C++ nsTArray::IsEmpty方法代码示例

static void
ReportToConsole(nsIDocument* aDocument,
                const char* aConsoleStringId,
                nsTArray<const char16_t*>& aParams)
{
  MOZ_ASSERT(NS_IsMainThread());
  MOZ_ASSERT(aDocument);

  DD_DEBUG("DecoderDoctorDiagnostics.cpp:ReportToConsole(doc=%p) ReportToConsole"
           " - aMsg='%s' params={%s%s%s%s}",
           aDocument, aConsoleStringId,
           aParams.IsEmpty()
           ? "<no params>"
           : NS_ConvertUTF16toUTF8(aParams[0]).get(),
           (aParams.Length() < 1 || !aParams[1]) ? "" : ", ",
           (aParams.Length() < 1 || !aParams[1])
           ? ""
           : NS_ConvertUTF16toUTF8(aParams[1]).get(),
           aParams.Length() < 2 ? "" : ", ...");
  nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
                                  NS_LITERAL_CSTRING("Media"),
                                  aDocument,
                                  nsContentUtils::eDOM_PROPERTIES,
                                  aConsoleStringId,
                                  aParams.IsEmpty()
                                  ? nullptr
                                  : aParams.Elements(),
                                  aParams.Length());
}

void ShmSegmentsWriter::Flush(nsTArray<RefCountedShmem>& aSmallAllocs,
                              nsTArray<ipc::Shmem>& aLargeAllocs) {
  MOZ_ASSERT(aSmallAllocs.IsEmpty());
  MOZ_ASSERT(aLargeAllocs.IsEmpty());
  mSmallAllocs.SwapElements(aSmallAllocs);
  mLargeAllocs.SwapElements(aLargeAllocs);
  mCursor = 0;
}

static void
BondStateChangedCallback(bt_status_t aStatus, bt_bdaddr_t* aRemoteBdAddress,
                         bt_bond_state_t aState)
{
  MOZ_ASSERT(!NS_IsMainThread());

  nsAutoString remoteAddress;
  BdAddressTypeToString(aRemoteBdAddress, remoteAddress);

  // We don't need to handle bonding state
  NS_ENSURE_TRUE_VOID(aState != BT_BOND_STATE_BONDING);
  NS_ENSURE_FALSE_VOID(aState == BT_BOND_STATE_BONDED &&
                       sAdapterBondedAddressArray.Contains(remoteAddress));
  bool bonded;
  if (aState == BT_BOND_STATE_NONE) {
    bonded = false;
    sAdapterBondedAddressArray.RemoveElement(remoteAddress);
  } else if (aState == BT_BOND_STATE_BONDED) {
    bonded = true;
    sAdapterBondedAddressArray.AppendElement(remoteAddress);
  }

  // Update bonded address list to BluetoothAdapter
  InfallibleTArray<BluetoothNamedValue> propertiesChangeArray;
  propertiesChangeArray.AppendElement(
    BluetoothNamedValue(NS_LITERAL_STRING("Devices"),
                        sAdapterBondedAddressArray));
  BluetoothValue value(propertiesChangeArray);
  BluetoothSignal signal(NS_LITERAL_STRING("PropertyChanged"),
                         NS_LITERAL_STRING(KEY_ADAPTER),
                         BluetoothValue(propertiesChangeArray));
  NS_DispatchToMainThread(new DistributeBluetoothSignalTask(signal));

