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-rw-r--r--dom/events/Touch.cpp233
1 files changed, 233 insertions, 0 deletions
diff --git a/dom/events/Touch.cpp b/dom/events/Touch.cpp
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+++ b/dom/events/Touch.cpp
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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
+ * 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 "nsGlobalWindow.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