[Mac] Implement basic hit testing in the scrolling tree
[WebKit-https.git] / Source / WebCore / page / scrolling / ScrollingTreeFrameHostingNode.cpp
1 /*
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25
26 #include "config.h"
27 #include "ScrollingTreeFrameHostingNode.h"
28
29 #if ENABLE(ASYNC_SCROLLING)
30
31 #include "Logging.h"
32 #include "ScrollingStateFrameHostingNode.h"
33 #include "ScrollingStateTree.h"
34 #include "ScrollingTree.h"
35 #include <wtf/text/TextStream.h>
36
37 namespace WebCore {
38
39 Ref<ScrollingTreeFrameHostingNode> ScrollingTreeFrameHostingNode::create(ScrollingTree& scrollingTree, ScrollingNodeID nodeID)
40 {
41     return adoptRef(*new ScrollingTreeFrameHostingNode(scrollingTree, nodeID));
42 }
43
44 ScrollingTreeFrameHostingNode::ScrollingTreeFrameHostingNode(ScrollingTree& scrollingTree, ScrollingNodeID nodeID)
45     : ScrollingTreeNode(scrollingTree, ScrollingNodeType::FrameHosting, nodeID)
46 {
47     ASSERT(isFrameHostingNode());
48 }
49
50 ScrollingTreeFrameHostingNode::~ScrollingTreeFrameHostingNode() = default;
51
52 void ScrollingTreeFrameHostingNode::commitStateBeforeChildren(const ScrollingStateNode& stateNode)
53 {
54     const ScrollingStateFrameHostingNode& frameHostingStateNode = downcast<ScrollingStateFrameHostingNode>(stateNode);
55
56     if (frameHostingStateNode.hasChangedProperty(ScrollingStateFrameHostingNode::ParentRelativeScrollableRect))
57         m_parentRelativeScrollableRect = frameHostingStateNode.parentRelativeScrollableRect();
58 }
59
60 void ScrollingTreeFrameHostingNode::updateLayersAfterAncestorChange(const ScrollingTreeNode& changedNode, const FloatRect& fixedPositionRect, const FloatSize& cumulativeDelta)
61 {
62     if (!m_children)
63         return;
64
65     for (auto& child : *m_children)
66         child->updateLayersAfterAncestorChange(changedNode, fixedPositionRect, cumulativeDelta);
67 }
68
69 LayoutPoint ScrollingTreeFrameHostingNode::parentToLocalPoint(LayoutPoint point) const
70 {
71     return point - toLayoutSize(parentRelativeScrollableRect().location());
72 }
73
74 void ScrollingTreeFrameHostingNode::dumpProperties(TextStream& ts, ScrollingStateTreeAsTextBehavior behavior) const
75 {
76     ts << "frame hosting node";
77     ScrollingTreeNode::dumpProperties(ts, behavior);
78
79     if (!m_parentRelativeScrollableRect.isEmpty())
80         ts.dumpProperty("parent relative scrollable rect", m_parentRelativeScrollableRect);
81 }
82
83 } // namespace WebCore
84
85 #endif // ENABLE(ASYNC_SCROLLING)