C++ BluetoothSignal::path方法代码示例

void
BluetoothService::DistributeSignal(const BluetoothSignal& aSignal)
{
  MOZ_ASSERT(NS_IsMainThread());

  if (aSignal.path().EqualsLiteral(KEY_LOCAL_AGENT)) {
    Notify(aSignal);
    return;
  } else if (aSignal.path().EqualsLiteral(KEY_REMOTE_AGENT)) {
    Notify(aSignal);
    return;
  }

  BluetoothSignalObserverList* ol;
  if (!mBluetoothSignalObserverTable.Get(aSignal.path(), &ol)) {
#if DEBUG
    nsAutoCString msg("No observer registered for path ");
    msg.Append(NS_ConvertUTF16toUTF8(aSignal.path()));
    NS_WARNING(msg.get());
#endif
    return;
  }
  MOZ_ASSERT(ol->Length());
  ol->Broadcast(aSignal);
}

void
BluetoothService::DistributeSignal(const BluetoothSignal& aSignal)
{
  MOZ_ASSERT(NS_IsMainThread());

  BluetoothSignalObserverList* ol;
  if (!mBluetoothSignalObserverTable.Get(aSignal.path(), &ol)) {
    // If there is no BluetoohPairingListener in observer table, put the signal
    // into a pending queue of pairing requests and send a system message to
    // launch bluetooth certified app.
    if (aSignal.path().EqualsLiteral(KEY_PAIRING_LISTENER)) {
      mPendingPairReqSignals.AppendElement(aSignal);

      BT_ENSURE_TRUE_VOID_BROADCAST_SYSMSG(
        NS_LITERAL_STRING(SYS_MSG_BT_PAIRING_REQ),
        BluetoothValue(EmptyString()));
    } else {
      BT_WARNING("No observer registered for path %s",
                 NS_ConvertUTF16toUTF8(aSignal.path()).get());
    }
    return;
  }

  MOZ_ASSERT(ol->Length());
  ol->Broadcast(aSignal);
}

void
BluetoothService::DistributeSignal(const BluetoothSignal& aSignal)
{
  MOZ_ASSERT(NS_IsMainThread());
  // Notify observers that a message has been sent
  BluetoothSignalObserverList* ol;
  if (!mBluetoothSignalObserverTable.Get(aSignal.path(), &ol)) {
#if DEBUG
    nsAutoCString msg("No observer registered for path ");
    msg.Append(NS_ConvertUTF16toUTF8(aSignal.path()));
    NS_WARNING(msg.get());
#endif
    return;
  }
  MOZ_ASSERT(ol->Length());
  ol->Broadcast(aSignal);
}

nsresult
BluetoothService::DistributeSignal(const BluetoothSignal& signal)
{
  MOZ_ASSERT(NS_IsMainThread());
  // Notify observers that a message has been sent
  BluetoothSignalObserverList* ol;
  if (!mBluetoothSignalObserverTable.Get(signal.path(), &ol)) {
    return NS_OK;
  }
  ol->Broadcast(signal);
  return NS_OK;
}

nsresult
BluetoothService::DistributeSignal(const BluetoothSignal& signal)
{
  MOZ_ASSERT(NS_IsMainThread());
  // Notify observers that a message has been sent
  BluetoothSignalObserverList* ol;
  if (!mBluetoothSignalObserverTable.Get(signal.path(), &ol)) {
#if DEBUG
    nsString msg;
    msg.AssignLiteral("No observer registered for path");
    msg.Append(signal.path());
    NS_WARNING(NS_ConvertUTF16toUTF8(msg).get());
#endif
    return NS_OK;
  }
#if DEBUG
  if (ol->Length() == 0) {
    NS_WARNING("Distributing to observer list of 0");
  }
#endif
  ol->Broadcast(signal);
  return NS_OK;
}

/* HandleSinkPropertyChanged update sink state in A2dp
 *
 * Possible values: "disconnected", "connecting", "connected", "playing"
 *
 * 1. "disconnected" -> "connecting"
 *    Either an incoming or outgoing connection attempt ongoing
 * 2. "connecting" -> "disconnected"
 *    Connection attempt failed
 * 3. "connecting" -> "connected"
 *    Successfully connected
 * 4. "connected" -> "playing"
 *    Audio stream active
 * 5. "playing" -> "connected"
 *    Audio stream suspended
 * 6. "connected" -> "disconnected"
 *    "playing" -> "disconnected"
 *    Disconnected from local or the remote device
 */
void
BluetoothA2dpManager::HandleSinkPropertyChanged(const BluetoothSignal& aSignal)
{
  MOZ_ASSERT(NS_IsMainThread());
  MOZ_ASSERT(aSignal.value().type() ==
             BluetoothValue::TArrayOfBluetoothNamedValue);

  const nsString& address = aSignal.path();
  /**
   * Update sink property only if
   * - mDeviceAddress is empty (A2dp is disconnected), or
   * - this property change is from the connected sink.
   */
  NS_ENSURE_TRUE_VOID(mDeviceAddress.IsEmpty() ||
                      mDeviceAddress.Equals(address));

  const InfallibleTArray<BluetoothNamedValue>& arr =
    aSignal.value().get_ArrayOfBluetoothNamedValue();
  MOZ_ASSERT(arr.Length() == 1);

  /**
   * There are three properties:
   * - "State": a string
   * - "Connected": a boolean value
   * - "Playing": a boolean value
   *
   * Note that only "State" is handled in this function.
   */

  const nsString& name = arr[0].name();
  NS_ENSURE_TRUE_VOID(name.EqualsLiteral("State"));

  const BluetoothValue& value = arr[0].value();
  MOZ_ASSERT(value.type() == BluetoothValue::TnsString);
  SinkState newState = StatusStringToSinkState(value.get_nsString());
  NS_ENSURE_TRUE_VOID((newState != SinkState::SINK_UNKNOWN) &&
                      (newState != mSinkState));

  SinkState prevState = mSinkState;
  mSinkState = newState;

  switch(mSinkState) {
    case SinkState::SINK_CONNECTING:
      // case 1: Either an incoming or outgoing connection attempt ongoing
      MOZ_ASSERT(prevState == SinkState::SINK_DISCONNECTED);
      break;
    case SinkState::SINK_PLAYING:
      // case 4: Audio stream active
      MOZ_ASSERT(prevState == SinkState::SINK_CONNECTED);
      break;
    case SinkState::SINK_CONNECTED:
      // case 5: Audio stream suspended
      if (prevState == SinkState::SINK_PLAYING ||
          prevState == SinkState::SINK_CONNECTED) {
        break;
      }

      // case 3: Successfully connected
      mA2dpConnected = true;
      mDeviceAddress = address;
      NotifyConnectionStatusChanged();

      OnConnect(EmptyString());
      break;
    case SinkState::SINK_DISCONNECTED:
      // case 2: Connection attempt failed
      if (prevState == SinkState::SINK_CONNECTING) {
        OnConnect(NS_LITERAL_STRING(ERR_CONNECTION_FAILED));
        break;
      }

      // case 6: Disconnected from the remote device
      MOZ_ASSERT(prevState == SinkState::SINK_CONNECTED ||
                 prevState == SinkState::SINK_PLAYING) ;

      mA2dpConnected = false;
      NotifyConnectionStatusChanged();
      mDeviceAddress.Truncate();
      OnDisconnect(EmptyString());
      break;
    default:
      break;
//.........这里部分代码省略.........