40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* interface for rendering objects whose state is saved in
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* session-history (back-forward navigation)
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*/
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#ifndef _nsIStatefulFrame_h
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#define _nsIStatefulFrame_h
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#include "nsContentUtils.h"
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#include "nsQueryFrame.h"
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class nsPresState;
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class nsIStatefulFrame
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{
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public:
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NS_DECL_QUERYFRAME_TARGET(nsIStatefulFrame)
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// Save the state for this frame. If this method succeeds, the caller is
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// responsible for deleting the resulting state when done with it.
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NS_IMETHOD SaveState(nsPresState** aState) = 0;
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// Restore the state for this frame from aState
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NS_IMETHOD RestoreState(nsPresState* aState) = 0;
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// Generate a key for this stateful frame
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NS_IMETHOD GenerateStateKey(nsIContent* aContent,
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nsIDocument* aDocument,
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nsACString& aKey)
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{
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return nsContentUtils::GenerateStateKey(aContent, aDocument, aKey);
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};
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};
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#endif /* _nsIStatefulFrame_h */
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