primIndex)
+  }
+
+  // Used to get the editor into a consistent state again when options change.
+
+  function loadMode(cm) {
+    cm.doc.mode = getMode(cm.options, cm.doc.modeOption);
+    resetModeState(cm);
+  }
+
+  function resetModeState(cm) {
+    cm.doc.iter(function (line) {
+      if (line.stateAfter) { line.stateAfter = null; }
+      if (line.styles) { line.styles = null; }
+    });
+    cm.doc.modeFrontier = cm.doc.highlightFrontier = cm.doc.first;
+    startWorker(cm, 100);
+    cm.state.modeGen++;
+    if (cm.curOp) { regChange(cm); }
+  }
+
+  // DOCUMENT DATA STRUCTURE
+
+  // By default, updates that start and end at the beginning of a line
+  // are treated specially, in order to make the association of line
+  // widgets and marker elements with the text behave more intuitive.
+  function isWholeLineUpdate(doc, change) {
+    return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
+      (!doc.cm || doc.cm.options.wholeLineUpdateBefore)
+  }
+
+  // Perform a change on the document data structure.
+  function updateDoc(doc, change, markedSpans, estimateHeight$$1) {
+    function spansFor(n) {return markedSpans ? markedSpans[n] : null}
+    function update(line, text, spans) {
+      updateLine(line, text, spans, estimateHeight$$1);
+      signalLater(line, "change", line, change);
+    }
+    function linesFor(start, end) {
+      var result = [];
+      for (var i = start; i < end; ++i)
+        { result.push(new Line(text[i], spansFor(i), estimateHeight$$1)); }
+      return result
+    }
+
+    var from = change.from, to = change.to, text = change.text;
+    var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
+    var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;
+
+    // Adjust the line structure
+    if (change.full) {
+      doc.insert(0, linesFor(0, text.length));
+      doc.remove(text.length, doc.size - text.length);
+    } else if (isWholeLineUpdate(doc, change)) {
+      // This is a whole-line replace. Treated specially to make
+      // sure line objects move the way they are supposed to.
+      var added = linesFor(0, text.length - 1);
+      update(lastLine, lastLine.text, lastSpans);
+      if (nlines) { doc.remove(from.line, nlines); }
+      if (added.length) { doc.insert(from.line, added); }
+    } else if (firstLine == lastLine) {
+      if (text.length == 1) {
+        update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
+      } else {
+        var added$1 = linesFor(1, text.length - 1);
+        added$1.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight$$1));
+        update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
+        doc.insert(from.line + 1, added$1);
+      }
+    } else if (text.length == 1) {
+      update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
+      doc.remove(from.line + 1, nlines);
+    } else {
+      update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
+      update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
+      var added$2 = linesFor(1, text.length - 1);
+      if (nlines > 1) { doc.remove(from.line + 1, nlines - 1); }
+      doc.insert(from.line + 1, added$2);
+    }
+
+    signalLater(doc, "change", doc, change);
+  }
+
+  // Call f for all linked documents.
+  function linkedDocs(doc, f, sharedHistOnly) {
+    function propagate(doc, skip, sharedHist) {
+      if (doc.linked) { for (var i = 0; i < doc.linked.length; ++i) {
+        var rel = doc.linked[i];
+        if (rel.doc == skip) { continue }
+        var shared = sharedHist && rel.sharedHist;
+        if (sharedHistOnly && !shared) { continue }
+        f(rel.doc, shared);
+        propagate(rel.doc, doc, shared);
+      } }
+    }
+    propagate(doc, null, true);
+  }
+
+  // Attach a document to an editor.
+  function attachDoc(cm, doc) {
+    if (doc.cm) { throw new Error("This document is already in use.") }
+    cm.doc = doc;
+    doc.cm = cm;
+    estimateLineHeights(cm);
+    loadMode(cm);
+    setDirectionClass(cm);
+    if (!cm.options.lineWrapping) { findMaxLine(cm); }
+    cm.options.mode = doc.modeOption;
+    regChange(cm);
+  }
+
+  function setDirectionClass(cm) {
+  (cm.doc.direction == "rtl" ? addClass : rmClass)(cm.display.lineDiv, "CodeMirror-rtl");
+  }
+
+  function directionChanged(cm) {
+    runInOp(cm, function () {
+      setDirectionClass(cm);
+      regChange(cm);
+    });
+  }
+
+  function History(startGen) {
+    // Arrays of change events and selections. Doing something adds an
+    // event to done and clears undo. Undoing moves events from done
+    // to undone, redoing moves them in the other direction.
+    this.done = []; this.undone = [];
+    this.undoDepth = Infinity;
+    // Used to track when changes can be merged into a single undo
+    // event
+    this.lastModTime = this.lastSelTime = 0;
+    this.lastOp = this.lastSelOp = null;
+    this.lastOrigin = this.lastSelOrigin = null;
+    // Used by the isClean() method
+    this.generation = this.maxGeneration = startGen || 1;
+  }
+
+  // Create a history change event from an updateDoc-style change
+  // object.
+  function historyChangeFromChange(doc, change) {
+    var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
+    attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
+    linkedDocs(doc, function (doc) { return attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); }, true);
+    return histChange
+  }
+
+  // Pop all selection events off the end of a history array. Stop at
+  // a change event.
+  function clearSelectionEvents(array) {
+    while (array.length) {
+      var last = lst(array);
+      if (last.ranges) { array.pop(); }
+      else { break }
+    }
+  }
+
+  // Find the top change event in the history. Pop off selection
+  // events that are in the way.
+  function lastChangeEvent(hist, force) {
+    if (force) {
+      clearSelectionEvents(hist.done);
+      return lst(hist.done)
+    } else if (hist.done.length && !lst(hist.done).ranges) {
+      return lst(hist.done)
+    } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
+      hist.done.pop();
+      return lst(hist.done)
+    }
+  }
+
+  // Register a change in the history. Merges changes that are within
+  // a single operation, or are close together with an origin that
+  // allows merging (starting with "+") into a single event.
+  function addChangeToHistory(doc, change, selAfter, opId) {
+    var hist = doc.history;
+    hist.undone.length = 0;
+    var time = +new Date, cur;
+    var last;
+
+    if ((hist.lastOp == opId ||
+         hist.lastOrigin == change.origin && change.origin &&
+         ((change.origin.charAt(0) == "+" && hist.lastModTime > time - (doc.cm ? doc.cm.options.historyEventDelay : 500)) ||
+          change.origin.charAt(0) == "*")) &&
+        (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
+      // Merge this change into the last event
+      last = lst(cur.changes);
+      if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
+        // Optimized case for simple insertion -- don't want to add
+        // new changesets for every character typed
+        last.to = changeEnd(change);
+      } else {
+        // Add new sub-event
+        cur.changes.push(historyChangeFromChange(doc, change));
+      }
+    } else {
+      // Can not be merged, start a new event.
+      var before = lst(hist.done);
+      if (!before || !before.ranges)
+        { pushSelectionToHistory(doc.sel, hist.done); }
+      cur = {changes: [historyChangeFromChange(doc, change)],
+             generation: hist.generation};
+      hist.done.push(cur);
+      while (hist.done.length > hist.undoDepth) {
+        hist.done.shift();
+        if (!hist.done[0].ranges) { hist.done.shift(); }
+      }
+    }
+    hist.done.push(selAfter);
+    hist.generation = ++hist.maxGeneration;
+    hist.lastModTime = hist.lastSelTime = time;
+    hist.lastOp = hist.lastSelOp = opId;
+    hist.lastOrigin = hist.lastSelOrigin = change.origin;
+
+    if (!last) { signal(doc, "historyAdded"); }
+  }
+
+  function selectionEventCanBeMerged(doc, origin, prev, sel) {
+    var ch = origin.charAt(0);
+    return ch == "*" ||
+      ch == "+" &&
+      prev.ranges.length == sel.ranges.length &&
+      prev.somethingSelected() == sel.somethingSelected() &&
+      new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500)
+  }
+
+  // Called whenever the selection changes, sets the new selection as
+  // the pending selection in the history, and pushes the old pending
+  // selection into the 'done' array when it was significantly
+  // different (in number of selected ranges, emptiness, or time).
+  function addSelectionToHistory(doc, sel, opId, options) {
+    var hist = doc.history, origin = options && options.origin;
+
+    // A new event is started when the previous origin does not match
+    // the current, or the origins don't allow matching. Origins
+    // starting with * are always merged, those starting with + are
+    // merged when similar and close together in time.
+    if (opId == hist.lastSelOp ||
+        (origin && hist.lastSelOrigin == origin &&
+         (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
+          selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
+      { hist.done[hist.done.length - 1] = sel; }
+    else
+      { pushSelectionToHistory(sel, hist.done); }
+
+    hist.lastSelTime = +new Date;
+    hist.lastSelOrigin = origin;
+    hist.lastSelOp = opId;
+    if (options && options.clearRedo !== false)
+      { clearSelectionEvents(hist.undone); }
+  }
+
+  function pushSelectionToHistory(sel, dest) {
+    var top = lst(dest);
+    if (!(top && top.ranges && top.equals(sel)))
+      { dest.push(sel); }
+  }
+
+  // Used to store marked span information in the history.
+  function attachLocalSpans(doc, change, from, to) {
+    var existing = change["spans_" + doc.id], n = 0;
+    doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function (line) {
+      if (line.markedSpans)
+        { (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans; }
+      ++n;
+    });
+  }
+
+  // When un/re-doing restores text containing marked spans, those
+  // that have been explicitly cleared should not be restored.
+  function removeClearedSpans(spans) {
+    if (!spans) { return null }
+    var out;
+    for (var i = 0; i < spans.length; ++i) {
+      if (spans[i].marker.explicitlyCleared) { if (!out) { out = spans.slice(0, i); } }
+      else if (out) { out.push(spans[i]); }
+    }
+    return !out ? spans : out.length ? out : null
+  }
+
+  // Retrieve and filter the old marked spans stored in a change event.
+  function getOldSpans(doc, change) {
+    var found = change["spans_" + doc.id];
+    if (!found) { return null }
+    var nw = [];
+    for (var i = 0; i < change.text.length; ++i)
+      { nw.push(removeClearedSpans(found[i])); }
+    return nw
+  }
+
+  // Used for un/re-doing changes from the history. Combines the
+  // result of computing the existing spans with the set of spans that
+  // existed in the history (so that deleting around a span and then
+  // undoing brings back the span).
+  function mergeOldSpans(doc, change) {
+    var old = getOldSpans(doc, change);
+    var stretched = stretchSpansOverChange(doc, change);
+    if (!old) { return stretched }
+    if (!stretched) { return old }
+
+    for (var i = 0; i < old.length; ++i) {
+      var oldCur = old[i], stretchCur = stretched[i];
+      if (oldCur && stretchCur) {
+        spans: for (var j = 0; j < stretchCur.length; ++j) {
+          var span = stretchCur[j];
+          for (var k = 0; k < oldCur.length; ++k)
+            { if (oldCur[k].marker == span.marker) { continue spans } }
+          oldCur.push(span);
+        }
+      } else if (stretchCur) {
+        old[i] = stretchCur;
+      }
+    }
+    return old
+  }
+
+  // Used both to provide a JSON-safe object in .getHistory, and, when
+  // detaching a document, to split the history in two
+  function copyHistoryArray(events, newGroup, instantiateSel) {
+    var copy = [];
+    for (var i = 0; i < events.length; ++i) {
+      var event = events[i];
+      if (event.ranges) {
+        copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event);
+        continue
+      }
+      var changes = event.changes, newChanges = [];
+      copy.push({changes: newChanges});
+      for (var j = 0; j < changes.length; ++j) {
+        var change = changes[j], m = (void 0);
+        newChanges.push({from: change.from, to: change.to, text: change.text});
+        if (newGroup) { for (var prop in change) { if (m = prop.match(/^spans_(\d+)$/)) {
+          if (indexOf(newGroup, Number(m[1])) > -1) {
+            lst(newChanges)[prop] = change[prop];
+            delete change[prop];
+          }
+        } } }
+      }
+    }
+    return copy
+  }
+
+  // The 'scroll' parameter given to many of these indicated whether
+  // the new cursor position should be scrolled into view after
+  // modifying the selection.
+
+  // If shift is held or the extend flag is set, extends a range to
+  // include a given position (and optionally a second position).
+  // Otherwise, simply returns the range between the given positions.
+  // Used for cursor motion and such.
+  function extendRange(range, head, other, extend) {
+    if (extend) {
+      var anchor = range.anchor;
+      if (other) {
+        var posBefore = cmp(head, anchor) < 0;
+        if (posBefore != (cmp(other, anchor) < 0)) {
+          anchor = head;
+          head = other;
+        } else if (posBefore != (cmp(head, other) < 0)) {
+          head = other;
+        }
+      }
+      return new Range(anchor, head)
+    } else {
+      return new Range(other || head, head)
+    }
+  }
+
+  // Extend the primary selection range, discard the rest.
+  function extendSelection(doc, head, other, options, extend) {
+    if (extend == null) { extend = doc.cm && (doc.cm.display.shift || doc.extend); }
+    setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options);
+  }
+
+  // Extend all selections (pos is an array of selections with length
+  // equal the number of selections)
+  function extendSelections(doc, heads, options) {
+    var out = [];
+    var extend = doc.cm && (doc.cm.display.shift || doc.extend);
+    for (var i = 0; i < doc.sel.ranges.length; i++)
+      { out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend); }
+    var newSel = normalizeSelection(doc.cm, out, doc.sel.primIndex);
+    setSelection(doc, newSel, options);
+  }
+
+  // Updates a single range in the selection.
+  function replaceOneSelection(doc, i, range, options) {
+    var ranges = doc.sel.ranges.slice(0);
+    ranges[i] = range;
+    setSelection(doc, normalizeSelection(doc.cm, ranges, doc.sel.primIndex), options);
+  }
+
+  // Reset the selection to a single range.
+  function setSimpleSelection(doc, anchor, head, options) {
+    setSelection(doc, simpleSelection(anchor, head), options);
+  }
+
+  // Give beforeSelectionChange handlers a change to influence a
+  // selection update.
+  function filterSelectionChange(doc, sel, options) {
+    var obj = {
+      ranges: sel.ranges,
+      update: function(ranges) {
+        var this$1 = this;
+
+        this.ranges = [];
+        for (var i = 0; i < ranges.length; i++)
+          { this$1.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
+                                     clipPos(doc, ranges[i].head)); }
+      },
+      origin: options && options.origin
+    };
+    signal(doc, "beforeSelectionChange", doc, obj);
+    if (doc.cm) { signal(doc.cm, "beforeSelectionChange", doc.cm, obj); }
+    if (obj.ranges != sel.ranges) { return normalizeSelection(doc.cm, obj.ranges, obj.ranges.length - 1) }
+    else { return sel }
+  }
+
+  function setSelectionReplaceHistory(doc, sel, options) {
+    var done = doc.history.done, last = lst(done);
+    if (last && last.ranges) {
+      done[done.length - 1] = sel;
+      setSelectionNoUndo(doc, sel, options);
+    } else {
+      setSelection(doc, sel, options);
+    }
+  }
+
+  // Set a new selection.
+  function setSelection(doc, sel, options) {
+    setSelectionNoUndo(doc, sel, options);
+    addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options);
+  }
+
+  function setSelectionNoUndo(doc, sel, options) {
+    if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
+      { sel = filterSelectionChange(doc, sel, options); }
+
+    var bias = options && options.bias ||
+      (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1);
+    setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true));
+
+    if (!(options && options.scroll === false) && doc.cm)
+      { ensureCursorVisible(doc.cm); }
+  }
+
+  function setSelectionInner(doc, sel) {
+    if (sel.equals(doc.sel)) { return }
+
+    doc.sel = sel;
+
+    if (doc.cm) {
+      doc.cm.curOp.updateInput = 1;
+      doc.cm.curOp.selectionChanged = true;
+      signalCursorActivity(doc.cm);
+    }
+    signalLater(doc, "cursorActivity", doc);
+  }
+
+  // Verify that the selection does not partially select any atomic
+  // marked ranges.
+  function reCheckSelection(doc) {
+    setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false));
+  }
+
+  // Return a selection that does not partially select any atomic
+  // ranges.
+  function skipAtomicInSelection(doc, sel, bias, mayClear) {
+    var out;
+    for (var i = 0; i < sel.ranges.length; i++) {
+      var range = sel.ranges[i];
+      var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i];
+      var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear);
+      var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear);
+      if (out || newAnchor != range.anchor || newHead != range.head) {
+        if (!out) { out = sel.ranges.slice(0, i); }
+        out[i] = new Range(newAnchor, newHead);
+      }
+    }
+    return out ? normalizeSelection(doc.cm, out, sel.primIndex) : sel
+  }
+
+  function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
+    var line = getLine(doc, pos.line);
+    if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
+      var sp = line.markedSpans[i], m = sp.marker;
+      if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
+          (sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
+        if (mayClear) {
+          signal(m, "beforeCursorEnter");
+          if (m.explicitlyCleared) {
+            if (!line.markedSpans) { break }
+            else {--i; continue}
+          }
+        }
+        if (!m.atomic) { continue }
+
+        if (oldPos) {
+          var near = m.find(dir < 0 ? 1 : -1), diff = (void 0);
+          if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft)
+            { near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null); }
+          if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
+            { return skipAtomicInner(doc, near, pos, dir, mayClear) }
+        }
+
+        var far = m.find(dir < 0 ? -1 : 1);
+        if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight)
+          { far = movePos(doc, far, dir, far.line == pos.line ? line : null); }
+        return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null
+      }
+    } }
+    return pos
+  }
+
+  // Ensure a given position is not inside an atomic range.
+  function skipAtomic(doc, pos, oldPos, bias, mayClear) {
+    var dir = bias || 1;
+    var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
+        (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
+        skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
+        (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true));
+    if (!found) {
+      doc.cantEdit = true;
+      return Pos(doc.first, 0)
+    }
+    return found
+  }
+
+  function movePos(doc, pos, dir, line) {
+    if (dir < 0 && pos.ch == 0) {
+      if (pos.line > doc.first) { return clipPos(doc, Pos(pos.line - 1)) }
+      else { return null }
+    } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
+      if (pos.line < doc.first + doc.size - 1) { return Pos(pos.line + 1, 0) }
+      else { return null }
+    } else {
+      return new Pos(pos.line, pos.ch + dir)
+    }
+  }
+
+  function selectAll(cm) {
+    cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll);
+  }
+
+  // UPDATING
+
+  // Allow "beforeChange" event handlers to influence a change
+  function filterChange(doc, change, update) {
+    var obj = {
+      canceled: false,
+      from: change.from,
+      to: change.to,
+      text: change.text,
+      origin: change.origin,
+      cancel: function () { return obj.canceled = true; }
+    };
+    if (update) { obj.update = function (from, to, text, origin) {
+      if (from) { obj.from = clipPos(doc, from); }
+      if (to) { obj.to = clipPos(doc, to); }
+      if (text) { obj.text = text; }
+      if (origin !== undefined) { obj.origin = origin; }
+    }; }
+    signal(doc, "beforeChange", doc, obj);
+    if (doc.cm) { signal(doc.cm, "beforeChange", doc.cm, obj); }
+
+    if (obj.canceled) {
+      if (doc.cm) { doc.cm.curOp.updateInput = 2; }
+      return null
+    }
+    return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}
+  }
+
+  // Apply a change to a document, and add it to the document's
+  // history, and propagating it to all linked documents.
+  function makeChange(doc, change, ignoreReadOnly) {
+    if (doc.cm) {
+      if (!doc.cm.curOp) { return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly) }
+      if (doc.cm.state.suppressEdits) { return }
+    }
+
+    if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
+      change = filterChange(doc, change, true);
+      if (!change) { return }
+    }
+
+    // Possibly split or suppress the update based on the presence
+    // of read-only spans in its range.
+    var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
+    if (split) {
+      for (var i = split.length - 1; i >= 0; --i)
+        { makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text, origin: change.origin}); }
+    } else {
+      makeChangeInner(doc, change);
+    }
+  }
+
+  function makeChangeInner(doc, change) {
+    if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) { return }
+    var selAfter = computeSelAfterChange(doc, change);
+    addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);
+
+    makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
+    var rebased = [];
+
+    linkedDocs(doc, function (doc, sharedHist) {
+      if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+        rebaseHist(doc.history, change);
+        rebased.push(doc.history);
+      }
+      makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
+    });
+  }
+
+  // Revert a change stored in a document's history.
+  function makeChangeFromHistory(doc, type, allowSelectionOnly) {
+    var suppress = doc.cm && doc.cm.state.suppressEdits;
+    if (suppress && !allowSelectionOnly) { return }
+
+    var hist = doc.history, event, selAfter = doc.sel;
+    var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;
+
+    // Verify that there is a useable event (so that ctrl-z won't
+    // needlessly clear selection events)
+    var i = 0;
+    for (; i < source.length; i++) {
+      event = source[i];
+      if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
+        { break }
+    }
+    if (i == source.length) { return }
+    hist.lastOrigin = hist.lastSelOrigin = null;
+
+    for (;;) {
+      event = source.pop();
+      if (event.ranges) {
+        pushSelectionToHistory(event, dest);
+        if (allowSelectionOnly && !event.equals(doc.sel)) {
+          setSelection(doc, event, {clearRedo: false});
+          return
+        }
+        selAfter = event;
+      } else if (suppress) {
+        source.push(event);
+        return
+      } else { break }
+    }
+
+    // Build up a reverse change object to add to the opposite history
+    // stack (redo when undoing, and vice versa).
+    var antiChanges = [];
+    pushSelectionToHistory(selAfter, dest);
+    dest.push({changes: antiChanges, generation: hist.generation});
+    hist.generation = event.generation || ++hist.maxGeneration;
+
+    var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");
+
+    var loop = function ( i ) {
+      var change = event.changes[i];
+      change.origin = type;
+      if (filter && !filterChange(doc, change, false)) {
+        source.length = 0;
+        return {}
+      }
+
+      antiChanges.push(historyChangeFromChange(doc, change));
+
+      var after = i ? computeSelAfterChange(doc, change) : lst(source);
+      makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
+      if (!i && doc.cm) { doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}); }
+      var rebased = [];
+
+      // Propagate to the linked documents
+      linkedDocs(doc, function (doc, sharedHist) {
+        if (!sharedHist && indexOf(rebased, doc.history) == -1) {
+          rebaseHist(doc.history, change);
+          rebased.push(doc.history);
+        }
+        makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
+      });
+    };
+
+    for (var i$1 = event.changes.length - 1; i$1 >= 0; --i$1) {
+      var returned = loop( i$1 );
+
+      if ( returned ) return returned.v;
+    }
+  }
+
+  // Sub-views need their line numbers shifted when text is added
+  // above or below them in the parent document.
+  function shiftDoc(doc, distance) {
+    if (distance == 0) { return }
+    doc.first += distance;
+    doc.sel = new Selection(map(doc.sel.ranges, function (range) { return new Range(
+      Pos(range.anchor.line + distance, range.anchor.ch),
+      Pos(range.head.line + distance, range.head.ch)
+    ); }), doc.sel.primIndex);
+    if (doc.cm) {
+      regChange(doc.cm, doc.first, doc.first - distance, distance);
+      for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
+        { regLineChange(doc.cm, l, "gutter"); }
+    }
+  }
+
+  // More lower-level change function, handling only a single document
+  // (not linked ones).
+  function makeChangeSingleDoc(doc, change, selAfter, spans) {
+    if (doc.cm && !doc.cm.curOp)
+      { return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans) }
+
+    if (change.to.line < doc.first) {
+      shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
+      return
+    }
+    if (change.from.line > doc.lastLine()) { return }
+
+    // Clip the change to the size of this doc
+    if (change.from.line < doc.first) {
+      var shift = change.text.length - 1 - (doc.first - change.from.line);
+      shiftDoc(doc, shift);
+      change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
+                text: [lst(change.text)], origin: change.origin};
+    }
+    var last = doc.lastLine();
+    if (change.to.line > last) {
+      change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
+                text: [change.text[0]], origin: change.origin};
+    }
+
+    change.removed = getBetween(doc, change.from, change.to);
+
+    if (!selAfter) { selAfter = computeSelAfterChange(doc, change); }
+    if (doc.cm) { makeChangeSingleDocInEditor(doc.cm, change, spans); }
+    else { updateDoc(doc, change, spans); }
+    setSelectionNoUndo(doc, selAfter, sel_dontScroll);
+  }
+
+  // Handle the interaction of a change to a document with the editor
+  // that this document is part of.
+  function makeChangeSingleDocInEditor(cm, change, spans) {
+    var doc = cm.doc, display = cm.display, from = change.from, to = change.to;
+
+    var recomputeMaxLength = false, checkWidthStart = from.line;
+    if (!cm.options.lineWrapping) {
+      checkWidthStart = lineNo(visualLine(getLine(doc, from.line)));
+      doc.iter(checkWidthStart, to.line + 1, function (line) {
+        if (line == display.maxLine) {
+          recomputeMaxLength = true;
+          return true
+        }
+      });
+    }
+
+    if (doc.sel.contains(change.from, change.to) > -1)
+      { signalCursorActivity(cm); }
+
+    updateDoc(doc, change, spans, estimateHeight(cm));
+
+    if (!cm.options.lineWrapping) {
+      doc.iter(checkWidthStart, from.line + change.text.length, function (line) {
+        var len = lineLength(line);
+        if (len > display.maxLineLength) {
+          display.maxLine = line;
+          display.maxLineLength = len;
+          display.maxLineChanged = true;
+          recomputeMaxLength = false;
+        }
+      });
+      if (recomputeMaxLength) { cm.curOp.updateMaxLine = true; }
+    }
+
+    retreatFrontier(doc, from.line);
+    startWorker(cm, 400);
+
+    var lendiff = change.text.length - (to.line - from.line) - 1;
+    // Remember that these lines changed, for updating the display
+    if (change.full)
+      { regChange(cm); }
+    else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
+      { regLineChange(cm, from.line, "text"); }
+    else
+      { regChange(cm, from.line, to.line + 1, lendiff); }
+
+    var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change");
+    if (changeHandler || changesHandler) {
+      var obj = {
+        from: from, to: to,
+        text: change.text,
+        removed: change.removed,
+        origin: change.origin
+      };
+      if (changeHandler) { signalLater(cm, "change", cm, obj); }
+      if (changesHandler) { (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj); }
+    }
+    cm.display.selForContextMenu = null;
+  }
+
+  function replaceRange(doc, code, from, to, origin) {
+    var assign;
+
+    if (!to) { to = from; }
+    if (cmp(to, from) < 0) { (assign = [to, from], from = assign[0], to = assign[1]); }
+    if (typeof code == "string") { code = doc.splitLines(code); }
+    makeChange(doc, {from: from, to: to, text: code, origin: origin});
+  }
+
+  // Rebasing/resetting history to deal with externally-sourced changes
+
+  function rebaseHistSelSingle(pos, from, to, diff) {
+    if (to < pos.line) {
+      pos.line += diff;
+    } else if (from < pos.line) {
+      pos.line = from;
+      pos.ch = 0;
+    }
+  }
+
+  // Tries to rebase an array of history events given a change in the
+  // document. If the change touches the same lines as the event, the
+  // event, and everything 'behind' it, is discarded. If the change is
+  // before the event, the event's positions are updated. Uses a
+  // copy-on-write scheme for the positions, to avoid having to
+  // reallocate them all on every rebase, but also avoid problems with
+  // shared position objects being unsafely updated.
+  function rebaseHistArray(array, from, to, diff) {
+    for (var i = 0; i < array.length; ++i) {
+      var sub = array[i], ok = true;
+      if (sub.ranges) {
+        if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; }
+        for (var j = 0; j < sub.ranges.length; j++) {
+          rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff);
+          rebaseHistSelSingle(sub.ranges[j].head, from, to, diff);
+        }
+        continue
+      }
+      for (var j$1 = 0; j$1 < sub.changes.length; ++j$1) {
+        var cur = sub.changes[j$1];
+        if (to < cur.from.line) {
+          cur.from = Pos(cur.from.line + diff, cur.from.ch);
+          cur.to = Pos(cur.to.line + diff, cur.to.ch);
+        } else if (from <= cur.to.line) {
+          ok = false;
+          break
+        }
+      }
+      if (!ok) {
+        array.splice(0, i + 1);
+        i = 0;
+      }
+    }
+  }
+
+  function rebaseHist(hist, change) {
+    var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
+    rebaseHistArray(hist.done, from, to, diff);
+    rebaseHistArray(hist.undone, from, to, diff);
+  }
+
+  // Utility for applying a change to a line by handle or number,
+  // returning the number and optionally registering the line as
+  // changed.
+  function changeLine(doc, handle, changeType, op) {
+    var no = handle, line = handle;
+    if (typeof handle == "number") { line = getLine(doc, clipLine(doc, handle)); }
+    else { no = lineNo(handle); }
+    if (no == null) { return null }
+    if (op(line, no) && doc.cm) { regLineChange(doc.cm, no, changeType); }
+    return line
+  }
+
+  // The document is represented as a BTree consisting of leaves, with
+  // chunk of lines in them, and branches, with up to ten leaves or
+  // other branch nodes below them. The top node is always a branch
+  // node, and is the document object itself (meaning it has
+  // additional methods and properties).
+  //
+  // All nodes have parent links. The tree is used both to go from
+  // line numbers to line objects, and to go from objects to numbers.
+  // It also indexes by height, and is used to convert between height
+  // and line object, and to find the total height of the document.
+  //
+  // See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html
+
+  function LeafChunk(lines) {
+    var this$1 = this;
+
+    this.lines = lines;
+    this.parent = null;
+    var height = 0;
+    for (var i = 0; i < lines.length; ++i) {
+      lines[i].parent = this$1;
+      height += lines[i].height;
+    }
+    this.height = height;
+  }
+
+  LeafChunk.prototype = {
+    chunkSize: function() { return this.lines.length },
+
+    // Remove the n lines at offset 'at'.
+    removeInner: function(at, n) {
+      var this$1 = this;
+
+      for (var i = at, e = at + n; i < e; ++i) {
+        var line = this$1.lines[i];
+        this$1.height -= line.height;
+        cleanUpLine(line);
+        signalLater(line, "delete");
+      }
+      this.lines.splice(at, n);
+    },
+
+    // Helper used to collapse a small branch into a single leaf.
+    collapse: function(lines) {
+      lines.push.apply(lines, this.lines);
+    },
+
+    // Insert the given array of lines at offset 'at', count them as
+    // having the given height.
+    insertInner: function(at, lines, height) {
+      var this$1 = this;
+
+      this.height += height;
+      this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
+      for (var i = 0; i < lines.length; ++i) { lines[i].parent = this$1; }
+    },
+
+    // Used to iterate over a part of the tree.
+    iterN: function(at, n, op) {
+      var this$1 = this;
+
+      for (var e = at + n; at < e; ++at)
+        { if (op(this$1.lines[at])) { return true } }
+    }
+  };
+
+  function BranchChunk(children) {
+    var this$1 = this;
+
+    this.children = children;
+    var size = 0, height = 0;
+    for (var i = 0; i < children.length; ++i) {
+      var ch = children[i];
+      size += ch.chunkSize(); height += ch.height;
+      ch.parent = this$1;
+    }
+    this.size = size;
+    this.height = height;
+    this.parent = null;
+  }
+
+  BranchChunk.prototype = {
+    chunkSize: function() { return this.size },
+
+    removeInner: function(at, n) {
+      var this$1 = this;
+
+      this.size -= n;
+      for (var i = 0; i < this.children.length; ++i) {
+        var child = this$1.children[i], sz = child.chunkSize();
+        if (at < sz) {
+          var rm = Math.min(n, sz - at), oldHeight = child.height;
+          child.removeInner(at, rm);
+          this$1.height -= oldHeight - child.height;
+          if (sz == rm) { this$1.children.splice(i--, 1); child.parent = null; }
+          if ((n -= rm) == 0) { break }
+          at = 0;
+        } else { at -= sz; }
+      }
+      // If the result is smaller than 25 lines, ensure that it is a
+      // single leaf node.
+      if (this.size - n < 25 &&
+          (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
+        var lines = [];
+        this.collapse(lines);
+        this.children = [new LeafChunk(lines)];
+        this.children[0].parent = this;
+      }
+    },
+
+    collapse: function(lines) {
+      var this$1 = this;
+
+      for (var i = 0; i < this.children.length; ++i) { this$1.children[i].collapse(lines); }
+    },
+
+    insertInner: function(at, lines, height) {
+      var this$1 = this;
+
+      this.size += lines.length;
+      this.height += height;
+      for (var i = 0; i < this.children.length; ++i) {
+        var child = this$1.children[i], sz = child.chunkSize();
+        if (at <= sz) {
+          child.insertInner(at, lines, height);
+          if (child.lines && child.lines.length > 50) {
+            // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
+            // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
+            var remaining = child.lines.length % 25 + 25;
+            for (var pos = remaining; pos < child.lines.length;) {
+              var leaf = new LeafChunk(child.lines.slice(pos, pos += 25));
+              child.height -= leaf.height;
+              this$1.children.splice(++i, 0, leaf);
+              leaf.parent = this$1;
+            }
+            child.lines = child.lines.slice(0, remaining);
+            this$1.maybeSpill();
+          }
+          break
+        }
+        at -= sz;
+      }
+    },
+
+    // When a node has grown, check whether it should be split.
