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fckdomrange.js
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/*
* FCKeditor - The text editor for Internet - http://www.fckeditor.net
* Copyright (C) 2003-2007 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.html
*
* - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
* http://www.gnu.org/licenses/lgpl.html
*
* - Mozilla Public License Version 1.1 or later (the "MPL")
* http://www.mozilla.org/MPL/MPL-1.1.html
*
* == END LICENSE ==
*
* Class for working with a selection range, much like the W3C DOM Range, but
* it is not intented to be an implementation of the W3C interface.
*/
var FCKDomRange = function( sourceWindow )
{
this.Window = sourceWindow ;
}
FCKDomRange.prototype =
{
_UpdateElementInfo : function()
{
if ( !this._Range )
this.Release( true ) ;
else
{
var eStart = this._Range.startContainer ;
var eEnd = this._Range.endContainer ;
var oElementPath = new FCKElementPath( eStart ) ;
this.StartContainer = oElementPath.LastElement ;
this.StartBlock = oElementPath.Block ;
this.StartBlockLimit = oElementPath.BlockLimit ;
if ( eStart != eEnd )
oElementPath = new FCKElementPath( eEnd ) ;
this.EndContainer = oElementPath.LastElement ;
this.EndBlock = oElementPath.Block ;
this.EndBlockLimit = oElementPath.BlockLimit ;
}
},
CreateRange : function()
{
return new FCKW3CRange( this.Window.document ) ;
},
DeleteContents : function()
{
if ( this._Range )
{
this._Range.deleteContents() ;
this._UpdateElementInfo() ;
}
},
ExtractContents : function()
{
if ( this._Range )
{
var docFrag = this._Range.extractContents() ;
this._UpdateElementInfo() ;
return docFrag ;
}
},
CheckIsCollapsed : function()
{
if ( this._Range )
return this._Range.collapsed ;
},
Collapse : function( toStart )
{
if ( this._Range )
this._Range.collapse( toStart ) ;
this._UpdateElementInfo() ;
},
Clone : function()
{
var oClone = FCKTools.CloneObject( this ) ;
if ( this._Range )
oClone._Range = this._Range.cloneRange() ;
return oClone ;
},
MoveToNodeContents : function( targetNode )
{
if ( !this._Range )
this._Range = this.CreateRange() ;
this._Range.selectNodeContents( targetNode ) ;
this._UpdateElementInfo() ;
},
MoveToElementStart : function( targetElement )
{
this.SetStart(targetElement,1) ;
this.SetEnd(targetElement,1) ;
},
// Moves to the first editing point inside a element. For example, in a
// element tree like "<p><b><i></i></b> Text</p>", the start editing point
// is "<p><b><i>^</i></b> Text</p>" (inside <i>).
MoveToElementEditStart : function( targetElement )
{
var child ;
while ( ( child = targetElement.firstChild ) && child.nodeType == 1 && FCKListsLib.EmptyElements[ child.nodeName.toLowerCase() ] == null )
targetElement = child ;
this.MoveToElementStart( targetElement ) ;
},
InsertNode : function( node )
{
if ( this._Range )
this._Range.insertNode( node ) ;
},
CheckIsEmpty : function( ignoreEndBRs )
{
if ( this.CheckIsCollapsed() )
return true ;
// Inserts the contents of the range in a div tag.
var eToolDiv = this.Window.document.createElement( 'div' ) ;
this._Range.cloneContents().AppendTo( eToolDiv ) ;
FCKDomTools.TrimNode( eToolDiv, ignoreEndBRs ) ;
return ( eToolDiv.innerHTML.length == 0 ) ;
},
CheckStartOfBlock : function()
{
// Create a clone of the current range.
var oTestRange = this.Clone() ;
// Collapse it to its start point.
oTestRange.Collapse( true ) ;
// Move the start boundary to the start of the block.
oTestRange.SetStart( oTestRange.StartBlock || oTestRange.StartBlockLimit, 1 ) ;
var bIsStartOfBlock = oTestRange.CheckIsEmpty() ;
oTestRange.Release() ;
return bIsStartOfBlock ;
},
CheckEndOfBlock : function( refreshSelection )
{
// Create a clone of the current range.
