Implement elementsFromPoint

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 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.
@@ skipping 1343 matching lines @@
     LocalFrame* frame = document->frame();
     FrameView* frameView = document->view();
     RenderView* renderView = document->renderView();
 
     if (!renderView)
         return nullptr;
 
     float zoomFactor = frame->pageZoomFactor();
     LayoutPoint point = roundedLayoutPoint(FloatPoint(centerX * zoomFactor + frameView->scrollX(), centerY * zoomFactor + frameView->scrollY()));
 
-    HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly | HitTestRequest::Active;
+    HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::ListBased;
     if (ignoreClipping)
         hitType |= HitTestRequest::IgnoreClipping;
     if (allowChildFrameContent)
         hitType |= HitTestRequest::AllowChildFrameContent;
 
     HitTestRequest request(hitType);
 
     // When ignoreClipping is false, this method returns null for coordinates outside of the viewport.
     if (!request.ignoreClipping() && !frameView->visibleContentRect().intersects(HitTestLocation::rectForPoint(point, topPadding, rightPadding, bottomPadding, leftPadding)))
         return nullptr;
 
     WillBeHeapVector<RefPtrWillBeMember<Node> > matches;
-
-    // Need padding to trigger a rect based hit test, but we want to return a NodeList
-    // so we special case this.
-    if (!topPadding && !rightPadding && !bottomPadding && !leftPadding) {
-        HitTestResult result(point);
-        renderView->hitTest(request, result);
-
-        if (Node* innerNode = result.innerNode()) {
-            if (innerNode->isInShadowTree())
-                innerNode = innerNode->shadowHost();
-            matches.append(innerNode);
-        }
-    } else {
-        HitTestResult result(point, topPadding, rightPadding, bottomPadding, leftPadding);
-        renderView->hitTest(request, result);
-        copyToVector(result.rectBasedTestResult(), matches);
-    }
+    HitTestResult result(point, topPadding, rightPadding, bottomPadding, leftPadding);
+    renderView->hitTest(request, result);
+    copyToVector(result.listBasedTestResult(), matches);
 
     return StaticNodeList::adopt(matches);
 }
 
 bool Internals::hasSpellingMarker(Document* document, int from, int length)
 {
     ASSERT(document);
     if (!document->frame())
         return 0;
 
@@ skipping 953 matching lines @@
 {
     ThreadState::current()->scheduleGC();
 }
 
 ValueIterable<int>::IterationSource* Internals::startIteration(ScriptState*, ExceptionState&)
 {
     return new InternalsIterationSource();
 }
 
 } // namespace blink