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