bwikbs / engine Goto Github PK

std::unique_ptr<AndroidShellHolder> AndroidShellHolder::Spawn(
    std::shared_ptr<PlatformViewAndroidJNI> jni_facade,
    const std::string& entrypoint,
    const std::string& libraryUrl) const {
  FML_DCHECK(shell_ && shell_->IsSetup())
      << "A new Shell can only be spawned "
         "if the current Shell is properly constructed";

  // Pull out the new PlatformViewAndroid from the new Shell to feed to it to
  // the new AndroidShellHolder.
  //
  // It's a weak pointer because it's owned by the Shell (which we're also)
  // making below. And the AndroidShellHolder then owns the Shell.
  fml::WeakPtr<PlatformViewAndroid> weak_platform_view;

  // Take out the old AndroidContext to reuse inside the PlatformViewAndroid
  // of the new Shell.
  PlatformViewAndroid* android_platform_view = platform_view_.get();
  // There's some indirection with platform_view_ being a weak pointer but
  // we just checked that the shell_ exists above and a valid shell is the
  // owner of the platform view so this weak pointer always exists.
  FML_DCHECK(android_platform_view);
  std::shared_ptr<flutter::AndroidContext> android_context =
      android_platform_view->GetAndroidContext();
  FML_DCHECK(android_context);

  // This is a synchronous call, so the captures don't have race checks.
  Shell::CreateCallback<PlatformView> on_create_platform_view =
      [&jni_facade, android_context, &weak_platform_view](Shell& shell) {
        std::unique_ptr<PlatformViewAndroid> platform_view_android;
        platform_view_android = std::make_unique<PlatformViewAndroid>(
            shell,                   // delegate
            shell.GetTaskRunners(),  // task runners
            jni_facade,              // JNI interop
            android_context          // Android context
        );
        weak_platform_view = platform_view_android->GetWeakPtr();
        auto display = Display(jni_facade->GetDisplayRefreshRate());
        shell.OnDisplayUpdates(DisplayUpdateType::kStartup, {display});
        return platform_view_android;
      };

  Shell::CreateCallback<Rasterizer> on_create_rasterizer = [](Shell& shell) {
    return std::make_unique<Rasterizer>(shell);
  };