/**
 * @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 { __assign } from "tslib";
import { Directionality } from '@angular/cdk/bidi';
import { Overlay, OverlayConfig, OverlayContainer, } from '@angular/cdk/overlay';
import { ComponentPortal, PortalInjector, TemplatePortal } from '@angular/cdk/portal';
import { Location } from '@angular/common';
import { Inject, Injectable, InjectionToken, Injector, Optional, SkipSelf, TemplateRef, } from '@angular/core';
import { defer, of as observableOf, Subject } from 'rxjs';
import { startWith } from 'rxjs/operators';
import { MatDialogConfig } from './dialog-config';
import { MatDialogContainer } from './dialog-container';
import { MatDialogRef } from './dialog-ref';
/** Injection token that can be used to access the data that was passed in to a dialog. */
export var MAT_DIALOG_DATA = new InjectionToken('MatDialogData');
/** Injection token that can be used to specify default dialog options. */
export var MAT_DIALOG_DEFAULT_OPTIONS = new InjectionToken('mat-dialog-default-options');
/** Injection token that determines the scroll handling while the dialog is open. */
export var MAT_DIALOG_SCROLL_STRATEGY = new InjectionToken('mat-dialog-scroll-strategy');
/** @docs-private */
export function MAT_DIALOG_SCROLL_STRATEGY_FACTORY(overlay) {
    return function () { return overlay.scrollStrategies.block(); };
}
/** @docs-private */
export function MAT_DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay) {
    return function () { return overlay.scrollStrategies.block(); };
}
/** @docs-private */
export var MAT_DIALOG_SCROLL_STRATEGY_PROVIDER = {
    provide: MAT_DIALOG_SCROLL_STRATEGY,
    deps: [Overlay],
    useFactory: MAT_DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY,
};
/**
 * Service to open Material Design modal dialogs.
 */
var MatDialog = /** @class */ (function () {
    function MatDialog(_overlay, _injector, 
    /**
     * @deprecated `_location` parameter to be removed.
     * @breaking-change 10.0.0
     */
    _location, _defaultOptions, scrollStrategy, _parentDialog, _overlayContainer) {
        var _this = this;
        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();
        // TODO (jelbourn): tighten the typing right-hand side of this expression.
        /**
         * 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(function () { return _this.openDialogs.length ?
            _this._afterAllClosed :
            _this._afterAllClosed.pipe(startWith(undefined)); });
        this._scrollStrategy = scrollStrategy;
    }
    Object.defineProperty(MatDialog.prototype, "openDialogs", {
        /** Keeps track of the currently-open dialogs. */
        get: function () {
            return this._parentDialog ? this._parentDialog.openDialogs : this._openDialogsAtThisLevel;
        },
        enumerable: true,
        configurable: true
    });
    Object.defineProperty(MatDialog.prototype, "afterOpened", {
        /** Stream that emits when a dialog has been opened. */
        get: function () {
            return this._parentDialog ? this._parentDialog.afterOpened : this._afterOpenedAtThisLevel;
        },
        enumerable: true,
        configurable: true
    });
    Object.defineProperty(MatDialog.prototype, "_afterAllClosed", {
        get: function () {
            var parent = this._parentDialog;
            return parent ? parent._afterAllClosed : this._afterAllClosedAtThisLevel;
        },
        enumerable: true,
        configurable: true
    });
    /**
     * Opens a modal dialog containing the given component.
     * @param componentOrTemplateRef Type of the component to load into the dialog,
     *     or a TemplateRef to instantiate as the dialog content.
     * @param config Extra configuration options.
     * @returns Reference to the newly-opened dialog.
     */
    MatDialog.prototype.open = function (componentOrTemplateRef, config) {
        var _this = this;
        config = _applyConfigDefaults(config, this._defaultOptions || new MatDialogConfig());
        if (config.id && this.getDialogById(config.id)) {
            throw Error("Dialog with id \"" + config.id + "\" exists already. The dialog id must be unique.");
        }
        var overlayRef = this._createOverlay(config);
        var dialogContainer = this._attachDialogContainer(overlayRef, config);
        var dialogRef = this._attachDialogContent(componentOrTemplateRef, dialogContainer, overlayRef, 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.afterClosed().subscribe(function () { return _this._removeOpenDialog(dialogRef); });
        this.afterOpened.next(dialogRef);
        return dialogRef;
    };
    /**
     * Closes all of the currently-open dialogs.
