111 lines
4.4 KiB
C++
111 lines
4.4 KiB
C++
/*
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* Copyright (C) 2012 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(ASYNC_SCROLLING)
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#include "IntRect.h"
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#include "ScrollTypes.h"
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#include "ScrollingCoordinator.h"
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#include "ScrollingStateNode.h"
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#include <wtf/RefCounted.h>
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#include <wtf/TypeCasts.h>
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namespace WebCore {
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class ScrollingStateFixedNode;
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class ScrollingTree;
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class ScrollingTreeFrameScrollingNode;
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class ScrollingTreeScrollingNode;
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class ScrollingTreeNode : public ThreadSafeRefCounted<ScrollingTreeNode> {
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WTF_MAKE_FAST_ALLOCATED;
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friend class ScrollingTree;
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public:
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virtual ~ScrollingTreeNode();
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ScrollingNodeType nodeType() const { return m_nodeType; }
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ScrollingNodeID scrollingNodeID() const { return m_nodeID; }
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bool isFixedNode() const { return nodeType() == ScrollingNodeType::Fixed; }
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bool isStickyNode() const { return nodeType() == ScrollingNodeType::Sticky; }
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bool isPositionedNode() const { return nodeType() == ScrollingNodeType::Positioned; }
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bool isScrollingNode() const { return isFrameScrollingNode() || isOverflowScrollingNode(); }
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bool isFrameScrollingNode() const { return nodeType() == ScrollingNodeType::MainFrame || nodeType() == ScrollingNodeType::Subframe; }
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bool isFrameHostingNode() const { return nodeType() == ScrollingNodeType::FrameHosting; }
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bool isOverflowScrollingNode() const { return nodeType() == ScrollingNodeType::Overflow; }
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bool isOverflowScrollProxyNode() const { return nodeType() == ScrollingNodeType::OverflowProxy; }
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virtual void commitStateBeforeChildren(const ScrollingStateNode&) = 0;
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virtual void commitStateAfterChildren(const ScrollingStateNode&) { }
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virtual void didCompleteCommitForNode() { }
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virtual void willBeDestroyed() { }
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ScrollingTreeNode* parent() const { return m_parent; }
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void setParent(ScrollingTreeNode* parent) { m_parent = parent; }
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WEBCORE_EXPORT bool isRootNode() const;
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const Vector<Ref<ScrollingTreeNode>>& children() const { return m_children; }
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void appendChild(Ref<ScrollingTreeNode>&&);
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void removeChild(ScrollingTreeNode&);
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void removeAllChildren();
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WEBCORE_EXPORT ScrollingTreeFrameScrollingNode* enclosingFrameNodeIncludingSelf();
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WEBCORE_EXPORT ScrollingTreeScrollingNode* enclosingScrollingNodeIncludingSelf();
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WEBCORE_EXPORT void dump(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const;
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protected:
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ScrollingTreeNode(ScrollingTree&, ScrollingNodeType, ScrollingNodeID);
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ScrollingTree& scrollingTree() const { return m_scrollingTree; }
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virtual void applyLayerPositions() = 0;
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WEBCORE_EXPORT virtual void dumpProperties(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const;
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Vector<Ref<ScrollingTreeNode>> m_children;
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private:
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ScrollingTree& m_scrollingTree;
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const ScrollingNodeType m_nodeType;
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const ScrollingNodeID m_nodeID;
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ScrollingTreeNode* m_parent { nullptr };
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};
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} // namespace WebCore
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#define SPECIALIZE_TYPE_TRAITS_SCROLLING_NODE(ToValueTypeName, predicate) \
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SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ToValueTypeName) \
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static bool isType(const WebCore::ScrollingTreeNode& node) { return node.predicate; } \
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SPECIALIZE_TYPE_TRAITS_END()
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#endif // ENABLE(ASYNC_SCROLLING)
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