+    maybeSpill: function() {
+      if (this.children.length <= 10) { return }
+      var me = this;
+      do {
+        var spilled = me.children.splice(me.children.length - 5, 5);
+        var sibling = new BranchChunk(spilled);
+        if (!me.parent) { // Become the parent node
+          var copy = new BranchChunk(me.children);
+          copy.parent = me;
+          me.children = [copy, sibling];
+          me = copy;
+       } else {
+          me.size -= sibling.size;
+          me.height -= sibling.height;
+          var myIndex = indexOf(me.parent.children, me);
+          me.parent.children.splice(myIndex + 1, 0, sibling);
+        }
+        sibling.parent = me.parent;
+      } while (me.children.length > 10)
+      me.parent.maybeSpill();
+    },
+
+    iterN: function(at, n, op) {
+      var this$1 = this;
+
+      for (var i = 0; i < this.children.length; ++i) {
+        var child = this$1.children[i], sz = child.chunkSize();
+        if (at < sz) {
+          var used = Math.min(n, sz - at);
+          if (child.iterN(at, used, op)) { return true }
+          if ((n -= used) == 0) { break }
+          at = 0;
+        } else { at -= sz; }
+      }
+    }
+  };
+
+  // Line widgets are block elements displayed above or below a line.
+
+  var LineWidget = function(doc, node, options) {
+    var this$1 = this;
+
+    if (options) { for (var opt in options) { if (options.hasOwnProperty(opt))
+      { this$1[opt] = options[opt]; } } }
+    this.doc = doc;
+    this.node = node;
+  };
+
+  LineWidget.prototype.clear = function () {
+      var this$1 = this;
+
+    var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line);
+    if (no == null || !ws) { return }
+    for (var i = 0; i < ws.length; ++i) { if (ws[i] == this$1) { ws.splice(i--, 1); } }
+    if (!ws.length) { line.widgets = null; }
+    var height = widgetHeight(this);
+    updateLineHeight(line, Math.max(0, line.height - height));
+    if (cm) {
+      runInOp(cm, function () {
+        adjustScrollWhenAboveVisible(cm, line, -height);
+        regLineChange(cm, no, "widget");
+      });
+      signalLater(cm, "lineWidgetCleared", cm, this, no);
+    }
+  };
+
+  LineWidget.prototype.changed = function () {
+      var this$1 = this;
+
+    var oldH = this.height, cm = this.doc.cm, line = this.line;
+    this.height = null;
+    var diff = widgetHeight(this) - oldH;
+    if (!diff) { return }
+    if (!lineIsHidden(this.doc, line)) { updateLineHeight(line, line.height + diff); }
+    if (cm) {
+      runInOp(cm, function () {
+        cm.curOp.forceUpdate = true;
+        adjustScrollWhenAboveVisible(cm, line, diff);
+        signalLater(cm, "lineWidgetChanged", cm, this$1, lineNo(line));
+      });
+    }
+  };
+  eventMixin(LineWidget);
+
+  function adjustScrollWhenAboveVisible(cm, line, diff) {
+    if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
+      { addToScrollTop(cm, diff); }
+  }
+
+  function addLineWidget(doc, handle, node, options) {
+    var widget = new LineWidget(doc, node, options);
+    var cm = doc.cm;
+    if (cm && widget.noHScroll) { cm.display.alignWidgets = true; }
+    changeLine(doc, handle, "widget", function (line) {
+      var widgets = line.widgets || (line.widgets = []);
+      if (widget.insertAt == null) { widgets.push(widget); }
+      else { widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget); }
+      widget.line = line;
+      if (cm && !lineIsHidden(doc, line)) {
+        var aboveVisible = heightAtLine(line) < doc.scrollTop;
+        updateLineHeight(line, line.height + widgetHeight(widget));
+        if (aboveVisible) { addToScrollTop(cm, widget.height); }
+        cm.curOp.forceUpdate = true;
+      }
+      return true
+    });
+    if (cm) { signalLater(cm, "lineWidgetAdded", cm, widget, typeof handle == "number" ? handle : lineNo(handle)); }
+    return widget
+  }
+
+  // TEXTMARKERS
+
+  // Created with markText and setBookmark methods. A TextMarker is a
+  // handle that can be used to clear or find a marked position in the
+  // document. Line objects hold arrays (markedSpans) containing
+  // {from, to, marker} object pointing to such marker objects, and
+  // indicating that such a marker is present on that line. Multiple
+  // lines may point to the same marker when it spans across lines.
+  // The spans will have null for their from/to properties when the
+  // marker continues beyond the start/end of the line. Markers have
+  // links back to the lines they currently touch.
+
+  // Collapsed markers have unique ids, in order to be able to order
+  // them, which is needed for uniquely determining an outer marker
+  // when they overlap (they may nest, but not partially overlap).
+  var nextMarkerId = 0;
+
+  var TextMarker = function(doc, type) {
+    this.lines = [];
+    this.type = type;
+    this.doc = doc;
+    this.id = ++nextMarkerId;
+  };
+
+  // Clear the marker.
+  TextMarker.prototype.clear = function () {
+      var this$1 = this;
+
+    if (this.explicitlyCleared) { return }
+    var cm = this.doc.cm, withOp = cm && !cm.curOp;
+    if (withOp) { startOperation(cm); }
+    if (hasHandler(this, "clear")) {
+      var found = this.find();
+      if (found) { signalLater(this, "clear", found.from, found.to); }
+    }
+    var min = null, max = null;
+    for (var i = 0; i < this.lines.length; ++i) {
+      var line = this$1.lines[i];
+      var span = getMarkedSpanFor(line.markedSpans, this$1);
+      if (cm && !this$1.collapsed) { regLineChange(cm, lineNo(line), "text"); }
+      else if (cm) {
+        if (span.to != null) { max = lineNo(line); }
+        if (span.from != null) { min = lineNo(line); }
+      }
+      line.markedSpans = removeMarkedSpan(line.markedSpans, span);
+      if (span.from == null && this$1.collapsed && !lineIsHidden(this$1.doc, line) && cm)
+        { updateLineHeight(line, textHeight(cm.display)); }
+    }
+    if (cm && this.collapsed && !cm.options.lineWrapping) { for (var i$1 = 0; i$1 < this.lines.length; ++i$1) {
+      var visual = visualLine(this$1.lines[i$1]), len = lineLength(visual);
+      if (len > cm.display.maxLineLength) {
+        cm.display.maxLine = visual;
+        cm.display.maxLineLength = len;
+        cm.display.maxLineChanged = true;
+      }
+    } }
+
+    if (min != null && cm && this.collapsed) { regChange(cm, min, max + 1); }
+    this.lines.length = 0;
+    this.explicitlyCleared = true;
+    if (this.atomic && this.doc.cantEdit) {
+      this.doc.cantEdit = false;
+      if (cm) { reCheckSelection(cm.doc); }
+    }
+    if (cm) { signalLater(cm, "markerCleared", cm, this, min, max); }
+    if (withOp) { endOperation(cm); }
+    if (this.parent) { this.parent.clear(); }
+  };
+
+  // Find the position of the marker in the document. Returns a {from,
+  // to} object by default. Side can be passed to get a specific side
+  // -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
+  // Pos objects returned contain a line object, rather than a line
+  // number (used to prevent looking up the same line twice).
+  TextMarker.prototype.find = function (side, lineObj) {
+      var this$1 = this;
+
+    if (side == null && this.type == "bookmark") { side = 1; }
+    var from, to;
+    for (var i = 0; i < this.lines.length; ++i) {
+      var line = this$1.lines[i];
+      var span = getMarkedSpanFor(line.markedSpans, this$1);
+      if (span.from != null) {
+        from = Pos(lineObj ? line : lineNo(line), span.from);
+        if (side == -1) { return from }
+      }
+      if (span.to != null) {
+        to = Pos(lineObj ? line : lineNo(line), span.to);
+        if (side == 1) { return to }
+      }
+    }
+    return from && {from: from, to: to}
+  };
+
+  // Signals that the marker's widget changed, and surrounding layout
+  // should be recomputed.
+  TextMarker.prototype.changed = function () {
+      var this$1 = this;
+
+    var pos = this.find(-1, true), widget = this, cm = this.doc.cm;
+    if (!pos || !cm) { return }
+    runInOp(cm, function () {
+      var line = pos.line, lineN = lineNo(pos.line);
+      var view = findViewForLine(cm, lineN);
+      if (view) {
+        clearLineMeasurementCacheFor(view);
+        cm.curOp.selectionChanged = cm.curOp.forceUpdate = true;
+      }
+      cm.curOp.updateMaxLine = true;
+      if (!lineIsHidden(widget.doc, line) && widget.height != null) {
+        var oldHeight = widget.height;
+        widget.height = null;
+        var dHeight = widgetHeight(widget) - oldHeight;
+        if (dHeight)
+          { updateLineHeight(line, line.height + dHeight); }
+      }
+      signalLater(cm, "markerChanged", cm, this$1);
+    });
+  };
+
+  TextMarker.prototype.attachLine = function (line) {
+    if (!this.lines.length && this.doc.cm) {
+      var op = this.doc.cm.curOp;
+      if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
+        { (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this); }
+    }
+    this.lines.push(line);
+  };
+
+  TextMarker.prototype.detachLine = function (line) {
+    this.lines.splice(indexOf(this.lines, line), 1);
+    if (!this.lines.length && this.doc.cm) {
+      var op = this.doc.cm.curOp
+      ;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
+    }
+  };
+  eventMixin(TextMarker);
+
+  // Create a marker, wire it up to the right lines, and
+  function markText(doc, from, to, options, type) {
+    // Shared markers (across linked documents) are handled separately
+    // (markTextShared will call out to this again, once per
+    // document).
+    if (options && options.shared) { return markTextShared(doc, from, to, options, type) }
+    // Ensure we are in an operation.
+    if (doc.cm && !doc.cm.curOp) { return operation(doc.cm, markText)(doc, from, to, options, type) }
+
+    var marker = new TextMarker(doc, type), diff = cmp(from, to);
+    if (options) { copyObj(options, marker, false); }
+    // Don't connect empty markers unless clearWhenEmpty is false
+    if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
+      { return marker }
+    if (marker.replacedWith) {
+      // Showing up as a widget implies collapsed (widget replaces text)
+      marker.collapsed = true;
+      marker.widgetNode = eltP("span", [marker.replacedWith], "CodeMirror-widget");
+      if (!options.handleMouseEvents) { marker.widgetNode.setAttribute("cm-ignore-events", "true"); }
+      if (options.insertLeft) { marker.widgetNode.insertLeft = true; }
+    }
+    if (marker.collapsed) {
+      if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
+          from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
+        { throw new Error("Inserting collapsed marker partially overlapping an existing one") }
+      seeCollapsedSpans();
+    }
+
+    if (marker.addToHistory)
+      { addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN); }
+
+    var curLine = from.line, cm = doc.cm, updateMaxLine;
+    doc.iter(curLine, to.line + 1, function (line) {
+      if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
+        { updateMaxLine = true; }
+      if (marker.collapsed && curLine != from.line) { updateLineHeight(line, 0); }
+      addMarkedSpan(line, new MarkedSpan(marker,
+                                         curLine == from.line ? from.ch : null,
+                                         curLine == to.line ? to.ch : null));
+      ++curLine;
+    });
+    // lineIsHidden depends on the presence of the spans, so needs a second pass
+    if (marker.collapsed) { doc.iter(from.line, to.line + 1, function (line) {
+      if (lineIsHidden(doc, line)) { updateLineHeight(line, 0); }
+    }); }
+
+    if (marker.clearOnEnter) { on(marker, "beforeCursorEnter", function () { return marker.clear(); }); }
+
+    if (marker.readOnly) {
+      seeReadOnlySpans();
+      if (doc.history.done.length || doc.history.undone.length)
+        { doc.clearHistory(); }
+    }
+    if (marker.collapsed) {
+      marker.id = ++nextMarkerId;
+      marker.atomic = true;
+    }
+    if (cm) {
+      // Sync editor state
+      if (updateMaxLine) { cm.curOp.updateMaxLine = true; }
+      if (marker.collapsed)
+        { regChange(cm, from.line, to.line + 1); }
+      else if (marker.className || marker.startStyle || marker.endStyle || marker.css ||
+               marker.attributes || marker.title)
+        { for (var i = from.line; i <= to.line; i++) { regLineChange(cm, i, "text"); } }
+      if (marker.atomic) { reCheckSelection(cm.doc); }
+      signalLater(cm, "markerAdded", cm, marker);
+    }
+    return marker
+  }
+
+  // SHARED TEXTMARKERS
+
+  // A shared marker spans multiple linked documents. It is
+  // implemented as a meta-marker-object controlling multiple normal
+  // markers.
+  var SharedTextMarker = function(markers, primary) {
+    var this$1 = this;
+
+    this.markers = markers;
+    this.primary = primary;
+    for (var i = 0; i < markers.length; ++i)
+      { markers[i].parent = this$1; }
+  };
+
+  SharedTextMarker.prototype.clear = function () {
+      var this$1 = this;
+
+    if (this.explicitlyCleared) { return }
+    this.explicitlyCleared = true;
+    for (var i = 0; i < this.markers.length; ++i)
+      { this$1.markers[i].clear(); }
+    signalLater(this, "clear");
+  };
+
+  SharedTextMarker.prototype.find = function (side, lineObj) {
+    return this.primary.find(side, lineObj)
+  };
+  eventMixin(SharedTextMarker);
+
+  function markTextShared(doc, from, to, options, type) {
+    options = copyObj(options);
+    options.shared = false;
+    var markers = [markText(doc, from, to, options, type)], primary = markers[0];
+    var widget = options.widgetNode;
+    linkedDocs(doc, function (doc) {
+      if (widget) { options.widgetNode = widget.cloneNode(true); }
+      markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
+      for (var i = 0; i < doc.linked.length; ++i)
+        { if (doc.linked[i].isParent) { return } }
+      primary = lst(markers);
+    });
+    return new SharedTextMarker(markers, primary)
+  }
+
+  function findSharedMarkers(doc) {
+    return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), function (m) { return m.parent; })
+  }
+
+  function copySharedMarkers(doc, markers) {
+    for (var i = 0; i < markers.length; i++) {
+      var marker = markers[i], pos = marker.find();
+      var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to);
+      if (cmp(mFrom, mTo)) {
+        var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type);
+        marker.markers.push(subMark);
+        subMark.parent = marker;
+      }
+    }
+  }
+
+  function detachSharedMarkers(markers) {
+    var loop = function ( i ) {
+      var marker = markers[i], linked = [marker.primary.doc];
+      linkedDocs(marker.primary.doc, function (d) { return linked.push(d); });
+      for (var j = 0; j < marker.markers.length; j++) {
+        var subMarker = marker.markers[j];
+        if (indexOf(linked, subMarker.doc) == -1) {
+          subMarker.parent = null;
+          marker.markers.splice(j--, 1);
+        }
+      }
+    };
+
+    for (var i = 0; i < markers.length; i++) loop( i );
+  }
+
+  var nextDocId = 0;
+  var Doc = function(text, mode, firstLine, lineSep, direction) {
+    if (!(this instanceof Doc)) { return new Doc(text, mode, firstLine, lineSep, direction) }
+    if (firstLine == null) { firstLine = 0; }
+
+    BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
+    this.first = firstLine;
+    this.scrollTop = this.scrollLeft = 0;
+    this.cantEdit = false;
+    this.cleanGeneration = 1;
+    this.modeFrontier = this.highlightFrontier = firstLine;
+    var start = Pos(firstLine, 0);
+    this.sel = simpleSelection(start);
+    this.history = new History(null);
+    this.id = ++nextDocId;
+    this.modeOption = mode;
+    this.lineSep = lineSep;
+    this.direction = (direction == "rtl") ? "rtl" : "ltr";
+    this.extend = false;
+
+    if (typeof text == "string") { text = this.splitLines(text); }
+    updateDoc(this, {from: start, to: start, text: text});
+    setSelection(this, simpleSelection(start), sel_dontScroll);
+  };
+
+  Doc.prototype = createObj(BranchChunk.prototype, {
+    constructor: Doc,
+    // Iterate over the document. Supports two forms -- with only one
+    // argument, it calls that for each line in the document. With
+    // three, it iterates over the range given by the first two (with
+    // the second being non-inclusive).
+    iter: function(from, to, op) {
+      if (op) { this.iterN(from - this.first, to - from, op); }
+      else { this.iterN(this.first, this.first + this.size, from); }
+    },
+
+    // Non-public interface for adding and removing lines.
+    insert: function(at, lines) {
+      var height = 0;
+      for (var i = 0; i < lines.length; ++i) { height += lines[i].height; }
+      this.insertInner(at - this.first, lines, height);
+    },
+    remove: function(at, n) { this.removeInner(at - this.first, n); },
+
+    // From here, the methods are part of the public interface. Most
+    // are also available from CodeMirror (editor) instances.
+
+    getValue: function(lineSep) {
+      var lines = getLines(this, this.first, this.first + this.size);
+      if (lineSep === false) { return lines }
+      return lines.join(lineSep || this.lineSeparator())
+    },
+    setValue: docMethodOp(function(code) {
+      var top = Pos(this.first, 0), last = this.first + this.size - 1;
+      makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
+                        text: this.splitLines(code), origin: "setValue", full: true}, true);
+      if (this.cm) { scrollToCoords(this.cm, 0, 0); }
+      setSelection(this, simpleSelection(top), sel_dontScroll);
+    }),
+    replaceRange: function(code, from, to, origin) {
+      from = clipPos(this, from);
+      to = to ? clipPos(this, to) : from;
+      replaceRange(this, code, from, to, origin);
+    },
+    getRange: function(from, to, lineSep) {
+      var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
+      if (lineSep === false) { return lines }
+      return lines.join(lineSep || this.lineSeparator())
+    },
+
+    getLine: function(line) {var l = this.getLineHandle(line); return l && l.text},
+
+    getLineHandle: function(line) {if (isLine(this, line)) { return getLine(this, line) }},
+    getLineNumber: function(line) {return lineNo(line)},
+
+    getLineHandleVisualStart: function(line) {
+      if (typeof line == "number") { line = getLine(this, line); }
+      return visualLine(line)
+    },
+
+    lineCount: function() {return this.size},
+    firstLine: function() {return this.first},
+    lastLine: function() {return this.first + this.size - 1},
+
+    clipPos: function(pos) {return clipPos(this, pos)},
+
+    getCursor: function(start) {
+      var range$$1 = this.sel.primary(), pos;
+      if (start == null || start == "head") { pos = range$$1.head; }
+      else if (start == "anchor") { pos = range$$1.anchor; }
+      else if (start == "end" || start == "to" || start === false) { pos = range$$1.to(); }
+      else { pos = range$$1.from(); }
+      return pos
+    },
+    listSelections: function() { return this.sel.ranges },
+    somethingSelected: function() {return this.sel.somethingSelected()},
+
+    setCursor: docMethodOp(function(line, ch, options) {
+      setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options);
+    }),
+    setSelection: docMethodOp(function(anchor, head, options) {
+      setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options);
+    }),
+    extendSelection: docMethodOp(function(head, other, options) {
+      extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
+    }),
+    extendSelections: docMethodOp(function(heads, options) {
+      extendSelections(this, clipPosArray(this, heads), options);
+    }),
+    extendSelectionsBy: docMethodOp(function(f, options) {
+      var heads = map(this.sel.ranges, f);
+      extendSelections(this, clipPosArray(this, heads), options);
+    }),
+    setSelections: docMethodOp(function(ranges, primary, options) {
+      var this$1 = this;
+
+      if (!ranges.length) { return }
+      var out = [];
+      for (var i = 0; i < ranges.length; i++)
+        { out[i] = new Range(clipPos(this$1, ranges[i].anchor),
+                           clipPos(this$1, ranges[i].head)); }
+      if (primary == null) { primary = Math.min(ranges.length - 1, this.sel.primIndex); }
+      setSelection(this, normalizeSelection(this.cm, out, primary), options);
+    }),
+    addSelection: docMethodOp(function(anchor, head, options) {
+      var ranges = this.sel.ranges.slice(0);
+      ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)));
+      setSelection(this, normalizeSelection(this.cm, ranges, ranges.length - 1), options);
+    }),
+
+    getSelection: function(lineSep) {
+      var this$1 = this;
+
+      var ranges = this.sel.ranges, lines;
+      for (var i = 0; i < ranges.length; i++) {
+        var sel = getBetween(this$1, ranges[i].from(), ranges[i].to());
+        lines = lines ? lines.concat(sel) : sel;
+      }
+      if (lineSep === false) { return lines }
+      else { return lines.join(lineSep || this.lineSeparator()) }
+    },
+    getSelections: function(lineSep) {
+      var this$1 = this;
+
+      var parts = [], ranges = this.sel.ranges;
+      for (var i = 0; i < ranges.length; i++) {
+        var sel = getBetween(this$1, ranges[i].from(), ranges[i].to());
+        if (lineSep !== false) { sel = sel.join(lineSep || this$1.lineSeparator()); }
+        parts[i] = sel;
+      }
+      return parts
+    },
+    replaceSelection: function(code, collapse, origin) {
+      var dup = [];
+      for (var i = 0; i < this.sel.ranges.length; i++)
+        { dup[i] = code; }
+      this.replaceSelections(dup, collapse, origin || "+input");
+    },
+    replaceSelections: docMethodOp(function(code, collapse, origin) {
+      var this$1 = this;
+
+      var changes = [], sel = this.sel;
+      for (var i = 0; i < sel.ranges.length; i++) {
+        var range$$1 = sel.ranges[i];
+        changes[i] = {from: range$$1.from(), to: range$$1.to(), text: this$1.splitLines(code[i]), origin: origin};
+      }
+      var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse);
+      for (var i$1 = changes.length - 1; i$1 >= 0; i$1--)
+        { makeChange(this$1, changes[i$1]); }
+      if (newSel) { setSelectionReplaceHistory(this, newSel); }
+      else if (this.cm) { ensureCursorVisible(this.cm); }
+    }),
+    undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}),
+    redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}),
+    undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true);}),
+    redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true);}),
+
+    setExtending: function(val) {this.extend = val;},
+    getExtending: function() {return this.extend},
+
+    historySize: function() {
+      var hist = this.history, done = 0, undone = 0;
+      for (var i = 0; i < hist.done.length; i++) { if (!hist.done[i].ranges) { ++done; } }
+      for (var i$1 = 0; i$1 < hist.undone.length; i$1++) { if (!hist.undone[i$1].ranges) { ++undone; } }
+      return {undo: done, redo: undone}
+    },
+    clearHistory: function() {this.history = new History(this.history.maxGeneration);},
+
+    markClean: function() {
+      this.cleanGeneration = this.changeGeneration(true);
+    },
+    changeGeneration: function(forceSplit) {
+      if (forceSplit)
+        { this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null; }
+      return this.history.generation
+    },
+    isClean: function (gen) {
+      return this.history.generation == (gen || this.cleanGeneration)
+    },
+
+    getHistory: function() {
+      return {done: copyHistoryArray(this.history.done),
+              undone: copyHistoryArray(this.history.undone)}
+    },
+    setHistory: function(histData) {
+      var hist = this.history = new History(this.history.maxGeneration);
+      hist.done = copyHistoryArray(histData.done.slice(0), null, true);
+      hist.undone = copyHistoryArray(histData.undone.slice(0), null, true);
+    },
+
+    setGutterMarker: docMethodOp(function(line, gutterID, value) {
+      return changeLine(this, line, "gutter", function (line) {
+        var markers = line.gutterMarkers || (line.gutterMarkers = {});
+        markers[gutterID] = value;
+        if (!value && isEmpty(markers)) { line.gutterMarkers = null; }
+        return true
+      })
+    }),
+
+    clearGutter: docMethodOp(function(gutterID) {
+      var this$1 = this;
+
+      this.iter(function (line) {
+        if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
+          changeLine(this$1, line, "gutter", function () {
+            line.gutterMarkers[gutterID] = null;
+            if (isEmpty(line.gutterMarkers)) { line.gutterMarkers = null; }
+            return true
+          });
+        }
+      });
+    }),
+
+    lineInfo: function(line) {
+      var n;
+      if (typeof line == "number") {
+        if (!isLine(this, line)) { return null }
+        n = line;
+        line = getLine(this, line);
+        if (!line) { return null }
+      } else {
+        n = lineNo(line);
+        if (n == null) { return null }
+      }
+      return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
+              textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
+              widgets: line.widgets}
+    },
+
+    addLineClass: docMethodOp(function(handle, where, cls) {
+      return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
+        var prop = where == "text" ? "textClass"
+                 : where == "background" ? "bgClass"
+                 : where == "gutter" ? "gutterClass" : "wrapClass";
+        if (!line[prop]) { line[prop] = cls; }
+        else if (classTest(cls).test(line[prop])) { return false }
+        else { line[prop] += " " + cls; }
+        return true
+      })
+    }),
+    removeLineClass: docMethodOp(function(handle, where, cls) {
+      return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
+        var prop = where == "text" ? "textClass"
+                 : where == "background" ? "bgClass"
+                 : where == "gutter" ? "gutterClass" : "wrapClass";
+        var cur = line[prop];
+        if (!cur) { return false }
+        else if (cls == null) { line[prop] = null; }
+        else {
+          var found = cur.match(classTest(cls));
+          if (!found) { return false }
+          var end = found.index + found[0].length;
+          line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
+        }
+        return true
+      })
+    }),
+
+    addLineWidget: docMethodOp(function(handle, node, options) {
+      return addLineWidget(this, handle, node, options)
+    }),
+    removeLineWidget: function(widget) { widget.clear(); },
+
+    markText: function(from, to, options) {
+      return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
+    },
+    setBookmark: function(pos, options) {
+      var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
+                      insertLeft: options && options.insertLeft,
+                      clearWhenEmpty: false, shared: options && options.shared,
+                      handleMouseEvents: options && options.handleMouseEvents};
+      pos = clipPos(this, pos);
+      return markText(this, pos, pos, realOpts, "bookmark")
+    },
+    findMarksAt: function(pos) {
+      pos = clipPos(this, pos);
+      var markers = [], spans = getLine(this, pos.line).markedSpans;
+      if (spans) { for (var i = 0; i < spans.length; ++i) {
+        var span = spans[i];
+        if ((span.from == null || span.from <= pos.ch) &&
+            (span.to == null || span.to >= pos.ch))
+          { markers.push(span.marker.parent || span.marker); }
+      } }
+      return markers
+    },
+    findMarks: function(from, to, filter) {
+      from = clipPos(this, from); to = clipPos(this, to);
+      var found = [], lineNo$$1 = from.line;
+      this.iter(from.line, to.line + 1, function (line) {
+        var spans = line.markedSpans;
+        if (spans) { for (var i = 0; i < spans.length; i++) {
+          var span = spans[i];
+          if (!(span.to != null && lineNo$$1 == from.line && from.ch >= span.to ||
+                span.from == null && lineNo$$1 != from.line ||
+                span.from != null && lineNo$$1 == to.line && span.from >= to.ch) &&
+              (!filter || filter(span.marker)))
+            { found.push(span.marker.parent || span.marker); }
+        } }
+        ++lineNo$$1;
+      });
+      return found
+    },
+    getAllMarks: function() {
+      var markers = [];
+      this.iter(function (line) {
+        var sps = line.markedSpans;
+        if (sps) { for (var i = 0; i < sps.length; ++i)
+          { if (sps[i].from != null) { markers.push(sps[i].marker); } } }
+      });
+      return markers
+    },
+
+    posFromIndex: function(off) {
+      var ch, lineNo$$1 = this.first, sepSize = this.lineSeparator().length;
+      this.iter(function (line) {
+        var sz = line.text.length + sepSize;
+        if (sz > off) { ch = off; return true }
+        off -= sz;
+        ++lineNo$$1;
+      });
+      return clipPos(this, Pos(lineNo$$1, ch))
+    },
+    indexFromPos: function (coords) {
+      coords = clipPos(this, coords);
+      var index = coords.ch;
+      if (coords.line < this.first || coords.ch < 0) { return 0 }
+      var sepSize = this.lineSeparator().length;
+      this.iter(this.first, coords.line, function (line) { // iter aborts when callback returns a truthy value
+        index += line.text.length + sepSize;
+      });
+      return index
+    },
+
+    copy: function(copyHistory) {
+      var doc = new Doc(getLines(this, this.first, this.first + this.size),
+                        this.modeOption, this.first, this.lineSep, this.direction);
+      doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
+      doc.sel = this.sel;
+      doc.extend = false;
+      if (copyHistory) {
+        doc.history.undoDepth = this.history.undoDepth;
+        doc.setHistory(this.getHistory());
+      }
+      return doc
+    },
+
+    linkedDoc: function(options) {
+      if (!options) { options = {}; }
+      var from = this.first, to = this.first + this.size;
+      if (options.from != null && options.from > from) { from = options.from; }
+      if (options.to != null && options.to < to) { to = options.to; }
+      var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep, this.direction);
+      if (options.sharedHist) { copy.history = this.history
+      ; }(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
+      copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
+      copySharedMarkers(copy, findSharedMarkers(this));
+      return copy
+    },
+    unlinkDoc: function(other) {
+      var this$1 = this;
+
+      if (other instanceof CodeMirror) { other = other.doc; }
+      if (this.linked) { for (var i = 0; i < this.linked.length; ++i) {
+        var link = this$1.linked[i];
+        if (link.doc != other) { continue }
+        this$1.linked.splice(i, 1);
+        other.unlinkDoc(this$1);
+        detachSharedMarkers(findSharedMarkers(this$1));
+        break
+      } }
+      // If the histories were shared, split them again
+      if (other.history == this.history) {
+        var splitIds = [other.id];
+        linkedDocs(other, function (doc) { return splitIds.push(doc.id); }, true);
+        other.history = new History(null);
+        other.history.done = copyHistoryArray(this.history.done, splitIds);
+        other.history.undone = copyHistoryArray(this.history.undone, splitIds);
+      }
+    },
+    iterLinkedDocs: function(f) {linkedDocs(this, f);},
+
+    getMode: function() {return this.mode},
+    getEditor: function() {return this.cm},
+
+    splitLines: function(str) {
+      if (this.lineSep) { return str.split(this.lineSep) }
+      return splitLinesAuto(str)
+    },
+    lineSeparator: function() { return this.lineSep || "\n" },
+
+    setDirection: docMethodOp(function (dir) {
+      if (dir != "rtl") { dir = "ltr"; }
+      if (dir == this.direction) { return }
+      this.direction = dir;
+      this.iter(function (line) { return line.order = null; });
+      if (this.cm) { directionChanged(this.cm); }
+    })
+  });
+
+  // Public alias.
+  Doc.prototype.eachLine = Doc.prototype.iter;
+
+  // Kludge to work around strange IE behavior where it'll sometimes
+  // re-fire a series of drag-related events right after the drop (#1551)
+  var lastDrop = 0;
+
+  function onDrop(e) {
+    var cm = this;
+    clearDragCursor(cm);
+    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
+      { return }
+    e_preventDefault(e);
+    if (ie) { lastDrop = +new Date; }
+    var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
+    if (!pos || cm.isReadOnly()) { return }
+    // Might be a file drop, in which case we simply extract the text
+    // and insert it.
+    if (files && files.length && window.FileReader && window.File) {
+      var n = files.length, text = Array(n), read = 0;
+      var loadFile = function (file, i) {
+        if (cm.options.allowDropFileTypes &&
+            indexOf(cm.options.allowDropFileTypes, file.type) == -1)
+          { return }
+
+        var reader = new FileReader;
+        reader.onload = operation(cm, function () {
+          var content = reader.result;
+          if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) { content = ""; }
+          text[i] = content;
+          if (++read == n) {
+            pos = clipPos(cm.doc, pos);
+            var change = {from: pos, to: pos,
+                          text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
+                          origin: "paste"};
+            makeChange(cm.doc, change);
+            setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)));
+          }
+        });
+        reader.readAsText(file);
+      };
+      for (var i = 0; i < n; ++i) { loadFile(files[i], i); }
+    } else { // Normal drop
+      // Don't do a replace if the drop happened inside of the selected text.
+      if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
+        cm.state.draggingText(e);
+        // Ensure the editor is re-focused
+        setTimeout(function () { return cm.display.input.focus(); }, 20);
+        return
+      }
+      try {
+        var text$1 = e.dataTransfer.getData("Text");
+        if (text$1) {
+          var selected;
+          if (cm.state.draggingText && !cm.state.draggingText.copy)
+            { selected = cm.listSelections(); }
+          setSelectionNoUndo(cm.doc, simpleSelection(pos, pos));
+          if (selected) { for (var i$1 = 0; i$1 < selected.length; ++i$1)
+            { replaceRange(cm.doc, "", selected[i$1].anchor, selected[i$1].head, "drag"); } }
+          cm.replaceSelection(text$1, "around", "paste");
+          cm.display.input.focus();
+        }
+      }
+      catch(e){}
+    }
+  }
+
+  function onDragStart(cm, e) {
+    if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
+    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) { return }
+
+    e.dataTransfer.setData("Text", cm.getSelection());
+    e.dataTransfer.effectAllowed = "copyMove";
+
+    // Use dummy image instead of default browsers image.
+    // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
+    if (e.dataTransfer.setDragImage && !safari) {
+      var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
+      img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
+      if (presto) {
+        img.width = img.height = 1;
+        cm.display.wrapper.appendChild(img);
+        // Force a relayout, or Opera won't use our image for some obscure reason
+        img._top = img.offsetTop;
+      }
+      e.dataTransfer.setDragImage(img, 0, 0);
+      if (presto) { img.parentNode.removeChild(img); }
+    }
+  }
+
+  function onDragOver(cm, e) {
+    var pos = posFromMouse(cm, e);
+    if (!pos) { return }
+    var frag = document.createDocumentFragment();
+    drawSelectionCursor(cm, pos, frag);
+    if (!cm.display.dragCursor) {
+      cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors");
+      cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv);
+    }
+    removeChildrenAndAdd(cm.display.dragCursor, frag);
+  }
+
+  function clearDragCursor(cm) {
+    if (cm.display.dragCursor) {
+      cm.display.lineSpace.removeChild(cm.display.dragCursor);
+      cm.display.dragCursor = null;
+    }
+  }
+
+  // These must be handled carefully, because naively registering a
+  // handler for each editor will cause the editors to never be
+  // garbage collected.