     */
    MatDialog.prototype.closeAll = function () {
        this._closeDialogs(this.openDialogs);
    };
    /**
     * Finds an open dialog by its id.
     * @param id ID to use when looking up the dialog.
     */
    MatDialog.prototype.getDialogById = function (id) {
        return this.openDialogs.find(function (dialog) { return dialog.id === id; });
    };
    MatDialog.prototype.ngOnDestroy = function () {
        // Only close the dialogs at this level on destroy
        // since the parent service may still be active.
        this._closeDialogs(this._openDialogsAtThisLevel);
        this._afterAllClosedAtThisLevel.complete();
        this._afterOpenedAtThisLevel.complete();
    };
    /**
     * Creates the overlay into which the dialog will be loaded.
     * @param config The dialog configuration.
     * @returns A promise resolving to the OverlayRef for the created overlay.
     */
    MatDialog.prototype._createOverlay = function (config) {
        var overlayConfig = this._getOverlayConfig(config);
        return this._overlay.create(overlayConfig);
    };
    /**
     * Creates an overlay config from a dialog config.
     * @param dialogConfig The dialog configuration.
     * @returns The overlay configuration.
     */
    MatDialog.prototype._getOverlayConfig = function (dialogConfig) {
        var state = new OverlayConfig({
            positionStrategy: this._overlay.position().global(),
            scrollStrategy: dialogConfig.scrollStrategy || this._scrollStrategy(),
            panelClass: dialogConfig.panelClass,
            hasBackdrop: dialogConfig.hasBackdrop,
            direction: dialogConfig.direction,
            minWidth: dialogConfig.minWidth,
            minHeight: dialogConfig.minHeight,
            maxWidth: dialogConfig.maxWidth,
            maxHeight: dialogConfig.maxHeight,
            disposeOnNavigation: dialogConfig.closeOnNavigation
        });
        if (dialogConfig.backdropClass) {
            state.backdropClass = dialogConfig.backdropClass;
        }
        return state;
    };
    /**
     * Attaches an MatDialogContainer 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.
     */
    MatDialog.prototype._attachDialogContainer = function (overlay, config) {
        var userInjector = config && config.viewContainerRef && config.viewContainerRef.injector;
        var injector = new PortalInjector(userInjector || this._injector, new WeakMap([
            [MatDialogConfig, config]
        ]));
        var containerPortal = new ComponentPortal(MatDialogContainer, config.viewContainerRef, injector, config.componentFactoryResolver);
        var containerRef = overlay.attach(containerPortal);
        return containerRef.instance;
    };
    /**
     * Attaches the user-provided component to the already-created MatDialogContainer.
     * @param componentOrTemplateRef The type of component being loaded into the dialog,
     *     or a TemplateRef to instantiate as the content.
     * @param dialogContainer Reference to the wrapping MatDialogContainer.
     * @param overlayRef Reference to the overlay in which the dialog resides.
     * @param config The dialog configuration.
     * @returns A promise resolving to the MatDialogRef that should be returned to the user.
     */
    MatDialog.prototype._attachDialogContent = function (componentOrTemplateRef, dialogContainer, overlayRef, config) {
        // Create a reference to the dialog we're creating in order to give the user a handle
        // to modify and close it.
        var dialogRef = new MatDialogRef(overlayRef, dialogContainer, config.id);
        // When the dialog backdrop is clicked, we want to close it.
        if (config.hasBackdrop) {
            overlayRef.backdropClick().subscribe(function () {
                if (!dialogRef.disableClose) {
                    dialogRef.close();
                }
            });
        }
        if (componentOrTemplateRef instanceof TemplateRef) {
            dialogContainer.attachTemplatePortal(new TemplatePortal(componentOrTemplateRef, null, { $implicit: config.data, dialogRef: dialogRef }));
        }
        else {
            var injector = this._createInjector(config, dialogRef, dialogContainer);
            var contentRef = dialogContainer.attachComponentPortal(new ComponentPortal(componentOrTemplateRef, config.viewContainerRef, injector));
            dialogRef.componentInstance = contentRef.instance;
        }
        dialogRef
            .updateSize(config.width, config.height)
            .updatePosition(config.position);
        return dialogRef;
    };
    /**
     * 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.
