Add support for DOM Level 3 WheelEvent

Source/core/dom/WheelEvent.h

 /*
  * 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, 2004, 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
@@ skipping 12 matching lines @@
 #include "core/dom/MouseEvent.h"
 #include "core/platform/graphics/FloatPoint.h"
 
 namespace WebCore {
 
 class PlatformWheelEvent;
 
 struct WheelEventInit : public MouseEventInit {
     WheelEventInit();
 
-    int wheelDeltaX;
-    int wheelDeltaY;
+    double deltaX;
+    double deltaY;
+    double deltaZ;
+    int wheelDeltaX; // Deprecated.
+    int wheelDeltaY; // Deprecated.
     unsigned deltaMode;
 };
 
 class WheelEvent : public MouseEvent {
 public:
     enum { TickMultiplier = 120 };
 
     enum DeltaMode {
         DOM_DELTA_PIXEL = 0,
         DOM_DELTA_LINE,
@@ skipping 20 matching lines @@
     }
 
     void initWheelEvent(int rawDeltaX, int rawDeltaY, PassRefPtr<AbstractView>,
         int screenX, int screenY, int pageX, int pageY,
         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey);
 
     void initWebKitWheelEvent(int rawDeltaX, int rawDeltaY, PassRefPtr<AbstractView>,
         int screenX, int screenY, int pageX, int pageY,
         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey);
 
-    int wheelDelta() const { return m_wheelDelta.y() ? m_wheelDelta.y() : m_wheelDelta.x(); }
-    int wheelDeltaX() const { return m_wheelDelta.x(); }
-    int wheelDeltaY() const { return m_wheelDelta.y(); }
+    double deltaX() const { return m_deltaX; }
+    double deltaY() const { return m_deltaY; }
+    double deltaZ() const { return m_deltaZ; }
+    int wheelDelta() const { return m_deltaY ? m_deltaY : m_deltaX; } // Deprecated.
+    int wheelDeltaX() const { return m_deltaX; } // Deprecated.
+    int wheelDeltaY() const { return m_deltaY; } // Deprecated.
     int rawDeltaX() const { return m_rawDelta.x(); }
     int rawDeltaY() const { return m_rawDelta.y(); }
     unsigned deltaMode() const { return m_deltaMode; }
 
     bool webkitDirectionInvertedFromDevice() const { return m_directionInvertedFromDevice; }
 
     virtual const AtomicString& interfaceName() const;
     virtual bool isMouseEvent() const;
 
 private:
     WheelEvent();
     WheelEvent(const AtomicString&, const WheelEventInit&);
     WheelEvent(const FloatPoint& wheelTicks, const FloatPoint& rawDelta,
         unsigned, PassRefPtr<AbstractView>, const IntPoint& screenLocation, const IntPoint& pageLocation,
         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool directionInvertedFromDevice);
 
-    IntPoint m_wheelDelta;
+    double m_deltaX;
+    double m_deltaY;
+    double m_deltaZ;
     IntPoint m_rawDelta;
     unsigned m_deltaMode;
     bool m_directionInvertedFromDevice;
 };
 
 class WheelEventDispatchMediator : public EventDispatchMediator {
 public:
     static PassRefPtr<WheelEventDispatchMediator> create(const PlatformWheelEvent&, PassRefPtr<AbstractView>);
 private:
     WheelEventDispatchMediator(const PlatformWheelEvent&, PassRefPtr<AbstractView>);
     WheelEvent* event() const;
     virtual bool dispatchEvent(EventDispatcher*) const OVERRIDE;
 };
 
 } // namespace WebCore
 
 #endif // WheelEvent_h