[1257] | 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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