/*
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* FCKeditor - The text editor for Internet - http://www.fckeditor.net
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* Copyright (C) 2003-2009 Frederico Caldeira Knabben
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*
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* == BEGIN LICENSE ==
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*
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* Licensed under the terms of any of the following licenses at your
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* choice:
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*
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* - GNU General Public License Version 2 or later (the "GPL")
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* http://www.gnu.org/licenses/gpl.html
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*
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* - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
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* http://www.gnu.org/licenses/lgpl.html
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*
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* - Mozilla Public License Version 1.1 or later (the "MPL")
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* http://www.mozilla.org/MPL/MPL-1.1.html
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*
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* == END LICENSE ==
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*
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* This class partially implements the W3C DOM Range for browser that don't
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* support the standards (like IE):
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* http://www.w3.org/TR/DOM-Level-2-Traversal-Range/ranges.html
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*/
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var FCKW3CRange = function( parentDocument )
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{
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this._Document = parentDocument ;
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this.startContainer = null ;
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this.startOffset = null ;
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this.endContainer = null ;
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this.endOffset = null ;
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this.collapsed = true ;
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}
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FCKW3CRange.CreateRange = function( parentDocument )
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{
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// We could opt to use the Range implementation of the browsers. The problem
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// is that every browser have different bugs on their implementations,
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// mostly related to different interpretations of the W3C specifications.
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// So, for now, let's use our implementation and pray for browsers fixings
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// soon. Otherwise will go crazy on trying to find out workarounds.
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/*
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// Get the browser implementation of the range, if available.
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if ( parentDocument.createRange )
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{
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var range = parentDocument.createRange() ;
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if ( typeof( range.startContainer ) != 'undefined' )
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return range ;
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}
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*/
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return new FCKW3CRange( parentDocument ) ;
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}
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FCKW3CRange.CreateFromRange = function( parentDocument, sourceRange )
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{
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var range = FCKW3CRange.CreateRange( parentDocument ) ;
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range.setStart( sourceRange.startContainer, sourceRange.startOffset ) ;
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range.setEnd( sourceRange.endContainer, sourceRange.endOffset ) ;
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return range ;
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}
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FCKW3CRange.prototype =
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{
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_UpdateCollapsed : function()
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{
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this.collapsed = ( this.startContainer == this.endContainer && this.startOffset == this.endOffset ) ;
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},
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// W3C requires a check for the new position. If it is after the end
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// boundary, the range should be collapsed to the new start. It seams we
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// will not need this check for our use of this class so we can ignore it for now.
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setStart : function( refNode, offset )
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{
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this.startContainer = refNode ;
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this.startOffset = offset ;
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if ( !this.endContainer )
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{
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this.endContainer = refNode ;
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this.endOffset = offset ;
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}
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this._UpdateCollapsed() ;
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},
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// W3C requires a check for the new position. If it is before the start
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// boundary, the range should be collapsed to the new end. It seams we
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// will not need this check for our use of this class so we can ignore it for now.
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setEnd : function( refNode, offset )
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{
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this.endContainer = refNode ;
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this.endOffset = offset ;
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if ( !this.startContainer )
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{
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this.startContainer = refNode ;
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this.startOffset = offset ;
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}
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this._UpdateCollapsed() ;
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},
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setStartAfter : function( refNode )
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{
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this.setStart( refNode.parentNode, FCKDomTools.GetIndexOf( refNode ) + 1 ) ;
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},
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setStartBefore : function( refNode )
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{
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this.setStart( refNode.parentNode, FCKDomTools.GetIndexOf( refNode ) ) ;
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},
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setEndAfter : function( refNode )
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{
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this.setEnd( refNode.parentNode, FCKDomTools.GetIndexOf( refNode ) + 1 ) ;
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},
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setEndBefore : function( refNode )
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{
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this.setEnd( refNode.parentNode, FCKDomTools.GetIndexOf( refNode ) ) ;
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},
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collapse : function( toStart )
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{
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if ( toStart )
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{
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this.endContainer = this.startContainer ;
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this.endOffset = this.startOffset ;
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}
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else
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{
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this.startContainer = this.endContainer ;
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this.startOffset = this.endOffset ;
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}
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this.collapsed = true ;
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},
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selectNodeContents : function( refNode )
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{
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this.setStart( refNode, 0 ) ;
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this.setEnd( refNode, refNode.nodeType == 3 ? refNode.data.length : refNode.childNodes.length ) ;
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},
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insertNode : function( newNode )
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{
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var startContainer = this.startContainer ;
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var startOffset = this.startOffset ;
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// If we are in a text node.
