{"version":3,"sources":["node_modules/@angular/cdk/fesm2022/coercion.mjs","node_modules/@angular/cdk/fesm2022/platform.mjs","node_modules/@angular/cdk/fesm2022/bidi.mjs","node_modules/@angular/cdk/fesm2022/collections.mjs","node_modules/@angular/cdk/fesm2022/scrolling.mjs","node_modules/@angular/cdk/fesm2022/portal.mjs","node_modules/@angular/cdk/fesm2022/keycodes.mjs","node_modules/@angular/cdk/fesm2022/overlay.mjs","node_modules/@angular/cdk/fesm2022/observers.mjs","node_modules/@angular/cdk/fesm2022/layout.mjs","node_modules/@angular/cdk/fesm2022/a11y.mjs","node_modules/@angular/animations/fesm2022/animations.mjs","node_modules/@angular/animations/fesm2022/browser.mjs","node_modules/@angular/platform-browser/fesm2022/animations.mjs","node_modules/@angular/cdk/fesm2022/dialog.mjs","node_modules/@angular/cdk/fesm2022/cdk.mjs","node_modules/@angular/material/fesm2022/core.mjs","node_modules/@angular/material/fesm2022/dialog.mjs","node_modules/@angular/material/fesm2022/legacy-dialog.mjs"],"sourcesContent":["import { ElementRef } from '@angular/core';\n\n/** Coerces a data-bound value (typically a string) to a boolean. */\nfunction coerceBooleanProperty(value) {\n return value != null && `${value}` !== 'false';\n}\nfunction coerceNumberProperty(value, fallbackValue = 0) {\n return _isNumberValue(value) ? Number(value) : fallbackValue;\n}\n/**\n * Whether the provided value is considered a number.\n * @docs-private\n */\nfunction _isNumberValue(value) {\n // parseFloat(value) handles most of the cases we're interested in (it treats null, empty string,\n // and other non-number values as NaN, where Number just uses 0) but it considers the string\n // '123hello' to be a valid number. Therefore we also check if Number(value) is NaN.\n return !isNaN(parseFloat(value)) && !isNaN(Number(value));\n}\nfunction coerceArray(value) {\n return Array.isArray(value) ? value : [value];\n}\n\n/** Coerces a value to a CSS pixel value. */\nfunction coerceCssPixelValue(value) {\n if (value == null) {\n return '';\n }\n return typeof value === 'string' ? value : `${value}px`;\n}\n\n/**\n * Coerces an ElementRef or an Element into an element.\n * Useful for APIs that can accept either a ref or the native element itself.\n */\nfunction coerceElement(elementOrRef) {\n return elementOrRef instanceof ElementRef ? elementOrRef.nativeElement : elementOrRef;\n}\n\n/**\n * Coerces a value to an array of trimmed non-empty strings.\n * Any input that is not an array, `null` or `undefined` will be turned into a string\n * via `toString()` and subsequently split with the given separator.\n * `null` and `undefined` will result in an empty array.\n * This results in the following outcomes:\n * - `null` -> `[]`\n * - `[null]` -> `[\"null\"]`\n * - `[\"a\", \"b \", \" \"]` -> `[\"a\", \"b\"]`\n * - `[1, [2, 3]]` -> `[\"1\", \"2,3\"]`\n * - `[{ a: 0 }]` -> `[\"[object Object]\"]`\n * - `{ a: 0 }` -> `[\"[object\", \"Object]\"]`\n *\n * Useful for defining CSS classes or table columns.\n * @param value the value to coerce into an array of strings\n * @param separator split-separator if value isn't an array\n */\nfunction coerceStringArray(value, separator = /\\s+/) {\n const result = [];\n if (value != null) {\n const sourceValues = Array.isArray(value) ? value : `${value}`.split(separator);\n for (const sourceValue of sourceValues) {\n const trimmedString = `${sourceValue}`.trim();\n if (trimmedString) {\n result.push(trimmedString);\n }\n }\n }\n return result;\n}\nexport { _isNumberValue, coerceArray, coerceBooleanProperty, coerceCssPixelValue, coerceElement, coerceNumberProperty, coerceStringArray };\n","import * as i0 from '@angular/core';\nimport { PLATFORM_ID, Injectable, Inject, NgModule } from '@angular/core';\nimport { isPlatformBrowser } from '@angular/common';\n\n// Whether the current platform supports the V8 Break Iterator. The V8 check\n// is necessary to detect all Blink based browsers.\nlet hasV8BreakIterator;\n// We need a try/catch around the reference to `Intl`, because accessing it in some cases can\n// cause IE to throw. These cases are tied to particular versions of Windows and can happen if\n// the consumer is providing a polyfilled `Map`. See:\n// https://github.com/Microsoft/ChakraCore/issues/3189\n// https://github.com/angular/components/issues/15687\ntry {\n hasV8BreakIterator = typeof Intl !== 'undefined' && Intl.v8BreakIterator;\n} catch {\n hasV8BreakIterator = false;\n}\n/**\n * Service to detect the current platform by comparing the userAgent strings and\n * checking browser-specific global properties.\n */\nclass Platform {\n constructor(_platformId) {\n this._platformId = _platformId;\n // We want to use the Angular platform check because if the Document is shimmed\n // without the navigator, the following checks will fail. This is preferred because\n // sometimes the Document may be shimmed without the user's knowledge or intention\n /** Whether the Angular application is being rendered in the browser. */\n this.isBrowser = this._platformId ? isPlatformBrowser(this._platformId) : typeof document === 'object' && !!document;\n /** Whether the current browser is Microsoft Edge. */\n this.EDGE = this.isBrowser && /(edge)/i.test(navigator.userAgent);\n /** Whether the current rendering engine is Microsoft Trident. */\n this.TRIDENT = this.isBrowser && /(msie|trident)/i.test(navigator.userAgent);\n // EdgeHTML and Trident mock Blink specific things and need to be excluded from this check.