/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Google, Inc. nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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*/
#ifndef FrameLoaderStateMachine_h
#define FrameLoaderStateMachine_h
#include "wtf/Noncopyable.h"
namespace WebCore {
// Encapsulates a state machine for FrameLoader. Note that this is different from FrameState,
// which stores the state of the current load that FrameLoader is executing.
class FrameLoaderStateMachine {
WTF_MAKE_NONCOPYABLE(FrameLoaderStateMachine);
public:
FrameLoaderStateMachine();
// Once a load has been committed, the state may
// alternate between CommittedFirstRealLoad and FirstLayoutDone.
// Otherwise, the states only go down the list.
enum State {
CreatingInitialEmptyDocument,
DisplayingInitialEmptyDocument,
StartedFirstRealLoad,
CommittedFirstRealLoad,
CommittedMultipleRealLoads
};
bool startedFirstRealLoad() const;
bool committedFirstRealDocumentLoad() const;
bool creatingInitialEmptyDocument() const;
bool isDisplayingInitialEmptyDocument() const;
bool committedMultipleRealLoads() const;
void advanceTo(State);
private:
State m_state;
};
} // namespace WebCore
#endif // FrameLoaderStateMachine_h