Class ApplicationRef

packages/core/src/application/application_ref.ts:254–821

 */
@Service()
export class ApplicationRef {
  /** @internal */
  _runningTick: boolean = false;
  private _destroyed = false;
  private _destroyListeners: Array<() => void> = [];
  /** @internal */
  _views: InternalViewRef<unknown>[] = [];
  private readonly internalErrorHandler = inject(INTERNAL_APPLICATION_ERROR_HANDLER);
  private readonly afterRenderManager = inject(AfterRenderManager);
  private readonly zonelessEnabled = inject(ZONELESS_ENABLED);
  private readonly rootEffectScheduler = inject(EffectScheduler);

  /**
   * Current dirty state of the application across a number of dimensions (views, afterRender hooks,
   * etc).
   *
   * A flag set here means that `tick()` will attempt to resolve the dirtiness when executed.
   *
   * @internal
   */
  dirtyFlags = ApplicationRefDirtyFlags.None;

  /**
   * Most recent snapshot from the `TracingService`, if any.
   *
   * This snapshot attempts to capture the context when `tick()` was first
   * scheduled. It then runs wrapped in this context.
   *
   * @internal
   */
  tracingSnapshot: TracingSnapshot | null = null;

  // Needed for ComponentFixture temporarily during migration of autoDetect behavior
  // Eventually the hostView of the fixture should just attach to ApplicationRef.
  private allTestViews: Set<InternalViewRef<unknown>> = new Set();
  private autoDetectTestViews: Set<InternalViewRef<unknown>> = new Set();
  /** @internal */
  includeAllTestViews = false;
  /** @internal */
  afterTick = new Subject<void>();
  /** @internal */
  get allViews(): Array<InternalViewRef<unknown>> {
    return [
      ...(this.includeAllTestViews ? this.allTestViews : this.autoDetectTestViews).keys(),
      ...this._views,
    ];
  }

  /**
   * Indicates whether this instance was destroyed.
   */
  get destroyed() {
    return this._destroyed;
  }

  /**
   * Get a list of component types registered to this application.
   * This list is populated even before the component is created.