/*

Copyright (c) 2009, Yahoo! Inc. All rights reserved.

Code licensed under the BSD License:

http://developer.yahoo.net/yui/license.txt

version: 3.0.0

build: 1549

*/

YUI.add('event-focus', function(Y) {

/**

 * Adds focus and blur event listener support.  These events normally

 * do not bubble, so this adds support for that so these events

 * can be used in event delegation scenarios.

 * 

 * @module event

 * @submodule event-focus

 */

(function() {

var UA = Y.UA,

	Event = Y.Event,

	plugins = Y.Env.evt.plugins,

	ie = UA.ie,

	bUseMutation = (UA.opera || UA.webkit),

	eventNames = {

		focus: (ie ? 'focusin' : (bUseMutation ? 'DOMFocusIn' : 'focus')),

		blur: (ie ? 'focusout' : (bUseMutation ? 'DOMFocusOut' : 'blur'))

	},

	//	Only need to use capture phase for Gecko since it doesn't support 

	//	focusin, focusout, DOMFocusIn, or DOMFocusOut

    CAPTURE_CONFIG = { capture: (UA.gecko ? true : false) },

	attach = function (args, config) {

	    var a = Y.Array(args, 0, true);

		a[0] = eventNames[a[0]];

	    return Event._attach(a, config);

	},

	eventAdapter = {

		on: function () {

			return attach(arguments, CAPTURE_CONFIG);

		}

	};

Event._attachFocus = attach;

Event._attachBlur = attach;

/**

 * Adds a DOM focus listener.  Uses the focusin event in IE, 

 * DOMFocusIn for Opera and Webkit, and the capture phase for Gecko so that

 * the event propagates in a way that enables event delegation.

 *

 * @for YUI

 * @event focus

 * @param type {string} 'focus'

 * @param fn {function} the callback function to execute

 * @param o {string|HTMLElement|collection} the element(s) to bind

 * @param context optional context object

 * @param args 0..n additional arguments to provide to the listener.

 * @return {EventHandle} the detach handle

 */

plugins.focus = eventAdapter;

/**

 * Adds a DOM blur listener.  Uses the focusout event in IE, 

 * DOMFocusOut for Opera and Webkit, and the capture phase for Gecko so that

 * the event propagates in a way that enables event delegation.

 *

 * @for YUI

 * @event blur

 * @param type {string} 'blur'

 * @param fn {function} the callback function to execute

 * @param o {string|HTMLElement|collection} the element(s) to bind

 * @param context optional context object

 * @param args 0..n additional arguments to provide to the listener.

 * @return {EventHandle} the detach handle

 */

plugins.blur = eventAdapter;

})();

}, '3.0.0' ,{requires:['node-base']});