@angular/cdk/esm2022/dialog/dialog.mjs

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { TemplateRef, Injectable, Injector, Inject, Optional, SkipSelf, } from '@angular/core';
import { ComponentPortal, TemplatePortal } from '@angular/cdk/portal';
import { of as observableOf, Subject, defer } from 'rxjs';
import { DialogRef } from './dialog-ref';
import { DialogConfig } from './dialog-config';
import { Directionality } from '@angular/cdk/bidi';
import { Overlay, OverlayRef, OverlayConfig, OverlayContainer, } from '@angular/cdk/overlay';
import { startWith } from 'rxjs/operators';
import { DEFAULT_DIALOG_CONFIG, DIALOG_DATA, DIALOG_SCROLL_STRATEGY } from './dialog-injectors';
import { CdkDialogContainer } from './dialog-container';
import * as i0 from "@angular/core";
import * as i1 from "@angular/cdk/overlay";
import * as i2 from "./dialog-config";
/** Unique id for the created dialog. */
let uniqueId = 0;
class Dialog {
    /** Keeps track of the currently-open dialogs. */
    get openDialogs() {
        return this._parentDialog ? this._parentDialog.openDialogs : this._openDialogsAtThisLevel;
    }
    /** Stream that emits when a dialog has been opened. */
    get afterOpened() {
        return this._parentDialog ? this._parentDialog.afterOpened : this._afterOpenedAtThisLevel;
    }
    constructor(_overlay, _injector, _defaultOptions, _parentDialog, _overlayContainer, scrollStrategy) {
        this._overlay = _overlay;
        this._injector = _injector;
        this._defaultOptions = _defaultOptions;
        this._parentDialog = _parentDialog;
        this._overlayContainer = _overlayContainer;
        this._openDialogsAtThisLevel = [];
        this._afterAllClosedAtThisLevel = new Subject();
        this._afterOpenedAtThisLevel = new Subject();
        this._ariaHiddenElements = new Map();
        /**
         * Stream that emits when all open dialog have finished closing.
         * Will emit on subscribe if there are no open dialogs to begin with.
         */
        this.afterAllClosed = defer(() => this.openDialogs.length
            ? this._getAfterAllClosed()
            : this._getAfterAllClosed().pipe(startWith(undefined)));
        this._scrollStrategy = scrollStrategy;
    }
    open(componentOrTemplateRef, config) {
        const defaults = (this._defaultOptions || new DialogConfig());
        config = { ...defaults, ...config };
        config.id = config.id || `cdk-dialog-${uniqueId++}`;
        if (config.id &&
            this.getDialogById(config.id) &&
            (typeof ngDevMode === 'undefined' || ngDevMode)) {
            throw Error(`Dialog with id "${config.id}" exists already. The dialog id must be unique.`);
        }
        const overlayConfig = this._getOverlayConfig(config);
        const overlayRef = this._overlay.create(overlayConfig);
        const dialogRef = new DialogRef(overlayRef, config);
        const dialogContainer = this._attachContainer(overlayRef, dialogRef, config);
        dialogRef.containerInstance = dialogContainer;
        this._attachDialogContent(componentOrTemplateRef, dialogRef, dialogContainer, config);
        // If this is the first dialog that we're opening, hide all the non-overlay content.
        if (!this.openDialogs.length) {
            this._hideNonDialogContentFromAssistiveTechnology();
        }
        this.openDialogs.push(dialogRef);
        dialogRef.closed.subscribe(() => this._removeOpenDialog(dialogRef, true));
        this.afterOpened.next(dialogRef);
        return dialogRef;
    }
    /**
     * Closes all of the currently-open dialogs.
     */
    closeAll() {
        reverseForEach(this.openDialogs, dialog => dialog.close());
    }
    /**
     * Finds an open dialog by its id.
     * @param id ID to use when looking up the dialog.