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if ( startContainer.nodeType == 3 )
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{
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startContainer.splitText( startOffset ) ;
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// Check if it is necessary to update the end boundary.
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if ( startContainer == this.endContainer )
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this.setEnd( startContainer.nextSibling, this.endOffset - this.startOffset ) ;
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// Insert the new node it after the text node.
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FCKDomTools.InsertAfterNode( startContainer, newNode ) ;
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return ;
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}
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else
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{
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// Simply insert the new node before the current start node.
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startContainer.insertBefore( newNode, startContainer.childNodes[ startOffset ] || null ) ;
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// Check if it is necessary to update the end boundary.
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if ( startContainer == this.endContainer )
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{
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this.endOffset++ ;
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this.collapsed = false ;
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}
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}
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},
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deleteContents : function()
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{
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if ( this.collapsed )
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return ;
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this._ExecContentsAction( 0 ) ;
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},
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extractContents : function()
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{
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var docFrag = new FCKDocumentFragment( this._Document ) ;
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if ( !this.collapsed )
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this._ExecContentsAction( 1, docFrag ) ;
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return docFrag ;
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},
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// The selection may be lost when cloning (due to the splitText() call).
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cloneContents : function()
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{
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var docFrag = new FCKDocumentFragment( this._Document ) ;
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if ( !this.collapsed )
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this._ExecContentsAction( 2, docFrag ) ;
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return docFrag ;
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},
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_ExecContentsAction : function( action, docFrag )
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{
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var startNode = this.startContainer ;
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var endNode = this.endContainer ;
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var startOffset = this.startOffset ;
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var endOffset = this.endOffset ;
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var removeStartNode = false ;
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var removeEndNode = false ;
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// Check the start and end nodes and make the necessary removals or changes.
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// Start from the end, otherwise DOM mutations (splitText) made in the
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// start boundary may interfere on the results here.
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// For text containers, we must simply split the node and point to the
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// second part. The removal will be handled by the rest of the code .
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if ( endNode.nodeType == 3 )
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endNode = endNode.splitText( endOffset ) ;
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else
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{
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// If the end container has children and the offset is pointing
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// to a child, then we should start from it.
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if ( endNode.childNodes.length > 0 )
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{
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// If the offset points after the last node.
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if ( endOffset > endNode.childNodes.length - 1 )
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{
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// Let's create a temporary node and mark it for removal.
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endNode = FCKDomTools.InsertAfterNode( endNode.lastChild, this._Document.createTextNode('') ) ;
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removeEndNode = true ;
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}
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else
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endNode = endNode.childNodes[ endOffset ] ;
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}
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}
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// For text containers, we must simply split the node. The removal will
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// be handled by the rest of the code .
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if ( startNode.nodeType == 3 )
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{
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startNode.splitText( startOffset ) ;
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// In cases the end node is the same as the start node, the above
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// splitting will also split the end, so me must move the end to
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// the second part of the split.
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if ( startNode == endNode )
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endNode = startNode.nextSibling ;
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}
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else
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{
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// If the start container has children and the offset is pointing
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// to a child, then we should start from its previous sibling.
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// If the offset points to the first node, we don't have a
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// sibling, so let's use the first one, but mark it for removal.
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if ( startOffset == 0 )
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{
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// Let's create a temporary node and mark it for removal.
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startNode = startNode.insertBefore( this._Document.createTextNode(''), startNode.firstChild ) ;
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removeStartNode = true ;
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}
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else if ( startOffset > startNode.childNodes.length - 1 )
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{
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// Let's create a temporary node and mark it for removal.
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startNode = startNode.appendChild( this._Document.createTextNode('') ) ;
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removeStartNode = true ;
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}
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else
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startNode = startNode.childNodes[ startOffset ].previousSibling ;
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}
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// Get the parent nodes tree for the start and end boundaries.
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var startParents = FCKDomTools.GetParents( startNode ) ;
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var endParents = FCKDomTools.GetParents( endNode ) ;
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// Compare them, to find the top most siblings.
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var i, topStart, topEnd ;
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for ( i = 0 ; i < startParents.length ; i++ )
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{
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topStart = startParents[i] ;
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topEnd = endParents[i] ;
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// The compared nodes will match until we find the top most
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// siblings (different nodes that have the same parent).
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// "i" will hold the index in the parents array for the top
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// most element.
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if ( topStart != topEnd )
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break ;
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}
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var clone, levelStartNode, levelClone, currentNode, currentSibling ;
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if ( docFrag )
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clone = docFrag.RootNode ;
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// Remove all successive sibling nodes for every node in the
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// startParents tree.
