[WIP] Use the flat tree for hover handling.

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 10785 matching lines @@
   WebMouseEvent mouseMoveOverLinkEvent(
       WebInputEvent::MouseMove,
       WebFloatPoint(div1Tag->offsetLeft() + 5, div1Tag->offsetTop() + 5),
       WebFloatPoint(div1Tag->offsetLeft() + 5, div1Tag->offsetTop() + 5),
       WebPointerProperties::Button::NoButton, 0, WebInputEvent::NoModifiers,
       TimeTicks::Now().InSeconds());
   mouseMoveOverLinkEvent.setFrameScale(1);
   document->frame()->eventHandler().handleMouseMoveEvent(
       mouseMoveOverLinkEvent, Vector<WebMouseEvent>());
 
-  EXPECT_EQ(document->hoverNode(),
+  EXPECT_EQ(document->hoverElement(),
             document->frame()->chromeClient().lastSetTooltipNodeForTesting());
   EXPECT_EQ(div1Tag,
             document->frame()->chromeClient().lastSetTooltipNodeForTesting());
 
   Element* div2Tag = document->getElementById("div2");
 
   WebMouseEvent mouseMoveEvent(
       WebInputEvent::MouseMove,
       WebFloatPoint(div2Tag->offsetLeft() + 5, div2Tag->offsetTop() + 5),
       WebFloatPoint(div2Tag->offsetLeft() + 5, div2Tag->offsetTop() + 5),
       WebPointerProperties::Button::NoButton, 0, WebInputEvent::NoModifiers,
       TimeTicks::Now().InSeconds());
   mouseMoveEvent.setFrameScale(1);
   document->frame()->eventHandler().handleMouseMoveEvent(
       mouseMoveEvent, Vector<WebMouseEvent>());
 
-  EXPECT_EQ(document->hoverNode(),
+  EXPECT_EQ(document->hoverElement(),
             document->frame()->chromeClient().lastSetTooltipNodeForTesting());
   EXPECT_EQ(div2Tag,
             document->frame()->chromeClient().lastSetTooltipNodeForTesting());
 }
 
 // Makes sure that mouse hover over an overlay scrollbar doesn't activate
 // elements below(except the Element that owns the scrollbar) unless the
 // scrollbar is faded out.
 TEST_F(WebFrameTest, MouseOverLinkAndOverlayScrollbar) {
   FrameTestHelpers::WebViewHelper webViewHelper;
@@ skipping 57 matching lines @@
 
   WebMouseEvent mousePressEvent(
       WebInputEvent::MouseDown, WebFloatPoint(18, aTag->offsetTop()),
       WebFloatPoint(18, aTag->offsetTop()), WebPointerProperties::Button::Left,
       0, WebInputEvent::Modifiers::LeftButtonDown,
       TimeTicks::Now().InSeconds());
   mousePressEvent.setFrameScale(1);
   document->frame()->eventHandler().handleMousePressEvent(mousePressEvent);
 
   EXPECT_FALSE(document->activeHoverElement());
-  EXPECT_FALSE(document->hoverNode());
+  EXPECT_FALSE(document->hoverElement());
 
   WebMouseEvent mouseReleaseEvent(
       WebInputEvent::MouseUp, WebFloatPoint(18, aTag->offsetTop()),
       WebFloatPoint(18, aTag->offsetTop()), WebPointerProperties::Button::Left,
       0, WebInputEvent::Modifiers::LeftButtonDown,
       TimeTicks::Now().InSeconds());
   mouseReleaseEvent.setFrameScale(1);
   document->frame()->eventHandler().handleMouseReleaseEvent(mouseReleaseEvent);
 
   // Mouse over disabled overlay scrollbar. Mouse cursor should be hand and has
@@ skipping 10 matching lines @@
   document->frame()->eventHandler().handleMouseMoveEvent(
       mouseMoveEvent, Vector<WebMouseEvent>());
 
   EXPECT_EQ(
       Cursor::Type::Hand,
       document->frame()->chromeClient().lastSetCursorForTesting().getType());
 
   document->frame()->eventHandler().handleMousePressEvent(mousePressEvent);
 
   EXPECT_TRUE(document->activeHoverElement());
-  EXPECT_TRUE(document->hoverNode());
+  EXPECT_TRUE(document->hoverElement());
 
   document->frame()->eventHandler().handleMouseReleaseEvent(mouseReleaseEvent);
 }
 
 // Makes sure that mouse hover over an custom scrollbar doesn't change the
 // activate elements.
 TEST_F(WebFrameTest, MouseOverCustomScrollbar) {
   registerMockedHttpURLLoad("custom-scrollbar-hover.html");
   FrameTestHelpers::WebViewHelper webViewHelper;
   WebViewImpl* webView = webViewHelper.initializeAndLoad(
@@ skipping 17 matching lines @@
   // Mouse over DIV
   WebMouseEvent mouseMoveOverDiv(
       WebInputEvent::MouseMove, WebFloatPoint(1, 1), WebFloatPoint(1, 1),
       WebPointerProperties::Button::NoButton, 0, WebInputEvent::NoModifiers,
       TimeTicks::Now().InSeconds());
   mouseMoveOverDiv.setFrameScale(1);
   document->frame()->eventHandler().handleMouseMoveEvent(
       mouseMoveOverDiv, Vector<WebMouseEvent>());
 
   // DIV :hover
-  EXPECT_EQ(document->hoverNode(), scrollbarDiv);
+  EXPECT_EQ(document->hoverElement(), scrollbarDiv);
 
   // Ensure hittest has DIV and scrollbar
   hitTestResult = webView->coreHitTestResultAt(WebPoint(175, 1));
 
