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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