gecko-dev/dom/events/PointerEvent.cpp

265 строки
7.7 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/.
*
* Portions Copyright 2013 Microsoft Open Technologies, Inc. */
#include "mozilla/dom/PointerEvent.h"
#include "mozilla/dom/PointerEventBinding.h"
#include "mozilla/MouseEvents.h"
#include "prtime.h"
namespace mozilla {
namespace dom {
PointerEvent::PointerEvent(EventTarget* aOwner,
nsPresContext* aPresContext,
WidgetPointerEvent* aEvent)
: MouseEvent(aOwner, aPresContext,
aEvent ? aEvent :
new WidgetPointerEvent(false, eVoidEvent, nullptr))
{
NS_ASSERTION(mEvent->mClass == ePointerEventClass,
"event type mismatch ePointerEventClass");
WidgetMouseEvent* mouseEvent = mEvent->AsMouseEvent();
if (aEvent) {
mEventIsInternal = false;
} else {
mEventIsInternal = true;
mEvent->mTime = PR_Now();
mEvent->mRefPoint = LayoutDeviceIntPoint(0, 0);
mouseEvent->inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
}
// 5.2 Pointer Event types, for all pointer events, |detail| attribute SHOULD
// be 0.
mDetail = 0;
}
JSObject*
PointerEvent::WrapObjectInternal(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto)
{
return PointerEventBinding::Wrap(aCx, this, aGivenProto);
}
static uint16_t
ConvertStringToPointerType(const nsAString& aPointerTypeArg)
{
if (aPointerTypeArg.EqualsLiteral("mouse")) {
return nsIDOMMouseEvent::MOZ_SOURCE_MOUSE;
}
if (aPointerTypeArg.EqualsLiteral("pen")) {
return nsIDOMMouseEvent::MOZ_SOURCE_PEN;
}
if (aPointerTypeArg.EqualsLiteral("touch")) {
return nsIDOMMouseEvent::MOZ_SOURCE_TOUCH;
}
return nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
}
void
ConvertPointerTypeToString(uint16_t aPointerTypeSrc, nsAString& aPointerTypeDest)
{
switch (aPointerTypeSrc) {
case nsIDOMMouseEvent::MOZ_SOURCE_MOUSE:
aPointerTypeDest.AssignLiteral("mouse");
break;
case nsIDOMMouseEvent::MOZ_SOURCE_PEN:
aPointerTypeDest.AssignLiteral("pen");
break;
case nsIDOMMouseEvent::MOZ_SOURCE_TOUCH:
aPointerTypeDest.AssignLiteral("touch");
break;
default:
aPointerTypeDest.Truncate();
break;
}
}
// static
already_AddRefed<PointerEvent>
PointerEvent::Constructor(EventTarget* aOwner,
const nsAString& aType,
const PointerEventInit& aParam)
{
RefPtr<PointerEvent> e = new PointerEvent(aOwner, nullptr, nullptr);
bool trusted = e->Init(aOwner);
e->InitMouseEvent(aType, aParam.mBubbles, aParam.mCancelable,
aParam.mView, aParam.mDetail, aParam.mScreenX,
aParam.mScreenY, aParam.mClientX, aParam.mClientY,
false, false, false, false, aParam.mButton,
aParam.mRelatedTarget);
e->InitializeExtraMouseEventDictionaryMembers(aParam);
WidgetPointerEvent* widgetEvent = e->mEvent->AsPointerEvent();
widgetEvent->pointerId = aParam.mPointerId;
widgetEvent->mWidth = aParam.mWidth;
widgetEvent->mHeight = aParam.mHeight;
widgetEvent->pressure = aParam.mPressure;
widgetEvent->tangentialPressure = aParam.mTangentialPressure;
widgetEvent->tiltX = aParam.mTiltX;
widgetEvent->tiltY = aParam.mTiltY;
widgetEvent->twist = aParam.mTwist;
widgetEvent->inputSource = ConvertStringToPointerType(aParam.mPointerType);
widgetEvent->mIsPrimary = aParam.mIsPrimary;
widgetEvent->buttons = aParam.mButtons;
if (!aParam.mCoalescedEvents.IsEmpty()) {
e->mCoalescedEvents.AppendElements(aParam.mCoalescedEvents);
}
e->SetTrusted(trusted);
e->SetComposed(aParam.mComposed);
return e.forget();
}
// static
already_AddRefed<PointerEvent>
PointerEvent::Constructor(const GlobalObject& aGlobal,
const nsAString& aType,
const PointerEventInit& aParam,