+
+  function forEachCodeMirror(f) {
+    if (!document.getElementsByClassName) { return }
+    var byClass = document.getElementsByClassName("CodeMirror"), editors = [];
+    for (var i = 0; i < byClass.length; i++) {
+      var cm = byClass[i].CodeMirror;
+      if (cm) { editors.push(cm); }
+    }
+    if (editors.length) { editors[0].operation(function () {
+      for (var i = 0; i < editors.length; i++) { f(editors[i]); }
+    }); }
+  }
+
+  var globalsRegistered = false;
+  function ensureGlobalHandlers() {
+    if (globalsRegistered) { return }
+    registerGlobalHandlers();
+    globalsRegistered = true;
+  }
+  function registerGlobalHandlers() {
+    // When the window resizes, we need to refresh active editors.
+    var resizeTimer;
+    on(window, "resize", function () {
+      if (resizeTimer == null) { resizeTimer = setTimeout(function () {
+        resizeTimer = null;
+        forEachCodeMirror(onResize);
+      }, 100); }
+    });
+    // When the window loses focus, we want to show the editor as blurred
+    on(window, "blur", function () { return forEachCodeMirror(onBlur); });
+  }
+  // Called when the window resizes
+  function onResize(cm) {
+    var d = cm.display;
+    // Might be a text scaling operation, clear size caches.
+    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
+    d.scrollbarsClipped = false;
+    cm.setSize();
+  }
+
+  var keyNames = {
+    3: "Pause", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
+    19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
+    36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
+    46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
+    106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 145: "ScrollLock",
+    173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
+    221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
+    63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
+  };
+
+  // Number keys
+  for (var i = 0; i < 10; i++) { keyNames[i + 48] = keyNames[i + 96] = String(i); }
+  // Alphabetic keys
+  for (var i$1 = 65; i$1 <= 90; i$1++) { keyNames[i$1] = String.fromCharCode(i$1); }
+  // Function keys
+  for (var i$2 = 1; i$2 <= 12; i$2++) { keyNames[i$2 + 111] = keyNames[i$2 + 63235] = "F" + i$2; }
+
+  var keyMap = {};
+
+  keyMap.basic = {
+    "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
+    "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
+    "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
+    "Tab": "defaultTab", "Shift-Tab": "indentAuto",
+    "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
+    "Esc": "singleSelection"
+  };
+  // Note that the save and find-related commands aren't defined by
+  // default. User code or addons can define them. Unknown commands
+  // are simply ignored.
+  keyMap.pcDefault = {
+    "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
+    "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
+    "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
+    "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
+    "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
+    "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
+    "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
+    "fallthrough": "basic"
+  };
+  // Very basic readline/emacs-style bindings, which are standard on Mac.
+  keyMap.emacsy = {
+    "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
+    "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
+    "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
+    "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
+    "Ctrl-O": "openLine"
+  };
+  keyMap.macDefault = {
+    "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
+    "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
+    "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
+    "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
+    "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
+    "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
+    "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
+    "fallthrough": ["basic", "emacsy"]
+  };
+  keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
+
+  // KEYMAP DISPATCH
+
+  function normalizeKeyName(name) {
+    var parts = name.split(/-(?!$)/);
+    name = parts[parts.length - 1];
+    var alt, ctrl, shift, cmd;
+    for (var i = 0; i < parts.length - 1; i++) {
+      var mod = parts[i];
+      if (/^(cmd|meta|m)$/i.test(mod)) { cmd = true; }
+      else if (/^a(lt)?$/i.test(mod)) { alt = true; }
+      else if (/^(c|ctrl|control)$/i.test(mod)) { ctrl = true; }
+      else if (/^s(hift)?$/i.test(mod)) { shift = true; }
+      else { throw new Error("Unrecognized modifier name: " + mod) }
+    }
+    if (alt) { name = "Alt-" + name; }
+    if (ctrl) { name = "Ctrl-" + name; }
+    if (cmd) { name = "Cmd-" + name; }
+    if (shift) { name = "Shift-" + name; }
+    return name
+  }
+
+  // This is a kludge to keep keymaps mostly working as raw objects
+  // (backwards compatibility) while at the same time support features
+  // like normalization and multi-stroke key bindings. It compiles a
+  // new normalized keymap, and then updates the old object to reflect
+  // this.
+  function normalizeKeyMap(keymap) {
+    var copy = {};
+    for (var keyname in keymap) { if (keymap.hasOwnProperty(keyname)) {
+      var value = keymap[keyname];
+      if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) { continue }
+      if (value == "...") { delete keymap[keyname]; continue }
+
+      var keys = map(keyname.split(" "), normalizeKeyName);
+      for (var i = 0; i < keys.length; i++) {
+        var val = (void 0), name = (void 0);
+        if (i == keys.length - 1) {
+          name = keys.join(" ");
+          val = value;
+        } else {
+          name = keys.slice(0, i + 1).join(" ");
+          val = "...";
+        }
+        var prev = copy[name];
+        if (!prev) { copy[name] = val; }
+        else if (prev != val) { throw new Error("Inconsistent bindings for " + name) }
+      }
+      delete keymap[keyname];
+    } }
+    for (var prop in copy) { keymap[prop] = copy[prop]; }
+    return keymap
+  }
+
+  function lookupKey(key, map$$1, handle, context) {
+    map$$1 = getKeyMap(map$$1);
+    var found = map$$1.call ? map$$1.call(key, context) : map$$1[key];
+    if (found === false) { return "nothing" }
+    if (found === "...") { return "multi" }
+    if (found != null && handle(found)) { return "handled" }
+
+    if (map$$1.fallthrough) {
+      if (Object.prototype.toString.call(map$$1.fallthrough) != "[object Array]")
+        { return lookupKey(key, map$$1.fallthrough, handle, context) }
+      for (var i = 0; i < map$$1.fallthrough.length; i++) {
+        var result = lookupKey(key, map$$1.fallthrough[i], handle, context);
+        if (result) { return result }
+      }
+    }
+  }
+
+  // Modifier key presses don't count as 'real' key presses for the
+  // purpose of keymap fallthrough.
+  function isModifierKey(value) {
+    var name = typeof value == "string" ? value : keyNames[value.keyCode];
+    return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"
+  }
+
+  function addModifierNames(name, event, noShift) {
+    var base = name;
+    if (event.altKey && base != "Alt") { name = "Alt-" + name; }
+    if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") { name = "Ctrl-" + name; }
+    if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") { name = "Cmd-" + name; }
+    if (!noShift && event.shiftKey && base != "Shift") { name = "Shift-" + name; }
+    return name
+  }
+
+  // Look up the name of a key as indicated by an event object.
+  function keyName(event, noShift) {
+    if (presto && event.keyCode == 34 && event["char"]) { return false }
+    var name = keyNames[event.keyCode];
+    if (name == null || event.altGraphKey) { return false }
+    // Ctrl-ScrollLock has keyCode 3, same as Ctrl-Pause,
+    // so we'll use event.code when available (Chrome 48+, FF 38+, Safari 10.1+)
+    if (event.keyCode == 3 && event.code) { name = event.code; }
+    return addModifierNames(name, event, noShift)
+  }
+
+  function getKeyMap(val) {
+    return typeof val == "string" ? keyMap[val] : val
+  }
+
+  // Helper for deleting text near the selection(s), used to implement
+  // backspace, delete, and similar functionality.
+  function deleteNearSelection(cm, compute) {
+    var ranges = cm.doc.sel.ranges, kill = [];
+    // Build up a set of ranges to kill first, merging overlapping
+    // ranges.
+    for (var i = 0; i < ranges.length; i++) {
+      var toKill = compute(ranges[i]);
+      while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
+        var replaced = kill.pop();
+        if (cmp(replaced.from, toKill.from) < 0) {
+          toKill.from = replaced.from;
+          break
+        }
+      }
+      kill.push(toKill);
+    }
+    // Next, remove those actual ranges.
+    runInOp(cm, function () {
+      for (var i = kill.length - 1; i >= 0; i--)
+        { replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete"); }
+      ensureCursorVisible(cm);
+    });
+  }
+
+  function moveCharLogically(line, ch, dir) {
+    var target = skipExtendingChars(line.text, ch + dir, dir);
+    return target < 0 || target > line.text.length ? null : target
+  }
+
+  function moveLogically(line, start, dir) {
+    var ch = moveCharLogically(line, start.ch, dir);
+    return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before")
+  }
+
+  function endOfLine(visually, cm, lineObj, lineNo, dir) {
+    if (visually) {
+      var order = getOrder(lineObj, cm.doc.direction);
+      if (order) {
+        var part = dir < 0 ? lst(order) : order[0];
+        var moveInStorageOrder = (dir < 0) == (part.level == 1);
+        var sticky = moveInStorageOrder ? "after" : "before";
+        var ch;
+        // With a wrapped rtl chunk (possibly spanning multiple bidi parts),
+        // it could be that the last bidi part is not on the last visual line,
+        // since visual lines contain content order-consecutive chunks.
+        // Thus, in rtl, we are looking for the first (content-order) character
+        // in the rtl chunk that is on the last line (that is, the same line
+        // as the last (content-order) character).
+        if (part.level > 0 || cm.doc.direction == "rtl") {
+          var prep = prepareMeasureForLine(cm, lineObj);
+          ch = dir < 0 ? lineObj.text.length - 1 : 0;
+          var targetTop = measureCharPrepared(cm, prep, ch).top;
+          ch = findFirst(function (ch) { return measureCharPrepared(cm, prep, ch).top == targetTop; }, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch);
+          if (sticky == "before") { ch = moveCharLogically(lineObj, ch, 1); }
+        } else { ch = dir < 0 ? part.to : part.from; }
+        return new Pos(lineNo, ch, sticky)
+      }
+    }
+    return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after")
+  }
+
+  function moveVisually(cm, line, start, dir) {
+    var bidi = getOrder(line, cm.doc.direction);
+    if (!bidi) { return moveLogically(line, start, dir) }
+    if (start.ch >= line.text.length) {
+      start.ch = line.text.length;
+      start.sticky = "before";
+    } else if (start.ch <= 0) {
+      start.ch = 0;
+      start.sticky = "after";
+    }
+    var partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos];
+    if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) {
+      // Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines,
+      // nothing interesting happens.
+      return moveLogically(line, start, dir)
+    }
+
+    var mv = function (pos, dir) { return moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir); };
+    var prep;
+    var getWrappedLineExtent = function (ch) {
+      if (!cm.options.lineWrapping) { return {begin: 0, end: line.text.length} }
+      prep = prep || prepareMeasureForLine(cm, line);
+      return wrappedLineExtentChar(cm, line, prep, ch)
+    };
+    var wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch);
+
+    if (cm.doc.direction == "rtl" || part.level == 1) {
+      var moveInStorageOrder = (part.level == 1) == (dir < 0);
+      var ch = mv(start, moveInStorageOrder ? 1 : -1);
+      if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) {
+        // Case 2: We move within an rtl part or in an rtl editor on the same visual line
+        var sticky = moveInStorageOrder ? "before" : "after";
+        return new Pos(start.line, ch, sticky)
+      }
+    }
+
+    // Case 3: Could not move within this bidi part in this visual line, so leave
+    // the current bidi part
+
+    var searchInVisualLine = function (partPos, dir, wrappedLineExtent) {
+      var getRes = function (ch, moveInStorageOrder) { return moveInStorageOrder
+        ? new Pos(start.line, mv(ch, 1), "before")
+        : new Pos(start.line, ch, "after"); };
+
+      for (; partPos >= 0 && partPos < bidi.length; partPos += dir) {
+        var part = bidi[partPos];
+        var moveInStorageOrder = (dir > 0) == (part.level != 1);
+        var ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1);
+        if (part.from <= ch && ch < part.to) { return getRes(ch, moveInStorageOrder) }
+        ch = moveInStorageOrder ? part.from : mv(part.to, -1);
+        if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) { return getRes(ch, moveInStorageOrder) }
+      }
+    };
+
+    // Case 3a: Look for other bidi parts on the same visual line
+    var res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent);
+    if (res) { return res }
+
+    // Case 3b: Look for other bidi parts on the next visual line
+    var nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1);
+    if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) {
+      res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh));
+      if (res) { return res }
+    }
+
+    // Case 4: Nowhere to move
+    return null
+  }
+
+  // Commands are parameter-less actions that can be performed on an
+  // editor, mostly used for keybindings.
+  var commands = {
+    selectAll: selectAll,
+    singleSelection: function (cm) { return cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); },
+    killLine: function (cm) { return deleteNearSelection(cm, function (range) {
+      if (range.empty()) {
+        var len = getLine(cm.doc, range.head.line).text.length;
+        if (range.head.ch == len && range.head.line < cm.lastLine())
+          { return {from: range.head, to: Pos(range.head.line + 1, 0)} }
+        else
+          { return {from: range.head, to: Pos(range.head.line, len)} }
+      } else {
+        return {from: range.from(), to: range.to()}
+      }
+    }); },
+    deleteLine: function (cm) { return deleteNearSelection(cm, function (range) { return ({
+      from: Pos(range.from().line, 0),
+      to: clipPos(cm.doc, Pos(range.to().line + 1, 0))
+    }); }); },
+    delLineLeft: function (cm) { return deleteNearSelection(cm, function (range) { return ({
+      from: Pos(range.from().line, 0), to: range.from()
+    }); }); },
+    delWrappedLineLeft: function (cm) { return deleteNearSelection(cm, function (range) {
+      var top = cm.charCoords(range.head, "div").top + 5;
+      var leftPos = cm.coordsChar({left: 0, top: top}, "div");
+      return {from: leftPos, to: range.from()}
+    }); },
+    delWrappedLineRight: function (cm) { return deleteNearSelection(cm, function (range) {
+      var top = cm.charCoords(range.head, "div").top + 5;
+      var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
+      return {from: range.from(), to: rightPos }
+    }); },
+    undo: function (cm) { return cm.undo(); },
+    redo: function (cm) { return cm.redo(); },
+    undoSelection: function (cm) { return cm.undoSelection(); },
+    redoSelection: function (cm) { return cm.redoSelection(); },
+    goDocStart: function (cm) { return cm.extendSelection(Pos(cm.firstLine(), 0)); },
+    goDocEnd: function (cm) { return cm.extendSelection(Pos(cm.lastLine())); },
+    goLineStart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStart(cm, range.head.line); },
+      {origin: "+move", bias: 1}
+    ); },
+    goLineStartSmart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStartSmart(cm, range.head); },
+      {origin: "+move", bias: 1}
+    ); },
+    goLineEnd: function (cm) { return cm.extendSelectionsBy(function (range) { return lineEnd(cm, range.head.line); },
+      {origin: "+move", bias: -1}
+    ); },
+    goLineRight: function (cm) { return cm.extendSelectionsBy(function (range) {
+      var top = cm.cursorCoords(range.head, "div").top + 5;
+      return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
+    }, sel_move); },
+    goLineLeft: function (cm) { return cm.extendSelectionsBy(function (range) {
+      var top = cm.cursorCoords(range.head, "div").top + 5;
+      return cm.coordsChar({left: 0, top: top}, "div")
+    }, sel_move); },
+    goLineLeftSmart: function (cm) { return cm.extendSelectionsBy(function (range) {
+      var top = cm.cursorCoords(range.head, "div").top + 5;
+      var pos = cm.coordsChar({left: 0, top: top}, "div");
+      if (pos.ch < cm.getLine(pos.line).search(/\S/)) { return lineStartSmart(cm, range.head) }
+      return pos
+    }, sel_move); },
+    goLineUp: function (cm) { return cm.moveV(-1, "line"); },
+    goLineDown: function (cm) { return cm.moveV(1, "line"); },
+    goPageUp: function (cm) { return cm.moveV(-1, "page"); },
+    goPageDown: function (cm) { return cm.moveV(1, "page"); },
+    goCharLeft: function (cm) { return cm.moveH(-1, "char"); },
+    goCharRight: function (cm) { return cm.moveH(1, "char"); },
+    goColumnLeft: function (cm) { return cm.moveH(-1, "column"); },
+    goColumnRight: function (cm) { return cm.moveH(1, "column"); },
+    goWordLeft: function (cm) { return cm.moveH(-1, "word"); },
+    goGroupRight: function (cm) { return cm.moveH(1, "group"); },
+    goGroupLeft: function (cm) { return cm.moveH(-1, "group"); },
+    goWordRight: function (cm) { return cm.moveH(1, "word"); },
+    delCharBefore: function (cm) { return cm.deleteH(-1, "char"); },
+    delCharAfter: function (cm) { return cm.deleteH(1, "char"); },
+    delWordBefore: function (cm) { return cm.deleteH(-1, "word"); },
+    delWordAfter: function (cm) { return cm.deleteH(1, "word"); },
+    delGroupBefore: function (cm) { return cm.deleteH(-1, "group"); },
+    delGroupAfter: function (cm) { return cm.deleteH(1, "group"); },
+    indentAuto: function (cm) { return cm.indentSelection("smart"); },
+    indentMore: function (cm) { return cm.indentSelection("add"); },
+    indentLess: function (cm) { return cm.indentSelection("subtract"); },
+    insertTab: function (cm) { return cm.replaceSelection("\t"); },
+    insertSoftTab: function (cm) {
+      var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize;
+      for (var i = 0; i < ranges.length; i++) {
+        var pos = ranges[i].from();
+        var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize);
+        spaces.push(spaceStr(tabSize - col % tabSize));
+      }
+      cm.replaceSelections(spaces);
+    },
+    defaultTab: function (cm) {
+      if (cm.somethingSelected()) { cm.indentSelection("add"); }
+      else { cm.execCommand("insertTab"); }
+    },
+    // Swap the two chars left and right of each selection's head.
+    // Move cursor behind the two swapped characters afterwards.
+    //
+    // Doesn't consider line feeds a character.
+    // Doesn't scan more than one line above to find a character.
+    // Doesn't do anything on an empty line.
+    // Doesn't do anything with non-empty selections.
+    transposeChars: function (cm) { return runInOp(cm, function () {
+      var ranges = cm.listSelections(), newSel = [];
+      for (var i = 0; i < ranges.length; i++) {
+        if (!ranges[i].empty()) { continue }
+        var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text;
+        if (line) {
+          if (cur.ch == line.length) { cur = new Pos(cur.line, cur.ch - 1); }
+          if (cur.ch > 0) {
+            cur = new Pos(cur.line, cur.ch + 1);
+            cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
+                            Pos(cur.line, cur.ch - 2), cur, "+transpose");
+          } else if (cur.line > cm.doc.first) {
+            var prev = getLine(cm.doc, cur.line - 1).text;
+            if (prev) {
+              cur = new Pos(cur.line, 1);
+              cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
+                              prev.charAt(prev.length - 1),
+                              Pos(cur.line - 1, prev.length - 1), cur, "+transpose");
+            }
+          }
+        }
+        newSel.push(new Range(cur, cur));
+      }
+      cm.setSelections(newSel);
+    }); },
+    newlineAndIndent: function (cm) { return runInOp(cm, function () {
+      var sels = cm.listSelections();
+      for (var i = sels.length - 1; i >= 0; i--)
+        { cm.replaceRange(cm.doc.lineSeparator(), sels[i].anchor, sels[i].head, "+input"); }
+      sels = cm.listSelections();
+      for (var i$1 = 0; i$1 < sels.length; i$1++)
+        { cm.indentLine(sels[i$1].from().line, null, true); }
+      ensureCursorVisible(cm);
+    }); },
+    openLine: function (cm) { return cm.replaceSelection("\n", "start"); },
+    toggleOverwrite: function (cm) { return cm.toggleOverwrite(); }
+  };
+
+
+  function lineStart(cm, lineN) {
+    var line = getLine(cm.doc, lineN);
+    var visual = visualLine(line);
+    if (visual != line) { lineN = lineNo(visual); }
+    return endOfLine(true, cm, visual, lineN, 1)
+  }
+  function lineEnd(cm, lineN) {
+    var line = getLine(cm.doc, lineN);
+    var visual = visualLineEnd(line);
+    if (visual != line) { lineN = lineNo(visual); }
+    return endOfLine(true, cm, line, lineN, -1)
+  }
+  function lineStartSmart(cm, pos) {
+    var start = lineStart(cm, pos.line);
+    var line = getLine(cm.doc, start.line);
+    var order = getOrder(line, cm.doc.direction);
+    if (!order || order[0].level == 0) {
+      var firstNonWS = Math.max(0, line.text.search(/\S/));
+      var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch;
+      return Pos(start.line, inWS ? 0 : firstNonWS, start.sticky)
+    }
+    return start
+  }
+
+  // Run a handler that was bound to a key.
+  function doHandleBinding(cm, bound, dropShift) {
+    if (typeof bound == "string") {
+      bound = commands[bound];
+      if (!bound) { return false }
+    }
+    // Ensure previous input has been read, so that the handler sees a
+    // consistent view of the document
+    cm.display.input.ensurePolled();
+    var prevShift = cm.display.shift, done = false;
+    try {
+      if (cm.isReadOnly()) { cm.state.suppressEdits = true; }
+      if (dropShift) { cm.display.shift = false; }
+      done = bound(cm) != Pass;
+    } finally {
+      cm.display.shift = prevShift;
+      cm.state.suppressEdits = false;
+    }
+    return done
+  }
+
+  function lookupKeyForEditor(cm, name, handle) {
+    for (var i = 0; i < cm.state.keyMaps.length; i++) {
+      var result = lookupKey(name, cm.state.keyMaps[i], handle, cm);
+      if (result) { return result }
+    }
+    return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
+      || lookupKey(name, cm.options.keyMap, handle, cm)
+  }
+
+  // Note that, despite the name, this function is also used to check
+  // for bound mouse clicks.
+
+  var stopSeq = new Delayed;
+
+  function dispatchKey(cm, name, e, handle) {
+    var seq = cm.state.keySeq;
+    if (seq) {
+      if (isModifierKey(name)) { return "handled" }
+      if (/\'$/.test(name))
+        { cm.state.keySeq = null; }
+      else
+        { stopSeq.set(50, function () {
+          if (cm.state.keySeq == seq) {
+            cm.state.keySeq = null;
+            cm.display.input.reset();
+          }
+        }); }
+      if (dispatchKeyInner(cm, seq + " " + name, e, handle)) { return true }
+    }
+    return dispatchKeyInner(cm, name, e, handle)
+  }
+
+  function dispatchKeyInner(cm, name, e, handle) {
+    var result = lookupKeyForEditor(cm, name, handle);
+
+    if (result == "multi")
+      { cm.state.keySeq = name; }
+    if (result == "handled")
+      { signalLater(cm, "keyHandled", cm, name, e); }
+
+    if (result == "handled" || result == "multi") {
+      e_preventDefault(e);
+      restartBlink(cm);
+    }
+
+    return !!result
+  }
+
+  // Handle a key from the keydown event.
+  function handleKeyBinding(cm, e) {
+    var name = keyName(e, true);
+    if (!name) { return false }
+
+    if (e.shiftKey && !cm.state.keySeq) {
+      // First try to resolve full name (including 'Shift-'). Failing
+      // that, see if there is a cursor-motion command (starting with
+      // 'go') bound to the keyname without 'Shift-'.
+      return dispatchKey(cm, "Shift-" + name, e, function (b) { return doHandleBinding(cm, b, true); })
+          || dispatchKey(cm, name, e, function (b) {
+               if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
+                 { return doHandleBinding(cm, b) }
+             })
+    } else {
+      return dispatchKey(cm, name, e, function (b) { return doHandleBinding(cm, b); })
+    }
+  }
+
+  // Handle a key from the keypress event
+  function handleCharBinding(cm, e, ch) {
+    return dispatchKey(cm, "'" + ch + "'", e, function (b) { return doHandleBinding(cm, b, true); })
+  }
+
+  var lastStoppedKey = null;
+  function onKeyDown(e) {
+    var cm = this;
+    cm.curOp.focus = activeElt();
+    if (signalDOMEvent(cm, e)) { return }
+    // IE does strange things with escape.
+    if (ie && ie_version < 11 && e.keyCode == 27) { e.returnValue = false; }
+    var code = e.keyCode;
+    cm.display.shift = code == 16 || e.shiftKey;
+    var handled = handleKeyBinding(cm, e);
+    if (presto) {
+      lastStoppedKey = handled ? code : null;
+      // Opera has no cut event... we try to at least catch the key combo
+      if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
+        { cm.replaceSelection("", null, "cut"); }
+    }
+
+    // Turn mouse into crosshair when Alt is held on Mac.
+    if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
+      { showCrossHair(cm); }
+  }
+
+  function showCrossHair(cm) {
+    var lineDiv = cm.display.lineDiv;
+    addClass(lineDiv, "CodeMirror-crosshair");
+
+    function up(e) {
+      if (e.keyCode == 18 || !e.altKey) {
+        rmClass(lineDiv, "CodeMirror-crosshair");
+        off(document, "keyup", up);
+        off(document, "mouseover", up);
+      }
+    }
+    on(document, "keyup", up);
+    on(document, "mouseover", up);
+  }
+
+  function onKeyUp(e) {
+    if (e.keyCode == 16) { this.doc.sel.shift = false; }
+    signalDOMEvent(this, e);
+  }
+
+  function onKeyPress(e) {
+    var cm = this;
+    if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) { return }
+    var keyCode = e.keyCode, charCode = e.charCode;
+    if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return}
+    if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) { return }
+    var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
+    // Some browsers fire keypress events for backspace
+    if (ch == "\x08") { return }
+    if (handleCharBinding(cm, e, ch)) { return }
+    cm.display.input.onKeyPress(e);
+  }
+
+  var DOUBLECLICK_DELAY = 400;
+
+  var PastClick = function(time, pos, button) {
+    this.time = time;
+    this.pos = pos;
+    this.button = button;
+  };
+
+  PastClick.prototype.compare = function (time, pos, button) {
+    return this.time + DOUBLECLICK_DELAY > time &&
+      cmp(pos, this.pos) == 0 && button == this.button
+  };
+
+  var lastClick, lastDoubleClick;
+  function clickRepeat(pos, button) {
+    var now = +new Date;
+    if (lastDoubleClick && lastDoubleClick.compare(now, pos, button)) {
+      lastClick = lastDoubleClick = null;
+      return "triple"
+    } else if (lastClick && lastClick.compare(now, pos, button)) {
+      lastDoubleClick = new PastClick(now, pos, button);
+      lastClick = null;
+      return "double"
+    } else {
+      lastClick = new PastClick(now, pos, button);
+      lastDoubleClick = null;
+      return "single"
+    }
+  }
+
+  // A mouse down can be a single click, double click, triple click,
+  // start of selection drag, start of text drag, new cursor
+  // (ctrl-click), rectangle drag (alt-drag), or xwin
+  // middle-click-paste. Or it might be a click on something we should
+  // not interfere with, such as a scrollbar or widget.
+  function onMouseDown(e) {
+    var cm = this, display = cm.display;
+    if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) { return }
+    display.input.ensurePolled();
+    display.shift = e.shiftKey;
+
+    if (eventInWidget(display, e)) {
+      if (!webkit) {
+        // Briefly turn off draggability, to allow widgets to do
+        // normal dragging things.
+        display.scroller.draggable = false;
+        setTimeout(function () { return display.scroller.draggable = true; }, 100);
+      }
+      return
+    }
+    if (clickInGutter(cm, e)) { return }
+    var pos = posFromMouse(cm, e), button = e_button(e), repeat = pos ? clickRepeat(pos, button) : "single";
+    window.focus();
+
+    // #3261: make sure, that we're not starting a second selection
+    if (button == 1 && cm.state.selectingText)
+      { cm.state.selectingText(e); }
+
+    if (pos && handleMappedButton(cm, button, pos, repeat, e)) { return }
+
+    if (button == 1) {
+      if (pos) { leftButtonDown(cm, pos, repeat, e); }
+      else if (e_target(e) == display.scroller) { e_preventDefault(e); }
+    } else if (button == 2) {
+      if (pos) { extendSelection(cm.doc, pos); }
+      setTimeout(function () { return display.input.focus(); }, 20);
+    } else if (button == 3) {
+      if (captureRightClick) { cm.display.input.onContextMenu(e); }
+      else { delayBlurEvent(cm); }
+    }
+  }
+
+  function handleMappedButton(cm, button, pos, repeat, event) {
+    var name = "Click";
+    if (repeat == "double") { name = "Double" + name; }
+    else if (repeat == "triple") { name = "Triple" + name; }
+    name = (button == 1 ? "Left" : button == 2 ? "Middle" : "Right") + name;
+
+    return dispatchKey(cm,  addModifierNames(name, event), event, function (bound) {
+      if (typeof bound == "string") { bound = commands[bound]; }
+      if (!bound) { return false }
+      var done = false;
+      try {
+        if (cm.isReadOnly()) { cm.state.suppressEdits = true; }
+        done = bound(cm, pos) != Pass;
+      } finally {
+        cm.state.suppressEdits = false;
+      }
+      return done
+    })
+  }
+
+  function configureMouse(cm, repeat, event) {
+    var option = cm.getOption("configureMouse");
+    var value = option ? option(cm, repeat, event) : {};
+    if (value.unit == null) {
+      var rect = chromeOS ? event.shiftKey && event.metaKey : event.altKey;
+      value.unit = rect ? "rectangle" : repeat == "single" ? "char" : repeat == "double" ? "word" : "line";
+    }
+    if (value.extend == null || cm.doc.extend) { value.extend = cm.doc.extend || event.shiftKey; }
+    if (value.addNew == null) { value.addNew = mac ? event.metaKey : event.ctrlKey; }
+    if (value.moveOnDrag == null) { value.moveOnDrag = !(mac ? event.altKey : event.ctrlKey); }
+    return value
+  }
+
+  function leftButtonDown(cm, pos, repeat, event) {
+    if (ie) { setTimeout(bind(ensureFocus, cm), 0); }
+    else { cm.curOp.focus = activeElt(); }
+
+    var behavior = configureMouse(cm, repeat, event);
+
+    var sel = cm.doc.sel, contained;
+    if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
+        repeat == "single" && (contained = sel.contains(pos)) > -1 &&
+        (cmp((contained = sel.ranges[contained]).from(), pos) < 0 || pos.xRel > 0) &&
+        (cmp(contained.to(), pos) > 0 || pos.xRel < 0))
+      { leftButtonStartDrag(cm, event, pos, behavior); }
+    else
+      { leftButtonSelect(cm, event, pos, behavior); }
+  }
+
+  // Start a text drag. When it ends, see if any dragging actually
+  // happen, and treat as a click if it didn't.
+  function leftButtonStartDrag(cm, event, pos, behavior) {
+    var display = cm.display, moved = false;
+    var dragEnd = operation(cm, function (e) {
+      if (webkit) { display.scroller.draggable = false; }
+      cm.state.draggingText = false;
+      off(display.wrapper.ownerDocument, "mouseup", dragEnd);
+      off(display.wrapper.ownerDocument, "mousemove", mouseMove);
+      off(display.scroller, "dragstart", dragStart);
+      off(display.scroller, "drop", dragEnd);
+      if (!moved) {
+        e_preventDefault(e);
+        if (!behavior.addNew)
+          { extendSelection(cm.doc, pos, null, null, behavior.extend); }
+        // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
+        if (webkit || ie && ie_version == 9)
+          { setTimeout(function () {display.wrapper.ownerDocument.body.focus(); display.input.focus();}, 20); }
+        else
+          { display.input.focus(); }
+      }
+    });
+    var mouseMove = function(e2) {
+      moved = moved || Math.abs(event.clientX - e2.clientX) + Math.abs(event.clientY - e2.clientY) >= 10;
+    };
+    var dragStart = function () { return moved = true; };
+    // Let the drag handler handle this.
+    if (webkit) { display.scroller.draggable = true; }
+    cm.state.draggingText = dragEnd;
+    dragEnd.copy = !behavior.moveOnDrag;
+    // IE's approach to draggable
+    if (display.scroller.dragDrop) { display.scroller.dragDrop(); }
+    on(display.wrapper.ownerDocument, "mouseup", dragEnd);
+    on(display.wrapper.ownerDocument, "mousemove", mouseMove);
+    on(display.scroller, "dragstart", dragStart);
+    on(display.scroller, "drop", dragEnd);
+
+    delayBlurEvent(cm);
+    setTimeout(function () { return display.input.focus(); }, 20);
+  }
+
+  function rangeForUnit(cm, pos, unit) {
+    if (unit == "char") { return new Range(pos, pos) }
+    if (unit == "word") { return cm.findWordAt(pos) }
+    if (unit == "line") { return new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
+    var result = unit(cm, pos);
+    return new Range(result.from, result.to)
+  }
+
+  // Normal selection, as opposed to text dragging.
