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336cad5a55
Differential Revision: https://phabricator.services.mozilla.com/D32258 --HG-- extra : moz-landing-system : lando
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* 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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namespace mozilla {
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class PresState;
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} // namespace mozilla
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class nsIStatefulFrame {
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public:
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NS_DECL_QUERYFRAME_TARGET(nsIStatefulFrame)
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// Save the state for this frame.
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virtual mozilla::UniquePtr<mozilla::PresState> SaveState() = 0;
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// Restore the state for this frame from aState
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NS_IMETHOD RestoreState(mozilla::PresState* aState) = 0;
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// Generate a key for this stateful frame
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virtual void GenerateStateKey(nsIContent* aContent,
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mozilla::dom::Document* aDocument,
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nsACString& aKey) {
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nsContentUtils::GenerateStateKey(aContent, aDocument, aKey);
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};
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};
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#endif /* _nsIStatefulFrame_h */
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