Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

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

1 files changed, 482 insertions, 0 deletions

diff --git a/dom/media/mediacontrol/MediaStatusManager.cpp b/dom/media/mediacontrol/MediaStatusManager.cpp
new file mode 100644
index 0000000000..4365e6b531
--- /dev/null
+++ b/dom/media/mediacontrol/MediaStatusManager.cpp
@@ -0,0 +1,482 @@
+/* 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 "MediaStatusManager.h"
+
+#include "MediaControlService.h"
+#include "mozilla/dom/CanonicalBrowsingContext.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/MediaControlUtils.h"
+#include "mozilla/dom/WindowGlobalParent.h"
+#include "mozilla/StaticPrefs_media.h"
+#include "nsContentUtils.h"
+#include "nsIChromeRegistry.h"
+#include "nsIObserverService.h"
+#include "nsIXULAppInfo.h"
+#include "nsNetUtil.h"
+
+#ifdef MOZ_PLACES
+#  include "nsIFaviconService.h"
+#endif  // MOZ_PLACES
+
+extern mozilla::LazyLogModule gMediaControlLog;
+
+// avoid redefined macro in unified build
+#undef LOG
+#define LOG(msg, ...)                        \
+  MOZ_LOG(gMediaControlLog, LogLevel::Debug, \
+          ("MediaStatusManager=%p, " msg, this, ##__VA_ARGS__))
+
+namespace mozilla::dom {
+
+static bool IsMetadataEmpty(const Maybe<MediaMetadataBase>& aMetadata) {
+  // Media session's metadata is null.
+  if (!aMetadata) {
+    return true;
+  }
+
+  // All attirbutes in metadata are empty.
+  // https://w3c.github.io/mediasession/#empty-metadata
+  const MediaMetadataBase& metadata = *aMetadata;
+  return metadata.mTitle.IsEmpty() && metadata.mArtist.IsEmpty() &&
+         metadata.mAlbum.IsEmpty() && metadata.mArtwork.IsEmpty();
+}
+
+MediaStatusManager::MediaStatusManager(uint64_t aBrowsingContextId)
+    : mTopLevelBrowsingContextId(aBrowsingContextId) {
+  MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess(),
+                        "MediaStatusManager only runs on Chrome process!");
+}
+
+void MediaStatusManager::NotifyMediaAudibleChanged(uint64_t aBrowsingContextId,
+                                                   MediaAudibleState aState) {
+  Maybe<uint64_t> oldAudioFocusOwnerId =
+      mPlaybackStatusDelegate.GetAudioFocusOwnerContextId();
+  mPlaybackStatusDelegate.UpdateMediaAudibleState(aBrowsingContextId, aState);
+  Maybe<uint64_t> newAudioFocusOwnerId =
+      mPlaybackStatusDelegate.GetAudioFocusOwnerContextId();
+  if (oldAudioFocusOwnerId != newAudioFocusOwnerId) {
+    HandleAudioFocusOwnerChanged(newAudioFocusOwnerId);
+  }
+}
+
+void MediaStatusManager::NotifySessionCreated(uint64_t aBrowsingContextId) {
+  const bool created = mMediaSessionInfoMap.WithEntryHandle(
+      aBrowsingContextId, [&](auto&& entry) {
+        if (entry) return false;
+
+        LOG("Session %" PRIu64 " has been created", aBrowsingContextId);
+        entry.Insert(MediaSessionInfo::EmptyInfo());
+        return true;
+      });
+
+  if (created && IsSessionOwningAudioFocus(aBrowsingContextId)) {
+    // This can't be done from within the WithEntryHandle functor, since it
+    // accesses mMediaSessionInfoMap.