+  function leftButtonSelect(cm, event, start, behavior) {
+    var display = cm.display, doc = cm.doc;
+    e_preventDefault(event);
+
+    var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges;
+    if (behavior.addNew && !behavior.extend) {
+      ourIndex = doc.sel.contains(start);
+      if (ourIndex > -1)
+        { ourRange = ranges[ourIndex]; }
+      else
+        { ourRange = new Range(start, start); }
+    } else {
+      ourRange = doc.sel.primary();
+      ourIndex = doc.sel.primIndex;
+    }
+
+    if (behavior.unit == "rectangle") {
+      if (!behavior.addNew) { ourRange = new Range(start, start); }
+      start = posFromMouse(cm, event, true, true);
+      ourIndex = -1;
+    } else {
+      var range$$1 = rangeForUnit(cm, start, behavior.unit);
+      if (behavior.extend)
+        { ourRange = extendRange(ourRange, range$$1.anchor, range$$1.head, behavior.extend); }
+      else
+        { ourRange = range$$1; }
+    }
+
+    if (!behavior.addNew) {
+      ourIndex = 0;
+      setSelection(doc, new Selection([ourRange], 0), sel_mouse);
+      startSel = doc.sel;
+    } else if (ourIndex == -1) {
+      ourIndex = ranges.length;
+      setSelection(doc, normalizeSelection(cm, ranges.concat([ourRange]), ourIndex),
+                   {scroll: false, origin: "*mouse"});
+    } else if (ranges.length > 1 && ranges[ourIndex].empty() && behavior.unit == "char" && !behavior.extend) {
+      setSelection(doc, normalizeSelection(cm, ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
+                   {scroll: false, origin: "*mouse"});
+      startSel = doc.sel;
+    } else {
+      replaceOneSelection(doc, ourIndex, ourRange, sel_mouse);
+    }
+
+    var lastPos = start;
+    function extendTo(pos) {
+      if (cmp(lastPos, pos) == 0) { return }
+      lastPos = pos;
+
+      if (behavior.unit == "rectangle") {
+        var ranges = [], tabSize = cm.options.tabSize;
+        var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize);
+        var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize);
+        var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol);
+        for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
+             line <= end; line++) {
+          var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize);
+          if (left == right)
+            { ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))); }
+          else if (text.length > leftPos)
+            { ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize)))); }
+        }
+        if (!ranges.length) { ranges.push(new Range(start, start)); }
+        setSelection(doc, normalizeSelection(cm, startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
+                     {origin: "*mouse", scroll: false});
+        cm.scrollIntoView(pos);
+      } else {
+        var oldRange = ourRange;
+        var range$$1 = rangeForUnit(cm, pos, behavior.unit);
+        var anchor = oldRange.anchor, head;
+        if (cmp(range$$1.anchor, anchor) > 0) {
+          head = range$$1.head;
+          anchor = minPos(oldRange.from(), range$$1.anchor);
+        } else {
+          head = range$$1.anchor;
+          anchor = maxPos(oldRange.to(), range$$1.head);
+        }
+        var ranges$1 = startSel.ranges.slice(0);
+        ranges$1[ourIndex] = bidiSimplify(cm, new Range(clipPos(doc, anchor), head));
+        setSelection(doc, normalizeSelection(cm, ranges$1, ourIndex), sel_mouse);
+      }
+    }
+
+    var editorSize = display.wrapper.getBoundingClientRect();
+    // Used to ensure timeout re-tries don't fire when another extend
+    // happened in the meantime (clearTimeout isn't reliable -- at
+    // least on Chrome, the timeouts still happen even when cleared,
+    // if the clear happens after their scheduled firing time).
+    var counter = 0;
+
+    function extend(e) {
+      var curCount = ++counter;
+      var cur = posFromMouse(cm, e, true, behavior.unit == "rectangle");
+      if (!cur) { return }
+      if (cmp(cur, lastPos) != 0) {
+        cm.curOp.focus = activeElt();
+        extendTo(cur);
+        var visible = visibleLines(display, doc);
+        if (cur.line >= visible.to || cur.line < visible.from)
+          { setTimeout(operation(cm, function () {if (counter == curCount) { extend(e); }}), 150); }
+      } else {
+        var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
+        if (outside) { setTimeout(operation(cm, function () {
+          if (counter != curCount) { return }
+          display.scroller.scrollTop += outside;
+          extend(e);
+        }), 50); }
+      }
+    }
+
+    function done(e) {
+      cm.state.selectingText = false;
+      counter = Infinity;
+      // If e is null or undefined we interpret this as someone trying
+      // to explicitly cancel the selection rather than the user
+      // letting go of the mouse button.
+      if (e) {
+        e_preventDefault(e);
+        display.input.focus();
+      }
+      off(display.wrapper.ownerDocument, "mousemove", move);
+      off(display.wrapper.ownerDocument, "mouseup", up);
+      doc.history.lastSelOrigin = null;
+    }
+
+    var move = operation(cm, function (e) {
+      if (e.buttons === 0 || !e_button(e)) { done(e); }
+      else { extend(e); }
+    });
+    var up = operation(cm, done);
+    cm.state.selectingText = up;
+    on(display.wrapper.ownerDocument, "mousemove", move);
+    on(display.wrapper.ownerDocument, "mouseup", up);
+  }
+
+  // Used when mouse-selecting to adjust the anchor to the proper side
+  // of a bidi jump depending on the visual position of the head.
+  function bidiSimplify(cm, range$$1) {
+    var anchor = range$$1.anchor;
+    var head = range$$1.head;
+    var anchorLine = getLine(cm.doc, anchor.line);
+    if (cmp(anchor, head) == 0 && anchor.sticky == head.sticky) { return range$$1 }
+    var order = getOrder(anchorLine);
+    if (!order) { return range$$1 }
+    var index = getBidiPartAt(order, anchor.ch, anchor.sticky), part = order[index];
+    if (part.from != anchor.ch && part.to != anchor.ch) { return range$$1 }
+    var boundary = index + ((part.from == anchor.ch) == (part.level != 1) ? 0 : 1);
+    if (boundary == 0 || boundary == order.length) { return range$$1 }
+
+    // Compute the relative visual position of the head compared to the
+    // anchor (<0 is to the left, >0 to the right)
+    var leftSide;
+    if (head.line != anchor.line) {
+      leftSide = (head.line - anchor.line) * (cm.doc.direction == "ltr" ? 1 : -1) > 0;
+    } else {
+      var headIndex = getBidiPartAt(order, head.ch, head.sticky);
+      var dir = headIndex - index || (head.ch - anchor.ch) * (part.level == 1 ? -1 : 1);
+      if (headIndex == boundary - 1 || headIndex == boundary)
+        { leftSide = dir < 0; }
+      else
+        { leftSide = dir > 0; }
+    }
+
+    var usePart = order[boundary + (leftSide ? -1 : 0)];
+    var from = leftSide == (usePart.level == 1);
+    var ch = from ? usePart.from : usePart.to, sticky = from ? "after" : "before";
+    return anchor.ch == ch && anchor.sticky == sticky ? range$$1 : new Range(new Pos(anchor.line, ch, sticky), head)
+  }
+
+
+  // Determines whether an event happened in the gutter, and fires the
+  // handlers for the corresponding event.
+  function gutterEvent(cm, e, type, prevent) {
+    var mX, mY;
+    if (e.touches) {
+      mX = e.touches[0].clientX;
+      mY = e.touches[0].clientY;
+    } else {
+      try { mX = e.clientX; mY = e.clientY; }
+      catch(e) { return false }
+    }
+    if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) { return false }
+    if (prevent) { e_preventDefault(e); }
+
+    var display = cm.display;
+    var lineBox = display.lineDiv.getBoundingClientRect();
+
+    if (mY > lineBox.bottom || !hasHandler(cm, type)) { return e_defaultPrevented(e) }
+    mY -= lineBox.top - display.viewOffset;
+
+    for (var i = 0; i < cm.display.gutterSpecs.length; ++i) {
+      var g = display.gutters.childNodes[i];
+      if (g && g.getBoundingClientRect().right >= mX) {
+        var line = lineAtHeight(cm.doc, mY);
+        var gutter = cm.display.gutterSpecs[i];
+        signal(cm, type, cm, line, gutter.className, e);
+        return e_defaultPrevented(e)
+      }
+    }
+  }
+
+  function clickInGutter(cm, e) {
+    return gutterEvent(cm, e, "gutterClick", true)
+  }
+
+  // CONTEXT MENU HANDLING
+
+  // To make the context menu work, we need to briefly unhide the
+  // textarea (making it as unobtrusive as possible) to let the
+  // right-click take effect on it.
+  function onContextMenu(cm, e) {
+    if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) { return }
+    if (signalDOMEvent(cm, e, "contextmenu")) { return }
+    if (!captureRightClick) { cm.display.input.onContextMenu(e); }
+  }
+
+  function contextMenuInGutter(cm, e) {
+    if (!hasHandler(cm, "gutterContextMenu")) { return false }
+    return gutterEvent(cm, e, "gutterContextMenu", false)
+  }
+
+  function themeChanged(cm) {
+    cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
+      cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
+    clearCaches(cm);
+  }
+
+  var Init = {toString: function(){return "CodeMirror.Init"}};
+
+  var defaults = {};
+  var optionHandlers = {};
+
+  function defineOptions(CodeMirror) {
+    var optionHandlers = CodeMirror.optionHandlers;
+
+    function option(name, deflt, handle, notOnInit) {
+      CodeMirror.defaults[name] = deflt;
+      if (handle) { optionHandlers[name] =
+        notOnInit ? function (cm, val, old) {if (old != Init) { handle(cm, val, old); }} : handle; }
+    }
+
+    CodeMirror.defineOption = option;
+
+    // Passed to option handlers when there is no old value.
+    CodeMirror.Init = Init;
+
+    // These two are, on init, called from the constructor because they
+    // have to be initialized before the editor can start at all.
+    option("value", "", function (cm, val) { return cm.setValue(val); }, true);
+    option("mode", null, function (cm, val) {
+      cm.doc.modeOption = val;
+      loadMode(cm);
+    }, true);
+
+    option("indentUnit", 2, loadMode, true);
+    option("indentWithTabs", false);
+    option("smartIndent", true);
+    option("tabSize", 4, function (cm) {
+      resetModeState(cm);
+      clearCaches(cm);
+      regChange(cm);
+    }, true);
+
+    option("lineSeparator", null, function (cm, val) {
+      cm.doc.lineSep = val;
+      if (!val) { return }
+      var newBreaks = [], lineNo = cm.doc.first;
+      cm.doc.iter(function (line) {
+        for (var pos = 0;;) {
+          var found = line.text.indexOf(val, pos);
+          if (found == -1) { break }
+          pos = found + val.length;
+          newBreaks.push(Pos(lineNo, found));
+        }
+        lineNo++;
+      });
+      for (var i = newBreaks.length - 1; i >= 0; i--)
+        { replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length)); }
+    });
+    option("specialChars", /[\u0000-\u001f\u007f-\u009f\u00ad\u061c\u200b-\u200f\u2028\u2029\ufeff]/g, function (cm, val, old) {
+      cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
+      if (old != Init) { cm.refresh(); }
+    });
+    option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function (cm) { return cm.refresh(); }, true);
+    option("electricChars", true);
+    option("inputStyle", mobile ? "contenteditable" : "textarea", function () {
+      throw new Error("inputStyle can not (yet) be changed in a running editor") // FIXME
+    }, true);
+    option("spellcheck", false, function (cm, val) { return cm.getInputField().spellcheck = val; }, true);
+    option("autocorrect", false, function (cm, val) { return cm.getInputField().autocorrect = val; }, true);
+    option("autocapitalize", false, function (cm, val) { return cm.getInputField().autocapitalize = val; }, true);
+    option("rtlMoveVisually", !windows);
+    option("wholeLineUpdateBefore", true);
+
+    option("theme", "default", function (cm) {
+      themeChanged(cm);
+      updateGutters(cm);
+    }, true);
+    option("keyMap", "default", function (cm, val, old) {
+      var next = getKeyMap(val);
+      var prev = old != Init && getKeyMap(old);
+      if (prev && prev.detach) { prev.detach(cm, next); }
+      if (next.attach) { next.attach(cm, prev || null); }
+    });
+    option("extraKeys", null);
+    option("configureMouse", null);
+
+    option("lineWrapping", false, wrappingChanged, true);
+    option("gutters", [], function (cm, val) {
+      cm.display.gutterSpecs = getGutters(val, cm.options.lineNumbers);
+      updateGutters(cm);
+    }, true);
+    option("fixedGutter", true, function (cm, val) {
+      cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
+      cm.refresh();
+    }, true);
+    option("coverGutterNextToScrollbar", false, function (cm) { return updateScrollbars(cm); }, true);
+    option("scrollbarStyle", "native", function (cm) {
+      initScrollbars(cm);
+      updateScrollbars(cm);
+      cm.display.scrollbars.setScrollTop(cm.doc.scrollTop);
+      cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft);
+    }, true);
+    option("lineNumbers", false, function (cm, val) {
+      cm.display.gutterSpecs = getGutters(cm.options.gutters, val);
+      updateGutters(cm);
+    }, true);
+    option("firstLineNumber", 1, updateGutters, true);
+    option("lineNumberFormatter", function (integer) { return integer; }, updateGutters, true);
+    option("showCursorWhenSelecting", false, updateSelection, true);
+
+    option("resetSelectionOnContextMenu", true);
+    option("lineWiseCopyCut", true);
+    option("pasteLinesPerSelection", true);
+    option("selectionsMayTouch", false);
+
+    option("readOnly", false, function (cm, val) {
+      if (val == "nocursor") {
+        onBlur(cm);
+        cm.display.input.blur();
+      }
+      cm.display.input.readOnlyChanged(val);
+    });
+    option("disableInput", false, function (cm, val) {if (!val) { cm.display.input.reset(); }}, true);
+    option("dragDrop", true, dragDropChanged);
+    option("allowDropFileTypes", null);
+
+    option("cursorBlinkRate", 530);
+    option("cursorScrollMargin", 0);
+    option("cursorHeight", 1, updateSelection, true);
+    option("singleCursorHeightPerLine", true, updateSelection, true);
+    option("workTime", 100);
+    option("workDelay", 100);
+    option("flattenSpans", true, resetModeState, true);
+    option("addModeClass", false, resetModeState, true);
+    option("pollInterval", 100);
+    option("undoDepth", 200, function (cm, val) { return cm.doc.history.undoDepth = val; });
+    option("historyEventDelay", 1250);
+    option("viewportMargin", 10, function (cm) { return cm.refresh(); }, true);
+    option("maxHighlightLength", 10000, resetModeState, true);
+    option("moveInputWithCursor", true, function (cm, val) {
+      if (!val) { cm.display.input.resetPosition(); }
+    });
+
+    option("tabindex", null, function (cm, val) { return cm.display.input.getField().tabIndex = val || ""; });
+    option("autofocus", null);
+    option("direction", "ltr", function (cm, val) { return cm.doc.setDirection(val); }, true);
+    option("phrases", null);
+  }
+
+  function dragDropChanged(cm, value, old) {
+    var wasOn = old && old != Init;
+    if (!value != !wasOn) {
+      var funcs = cm.display.dragFunctions;
+      var toggle = value ? on : off;
+      toggle(cm.display.scroller, "dragstart", funcs.start);
+      toggle(cm.display.scroller, "dragenter", funcs.enter);
+      toggle(cm.display.scroller, "dragover", funcs.over);
+      toggle(cm.display.scroller, "dragleave", funcs.leave);
+      toggle(cm.display.scroller, "drop", funcs.drop);
+    }
+  }
+
+  function wrappingChanged(cm) {
+    if (cm.options.lineWrapping) {
+      addClass(cm.display.wrapper, "CodeMirror-wrap");
+      cm.display.sizer.style.minWidth = "";
+      cm.display.sizerWidth = null;
+    } else {
+      rmClass(cm.display.wrapper, "CodeMirror-wrap");
+      findMaxLine(cm);
+    }
+    estimateLineHeights(cm);
+    regChange(cm);
+    clearCaches(cm);
+    setTimeout(function () { return updateScrollbars(cm); }, 100);
+  }
+
+  // A CodeMirror instance represents an editor. This is the object
+  // that user code is usually dealing with.
+
+  function CodeMirror(place, options) {
+    var this$1 = this;
+
+    if (!(this instanceof CodeMirror)) { return new CodeMirror(place, options) }
+
+    this.options = options = options ? copyObj(options) : {};
+    // Determine effective options based on given values and defaults.
+    copyObj(defaults, options, false);
+
+    var doc = options.value;
+    if (typeof doc == "string") { doc = new Doc(doc, options.mode, null, options.lineSeparator, options.direction); }
+    else if (options.mode) { doc.modeOption = options.mode; }
+    this.doc = doc;
+
+    var input = new CodeMirror.inputStyles[options.inputStyle](this);
+    var display = this.display = new Display(place, doc, input, options);
+    display.wrapper.CodeMirror = this;
+    themeChanged(this);
+    if (options.lineWrapping)
+      { this.display.wrapper.className += " CodeMirror-wrap"; }
+    initScrollbars(this);
+
+    this.state = {
+      keyMaps: [],  // stores maps added by addKeyMap
+      overlays: [], // highlighting overlays, as added by addOverlay
+      modeGen: 0,   // bumped when mode/overlay changes, used to invalidate highlighting info
+      overwrite: false,
+      delayingBlurEvent: false,
+      focused: false,
+      suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
+      pasteIncoming: -1, cutIncoming: -1, // help recognize paste/cut edits in input.poll
+      selectingText: false,
+      draggingText: false,
+      highlight: new Delayed(), // stores highlight worker timeout
+      keySeq: null,  // Unfinished key sequence
+      specialChars: null
+    };
+
+    if (options.autofocus && !mobile) { display.input.focus(); }
+
+    // Override magic textarea content restore that IE sometimes does
+    // on our hidden textarea on reload
+    if (ie && ie_version < 11) { setTimeout(function () { return this$1.display.input.reset(true); }, 20); }
+
+    registerEventHandlers(this);
+    ensureGlobalHandlers();
+
+    startOperation(this);
+    this.curOp.forceUpdate = true;
+    attachDoc(this, doc);
+
+    if ((options.autofocus && !mobile) || this.hasFocus())
+      { setTimeout(bind(onFocus, this), 20); }
+    else
+      { onBlur(this); }
+
+    for (var opt in optionHandlers) { if (optionHandlers.hasOwnProperty(opt))
+      { optionHandlers[opt](this$1, options[opt], Init); } }
+    maybeUpdateLineNumberWidth(this);
+    if (options.finishInit) { options.finishInit(this); }
+    for (var i = 0; i < initHooks.length; ++i) { initHooks[i](this$1); }
+    endOperation(this);
+    // Suppress optimizelegibility in Webkit, since it breaks text
+    // measuring on line wrapping boundaries.
+    if (webkit && options.lineWrapping &&
+        getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
+      { display.lineDiv.style.textRendering = "auto"; }
+  }
+
+  // The default configuration options.
+  CodeMirror.defaults = defaults;
+  // Functions to run when options are changed.
+  CodeMirror.optionHandlers = optionHandlers;
+
+  // Attach the necessary event handlers when initializing the editor
+  function registerEventHandlers(cm) {
+    var d = cm.display;
+    on(d.scroller, "mousedown", operation(cm, onMouseDown));
+    // Older IE's will not fire a second mousedown for a double click
+    if (ie && ie_version < 11)
+      { on(d.scroller, "dblclick", operation(cm, function (e) {
+        if (signalDOMEvent(cm, e)) { return }
+        var pos = posFromMouse(cm, e);
+        if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) { return }
+        e_preventDefault(e);
+        var word = cm.findWordAt(pos);
+        extendSelection(cm.doc, word.anchor, word.head);
+      })); }
+    else
+      { on(d.scroller, "dblclick", function (e) { return signalDOMEvent(cm, e) || e_preventDefault(e); }); }
+    // Some browsers fire contextmenu *after* opening the menu, at
+    // which point we can't mess with it anymore. Context menu is
+    // handled in onMouseDown for these browsers.
+    on(d.scroller, "contextmenu", function (e) { return onContextMenu(cm, e); });
+
+    // Used to suppress mouse event handling when a touch happens
+    var touchFinished, prevTouch = {end: 0};
+    function finishTouch() {
+      if (d.activeTouch) {
+        touchFinished = setTimeout(function () { return d.activeTouch = null; }, 1000);
+        prevTouch = d.activeTouch;
+        prevTouch.end = +new Date;
+      }
+    }
+    function isMouseLikeTouchEvent(e) {
+      if (e.touches.length != 1) { return false }
+      var touch = e.touches[0];
+      return touch.radiusX <= 1 && touch.radiusY <= 1
+    }
+    function farAway(touch, other) {
+      if (other.left == null) { return true }
+      var dx = other.left - touch.left, dy = other.top - touch.top;
+      return dx * dx + dy * dy > 20 * 20
+    }
+    on(d.scroller, "touchstart", function (e) {
+      if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e) && !clickInGutter(cm, e)) {
+        d.input.ensurePolled();
+        clearTimeout(touchFinished);
+        var now = +new Date;
+        d.activeTouch = {start: now, moved: false,
+                         prev: now - prevTouch.end <= 300 ? prevTouch : null};
+        if (e.touches.length == 1) {
+          d.activeTouch.left = e.touches[0].pageX;
+          d.activeTouch.top = e.touches[0].pageY;
+        }
+      }
+    });
+    on(d.scroller, "touchmove", function () {
+      if (d.activeTouch) { d.activeTouch.moved = true; }
+    });
+    on(d.scroller, "touchend", function (e) {
+      var touch = d.activeTouch;
+      if (touch && !eventInWidget(d, e) && touch.left != null &&
+          !touch.moved && new Date - touch.start < 300) {
+        var pos = cm.coordsChar(d.activeTouch, "page"), range;
+        if (!touch.prev || farAway(touch, touch.prev)) // Single tap
+          { range = new Range(pos, pos); }
+        else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
+          { range = cm.findWordAt(pos); }
+        else // Triple tap
+          { range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))); }
+        cm.setSelection(range.anchor, range.head);
+        cm.focus();
+        e_preventDefault(e);
+      }
+      finishTouch();
+    });
+    on(d.scroller, "touchcancel", finishTouch);
+
+    // Sync scrolling between fake scrollbars and real scrollable
+    // area, ensure viewport is updated when scrolling.
+    on(d.scroller, "scroll", function () {
+      if (d.scroller.clientHeight) {
+        updateScrollTop(cm, d.scroller.scrollTop);
+        setScrollLeft(cm, d.scroller.scrollLeft, true);
+        signal(cm, "scroll", cm);
+      }
+    });
+
+    // Listen to wheel events in order to try and update the viewport on time.
+    on(d.scroller, "mousewheel", function (e) { return onScrollWheel(cm, e); });
+    on(d.scroller, "DOMMouseScroll", function (e) { return onScrollWheel(cm, e); });
+
+    // Prevent wrapper from ever scrolling
+    on(d.wrapper, "scroll", function () { return d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
+
+    d.dragFunctions = {
+      enter: function (e) {if (!signalDOMEvent(cm, e)) { e_stop(e); }},
+      over: function (e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e); }},
+      start: function (e) { return onDragStart(cm, e); },
+      drop: operation(cm, onDrop),
+      leave: function (e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm); }}
+    };
+
+    var inp = d.input.getField();
+    on(inp, "keyup", function (e) { return onKeyUp.call(cm, e); });
+    on(inp, "keydown", operation(cm, onKeyDown));
+    on(inp, "keypress", operation(cm, onKeyPress));
+    on(inp, "focus", function (e) { return onFocus(cm, e); });
+    on(inp, "blur", function (e) { return onBlur(cm, e); });
+  }
+
+  var initHooks = [];
+  CodeMirror.defineInitHook = function (f) { return initHooks.push(f); };
+
+  // Indent the given line. The how parameter can be "smart",
+  // "add"/null, "subtract", or "prev". When aggressive is false
+  // (typically set to true for forced single-line indents), empty
+  // lines are not indented, and places where the mode returns Pass
+  // are left alone.
+  function indentLine(cm, n, how, aggressive) {
+    var doc = cm.doc, state;
+    if (how == null) { how = "add"; }
+    if (how == "smart") {
+      // Fall back to "prev" when the mode doesn't have an indentation
+      // method.
+      if (!doc.mode.indent) { how = "prev"; }
+      else { state = getContextBefore(cm, n).state; }
+    }
+
+    var tabSize = cm.options.tabSize;
+    var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
+    if (line.stateAfter) { line.stateAfter = null; }
+    var curSpaceString = line.text.match(/^\s*/)[0], indentation;
+    if (!aggressive && !/\S/.test(line.text)) {
+      indentation = 0;
+      how = "not";
+    } else if (how == "smart") {
+      indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
+      if (indentation == Pass || indentation > 150) {
+        if (!aggressive) { return }
+        how = "prev";
+      }
+    }
+    if (how == "prev") {
+      if (n > doc.first) { indentation = countColumn(getLine(doc, n-1).text, null, tabSize); }
+      else { indentation = 0; }
+    } else if (how == "add") {
+      indentation = curSpace + cm.options.indentUnit;
+    } else if (how == "subtract") {
+      indentation = curSpace - cm.options.indentUnit;
+    } else if (typeof how == "number") {
+      indentation = curSpace + how;
+    }
+    indentation = Math.max(0, indentation);
+
+    var indentString = "", pos = 0;
+    if (cm.options.indentWithTabs)
+      { for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";} }
+    if (pos < indentation) { indentString += spaceStr(indentation - pos); }
+
+    if (indentString != curSpaceString) {
+      replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
+      line.stateAfter = null;
+      return true
+    } else {
+      // Ensure that, if the cursor was in the whitespace at the start
+      // of the line, it is moved to the end of that space.
+      for (var i$1 = 0; i$1 < doc.sel.ranges.length; i$1++) {
+        var range = doc.sel.ranges[i$1];
+        if (range.head.line == n && range.head.ch < curSpaceString.length) {
+          var pos$1 = Pos(n, curSpaceString.length);
+          replaceOneSelection(doc, i$1, new Range(pos$1, pos$1));
+          break
+        }
+      }
+    }
+  }
+
+  // This will be set to a {lineWise: bool, text: [string]} object, so
+  // that, when pasting, we know what kind of selections the copied
+  // text was made out of.
+  var lastCopied = null;
+
+  function setLastCopied(newLastCopied) {
+    lastCopied = newLastCopied;
+  }
+
+  function applyTextInput(cm, inserted, deleted, sel, origin) {
+    var doc = cm.doc;
+    cm.display.shift = false;
+    if (!sel) { sel = doc.sel; }
+
+    var recent = +new Date - 200;
+    var paste = origin == "paste" || cm.state.pasteIncoming > recent;
+    var textLines = splitLinesAuto(inserted), multiPaste = null;
+    // When pasting N lines into N selections, insert one line per selection
+    if (paste && sel.ranges.length > 1) {
+      if (lastCopied && lastCopied.text.join("\n") == inserted) {
+        if (sel.ranges.length % lastCopied.text.length == 0) {
+          multiPaste = [];
+          for (var i = 0; i < lastCopied.text.length; i++)
+            { multiPaste.push(doc.splitLines(lastCopied.text[i])); }
+        }
+      } else if (textLines.length == sel.ranges.length && cm.options.pasteLinesPerSelection) {
+        multiPaste = map(textLines, function (l) { return [l]; });
+      }
+    }
+
+    var updateInput = cm.curOp.updateInput;
+    // Normal behavior is to insert the new text into every selection
+    for (var i$1 = sel.ranges.length - 1; i$1 >= 0; i$1--) {
+      var range$$1 = sel.ranges[i$1];
+      var from = range$$1.from(), to = range$$1.to();
+      if (range$$1.empty()) {
+        if (deleted && deleted > 0) // Handle deletion
+          { from = Pos(from.line, from.ch - deleted); }
+        else if (cm.state.overwrite && !paste) // Handle overwrite
+          { to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)); }
+        else if (paste && lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == inserted)
+          { from = to = Pos(from.line, 0); }
+      }
+      var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i$1 % multiPaste.length] : textLines,
+                         origin: origin || (paste ? "paste" : cm.state.cutIncoming > recent ? "cut" : "+input")};
+      makeChange(cm.doc, changeEvent);
+      signalLater(cm, "inputRead", cm, changeEvent);
+    }
+    if (inserted && !paste)
+      { triggerElectric(cm, inserted); }
+
+    ensureCursorVisible(cm);
+    if (cm.curOp.updateInput < 2) { cm.curOp.updateInput = updateInput; }
+    cm.curOp.typing = true;
+    cm.state.pasteIncoming = cm.state.cutIncoming = -1;
+  }
+
+  function handlePaste(e, cm) {
+    var pasted = e.clipboardData && e.clipboardData.getData("Text");
+    if (pasted) {
+      e.preventDefault();
+      if (!cm.isReadOnly() && !cm.options.disableInput)
+        { runInOp(cm, function () { return applyTextInput(cm, pasted, 0, null, "paste"); }); }
+      return true
+    }
+  }
+
+  function triggerElectric(cm, inserted) {
+    // When an 'electric' character is inserted, immediately trigger a reindent
+    if (!cm.options.electricChars || !cm.options.smartIndent) { return }
+    var sel = cm.doc.sel;
+
+    for (var i = sel.ranges.length - 1; i >= 0; i--) {
+      var range$$1 = sel.ranges[i];
+      if (range$$1.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range$$1.head.line)) { continue }
+      var mode = cm.getModeAt(range$$1.head);
+      var indented = false;
+      if (mode.electricChars) {
+        for (var j = 0; j < mode.electricChars.length; j++)
+          { if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
+            indented = indentLine(cm, range$$1.head.line, "smart");
+            break
+          } }
+      } else if (mode.electricInput) {
+        if (mode.electricInput.test(getLine(cm.doc, range$$1.head.line).text.slice(0, range$$1.head.ch)))
+          { indented = indentLine(cm, range$$1.head.line, "smart"); }
+      }
+      if (indented) { signalLater(cm, "electricInput", cm, range$$1.head.line); }
+    }
+  }
+
+  function copyableRanges(cm) {
+    var text = [], ranges = [];
+    for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
+      var line = cm.doc.sel.ranges[i].head.line;
+      var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)};
+      ranges.push(lineRange);
+      text.push(cm.getRange(lineRange.anchor, lineRange.head));
+    }
+    return {text: text, ranges: ranges}
+  }
+
+  function disableBrowserMagic(field, spellcheck, autocorrect, autocapitalize) {
+    field.setAttribute("autocorrect", autocorrect ? "" : "off");
+    field.setAttribute("autocapitalize", autocapitalize ? "" : "off");
+    field.setAttribute("spellcheck", !!spellcheck);
+  }
+
+  function hiddenTextarea() {
+    var te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; outline: none");
+    var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
+    // The textarea is kept positioned near the cursor to prevent the
+    // fact that it'll be scrolled into view on input from scrolling
+    // our fake cursor out of view. On webkit, when wrap=off, paste is
+    // very slow. So make the area wide instead.
+    if (webkit) { te.style.width = "1000px"; }
+    else { te.setAttribute("wrap", "off"); }
+    // If border: 0; -- iOS fails to open keyboard (issue #1287)
+    if (ios) { te.style.border = "1px solid black"; }
+    disableBrowserMagic(te);
+    return div
+  }
+
+  // The publicly visible API. Note that methodOp(f) means
+  // 'wrap f in an operation, performed on its `this` parameter'.
+
+  // This is not the complete set of editor methods. Most of the
+  // methods defined on the Doc type are also injected into
+  // CodeMirror.prototype, for backwards compatibility and
+  // convenience.
+
+  function addEditorMethods(CodeMirror) {
+    var optionHandlers = CodeMirror.optionHandlers;
+
+    var helpers = CodeMirror.helpers = {};
+
+    CodeMirror.prototype = {
+      constructor: CodeMirror,
+      focus: function(){window.focus(); this.display.input.focus();},
+
+      setOption: function(option, value) {
+        var options = this.options, old = options[option];
+        if (options[option] == value && option != "mode") { return }
+        options[option] = value;
+        if (optionHandlers.hasOwnProperty(option))
+          { operation(this, optionHandlers[option])(this, value, old); }
+        signal(this, "optionChange", this, option);
+      },
+
+      getOption: function(option) {return this.options[option]},
+      getDoc: function() {return this.doc},
+
+      addKeyMap: function(map$$1, bottom) {
+        this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map$$1));
+      },
+      removeKeyMap: function(map$$1) {
+        var maps = this.state.keyMaps;
+        for (var i = 0; i < maps.length; ++i)
+          { if (maps[i] == map$$1 || maps[i].name == map$$1) {
+            maps.splice(i, 1);
+            return true
+          } }
+      },
+
+      addOverlay: methodOp(function(spec, options) {
+        var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
+        if (mode.startState) { throw new Error("Overlays may not be stateful.") }
+        insertSorted(this.state.overlays,
+                     {mode: mode, modeSpec: spec, opaque: options && options.opaque,
+                      priority: (options && options.priority) || 0},
+                     function (overlay) { return overlay.priority; });
+        this.state.modeGen++;
+        regChange(this);
+      }),
+      removeOverlay: methodOp(function(spec) {
+        var this$1 = this;
+
+        var overlays = this.state.overlays;
+        for (var i = 0; i < overlays.length; ++i) {
+          var cur = overlays[i].modeSpec;
+          if (cur == spec || typeof spec == "string" && cur.name == spec) {
+            overlays.splice(i, 1);
+            this$1.state.modeGen++;
+            regChange(this$1);
+            return
+          }
+        }
+      }),
+
+      indentLine: methodOp(function(n, dir, aggressive) {
+        if (typeof dir != "string" && typeof dir != "number") {
+          if (dir == null) { dir = this.options.smartIndent ? "smart" : "prev"; }
+          else { dir = dir ? "add" : "subtract"; }
+        }
+        if (isLine(this.doc, n)) { indentLine(this, n, dir, aggressive); }
+      }),
+      indentSelection: methodOp(function(how) {
+        var this$1 = this;
+
+        var ranges = this.doc.sel.ranges, end = -1;
+        for (var i = 0; i < ranges.length; i++) {
+          var range$$1 = ranges[i];
+          if (!range$$1.empty()) {
+            var from = range$$1.from(), to = range$$1.to();
+            var start = Math.max(end, from.line);
+            end = Math.min(this$1.lastLine(), to.line - (to.ch ? 0 : 1)) + 1;
+            for (var j = start; j < end; ++j)
+              { indentLine(this$1, j, how); }
+            var newRanges = this$1.doc.sel.ranges;
+            if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
+              { replaceOneSelection(this$1.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll); }
+          } else if (range$$1.head.line > end) {
+            indentLine(this$1, range$$1.head.line, how, true);
+            end = range$$1.head.line;
+            if (i == this$1.doc.sel.primIndex) { ensureCursorVisible(this$1); }
+          }
+        }
+      }),
+
+      // Fetch the parser token for a given character. Useful for hacks
+      // that want to inspect the mode state (say, for completion).
