layout/generic/nsIStatefulFrame.h
author Jim Blandy <jimb@mozilla.com>
Mon, 11 Aug 2014 12:46:39 -0700
changeset 198889 a65c5d0c752db9db704f8d95d3743fc112e584b3
parent 113345 3493741d8e8df82bc46a6b074ff277003cf40d61
child 288717 f47a76e5ddbec811a740893eefb803c29028474a
permissions -rw-r--r--
Bug 1003302: Implement ubi::Node::compartment. r=terrence

/* 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/. */

/*
 * interface for rendering objects whose state is saved in
 * session-history (back-forward navigation)
 */

#ifndef _nsIStatefulFrame_h
#define _nsIStatefulFrame_h

#include "nsQueryFrame.h"

class nsPresState;

class nsIStatefulFrame
{
 public: 
  NS_DECL_QUERYFRAME_TARGET(nsIStatefulFrame)

  // Save the state for this frame.  If this method succeeds, the caller is
  // responsible for deleting the resulting state when done with it.
  NS_IMETHOD SaveState(nsPresState** aState) = 0;

  // Restore the state for this frame from aState
  NS_IMETHOD RestoreState(nsPresState* aState) = 0;
};

#endif /* _nsIStatefulFrame_h */