default-src_app_custom-elements_code_code_component_ts-src_app_custom-elements_code_code_module_ts.17b1801e510bb50a.js.map

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{ DOCUMENT } from '@angular/common';\nimport * as i0 from '@angular/core';\nimport { Injectable, Inject, InjectionToken, EventEmitter, Directive, Optional, Input, Output, NgModule } from '@angular/core';\n\n/**\n * @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/**\n * A pending copy-to-clipboard operation.\n *\n * The implementation of copying text to the clipboard modifies the DOM and\n * forces a relayout. This relayout can take too long if the string is large,\n * causing the execCommand('copy') to happen too long after the user clicked.\n * This results in the browser refusing to copy. This object lets the\n * relayout happen in a separate tick from copying by providing a copy function\n * that can be called later.\n *\n * Destroy must be called when no longer in use, regardless of whether `copy` is\n * called.\n */\nclass PendingCopy {\n    constructor(text, _document) {\n        this._document = _document;\n        const textarea = (this._textarea = this._document.createElement('textarea'));\n        const styles = textarea.style;\n        // Hide the element for display and accessibility. Set a fixed position so the page layout\n        // isn't affected. We use `fixed` with `top: 0`, because focus is moved into the textarea\n        // for a split second and if it's off-screen, some browsers will attempt to scroll it into view.\n        styles.position = 'fixed';\n        styles.top = styles.opacity = '0';\n        styles.left = '-999em';\n        textarea.setAttribute('aria-hidden', 'true');\n        textarea.value = text;\n        this._document.body.appendChild(textarea);\n    }\n    /** Finishes copying the text. */\n    copy() {\n        const textarea = this._textarea;\n        let successful = false;\n        try {\n            // Older browsers could throw if copy is not supported.\n            if (textarea) {\n                const currentFocus = this._document.activeElement;\n                textarea.select();\n                textarea.setSelectionRange(0, textarea.value.length);\n                successful = this._document.execCommand('copy');\n                if (currentFocus) {\n                    currentFocus.focus();\n                }\n            }\n        }\n        catch (_a) {\n            // Discard error.\n            // Initial setting of {@code successful} will represent failure here.\n        }\n        return successful;\n    }\n    /** Cleans up DOM changes used to perform the copy operation. */\n    destroy() {\n        const textarea = this._textarea;\n        if (textarea) {\n            textarea.remove();\n            this._textarea = undefined;\n        }\n    }\n}\n\n/**\n * @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/**\n * A service for copying text to the clipboard.\n */\nclass Clipboard {\n    constructor(document) {\n        this._document = document;\n    }\n    /**\n     * Copies the provided text into the user's clipboard.\n     *\n     * @param text The string to copy.\n     * @returns Whether the operation was successful.\n     */\n    copy(text) {\n        const pendingCopy = this.beginCopy(text);\n        const successful = pendingCopy.copy();\n        pendingCopy.destroy();\n        return successful;\n    }\n    /**\n     * Prepares a string to be copied later. This is useful for large strings\n     * which take too long to successfully render and be copied in the same tick.\n     *\n     * The caller must call `destroy` on the returned `PendingCopy`.\n     *\n     * @param text The string to copy.\n     * @returns the pending copy operation.\n     */\n    beginCopy(text) {\n        return new PendingCopy(text, this._document);\n    }\n}\nClipboard.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: Clipboard, deps: [{ token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });\nClipboard.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: Clipboard, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: Clipboard, decorators: [{\n            type: Injectable,\n            args: [{ providedIn: 'root' }]\n        }], ctorParameters: function () {\n        return [{ type: undefined, decorators: [{\n                        type: Inject,\n                        args: [DOCUMENT]\n                    }] }];\n    } });\n\n/**\n * @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/** Injection token that can be used to provide the default options to `CdkCopyToClipboard`. */\nconst CDK_COPY_TO_CLIPBOARD_CONFIG = new InjectionToken('CDK_COPY_TO_CLIPBOARD_CONFIG');\n/**\n * Provides behavior for a button that when clicked copies content into user's\n * clipboard.\n */\nclass CdkCopyToClipboard {\n    constructor(_clipboard, _ngZone, config) {\n        this._clipboard = _clipboard;\n        this._ngZone = _ngZone;\n        /** Content to be copied. */\n        this.text = '';\n        /**\n         * How many times to attempt to copy the text. This may be necessary for longer text, because\n         * the browser needs time to fill an intermediate textarea element and copy the content.\n         */\n        this.attempts = 1;\n        /**\n         * Emits when some text is copied to the clipboard. The\n         * emitted value indicates whether copying was successful.\n         */\n        this.copied = new EventEmitter();\n        /** Copies that are currently being attempted. */\n        this._pending = new Set();\n        if (config && config.attempts != null) {\n            this.attempts = config.attempts;\n        }\n    }\n    /** Copies the current text to the clipboard. */\n    copy(attempts = this.attempts) {\n        if (attempts > 1) {\n            let remainingAttempts = attempts;\n            const pending = this._clipboard.beginCopy(this.text);\n            this._pending.add(pending);\n            const attempt = () => {\n                const successful = pending.copy();\n                if (!successful && --remainingAttempts && !this._destroyed) {\n                    // We use 1 for the timeout since it's more predictable when flushing in unit tests.\n                    this._currentTimeout = this._ngZone.runOutsideAngular(() => setTimeout(attempt, 1));\n                }\n                else {\n                    this._currentTimeout = null;\n                    this._pending.delete(pending);\n                    pending.destroy();\n                    this.copied.emit(successful);\n                }\n            };\n            attempt();\n        }\n        else {\n            this.copied.emit(this._clipboard.copy(this.text));\n        }\n    }\n    ngOnDestroy() {\n        if (this._currentTimeout) {\n            clearTimeout(this._currentTimeout);\n        }\n        this._pending.forEach(copy => copy.destroy());\n        this._pending.clear();\n        this._destroyed = true;\n    }\n}\nCdkCopyToClipboard.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: CdkCopyToClipboard, deps: [{ token: Clipboard }, { token: i0.NgZone }, { token: CDK_COPY_TO_CLIPBOARD_CONFIG, optional: true }], target: i0.ɵɵFactoryTarget.Directive });\nCdkCopyToClipboard.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.1\", type: CdkCopyToClipboard, selector: \"[cdkCopyToClipboard]\", inputs: { text: [\"cdkCopyToClipboard\", \"text\"], attempts: [\"cdkCopyToClipboardAttempts\", \"attempts\"] }, outputs: { copied: \"cdkCopyToClipboardCopied\" }, host: { listeners: { \"click\": \"copy()\" } }, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: CdkCopyToClipboard, decorators: [{\n            type: Directive,\n            args: [{\n                    selector: '[cdkCopyToClipboard]',\n                    host: {\n                        '(click)': 'copy()',\n                    },\n                }]\n        }], ctorParameters: function () {\n        return [{ type: Clipboard }, { type: i0.NgZone }, { type: undefined, decorators: [{\n                        type: Optional\n                    }, {\n                        type: Inject,\n                        args: [CDK_COPY_TO_CLIPBOARD_CONFIG]\n                    }] }];\n    }, propDecorators: { text: [{\n                type: Input,\n                args: ['cdkCopyToClipboard']\n            }], attempts: [{\n                type: Input,\n                args: ['cdkCopyToClipboardAttempts']\n            }], copied: [{\n                type: Output,\n                args: ['cdkCopyToClipboardCopied']\n            }] } });\n\n/**\n * @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 */\nclass ClipboardModule {\n}\nClipboardModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: ClipboardModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nClipboardModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: ClipboardModule, declarations: [CdkCopyToClipboard], exports: [CdkCopyToClipboard] });\nClipboardModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: ClipboardModule });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: ClipboardModule, decorators: [{\n            type: NgModule,\n            args: [{\n                    declarations: [CdkCopyToClipboard],\n                    exports: [CdkCopyToClipboard],\n                }]\n        }] });\n\n/**\n * @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\n/**\n * @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\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { CDK_COPY_TO_CLIPBOARD_CONFIG, CdkCopyToClipboard, Clipboard, ClipboardModule, PendingCopy };\n","import { Component, ElementRef, EventEmitter, Input, OnChanges, Output, ViewChild } from '@angular/core';\nimport { Clipboard } from '@angular/cdk/clipboard';\nimport { Logger } from 'app/shared/logger.service';\nimport { PrettyPrinter } from './pretty-printer.service';\nimport { MatSnackBar } from '@angular/material/snack-bar';\nimport { Observable, of } from 'rxjs';\nimport { tap } from 'rxjs/operators';\nimport { unwrapHtmlForSink } from 'safevalues';\nimport { htmlFromStringKnownToSatisfyTypeContract } from 'safevalues/unsafe/reviewed';\nimport { fromOuterHTML } from 'app/shared/security';\n\n/**\n * Formatted Code Block\n *\n * Pretty renders a code block, used in the docs and API reference by the code-example and\n * code-tabs embedded components.\n * It includes a \"copy\" button that will send the content to the clipboard when clicked\n *\n * Example usage:\n *\n * ```\n * <aio-code\n *   [language]=\"ts\"\n *   [linenums]=\"true\"\n *   [path]=\"router/src/app/app.module.ts\"\n *   [region]=\"animations-module\">\n * </aio-code>\n * ```\n *\n *\n * Renders code provided through the `updateCode` method.\n */\n@Component({\n  selector: 'aio-code',\n  template: `\n    <pre class=\"prettyprint lang-{{language}}\">\n      <button *ngIf=\"!hideCopy\" class=\"material-icons copy-button no-print\"\n        title=\"Copy code snippet\"\n        [attr.aria-label]=\"ariaLabel\"\n        (click)=\"doCopy()\">\n        <span aria-hidden=\"true\">content_copy</span>\n      </button>\n      <code class=\"animated fadeIn\" #codeContainer></code>\n    </pre>\n    `\n})\nexport class CodeComponent implements OnChanges {\n  ariaLabel = '';\n\n  /** The code to be copied when clicking the copy button, this should not be HTML encoded */\n  private codeText: string;\n\n  /** Code that should be formatted with current inputs and displayed in the view. */\n  set code(code: TrustedHTML) {\n    this._code = code;\n\n    if (!this._code.toString().trim()) {\n      this.showMissingCodeMessage();\n    } else {\n      this.formatDisplayedCode();\n    }\n  }\n  get code(): TrustedHTML {\n    return this._code;\n  }\n  _code: TrustedHTML;\n\n  /** Whether the copy button should be shown. */\n  @Input() hideCopy: boolean;\n\n  /** Language to render the code (e.g. javascript, dart, typescript). */\n  @Input() language: string | undefined;\n\n  /**\n   * Whether to display line numbers:\n   *  - If false: hide\n   *  - If true: show\n   *  - If number: show but start at that number\n   */\n  @Input() linenums: boolean | number | string | undefined;\n\n  /** Path to the source of the code. */\n  @Input() path: string;\n\n  /** Region of the source of the code being displayed. */\n  @Input() region: string;\n\n  /** Optional header to be displayed above the code. */\n  @Input()\n  set header(header: string | undefined) {\n    this._header = header;\n    this.ariaLabel = this.header ? `Copy code snippet from ${this.header}` : '';\n  }\n  get header(): string|undefined { return this._header; }\n  private _header: string | undefined;\n\n  @Output() codeFormatted = new EventEmitter<void>();\n\n  /** The element in the template that will display the formatted code. */\n  @ViewChild('codeContainer', { static: true }) codeContainer: ElementRef;\n\n  constructor(\n    private snackbar: MatSnackBar,\n    private pretty: PrettyPrinter,\n    private clipboard: Clipboard,\n    private logger: Logger) {}\n\n  ngOnChanges() {\n    // If some inputs have changed and there is code displayed, update the view with the latest\n    // formatted code.\n    if (this.code) {\n      this.formatDisplayedCode();\n    }\n  }\n\n  private formatDisplayedCode() {\n    const linenums = this.getLinenums();\n    const leftAlignedCode = leftAlign(this.code);\n    this.setCodeHtml(leftAlignedCode); // start with unformatted code\n    this.codeText = this.getCodeText(); // store the unformatted code as text (for copying)\n\n    const skipPrettify = of(undefined);\n    const prettifyCode = this.pretty\n        .formatCode(leftAlignedCode, this.language, linenums)\n        .pipe(tap(formattedCode => this.setCodeHtml(formattedCode)));\n\n    if (linenums !== false && this.language === 'none') {\n      this.logger.warn(\"Using 'linenums' with 'language: none' is currently not supported.\");\n    }\n\n    ((this.language === 'none' ? skipPrettify : prettifyCode) as Observable<unknown>)\n        .subscribe(() => this.codeFormatted.emit(), () => { /* ignore failure to format */ });\n  }\n\n  /** Sets the message showing that the code could not be found. */\n  private showMissingCodeMessage() {\n    const src = this.path ? this.path + (this.region ? '#' + this.region : '') : '';\n    const msg = `The code sample is missing${src ? ` for\\n${src}` : '.'}`;\n    const el = document.createElement('p');\n    el.className = 'code-missing';\n    el.textContent = msg;\n    this.setCodeHtml(fromOuterHTML(el));\n  }\n\n  /** Sets the innerHTML of the code container to the provided code string. */\n  private setCodeHtml(formattedCode: TrustedHTML) {\n    // **Security:** Code example content is provided by docs authors and as such its considered to\n    // be safe for innerHTML purposes.\n    this.codeContainer.nativeElement.innerHTML = unwrapHtmlForSink(formattedCode);\n  }\n\n  /** Gets the textContent of the displayed code element. */\n  private getCodeText() {\n    // `prettify` may remove newlines, e.g. when `linenums` are on. Retrieve the content of the\n    // container as text, before prettifying it.\n    // We take the textContent because we don't want it to be HTML encoded.\n    return this.codeContainer.nativeElement.textContent;\n  }\n\n  /** Copies the code snippet to the user's clipboard. */\n  doCopy() {\n    const code = this.codeText;\n    const successfullyCopied = this.clipboard.copy(code);\n\n    if (successfullyCopied) {\n      this.logger.log('Copied code to clipboard:', code);\n      this.snackbar.open('Code Copied', '', { duration: 800 });\n    } else {\n      this.logger.error(new Error(`ERROR copying code to clipboard: \"${code}\"`));\n      this.snackbar.open('Copy failed. Please try again!', '', { duration: 800 });\n    }\n  }\n\n  /** Gets the calculated value of linenums (boolean/number). */\n  getLinenums() {\n    const linenums =\n      typeof this.linenums === 'boolean' ? this.linenums :\n      this.linenums === 'true' ? true :\n      this.linenums === 'false' ? false :\n      typeof this.linenums === 'string' ? parseInt(this.linenums, 10) :\n      this.linenums;\n\n    return (linenums != null) && !isNaN(linenums as number) && linenums;\n  }\n}\n\nfunction leftAlign(text: TrustedHTML): TrustedHTML {\n  let indent = Number.MAX_VALUE;\n\n  const lines = text.toString().split('\\n');\n  lines.forEach(line => {\n    const lineIndent = line.search(/\\S/);\n    if (lineIndent !== -1) {\n      indent = Math.min(lineIndent, indent);\n    }\n  });\n\n  return htmlFromStringKnownToSatisfyTypeContract(\n      lines.map(line => line.substr(indent)).join('\\n').trim(),\n      'safe manipulation of existing trusted HTML');\n}\n","import { NgModule } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { CodeComponent } from './code.component';\nimport { MatSnackBarModule } from '@angular/material/snack-bar';\nimport { PrettyPrinter } from './pretty-printer.service';\n\n@NgModule({\n  imports: [ CommonModule, MatSnackBarModule ],\n  declarations: [ CodeComponent ],\n  exports: [ CodeComponent ],\n  providers: [ PrettyPrinter ]\n})\nexport class CodeModule { }\n","import { Injectable } from '@angular/core';\nimport { htmlFromStringKnownToSatisfyTypeContract } from 'safevalues/unsafe/reviewed';\n\nimport { from, Observable } from 'rxjs';\nimport { first, map, share } from 'rxjs/operators';\n\nimport { Logger } from 'app/shared/logger.service';\n\ntype PrettyPrintOne = (code: TrustedHTML, language?: string, linenums?: number|boolean) => string;\n\n/**\n * Wrapper around the prettify.js library\n */\n@Injectable()\nexport class PrettyPrinter {\n\n  private prettyPrintOne: Observable<PrettyPrintOne>;\n\n  constructor(private logger: Logger) {\n    this.prettyPrintOne = from(this.getPrettyPrintOne()).pipe(share());\n  }\n\n  private getPrettyPrintOne(): Promise<PrettyPrintOne> {\n    const ppo = (window as any).prettyPrintOne;\n    return ppo ? Promise.resolve(ppo) :\n      // `prettyPrintOne` is not on `window`, which means `prettify.js` has not been loaded yet.\n      // Import it; ad a side-effect it will add `prettyPrintOne` on `window`.\n      import('assets/js/prettify.js' as any)\n        .then(\n          () => (window as any).prettyPrintOne,\n          err => {\n            const msg = `Cannot get prettify.js from server: ${err.message}`;\n            this.logger.error(new Error(msg));\n            // return a pretty print fn that always fails.\n            return () => { throw new Error(msg); };\n          });\n  }\n\n  /**\n   * Format code snippet as HTML.\n   *\n   * @param code - the code snippet to format; should already be HTML encoded\n   * @param [language] - The language of the code to render (could be javascript, html, typescript, etc)\n   * @param [linenums] - Whether to display line numbers:\n   *  - false: don't display\n   *  - true: do display\n   *  - number: do display but start at the given number\n   * @returns Observable<string> - Observable of formatted code\n   */\n  formatCode(code: TrustedHTML, language?: string, linenums?: number|boolean) {\n    return this.prettyPrintOne.pipe(\n      map(ppo => {\n        try {\n          return htmlFromStringKnownToSatisfyTypeContract(\n              ppo(code, language, linenums), 'prettify.js modifies already trusted HTML inline');\n        } catch (err) {\n          const msg = `Could not format code that begins '${code.toString().substr(0, 50)}...'.`;\n          console.error(msg, err);\n          throw new Error(msg);\n        }\n      }),\n      first(),  // complete immediately\n    );\n  }\n}\n","import * as i0 from '@angular/core';\nimport { ElementRef, Directive, EventEmitter, Inject, Output, NgModule } from '@angular/core';\nimport { DOCUMENT } from '@angular/common';\n\n/**\n * @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/**\n * Throws an exception when attempting to attach a null portal to a host.\n * @docs-private\n */\nfunction throwNullPortalError() {\n    throw Error('Must provide a portal to attach');\n}\n/**\n * Throws an exception when attempting to attach a portal to a host that is already attached.\n * @docs-private\n */\nfunction throwPortalAlreadyAttachedError() {\n    throw Error('Host already has a portal attached');\n}\n/**\n * Throws an exception when attempting to attach a portal to an already-disposed host.\n * @docs-private\n */\nfunction throwPortalOutletAlreadyDisposedError() {\n    throw Error('This PortalOutlet has already been disposed');\n}\n/**\n * Throws an exception when attempting to attach an unknown portal type.\n * @docs-private\n */\nfunction throwUnknownPortalTypeError() {\n    throw Error('Attempting to attach an unknown Portal type. BasePortalOutlet accepts either ' +\n        'a ComponentPortal or a TemplatePortal.');\n}\n/**\n * Throws an exception when attempting to attach a portal to a null host.\n * @docs-private\n */\nfunction throwNullPortalOutletError() {\n    throw Error('Attempting to attach a portal to a null PortalOutlet');\n}\n/**\n * Throws an exception when attempting to detach a portal that is not attached.\n * @docs-private\n */\nfunction throwNoPortalAttachedError() {\n    throw Error('Attempting to detach a portal that is not attached to a host');\n}\n\n/**\n * @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/**\n * A `Portal` is something that you want to render somewhere else.\n * It can be attach to / detached from a `PortalOutlet`.\n */\nclass Portal {\n    /** Attach this portal to a host. */\n    attach(host) {\n        if (typeof ngDevMode === 'undefined' || ngDevMode) {\n            if (host == null) {\n                throwNullPortalOutletError();\n            }\n            if (host.hasAttached()) {\n                throwPortalAlreadyAttachedError();\n            }\n        }\n        this._attachedHost = host;\n        return host.attach(this);\n    }\n    /** Detach this portal from its host */\n    detach() {\n        let host = this._attachedHost;\n        if (host != null) {\n            this._attachedHost = null;\n            host.detach();\n        }\n        else if (typeof ngDevMode === 'undefined' || ngDevMode) {\n            throwNoPortalAttachedError();\n        }\n    }\n    /** Whether this portal is attached to a host. */\n    get isAttached() {\n        return this._attachedHost != null;\n    }\n    /**\n     * Sets the PortalOutlet reference without performing `attach()`. This is used directly by\n     * the PortalOutlet when it is performing an `attach()` or `detach()`.\n     */\n    setAttachedHost(host) {\n        this._attachedHost = host;\n    }\n}\n/**\n * A `ComponentPortal` is a portal that instantiates some Component upon attachment.\n */\nclass ComponentPortal extends Portal {\n    constructor(component, viewContainerRef, injector, componentFactoryResolver) {\n        super();\n        this.component = component;\n        this.viewContainerRef = viewContainerRef;\n        this.injector = injector;\n        this.componentFactoryResolver = componentFactoryResolver;\n    }\n}\n/**\n * A `TemplatePortal` is a portal that represents some embedded template (TemplateRef).\n */\nclass TemplatePortal extends Portal {\n    constructor(template, viewContainerRef, context) {\n        super();\n        this.templateRef = template;\n        this.viewContainerRef = viewContainerRef;\n        this.context = context;\n    }\n    get origin() {\n        return this.templateRef.elementRef;\n    }\n    /**\n     * Attach the portal to the provided `PortalOutlet`.\n     * When a context is provided it will override the `context` property of the `TemplatePortal`\n     * instance.\n     */\n    attach(host, context = this.context) {\n        this.context = context;\n        return super.attach(host);\n    }\n    detach() {\n        this.context = undefined;\n        return super.detach();\n    }\n}\n/**\n * A `DomPortal` is a portal whose DOM element will be taken from its current position\n * in the DOM and moved into a portal outlet, when it is attached. On detach, the content\n * will be restored to its original position.\n */\nclass DomPortal extends Portal {\n    constructor(element) {\n        super();\n        this.element = element instanceof ElementRef ? element.nativeElement : element;\n    }\n}\n/**\n * Partial implementation of PortalOutlet that handles attaching\n * ComponentPortal and TemplatePortal.\n */\nclass BasePortalOutlet {\n    constructor() {\n        /** Whether this host has already been permanently disposed. */\n        this._isDisposed = false;\n        // @breaking-change 10.0.0 `attachDomPortal` to become a required abstract method.\n        this.attachDomPortal = null;\n    }\n    /** Whether this host has an attached portal. */\n    hasAttached() {\n        return !!this._attachedPortal;\n    }\n    /** Attaches a portal. */\n    attach(portal) {\n        if (typeof ngDevMode === 'undefined' || ngDevMode) {\n            if (!portal) {\n                throwNullPortalError();\n            }\n            if (this.hasAttached()) {\n                throwPortalAlreadyAttachedError();\n            }\n            if (this._isDisposed) {\n                throwPortalOutletAlreadyDisposedError();\n            }\n        }\n        if (portal instanceof ComponentPortal) {\n            this._attachedPortal = portal;\n            return this.attachComponentPortal(portal);\n        }\n        else if (portal instanceof TemplatePortal) {\n            this._attachedPortal = portal;\n            return this.attachTemplatePortal(portal);\n            // @breaking-change 10.0.0 remove null check for `this.attachDomPortal`.\n        }\n        else if (this.attachDomPortal && portal instanceof DomPortal) {\n            this._attachedPortal = portal;\n            return this.attachDomPortal(portal);\n        }\n        if (typeof ngDevMode === 'undefined' || ngDevMode) {\n            throwUnknownPortalTypeError();\n        }\n    }\n    /** Detaches a previously attached portal. */\n    detach() {\n        if (this._attachedPortal) {\n            this._attachedPortal.setAttachedHost(null);\n            this._attachedPortal = null;\n        }\n        this._invokeDisposeFn();\n    }\n    /** Permanently dispose of this portal host. */\n    dispose() {\n        if (this.hasAttached()) {\n            this.detach();\n        }\n        this._invokeDisposeFn();\n        this._isDisposed = true;\n    }\n    /** @docs-private */\n    setDisposeFn(fn) {\n        this._disposeFn = fn;\n    }\n    _invokeDisposeFn() {\n        if (this._disposeFn) {\n            this._disposeFn();\n            this._disposeFn = null;\n        }\n    }\n}\n/**\n * @deprecated Use `BasePortalOutlet` instead.\n * @breaking-change 9.0.0\n */\nclass BasePortalHost extends BasePortalOutlet {\n}\n\n/**\n * @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/**\n * A PortalOutlet for attaching portals to an arbitrary DOM element outside of the Angular\n * application context.\n */\nclass DomPortalOutlet extends BasePortalOutlet {\n    constructor(\n    /** Element into which the content is projected. */\n    outletElement, _componentFactoryResolver, _appRef, _defaultInjector, \n    /**\n     * @deprecated `_document` Parameter to be made required.\n     * @breaking-change 10.0.0\n     */\n    _document) {\n        super();\n        this.outletElement = outletElement;\n        this._componentFactoryResolver = _componentFactoryResolver;\n        this._appRef = _appRef;\n        this._defaultInjector = _defaultInjector;\n        /**\n         * Attaches a DOM portal by transferring its content into the outlet.\n         * @param portal Portal to be attached.\n         * @deprecated To be turned into a method.\n         * @breaking-change 10.0.0\n         */\n        this.attachDomPortal = (portal) => {\n            // @breaking-change 10.0.0 Remove check and error once the\n            // `_document` constructor parameter is required.\n            if (!this._document && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n                throw Error('Cannot attach DOM portal without _document constructor parameter');\n            }\n            const element = portal.element;\n            if (!element.parentNode && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n                throw Error('DOM portal content must be attached to a parent node.');\n            }\n            // Anchor used to save the element's previous position so\n            // that we can restore it when the portal is detached.