  // Update bonding status to gaia
  InfallibleTArray<BluetoothNamedValue> propertiesArray;
  propertiesArray.AppendElement(
    BluetoothNamedValue(NS_LITERAL_STRING("address"), remoteAddress));
  propertiesArray.AppendElement(
    BluetoothNamedValue(NS_LITERAL_STRING("status"), bonded));
  BluetoothSignal newSignal(NS_LITERAL_STRING(PAIRED_STATUS_CHANGED_ID),
                            NS_LITERAL_STRING(KEY_ADAPTER),
                            BluetoothValue(propertiesArray));
  NS_DispatchToMainThread(new DistributeBluetoothSignalTask(newSignal));

  if (bonded && !sBondingRunnableArray.IsEmpty()) {
    DispatchBluetoothReply(sBondingRunnableArray[0],
                           BluetoothValue(true), EmptyString());

    sBondingRunnableArray.RemoveElementAt(0);
  } else if (!bonded && !sUnbondingRunnableArray.IsEmpty()) {
    DispatchBluetoothReply(sUnbondingRunnableArray[0],
                           BluetoothValue(true), EmptyString());

    sUnbondingRunnableArray.RemoveElementAt(0);
  }
}

void VideoFrameContainer::SetCurrentFramesLocked(const gfx::IntSize& aIntrinsicSize,
        const nsTArray<ImageContainer::NonOwningImage>& aImages)
{
    mMutex.AssertCurrentThreadOwns();

    if (aIntrinsicSize != mIntrinsicSize) {
        mIntrinsicSize = aIntrinsicSize;
        mIntrinsicSizeChanged = true;
    }

    gfx::IntSize oldFrameSize = mImageContainer->GetCurrentSize();

    // When using the OMX decoder, destruction of the current image can indirectly
    //  block on main thread I/O. If we let this happen while holding onto
    //  |mImageContainer|'s lock, then when the main thread then tries to
    //  composite it can then block on |mImageContainer|'s lock, causing a
    //  deadlock. We use this hack to defer the destruction of the current image
    //  until it is safe.
    nsTArray<ImageContainer::OwningImage> oldImages;
    mImageContainer->GetCurrentImages(&oldImages);

    ImageContainer::FrameID lastFrameIDForOldPrincipalHandle =
        mFrameIDForPendingPrincipalHandle - 1;
    if (mPendingPrincipalHandle != PRINCIPAL_HANDLE_NONE &&
            ((!oldImages.IsEmpty() &&
              oldImages.LastElement().mFrameID >= lastFrameIDForOldPrincipalHandle) ||
             (!aImages.IsEmpty() &&
              aImages[0].mFrameID > lastFrameIDForOldPrincipalHandle))) {
        // We are releasing the last FrameID prior to `lastFrameIDForOldPrincipalHandle`
        // OR
        // there are no FrameIDs prior to `lastFrameIDForOldPrincipalHandle` in the new
        // set of images.
        // This means that the old principal handle has been flushed out and we can
        // notify our video element about this change.
        RefPtr<VideoFrameContainer> self = this;
        PrincipalHandle principalHandle = mPendingPrincipalHandle;
        mLastPrincipalHandle = mPendingPrincipalHandle;
        mPendingPrincipalHandle = PRINCIPAL_HANDLE_NONE;
        mFrameIDForPendingPrincipalHandle = 0;
        NS_DispatchToMainThread(NS_NewRunnableFunction([self, principalHandle]() {
            if (self->mElement) {
                self->mElement->PrincipalHandleChangedForVideoFrameContainer(self, principalHandle);
            }
        }));
    }

    if (aImages.IsEmpty()) {
        mImageContainer->ClearAllImages();
    } else {
        mImageContainer->SetCurrentImages(aImages);
    }
    gfx::IntSize newFrameSize = mImageContainer->GetCurrentSize();
    if (oldFrameSize != newFrameSize) {
        mImageSizeChanged = true;
    }
}

void
WebRenderAPI::GenerateFrame(const nsTArray<WrOpacityProperty>& aOpacityArray,
                            const nsTArray<WrTransformProperty>& aTransformArray)
{
  wr_api_generate_frame_with_properties(mWrApi,
                                        aOpacityArray.IsEmpty() ?
                                          nullptr : aOpacityArray.Elements(),
                                        aOpacityArray.Length(),
                                        aTransformArray.IsEmpty() ?
                                          nullptr : aTransformArray.Elements(),
                                        aTransformArray.Length());
}

static void
NextBluetoothProfileController()
{
  MOZ_ASSERT(NS_IsMainThread());

