Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

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

1 files changed, 335 insertions, 0 deletions

diff --git a/dom/media/mediasession/MediaSession.cpp b/dom/media/mediasession/MediaSession.cpp
new file mode 100644
index 0000000000..e55fa28d96
--- /dev/null
+++ b/dom/media/mediasession/MediaSession.cpp
@@ -0,0 +1,335 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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/BrowsingContext.h"
+#include "mozilla/dom/ContentMediaController.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/MediaSession.h"
+#include "mozilla/dom/MediaControlUtils.h"
+#include "mozilla/dom/WindowContext.h"
+#include "mozilla/EnumeratedArrayCycleCollection.h"
+
+// avoid redefined macro in unified build
+#undef LOG
+#define LOG(msg, ...)                        \
+  MOZ_LOG(gMediaControlLog, LogLevel::Debug, \
+          ("MediaSession=%p, " msg, this, ##__VA_ARGS__))
+
+namespace mozilla::dom {
+
+// We don't use NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE because we need to
+// unregister MediaSession from document's activity listeners.
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(MediaSession)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(MediaSession)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mParent)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMediaMetadata)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mActionHandlers)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDoc)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(MediaSession)
+  tmp->Shutdown();
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mParent)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mMediaMetadata)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mActionHandlers)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mDoc)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+NS_IMPL_CYCLE_COLLECTING_ADDREF(MediaSession)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(MediaSession)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaSession)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+  NS_INTERFACE_MAP_ENTRY(nsIDocumentActivity)
+NS_INTERFACE_MAP_END
+
+MediaSession::MediaSession(nsPIDOMWindowInner* aParent)
+    : mParent(aParent), mDoc(mParent->GetExtantDoc()) {
+  MOZ_ASSERT(mParent);
+  MOZ_ASSERT(mDoc);
+  mDoc->RegisterActivityObserver(this);
+  if (mDoc->IsCurrentActiveDocument()) {
+    SetMediaSessionDocStatus(SessionDocStatus::eActive);
+  }
+}
+
+void MediaSession::Shutdown() {
+  if (mDoc) {
+    mDoc->UnregisterActivityObserver(this);
+  }
+  if (mParent) {
+    SetMediaSessionDocStatus(SessionDocStatus::eInactive);
+  }
+}
+
+void MediaSession::NotifyOwnerDocumentActivityChanged() {
+  const bool isDocActive = mDoc->IsCurrentActiveDocument();
+  LOG("Document activity changed, isActive=%d", isDocActive);
+  if (isDocActive) {
+    SetMediaSessionDocStatus(SessionDocStatus::eActive);
+  } else {
+    SetMediaSessionDocStatus(SessionDocStatus::eInactive);
+  }
+}
+
+void MediaSession::SetMediaSessionDocStatus(SessionDocStatus aState) {
+  if (mSessionDocState == aState) {
+    return;
+  }
+  mSessionDocState = aState;
+  NotifyMediaSessionDocStatus(mSessionDocState);
+}
+
+nsPIDOMWindowInner* MediaSession::GetParentObject() const { return mParent; }
+
+JSObject* MediaSession::WrapObject(JSContext* aCx,
+                                   JS::Handle<JSObject*> aGivenProto) {
+  return MediaSession_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+MediaMetadata* MediaSession::GetMetadata() const { return mMediaMetadata; }
+
+void MediaSession::SetMetadata(MediaMetadata* aMetadata) {
+  mMediaMetadata = aMetadata;
+  NotifyMetadataUpdated();
+}
+
+void MediaSession::SetPlaybackState(
+    const MediaSessionPlaybackState& aPlaybackState) {
+  if (mDeclaredPlaybackState == aPlaybackState) {
+    return;
+  }
+  mDeclaredPlaybackState = aPlaybackState;
+  NotifyPlaybackStateUpdated();
+}
+
+MediaSessionPlaybackState MediaSession::PlaybackState() const {
+  return mDeclaredPlaybackState;
+}
+
+void MediaSession::SetActionHandler(MediaSessionAction aAction,
+                                    MediaSessionActionHandler* aHandler) {
+  MOZ_ASSERT(size_t(aAction) < ArrayLength(mActionHandlers));
+  // If the media session changes its supported action, then we would propagate
+  // this information to the chrome process in order to run the media session
+  // actions update algorithm.
