fckundo.js
223 lines
| 5.8 KiB
| application/javascript
|
JavascriptLexer
arturo
|
r0 | /* | ||
| * FCKeditor - The text editor for Internet - http://www.fckeditor.net | ||||
| * Copyright (C) 2003-2008 Frederico Caldeira Knabben | ||||
| * | ||||
| * == BEGIN LICENSE == | ||||
| * | ||||
| * Licensed under the terms of any of the following licenses at your | ||||
| * choice: | ||||
| * | ||||
| * - GNU General Public License Version 2 or later (the "GPL") | ||||
| * http://www.gnu.org/licenses/gpl.html | ||||
| * | ||||
| * - GNU Lesser General Public License Version 2.1 or later (the "LGPL") | ||||
| * http://www.gnu.org/licenses/lgpl.html | ||||
| * | ||||
| * - Mozilla Public License Version 1.1 or later (the "MPL") | ||||
| * http://www.mozilla.org/MPL/MPL-1.1.html | ||||
| * | ||||
| * == END LICENSE == | ||||
| */ | ||||
| var FCKUndo = new Object() ; | ||||
| FCKUndo.SavedData = new Array() ; | ||||
| FCKUndo.CurrentIndex = -1 ; | ||||
| FCKUndo.TypesCount = 0 ; | ||||
| FCKUndo.Changed = false ; // Is the document changed in respect to its initial image? | ||||
| FCKUndo.MaxTypes = 25 ; | ||||
| FCKUndo.Typing = false ; | ||||
| FCKUndo.SaveLocked = false ; | ||||
| FCKUndo._GetBookmark = function() | ||||
| { | ||||
| FCKSelection.Restore() ; | ||||
| var range = new FCKDomRange( FCK.EditorWindow ) ; | ||||
| try | ||||
| { | ||||
| // There are some tricky cases where this might fail (e.g. having a lone empty table in IE) | ||||
| range.MoveToSelection() ; | ||||
| } | ||||
| catch ( e ) | ||||
| { | ||||
| return null ; | ||||
| } | ||||
| if ( FCKBrowserInfo.IsIE ) | ||||
| { | ||||
| var bookmark = range.CreateBookmark() ; | ||||
| var dirtyHtml = FCK.EditorDocument.body.innerHTML ; | ||||
| range.MoveToBookmark( bookmark ) ; | ||||
| return [ bookmark, dirtyHtml ] ; | ||||
| } | ||||
| return range.CreateBookmark2() ; | ||||
| } | ||||
| FCKUndo._SelectBookmark = function( bookmark ) | ||||
| { | ||||
| if ( ! bookmark ) | ||||
| return ; | ||||
| var range = new FCKDomRange( FCK.EditorWindow ) ; | ||||
| if ( bookmark instanceof Object ) | ||||
| { | ||||
| if ( FCKBrowserInfo.IsIE ) | ||||
| range.MoveToBookmark( bookmark[0] ) ; | ||||
| else | ||||
| range.MoveToBookmark2( bookmark ) ; | ||||
| try | ||||
| { | ||||
| // this does not always succeed, there are still some tricky cases where it fails | ||||
| // e.g. add a special character at end of document, undo, redo -> error | ||||
| range.Select() ; | ||||
| } | ||||
| catch ( e ) | ||||
| { | ||||
| // if select restore fails, put the caret at the end of the document | ||||
| range.MoveToPosition( FCK.EditorDocument.body, 4 ) ; | ||||
| range.Select() ; | ||||
| } | ||||
| } | ||||
| } | ||||
| FCKUndo._CompareCursors = function( cursor1, cursor2 ) | ||||
| { | ||||
| for ( var i = 0 ; i < Math.min( cursor1.length, cursor2.length ) ; i++ ) | ||||
| { | ||||
| if ( cursor1[i] < cursor2[i] ) | ||||
| return -1; | ||||
| else if (cursor1[i] > cursor2[i] ) | ||||
| return 1; | ||||
| } | ||||
| if ( cursor1.length < cursor2.length ) | ||||
| return -1; | ||||
| else if (cursor1.length > cursor2.length ) | ||||
| return 1; | ||||
| return 0; | ||||
| } | ||||
| FCKUndo._CheckIsBookmarksEqual = function( bookmark1, bookmark2 ) | ||||
| { | ||||
| if ( ! ( bookmark1 && bookmark2 ) ) | ||||
| return false ; | ||||
| if ( FCKBrowserInfo.IsIE ) | ||||
| { | ||||
| var startOffset1 = bookmark1[1].search( bookmark1[0].StartId ) ; | ||||
| var startOffset2 = bookmark2[1].search( bookmark2[0].StartId ) ; | ||||
| var endOffset1 = bookmark1[1].search( bookmark1[0].EndId ) ; | ||||
| var endOffset2 = bookmark2[1].search( bookmark2[0].EndId ) ; | ||||