   EXPECT_TRUE(hitTestResult.innerElement());
   EXPECT_TRUE(hitTestResult.scrollbar());
   EXPECT_TRUE(hitTestResult.scrollbar()->isCustomScrollbar());
 
   // Mouse over scrollbar
   WebMouseEvent mouseMoveOverDivAndScrollbar(
       WebInputEvent::MouseMove, WebFloatPoint(175, 1), WebFloatPoint(175, 1),
       WebPointerProperties::Button::NoButton, 0, WebInputEvent::NoModifiers,
       TimeTicks::Now().InSeconds());
   mouseMoveOverDivAndScrollbar.setFrameScale(1);
   document->frame()->eventHandler().handleMouseMoveEvent(
       mouseMoveOverDivAndScrollbar, Vector<WebMouseEvent>());
 
   // Custom not change the DIV :hover
-  EXPECT_EQ(document->hoverNode(), scrollbarDiv);
+  EXPECT_EQ(document->hoverElement(), scrollbarDiv);
   EXPECT_EQ(hitTestResult.scrollbar()->hoveredPart(), ScrollbarPart::ThumbPart);
 }
 
 // Makes sure that mouse hover over a scrollbar also hover the element owns the
 // scrollbar.
 TEST_F(WebFrameTest, MouseOverScrollbarAndParentElement) {
   registerMockedHttpURLLoad("scrollbar-and-element-hover.html");
   FrameTestHelpers::WebViewHelper webViewHelper;
   RuntimeEnabledFeatures::setOverlayScrollbarsEnabled(false);
   WebViewImpl* webView = webViewHelper.initializeAndLoad(
@@ skipping 26 matching lines @@
   // Mouse over DIV.
   WebMouseEvent mouseMoveOverDiv(
       WebInputEvent::MouseMove, WebFloatPoint(1, 1), WebFloatPoint(1, 1),
       WebPointerProperties::Button::NoButton, 0, WebInputEvent::NoModifiers,
       TimeTicks::Now().InSeconds());
   mouseMoveOverDiv.setFrameScale(1);
   document->frame()->eventHandler().handleMouseMoveEvent(
       mouseMoveOverDiv, Vector<WebMouseEvent>());
 
   // DIV :hover.
-  EXPECT_EQ(document->hoverNode(), parentDiv);
+  EXPECT_EQ(document->hoverElement(), parentDiv);
 
   // Ensure hittest has DIV and scrollbar.
   hitTestResult = webView->coreHitTestResultAt(WebPoint(175, 5));
 
   EXPECT_TRUE(hitTestResult.innerElement());
   EXPECT_TRUE(hitTestResult.scrollbar());
   EXPECT_FALSE(hitTestResult.scrollbar()->isCustomScrollbar());
   EXPECT_TRUE(hitTestResult.scrollbar()->enabled());
 
   // Mouse over scrollbar.
   WebMouseEvent mouseMoveOverDivAndScrollbar(
       WebInputEvent::MouseMove, WebFloatPoint(175, 5), WebFloatPoint(175, 5),
       WebPointerProperties::Button::NoButton, 0, WebInputEvent::NoModifiers,
       TimeTicks::Now().InSeconds());
   mouseMoveOverDivAndScrollbar.setFrameScale(1);
   document->frame()->eventHandler().handleMouseMoveEvent(
       mouseMoveOverDivAndScrollbar, Vector<WebMouseEvent>());
 
   // Not change the DIV :hover.
-  EXPECT_EQ(document->hoverNode(), parentDiv);
+  EXPECT_EQ(document->hoverElement(), parentDiv);
 
   // Disable the Scrollbar by remove the childDiv.
   childDiv->remove();
   webView->updateAllLifecyclePhases();
 
   // Ensure hittest has DIV and no scrollbar.
   hitTestResult = webView->coreHitTestResultAt(WebPoint(175, 5));
 
   EXPECT_TRUE(hitTestResult.innerElement());
   EXPECT_TRUE(hitTestResult.scrollbar());
   EXPECT_FALSE(hitTestResult.scrollbar()->enabled());
   EXPECT_LT(hitTestResult.innerElement()->clientWidth(), 180);
 
   // Mouse over disabled scrollbar.
   document->frame()->eventHandler().handleMouseMoveEvent(
       mouseMoveOverDivAndScrollbar, Vector<WebMouseEvent>());
 
   // Not change the DIV :hover.
-  EXPECT_EQ(document->hoverNode(), parentDiv);
+  EXPECT_EQ(document->hoverElement(), parentDiv);
 }
 
 TEST_F(WebFrameTest, MouseReleaseUpdatesScrollbarHoveredPart) {
   registerMockedHttpURLLoad("custom-scrollbar-hover.html");
   FrameTestHelpers::WebViewHelper webViewHelper;
   WebViewImpl* webView = webViewHelper.initializeAndLoad(
       m_baseURL + "custom-scrollbar-hover.html");
 
   webViewHelper.resize(WebSize(200, 200));
 
@@ skipping 359 matching lines @@
   EXPECT_FALSE(testSelectAll("<textarea></textarea>"));
   EXPECT_TRUE(testSelectAll("<textarea>nonempty</textarea>"));
   EXPECT_FALSE(testSelectAll("<input>"));
   EXPECT_TRUE(testSelectAll("<input value='nonempty'>"));
   // TODO(amaralp): Empty contenteditable should not have select all enabled.
   EXPECT_TRUE(testSelectAll("<div contenteditable></div>"));
   EXPECT_TRUE(testSelectAll("<div contenteditable>nonempty</div>"));
 }
 
 }  // namespace blink