Your IP : 10.1.73.149
/*
Copyright (c) 2003-2010, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/
(function()
{
// This function is to be called under a "walker" instance scope.
function iterate( rtl, breakOnFalse )
{
// Return null if we have reached the end.
if ( this._.end )
return null;
var node,
range = this.range,
guard,
userGuard = this.guard,
type = this.type,
getSourceNodeFn = ( rtl ? 'getPreviousSourceNode' : 'getNextSourceNode' );
// This is the first call. Initialize it.
if ( !this._.start )
{
this._.start = 1;
// Trim text nodes and optmize the range boundaries. DOM changes
// may happen at this point.
range.trim();
// A collapsed range must return null at first call.
if ( range.collapsed )
{
this.end();
return null;
}
}
// Create the LTR guard function, if necessary.
if ( !rtl && !this._.guardLTR )
{
// Gets the node that stops the walker when going LTR.
var limitLTR = range.endContainer,
blockerLTR = limitLTR.getChild( range.endOffset );
this._.guardLTR = function( node, movingOut )
{
return ( ( !movingOut || !limitLTR.equals( node ) )
&& ( !blockerLTR || !node.equals( blockerLTR ) )
&& ( node.type != CKEDITOR.NODE_ELEMENT || !movingOut || node.getName() != 'body' ) );
};
}
// Create the RTL guard function, if necessary.
if ( rtl && !this._.guardRTL )
{
// Gets the node that stops the walker when going LTR.
var limitRTL = range.startContainer,
blockerRTL = ( range.startOffset > 0 ) && limitRTL.getChild( range.startOffset - 1 );
this._.guardRTL = function( node, movingOut )
{
return ( ( !movingOut || !limitRTL.equals( node ) )
&& ( !blockerRTL || !node.equals( blockerRTL ) )
&& ( node.type != CKEDITOR.NODE_ELEMENT || !movingOut || node.getName() != 'body' ) );
};
}
// Define which guard function to use.
var stopGuard = rtl ? this._.guardRTL : this._.guardLTR;
// Make the user defined guard function participate in the process,
// otherwise simply use the boundary guard.
if ( userGuard )
{
guard = function( node, movingOut )
{
if ( stopGuard( node, movingOut ) === false )
return false;
return userGuard( node, movingOut );
};
}
else
guard = stopGuard;
if ( this.current )
node = this.current[ getSourceNodeFn ]( false, type, guard );
else
{
// Get the first node to be returned.
if ( rtl )
{
node = range.endContainer;
if ( range.endOffset > 0 )
{
node = node.getChild( range.endOffset - 1 );
if ( guard( node ) === false )
node = null;
}
else
node = ( guard ( node, true ) === false ) ?
null : node.getPreviousSourceNode( true, type, guard );
}
else
{
node = range.startContainer;
node = node.getChild( range.startOffset );
if ( node )
{
if ( guard( node ) === false )
node = null;
}
else
node = ( guard ( range.startContainer, true ) === false ) ?
null : range.startContainer.getNextSourceNode( true, type, guard ) ;
}
}
while ( node && !this._.end )
{
this.current = node;
if ( !this.evaluator || this.evaluator( node ) !== false )
{
if ( !breakOnFalse )
return node;
}
else if ( breakOnFalse && this.evaluator )
return false;
node = node[ getSourceNodeFn ]( false, type, guard );
}
this.end();
return this.current = null;
}
function iterateToLast( rtl )
{
var node, last = null;
while ( ( node = iterate.call( this, rtl ) ) )
last = node;
return last;
}
CKEDITOR.dom.walker = CKEDITOR.tools.createClass(
{
/**
* Utility class to "walk" the DOM inside a range boundaries. If
* necessary, partially included nodes (text nodes) are broken to
* reflect the boundaries limits, so DOM and range changes may happen.
* Outside changes to the range may break the walker.
*
* The walker may return nodes that are not totaly included into the
* range boundaires. Let's take the following range representation,
* where the square brackets indicate the boundaries:
*
* [<p>Some <b>sample] text</b>
*
* While walking forward into the above range, the following nodes are
* returned: <p>, "Some ", <b> and "sample". Going
* backwards instead we have: "sample" and "Some ". So note that the
* walker always returns nodes when "entering" them, but not when
* "leaving" them. The guard function is instead called both when
* entering and leaving nodes.