+    SetActiveMediaSessionContextId(aBrowsingContextId);
+  }
+}
+
+void MediaStatusManager::NotifySessionDestroyed(uint64_t aBrowsingContextId) {
+  if (mMediaSessionInfoMap.Remove(aBrowsingContextId)) {
+    LOG("Session %" PRIu64 " has been destroyed", aBrowsingContextId);
+
+    if (mActiveMediaSessionContextId &&
+        *mActiveMediaSessionContextId == aBrowsingContextId) {
+      ClearActiveMediaSessionContextIdIfNeeded();
+    }
+  }
+}
+
+void MediaStatusManager::UpdateMetadata(
+    uint64_t aBrowsingContextId, const Maybe<MediaMetadataBase>& aMetadata) {
+  auto info = mMediaSessionInfoMap.Lookup(aBrowsingContextId);
+  if (!info) {
+    return;
+  }
+  if (IsMetadataEmpty(aMetadata)) {
+    LOG("Reset metadata for session %" PRIu64, aBrowsingContextId);
+    info->mMetadata.reset();
+  } else {
+    LOG("Update metadata for session %" PRIu64 " title=%s artist=%s album=%s",
+        aBrowsingContextId, NS_ConvertUTF16toUTF8((*aMetadata).mTitle).get(),
+        NS_ConvertUTF16toUTF8(aMetadata->mArtist).get(),
+        NS_ConvertUTF16toUTF8(aMetadata->mAlbum).get());
+    info->mMetadata = aMetadata;
+  }
+  // Only notify the event if the changed metadata belongs to the active media
+  // session.
+  if (mActiveMediaSessionContextId &&
+      *mActiveMediaSessionContextId == aBrowsingContextId) {
+    LOG("Notify metadata change for active session %" PRIu64,
+        aBrowsingContextId);
+    mMetadataChangedEvent.Notify(GetCurrentMediaMetadata());
+  }
+  if (StaticPrefs::media_mediacontrol_testingevents_enabled()) {
+    if (nsCOMPtr<nsIObserverService> obs = services::GetObserverService()) {
+      obs->NotifyObservers(nullptr, "media-session-controller-metadata-changed",
+                           nullptr);
+    }
+  }
+}
+
+void MediaStatusManager::HandleAudioFocusOwnerChanged(
+    Maybe<uint64_t>& aBrowsingContextId) {
+  // No one is holding the audio focus.
+  if (!aBrowsingContextId) {
+    LOG("No one is owning audio focus");
+    return ClearActiveMediaSessionContextIdIfNeeded();
+  }
+
+  // This owner of audio focus doesn't have media session, so we should deactive
+  // the active session because the active session must own the audio focus.
+  if (!mMediaSessionInfoMap.Contains(*aBrowsingContextId)) {
+    LOG("The owner of audio focus doesn't have media session");
+    return ClearActiveMediaSessionContextIdIfNeeded();
+  }
+
+  // This owner has media session so it should become an active session context.
+  SetActiveMediaSessionContextId(*aBrowsingContextId);
+}
+
+void MediaStatusManager::SetActiveMediaSessionContextId(
+    uint64_t aBrowsingContextId) {
+  if (mActiveMediaSessionContextId &&
+      *mActiveMediaSessionContextId == aBrowsingContextId) {
+    LOG("Active session context %" PRIu64 " keeps unchanged",
+        *mActiveMediaSessionContextId);
+    return;
+  }
+  mActiveMediaSessionContextId = Some(aBrowsingContextId);
+  StoreMediaSessionContextIdOnWindowContext();
+  LOG("context %" PRIu64 " becomes active session context",
+      *mActiveMediaSessionContextId);
+  mMetadataChangedEvent.Notify(GetCurrentMediaMetadata());
+  mSupportedActionsChangedEvent.Notify(GetSupportedActions());
+  if (StaticPrefs::media_mediacontrol_testingevents_enabled()) {
+    if (nsCOMPtr<nsIObserverService> obs = services::GetObserverService()) {
+      obs->NotifyObservers(nullptr, "active-media-session-changed", nullptr);
+    }
+  }
+}
+
+void MediaStatusManager::ClearActiveMediaSessionContextIdIfNeeded() {
+  if (!mActiveMediaSessionContextId) {
+    return;
+  }
+  LOG("Clear active session context");
+  mActiveMediaSessionContextId.reset();
+  StoreMediaSessionContextIdOnWindowContext();
+  mMetadataChangedEvent.Notify(GetCurrentMediaMetadata());
+  mSupportedActionsChangedEvent.Notify(GetSupportedActions());
+  if (StaticPrefs::media_mediacontrol_testingevents_enabled()) {
+    if (nsCOMPtr<nsIObserverService> obs = services::GetObserverService()) {
+      obs->NotifyObservers(nullptr, "active-media-session-changed", nullptr);
+    }
+  }
+}
+
+void MediaStatusManager::StoreMediaSessionContextIdOnWindowContext() {
+  RefPtr<CanonicalBrowsingContext> bc =
+      CanonicalBrowsingContext::Get(mTopLevelBrowsingContextId);
+  if (bc && bc->GetTopWindowContext()) {
+    Unused << bc->GetTopWindowContext()->SetActiveMediaSessionContextId(