     */
    getDialogById(id) {
        return this.openDialogs.find(dialog => dialog.id === id);
    }
    ngOnDestroy() {
        // Make one pass over all the dialogs that need to be untracked, but should not be closed. We
        // want to stop tracking the open dialog even if it hasn't been closed, because the tracking
        // determines when `aria-hidden` is removed from elements outside the dialog.
        reverseForEach(this._openDialogsAtThisLevel, dialog => {
            // Check for `false` specifically since we want `undefined` to be interpreted as `true`.
            if (dialog.config.closeOnDestroy === false) {
                this._removeOpenDialog(dialog, false);
            }
        });
        // Make a second pass and close the remaining dialogs. We do this second pass in order to
        // correctly dispatch the `afterAllClosed` event in case we have a mixed array of dialogs
        // that should be closed and dialogs that should not.
        reverseForEach(this._openDialogsAtThisLevel, dialog => dialog.close());
        this._afterAllClosedAtThisLevel.complete();
        this._afterOpenedAtThisLevel.complete();
        this._openDialogsAtThisLevel = [];
    }
    /**
     * Creates an overlay config from a dialog config.
     * @param config The dialog configuration.
     * @returns The overlay configuration.
     */
    _getOverlayConfig(config) {
        const state = new OverlayConfig({
            positionStrategy: config.positionStrategy ||
                this._overlay.position().global().centerHorizontally().centerVertically(),
            scrollStrategy: config.scrollStrategy || this._scrollStrategy(),
            panelClass: config.panelClass,
            hasBackdrop: config.hasBackdrop,
            direction: config.direction,
            minWidth: config.minWidth,
            minHeight: config.minHeight,
            maxWidth: config.maxWidth,
            maxHeight: config.maxHeight,
            width: config.width,
            height: config.height,
            disposeOnNavigation: config.closeOnNavigation,
        });
        if (config.backdropClass) {
            state.backdropClass = config.backdropClass;
        }
        return state;
    }
    /**
     * 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.
     */
    _attachContainer(overlay, dialogRef, config) {
        const userInjector = config.injector || config.viewContainerRef?.injector;
        const providers = [
            { provide: DialogConfig, useValue: config },
            { provide: DialogRef, useValue: dialogRef },
            { provide: OverlayRef, useValue: overlay },
        ];
        let containerType;
        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 }), config.componentFactoryResolver);
        const containerRef = overlay.attach(containerPortal);
        return containerRef.instance;
    }
    /**
     * Attaches the user-provided component to the already-created dialog container.
     * @param componentOrTemplateRef The type of component being loaded into the dialog,
     *     or a TemplateRef to instantiate as the content.
     * @param dialogRef Reference to the dialog being opened.
     * @param dialogContainer Component that is going to wrap the dialog content.
     * @param config Configuration used to open the dialog.
     */
    _attachDialogContent(componentOrTemplateRef, dialogRef, dialogContainer, config) {
        if (componentOrTemplateRef instanceof TemplateRef) {
            const injector = this._createInjector(config, dialogRef, dialogContainer, undefined);
            let context = { $implicit: config.data, dialogRef };
            if (config.templateContext) {
                context = {
                    ...context,
                    ...(typeof config.templateContext === 'function'
                        ? config.templateContext()
                        : config.templateContext),
                };
            }
            dialogContainer.attachTemplatePortal(new TemplatePortal(componentOrTemplateRef, null, context, injector));
        }
        else {
            const injector = this._createInjector(config, dialogRef, dialogContainer, this._injector);
            const contentRef = dialogContainer.attachComponentPortal(new ComponentPortal(componentOrTemplateRef, config.viewContainerRef, injector, config.componentFactoryResolver));
            dialogRef.componentInstance = contentRef.instance;
        }
    }
    /**
     * Creates a custom injector to be used inside the dialog. This allows a component loaded inside
     * of a dialog to close itself and, optionally, to return a value.
     * @param config Config object that is used to construct the dialog.
     * @param dialogRef Reference to the dialog being opened.
     * @param dialogContainer Component that is going to wrap the dialog content.
     * @param fallbackInjector Injector to use as a fallback when a lookup fails in the custom
     * dialog injector, if the user didn't provide a custom one.
