Implement elementsFromPoint

Source/core/page/TouchDisambiguation.cpp

 /*
  * Copyright (C) 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 77 matching lines @@
 
 void findGoodTouchTargets(const IntRect& touchBox, LocalFrame* mainFrame, Vector<IntRect>& goodTargets, WillBeHeapVector<RawPtrWillBeMember<Node>>& highlightNodes)
 {
     goodTargets.clear();
 
     int touchPointPadding = ceil(std::max(touchBox.width(), touchBox.height()) * 0.5);
 
     IntPoint touchPoint = touchBox.center();
     IntPoint contentsPoint = mainFrame->view()->windowToContents(touchPoint);
 
-    HitTestResult result = mainFrame->eventHandler().hitTestResultAtPoint(contentsPoint, HitTestRequest::ReadOnly | HitTestRequest::Active, LayoutSize(touchPointPadding, touchPointPadding));
-    const WillBeHeapListHashSet<RefPtrWillBeMember<Node>>& hitResults = result.rectBasedTestResult();
+    HitTestResult result = mainFrame->eventHandler().hitTestResultAtPoint(contentsPoint, HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::ListBased, LayoutSize(touchPointPadding, touchPointPadding));
+    const WillBeHeapListHashSet<RefPtrWillBeMember<Node>>& hitResults = result.listBasedTestResult();
 
     // Blacklist nodes that are container of disambiguated nodes.
     // It is not uncommon to have a clickable <div> that contains other clickable objects.
     // This heuristic avoids excessive disambiguation in that case.
     WillBeHeapHashSet<RawPtrWillBeMember<Node>> blackList;
     for (const auto& hitResult : hitResults) {
         // Ignore any Nodes that can't be clicked on.
         LayoutObject* renderer = hitResult.get()->renderer();
         if (!renderer || !hitResult.get()->willRespondToMouseClickEvents())
             continue;
@@ skipping 30 matching lines @@
         // Currently the scoring function uses the overlap area with the fat point as the score.
         // We ignore the candidates that has less than 1/2 overlap (we consider not really ambiguous enough) than the best candidate to avoid excessive popups.
         if (touchTarget.value.score < bestScore * 0.5)
             continue;
         goodTargets.append(touchTarget.value.windowBoundingBox);
         highlightNodes.append(touchTarget.key);
     }
 }
 
 } // namespace blink