Add a flag to update hover effect when a layout is changed

third_party/WebKit/Source/core/input/MouseEventManager.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MouseEventManager_h
 #define MouseEventManager_h
 
 #include "core/CoreExport.h"
 #include "core/dom/SynchronousMutationObserver.h"
 #include "core/input/BoundaryEventDispatcher.h"
@@ skipping 12 matching lines @@
 class DataTransfer;
 class Element;
 class FloatQuad;
 class HitTestResult;
 class InputDeviceCapabilities;
 class LocalFrame;
 class ScrollManager;
 
 enum class DragInitiator;
 
+enum class DispatchInterval { kDuringScroll, kPerFrame };

[dtapuska, 2017/06/28 19:15:18]

Perhaps this can be scoped into the EventHandler class? As well the
DispatchInterval name is a little odd since it isn't an Interval. Maybe
something like FakeMouseMoveReason?

[lanwei, 2017/07/04 18:37:15]

Done.

+
 // This class takes care of dispatching all mouse events and keeps track of
 // positions and states of mouse.
 class CORE_EXPORT MouseEventManager final
     : public GarbageCollectedFinalized<MouseEventManager>,
       public SynchronousMutationObserver {
   WTF_MAKE_NONCOPYABLE(MouseEventManager);
   USING_GARBAGE_COLLECTED_MIXIN(MouseEventManager);
 
  public:
   MouseEventManager(LocalFrame&, ScrollManager&);
@@ skipping 37 matching lines @@
                          const String& canvas_region_id,
                          const WebMouseEvent&);
 
   WebInputEventResult HandleMouseFocus(
       const HitTestResult&,
       InputDeviceCapabilities* source_capabilities);
 
   void FakeMouseMoveEventTimerFired(TimerBase*);
 
   void CancelFakeMouseMoveEvent();
-  void DispatchFakeMouseMoveEventSoon();
+  void DispatchFakeMouseMoveEventSoon(DispatchInterval);
   void DispatchFakeMouseMoveEventSoonInQuad(const FloatQuad&);
 
   void SetLastKnownMousePosition(const WebMouseEvent&);
 
   bool HandleDragDropIfPossible(const GestureEventWithHitTestResults&);
 
   WebInputEventResult HandleMouseDraggedEvent(
       const MouseEventWithHitTestResults&);
   WebInputEventResult HandleMousePressEvent(
       const MouseEventWithHitTestResults&);
@@ skipping 40 matching lines @@
   }
 
   Node* MousePressNode();
   void SetMousePressNode(Node*);
 
   void SetClickElement(Element*);
   void SetClickCount(int);
 
   bool MouseDownMayStartDrag();
 
+  bool FakeMouseMovePending();

[dtapuska, 2017/06/28 19:15:18]

const?

[lanwei, 2017/07/04 18:37:15]

Done.

+
  private:
   class MouseEventBoundaryEventDispatcher : public BoundaryEventDispatcher {
     WTF_MAKE_NONCOPYABLE(MouseEventBoundaryEventDispatcher);
 
    public:
     MouseEventBoundaryEventDispatcher(MouseEventManager*,
                                       const WebMouseEvent*,
                                       EventTarget* exited_target,
                                       const String& canvas_region_id);
 
@@ skipping 79 matching lines @@
   WebMouseEvent mouse_down_;
 
   LayoutPoint drag_start_pos_;
 
   TaskRunnerTimer<MouseEventManager> fake_mouse_move_event_timer_;
 };
 
 }  // namespace blink
 
 #endif  // MouseEventManager_h