Source/WebCore/page/scrolling/ScrollingStateFrameHostingNode.h

/*
 * Copyright (C) 2019 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
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#if ENABLE(ASYNC_SCROLLING)

#include "ScrollingStateNode.h"

namespace WebCore {

class Scrollbar;

class ScrollingStateFrameHostingNode final : public ScrollingStateNode {
public:
    WEBCORE_EXPORT static Ref<ScrollingStateFrameHostingNode> create(ScrollingStateTree&, ScrollingNodeID);
    Ref<ScrollingStateNode> clone(ScrollingStateTree&) override;

    virtual ~ScrollingStateFrameHostingNode();

    enum ChangedProperty {
        ParentRelativeScrollableRect = NumStateNodeBits
    };

    const LayoutRect& parentRelativeScrollableRect() const { return m_parentRelativeScrollableRect; }
    WEBCORE_EXPORT void setParentRelativeScrollableRect(const LayoutRect&);

    void dumpProperties(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const override;

private:
    ScrollingStateFrameHostingNode(ScrollingStateTree&, ScrollingNodeID);
    ScrollingStateFrameHostingNode(const ScrollingStateFrameHostingNode&, ScrollingStateTree&);

    void setPropertyChangedBitsAfterReattach() override;

    LayoutRect m_parentRelativeScrollableRect;
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_SCROLLING_STATE_NODE(ScrollingStateFrameHostingNode, isFrameHostingNode())

#endif // ENABLE(ASYNC_SCROLLING)