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/* -*- 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
#include "mozilla/dom/MouseEvent.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/BasePrincipal.h"
#include "nsContentUtils.h"
#include "nsIContent.h"
#include "nsIScreenManager.h"
#include "prtime.h"
namespace mozilla::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->mRefPoint = LayoutDeviceIntPoint(0, 0);
mouseEvent->mInputSource = MouseEvent_Binding::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->mButton = aButton;
mouseEventBase->InitBasicModifiers(aCtrlKey, aAltKey, aShiftKey,
aMetaKey);
mDefaultClientPoint.x = aClientX;
mDefaultClientPoint.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()->mButtons = aParam.mButtons;
mMovementPoint.x = aParam.mMovementX;
mMovementPoint.y = aParam.mMovementY;
}
already_AddRefed<MouseEvent> MouseEvent::Constructor(
const GlobalObject& aGlobal, const nsAString& aType,
const MouseEventInit& aParam) {
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->mPressure = aPressure;
mouseEventBase->mInputSource = aInputSource;
}
void MouseEvent::PreventClickEvent() {
if (WidgetMouseEvent* mouseEvent = mEvent->AsMouseEvent()) {
mouseEvent->mClickEventPrevented = true;
}
}
bool MouseEvent::ClickEventPrevented() {
if (WidgetMouseEvent* mouseEvent = mEvent->AsMouseEvent()) {
return mouseEvent->mClickEventPrevented;
}
return false;
}
int16_t MouseEvent::Button() {
switch (mEvent->mClass) {
case eMouseEventClass:
case eMouseScrollEventClass:
case eWheelEventClass:
case eDragEventClass:
case ePointerEventClass:
case eSimpleGestureEventClass:
return mEvent->AsMouseEventBase()->mButton;
default:
NS_WARNING("Tried to get mouse mButton for non-mouse event!");
return MouseButton::ePrimary;
}
}
uint16_t MouseEvent::Buttons() {
switch (mEvent->mClass) {
case eMouseEventClass:
case eMouseScrollEventClass:
case eWheelEventClass:
case eDragEventClass:
case ePointerEventClass:
case eSimpleGestureEventClass:
return mEvent->AsMouseEventBase()->mButtons;
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);
}
CSSIntPoint MouseEvent::ScreenPoint(CallerType aCallerType) const {
if (mEvent->mFlags.mIsPositionless) {
return {};
}
if (nsContentUtils::ShouldResistFingerprinting(
aCallerType, GetParentObject(), RFPTarget::MouseEventScreenPoint)) {
// 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));
}
return Event::GetScreenCoords(mPresContext, mEvent, mEvent->mRefPoint)
.extract();
}
LayoutDeviceIntPoint MouseEvent::ScreenPointLayoutDevicePix() const {
const CSSIntPoint point = ScreenPoint(CallerType::System);
auto scale = mPresContext ? mPresContext->CSSToDevPixelScale()
: CSSToLayoutDeviceScale();
return LayoutDeviceIntPoint::Round(point * scale);
}
DesktopIntPoint MouseEvent::ScreenPointDesktopPix() const {
const CSSIntPoint point = ScreenPoint(CallerType::System);
auto scale =
mPresContext
? mPresContext->CSSToDevPixelScale() /
mPresContext->DeviceContext()->GetDesktopToDeviceScale()
: CSSToDesktopScale();
return DesktopIntPoint::Round(point * scale);
}
already_AddRefed<nsIScreen> MouseEvent::GetScreen() {
nsCOMPtr<nsIScreenManager> screenMgr =
do_GetService("@mozilla.org/gfx/screenmanager;1");
if (!screenMgr) {
return nullptr;
}
return screenMgr->ScreenForRect(
DesktopIntRect(ScreenPointDesktopPix(), DesktopIntSize(1, 1)));
}
CSSIntPoint MouseEvent::PagePoint() const {
if (mEvent->mFlags.mIsPositionless) {
return {};
}
if (mPrivateDataDuplicated) {
return mPagePoint;
}
return Event::GetPageCoords(mPresContext, mEvent, mEvent->mRefPoint,
mDefaultClientPoint);
}
CSSIntPoint MouseEvent::ClientPoint() const {
if (mEvent->mFlags.mIsPositionless) {
return {};
}
return Event::GetClientCoords(mPresContext, mEvent, mEvent->mRefPoint,
mDefaultClientPoint);
}
CSSIntPoint MouseEvent::OffsetPoint() const {
if (mEvent->mFlags.mIsPositionless) {
return {};
}
return Event::GetOffsetCoords(mPresContext, mEvent, mEvent->mRefPoint,
mDefaultClientPoint);
}
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()->mPressure;
}
uint16_t MouseEvent::InputSource() const {
return mEvent->AsMouseEventBase()->mInputSource;
}
} // namespace mozilla::dom
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();
}