Core: Added asynchronous focus. Fixed #3559 - :focusable, :tabbable, …

…setFocus().

tests/unit/core/core.js

@@ -25,4 +25,27 @@ test("attr - aria", function() {
 	equals(el.attr('aria-expanded'), 'false', 'aria expanded is false');
 });
 
+test('focus', function() {
+	expect(3);
+
+	var el = $('#inputTabindex0'),
+		// used to remove focus from the main element
+		other = $('#inputTabindex10');
+
+	// test original functionality
+	el.focus(function() {
+		ok(true, 'event triggered');
+	});
+	el.focus();
+	other.focus();
+
+	// trigger event handler + callback
+	stop();
+	el.focus(500, function() {
+		start();
+		ok(true, 'callback triggered');
+	});
+	other.focus();
+});
+
 })(jQuery);

ui/ui.core.js

@@ -135,6 +135,19 @@ if (isFF2) {
 
 //jQuery plugins
 $.fn.extend({
+	_focus: $.fn.focus,
+	focus: function(delay, fn) {
+		return typeof delay === 'number'
+			? this.each(function() {
+				var elem = this;
+				setTimeout(function() {
+					$(elem).focus();
+					(fn && fn.call(elem));
+				}, delay);
+			})
+			: this._focus.apply(this, arguments);
+	},
+
 	remove: function() {
 		// Safari has a native remove event which actually removes DOM elements,
 		// so we have to use triggerHandler instead of trigger (#3037).