+      getTokenAt: function(pos, precise) {
+        return takeToken(this, pos, precise)
+      },
+
+      getLineTokens: function(line, precise) {
+        return takeToken(this, Pos(line), precise, true)
+      },
+
+      getTokenTypeAt: function(pos) {
+        pos = clipPos(this.doc, pos);
+        var styles = getLineStyles(this, getLine(this.doc, pos.line));
+        var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
+        var type;
+        if (ch == 0) { type = styles[2]; }
+        else { for (;;) {
+          var mid = (before + after) >> 1;
+          if ((mid ? styles[mid * 2 - 1] : 0) >= ch) { after = mid; }
+          else if (styles[mid * 2 + 1] < ch) { before = mid + 1; }
+          else { type = styles[mid * 2 + 2]; break }
+        } }
+        var cut = type ? type.indexOf("overlay ") : -1;
+        return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1)
+      },
+
+      getModeAt: function(pos) {
+        var mode = this.doc.mode;
+        if (!mode.innerMode) { return mode }
+        return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode
+      },
+
+      getHelper: function(pos, type) {
+        return this.getHelpers(pos, type)[0]
+      },
+
+      getHelpers: function(pos, type) {
+        var this$1 = this;
+
+        var found = [];
+        if (!helpers.hasOwnProperty(type)) { return found }
+        var help = helpers[type], mode = this.getModeAt(pos);
+        if (typeof mode[type] == "string") {
+          if (help[mode[type]]) { found.push(help[mode[type]]); }
+        } else if (mode[type]) {
+          for (var i = 0; i < mode[type].length; i++) {
+            var val = help[mode[type][i]];
+            if (val) { found.push(val); }
+          }
+        } else if (mode.helperType && help[mode.helperType]) {
+          found.push(help[mode.helperType]);
+        } else if (help[mode.name]) {
+          found.push(help[mode.name]);
+        }
+        for (var i$1 = 0; i$1 < help._global.length; i$1++) {
+          var cur = help._global[i$1];
+          if (cur.pred(mode, this$1) && indexOf(found, cur.val) == -1)
+            { found.push(cur.val); }
+        }
+        return found
+      },
+
+      getStateAfter: function(line, precise) {
+        var doc = this.doc;
+        line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
+        return getContextBefore(this, line + 1, precise).state
+      },
+
+      cursorCoords: function(start, mode) {
+        var pos, range$$1 = this.doc.sel.primary();
+        if (start == null) { pos = range$$1.head; }
+        else if (typeof start == "object") { pos = clipPos(this.doc, start); }
+        else { pos = start ? range$$1.from() : range$$1.to(); }
+        return cursorCoords(this, pos, mode || "page")
+      },
+
+      charCoords: function(pos, mode) {
+        return charCoords(this, clipPos(this.doc, pos), mode || "page")
+      },
+
+      coordsChar: function(coords, mode) {
+        coords = fromCoordSystem(this, coords, mode || "page");
+        return coordsChar(this, coords.left, coords.top)
+      },
+
+      lineAtHeight: function(height, mode) {
+        height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
+        return lineAtHeight(this.doc, height + this.display.viewOffset)
+      },
+      heightAtLine: function(line, mode, includeWidgets) {
+        var end = false, lineObj;
+        if (typeof line == "number") {
+          var last = this.doc.first + this.doc.size - 1;
+          if (line < this.doc.first) { line = this.doc.first; }
+          else if (line > last) { line = last; end = true; }
+          lineObj = getLine(this.doc, line);
+        } else {
+          lineObj = line;
+        }
+        return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page", includeWidgets || end).top +
+          (end ? this.doc.height - heightAtLine(lineObj) : 0)
+      },
+
+      defaultTextHeight: function() { return textHeight(this.display) },
+      defaultCharWidth: function() { return charWidth(this.display) },
+
+      getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo}},
+
+      addWidget: function(pos, node, scroll, vert, horiz) {
+        var display = this.display;
+        pos = cursorCoords(this, clipPos(this.doc, pos));
+        var top = pos.bottom, left = pos.left;
+        node.style.position = "absolute";
+        node.setAttribute("cm-ignore-events", "true");
+        this.display.input.setUneditable(node);
+        display.sizer.appendChild(node);
+        if (vert == "over") {
+          top = pos.top;
+        } else if (vert == "above" || vert == "near") {
+          var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
+          hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
+          // Default to positioning above (if specified and possible); otherwise default to positioning below
+          if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
+            { top = pos.top - node.offsetHeight; }
+          else if (pos.bottom + node.offsetHeight <= vspace)
+            { top = pos.bottom; }
+          if (left + node.offsetWidth > hspace)
+            { left = hspace - node.offsetWidth; }
+        }
+        node.style.top = top + "px";
+        node.style.left = node.style.right = "";
+        if (horiz == "right") {
+          left = display.sizer.clientWidth - node.offsetWidth;
+          node.style.right = "0px";
+        } else {
+          if (horiz == "left") { left = 0; }
+          else if (horiz == "middle") { left = (display.sizer.clientWidth - node.offsetWidth) / 2; }
+          node.style.left = left + "px";
+        }
+        if (scroll)
+          { scrollIntoView(this, {left: left, top: top, right: left + node.offsetWidth, bottom: top + node.offsetHeight}); }
+      },
+
+      triggerOnKeyDown: methodOp(onKeyDown),
+      triggerOnKeyPress: methodOp(onKeyPress),
+      triggerOnKeyUp: onKeyUp,
+      triggerOnMouseDown: methodOp(onMouseDown),
+
+      execCommand: function(cmd) {
+        if (commands.hasOwnProperty(cmd))
+          { return commands[cmd].call(null, this) }
+      },
+
+      triggerElectric: methodOp(function(text) { triggerElectric(this, text); }),
+
+      findPosH: function(from, amount, unit, visually) {
+        var this$1 = this;
+
+        var dir = 1;
+        if (amount < 0) { dir = -1; amount = -amount; }
+        var cur = clipPos(this.doc, from);
+        for (var i = 0; i < amount; ++i) {
+          cur = findPosH(this$1.doc, cur, dir, unit, visually);
+          if (cur.hitSide) { break }
+        }
+        return cur
+      },
+
+      moveH: methodOp(function(dir, unit) {
+        var this$1 = this;
+
+        this.extendSelectionsBy(function (range$$1) {
+          if (this$1.display.shift || this$1.doc.extend || range$$1.empty())
+            { return findPosH(this$1.doc, range$$1.head, dir, unit, this$1.options.rtlMoveVisually) }
+          else
+            { return dir < 0 ? range$$1.from() : range$$1.to() }
+        }, sel_move);
+      }),
+
+      deleteH: methodOp(function(dir, unit) {
+        var sel = this.doc.sel, doc = this.doc;
+        if (sel.somethingSelected())
+          { doc.replaceSelection("", null, "+delete"); }
+        else
+          { deleteNearSelection(this, function (range$$1) {
+            var other = findPosH(doc, range$$1.head, dir, unit, false);
+            return dir < 0 ? {from: other, to: range$$1.head} : {from: range$$1.head, to: other}
+          }); }
+      }),
+
+      findPosV: function(from, amount, unit, goalColumn) {
+        var this$1 = this;
+
+        var dir = 1, x = goalColumn;
+        if (amount < 0) { dir = -1; amount = -amount; }
+        var cur = clipPos(this.doc, from);
+        for (var i = 0; i < amount; ++i) {
+          var coords = cursorCoords(this$1, cur, "div");
+          if (x == null) { x = coords.left; }
+          else { coords.left = x; }
+          cur = findPosV(this$1, coords, dir, unit);
+          if (cur.hitSide) { break }
+        }
+        return cur
+      },
+
+      moveV: methodOp(function(dir, unit) {
+        var this$1 = this;
+
+        var doc = this.doc, goals = [];
+        var collapse = !this.display.shift && !doc.extend && doc.sel.somethingSelected();
+        doc.extendSelectionsBy(function (range$$1) {
+          if (collapse)
+            { return dir < 0 ? range$$1.from() : range$$1.to() }
+          var headPos = cursorCoords(this$1, range$$1.head, "div");
+          if (range$$1.goalColumn != null) { headPos.left = range$$1.goalColumn; }
+          goals.push(headPos.left);
+          var pos = findPosV(this$1, headPos, dir, unit);
+          if (unit == "page" && range$$1 == doc.sel.primary())
+            { addToScrollTop(this$1, charCoords(this$1, pos, "div").top - headPos.top); }
+          return pos
+        }, sel_move);
+        if (goals.length) { for (var i = 0; i < doc.sel.ranges.length; i++)
+          { doc.sel.ranges[i].goalColumn = goals[i]; } }
+      }),
+
+      // Find the word at the given position (as returned by coordsChar).
+      findWordAt: function(pos) {
+        var doc = this.doc, line = getLine(doc, pos.line).text;
+        var start = pos.ch, end = pos.ch;
+        if (line) {
+          var helper = this.getHelper(pos, "wordChars");
+          if ((pos.sticky == "before" || end == line.length) && start) { --start; } else { ++end; }
+          var startChar = line.charAt(start);
+          var check = isWordChar(startChar, helper)
+            ? function (ch) { return isWordChar(ch, helper); }
+            : /\s/.test(startChar) ? function (ch) { return /\s/.test(ch); }
+            : function (ch) { return (!/\s/.test(ch) && !isWordChar(ch)); };
+          while (start > 0 && check(line.charAt(start - 1))) { --start; }
+          while (end < line.length && check(line.charAt(end))) { ++end; }
+        }
+        return new Range(Pos(pos.line, start), Pos(pos.line, end))
+      },
+
+      toggleOverwrite: function(value) {
+        if (value != null && value == this.state.overwrite) { return }
+        if (this.state.overwrite = !this.state.overwrite)
+          { addClass(this.display.cursorDiv, "CodeMirror-overwrite"); }
+        else
+          { rmClass(this.display.cursorDiv, "CodeMirror-overwrite"); }
+
+        signal(this, "overwriteToggle", this, this.state.overwrite);
+      },
+      hasFocus: function() { return this.display.input.getField() == activeElt() },
+      isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit) },
+
+      scrollTo: methodOp(function (x, y) { scrollToCoords(this, x, y); }),
+      getScrollInfo: function() {
+        var scroller = this.display.scroller;
+        return {left: scroller.scrollLeft, top: scroller.scrollTop,
+                height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
+                width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
+                clientHeight: displayHeight(this), clientWidth: displayWidth(this)}
+      },
+
+      scrollIntoView: methodOp(function(range$$1, margin) {
+        if (range$$1 == null) {
+          range$$1 = {from: this.doc.sel.primary().head, to: null};
+          if (margin == null) { margin = this.options.cursorScrollMargin; }
+        } else if (typeof range$$1 == "number") {
+          range$$1 = {from: Pos(range$$1, 0), to: null};
+        } else if (range$$1.from == null) {
+          range$$1 = {from: range$$1, to: null};
+        }
+        if (!range$$1.to) { range$$1.to = range$$1.from; }
+        range$$1.margin = margin || 0;
+
+        if (range$$1.from.line != null) {
+          scrollToRange(this, range$$1);
+        } else {
+          scrollToCoordsRange(this, range$$1.from, range$$1.to, range$$1.margin);
+        }
+      }),
+
+      setSize: methodOp(function(width, height) {
+        var this$1 = this;
+
+        var interpret = function (val) { return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; };
+        if (width != null) { this.display.wrapper.style.width = interpret(width); }
+        if (height != null) { this.display.wrapper.style.height = interpret(height); }
+        if (this.options.lineWrapping) { clearLineMeasurementCache(this); }
+        var lineNo$$1 = this.display.viewFrom;
+        this.doc.iter(lineNo$$1, this.display.viewTo, function (line) {
+          if (line.widgets) { for (var i = 0; i < line.widgets.length; i++)
+            { if (line.widgets[i].noHScroll) { regLineChange(this$1, lineNo$$1, "widget"); break } } }
+          ++lineNo$$1;
+        });
+        this.curOp.forceUpdate = true;
+        signal(this, "refresh", this);
+      }),
+
+      operation: function(f){return runInOp(this, f)},
+      startOperation: function(){return startOperation(this)},
+      endOperation: function(){return endOperation(this)},
+
+      refresh: methodOp(function() {
+        var oldHeight = this.display.cachedTextHeight;
+        regChange(this);
+        this.curOp.forceUpdate = true;
+        clearCaches(this);
+        scrollToCoords(this, this.doc.scrollLeft, this.doc.scrollTop);
+        updateGutterSpace(this.display);
+        if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
+          { estimateLineHeights(this); }
+        signal(this, "refresh", this);
+      }),
+
+      swapDoc: methodOp(function(doc) {
+        var old = this.doc;
+        old.cm = null;
+        // Cancel the current text selection if any (#5821)
+        if (this.state.selectingText) { this.state.selectingText(); }
+        attachDoc(this, doc);
+        clearCaches(this);
+        this.display.input.reset();
+        scrollToCoords(this, doc.scrollLeft, doc.scrollTop);
+        this.curOp.forceScroll = true;
+        signalLater(this, "swapDoc", this, old);
+        return old
+      }),
+
+      phrase: function(phraseText) {
+        var phrases = this.options.phrases;
+        return phrases && Object.prototype.hasOwnProperty.call(phrases, phraseText) ? phrases[phraseText] : phraseText
+      },
+
+      getInputField: function(){return this.display.input.getField()},
+      getWrapperElement: function(){return this.display.wrapper},
+      getScrollerElement: function(){return this.display.scroller},
+      getGutterElement: function(){return this.display.gutters}
+    };
+    eventMixin(CodeMirror);
+
+    CodeMirror.registerHelper = function(type, name, value) {
+      if (!helpers.hasOwnProperty(type)) { helpers[type] = CodeMirror[type] = {_global: []}; }
+      helpers[type][name] = value;
+    };
+    CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
+      CodeMirror.registerHelper(type, name, value);
+      helpers[type]._global.push({pred: predicate, val: value});
+    };
+  }
+
+  // Used for horizontal relative motion. Dir is -1 or 1 (left or
+  // right), unit can be "char", "column" (like char, but doesn't
+  // cross line boundaries), "word" (across next word), or "group" (to
+  // the start of next group of word or non-word-non-whitespace
+  // chars). The visually param controls whether, in right-to-left
+  // text, direction 1 means to move towards the next index in the
+  // string, or towards the character to the right of the current
+  // position. The resulting position will have a hitSide=true
+  // property if it reached the end of the document.
+  function findPosH(doc, pos, dir, unit, visually) {
+    var oldPos = pos;
+    var origDir = dir;
+    var lineObj = getLine(doc, pos.line);
+    function findNextLine() {
+      var l = pos.line + dir;
+      if (l < doc.first || l >= doc.first + doc.size) { return false }
+      pos = new Pos(l, pos.ch, pos.sticky);
+      return lineObj = getLine(doc, l)
+    }
+    function moveOnce(boundToLine) {
+      var next;
+      if (visually) {
+        next = moveVisually(doc.cm, lineObj, pos, dir);
+      } else {
+        next = moveLogically(lineObj, pos, dir);
+      }
+      if (next == null) {
+        if (!boundToLine && findNextLine())
+          { pos = endOfLine(visually, doc.cm, lineObj, pos.line, dir); }
+        else
+          { return false }
+      } else {
+        pos = next;
+      }
+      return true
+    }
+
+    if (unit == "char") {
+      moveOnce();
+    } else if (unit == "column") {
+      moveOnce(true);
+    } else if (unit == "word" || unit == "group") {
+      var sawType = null, group = unit == "group";
+      var helper = doc.cm && doc.cm.getHelper(pos, "wordChars");
+      for (var first = true;; first = false) {
+        if (dir < 0 && !moveOnce(!first)) { break }
+        var cur = lineObj.text.charAt(pos.ch) || "\n";
+        var type = isWordChar(cur, helper) ? "w"
+          : group && cur == "\n" ? "n"
+          : !group || /\s/.test(cur) ? null
+          : "p";
+        if (group && !first && !type) { type = "s"; }
+        if (sawType && sawType != type) {
+          if (dir < 0) {dir = 1; moveOnce(); pos.sticky = "after";}
+          break
+        }
+
+        if (type) { sawType = type; }
+        if (dir > 0 && !moveOnce(!first)) { break }
+      }
+    }
+    var result = skipAtomic(doc, pos, oldPos, origDir, true);
+    if (equalCursorPos(oldPos, result)) { result.hitSide = true; }
+    return result
+  }
+
+  // For relative vertical movement. Dir may be -1 or 1. Unit can be
+  // "page" or "line". The resulting position will have a hitSide=true
+  // property if it reached the end of the document.
+  function findPosV(cm, pos, dir, unit) {
+    var doc = cm.doc, x = pos.left, y;
+    if (unit == "page") {
+      var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
+      var moveAmount = Math.max(pageSize - .5 * textHeight(cm.display), 3);
+      y = (dir > 0 ? pos.bottom : pos.top) + dir * moveAmount;
+
+    } else if (unit == "line") {
+      y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
+    }
+    var target;
+    for (;;) {
+      target = coordsChar(cm, x, y);
+      if (!target.outside) { break }
+      if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break }
+      y += dir * 5;
+    }
+    return target
+  }
+
+  // CONTENTEDITABLE INPUT STYLE
+
+  var ContentEditableInput = function(cm) {
+    this.cm = cm;
+    this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null;
+    this.polling = new Delayed();
+    this.composing = null;
+    this.gracePeriod = false;
+    this.readDOMTimeout = null;
+  };
+
+  ContentEditableInput.prototype.init = function (display) {
+      var this$1 = this;
+
+    var input = this, cm = input.cm;
+    var div = input.div = display.lineDiv;
+    disableBrowserMagic(div, cm.options.spellcheck, cm.options.autocorrect, cm.options.autocapitalize);
+
+    on(div, "paste", function (e) {
+      if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
+      // IE doesn't fire input events, so we schedule a read for the pasted content in this way
+      if (ie_version <= 11) { setTimeout(operation(cm, function () { return this$1.updateFromDOM(); }), 20); }
+    });
+
+    on(div, "compositionstart", function (e) {
+      this$1.composing = {data: e.data, done: false};
+    });
+    on(div, "compositionupdate", function (e) {
+      if (!this$1.composing) { this$1.composing = {data: e.data, done: false}; }
+    });
+    on(div, "compositionend", function (e) {
+      if (this$1.composing) {
+        if (e.data != this$1.composing.data) { this$1.readFromDOMSoon(); }
+        this$1.composing.done = true;
+      }
+    });
+
+    on(div, "touchstart", function () { return input.forceCompositionEnd(); });
+
+    on(div, "input", function () {
+      if (!this$1.composing) { this$1.readFromDOMSoon(); }
+    });
+
+    function onCopyCut(e) {
+      if (signalDOMEvent(cm, e)) { return }
+      if (cm.somethingSelected()) {
+        setLastCopied({lineWise: false, text: cm.getSelections()});
+        if (e.type == "cut") { cm.replaceSelection("", null, "cut"); }
+      } else if (!cm.options.lineWiseCopyCut) {
+        return
+      } else {
+        var ranges = copyableRanges(cm);
+        setLastCopied({lineWise: true, text: ranges.text});
+        if (e.type == "cut") {
+          cm.operation(function () {
+            cm.setSelections(ranges.ranges, 0, sel_dontScroll);
+            cm.replaceSelection("", null, "cut");
+          });
+        }
+      }
+      if (e.clipboardData) {
+        e.clipboardData.clearData();
+        var content = lastCopied.text.join("\n");
+        // iOS exposes the clipboard API, but seems to discard content inserted into it
+        e.clipboardData.setData("Text", content);
+        if (e.clipboardData.getData("Text") == content) {
+          e.preventDefault();
+          return
+        }
+      }
+      // Old-fashioned briefly-focus-a-textarea hack
+      var kludge = hiddenTextarea(), te = kludge.firstChild;
+      cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild);
+      te.value = lastCopied.text.join("\n");
+      var hadFocus = document.activeElement;
+      selectInput(te);
+      setTimeout(function () {
+        cm.display.lineSpace.removeChild(kludge);
+        hadFocus.focus();
+        if (hadFocus == div) { input.showPrimarySelection(); }
+      }, 50);
+    }
+    on(div, "copy", onCopyCut);
+    on(div, "cut", onCopyCut);
+  };
+
+  ContentEditableInput.prototype.prepareSelection = function () {
+    var result = prepareSelection(this.cm, false);
+    result.focus = this.cm.state.focused;
+    return result
+  };
+
+  ContentEditableInput.prototype.showSelection = function (info, takeFocus) {
+    if (!info || !this.cm.display.view.length) { return }
+    if (info.focus || takeFocus) { this.showPrimarySelection(); }
+    this.showMultipleSelections(info);
+  };
+
+  ContentEditableInput.prototype.getSelection = function () {
+    return this.cm.display.wrapper.ownerDocument.getSelection()
+  };
+
+  ContentEditableInput.prototype.showPrimarySelection = function () {
+    var sel = this.getSelection(), cm = this.cm, prim = cm.doc.sel.primary();
+    var from = prim.from(), to = prim.to();
+
+    if (cm.display.viewTo == cm.display.viewFrom || from.line >= cm.display.viewTo || to.line < cm.display.viewFrom) {
+      sel.removeAllRanges();
+      return
+    }
+
+    var curAnchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
+    var curFocus = domToPos(cm, sel.focusNode, sel.focusOffset);
+    if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
+        cmp(minPos(curAnchor, curFocus), from) == 0 &&
+        cmp(maxPos(curAnchor, curFocus), to) == 0)
+      { return }
+
+    var view = cm.display.view;
+    var start = (from.line >= cm.display.viewFrom && posToDOM(cm, from)) ||
+        {node: view[0].measure.map[2], offset: 0};
+    var end = to.line < cm.display.viewTo && posToDOM(cm, to);
+    if (!end) {
+      var measure = view[view.length - 1].measure;
+      var map$$1 = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map;
+      end = {node: map$$1[map$$1.length - 1], offset: map$$1[map$$1.length - 2] - map$$1[map$$1.length - 3]};
+    }
+
+    if (!start || !end) {
+      sel.removeAllRanges();
+      return
+    }
+
+    var old = sel.rangeCount && sel.getRangeAt(0), rng;
+    try { rng = range(start.node, start.offset, end.offset, end.node); }
+    catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
+    if (rng) {
+      if (!gecko && cm.state.focused) {
+        sel.collapse(start.node, start.offset);
+        if (!rng.collapsed) {
+          sel.removeAllRanges();
+          sel.addRange(rng);
+        }
+      } else {
+        sel.removeAllRanges();
+        sel.addRange(rng);
+      }
+      if (old && sel.anchorNode == null) { sel.addRange(old); }
+      else if (gecko) { this.startGracePeriod(); }
+    }
+    this.rememberSelection();
+  };
+
+  ContentEditableInput.prototype.startGracePeriod = function () {
+      var this$1 = this;
+
+    clearTimeout(this.gracePeriod);
+    this.gracePeriod = setTimeout(function () {
+      this$1.gracePeriod = false;
+      if (this$1.selectionChanged())
+        { this$1.cm.operation(function () { return this$1.cm.curOp.selectionChanged = true; }); }
+    }, 20);
+  };
+
+  ContentEditableInput.prototype.showMultipleSelections = function (info) {
+    removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors);
+    removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection);
+  };
+
+  ContentEditableInput.prototype.rememberSelection = function () {
+    var sel = this.getSelection();
+    this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset;
+    this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset;
+  };
+
+  ContentEditableInput.prototype.selectionInEditor = function () {
+    var sel = this.getSelection();
+    if (!sel.rangeCount) { return false }
+    var node = sel.getRangeAt(0).commonAncestorContainer;
+    return contains(this.div, node)
+  };
+
+  ContentEditableInput.prototype.focus = function () {
+    if (this.cm.options.readOnly != "nocursor") {
+      if (!this.selectionInEditor())
+        { this.showSelection(this.prepareSelection(), true); }
+      this.div.focus();
+    }
+  };
+  ContentEditableInput.prototype.blur = function () { this.div.blur(); };
+  ContentEditableInput.prototype.getField = function () { return this.div };
+
+  ContentEditableInput.prototype.supportsTouch = function () { return true };
+
+  ContentEditableInput.prototype.receivedFocus = function () {
+    var input = this;
+    if (this.selectionInEditor())
+      { this.pollSelection(); }
+    else
+      { runInOp(this.cm, function () { return input.cm.curOp.selectionChanged = true; }); }
+
+    function poll() {
+      if (input.cm.state.focused) {
+        input.pollSelection();
+        input.polling.set(input.cm.options.pollInterval, poll);
+      }
+    }
+    this.polling.set(this.cm.options.pollInterval, poll);
+  };
+
+  ContentEditableInput.prototype.selectionChanged = function () {
+    var sel = this.getSelection();
+    return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
+      sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset
+  };
+
+  ContentEditableInput.prototype.pollSelection = function () {
+    if (this.readDOMTimeout != null || this.gracePeriod || !this.selectionChanged()) { return }
+    var sel = this.getSelection(), cm = this.cm;
+    // On Android Chrome (version 56, at least), backspacing into an
+    // uneditable block element will put the cursor in that element,
+    // and then, because it's not editable, hide the virtual keyboard.
+    // Because Android doesn't allow us to actually detect backspace
+    // presses in a sane way, this code checks for when that happens
+    // and simulates a backspace press in this case.
+    if (android && chrome && this.cm.display.gutterSpecs.length && isInGutter(sel.anchorNode)) {
+      this.cm.triggerOnKeyDown({type: "keydown", keyCode: 8, preventDefault: Math.abs});
+      this.blur();
+      this.focus();
+      return
+    }
+    if (this.composing) { return }
+    this.rememberSelection();
+    var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
+    var head = domToPos(cm, sel.focusNode, sel.focusOffset);
+    if (anchor && head) { runInOp(cm, function () {
+      setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll);
+      if (anchor.bad || head.bad) { cm.curOp.selectionChanged = true; }
+    }); }
+  };
+
+  ContentEditableInput.prototype.pollContent = function () {
+    if (this.readDOMTimeout != null) {
+      clearTimeout(this.readDOMTimeout);
+      this.readDOMTimeout = null;
+    }
+
+    var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary();
+    var from = sel.from(), to = sel.to();
+    if (from.ch == 0 && from.line > cm.firstLine())
+      { from = Pos(from.line - 1, getLine(cm.doc, from.line - 1).length); }
+    if (to.ch == getLine(cm.doc, to.line).text.length && to.line < cm.lastLine())
+      { to = Pos(to.line + 1, 0); }
+    if (from.line < display.viewFrom || to.line > display.viewTo - 1) { return false }
+
+    var fromIndex, fromLine, fromNode;
+    if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
+      fromLine = lineNo(display.view[0].line);
+      fromNode = display.view[0].node;
+    } else {
+      fromLine = lineNo(display.view[fromIndex].line);
+      fromNode = display.view[fromIndex - 1].node.nextSibling;
+    }
+    var toIndex = findViewIndex(cm, to.line);
+    var toLine, toNode;
+    if (toIndex == display.view.length - 1) {
+      toLine = display.viewTo - 1;
+      toNode = display.lineDiv.lastChild;
+    } else {
+      toLine = lineNo(display.view[toIndex + 1].line) - 1;
+      toNode = display.view[toIndex + 1].node.previousSibling;
+    }
+
+    if (!fromNode) { return false }
+    var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine));
+    var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length));
+    while (newText.length > 1 && oldText.length > 1) {
+      if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine--; }
+      else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++; }
+      else { break }
+    }
+
+    var cutFront = 0, cutEnd = 0;
+    var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length);
+    while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
+      { ++cutFront; }
+    var newBot = lst(newText), oldBot = lst(oldText);
+    var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
+                             oldBot.length - (oldText.length == 1 ? cutFront : 0));
+    while (cutEnd < maxCutEnd &&
+           newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
+      { ++cutEnd; }
+    // Try to move start of change to start of selection if ambiguous
+    if (newText.length == 1 && oldText.length == 1 && fromLine == from.line) {
+      while (cutFront && cutFront > from.ch &&
+             newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1)) {
+        cutFront--;
+        cutEnd++;
+      }
+    }
+
+    newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd).replace(/^\u200b+/, "");
+    newText[0] = newText[0].slice(cutFront).replace(/\u200b+$/, "");
+
+    var chFrom = Pos(fromLine, cutFront);
+    var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0);
+    if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
+      replaceRange(cm.doc, newText, chFrom, chTo, "+input");
+      return true
+    }
+  };
+
+  ContentEditableInput.prototype.ensurePolled = function () {
+    this.forceCompositionEnd();
+  };
+  ContentEditableInput.prototype.reset = function () {
+    this.forceCompositionEnd();
+  };
+  ContentEditableInput.prototype.forceCompositionEnd = function () {
+    if (!this.composing) { return }
+    clearTimeout(this.readDOMTimeout);
+    this.composing = null;
+    this.updateFromDOM();
+    this.div.blur();
+    this.div.focus();
+  };
+  ContentEditableInput.prototype.readFromDOMSoon = function () {
+      var this$1 = this;
+
+    if (this.readDOMTimeout != null) { return }
+    this.readDOMTimeout = setTimeout(function () {
+      this$1.readDOMTimeout = null;
+      if (this$1.composing) {
+        if (this$1.composing.done) { this$1.composing = null; }
+        else { return }
+      }
+      this$1.updateFromDOM();
+    }, 80);
+  };
+
+  ContentEditableInput.prototype.updateFromDOM = function () {
+      var this$1 = this;
+
+    if (this.cm.isReadOnly() || !this.pollContent())
+      { runInOp(this.cm, function () { return regChange(this$1.cm); }); }
+  };
+
+  ContentEditableInput.prototype.setUneditable = function (node) {
+    node.contentEditable = "false";
+  };
+
+  ContentEditableInput.prototype.onKeyPress = function (e) {
+    if (e.charCode == 0 || this.composing) { return }
+    e.preventDefault();
+    if (!this.cm.isReadOnly())
+      { operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0); }
+  };
+
+  ContentEditableInput.prototype.readOnlyChanged = function (val) {
+    this.div.contentEditable = String(val != "nocursor");
+  };
+
+  ContentEditableInput.prototype.onContextMenu = function () {};
+  ContentEditableInput.prototype.resetPosition = function () {};
+
+  ContentEditableInput.prototype.needsContentAttribute = true;
+
+  function posToDOM(cm, pos) {
+    var view = findViewForLine(cm, pos.line);
+    if (!view || view.hidden) { return null }
+    var line = getLine(cm.doc, pos.line);
+    var info = mapFromLineView(view, line, pos.line);
+
+    var order = getOrder(line, cm.doc.direction), side = "left";
+    if (order) {
+      var partPos = getBidiPartAt(order, pos.ch);
+      side = partPos % 2 ? "right" : "left";
+    }
+    var result = nodeAndOffsetInLineMap(info.map, pos.ch, side);
+    result.offset = result.collapse == "right" ? result.end : result.start;
+    return result
+  }
+
+  function isInGutter(node) {
+    for (var scan = node; scan; scan = scan.parentNode)
+      { if (/CodeMirror-gutter-wrapper/.test(scan.className)) { return true } }
+    return false
+  }
+
+  function badPos(pos, bad) { if (bad) { pos.bad = true; } return pos }
+
+  function domTextBetween(cm, from, to, fromLine, toLine) {
+    var text = "", closing = false, lineSep = cm.doc.lineSeparator(), extraLinebreak = false;
+    function recognizeMarker(id) { return function (marker) { return marker.id == id; } }
+    function close() {
+      if (closing) {
+        text += lineSep;
+        if (extraLinebreak) { text += lineSep; }
+        closing = extraLinebreak = false;
+      }
+    }
+    function addText(str) {
+      if (str) {
+        close();
+        text += str;
+      }
+    }
+    function walk(node) {
+      if (node.nodeType == 1) {
+        var cmText = node.getAttribute("cm-text");
+        if (cmText) {
+          addText(cmText);
+          return
+        }
+        var markerID = node.getAttribute("cm-marker"), range$$1;
+        if (markerID) {
+          var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID));
+          if (found.length && (range$$1 = found[0].find(0)))
+            { addText(getBetween(cm.doc, range$$1.from, range$$1.to).join(lineSep)); }
+          return
+        }
+        if (node.getAttribute("contenteditable") == "false") { return }
+        var isBlock = /^(pre|div|p|li|table|br)$/i.test(node.nodeName);
+        if (!/^br$/i.test(node.nodeName) && node.textContent.length == 0) { return }
+
+        if (isBlock) { close(); }
+        for (var i = 0; i < node.childNodes.length; i++)
+          { walk(node.childNodes[i]); }
+
+        if (/^(pre|p)$/i.test(node.nodeName)) { extraLinebreak = true; }
+        if (isBlock) { closing = true; }
+      } else if (node.nodeType == 3) {
+        addText(node.nodeValue.replace(/\u200b/g, "").replace(/\u00a0/g, " "));
+      }
+    }
+    for (;;) {
+      walk(from);
+      if (from == to) { break }
+      from = from.nextSibling;
+      extraLinebreak = false;
+    }
+    return text
+  }
+
+  function domToPos(cm, node, offset) {
+    var lineNode;
+    if (node == cm.display.lineDiv) {
+      lineNode = cm.display.lineDiv.childNodes[offset];
+      if (!lineNode) { return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true) }
+      node = null; offset = 0;
+    } else {
+      for (lineNode = node;; lineNode = lineNode.parentNode) {
+        if (!lineNode || lineNode == cm.display.lineDiv) { return null }
+        if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) { break }
+      }
+    }
+    for (var i = 0; i < cm.display.view.length; i++) {
+      var lineView = cm.display.view[i];
+      if (lineView.node == lineNode)
+        { return locateNodeInLineView(lineView, node, offset) }
+    }
+  }
+
+  function locateNodeInLineView(lineView, node, offset) {
+    var wrapper = lineView.text.firstChild, bad = false;
+    if (!node || !contains(wrapper, node)) { return badPos(Pos(lineNo(lineView.line), 0), true) }
+    if (node == wrapper) {
+      bad = true;
+      node = wrapper.childNodes[offset];
+      offset = 0;
+      if (!node) {
+        var line = lineView.rest ? lst(lineView.rest) : lineView.line;
+        return badPos(Pos(lineNo(line), line.text.length), bad)
+      }
+    }
+
+    var textNode = node.nodeType == 3 ? node : null, topNode = node;
+    if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
+      textNode = node.firstChild;
+      if (offset) { offset = textNode.nodeValue.length; }
+    }
+    while (topNode.parentNode != wrapper) { topNode = topNode.parentNode; }
+    var measure = lineView.measure, maps = measure.maps;
+
+    function find(textNode, topNode, offset) {
+      for (var i = -1; i < (maps ? maps.length : 0); i++) {
+        var map$$1 = i < 0 ? measure.map : maps[i];
+        for (var j = 0; j < map$$1.length; j += 3) {
+          var curNode = map$$1[j + 2];
+          if (curNode == textNode || curNode == topNode) {
+            var line = lineNo(i < 0 ? lineView.line : lineView.rest[i]);
+            var ch = map$$1[j] + offset;
+            if (offset < 0 || curNode != textNode) { ch = map$$1[j + (offset ? 1 : 0)]; }
+            return Pos(line, ch)
+          }
+        }
+      }
+    }
+    var found = find(textNode, topNode, offset);
+    if (found) { return badPos(found, bad) }
+
+    // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
+    for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
+      found = find(after, after.firstChild, 0);
+      if (found)
+        { return badPos(Pos(found.line, found.ch - dist), bad) }
+      else
+        { dist += after.textContent.length; }
+    }
+    for (var before = topNode.previousSibling, dist$1 = offset; before; before = before.previousSibling) {
+      found = find(before, before.firstChild, -1);
+      if (found)
+        { return badPos(Pos(found.line, found.ch + dist$1), bad) }
+      else
+        { dist$1 += before.textContent.length; }
+    }
+  }
+
+  // TEXTAREA INPUT STYLE
+
+  var TextareaInput = function(cm) {
+    this.cm = cm;
+    // See input.poll and input.reset
+    this.prevInput = "";
+
+    // Flag that indicates whether we expect input to appear real soon
+    // now (after some event like 'keypress' or 'input') and are
+    // polling intensively.