+  // https://w3c.github.io/mediasession/#supported-media-session-actions
+  RefPtr<MediaSessionActionHandler>& hanlder = mActionHandlers[aAction];
+  if (!hanlder && aHandler) {
+    NotifyEnableSupportedAction(aAction);
+  } else if (hanlder && !aHandler) {
+    NotifyDisableSupportedAction(aAction);
+  }
+  mActionHandlers[aAction] = aHandler;
+}
+
+MediaSessionActionHandler* MediaSession::GetActionHandler(
+    MediaSessionAction aAction) const {
+  MOZ_ASSERT(size_t(aAction) < ArrayLength(mActionHandlers));
+  return mActionHandlers[aAction];
+}
+
+void MediaSession::SetPositionState(const MediaPositionState& aState,
+                                    ErrorResult& aRv) {
+  // https://w3c.github.io/mediasession/#dom-mediasession-setpositionstate
+  // If the state is an empty dictionary then clear the position state.
+  if (!aState.IsAnyMemberPresent()) {
+    mPositionState.reset();
+    return;
+  }
+
+  // If the duration is not present, throw a TypeError.
+  if (!aState.mDuration.WasPassed()) {
+    return aRv.ThrowTypeError("Duration is not present");
+  }
+
+  // If the duration is negative, throw a TypeError.
+  if (aState.mDuration.WasPassed() && aState.mDuration.Value() < 0.0) {
+    return aRv.ThrowTypeError(nsPrintfCString(
+        "Invalid duration %f, it can't be negative", aState.mDuration.Value()));
+  }
+
+  // If the position is negative or greater than duration, throw a TypeError.
+  if (aState.mPosition.WasPassed() &&
+      (aState.mPosition.Value() < 0.0 ||
+       aState.mPosition.Value() > aState.mDuration.Value())) {
+    return aRv.ThrowTypeError(nsPrintfCString(
+        "Invalid position %f, it can't be negative or greater than duration",
+        aState.mPosition.Value()));
+  }
+
+  // If the playbackRate is zero, throw a TypeError.
+  if (aState.mPlaybackRate.WasPassed() && aState.mPlaybackRate.Value() == 0.0) {
+    return aRv.ThrowTypeError("The playbackRate is zero");
+  }
+
+  // If the position is not present, set it to zero.
+  double position = aState.mPosition.WasPassed() ? aState.mPosition.Value() : 0;
+
+  // If the playbackRate is not present, set it to 1.0.
+  double playbackRate =
+      aState.mPlaybackRate.WasPassed() ? aState.mPlaybackRate.Value() : 1.0;
+
+  // Update the position state and last position updated time.
+  MOZ_ASSERT(aState.mDuration.WasPassed());
+  mPositionState =
+      Some(PositionState(aState.mDuration.Value(), playbackRate, position));
+  NotifyPositionStateChanged();
+}
+
+void MediaSession::NotifyHandler(const MediaSessionActionDetails& aDetails) {
+  DispatchNotifyHandler(aDetails);
+}
+
+void MediaSession::DispatchNotifyHandler(
+    const MediaSessionActionDetails& aDetails) {
+  class Runnable final : public mozilla::Runnable {
+   public:
+    Runnable(const MediaSession* aSession,
+             const MediaSessionActionDetails& aDetails)
+        : mozilla::Runnable("MediaSession::DispatchNotifyHandler"),
+          mSession(aSession),
+          mDetails(aDetails) {}
+
+    MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHOD Run() override {
+      if (RefPtr<MediaSessionActionHandler> handler =
+              mSession->GetActionHandler(mDetails.mAction)) {
+        handler->Call(mDetails);
+      }
+      return NS_OK;
+    }
+
+   private:
+    RefPtr<const MediaSession> mSession;
+    MediaSessionActionDetails mDetails;
+  };
+
+  RefPtr<nsIRunnable> runnable = new Runnable(this, aDetails);
+  NS_DispatchToMainThread(runnable);
+}
+
+bool MediaSession::IsSupportedAction(MediaSessionAction aAction) const {
+  MOZ_ASSERT(size_t(aAction) < ArrayLength(mActionHandlers));
+  return mActionHandlers[aAction] != nullptr;
+}
+
+bool MediaSession::IsActive() const {
+  RefPtr<BrowsingContext> currentBC = GetParentObject()->GetBrowsingContext();
+  MOZ_ASSERT(currentBC);
+  RefPtr<WindowContext> wc = currentBC->GetTopWindowContext();
+  if (!wc) {
+    return false;
+  }
+  Maybe<uint64_t> activeSessionContextId = wc->GetActiveMediaSessionContextId();
+  if (!activeSessionContextId) {
+    return false;
+  }
+  LOG("session context Id=%" PRIu64 ", active session context Id=%" PRIu64,
+      currentBC->Id(), *activeSessionContextId);
+  return *activeSessionContextId == currentBC->Id();
+}
+
+void MediaSession::NotifyMediaSessionDocStatus(SessionDocStatus aState) {
+  RefPtr<BrowsingContext> currentBC = GetParentObject()->GetBrowsingContext();
+  MOZ_ASSERT(currentBC, "Update session status after context destroyed!");
+
+  RefPtr<IMediaInfoUpdater> updater = ContentMediaAgent::Get(currentBC);
+  if (!updater) {
+    return;
+  }
+  if (aState == SessionDocStatus::eActive) {
+    updater->NotifySessionCreated(currentBC->Id());
+    // If media session set its attributes before its document becomes active,
+    // then we would notify those attributes which hasn't been notified as well
+    // because attributes update would only happen if its document is already
+    // active.
