diff -r 000000000000 -r 6474c204b198 dom/interfaces/xul/nsIDOMXULCommandEvent.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/interfaces/xul/nsIDOMXULCommandEvent.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,46 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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/. */
+
+/**
+ * This interface is supported by command events, which are dispatched to
+ * XUL elements as a result of mouse or keyboard activation.
+ */
+
+#include "nsIDOMUIEvent.idl"
+
+[scriptable, builtinclass, uuid(2d5b6e19-74bb-40af-9aac-59a1e53e3fcc)]
+interface nsIDOMXULCommandEvent : nsIDOMUIEvent
+{
+  /**
+   * Command events support the same set of modifier keys as mouse and key
+   * events.
+   */
+  readonly attribute boolean ctrlKey;
+  readonly attribute boolean shiftKey;
+  readonly attribute boolean altKey;
+  readonly attribute boolean metaKey;
+
+  /**
+   * If the command event was redispatched because of a command= attribute
+   * on the original target, sourceEvent will be set to the original DOM Event.
+   * Otherwise, sourceEvent is null.
+   */
+  readonly attribute nsIDOMEvent sourceEvent;
+
+  /**
+   * Creates a new command event with the given attributes.
+   */
+  void initCommandEvent(in DOMString typeArg,
+                        in boolean canBubbleArg,
+                        in boolean cancelableArg,
+                        in nsIDOMWindow viewArg,
+                        in long detailArg,
+                        in boolean ctrlKeyArg,
+                        in boolean altKeyArg,
+                        in boolean shiftKeyArg,
+                        in boolean metaKeyArg,
+                        in nsIDOMEvent sourceEvent);
+};