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-rw-r--r--dom/base/ScreenOrientation.cpp730
1 files changed, 730 insertions, 0 deletions
diff --git a/dom/base/ScreenOrientation.cpp b/dom/base/ScreenOrientation.cpp
new file mode 100644
index 0000000000..6970d7de78
--- /dev/null
+++ b/dom/base/ScreenOrientation.cpp
@@ -0,0 +1,730 @@
+/* -*- 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 "ScreenOrientation.h"
+#include "nsIDocShell.h"
+#include "mozilla/dom/Document.h"
+#include "nsGlobalWindow.h"
+#include "nsSandboxFlags.h"
+#include "nsScreen.h"
+
+#include "mozilla/DOMEventTargetHelper.h"
+#include "mozilla/Hal.h"
+#include "mozilla/Preferences.h"
+
+#include "mozilla/dom/ContentChild.h"
+#include "mozilla/dom/Event.h"
+#include "mozilla/dom/Promise.h"
+#include "mozilla/StaticPrefs_browser.h"
+#include "nsContentUtils.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(ScreenOrientation, DOMEventTargetHelper,
+ mScreen);
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ScreenOrientation)
+NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
+
+NS_IMPL_ADDREF_INHERITED(ScreenOrientation, DOMEventTargetHelper)
+NS_IMPL_RELEASE_INHERITED(ScreenOrientation, DOMEventTargetHelper)
+
+static OrientationType InternalOrientationToType(
+ hal::ScreenOrientation aOrientation) {
+ switch (aOrientation) {
+ case hal::ScreenOrientation::PortraitPrimary:
+ return OrientationType::Portrait_primary;
+ case hal::ScreenOrientation::PortraitSecondary:
+ return OrientationType::Portrait_secondary;
+ case hal::ScreenOrientation::LandscapePrimary:
+ return OrientationType::Landscape_primary;
+ case hal::ScreenOrientation::LandscapeSecondary:
+ return OrientationType::Landscape_secondary;
+ default:
+ MOZ_CRASH("Bad aOrientation value");
+ }
+}
+
+static hal::ScreenOrientation OrientationTypeToInternal(
+ OrientationType aOrientation) {
+ switch (aOrientation) {
+ case OrientationType::Portrait_primary:
+ return hal::ScreenOrientation::PortraitPrimary;
+ case OrientationType::Portrait_secondary:
+ return hal::ScreenOrientation::PortraitSecondary;
+ case OrientationType::Landscape_primary:
+ return hal::ScreenOrientation::LandscapePrimary;
+ case OrientationType::Landscape_secondary:
+ return hal::ScreenOrientation::LandscapeSecondary;
+ default:
+ MOZ_CRASH("Bad aOrientation value");
+ }
+}
+
+ScreenOrientation::ScreenOrientation(nsPIDOMWindowInner* aWindow,
+ nsScreen* aScreen)
+ : DOMEventTargetHelper(aWindow), mScreen(aScreen) {
+ MOZ_ASSERT(aWindow);
+ MOZ_ASSERT(aScreen);
+
+ mAngle = aScreen->GetOrientationAngle();
+ mType = InternalOrientationToType(aScreen->GetOrientationType());
+
+ Document* doc = GetResponsibleDocument();
+ BrowsingContext* bc = doc ? doc->GetBrowsingContext() : nullptr;
+ if (bc && !bc->IsDiscarded() && !bc->InRDMPane()) {
+ MOZ_ALWAYS_SUCCEEDS(bc->SetCurrentOrientation(mType, mAngle));
+ }
+}
+
+ScreenOrientation::~ScreenOrientation() {
+ if (mTriedToLockDeviceOrientation) {
+ UnlockDeviceOrientation();
+ } else {
+ CleanupFullscreenListener();
+ }
+
+ MOZ_ASSERT(!mFullscreenListener);
+}
+
+class ScreenOrientation::FullscreenEventListener final
+ : public nsIDOMEventListener {
+ ~FullscreenEventListener() = default;
+
+ public:
+ FullscreenEventListener() = default;
+
+ NS_DECL_ISUPPORTS