\n /** Whether the current rendering engine is Blink. */\n this.BLINK = this.isBrowser && !!(window.chrome || hasV8BreakIterator) && typeof CSS !== 'undefined' && !this.EDGE && !this.TRIDENT;\n // Webkit is part of the userAgent in EdgeHTML, Blink and Trident. Therefore we need to\n // ensure that Webkit runs standalone and is not used as another engine's base.\n /** Whether the current rendering engine is WebKit. */\n this.WEBKIT = this.isBrowser && /AppleWebKit/i.test(navigator.userAgent) && !this.BLINK && !this.EDGE && !this.TRIDENT;\n /** Whether the current platform is Apple iOS. */\n this.IOS = this.isBrowser && /iPad|iPhone|iPod/.test(navigator.userAgent) && !('MSStream' in window);\n // It's difficult to detect the plain Gecko engine, because most of the browsers identify\n // them self as Gecko-like browsers and modify the userAgent's according to that.\n // Since we only cover one explicit Firefox case, we can simply check for Firefox\n // instead of having an unstable check for Gecko.\n /** Whether the current browser is Firefox. */\n this.FIREFOX = this.isBrowser && /(firefox|minefield)/i.test(navigator.userAgent);\n /** Whether the current platform is Android. */\n // Trident on mobile adds the android platform to the userAgent to trick detections.\n this.ANDROID = this.isBrowser && /android/i.test(navigator.userAgent) && !this.TRIDENT;\n // Safari browsers will include the Safari keyword in their userAgent. Some browsers may fake\n // this and just place the Safari keyword in the userAgent. To be more safe about Safari every\n // Safari browser should also use Webkit as its layout engine.\n /** Whether the current browser is Safari. */\n this.SAFARI = this.isBrowser && /safari/i.test(navigator.userAgent) && this.WEBKIT;\n }\n static {\n this.ɵfac = function Platform_Factory(ɵt) {\n return new (ɵt || Platform)(i0.ɵɵinject(PLATFORM_ID));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: Platform,\n factory: Platform.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(Platform, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: Object,\n decorators: [{\n type: Inject,\n args: [PLATFORM_ID]\n }]\n }];\n }, null);\n})();\nclass PlatformModule {\n static {\n this.ɵfac = function PlatformModule_Factory(ɵt) {\n return new (ɵt || PlatformModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: PlatformModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({});\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(PlatformModule, [{\n type: NgModule,\n args: [{}]\n }], null, null);\n})();\n\n/** Cached result Set of input types support by the current browser. */\nlet supportedInputTypes;\n/** Types of `` that *might* be supported. */\nconst candidateInputTypes = [\n// `color` must come first. Chrome 56 shows a warning if we change the type to `color` after\n// first changing it to something else:\n// The specified value \"\" does not conform to the required format.\n// The format is \"#rrggbb\" where rr, gg, bb are two-digit hexadecimal numbers.\n'color', 'button', 'checkbox', 'date', 'datetime-local', 'email', 'file', 'hidden', 'image', 'month', 'number', 'password', 'radio', 'range', 'reset', 'search', 'submit', 'tel', 'text', 'time', 'url', 'week'];\n/** @returns The input types supported by this browser. */\nfunction getSupportedInputTypes() {\n // Result is cached.\n if (supportedInputTypes) {\n return supportedInputTypes;\n }\n // We can't check if an input type is not supported until we're on the browser, so say that\n // everything is supported when not on the browser. We don't use `Platform` here since it's\n // just a helper function and can't inject it.\n if (typeof document !== 'object' || !document) {\n supportedInputTypes = new Set(candidateInputTypes);\n return supportedInputTypes;\n }\n let featureTestInput = document.createElement('input');\n supportedInputTypes = new Set(candidateInputTypes.filter(value => {\n featureTestInput.setAttribute('type', value);\n return featureTestInput.type === value;\n }));\n return supportedInputTypes;\n}\n\n/** Cached result of whether the user's browser supports passive event listeners. */\nlet supportsPassiveEvents;\n/**\n * Checks whether the user's browser supports passive event listeners.\n * See: https://github.com/WICG/EventListenerOptions/blob/gh-pages/explainer.md\n */\nfunction supportsPassiveEventListeners() {\n if (supportsPassiveEvents == null && typeof window !== 'undefined') {\n try {\n window.addEventListener('test', null, Object.defineProperty({}, 'passive', {\n get: () => supportsPassiveEvents = true\n }));\n } finally {\n supportsPassiveEvents = supportsPassiveEvents || false;\n }\n }\n return supportsPassiveEvents;\n}\n/**\n * Normalizes an `AddEventListener` object to something that can be passed\n * to `addEventListener` on any browser, no matter whether it supports the\n * `options` parameter.\n * @param options Object to be normalized.