+    NotifyMediaSessionAttributes();
+  } else {
+    updater->NotifySessionDestroyed(currentBC->Id());
+  }
+}
+
+void MediaSession::NotifyMediaSessionAttributes() {
+  MOZ_ASSERT(mSessionDocState == SessionDocStatus::eActive);
+  if (mDeclaredPlaybackState != MediaSessionPlaybackState::None) {
+    NotifyPlaybackStateUpdated();
+  }
+  if (mMediaMetadata) {
+    NotifyMetadataUpdated();
+  }
+  for (size_t idx = 0; idx < ArrayLength(mActionHandlers); idx++) {
+    MediaSessionAction action = static_cast<MediaSessionAction>(idx);
+    if (mActionHandlers[action]) {
+      NotifyEnableSupportedAction(action);
+    }
+  }
+  if (mPositionState) {
+    NotifyPositionStateChanged();
+  }
+}
+
+void MediaSession::NotifyPlaybackStateUpdated() {
+  if (mSessionDocState != SessionDocStatus::eActive) {
+    return;
+  }
+  RefPtr<BrowsingContext> currentBC = GetParentObject()->GetBrowsingContext();
+  MOZ_ASSERT(currentBC,
+             "Update session playback state after context destroyed!");
+  if (RefPtr<IMediaInfoUpdater> updater = ContentMediaAgent::Get(currentBC)) {
+    updater->SetDeclaredPlaybackState(currentBC->Id(), mDeclaredPlaybackState);
+  }
+}
+
+void MediaSession::NotifyMetadataUpdated() {
+  if (mSessionDocState != SessionDocStatus::eActive) {
+    return;
+  }
+  RefPtr<BrowsingContext> currentBC = GetParentObject()->GetBrowsingContext();
+  MOZ_ASSERT(currentBC, "Update session metadata after context destroyed!");
+
+  Maybe<MediaMetadataBase> metadata;
+  if (GetMetadata()) {
+    metadata.emplace(*(GetMetadata()->AsMetadataBase()));
+  }
+  if (RefPtr<IMediaInfoUpdater> updater = ContentMediaAgent::Get(currentBC)) {
+    updater->UpdateMetadata(currentBC->Id(), metadata);
+  }
+}
+
+void MediaSession::NotifyEnableSupportedAction(MediaSessionAction aAction) {
+  if (mSessionDocState != SessionDocStatus::eActive) {
+    return;
+  }
+  RefPtr<BrowsingContext> currentBC = GetParentObject()->GetBrowsingContext();
+  MOZ_ASSERT(currentBC, "Update action after context destroyed!");
+  if (RefPtr<IMediaInfoUpdater> updater = ContentMediaAgent::Get(currentBC)) {
+    updater->EnableAction(currentBC->Id(), aAction);
+  }
+}
+
+void MediaSession::NotifyDisableSupportedAction(MediaSessionAction aAction) {
+  if (mSessionDocState != SessionDocStatus::eActive) {
+    return;
+  }
+  RefPtr<BrowsingContext> currentBC = GetParentObject()->GetBrowsingContext();
+  MOZ_ASSERT(currentBC, "Update action after context destroyed!");
+  if (RefPtr<IMediaInfoUpdater> updater = ContentMediaAgent::Get(currentBC)) {
+    updater->DisableAction(currentBC->Id(), aAction);
+  }
+}
+
+void MediaSession::NotifyPositionStateChanged() {
+  if (mSessionDocState != SessionDocStatus::eActive) {
+    return;
+  }
+  RefPtr<BrowsingContext> currentBC = GetParentObject()->GetBrowsingContext();
+  MOZ_ASSERT(currentBC, "Update action after context destroyed!");
+  if (RefPtr<IMediaInfoUpdater> updater = ContentMediaAgent::Get(currentBC)) {
+    updater->UpdatePositionState(currentBC->Id(), *mPositionState);
+  }
+}
+
+}  // namespace mozilla::dom