  // First, remove the task at the front which has been already done.
  NS_ENSURE_FALSE_VOID(sControllerArray.IsEmpty());
  sControllerArray.RemoveElementAt(0);
  // Re-check if the task array is empty, if it's not, the next task will begin.
  NS_ENSURE_FALSE_VOID(sControllerArray.IsEmpty());
  sControllerArray[0]->StartSession();
}

void
BluetoothServiceBluedroid::NextBluetoothProfileController()
{
  MOZ_ASSERT(NS_IsMainThread());

  // Remove the completed task at the head
  NS_ENSURE_FALSE_VOID(sControllerArray.IsEmpty());
  sControllerArray.RemoveElementAt(0);

  // Start the next task if task array is not empty
  if (!sControllerArray.IsEmpty()) {
    sControllerArray[0]->StartSession();
  }
}

void
GMPDecryptorParent::Decrypt(uint32_t aId,
                            const CryptoSample& aCrypto,
                            const nsTArray<uint8_t>& aBuffer)
{
  LOGV(("GMPDecryptorParent[%p]::Decrypt(id=%d)", this, aId));

  if (!mIsOpen) {
    NS_WARNING("Trying to use a dead GMP decrypter!");
    return;
  }

  // Caller should ensure parameters passed in are valid.
  MOZ_ASSERT(!aBuffer.IsEmpty());

  if (aCrypto.mValid) {
    GMPDecryptionData data(aCrypto.mKeyId,
                           aCrypto.mIV,
                           aCrypto.mPlainSizes,
                           aCrypto.mEncryptedSizes,
                           aCrypto.mSessionIds);

    Unused << SendDecrypt(aId, aBuffer, data);
  } else {
    GMPDecryptionData data;
    Unused << SendDecrypt(aId, aBuffer, data);
  }
}

void
nsHtml5TreeOpStage::MoveOpsAndSpeculativeLoadsTo(nsTArray<nsHtml5TreeOperation>& aOpQueue,
        nsTArray<nsHtml5SpeculativeLoad>& aSpeculativeLoadQueue)
{
    mozilla::MutexAutoLock autoLock(mMutex);
    if (aOpQueue.IsEmpty()) {
        mOpQueue.SwapElements(aOpQueue);
    } else {
        aOpQueue.MoveElementsFrom(mOpQueue);
    }
    if (aSpeculativeLoadQueue.IsEmpty()) {
        mSpeculativeLoadQueue.SwapElements(aSpeculativeLoadQueue);
    } else {
        aSpeculativeLoadQueue.MoveElementsFrom(mSpeculativeLoadQueue);
    }
}

NS_IMETHODIMP
PresentationService::ReconnectSession(const nsTArray<nsString>& aUrls,
                                      const nsAString& aSessionId,
                                      uint8_t aRole,
                                      nsIPresentationServiceCallback* aCallback)
{
  PRES_DEBUG("%s:id[%s]\n", __func__, NS_ConvertUTF16toUTF8(aSessionId).get());

  MOZ_ASSERT(NS_IsMainThread());
  MOZ_ASSERT(!aSessionId.IsEmpty());
  MOZ_ASSERT(aCallback);
  MOZ_ASSERT(!aUrls.IsEmpty());

  if (aRole != nsIPresentationService::ROLE_CONTROLLER) {
    MOZ_ASSERT(false, "Only controller can call ReconnectSession.");
    return NS_ERROR_INVALID_ARG;
  }

  if (NS_WARN_IF(!aCallback)) {
    return NS_ERROR_INVALID_ARG;
  }

  RefPtr<PresentationSessionInfo> info = GetSessionInfo(aSessionId, aRole);
  if (NS_WARN_IF(!info)) {
    return aCallback->NotifyError(NS_ERROR_DOM_NOT_FOUND_ERR);
  }

  if (NS_WARN_IF(!aUrls.Contains(info->GetUrl()))) {
    return aCallback->NotifyError(NS_ERROR_DOM_NOT_FOUND_ERR);
  }

  return static_cast<PresentationControllingInfo*>(info.get())->Reconnect(aCallback);
}

