Add support for DOM Level 3 WheelEvent

Source/core/dom/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
  * 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.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/dom/WheelEvent.h"
 
 #include "core/dom/Clipboard.h"
 #include "core/dom/EventNames.h"
 #include "core/platform/PlatformWheelEvent.h"
 
 namespace WebCore {
 
 WheelEventInit::WheelEventInit()
-    : wheelDeltaX(0)
+    : deltaX(0)
+    , deltaY(0)
+    , deltaZ(0)
+    , wheelDeltaX(0)
     , wheelDeltaY(0)
     , deltaMode(WheelEvent::DOM_DELTA_PIXEL)
 {
 }
 
 WheelEvent::WheelEvent()
     : m_deltaMode(DOM_DELTA_PIXEL)
     , m_directionInvertedFromDevice(false)
 {
     ScriptWrappable::init(this);
 }
 
 WheelEvent::WheelEvent(const AtomicString& type, const WheelEventInit& initializer)
     : MouseEvent(type, initializer)
-    , m_wheelDelta(IntPoint(initializer.wheelDeltaX, initializer.wheelDeltaY))
+    , m_deltaX(initializer.deltaX ? initializer.deltaX : initializer.wheelDeltaX)
+    , m_deltaY(initializer.deltaY ? initializer.deltaY : initializer.wheelDeltaY)
+    , m_deltaZ(initializer.deltaZ)
     , m_deltaMode(initializer.deltaMode)
 {
     ScriptWrappable::init(this);
 }
 
 WheelEvent::WheelEvent(const FloatPoint& wheelTicks, const FloatPoint& rawDelta, unsigned deltaMode,
     PassRefPtr<AbstractView> view, const IntPoint& screenLocation, const IntPoint& pageLocation,
     bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool directionInvertedFromDevice)
-    : MouseEvent(eventNames().mousewheelEvent,
+    : MouseEvent(eventNames().wheelEvent,
                  true, true, view, 0, screenLocation.x(), screenLocation.y(),
                  pageLocation.x(), pageLocation.y(),
                  0, 0,
                  ctrlKey, altKey, shiftKey, metaKey, 0, 0, 0, false)
-    , m_wheelDelta(IntPoint(static_cast<int>(wheelTicks.x() * TickMultiplier), static_cast<int>(wheelTicks.y() * TickMultiplier)))
+    , m_deltaX(wheelTicks.x() * TickMultiplier)
+    , m_deltaY(wheelTicks.y() * TickMultiplier)
+    , m_deltaZ(0) // FIXME: Not supported.
     , m_rawDelta(roundedIntPoint(rawDelta))
     , m_deltaMode(deltaMode)
     , m_directionInvertedFromDevice(directionInvertedFromDevice)
 {
     ScriptWrappable::init(this);
 }
 
 void WheelEvent::initWheelEvent(int rawDeltaX, int rawDeltaY, PassRefPtr<AbstractView> view,
                                 int screenX, int screenY, int pageX, int pageY,
                                 bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
 {
     if (dispatched())
         return;
 
-    initUIEvent(eventNames().mousewheelEvent, true, true, view, 0);
+    initUIEvent(eventNames().wheelEvent, true, true, view, 0);
 
     m_screenLocation = IntPoint(screenX, screenY);
     m_ctrlKey = ctrlKey;
     m_altKey = altKey;
     m_shiftKey = shiftKey;
     m_metaKey = metaKey;
 
-    // Normalize to the Windows 120 multiple
-    m_wheelDelta = IntPoint(rawDeltaX * TickMultiplier, rawDeltaY * TickMultiplier);
-
+    m_deltaX = rawDeltaX * TickMultiplier;
+    m_deltaY = rawDeltaY * TickMultiplier;
     m_rawDelta = IntPoint(rawDeltaX, rawDeltaY);
     m_deltaMode = DOM_DELTA_PIXEL;
     m_directionInvertedFromDevice = false;
 
     initCoordinates(IntPoint(pageX, pageY));
 }
 
 void WheelEvent::initWebKitWheelEvent(int rawDeltaX, int rawDeltaY, PassRefPtr<AbstractView> view,
                                       int screenX, int screenY, int pageX, int pageY,
                                       bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
@@ skipping 37 matching lines @@
     return static_cast<WheelEvent*>(EventDispatchMediator::event());
 }
 
 bool WheelEventDispatchMediator::dispatchEvent(EventDispatcher* dispatcher) const
 {
     ASSERT(event());
     return EventDispatchMediator::dispatchEvent(dispatcher) && !event()->defaultHandled();
 }
 
 } // namespace WebCore