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/*
Copyright (c) 2003-2012, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/
/**
* @file DOM iterator, which iterates over list items, lines and paragraphs.
*/
CKEDITOR.plugins.add( 'domiterator' );
(function()
{
/**
* @name CKEDITOR.dom.iterator
*/
function iterator( range )
{
if ( arguments.length < 1 )
return;
this.range = range;
this.forceBrBreak = 0;
// Whether include <br>s into the enlarged range.(#3730).
this.enlargeBr = 1;
this.enforceRealBlocks = 0;
this._ || ( this._ = {} );
}
var beginWhitespaceRegex = /^[\r\n\t ]+$/,
// Ignore bookmark nodes.(#3783)
bookmarkGuard = CKEDITOR.dom.walker.bookmark( false, true ),
whitespacesGuard = CKEDITOR.dom.walker.whitespaces( true ),
skipGuard = function( node ) { return bookmarkGuard( node ) && whitespacesGuard( node ); };
// Get a reference for the next element, bookmark nodes are skipped.
function getNextSourceNode( node, startFromSibling, lastNode )
{
var next = node.getNextSourceNode( startFromSibling, null, lastNode );
while ( !bookmarkGuard( next ) )
next = next.getNextSourceNode( startFromSibling, null, lastNode );
return next;
}
iterator.prototype = {
getNextParagraph : function( blockTag )
{
// The block element to be returned.
var block;
// The range object used to identify the paragraph contents.
var range;
// Indicats that the current element in the loop is the last one.
var isLast;
// Indicate at least one of the range boundaries is inside a preformat block.
var touchPre;
// Instructs to cleanup remaining BRs.
var removePreviousBr, removeLastBr;
// This is the first iteration. Let's initialize it.
if ( !this._.started )
{
range = this.range.clone();
// Shrink the range to exclude harmful "noises" (#4087, #4450, #5435).
range.shrink( CKEDITOR.NODE_ELEMENT, true );
touchPre = range.endContainer.hasAscendant( 'pre', true )
|| range.startContainer.hasAscendant( 'pre', true );
range.enlarge( this.forceBrBreak && !touchPre || !this.enlargeBr ?
CKEDITOR.ENLARGE_LIST_ITEM_CONTENTS : CKEDITOR.ENLARGE_BLOCK_CONTENTS );
if ( !range.collapsed )
{
var walker = new CKEDITOR.dom.walker( range.clone() ),
ignoreBookmarkTextEvaluator = CKEDITOR.dom.walker.bookmark( true, true );
// Avoid anchor inside bookmark inner text.
walker.evaluator = ignoreBookmarkTextEvaluator;
this._.nextNode = walker.next();
// TODO: It's better to have walker.reset() used here.
walker = new CKEDITOR.dom.walker( range.clone() );
walker.evaluator = ignoreBookmarkTextEvaluator;
var lastNode = walker.previous();
this._.lastNode = lastNode.getNextSourceNode( true );
// We may have an empty text node at the end of block due to [3770].
// If that node is the lastNode, it would cause our logic to leak to the
// next block.(#3887)
if ( this._.lastNode &&
this._.lastNode.type == CKEDITOR.NODE_TEXT &&
!CKEDITOR.tools.trim( this._.lastNode.getText() ) &&
this._.lastNode.getParent().isBlockBoundary() )
{
var testRange = new CKEDITOR.dom.range( range.document );
testRange.moveToPosition( this._.lastNode, CKEDITOR.POSITION_AFTER_END );
if ( testRange.checkEndOfBlock() )
{
var path = new CKEDITOR.dom.elementPath( testRange.endContainer );
var lastBlock = path.block || path.blockLimit;
this._.lastNode = lastBlock.getNextSourceNode( true );
}
}
// Probably the document end is reached, we need a marker node.
if ( !this._.lastNode )
{
this._.lastNode = this._.docEndMarker = range.document.createText( '' );
this._.lastNode.insertAfter( lastNode );
}
// Let's reuse this variable.
range = null;
}
this._.started = 1;
}
var currentNode = this._.nextNode;
lastNode = this._.lastNode;
this._.nextNode = null;
while ( currentNode )
{
// closeRange indicates that a paragraph boundary has been found,
// so the range can be closed.
var closeRange = 0,
parentPre = currentNode.hasAscendant( 'pre' );
// includeNode indicates that the current node is good to be part
// of the range. By default, any non-element node is ok for it.
var includeNode = ( currentNode.type != CKEDITOR.NODE_ELEMENT ),
continueFromSibling = 0;
// If it is an element node, let's check if it can be part of the
// range.
if ( !includeNode )
{
var nodeName = currentNode.getName();
if ( currentNode.isBlockBoundary( this.forceBrBreak &&
!parentPre && { br : 1 } ) )
{
// <br> boundaries must be part of the range. It will
// happen only if ForceBrBreak.
if ( nodeName == 'br' )
includeNode = 1;
else if ( !range && !currentNode.getChildCount() && nodeName != 'hr' )
{
// If we have found an empty block, and haven't started
// the range yet, it means we must return this block.
block = currentNode;
isLast = currentNode.equals( lastNode );
break;
}
// The range must finish right before the boundary,
// including possibly skipped empty spaces. (#1603)
if ( range )
{
range.setEndAt( currentNode, CKEDITOR.POSITION_BEFORE_START );
// The found boundary must be set as the next one at this
// point. (#1717)
if ( nodeName != 'br' )
this._.nextNode = currentNode;
}
closeRange = 1;
}
else
{
// If we have child nodes, let's check them.