\n */\nfunction normalizePassiveListenerOptions(options) {\n return supportsPassiveEventListeners() ? options : !!options.capture;\n}\n\n/** Cached result of the way the browser handles the horizontal scroll axis in RTL mode. */\nlet rtlScrollAxisType;\n/** Cached result of the check that indicates whether the browser supports scroll behaviors. */\nlet scrollBehaviorSupported;\n/** Check whether the browser supports scroll behaviors. */\nfunction supportsScrollBehavior() {\n if (scrollBehaviorSupported == null) {\n // If we're not in the browser, it can't be supported. Also check for `Element`, because\n // some projects stub out the global `document` during SSR which can throw us off.\n if (typeof document !== 'object' || !document || typeof Element !== 'function' || !Element) {\n scrollBehaviorSupported = false;\n return scrollBehaviorSupported;\n }\n // If the element can have a `scrollBehavior` style, we can be sure that it's supported.\n if ('scrollBehavior' in document.documentElement.style) {\n scrollBehaviorSupported = true;\n } else {\n // At this point we have 3 possibilities: `scrollTo` isn't supported at all, it's\n // supported but it doesn't handle scroll behavior, or it has been polyfilled.\n const scrollToFunction = Element.prototype.scrollTo;\n if (scrollToFunction) {\n // We can detect if the function has been polyfilled by calling `toString` on it. Native\n // functions are obfuscated using `[native code]`, whereas if it was overwritten we'd get\n // the actual function source. Via https://davidwalsh.name/detect-native-function. Consider\n // polyfilled functions as supporting scroll behavior.\n scrollBehaviorSupported = !/\\{\\s*\\[native code\\]\\s*\\}/.test(scrollToFunction.toString());\n } else {\n scrollBehaviorSupported = false;\n }\n }\n }\n return scrollBehaviorSupported;\n}\n/**\n * Checks the type of RTL scroll axis used by this browser. As of time of writing, Chrome is NORMAL,\n * Firefox & Safari are NEGATED, and IE & Edge are INVERTED.\n */\nfunction getRtlScrollAxisType() {\n // We can't check unless we're on the browser. Just assume 'normal' if we're not.\n if (typeof document !== 'object' || !document) {\n return 0 /* RtlScrollAxisType.NORMAL */;\n }\n if (rtlScrollAxisType == null) {\n // Create a 1px wide scrolling container and a 2px wide content element.\n const scrollContainer = document.createElement('div');\n const containerStyle = scrollContainer.style;\n scrollContainer.dir = 'rtl';\n containerStyle.width = '1px';\n containerStyle.overflow = 'auto';\n containerStyle.visibility = 'hidden';\n containerStyle.pointerEvents = 'none';\n containerStyle.position = 'absolute';\n const content = document.createElement('div');\n const contentStyle = content.style;\n contentStyle.width = '2px';\n contentStyle.height = '1px';\n scrollContainer.appendChild(content);\n document.body.appendChild(scrollContainer);\n rtlScrollAxisType = 0 /* RtlScrollAxisType.NORMAL */;\n // The viewport starts scrolled all the way to the right in RTL mode. If we are in a NORMAL\n // browser this would mean that the scrollLeft should be 1. If it's zero instead we know we're\n // dealing with one of the other two types of browsers.\n if (scrollContainer.scrollLeft === 0) {\n // In a NEGATED browser the scrollLeft is always somewhere in [-maxScrollAmount, 0]. For an\n // INVERTED browser it is always somewhere in [0, maxScrollAmount]. We can determine which by\n // setting to the scrollLeft to 1. This is past the max for a NEGATED browser, so it will\n // return 0 when we read it again.\n scrollContainer.scrollLeft = 1;\n rtlScrollAxisType = scrollContainer.scrollLeft === 0 ? 1 /* RtlScrollAxisType.NEGATED */ : 2 /* RtlScrollAxisType.INVERTED */;\n }\n scrollContainer.remove();\n }\n return rtlScrollAxisType;\n}\nlet shadowDomIsSupported;\n/** Checks whether the user's browser support Shadow DOM. */\nfunction _supportsShadowDom() {\n if (shadowDomIsSupported == null) {\n const head = typeof document !== 'undefined' ? document.head : null;\n shadowDomIsSupported = !!(head && (head.createShadowRoot || head.attachShadow));\n }\n return shadowDomIsSupported;\n}\n/** Gets the shadow root of an element, if supported and the element is inside the Shadow DOM. */\nfunction _getShadowRoot(element) {\n if (_supportsShadowDom()) {\n const rootNode = element.getRootNode ? element.getRootNode() : null;\n // Note that this should be caught by `_supportsShadowDom`, but some\n // teams have been able to hit this code path on unsupported browsers.\n if (typeof ShadowRoot !== 'undefined' && ShadowRoot && rootNode instanceof ShadowRoot) {\n return rootNode;\n }\n }\n return null;\n}\n/**\n * Gets the currently-focused element on the page while\n * also piercing through Shadow DOM boundaries.\n */\nfunction _getFocusedElementPierceShadowDom() {\n let activeElement = typeof document !== 'undefined' && document ? document.activeElement : null;\n while (activeElement && activeElement.shadowRoot) {\n const newActiveElement = activeElement.shadowRoot.activeElement;\n if (newActiveElement === activeElement) {\n break;\n } else {\n activeElement = newActiveElement;\n }\n }\n return activeElement;\n}\n/** Gets the target of an event while accounting for Shadow DOM. */\nfunction _getEventTarget(event) {\n // If an event is bound outside the Shadow DOM, the `event.target` will\n // point to the shadow root so we have to use `composedPath` instead.