+        mActiveMediaSessionContextId);
+  }
+}
+
+bool MediaStatusManager::IsSessionOwningAudioFocus(
+    uint64_t aBrowsingContextId) const {
+  Maybe<uint64_t> audioFocusContextId =
+      mPlaybackStatusDelegate.GetAudioFocusOwnerContextId();
+  return audioFocusContextId ? *audioFocusContextId == aBrowsingContextId
+                             : false;
+}
+
+MediaMetadataBase MediaStatusManager::CreateDefaultMetadata() const {
+  MediaMetadataBase metadata;
+  metadata.mTitle = GetDefaultTitle();
+  metadata.mArtwork.AppendElement()->mSrc = GetDefaultFaviconURL();
+
+  LOG("Default media metadata, title=%s, album src=%s",
+      NS_ConvertUTF16toUTF8(metadata.mTitle).get(),
+      NS_ConvertUTF16toUTF8(metadata.mArtwork[0].mSrc).get());
+  return metadata;
+}
+
+nsString MediaStatusManager::GetDefaultTitle() const {
+  RefPtr<MediaControlService> service = MediaControlService::GetService();
+  nsString defaultTitle = service->GetFallbackTitle();
+
+  RefPtr<CanonicalBrowsingContext> bc =
+      CanonicalBrowsingContext::Get(mTopLevelBrowsingContextId);
+  if (!bc) {
+    return defaultTitle;
+  }
+
+  RefPtr<WindowGlobalParent> globalParent = bc->GetCurrentWindowGlobal();
+  if (!globalParent) {
+    return defaultTitle;
+  }
+
+  // The media metadata would be shown on the virtual controller interface. For
+  // example, on Android, the interface would be shown on both notification bar
+  // and lockscreen. Therefore, what information we provide via metadata is
+  // quite important, because if we're in private browsing, we don't want to
+  // expose details about what website the user is browsing on the lockscreen.
+  // Therefore, using the default title when in the private browsing or the
+  // document title is empty. Otherwise, use the document title.
+  nsString documentTitle;
+  if (!IsInPrivateBrowsing()) {
+    globalParent->GetDocumentTitle(documentTitle);
+  }
+  return documentTitle.IsEmpty() ? defaultTitle : documentTitle;
+}
+
+nsString MediaStatusManager::GetDefaultFaviconURL() const {
+#ifdef MOZ_PLACES
+  nsCOMPtr<nsIURI> faviconURI;
+  nsresult rv = NS_NewURI(getter_AddRefs(faviconURI),
+                          nsLiteralCString(FAVICON_DEFAULT_URL));
+  NS_ENSURE_SUCCESS(rv, u""_ns);
+
+  // Convert URI from `chrome://XXX` to `file://XXX` because we would like to
+  // let OS related frameworks, such as SMTC and MPRIS, handle this URL in order
+  // to show the icon on virtual controller interface.
+  nsCOMPtr<nsIChromeRegistry> regService = services::GetChromeRegistry();
+  if (!regService) {
+    return u""_ns;
+  }
+  nsCOMPtr<nsIURI> processedURI;
+  regService->ConvertChromeURL(faviconURI, getter_AddRefs(processedURI));
+
+  nsAutoCString spec;
+  if (NS_FAILED(processedURI->GetSpec(spec))) {
+    return u""_ns;
+  }
+  return NS_ConvertUTF8toUTF16(spec);
+#else
+  return u""_ns;
+#endif
+}
+
+void MediaStatusManager::SetDeclaredPlaybackState(
+    uint64_t aBrowsingContextId, MediaSessionPlaybackState aState) {
+  auto info = mMediaSessionInfoMap.Lookup(aBrowsingContextId);
+  if (!info) {
+    return;
+  }
+  LOG("SetDeclaredPlaybackState from %s to %s",
+      ToMediaSessionPlaybackStateStr(info->mDeclaredPlaybackState),
+      ToMediaSessionPlaybackStateStr(aState));
+  info->mDeclaredPlaybackState = aState;
+  UpdateActualPlaybackState();
+}
+
+MediaSessionPlaybackState MediaStatusManager::GetCurrentDeclaredPlaybackState()
+    const {
+  if (!mActiveMediaSessionContextId) {
+    return MediaSessionPlaybackState::None;
+  }
+  return mMediaSessionInfoMap.Get(*mActiveMediaSessionContextId)
+      .mDeclaredPlaybackState;
+}
+
+void MediaStatusManager::NotifyMediaPlaybackChanged(uint64_t aBrowsingContextId,
+                                                    MediaPlaybackState aState) {
+  LOG("UpdateMediaPlaybackState %s for context %" PRIu64,
+      ToMediaPlaybackStateStr(aState), aBrowsingContextId);
+  const bool oldPlaying = mPlaybackStatusDelegate.IsPlaying();
+  mPlaybackStatusDelegate.UpdateMediaPlaybackState(aBrowsingContextId, aState);
+
+  // Playback state doesn't change, we don't need to update the guessed playback
+  // state. This is used to prevent the state from changing from `none` to
+  // `paused` when receiving `MediaPlaybackState::eStarted`.
