mirror of
https://github.com/godotengine/godot.git
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336 lines
8.6 KiB
C++
336 lines
8.6 KiB
C++
/*************************************************************************/
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/* undo_redo.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "undo_redo.h"
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void UndoRedo::_discard_redo() {
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if (current_action==actions.size()-1)
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return;
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for(int i=current_action+1;i<actions.size();i++) {
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for (List<Operation>::Element *E=actions[i].do_ops.front();E;E=E->next()) {
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if (E->get().type==Operation::TYPE_REFERENCE) {
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Object *obj = ObjectDB::get_instance(E->get().object);
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if (obj)
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memdelete(obj);
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}
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}
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//ERASE do data
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}
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actions.resize(current_action+1);
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}
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void UndoRedo::create_action(const String& p_name,bool p_mergeable) {
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if (action_level==0) {
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_discard_redo();
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if (p_mergeable && actions.size() && actions[actions.size()-1].name==p_name) {
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//old will replace new (it's mergeable after all)
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// should check references though!
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current_action=actions.size()-2;
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actions[current_action+1].do_ops.clear();
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//actions[current_action+1].undo_ops.clear(); - no, this is kept
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merging=true;
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} else {
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Action new_action;
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new_action.name=p_name;
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actions.push_back(new_action);
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merging=false;
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}
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}
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action_level++;
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}
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void UndoRedo::add_do_method(Object *p_object,const String& p_method,VARIANT_ARG_DECLARE) {
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VARIANT_ARGPTRS
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ERR_FAIL_COND(action_level<=0);
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ERR_FAIL_COND((current_action+1)>=actions.size());
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Operation do_op;
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do_op.object=p_object->get_instance_ID();
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if (p_object->cast_to<Resource>())
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do_op.resref=Ref<Resource>(p_object->cast_to<Resource>());
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do_op.type=Operation::TYPE_METHOD;
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do_op.name=p_method;
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for(int i=0;i<VARIANT_ARG_MAX;i++) {
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do_op.args[i]=*argptr[i];
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}
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actions[current_action+1].do_ops.push_back(do_op);
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}
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void UndoRedo::add_undo_method(Object *p_object,const String& p_method,VARIANT_ARG_DECLARE) {
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VARIANT_ARGPTRS
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ERR_FAIL_COND(action_level<=0);
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ERR_FAIL_COND((current_action+1)>=actions.size());
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if (merging)
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return; //- no undo if merging
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Operation undo_op;
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undo_op.object=p_object->get_instance_ID();
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if (p_object->cast_to<Resource>())
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undo_op.resref=Ref<Resource>(p_object->cast_to<Resource>());
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undo_op.type=Operation::TYPE_METHOD;
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undo_op.name=p_method;
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for(int i=0;i<VARIANT_ARG_MAX;i++) {
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undo_op.args[i]=*argptr[i];
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}
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actions[current_action+1].undo_ops.push_back(undo_op);
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}
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void UndoRedo::add_do_property(Object *p_object,const String& p_property,const Variant& p_value) {
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ERR_FAIL_COND(action_level<=0);
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ERR_FAIL_COND((current_action+1)>=actions.size());
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Operation do_op;
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do_op.object=p_object->get_instance_ID();
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if (p_object->cast_to<Resource>())
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do_op.resref=Ref<Resource>(p_object->cast_to<Resource>());
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do_op.type=Operation::TYPE_PROPERTY;
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do_op.name=p_property;
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do_op.args[0]=p_value;
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actions[current_action+1].do_ops.push_back(do_op);
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}
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void UndoRedo::add_undo_property(Object *p_object,const String& p_property,const Variant& p_value) {
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ERR_FAIL_COND(action_level<=0);
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ERR_FAIL_COND((current_action+1)>=actions.size());
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Operation undo_op;
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undo_op.object=p_object->get_instance_ID();
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if (p_object->cast_to<Resource>())
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undo_op.resref=Ref<Resource>(p_object->cast_to<Resource>());
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undo_op.type=Operation::TYPE_PROPERTY;
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undo_op.name=p_property;
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undo_op.args[0]=p_value;
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actions[current_action+1].undo_ops.push_back(undo_op);
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}
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void UndoRedo::add_do_reference(Object *p_object) {
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ERR_FAIL_COND(action_level<=0);
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ERR_FAIL_COND((current_action+1)>=actions.size());
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Operation do_op;
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do_op.object=p_object->get_instance_ID();
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if (p_object->cast_to<Resource>())
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do_op.resref=Ref<Resource>(p_object->cast_to<Resource>());
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do_op.type=Operation::TYPE_REFERENCE;
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actions[current_action+1].do_ops.push_back(do_op);
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}
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void UndoRedo::add_undo_reference(Object *p_object) {