+ NS_DECL_NSIDOMEVENTLISTENER
+};
+
+class ScreenOrientation::VisibleEventListener final
+ : public nsIDOMEventListener {
+ ~VisibleEventListener() = default;
+
+ public:
+ VisibleEventListener() = default;
+
+ NS_DECL_ISUPPORTS
+ NS_DECL_NSIDOMEVENTLISTENER
+};
+
+class ScreenOrientation::LockOrientationTask final : public nsIRunnable {
+ ~LockOrientationTask();
+
+ public:
+ NS_DECL_ISUPPORTS
+ NS_DECL_NSIRUNNABLE
+
+ LockOrientationTask(ScreenOrientation* aScreenOrientation, Promise* aPromise,
+ hal::ScreenOrientation aOrientationLock,
+ Document* aDocument, bool aIsFullscreen);
+
+ protected:
+ bool OrientationLockContains(OrientationType aOrientationType);
+
+ RefPtr<ScreenOrientation> mScreenOrientation;
+ RefPtr<Promise> mPromise;
+ hal::ScreenOrientation mOrientationLock;
+ nsCOMPtr<Document> mDocument;
+ bool mIsFullscreen;
+};
+
+NS_IMPL_ISUPPORTS(ScreenOrientation::LockOrientationTask, nsIRunnable)
+
+ScreenOrientation::LockOrientationTask::LockOrientationTask(
+ ScreenOrientation* aScreenOrientation, Promise* aPromise,
+ hal::ScreenOrientation aOrientationLock, Document* aDocument,
+ bool aIsFullscreen)
+ : mScreenOrientation(aScreenOrientation),
+ mPromise(aPromise),
+ mOrientationLock(aOrientationLock),
+ mDocument(aDocument),
+ mIsFullscreen(aIsFullscreen) {
+ MOZ_ASSERT(aScreenOrientation);
+ MOZ_ASSERT(aPromise);
+ MOZ_ASSERT(aDocument);
+}
+
+ScreenOrientation::LockOrientationTask::~LockOrientationTask() = default;
+
+bool ScreenOrientation::LockOrientationTask::OrientationLockContains(
+ OrientationType aOrientationType) {
+ return bool(mOrientationLock & OrientationTypeToInternal(aOrientationType));
+}
+
+NS_IMETHODIMP
+ScreenOrientation::LockOrientationTask::Run() {
+ if (!mPromise) {
+ return NS_OK;
+ }
+
+ // Step to lock the orientation as defined in the spec.
+ if (mDocument->GetOrientationPendingPromise() != mPromise) {
+ // The document's pending promise is not associated with this task
+ // to lock orientation. There has since been another request to
+ // lock orientation, thus we don't need to do anything. Old promise
+ // should be been rejected.
+ return NS_OK;
+ }
+
+ if (mDocument->Hidden()) {
+ // Active orientation lock is not the document's orientation lock.
+ mPromise->MaybeResolveWithUndefined();
+ mDocument->ClearOrientationPendingPromise();
+ return NS_OK;
+ }
+
+ if (mOrientationLock == hal::ScreenOrientation::None) {
+ mScreenOrientation->UnlockDeviceOrientation();
+ mPromise->MaybeResolveWithUndefined();
+ mDocument->ClearOrientationPendingPromise();
+ return NS_OK;
+ }
+
+ BrowsingContext* bc = mDocument->GetBrowsingContext();
+ if (!bc) {
+ mPromise->MaybeResolveWithUndefined();
+ mDocument->ClearOrientationPendingPromise();
+ return NS_OK;
+ }
+
+ OrientationType previousOrientationType = bc->GetCurrentOrientationType();
+ mScreenOrientation->LockDeviceOrientation(mOrientationLock, mIsFullscreen)
+ ->Then(
+ GetCurrentSerialEventTarget(), __func__,
+ [self = RefPtr{this}, previousOrientationType](
+ const GenericNonExclusivePromise::ResolveOrRejectValue& aValue) {
+ if (self->mPromise->State() != Promise::PromiseState::Pending) {
+ // mPromise is already resolved or rejected by
+ // DispatchChangeEventAndResolvePromise() or
+ // AbortInProcessOrientationPromises().
