1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/generic/nsIStatefulFrame.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,30 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +/*
1.9 + * interface for rendering objects whose state is saved in
1.10 + * session-history (back-forward navigation)
1.11 + */
1.12 +
1.13 +#ifndef _nsIStatefulFrame_h
1.14 +#define _nsIStatefulFrame_h
1.15 +
1.16 +#include "nsQueryFrame.h"
1.17 +
1.18 +class nsPresState;
1.19 +
1.20 +class nsIStatefulFrame
1.21 +{
1.22 + public:
1.23 + NS_DECL_QUERYFRAME_TARGET(nsIStatefulFrame)
1.24 +
1.25 + // Save the state for this frame. If this method succeeds, the caller is
1.26 + // responsible for deleting the resulting state when done with it.
1.27 + NS_IMETHOD SaveState(nsPresState** aState) = 0;
1.28 +
1.29 + // Restore the state for this frame from aState
1.30 + NS_IMETHOD RestoreState(nsPresState* aState) = 0;
1.31 +};
1.32 +
1.33 +#endif /* _nsIStatefulFrame_h */
