The Tor Browser / file revision

 /* -*- 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/.

  *

  * The origin of this IDL file is

  * http://dvcs.w3.org/hg/undomanager/raw-file/tip/undomanager.html

  *

  * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C

  * liability, trademark and document use rules apply.

  */

 [Pref="dom.undo_manager.enabled"]

 interface UndoManager {

   [Throws] void transact(DOMTransaction transaction, boolean merge);

   [Throws] void undo();

   [Throws] void redo();

   [Throws] sequence<DOMTransaction>? item(unsigned long index);

   [Throws] readonly attribute unsigned long length;

   [Throws] readonly attribute unsigned long position;

   [Throws] void clearUndo();

   [Throws] void clearRedo();

 };