+ return;
+ }
+
+ if (self->mDocument->GetOrientationPendingPromise() !=
+ self->mPromise) {
+ // mPromise is old promise now and document has new promise by
+ // later `orientation.lock` call. Old promise is already rejected
+ // by AbortInProcessOrientationPromises()
+ return;
+ }
+ if (aValue.IsResolve()) {
+ // LockDeviceOrientation won't change orientation, so change
+ // event isn't fired.
+ if (BrowsingContext* bc = self->mDocument->GetBrowsingContext()) {
+ OrientationType currentOrientationType =
+ bc->GetCurrentOrientationType();
+ if ((previousOrientationType == currentOrientationType &&
+ self->OrientationLockContains(currentOrientationType)) ||
+ (self->mOrientationLock ==
+ hal::ScreenOrientation::Default &&
+ bc->GetCurrentOrientationAngle() == 0)) {
+ // Orientation lock will not cause an orientation change, so
+ // we need to manually resolve the promise here.
+ self->mPromise->MaybeResolveWithUndefined();
+ self->mDocument->ClearOrientationPendingPromise();
+ }
+ }
+ return;
+ }
+ self->mPromise->MaybeReject(aValue.RejectValue());
+ self->mDocument->ClearOrientationPendingPromise();
+ });
+
+ return NS_OK;
+}
+
+already_AddRefed<Promise> ScreenOrientation::Lock(
+ OrientationLockType aOrientation, ErrorResult& aRv) {
+ hal::ScreenOrientation orientation = hal::ScreenOrientation::None;
+
+ switch (aOrientation) {
+ case OrientationLockType::Any:
+ orientation = hal::ScreenOrientation::PortraitPrimary |
+ hal::ScreenOrientation::PortraitSecondary |
+ hal::ScreenOrientation::LandscapePrimary |
+ hal::ScreenOrientation::LandscapeSecondary;
+ break;
+ case OrientationLockType::Natural:
+ orientation |= hal::ScreenOrientation::Default;
+ break;
+ case OrientationLockType::Landscape:
+ orientation = hal::ScreenOrientation::LandscapePrimary |
+ hal::ScreenOrientation::LandscapeSecondary;
+ break;
+ case OrientationLockType::Portrait:
+ orientation = hal::ScreenOrientation::PortraitPrimary |
+ hal::ScreenOrientation::PortraitSecondary;
+ break;
+ case OrientationLockType::Portrait_primary:
+ orientation = hal::ScreenOrientation::PortraitPrimary;
+ break;
+ case OrientationLockType::Portrait_secondary:
+ orientation = hal::ScreenOrientation::PortraitSecondary;
+ break;
+ case OrientationLockType::Landscape_primary:
+ orientation = hal::ScreenOrientation::LandscapePrimary;
+ break;
+ case OrientationLockType::Landscape_secondary:
+ orientation = hal::ScreenOrientation::LandscapeSecondary;
+ break;
+ default:
+ NS_WARNING("Unexpected orientation type");
+ aRv.Throw(NS_ERROR_UNEXPECTED);
+ return nullptr;
+ }
+
+ return LockInternal(orientation, aRv);
+}
+
+void ScreenOrientation::AbortInProcessOrientationPromises(
+ BrowsingContext* aBrowsingContext) {
+ MOZ_ASSERT(aBrowsingContext);
+
+ aBrowsingContext = aBrowsingContext->Top();
+ aBrowsingContext->PreOrderWalk([](BrowsingContext* aContext) {
+ nsIDocShell* docShell = aContext->GetDocShell();
+ if (docShell) {
+ Document* doc = docShell->GetDocument();
+ if (doc) {
+ Promise* promise = doc->GetOrientationPendingPromise();
+ if (promise) {
+ promise->MaybeReject(NS_ERROR_DOM_ABORT_ERR);
+ doc->ClearOrientationPendingPromise();
+ }
+ }
+ }
+ });
+}
+
+already_AddRefed<Promise> ScreenOrientation::LockInternal(
+ hal::ScreenOrientation aOrientation, ErrorResult& aRv) {
+ // Steps to apply an orientation lock as defined in spec.
