gecko-dev/dom/events/UIEvent.h

194 строки
6.0 KiB
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/* -*- 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_