+    this.pollingFast = false;
+    // Self-resetting timeout for the poller
+    this.polling = new Delayed();
+    // Used to work around IE issue with selection being forgotten when focus moves away from textarea
+    this.hasSelection = false;
+    this.composing = null;
+  };
+
+  TextareaInput.prototype.init = function (display) {
+      var this$1 = this;
+
+    var input = this, cm = this.cm;
+    this.createField(display);
+    var te = this.textarea;
+
+    display.wrapper.insertBefore(this.wrapper, display.wrapper.firstChild);
+
+    // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
+    if (ios) { te.style.width = "0px"; }
+
+    on(te, "input", function () {
+      if (ie && ie_version >= 9 && this$1.hasSelection) { this$1.hasSelection = null; }
+      input.poll();
+    });
+
+    on(te, "paste", function (e) {
+      if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
+
+      cm.state.pasteIncoming = +new Date;
+      input.fastPoll();
+    });
+
+    function prepareCopyCut(e) {
+      if (signalDOMEvent(cm, e)) { return }
+      if (cm.somethingSelected()) {
+        setLastCopied({lineWise: false, text: cm.getSelections()});
+      } else if (!cm.options.lineWiseCopyCut) {
+        return
+      } else {
+        var ranges = copyableRanges(cm);
+        setLastCopied({lineWise: true, text: ranges.text});
+        if (e.type == "cut") {
+          cm.setSelections(ranges.ranges, null, sel_dontScroll);
+        } else {
+          input.prevInput = "";
+          te.value = ranges.text.join("\n");
+          selectInput(te);
+        }
+      }
+      if (e.type == "cut") { cm.state.cutIncoming = +new Date; }
+    }
+    on(te, "cut", prepareCopyCut);
+    on(te, "copy", prepareCopyCut);
+
+    on(display.scroller, "paste", function (e) {
+      if (eventInWidget(display, e) || signalDOMEvent(cm, e)) { return }
+      if (!te.dispatchEvent) {
+        cm.state.pasteIncoming = +new Date;
+        input.focus();
+        return
+      }
+
+      // Pass the `paste` event to the textarea so it's handled by its event listener.
+      var event = new Event("paste");
+      event.clipboardData = e.clipboardData;
+      te.dispatchEvent(event);
+    });
+
+    // Prevent normal selection in the editor (we handle our own)
+    on(display.lineSpace, "selectstart", function (e) {
+      if (!eventInWidget(display, e)) { e_preventDefault(e); }
+    });
+
+    on(te, "compositionstart", function () {
+      var start = cm.getCursor("from");
+      if (input.composing) { input.composing.range.clear(); }
+      input.composing = {
+        start: start,
+        range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
+      };
+    });
+    on(te, "compositionend", function () {
+      if (input.composing) {
+        input.poll();
+        input.composing.range.clear();
+        input.composing = null;
+      }
+    });
+  };
+
+  TextareaInput.prototype.createField = function (_display) {
+    // Wraps and hides input textarea
+    this.wrapper = hiddenTextarea();
+    // The semihidden textarea that is focused when the editor is
+    // focused, and receives input.
+    this.textarea = this.wrapper.firstChild;
+  };
+
+  TextareaInput.prototype.prepareSelection = function () {
+    // Redraw the selection and/or cursor
+    var cm = this.cm, display = cm.display, doc = cm.doc;
+    var result = prepareSelection(cm);
+
+    // Move the hidden textarea near the cursor to prevent scrolling artifacts
+    if (cm.options.moveInputWithCursor) {
+      var headPos = cursorCoords(cm, doc.sel.primary().head, "div");
+      var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect();
+      result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
+                                          headPos.top + lineOff.top - wrapOff.top));
+      result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
+                                           headPos.left + lineOff.left - wrapOff.left));
+    }
+
+    return result
+  };
+
+  TextareaInput.prototype.showSelection = function (drawn) {
+    var cm = this.cm, display = cm.display;
+    removeChildrenAndAdd(display.cursorDiv, drawn.cursors);
+    removeChildrenAndAdd(display.selectionDiv, drawn.selection);
+    if (drawn.teTop != null) {
+      this.wrapper.style.top = drawn.teTop + "px";
+      this.wrapper.style.left = drawn.teLeft + "px";
+    }
+  };
+
+  // Reset the input to correspond to the selection (or to be empty,
+  // when not typing and nothing is selected)
+  TextareaInput.prototype.reset = function (typing) {
+    if (this.contextMenuPending || this.composing) { return }
+    var cm = this.cm;
+    if (cm.somethingSelected()) {
+      this.prevInput = "";
+      var content = cm.getSelection();
+      this.textarea.value = content;
+      if (cm.state.focused) { selectInput(this.textarea); }
+      if (ie && ie_version >= 9) { this.hasSelection = content; }
+    } else if (!typing) {
+      this.prevInput = this.textarea.value = "";
+      if (ie && ie_version >= 9) { this.hasSelection = null; }
+    }
+  };
+
+  TextareaInput.prototype.getField = function () { return this.textarea };
+
+  TextareaInput.prototype.supportsTouch = function () { return false };
+
+  TextareaInput.prototype.focus = function () {
+    if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
+      try { this.textarea.focus(); }
+      catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
+    }
+  };
+
+  TextareaInput.prototype.blur = function () { this.textarea.blur(); };
+
+  TextareaInput.prototype.resetPosition = function () {
+    this.wrapper.style.top = this.wrapper.style.left = 0;
+  };
+
+  TextareaInput.prototype.receivedFocus = function () { this.slowPoll(); };
+
+  // Poll for input changes, using the normal rate of polling. This
+  // runs as long as the editor is focused.
+  TextareaInput.prototype.slowPoll = function () {
+      var this$1 = this;
+
+    if (this.pollingFast) { return }
+    this.polling.set(this.cm.options.pollInterval, function () {
+      this$1.poll();
+      if (this$1.cm.state.focused) { this$1.slowPoll(); }
+    });
+  };
+
+  // When an event has just come in that is likely to add or change
+  // something in the input textarea, we poll faster, to ensure that
+  // the change appears on the screen quickly.
+  TextareaInput.prototype.fastPoll = function () {
+    var missed = false, input = this;
+    input.pollingFast = true;
+    function p() {
+      var changed = input.poll();
+      if (!changed && !missed) {missed = true; input.polling.set(60, p);}
+      else {input.pollingFast = false; input.slowPoll();}
+    }
+    input.polling.set(20, p);
+  };
+
+  // Read input from the textarea, and update the document to match.
+  // When something is selected, it is present in the textarea, and
+  // selected (unless it is huge, in which case a placeholder is
+  // used). When nothing is selected, the cursor sits after previously
+  // seen text (can be empty), which is stored in prevInput (we must
+  // not reset the textarea when typing, because that breaks IME).
+  TextareaInput.prototype.poll = function () {
+      var this$1 = this;
+
+    var cm = this.cm, input = this.textarea, prevInput = this.prevInput;
+    // Since this is called a *lot*, try to bail out as cheaply as
+    // possible when it is clear that nothing happened. hasSelection
+    // will be the case when there is a lot of text in the textarea,
+    // in which case reading its value would be expensive.
+    if (this.contextMenuPending || !cm.state.focused ||
+        (hasSelection(input) && !prevInput && !this.composing) ||
+        cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
+      { return false }
+
+    var text = input.value;
+    // If nothing changed, bail.
+    if (text == prevInput && !cm.somethingSelected()) { return false }
+    // Work around nonsensical selection resetting in IE9/10, and
+    // inexplicable appearance of private area unicode characters on
+    // some key combos in Mac (#2689).
+    if (ie && ie_version >= 9 && this.hasSelection === text ||
+        mac && /[\uf700-\uf7ff]/.test(text)) {
+      cm.display.input.reset();
+      return false
+    }
+
+    if (cm.doc.sel == cm.display.selForContextMenu) {
+      var first = text.charCodeAt(0);
+      if (first == 0x200b && !prevInput) { prevInput = "\u200b"; }
+      if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo") }
+    }
+    // Find the part of the input that is actually new
+    var same = 0, l = Math.min(prevInput.length, text.length);
+    while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) { ++same; }
+
+    runInOp(cm, function () {
+      applyTextInput(cm, text.slice(same), prevInput.length - same,
+                     null, this$1.composing ? "*compose" : null);
+
+      // Don't leave long text in the textarea, since it makes further polling slow
+      if (text.length > 1000 || text.indexOf("\n") > -1) { input.value = this$1.prevInput = ""; }
+      else { this$1.prevInput = text; }
+
+      if (this$1.composing) {
+        this$1.composing.range.clear();
+        this$1.composing.range = cm.markText(this$1.composing.start, cm.getCursor("to"),
+                                           {className: "CodeMirror-composing"});
+      }
+    });
+    return true
+  };
+
+  TextareaInput.prototype.ensurePolled = function () {
+    if (this.pollingFast && this.poll()) { this.pollingFast = false; }
+  };
+
+  TextareaInput.prototype.onKeyPress = function () {
+    if (ie && ie_version >= 9) { this.hasSelection = null; }
+    this.fastPoll();
+  };
+
+  TextareaInput.prototype.onContextMenu = function (e) {
+    var input = this, cm = input.cm, display = cm.display, te = input.textarea;
+    if (input.contextMenuPending) { input.contextMenuPending(); }
+    var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
+    if (!pos || presto) { return } // Opera is difficult.
+
+    // Reset the current text selection only if the click is done outside of the selection
+    // and 'resetSelectionOnContextMenu' option is true.
+    var reset = cm.options.resetSelectionOnContextMenu;
+    if (reset && cm.doc.sel.contains(pos) == -1)
+      { operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll); }
+
+    var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText;
+    var wrapperBox = input.wrapper.offsetParent.getBoundingClientRect();
+    input.wrapper.style.cssText = "position: static";
+    te.style.cssText = "position: absolute; width: 30px; height: 30px;\n      top: " + (e.clientY - wrapperBox.top - 5) + "px; left: " + (e.clientX - wrapperBox.left - 5) + "px;\n      z-index: 1000; background: " + (ie ? "rgba(255, 255, 255, .05)" : "transparent") + ";\n      outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
+    var oldScrollY;
+    if (webkit) { oldScrollY = window.scrollY; } // Work around Chrome issue (#2712)
+    display.input.focus();
+    if (webkit) { window.scrollTo(null, oldScrollY); }
+    display.input.reset();
+    // Adds "Select all" to context menu in FF
+    if (!cm.somethingSelected()) { te.value = input.prevInput = " "; }
+    input.contextMenuPending = rehide;
+    display.selForContextMenu = cm.doc.sel;
+    clearTimeout(display.detectingSelectAll);
+
+    // Select-all will be greyed out if there's nothing to select, so
+    // this adds a zero-width space so that we can later check whether
+    // it got selected.
+    function prepareSelectAllHack() {
+      if (te.selectionStart != null) {
+        var selected = cm.somethingSelected();
+        var extval = "\u200b" + (selected ? te.value : "");
+        te.value = "\u21da"; // Used to catch context-menu undo
+        te.value = extval;
+        input.prevInput = selected ? "" : "\u200b";
+        te.selectionStart = 1; te.selectionEnd = extval.length;
+        // Re-set this, in case some other handler touched the
+        // selection in the meantime.
+        display.selForContextMenu = cm.doc.sel;
+      }
+    }
+    function rehide() {
+      if (input.contextMenuPending != rehide) { return }
+      input.contextMenuPending = false;
+      input.wrapper.style.cssText = oldWrapperCSS;
+      te.style.cssText = oldCSS;
+      if (ie && ie_version < 9) { display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos); }
+
+      // Try to detect the user choosing select-all
+      if (te.selectionStart != null) {
+        if (!ie || (ie && ie_version < 9)) { prepareSelectAllHack(); }
+        var i = 0, poll = function () {
+          if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
+              te.selectionEnd > 0 && input.prevInput == "\u200b") {
+            operation(cm, selectAll)(cm);
+          } else if (i++ < 10) {
+            display.detectingSelectAll = setTimeout(poll, 500);
+          } else {
+            display.selForContextMenu = null;
+            display.input.reset();
+          }
+        };
+        display.detectingSelectAll = setTimeout(poll, 200);
+      }
+    }
+
+    if (ie && ie_version >= 9) { prepareSelectAllHack(); }
+    if (captureRightClick) {
+      e_stop(e);
+      var mouseup = function () {
+        off(window, "mouseup", mouseup);
+        setTimeout(rehide, 20);
+      };
+      on(window, "mouseup", mouseup);
+    } else {
+      setTimeout(rehide, 50);
+    }
+  };
+
+  TextareaInput.prototype.readOnlyChanged = function (val) {
+    if (!val) { this.reset(); }
+    this.textarea.disabled = val == "nocursor";
+  };
+
+  TextareaInput.prototype.setUneditable = function () {};
+
+  TextareaInput.prototype.needsContentAttribute = false;
+
+  function fromTextArea(textarea, options) {
+    options = options ? copyObj(options) : {};
+    options.value = textarea.value;
+    if (!options.tabindex && textarea.tabIndex)
+      { options.tabindex = textarea.tabIndex; }
+    if (!options.placeholder && textarea.placeholder)
+      { options.placeholder = textarea.placeholder; }
+    // Set autofocus to true if this textarea is focused, or if it has
+    // autofocus and no other element is focused.
+    if (options.autofocus == null) {
+      var hasFocus = activeElt();
+      options.autofocus = hasFocus == textarea ||
+        textarea.getAttribute("autofocus") != null && hasFocus == document.body;
+    }
+
+    function save() {textarea.value = cm.getValue();}
+
+    var realSubmit;
+    if (textarea.form) {
+      on(textarea.form, "submit", save);
+      // Deplorable hack to make the submit method do the right thing.
+      if (!options.leaveSubmitMethodAlone) {
+        var form = textarea.form;
+        realSubmit = form.submit;
+        try {
+          var wrappedSubmit = form.submit = function () {
+            save();
+            form.submit = realSubmit;
+            form.submit();
+            form.submit = wrappedSubmit;
+          };
+        } catch(e) {}
+      }
+    }
+
+    options.finishInit = function (cm) {
+      cm.save = save;
+      cm.getTextArea = function () { return textarea; };
+      cm.toTextArea = function () {
+        cm.toTextArea = isNaN; // Prevent this from being ran twice
+        save();
+        textarea.parentNode.removeChild(cm.getWrapperElement());
+        textarea.style.display = "";
+        if (textarea.form) {
+          off(textarea.form, "submit", save);
+          if (typeof textarea.form.submit == "function")
+            { textarea.form.submit = realSubmit; }
+        }
+      };
+    };
+
+    textarea.style.display = "none";
+    var cm = CodeMirror(function (node) { return textarea.parentNode.insertBefore(node, textarea.nextSibling); },
+      options);
+    return cm
+  }
+
+  function addLegacyProps(CodeMirror) {
+    CodeMirror.off = off;
+    CodeMirror.on = on;
+    CodeMirror.wheelEventPixels = wheelEventPixels;
+    CodeMirror.Doc = Doc;
+    CodeMirror.splitLines = splitLinesAuto;
+    CodeMirror.countColumn = countColumn;
+    CodeMirror.findColumn = findColumn;
+    CodeMirror.isWordChar = isWordCharBasic;
+    CodeMirror.Pass = Pass;
+    CodeMirror.signal = signal;
+    CodeMirror.Line = Line;
+    CodeMirror.changeEnd = changeEnd;
+    CodeMirror.scrollbarModel = scrollbarModel;
+    CodeMirror.Pos = Pos;
+    CodeMirror.cmpPos = cmp;
+    CodeMirror.modes = modes;
+    CodeMirror.mimeModes = mimeModes;
+    CodeMirror.resolveMode = resolveMode;
+    CodeMirror.getMode = getMode;
+    CodeMirror.modeExtensions = modeExtensions;
+    CodeMirror.extendMode = extendMode;
+    CodeMirror.copyState = copyState;
+    CodeMirror.startState = startState;
+    CodeMirror.innerMode = innerMode;
+    CodeMirror.commands = commands;
+    CodeMirror.keyMap = keyMap;
+    CodeMirror.keyName = keyName;
+    CodeMirror.isModifierKey = isModifierKey;
+    CodeMirror.lookupKey = lookupKey;
+    CodeMirror.normalizeKeyMap = normalizeKeyMap;
+    CodeMirror.StringStream = StringStream;
+    CodeMirror.SharedTextMarker = SharedTextMarker;
+    CodeMirror.TextMarker = TextMarker;
+    CodeMirror.LineWidget = LineWidget;
+    CodeMirror.e_preventDefault = e_preventDefault;
+    CodeMirror.e_stopPropagation = e_stopPropagation;
+    CodeMirror.e_stop = e_stop;
+    CodeMirror.addClass = addClass;
+    CodeMirror.contains = contains;
+    CodeMirror.rmClass = rmClass;
+    CodeMirror.keyNames = keyNames;
+  }
+
+  // EDITOR CONSTRUCTOR
+
+  defineOptions(CodeMirror);
+
+  addEditorMethods(CodeMirror);
+
+  // Set up methods on CodeMirror's prototype to redirect to the editor's document.
+  var dontDelegate = "iter insert remove copy getEditor constructor".split(" ");
+  for (var prop in Doc.prototype) { if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
+    { CodeMirror.prototype[prop] = (function(method) {
+      return function() {return method.apply(this.doc, arguments)}
+    })(Doc.prototype[prop]); } }
+
+  eventMixin(Doc);
+  CodeMirror.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput};
+
+  // Extra arguments are stored as the mode's dependencies, which is
+  // used by (legacy) mechanisms like loadmode.js to automatically
+  // load a mode. (Preferred mechanism is the require/define calls.)
+  CodeMirror.defineMode = function(name/*, mode, …*/) {
+    if (!CodeMirror.defaults.mode && name != "null") { CodeMirror.defaults.mode = name; }
+    defineMode.apply(this, arguments);
+  };
+
+  CodeMirror.defineMIME = defineMIME;
+
+  // Minimal default mode.
+  CodeMirror.defineMode("null", function () { return ({token: function (stream) { return stream.skipToEnd(); }}); });
+  CodeMirror.defineMIME("text/plain", "null");
+
+  // EXTENSIONS
+
+  CodeMirror.defineExtension = function (name, func) {
+    CodeMirror.prototype[name] = func;
+  };
+  CodeMirror.defineDocExtension = function (name, func) {
+    Doc.prototype[name] = func;
+  };
+
+  CodeMirror.fromTextArea = fromTextArea;
+
+  addLegacyProps(CodeMirror);
+
+  CodeMirror.version = "5.47.0";
+
+  return CodeMirror;
+
+})));
diff --git a/javascripts/lib/lint.js b/javascripts/lib/lint.js
new file mode 100644
index 000000000..aa75ba0e8
--- /dev/null
+++ b/javascripts/lib/lint.js
@@ -0,0 +1,252 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+  var GUTTER_ID = "CodeMirror-lint-markers";
+
+  function showTooltip(e, content) {
+    var tt = document.createElement("div");
+    tt.className = "CodeMirror-lint-tooltip";
+    tt.appendChild(content.cloneNode(true));
+    document.body.appendChild(tt);
+
+    function position(e) {
+      if (!tt.parentNode) return CodeMirror.off(document, "mousemove", position);
+      tt.style.top = Math.max(0, e.clientY - tt.offsetHeight - 5) + "px";
+      tt.style.left = (e.clientX + 5) + "px";
+    }
+    CodeMirror.on(document, "mousemove", position);
+    position(e);
+    if (tt.style.opacity != null) tt.style.opacity = 1;
+    return tt;
+  }
+  function rm(elt) {
+    if (elt.parentNode) elt.parentNode.removeChild(elt);
+  }
+  function hideTooltip(tt) {
+    if (!tt.parentNode) return;
+    if (tt.style.opacity == null) rm(tt);
+    tt.style.opacity = 0;
+    setTimeout(function() { rm(tt); }, 600);
+  }
+
+  function showTooltipFor(e, content, node) {
+    var tooltip = showTooltip(e, content);
+    function hide() {
+      CodeMirror.off(node, "mouseout", hide);
+      if (tooltip) { hideTooltip(tooltip); tooltip = null; }
+    }
+    var poll = setInterval(function() {
+      if (tooltip) for (var n = node;; n = n.parentNode) {
+        if (n && n.nodeType == 11) n = n.host;
+        if (n == document.body) return;
+        if (!n) { hide(); break; }
+      }
+      if (!tooltip) return clearInterval(poll);
+    }, 400);
+    CodeMirror.on(node, "mouseout", hide);
+  }
+
+  function LintState(cm, options, hasGutter) {
+    this.marked = [];
+    this.options = options;
+    this.timeout = null;
+    this.hasGutter = hasGutter;
+    this.onMouseOver = function(e) { onMouseOver(cm, e); };
+    this.waitingFor = 0
+  }
+
+  function parseOptions(_cm, options) {
+    if (options instanceof Function) return {getAnnotations: options};
+    if (!options || options === true) options = {};
+    return options;
+  }
+
+  function clearMarks(cm) {
+    var state = cm.state.lint;
+    if (state.hasGutter) cm.clearGutter(GUTTER_ID);
+    for (var i = 0; i < state.marked.length; ++i)
+      state.marked[i].clear();
+    state.marked.length = 0;
+  }
+
+  function makeMarker(labels, severity, multiple, tooltips) {
+    var marker = document.createElement("div"), inner = marker;
+    marker.className = "CodeMirror-lint-marker-" + severity;
+    if (multiple) {
+      inner = marker.appendChild(document.createElement("div"));
+      inner.className = "CodeMirror-lint-marker-multiple";
+    }
+
+    if (tooltips != false) CodeMirror.on(inner, "mouseover", function(e) {
+      showTooltipFor(e, labels, inner);
+    });
+
+    return marker;
+  }
+
+  function getMaxSeverity(a, b) {
+    if (a == "error") return a;
+    else return b;
+  }
+
+  function groupByLine(annotations) {
+    var lines = [];
+    for (var i = 0; i < annotations.length; ++i) {
+      var ann = annotations[i], line = ann.from.line;
+      (lines[line] || (lines[line] = [])).push(ann);
+    }
+    return lines;
+  }
+
+  function annotationTooltip(ann) {
+    var severity = ann.severity;
+    if (!severity) severity = "error";
+    var tip = document.createElement("div");
+    tip.className = "CodeMirror-lint-message-" + severity;
+    if (typeof ann.messageHTML != 'undefined') {
+        tip.innerHTML = ann.messageHTML;
+    } else {
+        tip.appendChild(document.createTextNode(ann.message));
+    }
+    return tip;
+  }
+
+  function lintAsync(cm, getAnnotations, passOptions) {
+    var state = cm.state.lint
+    var id = ++state.waitingFor
+    function abort() {
+      id = -1
+      cm.off("change", abort)
+    }
+    cm.on("change", abort)
+    getAnnotations(cm.getValue(), function(annotations, arg2) {
+      cm.off("change", abort)
+      if (state.waitingFor != id) return
+      if (arg2 && annotations instanceof CodeMirror) annotations = arg2
+      cm.operation(function() {updateLinting(cm, annotations)})
+    }, passOptions, cm);
+  }
+
+  function startLinting(cm) {
+    var state = cm.state.lint, options = state.options;
+    /*
+     * Passing rules in `options` property prevents JSHint (and other linters) from complaining
+     * about unrecognized rules like `onUpdateLinting`, `delay`, `lintOnChange`, etc.
+     */
+    var passOptions = options.options || options;
+    var getAnnotations = options.getAnnotations || cm.getHelper(CodeMirror.Pos(0, 0), "lint");
+    if (!getAnnotations) return;
+    if (options.async || getAnnotations.async) {
+      lintAsync(cm, getAnnotations, passOptions)
+    } else {
+      var annotations = getAnnotations(cm.getValue(), passOptions, cm);
+      if (!annotations) return;
+      if (annotations.then) annotations.then(function(issues) {
+        cm.operation(function() {updateLinting(cm, issues)})
+      });
+      else cm.operation(function() {updateLinting(cm, annotations)})
+    }
+  }
+
+  function updateLinting(cm, annotationsNotSorted) {
+    clearMarks(cm);
+    var state = cm.state.lint, options = state.options;
+
+    var annotations = groupByLine(annotationsNotSorted);
+
+    for (var line = 0; line < annotations.length; ++line) {
+      var anns = annotations[line];
+      if (!anns) continue;
+
+      var maxSeverity = null;
+      var tipLabel = state.hasGutter && document.createDocumentFragment();
+
+      for (var i = 0; i < anns.length; ++i) {
+        var ann = anns[i];
+        var severity = ann.severity;
+        if (!severity) severity = "error";
+        maxSeverity = getMaxSeverity(maxSeverity, severity);
+
+        if (options.formatAnnotation) ann = options.formatAnnotation(ann);
+        if (state.hasGutter) tipLabel.appendChild(annotationTooltip(ann));
+
+        if (ann.to) state.marked.push(cm.markText(ann.from, ann.to, {
+          className: "CodeMirror-lint-mark-" + severity,
+          __annotation: ann
+        }));
+      }
+
+      if (state.hasGutter)
+        cm.setGutterMarker(line, GUTTER_ID, makeMarker(tipLabel, maxSeverity, anns.length > 1,
+                                                       state.options.tooltips));
+    }
+    if (options.onUpdateLinting) options.onUpdateLinting(annotationsNotSorted, annotations, cm);
+  }
+
+  function onChange(cm) {
+    var state = cm.state.lint;
+    if (!state) return;
+    clearTimeout(state.timeout);
+    state.timeout = setTimeout(function(){startLinting(cm);}, state.options.delay || 500);
+  }
+
+  function popupTooltips(annotations, e) {
+    var target = e.target || e.srcElement;
+    var tooltip = document.createDocumentFragment();
+    for (var i = 0; i < annotations.length; i++) {
+      var ann = annotations[i];
+      tooltip.appendChild(annotationTooltip(ann));
+    }
+    showTooltipFor(e, tooltip, target);
+  }
+
+  function onMouseOver(cm, e) {
+    var target = e.target || e.srcElement;
+    if (!/\bCodeMirror-lint-mark-/.test(target.className)) return;
+    var box = target.getBoundingClientRect(), x = (box.left + box.right) / 2, y = (box.top + box.bottom) / 2;
+    var spans = cm.findMarksAt(cm.coordsChar({left: x, top: y}, "client"));
+
+    var annotations = [];
+    for (var i = 0; i < spans.length; ++i) {
+      var ann = spans[i].__annotation;
+      if (ann) annotations.push(ann);
+    }
+    if (annotations.length) popupTooltips(annotations, e);
+  }
+
+  CodeMirror.defineOption("lint", false, function(cm, val, old) {
+    if (old && old != CodeMirror.Init) {
+      clearMarks(cm);
+      if (cm.state.lint.options.lintOnChange !== false)
+        cm.off("change", onChange);
+      CodeMirror.off(cm.getWrapperElement(), "mouseover", cm.state.lint.onMouseOver);
+      clearTimeout(cm.state.lint.timeout);
+      delete cm.state.lint;
+    }
+
+    if (val) {
+      var gutters = cm.getOption("gutters"), hasLintGutter = false;
+      for (var i = 0; i < gutters.length; ++i) if (gutters[i] == GUTTER_ID) hasLintGutter = true;
+      var state = cm.state.lint = new LintState(cm, parseOptions(cm, val), hasLintGutter);
+      if (state.options.lintOnChange !== false)
+        cm.on("change", onChange);
+      if (state.options.tooltips != false && state.options.tooltips != "gutter")
+        CodeMirror.on(cm.getWrapperElement(), "mouseover", state.onMouseOver);
+
+      startLinting(cm);
+    }
+  });
+
+  CodeMirror.defineExtension("performLint", function() {
+    if (this.state.lint) startLinting(this);
+  });
+});
diff --git a/javascripts/lib/show-hint.js b/javascripts/lib/show-hint.js
new file mode 100644
index 000000000..0172cc8e7
--- /dev/null
+++ b/javascripts/lib/show-hint.js
@@ -0,0 +1,460 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+
+  var HINT_ELEMENT_CLASS        = "CodeMirror-hint";
+  var ACTIVE_HINT_ELEMENT_CLASS = "CodeMirror-hint-active";
+
+  // This is the old interface, kept around for now to stay
+  // backwards-compatible.
+  CodeMirror.showHint = function(cm, getHints, options) {
+    if (!getHints) return cm.showHint(options);
+    if (options && options.async) getHints.async = true;
+    var newOpts = {hint: getHints};
+    if (options) for (var prop in options) newOpts[prop] = options[prop];
+    return cm.showHint(newOpts);
+  };
+
+  CodeMirror.defineExtension("showHint", function(options) {
+    options = parseOptions(this, this.getCursor("start"), options);
+    var selections = this.listSelections()
+    if (selections.length > 1) return;
+    // By default, don't allow completion when something is selected.
+    // A hint function can have a `supportsSelection` property to
+    // indicate that it can handle selections.