+  if (mPlaybackStatusDelegate.IsPlaying() == oldPlaying) {
+    return;
+  }
+  if (mPlaybackStatusDelegate.IsPlaying()) {
+    SetGuessedPlayState(MediaSessionPlaybackState::Playing);
+  } else {
+    SetGuessedPlayState(MediaSessionPlaybackState::Paused);
+  }
+}
+
+void MediaStatusManager::SetGuessedPlayState(MediaSessionPlaybackState aState) {
+  if (aState == mGuessedPlaybackState) {
+    return;
+  }
+  LOG("SetGuessedPlayState : '%s'", ToMediaSessionPlaybackStateStr(aState));
+  mGuessedPlaybackState = aState;
+  UpdateActualPlaybackState();
+}
+
+void MediaStatusManager::UpdateActualPlaybackState() {
+  // The way to compute the actual playback state is based on the spec.
+  // https://w3c.github.io/mediasession/#actual-playback-state
+  MediaSessionPlaybackState newState =
+      GetCurrentDeclaredPlaybackState() == MediaSessionPlaybackState::Playing
+          ? MediaSessionPlaybackState::Playing
+          : mGuessedPlaybackState;
+  if (mActualPlaybackState == newState) {
+    return;
+  }
+  mActualPlaybackState = newState;
+  LOG("UpdateActualPlaybackState : '%s'",
+      ToMediaSessionPlaybackStateStr(mActualPlaybackState));
+  mPlaybackStateChangedEvent.Notify(mActualPlaybackState);
+}
+
+void MediaStatusManager::EnableAction(uint64_t aBrowsingContextId,
+                                      MediaSessionAction aAction) {
+  auto info = mMediaSessionInfoMap.Lookup(aBrowsingContextId);
+  if (!info) {
+    return;
+  }
+  if (info->IsActionSupported(aAction)) {
+    LOG("Action '%s' has already been enabled for context %" PRIu64,
+        ToMediaSessionActionStr(aAction), aBrowsingContextId);
+    return;
+  }
+  LOG("Enable action %s for context %" PRIu64, ToMediaSessionActionStr(aAction),
+      aBrowsingContextId);
+  info->EnableAction(aAction);
+  NotifySupportedKeysChangedIfNeeded(aBrowsingContextId);
+}
+
+void MediaStatusManager::DisableAction(uint64_t aBrowsingContextId,
+                                       MediaSessionAction aAction) {
+  auto info = mMediaSessionInfoMap.Lookup(aBrowsingContextId);
+  if (!info) {
+    return;
+  }
+  if (!info->IsActionSupported(aAction)) {
+    LOG("Action '%s' hasn't been enabled yet for context %" PRIu64,
+        ToMediaSessionActionStr(aAction), aBrowsingContextId);
+    return;
+  }
+  LOG("Disable action %s for context %" PRIu64,
+      ToMediaSessionActionStr(aAction), aBrowsingContextId);
+  info->DisableAction(aAction);
+  NotifySupportedKeysChangedIfNeeded(aBrowsingContextId);
+}
+
+void MediaStatusManager::UpdatePositionState(uint64_t aBrowsingContextId,
+                                             const PositionState& aState) {
+  // The position state comes from non-active media session which we don't care.
+  if (!mActiveMediaSessionContextId ||
+      *mActiveMediaSessionContextId != aBrowsingContextId) {
+    return;
+  }
+  mPositionStateChangedEvent.Notify(aState);
+}
+
+void MediaStatusManager::NotifySupportedKeysChangedIfNeeded(
+    uint64_t aBrowsingContextId) {
+  // Only the active media session's supported actions would be shown in virtual
+  // control interface, so we only notify the event when supported actions
+  // change happens on the active media session.
