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/*
Copyright (c) 2003-2012, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/
(function()
{
/**
* Represents a list os CKEDITOR.dom.range objects, which can be easily
* iterated sequentially.
* @constructor
* @param {CKEDITOR.dom.range|Array} [ranges] The ranges contained on this list.
* Note that, if an array of ranges is specified, the range sequence
* should match its DOM order. This class will not help to sort them.
*/
CKEDITOR.dom.rangeList = function( ranges )
{
if ( ranges instanceof CKEDITOR.dom.rangeList )
return ranges;
if ( !ranges )
ranges = [];
else if ( ranges instanceof CKEDITOR.dom.range )
ranges = [ ranges ];
return CKEDITOR.tools.extend( ranges, mixins );
};
var mixins =
/** @lends CKEDITOR.dom.rangeList.prototype */
{
/**
* Creates an instance of the rangeList iterator, it should be used
* only when the ranges processing could be DOM intrusive, which
* means it may pollute and break other ranges in this list.
* Otherwise, it's enough to just iterate over this array in a for loop.
* @returns {CKEDITOR.dom.rangeListIterator}
*/
createIterator : function()
{
var rangeList = this,
bookmark = CKEDITOR.dom.walker.bookmark(),
guard = function( node ) { return ! ( node.is && node.is( 'tr' ) ); },
bookmarks = [],
current;
/**
* @lends CKEDITOR.dom.rangeListIterator.prototype
*/
return {
/**
* Retrieves the next range in the list.
* @param {Boolean} mergeConsequent Whether join two adjacent ranges into single, e.g. consequent table cells.
*/
getNextRange : function( mergeConsequent )
{
current = current == undefined ? 0 : current + 1;
var range = rangeList[ current ];
// Multiple ranges might be mangled by each other.
if ( range && rangeList.length > 1 )
{
// Bookmarking all other ranges on the first iteration,
// the range correctness after it doesn't matter since we'll
// restore them before the next iteration.
if ( !current )
{
// Make sure bookmark correctness by reverse processing.
for ( var i = rangeList.length - 1; i >= 0; i-- )
bookmarks.unshift( rangeList[ i ].createBookmark( true ) );
}
if ( mergeConsequent )
{
// Figure out how many ranges should be merged.
var mergeCount = 0;
while ( rangeList[ current + mergeCount + 1 ] )
{
var doc = range.document,
found = 0,
left = doc.getById( bookmarks[ mergeCount ].endNode ),
right = doc.getById( bookmarks[ mergeCount + 1 ].startNode ),
next;
// Check subsequent range.
while ( 1 )
{
next = left.getNextSourceNode( false );
if ( !right.equals( next ) )
{
// This could be yet another bookmark or
// walking across block boundaries.
if ( bookmark( next ) || ( next.type == CKEDITOR.NODE_ELEMENT && next.isBlockBoundary() ) )
{
left = next;
continue;
}
}
else
found = 1;
break;
}
if ( !found )
break;
mergeCount++;
}
}
range.moveToBookmark( bookmarks.shift() );
// Merge ranges finally after moving to bookmarks.
while( mergeCount-- )
{
next = rangeList[ ++current ];
next.moveToBookmark( bookmarks.shift() );
range.setEnd( next.endContainer, next.endOffset );
}
}
return range;
}
};
},
createBookmarks : function( serializable )
{
var retval = [], bookmark;
for ( var i = 0; i < this.length ; i++ )
{
retval.push( bookmark = this[ i ].createBookmark( serializable, true) );
// Updating the container & offset values for ranges
// that have been touched.
for ( var j = i + 1; j < this.length; j++ )
{
this[ j ] = updateDirtyRange( bookmark, this[ j ] );
this[ j ] = updateDirtyRange( bookmark, this[ j ], true );
}
}
return retval;
},
createBookmarks2 : function( normalized )
{
var bookmarks = [];
for ( var i = 0 ; i < this.length ; i++ )
bookmarks.push( this[ i ].createBookmark2( normalized ) );
return bookmarks;
},
/**
* Move each range in the list to the position specified by a list of bookmarks.
* @param {Array} bookmarks The list of bookmarks, each one matching a range in the list.
*/
moveToBookmarks : function( bookmarks )
{
for ( var i = 0 ; i < this.length ; i++ )
this[ i ].moveToBookmark( bookmarks[ i ] );
}
};
// Update the specified range which has been mangled by previous insertion of
// range bookmark nodes.(#3256)
function updateDirtyRange( bookmark, dirtyRange, checkEnd )
{
var serializable = bookmark.serializable,
container = dirtyRange[ checkEnd ? 'endContainer' : 'startContainer' ],
offset = checkEnd ? 'endOffset' : 'startOffset';
var bookmarkStart = serializable ?
dirtyRange.document.getById( bookmark.startNode )
: bookmark.startNode;
var bookmarkEnd = serializable ?
dirtyRange.document.getById( bookmark.endNode )
: bookmark.endNode;
if ( container.equals( bookmarkStart.getPrevious() ) )
{
dirtyRange.startOffset = dirtyRange.startOffset
- container.getLength()
- bookmarkEnd.getPrevious().getLength();
container = bookmarkEnd.getNext();
}
else if ( container.equals( bookmarkEnd.getPrevious() ) )
{
dirtyRange.startOffset = dirtyRange.startOffset - container.getLength();
container = bookmarkEnd.getNext();
}
container.equals( bookmarkStart.getParent() ) && dirtyRange[ offset ]++;
container.equals( bookmarkEnd.getParent() ) && dirtyRange[ offset ]++;
// Update and return this range.
dirtyRange[ checkEnd ? 'endContainer' : 'startContainer' ] = container;
return dirtyRange;
}
})();
/**
* (Virtual Class) Do not call this constructor. This class is not really part
* of the API. It just describes the return type of {@link CKEDITOR.dom.rangeList#createIterator}.
* @name CKEDITOR.dom.rangeListIterator
* @constructor
* @example
*/
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