+
+ Document* doc = GetResponsibleDocument();
+ if (NS_WARN_IF(!doc)) {
+ aRv.Throw(NS_ERROR_UNEXPECTED);
+ return nullptr;
+ }
+
+ nsCOMPtr<nsPIDOMWindowInner> owner = GetOwner();
+ if (NS_WARN_IF(!owner)) {
+ aRv.Throw(NS_ERROR_UNEXPECTED);
+ return nullptr;
+ }
+
+ nsCOMPtr<nsIDocShell> docShell = owner->GetDocShell();
+ if (NS_WARN_IF(!docShell)) {
+ aRv.Throw(NS_ERROR_UNEXPECTED);
+ return nullptr;
+ }
+
+ nsCOMPtr<nsIGlobalObject> go = do_QueryInterface(owner);
+ MOZ_ASSERT(go);
+ RefPtr<Promise> p = Promise::Create(go, aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ // Step 3.
+ // If document has the sandboxed orientation lock browsing context flag set,
+ // or doesn't meet the pre-lock conditions, or locking would be a security
+ // risk, return a promise rejected with a "SecurityError" DOMException and
+ // abort these steps.
+
+ LockPermission perm = GetLockOrientationPermission(true);
+ if (perm == LOCK_DENIED) {
+ p->MaybeReject(NS_ERROR_DOM_SECURITY_ERR);
+ return p.forget();
+ }
+
+ // Step 4.
+ // If the user agent does not support locking the screen orientation to
+ // orientation, return a promise rejected with a "NotSupportedError"
+ // DOMException and abort these steps.
+
+#if !defined(MOZ_WIDGET_ANDROID) && !defined(XP_WIN)
+ // User agent does not support locking the screen orientation.
+ p->MaybeReject(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
+ return p.forget();
+#else
+ // Bypass locking screen orientation if preference is false
+ if (!StaticPrefs::dom_screenorientation_allow_lock()) {
+ p->MaybeReject(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
+ return p.forget();
+ }
+
+ RefPtr<BrowsingContext> bc = docShell->GetBrowsingContext();
+ bc = bc ? bc->Top() : nullptr;
+ if (!bc) {
+ aRv.Throw(NS_ERROR_UNEXPECTED);
+ return nullptr;
+ }
+
+ bc->SetOrientationLock(aOrientation, aRv);
+ if (aRv.Failed()) {
+ return nullptr;
+ }
+
+ AbortInProcessOrientationPromises(bc);
+ dom::ContentChild::GetSingleton()->SendAbortOtherOrientationPendingPromises(
+ bc);
+
+ if (!doc->SetOrientationPendingPromise(p)) {
+ p->MaybeReject(NS_ERROR_DOM_SECURITY_ERR);
+ return p.forget();
+ }
+
+ nsCOMPtr<nsIRunnable> lockOrientationTask = new LockOrientationTask(
+ this, p, aOrientation, doc, perm == FULLSCREEN_LOCK_ALLOWED);
+ aRv = NS_DispatchToMainThread(lockOrientationTask);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ return p.forget();
+#endif
+}
+
+RefPtr<GenericNonExclusivePromise> ScreenOrientation::LockDeviceOrientation(
+ hal::ScreenOrientation aOrientation, bool aIsFullscreen) {
+ if (!GetOwner()) {
+ return GenericNonExclusivePromise::CreateAndReject(NS_ERROR_DOM_ABORT_ERR,
+ __func__);
+ }
+
+ nsCOMPtr<EventTarget> target = GetOwner()->GetDoc();
+ // We need to register a listener so we learn when we leave fullscreen
+ // and when we will have to unlock the screen.
+ // This needs to be done before LockScreenOrientation call to make sure
+ // the locking can be unlocked.
+ if (aIsFullscreen && !target) {
+ return GenericNonExclusivePromise::CreateAndReject(NS_ERROR_DOM_ABORT_ERR,
+ __func__);
+ }
+
+ // We are fullscreen and lock has been accepted.
