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