*
* @constructor
* @param {CKEDITOR.dom.range} range The range within which walk.
*/
$ : function( range )
{
this.range = range;
/**
* A function executed for every matched node, to check whether
* it's to be considered into the walk or not. If not provided, all
* matched nodes are considered good.
* If the function returns "false" the node is ignored.
* @name CKEDITOR.dom.walker.prototype.evaluator
* @property
* @type Function
*/
// this.evaluator = null;
/**
* A function executed for every node the walk pass by to check
* whether the walk is to be finished. It's called when both
* entering and exiting nodes, as well as for the matched nodes.
* If this function returns "false", the walking ends and no more
* nodes are evaluated.
* @name CKEDITOR.dom.walker.prototype.guard
* @property
* @type Function
*/
// this.guard = null;
/** @private */
this._ = {};
},
// statics :
// {
// /* Creates a CKEDITOR.dom.walker instance to walk inside DOM boundaries set by nodes.
// * @param {CKEDITOR.dom.node} startNode The node from wich the walk
// * will start.
// * @param {CKEDITOR.dom.node} [endNode] The last node to be considered
// * in the walk. No more nodes are retrieved after touching or
// * passing it. If not provided, the walker stops at the
// * <body> closing boundary.
// * @returns {CKEDITOR.dom.walker} A DOM walker for the nodes between the
// * provided nodes.
// */
// createOnNodes : function( startNode, endNode, startInclusive, endInclusive )
// {
// var range = new CKEDITOR.dom.range();
// if ( startNode )
// range.setStartAt( startNode, startInclusive ? CKEDITOR.POSITION_BEFORE_START : CKEDITOR.POSITION_AFTER_END ) ;
// else
// range.setStartAt( startNode.getDocument().getBody(), CKEDITOR.POSITION_AFTER_START ) ;
//
// if ( endNode )
// range.setEndAt( endNode, endInclusive ? CKEDITOR.POSITION_AFTER_END : CKEDITOR.POSITION_BEFORE_START ) ;
// else
// range.setEndAt( startNode.getDocument().getBody(), CKEDITOR.POSITION_BEFORE_END ) ;
//
// return new CKEDITOR.dom.walker( range );
// }
// },
//
proto :
{
/**
* Stop walking. No more nodes are retrieved if this function gets
* called.
*/
end : function()
{
this._.end = 1;
},
/**
* Retrieves the next node (at right).
* @returns {CKEDITOR.dom.node} The next node or null if no more
* nodes are available.
*/
next : function()
{
return iterate.call( this );
},
/**
* Retrieves the previous node (at left).
* @returns {CKEDITOR.dom.node} The previous node or null if no more
* nodes are available.
*/
previous : function()
{
return iterate.call( this, true );
},
/**
* Check all nodes at right, executing the evaluation fuction.
* @returns {Boolean} "false" if the evaluator function returned
* "false" for any of the matched nodes. Otherwise "true".
*/
checkForward : function()
{
return iterate.call( this, false, true ) !== false;
},
/**
* Check all nodes at left, executing the evaluation fuction.
* @returns {Boolean} "false" if the evaluator function returned
* "false" for any of the matched nodes. Otherwise "true".
*/
checkBackward : function()
{
return iterate.call( this, true, true ) !== false;
},
/**
* Executes a full walk forward (to the right), until no more nodes
* are available, returning the last valid node.
* @returns {CKEDITOR.dom.node} The last node at the right or null
* if no valid nodes are available.
*/
lastForward : function()
{
return iterateToLast.call( this );
},
/**
* Executes a full walk backwards (to the left), until no more nodes
* are available, returning the last valid node.
* @returns {CKEDITOR.dom.node} The last node at the left or null
* if no valid nodes are available.
*/
lastBackward : function()
{
return iterateToLast.call( this, true );
},
reset : function()
{
delete this.current;
this._ = {};
}
}
});
/*
* Anything whose display computed style is block, list-item, table,
* table-row-group, table-header-group, table-footer-group, table-row,
* table-column-group, table-column, table-cell, table-caption, or whose node
* name is hr, br (when enterMode is br only) is a block boundary.