     * @param container Dialog container element that wraps all of the contents.
     * @returns The custom injector that can be used inside the dialog.
     */
    MatDialog.prototype._createInjector = function (config, dialogRef, dialogContainer) {
        var userInjector = config && config.viewContainerRef && config.viewContainerRef.injector;
        // The MatDialogContainer is injected in the portal as the MatDialogContainer and the dialog's
        // content are created out of the same ViewContainerRef and as such, are siblings for injector
        // purposes. To allow the hierarchy that is expected, the MatDialogContainer is explicitly
        // added to the injection tokens.
        var injectionTokens = new WeakMap([
            [MatDialogContainer, dialogContainer],
            [MAT_DIALOG_DATA, config.data],
            [MatDialogRef, dialogRef]
        ]);
        if (config.direction &&
            (!userInjector || !userInjector.get(Directionality, null))) {
            injectionTokens.set(Directionality, {
                value: config.direction,
                change: observableOf()
            });
        }
        return new PortalInjector(userInjector || this._injector, injectionTokens);
    };
    /**
     * Removes a dialog from the array of open dialogs.
     * @param dialogRef Dialog to be removed.
     */
    MatDialog.prototype._removeOpenDialog = function (dialogRef) {
        var 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(function (previousValue, element) {
                    if (previousValue) {
                        element.setAttribute('aria-hidden', previousValue);
                    }
                    else {
                        element.removeAttribute('aria-hidden');
                    }
                });
                this._ariaHiddenElements.clear();
                this._afterAllClosed.next();
            }
        }
    };
    /**
     * Hides all of the content that isn't an overlay from assistive technology.
     */
    MatDialog.prototype._hideNonDialogContentFromAssistiveTechnology = function () {
        var overlayContainer = this._overlayContainer.getContainerElement();
        // Ensure that the overlay container is attached to the DOM.
        if (overlayContainer.parentElement) {
            var siblings = overlayContainer.parentElement.children;
            for (var i = siblings.length - 1; i > -1; i--) {
                var 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');
                }
            }
        }
    };
    /** Closes all of the dialogs in an array. */
    MatDialog.prototype._closeDialogs = function (dialogs) {
        var i = dialogs.length;
        while (i--) {
            // The `_openDialogs` property isn't updated after close until the rxjs subscription
            // runs on the next microtask, in addition to modifying the array as we're going
            // through it. We loop through all of them and call close without assuming that
            // they'll be removed from the list instantaneously.
            dialogs[i].close();
        }
    };
    MatDialog.decorators = [
        { type: Injectable }
    ];
    /** @nocollapse */
    MatDialog.ctorParameters = function () { return [
        { type: Overlay },
        { type: Injector },
        { type: Location, decorators: [{ type: Optional }] },
        { type: MatDialogConfig, decorators: [{ type: Optional }, { type: Inject, args: [MAT_DIALOG_DEFAULT_OPTIONS,] }] },
        { type: undefined, decorators: [{ type: Inject, args: [MAT_DIALOG_SCROLL_STRATEGY,] }] },
        { type: MatDialog, decorators: [{ type: Optional }, { type: SkipSelf }] },
        { type: OverlayContainer }
    ]; };
    return MatDialog;
}());
export { MatDialog };
/**
 * Applies default options to the dialog config.
 * @param config Config to be modified.
 * @param defaultOptions Default options provided.
 * @returns The new configuration object.