ErrorResult& aRv)
{
nsCOMPtr<EventTarget> owner = do_QueryInterface(aGlobal.GetAsSupports());
return Constructor(owner, aType, aParam);
}
NS_IMPL_CYCLE_COLLECTION_CLASS(PointerEvent)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(PointerEvent, MouseEvent)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mCoalescedEvents)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(PointerEvent, MouseEvent)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mCoalescedEvents)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PointerEvent)
NS_INTERFACE_MAP_END_INHERITING(MouseEvent)
NS_IMPL_ADDREF_INHERITED(PointerEvent, MouseEvent)
NS_IMPL_RELEASE_INHERITED(PointerEvent, MouseEvent)
void
PointerEvent::GetPointerType(nsAString& aPointerType)
{
ConvertPointerTypeToString(mEvent->AsPointerEvent()->inputSource, aPointerType);
}
int32_t
PointerEvent::PointerId()
{
return mEvent->AsPointerEvent()->pointerId;
}
int32_t
PointerEvent::Width()
{
return mEvent->AsPointerEvent()->mWidth;
}
int32_t
PointerEvent::Height()
{
return mEvent->AsPointerEvent()->mHeight;
}
float
PointerEvent::Pressure()
{
return mEvent->AsPointerEvent()->pressure;
}
float
PointerEvent::TangentialPressure()
{
return mEvent->AsPointerEvent()->tangentialPressure;
}
int32_t
PointerEvent::TiltX()
{
return mEvent->AsPointerEvent()->tiltX;
}
int32_t
PointerEvent::TiltY()
{
return mEvent->AsPointerEvent()->tiltY;
}
int32_t
PointerEvent::Twist()
{
return mEvent->AsPointerEvent()->twist;
}
bool
PointerEvent::IsPrimary()
{
return mEvent->AsPointerEvent()->mIsPrimary;
}
void
PointerEvent::GetCoalescedEvents(nsTArray<RefPtr<PointerEvent>>& aPointerEvents)
{
WidgetPointerEvent* widgetEvent = mEvent->AsPointerEvent();
if (mCoalescedEvents.IsEmpty() && widgetEvent &&
widgetEvent->mCoalescedWidgetEvents &&
!widgetEvent->mCoalescedWidgetEvents->mEvents.IsEmpty()) {
for (WidgetPointerEvent& event :
widgetEvent->mCoalescedWidgetEvents->mEvents) {
RefPtr<PointerEvent> domEvent =
NS_NewDOMPointerEvent(nullptr, nullptr, &event);
// The dom event is derived from an OS generated widget event. Setup
// mWidget and mPresContext since they are necessary to calculate
// offsetX / offsetY.
domEvent->mEvent->AsGUIEvent()->mWidget = widgetEvent->mWidget;
domEvent->mPresContext = mPresContext;
// The coalesced widget mouse events shouldn't have been dispatched.
MOZ_ASSERT(!domEvent->mEvent->mTarget);
// The event target should be the same as the dispatched event's target.
domEvent->mEvent->mTarget = mEvent->mTarget;
// JS could hold reference to dom events. We have to ask dom event to
// duplicate its private data to avoid the widget event is destroyed.
domEvent->DuplicatePrivateData();
// Setup mPresContext again after DuplicatePrivateData since it clears
// mPresContext.
domEvent->mPresContext = mPresContext;
mCoalescedEvents.AppendElement(domEvent);
}
}
if (mEvent->mTarget) {
for (RefPtr<PointerEvent>& pointerEvent : mCoalescedEvents) {
// Only set event target when it's null.
if (!pointerEvent->mEvent->mTarget) {
pointerEvent->mEvent->mTarget = mEvent->mTarget;
}
}
}
aPointerEvents.AppendElements(mCoalescedEvents);
}
} // namespace dom
} // namespace mozilla
using namespace mozilla;
using namespace mozilla::dom;
already_AddRefed<PointerEvent>
NS_NewDOMPointerEvent(EventTarget* aOwner,
nsPresContext* aPresContext,
WidgetPointerEvent *aEvent)
{
RefPtr<PointerEvent> it = new PointerEvent(aOwner, aPresContext, aEvent);
return it.forget();
}