[44] | 1 | /*
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| 2 | * FCKeditor - The text editor for internet
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| 3 | * Copyright (C) 2003-2006 Frederico Caldeira Knabben
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| 4 | *
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| 5 | * Licensed under the terms of the GNU Lesser General Public License:
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| 6 | * http://www.opensource.org/licenses/lgpl-license.php
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| 7 | *
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| 8 | * For further information visit:
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| 9 | * http://www.fckeditor.net/
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| 10 | *
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| 11 | * "Support Open Source software. What about a donation today?"
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| 12 | *
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| 13 | * File Name: fckundo_ie.js
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| 14 | * IE specific implementation for the Undo/Redo system.
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| 15 | *
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| 16 | * File Authors:
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| 17 | * Frederico Caldeira Knabben (fredck@fckeditor.net)
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| 18 | */
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| 19 |
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| 20 | var FCKUndo = new Object() ;
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| 21 |
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| 22 | FCKUndo.SavedData = new Array() ;
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| 23 | FCKUndo.CurrentIndex = -1 ;
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| 24 | FCKUndo.TypesCount = FCKUndo.MaxTypes = 25 ;
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| 25 | FCKUndo.Typing = false ;
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| 26 |
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| 27 | FCKUndo.SaveUndoStep = function()
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| 28 | {
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| 29 | if ( FCK.EditMode != FCK_EDITMODE_WYSIWYG )
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| 30 | return ;
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| 31 |
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| 32 | // Shrink the array to the current level.
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| 33 | FCKUndo.SavedData = FCKUndo.SavedData.slice( 0, FCKUndo.CurrentIndex + 1 ) ;
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| 34 |
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| 35 | // Get the Actual HTML.
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| 36 | var sHtml = FCK.EditorDocument.body.innerHTML ;
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| 37 |
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| 38 | // Cancel operation if the new step is identical to the previous one.
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| 39 | if ( FCKUndo.CurrentIndex >= 0 && sHtml == FCKUndo.SavedData[ FCKUndo.CurrentIndex ][0] )
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| 40 | return ;
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| 41 |
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| 42 | // If we reach the Maximun number of undo levels, we must remove the first
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| 43 | // entry of the list shifting all elements.
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| 44 | if ( FCKUndo.CurrentIndex + 1 >= FCKConfig.MaxUndoLevels )
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| 45 | FCKUndo.SavedData.shift() ;
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| 46 | else
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| 47 | FCKUndo.CurrentIndex++ ;
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| 48 |
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| 49 | // Get the actual selection.
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| 50 | var sBookmark ;
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| 51 | if ( FCK.EditorDocument.selection.type == 'Text' )
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| 52 | sBookmark = FCK.EditorDocument.selection.createRange().getBookmark() ;
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| 53 |
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| 54 | // Save the new level in front of the actual position.
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| 55 | FCKUndo.SavedData[ FCKUndo.CurrentIndex ] = [ sHtml, sBookmark ] ;
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| 56 |
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| 57 | FCK.Events.FireEvent( "OnSelectionChange" ) ;
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| 58 | }
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| 59 |
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| 60 | FCKUndo.CheckUndoState = function()
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| 61 | {
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| 62 | return ( FCKUndo.Typing || FCKUndo.CurrentIndex > 0 ) ;
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| 63 | }
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| 64 |
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| 65 | FCKUndo.CheckRedoState = function()
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| 66 | {
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| 67 | return ( !FCKUndo.Typing && FCKUndo.CurrentIndex < ( FCKUndo.SavedData.length - 1 ) ) ;
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| 68 | }
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| 69 |
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| 70 | FCKUndo.Undo = function()
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| 71 | {
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| 72 | if ( FCKUndo.CheckUndoState() )
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| 73 | {
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| 74 | // If it is the first step.
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| 75 | if ( FCKUndo.CurrentIndex == ( FCKUndo.SavedData.length - 1 ) )
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| 76 | {
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| 77 | // Save the actual state for a possible "Redo" call.
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| 78 | FCKUndo.SaveUndoStep() ;
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| 79 | }
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| 80 |
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| 81 | // Go a step back.
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| 82 | FCKUndo._ApplyUndoLevel( --FCKUndo.CurrentIndex ) ;
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| 83 |
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| 84 | FCK.Events.FireEvent( "OnSelectionChange" ) ;
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| 85 | }
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| 86 | }
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| 87 |
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| 88 | FCKUndo.Redo = function()
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| 89 | {
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| 90 | if ( FCKUndo.CheckRedoState() )
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| 91 | {
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| 92 | // Go a step forward.
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| 93 | FCKUndo._ApplyUndoLevel( ++FCKUndo.CurrentIndex ) ;
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| 94 |
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| 95 | FCK.Events.FireEvent( "OnSelectionChange" ) ;
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| 96 | }
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| 97 | }
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| 98 |
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| 99 | FCKUndo._ApplyUndoLevel = function(level)
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| 100 | {
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| 101 | var oData = FCKUndo.SavedData[ level ] ;
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| 102 |
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| 103 | if ( !oData )
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| 104 | return ;
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| 105 |
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| 106 | // Update the editor contents with that step data.
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| 107 | FCK.SetInnerHtml( oData[0] ) ;
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| 108 | // FCK.EditorDocument.body.innerHTML = oData[0] ;
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| 109 |
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| 110 | if ( oData[1] )
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| 111 | {
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| 112 | var oRange = FCK.EditorDocument.selection.createRange() ;
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| 113 | oRange.moveToBookmark( oData[1] ) ;
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| 114 | oRange.select() ;
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| 115 | }
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| 116 |
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| 117 | FCKUndo.TypesCount = 0 ;
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| 118 | FCKUndo.Typing = false ;
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| 119 | } |
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