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/*
* Copyright (C) 2012 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 "IntRect.h"
#include "ScrollTypes.h"
#include "ScrollingCoordinator.h"
#include "ScrollingStateNode.h"
#include <wtf/RefCounted.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/ThreadSafeWeakPtr.h>
#include <wtf/TypeCasts.h>
namespace WebCore {
class ScrollingStateFixedNode;
class ScrollingTree;
class ScrollingTreeFrameScrollingNode;
class ScrollingTreeScrollingNode;
class ScrollingTreeNode : public ThreadSafeRefCountedAndCanMakeThreadSafeWeakPtr<ScrollingTreeNode> {
WTF_MAKE_TZONE_ALLOCATED_EXPORT(ScrollingTreeNode, WEBCORE_EXPORT);
friend class ScrollingTree;
public:
virtual ~ScrollingTreeNode();
ScrollingNodeType nodeType() const { return m_nodeType; }
ScrollingNodeID scrollingNodeID() const { return m_nodeID; }
bool isFixedNode() const { return nodeType() == ScrollingNodeType::Fixed; }
bool isStickyNode() const { return nodeType() == ScrollingNodeType::Sticky; }
bool isPositionedNode() const { return nodeType() == ScrollingNodeType::Positioned; }
#if PLATFORM(COCOA)
bool isFixedNodeCocoa() const { return isFixedNode(); }
bool isPositionedNodeCocoa() const { return isPositionedNode(); }
bool isOverflowScrollProxyNodeCocoa() const { return isOverflowScrollProxyNode(); }
#endif
#if USE(COORDINATED_GRAPHICS)
bool isFixedNodeCoordinated() const { return isFixedNode(); }
bool isPositionedNodeCoordinated() const { return isPositionedNode(); }
bool isOverflowScrollProxyNodeCoordinated() const { return isOverflowScrollProxyNode(); }
#endif
bool isScrollingNode() const { return isFrameScrollingNode() || isOverflowScrollingNode() || isPluginScrollingNode(); }
bool isFrameScrollingNode() const { return nodeType() == ScrollingNodeType::MainFrame || nodeType() == ScrollingNodeType::Subframe; }
bool isFrameHostingNode() const { return nodeType() == ScrollingNodeType::FrameHosting; }
bool isPluginScrollingNode() const { return nodeType() == ScrollingNodeType::PluginScrolling; }
bool isPluginHostingNode() const { return nodeType() == ScrollingNodeType::PluginHosting; }
bool isOverflowScrollingNode() const { return nodeType() == ScrollingNodeType::Overflow; }
bool isOverflowScrollProxyNode() const { return nodeType() == ScrollingNodeType::OverflowProxy; }
virtual bool commitStateBeforeChildren(const ScrollingStateNode&) = 0;
virtual bool commitStateAfterChildren(const ScrollingStateNode&) { return true; }
virtual void didCompleteCommitForNode() { }
virtual void willBeDestroyed() { }
RefPtr<ScrollingTreeNode> parent() const { return m_parent.get(); }
void setParent(RefPtr<ScrollingTreeNode>&& parent) { m_parent = parent; }
WEBCORE_EXPORT bool isRootNode() const;
const Vector<Ref<ScrollingTreeNode>>& children() const { return m_children; }
void appendChild(Ref<ScrollingTreeNode>&&);
void removeChild(ScrollingTreeNode&);
void removeAllChildren();
virtual bool isRootOfHostedSubtree() const { return false; }
WEBCORE_EXPORT RefPtr<ScrollingTreeFrameScrollingNode> enclosingFrameNodeIncludingSelf();
WEBCORE_EXPORT RefPtr<ScrollingTreeScrollingNode> enclosingScrollingNodeIncludingSelf();
WEBCORE_EXPORT void dump(WTF::TextStream&, OptionSet<ScrollingStateTreeAsTextBehavior>) const;
FrameIdentifier frameIdentifier() const { return *m_parentFrameIdentifier; }
void setFrameIdentifier(FrameIdentifier frameID) { m_parentFrameIdentifier = frameID; }
protected:
ScrollingTreeNode(ScrollingTree&, ScrollingNodeType, ScrollingNodeID);
RefPtr<ScrollingTree> scrollingTree() const { return m_scrollingTree.get(); }
virtual void applyLayerPositions() = 0;
WEBCORE_EXPORT virtual void dumpProperties(WTF::TextStream&, OptionSet<ScrollingStateTreeAsTextBehavior>) const;
Vector<Ref<ScrollingTreeNode>> m_children;
private:
ThreadSafeWeakPtr<ScrollingTree> m_scrollingTree;
const ScrollingNodeType m_nodeType;
const ScrollingNodeID m_nodeID;
Markable<FrameIdentifier> m_parentFrameIdentifier;
ThreadSafeWeakPtr<ScrollingTreeNode> m_parent;
};
} // namespace WebCore
#define SPECIALIZE_TYPE_TRAITS_SCROLLING_NODE(ToValueTypeName, predicate) \
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ToValueTypeName) \
static bool isType(const WebCore::ScrollingTreeNode& node) { return node.predicate; } \
SPECIALIZE_TYPE_TRAITS_END()
#endif // ENABLE(ASYNC_SCROLLING)
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