\n return event.composedPath ? event.composedPath()[0] : event.target;\n}\n\n/** Gets whether the code is currently running in a test environment. */\nfunction _isTestEnvironment() {\n // We can't use `declare const` because it causes conflicts inside Google with the real typings\n // for these symbols and we can't read them off the global object, because they don't appear to\n // be attached there for some runners like Jest.\n // (see: https://github.com/angular/components/issues/23365#issuecomment-938146643)\n return (\n // @ts-ignore\n typeof __karma__ !== 'undefined' && !!__karma__ ||\n // @ts-ignore\n typeof jasmine !== 'undefined' && !!jasmine ||\n // @ts-ignore\n typeof jest !== 'undefined' && !!jest ||\n // @ts-ignore\n typeof Mocha !== 'undefined' && !!Mocha\n );\n}\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { Platform, PlatformModule, _getEventTarget, _getFocusedElementPierceShadowDom, _getShadowRoot, _isTestEnvironment, _supportsShadowDom, getRtlScrollAxisType, getSupportedInputTypes, normalizePassiveListenerOptions, supportsPassiveEventListeners, supportsScrollBehavior };\n","import * as i0 from '@angular/core';\nimport { InjectionToken, inject, EventEmitter, Injectable, Optional, Inject, Directive, Output, Input, NgModule } from '@angular/core';\nimport { DOCUMENT } from '@angular/common';\n\n/**\n * Injection token used to inject the document into Directionality.\n * This is used so that the value can be faked in tests.\n *\n * We can't use the real document in tests because changing the real `dir` causes geometry-based\n * tests in Safari to fail.\n *\n * We also can't re-provide the DOCUMENT token from platform-browser because the unit tests\n * themselves use things like `querySelector` in test code.\n *\n * This token is defined in a separate file from Directionality as a workaround for\n * https://github.com/angular/angular/issues/22559\n *\n * @docs-private\n */\nconst DIR_DOCUMENT = new InjectionToken('cdk-dir-doc', {\n providedIn: 'root',\n factory: DIR_DOCUMENT_FACTORY\n});\n/** @docs-private */\nfunction DIR_DOCUMENT_FACTORY() {\n return inject(DOCUMENT);\n}\n\n/** Regex that matches locales with an RTL script. Taken from `goog.i18n.bidi.isRtlLanguage`. */\nconst RTL_LOCALE_PATTERN = /^(ar|ckb|dv|he|iw|fa|nqo|ps|sd|ug|ur|yi|.*[-_](Adlm|Arab|Hebr|Nkoo|Rohg|Thaa))(?!.*[-_](Latn|Cyrl)($|-|_))($|-|_)/i;\n/** Resolves a string value to a specific direction. */\nfunction _resolveDirectionality(rawValue) {\n const value = rawValue?.toLowerCase() || '';\n if (value === 'auto' && typeof navigator !== 'undefined' && navigator?.language) {\n return RTL_LOCALE_PATTERN.test(navigator.language) ? 'rtl' : 'ltr';\n }\n return value === 'rtl' ? 'rtl' : 'ltr';\n}\n/**\n * The directionality (LTR / RTL) context for the application (or a subtree of it).\n * Exposes the current direction and a stream of direction changes.\n */\nclass Directionality {\n constructor(_document) {\n /** The current 'ltr' or 'rtl' value. */\n this.value = 'ltr';\n /** Stream that emits whenever the 'ltr' / 'rtl' state changes. */\n this.change = new EventEmitter();\n if (_document) {\n const bodyDir = _document.body ? _document.body.dir : null;\n const htmlDir = _document.documentElement ? _document.documentElement.dir : null;\n this.value = _resolveDirectionality(bodyDir || htmlDir || 'ltr');\n }\n }\n ngOnDestroy() {\n this.change.complete();\n }\n static {\n this.ɵfac = function Directionality_Factory(ɵt) {\n return new (ɵt || Directionality)(i0.ɵɵinject(DIR_DOCUMENT, 8));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: Directionality,\n factory: Directionality.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(Directionality, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [DIR_DOCUMENT]\n }]\n }];\n }, null);\n})();\n\n/**\n * Directive to listen for changes of direction of part of the DOM.\n *\n * Provides itself as Directionality such that descendant directives only need to ever inject\n * Directionality to get the closest direction.\n */\nclass Dir {\n constructor() {\n /** Normalized direction that accounts for invalid/unsupported values. */\n this._dir = 'ltr';\n /** Whether the `value` has been set to its initial value. */\n this._isInitialized = false;\n /** Event emitted when the direction changes. */\n this.change = new EventEmitter();\n }\n /** @docs-private */\n get dir() {\n return this._dir;\n }\n set dir(value) {\n const previousValue = this._dir;\n // Note: `_resolveDirectionality` resolves the language based on the browser's language,\n // whereas the browser does it based on the content of the element. Since doing so based\n // on the content can be expensive, for now we're doing the simpler matching.\n this._dir = _resolveDirectionality(value);\n this._rawDir = value;\n if (previousValue !== this._dir && this._isInitialized) {\n this.change.emit(this._dir);\n }\n }\n /** Current layout direction of the element. */\n get value() {\n return this.dir;\n }\n /** Initialize once default value has been set. */\n ngAfterContentInit() {\n this._isInitialized = true;\n }\n ngOnDestroy() {\n this.change.complete();\n }\n static {\n this.