Method _attachContainer

src/cdk/dialog/dialog.ts:238–270

* Attaches a dialog container to a dialog's already-created overlay. * @param overlay Reference to the dialog's underlying overlay. * @param config The dialog configuration. * @returns A promise resolving to a ComponentRef for the attached container.

(
    overlay: OverlayRef,
    dialogRef: DialogRef<R, C>,
    config: DialogConfig<D, DialogRef<R, C>>,
  )

   * @returns A promise resolving to a ComponentRef for the attached container.
   */
  private _attachContainer<R, D, C>(
    overlay: OverlayRef,
    dialogRef: DialogRef<R, C>,
    config: DialogConfig<D, DialogRef<R, C>>,
  ): DialogContainer {
    const userInjector = config.injector || config.viewContainerRef?.injector;
    const providers: StaticProvider[] = [
      {provide: DialogConfig, useValue: config},
      {provide: DialogRef, useValue: dialogRef},
      {provide: OverlayRef, useValue: overlay},
    ];
    let containerType: Type<DialogContainer>;

    if (config.container) {
      if (typeof config.container === 'function') {
        containerType = config.container;
      } else {
        containerType = config.container.type;
        providers.push(...config.container.providers(config));
      }
    } else {
      containerType = CdkDialogContainer;
    }

    const containerPortal = new ComponentPortal(
      containerType,
      config.viewContainerRef,
      Injector.create({parent: userInjector || this._injector, providers}),
    );
    const containerRef = overlay.attach(containerPortal);

    return containerRef.instance;
  }

  /**
   * Attaches the user-provided component to the already-created dialog container.