Separate mouse transition events from pointerevent

third_party/WebKit/Source/core/input/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * 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 1238 matching lines @@
 
     WebInputEventResult eventResult = WebInputEventResult::NotHandled;
     RefPtrWillBeRawPtr<LocalFrame> newSubframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);
 
     // We want mouseouts to happen first, from the inside out.  First send a move event to the last subframe so that it will fire mouseouts.
     if (m_lastMouseMoveEventSubframe && m_lastMouseMoveEventSubframe->tree().isDescendantOf(m_frame) && m_lastMouseMoveEventSubframe != newSubframe)
         m_lastMouseMoveEventSubframe->eventHandler().handleMouseLeaveEvent(mev.event());
 
     if (newSubframe) {
         // Update over/out state before passing the event to the subframe.
-        updateMouseEventTargetNode(mev.innerNode(), mev.event());
+        updateMouseEventTargetNode(mev.innerNode(), mev.event(), true);
 
         // Event dispatch in updateMouseEventTargetNode may have caused the subframe of the target
         // node to be detached from its FrameView, in which case the event should not be passed.
         if (newSubframe->view())
             eventResult = passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode);
     } else {
         if (scrollbar && !m_mousePressed)
             scrollbar->mouseMoved(mev.event()); // Handle hover effects on platforms that support visual feedback on scrollbar hovering.
         if (FrameView* view = m_frame->view()) {
             OptionalCursor optionalCursor = selectCursor(mev.hitTestResult());
@@ skipping 313 matching lines @@
 }
 
 MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestRequest& request, const PlatformMouseEvent& mev)
 {
     ASSERT(m_frame);
     ASSERT(m_frame->document());
 
     return m_frame->document()->prepareMouseEvent(request, contentPointFromRootFrame(m_frame, mev.position()), mev);
 }
 
-void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMouseEvent& mouseEvent)
+void EventHandler::updateMouseEventTargetNode(Node* targetNode,
+    const PlatformMouseEvent& mouseEvent, bool setPointerPosition)
 {
     Node* result = targetNode;
 
     // If we're capturing, we always go right to that node.
     if (m_capturingMouseEventsNode) {
         result = m_capturingMouseEventsNode.get();
     } else {
         // If the target node is a text node, dispatch on the parent node - rdar://4196646
         if (result && result->isTextNode())
             result = FlatTreeTraversal::parent(*result);
@@ skipping 28 matching lines @@
         if (ScrollableArea* scrollableAreaForNodeUnderMouse = associatedScrollableArea(layerForNodeUnderMouse))
             scrollableAreaForNodeUnderMouse->mouseEnteredContentArea();
     }
 
     if (lastNodeUnderMouse && lastNodeUnderMouse->document() != m_frame->document()) {
         lastNodeUnderMouse = nullptr;
         m_lastScrollbarUnderMouse = nullptr;
     }
 
     m_pointerEventManager.sendNodeTransitionEvents(lastNodeUnderMouse,
-        m_nodeUnderMouse, mouseEvent, m_frame->document()->domWindow());
+        m_nodeUnderMouse, mouseEvent, m_frame->document()->domWindow(),
+        setPointerPosition);
 }
 
 WebInputEventResult EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, int clickCount, const PlatformMouseEvent& mouseEvent)
 {
     updateMouseEventTargetNode(targetNode, mouseEvent);
     if (!m_nodeUnderMouse)
         return WebInputEventResult::NotHandled;
 
     RefPtrWillBeRawPtr<MouseEvent> event = MouseEvent::create(eventType, m_nodeUnderMouse->document().domWindow(), mouseEvent, clickCount, nullptr);
     return toWebInputEventResult(m_nodeUnderMouse->dispatchEvent(event));
@@ skipping 21 matching lines @@
 }
 
 // TODO(mustaq): Make PE drive ME dispatch & bookkeeping in EventHandler.
 WebInputEventResult EventHandler::updatePointerTargetAndDispatchEvents(const AtomicString& mouseEventType, Node* targetNode, int clickCount, const PlatformMouseEvent& mouseEvent)
 {
     ASSERT(mouseEventType == EventTypeNames::mousedown
         || mouseEventType == EventTypeNames::mousemove
         || mouseEventType == EventTypeNames::mouseup);
 
     updateMouseEventTargetNode(targetNode, mouseEvent);
-    if (!m_nodeUnderMouse)
-        return WebInputEventResult::NotHandled;
 
     return m_pointerEventManager.sendMousePointerEvent(
         m_nodeUnderMouse, mouseEventType, clickCount, mouseEvent, nullptr,
         m_frame->document()->domWindow());
 }
 
 WebInputEventResult EventHandler::handleMouseFocus(const MouseEventWithHitTestResults& targetedEvent, InputDeviceCapabilities* sourceCapabilities)
 {
     // If clicking on a frame scrollbar, do not mess up with content focus.
     if (targetedEvent.hitTestResult().scrollbar() && m_frame->contentLayoutObject()) {
@@ skipping 2273 matching lines @@
 PlatformEvent::Modifiers EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return static_cast<PlatformEvent::Modifiers>(PlatformEvent::CtrlKey | PlatformEvent::AltKey);
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace blink