Make jQuery().off(event) work for delegated events.

Logic to handle detaching by event was in both .off() and jQuery.event.remove; now it's only in .off(). It's a bit of a strange case since the event object (not the jQuery set) specifies the element.

src/event.js

@@ -166,13 +166,6 @@ jQuery.event = {
 			return;
 		}
 
-		// For removal, types can be an Event object
-		if ( types && types.type && types.handler ) {
-			handler = types.handler;
-			types = types.type;
-			selector = types.selector;
-		}
-
 		// Once for each type.namespace in types; type may be omitted
 		types = (types || "").replace( rhoverHack, "mouseover$1 mouseout$1" ).split(" ");
 		for ( t = 0; t < types.length; t++ ) {
@@ -919,7 +912,8 @@ jQuery.fn.extend({
 		if ( one === 1 ) {
 			origFn = fn;
 			fn = function( event ) {
-				jQuery.event.remove( event.currentTarget || this, event );
+				// Can use an empty set, since event contains the info
+				jQuery().off( event );
 				return origFn.apply( this, arguments );
 			};
 			// Use same guid so caller can remove using origFn
@@ -933,9 +927,15 @@ jQuery.fn.extend({
 		return this.on.call( this, types, selector, data, fn, 1 );
 	},
 	off: function( types, selector, fn ) {
-		if ( types && types.preventDefault ) {
-			// ( event )  native or jQuery.Event
-			return this.off( types.type, types.handler, types.selector );
+		if ( types && types.preventDefault && types.handleObj ) {
+			// ( event )  dispatched jQuery.Event
+			var handleObj = types.handleObj;
+			jQuery( types.currentTarget ).off( 
+				handleObj.namespace? handleObj.type + "." + handleObj.namespace : handleObj.type, 
+				handleObj.selector, 
+				handleObj.handler
+			);
+			return this;
 		}
 		if ( typeof types === "object" ) {
 			// ( types-object [, selector] )

test/unit/event.js

@@ -2054,6 +2054,20 @@ test(".delegate()/.undelegate()", function() {
 	jQuery("#body").undelegate("#nothiddendiv div", "click");
 });
 
+test("jQuery.off using dispatched jQuery.Event", function() {
+	expect(1);
+	
+	var markup = jQuery( '<p><a href="#">target</a></p>' ),
+		count = 0;
+	markup
+		.on( "click.name", "a", function( event ) {
+			equals( ++count, 1, "event called once before removal" );
+			jQuery().off( event );
+		})
+		.find( "a" ).click().click().end()
+		.remove();
+});
+
 test("stopPropagation() stops directly-bound events on delegated target", function() {
 	expect(1);