+ if (aIsFullscreen) {
+ if (!mFullscreenListener) {
+ mFullscreenListener = new FullscreenEventListener();
+ }
+
+ nsresult rv = target->AddSystemEventListener(u"fullscreenchange"_ns,
+ mFullscreenListener,
+ /* aUseCapture = */ true);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return GenericNonExclusivePromise::CreateAndReject(NS_ERROR_DOM_ABORT_ERR,
+ __func__);
+ }
+ }
+
+ mTriedToLockDeviceOrientation = true;
+ return hal::LockScreenOrientation(aOrientation);
+}
+
+void ScreenOrientation::Unlock(ErrorResult& aRv) {
+ if (RefPtr<Promise> p = LockInternal(hal::ScreenOrientation::None, aRv)) {
+ // Don't end up reporting unhandled promise rejection since
+ // screen.orientation.unlock doesn't return promise.
+ MOZ_ALWAYS_TRUE(p->SetAnyPromiseIsHandled());
+ }
+}
+
+void ScreenOrientation::UnlockDeviceOrientation() {
+ hal::UnlockScreenOrientation();
+ CleanupFullscreenListener();
+}
+
+void ScreenOrientation::CleanupFullscreenListener() {
+ if (!mFullscreenListener || !GetOwner()) {
+ mFullscreenListener = nullptr;
+ return;
+ }
+
+ // Remove event listener in case of fullscreen lock.
+ if (nsCOMPtr<EventTarget> target = GetOwner()->GetDoc()) {
+ target->RemoveSystemEventListener(u"fullscreenchange"_ns,
+ mFullscreenListener,
+ /* useCapture */ true);
+ }
+
+ mFullscreenListener = nullptr;
+}
+
+OrientationType ScreenOrientation::DeviceType(CallerType aCallerType) const {
+ return nsContentUtils::ResistFingerprinting(aCallerType)
+ ? OrientationType::Landscape_primary
+ : mType;
+}
+
+uint16_t ScreenOrientation::DeviceAngle(CallerType aCallerType) const {
+ return nsContentUtils::ResistFingerprinting(aCallerType) ? 0 : mAngle;
+}
+
+OrientationType ScreenOrientation::GetType(CallerType aCallerType,
+ ErrorResult& aRv) const {
+ if (nsContentUtils::ResistFingerprinting(aCallerType)) {
+ return OrientationType::Landscape_primary;
+ }
+
+ Document* doc = GetResponsibleDocument();
+ BrowsingContext* bc = doc ? doc->GetBrowsingContext() : nullptr;
+ if (!bc) {
+ aRv.Throw(NS_ERROR_UNEXPECTED);
+ return OrientationType::Portrait_primary;
+ }
+
+ return bc->GetCurrentOrientationType();
+}
+
+uint16_t ScreenOrientation::GetAngle(CallerType aCallerType,
+ ErrorResult& aRv) const {
+ if (nsContentUtils::ResistFingerprinting(aCallerType)) {
+ return 0;
+ }
+
+ Document* doc = GetResponsibleDocument();
+ BrowsingContext* bc = doc ? doc->GetBrowsingContext() : nullptr;
+ if (!bc) {
+ aRv.Throw(NS_ERROR_UNEXPECTED);
+ return 0;
+ }
+
+ return bc->GetCurrentOrientationAngle();
+}
+
+ScreenOrientation::LockPermission
+ScreenOrientation::GetLockOrientationPermission(bool aCheckSandbox) const {
+ nsCOMPtr<nsPIDOMWindowInner> owner = GetOwner();
+ if (!owner) {
+ return LOCK_DENIED;
+ }
+
+ // Chrome can always lock the screen orientation.
+ if (owner->GetBrowsingContext()->IsChrome()) {
+ return LOCK_ALLOWED;
+ }
+
+ nsCOMPtr<Document> doc = owner->GetDoc();
+ if (!doc || doc->Hidden()) {
+ return LOCK_DENIED;
+ }
+
+ // Sandboxed without "allow-orientation-lock"
+ if (aCheckSandbox && doc->GetSandboxFlags() & SANDBOXED_ORIENTATION_LOCK) {
+ return LOCK_DENIED;
+ }
+
+ if (Preferences::GetBool(
+ "dom.screenorientation.testing.non_fullscreen_lock_allow", false)) {
+ return LOCK_ALLOWED;
+ }
+
+ // Other content must be fullscreen in order to lock orientation.
