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 /**
 * Provides skin related utlility methods.
 *
 * @module widget
 * @submodule widget-skin
 */
 var BOUNDING_BOX = "boundingBox",
 CONTENT_BOX = "contentBox",
 SKIN = "skin",
 _getClassName = Y.ClassNameManager.getClassName;
 
 /**
 * Returns the name of the skin that's currently applied to the widget.
 *
 * Searches up the Widget's ancestor axis for, by default, a class
 * yui3-skin-(name), and returns the (name) portion. Otherwise, returns null.
 *
 * This is only really useful after the widget's DOM structure is in the
 * document, either by render or by progressive enhancement.
 *
 * @method getSkinName
 * @for Widget
 * @param {String} [skinPrefix] The prefix which the implementation uses for the skin
 * ("yui3-skin-" is the default).
 *
 * NOTE: skinPrefix will be used as part of a regular expression:
 *
 * new RegExp('\\b' + skinPrefix + '(\\S+)')
 *
 * Although an unlikely use case, literal characters which may result in an invalid
 * regular expression should be escaped.
 *
 * @return {String} The name of the skin, or null, if a matching skin class is not found.
 */
 
 Y.Widget.prototype.getSkinName = function (skinPrefix) {
 
 var root = this.get( CONTENT_BOX ) || this.get( BOUNDING_BOX ),
 match,
 search;
 
 skinPrefix = skinPrefix || _getClassName(SKIN, "");
 
 search = new RegExp( '\\b' + skinPrefix + '(\\S+)' );
 
 if ( root ) {
 root.ancestor( function ( node ) {
 match = node.get( 'className' ).match( search );
 return match;
 } );
 }
 
 return ( match ) ? match[1] : null;
 };