var oTestRange = this.Clone() ;
// Collapse it to its end point.
oTestRange.Collapse( false ) ;
// Move the end boundary to the end of the block.
oTestRange.SetEnd( oTestRange.EndBlock || oTestRange.EndBlockLimit, 2 ) ;
var bIsEndOfBlock = oTestRange.CheckIsCollapsed() ;
if ( !bIsEndOfBlock )
{
// Inserts the contents of the range in a div tag.
var eToolDiv = this.Window.document.createElement( 'div' ) ;
oTestRange._Range.cloneContents().AppendTo( eToolDiv ) ;
FCKDomTools.TrimNode( eToolDiv, true ) ;
// Find out if we are in an empty tree of inline elements, like <b><i><span></span></i></b>
bIsEndOfBlock = true ;
var eLastChild = eToolDiv ;
while ( ( eLastChild = eLastChild.lastChild ) )
{
// Check the following:
// 1. Is there more than one node in the parents children?
// 2. Is the node not an element node?
// 3. Is it not a inline element.
if ( eLastChild.previousSibling || eLastChild.nodeType != 1 || FCKListsLib.InlineChildReqElements[ eLastChild.nodeName.toLowerCase() ] == null )
{
// So we are not in the end of the range.
bIsEndOfBlock = false ;
break ;
}
}
}
oTestRange.Release() ;
if ( refreshSelection )
this.Select() ;
return bIsEndOfBlock ;
},
CreateBookmark : function()
{
// Create the bookmark info (random IDs).
var oBookmark =
{
StartId : 'fck_dom_range_start_' + (new Date()).valueOf() + '_' + Math.floor(Math.random()*1000),
EndId : 'fck_dom_range_end_' + (new Date()).valueOf() + '_' + Math.floor(Math.random()*1000)
} ;
var oDoc = this.Window.document ;
var eSpan ;
var oClone ;
// For collapsed ranges, add just the start marker.
if ( !this.CheckIsCollapsed() )
{
eSpan = oDoc.createElement( 'span' ) ;
eSpan.id = oBookmark.EndId ;
eSpan.innerHTML = '&nbsp;' ; // For IE, it must have something inside, otherwise it may be removed during operations.
oClone = this.Clone() ;
oClone.Collapse( false ) ;
oClone.InsertNode( eSpan ) ;
}
eSpan = oDoc.createElement( 'span' ) ;
eSpan.id = oBookmark.StartId ;
eSpan.innerHTML = '&nbsp;' ; // For IE, it must have something inside, otherwise it may be removed during operations.
oClone = this.Clone() ;
oClone.Collapse( true ) ;
oClone.InsertNode( eSpan ) ;
return oBookmark ;
},
MoveToBookmark : function( bookmark, preserveBookmark )
{
var oDoc = this.Window.document ;
var eStartSpan = oDoc.getElementById( bookmark.StartId ) ;
var eEndSpan = oDoc.getElementById( bookmark.EndId ) ;
this.SetStart( eStartSpan, 3 ) ;
if ( !preserveBookmark )
FCKDomTools.RemoveNode( eStartSpan ) ;
// If collapsed, the start span will not be available.
if ( eEndSpan )
{
this.SetEnd( eEndSpan, 3 ) ;
if ( !preserveBookmark )
FCKDomTools.RemoveNode( eEndSpan ) ;
}
else
this.Collapse( true ) ;
},
/*
* Moves the position of the start boundary of the range to a specific position
* relatively to a element.
* @position:
* 1 = After Start <target>^contents</target>
* 2 = Before End <target>contents^</target>
* 3 = Before Start ^<target>contents</target>
* 4 = After End <target>contents</target>^
*/
SetStart : function( targetElement, position )
{
var oRange = this._Range ;
if ( !oRange )
oRange = this._Range = this.CreateRange() ;
switch( position )
{
case 1 : // After Start <target>^contents</target>
oRange.setStart( targetElement, 0 ) ;
break ;
case 2 : // Before End <target>contents^</target>
oRange.setStart( targetElement, targetElement.childNodes.length ) ;
break ;
case 3 : // Before Start ^<target>contents</target>
oRange.setStartBefore( targetElement ) ;
break ;
case 4 : // After End <target>contents</target>^
oRange.setStartAfter( targetElement ) ;
}
this._UpdateElementInfo() ;
},
/*
* Moves the position of the start boundary of the range to a specific position
* relatively to a element.