ɵfac = function Dir_Factory(ɵt) {\n return new (ɵt || Dir)();\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: Dir,\n selectors: [[\"\", \"dir\", \"\"]],\n hostVars: 1,\n hostBindings: function Dir_HostBindings(rf, ctx) {\n if (rf & 2) {\n i0.ɵɵattribute(\"dir\", ctx._rawDir);\n }\n },\n inputs: {\n dir: \"dir\"\n },\n outputs: {\n change: \"dirChange\"\n },\n exportAs: [\"dir\"],\n features: [i0.ɵɵProvidersFeature([{\n provide: Directionality,\n useExisting: Dir\n }])]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(Dir, [{\n type: Directive,\n args: [{\n selector: '[dir]',\n providers: [{\n provide: Directionality,\n useExisting: Dir\n }],\n host: {\n '[attr.dir]': '_rawDir'\n },\n exportAs: 'dir'\n }]\n }], null, {\n change: [{\n type: Output,\n args: ['dirChange']\n }],\n dir: [{\n type: Input\n }]\n });\n})();\nclass BidiModule {\n static {\n this.ɵfac = function BidiModule_Factory(ɵt) {\n return new (ɵt || BidiModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: BidiModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({});\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(BidiModule, [{\n type: NgModule,\n args: [{\n exports: [Dir],\n declarations: [Dir]\n }]\n }], null, null);\n})();\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { BidiModule, DIR_DOCUMENT, Dir, Directionality };\n","import { ConnectableObservable, isObservable, of, Subject } from 'rxjs';\nimport * as i0 from '@angular/core';\nimport { Injectable, InjectionToken } from '@angular/core';\nclass DataSource {}\n/** Checks whether an object is a data source. */\nfunction isDataSource(value) {\n // Check if the value is a DataSource by observing if it has a connect function. Cannot\n // be checked as an `instanceof DataSource` since people could create their own sources\n // that match the interface, but don't extend DataSource. We also can't use `isObservable`\n // here, because of some internal apps.\n return value && typeof value.connect === 'function' && !(value instanceof ConnectableObservable);\n}\n\n/** DataSource wrapper for a native array. */\nclass ArrayDataSource extends DataSource {\n constructor(_data) {\n super();\n this._data = _data;\n }\n connect() {\n return isObservable(this._data) ? this._data : of(this._data);\n }\n disconnect() {}\n}\n\n/**\n * A repeater that destroys views when they are removed from a\n * {@link ViewContainerRef}. When new items are inserted into the container,\n * the repeater will always construct a new embedded view for each item.\n *\n * @template T The type for the embedded view's $implicit property.\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nclass _DisposeViewRepeaterStrategy {\n applyChanges(changes, viewContainerRef, itemContextFactory, itemValueResolver, itemViewChanged) {\n changes.forEachOperation((record, adjustedPreviousIndex, currentIndex) => {\n let view;\n let operation;\n if (record.previousIndex == null) {\n const insertContext = itemContextFactory(record, adjustedPreviousIndex, currentIndex);\n view = viewContainerRef.createEmbeddedView(insertContext.templateRef, insertContext.context, insertContext.index);\n operation = 1 /* _ViewRepeaterOperation.INSERTED */;\n } else if (currentIndex == null) {\n viewContainerRef.remove(adjustedPreviousIndex);\n operation = 3 /* _ViewRepeaterOperation.REMOVED */;\n } else {\n view = viewContainerRef.get(adjustedPreviousIndex);\n viewContainerRef.move(view, currentIndex);\n operation = 2 /* _ViewRepeaterOperation.MOVED */;\n }\n if (itemViewChanged) {\n itemViewChanged({\n context: view?.context,\n operation,\n record\n });\n }\n });\n }\n detach() {}\n}\n\n/**\n * A repeater that caches views when they are removed from a\n * {@link ViewContainerRef}. When new items are inserted into the container,\n * the repeater will reuse one of the cached views instead of creating a new\n * embedded view. Recycling cached views reduces the quantity of expensive DOM\n * inserts.\n *\n * @template T The type for the embedded view's $implicit property.\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nclass _RecycleViewRepeaterStrategy {\n constructor() {\n /**\n * The size of the cache used to store unused views.\n * Setting the cache size to `0` will disable caching. Defaults to 20 views.\n */\n this.viewCacheSize = 20;\n /**\n * View cache that stores embedded view instances that have been previously stamped out,\n * but don't are not currently rendered. The view repeater will reuse these views rather than\n * creating brand new ones.\n *\n * TODO(michaeljamesparsons) Investigate whether using a linked list would improve performance.\n */\n this._viewCache = [];\n }\n /** Apply changes to the DOM. */\n applyChanges(changes, viewContainerRef, itemContextFactory, itemValueResolver, itemViewChanged) {\n // Rearrange the views to put them in the right location.\n changes.forEachOperation((record, adjustedPreviousIndex, currentIndex) => {\n let view;\n let operation;\n if (record.previousIndex == null) {\n // Item added.\n const viewArgsFactory = () => itemContextFactory(record, adjustedPreviousIndex, currentIndex);\n view = this._insertView(viewArgsFactory, currentIndex, viewContainerRef, itemValueResolver(record));\n operation = view ? 1 /* _ViewRepeaterOperation.INSERTED */ : 0 /* _ViewRepeaterOperation.REPLACED */;\n } else if (currentIndex == null) {\n // Item removed.