if ( currentNode.getFirst() )
{
// If we don't have a range yet, let's start it.
if ( !range )
{
range = new CKEDITOR.dom.range( this.range.document );
range.setStartAt( currentNode, CKEDITOR.POSITION_BEFORE_START );
}
currentNode = currentNode.getFirst();
continue;
}
includeNode = 1;
}
}
else if ( currentNode.type == CKEDITOR.NODE_TEXT )
{
// Ignore normal whitespaces (i.e. not including or
// other unicode whitespaces) before/after a block node.
if ( beginWhitespaceRegex.test( currentNode.getText() ) )
includeNode = 0;
}
// The current node is good to be part of the range and we are
// starting a new range, initialize it first.
if ( includeNode && !range )
{
range = new CKEDITOR.dom.range( this.range.document );
range.setStartAt( currentNode, CKEDITOR.POSITION_BEFORE_START );
}
// The last node has been found.
isLast = ( ( !closeRange || includeNode ) && currentNode.equals( lastNode ) );
// If we are in an element boundary, let's check if it is time
// to close the range, otherwise we include the parent within it.
if ( range && !closeRange )
{
while ( !currentNode.getNext( skipGuard ) && !isLast )
{
var parentNode = currentNode.getParent();
if ( parentNode.isBlockBoundary( this.forceBrBreak
&& !parentPre && { br : 1 } ) )
{
closeRange = 1;
includeNode = 0;
isLast = isLast || ( parentNode.equals( lastNode) );
// Make sure range includes bookmarks at the end of the block. (#7359)
range.setEndAt( parentNode, CKEDITOR.POSITION_BEFORE_END );
break;
}
currentNode = parentNode;
includeNode = 1;
isLast = ( currentNode.equals( lastNode ) );
continueFromSibling = 1;
}
}
// Now finally include the node.
if ( includeNode )
range.setEndAt( currentNode, CKEDITOR.POSITION_AFTER_END );
currentNode = getNextSourceNode ( currentNode, continueFromSibling, lastNode );
isLast = !currentNode;
// We have found a block boundary. Let's close the range and move out of the
// loop.
if ( isLast || ( closeRange && range ) )
break;
}
// Now, based on the processed range, look for (or create) the block to be returned.
if ( !block )
{
// If no range has been found, this is the end.
if ( !range )
{
this._.docEndMarker && this._.docEndMarker.remove();
this._.nextNode = null;
return null;
}
var startPath = new CKEDITOR.dom.elementPath( range.startContainer );
var startBlockLimit = startPath.blockLimit,
checkLimits = { div : 1, th : 1, td : 1 };
block = startPath.block;
if ( !block
&& !this.enforceRealBlocks
&& checkLimits[ startBlockLimit.getName() ]
&& range.checkStartOfBlock()
&& range.checkEndOfBlock() )
block = startBlockLimit;
else if ( !block || ( this.enforceRealBlocks && block.getName() == 'li' ) )
{
// Create the fixed block.
block = this.range.document.createElement( blockTag || 'p' );
// Move the contents of the temporary range to the fixed block.
range.extractContents().appendTo( block );
block.trim();
// Insert the fixed block into the DOM.
range.insertNode( block );
removePreviousBr = removeLastBr = true;
}
else if ( block.getName() != 'li' )
{
// If the range doesn't includes the entire contents of the
// block, we must split it, isolating the range in a dedicated
// block.
if ( !range.checkStartOfBlock() || !range.checkEndOfBlock() )
{
// The resulting block will be a clone of the current one.
block = block.clone( false );
// Extract the range contents, moving it to the new block.
range.extractContents().appendTo( block );
block.trim();
// Split the block. At this point, the range will be in the
// right position for our intents.
var splitInfo = range.splitBlock();
removePreviousBr = !splitInfo.wasStartOfBlock;
removeLastBr = !splitInfo.wasEndOfBlock;
// Insert the new block into the DOM.
range.insertNode( block );
}
}
else if ( !isLast )
{
// LIs are returned as is, with all their children (due to the
// nested lists). But, the next node is the node right after
// the current range, which could be an <li> child (nested
// lists) or the next sibling <li>.
this._.nextNode = ( block.equals( lastNode ) ? null : getNextSourceNode( range.getBoundaryNodes().endNode, 1, lastNode ) );
}
}
if ( removePreviousBr )
{
var previousSibling = block.getPrevious();
if ( previousSibling && previousSibling.type == CKEDITOR.NODE_ELEMENT )
{
if ( previousSibling.getName() == 'br' )
previousSibling.remove();
else if ( previousSibling.getLast() && previousSibling.getLast().$.nodeName.toLowerCase() == 'br' )
previousSibling.getLast().remove();
}
}
if ( removeLastBr )
{
var lastChild = block.getLast();
if ( lastChild && lastChild.type == CKEDITOR.NODE_ELEMENT && lastChild.getName() == 'br' )
{
// Take care not to remove the block expanding <br> in non-IE browsers.
if ( CKEDITOR.env.ie
|| lastChild.getPrevious( bookmarkGuard )
|| lastChild.getNext( bookmarkGuard ) )
lastChild.remove();
}
}
// Get a reference for the next element. This is important because the
// above block can be removed or changed, so we can rely on it for the
// next interation.
if ( !this._.nextNode )
{
this._.nextNode = ( isLast || block.equals( lastNode ) || !lastNode ) ? null :
getNextSourceNode( block, 1, lastNode );
}
return block;
}
};
CKEDITOR.dom.range.prototype.createIterator = function()
{
return new iterator( this );
};
})();
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