*/
var blockBoundaryDisplayMatch =
{
block : 1,
'list-item' : 1,
table : 1,
'table-row-group' : 1,
'table-header-group' : 1,
'table-footer-group' : 1,
'table-row' : 1,
'table-column-group' : 1,
'table-column' : 1,
'table-cell' : 1,
'table-caption' : 1
},
blockBoundaryNodeNameMatch = { hr : 1 };
CKEDITOR.dom.element.prototype.isBlockBoundary = function( customNodeNames )
{
var nodeNameMatches = CKEDITOR.tools.extend( {},
blockBoundaryNodeNameMatch, customNodeNames || {} );
return blockBoundaryDisplayMatch[ this.getComputedStyle( 'display' ) ] ||
nodeNameMatches[ this.getName() ];
};
CKEDITOR.dom.walker.blockBoundary = function( customNodeNames )
{
return function( node , type )
{
return ! ( node.type == CKEDITOR.NODE_ELEMENT
&& node.isBlockBoundary( customNodeNames ) );
};
};
CKEDITOR.dom.walker.listItemBoundary = function()
{
return this.blockBoundary( { br : 1 } );
};
/**
* Whether the node is a bookmark node's inner text node.
*/
CKEDITOR.dom.walker.bookmarkContents = function( node )
{
},
/**
* Whether the to-be-evaluated node is a bookmark node OR bookmark node
* inner contents.
* @param {Boolean} contentOnly Whether only test againt the text content of
* bookmark node instead of the element itself(default).
* @param {Boolean} isReject Whether should return 'false' for the bookmark
* node instead of 'true'(default).
*/
CKEDITOR.dom.walker.bookmark = function( contentOnly, isReject )
{
function isBookmarkNode( node )
{
return ( node && node.getName
&& node.getName() == 'span'
&& node.hasAttribute('_fck_bookmark') );
}
return function( node )
{
var isBookmark, parent;
// Is bookmark inner text node?
isBookmark = ( node && !node.getName && ( parent = node.getParent() )
&& isBookmarkNode( parent ) );
// Is bookmark node?
isBookmark = contentOnly ? isBookmark : isBookmark || isBookmarkNode( node );
return isReject ^ isBookmark;
};
};
/**
* Whether the node is a text node containing only whitespaces characters.
* @param isReject
*/
CKEDITOR.dom.walker.whitespaces = function( isReject )
{
return function( node )
{
var isWhitespace = node && ( node.type == CKEDITOR.NODE_TEXT )
&& !CKEDITOR.tools.trim( node.getText() );
return isReject ^ isWhitespace;
};
};
/**
* Whether the node is invisible in wysiwyg mode.
* @param isReject
*/
CKEDITOR.dom.walker.invisible = function( isReject )
{
var whitespace = CKEDITOR.dom.walker.whitespaces();
return function( node )
{
// Nodes that take no spaces in wysiwyg:
// 1. White-spaces but not including NBSP;
// 2. Empty inline elements, e.g. <b></b> we're checking here
// 'offsetHeight' instead of 'offsetWidth' for properly excluding
// all sorts of empty paragraph, e.g. <br />.
var isInvisible = whitespace( node ) || node.is && !node.$.offsetHeight;
return isReject ^ isInvisible;
};
};
var tailNbspRegex = /^[\t\r\n ]*(?: |\xa0)$/,
isNotWhitespaces = CKEDITOR.dom.walker.whitespaces( true ),
isNotBookmark = CKEDITOR.dom.walker.bookmark( false, true ),
fillerEvaluator = function( element )
{
return isNotBookmark( element ) && isNotWhitespaces( element );
};
// Check if there's a filler node at the end of an element, and return it.
CKEDITOR.dom.element.prototype.getBogus = function ()
{
var tail = this.getLast( fillerEvaluator );
if ( tail && ( !CKEDITOR.env.ie ? tail.is && tail.is( 'br' )
: tail.getText && tailNbspRegex.test( tail.getText() ) ) )
{
return tail;
}
return false;
};
})();
;
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