\n            const anchorNode = this._document.createComment('dom-portal');\n            element.parentNode.insertBefore(anchorNode, element);\n            this.outletElement.appendChild(element);\n            this._attachedPortal = portal;\n            super.setDisposeFn(() => {\n                // We can't use `replaceWith` here because IE doesn't support it.\n                if (anchorNode.parentNode) {\n                    anchorNode.parentNode.replaceChild(element, anchorNode);\n                }\n            });\n        };\n        this._document = _document;\n    }\n    /**\n     * Attach the given ComponentPortal to DOM element using the ComponentFactoryResolver.\n     * @param portal Portal to be attached\n     * @returns Reference to the created component.\n     */\n    attachComponentPortal(portal) {\n        const resolver = portal.componentFactoryResolver || this._componentFactoryResolver;\n        const componentFactory = resolver.resolveComponentFactory(portal.component);\n        let componentRef;\n        // If the portal specifies a ViewContainerRef, we will use that as the attachment point\n        // for the component (in terms of Angular's component tree, not rendering).\n        // When the ViewContainerRef is missing, we use the factory to create the component directly\n        // and then manually attach the view to the application.\n        if (portal.viewContainerRef) {\n            componentRef = portal.viewContainerRef.createComponent(componentFactory, portal.viewContainerRef.length, portal.injector || portal.viewContainerRef.injector);\n            this.setDisposeFn(() => componentRef.destroy());\n        }\n        else {\n            componentRef = componentFactory.create(portal.injector || this._defaultInjector);\n            this._appRef.attachView(componentRef.hostView);\n            this.setDisposeFn(() => {\n                this._appRef.detachView(componentRef.hostView);\n                componentRef.destroy();\n            });\n        }\n        // At this point the component has been instantiated, so we move it to the location in the DOM\n        // where we want it to be rendered.\n        this.outletElement.appendChild(this._getComponentRootNode(componentRef));\n        this._attachedPortal = portal;\n        return componentRef;\n    }\n    /**\n     * Attaches a template portal to the DOM as an embedded view.\n     * @param portal Portal to be attached.\n     * @returns Reference to the created embedded view.\n     */\n    attachTemplatePortal(portal) {\n        let viewContainer = portal.viewContainerRef;\n        let viewRef = viewContainer.createEmbeddedView(portal.templateRef, portal.context);\n        // The method `createEmbeddedView` will add the view as a child of the viewContainer.\n        // But for the DomPortalOutlet the view can be added everywhere in the DOM\n        // (e.g Overlay Container) To move the view to the specified host element. We just\n        // re-append the existing root nodes.\n        viewRef.rootNodes.forEach(rootNode => this.outletElement.appendChild(rootNode));\n        // Note that we want to detect changes after the nodes have been moved so that\n        // any directives inside the portal that are looking at the DOM inside a lifecycle\n        // hook won't be invoked too early.\n        viewRef.detectChanges();\n        this.setDisposeFn(() => {\n            let index = viewContainer.indexOf(viewRef);\n            if (index !== -1) {\n                viewContainer.remove(index);\n            }\n        });\n        this._attachedPortal = portal;\n        // TODO(jelbourn): Return locals from view.\n        return viewRef;\n    }\n    /**\n     * Clears out a portal from the DOM.\n     */\n    dispose() {\n        super.dispose();\n        this.outletElement.remove();\n    }\n    /** Gets the root HTMLElement for an instantiated component. */\n    _getComponentRootNode(componentRef) {\n        return componentRef.hostView.rootNodes[0];\n    }\n}\n/**\n * @deprecated Use `DomPortalOutlet` instead.\n * @breaking-change 9.0.0\n */\nclass DomPortalHost extends DomPortalOutlet {\n}\n\n/**\n * @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/**\n * Directive version of a `TemplatePortal`. Because the directive *is* a TemplatePortal,\n * the directive instance itself can be attached to a host, enabling declarative use of portals.\n */\nclass CdkPortal extends TemplatePortal {\n    constructor(templateRef, viewContainerRef) {\n        super(templateRef, viewContainerRef);\n    }\n}\nCdkPortal.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: CdkPortal, deps: [{ token: i0.TemplateRef }, { token: i0.ViewContainerRef }], target: i0.ɵɵFactoryTarget.Directive });\nCdkPortal.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.1\", type: CdkPortal, selector: \"[cdkPortal]\", exportAs: [\"cdkPortal\"], usesInheritance: true, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: CdkPortal, decorators: [{\n            type: Directive,\n            args: [{\n                    selector: '[cdkPortal]',\n                    exportAs: 'cdkPortal',\n                }]\n        }], ctorParameters: function () { return [{ type: i0.TemplateRef }, { type: i0.ViewContainerRef }]; } });\n/**\n * @deprecated Use `CdkPortal` instead.\n * @breaking-change 9.0.0\n */\nclass TemplatePortalDirective extends CdkPortal {\n}\nTemplatePortalDirective.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: TemplatePortalDirective, deps: null, target: i0.ɵɵFactoryTarget.Directive });\nTemplatePortalDirective.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.1\", type: TemplatePortalDirective, selector: \"[cdk-portal], [portal]\", providers: [\n        {\n            provide: CdkPortal,\n            useExisting: TemplatePortalDirective,\n        },\n    ], exportAs: [\"cdkPortal\"], usesInheritance: true, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: TemplatePortalDirective, decorators: [{\n            type: Directive,\n            args: [{\n                    selector: '[cdk-portal], [portal]',\n                    exportAs: 'cdkPortal',\n                    providers: [\n                        {\n                            provide: CdkPortal,\n                            useExisting: TemplatePortalDirective,\n                        },\n                    ],\n                }]\n        }] });\n/**\n * Directive version of a PortalOutlet. Because the directive *is* a PortalOutlet, portals can be\n * directly attached to it, enabling declarative use.\n *\n * Usage:\n * `<ng-template [cdkPortalOutlet]=\"greeting\"></ng-template>`\n */\nclass CdkPortalOutlet extends BasePortalOutlet {\n    constructor(_componentFactoryResolver, _viewContainerRef, \n    /**\n     * @deprecated `_document` parameter to be made required.\n     * @breaking-change 9.0.0\n     */\n    _document) {\n        super();\n        this._componentFactoryResolver = _componentFactoryResolver;\n        this._viewContainerRef = _viewContainerRef;\n        /** Whether the portal component is initialized. */\n        this._isInitialized = false;\n        /** Emits when a portal is attached to the outlet. */\n        this.attached = new EventEmitter();\n        /**\n         * Attaches the given DomPortal to this PortalHost by moving all of the portal content into it.\n         * @param portal Portal to be attached.\n         * @deprecated To be turned into a method.\n         * @breaking-change 10.0.0\n         */\n        this.attachDomPortal = (portal) => {\n            // @breaking-change 9.0.0 Remove check and error once the\n            // `_document` constructor parameter is required.\n            if (!this._document && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n                throw Error('Cannot attach DOM portal without _document constructor parameter');\n            }\n            const element = portal.element;\n            if (!element.parentNode && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n                throw Error('DOM portal content must be attached to a parent node.');\n            }\n            // Anchor used to save the element's previous position so\n            // that we can restore it when the portal is detached.\n            const anchorNode = this._document.createComment('dom-portal');\n            portal.setAttachedHost(this);\n            element.parentNode.insertBefore(anchorNode, element);\n            this._getRootNode().appendChild(element);\n            this._attachedPortal = portal;\n            super.setDisposeFn(() => {\n                if (anchorNode.parentNode) {\n                    anchorNode.parentNode.replaceChild(element, anchorNode);\n                }\n            });\n        };\n        this._document = _document;\n    }\n    /** Portal associated with the Portal outlet. */\n    get portal() {\n        return this._attachedPortal;\n    }\n    set portal(portal) {\n        // Ignore the cases where the `portal` is set to a falsy value before the lifecycle hooks have\n        // run. This handles the cases where the user might do something like `<div cdkPortalOutlet>`\n        // and attach a portal programmatically in the parent component. When Angular does the first CD\n        // round, it will fire the setter with empty string, causing the user's content to be cleared.\n        if (this.hasAttached() && !portal && !this._isInitialized) {\n            return;\n        }\n        if (this.hasAttached()) {\n            super.detach();\n        }\n        if (portal) {\n            super.attach(portal);\n        }\n        this._attachedPortal = portal;\n    }\n    /** Component or view reference that is attached to the portal. */\n    get attachedRef() {\n        return this._attachedRef;\n    }\n    ngOnInit() {\n        this._isInitialized = true;\n    }\n    ngOnDestroy() {\n        super.dispose();\n        this._attachedPortal = null;\n        this._attachedRef = null;\n    }\n    /**\n     * Attach the given ComponentPortal to this PortalOutlet using the ComponentFactoryResolver.\n     *\n     * @param portal Portal to be attached to the portal outlet.\n     * @returns Reference to the created component.\n     */\n    attachComponentPortal(portal) {\n        portal.setAttachedHost(this);\n        // If the portal specifies an origin, use that as the logical location of the component\n        // in the application tree. Otherwise use the location of this PortalOutlet.\n        const viewContainerRef = portal.viewContainerRef != null ? portal.viewContainerRef : this._viewContainerRef;\n        const resolver = portal.componentFactoryResolver || this._componentFactoryResolver;\n        const componentFactory = resolver.resolveComponentFactory(portal.component);\n        const ref = viewContainerRef.createComponent(componentFactory, viewContainerRef.length, portal.injector || viewContainerRef.injector);\n        // If we're using a view container that's different from the injected one (e.g. when the portal\n        // specifies its own) we need to move the component into the outlet, otherwise it'll be rendered\n        // inside of the alternate view container.\n        if (viewContainerRef !== this._viewContainerRef) {\n            this._getRootNode().appendChild(ref.hostView.rootNodes[0]);\n        }\n        super.setDisposeFn(() => ref.destroy());\n        this._attachedPortal = portal;\n        this._attachedRef = ref;\n        this.attached.emit(ref);\n        return ref;\n    }\n    /**\n     * Attach the given TemplatePortal to this PortalHost as an embedded View.\n     * @param portal Portal to be attached.\n     * @returns Reference to the created embedded view.\n     */\n    attachTemplatePortal(portal) {\n        portal.setAttachedHost(this);\n        const viewRef = this._viewContainerRef.createEmbeddedView(portal.templateRef, portal.context);\n        super.setDisposeFn(() => this._viewContainerRef.clear());\n        this._attachedPortal = portal;\n        this._attachedRef = viewRef;\n        this.attached.emit(viewRef);\n        return viewRef;\n    }\n    /** Gets the root node of the portal outlet. */\n    _getRootNode() {\n        const nativeElement = this._viewContainerRef.element.nativeElement;\n        // The directive could be set on a template which will result in a comment\n        // node being the root. Use the comment's parent node if that is the case.\n        return (nativeElement.nodeType === nativeElement.ELEMENT_NODE\n            ? nativeElement\n            : nativeElement.parentNode);\n    }\n}\nCdkPortalOutlet.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: CdkPortalOutlet, deps: [{ token: i0.ComponentFactoryResolver }, { token: i0.ViewContainerRef }, { token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Directive });\nCdkPortalOutlet.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.1\", type: CdkPortalOutlet, selector: \"[cdkPortalOutlet]\", inputs: { portal: [\"cdkPortalOutlet\", \"portal\"] }, outputs: { attached: \"attached\" }, exportAs: [\"cdkPortalOutlet\"], usesInheritance: true, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: CdkPortalOutlet, decorators: [{\n            type: Directive,\n            args: [{\n                    selector: '[cdkPortalOutlet]',\n                    exportAs: 'cdkPortalOutlet',\n                    inputs: ['portal: cdkPortalOutlet'],\n                }]\n        }], ctorParameters: function () {\n        return [{ type: i0.ComponentFactoryResolver }, { type: i0.ViewContainerRef }, { type: undefined, decorators: [{\n                        type: Inject,\n                        args: [DOCUMENT]\n                    }] }];\n    }, propDecorators: { attached: [{\n                type: Output\n            }] } });\n/**\n * @deprecated Use `CdkPortalOutlet` instead.\n * @breaking-change 9.0.0\n */\nclass PortalHostDirective extends CdkPortalOutlet {\n}\nPortalHostDirective.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: PortalHostDirective, deps: null, target: i0.ɵɵFactoryTarget.Directive });\nPortalHostDirective.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.1\", type: PortalHostDirective, selector: \"[cdkPortalHost], [portalHost]\", inputs: { portal: [\"cdkPortalHost\", \"portal\"] }, providers: [\n        {\n            provide: CdkPortalOutlet,\n            useExisting: PortalHostDirective,\n        },\n    ], exportAs: [\"cdkPortalHost\"], usesInheritance: true, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: PortalHostDirective, decorators: [{\n            type: Directive,\n            args: [{\n                    selector: '[cdkPortalHost], [portalHost]',\n                    exportAs: 'cdkPortalHost',\n                    inputs: ['portal: cdkPortalHost'],\n                    providers: [\n                        {\n                            provide: CdkPortalOutlet,\n                            useExisting: PortalHostDirective,\n                        },\n                    ],\n                }]\n        }] });\nclass PortalModule {\n}\nPortalModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: PortalModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nPortalModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: PortalModule, declarations: [CdkPortal, CdkPortalOutlet, TemplatePortalDirective, PortalHostDirective], exports: [CdkPortal, CdkPortalOutlet, TemplatePortalDirective, PortalHostDirective] });\nPortalModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: PortalModule });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: PortalModule, decorators: [{\n            type: NgModule,\n            args: [{\n                    exports: [CdkPortal, CdkPortalOutlet, TemplatePortalDirective, PortalHostDirective],\n                    declarations: [CdkPortal, CdkPortalOutlet, TemplatePortalDirective, PortalHostDirective],\n                }]\n        }] });\n\n/**\n * @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/**\n * Custom injector to be used when providing custom\n * injection tokens to components inside a portal.\n * @docs-private\n * @deprecated Use `Injector.create` instead.\n * @breaking-change 11.0.0\n */\nclass PortalInjector {\n    constructor(_parentInjector, _customTokens) {\n        this._parentInjector = _parentInjector;\n        this._customTokens = _customTokens;\n    }\n    get(token, notFoundValue) {\n        const value = this._customTokens.get(token);\n        if (typeof value !== 'undefined') {\n            return value;\n        }\n        return this._parentInjector.get(token, notFoundValue);\n    }\n}\n\n/**\n * @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\n/**\n * @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\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { BasePortalHost, BasePortalOutlet, CdkPortal, CdkPortalOutlet, ComponentPortal, DomPortal, DomPortalHost, DomPortalOutlet, Portal, PortalHostDirective, PortalInjector, PortalModule, TemplatePortal, TemplatePortalDirective };\n","import * as i1 from '@angular/cdk/scrolling';\nimport { ScrollingModule } from '@angular/cdk/scrolling';\nexport { CdkScrollable, ScrollDispatcher, ViewportRuler } from '@angular/cdk/scrolling';\nimport * as i6 from '@angular/common';\nimport { DOCUMENT } from '@angular/common';\nimport * as i0 from '@angular/core';\nimport { Injectable, Inject, ElementRef, ApplicationRef, InjectionToken, Directive, EventEmitter, Optional, Input, Output, NgModule } from '@angular/core';\nimport { coerceCssPixelValue, coerceArray, coerceBooleanProperty } from '@angular/cdk/coercion';\nimport * as i1$1 from '@angular/cdk/platform';\nimport { supportsScrollBehavior, _isTestEnvironment, _getEventTarget } from '@angular/cdk/platform';\nimport * as i5 from '@angular/cdk/bidi';\nimport { BidiModule } from '@angular/cdk/bidi';\nimport { DomPortalOutlet, TemplatePortal, PortalModule } from '@angular/cdk/portal';\nimport { Subject, Subscription, merge } from 'rxjs';\nimport { take, takeUntil, takeWhile } from 'rxjs/operators';\nimport { ESCAPE, hasModifierKey } from '@angular/cdk/keycodes';\n\n/**\n * @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 */\nconst scrollBehaviorSupported = supportsScrollBehavior();\n/**\n * Strategy that will prevent the user from scrolling while the overlay is visible.\n */\nclass BlockScrollStrategy {\n    constructor(_viewportRuler, document) {\n        this._viewportRuler = _viewportRuler;\n        this._previousHTMLStyles = { top: '', left: '' };\n        this._isEnabled = false;\n        this._document = document;\n    }\n    /** Attaches this scroll strategy to an overlay. */\n    attach() { }\n    /** Blocks page-level scroll while the attached overlay is open. */\n    enable() {\n        if (this._canBeEnabled()) {\n            const root = this._document.documentElement;\n            this._previousScrollPosition = this._viewportRuler.getViewportScrollPosition();\n            // Cache the previous inline styles in case the user had set them.\n            this._previousHTMLStyles.left = root.style.left || '';\n            this._previousHTMLStyles.top = root.style.top || '';\n            // Note: we're using the `html` node, instead of the `body`, because the `body` may\n            // have the user agent margin, whereas the `html` is guaranteed not to have one.\n            root.style.left = coerceCssPixelValue(-this._previousScrollPosition.left);\n            root.style.top = coerceCssPixelValue(-this._previousScrollPosition.top);\n            root.classList.add('cdk-global-scrollblock');\n            this._isEnabled = true;\n        }\n    }\n    /** Unblocks page-level scroll while the attached overlay is open. */\n    disable() {\n        if (this._isEnabled) {\n            const html = this._document.documentElement;\n            const body = this._document.body;\n            const htmlStyle = html.style;\n            const bodyStyle = body.style;\n            const previousHtmlScrollBehavior = htmlStyle.scrollBehavior || '';\n            const previousBodyScrollBehavior = bodyStyle.scrollBehavior || '';\n            this._isEnabled = false;\n            htmlStyle.left = this._previousHTMLStyles.left;\n            htmlStyle.top = this._previousHTMLStyles.top;\n            html.classList.remove('cdk-global-scrollblock');\n            // Disable user-defined smooth scrolling temporarily while we restore the scroll position.\n            // See https://developer.mozilla.org/en-US/docs/Web/CSS/scroll-behavior\n            // Note that we don't mutate the property if the browser doesn't support `scroll-behavior`,\n            // because it can throw off feature detections in `supportsScrollBehavior` which\n            // checks for `'scrollBehavior' in documentElement.style`.\n            if (scrollBehaviorSupported) {\n                htmlStyle.scrollBehavior = bodyStyle.scrollBehavior = 'auto';\n            }\n            window.scroll(this._previousScrollPosition.left, this._previousScrollPosition.top);\n            if (scrollBehaviorSupported) {\n                htmlStyle.scrollBehavior = previousHtmlScrollBehavior;\n                bodyStyle.scrollBehavior = previousBodyScrollBehavior;\n            }\n        }\n    }\n    _canBeEnabled() {\n        // Since the scroll strategies can't be singletons, we have to use a global CSS class\n        // (`cdk-global-scrollblock`) to make sure that we don't try to disable global\n        // scrolling multiple times.\n        const html = this._document.documentElement;\n        if (html.classList.contains('cdk-global-scrollblock') || this._isEnabled) {\n            return false;\n        }\n        const body = this._document.body;\n        const viewport = this._viewportRuler.getViewportSize();\n        return body.scrollHeight > viewport.height || body.scrollWidth > viewport.width;\n    }\n}\n\n/**\n * @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/**\n * Returns an error to be thrown when attempting to attach an already-attached scroll strategy.\n */\nfunction getMatScrollStrategyAlreadyAttachedError() {\n    return Error(`Scroll strategy has already been attached.`);\n}\n\n/**\n * Strategy that will close the overlay as soon as the user starts scrolling.\n */\nclass CloseScrollStrategy {\n    constructor(_scrollDispatcher, _ngZone, _viewportRuler, _config) {\n        this._scrollDispatcher = _scrollDispatcher;\n        this._ngZone = _ngZone;\n        this._viewportRuler = _viewportRuler;\n        this._config = _config;\n        this._scrollSubscription = null;\n        /** Detaches the overlay ref and disables the scroll strategy. */\n        this._detach = () => {\n            this.disable();\n            if (this._overlayRef.hasAttached()) {\n                this._ngZone.run(() => this._overlayRef.detach());\n            }\n        };\n    }\n    /** Attaches this scroll strategy to an overlay. */\n    attach(overlayRef) {\n        if (this._overlayRef && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n            throw getMatScrollStrategyAlreadyAttachedError();\n        }\n        this._overlayRef = overlayRef;\n    }\n    /** Enables the closing of the attached overlay on scroll. */\n    enable() {\n        if (this._scrollSubscription) {\n            return;\n        }\n        const stream = this._scrollDispatcher.scrolled(0);\n        if (this._config && this._config.threshold && this._config.threshold > 1) {\n            this._initialScrollPosition = this._viewportRuler.getViewportScrollPosition().top;\n            this._scrollSubscription = stream.subscribe(() => {\n                const scrollPosition = this._viewportRuler.getViewportScrollPosition().top;\n                if (Math.abs(scrollPosition - this._initialScrollPosition) > this._config.threshold) {\n                    this._detach();\n                }\n                else {\n                    this._overlayRef.updatePosition();\n                }\n            });\n        }\n        else {\n            this._scrollSubscription = stream.subscribe(this._detach);\n        }\n    }\n    /** Disables the closing the attached overlay on scroll. */\n    disable() {\n        if (this._scrollSubscription) {\n            this._scrollSubscription.unsubscribe();\n            this._scrollSubscription = null;\n        }\n    }\n    detach() {\n        this.disable();\n        this._overlayRef = null;\n    }\n}\n\n/**\n * @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/** Scroll strategy that doesn't do anything. */\nclass NoopScrollStrategy {\n    /** Does nothing, as this scroll strategy is a no-op. */\n    enable() { }\n    /** Does nothing, as this scroll strategy is a no-op. */\n    disable() { }\n    /** Does nothing, as this scroll strategy is a no-op. */\n    attach() { }\n}\n\n/**\n * @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/**\n * Gets whether an element is scrolled outside of view by any of its parent scrolling containers.\n * @param element Dimensions of the element (from getBoundingClientRect)\n * @param scrollContainers Dimensions of element's scrolling containers (from getBoundingClientRect)\n * @returns Whether the element is scrolled out of view\n * @docs-private\n */\nfunction isElementScrolledOutsideView(element, scrollContainers) {\n    return scrollContainers.some(containerBounds => {\n        const outsideAbove = element.bottom < containerBounds.top;\n        const outsideBelow = element.top > containerBounds.bottom;\n        const outsideLeft = element.right < containerBounds.left;\n        const outsideRight = element.left > containerBounds.right;\n        return outsideAbove || outsideBelow || outsideLeft || outsideRight;\n    });\n}\n/**\n * Gets whether an element is clipped by any of its scrolling containers.\n * @param element Dimensions of the element (from getBoundingClientRect)\n * @param scrollContainers Dimensions of element's scrolling containers (from getBoundingClientRect)\n * @returns Whether the element is clipped\n * @docs-private\n */\nfunction isElementClippedByScrolling(element, scrollContainers) {\n    return scrollContainers.some(scrollContainerRect => {\n        const clippedAbove = element.top < scrollContainerRect.top;\n        const clippedBelow = element.bottom > scrollContainerRect.bottom;\n        const clippedLeft = element.left < scrollContainerRect.left;\n        const clippedRight = element.right > scrollContainerRect.right;\n        return clippedAbove || clippedBelow || clippedLeft || clippedRight;\n    });\n}\n\n/**\n * @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/**\n * Strategy that will update the element position as the user is scrolling.\n */\nclass RepositionScrollStrategy {\n    constructor(_scrollDispatcher, _viewportRuler, _ngZone, _config) {\n        this._scrollDispatcher = _scrollDispatcher;\n        this._viewportRuler = _viewportRuler;\n        this._ngZone = _ngZone;\n        this._config = _config;\n        this._scrollSubscription = null;\n    }\n    /** Attaches this scroll strategy to an overlay. */\n    attach(overlayRef) {\n        if (this._overlayRef && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n            throw getMatScrollStrategyAlreadyAttachedError();\n        }\n        this._overlayRef = overlayRef;\n    }\n    /** Enables repositioning of the attached overlay on scroll. */\n    enable() {\n        if (!this._scrollSubscription) {\n            const throttle = this._config ? this._config.scrollThrottle : 0;\n            this._scrollSubscription = this._scrollDispatcher.scrolled(throttle).subscribe(() => {\n                this._overlayRef.updatePosition();\n                // TODO(crisbeto): make `close` on by default once all components can handle it.\n                if (this._config && this._config.autoClose) {\n                    const overlayRect = this._overlayRef.overlayElement.getBoundingClientRect();\n                    const { width, height } = this._viewportRuler.getViewportSize();\n                    // TODO(crisbeto): include all ancestor scroll containers here once\n                    // we have a way of exposing the trigger element to the scroll strategy.