diff -r 000000000000 -r 6474c204b198 dom/webidl/UIEvent.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/UIEvent.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,47 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface please see
+ * http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface WindowProxy;
+
+[Constructor(DOMString type, optional UIEventInit eventInitDict)]
+interface UIEvent : Event
+{
+  readonly attribute WindowProxy? view;
+  readonly attribute long         detail;
+  void initUIEvent(DOMString aType,
+                   boolean aCanBubble,
+                   boolean aCancelable,
+                   WindowProxy? aView,
+                   long aDetail);
+};
+
+// Additional DOM0 properties.
+partial interface UIEvent {
+  const long SCROLL_PAGE_UP = -32768;
+  const long SCROLL_PAGE_DOWN = 32768;
+
+  readonly attribute long          layerX;
+  readonly attribute long          layerY;
+  readonly attribute long          pageX;
+  readonly attribute long          pageY;
+  readonly attribute unsigned long which;
+  readonly attribute Node?         rangeParent;
+  readonly attribute long          rangeOffset;
+           attribute boolean       cancelBubble;
+  readonly attribute boolean       isChar;
+};
+
+dictionary UIEventInit : EventInit
+{
+  WindowProxy? view = null;
+  long         detail = 0;
+};