gecko-dev/dom/events/MouseEvent.cpp

390 строки
11 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/. */
#include "mozilla/dom/MouseEvent.h"
#include "mozilla/MouseEvents.h"
#include "nsContentUtils.h"
#include "nsIContent.h"
#include "prtime.h"
namespace mozilla {
namespace dom {
MouseEvent::MouseEvent(EventTarget* aOwner,
nsPresContext* aPresContext,
WidgetMouseEventBase* aEvent)
: UIEvent(aOwner, aPresContext,
aEvent ? aEvent :
new WidgetMouseEvent(false, eVoidEvent, nullptr,
WidgetMouseEvent::eReal))
{
// There's no way to make this class' ctor allocate an WidgetMouseScrollEvent.
// It's not that important, though, since a scroll event is not a real
// DOM event.
WidgetMouseEvent* mouseEvent = mEvent->AsMouseEvent();
if (aEvent) {
mEventIsInternal = false;
}
else {
mEventIsInternal = true;
mEvent->mTime = PR_Now();
mEvent->mRefPoint = LayoutDeviceIntPoint(0, 0);
mouseEvent->inputSource = MouseEventBinding::MOZ_SOURCE_UNKNOWN;
}
if (mouseEvent) {
MOZ_ASSERT(mouseEvent->mReason != WidgetMouseEvent::eSynthesized,
"Don't dispatch DOM events from synthesized mouse events");
mDetail = mouseEvent->mClickCount;
}
}
void
MouseEvent::InitMouseEvent(const nsAString& aType,
bool aCanBubble,
bool aCancelable,
nsGlobalWindowInner* aView,
int32_t aDetail,
int32_t aScreenX,
int32_t aScreenY,
int32_t aClientX,
int32_t aClientY,
bool aCtrlKey,
bool aAltKey,
bool aShiftKey,
bool aMetaKey,
uint16_t aButton,
EventTarget* aRelatedTarget)
{
NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
UIEvent::InitUIEvent(aType, aCanBubble, aCancelable, aView, aDetail);
switch(mEvent->mClass) {
case eMouseEventClass:
case eMouseScrollEventClass:
case eWheelEventClass:
case eDragEventClass:
case ePointerEventClass:
case eSimpleGestureEventClass: {
WidgetMouseEventBase* mouseEventBase = mEvent->AsMouseEventBase();
mouseEventBase->mRelatedTarget = aRelatedTarget;
mouseEventBase->button = aButton;
mouseEventBase->InitBasicModifiers(aCtrlKey, aAltKey, aShiftKey, aMetaKey);
mClientPoint.x = aClientX;
mClientPoint.y = aClientY;
mouseEventBase->mRefPoint.x = aScreenX;
mouseEventBase->mRefPoint.y = aScreenY;
WidgetMouseEvent* mouseEvent = mEvent->AsMouseEvent();
if (mouseEvent) {
mouseEvent->mClickCount = aDetail;
}
break;
}
default:
break;
}
}
void
MouseEvent::InitMouseEvent(const nsAString& aType,
bool aCanBubble,
bool aCancelable,
nsGlobalWindowInner* aView,
int32_t aDetail,
int32_t aScreenX,
int32_t aScreenY,
int32_t aClientX,
int32_t aClientY,
int16_t aButton,
EventTarget* aRelatedTarget,
const nsAString& aModifiersList)
{
NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
Modifiers modifiers = ComputeModifierState(aModifiersList);
InitMouseEvent(aType, aCanBubble, aCancelable, aView, aDetail,
aScreenX, aScreenY, aClientX, aClientY,
(modifiers & MODIFIER_CONTROL) != 0,
(modifiers & MODIFIER_ALT) != 0,
(modifiers & MODIFIER_SHIFT) != 0,
(modifiers & MODIFIER_META) != 0,
aButton, aRelatedTarget);
switch(mEvent->mClass) {
case eMouseEventClass:
case eMouseScrollEventClass:
case eWheelEventClass:
case eDragEventClass:
case ePointerEventClass:
case eSimpleGestureEventClass:
mEvent->AsInputEvent()->mModifiers = modifiers;
return;
default:
MOZ_CRASH("There is no space to store the modifiers");
}
}
void
MouseEvent::InitializeExtraMouseEventDictionaryMembers(const MouseEventInit& aParam)
{
InitModifiers(aParam);
mEvent->AsMouseEventBase()->buttons = aParam.mButtons;
mMovementPoint.x = aParam.mMovementX;
mMovementPoint.y = aParam.mMovementY;
}
already_AddRefed<MouseEvent>
MouseEvent::Constructor(const GlobalObject& aGlobal,
const nsAString& aType,
const MouseEventInit& aParam,
ErrorResult& aRv)
{
nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
RefPtr<MouseEvent> e = new MouseEvent(t, nullptr, nullptr);
bool trusted = e->Init(t);
e->InitMouseEvent(aType, aParam.mBubbles, aParam.mCancelable,
aParam.mView, aParam.mDetail, aParam.mScreenX,
aParam.mScreenY, aParam.mClientX, aParam.mClientY,
aParam.mCtrlKey, aParam.mAltKey, aParam.mShiftKey,
aParam.mMetaKey, aParam.mButton, aParam.mRelatedTarget);
e->InitializeExtraMouseEventDictionaryMembers(aParam);
e->SetTrusted(trusted);
e->SetComposed(aParam.mComposed);
return e.forget();
}
void
MouseEvent::InitNSMouseEvent(const nsAString& aType,
bool aCanBubble,
bool aCancelable,
nsGlobalWindowInner* aView,
int32_t aDetail,
int32_t aScreenX,
int32_t aScreenY,
