text: ﻿/*
   * FCKeditor - The text editor for Internet - http://www.fckeditor.net
   * Copyright (C) 2003-2008 Frederico Caldeira Knabben
   *
   * == BEGIN LICENSE ==
   *
   * Licensed under the terms of any of the following licenses at your
   * choice:
   *
   *  - GNU General Public License Version 2 or later (the "GPL")
   *    http://www.gnu.org/licenses/gpl.htm
   *
   *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
   *    http://www.gnu.org/licenses/lgpl.htm
   *
   *  - Mozilla Public License Version 1.1 or later (the "MPL")
   *    http://www.mozilla.org/MPL/MPL-1.1.htm
   *
   * == END LICENSE ==
   *
   * Class for working with a selection range, much like the W3C DOM Range, but
   * it is not intended to be an implementation of the W3C interface.
   * (IE Implementation)
   */
  
  FCKDomRange.prototype.MoveToSelection = function()
  {
  	this.Release( true ) ;
  
  	this._Range = new FCKW3CRange( this.Window.document ) ;
  
  	var oSel = this.Window.document.selection ;
  
  	if ( oSel.type != 'Control' )
  	{
  		var eMarkerStart	= this._GetSelectionMarkerTag( true ) ;
  		var eMarkerEnd		= this._GetSelectionMarkerTag( false ) ;
  
  		if ( !eMarkerStart && !eMarkerEnd )
  		{
  			this._Range.setStart( this.Window.document.body, 0 ) ;
  			this._UpdateElementInfo() ;
  			return ;
  		}
  
  		// Set the start boundary.
  		this._Range.setStart( eMarkerStart.parentNode, FCKDomTools.GetIndexOf( eMarkerStart ) ) ;
  		eMarkerStart.parentNode.removeChild( eMarkerStart ) ;
  
  		// Set the end boundary.
  		this._Range.setEnd( eMarkerEnd.parentNode, FCKDomTools.GetIndexOf( eMarkerEnd ) ) ;
  		eMarkerEnd.parentNode.removeChild( eMarkerEnd ) ;
  
  		this._UpdateElementInfo() ;
  	}
  	else
  	{
  		var oControl = oSel.createRange().item(0) ;
  
  		if ( oControl )
  		{
  			this._Range.setStartBefore( oControl ) ;
  			this._Range.setEndAfter( oControl ) ;
  			this._UpdateElementInfo() ;
  		}
  	}
  }
  
  FCKDomRange.prototype.Select = function( forceExpand )
  {
  	if ( this._Range )
  		this.SelectBookmark( this.CreateBookmark( true ), forceExpand ) ;
  }
  
  // Not compatible with bookmark created with CreateBookmark2.
  // The bookmark nodes will be deleted from the document.
  FCKDomRange.prototype.SelectBookmark = function( bookmark, forceExpand )
  {
  	var bIsCollapsed = this.CheckIsCollapsed() ;
  	var bIsStartMakerAlone ;
  	var dummySpan ;
  
  	// Create marker tags for the start and end boundaries.
  	var eStartMarker = this.GetBookmarkNode( bookmark, true ) ;
  
  	if ( !eStartMarker )
  		return ;
  
  	var eEndMarker ;
  	if ( !bIsCollapsed )
  		eEndMarker = this.GetBookmarkNode( bookmark, false ) ;
  
  	// Create the main range which will be used for the selection.
  	var oIERange = this.Window.document.body.createTextRange() ;
  
  	// Position the range at the start boundary.
  	oIERange.moveToElementText( eStartMarker ) ;
  	oIERange.moveStart( 'character', 1 ) ;
  
  	if ( eEndMarker )
  	{
  		// Create a tool range for the end.
  		var oIERangeEnd = this.Window.document.body.createTextRange() ;
  
  		// Position the tool range at the end.
  		oIERangeEnd.moveToElementText( eEndMarker ) ;
  
  		// Move the end boundary of the main range to match the tool range.
  		oIERange.setEndPoint( 'EndToEnd', oIERangeEnd ) ;
  		oIERange.moveEnd( 'character', -1 ) ;
  	}
  	else
  	{
  		bIsStartMakerAlone = ( forceExpand || !eStartMarker.previousSibling || eStartMarker.previousSibling.nodeName.toLowerCase() == 'br' ) && !eStartMarker.nextSibing ;
  
  		// Append a temporary <span>&#65279;</span> before the selection.
  		// This is needed to avoid IE destroying selections inside empty
  		// inline elements, like <b></b> (#253).
  		// It is also needed when placing the selection right after an inline
  		// element to avoid the selection moving inside of it.
  		dummySpan = this.Window.document.createElement( 'span' ) ;
  		dummySpan.innerHTML = '&#65279;' ;	// Zero Width No-Break Space (U+FEFF). See #1359.
  		eStartMarker.parentNode.insertBefore( dummySpan, eStartMarker ) ;
  
  		if ( bIsStartMakerAlone )
  		{
  			// To expand empty blocks or line spaces after <br>, we need
  			// instead to have any char, which will be later deleted using the
  			// selection.
  			// \ufeff = Zero Width No-Break Space (U+FEFF). See #1359.
  			eStartMarker.parentNode.insertBefore( this.Window.document.createTextNode( '\ufeff' ), eStartMarker ) ;
  		}
  	}
  
  	if ( !this._Range )
  		this._Range = this.CreateRange() ;
  
  	// Remove the markers (reset the position, because of the changes in the DOM tree).
  	this._Range.setStartBefore( eStartMarker ) ;
  	eStartMarker.parentNode.removeChild( eStartMarker ) ;
  
  	if ( bIsCollapsed )
  	{
  		if ( bIsStartMakerAlone )
  		{
  			// Move the selection start to include the temporary &#65279;.
  			oIERange.moveStart( 'character', -1 ) ;
  
  			oIERange.select() ;
  
  			// Remove our temporary stuff.
  			this.Window.document.selection.clear() ;
  		}
  		else
  			oIERange.select() ;
  
  		FCKDomTools.RemoveNode( dummySpan ) ;
  	}
  	else
  	{
  		this._Range.setEndBefore( eEndMarker ) ;
  		eEndMarker.parentNode.removeChild( eEndMarker ) ;
  		oIERange.select() ;
  	}
  }
  
  FCKDomRange.prototype._GetSelectionMarkerTag = function( toStart )
  {
  	var doc = this.Window.document ;
  	var selection = doc.selection ;
  
  	// Get a range for the start boundary.
  	var oRange ;
  
  	// IE may throw an "unspecified error" on some cases (it happened when
  	// loading _samples/default.htm), so try/catch.
  	try
  	{
  		oRange = selection.createRange() ;
  	}
  	catch (e)
  	{
  		return null ;
  	}
  
  	// IE might take the range object to the main window instead of inside the editor iframe window.
  	// This is known to happen when the editor window has not been selected before (See #933).
  	// We need to avoid that.
  	if ( oRange.parentElement().document != doc )
  		return null ;
  
  	oRange.collapse( toStart === true ) ;
  
  	// Paste a marker element at the collapsed range and get it from the DOM.
  	var sMarkerId = 'fck_dom_range_temp_' + (new Date()).valueOf() + '_' + Math.floor(Math.random()*1000) ;
  	oRange.pasteHTML( '<span id="' + sMarkerId + '"></span>' ) ;
  
  	return doc.getElementById( sMarkerId ) ;
  }
  