Extract more of the mouse logic from EventHandler

third_party/WebKit/Source/core/input/GestureManager.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 GestureManager_h
 #define GestureManager_h
 
 #include "core/CoreExport.h"
 #include "core/frame/LocalFrame.h"
 #include "core/layout/HitTestRequest.h"
 #include "core/page/EventWithHitTestResults.h"
 #include "platform/PlatformEvent.h"
 #include "public/platform/WebInputEventResult.h"
 
 namespace blink {
 
 class ScrollManager;
 class SelectionController;
 class PointerEventManager;
+class MouseEventManager;
 
 // This class takes care of gestures and delegating the action based on the
 // gesture to the responsible class.
 class CORE_EXPORT GestureManager : public GarbageCollectedFinalized<GestureManager> {

[bokan, 2016/09/30 16:57:55]

Please make sure we're only using the Finalized version of GarbageCollected on
these managers if they have a non-trivial destructor.

[Navid Zolghadr, 2016/10/03 16:03:00]

This wasn't quite possible. There are some fields in the class that cause
compile error if I don't use finalized version.

     WTF_MAKE_NONCOPYABLE(GestureManager);
 
 public:
-    GestureManager(LocalFrame*, ScrollManager*, PointerEventManager*,
-        SelectionController*);
+    GestureManager(LocalFrame*, ScrollManager*, MouseEventManager*,
+        PointerEventManager*, SelectionController*);
     DECLARE_TRACE();
 
     void clear();
 
     HitTestRequest::HitTestRequestType getHitTypeForGestureType(PlatformEvent::EventType);
     WebInputEventResult handleGestureEventInFrame(const GestureEventWithHitTestResults&);
 
     // TODO(nzolghadr): This can probably be hidden and the related logic
     // be moved to this class (see crrev.com/112023010). Since that might cause
     // regression it's better to move that logic in another change.
@@ skipping 10 matching lines @@
     WebInputEventResult sendContextMenuEventForGesture(const GestureEventWithHitTestResults&);
 
     FrameHost* frameHost() const;
 
     // NOTE: If adding a new field to this class please ensure that it is
     // cleared if needed in |GestureManager::clear()|.
 
     const Member<LocalFrame> m_frame;
 
     Member<ScrollManager> m_scrollManager;
+    Member<MouseEventManager> m_mouseEventManager;
     Member<PointerEventManager> m_pointerEventManager;
 
     // Set on GestureTapDown if the |pointerdown| event corresponding to the
     // triggering |touchstart| event was canceled. This suppresses mouse event
     // firing for the current gesture sequence (i.e. until next GestureTapDown).
     bool m_suppressMouseEventsFromGestures;
 
     bool m_longTapShouldInvokeContextMenu;
 
     const Member<SelectionController> m_selectionController;
 
     double m_lastShowPressTimestamp;
 };
 
 } // namespace blink
 
 #endif // GestureManager_h