int32_t aClientX,
int32_t aClientY,
bool aCtrlKey,
bool aAltKey,
bool aShiftKey,
bool aMetaKey,
uint16_t aButton,
EventTarget* aRelatedTarget,
float aPressure,
uint16_t aInputSource)
{
NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable,
aView, aDetail, aScreenX, aScreenY,
aClientX, aClientY,
aCtrlKey, aAltKey, aShiftKey,
aMetaKey, aButton, aRelatedTarget);
WidgetMouseEventBase* mouseEventBase = mEvent->AsMouseEventBase();
mouseEventBase->pressure = aPressure;
mouseEventBase->inputSource = aInputSource;
}
int16_t
MouseEvent::Button()
{
switch(mEvent->mClass) {
case eMouseEventClass:
case eMouseScrollEventClass:
case eWheelEventClass:
case eDragEventClass:
case ePointerEventClass:
case eSimpleGestureEventClass:
return mEvent->AsMouseEventBase()->button;
default:
NS_WARNING("Tried to get mouse button for non-mouse event!");
return WidgetMouseEvent::eLeftButton;
}
}
uint16_t
MouseEvent::Buttons()
{
switch(mEvent->mClass) {
case eMouseEventClass:
case eMouseScrollEventClass:
case eWheelEventClass:
case eDragEventClass:
case ePointerEventClass:
case eSimpleGestureEventClass:
return mEvent->AsMouseEventBase()->buttons;
default:
MOZ_CRASH("Tried to get mouse buttons for non-mouse event!");
}
}
already_AddRefed<EventTarget>
MouseEvent::GetRelatedTarget()
{
nsCOMPtr<EventTarget> relatedTarget;
switch(mEvent->mClass) {
case eMouseEventClass:
case eMouseScrollEventClass:
case eWheelEventClass:
case eDragEventClass:
case ePointerEventClass:
case eSimpleGestureEventClass:
relatedTarget = mEvent->AsMouseEventBase()->mRelatedTarget;
break;
default:
break;
}
return EnsureWebAccessibleRelatedTarget(relatedTarget);
}
void
MouseEvent::GetRegion(nsAString& aRegion)
{
SetDOMStringToNull(aRegion);
WidgetMouseEventBase* mouseEventBase = mEvent->AsMouseEventBase();
if (mouseEventBase) {
aRegion = mouseEventBase->region;
}
}
int32_t
MouseEvent::ScreenX(CallerType aCallerType)
{
if (mEvent->mFlags.mIsPositionless) {
return 0;
}
if (nsContentUtils::ResistFingerprinting(aCallerType)) {
// Sanitize to something sort of like client cooords, but not quite
// (defaulting to (0,0) instead of our pre-specified client coords).
return Event::GetClientCoords(mPresContext, mEvent, mEvent->mRefPoint,
CSSIntPoint(0, 0)).x;
}
return Event::GetScreenCoords(mPresContext, mEvent, mEvent->mRefPoint).x;
}
int32_t
MouseEvent::ScreenY(CallerType aCallerType)
{
if (mEvent->mFlags.mIsPositionless) {
return 0;
}
if (nsContentUtils::ResistFingerprinting(aCallerType)) {
// Sanitize to something sort of like client cooords, but not quite
// (defaulting to (0,0) instead of our pre-specified client coords).
return Event::GetClientCoords(mPresContext, mEvent, mEvent->mRefPoint,
CSSIntPoint(0, 0)).y;
}
return Event::GetScreenCoords(mPresContext, mEvent, mEvent->mRefPoint).y;
}
int32_t
MouseEvent::ClientX()
{
if (mEvent->mFlags.mIsPositionless) {
return 0;
}
return Event::GetClientCoords(mPresContext, mEvent, mEvent->mRefPoint,
mClientPoint).x;
}
int32_t
MouseEvent::ClientY()
{
if (mEvent->mFlags.mIsPositionless) {
return 0;
}
return Event::GetClientCoords(mPresContext, mEvent, mEvent->mRefPoint,
mClientPoint).y;
}
int32_t
MouseEvent::OffsetX()
{
if (mEvent->mFlags.mIsPositionless) {
return 0;
}
return Event::GetOffsetCoords(mPresContext, mEvent, mEvent->mRefPoint,
mClientPoint).x;
}
int32_t
MouseEvent::OffsetY()
{
if (mEvent->mFlags.mIsPositionless) {
return 0;
}
return Event::GetOffsetCoords(mPresContext, mEvent, mEvent->mRefPoint,
mClientPoint).y;
}
bool
MouseEvent::AltKey()
{
return mEvent->AsInputEvent()->IsAlt();
}
bool
MouseEvent::CtrlKey()
{
return mEvent->AsInputEvent()->IsControl();
}
bool
MouseEvent::ShiftKey()
{
return mEvent->AsInputEvent()->IsShift();
}
bool
MouseEvent::MetaKey()
{
return mEvent->AsInputEvent()->IsMeta();
}
float
MouseEvent::MozPressure() const
{
return mEvent->AsMouseEventBase()->pressure;
}
bool
MouseEvent::HitCluster() const
{
return mEvent->AsMouseEventBase()->hitCluster;
}
uint16_t
MouseEvent::MozInputSource() const
{
return mEvent->AsMouseEventBase()->inputSource;
}
} // namespace dom
} // namespace mozilla
using namespace mozilla;
using namespace mozilla::dom;
already_AddRefed<MouseEvent>
NS_NewDOMMouseEvent(EventTarget* aOwner,
nsPresContext* aPresContext,
WidgetMouseEvent* aEvent)
{
RefPtr<MouseEvent> it = new MouseEvent(aOwner, aPresContext, aEvent);
return it.forget();
}