/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Ajax.org Code Editor (ACE).
 *
 * The Initial Developer of the Original Code is
 * Ajax.org B.V.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *      Fabian Jakobs <fabian AT ajax DOT org>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

define(function(require, exports, module) {

var UndoManager = function() {
    this.$undoStack = [];
    this.$redoStack = [];
};

(function() {

    /*this.$doc = null;
    this.setDocument = function(doc) {
        this.$doc = doc;
    };*/

    this.execute = function(options) {
        var deltas = options.args[0];
        this.$doc  = options.args[1];
        this.$undoStack.push(deltas);
    };

    this.undo = function() {
        var deltas = this.$undoStack.pop();
        if (deltas) {
            this.$doc.undoChanges(deltas);
            this.$redoStack.push(deltas);
        }
    };

    this.redo = function() {
        var deltas = this.$redoStack.pop();
        if (deltas) {
            this.$doc.redoChanges(deltas);
            this.$undoStack.push(deltas);
        }
    };

}).call(UndoManager.prototype);

exports.UndoManager = UndoManager;
});

@@ -1878,106 +1878,8 @@
  %7B%0A%0A
-    /*this.$doc = null;%0A    this.setDocument = function(doc) %7B%0A        this.$doc = doc;%0A    %7D;*/%0A%0A
     

remove dead code