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Diffstat (limited to 'dom/events/Touch.cpp')
| -rw-r--r-- | dom/events/Touch.cpp | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/dom/events/Touch.cpp b/dom/events/Touch.cpp new file mode 100644 index 0000000000..8b92403944 --- /dev/null +++ b/dom/events/Touch.cpp @@ -0,0 +1,232 @@ +/* -*- 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/Touch.h" + +#include "mozilla/dom/EventTarget.h" +#include "mozilla/dom/TouchEvent.h" +#include "nsContentUtils.h" +#include "nsIContent.h" + +namespace mozilla::dom { + +// static +already_AddRefed<Touch> Touch::Constructor(const GlobalObject& aGlobal, + const TouchInit& aParam) { + // Annoyingly many parameters, make sure the ordering is the same as in the + // Touch constructor. + RefPtr<Touch> touch = new Touch( + aParam.mTarget, aParam.mIdentifier, aParam.mPageX, aParam.mPageY, + aParam.mScreenX, aParam.mScreenY, aParam.mClientX, aParam.mClientY, + aParam.mRadiusX, aParam.mRadiusY, aParam.mRotationAngle, aParam.mForce); + return touch.forget(); +} + +Touch::Touch(EventTarget* aTarget, int32_t aIdentifier, int32_t aPageX, + int32_t aPageY, int32_t aScreenX, int32_t aScreenY, + int32_t aClientX, int32_t aClientY, int32_t aRadiusX, + int32_t aRadiusY, float aRotationAngle, float aForce) + : mIsTouchEventSuppressed(false) { + mTarget = aTarget; + mOriginalTarget = aTarget; + mIdentifier = aIdentifier; + mPagePoint = CSSIntPoint(aPageX, aPageY); + mScreenPoint = CSSIntPoint(aScreenX, aScreenY); + mClientPoint = CSSIntPoint(aClientX, aClientY); + mRefPoint = LayoutDeviceIntPoint(0, 0); + mPointsInitialized = true; + mRadius.x = aRadiusX; + mRadius.y = aRadiusY; + mRotationAngle = aRotationAngle; + mForce = aForce; + + mChanged = false; + mMessage = 0; + nsJSContext::LikelyShortLivingObjectCreated(); +} + +Touch::Touch(int32_t aIdentifier, LayoutDeviceIntPoint aPoint, + LayoutDeviceIntPoint aRadius, float aRotationAngle, float aForce) + : mIsTouchEventSuppressed(false) { + mIdentifier = aIdentifier; + mPagePoint = CSSIntPoint(0, 0); + mScreenPoint = CSSIntPoint(0, 0); + mClientPoint = CSSIntPoint(0, 0); + mRefPoint = aPoint; + mPointsInitialized = false; + mRadius = aRadius; + mRotationAngle = aRotationAngle; + mForce = aForce; + + mChanged = false; + mMessage = 0; + nsJSContext::LikelyShortLivingObjectCreated(); +} + +Touch::Touch(int32_t aIdentifier, LayoutDeviceIntPoint aPoint, + LayoutDeviceIntPoint aRadius, float aRotationAngle, float aForce, + int32_t aTiltX, int32_t aTiltY, int32_t aTwist) + : Touch(aIdentifier, aPoint, aRadius, aRotationAngle, aForce) { + tiltX = aTiltX; + tiltY = aTiltY; + twist = aTwist; +} + +Touch::Touch(const Touch& aOther) + : mOriginalTarget(aOther.mOriginalTarget), + mTarget(aOther.mTarget), + mRefPoint(aOther.mRefPoint), + mChanged(aOther.mChanged), + mIsTouchEventSuppressed(aOther.mIsTouchEventSuppressed), + mMessage(aOther.mMessage), + mIdentifier(aOther.mIdentifier), + mPagePoint(aOther.mPagePoint), + mClientPoint(aOther.mClientPoint), + mScreenPoint(aOther.mScreenPoint), + mRadius(aOther.mRadius), + mRotationAngle(aOther.mRotationAngle), + mForce(aOther.mForce), + mPointsInitialized(aOther.mPointsInitialized) { + nsJSContext::LikelyShortLivingObjectCreated(); +} + +Touch::~Touch() = default; + +// static +bool Touch::PrefEnabled(JSContext* aCx, JSObject* aGlobal) { + return TouchEvent::PrefEnabled(aCx, aGlobal); +} + +NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Touch, mTarget, mOriginalTarget) + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Touch) + NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY + NS_INTERFACE_MAP_ENTRY(nsISupports) +NS_INTERFACE_MAP_END + +NS_IMPL_CYCLE_COLLECTING_ADDREF(Touch) +NS_IMPL_CYCLE_COLLECTING_RELEASE(Touch) + +static EventTarget* FindFirstNonChromeOnlyAccessContent(EventTarget* aTarget) { + nsIContent* content = nsIContent::FromEventTargetOrNull(aTarget); + if (content && content->ChromeOnlyAccess() && + !nsContentUtils::LegacyIsCallerNativeCode() && + !nsContentUtils::CanAccessNativeAnon()) { + return content->FindFirstNonChromeOnlyAccessContent(); + } + + return aTarget; +} + +EventTarget* Touch::GetTarget() const { + return FindFirstNonChromeOnlyAccessContent(mTarget); +} + +EventTarget* Touch::GetOriginalTarget() const { + return FindFirstNonChromeOnlyAccessContent(mOriginalTarget); +} + +int32_t Touch::ScreenX(CallerType aCallerType) const { + if (nsContentUtils::ShouldResistFingerprinting(aCallerType, GetParentObject(), + RFPTarget::TouchEvents)) { + return ClientX(); + } + + return mScreenPoint.x; +} + +int32_t Touch::ScreenY(CallerType aCallerType) const { + if (nsContentUtils::ShouldResistFingerprinting(aCallerType, GetParentObject(), + RFPTarget::TouchEvents)) { + return ClientY(); + } + + return mScreenPoint.y; +} + +int32_t Touch::RadiusX(CallerType aCallerType) const { + if (nsContentUtils::ShouldResistFingerprinting(aCallerType, GetParentObject(), + RFPTarget::TouchEvents)) { + return 0; + } + + return mRadius.x; +} + +int32_t Touch::RadiusY(CallerType aCallerType) const { + if (nsContentUtils::ShouldResistFingerprinting(aCallerType, GetParentObject(), + RFPTarget::TouchEvents)) { + return 0; + } + + return mRadius.y; +} + +float Touch::RotationAngle(CallerType aCallerType) const { + if (nsContentUtils::ShouldResistFingerprinting(aCallerType, GetParentObject(), + RFPTarget::TouchEvents)) { + return 0.0f; + } + + return mRotationAngle; +} + +float Touch::Force(CallerType aCallerType) const { + if (nsContentUtils::ShouldResistFingerprinting(aCallerType, GetParentObject(), + RFPTarget::TouchEvents)) { + return 0.0f; + } + + return mForce; +} + +void Touch::InitializePoints(nsPresContext* aPresContext, WidgetEvent* aEvent) { + if (mPointsInitialized) { + return; + } + mClientPoint = + Event::GetClientCoords(aPresContext, aEvent, mRefPoint, mClientPoint); + mPagePoint = + Event::GetPageCoords(aPresContext, aEvent, mRefPoint, mClientPoint); + mScreenPoint = + Event::GetScreenCoords(aPresContext, aEvent, mRefPoint).extract(); + mPointsInitialized = true; +} + +void Touch::SetTouchTarget(EventTarget* aTarget) { + mOriginalTarget = aTarget; + mTarget = aTarget; +} + +bool Touch::Equals(Touch* aTouch) const { + return mRefPoint == aTouch->mRefPoint && mForce == aTouch->mForce && + mRotationAngle == aTouch->mRotationAngle && + mRadius.x == aTouch->mRadius.x && mRadius.y == aTouch->mRadius.y; +} + +void Touch::SetSameAs(const Touch* aTouch) { + mRefPoint = aTouch->mRefPoint; + mForce = aTouch->mForce; + mRotationAngle = aTouch->mRotationAngle; + mRadius.x = aTouch->mRadius.x; + mRadius.y = aTouch->mRadius.y; +} + +JSObject* Touch::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) { + return Touch_Binding::Wrap(aCx, this, aGivenProto); +} + +// Parent ourselves to the global of the target. This achieves the desirable +// effects of parenting to the target, but avoids making the touch inaccessible +// when the target happens to be NAC and therefore reflected into the XBL scope. +nsIGlobalObject* Touch::GetParentObject() const { + if (!mOriginalTarget) { + return nullptr; + } + return mOriginalTarget->GetOwnerGlobal(); +} + +} // namespace mozilla::dom |