Source/WebCore/platform/mac/ScrollAnimatorMac.h

/*
 * Copyright (C) 2010, 2011, 2014-2015 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.
 */

#pragma once

#if PLATFORM(MAC)

#include "FloatPoint.h"
#include "FloatSize.h"
#include "ScrollAnimator.h"
#include <wtf/RetainPtr.h>

namespace WebCore {

class Scrollbar;

class ScrollAnimatorMac final : public ScrollAnimator {
public:
    ScrollAnimatorMac(ScrollableArea&);
    virtual ~ScrollAnimatorMac();

private:
    bool shouldForwardWheelEventsToParent(const PlatformWheelEvent&) const;
    bool handleWheelEvent(const PlatformWheelEvent&) final;

    bool platformAllowsScrollAnimation() const;

    void handleWheelEventPhase(PlatformWheelEventPhase) final;

    bool isRubberBandInProgress() const final;

    bool processWheelEventForScrollSnap(const PlatformWheelEvent&) final;

    // ScrollingEffectsControllerClient.
    bool allowsHorizontalStretching(const PlatformWheelEvent&) const final;
    bool allowsVerticalStretching(const PlatformWheelEvent&) const final;
    bool shouldRubberBandOnSide(BoxSide) const final;
};

} // namespace WebCore

#endif // PLATFORM(MAC)