[Sommaire] [Imprimer]

   1  var FCKUndo = new Object() ;
   2  
   3  FCKUndo.SavedData = new Array() ;
   4  FCKUndo.CurrentIndex = -1 ;
   5  FCKUndo.TypesCount = FCKUndo.MaxTypes = 25 ;
   6  FCKUndo.Typing = false ;
   7  
   8  FCKUndo.SaveUndoStep = function()
   9  {
  10      // Shrink the array to the current level.
  11      FCKUndo.SavedData = FCKUndo.SavedData.slice( 0, FCKUndo.CurrentIndex + 1 ) ;
  12  
  13      // Get the Actual HTML.
  14      var sHtml = FCK.EditorDocument.body.innerHTML ;
  15  
  16      // Cancel operation if the new step is identical to the previous one.
  17      if ( FCKUndo.CurrentIndex >= 0 && sHtml == FCKUndo.SavedData[ FCKUndo.CurrentIndex ][0] )
  18          return ;
  19  
  20      // If we reach the Maximun number of undo levels, we must remove the first
  21      // entry of the list shifting all elements.
  22      if ( FCKUndo.CurrentIndex + 1 >= FCKConfig.MaxUndoLevels )
  23          FCKUndo.SavedData.shift() ;
  24      else
  25          FCKUndo.CurrentIndex++ ;
  26  
  27      // Get the actual selection.
  28      var sBookmark ;
  29      if ( FCK.EditorDocument.selection.type == 'Text' )
  30          sBookmark = FCK.EditorDocument.selection.createRange().getBookmark() ;
  31  
  32      // Save the new level in front of the actual position.
  33      FCKUndo.SavedData[ FCKUndo.CurrentIndex ] = [ sHtml, sBookmark ] ;
  34  
  35      FCK.Events.FireEvent( "OnSelectionChange" ) ;
  36  }
  37  
  38  FCKUndo.CheckUndoState = function()
  39  {
  40      return ( FCKUndo.Typing || FCKUndo.CurrentIndex > 0 ) ;
  41  }
  42  
  43  FCKUndo.CheckRedoState = function()
  44  {
  45      return ( !FCKUndo.Typing && FCKUndo.CurrentIndex < ( FCKUndo.SavedData.length - 1 ) ) ;
  46  }
  47  
  48  FCKUndo.Undo = function()
  49  {
  50      if ( FCKUndo.CheckUndoState() )
  51      {
  52          // If it is the first step.
  53          if ( FCKUndo.CurrentIndex == ( FCKUndo.SavedData.length - 1 ) )
  54          {
  55              // Save the actual state for a possible "Redo" call.
  56              FCKUndo.SaveUndoStep() ;
  57          }
  58  
  59          // Go a step back.
  60          FCKUndo._ApplyUndoLevel( --FCKUndo.CurrentIndex ) ;
  61  
  62          FCK.Events.FireEvent( "OnSelectionChange" ) ;
  63      }
  64  }
  65  
  66  FCKUndo.Redo = function()
  67  {
  68      if ( FCKUndo.CheckRedoState() )
  69      {
  70          // Go a step forward.
  71          FCKUndo._ApplyUndoLevel( ++FCKUndo.CurrentIndex ) ;
  72  
  73          FCK.Events.FireEvent( "OnSelectionChange" ) ;
  74      }
  75  }
  76  
  77  FCKUndo._ApplyUndoLevel = function(level)
  78  {
  79      var oData = FCKUndo.SavedData[ level ] ;
  80      
  81      if ( !oData )
  82          return ;
  83  
  84      // Update the editor contents with that step data.
  85      FCK.SetInnerHtml( oData[0] ) ;
  86  //    FCK.EditorDocument.body.innerHTML = oData[0] ;
  87  
  88      if ( oData[1] ) 
  89      {
  90          var oRange = FCK.EditorDocument.selection.createRange() ;
  91          oRange.moveToBookmark( oData[1] ) ;
  92          oRange.select() ;
  93      }
  94      
  95      FCKUndo.TypesCount = 0 ; 
  96      FCKUndo.Typing = false ;
  97  }