     * @returns The custom injector that can be used inside the dialog.
     */
    _createInjector(config, dialogRef, dialogContainer, fallbackInjector) {
        const userInjector = config.injector || config.viewContainerRef?.injector;
        const providers = [
            { provide: DIALOG_DATA, useValue: config.data },
            { provide: DialogRef, useValue: dialogRef },
        ];
        if (config.providers) {
            if (typeof config.providers === 'function') {
                providers.push(...config.providers(dialogRef, config, dialogContainer));
            }
            else {
                providers.push(...config.providers);
            }
        }
        if (config.direction &&
            (!userInjector ||
                !userInjector.get(Directionality, null, { optional: true }))) {
            providers.push({
                provide: Directionality,
                useValue: { value: config.direction, change: observableOf() },
            });
        }
        return Injector.create({ parent: userInjector || fallbackInjector, providers });
    }
    /**
     * Removes a dialog from the array of open dialogs.
     * @param dialogRef Dialog to be removed.
     * @param emitEvent Whether to emit an event if this is the last dialog.
     */
    _removeOpenDialog(dialogRef, emitEvent) {
        const index = this.openDialogs.indexOf(dialogRef);
        if (index > -1) {
            this.openDialogs.splice(index, 1);
            // If all the dialogs were closed, remove/restore the `aria-hidden`
            // to a the siblings and emit to the `afterAllClosed` stream.
            if (!this.openDialogs.length) {
                this._ariaHiddenElements.forEach((previousValue, element) => {
                    if (previousValue) {
                        element.setAttribute('aria-hidden', previousValue);
                    }
                    else {
                        element.removeAttribute('aria-hidden');
                    }
                });
                this._ariaHiddenElements.clear();
                if (emitEvent) {
                    this._getAfterAllClosed().next();
                }
            }
        }
    }
    /** Hides all of the content that isn't an overlay from assistive technology. */
    _hideNonDialogContentFromAssistiveTechnology() {
        const overlayContainer = this._overlayContainer.getContainerElement();
        // Ensure that the overlay container is attached to the DOM.
        if (overlayContainer.parentElement) {
            const siblings = overlayContainer.parentElement.children;
            for (let i = siblings.length - 1; i > -1; i--) {
                const sibling = siblings[i];
                if (sibling !== overlayContainer &&
                    sibling.nodeName !== 'SCRIPT' &&
                    sibling.nodeName !== 'STYLE' &&
                    !sibling.hasAttribute('aria-live')) {
                    this._ariaHiddenElements.set(sibling, sibling.getAttribute('aria-hidden'));
                    sibling.setAttribute('aria-hidden', 'true');
                }
            }
        }
    }
    _getAfterAllClosed() {
        const parent = this._parentDialog;
        return parent ? parent._getAfterAllClosed() : this._afterAllClosedAtThisLevel;
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.0.0", ngImport: i0, type: Dialog, deps: [{ token: i1.Overlay }, { token: i0.Injector }, { token: DEFAULT_DIALOG_CONFIG, optional: true }, { token: Dialog, optional: true, skipSelf: true }, { token: i1.OverlayContainer }, { token: DIALOG_SCROLL_STRATEGY }], target: i0.ɵɵFactoryTarget.Injectable }); }
    static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.0.0", ngImport: i0, type: Dialog }); }
}
export { Dialog };
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.0.0", ngImport: i0, type: Dialog, decorators: [{
            type: Injectable
        }], ctorParameters: function () { return [{ type: i1.Overlay }, { type: i0.Injector }, { type: i2.DialogConfig, decorators: [{
                    type: Optional
                }, {
                    type: Inject,
                    args: [DEFAULT_DIALOG_CONFIG]
                }] }, { type: Dialog, decorators: [{
                    type: Optional
                }, {
                    type: SkipSelf
                }] }, { type: i1.OverlayContainer }, { type: undefined, decorators: [{
                    type: Inject,
                    args: [DIALOG_SCROLL_STRATEGY]
                }] }]; } });
/**
 * Executes a callback against all elements in an array while iterating in reverse.
