Change hover element to HTML element when over root scrollbar

third_party/WebKit/Source/web/tests/WebFrameTest.cpp

 /*
  * Copyright (C) 2010 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 11266 matching lines @@
   web_view->UpdateAllLifecyclePhases();
 
   Document* document = web_view->MainFrameImpl()->GetFrame()->GetDocument();
   Element* a_tag = document->getElementById("a");
 
   // Ensure hittest only has scrollbar.
   HitTestResult hit_test_result =
       web_view->CoreHitTestResultAt(WebPoint(18, a_tag->OffsetTop()));
 
   EXPECT_FALSE(hit_test_result.URLElement());
-  EXPECT_FALSE(hit_test_result.InnerElement());
+  EXPECT_TRUE(hit_test_result.InnerElement());
   EXPECT_TRUE(hit_test_result.GetScrollbar());
   EXPECT_FALSE(hit_test_result.GetScrollbar()->IsCustomScrollbar());
 
   // Mouse over link. Mouse cursor should be hand.
   WebMouseEvent mouse_move_over_link_event(
       WebInputEvent::kMouseMove,
       WebFloatPoint(a_tag->OffsetLeft(), a_tag->OffsetTop()),
       WebFloatPoint(a_tag->OffsetLeft(), a_tag->OffsetTop()),
       WebPointerProperties::Button::kNoButton, 0, WebInputEvent::kNoModifiers,
       TimeTicks::Now().InSeconds());
@@ skipping 24 matching lines @@
 
   WebMouseEvent mouse_press_event(
       WebInputEvent::kMouseDown, WebFloatPoint(18, a_tag->OffsetTop()),
       WebFloatPoint(18, a_tag->OffsetTop()),
       WebPointerProperties::Button::kLeft, 0,
       WebInputEvent::Modifiers::kLeftButtonDown, TimeTicks::Now().InSeconds());
   mouse_press_event.SetFrameScale(1);
   document->GetFrame()->GetEventHandler().HandleMousePressEvent(
       mouse_press_event);
 
-  EXPECT_FALSE(document->ActiveHoverElement());
-  EXPECT_FALSE(document->HoverElement());
+  EXPECT_TRUE(document->ActiveHoverElement());
+  EXPECT_TRUE(document->HoverElement());
 
   WebMouseEvent mouse_release_event(
       WebInputEvent::kMouseUp, WebFloatPoint(18, a_tag->OffsetTop()),
       WebFloatPoint(18, a_tag->OffsetTop()),
       WebPointerProperties::Button::kLeft, 0,
       WebInputEvent::Modifiers::kLeftButtonDown, TimeTicks::Now().InSeconds());
   mouse_release_event.SetFrameScale(1);
   document->GetFrame()->GetEventHandler().HandleMouseReleaseEvent(
       mouse_release_event);
 
@@ skipping 115 matching lines @@
       TimeTicks::Now().InSeconds());
   mouse_move_over_i_frame.SetFrameScale(1);
   document->GetFrame()->GetEventHandler().HandleMouseMoveEvent(
       mouse_move_over_i_frame, Vector<WebMouseEvent>());
 
   // IFRAME hover.
   EXPECT_EQ(document->HoverElement(), iframe);
 
   // Ensure hittest has scrollbar.
   hit_test_result = web_view->CoreHitTestResultAt(WebPoint(195, 5));
-  EXPECT_FALSE(hit_test_result.InnerElement());
+  EXPECT_TRUE(hit_test_result.InnerElement());
   EXPECT_TRUE(hit_test_result.GetScrollbar());
   EXPECT_TRUE(hit_test_result.GetScrollbar()->Enabled());
 
   // Mouse over scrollbar.
   WebMouseEvent mouse_move_over_i_frame_and_scrollbar(
       WebInputEvent::kMouseMove, WebFloatPoint(195, 5), WebFloatPoint(195, 5),
       WebPointerProperties::Button::kNoButton, 0, WebInputEvent::kNoModifiers,
       TimeTicks::Now().InSeconds());
   mouse_move_over_i_frame_and_scrollbar.SetFrameScale(1);
   document->GetFrame()->GetEventHandler().HandleMouseMoveEvent(
@@ skipping 103 matching lines @@
   EXPECT_LT(hit_test_result.InnerElement()->clientWidth(), 180);
 
   // Mouse over disabled scrollbar.
   document->GetFrame()->GetEventHandler().HandleMouseMoveEvent(
       mouse_move_over_div_and_scrollbar, Vector<WebMouseEvent>());
 
   // Not change the DIV :hover.
   EXPECT_EQ(document->HoverElement(), parent_div);
 }
 
+// Makes sure that mouse over a root scrollbar also hover the html element.
+TEST_F(WebFrameTest, MouseOverRootScrollbar) {
+  RegisterMockedHttpURLLoad("hover-root-scrollbar.html");
+  FrameTestHelpers::WebViewHelper web_view_helper;
+  WebViewBase* web_view = web_view_helper.InitializeAndLoad(
+      base_url_ + "hover-root-scrollbar.html");
+
+  web_view_helper.Resize(WebSize(200, 200));
+
+  web_view->UpdateAllLifecyclePhases();
+
+  Document* document =
+      ToLocalFrame(web_view->GetPage()->MainFrame())->GetDocument();
+
+  // Ensure hittest has HTML element and scrollbar.
+  HitTestResult hit_test_result =
+      web_view->CoreHitTestResultAt(WebPoint(195, 5));
+
+  EXPECT_TRUE(hit_test_result.InnerElement());
+  EXPECT_EQ(hit_test_result.InnerElement(), document->documentElement());
+  EXPECT_TRUE(hit_test_result.GetScrollbar());
+
+  // Mouse over scrollbar.
+  WebMouseEvent mouse_move_over_div_and_scrollbar(
+      WebInputEvent::kMouseMove, WebFloatPoint(195, 5), WebFloatPoint(195, 5),
+      WebPointerProperties::Button::kNoButton, 0, WebInputEvent::kNoModifiers,
+      TimeTicks::Now().InSeconds());
+  mouse_move_over_div_and_scrollbar.SetFrameScale(1);
+  document->GetFrame()->GetEventHandler().HandleMouseMoveEvent(
+      mouse_move_over_div_and_scrollbar, Vector<WebMouseEvent>());
+
+  // Hover HTML element.
+  EXPECT_EQ(document->HoverElement(), document->documentElement());
+}
+
 TEST_F(WebFrameTest, MouseReleaseUpdatesScrollbarHoveredPart) {
   RegisterMockedHttpURLLoad("custom-scrollbar-hover.html");
   FrameTestHelpers::WebViewHelper web_view_helper;
   WebViewBase* web_view = web_view_helper.InitializeAndLoad(
       base_url_ + "custom-scrollbar-hover.html");
 
   web_view_helper.Resize(WebSize(200, 200));
 
   web_view->UpdateAllLifecyclePhases();
 
@@ skipping 582 matching lines @@
     if (obj->IsText()) {
       LayoutText* layout_text = ToLayoutText(obj);
       text = layout_text->GetText();
       break;
     }
   }
   EXPECT_EQ("foo alt", text.Utf8());
 }
 
 }  // namespace blink