+    if (this.somethingSelected()) {
+      if (!options.hint.supportsSelection) return;
+      // Don't try with cross-line selections
+      for (var i = 0; i < selections.length; i++)
+        if (selections[i].head.line != selections[i].anchor.line) return;
+    }
+
+    if (this.state.completionActive) this.state.completionActive.close();
+    var completion = this.state.completionActive = new Completion(this, options);
+    if (!completion.options.hint) return;
+
+    CodeMirror.signal(this, "startCompletion", this);
+    completion.update(true);
+  });
+
+  CodeMirror.defineExtension("closeHint", function() {
+    if (this.state.completionActive) this.state.completionActive.close()
+  })
+
+  function Completion(cm, options) {
+    this.cm = cm;
+    this.options = options;
+    this.widget = null;
+    this.debounce = 0;
+    this.tick = 0;
+    this.startPos = this.cm.getCursor("start");
+    this.startLen = this.cm.getLine(this.startPos.line).length - this.cm.getSelection().length;
+
+    var self = this;
+    cm.on("cursorActivity", this.activityFunc = function() { self.cursorActivity(); });
+  }
+
+  var requestAnimationFrame = window.requestAnimationFrame || function(fn) {
+    return setTimeout(fn, 1000/60);
+  };
+  var cancelAnimationFrame = window.cancelAnimationFrame || clearTimeout;
+
+  Completion.prototype = {
+    close: function() {
+      if (!this.active()) return;
+      this.cm.state.completionActive = null;
+      this.tick = null;
+      this.cm.off("cursorActivity", this.activityFunc);
+
+      if (this.widget && this.data) CodeMirror.signal(this.data, "close");
+      if (this.widget) this.widget.close();
+      CodeMirror.signal(this.cm, "endCompletion", this.cm);
+    },
+
+    active: function() {
+      return this.cm.state.completionActive == this;
+    },
+
+    pick: function(data, i) {
+      var completion = data.list[i];
+      if (completion.hint) completion.hint(this.cm, data, completion);
+      else this.cm.replaceRange(getText(completion), completion.from || data.from,
+                                completion.to || data.to, "complete");
+      CodeMirror.signal(data, "pick", completion);
+      this.close();
+    },
+
+    cursorActivity: function() {
+      if (this.debounce) {
+        cancelAnimationFrame(this.debounce);
+        this.debounce = 0;
+      }
+
+      var pos = this.cm.getCursor(), line = this.cm.getLine(pos.line);
+      if (pos.line != this.startPos.line || line.length - pos.ch != this.startLen - this.startPos.ch ||
+          pos.ch < this.startPos.ch || this.cm.somethingSelected() ||
+          (!pos.ch || this.options.closeCharacters.test(line.charAt(pos.ch - 1)))) {
+        this.close();
+      } else {
+        var self = this;
+        this.debounce = requestAnimationFrame(function() {self.update();});
+        if (this.widget) this.widget.disable();
+      }
+    },
+
+    update: function(first) {
+      if (this.tick == null) return
+      var self = this, myTick = ++this.tick
+      fetchHints(this.options.hint, this.cm, this.options, function(data) {
+        if (self.tick == myTick) self.finishUpdate(data, first)
+      })
+    },
+
+    finishUpdate: function(data, first) {
+      if (this.data) CodeMirror.signal(this.data, "update");
+
+      var picked = (this.widget && this.widget.picked) || (first && this.options.completeSingle);
+      if (this.widget) this.widget.close();
+
+      this.data = data;
+
+      if (data && data.list.length) {
+        if (picked && data.list.length == 1) {
+          this.pick(data, 0);
+        } else {
+          this.widget = new Widget(this, data);
+          CodeMirror.signal(data, "shown");
+        }
+      }
+    }
+  };
+
+  function parseOptions(cm, pos, options) {
+    var editor = cm.options.hintOptions;
+    var out = {};
+    for (var prop in defaultOptions) out[prop] = defaultOptions[prop];
+    if (editor) for (var prop in editor)
+      if (editor[prop] !== undefined) out[prop] = editor[prop];
+    if (options) for (var prop in options)
+      if (options[prop] !== undefined) out[prop] = options[prop];
+    if (out.hint.resolve) out.hint = out.hint.resolve(cm, pos)
+    return out;
+  }
+
+  function getText(completion) {
+    if (typeof completion == "string") return completion;
+    else return completion.text;
+  }
+
+  function buildKeyMap(completion, handle) {
+    var baseMap = {
+      Up: function() {handle.moveFocus(-1);},
+      Down: function() {handle.moveFocus(1);},
+      PageUp: function() {handle.moveFocus(-handle.menuSize() + 1, true);},
+      PageDown: function() {handle.moveFocus(handle.menuSize() - 1, true);},
+      Home: function() {handle.setFocus(0);},
+      End: function() {handle.setFocus(handle.length - 1);},
+      Enter: handle.pick,
+      Tab: handle.pick,
+      Esc: handle.close
+    };
+
+    var mac = /Mac/.test(navigator.platform);
+
+    if (mac) {
+      baseMap["Ctrl-P"] = function() {handle.moveFocus(-1);};
+      baseMap["Ctrl-N"] = function() {handle.moveFocus(1);};
+    }
+
+    var custom = completion.options.customKeys;
+    var ourMap = custom ? {} : baseMap;
+    function addBinding(key, val) {
+      var bound;
+      if (typeof val != "string")
+        bound = function(cm) { return val(cm, handle); };
+      // This mechanism is deprecated
+      else if (baseMap.hasOwnProperty(val))
+        bound = baseMap[val];
+      else
+        bound = val;
+      ourMap[key] = bound;
+    }
+    if (custom)
+      for (var key in custom) if (custom.hasOwnProperty(key))
+        addBinding(key, custom[key]);
+    var extra = completion.options.extraKeys;
+    if (extra)
+      for (var key in extra) if (extra.hasOwnProperty(key))
+        addBinding(key, extra[key]);
+    return ourMap;
+  }
+
+  function getHintElement(hintsElement, el) {
+    while (el && el != hintsElement) {
+      if (el.nodeName.toUpperCase() === "LI" && el.parentNode == hintsElement) return el;
+      el = el.parentNode;
+    }
+  }
+
+  function Widget(completion, data) {
+    this.completion = completion;
+    this.data = data;
+    this.picked = false;
+    var widget = this, cm = completion.cm;
+    var ownerDocument = cm.getInputField().ownerDocument;
+    var parentWindow = ownerDocument.defaultView || ownerDocument.parentWindow;
+
+    var hints = this.hints = ownerDocument.createElement("ul");
+    var theme = completion.cm.options.theme;
+    hints.className = "CodeMirror-hints " + theme;
+    this.selectedHint = data.selectedHint || 0;
+
+    var completions = data.list;
+    for (var i = 0; i < completions.length; ++i) {
+      var elt = hints.appendChild(ownerDocument.createElement("li")), cur = completions[i];
+      var className = HINT_ELEMENT_CLASS + (i != this.selectedHint ? "" : " " + ACTIVE_HINT_ELEMENT_CLASS);
+      if (cur.className != null) className = cur.className + " " + className;
+      elt.className = className;
+      if (cur.render) cur.render(elt, data, cur);
+      else elt.appendChild(ownerDocument.createTextNode(cur.displayText || getText(cur)));
+      elt.hintId = i;
+    }
+
+    var container = completion.options.container || ownerDocument.body;
+    var pos = cm.cursorCoords(completion.options.alignWithWord ? data.from : null);
+    var left = pos.left, top = pos.bottom, below = true;
+    var offsetLeft = 0, offsetTop = 0;
+    if (container !== ownerDocument.body) {
+      // We offset the cursor position because left and top are relative to the offsetParent's top left corner.
+      var isContainerPositioned = ['absolute', 'relative', 'fixed'].indexOf(parentWindow.getComputedStyle(container).position) !== -1;
+      var offsetParent = isContainerPositioned ? container : container.offsetParent;
+      var offsetParentPosition = offsetParent.getBoundingClientRect();
+      var bodyPosition = ownerDocument.body.getBoundingClientRect();
+      offsetLeft = (offsetParentPosition.left - bodyPosition.left);
+      offsetTop = (offsetParentPosition.top - bodyPosition.top);
+    }
+    hints.style.left = (left - offsetLeft) + "px";
+    hints.style.top = (top - offsetTop) + "px";
+
+    // If we're at the edge of the screen, then we want the menu to appear on the left of the cursor.
+    var winW = parentWindow.innerWidth || Math.max(ownerDocument.body.offsetWidth, ownerDocument.documentElement.offsetWidth);
+    var winH = parentWindow.innerHeight || Math.max(ownerDocument.body.offsetHeight, ownerDocument.documentElement.offsetHeight);
+    container.appendChild(hints);
+    var box = hints.getBoundingClientRect(), overlapY = box.bottom - winH;
+    var scrolls = hints.scrollHeight > hints.clientHeight + 1
+    var startScroll = cm.getScrollInfo();
+
+    if (overlapY > 0) {
+      var height = box.bottom - box.top, curTop = pos.top - (pos.bottom - box.top);
+      if (curTop - height > 0) { // Fits above cursor
+        hints.style.top = (top = pos.top - height - offsetTop) + "px";
+        below = false;
+      } else if (height > winH) {
+        hints.style.height = (winH - 5) + "px";
+        hints.style.top = (top = pos.bottom - box.top - offsetTop) + "px";
+        var cursor = cm.getCursor();
+        if (data.from.ch != cursor.ch) {
+          pos = cm.cursorCoords(cursor);
+          hints.style.left = (left = pos.left - offsetLeft) + "px";
+          box = hints.getBoundingClientRect();
+        }
+      }
+    }
+    var overlapX = box.right - winW;
+    if (overlapX > 0) {
+      if (box.right - box.left > winW) {
+        hints.style.width = (winW - 5) + "px";
+        overlapX -= (box.right - box.left) - winW;
+      }
+      hints.style.left = (left = pos.left - overlapX - offsetLeft) + "px";
+    }
+    if (scrolls) for (var node = hints.firstChild; node; node = node.nextSibling)
+      node.style.paddingRight = cm.display.nativeBarWidth + "px"
+
+    cm.addKeyMap(this.keyMap = buildKeyMap(completion, {
+      moveFocus: function(n, avoidWrap) { widget.changeActive(widget.selectedHint + n, avoidWrap); },
+      setFocus: function(n) { widget.changeActive(n); },
+      menuSize: function() { return widget.screenAmount(); },
+      length: completions.length,
+      close: function() { completion.close(); },
+      pick: function() { widget.pick(); },
+      data: data
+    }));
+
+    if (completion.options.closeOnUnfocus) {
+      var closingOnBlur;
+      cm.on("blur", this.onBlur = function() { closingOnBlur = setTimeout(function() { completion.close(); }, 100); });
+      cm.on("focus", this.onFocus = function() { clearTimeout(closingOnBlur); });
+    }
+
+    cm.on("scroll", this.onScroll = function() {
+      var curScroll = cm.getScrollInfo(), editor = cm.getWrapperElement().getBoundingClientRect();
+      var newTop = top + startScroll.top - curScroll.top;
+      var point = newTop - (parentWindow.pageYOffset || (ownerDocument.documentElement || ownerDocument.body).scrollTop);
+      if (!below) point += hints.offsetHeight;
+      if (point <= editor.top || point >= editor.bottom) return completion.close();
+      hints.style.top = newTop + "px";
+      hints.style.left = (left + startScroll.left - curScroll.left) + "px";
+    });
+
+    CodeMirror.on(hints, "dblclick", function(e) {
+      var t = getHintElement(hints, e.target || e.srcElement);
+      if (t && t.hintId != null) {widget.changeActive(t.hintId); widget.pick();}
+    });
+
+    CodeMirror.on(hints, "click", function(e) {
+      var t = getHintElement(hints, e.target || e.srcElement);
+      if (t && t.hintId != null) {
+        widget.changeActive(t.hintId);
+        if (completion.options.completeOnSingleClick) widget.pick();
+      }
+    });
+
+    CodeMirror.on(hints, "mousedown", function() {
+      setTimeout(function(){cm.focus();}, 20);
+    });
+
+    CodeMirror.signal(data, "select", completions[this.selectedHint], hints.childNodes[this.selectedHint]);
+    return true;
+  }
+
+  Widget.prototype = {
+    close: function() {
+      if (this.completion.widget != this) return;
+      this.completion.widget = null;
+      this.hints.parentNode.removeChild(this.hints);
+      this.completion.cm.removeKeyMap(this.keyMap);
+
+      var cm = this.completion.cm;
+      if (this.completion.options.closeOnUnfocus) {
+        cm.off("blur", this.onBlur);
+        cm.off("focus", this.onFocus);
+      }
+      cm.off("scroll", this.onScroll);
+    },
+
+    disable: function() {
+      this.completion.cm.removeKeyMap(this.keyMap);
+      var widget = this;
+      this.keyMap = {Enter: function() { widget.picked = true; }};
+      this.completion.cm.addKeyMap(this.keyMap);
+    },
+
+    pick: function() {
+      this.completion.pick(this.data, this.selectedHint);
+    },
+
+    changeActive: function(i, avoidWrap) {
+      if (i >= this.data.list.length)
+        i = avoidWrap ? this.data.list.length - 1 : 0;
+      else if (i < 0)
+        i = avoidWrap ? 0  : this.data.list.length - 1;
+      if (this.selectedHint == i) return;
+      var node = this.hints.childNodes[this.selectedHint];
+      if (node) node.className = node.className.replace(" " + ACTIVE_HINT_ELEMENT_CLASS, "");
+      node = this.hints.childNodes[this.selectedHint = i];
+      node.className += " " + ACTIVE_HINT_ELEMENT_CLASS;
+      if (node.offsetTop < this.hints.scrollTop)
+        this.hints.scrollTop = node.offsetTop - 3;
+      else if (node.offsetTop + node.offsetHeight > this.hints.scrollTop + this.hints.clientHeight)
+        this.hints.scrollTop = node.offsetTop + node.offsetHeight - this.hints.clientHeight + 3;
+      CodeMirror.signal(this.data, "select", this.data.list[this.selectedHint], node);
+    },
+
+    screenAmount: function() {
+      return Math.floor(this.hints.clientHeight / this.hints.firstChild.offsetHeight) || 1;
+    }
+  };
+
+  function applicableHelpers(cm, helpers) {
+    if (!cm.somethingSelected()) return helpers
+    var result = []
+    for (var i = 0; i < helpers.length; i++)
+      if (helpers[i].supportsSelection) result.push(helpers[i])
+    return result
+  }
+
+  function fetchHints(hint, cm, options, callback) {
+    if (hint.async) {
+      hint(cm, callback, options)
+    } else {
+      var result = hint(cm, options)
+      if (result && result.then) result.then(callback)
+      else callback(result)
+    }
+  }
+
+  function resolveAutoHints(cm, pos) {
+    var helpers = cm.getHelpers(pos, "hint"), words
+    if (helpers.length) {
+      var resolved = function(cm, callback, options) {
+        var app = applicableHelpers(cm, helpers);
+        function run(i) {
+          if (i == app.length) return callback(null)
+          fetchHints(app[i], cm, options, function(result) {
+            if (result && result.list.length > 0) callback(result)
+            else run(i + 1)
+          })
+        }
+        run(0)
+      }
+      resolved.async = true
+      resolved.supportsSelection = true
+      return resolved
+    } else if (words = cm.getHelper(cm.getCursor(), "hintWords")) {
+      return function(cm) { return CodeMirror.hint.fromList(cm, {words: words}) }
+    } else if (CodeMirror.hint.anyword) {
+      return function(cm, options) { return CodeMirror.hint.anyword(cm, options) }
+    } else {
+      return function() {}
+    }
+  }
+
+  CodeMirror.registerHelper("hint", "auto", {
+    resolve: resolveAutoHints
+  });
+
+  CodeMirror.registerHelper("hint", "fromList", function(cm, options) {
+    var cur = cm.getCursor(), token = cm.getTokenAt(cur)
+    var term, from = CodeMirror.Pos(cur.line, token.start), to = cur
+    if (token.start < cur.ch && /\w/.test(token.string.charAt(cur.ch - token.start - 1))) {
+      term = token.string.substr(0, cur.ch - token.start)
+    } else {
+      term = ""
+      from = cur
+    }
+    var found = [];
+    for (var i = 0; i < options.words.length; i++) {
+      var word = options.words[i];
+      if (word.slice(0, term.length) == term)
+        found.push(word);
+    }
+
+    if (found.length) return {list: found, from: from, to: to};
+  });
+
+  CodeMirror.commands.autocomplete = CodeMirror.showHint;
+
+  var defaultOptions = {
+    hint: CodeMirror.hint.auto,
+    completeSingle: true,
+    alignWithWord: true,
+    closeCharacters: /[\s()\[\]{};:>,]/,
+    closeOnUnfocus: true,
+    completeOnSingleClick: true,
+    container: null,
+    customKeys: null,
+    extraKeys: null
+  };
+
+  CodeMirror.defineOption("hintOptions", null);
+});
diff --git a/javascripts/lib/simple.js b/javascripts/lib/simple.js
new file mode 100644
index 000000000..655f99147
--- /dev/null
+++ b/javascripts/lib/simple.js
@@ -0,0 +1,216 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+
+  CodeMirror.defineSimpleMode = function(name, states) {
+    CodeMirror.defineMode(name, function(config) {
+      return CodeMirror.simpleMode(config, states);
+    });
+  };
+
+  CodeMirror.simpleMode = function(config, states) {
+    ensureState(states, "start");
+    var states_ = {}, meta = states.meta || {}, hasIndentation = false;
+    for (var state in states) if (state != meta && states.hasOwnProperty(state)) {
+      var list = states_[state] = [], orig = states[state];
+      for (var i = 0; i < orig.length; i++) {
+        var data = orig[i];
+        list.push(new Rule(data, states));
+        if (data.indent || data.dedent) hasIndentation = true;
+      }
+    }
+    var mode = {
+      startState: function() {
+        return {state: "start", pending: null,
+                local: null, localState: null,
+                indent: hasIndentation ? [] : null};
+      },
+      copyState: function(state) {
+        var s = {state: state.state, pending: state.pending,
+                 local: state.local, localState: null,
+                 indent: state.indent && state.indent.slice(0)};
+        if (state.localState)
+          s.localState = CodeMirror.copyState(state.local.mode, state.localState);
+        if (state.stack)
+          s.stack = state.stack.slice(0);
+        for (var pers = state.persistentStates; pers; pers = pers.next)
+          s.persistentStates = {mode: pers.mode,
+                                spec: pers.spec,
+                                state: pers.state == state.localState ? s.localState : CodeMirror.copyState(pers.mode, pers.state),
+                                next: s.persistentStates};
+        return s;
+      },
+      token: tokenFunction(states_, config),
+      innerMode: function(state) { return state.local && {mode: state.local.mode, state: state.localState}; },
+      indent: indentFunction(states_, meta)
+    };
+    if (meta) for (var prop in meta) if (meta.hasOwnProperty(prop))
+      mode[prop] = meta[prop];
+    return mode;
+  };
+
+  function ensureState(states, name) {
+    if (!states.hasOwnProperty(name))
+      throw new Error("Undefined state " + name + " in simple mode");
+  }
+
+  function toRegex(val, caret) {
+    if (!val) return /(?:)/;
+    var flags = "";
+    if (val instanceof RegExp) {
+      if (val.ignoreCase) flags = "i";
+      val = val.source;
+    } else {
+      val = String(val);
+    }
+    return new RegExp((caret === false ? "" : "^") + "(?:" + val + ")", flags);
+  }
+
+  function asToken(val) {
+    if (!val) return null;
+    if (val.apply) return val
+    if (typeof val == "string") return val.replace(/\./g, " ");
+    var result = [];
+    for (var i = 0; i < val.length; i++)
+      result.push(val[i] && val[i].replace(/\./g, " "));
+    return result;
+  }
+
+  function Rule(data, states) {
+    if (data.next || data.push) ensureState(states, data.next || data.push);
+    this.regex = toRegex(data.regex);
+    this.token = asToken(data.token);
+    this.data = data;
+  }
+
+  function tokenFunction(states, config) {
+    return function(stream, state) {
+      if (state.pending) {
+        var pend = state.pending.shift();
+        if (state.pending.length == 0) state.pending = null;
+        stream.pos += pend.text.length;
+        return pend.token;
+      }
+
+      if (state.local) {
+        if (state.local.end && stream.match(state.local.end)) {
+          var tok = state.local.endToken || null;
+          state.local = state.localState = null;
+          return tok;
+        } else {
+          var tok = state.local.mode.token(stream, state.localState), m;
+          if (state.local.endScan && (m = state.local.endScan.exec(stream.current())))
+            stream.pos = stream.start + m.index;
+          return tok;
+        }
+      }
+
+      var curState = states[state.state];
+      for (var i = 0; i < curState.length; i++) {
+        var rule = curState[i];
+        var matches = (!rule.data.sol || stream.sol()) && stream.match(rule.regex);
+        if (matches) {
+          if (rule.data.next) {
+            state.state = rule.data.next;
+          } else if (rule.data.push) {
+            (state.stack || (state.stack = [])).push(state.state);
+            state.state = rule.data.push;
+          } else if (rule.data.pop && state.stack && state.stack.length) {
+            state.state = state.stack.pop();
+          }
+
+          if (rule.data.mode)
+            enterLocalMode(config, state, rule.data.mode, rule.token);
+          if (rule.data.indent)
+            state.indent.push(stream.indentation() + config.indentUnit);
+          if (rule.data.dedent)
+            state.indent.pop();
+          var token = rule.token
+          if (token && token.apply) token = token(matches)
+          if (matches.length > 2 && rule.token && typeof rule.token != "string") {
+            state.pending = [];
+            for (var j = 2; j < matches.length; j++)
+              if (matches[j])
+                state.pending.push({text: matches[j], token: rule.token[j - 1]});
+            stream.backUp(matches[0].length - (matches[1] ? matches[1].length : 0));
+            return token[0];
+          } else if (token && token.join) {
+            return token[0];
+          } else {
+            return token;
+          }
+        }
+      }
+      stream.next();
+      return null;
+    };
+  }
+
+  function cmp(a, b) {
+    if (a === b) return true;
+    if (!a || typeof a != "object" || !b || typeof b != "object") return false;
+    var props = 0;
+    for (var prop in a) if (a.hasOwnProperty(prop)) {
+      if (!b.hasOwnProperty(prop) || !cmp(a[prop], b[prop])) return false;
+      props++;
+    }
+    for (var prop in b) if (b.hasOwnProperty(prop)) props--;
+    return props == 0;
+  }
+
+  function enterLocalMode(config, state, spec, token) {
+    var pers;
+    if (spec.persistent) for (var p = state.persistentStates; p && !pers; p = p.next)
+      if (spec.spec ? cmp(spec.spec, p.spec) : spec.mode == p.mode) pers = p;
+    var mode = pers ? pers.mode : spec.mode || CodeMirror.getMode(config, spec.spec);
+    var lState = pers ? pers.state : CodeMirror.startState(mode);
+    if (spec.persistent && !pers)
+      state.persistentStates = {mode: mode, spec: spec.spec, state: lState, next: state.persistentStates};
+
+    state.localState = lState;
+    state.local = {mode: mode,
+                   end: spec.end && toRegex(spec.end),
+                   endScan: spec.end && spec.forceEnd !== false && toRegex(spec.end, false),
+                   endToken: token && token.join ? token[token.length - 1] : token};
+  }
+
+  function indexOf(val, arr) {
+    for (var i = 0; i < arr.length; i++) if (arr[i] === val) return true;
+  }
+
+  function indentFunction(states, meta) {
+    return function(state, textAfter, line) {
+      if (state.local && state.local.mode.indent)
+        return state.local.mode.indent(state.localState, textAfter, line);
+      if (state.indent == null || state.local || meta.dontIndentStates && indexOf(state.state, meta.dontIndentStates) > -1)
+        return CodeMirror.Pass;
+
+      var pos = state.indent.length - 1, rules = states[state.state];
+      scan: for (;;) {
+        for (var i = 0; i < rules.length; i++) {
+          var rule = rules[i];
+          if (rule.data.dedent && rule.data.dedentIfLineStart !== false) {
+            var m = rule.regex.exec(textAfter);
+            if (m && m[0]) {
+              pos--;
+              if (rule.next || rule.push) rules = states[rule.next || rule.push];
+              textAfter = textAfter.slice(m[0].length);
+              continue scan;
+            }
+          }
+        }
+        break;
+      }
+      return pos < 0 ? 0 : state.indent[pos];
+    };
+  }
+});
diff --git a/javascripts/lib/vue-split-pane.min.js b/javascripts/lib/vue-split-pane.min.js
new file mode 100644
index 000000000..d74d0f378
--- /dev/null
+++ b/javascripts/lib/vue-split-pane.min.js
@@ -0,0 +1 @@
+!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define("SplitPane",[],t):"object"==typeof exports?exports.SplitPane=t():e.SplitPane=t()}(this,function(){return function(e){function t(r){if(n[r])return n[r].exports;var i=n[r]={i:r,l:!1,exports:{}};return e[r].call(i.exports,i,i.exports,t),i.l=!0,i.exports}var n={};return t.m=e,t.c=n,t.i=function(e){return e},t.d=function(e,n,r){t.o(e,n)||Object.defineProperty(e,n,{configurable:!1,enumerable:!0,get:r})},t.n=function(e){var n=e&&e.__esModule?function(){return e.default}:function(){return e};return t.d(n,"a",n),n},t.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},t.p="/dist/",t(t.s=19)}([function(e,t){e.exports=function(){var e=[];return e.toString=function(){for(var e=[],t=0;t<this.length;t++){var n=this[t];n[2]?e.push("@media "+n[2]+"{"+n[1]+"}"):e.push(n[1])}return e.join("")},e.i=function(t,n){"string"==typeof t&&(t=[[null,t,""]]);for(var r={},i=0;i<this.length;i++){var s=this[i][0];"number"==typeof s&&(r[s]=!0)}for(i=0;i<t.length;i++){var o=t[i];"number"==typeof o[0]&&r[o[0]]||(n&&!o[2]?o[2]=n:n&&(o[2]="("+o[2]+") and ("+n+")"),e.push(o))}},e}},function(e,t){e.exports=function(e,t,n,r){var i,s=e=e||{},o=typeof e.default;"object"!==o&&"function"!==o||(i=e,s=e.default);var a="function"==typeof s?s.options:s;if(t&&(a.render=t.render,a.staticRenderFns=t.staticRenderFns),n&&(a._scopeId=n),r){var c=Object.create(a.computed||null);Object.keys(r).forEach(function(e){var t=r[e];c[e]=function(){return t}}),a.computed=c}return{esModule:i,exports:s,options:a}}},function(e,t,n){function r(e){for(var t=0;t<e.length;t++){var n=e[t],r=u[n.id];if(r){r.refs++;for(var i=0;i<r.parts.length;i++)r.parts[i](n.parts[i]);for(;i<n.parts.length;i++)r.parts.push(o(n.parts[i]));r.parts.length>n.parts.length&&(r.parts.length=n.parts.length)}else{for(var s=[],i=0;i<n.parts.length;i++)s.push(o(n.parts[i]));u[n.id]={id:n.id,refs:1,parts:s}}}}function i(e,t){for(var n=[],r={},i=0;i<t.length;i++){var s=t[i],o=s[0],a=s[1],c=s[2],l=s[3],u={css:a,media:c,sourceMap:l};r[o]?(u.id=e+":"+r[o].parts.length,r[o].parts.push(u)):(u.id=e+":0",n.push(r[o]={id:o,parts:[u]}))}return n}function s(){var e=document.createElement("style");return e.type="text/css",p.appendChild(e),e}function o(e){var t,n,r=document.querySelector('style[data-vue-ssr-id~="'+e.id+'"]'),i=null!=r;if(i&&h)return v;if(m){var o=d++;r=f||(f=s()),t=a.bind(null,r,o,!1),n=a.bind(null,r,o,!0)}else r=r||s(),t=c.bind(null,r),n=function(){r.parentNode.removeChild(r)};return i||t(e),function(r){if(r){if(r.css===e.css&&r.media===e.media&&r.sourceMap===e.sourceMap)return;t(e=r)}else n()}}function a(e,t,n,r){var i=n?"":r.css;if(e.styleSheet)e.styleSheet.cssText=g(t,i);else{var s=document.createTextNode(i),o=e.childNodes;o[t]&&e.removeChild(o[t]),o.length?e.insertBefore(s,o[t]):e.appendChild(s)}}function c(e,t){var n=t.css,r=t.media,i=t.sourceMap;if(r&&e.setAttribute("media",r),i&&(n+="\n/*# sourceURL="+i.sources[0]+" */",n+="\n/*# sourceMappingURL=data:application/json;base64,"+btoa(unescape(encodeURIComponent(JSON.stringify(i))))+" */"),e.styleSheet)e.styleSheet.cssText=n;else{for(;e.firstChild;)e.removeChild(e.firstChild);e.appendChild(document.createTextNode(n))}}var l="undefined"!=typeof document;if("undefined"!=typeof DEBUG&&DEBUG&&!l)throw new Error("vue-style-loader cannot be used in a non-browser environment. Use { target: 'node' } in your Webpack config to indicate a server-rendering environment.");var i=n(18),u={},p=l&&(document.head||document.getElementsByTagName("head")[0]),f=null,d=0,h=!1,v=function(){},m="undefined"!=typeof navigator&&/msie [6-9]\b/.test(navigator.userAgent.toLowerCase());e.exports=function(e,t,n){h=n;var s=i(e,t);return r(s),function(t){for(var n=[],o=0;o<s.length;o++){var a=s[o],c=u[a.id];c.refs--,n.push(c)}t?(s=i(e,t),r(s)):s=[];for(var o=0;o<n.length;o++){var c=n[o];if(0===c.refs){for(var l=0;l<c.parts.length;l++)c.parts[l]();delete u[c.id]}}}};var g=function(){var e=[];return function(t,n){return e[t]=n,e.filter(Boolean).join("\n")}}()},function(e,t,n){n(16);var r=n(1)(n(4),n(13),"data-v-566a42b8",null);e.exports=r.exports},function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{default:e}}Object.defineProperty(t,"__esModule",{value:!0});var 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\ No newline at end of file
diff --git a/javascripts/lib/vuedraggable.min.js b/javascripts/lib/vuedraggable.min.js
deleted file mode 100644
index 549a40c8a..000000000
--- a/javascripts/lib/vuedraggable.min.js
+++ /dev/null
@@ -1 +0,0 @@
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+//# sourceMappingURL=vuedraggable.umd.min.js.map
\ No newline at end of file
diff --git a/stylesheets/automator.css b/stylesheets/automator.css
new file mode 100644
index 000000000..05b919ae1
--- /dev/null
+++ b/stylesheets/automator.css
@@ -0,0 +1,171 @@
+._-automator-split-pane-fix {
+  width: 100%;
+}
+
+.c-automator-tab {
