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95 lines
3.1 KiB
JavaScript
95 lines
3.1 KiB
JavaScript
/* vim:ts=4:sts=4:sw=4:
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (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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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Ajax.org Code Editor (ACE).
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*
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* The Initial Developer of the Original Code is
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* Ajax.org B.V.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Fabian Jakobs <fabian AT ajax DOT org>
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* Mihai Sucan <mihai DOT sucan AT gmail DOT com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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define(function(require, exports, module) {
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"use strict";
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var UndoManager = function() {
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this.reset();
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};
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(function() {
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this.execute = function(options) {
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var deltas = options.args[0];
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this.$doc = options.args[1];
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this.$undoStack.push(deltas);
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this.$redoStack = [];
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};
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this.undo = function(dontSelect) {
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var deltas = this.$undoStack.pop();
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var undoSelectionRange = null;
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if (deltas) {
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undoSelectionRange =
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this.$doc.undoChanges(deltas, dontSelect);
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this.$redoStack.push(deltas);
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}
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return undoSelectionRange;
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};
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this.redo = function(dontSelect) {
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var deltas = this.$redoStack.pop();
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var redoSelectionRange = null;
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if (deltas) {
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redoSelectionRange =
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this.$doc.redoChanges(deltas, dontSelect);
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this.$undoStack.push(deltas);
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}
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return redoSelectionRange;
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};
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this.reset = function() {
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this.$undoStack = [];
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this.$redoStack = [];
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};
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this.hasUndo = function() {
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return this.$undoStack.length > 0;
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};
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this.hasRedo = function() {
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return this.$redoStack.length > 0;
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};
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}).call(UndoManager.prototype);
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exports.UndoManager = UndoManager;
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});
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