Source/WebCore/page/scrolling/nicosia/ScrollingTreePositionedNode.h

/*
 * Copyright (C) 2012 Apple Inc. All rights reserved.
 * Copyright (C) 2019 Igalia S.L.
 *
 * 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 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 THE COPYRIGHT
 * HOLDER 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
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 */

#pragma once

#if ENABLE(ASYNC_SCROLLING) && USE(NICOSIA)

#include "ScrollingConstraints.h"
#include "ScrollingTreeNode.h"
#include <wtf/RefPtr.h>

namespace Nicosia {
class CompositionLayer;
}

namespace WebCore {

class ScrollingTreePositionedNode final : public ScrollingTreeNode {
public:
    static Ref<ScrollingTreePositionedNode> create(ScrollingTree&, ScrollingNodeID);
    virtual ~ScrollingTreePositionedNode();

    const Vector<ScrollingNodeID>& relatedOverflowScrollingNodes() const { return m_relatedOverflowScrollingNodes; }

private:
    ScrollingTreePositionedNode(ScrollingTree&, ScrollingNodeID);

    void commitStateBeforeChildren(const ScrollingStateNode&) override;
    void applyLayerPositions() override;

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

    Vector<ScrollingNodeID> m_relatedOverflowScrollingNodes;
    AbsolutePositionConstraints m_constraints;
    RefPtr<Nicosia::CompositionLayer> m_layer;
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_SCROLLING_NODE(ScrollingTreePositionedNode, isPositionedNode())

#endif // ENABLE(ASYNC_SCROLLING) && USE(NICOSIA)