/*

 * Copyright (C) 2010 Apple 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 INC. OR ITS CONTRIBUTORS

 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

 * THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef ResponsivenessTimer_h

#define ResponsivenessTimer_h

#include "RunLoop.h"

namespace WebKit {

class ResponsivenessTimer {

public:

    class Client {

    public:

        virtual ~Client() { }

        virtual void didBecomeUnresponsive(ResponsivenessTimer*) = 0;

        virtual void didBecomeResponsive(ResponsivenessTimer*) = 0;

    };

    ResponsivenessTimer(ResponsivenessTimer::Client*);

    ~ResponsivenessTimer();

    void start();

    void stop();

    void invalidate();

    bool isResponsive() { return m_isResponsive; }

private:

    void timerFired();

    ResponsivenessTimer::Client* m_client;

    bool m_isResponsive;

    RunLoop::Timer<ResponsivenessTimer> m_timer;

};

} // namespace WebKit

#endif // ResponsivenessTimer_h