Autocomplete: Handle clicks outside the autocomplete after scrolling …

…the results (which causes the body to gain focus). Fixes #5903 - Autocomplete doesn't close after scrolling.

ui/jquery.ui.autocomplete.js

@@ -119,7 +119,24 @@ $.widget( "ui.autocomplete", {
 			.addClass( "ui-autocomplete" )
 			.appendTo( $( this.options.appendTo || "body", doc )[0] )
 			// prevent the close-on-blur in case of a "slow" click on the menu (long mousedown)
-			.mousedown(function() {
+			.mousedown(function( event ) {
+				// clicking on the scrollbar causes focus to shift to the body
+				// but we can't detect a mouseup or a click immediately afterward
+				// so we have to track the next mousedown and close the menu if
+				// the user clicks somewhere outside of the autocomplete
+				var menuElement = self.menu.element[ 0 ];
+				if ( event.target === menuElement ) {
+					setTimeout(function() {
+						$( document ).one( 'mousedown', function( event ) {
+							if ( event.target !== self.element[ 0 ] &&
+								event.target !== menuElement &&
+								!$.ui.contains( menuElement, event.target ) ) {
+								self.close();
+							}
+						});
+					}, 1 );
+				}
+
 				// use another timeout to make sure the blur-event-handler on the input was already triggered
 				setTimeout(function() {
 					clearTimeout( self.closing );