Autocomplete: Fix list traversal bug. Fixes #7269 - autocomplete: holding down arrow keys in Firefox does not traverse list

Use keypress event for listening for arrow keys because Firefox
and Opera do not repeat keydown events for these keys.

Author: treyhunner

ui/jquery.ui.autocomplete.js

@@ -53,24 +53,29 @@ $.widget( "ui.autocomplete", {
 			})
 			.bind( "keydown.autocomplete", function( event ) {
 				if ( self.options.disabled || self.element.attr( "readonly" ) ) {
+                    suppressKeyPress = true;
 					return;
 				}
 
 				suppressKeyPress = false;
 				var keyCode = $.ui.keyCode;
 				switch( event.keyCode ) {
 				case keyCode.PAGE_UP:
+                    suppressKeyPress = true;
 					self._move( "previousPage", event );
 					break;
 				case keyCode.PAGE_DOWN:
+                    suppressKeyPress = true;
 					self._move( "nextPage", event );
 					break;
 				case keyCode.UP:
+                    suppressKeyPress = true;
 					self._move( "previous", event );
 					// prevent moving cursor to beginning of text field in some browsers
 					event.preventDefault();
 					break;
 				case keyCode.DOWN:
+                    suppressKeyPress = true;
 					self._move( "next", event );
 					// prevent moving cursor to end of text field in some browsers
 					event.preventDefault();
@@ -112,7 +117,28 @@ $.widget( "ui.autocomplete", {
 				if ( suppressKeyPress ) {
 					suppressKeyPress = false;
 					event.preventDefault();
+                    return;
 				}
+
+				var keyCode = $.ui.keyCode;
+				switch( event.keyCode ) {
+				case keyCode.PAGE_UP:
+					self._move( "previousPage", event );
+					break;
+				case keyCode.PAGE_DOWN:
+					self._move( "nextPage", event );
+					break;
+				case keyCode.UP:
+					self._move( "previous", event );
+					// prevent moving cursor to beginning of text field in some browsers
+					event.preventDefault();
+					break;
+				case keyCode.DOWN:
+					self._move( "next", event );
+					// prevent moving cursor to end of text field in some browsers
+					event.preventDefault();
+					break;
+                }
 			})
 			.bind( "focus.autocomplete", function() {
 				if ( self.options.disabled ) {