ScrollingTreeNode.h [plain text]
#pragma once
#if ENABLE(ASYNC_SCROLLING)
#include "IntRect.h"
#include "ScrollTypes.h"
#include "ScrollingCoordinator.h"
#include "ScrollingStateNode.h"
#include <wtf/RefCounted.h>
#include <wtf/TypeCasts.h>
namespace WebCore {
class ScrollingStateFixedNode;
class ScrollingStateScrollingNode;
class ScrollingTreeFrameScrollingNode;
class ScrollingTreeNode : public RefCounted<ScrollingTreeNode> {
public:
virtual ~ScrollingTreeNode();
ScrollingNodeType nodeType() const { return m_nodeType; }
ScrollingNodeID scrollingNodeID() const { return m_nodeID; }
bool isFixedNode() const { return nodeType() == FixedNode; }
bool isStickyNode() const { return nodeType() == StickyNode; }
bool isScrollingNode() const { return isFrameScrollingNode() || isOverflowScrollingNode(); }
bool isFrameScrollingNode() const { return nodeType() == MainFrameScrollingNode || nodeType() == SubframeScrollingNode; }
bool isOverflowScrollingNode() const { return nodeType() == OverflowScrollingNode; }
virtual void commitStateBeforeChildren(const ScrollingStateNode&) = 0;
virtual void commitStateAfterChildren(const ScrollingStateNode&) { }
virtual void updateLayersAfterAncestorChange(const ScrollingTreeNode& changedNode, const FloatRect& fixedPositionRect, const FloatSize& cumulativeDelta) = 0;
ScrollingTreeNode* parent() const { return m_parent; }
void setParent(ScrollingTreeNode* parent) { m_parent = parent; }
Vector<RefPtr<ScrollingTreeNode>>* children() { return m_children.get(); }
void appendChild(Ref<ScrollingTreeNode>&&);
void removeChild(ScrollingTreeNode&);
WEBCORE_EXPORT ScrollingTreeFrameScrollingNode* enclosingFrameNodeIncludingSelf();
WEBCORE_EXPORT void dump(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const;
protected:
ScrollingTreeNode(ScrollingTree&, ScrollingNodeType, ScrollingNodeID);
ScrollingTree& scrollingTree() const { return m_scrollingTree; }
std::unique_ptr<Vector<RefPtr<ScrollingTreeNode>>> m_children;
WEBCORE_EXPORT virtual void dumpProperties(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const;
private:
ScrollingTree& m_scrollingTree;
const ScrollingNodeType m_nodeType;
const ScrollingNodeID m_nodeID;
ScrollingTreeNode* m_parent;
};
}
#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)