\n                    const parentRects = [{ width, height, bottom: height, right: width, top: 0, left: 0 }];\n                    if (isElementScrolledOutsideView(overlayRect, parentRects)) {\n                        this.disable();\n                        this._ngZone.run(() => this._overlayRef.detach());\n                    }\n                }\n            });\n        }\n    }\n    /** Disables repositioning of the attached overlay on scroll. */\n    disable() {\n        if (this._scrollSubscription) {\n            this._scrollSubscription.unsubscribe();\n            this._scrollSubscription = null;\n        }\n    }\n    detach() {\n        this.disable();\n        this._overlayRef = null;\n    }\n}\n\n/**\n * Options for how an overlay will handle scrolling.\n *\n * Users can provide a custom value for `ScrollStrategyOptions` to replace the default\n * behaviors. This class primarily acts as a factory for ScrollStrategy instances.\n */\nclass ScrollStrategyOptions {\n    constructor(_scrollDispatcher, _viewportRuler, _ngZone, document) {\n        this._scrollDispatcher = _scrollDispatcher;\n        this._viewportRuler = _viewportRuler;\n        this._ngZone = _ngZone;\n        /** Do nothing on scroll. */\n        this.noop = () => new NoopScrollStrategy();\n        /**\n         * Close the overlay as soon as the user scrolls.\n         * @param config Configuration to be used inside the scroll strategy.\n         */\n        this.close = (config) => new CloseScrollStrategy(this._scrollDispatcher, this._ngZone, this._viewportRuler, config);\n        /** Block scrolling. */\n        this.block = () => new BlockScrollStrategy(this._viewportRuler, this._document);\n        /**\n         * Update the overlay's position on scroll.\n         * @param config Configuration to be used inside the scroll strategy.\n         * Allows debouncing the reposition calls.\n         */\n        this.reposition = (config) => new RepositionScrollStrategy(this._scrollDispatcher, this._viewportRuler, this._ngZone, config);\n        this._document = document;\n    }\n}\nScrollStrategyOptions.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: ScrollStrategyOptions, deps: [{ token: i1.ScrollDispatcher }, { token: i1.ViewportRuler }, { token: i0.NgZone }, { token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });\nScrollStrategyOptions.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: ScrollStrategyOptions, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: ScrollStrategyOptions, decorators: [{\n            type: Injectable,\n            args: [{ providedIn: 'root' }]\n        }], ctorParameters: function () {\n        return [{ type: i1.ScrollDispatcher }, { type: i1.ViewportRuler }, { type: i0.NgZone }, { type: undefined, decorators: [{\n                        type: Inject,\n                        args: [DOCUMENT]\n                    }] }];\n    } });\n\n/**\n * @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\n/**\n * @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/** Initial configuration used when creating an overlay. */\nclass OverlayConfig {\n    constructor(config) {\n        /** Strategy to be used when handling scroll events while the overlay is open. */\n        this.scrollStrategy = new NoopScrollStrategy();\n        /** Custom class to add to the overlay pane. */\n        this.panelClass = '';\n        /** Whether the overlay has a backdrop. */\n        this.hasBackdrop = false;\n        /** Custom class to add to the backdrop */\n        this.backdropClass = 'cdk-overlay-dark-backdrop';\n        /**\n         * Whether the overlay should be disposed of when the user goes backwards/forwards in history.\n         * Note that this usually doesn't include clicking on links (unless the user is using\n         * the `HashLocationStrategy`).\n         */\n        this.disposeOnNavigation = false;\n        if (config) {\n            // Use `Iterable` instead of `Array` because TypeScript, as of 3.6.3,\n            // loses the array generic type in the `for of`. But we *also* have to use `Array` because\n            // typescript won't iterate over an `Iterable` unless you compile with `--downlevelIteration`\n            const configKeys = Object.keys(config);\n            for (const key of configKeys) {\n                if (config[key] !== undefined) {\n                    // TypeScript, as of version 3.5, sees the left-hand-side of this expression\n                    // as \"I don't know *which* key this is, so the only valid value is the intersection\n                    // of all the posible values.\" In this case, that happens to be `undefined`. TypeScript\n                    // is not smart enough to see that the right-hand-side is actually an access of the same\n                    // exact type with the same exact key, meaning that the value type must be identical.\n                    // So we use `any` to work around this.\n                    this[key] = config[key];\n                }\n            }\n        }\n    }\n}\n\n/**\n * @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/** The points of the origin element and the overlay element to connect. */\nclass ConnectionPositionPair {\n    constructor(origin, overlay, \n    /** Offset along the X axis. */\n    offsetX, \n    /** Offset along the Y axis. */\n    offsetY, \n    /** Class(es) to be applied to the panel while this position is active. */\n    panelClass) {\n        this.offsetX = offsetX;\n        this.offsetY = offsetY;\n        this.panelClass = panelClass;\n        this.originX = origin.originX;\n        this.originY = origin.originY;\n        this.overlayX = overlay.overlayX;\n        this.overlayY = overlay.overlayY;\n    }\n}\n/**\n * Set of properties regarding the position of the origin and overlay relative to the viewport\n * with respect to the containing Scrollable elements.\n *\n * The overlay and origin are clipped if any part of their bounding client rectangle exceeds the\n * bounds of any one of the strategy's Scrollable's bounding client rectangle.\n *\n * The overlay and origin are outside view if there is no overlap between their bounding client\n * rectangle and any one of the strategy's Scrollable's bounding client rectangle.\n *\n *       -----------                    -----------\n *       | outside |                    | clipped |\n *       |  view   |              --------------------------\n *       |         |              |     |         |        |\n *       ----------               |     -----------        |\n *  --------------------------    |                        |\n *  |                        |    |      Scrollable        |\n *  |                        |    |                        |\n *  |                        |     --------------------------\n *  |      Scrollable        |\n *  |                        |\n *  --------------------------\n *\n *  @docs-private\n */\nclass ScrollingVisibility {\n}\n/** The change event emitted by the strategy when a fallback position is used. */\nclass ConnectedOverlayPositionChange {\n    constructor(\n    /** The position used as a result of this change. */\n    connectionPair, \n    /** @docs-private */\n    scrollableViewProperties) {\n        this.connectionPair = connectionPair;\n        this.scrollableViewProperties = scrollableViewProperties;\n    }\n}\n/**\n * Validates whether a vertical position property matches the expected values.\n * @param property Name of the property being validated.\n * @param value Value of the property being validated.\n * @docs-private\n */\nfunction validateVerticalPosition(property, value) {\n    if (value !== 'top' && value !== 'bottom' && value !== 'center') {\n        throw Error(`ConnectedPosition: Invalid ${property} \"${value}\". ` +\n            `Expected \"top\", \"bottom\" or \"center\".`);\n    }\n}\n/**\n * Validates whether a horizontal position property matches the expected values.\n * @param property Name of the property being validated.\n * @param value Value of the property being validated.\n * @docs-private\n */\nfunction validateHorizontalPosition(property, value) {\n    if (value !== 'start' && value !== 'end' && value !== 'center') {\n        throw Error(`ConnectedPosition: Invalid ${property} \"${value}\". ` +\n            `Expected \"start\", \"end\" or \"center\".`);\n    }\n}\n\n/**\n * @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/**\n * Reference to an overlay that has been created with the Overlay service.\n * Used to manipulate or dispose of said overlay.\n */\nclass OverlayRef {\n    constructor(_portalOutlet, _host, _pane, _config, _ngZone, _keyboardDispatcher, _document, _location, _outsideClickDispatcher) {\n        this._portalOutlet = _portalOutlet;\n        this._host = _host;\n        this._pane = _pane;\n        this._config = _config;\n        this._ngZone = _ngZone;\n        this._keyboardDispatcher = _keyboardDispatcher;\n        this._document = _document;\n        this._location = _location;\n        this._outsideClickDispatcher = _outsideClickDispatcher;\n        this._backdropElement = null;\n        this._backdropClick = new Subject();\n        this._attachments = new Subject();\n        this._detachments = new Subject();\n        this._locationChanges = Subscription.EMPTY;\n        this._backdropClickHandler = (event) => this._backdropClick.next(event);\n        /** Stream of keydown events dispatched to this overlay. */\n        this._keydownEvents = new Subject();\n        /** Stream of mouse outside events dispatched to this overlay. */\n        this._outsidePointerEvents = new Subject();\n        if (_config.scrollStrategy) {\n            this._scrollStrategy = _config.scrollStrategy;\n            this._scrollStrategy.attach(this);\n        }\n        this._positionStrategy = _config.positionStrategy;\n    }\n    /** The overlay's HTML element */\n    get overlayElement() {\n        return this._pane;\n    }\n    /** The overlay's backdrop HTML element. */\n    get backdropElement() {\n        return this._backdropElement;\n    }\n    /**\n     * Wrapper around the panel element. Can be used for advanced\n     * positioning where a wrapper with specific styling is\n     * required around the overlay pane.\n     */\n    get hostElement() {\n        return this._host;\n    }\n    /**\n     * Attaches content, given via a Portal, to the overlay.\n     * If the overlay is configured to have a backdrop, it will be created.\n     *\n     * @param portal Portal instance to which to attach the overlay.\n     * @returns The portal attachment result.\n     */\n    attach(portal) {\n        let attachResult = this._portalOutlet.attach(portal);\n        // Update the pane element with the given configuration.\n        if (!this._host.parentElement && this._previousHostParent) {\n            this._previousHostParent.appendChild(this._host);\n        }\n        if (this._positionStrategy) {\n            this._positionStrategy.attach(this);\n        }\n        this._updateStackingOrder();\n        this._updateElementSize();\n        this._updateElementDirection();\n        if (this._scrollStrategy) {\n            this._scrollStrategy.enable();\n        }\n        // Update the position once the zone is stable so that the overlay will be fully rendered\n        // before attempting to position it, as the position may depend on the size of the rendered\n        // content.\n        this._ngZone.onStable.pipe(take(1)).subscribe(() => {\n            // The overlay could've been detached before the zone has stabilized.\n            if (this.hasAttached()) {\n                this.updatePosition();\n            }\n        });\n        // Enable pointer events for the overlay pane element.\n        this._togglePointerEvents(true);\n        if (this._config.hasBackdrop) {\n            this._attachBackdrop();\n        }\n        if (this._config.panelClass) {\n            this._toggleClasses(this._pane, this._config.panelClass, true);\n        }\n        // Only emit the `attachments` event once all other setup is done.\n        this._attachments.next();\n        // Track this overlay by the keyboard dispatcher\n        this._keyboardDispatcher.add(this);\n        if (this._config.disposeOnNavigation) {\n            this._locationChanges = this._location.subscribe(() => this.dispose());\n        }\n        this._outsideClickDispatcher.add(this);\n        return attachResult;\n    }\n    /**\n     * Detaches an overlay from a portal.\n     * @returns The portal detachment result.\n     */\n    detach() {\n        if (!this.hasAttached()) {\n            return;\n        }\n        this.detachBackdrop();\n        // When the overlay is detached, the pane element should disable pointer events.\n        // This is necessary because otherwise the pane element will cover the page and disable\n        // pointer events therefore. Depends on the position strategy and the applied pane boundaries.\n        this._togglePointerEvents(false);\n        if (this._positionStrategy && this._positionStrategy.detach) {\n            this._positionStrategy.detach();\n        }\n        if (this._scrollStrategy) {\n            this._scrollStrategy.disable();\n        }\n        const detachmentResult = this._portalOutlet.detach();\n        // Only emit after everything is detached.\n        this._detachments.next();\n        // Remove this overlay from keyboard dispatcher tracking.\n        this._keyboardDispatcher.remove(this);\n        // Keeping the host element in the DOM can cause scroll jank, because it still gets\n        // rendered, even though it's transparent and unclickable which is why we remove it.\n        this._detachContentWhenStable();\n        this._locationChanges.unsubscribe();\n        this._outsideClickDispatcher.remove(this);\n        return detachmentResult;\n    }\n    /** Cleans up the overlay from the DOM. */\n    dispose() {\n        var _a;\n        const isAttached = this.hasAttached();\n        if (this._positionStrategy) {\n            this._positionStrategy.dispose();\n        }\n        this._disposeScrollStrategy();\n        this._disposeBackdrop(this._backdropElement);\n        this._locationChanges.unsubscribe();\n        this._keyboardDispatcher.remove(this);\n        this._portalOutlet.dispose();\n        this._attachments.complete();\n        this._backdropClick.complete();\n        this._keydownEvents.complete();\n        this._outsidePointerEvents.complete();\n        this._outsideClickDispatcher.remove(this);\n        (_a = this._host) === null || _a === void 0 ? void 0 : _a.remove();\n        this._previousHostParent = this._pane = this._host = null;\n        if (isAttached) {\n            this._detachments.next();\n        }\n        this._detachments.complete();\n    }\n    /** Whether the overlay has attached content. */\n    hasAttached() {\n        return this._portalOutlet.hasAttached();\n    }\n    /** Gets an observable that emits when the backdrop has been clicked. */\n    backdropClick() {\n        return this._backdropClick;\n    }\n    /** Gets an observable that emits when the overlay has been attached. */\n    attachments() {\n        return this._attachments;\n    }\n    /** Gets an observable that emits when the overlay has been detached. */\n    detachments() {\n        return this._detachments;\n    }\n    /** Gets an observable of keydown events targeted to this overlay. */\n    keydownEvents() {\n        return this._keydownEvents;\n    }\n    /** Gets an observable of pointer events targeted outside this overlay. */\n    outsidePointerEvents() {\n        return this._outsidePointerEvents;\n    }\n    /** Gets the current overlay configuration, which is immutable. */\n    getConfig() {\n        return this._config;\n    }\n    /** Updates the position of the overlay based on the position strategy. */\n    updatePosition() {\n        if (this._positionStrategy) {\n            this._positionStrategy.apply();\n        }\n    }\n    /** Switches to a new position strategy and updates the overlay position. */\n    updatePositionStrategy(strategy) {\n        if (strategy === this._positionStrategy) {\n            return;\n        }\n        if (this._positionStrategy) {\n            this._positionStrategy.dispose();\n        }\n        this._positionStrategy = strategy;\n        if (this.hasAttached()) {\n            strategy.attach(this);\n            this.updatePosition();\n        }\n    }\n    /** Update the size properties of the overlay. */\n    updateSize(sizeConfig) {\n        this._config = Object.assign(Object.assign({}, this._config), sizeConfig);\n        this._updateElementSize();\n    }\n    /** Sets the LTR/RTL direction for the overlay. */\n    setDirection(dir) {\n        this._config = Object.assign(Object.assign({}, this._config), { direction: dir });\n        this._updateElementDirection();\n    }\n    /** Add a CSS class or an array of classes to the overlay pane. */\n    addPanelClass(classes) {\n        if (this._pane) {\n            this._toggleClasses(this._pane, classes, true);\n        }\n    }\n    /** Remove a CSS class or an array of classes from the overlay pane. */\n    removePanelClass(classes) {\n        if (this._pane) {\n            this._toggleClasses(this._pane, classes, false);\n        }\n    }\n    /**\n     * Returns the layout direction of the overlay panel.\n     */\n    getDirection() {\n        const direction = this._config.direction;\n        if (!direction) {\n            return 'ltr';\n        }\n        return typeof direction === 'string' ? direction : direction.value;\n    }\n    /** Switches to a new scroll strategy. */\n    updateScrollStrategy(strategy) {\n        if (strategy === this._scrollStrategy) {\n            return;\n        }\n        this._disposeScrollStrategy();\n        this._scrollStrategy = strategy;\n        if (this.hasAttached()) {\n            strategy.attach(this);\n            strategy.enable();\n        }\n    }\n    /** Updates the text direction of the overlay panel. */\n    _updateElementDirection() {\n        this._host.setAttribute('dir', this.getDirection());\n    }\n    /** Updates the size of the overlay element based on the overlay config. */\n    _updateElementSize() {\n        if (!this._pane) {\n            return;\n        }\n        const style = this._pane.style;\n        style.width = coerceCssPixelValue(this._config.width);\n        style.height = coerceCssPixelValue(this._config.height);\n        style.minWidth = coerceCssPixelValue(this._config.minWidth);\n        style.minHeight = coerceCssPixelValue(this._config.minHeight);\n        style.maxWidth = coerceCssPixelValue(this._config.maxWidth);\n        style.maxHeight = coerceCssPixelValue(this._config.maxHeight);\n    }\n    /** Toggles the pointer events for the overlay pane element. */\n    _togglePointerEvents(enablePointer) {\n        this._pane.style.pointerEvents = enablePointer ? '' : 'none';\n    }\n    /** Attaches a backdrop for this overlay. */\n    _attachBackdrop() {\n        const showingClass = 'cdk-overlay-backdrop-showing';\n        this._backdropElement = this._document.createElement('div');\n        this._backdropElement.classList.add('cdk-overlay-backdrop');\n        if (this._config.backdropClass) {\n            this._toggleClasses(this._backdropElement, this._config.backdropClass, true);\n        }\n        // Insert the backdrop before the pane in the DOM order,\n        // in order to handle stacked overlays properly.\n        this._host.parentElement.insertBefore(this._backdropElement, this._host);\n        // Forward backdrop clicks such that the consumer of the overlay can perform whatever\n        // action desired when such a click occurs (usually closing the overlay).\n        this._backdropElement.addEventListener('click', this._backdropClickHandler);\n        // Add class to fade-in the backdrop after one frame.\n        if (typeof requestAnimationFrame !== 'undefined') {\n            this._ngZone.runOutsideAngular(() => {\n                requestAnimationFrame(() => {\n                    if (this._backdropElement) {\n                        this._backdropElement.classList.add(showingClass);\n                    }\n                });\n            });\n        }\n        else {\n            this._backdropElement.classList.add(showingClass);\n        }\n    }\n    /**\n     * Updates the stacking order of the element, moving it to the top if necessary.\n     * This is required in cases where one overlay was detached, while another one,\n     * that should be behind it, was destroyed. The next time both of them are opened,\n     * the stacking will be wrong, because the detached element's pane will still be\n     * in its original DOM position.\n     */\n    _updateStackingOrder() {\n        if (this._host.nextSibling) {\n            this._host.parentNode.appendChild(this._host);\n        }\n    }\n    /** Detaches the backdrop (if any) associated with the overlay. */\n    detachBackdrop() {\n        const backdropToDetach = this._backdropElement;\n        if (!backdropToDetach) {\n            return;\n        }\n        let timeoutId;\n        const finishDetach = () => {\n            // It may not be attached to anything in certain cases (e.g. unit tests).\n            if (backdropToDetach) {\n                backdropToDetach.removeEventListener('click', this._backdropClickHandler);\n                backdropToDetach.removeEventListener('transitionend', finishDetach);\n                this._disposeBackdrop(backdropToDetach);\n            }\n            if (this._config.backdropClass) {\n                this._toggleClasses(backdropToDetach, this._config.backdropClass, false);\n            }\n            clearTimeout(timeoutId);\n        };\n        backdropToDetach.classList.remove('cdk-overlay-backdrop-showing');\n        this._ngZone.runOutsideAngular(() => {\n            backdropToDetach.addEventListener('transitionend', finishDetach);\n        });\n        // If the backdrop doesn't have a transition, the `transitionend` event won't fire.\n        // In this case we make it unclickable and we try to remove it after a delay.\n        backdropToDetach.style.pointerEvents = 'none';\n        // Run this outside the Angular zone because there's nothing that Angular cares about.\n        // If it were to run inside the Angular zone, every test that used Overlay would have to be\n        // either async or fakeAsync.\n        timeoutId = this._ngZone.runOutsideAngular(() => setTimeout(finishDetach, 500));\n    }\n    /** Toggles a single CSS class or an array of classes on an element. */\n    _toggleClasses(element, cssClasses, isAdd) {\n        const classes = coerceArray(cssClasses || []).filter(c => !!c);\n        if (classes.length) {\n            isAdd ? element.classList.add(...classes) : element.classList.remove(...classes);\n        }\n    }\n    /** Detaches the overlay content next time the zone stabilizes. */\n    _detachContentWhenStable() {\n        // Normally we wouldn't have to explicitly run this outside the `NgZone`, however\n        // if the consumer is using `zone-patch-rxjs`, the `Subscription.unsubscribe` call will\n        // be patched to run inside the zone, which will throw us into an infinite loop.\n        this._ngZone.runOutsideAngular(() => {\n            // We can't remove the host here immediately, because the overlay pane's content\n            // might still be animating. This stream helps us avoid interrupting the animation\n            // by waiting for the pane to become empty.\n            const subscription = this._ngZone.onStable\n                .pipe(takeUntil(merge(this._attachments, this._detachments)))\n                .subscribe(() => {\n                // Needs a couple of checks for the pane and host, because\n                // they may have been removed by the time the zone stabilizes.\n                if (!this._pane || !this._host || this._pane.children.length === 0) {\n                    if (this._pane && this._config.panelClass) {\n                        this._toggleClasses(this._pane, this._config.panelClass, false);\n                    }\n                    if (this._host && this._host.parentElement) {\n                        this._previousHostParent = this._host.parentElement;\n                        this._host.remove();\n                    }\n                    subscription.unsubscribe();\n                }\n            });\n        });\n    }\n    /** Disposes of a scroll strategy. */\n    _disposeScrollStrategy() {\n        const scrollStrategy = this._scrollStrategy;\n        if (scrollStrategy) {\n            scrollStrategy.disable();\n            if (scrollStrategy.detach) {\n                scrollStrategy.detach();\n            }\n        }\n    }\n    /** Removes a backdrop element from the DOM. */\n    _disposeBackdrop(backdrop) {\n        if (backdrop) {\n            backdrop.remove();\n            // It is possible that a new portal has been attached to this overlay since we started\n            // removing the backdrop. If that is the case, only clear the backdrop reference if it\n            // is still the same instance that we started to remove.\n            if (this._backdropElement === backdrop) {\n                this._backdropElement = null;\n            }\n        }\n    }\n}\n\n/**\n * @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/** Container inside which all overlays will render. */\nclass OverlayContainer {\n    constructor(document, _platform) {\n        this._platform = _platform;\n        this._document = document;\n    }\n    ngOnDestroy() {\n        var _a;\n        (_a = this._containerElement) === null || _a === void 0 ? void 0 : _a.remove();\n    }\n    /**\n     * This method returns the overlay container element. It will lazily\n     * create the element the first time it is called to facilitate using\n     * the container in non-browser environments.\n     * @returns the container element\n     */\n    getContainerElement() {\n        if (!this._containerElement) {\n            this._createContainer();\n        }\n        return this._containerElement;\n    }\n    /**\n     * Create the overlay container element, which is simply a div\n     * with the 'cdk-overlay-container' class on the document body.\n     */\n    _createContainer() {\n        const containerClass = 'cdk-overlay-container';\n        // TODO(crisbeto): remove the testing check once we have an overlay testing\n        // module or Angular starts tearing down the testing `NgModule`. See:\n        // https://github.com/angular/angular/issues/18831\n        if (this._platform.isBrowser || _isTestEnvironment()) {\n            const oppositePlatformContainers = this._document.querySelectorAll(`.${containerClass}[platform=\"server\"], ` + `.${containerClass}[platform=\"test\"]`);\n            // Remove any old containers from the opposite platform.\n            // This can happen when transitioning from the server to the client.\n            for (let i = 0; i < oppositePlatformContainers.length; i++) {\n                oppositePlatformContainers[i].remove();\n            }\n        }\n        const container = this._document.createElement('div');\n        container.classList.add(containerClass);\n        // A long time ago we kept adding new overlay containers whenever a new app was instantiated,\n        // but at some point we added logic which clears the duplicate ones in order to avoid leaks.\n        // The new logic was a little too aggressive since it was breaking some legitimate use cases.\n        // To mitigate the problem we made it so that only containers from a different platform are\n        // cleared, but the side-effect was that people started depending on the overly-aggressive\n        // logic to clean up their tests for them. Until we can introduce an overlay-specific testing\n        // module which does the cleanup, we try to detect that we're in a test environment and we\n        // always clear the container. See #17006.