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/*
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* FCKeditor - The text editor for internet
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* Copyright (C) 2003-2006 Frederico Caldeira Knabben
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*
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* Licensed under the terms of the GNU Lesser General Public License:
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* http://www.opensource.org/licenses/lgpl-license.php
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*
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* For further information visit:
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* http://www.fckeditor.net/
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*
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* "Support Open Source software. What about a donation today?"
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*
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* File Name: fckundo_ie.js
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* IE specific implementation for the Undo/Redo system.
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*
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* File Authors:
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* Frederico Caldeira Knabben (fredck@fckeditor.net)
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*/
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var FCKUndo = new Object() ;
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FCKUndo.SavedData = new Array() ;
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FCKUndo.CurrentIndex = -1 ;
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FCKUndo.TypesCount = FCKUndo.MaxTypes = 25 ;
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FCKUndo.Typing = false ;
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FCKUndo.SaveUndoStep = function()
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{
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if ( FCK.EditMode != FCK_EDITMODE_WYSIWYG )
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return ;
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// Shrink the array to the current level.
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FCKUndo.SavedData = FCKUndo.SavedData.slice( 0, FCKUndo.CurrentIndex + 1 ) ;
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// Get the Actual HTML.
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var sHtml = FCK.EditorDocument.body.innerHTML ;
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// Cancel operation if the new step is identical to the previous one.
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if ( FCKUndo.CurrentIndex >= 0 && sHtml == FCKUndo.SavedData[ FCKUndo.CurrentIndex ][0] )
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return ;
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// If we reach the Maximun number of undo levels, we must remove the first
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// entry of the list shifting all elements.
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if ( FCKUndo.CurrentIndex + 1 >= FCKConfig.MaxUndoLevels )
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FCKUndo.SavedData.shift() ;
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else
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FCKUndo.CurrentIndex++ ;
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// Get the actual selection.
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var sBookmark ;
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if ( FCK.EditorDocument.selection.type == 'Text' )
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sBookmark = FCK.EditorDocument.selection.createRange().getBookmark() ;
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// Save the new level in front of the actual position.
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FCKUndo.SavedData[ FCKUndo.CurrentIndex ] = [ sHtml, sBookmark ] ;
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FCK.Events.FireEvent( "OnSelectionChange" ) ;
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}
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FCKUndo.CheckUndoState = function()
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{
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return ( FCKUndo.Typing || FCKUndo.CurrentIndex > 0 ) ;
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}
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FCKUndo.CheckRedoState = function()
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{
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return ( !FCKUndo.Typing && FCKUndo.CurrentIndex < ( FCKUndo.SavedData.length - 1 ) ) ;
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}
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FCKUndo.Undo = function()
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{
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if ( FCKUndo.CheckUndoState() )
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{
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// If it is the first step.
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if ( FCKUndo.CurrentIndex == ( FCKUndo.SavedData.length - 1 ) )
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{
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// Save the actual state for a possible "Redo" call.
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FCKUndo.SaveUndoStep() ;
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}
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// Go a step back.
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FCKUndo._ApplyUndoLevel( --FCKUndo.CurrentIndex ) ;
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FCK.Events.FireEvent( "OnSelectionChange" ) ;
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}
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}
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FCKUndo.Redo = function()
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{
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if ( FCKUndo.CheckRedoState() )
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{
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// Go a step forward.
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FCKUndo._ApplyUndoLevel( ++FCKUndo.CurrentIndex ) ;
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FCK.Events.FireEvent( "OnSelectionChange" ) ;
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}
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}
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FCKUndo._ApplyUndoLevel = function(level)
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{
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var oData = FCKUndo.SavedData[ level ] ;
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if ( !oData )
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return ;
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// Update the editor contents with that step data.
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FCK.SetInnerHtml( oData[0] ) ;
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// FCK.EditorDocument.body.innerHTML = oData[0] ;
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if ( oData[1] )
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{
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var oRange = FCK.EditorDocument.selection.createRange() ;
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oRange.moveToBookmark( oData[1] ) ;
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oRange.select() ;
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}
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FCKUndo.TypesCount = 0 ;
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FCKUndo.Typing = false ;
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}
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