diff -r 000000000000 -r 6474c204b198 dom/events/UIEvent.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/events/UIEvent.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,193 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_UIEvent_h_
+#define mozilla_dom_UIEvent_h_
+
+#include "mozilla/Attributes.h"
+#include "mozilla/dom/Event.h"
+#include "mozilla/dom/UIEventBinding.h"
+#include "nsDeviceContext.h"
+#include "nsIDOMUIEvent.h"
+#include "nsLayoutUtils.h"
+#include "nsPresContext.h"
+
+class nsINode;
+
+namespace mozilla {
+namespace dom {
+
+class UIEvent : public Event,
+                public nsIDOMUIEvent
+{
+public:
+  UIEvent(EventTarget* aOwner,
+          nsPresContext* aPresContext,
+          WidgetGUIEvent* aEvent);
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(UIEvent, Event)
+
+  // nsIDOMUIEvent Interface
+  NS_DECL_NSIDOMUIEVENT
+
+  // Forward to Event
+  NS_FORWARD_TO_EVENT_NO_SERIALIZATION_NO_DUPLICATION
+  NS_IMETHOD DuplicatePrivateData() MOZ_OVERRIDE;
+  NS_IMETHOD_(void) Serialize(IPC::Message* aMsg, bool aSerializeInterfaceType) MOZ_OVERRIDE;
+  NS_IMETHOD_(bool) Deserialize(const IPC::Message* aMsg, void** aIter) MOZ_OVERRIDE;
+
+  static nsIntPoint CalculateScreenPoint(nsPresContext* aPresContext,
+                                         WidgetEvent* aEvent)
+  {
+    if (!aEvent ||
+        (aEvent->eventStructType != NS_MOUSE_EVENT &&
+         aEvent->eventStructType != NS_MOUSE_SCROLL_EVENT &&
+         aEvent->eventStructType != NS_WHEEL_EVENT &&
+         aEvent->eventStructType != NS_DRAG_EVENT &&
+         aEvent->eventStructType != NS_POINTER_EVENT &&
+         aEvent->eventStructType != NS_SIMPLE_GESTURE_EVENT)) {
+      return nsIntPoint(0, 0);
+    }
+
+    WidgetGUIEvent* event = aEvent->AsGUIEvent();
+    if (!event->widget) {
+      return LayoutDeviceIntPoint::ToUntyped(aEvent->refPoint);
+    }
+
+    LayoutDeviceIntPoint offset = aEvent->refPoint +
+      LayoutDeviceIntPoint::FromUntyped(event->widget->WidgetToScreenOffset());
+    nscoord factor =
+      aPresContext->DeviceContext()->UnscaledAppUnitsPerDevPixel();
+    return nsIntPoint(nsPresContext::AppUnitsToIntCSSPixels(offset.x * factor),
+                      nsPresContext::AppUnitsToIntCSSPixels(offset.y * factor));
+  }
+
+  static CSSIntPoint CalculateClientPoint(nsPresContext* aPresContext,
+                                          WidgetEvent* aEvent,
+                                          CSSIntPoint* aDefaultClientPoint)
+  {
+    if (!aEvent ||
+        (aEvent->eventStructType != NS_MOUSE_EVENT &&
+         aEvent->eventStructType != NS_MOUSE_SCROLL_EVENT &&
+         aEvent->eventStructType != NS_WHEEL_EVENT &&
+         aEvent->eventStructType != NS_DRAG_EVENT &&
+         aEvent->eventStructType != NS_POINTER_EVENT &&
+         aEvent->eventStructType != NS_SIMPLE_GESTURE_EVENT) ||
+        !aPresContext ||
+        !aEvent->AsGUIEvent()->widget) {
+      return aDefaultClientPoint
+             ? *aDefaultClientPoint
+             : CSSIntPoint(0, 0);
+    }
+
+    nsIPresShell* shell = aPresContext->GetPresShell();
+    if (!shell) {
+      return CSSIntPoint(0, 0);
+    }
+    nsIFrame* rootFrame = shell->GetRootFrame();
+    if (!rootFrame) {
+      return CSSIntPoint(0, 0);
+    }
+    nsPoint pt =
+      nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, rootFrame);
+
+    return CSSIntPoint::FromAppUnitsRounded(pt);
+  }
+
+  static already_AddRefed<UIEvent> Constructor(const GlobalObject& aGlobal,
+                                               const nsAString& aType,
+                                               const UIEventInit& aParam,
+                                               ErrorResult& aRv);
+
+  virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE
+  {
+    return UIEventBinding::Wrap(aCx, this);
+  }
+
+  nsIDOMWindow* GetView() const
+  {
+    return mView;
+  }
+
+  int32_t Detail() const
+  {
+    return mDetail;
+  }
+
+  int32_t LayerX() const
+  {
+    return GetLayerPoint().x;
+  }
+
+  int32_t LayerY() const
+  {
+    return GetLayerPoint().y;
+  }
+
+  int32_t PageX() const;
+  int32_t PageY() const;
+
+  virtual uint32_t Which()
+  {
+    MOZ_ASSERT(mEvent->eventStructType != NS_KEY_EVENT,
+               "Key events should override Which()");
+    MOZ_ASSERT(mEvent->eventStructType != NS_MOUSE_EVENT,
+               "Mouse events should override Which()");
+    return 0;
+  }
+
+  already_AddRefed<nsINode> GetRangeParent();
+
+  int32_t RangeOffset() const;
+
+  bool CancelBubble() const
+  {
+    return mEvent->mFlags.mPropagationStopped;
+  }
+
+  bool IsChar() const;
+
+protected:
+  // Internal helper functions
+  nsIntPoint GetMovementPoint();
+  nsIntPoint GetLayerPoint() const;
+
+  nsCOMPtr<nsIDOMWindow> mView;
+  int32_t mDetail;
+  CSSIntPoint mClientPoint;
+  // Screenpoint is mEvent->refPoint.
+  nsIntPoint mLayerPoint;
+  CSSIntPoint mPagePoint;
+  nsIntPoint mMovementPoint;
+  bool mIsPointerLocked;
+  CSSIntPoint mLastClientPoint;
+
+  static Modifiers ComputeModifierState(const nsAString& aModifiersList);
+  bool GetModifierStateInternal(const nsAString& aKey);
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#define NS_FORWARD_TO_UIEVENT                               \
+  NS_FORWARD_NSIDOMUIEVENT(UIEvent::)                       \
+  NS_FORWARD_TO_EVENT_NO_SERIALIZATION_NO_DUPLICATION       \
+  NS_IMETHOD DuplicatePrivateData()                         \
+  {                                                         \
+    return UIEvent::DuplicatePrivateData();                 \
+  }                                                         \
+  NS_IMETHOD_(void) Serialize(IPC::Message* aMsg,           \
+                              bool aSerializeInterfaceType) \
+  {                                                         \
+    UIEvent::Serialize(aMsg, aSerializeInterfaceType);      \
+  }                                                         \
+  NS_IMETHOD_(bool) Deserialize(const IPC::Message* aMsg,   \
+                                void** aIter)               \
+  {                                                         \
+    return UIEvent::Deserialize(aMsg, aIter);               \
+  }
+
+#endif // mozilla_dom_UIEvent_h_