\n        // TODO(crisbeto): remove the test environment check once we have an overlay testing module.\n        if (_isTestEnvironment()) {\n            container.setAttribute('platform', 'test');\n        }\n        else if (!this._platform.isBrowser) {\n            container.setAttribute('platform', 'server');\n        }\n        this._document.body.appendChild(container);\n        this._containerElement = container;\n    }\n}\nOverlayContainer.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayContainer, deps: [{ token: DOCUMENT }, { token: i1$1.Platform }], target: i0.ɵɵFactoryTarget.Injectable });\nOverlayContainer.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayContainer, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayContainer, decorators: [{\n            type: Injectable,\n            args: [{ providedIn: 'root' }]\n        }], ctorParameters: function () {\n        return [{ type: undefined, decorators: [{\n                        type: Inject,\n                        args: [DOCUMENT]\n                    }] }, { type: i1$1.Platform }];\n    } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// TODO: refactor clipping detection into a separate thing (part of scrolling module)\n// TODO: doesn't handle both flexible width and height when it has to scroll along both axis.\n/** Class to be added to the overlay bounding box. */\nconst boundingBoxClass = 'cdk-overlay-connected-position-bounding-box';\n/** Regex used to split a string on its CSS units. */\nconst cssUnitPattern = /([A-Za-z%]+)$/;\n/**\n * A strategy for positioning overlays. Using this strategy, an overlay is given an\n * implicit position relative some origin element. The relative position is defined in terms of\n * a point on the origin element that is connected to a point on the overlay element. For example,\n * a basic dropdown is connecting the bottom-left corner of the origin to the top-left corner\n * of the overlay.\n */\nclass FlexibleConnectedPositionStrategy {\n    constructor(connectedTo, _viewportRuler, _document, _platform, _overlayContainer) {\n        this._viewportRuler = _viewportRuler;\n        this._document = _document;\n        this._platform = _platform;\n        this._overlayContainer = _overlayContainer;\n        /** Last size used for the bounding box. Used to avoid resizing the overlay after open. */\n        this._lastBoundingBoxSize = { width: 0, height: 0 };\n        /** Whether the overlay was pushed in a previous positioning. */\n        this._isPushed = false;\n        /** Whether the overlay can be pushed on-screen on the initial open. */\n        this._canPush = true;\n        /** Whether the overlay can grow via flexible width/height after the initial open. */\n        this._growAfterOpen = false;\n        /** Whether the overlay's width and height can be constrained to fit within the viewport. */\n        this._hasFlexibleDimensions = true;\n        /** Whether the overlay position is locked. */\n        this._positionLocked = false;\n        /** Amount of space that must be maintained between the overlay and the edge of the viewport. */\n        this._viewportMargin = 0;\n        /** The Scrollable containers used to check scrollable view properties on position change. */\n        this._scrollables = [];\n        /** Ordered list of preferred positions, from most to least desirable. */\n        this._preferredPositions = [];\n        /** Subject that emits whenever the position changes. */\n        this._positionChanges = new Subject();\n        /** Subscription to viewport size changes. */\n        this._resizeSubscription = Subscription.EMPTY;\n        /** Default offset for the overlay along the x axis. */\n        this._offsetX = 0;\n        /** Default offset for the overlay along the y axis. */\n        this._offsetY = 0;\n        /** Keeps track of the CSS classes that the position strategy has applied on the overlay panel. */\n        this._appliedPanelClasses = [];\n        /** Observable sequence of position changes. */\n        this.positionChanges = this._positionChanges;\n        this.setOrigin(connectedTo);\n    }\n    /** Ordered list of preferred positions, from most to least desirable. */\n    get positions() {\n        return this._preferredPositions;\n    }\n    /** Attaches this position strategy to an overlay. */\n    attach(overlayRef) {\n        if (this._overlayRef &&\n            overlayRef !== this._overlayRef &&\n            (typeof ngDevMode === 'undefined' || ngDevMode)) {\n            throw Error('This position strategy is already attached to an overlay');\n        }\n        this._validatePositions();\n        overlayRef.hostElement.classList.add(boundingBoxClass);\n        this._overlayRef = overlayRef;\n        this._boundingBox = overlayRef.hostElement;\n        this._pane = overlayRef.overlayElement;\n        this._isDisposed = false;\n        this._isInitialRender = true;\n        this._lastPosition = null;\n        this._resizeSubscription.unsubscribe();\n        this._resizeSubscription = this._viewportRuler.change().subscribe(() => {\n            // When the window is resized, we want to trigger the next reposition as if it\n            // was an initial render, in order for the strategy to pick a new optimal position,\n            // otherwise position locking will cause it to stay at the old one.\n            this._isInitialRender = true;\n            this.apply();\n        });\n    }\n    /**\n     * Updates the position of the overlay element, using whichever preferred position relative\n     * to the origin best fits on-screen.\n     *\n     * The selection of a position goes as follows:\n     *  - If any positions fit completely within the viewport as-is,\n     *      choose the first position that does so.\n     *  - If flexible dimensions are enabled and at least one satifies the given minimum width/height,\n     *      choose the position with the greatest available size modified by the positions' weight.\n     *  - If pushing is enabled, take the position that went off-screen the least and push it\n     *      on-screen.\n     *  - If none of the previous criteria were met, use the position that goes off-screen the least.\n     * @docs-private\n     */\n    apply() {\n        // We shouldn't do anything if the strategy was disposed or we're on the server.\n        if (this._isDisposed || !this._platform.isBrowser) {\n            return;\n        }\n        // If the position has been applied already (e.g. when the overlay was opened) and the\n        // consumer opted into locking in the position, re-use the old position, in order to\n        // prevent the overlay from jumping around.\n        if (!this._isInitialRender && this._positionLocked && this._lastPosition) {\n            this.reapplyLastPosition();\n            return;\n        }\n        this._clearPanelClasses();\n        this._resetOverlayElementStyles();\n        this._resetBoundingBoxStyles();\n        // We need the bounding rects for the origin and the overlay to determine how to position\n        // the overlay relative to the origin.\n        // We use the viewport rect to determine whether a position would go off-screen.\n        this._viewportRect = this._getNarrowedViewportRect();\n        this._originRect = this._getOriginRect();\n        this._overlayRect = this._pane.getBoundingClientRect();\n        const originRect = this._originRect;\n        const overlayRect = this._overlayRect;\n        const viewportRect = this._viewportRect;\n        // Positions where the overlay will fit with flexible dimensions.\n        const flexibleFits = [];\n        // Fallback if none of the preferred positions fit within the viewport.\n        let fallback;\n        // Go through each of the preferred positions looking for a good fit.\n        // If a good fit is found, it will be applied immediately.\n        for (let pos of this._preferredPositions) {\n            // Get the exact (x, y) coordinate for the point-of-origin on the origin element.\n            let originPoint = this._getOriginPoint(originRect, pos);\n            // From that point-of-origin, get the exact (x, y) coordinate for the top-left corner of the\n            // overlay in this position. We use the top-left corner for calculations and later translate\n            // this into an appropriate (top, left, bottom, right) style.\n            let overlayPoint = this._getOverlayPoint(originPoint, overlayRect, pos);\n            // Calculate how well the overlay would fit into the viewport with this point.\n            let overlayFit = this._getOverlayFit(overlayPoint, overlayRect, viewportRect, pos);\n            // If the overlay, without any further work, fits into the viewport, use this position.\n            if (overlayFit.isCompletelyWithinViewport) {\n                this._isPushed = false;\n                this._applyPosition(pos, originPoint);\n                return;\n            }\n            // If the overlay has flexible dimensions, we can use this position\n            // so long as there's enough space for the minimum dimensions.\n            if (this._canFitWithFlexibleDimensions(overlayFit, overlayPoint, viewportRect)) {\n                // Save positions where the overlay will fit with flexible dimensions. We will use these\n                // if none of the positions fit *without* flexible dimensions.\n                flexibleFits.push({\n                    position: pos,\n                    origin: originPoint,\n                    overlayRect,\n                    boundingBoxRect: this._calculateBoundingBoxRect(originPoint, pos),\n                });\n                continue;\n            }\n            // If the current preferred position does not fit on the screen, remember the position\n            // if it has more visible area on-screen than we've seen and move onto the next preferred\n            // position.\n            if (!fallback || fallback.overlayFit.visibleArea < overlayFit.visibleArea) {\n                fallback = { overlayFit, overlayPoint, originPoint, position: pos, overlayRect };\n            }\n        }\n        // If there are any positions where the overlay would fit with flexible dimensions, choose the\n        // one that has the greatest area available modified by the position's weight\n        if (flexibleFits.length) {\n            let bestFit = null;\n            let bestScore = -1;\n            for (const fit of flexibleFits) {\n                const score = fit.boundingBoxRect.width * fit.boundingBoxRect.height * (fit.position.weight || 1);\n                if (score > bestScore) {\n                    bestScore = score;\n                    bestFit = fit;\n                }\n            }\n            this._isPushed = false;\n            this._applyPosition(bestFit.position, bestFit.origin);\n            return;\n        }\n        // When none of the preferred positions fit within the viewport, take the position\n        // that went off-screen the least and attempt to push it on-screen.\n        if (this._canPush) {\n            // TODO(jelbourn): after pushing, the opening \"direction\" of the overlay might not make sense.\n            this._isPushed = true;\n            this._applyPosition(fallback.position, fallback.originPoint);\n            return;\n        }\n        // All options for getting the overlay within the viewport have been exhausted, so go with the\n        // position that went off-screen the least.\n        this._applyPosition(fallback.position, fallback.originPoint);\n    }\n    detach() {\n        this._clearPanelClasses();\n        this._lastPosition = null;\n        this._previousPushAmount = null;\n        this._resizeSubscription.unsubscribe();\n    }\n    /** Cleanup after the element gets destroyed. */\n    dispose() {\n        if (this._isDisposed) {\n            return;\n        }\n        // We can't use `_resetBoundingBoxStyles` here, because it resets\n        // some properties to zero, rather than removing them.\n        if (this._boundingBox) {\n            extendStyles(this._boundingBox.style, {\n                top: '',\n                left: '',\n                right: '',\n                bottom: '',\n                height: '',\n                width: '',\n                alignItems: '',\n                justifyContent: '',\n            });\n        }\n        if (this._pane) {\n            this._resetOverlayElementStyles();\n        }\n        if (this._overlayRef) {\n            this._overlayRef.hostElement.classList.remove(boundingBoxClass);\n        }\n        this.detach();\n        this._positionChanges.complete();\n        this._overlayRef = this._boundingBox = null;\n        this._isDisposed = true;\n    }\n    /**\n     * This re-aligns the overlay element with the trigger in its last calculated position,\n     * even if a position higher in the \"preferred positions\" list would now fit. This\n     * allows one to re-align the panel without changing the orientation of the panel.\n     */\n    reapplyLastPosition() {\n        if (!this._isDisposed && (!this._platform || this._platform.isBrowser)) {\n            this._originRect = this._getOriginRect();\n            this._overlayRect = this._pane.getBoundingClientRect();\n            this._viewportRect = this._getNarrowedViewportRect();\n            const lastPosition = this._lastPosition || this._preferredPositions[0];\n            const originPoint = this._getOriginPoint(this._originRect, lastPosition);\n            this._applyPosition(lastPosition, originPoint);\n        }\n    }\n    /**\n     * Sets the list of Scrollable containers that host the origin element so that\n     * on reposition we can evaluate if it or the overlay has been clipped or outside view. Every\n     * Scrollable must be an ancestor element of the strategy's origin element.\n     */\n    withScrollableContainers(scrollables) {\n        this._scrollables = scrollables;\n        return this;\n    }\n    /**\n     * Adds new preferred positions.\n     * @param positions List of positions options for this overlay.\n     */\n    withPositions(positions) {\n        this._preferredPositions = positions;\n        // If the last calculated position object isn't part of the positions anymore, clear\n        // it in order to avoid it being picked up if the consumer tries to re-apply.\n        if (positions.indexOf(this._lastPosition) === -1) {\n            this._lastPosition = null;\n        }\n        this._validatePositions();\n        return this;\n    }\n    /**\n     * Sets a minimum distance the overlay may be positioned to the edge of the viewport.\n     * @param margin Required margin between the overlay and the viewport edge in pixels.\n     */\n    withViewportMargin(margin) {\n        this._viewportMargin = margin;\n        return this;\n    }\n    /** Sets whether the overlay's width and height can be constrained to fit within the viewport. */\n    withFlexibleDimensions(flexibleDimensions = true) {\n        this._hasFlexibleDimensions = flexibleDimensions;\n        return this;\n    }\n    /** Sets whether the overlay can grow after the initial open via flexible width/height. */\n    withGrowAfterOpen(growAfterOpen = true) {\n        this._growAfterOpen = growAfterOpen;\n        return this;\n    }\n    /** Sets whether the overlay can be pushed on-screen if none of the provided positions fit. */\n    withPush(canPush = true) {\n        this._canPush = canPush;\n        return this;\n    }\n    /**\n     * Sets whether the overlay's position should be locked in after it is positioned\n     * initially. When an overlay is locked in, it won't attempt to reposition itself\n     * when the position is re-applied (e.g. when the user scrolls away).\n     * @param isLocked Whether the overlay should locked in.\n     */\n    withLockedPosition(isLocked = true) {\n        this._positionLocked = isLocked;\n        return this;\n    }\n    /**\n     * Sets the origin, relative to which to position the overlay.\n     * Using an element origin is useful for building components that need to be positioned\n     * relatively to a trigger (e.g. dropdown menus or tooltips), whereas using a point can be\n     * used for cases like contextual menus which open relative to the user's pointer.\n     * @param origin Reference to the new origin.\n     */\n    setOrigin(origin) {\n        this._origin = origin;\n        return this;\n    }\n    /**\n     * Sets the default offset for the overlay's connection point on the x-axis.\n     * @param offset New offset in the X axis.\n     */\n    withDefaultOffsetX(offset) {\n        this._offsetX = offset;\n        return this;\n    }\n    /**\n     * Sets the default offset for the overlay's connection point on the y-axis.\n     * @param offset New offset in the Y axis.\n     */\n    withDefaultOffsetY(offset) {\n        this._offsetY = offset;\n        return this;\n    }\n    /**\n     * Configures that the position strategy should set a `transform-origin` on some elements\n     * inside the overlay, depending on the current position that is being applied. This is\n     * useful for the cases where the origin of an animation can change depending on the\n     * alignment of the overlay.\n     * @param selector CSS selector that will be used to find the target\n     *    elements onto which to set the transform origin.\n     */\n    withTransformOriginOn(selector) {\n        this._transformOriginSelector = selector;\n        return this;\n    }\n    /**\n     * Gets the (x, y) coordinate of a connection point on the origin based on a relative position.\n     */\n    _getOriginPoint(originRect, pos) {\n        let x;\n        if (pos.originX == 'center') {\n            // Note: when centering we should always use the `left`\n            // offset, otherwise the position will be wrong in RTL.\n            x = originRect.left + originRect.width / 2;\n        }\n        else {\n            const startX = this._isRtl() ? originRect.right : originRect.left;\n            const endX = this._isRtl() ? originRect.left : originRect.right;\n            x = pos.originX == 'start' ? startX : endX;\n        }\n        let y;\n        if (pos.originY == 'center') {\n            y = originRect.top + originRect.height / 2;\n        }\n        else {\n            y = pos.originY == 'top' ? originRect.top : originRect.bottom;\n        }\n        return { x, y };\n    }\n    /**\n     * Gets the (x, y) coordinate of the top-left corner of the overlay given a given position and\n     * origin point to which the overlay should be connected.\n     */\n    _getOverlayPoint(originPoint, overlayRect, pos) {\n        // Calculate the (overlayStartX, overlayStartY), the start of the\n        // potential overlay position relative to the origin point.\n        let overlayStartX;\n        if (pos.overlayX == 'center') {\n            overlayStartX = -overlayRect.width / 2;\n        }\n        else if (pos.overlayX === 'start') {\n            overlayStartX = this._isRtl() ? -overlayRect.width : 0;\n        }\n        else {\n            overlayStartX = this._isRtl() ? 0 : -overlayRect.width;\n        }\n        let overlayStartY;\n        if (pos.overlayY == 'center') {\n            overlayStartY = -overlayRect.height / 2;\n        }\n        else {\n            overlayStartY = pos.overlayY == 'top' ? 0 : -overlayRect.height;\n        }\n        // The (x, y) coordinates of the overlay.\n        return {\n            x: originPoint.x + overlayStartX,\n            y: originPoint.y + overlayStartY,\n        };\n    }\n    /** Gets how well an overlay at the given point will fit within the viewport. */\n    _getOverlayFit(point, rawOverlayRect, viewport, position) {\n        // Round the overlay rect when comparing against the\n        // viewport, because the viewport is always rounded.\n        const overlay = getRoundedBoundingClientRect(rawOverlayRect);\n        let { x, y } = point;\n        let offsetX = this._getOffset(position, 'x');\n        let offsetY = this._getOffset(position, 'y');\n        // Account for the offsets since they could push the overlay out of the viewport.\n        if (offsetX) {\n            x += offsetX;\n        }\n        if (offsetY) {\n            y += offsetY;\n        }\n        // How much the overlay would overflow at this position, on each side.\n        let leftOverflow = 0 - x;\n        let rightOverflow = x + overlay.width - viewport.width;\n        let topOverflow = 0 - y;\n        let bottomOverflow = y + overlay.height - viewport.height;\n        // Visible parts of the element on each axis.\n        let visibleWidth = this._subtractOverflows(overlay.width, leftOverflow, rightOverflow);\n        let visibleHeight = this._subtractOverflows(overlay.height, topOverflow, bottomOverflow);\n        let visibleArea = visibleWidth * visibleHeight;\n        return {\n            visibleArea,\n            isCompletelyWithinViewport: overlay.width * overlay.height === visibleArea,\n            fitsInViewportVertically: visibleHeight === overlay.height,\n            fitsInViewportHorizontally: visibleWidth == overlay.width,\n        };\n    }\n    /**\n     * Whether the overlay can fit within the viewport when it may resize either its width or height.\n     * @param fit How well the overlay fits in the viewport at some position.\n     * @param point The (x, y) coordinates of the overlat at some position.\n     * @param viewport The geometry of the viewport.\n     */\n    _canFitWithFlexibleDimensions(fit, point, viewport) {\n        if (this._hasFlexibleDimensions) {\n            const availableHeight = viewport.bottom - point.y;\n            const availableWidth = viewport.right - point.x;\n            const minHeight = getPixelValue(this._overlayRef.getConfig().minHeight);\n            const minWidth = getPixelValue(this._overlayRef.getConfig().minWidth);\n            const verticalFit = fit.fitsInViewportVertically || (minHeight != null && minHeight <= availableHeight);\n            const horizontalFit = fit.fitsInViewportHorizontally || (minWidth != null && minWidth <= availableWidth);\n            return verticalFit && horizontalFit;\n        }\n        return false;\n    }\n    /**\n     * Gets the point at which the overlay can be \"pushed\" on-screen. If the overlay is larger than\n     * the viewport, the top-left corner will be pushed on-screen (with overflow occuring on the\n     * right and bottom).\n     *\n     * @param start Starting point from which the overlay is pushed.\n     * @param overlay Dimensions of the overlay.\n     * @param scrollPosition Current viewport scroll position.\n     * @returns The point at which to position the overlay after pushing. This is effectively a new\n     *     originPoint.\n     */\n    _pushOverlayOnScreen(start, rawOverlayRect, scrollPosition) {\n        // If the position is locked and we've pushed the overlay already, reuse the previous push\n        // amount, rather than pushing it again. If we were to continue pushing, the element would\n        // remain in the viewport, which goes against the expectations when position locking is enabled.\n        if (this._previousPushAmount && this._positionLocked) {\n            return {\n                x: start.x + this._previousPushAmount.x,\n                y: start.y + this._previousPushAmount.y,\n            };\n        }\n        // Round the overlay rect when comparing against the\n        // viewport, because the viewport is always rounded.\n        const overlay = getRoundedBoundingClientRect(rawOverlayRect);\n        const viewport = this._viewportRect;\n        // Determine how much the overlay goes outside the viewport on each\n        // side, which we'll use to decide which direction to push it.\n        const overflowRight = Math.max(start.x + overlay.width - viewport.width, 0);\n        const overflowBottom = Math.max(start.y + overlay.height - viewport.height, 0);\n        const overflowTop = Math.max(viewport.top - scrollPosition.top - start.y, 0);\n        const overflowLeft = Math.max(viewport.left - scrollPosition.left - start.x, 0);\n        // Amount by which to push the overlay in each axis such that it remains on-screen.\n        let pushX = 0;\n        let pushY = 0;\n        // If the overlay fits completely within the bounds of the viewport, push it from whichever\n        // direction is goes off-screen. Otherwise, push the top-left corner such that its in the\n        // viewport and allow for the trailing end of the overlay to go out of bounds.\n        if (overlay.width <= viewport.width) {\n            pushX = overflowLeft || -overflowRight;\n        }\n        else {\n            pushX = start.x < this._viewportMargin ? viewport.left - scrollPosition.left - start.x : 0;\n        }\n        if (overlay.height <= viewport.height) {\n            pushY = overflowTop || -overflowBottom;\n        }\n        else {\n            pushY = start.y < this._viewportMargin ? viewport.top - scrollPosition.top - start.y : 0;\n        }\n        this._previousPushAmount = { x: pushX, y: pushY };\n        return {\n            x: start.x + pushX,\n            y: start.y + pushY,\n        };\n    }\n    /**\n     * Applies a computed position to the overlay and emits a position change.\n     * @param position The position preference\n     * @param originPoint The point on the origin element where the overlay is connected.\n     */\n    _applyPosition(position, originPoint) {\n        this._setTransformOrigin(position);\n        this._setOverlayElementStyles(originPoint, position);\n        this._setBoundingBoxStyles(originPoint, position);\n        if (position.panelClass) {\n            this._addPanelClasses(position.panelClass);\n        }\n        // Save the last connected position in case the position needs to be re-calculated.\n        this._lastPosition = position;\n        // Notify that the position has been changed along with its change properties.\n        // We only emit if we've got any subscriptions, because the scroll visibility\n        // calculcations can be somewhat expensive.\n        if (this._positionChanges.observers.length) {\n            const scrollableViewProperties = this._getScrollVisibility();\n            const changeEvent = new ConnectedOverlayPositionChange(position, scrollableViewProperties);\n            this._positionChanges.next(changeEvent);\n        }\n        this._isInitialRender = false;\n    }\n    /** Sets the transform origin based on the configured selector and the passed-in position.  */\n    _setTransformOrigin(position) {\n        if (!this._transformOriginSelector) {\n            return;\n        }\n        const elements = this._boundingBox.querySelectorAll(this._transformOriginSelector);\n        let xOrigin;\n        let yOrigin = position.overlayY;\n        if (position.overlayX === 'center') {\n            xOrigin = 'center';\n        }\n        else if (this._isRtl()) {\n            xOrigin = position.overlayX === 'start' ? 'right' : 'left';\n        }\n        else {\n            xOrigin = position.overlayX === 'start' ? 'left' : 'right';\n        }\n        for (let i = 0; i < elements.length; i++) {\n            elements[i].style.transformOrigin = `${xOrigin} ${yOrigin}`;\n        }\n    }\n    /**\n     * Gets the position and size of the overlay's sizing container.\n     *\n     * This method does no measuring and applies no styles so that we can cheaply compute the\n     * bounds for all positions and choose the best fit based on these results.\n     */\n    _calculateBoundingBoxRect(origin, position) {\n        const viewport = this._viewportRect;\n        const isRtl = this._isRtl();\n        let height, top, bottom;\n        if (position.overlayY === 'top') {\n            // Overlay is opening \"downward\" and thus is bound by the bottom viewport edge.\n            top = origin.y;\n            height = viewport.height - top + this._viewportMargin;\n        }\n        else if (position.overlayY === 'bottom') {\n            // Overlay is opening \"upward\" and thus is bound by the top viewport edge. We need to add\n            // the viewport margin back in, because the viewport rect is narrowed down to remove the\n            // margin, whereas the `origin` position is calculated based on its `ClientRect`.