* @position:
* 1 = After Start <target>^contents</target>
* 2 = Before End <target>contents^</target>
* 3 = Before Start ^<target>contents</target>
* 4 = After End <target>contents</target>^
*/
SetEnd : function( targetElement, position )
{
var oRange = this._Range ;
if ( !oRange )
oRange = this._Range = this.CreateRange() ;
switch( position )
{
case 1 : // After Start <target>^contents</target>
oRange.setEnd( targetElement, 0 ) ;
break ;
case 2 : // Before End <target>contents^</target>
oRange.setEnd( targetElement, targetElement.childNodes.length ) ;
break ;
case 3 : // Before Start ^<target>contents</target>
oRange.setEndBefore( targetElement ) ;
break ;
case 4 : // After End <target>contents</target>^
oRange.setEndAfter( targetElement ) ;
}
this._UpdateElementInfo() ;
},
Expand : function( unit )
{
var oNode, oSibling ;
switch ( unit )
{
case 'block_contents' :
if ( this.StartBlock )
this.SetStart( this.StartBlock, 1 ) ;
else
{
// Get the start node for the current range.
oNode = this._Range.startContainer ;
// If it is an element, get the current child node for the range (in the offset).
// If the offset node is not available, the the first one.
if ( oNode.nodeType == 1 )
{
if ( !( oNode = oNode.childNodes[ this._Range.startOffset ] ) )
oNode = oNode.firstChild ;
}
// Not able to defined the current position.
if ( !oNode )
return ;
// We must look for the left boundary, relative to the range
// start, which is limited by a block element.
while ( true )
{
oSibling = oNode.previousSibling ;
if ( !oSibling )
{
// Continue if we are not yet in the block limit (inside a <b>, for example).
if ( oNode.parentNode != this.StartBlockLimit )
oNode = oNode.parentNode ;
else
break ;
}
else if ( oSibling.nodeType != 1 || !(/^(?:P|DIV|H1|H2|H3|H4|H5|H6|ADDRESS|PRE|OL|UL|LI|DT|DE)$/).test( oSibling.nodeName.toUpperCase() ) )
{
// Continue if the sibling is not a block tag.
oNode = oSibling ;
}
else
break ;
}
this._Range.setStartBefore( oNode ) ;
}
if ( this.EndBlock )
this.SetEnd( this.EndBlock, 2 ) ;
else
{
oNode = this._Range.endContainer ;
if ( oNode.nodeType == 1 )
oNode = oNode.childNodes[ this._Range.endOffset ] || oNode.lastChild ;
if ( !oNode )
return ;
// We must look for the right boundary, relative to the range
// end, which is limited by a block element.
while ( true )
{
oSibling = oNode.nextSibling ;
if ( !oSibling )
{
// Continue if we are not yet in the block limit (inide a <b>, for example).
if ( oNode.parentNode != this.EndBlockLimit )
oNode = oNode.parentNode ;
else
break ;
}
else if ( oSibling.nodeType != 1 || !(/^(?:P|DIV|H1|H2|H3|H4|H5|H6|ADDRESS|PRE|OL|UL|LI|DT|DE)$/).test( oSibling.nodeName.toUpperCase() ) )
{
// Continue if the sibling is not a block tag.
oNode = oSibling ;
}
else
break ;
}
this._Range.setEndAfter( oNode ) ;
}
this._UpdateElementInfo() ;
}
},
Release : function( preserveWindow )
{
if ( !preserveWindow )
this.Window = null ;
this.StartContainer = null ;
this.StartBlock = null ;
this.StartBlockLimit = null ;
this.EndContainer = null ;
this.EndBlock = null ;
this.EndBlockLimit = null ;
this._Range = null ;
}
} ;

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