\n this._detachAndCacheView(adjustedPreviousIndex, viewContainerRef);\n operation = 3 /* _ViewRepeaterOperation.REMOVED */;\n } else {\n // Item moved.\n view = this._moveView(adjustedPreviousIndex, currentIndex, viewContainerRef, itemValueResolver(record));\n operation = 2 /* _ViewRepeaterOperation.MOVED */;\n }\n if (itemViewChanged) {\n itemViewChanged({\n context: view?.context,\n operation,\n record\n });\n }\n });\n }\n detach() {\n for (const view of this._viewCache) {\n view.destroy();\n }\n this._viewCache = [];\n }\n /**\n * Inserts a view for a new item, either from the cache or by creating a new\n * one. Returns `undefined` if the item was inserted into a cached view.\n */\n _insertView(viewArgsFactory, currentIndex, viewContainerRef, value) {\n const cachedView = this._insertViewFromCache(currentIndex, viewContainerRef);\n if (cachedView) {\n cachedView.context.$implicit = value;\n return undefined;\n }\n const viewArgs = viewArgsFactory();\n return viewContainerRef.createEmbeddedView(viewArgs.templateRef, viewArgs.context, viewArgs.index);\n }\n /** Detaches the view at the given index and inserts into the view cache. */\n _detachAndCacheView(index, viewContainerRef) {\n const detachedView = viewContainerRef.detach(index);\n this._maybeCacheView(detachedView, viewContainerRef);\n }\n /** Moves view at the previous index to the current index. */\n _moveView(adjustedPreviousIndex, currentIndex, viewContainerRef, value) {\n const view = viewContainerRef.get(adjustedPreviousIndex);\n viewContainerRef.move(view, currentIndex);\n view.context.$implicit = value;\n return view;\n }\n /**\n * Cache the given detached view. If the cache is full, the view will be\n * destroyed.\n */\n _maybeCacheView(view, viewContainerRef) {\n if (this._viewCache.length < this.viewCacheSize) {\n this._viewCache.push(view);\n } else {\n const index = viewContainerRef.indexOf(view);\n // The host component could remove views from the container outside of\n // the view repeater. It's unlikely this will occur, but just in case,\n // destroy the view on its own, otherwise destroy it through the\n // container to ensure that all the references are removed.\n if (index === -1) {\n view.destroy();\n } else {\n viewContainerRef.remove(index);\n }\n }\n }\n /** Inserts a recycled view from the cache at the given index. */\n _insertViewFromCache(index, viewContainerRef) {\n const cachedView = this._viewCache.pop();\n if (cachedView) {\n viewContainerRef.insert(cachedView, index);\n }\n return cachedView || null;\n }\n}\n\n/**\n * Class to be used to power selecting one or more options from a list.\n */\nclass SelectionModel {\n /** Selected values. */\n get selected() {\n if (!this._selected) {\n this._selected = Array.from(this._selection.values());\n }\n return this._selected;\n }\n constructor(_multiple = false, initiallySelectedValues, _emitChanges = true, compareWith) {\n this._multiple = _multiple;\n this._emitChanges = _emitChanges;\n this.compareWith = compareWith;\n /** Currently-selected values. */\n this._selection = new Set();\n /** Keeps track of the deselected options that haven't been emitted by the change event. */\n this._deselectedToEmit = [];\n /** Keeps track of the selected options that haven't been emitted by the change event. */\n this._selectedToEmit = [];\n /** Event emitted when the value has changed. */\n this.changed = new Subject();\n if (initiallySelectedValues && initiallySelectedValues.length) {\n if (_multiple) {\n initiallySelectedValues.forEach(value => this._markSelected(value));\n } else {\n this._markSelected(initiallySelectedValues[0]);\n }\n // Clear the array in order to avoid firing the change event for preselected values.\n this._selectedToEmit.length = 0;\n }\n }\n /**\n * Selects a value or an array of values.\n * @param values The values to select\n * @return Whether the selection changed as a result of this call\n * @breaking-change 16.0.0 make return type boolean\n */\n select(...values) {\n this._verifyValueAssignment(values);\n values.forEach(value => this._markSelected(value));\n const changed = this._hasQueuedChanges();\n this._emitChangeEvent();\n return changed;\n }\n /**\n * Deselects a value or an array of values.\n * @param values The values to deselect\n * @return Whether the selection changed as a result of this call\n * @breaking-change 16.0.0 make return type boolean\n */\n deselect(...values) {\n this._verifyValueAssignment(values);\n values.forEach(value => this._unmarkSelected(value));\n const changed = this._hasQueuedChanges();\n this._emitChangeEvent();\n return changed;\n }\n /**\n * Sets the selected values\n * @param values The new selected values\n * @return Whether the selection changed as a result of this call\n * @breaking-change 16.0.0 make return type boolean\n */\n setSelection(...values) {\n this._verifyValueAssignment(values);\n const oldValues = this.selected;\n const newSelectedSet = new Set(values);\n values.forEach(value => this._markSelected(value));\n oldValues.filter(value => !newSelectedSet.has(value)).forEach(value => this._unmarkSelected(value));\n const changed = this._hasQueuedChanges();\n this._emitChangeEvent();\n return changed;\n }\n /**\n * Toggles a value between selected and deselected.