+ return doc->Fullscreen() ? FULLSCREEN_LOCK_ALLOWED : LOCK_DENIED;
+}
+
+Document* ScreenOrientation::GetResponsibleDocument() const {
+ nsCOMPtr<nsPIDOMWindowInner> owner = GetOwner();
+ if (!owner) {
+ return nullptr;
+ }
+
+ return owner->GetDoc();
+}
+
+void ScreenOrientation::MaybeChanged() {
+ if (ShouldResistFingerprinting()) {
+ return;
+ }
+
+ Document* doc = GetResponsibleDocument();
+ BrowsingContext* bc = doc ? doc->GetBrowsingContext() : nullptr;
+ if (!bc) {
+ return;
+ }
+
+ hal::ScreenOrientation orientation = mScreen->GetOrientationType();
+ if (orientation != hal::ScreenOrientation::PortraitPrimary &&
+ orientation != hal::ScreenOrientation::PortraitSecondary &&
+ orientation != hal::ScreenOrientation::LandscapePrimary &&
+ orientation != hal::ScreenOrientation::LandscapeSecondary) {
+ // The platform may notify of some other values from
+ // an orientation lock, but we only care about real
+ // changes to screen orientation which result in one of
+ // the values we care about.
+ return;
+ }
+
+ OrientationType previousOrientation = mType;
+ mAngle = mScreen->GetOrientationAngle();
+ mType = InternalOrientationToType(orientation);
+
+ DebugOnly<nsresult> rv;
+ if (mScreen && mType != previousOrientation) {
+ // Use of mozorientationchange is deprecated.
+ rv = mScreen->DispatchTrustedEvent(u"mozorientationchange"_ns);
+ NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "DispatchTrustedEvent failed");
+ }
+
+ if (doc->Hidden() && !mVisibleListener) {
+ mVisibleListener = new VisibleEventListener();
+ rv = doc->AddSystemEventListener(u"visibilitychange"_ns, mVisibleListener,
+ /* aUseCapture = */ true);
+ NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "AddSystemEventListener failed");
+ return;
+ }
+
+ if (mType != bc->GetCurrentOrientationType()) {
+ rv = bc->SetCurrentOrientation(mType, mAngle);
+ NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "SetCurrentOrientation failed");
+
+ nsCOMPtr<nsIRunnable> runnable = DispatchChangeEventAndResolvePromise();
+ rv = NS_DispatchToMainThread(runnable);
+ NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "NS_DispatchToMainThread failed");
+ }
+}
+
+void ScreenOrientation::UpdateActiveOrientationLock(
+ hal::ScreenOrientation aOrientation) {
+ if (aOrientation == hal::ScreenOrientation::None) {
+ hal::UnlockScreenOrientation();
+ } else {
+ hal::LockScreenOrientation(aOrientation)
+ ->Then(
+ GetMainThreadSerialEventTarget(), __func__,
+ [](const GenericNonExclusivePromise::ResolveOrRejectValue& aValue) {
+ NS_WARNING_ASSERTION(aValue.IsResolve(),
+ "hal::LockScreenOrientation failed");
+ });
+ }
+}
+
+nsCOMPtr<nsIRunnable>
+ScreenOrientation::DispatchChangeEventAndResolvePromise() {
+ RefPtr<Document> doc = GetResponsibleDocument();
+ RefPtr<ScreenOrientation> self = this;
+ return NS_NewRunnableFunction(
+ "dom::ScreenOrientation::DispatchChangeEvent", [self, doc]() {
+ DebugOnly<nsresult> rv = self->DispatchTrustedEvent(u"change"_ns);
+ NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "DispatchTrustedEvent failed");
+ if (doc) {
+ Promise* pendingPromise = doc->GetOrientationPendingPromise();
+ if (pendingPromise) {
+ pendingPromise->MaybeResolveWithUndefined();
+ doc->ClearOrientationPendingPromise();
+ }
+ }
+ });
+}
+
+JSObject* ScreenOrientation::WrapObject(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) {
+ return ScreenOrientation_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+bool ScreenOrientation::ShouldResistFingerprinting() const {
+ if (nsContentUtils::ShouldResistFingerprinting(
+ "Legacy RFP function called to avoid observed hangs in the code "
+ "below if we can avoid it.")) {
+ bool resist = false;
+ if (nsCOMPtr<nsPIDOMWindowInner> owner = GetOwner()) {
+ resist = nsContentUtils::ShouldResistFingerprinting(owner->GetDocShell());
+ }
+ return resist;
+ }
+ return false;
+}
+
+NS_IMPL_ISUPPORTS(ScreenOrientation::VisibleEventListener, nsIDOMEventListener)
+
+NS_IMETHODIMP
+ScreenOrientation::VisibleEventListener::HandleEvent(Event* aEvent) {
+ // Document may have become visible, if the page is visible, run the steps
+ // following the "now visible algorithm" as specified.
