diff -r 000000000000 -r 6474c204b198 dom/interfaces/events/nsIDOMUIEvent.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/interfaces/events/nsIDOMUIEvent.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,41 @@
+/* -*- 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/. */
+
+#include "nsIDOMEvent.idl"
+
+/**
+ * The nsIDOMUIEvent interface is the datatype for all UI events in the
+ * Document Object Model.
+ *
+ * For more information on this interface please see
+ * http://www.w3.org/TR/DOM-Level-2-Events/
+ */
+
+[scriptable, builtinclass, uuid(d73852f8-7bd6-477d-8233-117dbf83860b)]
+interface nsIDOMUIEvent : nsIDOMEvent
+{
+  readonly attribute nsIDOMWindow       view;
+  readonly attribute long               detail;
+  void                      initUIEvent(in DOMString typeArg,
+                                        in boolean canBubbleArg,
+                                        in boolean cancelableArg,
+                                        in nsIDOMWindow viewArg,
+                                        in long detailArg);
+
+  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 nsIDOMNode         rangeParent;
+  readonly attribute long               rangeOffset;
+
+           attribute boolean            cancelBubble;
+
+  readonly attribute boolean            isChar;
+};