 */
function _applyConfigDefaults(config, defaultOptions) {
    return __assign(__assign({}, defaultOptions), config);
}
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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 {Directionality} from '@angular/cdk/bidi';\nimport {\n  Overlay,\n  OverlayConfig,\n  OverlayContainer,\n  OverlayRef,\n  ScrollStrategy,\n} from '@angular/cdk/overlay';\nimport {ComponentPortal, ComponentType, PortalInjector, TemplatePortal} from '@angular/cdk/portal';\nimport {Location} from '@angular/common';\nimport {\n  Inject,\n  Injectable,\n  InjectionToken,\n  Injector,\n  OnDestroy,\n  Optional,\n  SkipSelf,\n  TemplateRef,\n} from '@angular/core';\nimport {defer, Observable, of as observableOf, Subject} from 'rxjs';\nimport {startWith} from 'rxjs/operators';\nimport {MatDialogConfig} from './dialog-config';\nimport {MatDialogContainer} from './dialog-container';\nimport {MatDialogRef} from './dialog-ref';\n\n\n/** Injection token that can be used to access the data that was passed in to a dialog. */\nexport const MAT_DIALOG_DATA = new InjectionToken<any>('MatDialogData');\n\n/** Injection token that can be used to specify default dialog options. */\nexport const MAT_DIALOG_DEFAULT_OPTIONS =\n    new InjectionToken<MatDialogConfig>('mat-dialog-default-options');\n\n/** Injection token that determines the scroll handling while the dialog is open. */\nexport const MAT_DIALOG_SCROLL_STRATEGY =\n    new InjectionToken<() => ScrollStrategy>('mat-dialog-scroll-strategy');\n\n/** @docs-private */\nexport function MAT_DIALOG_SCROLL_STRATEGY_FACTORY(overlay: Overlay): () => ScrollStrategy {\n  return () => overlay.scrollStrategies.block();\n}\n\n/** @docs-private */\nexport function MAT_DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay: Overlay):\n  () => ScrollStrategy {\n  return () => overlay.scrollStrategies.block();\n}\n\n/** @docs-private */\nexport const MAT_DIALOG_SCROLL_STRATEGY_PROVIDER = {\n  provide: MAT_DIALOG_SCROLL_STRATEGY,\n  deps: [Overlay],\n  useFactory: MAT_DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY,\n};\n\n\n/**\n * Service to open Material Design modal dialogs.\n */\n@Injectable()\nexport class MatDialog implements OnDestroy {\n  private _openDialogsAtThisLevel: MatDialogRef<any>[] = [];\n  private readonly _afterAllClosedAtThisLevel = new Subject<void>();\n  private readonly _afterOpenedAtThisLevel = new Subject<MatDialogRef<any>>();\n  private _ariaHiddenElements = new Map<Element, string|null>();\n  private _scrollStrategy: () => ScrollStrategy;\n\n  /** Keeps track of the currently-open dialogs. */\n  get openDialogs(): MatDialogRef<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<MatDialogRef<any>> {\n    return this._parentDialog ? this._parentDialog.afterOpened : this._afterOpenedAtThisLevel;\n  }\n\n  get _afterAllClosed(): Subject<void> {\n    const parent = this._parentDialog;\n    return parent ? parent._afterAllClosed : this._afterAllClosedAtThisLevel;\n  }\n\n  // TODO (jelbourn): tighten the typing right-hand side of this expression.\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(() => this.openDialogs.length ?\n      this._afterAllClosed :\n      this._afterAllClosed.pipe(startWith(undefined))) as Observable<any>;\n\n  constructor(\n      private _overlay: Overlay,\n      private _injector: Injector,\n      /**\n       * @deprecated `_location` parameter to be removed.\n       * @breaking-change 10.0.0\n       */\n      @Optional() _location: Location,\n      @Optional() @Inject(MAT_DIALOG_DEFAULT_OPTIONS) private _defaultOptions: MatDialogConfig,\n      @Inject(MAT_DIALOG_SCROLL_STRATEGY) scrollStrategy: any,\n      @Optional() @SkipSelf() private _parentDialog: MatDialog,\n      private _overlayContainer: OverlayContainer) {\n    this._scrollStrategy = scrollStrategy;\n  }\n\n  /**\n   * Opens a modal dialog containing the given component.\n   * @param componentOrTemplateRef Type of the component to load into the dialog,\n   *     or a TemplateRef to instantiate as the dialog content.\n   * @param config Extra configuration options.\n   * @returns Reference to the newly-opened dialog.