Widget: Modified _trigger to invoke callbacks with apply so that handlers are invoked the same way .trigger() invokes them. Fixes #6795 - Widget: _trigger passes array arguments to handlers inconsistently.

Author: Michael DellaNoce

tests/unit/widget/widget_tickets.js

@@ -40,4 +40,52 @@ test( "#5830 - Widget: Using inheritance overwrites the base classes options", f
 	delete $.ui.testWidgetExtension;
 });
 
+test( "#6795 - Widget: handle array arguments to _trigger consistently", function() {
+	expect( 4 );
+
+	$.widget( "ui.testWidget", {
+		_create: function() {},
+		testEvent: function() {
+			var ui = {
+					foo: "bar",
+					baz: {
+						qux: 5,
+						quux: 20
+					}
+				};
+			var extra = {
+				bar: 5
+			};
+			this._trigger( "foo", null, [ ui, extra ] );
+		}
+	});
+	$( "#widget" ).bind( "testwidgetfoo", function( event, ui, extra ) {
+		same( ui, {
+			foo: "bar",
+			baz: {
+				qux: 5,
+				quux: 20
+			}
+		}, "event: ui hash passed" );
+		same( extra, {
+			bar: 5
+		}, "event: extra argument passed" );
+	});
+	$( "#widget" ).testWidget({
+		foo: function( event, ui, extra ) {
+			same( ui, {
+				foo: "bar",
+				baz: {
+					qux: 5,
+					quux: 20
+				}
+			}, "callback: ui hash passed" );
+			same( extra, {
+				bar: 5
+			}, "callback: extra argument passed" );
+		}
+	})
+	.testWidget( "testEvent" );
+});
+
 }( jQuery ) );

ui/jquery.ui.widget.js

@@ -289,7 +289,8 @@ $.Widget.prototype = {
 	},
 
 	_trigger: function( type, event, data ) {
-		var callback = this.options[ type ];
+		var callback = this.options[ type ],
+			args;
 
 		event = $.Event( event );
 		event.type = ( type === this.widgetEventPrefix ?
@@ -309,8 +310,12 @@ $.Widget.prototype = {
 
 		this.element.trigger( event, data );
 
-		return !( $.isFunction(callback) &&
-			callback.call( this.element[0], event, data ) === false ||
+		args = $.isArray( data ) ?
+			[ event ].concat( data ) :
+			[ event, data ];
+
+		return !( $.isFunction( callback ) &&
+			callback.apply( this.element[0], args ) === false ||
 			event.isDefaultPrevented() );
 	}
 };