diff -r 000000000000 -r 6474c204b198 dom/webidl/Gamepad.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/Gamepad.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,49 @@
+/* -*- 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/. */
+
+[Pref="dom.gamepad.enabled"]
+interface GamepadButton {
+  readonly    attribute boolean pressed;
+  readonly    attribute double  value;
+};
+
+[Pref="dom.gamepad.enabled"]
+interface Gamepad {
+  /**
+   * An identifier, unique per type of device.
+   */
+  readonly attribute DOMString id;
+
+  /**
+   * The game port index for the device. Unique per device
+   * attached to this system.
+   */
+  readonly attribute unsigned long index;
+
+  /**
+   * The mapping in use for this device. The empty string
+   * indicates that no mapping is in use.
+   */
+  readonly attribute DOMString mapping;
+
+  /**
+   * true if this gamepad is currently connected to the system.
+   */
+  readonly attribute boolean connected;
+
+  /**
+   * The current state of all buttons on the device, an
+   * array of GamepadButton.
+   */
+  [Pure, Cached, Frozen]
+  readonly attribute sequence<GamepadButton> buttons;
+
+  /**
+   * The current position of all axes on the device, an
+   * array of doubles.
+   */
+  [Pure, Cached, Frozen]
+  readonly attribute sequence<double> axes;
+};