\n            bottom = viewport.height - origin.y + this._viewportMargin * 2;\n            height = viewport.height - bottom + this._viewportMargin;\n        }\n        else {\n            // If neither top nor bottom, it means that the overlay is vertically centered on the\n            // origin point. Note that we want the position relative to the viewport, rather than\n            // the page, which is why we don't use something like `viewport.bottom - origin.y` and\n            // `origin.y - viewport.top`.\n            const smallestDistanceToViewportEdge = Math.min(viewport.bottom - origin.y + viewport.top, origin.y);\n            const previousHeight = this._lastBoundingBoxSize.height;\n            height = smallestDistanceToViewportEdge * 2;\n            top = origin.y - smallestDistanceToViewportEdge;\n            if (height > previousHeight && !this._isInitialRender && !this._growAfterOpen) {\n                top = origin.y - previousHeight / 2;\n            }\n        }\n        // The overlay is opening 'right-ward' (the content flows to the right).\n        const isBoundedByRightViewportEdge = (position.overlayX === 'start' && !isRtl) || (position.overlayX === 'end' && isRtl);\n        // The overlay is opening 'left-ward' (the content flows to the left).\n        const isBoundedByLeftViewportEdge = (position.overlayX === 'end' && !isRtl) || (position.overlayX === 'start' && isRtl);\n        let width, left, right;\n        if (isBoundedByLeftViewportEdge) {\n            right = viewport.width - origin.x + this._viewportMargin;\n            width = origin.x - this._viewportMargin;\n        }\n        else if (isBoundedByRightViewportEdge) {\n            left = origin.x;\n            width = viewport.right - origin.x;\n        }\n        else {\n            // If neither start nor end, it means that the overlay is horizontally centered on the\n            // origin point. Note that we want the position relative to the viewport, rather than\n            // the page, which is why we don't use something like `viewport.right - origin.x` and\n            // `origin.x - viewport.left`.\n            const smallestDistanceToViewportEdge = Math.min(viewport.right - origin.x + viewport.left, origin.x);\n            const previousWidth = this._lastBoundingBoxSize.width;\n            width = smallestDistanceToViewportEdge * 2;\n            left = origin.x - smallestDistanceToViewportEdge;\n            if (width > previousWidth && !this._isInitialRender && !this._growAfterOpen) {\n                left = origin.x - previousWidth / 2;\n            }\n        }\n        return { top: top, left: left, bottom: bottom, right: right, width, height };\n    }\n    /**\n     * Sets the position and size of the overlay's sizing wrapper. The wrapper is positioned on the\n     * origin's connection point and stetches to the bounds of the viewport.\n     *\n     * @param origin The point on the origin element where the overlay is connected.\n     * @param position The position preference\n     */\n    _setBoundingBoxStyles(origin, position) {\n        const boundingBoxRect = this._calculateBoundingBoxRect(origin, position);\n        // It's weird if the overlay *grows* while scrolling, so we take the last size into account\n        // when applying a new size.\n        if (!this._isInitialRender && !this._growAfterOpen) {\n            boundingBoxRect.height = Math.min(boundingBoxRect.height, this._lastBoundingBoxSize.height);\n            boundingBoxRect.width = Math.min(boundingBoxRect.width, this._lastBoundingBoxSize.width);\n        }\n        const styles = {};\n        if (this._hasExactPosition()) {\n            styles.top = styles.left = '0';\n            styles.bottom = styles.right = styles.maxHeight = styles.maxWidth = '';\n            styles.width = styles.height = '100%';\n        }\n        else {\n            const maxHeight = this._overlayRef.getConfig().maxHeight;\n            const maxWidth = this._overlayRef.getConfig().maxWidth;\n            styles.height = coerceCssPixelValue(boundingBoxRect.height);\n            styles.top = coerceCssPixelValue(boundingBoxRect.top);\n            styles.bottom = coerceCssPixelValue(boundingBoxRect.bottom);\n            styles.width = coerceCssPixelValue(boundingBoxRect.width);\n            styles.left = coerceCssPixelValue(boundingBoxRect.left);\n            styles.right = coerceCssPixelValue(boundingBoxRect.right);\n            // Push the pane content towards the proper direction.\n            if (position.overlayX === 'center') {\n                styles.alignItems = 'center';\n            }\n            else {\n                styles.alignItems = position.overlayX === 'end' ? 'flex-end' : 'flex-start';\n            }\n            if (position.overlayY === 'center') {\n                styles.justifyContent = 'center';\n            }\n            else {\n                styles.justifyContent = position.overlayY === 'bottom' ? 'flex-end' : 'flex-start';\n            }\n            if (maxHeight) {\n                styles.maxHeight = coerceCssPixelValue(maxHeight);\n            }\n            if (maxWidth) {\n                styles.maxWidth = coerceCssPixelValue(maxWidth);\n            }\n        }\n        this._lastBoundingBoxSize = boundingBoxRect;\n        extendStyles(this._boundingBox.style, styles);\n    }\n    /** Resets the styles for the bounding box so that a new positioning can be computed. */\n    _resetBoundingBoxStyles() {\n        extendStyles(this._boundingBox.style, {\n            top: '0',\n            left: '0',\n            right: '0',\n            bottom: '0',\n            height: '',\n            width: '',\n            alignItems: '',\n            justifyContent: '',\n        });\n    }\n    /** Resets the styles for the overlay pane so that a new positioning can be computed. */\n    _resetOverlayElementStyles() {\n        extendStyles(this._pane.style, {\n            top: '',\n            left: '',\n            bottom: '',\n            right: '',\n            position: '',\n            transform: '',\n        });\n    }\n    /** Sets positioning styles to the overlay element. */\n    _setOverlayElementStyles(originPoint, position) {\n        const styles = {};\n        const hasExactPosition = this._hasExactPosition();\n        const hasFlexibleDimensions = this._hasFlexibleDimensions;\n        const config = this._overlayRef.getConfig();\n        if (hasExactPosition) {\n            const scrollPosition = this._viewportRuler.getViewportScrollPosition();\n            extendStyles(styles, this._getExactOverlayY(position, originPoint, scrollPosition));\n            extendStyles(styles, this._getExactOverlayX(position, originPoint, scrollPosition));\n        }\n        else {\n            styles.position = 'static';\n        }\n        // Use a transform to apply the offsets. We do this because the `center` positions rely on\n        // being in the normal flex flow and setting a `top` / `left` at all will completely throw\n        // off the position. We also can't use margins, because they won't have an effect in some\n        // cases where the element doesn't have anything to \"push off of\". Finally, this works\n        // better both with flexible and non-flexible positioning.\n        let transformString = '';\n        let offsetX = this._getOffset(position, 'x');\n        let offsetY = this._getOffset(position, 'y');\n        if (offsetX) {\n            transformString += `translateX(${offsetX}px) `;\n        }\n        if (offsetY) {\n            transformString += `translateY(${offsetY}px)`;\n        }\n        styles.transform = transformString.trim();\n        // If a maxWidth or maxHeight is specified on the overlay, we remove them. We do this because\n        // we need these values to both be set to \"100%\" for the automatic flexible sizing to work.\n        // The maxHeight and maxWidth are set on the boundingBox in order to enforce the constraint.\n        // Note that this doesn't apply when we have an exact position, in which case we do want to\n        // apply them because they'll be cleared from the bounding box.\n        if (config.maxHeight) {\n            if (hasExactPosition) {\n                styles.maxHeight = coerceCssPixelValue(config.maxHeight);\n            }\n            else if (hasFlexibleDimensions) {\n                styles.maxHeight = '';\n            }\n        }\n        if (config.maxWidth) {\n            if (hasExactPosition) {\n                styles.maxWidth = coerceCssPixelValue(config.maxWidth);\n            }\n            else if (hasFlexibleDimensions) {\n                styles.maxWidth = '';\n            }\n        }\n        extendStyles(this._pane.style, styles);\n    }\n    /** Gets the exact top/bottom for the overlay when not using flexible sizing or when pushing. */\n    _getExactOverlayY(position, originPoint, scrollPosition) {\n        // Reset any existing styles. This is necessary in case the\n        // preferred position has changed since the last `apply`.\n        let styles = { top: '', bottom: '' };\n        let overlayPoint = this._getOverlayPoint(originPoint, this._overlayRect, position);\n        if (this._isPushed) {\n            overlayPoint = this._pushOverlayOnScreen(overlayPoint, this._overlayRect, scrollPosition);\n        }\n        let virtualKeyboardOffset = this._overlayContainer\n            .getContainerElement()\n            .getBoundingClientRect().top;\n        // Normally this would be zero, however when the overlay is attached to an input (e.g. in an\n        // autocomplete), mobile browsers will shift everything in order to put the input in the middle\n        // of the screen and to make space for the virtual keyboard. We need to account for this offset,\n        // otherwise our positioning will be thrown off.\n        overlayPoint.y -= virtualKeyboardOffset;\n        // We want to set either `top` or `bottom` based on whether the overlay wants to appear\n        // above or below the origin and the direction in which the element will expand.\n        if (position.overlayY === 'bottom') {\n            // When using `bottom`, we adjust the y position such that it is the distance\n            // from the bottom of the viewport rather than the top.\n            const documentHeight = this._document.documentElement.clientHeight;\n            styles.bottom = `${documentHeight - (overlayPoint.y + this._overlayRect.height)}px`;\n        }\n        else {\n            styles.top = coerceCssPixelValue(overlayPoint.y);\n        }\n        return styles;\n    }\n    /** Gets the exact left/right for the overlay when not using flexible sizing or when pushing. */\n    _getExactOverlayX(position, originPoint, scrollPosition) {\n        // Reset any existing styles. This is necessary in case the preferred position has\n        // changed since the last `apply`.\n        let styles = { left: '', right: '' };\n        let overlayPoint = this._getOverlayPoint(originPoint, this._overlayRect, position);\n        if (this._isPushed) {\n            overlayPoint = this._pushOverlayOnScreen(overlayPoint, this._overlayRect, scrollPosition);\n        }\n        // We want to set either `left` or `right` based on whether the overlay wants to appear \"before\"\n        // or \"after\" the origin, which determines the direction in which the element will expand.\n        // For the horizontal axis, the meaning of \"before\" and \"after\" change based on whether the\n        // page is in RTL or LTR.\n        let horizontalStyleProperty;\n        if (this._isRtl()) {\n            horizontalStyleProperty = position.overlayX === 'end' ? 'left' : 'right';\n        }\n        else {\n            horizontalStyleProperty = position.overlayX === 'end' ? 'right' : 'left';\n        }\n        // When we're setting `right`, we adjust the x position such that it is the distance\n        // from the right edge of the viewport rather than the left edge.\n        if (horizontalStyleProperty === 'right') {\n            const documentWidth = this._document.documentElement.clientWidth;\n            styles.right = `${documentWidth - (overlayPoint.x + this._overlayRect.width)}px`;\n        }\n        else {\n            styles.left = coerceCssPixelValue(overlayPoint.x);\n        }\n        return styles;\n    }\n    /**\n     * Gets the view properties of the trigger and overlay, including whether they are clipped\n     * or completely outside the view of any of the strategy's scrollables.\n     */\n    _getScrollVisibility() {\n        // Note: needs fresh rects since the position could've changed.\n        const originBounds = this._getOriginRect();\n        const overlayBounds = this._pane.getBoundingClientRect();\n        // TODO(jelbourn): instead of needing all of the client rects for these scrolling containers\n        // every time, we should be able to use the scrollTop of the containers if the size of those\n        // containers hasn't changed.\n        const scrollContainerBounds = this._scrollables.map(scrollable => {\n            return scrollable.getElementRef().nativeElement.getBoundingClientRect();\n        });\n        return {\n            isOriginClipped: isElementClippedByScrolling(originBounds, scrollContainerBounds),\n            isOriginOutsideView: isElementScrolledOutsideView(originBounds, scrollContainerBounds),\n            isOverlayClipped: isElementClippedByScrolling(overlayBounds, scrollContainerBounds),\n            isOverlayOutsideView: isElementScrolledOutsideView(overlayBounds, scrollContainerBounds),\n        };\n    }\n    /** Subtracts the amount that an element is overflowing on an axis from its length. */\n    _subtractOverflows(length, ...overflows) {\n        return overflows.reduce((currentValue, currentOverflow) => {\n            return currentValue - Math.max(currentOverflow, 0);\n        }, length);\n    }\n    /** Narrows the given viewport rect by the current _viewportMargin. */\n    _getNarrowedViewportRect() {\n        // We recalculate the viewport rect here ourselves, rather than using the ViewportRuler,\n        // because we want to use the `clientWidth` and `clientHeight` as the base. The difference\n        // being that the client properties don't include the scrollbar, as opposed to `innerWidth`\n        // and `innerHeight` that do. This is necessary, because the overlay container uses\n        // 100% `width` and `height` which don't include the scrollbar either.\n        const width = this._document.documentElement.clientWidth;\n        const height = this._document.documentElement.clientHeight;\n        const scrollPosition = this._viewportRuler.getViewportScrollPosition();\n        return {\n            top: scrollPosition.top + this._viewportMargin,\n            left: scrollPosition.left + this._viewportMargin,\n            right: scrollPosition.left + width - this._viewportMargin,\n            bottom: scrollPosition.top + height - this._viewportMargin,\n            width: width - 2 * this._viewportMargin,\n            height: height - 2 * this._viewportMargin,\n        };\n    }\n    /** Whether the we're dealing with an RTL context */\n    _isRtl() {\n        return this._overlayRef.getDirection() === 'rtl';\n    }\n    /** Determines whether the overlay uses exact or flexible positioning. */\n    _hasExactPosition() {\n        return !this._hasFlexibleDimensions || this._isPushed;\n    }\n    /** Retrieves the offset of a position along the x or y axis. */\n    _getOffset(position, axis) {\n        if (axis === 'x') {\n            // We don't do something like `position['offset' + axis]` in\n            // order to avoid breking minifiers that rename properties.\n            return position.offsetX == null ? this._offsetX : position.offsetX;\n        }\n        return position.offsetY == null ? this._offsetY : position.offsetY;\n    }\n    /** Validates that the current position match the expected values. */\n    _validatePositions() {\n        if (typeof ngDevMode === 'undefined' || ngDevMode) {\n            if (!this._preferredPositions.length) {\n                throw Error('FlexibleConnectedPositionStrategy: At least one position is required.');\n            }\n            // TODO(crisbeto): remove these once Angular's template type\n            // checking is advanced enough to catch these cases.\n            this._preferredPositions.forEach(pair => {\n                validateHorizontalPosition('originX', pair.originX);\n                validateVerticalPosition('originY', pair.originY);\n                validateHorizontalPosition('overlayX', pair.overlayX);\n                validateVerticalPosition('overlayY', pair.overlayY);\n            });\n        }\n    }\n    /** Adds a single CSS class or an array of classes on the overlay panel. */\n    _addPanelClasses(cssClasses) {\n        if (this._pane) {\n            coerceArray(cssClasses).forEach(cssClass => {\n                if (cssClass !== '' && this._appliedPanelClasses.indexOf(cssClass) === -1) {\n                    this._appliedPanelClasses.push(cssClass);\n                    this._pane.classList.add(cssClass);\n                }\n            });\n        }\n    }\n    /** Clears the classes that the position strategy has applied from the overlay panel. */\n    _clearPanelClasses() {\n        if (this._pane) {\n            this._appliedPanelClasses.forEach(cssClass => {\n                this._pane.classList.remove(cssClass);\n            });\n            this._appliedPanelClasses = [];\n        }\n    }\n    /** Returns the ClientRect of the current origin. */\n    _getOriginRect() {\n        const origin = this._origin;\n        if (origin instanceof ElementRef) {\n            return origin.nativeElement.getBoundingClientRect();\n        }\n        // Check for Element so SVG elements are also supported.\n        if (origin instanceof Element) {\n            return origin.getBoundingClientRect();\n        }\n        const width = origin.width || 0;\n        const height = origin.height || 0;\n        // If the origin is a point, return a client rect as if it was a 0x0 element at the point.\n        return {\n            top: origin.y,\n            bottom: origin.y + height,\n            left: origin.x,\n            right: origin.x + width,\n            height,\n            width,\n        };\n    }\n}\n/** Shallow-extends a stylesheet object with another stylesheet object. */\nfunction extendStyles(destination, source) {\n    for (let key in source) {\n        if (source.hasOwnProperty(key)) {\n            destination[key] = source[key];\n        }\n    }\n    return destination;\n}\n/**\n * Extracts the pixel value as a number from a value, if it's a number\n * or a CSS pixel string (e.g. `1337px`). Otherwise returns null.\n */\nfunction getPixelValue(input) {\n    if (typeof input !== 'number' && input != null) {\n        const [value, units] = input.split(cssUnitPattern);\n        return !units || units === 'px' ? parseFloat(value) : null;\n    }\n    return input || null;\n}\n/**\n * Gets a version of an element's bounding `ClientRect` where all the values are rounded down to\n * the nearest pixel. This allows us to account for the cases where there may be sub-pixel\n * deviations in the `ClientRect` returned by the browser (e.g. when zoomed in with a percentage\n * size, see #21350).\n */\nfunction getRoundedBoundingClientRect(clientRect) {\n    return {\n        top: Math.floor(clientRect.top),\n        right: Math.floor(clientRect.right),\n        bottom: Math.floor(clientRect.bottom),\n        left: Math.floor(clientRect.left),\n        width: Math.floor(clientRect.width),\n        height: Math.floor(clientRect.height),\n    };\n}\n\n/**\n * @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/** Class to be added to the overlay pane wrapper. */\nconst wrapperClass = 'cdk-global-overlay-wrapper';\n/**\n * A strategy for positioning overlays. Using this strategy, an overlay is given an\n * explicit position relative to the browser's viewport. We use flexbox, instead of\n * transforms, in order to avoid issues with subpixel rendering which can cause the\n * element to become blurry.\n */\nclass GlobalPositionStrategy {\n    constructor() {\n        this._cssPosition = 'static';\n        this._topOffset = '';\n        this._bottomOffset = '';\n        this._leftOffset = '';\n        this._rightOffset = '';\n        this._alignItems = '';\n        this._justifyContent = '';\n        this._width = '';\n        this._height = '';\n    }\n    attach(overlayRef) {\n        const config = overlayRef.getConfig();\n        this._overlayRef = overlayRef;\n        if (this._width && !config.width) {\n            overlayRef.updateSize({ width: this._width });\n        }\n        if (this._height && !config.height) {\n            overlayRef.updateSize({ height: this._height });\n        }\n        overlayRef.hostElement.classList.add(wrapperClass);\n        this._isDisposed = false;\n    }\n    /**\n     * Sets the top position of the overlay. Clears any previously set vertical position.\n     * @param value New top offset.\n     */\n    top(value = '') {\n        this._bottomOffset = '';\n        this._topOffset = value;\n        this._alignItems = 'flex-start';\n        return this;\n    }\n    /**\n     * Sets the left position of the overlay. Clears any previously set horizontal position.\n     * @param value New left offset.\n     */\n    left(value = '') {\n        this._rightOffset = '';\n        this._leftOffset = value;\n        this._justifyContent = 'flex-start';\n        return this;\n    }\n    /**\n     * Sets the bottom position of the overlay. Clears any previously set vertical position.\n     * @param value New bottom offset.\n     */\n    bottom(value = '') {\n        this._topOffset = '';\n        this._bottomOffset = value;\n        this._alignItems = 'flex-end';\n        return this;\n    }\n    /**\n     * Sets the right position of the overlay. Clears any previously set horizontal position.\n     * @param value New right offset.\n     */\n    right(value = '') {\n        this._leftOffset = '';\n        this._rightOffset = value;\n        this._justifyContent = 'flex-end';\n        return this;\n    }\n    /**\n     * Sets the overlay width and clears any previously set width.\n     * @param value New width for the overlay\n     * @deprecated Pass the `width` through the `OverlayConfig`.\n     * @breaking-change 8.0.0\n     */\n    width(value = '') {\n        if (this._overlayRef) {\n            this._overlayRef.updateSize({ width: value });\n        }\n        else {\n            this._width = value;\n        }\n        return this;\n    }\n    /**\n     * Sets the overlay height and clears any previously set height.\n     * @param value New height for the overlay\n     * @deprecated Pass the `height` through the `OverlayConfig`.\n     * @breaking-change 8.0.0\n     */\n    height(value = '') {\n        if (this._overlayRef) {\n            this._overlayRef.updateSize({ height: value });\n        }\n        else {\n            this._height = value;\n        }\n        return this;\n    }\n    /**\n     * Centers the overlay horizontally with an optional offset.\n     * Clears any previously set horizontal position.\n     *\n     * @param offset Overlay offset from the horizontal center.\n     */\n    centerHorizontally(offset = '') {\n        this.left(offset);\n        this._justifyContent = 'center';\n        return this;\n    }\n    /**\n     * Centers the overlay vertically with an optional offset.\n     * Clears any previously set vertical position.\n     *\n     * @param offset Overlay offset from the vertical center.\n     */\n    centerVertically(offset = '') {\n        this.top(offset);\n        this._alignItems = 'center';\n        return this;\n    }\n    /**\n     * Apply the position to the element.\n     * @docs-private\n     */\n    apply() {\n        // Since the overlay ref applies the strategy asynchronously, it could\n        // have been disposed before it ends up being applied. If that is the\n        // case, we shouldn't do anything.\n        if (!this._overlayRef || !this._overlayRef.hasAttached()) {\n            return;\n        }\n        const styles = this._overlayRef.overlayElement.style;\n        const parentStyles = this._overlayRef.hostElement.style;\n        const config = this._overlayRef.getConfig();\n        const { width, height, maxWidth, maxHeight } = config;\n        const shouldBeFlushHorizontally = (width === '100%' || width === '100vw') &&\n            (!maxWidth || maxWidth === '100%' || maxWidth === '100vw');\n        const shouldBeFlushVertically = (height === '100%' || height === '100vh') &&\n            (!maxHeight || maxHeight === '100%' || maxHeight === '100vh');\n        styles.position = this._cssPosition;\n        styles.marginLeft = shouldBeFlushHorizontally ? '0' : this._leftOffset;\n        styles.marginTop = shouldBeFlushVertically ? '0' : this._topOffset;\n        styles.marginBottom = this._bottomOffset;\n        styles.marginRight = this._rightOffset;\n        if (shouldBeFlushHorizontally) {\n            parentStyles.justifyContent = 'flex-start';\n        }\n        else if (this._justifyContent === 'center') {\n            parentStyles.justifyContent = 'center';\n        }\n        else if (this._overlayRef.getConfig().direction === 'rtl') {\n            // In RTL the browser will invert `flex-start` and `flex-end` automatically, but we\n            // don't want that because our positioning is explicitly `left` and `right`, hence\n            // why we do another inversion to ensure that the overlay stays in the same position.\n            // TODO: reconsider this if we add `start` and `end` methods.\n            if (this._justifyContent === 'flex-start') {\n                parentStyles.justifyContent = 'flex-end';\n            }\n            else if (this._justifyContent === 'flex-end') {\n                parentStyles.justifyContent = 'flex-start';\n            }\n        }\n        else {\n            parentStyles.justifyContent = this._justifyContent;\n        }\n        parentStyles.alignItems = shouldBeFlushVertically ? 'flex-start' : this._alignItems;\n    }\n    /**\n     * Cleans up the DOM changes from the position strategy.\n     * @docs-private\n     */\n    dispose() {\n        if (this._isDisposed || !this._overlayRef) {\n            return;\n        }\n        const styles = this._overlayRef.overlayElement.style;\n        const parent = this._overlayRef.hostElement;\n        const parentStyles = parent.style;\n        parent.classList.remove(wrapperClass);\n        parentStyles.justifyContent =\n            parentStyles.alignItems =\n                styles.marginTop =\n                    styles.marginBottom =\n                        styles.marginLeft =\n                            styles.marginRight =\n                                styles.position =\n                                    '';\n        this._overlayRef = null;\n        this._isDisposed = true;\n    }\n}\n\n/** Builder for overlay position strategy. */\nclass OverlayPositionBuilder {\n    constructor(_viewportRuler, _document, _platform, _overlayContainer) {\n        this._viewportRuler = _viewportRuler;\n        this._document = _document;\n        this._platform = _platform;\n        this._overlayContainer = _overlayContainer;\n    }\n    /**\n     * Creates a global position strategy.\n     */\n    global() {\n        return new GlobalPositionStrategy();\n    }\n    /**\n     * Creates a flexible position strategy.\n     * @param origin Origin relative to which to position the overlay.\n     */\n    flexibleConnectedTo(origin) {\n        return new FlexibleConnectedPositionStrategy(origin, this._viewportRuler, this._document, this._platform, this._overlayContainer);\n    }\n}\nOverlayPositionBuilder.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayPositionBuilder, deps: [{ token: i1.ViewportRuler }, { token: DOCUMENT }, { token: i1$1.Platform }, { token: OverlayContainer }], target: i0.ɵɵFactoryTarget.Injectable });\nOverlayPositionBuilder.