 * Useful if the array is being modified as it is being iterated.
 */
function reverseForEach(items, callback) {
    let i = items.length;
    while (i--) {
        callback(items[i]);
    }
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  TemplateRef,\n  Injectable,\n  Injector,\n  OnDestroy,\n  Type,\n  StaticProvider,\n  Inject,\n  Optional,\n  SkipSelf,\n} from '@angular/core';\nimport {BasePortalOutlet, ComponentPortal, TemplatePortal} from '@angular/cdk/portal';\nimport {of as observableOf, Observable, Subject, defer} from 'rxjs';\nimport {DialogRef} from './dialog-ref';\nimport {DialogConfig} from './dialog-config';\nimport {Directionality} from '@angular/cdk/bidi';\nimport {\n  ComponentType,\n  Overlay,\n  OverlayRef,\n  OverlayConfig,\n  ScrollStrategy,\n  OverlayContainer,\n} from '@angular/cdk/overlay';\nimport {startWith} from 'rxjs/operators';\n\nimport {DEFAULT_DIALOG_CONFIG, DIALOG_DATA, DIALOG_SCROLL_STRATEGY} from './dialog-injectors';\nimport {CdkDialogContainer} from './dialog-container';\n\n/** Unique id for the created dialog. */\nlet uniqueId = 0;\n\n@Injectable()\nexport class Dialog implements OnDestroy {\n  private _openDialogsAtThisLevel: DialogRef<any, any>[] = [];\n  private readonly _afterAllClosedAtThisLevel = new Subject<void>();\n  private readonly _afterOpenedAtThisLevel = new Subject<DialogRef>();\n  private _ariaHiddenElements = new Map<Element, string | null>();\n  private _scrollStrategy: () => ScrollStrategy;\n\n  /** Keeps track of the currently-open dialogs. */\n  get openDialogs(): readonly DialogRef<any, any>[] {\n    return this._parentDialog ? this._parentDialog.openDialogs : this._openDialogsAtThisLevel;\n  }\n\n  /** Stream that emits when a dialog has been opened. */\n  get afterOpened(): Subject<DialogRef<any, any>> {\n    return this._parentDialog ? this._parentDialog.afterOpened : this._afterOpenedAtThisLevel;\n  }\n\n  /**\n   * Stream that emits when all open dialog have finished closing.\n   * Will emit on subscribe if there are no open dialogs to begin with.\n   */\n  readonly afterAllClosed: Observable<void> = defer(() =>\n    this.openDialogs.length\n      ? this._getAfterAllClosed()\n      : this._getAfterAllClosed().pipe(startWith(undefined)),\n  );\n\n  constructor(\n    private _overlay: Overlay,\n    private _injector: Injector,\n    @Optional() @Inject(DEFAULT_DIALOG_CONFIG) private _defaultOptions: DialogConfig,\n    @Optional() @SkipSelf() private _parentDialog: Dialog,\n    private _overlayContainer: OverlayContainer,\n    @Inject(DIALOG_SCROLL_STRATEGY) scrollStrategy: any,\n  ) {\n    this._scrollStrategy = scrollStrategy;\n  }\n\n  /**\n   * Opens a modal dialog containing the given component.\n   * @param component Type of the component to load into the dialog.\n   * @param config Extra configuration options.\n   * @returns Reference to the newly-opened dialog.\n   */\n  open<R = unknown, D = unknown, C = unknown>(\n    component: ComponentType<C>,\n    config?: DialogConfig<D, DialogRef<R, C>>,\n  ): DialogRef<R, C>;\n\n  /**\n   * Opens a modal dialog containing the given template.\n   * @param template TemplateRef to instantiate as the dialog content.\n   * @param config Extra configuration options.\n   * @returns Reference to the newly-opened dialog.