\n * @param value The value to toggle\n * @return Whether the selection changed as a result of this call\n * @breaking-change 16.0.0 make return type boolean\n */\n toggle(value) {\n return this.isSelected(value) ? this.deselect(value) : this.select(value);\n }\n /**\n * Clears all of the selected values.\n * @param flushEvent Whether to flush the changes in an event.\n * If false, the changes to the selection will be flushed along with the next event.\n * @return Whether the selection changed as a result of this call\n * @breaking-change 16.0.0 make return type boolean\n */\n clear(flushEvent = true) {\n this._unmarkAll();\n const changed = this._hasQueuedChanges();\n if (flushEvent) {\n this._emitChangeEvent();\n }\n return changed;\n }\n /**\n * Determines whether a value is selected.\n */\n isSelected(value) {\n return this._selection.has(this._getConcreteValue(value));\n }\n /**\n * Determines whether the model does not have a value.\n */\n isEmpty() {\n return this._selection.size === 0;\n }\n /**\n * Determines whether the model has a value.\n */\n hasValue() {\n return !this.isEmpty();\n }\n /**\n * Sorts the selected values based on a predicate function.\n */\n sort(predicate) {\n if (this._multiple && this.selected) {\n this._selected.sort(predicate);\n }\n }\n /**\n * Gets whether multiple values can be selected.\n */\n isMultipleSelection() {\n return this._multiple;\n }\n /** Emits a change event and clears the records of selected and deselected values. */\n _emitChangeEvent() {\n // Clear the selected values so they can be re-cached.\n this._selected = null;\n if (this._selectedToEmit.length || this._deselectedToEmit.length) {\n this.changed.next({\n source: this,\n added: this._selectedToEmit,\n removed: this._deselectedToEmit\n });\n this._deselectedToEmit = [];\n this._selectedToEmit = [];\n }\n }\n /** Selects a value. */\n _markSelected(value) {\n value = this._getConcreteValue(value);\n if (!this.isSelected(value)) {\n if (!this._multiple) {\n this._unmarkAll();\n }\n if (!this.isSelected(value)) {\n this._selection.add(value);\n }\n if (this._emitChanges) {\n this._selectedToEmit.push(value);\n }\n }\n }\n /** Deselects a value. */\n _unmarkSelected(value) {\n value = this._getConcreteValue(value);\n if (this.isSelected(value)) {\n this._selection.delete(value);\n if (this._emitChanges) {\n this._deselectedToEmit.push(value);\n }\n }\n }\n /** Clears out the selected values. */\n _unmarkAll() {\n if (!this.isEmpty()) {\n this._selection.forEach(value => this._unmarkSelected(value));\n }\n }\n /**\n * Verifies the value assignment and throws an error if the specified value array is\n * including multiple values while the selection model is not supporting multiple values.\n */\n _verifyValueAssignment(values) {\n if (values.length > 1 && !this._multiple && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw getMultipleValuesInSingleSelectionError();\n }\n }\n /** Whether there are queued up change to be emitted. */\n _hasQueuedChanges() {\n return !!(this._deselectedToEmit.length || this._selectedToEmit.length);\n }\n /** Returns a value that is comparable to inputValue by applying compareWith function, returns the same inputValue otherwise. */\n _getConcreteValue(inputValue) {\n if (!this.compareWith) {\n return inputValue;\n } else {\n for (let selectedValue of this._selection) {\n if (this.compareWith(inputValue, selectedValue)) {\n return selectedValue;\n }\n }\n return inputValue;\n }\n }\n}\n/**\n * Returns an error that reports that multiple values are passed into a selection model\n * with a single value.\n * @docs-private\n */\nfunction getMultipleValuesInSingleSelectionError() {\n return Error('Cannot pass multiple values into SelectionModel with single-value mode.');\n}\n\n/**\n * Class to coordinate unique selection based on name.\n * Intended to be consumed as an Angular service.\n * This service is needed because native radio change events are only fired on the item currently\n * being selected, and we still need to uncheck the previous selection.\n *\n * This service does not *store* any IDs and names because they may change at any time, so it is\n * less error-prone if they are simply passed through when the events occur.\n */\nclass UniqueSelectionDispatcher {\n constructor() {\n this._listeners = [];\n }\n /**\n * Notify other items that selection for the given name has been set.\n * @param id ID of the item.\n * @param name Name of the item.\n */\n notify(id, name) {\n for (let listener of this._listeners) {\n listener(id, name);\n }\n }\n /**\n * Listen for future changes to item selection.\n * @return Function used to deregister listener\n */\n listen(listener) {\n this._listeners.push(listener);\n return () => {\n this._listeners = this._listeners.filter(registered => {\n return listener !== registered;\n });\n };\n }\n ngOnDestroy() {\n this._listeners = [];\n }\n static {\n this.ɵfac = function UniqueSelectionDispatcher_Factory(ɵt) {\n return new (ɵt || UniqueSelectionDispatcher)();\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: UniqueSelectionDispatcher,\n factory: UniqueSelectionDispatcher.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(UniqueSelectionDispatcher, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], null, null);\n})();\n\n/**\n * Injection token for {@link _ViewRepeater}. This token is for use by Angular Material only.