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayPositionBuilder, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayPositionBuilder, decorators: [{\n            type: Injectable,\n            args: [{ providedIn: 'root' }]\n        }], ctorParameters: function () {\n        return [{ type: i1.ViewportRuler }, { type: undefined, decorators: [{\n                        type: Inject,\n                        args: [DOCUMENT]\n                    }] }, { type: i1$1.Platform }, { type: OverlayContainer }];\n    } });\n\n/**\n * @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/**\n * Service for dispatching events that land on the body to appropriate overlay ref,\n * if any. It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\nclass BaseOverlayDispatcher {\n    constructor(document) {\n        /** Currently attached overlays in the order they were attached. */\n        this._attachedOverlays = [];\n        this._document = document;\n    }\n    ngOnDestroy() {\n        this.detach();\n    }\n    /** Add a new overlay to the list of attached overlay refs. */\n    add(overlayRef) {\n        // Ensure that we don't get the same overlay multiple times.\n        this.remove(overlayRef);\n        this._attachedOverlays.push(overlayRef);\n    }\n    /** Remove an overlay from the list of attached overlay refs. */\n    remove(overlayRef) {\n        const index = this._attachedOverlays.indexOf(overlayRef);\n        if (index > -1) {\n            this._attachedOverlays.splice(index, 1);\n        }\n        // Remove the global listener once there are no more overlays.\n        if (this._attachedOverlays.length === 0) {\n            this.detach();\n        }\n    }\n}\nBaseOverlayDispatcher.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: BaseOverlayDispatcher, deps: [{ token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });\nBaseOverlayDispatcher.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: BaseOverlayDispatcher, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: BaseOverlayDispatcher, decorators: [{\n            type: Injectable,\n            args: [{ providedIn: 'root' }]\n        }], ctorParameters: function () {\n        return [{ type: undefined, decorators: [{\n                        type: Inject,\n                        args: [DOCUMENT]\n                    }] }];\n    } });\n\n/**\n * @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/**\n * Service for dispatching keyboard events that land on the body to appropriate overlay ref,\n * if any. It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\nclass OverlayKeyboardDispatcher extends BaseOverlayDispatcher {\n    constructor(document) {\n        super(document);\n        /** Keyboard event listener that will be attached to the body. */\n        this._keydownListener = (event) => {\n            const overlays = this._attachedOverlays;\n            for (let i = overlays.length - 1; i > -1; i--) {\n                // Dispatch the keydown event to the top overlay which has subscribers to its keydown events.\n                // We want to target the most recent overlay, rather than trying to match where the event came\n                // from, because some components might open an overlay, but keep focus on a trigger element\n                // (e.g. for select and autocomplete). We skip overlays without keydown event subscriptions,\n                // because we don't want overlays that don't handle keyboard events to block the ones below\n                // them that do.\n                if (overlays[i]._keydownEvents.observers.length > 0) {\n                    overlays[i]._keydownEvents.next(event);\n                    break;\n                }\n            }\n        };\n    }\n    /** Add a new overlay to the list of attached overlay refs. */\n    add(overlayRef) {\n        super.add(overlayRef);\n        // Lazily start dispatcher once first overlay is added\n        if (!this._isAttached) {\n            this._document.body.addEventListener('keydown', this._keydownListener);\n            this._isAttached = true;\n        }\n    }\n    /** Detaches the global keyboard event listener. */\n    detach() {\n        if (this._isAttached) {\n            this._document.body.removeEventListener('keydown', this._keydownListener);\n            this._isAttached = false;\n        }\n    }\n}\nOverlayKeyboardDispatcher.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayKeyboardDispatcher, deps: [{ token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });\nOverlayKeyboardDispatcher.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayKeyboardDispatcher, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayKeyboardDispatcher, decorators: [{\n            type: Injectable,\n            args: [{ providedIn: 'root' }]\n        }], ctorParameters: function () {\n        return [{ type: undefined, decorators: [{\n                        type: Inject,\n                        args: [DOCUMENT]\n                    }] }];\n    } });\n\n/**\n * @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/**\n * Service for dispatching mouse click events that land on the body to appropriate overlay ref,\n * if any. It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\nclass OverlayOutsideClickDispatcher extends BaseOverlayDispatcher {\n    constructor(document, _platform) {\n        super(document);\n        this._platform = _platform;\n        this._cursorStyleIsSet = false;\n        /** Store pointerdown event target to track origin of click. */\n        this._pointerDownListener = (event) => {\n            this._pointerDownEventTarget = _getEventTarget(event);\n        };\n        /** Click event listener that will be attached to the body propagate phase. */\n        this._clickListener = (event) => {\n            const target = _getEventTarget(event);\n            // In case of a click event, we want to check the origin of the click\n            // (e.g. in case where a user starts a click inside the overlay and\n            // releases the click outside of it).\n            // This is done by using the event target of the preceding pointerdown event.\n            // Every click event caused by a pointer device has a preceding pointerdown\n            // event, unless the click was programmatically triggered (e.g. in a unit test).\n            const origin = event.type === 'click' && this._pointerDownEventTarget\n                ? this._pointerDownEventTarget : target;\n            // Reset the stored pointerdown event target, to avoid having it interfere\n            // in subsequent events.\n            this._pointerDownEventTarget = null;\n            // We copy the array because the original may be modified asynchronously if the\n            // outsidePointerEvents listener decides to detach overlays resulting in index errors inside\n            // the for loop.\n            const overlays = this._attachedOverlays.slice();\n            // Dispatch the mouse event to the top overlay which has subscribers to its mouse events.\n            // We want to target all overlays for which the click could be considered as outside click.\n            // As soon as we reach an overlay for which the click is not outside click we break off\n            // the loop.\n            for (let i = overlays.length - 1; i > -1; i--) {\n                const overlayRef = overlays[i];\n                if (overlayRef._outsidePointerEvents.observers.length < 1 || !overlayRef.hasAttached()) {\n                    continue;\n                }\n                // If it's a click inside the overlay, just break - we should do nothing\n                // If it's an outside click (both origin and target of the click) dispatch the mouse event,\n                // and proceed with the next overlay\n                if (overlayRef.overlayElement.contains(target) ||\n                    overlayRef.overlayElement.contains(origin)) {\n                    break;\n                }\n                overlayRef._outsidePointerEvents.next(event);\n            }\n        };\n    }\n    /** Add a new overlay to the list of attached overlay refs. */\n    add(overlayRef) {\n        super.add(overlayRef);\n        // Safari on iOS does not generate click events for non-interactive\n        // elements. However, we want to receive a click for any element outside\n        // the overlay. We can force a \"clickable\" state by setting\n        // `cursor: pointer` on the document body. See:\n        // https://developer.mozilla.org/en-US/docs/Web/API/Element/click_event#Safari_Mobile\n        // https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html\n        if (!this._isAttached) {\n            const body = this._document.body;\n            body.addEventListener('pointerdown', this._pointerDownListener, true);\n            body.addEventListener('click', this._clickListener, true);\n            body.addEventListener('auxclick', this._clickListener, true);\n            body.addEventListener('contextmenu', this._clickListener, true);\n            // click event is not fired on iOS. To make element \"clickable\" we are\n            // setting the cursor to pointer\n            if (this._platform.IOS && !this._cursorStyleIsSet) {\n                this._cursorOriginalValue = body.style.cursor;\n                body.style.cursor = 'pointer';\n                this._cursorStyleIsSet = true;\n            }\n            this._isAttached = true;\n        }\n    }\n    /** Detaches the global keyboard event listener. */\n    detach() {\n        if (this._isAttached) {\n            const body = this._document.body;\n            body.removeEventListener('pointerdown', this._pointerDownListener, true);\n            body.removeEventListener('click', this._clickListener, true);\n            body.removeEventListener('auxclick', this._clickListener, true);\n            body.removeEventListener('contextmenu', this._clickListener, true);\n            if (this._platform.IOS && this._cursorStyleIsSet) {\n                body.style.cursor = this._cursorOriginalValue;\n                this._cursorStyleIsSet = false;\n            }\n            this._isAttached = false;\n        }\n    }\n}\nOverlayOutsideClickDispatcher.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayOutsideClickDispatcher, deps: [{ token: DOCUMENT }, { token: i1$1.Platform }], target: i0.ɵɵFactoryTarget.Injectable });\nOverlayOutsideClickDispatcher.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayOutsideClickDispatcher, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayOutsideClickDispatcher, decorators: [{\n            type: Injectable,\n            args: [{ providedIn: 'root' }]\n        }], ctorParameters: function () {\n        return [{ type: undefined, decorators: [{\n                        type: Inject,\n                        args: [DOCUMENT]\n                    }] }, { type: i1$1.Platform }];\n    } });\n\n/** Next overlay unique ID. */\nlet nextUniqueId = 0;\n// Note that Overlay is *not* scoped to the app root because of the ComponentFactoryResolver\n// which needs to be different depending on where OverlayModule is imported.\n/**\n * Service to create Overlays. Overlays are dynamically added pieces of floating UI, meant to be\n * used as a low-level building block for other components. Dialogs, tooltips, menus,\n * selects, etc. can all be built using overlays. The service should primarily be used by authors\n * of re-usable components rather than developers building end-user applications.\n *\n * An overlay *is* a PortalOutlet, so any kind of Portal can be loaded into one.\n */\nclass Overlay {\n    constructor(\n    /** Scrolling strategies that can be used when creating an overlay. */\n    scrollStrategies, _overlayContainer, _componentFactoryResolver, _positionBuilder, _keyboardDispatcher, _injector, _ngZone, _document, _directionality, _location, _outsideClickDispatcher) {\n        this.scrollStrategies = scrollStrategies;\n        this._overlayContainer = _overlayContainer;\n        this._componentFactoryResolver = _componentFactoryResolver;\n        this._positionBuilder = _positionBuilder;\n        this._keyboardDispatcher = _keyboardDispatcher;\n        this._injector = _injector;\n        this._ngZone = _ngZone;\n        this._document = _document;\n        this._directionality = _directionality;\n        this._location = _location;\n        this._outsideClickDispatcher = _outsideClickDispatcher;\n    }\n    /**\n     * Creates an overlay.\n     * @param config Configuration applied to the overlay.\n     * @returns Reference to the created overlay.\n     */\n    create(config) {\n        const host = this._createHostElement();\n        const pane = this._createPaneElement(host);\n        const portalOutlet = this._createPortalOutlet(pane);\n        const overlayConfig = new OverlayConfig(config);\n        overlayConfig.direction = overlayConfig.direction || this._directionality.value;\n        return new OverlayRef(portalOutlet, host, pane, overlayConfig, this._ngZone, this._keyboardDispatcher, this._document, this._location, this._outsideClickDispatcher);\n    }\n    /**\n     * Gets a position builder that can be used, via fluent API,\n     * to construct and configure a position strategy.\n     * @returns An overlay position builder.\n     */\n    position() {\n        return this._positionBuilder;\n    }\n    /**\n     * Creates the DOM element for an overlay and appends it to the overlay container.\n     * @returns Newly-created pane element\n     */\n    _createPaneElement(host) {\n        const pane = this._document.createElement('div');\n        pane.id = `cdk-overlay-${nextUniqueId++}`;\n        pane.classList.add('cdk-overlay-pane');\n        host.appendChild(pane);\n        return pane;\n    }\n    /**\n     * Creates the host element that wraps around an overlay\n     * and can be used for advanced positioning.\n     * @returns Newly-create host element.\n     */\n    _createHostElement() {\n        const host = this._document.createElement('div');\n        this._overlayContainer.getContainerElement().appendChild(host);\n        return host;\n    }\n    /**\n     * Create a DomPortalOutlet into which the overlay content can be loaded.\n     * @param pane The DOM element to turn into a portal outlet.\n     * @returns A portal outlet for the given DOM element.\n     */\n    _createPortalOutlet(pane) {\n        // We have to resolve the ApplicationRef later in order to allow people\n        // to use overlay-based providers during app initialization.\n        if (!this._appRef) {\n            this._appRef = this._injector.get(ApplicationRef);\n        }\n        return new DomPortalOutlet(pane, this._componentFactoryResolver, this._appRef, this._injector, this._document);\n    }\n}\nOverlay.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: Overlay, deps: [{ token: ScrollStrategyOptions }, { token: OverlayContainer }, { token: i0.ComponentFactoryResolver }, { token: OverlayPositionBuilder }, { token: OverlayKeyboardDispatcher }, { token: i0.Injector }, { token: i0.NgZone }, { token: DOCUMENT }, { token: i5.Directionality }, { token: i6.Location }, { token: OverlayOutsideClickDispatcher }], target: i0.ɵɵFactoryTarget.Injectable });\nOverlay.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: Overlay });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: Overlay, decorators: [{\n            type: Injectable\n        }], ctorParameters: function () {\n        return [{ type: ScrollStrategyOptions }, { type: OverlayContainer }, { type: i0.ComponentFactoryResolver }, { type: OverlayPositionBuilder }, { type: OverlayKeyboardDispatcher }, { type: i0.Injector }, { type: i0.NgZone }, { type: undefined, decorators: [{\n                        type: Inject,\n                        args: [DOCUMENT]\n                    }] }, { type: i5.Directionality }, { type: i6.Location }, { type: OverlayOutsideClickDispatcher }];\n    } });\n\n/** Default set of positions for the overlay. Follows the behavior of a dropdown. */\nconst defaultPositionList = [\n    {\n        originX: 'start',\n        originY: 'bottom',\n        overlayX: 'start',\n        overlayY: 'top',\n    },\n    {\n        originX: 'start',\n        originY: 'top',\n        overlayX: 'start',\n        overlayY: 'bottom',\n    },\n    {\n        originX: 'end',\n        originY: 'top',\n        overlayX: 'end',\n        overlayY: 'bottom',\n    },\n    {\n        originX: 'end',\n        originY: 'bottom',\n        overlayX: 'end',\n        overlayY: 'top',\n    },\n];\n/** Injection token that determines the scroll handling while the connected overlay is open. */\nconst CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY = new InjectionToken('cdk-connected-overlay-scroll-strategy');\n/**\n * Directive applied to an element to make it usable as an origin for an Overlay using a\n * ConnectedPositionStrategy.\n */\nclass CdkOverlayOrigin {\n    constructor(\n    /** Reference to the element on which the directive is applied. */\n    elementRef) {\n        this.elementRef = elementRef;\n    }\n}\nCdkOverlayOrigin.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: CdkOverlayOrigin, deps: [{ token: i0.ElementRef }], target: i0.ɵɵFactoryTarget.Directive });\nCdkOverlayOrigin.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.1\", type: CdkOverlayOrigin, selector: \"[cdk-overlay-origin], [overlay-origin], [cdkOverlayOrigin]\", exportAs: [\"cdkOverlayOrigin\"], ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: CdkOverlayOrigin, decorators: [{\n            type: Directive,\n            args: [{\n                    selector: '[cdk-overlay-origin], [overlay-origin], [cdkOverlayOrigin]',\n                    exportAs: 'cdkOverlayOrigin',\n                }]\n        }], ctorParameters: function () { return [{ type: i0.ElementRef }]; } });\n/**\n * Directive to facilitate declarative creation of an\n * Overlay using a FlexibleConnectedPositionStrategy.\n */\nclass CdkConnectedOverlay {\n    // TODO(jelbourn): inputs for size, scroll behavior, animation, etc.\n    constructor(_overlay, templateRef, viewContainerRef, scrollStrategyFactory, _dir) {\n        this._overlay = _overlay;\n        this._dir = _dir;\n        this._hasBackdrop = false;\n        this._lockPosition = false;\n        this._growAfterOpen = false;\n        this._flexibleDimensions = false;\n        this._push = false;\n        this._backdropSubscription = Subscription.EMPTY;\n        this._attachSubscription = Subscription.EMPTY;\n        this._detachSubscription = Subscription.EMPTY;\n        this._positionSubscription = Subscription.EMPTY;\n        /** Margin between the overlay and the viewport edges. */\n        this.viewportMargin = 0;\n        /** Whether the overlay is open. */\n        this.open = false;\n        /** Whether the overlay can be closed by user interaction. */\n        this.disableClose = false;\n        /** Event emitted when the backdrop is clicked. */\n        this.backdropClick = new EventEmitter();\n        /** Event emitted when the position has changed. */\n        this.positionChange = new EventEmitter();\n        /** Event emitted when the overlay has been attached. */\n        this.attach = new EventEmitter();\n        /** Event emitted when the overlay has been detached. */\n        this.detach = new EventEmitter();\n        /** Emits when there are keyboard events that are targeted at the overlay. */\n        this.overlayKeydown = new EventEmitter();\n        /** Emits when there are mouse outside click events that are targeted at the overlay. */\n        this.overlayOutsideClick = new EventEmitter();\n        this._templatePortal = new TemplatePortal(templateRef, viewContainerRef);\n        this._scrollStrategyFactory = scrollStrategyFactory;\n        this.scrollStrategy = this._scrollStrategyFactory();\n    }\n    /** The offset in pixels for the overlay connection point on the x-axis */\n    get offsetX() {\n        return this._offsetX;\n    }\n    set offsetX(offsetX) {\n        this._offsetX = offsetX;\n        if (this._position) {\n            this._updatePositionStrategy(this._position);\n        }\n    }\n    /** The offset in pixels for the overlay connection point on the y-axis */\n    get offsetY() {\n        return this._offsetY;\n    }\n    set offsetY(offsetY) {\n        this._offsetY = offsetY;\n        if (this._position) {\n            this._updatePositionStrategy(this._position);\n        }\n    }\n    /** Whether or not the overlay should attach a backdrop. */\n    get hasBackdrop() {\n        return this._hasBackdrop;\n    }\n    set hasBackdrop(value) {\n        this._hasBackdrop = coerceBooleanProperty(value);\n    }\n    /** Whether or not the overlay should be locked when scrolling. */\n    get lockPosition() {\n        return this._lockPosition;\n    }\n    set lockPosition(value) {\n        this._lockPosition = coerceBooleanProperty(value);\n    }\n    /** Whether the overlay's width and height can be constrained to fit within the viewport. */\n    get flexibleDimensions() {\n        return this._flexibleDimensions;\n    }\n    set flexibleDimensions(value) {\n        this._flexibleDimensions = coerceBooleanProperty(value);\n    }\n    /** Whether the overlay can grow after the initial open when flexible positioning is turned on. */\n    get growAfterOpen() {\n        return this._growAfterOpen;\n    }\n    set growAfterOpen(value) {\n        this._growAfterOpen = coerceBooleanProperty(value);\n    }\n    /** Whether the overlay can be pushed on-screen if none of the provided positions fit. */\n    get push() {\n        return this._push;\n    }\n    set push(value) {\n        this._push = coerceBooleanProperty(value);\n    }\n    /** The associated overlay reference. */\n    get overlayRef() {\n        return this._overlayRef;\n    }\n    /** The element's layout direction. */\n    get dir() {\n        return this._dir ? this._dir.value : 'ltr';\n    }\n    ngOnDestroy() {\n        this._attachSubscription.unsubscribe();\n        this._detachSubscription.unsubscribe();\n        this._backdropSubscription.unsubscribe();\n        this._positionSubscription.unsubscribe();\n        if (this._overlayRef) {\n            this._overlayRef.dispose();\n        }\n    }\n    ngOnChanges(changes) {\n        if (this._position) {\n            this._updatePositionStrategy(this._position);\n            this._overlayRef.updateSize({\n                width: this.width,\n                minWidth: this.minWidth,\n                height: this.height,\n                minHeight: this.minHeight,\n            });\n            if (changes['origin'] && this.open) {\n                this._position.apply();\n            }\n        }\n        if (changes['open']) {\n            this.open ? this._attachOverlay() : this._detachOverlay();\n        }\n    }\n    /** Creates an overlay */\n    _createOverlay() {\n        if (!this.positions || !this.positions.length) {\n            this.positions = defaultPositionList;\n        }\n        const overlayRef = (this._overlayRef = this._overlay.create(this._buildConfig()));\n        this._attachSubscription = overlayRef.attachments().subscribe(() => this.attach.emit());\n        this._detachSubscription = overlayRef.detachments().subscribe(() => this.detach.emit());\n        overlayRef.keydownEvents().subscribe((event) => {\n            this.overlayKeydown.next(event);\n            if (event.keyCode === ESCAPE && !this.disableClose && !hasModifierKey(event)) {\n                event.preventDefault();\n                this._detachOverlay();\n            }\n        });\n        this._overlayRef.outsidePointerEvents().subscribe((event) => {\n            this.overlayOutsideClick.next(event);\n        });\n    }\n    /** Builds the overlay config based on the directive's inputs */\n    _buildConfig() {\n        const positionStrategy = (this._position =\n            this.positionStrategy || this._createPositionStrategy());\n        const overlayConfig = new OverlayConfig({\n            direction: this._dir,\n            positionStrategy,\n            scrollStrategy: this.scrollStrategy,\n            hasBackdrop: this.hasBackdrop,\n        });\n        if (this.width || this.width === 0) {\n            overlayConfig.width = this.width;\n        }\n        if (this.height || this.height === 0) {\n            overlayConfig.height = this.height;\n        }\n        if (this.minWidth || this.minWidth === 0) {\n            overlayConfig.minWidth = this.minWidth;\n        }\n        if (this.minHeight || this.minHeight === 0) {\n            overlayConfig.minHeight = this.minHeight;\n        }\n        if (this.backdropClass) {\n            overlayConfig.backdropClass = this.backdropClass;\n        }\n        if (this.panelClass) {\n            overlayConfig.panelClass = this.panelClass;\n        }\n        return overlayConfig;\n    }\n    /** Updates the state of a position strategy, based on the values of the directive inputs. */\n    _updatePositionStrategy(positionStrategy) {\n        const positions = this.positions.map(currentPosition => ({\n            originX: currentPosition.originX,\n            originY: currentPosition.originY,\n            overlayX: currentPosition.overlayX,\n            overlayY: currentPosition.overlayY,\n            offsetX: currentPosition.offsetX || this.offsetX,\n            offsetY: currentPosition.offsetY || this.offsetY,\n            panelClass: currentPosition.panelClass || undefined,\n        }));\n        return positionStrategy\n            .setOrigin(this._getFlexibleConnectedPositionStrategyOrigin())\n            .withPositions(positions)\n            .withFlexibleDimensions(this.flexibleDimensions)\n            .withPush(this.push)\n            .withGrowAfterOpen(this.growAfterOpen)\n            .withViewportMargin(this.viewportMargin)\n            .withLockedPosition(this.lockPosition)\n            .withTransformOriginOn(this.transformOriginSelector);\n    }\n    /** Returns the position strategy of the overlay to be set on the overlay config */\n    _createPositionStrategy() {\n        const strategy = this._overlay\n            .position()\n            .flexibleConnectedTo(this._getFlexibleConnectedPositionStrategyOrigin());\n        this._updatePositionStrategy(strategy);\n        return strategy;\n    }\n    _getFlexibleConnectedPositionStrategyOrigin() {\n        if (this.origin instanceof CdkOverlayOrigin) {\n            return this.origin.elementRef;\n        }\n        else {\n            return this.origin;\n        }\n    }\n    /** Attaches the overlay and subscribes to backdrop clicks if backdrop exists */\n    _attachOverlay() {\n        if (!this._overlayRef) {\n            this._createOverlay();\n        }\n        else {\n            // Update the overlay size, in case the directive's inputs have changed\n            this._overlayRef.getConfig().hasBackdrop = this.hasBackdrop;\n        }\n        if (!this._overlayRef.hasAttached()) {\n            this._overlayRef.attach(this._templatePortal);\n        }\n        if (this.hasBackdrop) {\n            this._backdropSubscription = this._overlayRef.backdropClick().subscribe(event => {\n                this.backdropClick.emit(event);\n            });\n        }\n        else {\n            this._backdropSubscription.unsubscribe();\n        }\n        this._positionSubscription.unsubscribe();\n        // Only subscribe to `positionChanges` if requested, because putting\n        // together all the information for it can be expensive.\n        if (this.positionChange.observers.length > 0) {\n            this._positionSubscription = this._position.positionChanges\n                .pipe(takeWhile(() => this.positionChange.observers.length > 0))\n                .subscribe(position => {\n                this.positionChange.emit(position);\n                if (this.positionChange.observers.length === 0) {\n                    this._positionSubscription.unsubscribe();\n                }\n            });\n        }\n    }\n    /** Detaches the overlay and unsubscribes to backdrop clicks if backdrop exists */\n    _detachOverlay() {\n        if (this._overlayRef) {\n            this._overlayRef.detach();\n        }\n        this._backdropSubscription.unsubscribe();\n        this._positionSubscription.unsubscribe();\n    }\n}\nCdkConnectedOverlay.