\n   */\n  open<R = unknown, D = unknown, C = unknown>(\n    template: TemplateRef<C>,\n    config?: DialogConfig<D, DialogRef<R, C>>,\n  ): DialogRef<R, C>;\n\n  open<R = unknown, D = unknown, C = unknown>(\n    componentOrTemplateRef: ComponentType<C> | TemplateRef<C>,\n    config?: DialogConfig<D, DialogRef<R, C>>,\n  ): DialogRef<R, C>;\n\n  open<R = unknown, D = unknown, C = unknown>(\n    componentOrTemplateRef: ComponentType<C> | TemplateRef<C>,\n    config?: DialogConfig<D, DialogRef<R, C>>,\n  ): DialogRef<R, C> {\n    const defaults = (this._defaultOptions || new DialogConfig()) as DialogConfig<\n      D,\n      DialogRef<R, C>\n    >;\n    config = {...defaults, ...config};\n    config.id = config.id || `cdk-dialog-${uniqueId++}`;\n\n    if (\n      config.id &&\n      this.getDialogById(config.id) &&\n      (typeof ngDevMode === 'undefined' || ngDevMode)\n    ) {\n      throw Error(`Dialog with id \"${config.id}\" exists already. The dialog id must be unique.`);\n    }\n\n    const overlayConfig = this._getOverlayConfig(config);\n    const overlayRef = this._overlay.create(overlayConfig);\n    const dialogRef = new DialogRef(overlayRef, config);\n    const dialogContainer = this._attachContainer(overlayRef, dialogRef, config);\n\n    (dialogRef as {containerInstance: BasePortalOutlet}).containerInstance = dialogContainer;\n    this._attachDialogContent(componentOrTemplateRef, dialogRef, dialogContainer, config);\n\n    // If this is the first dialog that we're opening, hide all the non-overlay content.\n    if (!this.openDialogs.length) {\n      this._hideNonDialogContentFromAssistiveTechnology();\n    }\n\n    (this.openDialogs as DialogRef<R, C>[]).push(dialogRef);\n    dialogRef.closed.subscribe(() => this._removeOpenDialog(dialogRef, true));\n    this.afterOpened.next(dialogRef);\n\n    return dialogRef;\n  }\n\n  /**\n   * Closes all of the currently-open dialogs.\n   */\n  closeAll(): void {\n    reverseForEach(this.openDialogs, dialog => dialog.close());\n  }\n\n  /**\n   * Finds an open dialog by its id.\n   * @param id ID to use when looking up the dialog.\n   */\n  getDialogById<R, C>(id: string): DialogRef<R, C> | undefined {\n    return this.openDialogs.find(dialog => dialog.id === id);\n  }\n\n  ngOnDestroy() {\n    // Make one pass over all the dialogs that need to be untracked, but should not be closed. We\n    // want to stop tracking the open dialog even if it hasn't been closed, because the tracking\n    // determines when `aria-hidden` is removed from elements outside the dialog.\n    reverseForEach(this._openDialogsAtThisLevel, dialog => {\n      // Check for `false` specifically since we want `undefined` to be interpreted as `true`.\n      if (dialog.config.closeOnDestroy === false) {\n        this._removeOpenDialog(dialog, false);\n      }\n    });\n\n    // Make a second pass and close the remaining dialogs. We do this second pass in order to\n    // correctly dispatch the `afterAllClosed` event in case we have a mixed array of dialogs\n    // that should be closed and dialogs that should not.\n    reverseForEach(this._openDialogsAtThisLevel, dialog => dialog.close());\n\n    this._afterAllClosedAtThisLevel.complete();\n    this._afterOpenedAtThisLevel.complete();\n    this._openDialogsAtThisLevel = [];\n  }\n\n  /**\n   * Creates an overlay config from a dialog config.\n   * @param config The dialog configuration.\n   * @returns The overlay configuration.\n   */\n  private _getOverlayConfig<D, R>(config: DialogConfig<D, R>): OverlayConfig {\n    const state = new OverlayConfig({\n      positionStrategy:\n        config.positionStrategy ||\n        this._overlay.position().global().centerHorizontally().centerVertically(),\n      scrollStrategy: config.scrollStrategy || this._scrollStrategy(),\n      panelClass: config.panelClass,\n      hasBackdrop: config.hasBackdrop,\n      direction: config.direction,\n      minWidth: config.minWidth,\n      minHeight: config.minHeight,\n      maxWidth: config.maxWidth,\n      maxHeight: config.maxHeight,\n      width: config.width,\n      height: config.height,\n      disposeOnNavigation: config.closeOnNavigation,\n    });\n\n    if (config.backdropClass) {\n      state.backdropClass = config.backdropClass;\n    }\n\n    return state;\n  }\n\n  /**\n   * Attaches a dialog container to a dialog's already-created overlay.