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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "nsContentUtils.h"
#include "nsQueryFrame.h"
namespace mozilla {
class PresState;
} // namespace mozilla
class nsIStatefulFrame {
public:
NS_DECL_QUERYFRAME_TARGET(nsIStatefulFrame)
// Save the state for this frame.
virtual mozilla::UniquePtr<mozilla::PresState> SaveState() = 0;
// Restore the state for this frame from aState
NS_IMETHOD RestoreState(mozilla::PresState* aState) = 0;
// Generate a key for this stateful frame
virtual void GenerateStateKey(nsIContent* aContent,
mozilla::dom::Document* aDocument,
nsACString& aKey) {
nsContentUtils::GenerateStateKey(aContent, aDocument, aKey);
};
};
#endif /* _nsIStatefulFrame_h */