/* * 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 * (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 ENABLE(ASYNC_SCROLLING) && USE(NICOSIA) #include "ScrollingConstraints.h" #include "ScrollingTreeNode.h" #include <wtf/RefPtr.h> namespace Nicosia { class CompositionLayer; } namespace WebCore { class ScrollingTreeStickyNode final : public ScrollingTreeNode { public: static Ref<ScrollingTreeStickyNode> create(ScrollingTree&, ScrollingNodeID); virtual ~ScrollingTreeStickyNode(); private: ScrollingTreeStickyNode(ScrollingTree&, ScrollingNodeID); void commitStateBeforeChildren(const ScrollingStateNode&) override; void applyLayerPositions() override; void dumpProperties(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const override; FloatPoint computeLayerPosition() const; StickyPositionViewportConstraints m_constraints; RefPtr<Nicosia::CompositionLayer> m_layer; }; } // namespace WebCore SPECIALIZE_TYPE_TRAITS_SCROLLING_NODE(ScrollingTreeStickyNode, isStickyNode()) #endif // ENABLE(ASYNC_SCROLLING) && USE(NICOSIA)