\n   */\n  open<T, D = any, R = any>(componentOrTemplateRef: ComponentType<T> | TemplateRef<T>,\n          config?: MatDialogConfig<D>): MatDialogRef<T, R> {\n\n    config = _applyConfigDefaults(config, this._defaultOptions || new MatDialogConfig());\n\n    if (config.id && this.getDialogById(config.id)) {\n      throw Error(`Dialog with id \"${config.id}\" exists already. The dialog id must be unique.`);\n    }\n\n    const overlayRef = this._createOverlay(config);\n    const dialogContainer = this._attachDialogContainer(overlayRef, config);\n    const dialogRef = this._attachDialogContent<T, R>(componentOrTemplateRef,\n                                                      dialogContainer,\n                                                      overlayRef,\n                                                      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.push(dialogRef);\n    dialogRef.afterClosed().subscribe(() => this._removeOpenDialog(dialogRef));\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    this._closeDialogs(this.openDialogs);\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(id: string): MatDialogRef<any> | undefined {\n    return this.openDialogs.find(dialog => dialog.id === id);\n  }\n\n  ngOnDestroy() {\n    // Only close the dialogs at this level on destroy\n    // since the parent service may still be active.\n    this._closeDialogs(this._openDialogsAtThisLevel);\n    this._afterAllClosedAtThisLevel.complete();\n    this._afterOpenedAtThisLevel.complete();\n  }\n\n  /**\n   * Creates the overlay into which the dialog will be loaded.\n   * @param config The dialog configuration.\n   * @returns A promise resolving to the OverlayRef for the created overlay.\n   */\n  private _createOverlay(config: MatDialogConfig): OverlayRef {\n    const overlayConfig = this._getOverlayConfig(config);\n    return this._overlay.create(overlayConfig);\n  }\n\n  /**\n   * Creates an overlay config from a dialog config.\n   * @param dialogConfig The dialog configuration.\n   * @returns The overlay configuration.\n   */\n  private _getOverlayConfig(dialogConfig: MatDialogConfig): OverlayConfig {\n    const state = new OverlayConfig({\n      positionStrategy: this._overlay.position().global(),\n      scrollStrategy: dialogConfig.scrollStrategy || this._scrollStrategy(),\n      panelClass: dialogConfig.panelClass,\n      hasBackdrop: dialogConfig.hasBackdrop,\n      direction: dialogConfig.direction,\n      minWidth: dialogConfig.minWidth,\n      minHeight: dialogConfig.minHeight,\n      maxWidth: dialogConfig.maxWidth,\n      maxHeight: dialogConfig.maxHeight,\n      disposeOnNavigation: dialogConfig.closeOnNavigation\n    });\n\n    if (dialogConfig.backdropClass) {\n      state.backdropClass = dialogConfig.backdropClass;\n    }\n\n    return state;\n  }\n\n  /**\n   * Attaches an MatDialogContainer 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 _attachDialogContainer(overlay: OverlayRef, config: MatDialogConfig): MatDialogContainer {\n    const userInjector = config && config.viewContainerRef && config.viewContainerRef.injector;\n    const injector = new PortalInjector(userInjector || this._injector, new WeakMap([\n      [MatDialogConfig, config]\n    ]));\n    const containerPortal = new ComponentPortal(MatDialogContainer,\n        config.viewContainerRef, injector, config.componentFactoryResolver);\n    const containerRef = overlay.attach<MatDialogContainer>(containerPortal);\n\n    return containerRef.instance;\n  }\n\n  /**\n   * Attaches the user-provided component to the already-created MatDialogContainer.\n   * @param componentOrTemplateRef The type of component being loaded into the dialog,\n   *     or a TemplateRef to instantiate as the content.\n   * @param dialogContainer Reference to the wrapping MatDialogContainer.\n   * @param overlayRef Reference to the overlay in which the dialog resides.\n   * @param config The dialog configuration.\n   * @returns A promise resolving to the MatDialogRef that should be returned to the user.