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ERR_FAIL_COND(action_level<=0);
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ERR_FAIL_COND((current_action+1)>=actions.size());
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Operation undo_op;
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undo_op.object=p_object->get_instance_ID();
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if (p_object->cast_to<Resource>())
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undo_op.resref=Ref<Resource>(p_object->cast_to<Resource>());
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undo_op.type=Operation::TYPE_REFERENCE;
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actions[current_action+1].undo_ops.push_back(undo_op);
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}
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void UndoRedo::_pop_history_tail() {
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_discard_redo();
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if (!actions.size())
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return;
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for (List<Operation>::Element *E=actions[0].undo_ops.front();E;E=E->next()) {
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if (E->get().type==Operation::TYPE_REFERENCE) {
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Object *obj = ObjectDB::get_instance(E->get().object);
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if (obj)
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memdelete(obj);
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}
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}
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actions.remove(0);
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current_action--;
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}
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void UndoRedo::commit_action() {
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ERR_FAIL_COND(action_level<=0);
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action_level--;
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if (action_level>0)
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return; //still nested
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redo(); // perform action
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if (max_steps>0 && actions.size()>max_steps) {
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//clear early steps
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while(actions.size() > max_steps)
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_pop_history_tail();
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}
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if (callback && actions.size()>0) {
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callback(callback_ud,actions[actions.size()-1].name);
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}
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}
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void UndoRedo::_process_operation_list(List<Operation>::Element *E) {
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for (;E;E=E->next()) {
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Operation &op=E->get();
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Object *obj = ObjectDB::get_instance(op.object);
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if (!obj) {
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//corruption
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clear_history();
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ERR_FAIL_COND(!obj);
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}
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switch(op.type) {
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case Operation::TYPE_METHOD: {
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obj->call(op.name,VARIANT_ARGS_FROM_ARRAY(op.args));
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} break;
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case Operation::TYPE_PROPERTY: {
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obj->set(op.name,op.args[0]);
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#ifdef TOOLS_ENABLED
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Resource* res = obj->cast_to<Resource>();
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if (res)
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res->set_edited(true);
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#endif
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} break;
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case Operation::TYPE_REFERENCE: {
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//do nothing
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} break;
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}
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}
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}
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void UndoRedo::redo() {
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ERR_FAIL_COND(action_level>0);
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if ((current_action+1)>=actions.size())
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return; //nothing to redo
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current_action++;
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_process_operation_list(actions[current_action].do_ops.front());
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version++;
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}
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void UndoRedo::undo() {
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ERR_FAIL_COND(action_level>0);
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if (current_action<0)
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return; //nothing to redo
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_process_operation_list(actions[current_action].undo_ops.front());
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current_action--;
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}
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void UndoRedo::clear_history() {
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ERR_FAIL_COND(action_level>0);
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_discard_redo();
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while(actions.size())
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_pop_history_tail();
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version++;
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}
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String UndoRedo::get_current_action_name() const {
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ERR_FAIL_COND_V(action_level>0,"");
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if (current_action<0)
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return ""; //nothing to redo
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return actions[current_action].name;
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}
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void UndoRedo::set_max_steps(int p_max_steps) {
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max_steps=p_max_steps;
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}
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int UndoRedo::get_max_steps() const {
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return max_steps;
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}
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uint64_t UndoRedo::get_version() const {
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return version;
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}
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void UndoRedo::set_commit_notify_callback(CommitNotifyCallback p_callback,void* p_ud) {
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callback=p_callback;
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callback_ud=p_ud;
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}
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UndoRedo::UndoRedo() {
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version=0;
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action_level=0;
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current_action=-1;
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max_steps=-1;
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merging=true;
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callback=NULL;
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callback_ud=NULL;
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}
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UndoRedo::~UndoRedo() {
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clear_history();
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}
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