+ MOZ_ASSERT(aEvent->GetCurrentTarget());
+ nsCOMPtr<nsINode> eventTargetNode =
+ nsINode::FromEventTarget(aEvent->GetCurrentTarget());
+ if (!eventTargetNode || !eventTargetNode->IsDocument() ||
+ eventTargetNode->AsDocument()->Hidden()) {
+ return NS_OK;
+ }
+
+ RefPtr<Document> doc = eventTargetNode->AsDocument();
+ auto* win = nsGlobalWindowInner::Cast(doc->GetInnerWindow());
+ if (!win) {
+ return NS_OK;
+ }
+
+ ErrorResult rv;
+ nsScreen* screen = win->GetScreen(rv);
+ if (NS_WARN_IF(rv.Failed())) {
+ return rv.StealNSResult();
+ }
+
+ MOZ_ASSERT(screen);
+ ScreenOrientation* orientation = screen->Orientation();
+ MOZ_ASSERT(orientation);
+
+ doc->RemoveSystemEventListener(u"visibilitychange"_ns, this, true);
+
+ BrowsingContext* bc = doc->GetBrowsingContext();
+ if (bc && bc->GetCurrentOrientationType() !=
+ orientation->DeviceType(CallerType::System)) {
+ nsresult result =
+ bc->SetCurrentOrientation(orientation->DeviceType(CallerType::System),
+ orientation->DeviceAngle(CallerType::System));
+ NS_ENSURE_SUCCESS(result, result);
+
+ nsCOMPtr<nsIRunnable> runnable =
+ orientation->DispatchChangeEventAndResolvePromise();
+ rv = NS_DispatchToMainThread(runnable);
+ if (NS_WARN_IF(rv.Failed())) {
+ return rv.StealNSResult();
+ }
+ }
+
+ return NS_OK;
+}
+
+NS_IMPL_ISUPPORTS(ScreenOrientation::FullscreenEventListener,
+ nsIDOMEventListener)
+
+NS_IMETHODIMP
+ScreenOrientation::FullscreenEventListener::HandleEvent(Event* aEvent) {
+#ifdef DEBUG
+ nsAutoString eventType;
+ aEvent->GetType(eventType);
+
+ MOZ_ASSERT(eventType.EqualsLiteral("fullscreenchange"));
+#endif
+
+ EventTarget* target = aEvent->GetCurrentTarget();
+ MOZ_ASSERT(target);
+ MOZ_ASSERT(target->IsNode());
+ RefPtr<Document> doc = nsINode::FromEventTarget(target)->AsDocument();
+ MOZ_ASSERT(doc);
+
+ // We have to make sure that the event we got is the event sent when
+ // fullscreen is disabled because we could get one when fullscreen
+ // got enabled if the lock call is done at the same moment.
+ if (doc->Fullscreen()) {
+ return NS_OK;
+ }
+
+ BrowsingContext* bc = doc->GetBrowsingContext();
+ bc = bc ? bc->Top() : nullptr;
+ if (bc) {
+ bc->SetOrientationLock(hal::ScreenOrientation::None, IgnoreErrors());
+ }
+
+ hal::UnlockScreenOrientation();
+
+ target->RemoveSystemEventListener(u"fullscreenchange"_ns, this, true);
+ return NS_OK;
+}