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: CdkConnectedOverlay, deps: [{ token: Overlay }, { token: i0.TemplateRef }, { token: i0.ViewContainerRef }, { token: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY }, { token: i5.Directionality, optional: true }], target: i0.ɵɵFactoryTarget.Directive });\nCdkConnectedOverlay.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.1\", type: CdkConnectedOverlay, selector: \"[cdk-connected-overlay], [connected-overlay], [cdkConnectedOverlay]\", inputs: { origin: [\"cdkConnectedOverlayOrigin\", \"origin\"], positions: [\"cdkConnectedOverlayPositions\", \"positions\"], positionStrategy: [\"cdkConnectedOverlayPositionStrategy\", \"positionStrategy\"], offsetX: [\"cdkConnectedOverlayOffsetX\", \"offsetX\"], offsetY: [\"cdkConnectedOverlayOffsetY\", \"offsetY\"], width: [\"cdkConnectedOverlayWidth\", \"width\"], height: [\"cdkConnectedOverlayHeight\", \"height\"], minWidth: [\"cdkConnectedOverlayMinWidth\", \"minWidth\"], minHeight: [\"cdkConnectedOverlayMinHeight\", \"minHeight\"], backdropClass: [\"cdkConnectedOverlayBackdropClass\", \"backdropClass\"], panelClass: [\"cdkConnectedOverlayPanelClass\", \"panelClass\"], viewportMargin: [\"cdkConnectedOverlayViewportMargin\", \"viewportMargin\"], scrollStrategy: [\"cdkConnectedOverlayScrollStrategy\", \"scrollStrategy\"], open: [\"cdkConnectedOverlayOpen\", \"open\"], disableClose: [\"cdkConnectedOverlayDisableClose\", \"disableClose\"], transformOriginSelector: [\"cdkConnectedOverlayTransformOriginOn\", \"transformOriginSelector\"], hasBackdrop: [\"cdkConnectedOverlayHasBackdrop\", \"hasBackdrop\"], lockPosition: [\"cdkConnectedOverlayLockPosition\", \"lockPosition\"], flexibleDimensions: [\"cdkConnectedOverlayFlexibleDimensions\", \"flexibleDimensions\"], growAfterOpen: [\"cdkConnectedOverlayGrowAfterOpen\", \"growAfterOpen\"], push: [\"cdkConnectedOverlayPush\", \"push\"] }, outputs: { backdropClick: \"backdropClick\", positionChange: \"positionChange\", attach: \"attach\", detach: \"detach\", overlayKeydown: \"overlayKeydown\", overlayOutsideClick: \"overlayOutsideClick\" }, exportAs: [\"cdkConnectedOverlay\"], usesOnChanges: true, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: CdkConnectedOverlay, decorators: [{\n            type: Directive,\n            args: [{\n                    selector: '[cdk-connected-overlay], [connected-overlay], [cdkConnectedOverlay]',\n                    exportAs: 'cdkConnectedOverlay',\n                }]\n        }], ctorParameters: function () {\n        return [{ type: Overlay }, { type: i0.TemplateRef }, { type: i0.ViewContainerRef }, { type: undefined, decorators: [{\n                        type: Inject,\n                        args: [CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY]\n                    }] }, { type: i5.Directionality, decorators: [{\n                        type: Optional\n                    }] }];\n    }, propDecorators: { origin: [{\n                type: Input,\n                args: ['cdkConnectedOverlayOrigin']\n            }], positions: [{\n                type: Input,\n                args: ['cdkConnectedOverlayPositions']\n            }], positionStrategy: [{\n                type: Input,\n                args: ['cdkConnectedOverlayPositionStrategy']\n            }], offsetX: [{\n                type: Input,\n                args: ['cdkConnectedOverlayOffsetX']\n            }], offsetY: [{\n                type: Input,\n                args: ['cdkConnectedOverlayOffsetY']\n            }], width: [{\n                type: Input,\n                args: ['cdkConnectedOverlayWidth']\n            }], height: [{\n                type: Input,\n                args: ['cdkConnectedOverlayHeight']\n            }], minWidth: [{\n                type: Input,\n                args: ['cdkConnectedOverlayMinWidth']\n            }], minHeight: [{\n                type: Input,\n                args: ['cdkConnectedOverlayMinHeight']\n            }], backdropClass: [{\n                type: Input,\n                args: ['cdkConnectedOverlayBackdropClass']\n            }], panelClass: [{\n                type: Input,\n                args: ['cdkConnectedOverlayPanelClass']\n            }], viewportMargin: [{\n                type: Input,\n                args: ['cdkConnectedOverlayViewportMargin']\n            }], scrollStrategy: [{\n                type: Input,\n                args: ['cdkConnectedOverlayScrollStrategy']\n            }], open: [{\n                type: Input,\n                args: ['cdkConnectedOverlayOpen']\n            }], disableClose: [{\n                type: Input,\n                args: ['cdkConnectedOverlayDisableClose']\n            }], transformOriginSelector: [{\n                type: Input,\n                args: ['cdkConnectedOverlayTransformOriginOn']\n            }], hasBackdrop: [{\n                type: Input,\n                args: ['cdkConnectedOverlayHasBackdrop']\n            }], lockPosition: [{\n                type: Input,\n                args: ['cdkConnectedOverlayLockPosition']\n            }], flexibleDimensions: [{\n                type: Input,\n                args: ['cdkConnectedOverlayFlexibleDimensions']\n            }], growAfterOpen: [{\n                type: Input,\n                args: ['cdkConnectedOverlayGrowAfterOpen']\n            }], push: [{\n                type: Input,\n                args: ['cdkConnectedOverlayPush']\n            }], backdropClick: [{\n                type: Output\n            }], positionChange: [{\n                type: Output\n            }], attach: [{\n                type: Output\n            }], detach: [{\n                type: Output\n            }], overlayKeydown: [{\n                type: Output\n            }], overlayOutsideClick: [{\n                type: Output\n            }] } });\n/** @docs-private */\nfunction CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay) {\n    return () => overlay.scrollStrategies.reposition();\n}\n/** @docs-private */\nconst CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER = {\n    provide: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY,\n    deps: [Overlay],\n    useFactory: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY,\n};\n\n/**\n * @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 */\nclass OverlayModule {\n}\nOverlayModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nOverlayModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayModule, declarations: [CdkConnectedOverlay, CdkOverlayOrigin], imports: [BidiModule, PortalModule, ScrollingModule], exports: [CdkConnectedOverlay, CdkOverlayOrigin, ScrollingModule] });\nOverlayModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayModule, providers: [Overlay, CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER], imports: [[BidiModule, PortalModule, ScrollingModule], ScrollingModule] });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: OverlayModule, decorators: [{\n            type: NgModule,\n            args: [{\n                    imports: [BidiModule, PortalModule, ScrollingModule],\n                    exports: [CdkConnectedOverlay, CdkOverlayOrigin, ScrollingModule],\n                    declarations: [CdkConnectedOverlay, CdkOverlayOrigin],\n                    providers: [Overlay, CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER],\n                }]\n        }] });\n\n/**\n * @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\n/**\n * @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/**\n * Alternative to OverlayContainer that supports correct displaying of overlay elements in\n * Fullscreen mode\n * https://developer.mozilla.org/en-US/docs/Web/API/Element/requestFullScreen\n *\n * Should be provided in the root component.\n */\nclass FullscreenOverlayContainer extends OverlayContainer {\n    constructor(_document, platform) {\n        super(_document, platform);\n    }\n    ngOnDestroy() {\n        super.ngOnDestroy();\n        if (this._fullScreenEventName && this._fullScreenListener) {\n            this._document.removeEventListener(this._fullScreenEventName, this._fullScreenListener);\n        }\n    }\n    _createContainer() {\n        super._createContainer();\n        this._adjustParentForFullscreenChange();\n        this._addFullscreenChangeListener(() => this._adjustParentForFullscreenChange());\n    }\n    _adjustParentForFullscreenChange() {\n        if (!this._containerElement) {\n            return;\n        }\n        const fullscreenElement = this.getFullscreenElement();\n        const parent = fullscreenElement || this._document.body;\n        parent.appendChild(this._containerElement);\n    }\n    _addFullscreenChangeListener(fn) {\n        const eventName = this._getEventName();\n        if (eventName) {\n            if (this._fullScreenListener) {\n                this._document.removeEventListener(eventName, this._fullScreenListener);\n            }\n            this._document.addEventListener(eventName, fn);\n            this._fullScreenListener = fn;\n        }\n    }\n    _getEventName() {\n        if (!this._fullScreenEventName) {\n            const _document = this._document;\n            if (_document.fullscreenEnabled) {\n                this._fullScreenEventName = 'fullscreenchange';\n            }\n            else if (_document.webkitFullscreenEnabled) {\n                this._fullScreenEventName = 'webkitfullscreenchange';\n            }\n            else if (_document.mozFullScreenEnabled) {\n                this._fullScreenEventName = 'mozfullscreenchange';\n            }\n            else if (_document.msFullscreenEnabled) {\n                this._fullScreenEventName = 'MSFullscreenChange';\n            }\n        }\n        return this._fullScreenEventName;\n    }\n    /**\n     * When the page is put into fullscreen mode, a specific element is specified.\n     * Only that element and its children are visible when in fullscreen mode.\n     */\n    getFullscreenElement() {\n        const _document = this._document;\n        return (_document.fullscreenElement ||\n            _document.webkitFullscreenElement ||\n            _document.mozFullScreenElement ||\n            _document.msFullscreenElement ||\n            null);\n    }\n}\nFullscreenOverlayContainer.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: FullscreenOverlayContainer, deps: [{ token: DOCUMENT }, { token: i1$1.Platform }], target: i0.ɵɵFactoryTarget.Injectable });\nFullscreenOverlayContainer.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: FullscreenOverlayContainer, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: FullscreenOverlayContainer, decorators: [{\n            type: Injectable,\n            args: [{ providedIn: 'root' }]\n        }], ctorParameters: function () {\n        return [{ type: undefined, decorators: [{\n                        type: Inject,\n                        args: [DOCUMENT]\n                    }] }, { type: i1$1.Platform }];\n    } });\n\n/**\n * @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\n/**\n * @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\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { BlockScrollStrategy, CdkConnectedOverlay, CdkOverlayOrigin, CloseScrollStrategy, ConnectedOverlayPositionChange, ConnectionPositionPair, FlexibleConnectedPositionStrategy, FullscreenOverlayContainer, GlobalPositionStrategy, NoopScrollStrategy, Overlay, OverlayConfig, OverlayContainer, OverlayKeyboardDispatcher, OverlayModule, OverlayOutsideClickDispatcher, OverlayPositionBuilder, OverlayRef, RepositionScrollStrategy, ScrollStrategyOptions, ScrollingVisibility, validateHorizontalPosition, validateVerticalPosition };\n","import * as i0 from '@angular/core';\nimport { NgModule, Injectable } from '@angular/core';\nimport { coerceArray } from '@angular/cdk/coercion';\nimport { Subject, combineLatest, concat, Observable } from 'rxjs';\nimport { take, skip, debounceTime, map, startWith, takeUntil } from 'rxjs/operators';\nimport * as i1 from '@angular/cdk/platform';\n\n/**\n * @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 */\nclass LayoutModule {\n}\nLayoutModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: LayoutModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nLayoutModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: LayoutModule });\nLayoutModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: LayoutModule });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: LayoutModule, decorators: [{\n            type: NgModule,\n            args: [{}]\n        }] });\n\n/**\n * @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/** Global registry for all dynamically-created, injected media queries. */\nconst mediaQueriesForWebkitCompatibility = new Set();\n/** Style tag that holds all of the dynamically-created media queries. */\nlet mediaQueryStyleNode;\n/** A utility for calling matchMedia queries. */\nclass MediaMatcher {\n    constructor(_platform) {\n        this._platform = _platform;\n        this._matchMedia =\n            this._platform.isBrowser && window.matchMedia\n                ? // matchMedia is bound to the window scope intentionally as it is an illegal invocation to\n                    // call it from a different scope.\n                    window.matchMedia.bind(window)\n                : noopMatchMedia;\n    }\n    /**\n     * Evaluates the given media query and returns the native MediaQueryList from which results\n     * can be retrieved.\n     * Confirms the layout engine will trigger for the selector query provided and returns the\n     * MediaQueryList for the query provided.\n     */\n    matchMedia(query) {\n        if (this._platform.WEBKIT || this._platform.BLINK) {\n            createEmptyStyleRule(query);\n        }\n        return this._matchMedia(query);\n    }\n}\nMediaMatcher.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: MediaMatcher, deps: [{ token: i1.Platform }], target: i0.ɵɵFactoryTarget.Injectable });\nMediaMatcher.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: MediaMatcher, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: MediaMatcher, decorators: [{\n            type: Injectable,\n            args: [{ providedIn: 'root' }]\n        }], ctorParameters: function () { return [{ type: i1.Platform }]; } });\n/**\n * Creates an empty stylesheet that is used to work around browser inconsistencies related to\n * `matchMedia`. At the time of writing, it handles the following cases:\n * 1. On WebKit browsers, a media query has to have at least one rule in order for `matchMedia`\n * to fire. We work around it by declaring a dummy stylesheet with a `@media` declaration.\n * 2. In some cases Blink browsers will stop firing the `matchMedia` listener if none of the rules\n * inside the `@media` match existing elements on the page. We work around it by having one rule\n * targeting the `body`. See https://github.com/angular/components/issues/23546.\n */\nfunction createEmptyStyleRule(query) {\n    if (mediaQueriesForWebkitCompatibility.has(query)) {\n        return;\n    }\n    try {\n        if (!mediaQueryStyleNode) {\n            mediaQueryStyleNode = document.createElement('style');\n            mediaQueryStyleNode.setAttribute('type', 'text/css');\n            document.head.appendChild(mediaQueryStyleNode);\n        }\n        if (mediaQueryStyleNode.sheet) {\n            mediaQueryStyleNode.sheet.insertRule(`@media ${query} {body{ }}`, 0);\n            mediaQueriesForWebkitCompatibility.add(query);\n        }\n    }\n    catch (e) {\n        console.error(e);\n    }\n}\n/** No-op matchMedia replacement for non-browser platforms. */\nfunction noopMatchMedia(query) {\n    // Use `as any` here to avoid adding additional necessary properties for\n    // the noop matcher.\n    return {\n        matches: query === 'all' || query === '',\n        media: query,\n        addListener: () => { },\n        removeListener: () => { },\n    };\n}\n\n/**\n * @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/** Utility for checking the matching state of @media queries. */\nclass BreakpointObserver {\n    constructor(_mediaMatcher, _zone) {\n        this._mediaMatcher = _mediaMatcher;\n        this._zone = _zone;\n        /**  A map of all media queries currently being listened for. */\n        this._queries = new Map();\n        /** A subject for all other observables to takeUntil based on. */\n        this._destroySubject = new Subject();\n    }\n    /** Completes the active subject, signalling to all other observables to complete. */\n    ngOnDestroy() {\n        this._destroySubject.next();\n        this._destroySubject.complete();\n    }\n    /**\n     * Whether one or more media queries match the current viewport size.\n     * @param value One or more media queries to check.\n     * @returns Whether any of the media queries match.\n     */\n    isMatched(value) {\n        const queries = splitQueries(coerceArray(value));\n        return queries.some(mediaQuery => this._registerQuery(mediaQuery).mql.matches);\n    }\n    /**\n     * Gets an observable of results for the given queries that will emit new results for any changes\n     * in matching of the given queries.\n     * @param value One or more media queries to check.\n     * @returns A stream of matches for the given queries.\n     */\n    observe(value) {\n        const queries = splitQueries(coerceArray(value));\n        const observables = queries.map(query => this._registerQuery(query).observable);\n        let stateObservable = combineLatest(observables);\n        // Emit the first state immediately, and then debounce the subsequent emissions.\n        stateObservable = concat(stateObservable.pipe(take(1)), stateObservable.pipe(skip(1), debounceTime(0)));\n        return stateObservable.pipe(map(breakpointStates => {\n            const response = {\n                matches: false,\n                breakpoints: {},\n            };\n            breakpointStates.forEach(({ matches, query }) => {\n                response.matches = response.matches || matches;\n                response.breakpoints[query] = matches;\n            });\n            return response;\n        }));\n    }\n    /** Registers a specific query to be listened for. */\n    _registerQuery(query) {\n        // Only set up a new MediaQueryList if it is not already being listened for.\n        if (this._queries.has(query)) {\n            return this._queries.get(query);\n        }\n        const mql = this._mediaMatcher.matchMedia(query);\n        // Create callback for match changes and add it is as a listener.\n        const queryObservable = new Observable((observer) => {\n            // Listener callback methods are wrapped to be placed back in ngZone. Callbacks must be placed\n            // back into the zone because matchMedia is only included in Zone.js by loading the\n            // webapis-media-query.js file alongside the zone.js file.  Additionally, some browsers do not\n            // have MediaQueryList inherit from EventTarget, which causes inconsistencies in how Zone.js\n            // patches it.\n            const handler = (e) => this._zone.run(() => observer.next(e));\n            mql.addListener(handler);\n            return () => {\n                mql.removeListener(handler);\n            };\n        }).pipe(startWith(mql), map(({ matches }) => ({ query, matches })), takeUntil(this._destroySubject));\n        // Add the MediaQueryList to the set of queries.\n        const output = { observable: queryObservable, mql };\n        this._queries.set(query, output);\n        return output;\n    }\n}\nBreakpointObserver.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: BreakpointObserver, deps: [{ token: MediaMatcher }, { token: i0.NgZone }], target: i0.ɵɵFactoryTarget.Injectable });\nBreakpointObserver.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: BreakpointObserver, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: BreakpointObserver, decorators: [{\n            type: Injectable,\n            args: [{ providedIn: 'root' }]\n        }], ctorParameters: function () { return [{ type: MediaMatcher }, { type: i0.NgZone }]; } });\n/**\n * Split each query string into separate query strings if two queries are provided as comma\n * separated.\n */\nfunction splitQueries(queries) {\n    return queries\n        .map(query => query.split(','))\n        .reduce((a1, a2) => a1.concat(a2))\n        .map(query => query.trim());\n}\n\n/**\n * @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// PascalCase is being used as Breakpoints is used like an enum.\n// tslint:disable-next-line:variable-name\nconst Breakpoints = {\n    XSmall: '(max-width: 599.98px)',\n    Small: '(min-width: 600px) and (max-width: 959.98px)',\n    Medium: '(min-width: 960px) and (max-width: 1279.98px)',\n    Large: '(min-width: 1280px) and (max-width: 1919.98px)',\n    XLarge: '(min-width: 1920px)',\n    Handset: '(max-width: 599.98px) and (orientation: portrait), ' +\n        '(max-width: 959.98px) and (orientation: landscape)',\n    Tablet: '(min-width: 600px) and (max-width: 839.98px) and (orientation: portrait), ' +\n        '(min-width: 960px) and (max-width: 1279.98px) and (orientation: landscape)',\n    Web: '(min-width: 840px) and (orientation: portrait), ' +\n        '(min-width: 1280px) and (orientation: landscape)',\n    HandsetPortrait: '(max-width: 599.98px) and (orientation: portrait)',\n    TabletPortrait: '(min-width: 600px) and (max-width: 839.98px) and (orientation: portrait)',\n    WebPortrait: '(min-width: 840px) and (orientation: portrait)',\n    HandsetLandscape: '(max-width: 959.98px) and (orientation: landscape)',\n    TabletLandscape: '(min-width: 960px) and (max-width: 1279.98px) and (orientation: landscape)',\n    WebLandscape: '(min-width: 1280px) and (orientation: landscape)',\n};\n\n/**\n * @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\n/**\n * @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\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { BreakpointObserver, Breakpoints, LayoutModule, MediaMatcher };\n","import * as i1$1 from '@angular/cdk/overlay';\nimport { OverlayModule, OverlayConfig } from '@angular/cdk/overlay';\nimport * as i3$1 from '@angular/cdk/portal';\nimport { BasePortalOutlet, CdkPortalOutlet, PortalModule, ComponentPortal, TemplatePortal } from '@angular/cdk/portal';\nimport * as i3 from '@angular/common';\nimport { CommonModule } from '@angular/common';\nimport * as i0 from '@angular/core';\nimport { InjectionToken, Component, ViewEncapsulation, ChangeDetectionStrategy, Inject, ViewChild, NgModule, Injector, TemplateRef, Injectable, Optional, SkipSelf } from '@angular/core';\nimport { MatCommonModule } from '@angular/material/core';\nimport * as i2 from '@angular/material/button';\nimport { MatButtonModule } from '@angular/material/button';\nimport { Subject } from 'rxjs';\nimport { take, takeUntil } from 'rxjs/operators';\nimport { trigger, state, style, transition, animate } from '@angular/animations';\nimport * as i1 from '@angular/cdk/platform';\nimport * as i3$2 from '@angular/cdk/layout';\nimport { Breakpoints } from '@angular/cdk/layout';\nimport * as i2$1 from '@angular/cdk/a11y';\n\n/**\n * @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/** Injection token that can be used to access the data that was passed in to a snack bar. */\nconst MAT_SNACK_BAR_DATA = new InjectionToken('MatSnackBarData');\n/**\n * Configuration used when opening a snack-bar.\n */\nclass MatSnackBarConfig {\n    constructor() {\n        /** The politeness level for the MatAriaLiveAnnouncer announcement. */\n        this.politeness = 'assertive';\n        /**\n         * Message to be announced by the LiveAnnouncer. When opening a snackbar without a custom\n         * component or template, the announcement message will default to the specified message.\n         */\n        this.announcementMessage = '';\n        /** The length of time in milliseconds to wait before automatically dismissing the snack bar. */\n        this.duration = 0;\n        /** Data being injected into the child component. */\n        this.data = null;\n        /** The horizontal position to place the snack bar. */\n        this.horizontalPosition = 'center';\n        /** The vertical position to place the snack bar. */\n        this.verticalPosition = 'bottom';\n    }\n}\n\n/**\n * @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/** Maximum amount of milliseconds that can be passed into setTimeout. */\nconst MAX_TIMEOUT = Math.pow(2, 31) - 1;\n/**\n * Reference to a snack bar dispatched from the snack bar service.\n */\nclass MatSnackBarRef {\n    constructor(containerInstance, _overlayRef) {\n        this._overlayRef = _overlayRef;\n        /** Subject for notifying the user that the snack bar has been dismissed. */\n        this._afterDismissed = new Subject();\n        /** Subject for notifying the user that the snack bar has opened and appeared. */\n        this._afterOpened = new Subject();\n        /** Subject for notifying the user that the snack bar action was called. */\n        this._onAction = new Subject();\n        /** Whether the snack bar was dismissed using the action button. */\n        this._dismissedByAction = false;\n        this.containerInstance = containerInstance;\n        // Dismiss snackbar on action.\n        this.onAction().subscribe(() => this.dismiss());\n        containerInstance._onExit.subscribe(() => this._finishDismiss());\n    }\n    /** Dismisses the snack bar. */\n    dismiss() {\n        if (!this._afterDismissed.closed) {\n            this.containerInstance.exit();\n        }\n        clearTimeout(this._durationTimeoutId);\n    }\n    /** Marks the snackbar action clicked. */\n    dismissWithAction() {\n        if (!this._onAction.closed) {\n            this._dismissedByAction = true;\n            this._onAction.next();\n            this._onAction.complete();\n        }\n        clearTimeout(this._durationTimeoutId);\n    }\n    /**\n     * Marks the snackbar action clicked.\n     * @deprecated Use `dismissWithAction` instead.\n     * @breaking-change 8.0.0\n     */\n    closeWithAction() {\n        this.dismissWithAction();\n    }\n    /** Dismisses the snack bar after some duration */\n    _dismissAfter(duration) {\n        // Note that we need to cap the duration to the maximum value for setTimeout, because\n        // it'll revert to 1 if somebody passes in something greater (e.g. `Infinity`). See #17234.\n        this._durationTimeoutId = setTimeout(() => this.dismiss(), Math.min(duration, MAX_TIMEOUT));\n    }\n    /** Marks the snackbar as opened */\n    _open() {\n        if (!this._afterOpened.closed) {\n            this._afterOpened.next();\n            this._afterOpened.complete();\n        }\n    }\n    /** Cleans up the DOM after closing. */\n    _finishDismiss() {\n        this._overlayRef.dispose();\n        if (!this._onAction.closed) {\n            this._onAction.complete();\n        }\n        this._afterDismissed.next({ dismissedByAction: this._dismissedByAction });\n        this._afterDismissed.complete();\n        this._dismissedByAction = false;\n    }\n    /** Gets an observable that is notified when the snack bar is finished closing. */\n    afterDismissed() {\n        return this._afterDismissed;\n    }\n    /** Gets an observable that is notified when the snack bar has opened and appeared. */\n    afterOpened() {\n        return this.containerInstance._onEnter;\n    }\n    /** Gets an observable that is notified when the snack bar action is called. */\n    onAction() {\n        return this._onAction;\n    }\n}\n\n/**\n * @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/**\n * A component used to open as the default snack bar, matching material spec.\n * This should only be used internally by the snack bar service.\n */\nclass SimpleSnackBar {\n    constructor(snackBarRef, data) {\n        this.snackBarRef = snackBarRef;\n        this.data = data;\n    }\n    /** Performs the action on the snack bar. */\n    action() {\n        this.snackBarRef.dismissWithAction();\n    }\n    /** If the action button should be shown. */\n    get hasAction() {\n        return !!this.data.action;\n    }\n}\nSimpleSnackBar.