/*
 * Copyright (C) 2010, 2014 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. ``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
 * 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 DisplayRefreshMonitorClient_h
#define DisplayRefreshMonitorClient_h

#if USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)

#include "PlatformScreen.h"
#include <wtf/Optional.h>

namespace WebCore {

class DisplayRefreshMonitor;
class DisplayRefreshMonitorManager;

class DisplayRefreshMonitorClient {
public:
    DisplayRefreshMonitorClient();
    virtual ~DisplayRefreshMonitorClient();

    // Always called on the main thread.
    virtual void displayRefreshFired(double timestamp) = 0;

    virtual RefPtr<DisplayRefreshMonitor> createDisplayRefreshMonitor(PlatformDisplayID) const = 0;

    PlatformDisplayID displayID() const { return m_displayID; }
    bool hasDisplayID() const { return m_displayIDIsSet; }
    void setDisplayID(PlatformDisplayID displayID)
    {
        m_displayID = displayID;
        m_displayIDIsSet = true;
    }

    void setIsScheduled(bool isScheduled) { m_scheduled = isScheduled; }
    bool isScheduled() const { return m_scheduled; }

    void fireDisplayRefreshIfNeeded(double timestamp);

private:
    bool m_scheduled;
    bool m_displayIDIsSet;
    PlatformDisplayID m_displayID;
};

}

#endif // USE(REQUEST_ANIMATION_FRAME_DISPLAY_MONITOR)

#endif