93 lines
2.8 KiB
JavaScript
93 lines
2.8 KiB
JavaScript
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* $Id: file 64488 2006-03-10 17:32:09Z paulo $
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*/
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mindplot.DesignerUndoManager = new Class({
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initialize: function()
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{
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this._undoQueue = [];
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this._redoQueue = [];
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this._baseId = 0;
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},
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enqueue:function(command)
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{
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core.assert(command, "Command can not be null");
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var length = this._undoQueue.length;
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if (command.discartDuplicated && length > 0)
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{
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// Skip duplicated events ...
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var lastItem = this._undoQueue[length - 1];
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if (lastItem.discartDuplicated != command.discartDuplicated)
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{
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this._undoQueue.push(command);
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}
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} else
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{
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this._undoQueue.push(command);
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}
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this._redoQueue = [];
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},
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execUndo: function(commandContext)
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{
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if (this._undoQueue.length > 0)
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{
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var command = this._undoQueue.pop();
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this._redoQueue.push(command);
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command.undoExecute(commandContext);
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}
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},
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execRedo: function(commandContext)
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{
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if (this._redoQueue.length > 0)
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{
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var command = this._redoQueue.pop();
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this._undoQueue.push(command);
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command.execute(commandContext);
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}
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},
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_buildEvent: function()
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{
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return {undoSteps: this._undoQueue.length, redoSteps:this._redoQueue.length};
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},
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markAsChangeBase: function()
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{
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var undoLenght = this._undoQueue.length;
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if (undoLenght > 0)
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{
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var command = this._undoQueue[undoLenght - 1];
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this._baseId = command.getId();
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} else
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{
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this._baseId = 0;
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}
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},
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hasBeenChanged: function()
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{
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var result = true;
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var undoLenght = this._undoQueue.length;
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if (undoLenght == 0 && this._baseId == 0)
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{
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result = false;
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} else if(undoLenght>0)
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{
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var command = this._undoQueue[undoLenght - 1];
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result = (this._baseId != command.getId());
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}
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return result;
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}});
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