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: SimpleSnackBar, deps: [{ token: MatSnackBarRef }, { token: MAT_SNACK_BAR_DATA }], target: i0.ɵɵFactoryTarget.Component });\nSimpleSnackBar.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: \"12.0.0\", version: \"13.0.1\", type: SimpleSnackBar, selector: \"simple-snack-bar\", host: { classAttribute: \"mat-simple-snackbar\" }, ngImport: i0, template: \"<span>{{data.message}}</span>\\n<div class=\\\"mat-simple-snackbar-action\\\"  *ngIf=\\\"hasAction\\\">\\n  <button mat-button (click)=\\\"action()\\\">{{data.action}}</button>\\n</div>\\n\", styles: [\".mat-simple-snackbar{display:flex;justify-content:space-between;align-items:center;line-height:20px;opacity:1}.mat-simple-snackbar-action{flex-shrink:0;margin:-8px -8px -8px 8px}.mat-simple-snackbar-action button{max-height:36px;min-width:0}[dir=rtl] .mat-simple-snackbar-action{margin-left:-8px;margin-right:8px}\\n\"], components: [{ type: i2.MatButton, selector: \"button[mat-button], button[mat-raised-button], button[mat-icon-button],             button[mat-fab], button[mat-mini-fab], button[mat-stroked-button],             button[mat-flat-button]\", inputs: [\"disabled\", \"disableRipple\", \"color\"], exportAs: [\"matButton\"] }], directives: [{ type: i3.NgIf, selector: \"[ngIf]\", inputs: [\"ngIf\", \"ngIfThen\", \"ngIfElse\"] }], changeDetection: i0.ChangeDetectionStrategy.OnPush, encapsulation: i0.ViewEncapsulation.None });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: SimpleSnackBar, decorators: [{\n            type: Component,\n            args: [{ selector: 'simple-snack-bar', encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush, host: {\n                        'class': 'mat-simple-snackbar',\n                    }, template: \"<span>{{data.message}}</span>\\n<div class=\\\"mat-simple-snackbar-action\\\"  *ngIf=\\\"hasAction\\\">\\n  <button mat-button (click)=\\\"action()\\\">{{data.action}}</button>\\n</div>\\n\", styles: [\".mat-simple-snackbar{display:flex;justify-content:space-between;align-items:center;line-height:20px;opacity:1}.mat-simple-snackbar-action{flex-shrink:0;margin:-8px -8px -8px 8px}.mat-simple-snackbar-action button{max-height:36px;min-width:0}[dir=rtl] .mat-simple-snackbar-action{margin-left:-8px;margin-right:8px}\\n\"] }]\n        }], ctorParameters: function () {\n        return [{ type: MatSnackBarRef }, { type: undefined, decorators: [{\n                        type: Inject,\n                        args: [MAT_SNACK_BAR_DATA]\n                    }] }];\n    } });\n\n/**\n * @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/**\n * Animations used by the Material snack bar.\n * @docs-private\n */\nconst matSnackBarAnimations = {\n    /** Animation that shows and hides a snack bar. */\n    snackBarState: trigger('state', [\n        state('void, hidden', style({\n            transform: 'scale(0.8)',\n            opacity: 0,\n        })),\n        state('visible', style({\n            transform: 'scale(1)',\n            opacity: 1,\n        })),\n        transition('* => visible', animate('150ms cubic-bezier(0, 0, 0.2, 1)')),\n        transition('* => void, * => hidden', animate('75ms cubic-bezier(0.4, 0.0, 1, 1)', style({\n            opacity: 0,\n        }))),\n    ]),\n};\n\n/**\n * Internal component that wraps user-provided snack bar content.\n * @docs-private\n */\nclass MatSnackBarContainer extends BasePortalOutlet {\n    constructor(_ngZone, _elementRef, _changeDetectorRef, _platform, \n    /** The snack bar configuration. */\n    snackBarConfig) {\n        super();\n        this._ngZone = _ngZone;\n        this._elementRef = _elementRef;\n        this._changeDetectorRef = _changeDetectorRef;\n        this._platform = _platform;\n        this.snackBarConfig = snackBarConfig;\n        /** The number of milliseconds to wait before announcing the snack bar's content. */\n        this._announceDelay = 150;\n        /** Whether the component has been destroyed. */\n        this._destroyed = false;\n        /** Subject for notifying that the snack bar has announced to screen readers. */\n        this._onAnnounce = new Subject();\n        /** Subject for notifying that the snack bar has exited from view. */\n        this._onExit = new Subject();\n        /** Subject for notifying that the snack bar has finished entering the view. */\n        this._onEnter = new Subject();\n        /** The state of the snack bar animations. */\n        this._animationState = 'void';\n        /**\n         * Attaches a DOM portal to the snack bar container.\n         * @deprecated To be turned into a method.\n         * @breaking-change 10.0.0\n         */\n        this.attachDomPortal = (portal) => {\n            this._assertNotAttached();\n            this._applySnackBarClasses();\n            return this._portalOutlet.attachDomPortal(portal);\n        };\n        // Use aria-live rather than a live role like 'alert' or 'status'\n        // because NVDA and JAWS have show inconsistent behavior with live roles.\n        if (snackBarConfig.politeness === 'assertive' && !snackBarConfig.announcementMessage) {\n            this._live = 'assertive';\n        }\n        else if (snackBarConfig.politeness === 'off') {\n            this._live = 'off';\n        }\n        else {\n            this._live = 'polite';\n        }\n        // Only set role for Firefox. Set role based on aria-live because setting role=\"alert\" implies\n        // aria-live=\"assertive\" which may cause issues if aria-live is set to \"polite\" above.\n        if (this._platform.FIREFOX) {\n            if (this._live === 'polite') {\n                this._role = 'status';\n            }\n            if (this._live === 'assertive') {\n                this._role = 'alert';\n            }\n        }\n    }\n    /** Attach a component portal as content to this snack bar container. */\n    attachComponentPortal(portal) {\n        this._assertNotAttached();\n        this._applySnackBarClasses();\n        return this._portalOutlet.attachComponentPortal(portal);\n    }\n    /** Attach a template portal as content to this snack bar container. */\n    attachTemplatePortal(portal) {\n        this._assertNotAttached();\n        this._applySnackBarClasses();\n        return this._portalOutlet.attachTemplatePortal(portal);\n    }\n    /** Handle end of animations, updating the state of the snackbar. */\n    onAnimationEnd(event) {\n        const { fromState, toState } = event;\n        if ((toState === 'void' && fromState !== 'void') || toState === 'hidden') {\n            this._completeExit();\n        }\n        if (toState === 'visible') {\n            // Note: we shouldn't use `this` inside the zone callback,\n            // because it can cause a memory leak.\n            const onEnter = this._onEnter;\n            this._ngZone.run(() => {\n                onEnter.next();\n                onEnter.complete();\n            });\n        }\n    }\n    /** Begin animation of snack bar entrance into view. */\n    enter() {\n        if (!this._destroyed) {\n            this._animationState = 'visible';\n            this._changeDetectorRef.detectChanges();\n            this._screenReaderAnnounce();\n        }\n    }\n    /** Begin animation of the snack bar exiting from view. */\n    exit() {\n        // Note: this one transitions to `hidden`, rather than `void`, in order to handle the case\n        // where multiple snack bars are opened in quick succession (e.g. two consecutive calls to\n        // `MatSnackBar.open`).\n        this._animationState = 'hidden';\n        // Mark this element with an 'exit' attribute to indicate that the snackbar has\n        // been dismissed and will soon be removed from the DOM. This is used by the snackbar\n        // test harness.\n        this._elementRef.nativeElement.setAttribute('mat-exit', '');\n        // If the snack bar hasn't been announced by the time it exits it wouldn't have been open\n        // long enough to visually read it either, so clear the timeout for announcing.\n        clearTimeout(this._announceTimeoutId);\n        return this._onExit;\n    }\n    /** Makes sure the exit callbacks have been invoked when the element is destroyed. */\n    ngOnDestroy() {\n        this._destroyed = true;\n        this._completeExit();\n    }\n    /**\n     * Waits for the zone to settle before removing the element. Helps prevent\n     * errors where we end up removing an element which is in the middle of an animation.\n     */\n    _completeExit() {\n        this._ngZone.onMicrotaskEmpty.pipe(take(1)).subscribe(() => {\n            this._onExit.next();\n            this._onExit.complete();\n        });\n    }\n    /** Applies the various positioning and user-configured CSS classes to the snack bar. */\n    _applySnackBarClasses() {\n        const element = this._elementRef.nativeElement;\n        const panelClasses = this.snackBarConfig.panelClass;\n        if (panelClasses) {\n            if (Array.isArray(panelClasses)) {\n                // Note that we can't use a spread here, because IE doesn't support multiple arguments.\n                panelClasses.forEach(cssClass => element.classList.add(cssClass));\n            }\n            else {\n                element.classList.add(panelClasses);\n            }\n        }\n        if (this.snackBarConfig.horizontalPosition === 'center') {\n            element.classList.add('mat-snack-bar-center');\n        }\n        if (this.snackBarConfig.verticalPosition === 'top') {\n            element.classList.add('mat-snack-bar-top');\n        }\n    }\n    /** Asserts that no content is already attached to the container. */\n    _assertNotAttached() {\n        if (this._portalOutlet.hasAttached() && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n            throw Error('Attempting to attach snack bar content after content is already attached');\n        }\n    }\n    /**\n     * Starts a timeout to move the snack bar content to the live region so screen readers will\n     * announce it.\n     */\n    _screenReaderAnnounce() {\n        if (!this._announceTimeoutId) {\n            this._ngZone.runOutsideAngular(() => {\n                this._announceTimeoutId = setTimeout(() => {\n                    const inertElement = this._elementRef.nativeElement.querySelector('[aria-hidden]');\n                    const liveElement = this._elementRef.nativeElement.querySelector('[aria-live]');\n                    if (inertElement && liveElement) {\n                        // If an element in the snack bar content is focused before being moved\n                        // track it and restore focus after moving to the live region.\n                        let focusedElement = null;\n                        if (this._platform.isBrowser &&\n                            document.activeElement instanceof HTMLElement &&\n                            inertElement.contains(document.activeElement)) {\n                            focusedElement = document.activeElement;\n                        }\n                        inertElement.removeAttribute('aria-hidden');\n                        liveElement.appendChild(inertElement);\n                        focusedElement === null || focusedElement === void 0 ? void 0 : focusedElement.focus();\n                        this._onAnnounce.next();\n                        this._onAnnounce.complete();\n                    }\n                }, this._announceDelay);\n            });\n        }\n    }\n}\nMatSnackBarContainer.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: MatSnackBarContainer, deps: [{ token: i0.NgZone }, { token: i0.ElementRef }, { token: i0.ChangeDetectorRef }, { token: i1.Platform }, { token: MatSnackBarConfig }], target: i0.ɵɵFactoryTarget.Component });\nMatSnackBarContainer.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: \"12.0.0\", version: \"13.0.1\", type: MatSnackBarContainer, selector: \"snack-bar-container\", host: { listeners: { \"@state.done\": \"onAnimationEnd($event)\" }, properties: { \"@state\": \"_animationState\" }, classAttribute: \"mat-snack-bar-container\" }, viewQueries: [{ propertyName: \"_portalOutlet\", first: true, predicate: CdkPortalOutlet, descendants: true, static: true }], usesInheritance: true, ngImport: i0, template: \"<!-- Initially holds the snack bar content, will be empty after announcing to screen readers. -->\\n<div aria-hidden=\\\"true\\\">\\n  <ng-template cdkPortalOutlet></ng-template>\\n</div>\\n\\n<!-- Will receive the snack bar content from the non-live div, move will happen a short delay after opening -->\\n<div [attr.aria-live]=\\\"_live\\\" [attr.role]=\\\"_role\\\"></div>\\n\", styles: [\".mat-snack-bar-container{border-radius:4px;box-sizing:border-box;display:block;margin:24px;max-width:33vw;min-width:344px;padding:14px 16px;min-height:48px;transform-origin:center}.cdk-high-contrast-active .mat-snack-bar-container{border:solid 1px}.mat-snack-bar-handset{width:100%}.mat-snack-bar-handset .mat-snack-bar-container{margin:8px;max-width:100%;min-width:0;width:100%}\\n\"], directives: [{ type: i3$1.CdkPortalOutlet, selector: \"[cdkPortalOutlet]\", inputs: [\"cdkPortalOutlet\"], outputs: [\"attached\"], exportAs: [\"cdkPortalOutlet\"] }], animations: [matSnackBarAnimations.snackBarState], changeDetection: i0.ChangeDetectionStrategy.Default, encapsulation: i0.ViewEncapsulation.None });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: MatSnackBarContainer, decorators: [{\n            type: Component,\n            args: [{ selector: 'snack-bar-container', changeDetection: ChangeDetectionStrategy.Default, encapsulation: ViewEncapsulation.None, animations: [matSnackBarAnimations.snackBarState], host: {\n                        'class': 'mat-snack-bar-container',\n                        '[@state]': '_animationState',\n                        '(@state.done)': 'onAnimationEnd($event)',\n                    }, template: \"<!-- Initially holds the snack bar content, will be empty after announcing to screen readers. -->\\n<div aria-hidden=\\\"true\\\">\\n  <ng-template cdkPortalOutlet></ng-template>\\n</div>\\n\\n<!-- Will receive the snack bar content from the non-live div, move will happen a short delay after opening -->\\n<div [attr.aria-live]=\\\"_live\\\" [attr.role]=\\\"_role\\\"></div>\\n\", styles: [\".mat-snack-bar-container{border-radius:4px;box-sizing:border-box;display:block;margin:24px;max-width:33vw;min-width:344px;padding:14px 16px;min-height:48px;transform-origin:center}.cdk-high-contrast-active .mat-snack-bar-container{border:solid 1px}.mat-snack-bar-handset{width:100%}.mat-snack-bar-handset .mat-snack-bar-container{margin:8px;max-width:100%;min-width:0;width:100%}\\n\"] }]\n        }], ctorParameters: function () { return [{ type: i0.NgZone }, { type: i0.ElementRef }, { type: i0.ChangeDetectorRef }, { type: i1.Platform }, { type: MatSnackBarConfig }]; }, propDecorators: { _portalOutlet: [{\n                type: ViewChild,\n                args: [CdkPortalOutlet, { static: true }]\n            }] } });\n\n/**\n * @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 */\nclass MatSnackBarModule {\n}\nMatSnackBarModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: MatSnackBarModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nMatSnackBarModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: MatSnackBarModule, declarations: [MatSnackBarContainer, SimpleSnackBar], imports: [OverlayModule, PortalModule, CommonModule, MatButtonModule, MatCommonModule], exports: [MatSnackBarContainer, MatCommonModule] });\nMatSnackBarModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: MatSnackBarModule, imports: [[OverlayModule, PortalModule, CommonModule, MatButtonModule, MatCommonModule], MatCommonModule] });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: MatSnackBarModule, decorators: [{\n            type: NgModule,\n            args: [{\n                    imports: [OverlayModule, PortalModule, CommonModule, MatButtonModule, MatCommonModule],\n                    exports: [MatSnackBarContainer, MatCommonModule],\n                    declarations: [MatSnackBarContainer, SimpleSnackBar],\n                }]\n        }] });\n\n/** Injection token that can be used to specify default snack bar. */\nconst MAT_SNACK_BAR_DEFAULT_OPTIONS = new InjectionToken('mat-snack-bar-default-options', {\n    providedIn: 'root',\n    factory: MAT_SNACK_BAR_DEFAULT_OPTIONS_FACTORY,\n});\n/** @docs-private */\nfunction MAT_SNACK_BAR_DEFAULT_OPTIONS_FACTORY() {\n    return new MatSnackBarConfig();\n}\n/**\n * Service to dispatch Material Design snack bar messages.\n */\nclass MatSnackBar {\n    constructor(_overlay, _live, _injector, _breakpointObserver, _parentSnackBar, _defaultConfig) {\n        this._overlay = _overlay;\n        this._live = _live;\n        this._injector = _injector;\n        this._breakpointObserver = _breakpointObserver;\n        this._parentSnackBar = _parentSnackBar;\n        this._defaultConfig = _defaultConfig;\n        /**\n         * Reference to the current snack bar in the view *at this level* (in the Angular injector tree).\n         * If there is a parent snack-bar service, all operations should delegate to that parent\n         * via `_openedSnackBarRef`.\n         */\n        this._snackBarRefAtThisLevel = null;\n        /** The component that should be rendered as the snack bar's simple component. */\n        this.simpleSnackBarComponent = SimpleSnackBar;\n        /** The container component that attaches the provided template or component. */\n        this.snackBarContainerComponent = MatSnackBarContainer;\n        /** The CSS class to apply for handset mode. */\n        this.handsetCssClass = 'mat-snack-bar-handset';\n    }\n    /** Reference to the currently opened snackbar at *any* level. */\n    get _openedSnackBarRef() {\n        const parent = this._parentSnackBar;\n        return parent ? parent._openedSnackBarRef : this._snackBarRefAtThisLevel;\n    }\n    set _openedSnackBarRef(value) {\n        if (this._parentSnackBar) {\n            this._parentSnackBar._openedSnackBarRef = value;\n        }\n        else {\n            this._snackBarRefAtThisLevel = value;\n        }\n    }\n    /**\n     * Creates and dispatches a snack bar with a custom component for the content, removing any\n     * currently opened snack bars.\n     *\n     * @param component Component to be instantiated.\n     * @param config Extra configuration for the snack bar.\n     */\n    openFromComponent(component, config) {\n        return this._attach(component, config);\n    }\n    /**\n     * Creates and dispatches a snack bar with a custom template for the content, removing any\n     * currently opened snack bars.\n     *\n     * @param template Template to be instantiated.\n     * @param config Extra configuration for the snack bar.\n     */\n    openFromTemplate(template, config) {\n        return this._attach(template, config);\n    }\n    /**\n     * Opens a snackbar with a message and an optional action.\n     * @param message The message to show in the snackbar.\n     * @param action The label for the snackbar action.\n     * @param config Additional configuration options for the snackbar.\n     */\n    open(message, action = '', config) {\n        const _config = Object.assign(Object.assign({}, this._defaultConfig), config);\n        // Since the user doesn't have access to the component, we can\n        // override the data to pass in our own message and action.\n        _config.data = { message, action };\n        // Since the snack bar has `role=\"alert\"`, we don't\n        // want to announce the same message twice.\n        if (_config.announcementMessage === message) {\n            _config.announcementMessage = undefined;\n        }\n        return this.openFromComponent(this.simpleSnackBarComponent, _config);\n    }\n    /**\n     * Dismisses the currently-visible snack bar.\n     */\n    dismiss() {\n        if (this._openedSnackBarRef) {\n            this._openedSnackBarRef.dismiss();\n        }\n    }\n    ngOnDestroy() {\n        // Only dismiss the snack bar at the current level on destroy.\n        if (this._snackBarRefAtThisLevel) {\n            this._snackBarRefAtThisLevel.dismiss();\n        }\n    }\n    /**\n     * Attaches the snack bar container component to the overlay.\n     */\n    _attachSnackBarContainer(overlayRef, config) {\n        const userInjector = config && config.viewContainerRef && config.viewContainerRef.injector;\n        const injector = Injector.create({\n            parent: userInjector || this._injector,\n            providers: [{ provide: MatSnackBarConfig, useValue: config }],\n        });\n        const containerPortal = new ComponentPortal(this.snackBarContainerComponent, config.viewContainerRef, injector);\n        const containerRef = overlayRef.attach(containerPortal);\n        containerRef.instance.snackBarConfig = config;\n        return containerRef.instance;\n    }\n    /**\n     * Places a new component or a template as the content of the snack bar container.\n     */\n    _attach(content, userConfig) {\n        const config = Object.assign(Object.assign(Object.assign({}, new MatSnackBarConfig()), this._defaultConfig), userConfig);\n        const overlayRef = this._createOverlay(config);\n        const container = this._attachSnackBarContainer(overlayRef, config);\n        const snackBarRef = new MatSnackBarRef(container, overlayRef);\n        if (content instanceof TemplateRef) {\n            const portal = new TemplatePortal(content, null, {\n                $implicit: config.data,\n                snackBarRef,\n            });\n            snackBarRef.instance = container.attachTemplatePortal(portal);\n        }\n        else {\n            const injector = this._createInjector(config, snackBarRef);\n            const portal = new ComponentPortal(content, undefined, injector);\n            const contentRef = container.attachComponentPortal(portal);\n            // We can't pass this via the injector, because the injector is created earlier.\n            snackBarRef.instance = contentRef.instance;\n        }\n        // Subscribe to the breakpoint observer and attach the mat-snack-bar-handset class as\n        // appropriate. This class is applied to the overlay element because the overlay must expand to\n        // fill the width of the screen for full width snackbars.\n        this._breakpointObserver\n            .observe(Breakpoints.HandsetPortrait)\n            .pipe(takeUntil(overlayRef.detachments()))\n            .subscribe(state => {\n            overlayRef.overlayElement.classList.toggle(this.handsetCssClass, state.matches);\n        });\n        if (config.announcementMessage) {\n            // Wait until the snack bar contents have been announced then deliver this message.\n            container._onAnnounce.subscribe(() => {\n                this._live.announce(config.announcementMessage, config.politeness);\n            });\n        }\n        this._animateSnackBar(snackBarRef, config);\n        this._openedSnackBarRef = snackBarRef;\n        return this._openedSnackBarRef;\n    }\n    /** Animates the old snack bar out and the new one in. */\n    _animateSnackBar(snackBarRef, config) {\n        // When the snackbar is dismissed, clear the reference to it.\n        snackBarRef.afterDismissed().subscribe(() => {\n            // Clear the snackbar ref if it hasn't already been replaced by a newer snackbar.\n            if (this._openedSnackBarRef == snackBarRef) {\n                this._openedSnackBarRef = null;\n            }\n            if (config.announcementMessage) {\n                this._live.clear();\n            }\n        });\n        if (this._openedSnackBarRef) {\n            // If a snack bar is already in view, dismiss it and enter the\n            // new snack bar after exit animation is complete.\n            this._openedSnackBarRef.afterDismissed().subscribe(() => {\n                snackBarRef.containerInstance.enter();\n            });\n            this._openedSnackBarRef.dismiss();\n        }\n        else {\n            // If no snack bar is in view, enter the new snack bar.\n            snackBarRef.containerInstance.enter();\n        }\n        // If a dismiss timeout is provided, set up dismiss based on after the snackbar is opened.\n        if (config.duration && config.duration > 0) {\n            snackBarRef.afterOpened().subscribe(() => snackBarRef._dismissAfter(config.duration));\n        }\n    }\n    /**\n     * Creates a new overlay and places it in the correct location.\n     * @param config The user-specified snack bar config.\n     */\n    _createOverlay(config) {\n        const overlayConfig = new OverlayConfig();\n        overlayConfig.direction = config.direction;\n        let positionStrategy = this._overlay.position().global();\n        // Set horizontal position.\n        const isRtl = config.direction === 'rtl';\n        const isLeft = config.horizontalPosition === 'left' ||\n            (config.horizontalPosition === 'start' && !isRtl) ||\n            (config.horizontalPosition === 'end' && isRtl);\n        const isRight = !isLeft && config.horizontalPosition !== 'center';\n        if (isLeft) {\n            positionStrategy.left('0');\n        }\n        else if (isRight) {\n            positionStrategy.right('0');\n        }\n        else {\n            positionStrategy.centerHorizontally();\n        }\n        // Set horizontal position.\n        if (config.verticalPosition === 'top') {\n            positionStrategy.top('0');\n        }\n        else {\n            positionStrategy.bottom('0');\n        }\n        overlayConfig.positionStrategy = positionStrategy;\n        return this._overlay.create(overlayConfig);\n    }\n    /**\n     * Creates an injector to be used inside of a snack bar component.\n     * @param config Config that was used to create the snack bar.\n     * @param snackBarRef Reference to the snack bar.\n     */\n    _createInjector(config, snackBarRef) {\n        const userInjector = config && config.viewContainerRef && config.viewContainerRef.injector;\n        return Injector.create({\n            parent: userInjector || this._injector,\n            providers: [\n                { provide: MatSnackBarRef, useValue: snackBarRef },\n                { provide: MAT_SNACK_BAR_DATA, useValue: config.data },\n            ],\n        });\n    }\n}\nMatSnackBar.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: MatSnackBar, deps: [{ token: i1$1.Overlay }, { token: i2$1.LiveAnnouncer }, { token: i0.Injector }, { token: i3$2.BreakpointObserver }, { token: MatSnackBar, optional: true, skipSelf: true }, { token: MAT_SNACK_BAR_DEFAULT_OPTIONS }], target: i0.ɵɵFactoryTarget.Injectable });\nMatSnackBar.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: MatSnackBar, providedIn: MatSnackBarModule });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.1\", ngImport: i0, type: MatSnackBar, decorators: [{\n            type: Injectable,\n            args: [{ providedIn: MatSnackBarModule }]\n        }], ctorParameters: function () {\n        return [{ type: i1$1.Overlay }, { type: i2$1.LiveAnnouncer }, { type: i0.Injector }, { type: i3$2.BreakpointObserver }, { type: MatSnackBar, decorators: [{\n                        type: Optional\n                    }, {\n                        type: SkipSelf\n                    }] }, { type: MatSnackBarConfig, decorators: [{\n                        type: Inject,\n                        args: [MAT_SNACK_BAR_DEFAULT_OPTIONS]\n                    }] }];\n    } });\n\n/**\n * @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\n/**\n * @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\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { MAT_SNACK_BAR_DATA, MAT_SNACK_BAR_DEFAULT_OPTIONS, MAT_SNACK_BAR_DEFAULT_OPTIONS_FACTORY, MatSnackBar, MatSnackBarConfig, MatSnackBarContainer, MatSnackBarModule, MatSnackBarRef, SimpleSnackBar, matSnackBarAnimations };\n"],"sourceRoot":"webpack:///","file":"default-src_app_custom-elements_code_code_component_ts-src_app_custom-elements_code_code_module_ts.17b1801e510bb50a.js"}