+  height: 35rem;
+  width: 94rem;
+}
+
+.c-automator-tab--full-screen {
+  height: auto;
+  width: auto;
+}
+
+.l-automator-tab {
+  position: relative;
+  align-self: center;
+  margin-top: .5rem;
+}
+
+.l-automator-tab--full-screen {
+  position: fixed;
+  left: 0;
+  right: 0;
+  top: 0;
+  bottom: 0;
+  margin-top: 0;
+}
+
+.l-automator-pane {
+  display: flex;
+  flex-direction: column;
+  height: 100%
+}
+
+.l-automator-pane__content {
+  flex: 1 1 auto;
+}
+
+.l-automator-pane__controls {
+  flex: 0 0 auto;
+}
+
+.c-automator__controls {
+  background-color: #262626;
+}
+
+.l-automator__controls {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  justify-content: flex-start;
+  /* for corner buttons */
+  position: relative;
+}
+
+.l-automator__button {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0.3rem 0.8rem 0.3rem 0.8rem;
+}
+
+.l-automator__button--corner {
+  position: absolute;
+  right: 0;
+  top: 0
+}
+
+.c-automator__button {
+  margin: 0.4rem;
+  border-radius: 0.3rem;
+}
+
+.c-automator__button-play--active {
+  border-color: #45a047;
+  color: #45a047;
+}
+
+.c-automator__button--active {
+  border-color: #45a047;
+  color: #45a047;
+}
+
+.l-automator__script-names {
+  width: 15rem;
+  display: flex;
+  flex-direction: row;
+  justify-content: space-evenly;
+  align-items: center;
+}
+
+.l-automator__scripts-dropdown {
+  width: 90%;
+  height: 90%;
+  padding: 0.1rem;
+}
+
+.l-automator__rename-input {
+  width: 90%;
+  height: 90%;
+  padding: 0.1rem;
+}
+
+.c-automator-editor__active-line {
+  background: rgb(25, 10, 44);
+}
+
+.c-automator-editor__active-line-gutter {
+  font-weight: bold;
+  background: rgb(25, 10, 44);
+  filter: brightness(200%);
+}
+
+.c-automator-editor {
+  font-family: Typewriter, serif;
+  font-size: 1.4rem;
+  text-align: left;
+  border-bottom: 0.15rem solid #262626;
+}
+
+.l-automator-editor {
+  display: flex;
+  flex-direction: column;
+  flex: 1 1 auto;
+}
+
+.l-automator-editor__codemirror-container {
+  display: flex;
+  flex-direction: column;
+  flex: 1 1 auto;
+}
+
+.CodeMirror-hint {
+  font-size: 1rem;
+  font-family: Typewriter, serif;
+}
+
+.cm-s-liquibyte.CodeMirror {
+  font-size: 1.4rem;
+  font-family: Typewriter, serif;
+  line-height: 1.6rem;
+  /* required for expanding into pane */
+  flex: 1 1 auto;
+}
+
+.c-automator-docs {
+  border-right: 0.15rem solid #262626;
+  border-bottom: 0.15rem solid #262626;
+  background-color: lightgray;
+  padding-left: 1rem;
+  font-size: 1.4rem;
+  color: black;
+  text-align: left;
+  overflow: auto;
+}
+
+.c-automator-docs-page {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+}
+
+.c-automator-docs-page__link {
+  text-decoration: underline;
+  cursor: pointer;
+}
+
+.c-automator-docs-page__indented {
+  margin-left: 4rem;
+}
diff --git a/stylesheets/codemirror/codemirror.css b/stylesheets/codemirror/codemirror.css
new file mode 100644
index 000000000..c7a8ae704
--- /dev/null
+++ b/stylesheets/codemirror/codemirror.css
@@ -0,0 +1,346 @@
+/* BASICS */
+
+.CodeMirror {
+  /* Set height, width, borders, and global font properties here */
+  font-family: monospace;
+  height: 300px;
+  color: black;
+  direction: ltr;
+}
+
+/* PADDING */
+
+.CodeMirror-lines {
+  padding: 4px 0; /* Vertical padding around content */
+}
+.CodeMirror pre {
+  padding: 0 4px; /* Horizontal padding of content */
+}
+
+.CodeMirror-scrollbar-filler, .CodeMirror-gutter-filler {
+  background-color: white; /* The little square between H and V scrollbars */
+}
+
+/* GUTTER */
+
+.CodeMirror-gutters {
+  border-right: 1px solid #ddd;
+  background-color: #f7f7f7;
+  white-space: nowrap;
+}
+.CodeMirror-linenumbers {}
+.CodeMirror-linenumber {
+  padding: 0 3px 0 5px;
+  min-width: 20px;
+  text-align: right;
+  color: #999;
+  white-space: nowrap;
+}
+
+.CodeMirror-guttermarker { color: black; }
+.CodeMirror-guttermarker-subtle { color: #999; }
+
+/* CURSOR */
+
+.CodeMirror-cursor {
+  border-left: 1px solid black;
+  border-right: none;
+  width: 0;
+}
+/* Shown when moving in bi-directional text */
+.CodeMirror div.CodeMirror-secondarycursor {
+  border-left: 1px solid silver;
+}
+.cm-fat-cursor .CodeMirror-cursor {
+  width: auto;
+  border: 0 !important;
+  background: #7e7;
+}
+.cm-fat-cursor div.CodeMirror-cursors {
+  z-index: 1;
+}
+.cm-fat-cursor-mark {
+  background-color: rgba(20, 255, 20, 0.5);
+  -webkit-animation: blink 1.06s steps(1) infinite;
+  -moz-animation: blink 1.06s steps(1) infinite;
+  animation: blink 1.06s steps(1) infinite;
+}
+.cm-animate-fat-cursor {
+  width: auto;
+  border: 0;
+  -webkit-animation: blink 1.06s steps(1) infinite;
+  -moz-animation: blink 1.06s steps(1) infinite;
+  animation: blink 1.06s steps(1) infinite;
+  background-color: #7e7;
+}
+@-moz-keyframes blink {
+  0% {}
+  50% { background-color: transparent; }
+  100% {}
+}
+@-webkit-keyframes blink {
+  0% {}
+  50% { background-color: transparent; }
+  100% {}
+}
+@keyframes blink {
+  0% {}
+  50% { background-color: transparent; }
+  100% {}
+}
+
+/* Can style cursor different in overwrite (non-insert) mode */
+.CodeMirror-overwrite .CodeMirror-cursor {}
+
+.cm-tab { display: inline-block; text-decoration: inherit; }
+
+.CodeMirror-rulers {
+  position: absolute;
+  left: 0; right: 0; top: -50px; bottom: -20px;
+  overflow: hidden;
+}
+.CodeMirror-ruler {
+  border-left: 1px solid #ccc;
+  top: 0; bottom: 0;
+  position: absolute;
+}
+
+/* DEFAULT THEME */
+
+.cm-s-default .cm-header {color: blue;}
+.cm-s-default .cm-quote {color: #090;}
+.cm-negative {color: #d44;}
+.cm-positive {color: #292;}
+.cm-header, .cm-strong {font-weight: bold;}
+.cm-em {font-style: italic;}
+.cm-link {text-decoration: underline;}
+.cm-strikethrough {text-decoration: line-through;}
+
+.cm-s-default .cm-keyword {color: #708;}
+.cm-s-default .cm-atom {color: #219;}
+.cm-s-default .cm-number {color: #164;}
+.cm-s-default .cm-def {color: #00f;}
+.cm-s-default .cm-variable,
+.cm-s-default .cm-punctuation,
+.cm-s-default .cm-property,
+.cm-s-default .cm-operator {}
+.cm-s-default .cm-variable-2 {color: #05a;}
+.cm-s-default .cm-variable-3, .cm-s-default .cm-type {color: #085;}
+.cm-s-default .cm-comment {color: #a50;}
+.cm-s-default .cm-string {color: #a11;}
+.cm-s-default .cm-string-2 {color: #f50;}
+.cm-s-default .cm-meta {color: #555;}
+.cm-s-default .cm-qualifier {color: #555;}
+.cm-s-default .cm-builtin {color: #30a;}
+.cm-s-default .cm-bracket {color: #997;}
+.cm-s-default .cm-tag {color: #170;}
+.cm-s-default .cm-attribute {color: #00c;}
+.cm-s-default .cm-hr {color: #999;}
+.cm-s-default .cm-link {color: #00c;}
+
+.cm-s-default .cm-error {color: #f00;}
+.cm-invalidchar {color: #f00;}
+
+.CodeMirror-composing { border-bottom: 2px solid; }
+
+/* Default styles for common addons */
+
+div.CodeMirror span.CodeMirror-matchingbracket {color: #0b0;}
+div.CodeMirror span.CodeMirror-nonmatchingbracket {color: #a22;}
+.CodeMirror-matchingtag { background: rgba(255, 150, 0, .3); }
+.CodeMirror-activeline-background {background: #e8f2ff;}
+
+/* STOP */
+
+/* The rest of this file contains styles related to the mechanics of
+   the editor. You probably shouldn't touch them. */
+
+.CodeMirror {
+  position: relative;
+  overflow: hidden;
+  background: white;
+}
+
+.CodeMirror-scroll {
+  overflow: scroll !important; /* Things will break if this is overridden */
+  /* 30px is the magic margin used to hide the element's real scrollbars */
+  /* See overflow: hidden in .CodeMirror */
+  margin-bottom: -30px; margin-right: -30px;
+  padding-bottom: 30px;
+  height: 100%;
+  outline: none; /* Prevent dragging from highlighting the element */
+  position: relative;
+}
+.CodeMirror-sizer {
+  position: relative;
+  border-right: 30px solid transparent;
+}
+
+/* The fake, visible scrollbars. Used to force redraw during scrolling
+   before actual scrolling happens, thus preventing shaking and
+   flickering artifacts. */
+.CodeMirror-vscrollbar, .CodeMirror-hscrollbar, .CodeMirror-scrollbar-filler, .CodeMirror-gutter-filler {
+  position: absolute;
+  z-index: 6;
+  display: none;
+}
+.CodeMirror-vscrollbar {
+  right: 0; top: 0;
+  overflow-x: hidden;
+  overflow-y: scroll;
+}
+.CodeMirror-hscrollbar {
+  bottom: 0; left: 0;
+  overflow-y: hidden;
+  overflow-x: scroll;
+}
+.CodeMirror-scrollbar-filler {
+  right: 0; bottom: 0;
+}
+.CodeMirror-gutter-filler {
+  left: 0; bottom: 0;
+}
+
+.CodeMirror-gutters {
+  position: absolute; left: 0; top: 0;
+  min-height: 100%;
+  z-index: 3;
+}
+.CodeMirror-gutter {
+  white-space: normal;
+  height: 100%;
+  display: inline-block;
+  vertical-align: top;
+  margin-bottom: -30px;
+}
+.CodeMirror-gutter-wrapper {
+  position: absolute;
+  z-index: 4;
+  background: none !important;
+  border: none !important;
+}
+.CodeMirror-gutter-background {
+  position: absolute;
+  top: 0; bottom: 0;
+  z-index: 4;
+}
+.CodeMirror-gutter-elt {
+  position: absolute;
+  cursor: default;
+  z-index: 4;
+}
+.CodeMirror-gutter-wrapper ::selection { background-color: transparent }
+.CodeMirror-gutter-wrapper ::-moz-selection { background-color: transparent }
+
+.CodeMirror-lines {
+  cursor: text;
+  min-height: 1px; /* prevents collapsing before first draw */
+}
+.CodeMirror pre {
+  /* Reset some styles that the rest of the page might have set */
+  -moz-border-radius: 0; -webkit-border-radius: 0; border-radius: 0;
+  border-width: 0;
+  background: transparent;
+  font-family: inherit;
+  font-size: inherit;
+  margin: 0;
+  white-space: pre;
+  word-wrap: normal;
+  line-height: inherit;
+  color: inherit;
+  z-index: 2;
+  position: relative;
+  overflow: visible;
+  -webkit-tap-highlight-color: transparent;
+  -webkit-font-variant-ligatures: contextual;
+  font-variant-ligatures: contextual;
+}
+.CodeMirror-wrap pre {
+  word-wrap: break-word;
+  white-space: pre-wrap;
+  word-break: normal;
+}
+
+.CodeMirror-linebackground {
+  position: absolute;
+  left: 0; right: 0; top: 0; bottom: 0;
+  z-index: 0;
+}
+
+.CodeMirror-linewidget {
+  position: relative;
+  z-index: 2;
+  padding: 0.1px; /* Force widget margins to stay inside of the container */
+}
+
+.CodeMirror-widget {}
+
+.CodeMirror-rtl pre { direction: rtl; }
+
+.CodeMirror-code {
+  outline: none;
+}
+
+/* Force content-box sizing for the elements where we expect it */
+.CodeMirror-scroll,
+.CodeMirror-sizer,
+.CodeMirror-gutter,
+.CodeMirror-gutters,
+.CodeMirror-linenumber {
+  -moz-box-sizing: content-box;
+  box-sizing: content-box;
+}
+
+.CodeMirror-measure {
+  position: absolute;
+  width: 100%;
+  height: 0;
+  overflow: hidden;
+  visibility: hidden;
+}
+
+.CodeMirror-cursor {
+  position: absolute;
+  pointer-events: none;
+}
+.CodeMirror-measure pre { position: static; }
+
+div.CodeMirror-cursors {
+  visibility: hidden;
+  position: relative;
+  z-index: 3;
+}
+div.CodeMirror-dragcursors {
+  visibility: visible;
+}
+
+.CodeMirror-focused div.CodeMirror-cursors {
+  visibility: visible;
+}
+
+.CodeMirror-selected { background: #d9d9d9; }
+.CodeMirror-focused .CodeMirror-selected { background: #d7d4f0; }
+.CodeMirror-crosshair { cursor: crosshair; }
+.CodeMirror-line::selection, .CodeMirror-line > span::selection, .CodeMirror-line > span > span::selection { background: #d7d4f0; }
+.CodeMirror-line::-moz-selection, .CodeMirror-line > span::-moz-selection, .CodeMirror-line > span > span::-moz-selection { background: #d7d4f0; }
+
+.cm-searching {
+  background-color: #ffa;
+  background-color: rgba(255, 255, 0, .4);
+}
+
+/* Used to force a border model for a node */
+.cm-force-border { padding-right: .1px; }
+
+@media print {
+  /* Hide the cursor when printing */
+  .CodeMirror div.CodeMirror-cursors {
+    visibility: hidden;
+  }
+}
+
+/* See issue #2901 */
+.cm-tab-wrap-hack:after { content: ''; }
+
+/* Help users use markselection to safely style text background */
+span.CodeMirror-selectedtext { background: none; }
diff --git a/stylesheets/codemirror/lint.css b/stylesheets/codemirror/lint.css
new file mode 100644
index 000000000..f097cfe34
--- /dev/null
+++ b/stylesheets/codemirror/lint.css
@@ -0,0 +1,73 @@
+/* The lint marker gutter */
+.CodeMirror-lint-markers {
+  width: 16px;
+}
+
+.CodeMirror-lint-tooltip {
+  background-color: #ffd;
+  border: 1px solid black;
+  border-radius: 4px 4px 4px 4px;
+  color: black;
+  font-family: monospace;
+  font-size: 10pt;
+  overflow: hidden;
+  padding: 2px 5px;
+  position: fixed;
+  white-space: pre;
+  white-space: pre-wrap;
+  z-index: 100;
+  max-width: 600px;
+  opacity: 0;
+  transition: opacity .4s;
+  -moz-transition: opacity .4s;
+  -webkit-transition: opacity .4s;
+  -o-transition: opacity .4s;
+  -ms-transition: opacity .4s;
+}
+
+.CodeMirror-lint-mark-error, .CodeMirror-lint-mark-warning {
+  background-position: left bottom;
+  background-repeat: repeat-x;
+}
+
+.CodeMirror-lint-mark-error {
+  background-image:
+  url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAYAAAC09K7GAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9sJDw4cOCW1/KIAAAAZdEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAHElEQVQI12NggIL/DAz/GdA5/xkY/qPKMDAwAADLZwf5rvm+LQAAAABJRU5ErkJggg==")
+  ;
+}
+
+.CodeMirror-lint-mark-warning {
+  background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAYAAAC09K7GAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9sJFhQXEbhTg7YAAAAZdEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAMklEQVQI12NkgIIvJ3QXMjAwdDN+OaEbysDA4MPAwNDNwMCwiOHLCd1zX07o6kBVGQEAKBANtobskNMAAAAASUVORK5CYII=");
+}
+
+.CodeMirror-lint-marker-error, .CodeMirror-lint-marker-warning {
+  background-position: center center;
+  background-repeat: no-repeat;
+  cursor: pointer;
+  display: inline-block;
+  height: 16px;
+  width: 16px;
+  vertical-align: middle;
+  position: relative;
+}
+
+.CodeMirror-lint-message-error, .CodeMirror-lint-message-warning {
+  padding-left: 18px;
+  background-position: top left;
+  background-repeat: no-repeat;
+}
+
+.CodeMirror-lint-marker-error, .CodeMirror-lint-message-error {
+  background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAAHlBMVEW7AAC7AACxAAC7AAC7AAAAAAC4AAC5AAD///+7AAAUdclpAAAABnRSTlMXnORSiwCK0ZKSAAAATUlEQVR42mWPOQ7AQAgDuQLx/z8csYRmPRIFIwRGnosRrpamvkKi0FTIiMASR3hhKW+hAN6/tIWhu9PDWiTGNEkTtIOucA5Oyr9ckPgAWm0GPBog6v4AAAAASUVORK5CYII=");
+}
+
+.CodeMirror-lint-marker-warning, .CodeMirror-lint-message-warning {
+  background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAANlBMVEX/uwDvrwD/uwD/uwD/uwD/uwD/uwD/uwD/uwD6twD/uwAAAADurwD2tQD7uAD+ugAAAAD/uwDhmeTRAAAADHRSTlMJ8mN1EYcbmiixgACm7WbuAAAAVklEQVR42n3PUQqAIBBFUU1LLc3u/jdbOJoW1P08DA9Gba8+YWJ6gNJoNYIBzAA2chBth5kLmG9YUoG0NHAUwFXwO9LuBQL1giCQb8gC9Oro2vp5rncCIY8L8uEx5ZkAAAAASUVORK5CYII=");
+}
+
+.CodeMirror-lint-marker-multiple {
+  background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAcAAAAHCAMAAADzjKfhAAAACVBMVEUAAAAAAAC/v7914kyHAAAAAXRSTlMAQObYZgAAACNJREFUeNo1ioEJAAAIwmz/H90iFFSGJgFMe3gaLZ0od+9/AQZ0ADosbYraAAAAAElFTkSuQmCC");
+  background-repeat: no-repeat;
+  background-position: right bottom;
+  width: 100%; height: 100%;
+}
diff --git a/stylesheets/codemirror/liquibyte.css b/stylesheets/codemirror/liquibyte.css
new file mode 100644
index 000000000..393825e02
--- /dev/null
+++ b/stylesheets/codemirror/liquibyte.css
@@ -0,0 +1,95 @@
+.cm-s-liquibyte.CodeMirror {
+	background-color: #000;
+	color: #fff;
+	line-height: 1.2em;
+	font-size: 1em;
+}
+.cm-s-liquibyte .CodeMirror-focused .cm-matchhighlight {
+	text-decoration: underline;
+	text-decoration-color: #0f0;
+	text-decoration-style: wavy;
+}
+.cm-s-liquibyte .cm-trailingspace {
+	text-decoration: line-through;
+	text-decoration-color: #f00;
+	text-decoration-style: dotted;
+}
+.cm-s-liquibyte .cm-tab {
+	text-decoration: line-through;
+	text-decoration-color: #404040;
+	text-decoration-style: dotted;
+}
+.cm-s-liquibyte .CodeMirror-gutters { background-color: #262626; border-right: 1px solid #505050; padding-right: 0.8em; }
+.cm-s-liquibyte .CodeMirror-gutter-elt div { font-size: 1.2em; }
+.cm-s-liquibyte .CodeMirror-guttermarker {  }
+.cm-s-liquibyte .CodeMirror-guttermarker-subtle {  }
+.cm-s-liquibyte .CodeMirror-linenumber { color: #606060; padding-left: 0; }
+.cm-s-liquibyte .CodeMirror-cursor { border-left: 1px solid #eee; }
+
+.cm-s-liquibyte span.cm-comment     { color: #008000; }
+.cm-s-liquibyte span.cm-def         { color: #ffaf40; font-weight: bold; }
+.cm-s-liquibyte span.cm-keyword     { color: #c080ff; font-weight: bold; }
+.cm-s-liquibyte span.cm-builtin     { color: #ffaf40; font-weight: bold; }
+.cm-s-liquibyte span.cm-variable    { color: #5967ff; font-weight: bold; }
+.cm-s-liquibyte span.cm-string      { color: #ff8000; }
+.cm-s-liquibyte span.cm-number      { color: #0f0; font-weight: bold; }
+.cm-s-liquibyte span.cm-atom        { color: #bf3030; font-weight: bold; }
+
+.cm-s-liquibyte span.cm-variable-2  { color: #007f7f; font-weight: bold; }
+.cm-s-liquibyte span.cm-variable-3, .cm-s-liquibyte span.cm-type { color: #c080ff; font-weight: bold; }
+.cm-s-liquibyte span.cm-property    { color: #999; font-weight: bold; }
+.cm-s-liquibyte span.cm-operator    { color: #fff; }
+
+.cm-s-liquibyte span.cm-meta        { color: #0f0; }
+.cm-s-liquibyte span.cm-qualifier   { color: #fff700; font-weight: bold; }
+.cm-s-liquibyte span.cm-bracket     { color: #cc7; }
+.cm-s-liquibyte span.cm-tag         { color: #ff0; font-weight: bold; }
+.cm-s-liquibyte span.cm-attribute   { color: #c080ff; font-weight: bold; }
+.cm-s-liquibyte span.cm-error       { color: #f00; }
+
+.cm-s-liquibyte div.CodeMirror-selected { background-color: rgba(255, 0, 0, 0.25); }
+
+.cm-s-liquibyte span.cm-compilation { background-color: rgba(255, 255, 255, 0.12); }
+
+.cm-s-liquibyte .CodeMirror-activeline-background { background-color: rgba(0, 255, 0, 0.15); }
+
+/* Default styles for common addons */
+.cm-s-liquibyte .CodeMirror span.CodeMirror-matchingbracket { color: #0f0; font-weight: bold; }
+.cm-s-liquibyte .CodeMirror span.CodeMirror-nonmatchingbracket { color: #f00; font-weight: bold; }
+.CodeMirror-matchingtag { background-color: rgba(150, 255, 0, .3); }
+/* Scrollbars */
+/* Simple */
+.cm-s-liquibyte div.CodeMirror-simplescroll-horizontal div:hover, .cm-s-liquibyte div.CodeMirror-simplescroll-vertical div:hover {
+	background-color: rgba(80, 80, 80, .7);
+}
+.cm-s-liquibyte div.CodeMirror-simplescroll-horizontal div, .cm-s-liquibyte div.CodeMirror-simplescroll-vertical div {
+	background-color: rgba(80, 80, 80, .3);
+	border: 1px solid #404040;
+	border-radius: 5px;
+}
+.cm-s-liquibyte div.CodeMirror-simplescroll-vertical div {
+	border-top: 1px solid #404040;
+	border-bottom: 1px solid #404040;
+}
+.cm-s-liquibyte div.CodeMirror-simplescroll-horizontal div {
+	border-left: 1px solid #404040;
+	border-right: 1px solid #404040;
+}
+.cm-s-liquibyte div.CodeMirror-simplescroll-vertical {
+	background-color: #262626;
+}
+.cm-s-liquibyte div.CodeMirror-simplescroll-horizontal {
+	background-color: #262626;
+	border-top: 1px solid #404040;
+}
+/* Overlay */
+.cm-s-liquibyte div.CodeMirror-overlayscroll-horizontal div, div.CodeMirror-overlayscroll-vertical div {
+	background-color: #404040;
+	border-radius: 5px;
+}
+.cm-s-liquibyte div.CodeMirror-overlayscroll-vertical div {
+	border: 1px solid #404040;
+}
+.cm-s-liquibyte div.CodeMirror-overlayscroll-horizontal div {
+	border: 1px solid #404040;
+}
diff --git a/stylesheets/codemirror/panda-syntax.css b/stylesheets/codemirror/panda-syntax.css
new file mode 100644
index 000000000..de14e9112
--- /dev/null
+++ b/stylesheets/codemirror/panda-syntax.css
@@ -0,0 +1,85 @@
+/*
+	Name:       Panda Syntax
+	Author:     Siamak Mokhtari (http://github.com/siamak/)
+	CodeMirror template by Siamak Mokhtari (https://github.com/siamak/atom-panda-syntax)
+*/
+.cm-s-panda-syntax {
+	background: #292A2B;
+	color: #E6E6E6;
+	line-height: 1.5;
+	font-family: 'Operator Mono', 'Source Code Pro', Menlo, Monaco, Consolas, Courier New, monospace;
+}
+.cm-s-panda-syntax .CodeMirror-cursor { border-color: #ff2c6d; }
+.cm-s-panda-syntax .CodeMirror-activeline-background {
+	background: rgba(99, 123, 156, 0.1);
+}
+.cm-s-panda-syntax .CodeMirror-selected {
+	background: #FFF;
+}
+.cm-s-panda-syntax .cm-comment {
+	font-style: italic;
+	color: #676B79;
+}
+.cm-s-panda-syntax .cm-operator {
+	color: #f3f3f3;
+}
+.cm-s-panda-syntax .cm-string {
+	color: #19F9D8;
+}
+.cm-s-panda-syntax .cm-string-2 {
+    color: #FFB86C;
+}
+
+.cm-s-panda-syntax .cm-tag {
+	color: #ff2c6d;
+}
+.cm-s-panda-syntax .cm-meta {
+	color: #b084eb;
+}
+
+.cm-s-panda-syntax .cm-number {
+	color: #FFB86C;
+}
+.cm-s-panda-syntax .cm-atom {
+	color: #ff2c6d;
+}
+.cm-s-panda-syntax .cm-keyword {
+	color: #FF75B5;
+}
+.cm-s-panda-syntax .cm-variable {
+	color: #ffb86c;
+}
+.cm-s-panda-syntax .cm-variable-2 {
+	color: #ff9ac1;
+}
+.cm-s-panda-syntax .cm-variable-3, .cm-s-panda-syntax .cm-type {
+	color: #ff9ac1;
+}
+
+.cm-s-panda-syntax .cm-def {
+	color: #e6e6e6;
+}
+.cm-s-panda-syntax .cm-property {
+	color: #f3f3f3;
+}
+.cm-s-panda-syntax .cm-unit {
+    color: #ffb86c;
+}
+
+.cm-s-panda-syntax .cm-attribute {
+    color: #ffb86c;
+}
+
+.cm-s-panda-syntax .CodeMirror-matchingbracket {
+    border-bottom: 1px dotted #19F9D8;
+    padding-bottom: 2px;
+    color: #e6e6e6;
+}
+.cm-s-panda-syntax .CodeMirror-gutters {
+    background: #292a2b;
+    border-right-color: rgba(255, 255, 255, 0.1);
+}
+.cm-s-panda-syntax .CodeMirror-linenumber {
+    color: #e6e6e6;
+    opacity: 0.6;
+}
diff --git a/stylesheets/codemirror/show-hint.css b/stylesheets/codemirror/show-hint.css
new file mode 100644
index 000000000..5617ccca2
--- /dev/null
+++ b/stylesheets/codemirror/show-hint.css
@@ -0,0 +1,36 @@
+.CodeMirror-hints {
+  position: absolute;
+  z-index: 10;
+  overflow: hidden;
+  list-style: none;
+
+  margin: 0;
+  padding: 2px;
+
+  -webkit-box-shadow: 2px 3px 5px rgba(0,0,0,.2);
+  -moz-box-shadow: 2px 3px 5px rgba(0,0,0,.2);
+  box-shadow: 2px 3px 5px rgba(0,0,0,.2);
+  border-radius: 3px;
+  border: 1px solid silver;
+
+  background: white;
+  font-size: 90%;
+  font-family: monospace;
+
+  max-height: 20em;
+  overflow-y: auto;
+}
+
+.CodeMirror-hint {
+  margin: 0;
+  padding: 0 4px;
+  border-radius: 2px;
+  white-space: pre;
+  color: black;
+  cursor: pointer;
+}
+
+li.CodeMirror-hint-active {
+  background: #08f;
+  color: white;
+}
diff --git a/stylesheets/styles.css b/stylesheets/styles.css
index b40e19561..2d259c06c 100644
--- a/stylesheets/styles.css
+++ b/stylesheets/styles.css
@@ -487,16 +487,6 @@ button {
     color: white;
 }
 
-.automator-save-load-btn {
-  width: 3rem;
-  height: 3rem;
-  font-size: 1.2rem;
-  display: block;
-  cursor: pointer;
-  border-radius: .4rem;
-  margin-left: .5rem;
-}
-
 .celestialtabbtn {
   background-color: #5151ec;
   border: 2px solid #d0d0d0;
@@ -598,13 +588,6 @@ button {
 
 }
 
-#automatorTreeCanvas {
-    top: 0;
-    left: 0;
-    position: absolute;
-    z-index: -999;
-}
-
 #loading {
     position: absolute;
     top: 50%;
@@ -915,7 +898,6 @@ p,
 ul,
 ol,
 table,
-pre,
 dl {
     margin: 0 0 3px;
 }
@@ -973,21 +955,6 @@ blockquote {
     font-style: italic;
 }
 
-code,
-pre {
-    font-family: Monaco, Bitstream Vera Sans Mono, Lucida Console, Terminal, Consolas, Liberation Mono, DejaVu Sans Mono, Courier New, monospace;
-    color: #333;
-    font-size: 12px;
-}
-
-pre {
-    padding: 8px 15px;
-    background: #f8f8f8;
-    border-radius: 5px;
-    border: 1px solid #e5e5e5;
-    overflow-x: auto;
-}
-
 table {
     border-spacing: 0
 }
@@ -1130,113 +1097,6 @@ br {
     transform: translate(-50%,-50%);
 }
 
-#automator {
-    height: 300px;
-    width: 400px;
-    overflow-y: scroll;
-    resize: none;
-    font-family: 'PT Mono', monospace;
-    color: #66ff66;
-    background-color: black;
-    border: none;
-    padding: 10px;
-    border-radius: 10px;
-}
-
-    #automator::-webkit-scrollbar {
-        width: 10px;
-    }
-
-    #automator::-webkit-scrollbar-track {
-        box-shadow: inset 0 0 5px grey;
-        border-radius: 10px;
-    }
-
-    #automator::-webkit-scrollbar-thumb {
-        background: #08450b;
-        border-radius: 5px;
-    }
-
-#automator::selection {
-    color: red;
-}
-
-.automatorinstruction.command {
-    background-color: black;
-    border: 2px solid #0b600e;
-    border-radius: 5px;
-    color: #d5ffd7;
-    cursor: pointer;
-    transition-duration: 0.12s;
-    width: 150px;
-    height: 50px;
-}
-
-.automatorinstruction.target {
-    background-color: black;
-    border: 2px solid #2196F3;
-    border-radius: 5px;
-    color: #BBDEFB;
-    cursor: pointer;
-    transition-duration: 0.12s;
-    width: 150px;
-    height: 50px;
-}
-
-.automatorinstruction.command:hover {
-    color: black;
-    background-color: #d5ffd7;
-}
-
-.automatorinstruction.target:hover {
-    color: black;
-    background-color: #BBDEFB;
-}
-
-.automatorinstructionbought.command {
-    background-color: #0b600e;
-    border: 2px solid #08450b;
-    border-radius: 5px;
-    color: #d5ffd7;
-    cursor: default;
-    transition-duration: 0.12s;
-    width: 150px;
-    height: 50px;
-}
-
-.automatorinstructionbought.target {
-    background-color: #2196F3;
-    border: 2px solid #1976D2;
-    border-radius: 5px;
-    color: #BBDEFB;
-    cursor: default;
-    transition-duration: 0.12s;
-    width: 150px;
-    height: 50px;
-}
-
-.automatorinstructionlocked.command {
-    background-color: #656565;
-    border: 2px solid #0b600e;
-    border-radius: 5px;
-    color: #d5ffd7;
-    cursor: default;
-    transition-duration: 0.12s;
-    width: 150px;
-    height: 50px;
-}
-
-.automatorinstructionlocked.target {
-    background-color: #656565;
-    border: 2px solid #2196F3;
-    border-radius: 5px;
-    color: #BBDEFB;
-    cursor: default;
-    transition-duration: 0.12s;
-    width: 150px;
-    height: 50px;
-}
-
 #perks {
     width: 900px;
     height: 500px;
@@ -1294,10 +1154,6 @@ screen and (max-width: 720px) {
     header p.view {
         position: static;
     }
-    pre,
-    code {
-        word-wrap: normal;
-    }
 }
 
 @media print,
@@ -6312,3 +6168,78 @@ kbd {
   color: black;
   font-size: 1.5rem;
 }
+
+
+.c-automator-blocks {
+  width: 100%;
+}
+
+.o-automator-command {
+  border: 1px solid gainsboro;
+  padding: .5rem;
+  display: inline-block;
+  background: #de8787;
+  border-radius: .5rem;
+  width: 6rem;
+  user-select: none;
+  cursor: grab;
+}
+
+.c-automator-command-list {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+
+.c-automator-block-row {
+  display: flex;
+  align-items: center;
+  margin-bottom: .5rem;
+}
+
+.c-automator-block-row > * {
+  margin-right: .5rem
+}
+
+.c-automator-block-editor {
+  overflow-y: scroll;
+  height: 100%;
+  background-color: black;
+  border-top-left-radius: 1rem;
+  border-bottom-left-radius: 1rem;
+  box-sizing: border-box;
+  padding: .5rem;
+  tab-size: 1.5em;
+  -moz-tab-size: 1.5em;
+}
+
+.o-automator-block-input {
+  border: 1px solid gainsboro;
+  padding: .5rem;
+  display: inline-block;
+  background: burlywood;
+  border-radius: .5rem;
+  color: #4F5957;
+  font-size: 1.1rem;
+  font-family: Typewriter, serif;
+}
+
+.o-automator-linenumber {
+  color: #55ff55;
+  font-size: 1.4rem;
+}
+
+.l-automator-nested-block {
+  width: fit-content;
+  padding: 1rem;
+  border: 2px dotted #55ff55;
+  margin-left: 3rem;
+  margin-top: .5rem;
+  min-widtH: 30rem;
+}
+
+.o-automator-block-delete {
+  color: #ff3333;
+  font-size: 1.7rem;
+  cursor: pointer;
+}
\ No newline at end of file
diff --git a/stylesheets/theme-Dark.css b/stylesheets/theme-Dark.css
index c68b3fe28..d2befd37b 100644
--- a/stylesheets/theme-Dark.css
+++ b/stylesheets/theme-Dark.css
@@ -137,42 +137,6 @@ input.t-dark {
     color: #757575;
 }
 
-.t-dark .automatorinstruction.command {
-    background-color: black;
-}
-
-.t-dark .automatorinstruction.target {
-    background-color: black;
-}
-
-.t-dark .automatorinstruction.command:hover {
-    color: black;
-    background-color: #d5ffd7;
-}
-
-.t-dark .automatorinstruction.target:hover {
-    color: black;
-    background-color: #BBDEFB;
-}
-
-.t-dark .automatorinstructionbought.command {
-    background-color: #0b600e;
-    border: 2px solid #08450b;
-}
-
-.t-dark .automatorinstructionbought.target {
-    background-color: #2196F3;
-    border: 2px solid #1976D2;
-}
-
-.t-dark .automatorinstructionlocked.command {
-    background-color: #656565;
-}
-
-.t-dark .automatorinstructionlocked.target {
-    background-color: #656565;
-}
-
 .t-dark #realityanimbg {
     filter: invert(1);
 }
\ No newline at end of file
diff --git a/stylesheets/theme-S6.css b/stylesheets/theme-S6.css
index 53ec1bce1..a021974de 100644
--- a/stylesheets/theme-S6.css
+++ b/stylesheets/theme-S6.css
@@ -169,38 +169,6 @@ strong {
   text-shadow: 0 0 7px #0b600e;
 }
 
-.t-s6 .automatorinstruction.command {
-    background-color: black;
-}
-
-.t-s6 .automatorinstruction.target {
-    background-color: black;
-}
-
-.t-s6 .automatorinstruction.command:hover {
-    background-color: #d5ffd7;
-}
-
-.t-s6 .automatorinstruction.target:hover {
-    background-color: #BBDEFB;
-}
-
-.t-s6 .automatorinstructionbought.command {
-    background-color: #0b600e;
-}
-
-.t-s6 .automatorinstructionbought.target {
-    background-color: #2196F3;
-}
-
-.t-s6 .automatorinstructionlocked.command {
-    background-color: #656565;
-}
-
-.t-s6 .automatorinstructionlocked.target {
-    background-color: #656565;
-}
-
 .t-s6 #realityanimbg {
     filter: invert(1);
 }
\ No newline at end of file