Virtualize EventDispatchMediator creation and cleanup calling.

Source/core/events/WheelEvent.cpp

 /*
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2005, 2006, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 12 matching lines @@
 
 #include "config.h"
 #include "core/events/WheelEvent.h"
 
 #include "core/clipboard/DataTransfer.h"
 #include "platform/PlatformMouseEvent.h"
 #include "platform/PlatformWheelEvent.h"
 
 namespace blink {
 
+inline static unsigned convertDeltaMode(const PlatformWheelEvent& event)
+{
+    return event.granularity() == ScrollByPageWheelEvent ? WheelEvent::DOM_DELTA_PAGE : WheelEvent::DOM_DELTA_PIXEL;
+}
+
+PassRefPtrWillBeRawPtr<WheelEvent> WheelEvent::create(const PlatformWheelEvent& event, PassRefPtrWillBeRawPtr<AbstractView> view)
+{
+    return adoptRefWillBeNoop(new WheelEvent(FloatPoint(event.wheelTicksX(), event.wheelTicksY()), FloatPoint(event.deltaX(), event.deltaY()),
+        convertDeltaMode(event), view, event.globalPosition(), event.position(),
+        event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(),
+        MouseEvent::platformModifiersToButtons(event.modifiers()),
+        event.canScroll(), event.hasPreciseScrollingDeltas(),
+        static_cast<Event::RailsMode>(event.railsMode())));
+}
+
 WheelEvent::WheelEvent()
     : m_deltaX(0)
     , m_deltaY(0)
     , m_deltaZ(0)
     , m_deltaMode(DOM_DELTA_PIXEL)
     , m_canScroll(true)
     , m_hasPreciseScrollingDeltas(false)
     , m_railsMode(RailsModeFree)
 {
 }
@@ skipping 36 matching lines @@
 bool WheelEvent::isMouseEvent() const
 {
     return false;
 }
 
 bool WheelEvent::isWheelEvent() const
 {
     return true;
 }
 
+PassRefPtrWillBeRawPtr<EventDispatchMediator> WheelEvent::createMediator()
+{
+    return WheelEventDispatchMediator::create(this);
+}
+
 DEFINE_TRACE(WheelEvent)
 {
     MouseEvent::trace(visitor);
 }
 
-inline static unsigned deltaMode(const PlatformWheelEvent& event)
+PassRefPtrWillBeRawPtr<WheelEventDispatchMediator> WheelEventDispatchMediator::create(PassRefPtrWillBeRawPtr<WheelEvent> event)
 {
-    return event.granularity() == ScrollByPageWheelEvent ? WheelEvent::DOM_DELTA_PAGE : WheelEvent::DOM_DELTA_PIXEL;
+    return adoptRefWillBeNoop(new WheelEventDispatchMediator(event));
 }
 
-PassRefPtrWillBeRawPtr<WheelEventDispatchMediator> WheelEventDispatchMediator::create(const PlatformWheelEvent& event, PassRefPtrWillBeRawPtr<AbstractView> view)
+WheelEventDispatchMediator::WheelEventDispatchMediator(PassRefPtrWillBeRawPtr<WheelEvent> event)
+    : EventDispatchMediator(event)
 {
-    return adoptRefWillBeNoop(new WheelEventDispatchMediator(event, view));
-}
-
-WheelEventDispatchMediator::WheelEventDispatchMediator(const PlatformWheelEvent& event, PassRefPtrWillBeRawPtr<AbstractView> view)
-{
-    setEvent(WheelEvent::create(FloatPoint(event.wheelTicksX(), event.wheelTicksY()), FloatPoint(event.deltaX(), event.deltaY()),
-        deltaMode(event), view, event.globalPosition(), event.position(),
-        event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(),
-        MouseEvent::platformModifiersToButtons(event.modifiers()),
-        event.canScroll(), event.hasPreciseScrollingDeltas(),
-        static_cast<Event::RailsMode>(event.railsMode())));
 }
 
 WheelEvent& WheelEventDispatchMediator::event() const
 {
     return toWheelEvent(EventDispatchMediator::event());
 }
 
 bool WheelEventDispatchMediator::dispatchEvent(EventDispatcher& dispatcher) const
 {
     if (!(event().deltaX() || event().deltaY()))
         return true;
     return EventDispatchMediator::dispatchEvent(dispatcher) && !event().defaultHandled();
 }
 
 } // namespace blink