\n   * @param overlay Reference to the dialog's underlying overlay.\n   * @param config The dialog configuration.\n   * @returns A promise resolving to a ComponentRef for the attached container.\n   */\n  private _attachContainer<R, D, C>(\n    overlay: OverlayRef,\n    dialogRef: DialogRef<R, C>,\n    config: DialogConfig<D, DialogRef<R, C>>,\n  ): BasePortalOutlet {\n    const userInjector = config.injector || config.viewContainerRef?.injector;\n    const providers: StaticProvider[] = [\n      {provide: DialogConfig, useValue: config},\n      {provide: DialogRef, useValue: dialogRef},\n      {provide: OverlayRef, useValue: overlay},\n    ];\n    let containerType: Type<BasePortalOutlet>;\n\n    if (config.container) {\n      if (typeof config.container === 'function') {\n        containerType = config.container;\n      } else {\n        containerType = config.container.type;\n        providers.push(...config.container.providers(config));\n      }\n    } else {\n      containerType = CdkDialogContainer;\n    }\n\n    const containerPortal = new ComponentPortal(\n      containerType,\n      config.viewContainerRef,\n      Injector.create({parent: userInjector || this._injector, providers}),\n      config.componentFactoryResolver,\n    );\n    const containerRef = overlay.attach(containerPortal);\n\n    return containerRef.instance;\n  }\n\n  /**\n   * Attaches the user-provided component to the already-created dialog container.\n   * @param componentOrTemplateRef The type of component being loaded into the dialog,\n   *     or a TemplateRef to instantiate as the content.\n   * @param dialogRef Reference to the dialog being opened.\n   * @param dialogContainer Component that is going to wrap the dialog content.\n   * @param config Configuration used to open the dialog.\n   */\n  private _attachDialogContent<R, D, C>(\n    componentOrTemplateRef: ComponentType<C> | TemplateRef<C>,\n    dialogRef: DialogRef<R, C>,\n    dialogContainer: BasePortalOutlet,\n    config: DialogConfig<D, DialogRef<R, C>>,\n  ) {\n    if (componentOrTemplateRef instanceof TemplateRef) {\n      const injector = this._createInjector(config, dialogRef, dialogContainer, undefined);\n      let context: any = {$implicit: config.data, dialogRef};\n\n      if (config.templateContext) {\n        context = {\n          ...context,\n          ...(typeof config.templateContext === 'function'\n            ? config.templateContext()\n            : config.templateContext),\n        };\n      }\n\n      dialogContainer.attachTemplatePortal(\n        new TemplatePortal<C>(componentOrTemplateRef, null!, context, injector),\n      );\n    } else {\n      const injector = this._createInjector(config, dialogRef, dialogContainer, this._injector);\n      const contentRef = dialogContainer.attachComponentPortal<C>(\n        new ComponentPortal(\n          componentOrTemplateRef,\n          config.viewContainerRef,\n          injector,\n          config.componentFactoryResolver,\n        ),\n      );\n      (dialogRef as {componentInstance: C}).componentInstance = contentRef.instance;\n    }\n  }\n\n  /**\n   * Creates a custom injector to be used inside the dialog. This allows a component loaded inside\n   * of a dialog to close itself and, optionally, to return a value.\n   * @param config Config object that is used to construct the dialog.\n   * @param dialogRef Reference to the dialog being opened.\n   * @param dialogContainer Component that is going to wrap the dialog content.