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51 lines
1.5 KiB
Plaintext
51 lines
1.5 KiB
Plaintext
"use strict";
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/*
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Copyright [2014] [Diagramo]
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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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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/**
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* An 'interface' for undoable actions, implemented by classes that specify
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* how to handle action
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*
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* QUESTION: Should we have something like no undoable actions (ex: delete a group)
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* @this {Command}
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* @constructor
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* @author Alex <alex@scriptoid.com>
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*/
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function Command(){
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this.oType = 'Command';
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/**Any sequence of many mergeable actions that can be packed (merged into a single) by the history.
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*Example: all figure moves can be merges into a single command*/
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this.mergeable = true;
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/**Keeps track if we are executing this command for the first time.
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*Usually it there can be differences between first execute and a later execeut (redo)*/
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this.firstExecute = true;
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/*........*/
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}
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Command.prototype = {
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/**This method got called every time the Command must execute*/
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execute : function(){
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},
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/**This method should be called every time the Command should be undone*/
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undo : function(){
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}
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} |