/* static */ void
SharedMessagePortMessage::FromSharedToMessagesChild(
                      MessagePortChild* aActor,
                      const nsTArray<nsRefPtr<SharedMessagePortMessage>>& aData,
                      nsTArray<MessagePortMessage>& aArray)
{
  MOZ_ASSERT(aActor);
  MOZ_ASSERT(aArray.IsEmpty());
  aArray.SetCapacity(aData.Length());

  PBackgroundChild* backgroundManager = aActor->Manager();
  MOZ_ASSERT(backgroundManager);

  for (auto& data : aData) {
    MessagePortMessage* message = aArray.AppendElement();
    message->data().SwapElements(data->mData);

    const nsTArray<nsRefPtr<BlobImpl>>& blobImpls = data->BlobImpls();
    if (!blobImpls.IsEmpty()) {
      message->blobsChild().SetCapacity(blobImpls.Length());

      for (uint32_t i = 0, len = blobImpls.Length(); i < len; ++i) {
        PBlobChild* blobChild =
          BackgroundChild::GetOrCreateActorForBlobImpl(backgroundManager,
                                                       blobImpls[i]);
        message->blobsChild().AppendElement(blobChild);
      }
    }

    message->transferredPorts().AppendElements(data->PortIdentifiers());
  }
}

nsresult
GfxInfo::GetFeatureStatusImpl(int32_t aFeature, 
                              int32_t *aStatus, 
                              nsAString & aSuggestedDriverVersion,
                              const nsTArray<GfxDriverInfo>& aDriverInfo, 
                              OperatingSystem* aOS /* = nullptr */)
{
  NS_ENSURE_ARG_POINTER(aStatus);
  aSuggestedDriverVersion.SetIsVoid(true);
  *aStatus = nsIGfxInfo::FEATURE_STATUS_UNKNOWN;
  OperatingSystem os = DRIVER_OS_ANDROID;
  if (aOS)
    *aOS = os;

  EnsureInitializedFromGfxInfoData();

  if (!mError.IsEmpty()) {
    *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DEVICE;
    return NS_OK;
  }

  // Don't evaluate special cases when evaluating the downloaded blocklist.
  if (aDriverInfo.IsEmpty()) {
    if (aFeature == FEATURE_WEBGL_OPENGL) {
      if (mRenderer.Find("Adreno 200") != -1 ||
          mRenderer.Find("Adreno 205") != -1)
      {
        *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DEVICE;
        return NS_OK;
      }
    }
  }

  return GfxInfoBase::GetFeatureStatusImpl(aFeature, aStatus, aSuggestedDriverVersion, aDriverInfo, &os);
}

void
FilePickerParent::SendFilesOrDirectories(const nsTArray<BlobImplOrString>& aData)
{
  if (mMode == nsIFilePicker::modeGetFolder) {
    MOZ_ASSERT(aData.Length() <= 1);
    if (aData.IsEmpty()) {
      Unused << Send__delete__(this, void_t(), mResult);
      return;
    }

    MOZ_ASSERT(aData[0].mType == BlobImplOrString::eDirectoryPath);

    InputDirectory input;
    input.directoryPath() = aData[0].mDirectoryPath;
    Unused << Send__delete__(this, input, mResult);
    return;
  }

  nsIContentParent* parent = TabParent::GetFrom(Manager())->Manager();
  InfallibleTArray<PBlobParent*> blobs;

  for (unsigned i = 0; i < aData.Length(); i++) {
    MOZ_ASSERT(aData[i].mType == BlobImplOrString::eBlobImpl);
    BlobParent* blobParent = parent->GetOrCreateActorForBlobImpl(aData[i].mBlobImpl);
    if (blobParent) {
      blobs.AppendElement(blobParent);
    }
  }

  InputBlobs inblobs;
  inblobs.blobsParent().SwapElements(blobs);
  Unused << Send__delete__(this, inblobs, mResult);
}