\n   */\n  private _attachDialogContent<T, R>(\n      componentOrTemplateRef: ComponentType<T> | TemplateRef<T>,\n      dialogContainer: MatDialogContainer,\n      overlayRef: OverlayRef,\n      config: MatDialogConfig): MatDialogRef<T, R> {\n\n    // Create a reference to the dialog we're creating in order to give the user a handle\n    // to modify and close it.\n    const dialogRef =\n        new MatDialogRef<T, R>(overlayRef, dialogContainer, config.id);\n\n    // When the dialog backdrop is clicked, we want to close it.\n    if (config.hasBackdrop) {\n      overlayRef.backdropClick().subscribe(() => {\n        if (!dialogRef.disableClose) {\n          dialogRef.close();\n        }\n      });\n    }\n\n    if (componentOrTemplateRef instanceof TemplateRef) {\n      dialogContainer.attachTemplatePortal(\n        new TemplatePortal<T>(componentOrTemplateRef, null!,\n          <any>{$implicit: config.data, dialogRef}));\n    } else {\n      const injector = this._createInjector<T>(config, dialogRef, dialogContainer);\n      const contentRef = dialogContainer.attachComponentPortal<T>(\n          new ComponentPortal(componentOrTemplateRef, config.viewContainerRef, injector));\n      dialogRef.componentInstance = contentRef.instance;\n    }\n\n    dialogRef\n      .updateSize(config.width, config.height)\n      .updatePosition(config.position);\n\n    return dialogRef;\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.\n   * @param container Dialog container element that wraps all of the contents.\n   * @returns The custom injector that can be used inside the dialog.\n   */\n  private _createInjector<T>(\n      config: MatDialogConfig,\n      dialogRef: MatDialogRef<T>,\n      dialogContainer: MatDialogContainer): PortalInjector {\n\n    const userInjector = config && config.viewContainerRef && config.viewContainerRef.injector;\n\n    // The MatDialogContainer is injected in the portal as the MatDialogContainer and the dialog's\n    // content are created out of the same ViewContainerRef and as such, are siblings for injector\n    // purposes. To allow the hierarchy that is expected, the MatDialogContainer is explicitly\n    // added to the injection tokens.\n    const injectionTokens = new WeakMap<any, any>([\n      [MatDialogContainer, dialogContainer],\n      [MAT_DIALOG_DATA, config.data],\n      [MatDialogRef, dialogRef]\n    ]);\n\n    if (config.direction &&\n        (!userInjector || !userInjector.get<Directionality | null>(Directionality, null))) {\n      injectionTokens.set(Directionality, {\n        value: config.direction,\n        change: observableOf()\n      });\n    }\n\n    return new PortalInjector(userInjector || this._injector, injectionTokens);\n  }\n\n  /**\n   * Removes a dialog from the array of open dialogs.\n   * @param dialogRef Dialog to be removed.\n   */\n  private _removeOpenDialog(dialogRef: MatDialogRef<any>) {\n    const index = this.openDialogs.indexOf(dialogRef);\n\n    if (index > -1) {\n      this.openDialogs.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        this._afterAllClosed.next();\n      }\n    }\n  }\n\n  /**\n   * Hides all of the content that isn't an overlay from assistive technology.\n   */\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        let sibling = siblings[i];\n\n        if (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  /** Closes all of the dialogs in an array. */\n  private _closeDialogs(dialogs: MatDialogRef<any>[]) {\n    let i = dialogs.length;\n\n    while (i--) {\n      // The `_openDialogs` property isn't updated after close until the rxjs subscription\n      // runs on the next microtask, in addition to modifying the array as we're going\n      // through it. We loop through all of them and call close without assuming that\n      // they'll be removed from the list instantaneously.\n      dialogs[i].close();\n    }\n  }\n\n}\n\n/**\n * Applies default options to the dialog config.\n * @param config Config to be modified.\n * @param defaultOptions Default options provided.\n * @returns The new configuration object.\n */\nfunction _applyConfigDefaults(\n    config?: MatDialogConfig, defaultOptions?: MatDialogConfig): MatDialogConfig {\n  return {...defaultOptions, ...config};\n}\n"]}