+  if (!mActiveMediaSessionContextId ||
+      *mActiveMediaSessionContextId != aBrowsingContextId) {
+    return;
+  }
+  mSupportedActionsChangedEvent.Notify(GetSupportedActions());
+}
+
+CopyableTArray<MediaSessionAction> MediaStatusManager::GetSupportedActions()
+    const {
+  CopyableTArray<MediaSessionAction> supportedActions;
+  if (!mActiveMediaSessionContextId) {
+    return supportedActions;
+  }
+
+  MediaSessionInfo info =
+      mMediaSessionInfoMap.Get(*mActiveMediaSessionContextId);
+  const uint8_t actionNums = uint8_t(MediaSessionAction::EndGuard_);
+  for (uint8_t actionValue = 0; actionValue < actionNums; actionValue++) {
+    MediaSessionAction action = ConvertToMediaSessionAction(actionValue);
+    if (info.IsActionSupported(action)) {
+      supportedActions.AppendElement(action);
+    }
+  }
+  return supportedActions;
+}
+
+MediaMetadataBase MediaStatusManager::GetCurrentMediaMetadata() const {
+  // If we don't have active media session, active media session doesn't have
+  // media metadata, or we're in private browsing mode, then we should create a
+  // default metadata which is using website's title and favicon as title and
+  // artwork.
+  if (mActiveMediaSessionContextId && !IsInPrivateBrowsing()) {
+    MediaSessionInfo info =
+        mMediaSessionInfoMap.Get(*mActiveMediaSessionContextId);
+    if (!info.mMetadata) {
+      return CreateDefaultMetadata();
+    }
+    MediaMetadataBase& metadata = *(info.mMetadata);
+    FillMissingTitleAndArtworkIfNeeded(metadata);
+    return metadata;
+  }
+  return CreateDefaultMetadata();
+}
+
+void MediaStatusManager::FillMissingTitleAndArtworkIfNeeded(
+    MediaMetadataBase& aMetadata) const {
+  // If the metadata doesn't set its title and artwork properly, we would like
+  // to use default title and favicon instead in order to prevent showing
+  // nothing on the virtual control interface.
+  if (aMetadata.mTitle.IsEmpty()) {
+    aMetadata.mTitle = GetDefaultTitle();
+  }
+  if (aMetadata.mArtwork.IsEmpty()) {
+    aMetadata.mArtwork.AppendElement()->mSrc = GetDefaultFaviconURL();
+  }
+}
+
+bool MediaStatusManager::IsInPrivateBrowsing() const {
+  RefPtr<CanonicalBrowsingContext> bc =
+      CanonicalBrowsingContext::Get(mTopLevelBrowsingContextId);
+  if (!bc) {
+    return false;
+  }
+  RefPtr<Element> element = bc->GetEmbedderElement();
+  if (!element) {
+    return false;
+  }
+  return nsContentUtils::IsInPrivateBrowsing(element->OwnerDoc());
+}
+
+MediaSessionPlaybackState MediaStatusManager::PlaybackState() const {
+  return mActualPlaybackState;
+}
+
+bool MediaStatusManager::IsMediaAudible() const {
+  return mPlaybackStatusDelegate.IsAudible();
+}
+
+bool MediaStatusManager::IsMediaPlaying() const {
+  return mActualPlaybackState == MediaSessionPlaybackState::Playing;
+}
+
+bool MediaStatusManager::IsAnyMediaBeingControlled() const {
+  return mPlaybackStatusDelegate.IsAnyMediaBeingControlled();
+}
+
+void MediaStatusManager::NotifyPageTitleChanged() {
+  // If active media session has set non-empty metadata, then we would use that
+  // instead of using default metadata.
+  if (mActiveMediaSessionContextId &&
+      mMediaSessionInfoMap.Lookup(*mActiveMediaSessionContextId)->mMetadata) {
+    return;
+  }
+  // In private browsing mode, we won't show page title on default metadata so
+  // we don't need to update that.
+  if (IsInPrivateBrowsing()) {
+    return;
+  }
+  LOG("page title changed, update default metadata");
+  mMetadataChangedEvent.Notify(GetCurrentMediaMetadata());
+}
+
+}  // namespace mozilla::dom