/**
 * AdapterPropertiesNotification will be called after enable() but
 * before AdapterStateChangeNotification is called. At that moment,
 * BluetoothManager and BluetoothAdapter, do not register observer
 * yet.
 */
void
BluetoothServiceBluedroid::AdapterPropertiesNotification(
  BluetoothStatus aStatus, int aNumProperties,
  const BluetoothProperty* aProperties)
{
  MOZ_ASSERT(NS_IsMainThread());

  InfallibleTArray<BluetoothNamedValue> propertiesArray;

  for (int i = 0; i < aNumProperties; i++) {

    const BluetoothProperty& p = aProperties[i];

    if (p.mType == PROPERTY_BDADDR) {
      sAdapterBdAddress = p.mString;
      BT_APPEND_NAMED_VALUE(propertiesArray, "Address", sAdapterBdAddress);

    } else if (p.mType == PROPERTY_BDNAME) {
      sAdapterBdName = p.mString;
      BT_APPEND_NAMED_VALUE(propertiesArray, "Name", sAdapterBdName);

    } else if (p.mType == PROPERTY_ADAPTER_SCAN_MODE) {
      sAdapterDiscoverable =
        (p.mScanMode == SCAN_MODE_CONNECTABLE_DISCOVERABLE);
      BT_APPEND_NAMED_VALUE(propertiesArray, "Discoverable",
                            sAdapterDiscoverable);

    } else if (p.mType == PROPERTY_ADAPTER_BONDED_DEVICES) {
      // We have to cache addresses of bonded devices. Unlike BlueZ,
      // Bluedroid would not send another PROPERTY_ADAPTER_BONDED_DEVICES
      // event after bond completed.
      BT_LOGD("Adapter property: BONDED_DEVICES. Count: %d",
              p.mStringArray.Length());

      // Whenever reloading paired devices, force refresh
      sAdapterBondedAddressArray.Clear();
      sAdapterBondedAddressArray.AppendElements(p.mStringArray);

      BT_APPEND_NAMED_VALUE(propertiesArray, "PairedDevices",
                            sAdapterBondedAddressArray);
    } else if (p.mType == PROPERTY_UNKNOWN) {
      /* Bug 1065999: working around unknown properties */
    } else {
      BT_LOGD("Unhandled adapter property type: %d", p.mType);
      continue;
    }
  }

  NS_ENSURE_TRUE_VOID(propertiesArray.Length() > 0);

  DistributeSignal(NS_LITERAL_STRING("PropertyChanged"),
                   NS_LITERAL_STRING(KEY_ADAPTER),
                   BluetoothValue(propertiesArray));

  // Send reply for SetProperty
  if (!sSetPropertyRunnableArray.IsEmpty()) {
    DispatchReplySuccess(sSetPropertyRunnableArray[0]);
    sSetPropertyRunnableArray.RemoveElementAt(0);
  }
}

void
nsWindow::DoDraw(void)
{
    if (!hal::GetScreenEnabled()) {
        gDrawRequest = true;
        return;
    }

    if (sTopWindows.IsEmpty()) {
        LOG("  no window to draw, bailing");
        return;
    }

    nsWindow *targetWindow = (nsWindow *)sTopWindows[0];
    while (targetWindow->GetLastChild())
        targetWindow = (nsWindow *)targetWindow->GetLastChild();

    nsIWidgetListener* listener = targetWindow->GetWidgetListener();
    if (listener) {
        listener->WillPaintWindow(targetWindow);
    }

    LayerManager* lm = targetWindow->GetLayerManager();
    if (mozilla::layers::LayersBackend::LAYERS_CLIENT == lm->GetBackendType()) {
      // No need to do anything, the compositor will handle drawing
    } else {
        NS_RUNTIMEABORT("Unexpected layer manager type");
    }

    listener = targetWindow->GetWidgetListener();
    if (listener) {
        listener->DidPaintWindow();
    }
}