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for ( var j = i ; j < startParents.length ; j++ )
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{
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levelStartNode = startParents[j] ;
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// For Extract and Clone, we must clone this level.
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if ( clone && levelStartNode != startNode ) // action = 0 = Delete
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levelClone = clone.appendChild( levelStartNode.cloneNode( levelStartNode == startNode ) ) ;
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currentNode = levelStartNode.nextSibling ;
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while( currentNode )
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{
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// Stop processing when the current node matches a node in the
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// endParents tree or if it is the endNode.
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if ( currentNode == endParents[j] || currentNode == endNode )
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break ;
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// Cache the next sibling.
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currentSibling = currentNode.nextSibling ;
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// If cloning, just clone it.
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if ( action == 2 ) // 2 = Clone
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clone.appendChild( currentNode.cloneNode( true ) ) ;
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else
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{
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// Both Delete and Extract will remove the node.
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currentNode.parentNode.removeChild( currentNode ) ;
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// When Extracting, move the removed node to the docFrag.
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if ( action == 1 ) // 1 = Extract
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clone.appendChild( currentNode ) ;
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}
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currentNode = currentSibling ;
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}
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if ( clone )
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clone = levelClone ;
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}
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if ( docFrag )
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clone = docFrag.RootNode ;
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// Remove all previous sibling nodes for every node in the
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// endParents tree.
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for ( var k = i ; k < endParents.length ; k++ )
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{
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levelStartNode = endParents[k] ;
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// For Extract and Clone, we must clone this level.
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if ( action > 0 && levelStartNode != endNode ) // action = 0 = Delete
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levelClone = clone.appendChild( levelStartNode.cloneNode( levelStartNode == endNode ) ) ;
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// The processing of siblings may have already been done by the parent.
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if ( !startParents[k] || levelStartNode.parentNode != startParents[k].parentNode )
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{
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currentNode = levelStartNode.previousSibling ;
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while( currentNode )
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{
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// Stop processing when the current node matches a node in the
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// startParents tree or if it is the startNode.
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if ( currentNode == startParents[k] || currentNode == startNode )
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break ;
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// Cache the next sibling.
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currentSibling = currentNode.previousSibling ;
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// If cloning, just clone it.
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if ( action == 2 ) // 2 = Clone
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clone.insertBefore( currentNode.cloneNode( true ), clone.firstChild ) ;
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else
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{
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// Both Delete and Extract will remove the node.
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currentNode.parentNode.removeChild( currentNode ) ;
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// When Extracting, mode the removed node to the docFrag.
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if ( action == 1 ) // 1 = Extract
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clone.insertBefore( currentNode, clone.firstChild ) ;
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}
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currentNode = currentSibling ;
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}
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}
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if ( clone )
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clone = levelClone ;
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}
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if ( action == 2 ) // 2 = Clone.
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{
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// No changes in the DOM should be done, so fix the split text (if any).
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var startTextNode = this.startContainer ;
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if ( startTextNode.nodeType == 3 )
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{
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startTextNode.data += startTextNode.nextSibling.data ;
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startTextNode.parentNode.removeChild( startTextNode.nextSibling ) ;
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}
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var endTextNode = this.endContainer ;
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if ( endTextNode.nodeType == 3 && endTextNode.nextSibling )
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{
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endTextNode.data += endTextNode.nextSibling.data ;
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endTextNode.parentNode.removeChild( endTextNode.nextSibling ) ;
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}
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}
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else
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{
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// Collapse the range.
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// If a node has been partially selected, collapse the range between
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// topStart and topEnd. Otherwise, simply collapse it to the start. (W3C specs).
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if ( topStart && topEnd && ( startNode.parentNode != topStart.parentNode || endNode.parentNode != topEnd.parentNode ) )
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{
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var endIndex = FCKDomTools.GetIndexOf( topEnd ) ;
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// If the start node is to be removed, we must correct the
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// index to reflect the removal.
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if ( removeStartNode && topEnd.parentNode == startNode.parentNode )
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endIndex-- ;
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this.setStart( topEnd.parentNode, endIndex ) ;
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}
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// Collapse it to the start.
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this.collapse( true ) ;
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}
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// Cleanup any marked node.
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if( removeStartNode )
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startNode.parentNode.removeChild( startNode ) ;
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if( removeEndNode && endNode.parentNode )
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endNode.parentNode.removeChild( endNode ) ;
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},
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cloneRange : function()
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{
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return FCKW3CRange.CreateFromRange( this._Document, this ) ;
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}
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} ;
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