/**
* 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),
el = args[2];
config.overrides = config.overrides || {};
config.overrides.type = args[0];
if (el) {
if (Y.DOM.isWindow(el)) {
config.capture = false;
}
else {
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;
})();