(function() {
+
+var adapt = Y.Env.evt.plugins,
+ CAPTURE_CONFIG = { capture: true },
+ NOOP = function(){},
+
+ // Opera implents capture phase events per spec rather than
+ // the more useful way it is implemented in other browsers:
+ // The event doesn't fire on a target unless there is a
+ // listener on an element in the target's ancestry. If a
+ // capture phase listener is added only to the element that
+ // will be the target of the event, the listener won't fire.
+ // To get around this, we register a NOOP listener on the
+ // element's parent.
+ _captureHack = function(type, o) {
+ var el = (Y.Lang.isString(o)) ? Y.Selector.query(o, null, true) : o,
+ p = el && el.parentNode;
+
+ if (p) {
+ Y.Event._attach([type, NOOP, p], CAPTURE_CONFIG);
+ }
+ };
+
+
+/**
+ * Adds a DOM focus listener. Uses the focusin event in IE,
+ * and the capture phase otherwise so that
+ * the event propagates in a way that enables event delegation.
+ *
+ * Note: if you are registering this event on the intended target
+ * rather than an ancestor, the element must be in the DOM in
+ * order for it to work in Opera.
+ *
+ * @for YUI
+ * @event focus
+ */
+adapt.focus = {
+ on: function(type, fn, o) {
+ var a = Y.Array(arguments, 0, true);
+ if (Y.UA.opera) {
+ _captureHack(type, o);
+ }
+ return Y.Event._attach(a, CAPTURE_CONFIG);
+ }
+};
+
+/**
+ * Adds a DOM blur listener. Uses the focusout event in IE,
+ * and the capture phase otherwise so that
+ * the event propagates in a way that enables event delegation.
+ *
+ * Note: if you are registering this event on the intended target
+ * rather than an ancestor, the element must be in the DOM
+ * at the time of registration in order for it to work in Opera.
+ *
+ * @for YUI
+ * @event blur
+ */
+adapt.blur = {
+ on: function(type, fn, o) {
+ var a = Y.Array(arguments, 0, true);
+ if (Y.UA.opera) {
+ _captureHack(type, o);
+ }
+ return Y.Event._attach(a, CAPTURE_CONFIG);
+ }
+
+};
+
+})();
+