Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 203 insertions, 0 deletions

diff --git a/dom/presentation/PresentationAvailability.cpp b/dom/presentation/PresentationAvailability.cpp
new file mode 100644
index 0000000000..ba816f975a
--- /dev/null
+++ b/dom/presentation/PresentationAvailability.cpp
@@ -0,0 +1,203 @@
+/* -*- 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 "PresentationAvailability.h"
+
+#include "mozilla/dom/PresentationAvailabilityBinding.h"
+#include "mozilla/dom/Promise.h"
+#include "mozilla/Logging.h"
+#include "mozilla/Unused.h"
+#include "nsContentUtils.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsIPresentationService.h"
+#include "nsServiceManagerUtils.h"
+#include "AvailabilityCollection.h"
+#include "PresentationLog.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(PresentationAvailability)
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(PresentationAvailability,
+                                                  DOMEventTargetHelper)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPromises)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(PresentationAvailability,
+                                                DOMEventTargetHelper)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mPromises);
+  tmp->Shutdown();
+  NS_IMPL_CYCLE_COLLECTION_UNLINK_WEAK_PTR
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_ADDREF_INHERITED(PresentationAvailability, DOMEventTargetHelper)
+NS_IMPL_RELEASE_INHERITED(PresentationAvailability, DOMEventTargetHelper)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PresentationAvailability)
+  NS_INTERFACE_MAP_ENTRY(nsIPresentationAvailabilityListener)
+NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
+
+/* static */
+already_AddRefed<PresentationAvailability> PresentationAvailability::Create(
+    nsPIDOMWindowInner* aWindow, const nsTArray<nsString>& aUrls,
+    RefPtr<Promise>& aPromise) {
+  RefPtr<PresentationAvailability> availability =
+      new PresentationAvailability(aWindow, aUrls);
+  return NS_WARN_IF(!availability->Init(aPromise)) ? nullptr
+                                                   : availability.forget();
+}
+
+PresentationAvailability::PresentationAvailability(
+    nsPIDOMWindowInner* aWindow, const nsTArray<nsString>& aUrls)
+    : DOMEventTargetHelper(aWindow), mIsAvailable(false), mUrls(aUrls.Clone()) {
+  for (uint32_t i = 0; i < mUrls.Length(); ++i) {
+    mAvailabilityOfUrl.AppendElement(false);
+  }
+}
+
+PresentationAvailability::~PresentationAvailability() { Shutdown(); }
+
+bool PresentationAvailability::Init(RefPtr<Promise>& aPromise) {
+  nsCOMPtr<nsIPresentationService> service =
+      do_GetService(PRESENTATION_SERVICE_CONTRACTID);
+  if (NS_WARN_IF(!service)) {
+    return false;
+  }
+
+  nsresult rv = service->RegisterAvailabilityListener(mUrls, this);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    // If the user agent is unable to monitor available device,
+    // Resolve promise with |value| set to false.
+    mIsAvailable = false;
+    aPromise->MaybeResolve(this);
+    return true;
+  }
+
+  EnqueuePromise(aPromise);
+
+  AvailabilityCollection* collection = AvailabilityCollection::GetSingleton();
+  if (collection) {
+    collection->Add(this);
+  }
+
+  return true;
+}
+
+void PresentationAvailability::Shutdown() {
+  AvailabilityCollection* collection = AvailabilityCollection::GetSingleton();
+  if (collection) {
+    collection->Remove(this);
+  }
+
+  nsCOMPtr<nsIPresentationService> service =
+      do_GetService(PRESENTATION_SERVICE_CONTRACTID);
+  if (NS_WARN_IF(!service)) {
+    return;
+  }
+
+  Unused << NS_WARN_IF(
+      NS_FAILED(service->UnregisterAvailabilityListener(mUrls, this)));
+}
+
+/* virtual */
+void PresentationAvailability::DisconnectFromOwner() {
+  Shutdown();
+  DOMEventTargetHelper::DisconnectFromOwner();
+}
+
+/* virtual */
+JSObject* PresentationAvailability::WrapObject(
+    JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
+  return PresentationAvailability_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+bool PresentationAvailability::Equals(const uint64_t aWindowID,
+                                      const nsTArray<nsString>& aUrls) const {
+  if (GetOwner() && GetOwner()->WindowID() == aWindowID &&
+      mUrls.Length() == aUrls.Length()) {
+    for (const auto& url : aUrls) {
+      if (!mUrls.Contains(url)) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  return false;
+}
+
+bool PresentationAvailability::IsCachedValueReady() {
+  // All pending promises will be solved when cached value is ready and
+  // no promise should be enqueued afterward.
+  return mPromises.IsEmpty();
+}
+
+void PresentationAvailability::EnqueuePromise(RefPtr<Promise>& aPromise) {
+  mPromises.AppendElement(aPromise);
+}
+
+bool PresentationAvailability::Value() const {
+  if (nsContentUtils::ShouldResistFingerprinting()) {
+    return false;
+  }
+
+  return mIsAvailable;
+}
+
+NS_IMETHODIMP
+PresentationAvailability::NotifyAvailableChange(
+    const nsTArray<nsString>& aAvailabilityUrls, bool aIsAvailable) {
+  bool available = false;
+  for (uint32_t i = 0; i < mUrls.Length(); ++i) {
+    if (aAvailabilityUrls.Contains(mUrls[i])) {
+      mAvailabilityOfUrl[i] = aIsAvailable;
+    }
+    available |= mAvailabilityOfUrl[i];
+  }
+
+  return NS_DispatchToCurrentThread(NewRunnableMethod<bool>(
+      "dom::PresentationAvailability::UpdateAvailabilityAndDispatchEvent", this,
+      &PresentationAvailability::UpdateAvailabilityAndDispatchEvent,
+      available));
+}
+
+void PresentationAvailability::UpdateAvailabilityAndDispatchEvent(
+    bool aIsAvailable) {
+  PRES_DEBUG("%s\n", __func__);
+  bool isChanged = (aIsAvailable != mIsAvailable);
+
+  mIsAvailable = aIsAvailable;
+
+  if (!mPromises.IsEmpty()) {
+    // Use the first availability change notification to resolve promise.
+    do {
+      nsTArray<RefPtr<Promise>> promises = std::move(mPromises);
+
+      if (nsContentUtils::ShouldResistFingerprinting()) {
+        continue;
+      }
+
+      for (auto& promise : promises) {
+        promise->MaybeResolve(this);
+      }
+      // more promises may have been added to mPromises, at least in theory
+    } while (!mPromises.IsEmpty());
+
+    return;
+  }
+
+  if (nsContentUtils::ShouldResistFingerprinting()) {
+    return;
+  }
+
+  if (isChanged) {
+    Unused << NS_WARN_IF(NS_FAILED(DispatchTrustedEvent(u"change"_ns)));
+  }
+}
+
+}  // namespace dom
+}  // namespace mozilla