gecko-dev/dom/events/UIEvent.h
2015-05-03 15:32:37 -04:00

198 lines
6.1 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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() override;
NS_IMETHOD_(void) Serialize(IPC::Message* aMsg, bool aSerializeInterfaceType) override;
NS_IMETHOD_(bool) Deserialize(const IPC::Message* aMsg, void** aIter) override;
static LayoutDeviceIntPoint CalculateScreenPoint(nsPresContext* aPresContext,
WidgetEvent* aEvent)
{
if (!aEvent ||
(aEvent->mClass != eMouseEventClass &&
aEvent->mClass != eMouseScrollEventClass &&
aEvent->mClass != eWheelEventClass &&
aEvent->mClass != eDragEventClass &&
aEvent->mClass != ePointerEventClass &&
aEvent->mClass != eSimpleGestureEventClass)) {
return LayoutDeviceIntPoint(0, 0);
}
WidgetGUIEvent* event = aEvent->AsGUIEvent();
if (!event->widget) {
return aEvent->refPoint;
}
LayoutDeviceIntPoint offset = aEvent->refPoint + event->widget->WidgetToScreenOffset();
nscoord factor =
aPresContext->DeviceContext()->AppUnitsPerDevPixelAtUnitFullZoom();
return LayoutDeviceIntPoint(nsPresContext::AppUnitsToIntCSSPixels(offset.x * factor),
nsPresContext::AppUnitsToIntCSSPixels(offset.y * factor));
}
static CSSIntPoint CalculateClientPoint(nsPresContext* aPresContext,
WidgetEvent* aEvent,
CSSIntPoint* aDefaultClientPoint)
{
if (!aEvent ||
(aEvent->mClass != eMouseEventClass &&
aEvent->mClass != eMouseScrollEventClass &&
aEvent->mClass != eWheelEventClass &&
aEvent->mClass != eDragEventClass &&
aEvent->mClass != ePointerEventClass &&
aEvent->mClass != eSimpleGestureEventClass) ||
!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* WrapObjectInternal(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override
{
return UIEventBinding::Wrap(aCx, this, aGivenProto);
}
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->mClass != eKeyboardEventClass,
"Key events should override Which()");
MOZ_ASSERT(mEvent->mClass != eMouseEventClass,
"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:
~UIEvent() {}
// 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);
void InitModifiers(const EventModifierInit& aParam);
};
} // namespace dom
} // namespace mozilla
#define NS_FORWARD_TO_UIEVENT \
NS_FORWARD_NSIDOMUIEVENT(UIEvent::) \
NS_FORWARD_TO_EVENT_NO_SERIALIZATION_NO_DUPLICATION \
NS_IMETHOD DuplicatePrivateData() override \
{ \
return UIEvent::DuplicatePrivateData(); \
} \
NS_IMETHOD_(void) Serialize(IPC::Message* aMsg, \
bool aSerializeInterfaceType) \
override \
{ \
UIEvent::Serialize(aMsg, aSerializeInterfaceType); \
} \
NS_IMETHOD_(bool) Deserialize(const IPC::Message* aMsg, \
void** aIter) override \
{ \
return UIEvent::Deserialize(aMsg, aIter); \
}
#endif // mozilla_dom_UIEvent_h_