1 | /* |
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2 | * FCKeditor - The text editor for Internet - http://www.fckeditor.net |
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3 | * Copyright (C) 2003-2007 Frederico Caldeira Knabben |
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4 | * |
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5 | * == BEGIN LICENSE == |
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6 | * |
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7 | * Licensed under the terms of any of the following licenses at your |
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8 | * choice: |
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9 | * |
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10 | * - GNU General Public License Version 2 or later (the "GPL") |
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11 | * http://www.gnu.org/licenses/gpl.html |
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12 | * |
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13 | * - GNU Lesser General Public License Version 2.1 or later (the "LGPL") |
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14 | * http://www.gnu.org/licenses/lgpl.html |
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15 | * |
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16 | * - Mozilla Public License Version 1.1 or later (the "MPL") |
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17 | * http://www.mozilla.org/MPL/MPL-1.1.html |
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18 | * |
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19 | * == END LICENSE == |
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20 | * |
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21 | * IE specific implementation for the Undo/Redo system. |
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22 | */ |
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23 | |
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24 | var FCKUndo = new Object() ; |
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25 | |
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26 | FCKUndo.SavedData = new Array() ; |
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27 | FCKUndo.CurrentIndex = -1 ; |
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28 | FCKUndo.TypesCount = FCKUndo.MaxTypes = 25 ; |
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29 | FCKUndo.Typing = false ; |
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30 | |
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31 | FCKUndo.SaveUndoStep = function() |
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32 | { |
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33 | if ( FCK.EditMode != FCK_EDITMODE_WYSIWYG ) |
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34 | return ; |
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35 | |
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36 | // Shrink the array to the current level. |
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37 | FCKUndo.SavedData = FCKUndo.SavedData.slice( 0, FCKUndo.CurrentIndex + 1 ) ; |
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38 | |
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39 | // Get the Actual HTML. |
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40 | var sHtml = FCK.EditorDocument.body.innerHTML ; |
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41 | |
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42 | // Cancel operation if the new step is identical to the previous one. |
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43 | if ( FCKUndo.CurrentIndex >= 0 && sHtml == FCKUndo.SavedData[ FCKUndo.CurrentIndex ][0] ) |
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44 | return ; |
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45 | |
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46 | // If we reach the Maximun number of undo levels, we must remove the first |
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47 | // entry of the list shifting all elements. |
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48 | if ( FCKUndo.CurrentIndex + 1 >= FCKConfig.MaxUndoLevels ) |
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49 | FCKUndo.SavedData.shift() ; |
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50 | else |
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51 | FCKUndo.CurrentIndex++ ; |
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52 | |
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53 | // Get the actual selection. |
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54 | var sBookmark ; |
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55 | if ( FCK.EditorDocument.selection.type == 'Text' ) |
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56 | sBookmark = FCK.EditorDocument.selection.createRange().getBookmark() ; |
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57 | |
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58 | // Save the new level in front of the actual position. |
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59 | FCKUndo.SavedData[ FCKUndo.CurrentIndex ] = [ sHtml, sBookmark ] ; |
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60 | |
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61 | FCK.Events.FireEvent( "OnSelectionChange" ) ; |
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62 | } |
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63 | |
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64 | FCKUndo.CheckUndoState = function() |
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65 | { |
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66 | return ( FCKUndo.Typing || FCKUndo.CurrentIndex > 0 ) ; |
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67 | } |
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68 | |
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69 | FCKUndo.CheckRedoState = function() |
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70 | { |
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71 | return ( !FCKUndo.Typing && FCKUndo.CurrentIndex < ( FCKUndo.SavedData.length - 1 ) ) ; |
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72 | } |
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73 | |
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74 | FCKUndo.Undo = function() |
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75 | { |
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76 | if ( FCKUndo.CheckUndoState() ) |
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77 | { |
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78 | // If it is the first step. |
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79 | if ( FCKUndo.CurrentIndex == ( FCKUndo.SavedData.length - 1 ) ) |
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80 | { |
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81 | // Save the actual state for a possible "Redo" call. |
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82 | FCKUndo.SaveUndoStep() ; |
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83 | } |
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84 | |
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85 | // Go a step back. |
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86 | FCKUndo._ApplyUndoLevel( --FCKUndo.CurrentIndex ) ; |
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87 | |
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88 | FCK.Events.FireEvent( "OnSelectionChange" ) ; |
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89 | } |
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90 | } |
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91 | |
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92 | FCKUndo.Redo = function() |
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93 | { |
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94 | if ( FCKUndo.CheckRedoState() ) |
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95 | { |
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96 | // Go a step forward. |
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97 | FCKUndo._ApplyUndoLevel( ++FCKUndo.CurrentIndex ) ; |
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98 | |
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99 | FCK.Events.FireEvent( "OnSelectionChange" ) ; |
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100 | } |
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101 | } |
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102 | |
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103 | FCKUndo._ApplyUndoLevel = function(level) |
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104 | { |
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105 | var oData = FCKUndo.SavedData[ level ] ; |
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106 | |
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107 | if ( !oData ) |
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108 | return ; |
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109 | |
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110 | // Update the editor contents with that step data. |
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111 | FCK.SetInnerHtml( oData[0] ) ; |
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112 | // FCK.EditorDocument.body.innerHTML = oData[0] ; |
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113 | |
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114 | if ( oData[1] ) |
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115 | { |
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116 | var oRange = FCK.EditorDocument.selection.createRange() ; |
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117 | oRange.moveToBookmark( oData[1] ) ; |
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118 | oRange.select() ; |
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119 | } |
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120 | |
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121 | FCKUndo.TypesCount = 0 ; |
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122 | FCKUndo.Typing = false ; |
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123 | } |
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