| return startOffset1 == startOffset2 && endOffset1 == endOffset2 ; | ||||
| } | ||||
| else | ||||
| { | ||||
| return this._CompareCursors( bookmark1.Start, bookmark2.Start ) == 0 | ||||
| && this._CompareCursors( bookmark1.End, bookmark2.End ) == 0 ; | ||||
| } | ||||
| } | ||||
| FCKUndo.SaveUndoStep = function() | ||||
| { | ||||
| if ( FCK.EditMode != FCK_EDITMODE_WYSIWYG || this.SaveLocked ) | ||||
| return ; | ||||
| // Assume the editor content is changed when SaveUndoStep() is called after the first time. | ||||
| // This also enables the undo button in toolbar. | ||||
| if ( this.SavedData.length ) | ||||
| this.Changed = true ; | ||||
| // Get the HTML content. | ||||
| var sHtml = FCK.EditorDocument.body.innerHTML ; | ||||
| var bookmark = this._GetBookmark() ; | ||||
| // Shrink the array to the current level. | ||||
| this.SavedData = this.SavedData.slice( 0, this.CurrentIndex + 1 ) ; | ||||
| // Cancel operation if the new step is identical to the previous one. | ||||
| if ( this.CurrentIndex > 0 | ||||
| && sHtml == this.SavedData[ this.CurrentIndex ][0] | ||||
| && this._CheckIsBookmarksEqual( bookmark, this.SavedData[ this.CurrentIndex ][1] ) ) | ||||
| return ; | ||||
| // Save the selection and caret position in the first undo level for the first change. | ||||
| else if ( this.CurrentIndex == 0 && this.SavedData.length && sHtml == this.SavedData[0][0] ) | ||||
| { | ||||
| this.SavedData[0][1] = bookmark ; | ||||
| return ; | ||||
| } | ||||
| // If we reach the Maximum number of undo levels, we must remove the first | ||||
| // entry of the list shifting all elements. | ||||
| if ( this.CurrentIndex + 1 >= FCKConfig.MaxUndoLevels ) | ||||
| this.SavedData.shift() ; | ||||
| else | ||||
| this.CurrentIndex++ ; | ||||
| // Save the new level in front of the actual position. | ||||
| this.SavedData[ this.CurrentIndex ] = [ sHtml, bookmark ] ; | ||||
| FCK.Events.FireEvent( "OnSelectionChange" ) ; | ||||
| } | ||||
| FCKUndo.CheckUndoState = function() | ||||
| { | ||||
| return ( this.Changed || this.CurrentIndex > 0 ) ; | ||||
| } | ||||
| FCKUndo.CheckRedoState = function() | ||||
| { | ||||
| return ( this.CurrentIndex < ( this.SavedData.length - 1 ) ) ; | ||||
| } | ||||
| FCKUndo.Undo = function() | ||||
| { | ||||
| if ( this.CheckUndoState() ) | ||||
| { | ||||
| // If it is the first step. | ||||
| if ( this.CurrentIndex == ( this.SavedData.length - 1 ) ) | ||||
| { | ||||
| // Save the actual state for a possible "Redo" call. | ||||
| this.SaveUndoStep() ; | ||||
| } | ||||
| // Go a step back. | ||||
| this._ApplyUndoLevel( --this.CurrentIndex ) ; | ||||
| FCK.Events.FireEvent( "OnSelectionChange" ) ; | ||||
| } | ||||
| } | ||||
| FCKUndo.Redo = function() | ||||
| { | ||||
| if ( this.CheckRedoState() ) | ||||
| { | ||||
| // Go a step forward. | ||||
| this._ApplyUndoLevel( ++this.CurrentIndex ) ; | ||||
| FCK.Events.FireEvent( "OnSelectionChange" ) ; | ||||
| } | ||||
| } | ||||
| FCKUndo._ApplyUndoLevel = function( level ) | ||||
| { | ||||
| var oData = this.SavedData[ level ] ; | ||||
| if ( !oData ) | ||||
| return ; | ||||
| // Update the editor contents with that step data. | ||||
| if ( FCKBrowserInfo.IsIE ) | ||||
| { | ||||
| if ( oData[1] && oData[1][1] ) | ||||
| FCK.SetInnerHtml( oData[1][1] ) ; | ||||
| else | ||||
| FCK.SetInnerHtml( oData[0] ) ; | ||||
| } | ||||
| else | ||||
| FCK.EditorDocument.body.innerHTML = oData[0] ; | ||||
| // Restore the selection | ||||
| this._SelectBookmark( oData[1] ) ; | ||||
| this.TypesCount = 0 ; | ||||
| this.Changed = false ; | ||||
| this.Typing = false ; | ||||
| } | ||||