[Sommaire] [Imprimer]

   1  /*
   2   * FCKeditor - The text editor for Internet - http://www.fckeditor.net
   3   * Copyright (C) 2003-2007 Frederico Caldeira Knabben
   4   * 
   5   * == BEGIN LICENSE ==
   6   * 
   7   * Licensed under the terms of any of the following licenses at your
   8   * choice:
   9   * 
  10   *  - GNU General Public License Version 2 or later (the "GPL")
  11   *    http://www.gnu.org/licenses/gpl.html
  12   * 
  13   *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
  14   *    http://www.gnu.org/licenses/lgpl.html
  15   * 
  16   *  - Mozilla Public License Version 1.1 or later (the "MPL")
  17   *    http://www.mozilla.org/MPL/MPL-1.1.html
  18   * 
  19   * == END LICENSE ==
  20   * 
  21   * File Name: fckdomrange_ie.js
  22   *     Class for working with a selection range, much like the W3C DOM Range, but
  23   *     it is not intented to be an implementation of the W3C interface.
  24   *     (IE Implementation)
  25   * 
  26   * File Authors:
  27   *         Frederico Caldeira Knabben (www.fckeditor.net)
  28   */
  29  
  30  FCKDomRange.prototype.MoveToSelection = function()
  31  {
  32      this.Release( true ) ;
  33  
  34      this._Range = new FCKW3CRange( this.Window.document ) ;
  35  
  36      var oSel = this.Window.document.selection ;
  37      
  38      if ( oSel.type != 'Control' )
  39      {
  40          // Set the start boundary.
  41          eMarker = this._GetSelectionMarkerTag( true ) ;
  42          this._Range.setStart( eMarker.parentNode, FCKDomTools.GetIndexOf( eMarker ) ) ;
  43          eMarker.parentNode.removeChild( eMarker ) ;
  44  
  45          // Set the end boundary.
  46          var eMarker = this._GetSelectionMarkerTag( false ) ;
  47          this._Range.setEnd( eMarker.parentNode, FCKDomTools.GetIndexOf( eMarker ) ) ;
  48          eMarker.parentNode.removeChild( eMarker ) ;
  49          
  50          this._UpdateElementInfo() ;
  51      }
  52      else
  53      {
  54          var oControl = oSel.createRange().item(0) ;
  55          
  56          if ( oControl )
  57          {
  58              this._Range.setStartBefore( oControl ) ;
  59              this._Range.setEndAfter( oControl ) ;
  60              this._UpdateElementInfo() ;
  61          }
  62      }
  63  }
  64  
  65  FCKDomRange.prototype.Select = function()
  66  {
  67      if ( this._Range )
  68      {
  69          var bIsCollapsed = this.CheckIsCollapsed() ;
  70          
  71          // Create marker tags for the start and end boundaries.
  72          var eStartMarker    = this._GetRangeMarkerTag( true ) ;
  73          
  74          if ( !bIsCollapsed )
  75              var eEndMarker    = this._GetRangeMarkerTag( false ) ;
  76  
  77          // Create the main range which will be used for the selection.
  78          var oIERange = this.Window.document.body.createTextRange() ;
  79          
  80          // Position the range at the start boundary.
  81          oIERange.moveToElementText( eStartMarker ) ;
  82          oIERange.moveStart( 'character', 1 ) ;
  83  
  84          if ( !bIsCollapsed )
  85          {
  86              // Create a tool range for the end.
  87              var oIERangeEnd = this.Window.document.body.createTextRange() ;
  88  
  89              // Position the tool range at the end.
  90              oIERangeEnd.moveToElementText( eEndMarker ) ;
  91              
  92              // Move the end boundary of the main range to match the tool range.
  93              oIERange.setEndPoint( 'EndToEnd', oIERangeEnd ) ;
  94              oIERange.moveEnd( 'character', -1 ) ;
  95          }
  96          
  97          // Remove the markers (reset the position, because of the changes in the DOM tree).
  98          this._Range.setStartBefore( eStartMarker ) ;
  99          eStartMarker.parentNode.removeChild( eStartMarker ) ;
 100          
 101          if ( bIsCollapsed )
 102          {
 103              // The following trick is needed so IE makes collapsed selections
 104              // inside empty blocks visible (expands the block).
 105              try
 106              {
 107                  oIERange.pasteHTML(' ') ;
 108                  oIERange.moveStart( 'character', -1 ) ;
 109              }
 110              catch (e){}
 111              oIERange.select() ;
 112              oIERange.pasteHTML('') ;
 113          }
 114          else
 115          {
 116              this._Range.setEndBefore( eEndMarker ) ;
 117              eEndMarker.parentNode.removeChild( eEndMarker ) ;
 118              oIERange.select() ;
 119          }
 120      }
 121  }
 122  
 123  FCKDomRange.prototype._GetSelectionMarkerTag = function( toStart )
 124  {
 125      // Get a range for the start boundary.
 126      var oRange = this.Window.document.selection.createRange() ;
 127      oRange.collapse( toStart === true ) ;
 128      
 129      // Paste a marker element at the collapsed range and get it from the DOM.
 130      var sMarkerId = 'fck_dom_range_temp_' + (new Date()).valueOf() + '_' + Math.floor(Math.random()*1000) ;
 131      oRange.pasteHTML( '<span id="' + sMarkerId + '"></span>' ) ;
 132      return this.Window.document.getElementById( sMarkerId ) ;
 133  }
 134  
 135  FCKDomRange.prototype._GetRangeMarkerTag = function( toStart )
 136  {
 137      // Get a range for the start boundary.
 138      var oRange = this._Range ;
 139      
 140      // insertNode() will add the node at the beginning of the Range, updating
 141      // the endOffset if necessary. So, we can work with the current range in this case.
 142      if ( !toStart )
 143      {
 144          oRange = oRange.cloneRange() ;
 145          oRange.collapse( toStart === true ) ;
 146      }
 147      
 148      var eSpan = this.Window.document.createElement( 'span' ) ;
 149      eSpan.innerHTML = '&nbsp;' ;
 150      oRange.insertNode( eSpan ) ;
 151      
 152      return eSpan ;
 153  }