mirror of
https://github.com/silverstripe/silverstripe-framework
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git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@92488 467b73ca-7a2a-4603-9d3b-597d59a354a9
184 lines
4.2 KiB
JavaScript
184 lines
4.2 KiB
JavaScript
/**
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* $Id: UndoManager.js 1045 2009-03-04 20:03:18Z spocke $
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*
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* @author Moxiecode
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* @copyright Copyright © 2004-2008, Moxiecode Systems AB, All rights reserved.
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*/
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(function(tinymce) {
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/**#@+
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* @class This class handles the undo/redo history levels for the editor. Since the build in undo/redo has major drawbacks a custom one was needed.
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* @member tinymce.UndoManager
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*/
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tinymce.create('tinymce.UndoManager', {
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index : 0,
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data : null,
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typing : 0,
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/**
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* Constructs a new UndoManager instance.
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*
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* @constructor
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* @param {tinymce.Editor} ed Editor instance to undo/redo in.
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*/
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UndoManager : function(ed) {
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var t = this, Dispatcher = tinymce.util.Dispatcher;
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t.editor = ed;
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t.data = [];
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t.onAdd = new Dispatcher(this);
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t.onUndo = new Dispatcher(this);
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t.onRedo = new Dispatcher(this);
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},
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/**#@+
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* @method
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*/
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/**
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* Adds a new undo level/snapshot to the undo list.
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*
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* @param {Object} l Optional undo level object to add.
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* @return {Object} Undo level that got added or null it a level wasn't needed.
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*/
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add : function(l) {
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var t = this, i, ed = t.editor, b, s = ed.settings, la;
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l = l || {};
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l.content = l.content || ed.getContent({format : 'raw', no_events : 1});
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// Add undo level if needed
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l.content = l.content.replace(/^\s*|\s*$/g, '');
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la = t.data[t.index > 0 && (t.index == 0 || t.index == t.data.length) ? t.index - 1 : t.index];
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if (!l.initial && la && l.content == la.content)
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return null;
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// Time to compress
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if (s.custom_undo_redo_levels) {
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if (t.data.length > s.custom_undo_redo_levels) {
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for (i = 0; i < t.data.length - 1; i++)
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t.data[i] = t.data[i + 1];
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t.data.length--;
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t.index = t.data.length;
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}
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}
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if (s.custom_undo_redo_restore_selection && !l.initial)
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l.bookmark = b = l.bookmark || ed.selection.getBookmark();
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if (t.index < t.data.length)
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t.index++;
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// Only initial marked undo levels should be allowed as first item
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// This to workaround a bug with Firefox and the blur event
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if (t.data.length === 0 && !l.initial)
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return null;
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// Add level
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t.data.length = t.index + 1;
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t.data[t.index++] = l;
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if (l.initial)
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t.index = 0;
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// Set initial bookmark use first real undo level
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if (t.data.length == 2 && t.data[0].initial)
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t.data[0].bookmark = b;
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t.onAdd.dispatch(t, l);
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ed.isNotDirty = 0;
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//console.dir(t.data);
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return l;
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},
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/**
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* Undoes the last action.
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*
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* @return {Object} Undo level or null if no undo was performed.
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*/
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undo : function() {
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var t = this, ed = t.editor, l = l, i;
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if (t.typing) {
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t.add();
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t.typing = 0;
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}
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if (t.index > 0) {
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// If undo on last index then take snapshot
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if (t.index == t.data.length && t.index > 1) {
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i = t.index;
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t.typing = 0;
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if (!t.add())
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t.index = i;
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--t.index;
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}
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l = t.data[--t.index];
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ed.setContent(l.content, {format : 'raw'});
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ed.selection.moveToBookmark(l.bookmark);
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t.onUndo.dispatch(t, l);
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}
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return l;
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},
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/**
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* Redoes the last action.
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*
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* @return {Object} Redo level or null if no redo was performed.
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*/
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redo : function() {
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var t = this, ed = t.editor, l = null;
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if (t.index < t.data.length - 1) {
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l = t.data[++t.index];
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ed.setContent(l.content, {format : 'raw'});
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ed.selection.moveToBookmark(l.bookmark);
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t.onRedo.dispatch(t, l);
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}
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return l;
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},
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/**
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* Removes all undo levels.
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*/
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clear : function() {
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var t = this;
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t.data = [];
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t.index = 0;
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t.typing = 0;
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t.add({initial : true});
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},
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/**
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* Returns true/false if the undo manager has any undo levels.
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*
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* @return {bool} true/false if the undo manager has any undo levels.
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*/
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hasUndo : function() {
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return this.index != 0 || this.typing;
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},
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/**
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* Returns true/false if the undo manager has any redo levels.
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*
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* @return {bool} true/false if the undo manager has any redo levels.
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*/
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hasRedo : function() {
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return this.index < this.data.length - 1;
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}
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/**#@-*/
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});
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})(tinymce);
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