\n   * @param fallbackInjector Injector to use as a fallback when a lookup fails in the custom\n   * dialog injector, if the user didn't provide a custom one.\n   * @returns The custom injector that can be used inside the dialog.\n   */\n  private _createInjector<R, D, C>(\n    config: DialogConfig<D, DialogRef<R, C>>,\n    dialogRef: DialogRef<R, C>,\n    dialogContainer: BasePortalOutlet,\n    fallbackInjector: Injector | undefined,\n  ): Injector {\n    const userInjector = config.injector || config.viewContainerRef?.injector;\n    const providers: StaticProvider[] = [\n      {provide: DIALOG_DATA, useValue: config.data},\n      {provide: DialogRef, useValue: dialogRef},\n    ];\n\n    if (config.providers) {\n      if (typeof config.providers === 'function') {\n        providers.push(...config.providers(dialogRef, config, dialogContainer));\n      } else {\n        providers.push(...config.providers);\n      }\n    }\n\n    if (\n      config.direction &&\n      (!userInjector ||\n        !userInjector.get<Directionality | null>(Directionality, null, {optional: true}))\n    ) {\n      providers.push({\n        provide: Directionality,\n        useValue: {value: config.direction, change: observableOf()},\n      });\n    }\n\n    return Injector.create({parent: userInjector || fallbackInjector, providers});\n  }\n\n  /**\n   * Removes a dialog from the array of open dialogs.\n   * @param dialogRef Dialog to be removed.\n   * @param emitEvent Whether to emit an event if this is the last dialog.\n   */\n  private _removeOpenDialog<R, C>(dialogRef: DialogRef<R, C>, emitEvent: boolean) {\n    const index = this.openDialogs.indexOf(dialogRef);\n\n    if (index > -1) {\n      (this.openDialogs as DialogRef<R, C>[]).splice(index, 1);\n\n      // If all the dialogs were closed, remove/restore the `aria-hidden`\n      // to a the siblings and emit to the `afterAllClosed` stream.\n      if (!this.openDialogs.length) {\n        this._ariaHiddenElements.forEach((previousValue, element) => {\n          if (previousValue) {\n            element.setAttribute('aria-hidden', previousValue);\n          } else {\n            element.removeAttribute('aria-hidden');\n          }\n        });\n\n        this._ariaHiddenElements.clear();\n\n        if (emitEvent) {\n          this._getAfterAllClosed().next();\n        }\n      }\n    }\n  }\n\n  /** Hides all of the content that isn't an overlay from assistive technology. */\n  private _hideNonDialogContentFromAssistiveTechnology() {\n    const overlayContainer = this._overlayContainer.getContainerElement();\n\n    // Ensure that the overlay container is attached to the DOM.\n    if (overlayContainer.parentElement) {\n      const siblings = overlayContainer.parentElement.children;\n\n      for (let i = siblings.length - 1; i > -1; i--) {\n        const sibling = siblings[i];\n\n        if (\n          sibling !== overlayContainer &&\n          sibling.nodeName !== 'SCRIPT' &&\n          sibling.nodeName !== 'STYLE' &&\n          !sibling.hasAttribute('aria-live')\n        ) {\n          this._ariaHiddenElements.set(sibling, sibling.getAttribute('aria-hidden'));\n          sibling.setAttribute('aria-hidden', 'true');\n        }\n      }\n    }\n  }\n\n  private _getAfterAllClosed(): Subject<void> {\n    const parent = this._parentDialog;\n    return parent ? parent._getAfterAllClosed() : this._afterAllClosedAtThisLevel;\n  }\n}\n\n/**\n * Executes a callback against all elements in an array while iterating in reverse.\n * Useful if the array is being modified as it is being iterated.\n */\nfunction reverseForEach<T>(items: T[] | readonly T[], callback: (current: T) => void) {\n  let i = items.length;\n\n  while (i--) {\n    callback(items[i]);\n  }\n}\n"]}