/* * 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 * 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) #include "ScrollingStateNode.h" namespace WebCore { class ScrollingStateOverflowScrollProxyNode : public ScrollingStateNode { public: static Ref<ScrollingStateOverflowScrollProxyNode> create(ScrollingStateTree&, ScrollingNodeID); Ref<ScrollingStateNode> clone(ScrollingStateTree&) override; virtual ~ScrollingStateOverflowScrollProxyNode(); enum { OverflowScrollingNode = NumStateNodeBits }; // This is the node we get our scroll position from. ScrollingNodeID overflowScrollingNode() const { return m_overflowScrollingNodeID; } WEBCORE_EXPORT void setOverflowScrollingNode(ScrollingNodeID); void dumpProperties(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const override; private: ScrollingStateOverflowScrollProxyNode(ScrollingStateTree&, ScrollingNodeID); ScrollingStateOverflowScrollProxyNode(const ScrollingStateOverflowScrollProxyNode&, ScrollingStateTree&); void setPropertyChangedBitsAfterReattach() override; ScrollingNodeID m_overflowScrollingNodeID { 0 }; }; } // namespace WebCore SPECIALIZE_TYPE_TRAITS_SCROLLING_STATE_NODE(ScrollingStateOverflowScrollProxyNode, isOverflowScrollProxyNode()) #endif // ENABLE(ASYNC_SCROLLING)