source: trunk/admin/inc/FCKeditor/editor/_source/internals/fckselection_ie.js@ 2

/*
 * FCKeditor - The text editor for internet
 * Copyright (C) 2003-2006 Frederico Caldeira Knabben
 * 
 * Licensed under the terms of the GNU Lesser General Public License:
 *              http://www.opensource.org/licenses/lgpl-license.php
 * 
 * For further information visit:
 *              http://www.fckeditor.net/
 * 
 * "Support Open Source software. What about a donation today?"
 * 
 * File Name: fckselection_ie.js
 *      Active selection functions. (IE specific implementation)
 * 
 * File Authors:
 *              Frederico Caldeira Knabben (fredck@fckeditor.net)
 */

// Get the selection type.
FCKSelection.GetType = function()
{
        return FCK.EditorDocument.selection.type ;
}

// Retrieves the selected element (if any), just in the case that a single
// element (object like and image or a table) is selected.
FCKSelection.GetSelectedElement = function()
{
        if ( this.GetType() == 'Control' )
        {
                var oRange = FCK.EditorDocument.selection.createRange() ;

                if ( oRange && oRange.item )
                        return FCK.EditorDocument.selection.createRange().item(0) ;
        }
}

FCKSelection.GetParentElement = function()
{
        switch ( this.GetType() )
        {
                case 'Control' :
                        return FCKSelection.GetSelectedElement().parentElement ;
                case 'None' :
                        return ;
                default :
                        return FCK.EditorDocument.selection.createRange().parentElement() ;
        }
}

FCKSelection.SelectNode = function( node )
{
        FCK.Focus() ;
        FCK.EditorDocument.selection.empty() ;

        try 
        {
                // Try to select the node as a control.
                var oRange = FCK.EditorDocument.body.createControlRange() ;
                oRange.addElement( node ) ;
        } 
        catch(e) 
        {
                // If failed, select it as a text range.
                var oRange = FCK.EditorDocument.selection.createRange() ;
                oRange.moveToElementText( node ) ;
        }

        oRange.select() ;
}

FCKSelection.Collapse = function( toStart )
{
        FCK.Focus() ;
        if ( this.GetType() == 'Text' )
        {
                var oRange = FCK.EditorDocument.selection.createRange() ;
                oRange.collapse( toStart == null || toStart === true ) ;
                oRange.select() ;
        }
}

// The "nodeTagName" parameter must be Upper Case.
FCKSelection.HasAncestorNode = function( nodeTagName )
{
        var oContainer ;

        if ( FCK.EditorDocument.selection.type == "Control" )
        {
                oContainer = this.GetSelectedElement() ;
        }
        else
        {
                var oRange  = FCK.EditorDocument.selection.createRange() ;
                oContainer = oRange.parentElement() ;
        }

        while ( oContainer )
        {
                if ( oContainer.tagName == nodeTagName ) return true ;
                oContainer = oContainer.parentNode ;
        }

        return false ;
}

// The "nodeTagName" parameter must be UPPER CASE.
FCKSelection.MoveToAncestorNode = function( nodeTagName )
{
        var oNode ;

        if ( FCK.EditorDocument.selection.type == "Control" )
        {
                var oRange = FCK.EditorDocument.selection.createRange() ;
                for ( i = 0 ; i < oRange.length ; i++ )
                {
                        if (oRange(i).parentNode)
                        {
                                oNode = oRange(i).parentNode ;
                                break ;
                        }
                }
        }
        else
        {
                var oRange  = FCK.EditorDocument.selection.createRange() ;
                oNode = oRange.parentElement() ;
        }

        while ( oNode && oNode.nodeName != nodeTagName )
                oNode = oNode.parentNode ;

        return oNode ;
}

FCKSelection.Delete = function()
{
        // Gets the actual selection.
        var oSel = FCK.EditorDocument.selection ;

        // Deletes the actual selection contents.
        if ( oSel.type.toLowerCase() != "none" )
        {
                oSel.clear() ;
        }

        return oSel ;
}