\n * @docs-private\n */\nconst _VIEW_REPEATER_STRATEGY = new InjectionToken('_ViewRepeater');\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { ArrayDataSource, DataSource, SelectionModel, UniqueSelectionDispatcher, _DisposeViewRepeaterStrategy, _RecycleViewRepeaterStrategy, _VIEW_REPEATER_STRATEGY, getMultipleValuesInSingleSelectionError, isDataSource };\n","import { coerceNumberProperty, coerceElement, coerceBooleanProperty } from '@angular/cdk/coercion';\nimport * as i0 from '@angular/core';\nimport { InjectionToken, forwardRef, Directive, Input, Injectable, Optional, Inject, inject, Component, ViewEncapsulation, ChangeDetectionStrategy, Output, ViewChild, SkipSelf, ElementRef, NgModule } from '@angular/core';\nimport { Subject, of, Observable, fromEvent, animationFrameScheduler, asapScheduler, Subscription, isObservable } from 'rxjs';\nimport { distinctUntilChanged, auditTime, filter, takeUntil, startWith, pairwise, switchMap, shareReplay } from 'rxjs/operators';\nimport * as i1 from '@angular/cdk/platform';\nimport { getRtlScrollAxisType, supportsScrollBehavior, Platform } from '@angular/cdk/platform';\nimport { DOCUMENT } from '@angular/common';\nimport * as i2 from '@angular/cdk/bidi';\nimport { BidiModule } from '@angular/cdk/bidi';\nimport * as i2$1 from '@angular/cdk/collections';\nimport { isDataSource, ArrayDataSource, _VIEW_REPEATER_STRATEGY, _RecycleViewRepeaterStrategy } from '@angular/cdk/collections';\n\n/** The injection token used to specify the virtual scrolling strategy. */\nconst _c0 = [\"contentWrapper\"];\nconst _c1 = [\"*\"];\nconst VIRTUAL_SCROLL_STRATEGY = new InjectionToken('VIRTUAL_SCROLL_STRATEGY');\n\n/** Virtual scrolling strategy for lists with items of known fixed size. */\nclass FixedSizeVirtualScrollStrategy {\n /**\n * @param itemSize The size of the items in the virtually scrolling list.\n * @param minBufferPx The minimum amount of buffer (in pixels) before needing to render more\n * @param maxBufferPx The amount of buffer (in pixels) to render when rendering more.\n */\n constructor(itemSize, minBufferPx, maxBufferPx) {\n this._scrolledIndexChange = new Subject();\n /** @docs-private Implemented as part of VirtualScrollStrategy. */\n this.scrolledIndexChange = this._scrolledIndexChange.pipe(distinctUntilChanged());\n /** The attached viewport. */\n this._viewport = null;\n this._itemSize = itemSize;\n this._minBufferPx = minBufferPx;\n this._maxBufferPx = maxBufferPx;\n }\n /**\n * Attaches this scroll strategy to a viewport.\n * @param viewport The viewport to attach this strategy to.\n */\n attach(viewport) {\n this._viewport = viewport;\n this._updateTotalContentSize();\n this._updateRenderedRange();\n }\n /** Detaches this scroll strategy from the currently attached viewport. */\n detach() {\n this._scrolledIndexChange.complete();\n this._viewport = null;\n }\n /**\n * Update the item size and buffer size.\n * @param itemSize The size of the items in the virtually scrolling list.\n * @param minBufferPx The minimum amount of buffer (in pixels) before needing to render more\n * @param maxBufferPx The amount of buffer (in pixels) to render when rendering more.\n */\n updateItemAndBufferSize(itemSize, minBufferPx, maxBufferPx) {\n if (maxBufferPx < minBufferPx && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw Error('CDK virtual scroll: maxBufferPx must be greater than or equal to minBufferPx');\n }\n this._itemSize = itemSize;\n this._minBufferPx = minBufferPx;\n this._maxBufferPx = maxBufferPx;\n this._updateTotalContentSize();\n this._updateRenderedRange();\n }\n /** @docs-private Implemented as part of VirtualScrollStrategy. */\n onContentScrolled() {\n this._updateRenderedRange();\n }\n /** @docs-private Implemented as part of VirtualScrollStrategy. */\n onDataLengthChanged() {\n this._updateTotalContentSize();\n this._updateRenderedRange();\n }\n /** @docs-private Implemented as part of VirtualScrollStrategy. */\n onContentRendered() {\n /* no-op */\n }\n /** @docs-private Implemented as part of VirtualScrollStrategy. */\n onRenderedOffsetChanged() {\n /* no-op */\n }\n /**\n * Scroll to the offset for the given index.\n * @param index The index of the element to scroll to.\n * @param behavior The ScrollBehavior to use when scrolling.\n */\n scrollToIndex(index, behavior) {\n if (this._viewport) {\n this._viewport.scrollToOffset(index * this._itemSize, behavior);\n }\n }\n /** Update the viewport's total content size. */\n _updateTotalContentSize() {\n if (!this._viewport) {\n return;\n }\n this._viewport.setTotalContentSize(this._viewport.getDataLength() * this._itemSize);\n }\n /** Update the viewport's rendered range. */\n _updateRenderedRange() {\n if (!this._viewport) {\n return;\n }\n const renderedRange = this._viewport.getRenderedRange();\n const newRange = {\n start: renderedRange.start,\n end: renderedRange.end\n };\n const viewportSize = this._viewport.getViewportSize();\n const dataLength = this._viewport.getDataLength();\n let scrollOffset = this._viewport.measureScrollOffset();\n // Prevent NaN as result when dividing by zero.\n let firstVisibleIndex = this._itemSize > 0 ? scrollOffset / this._itemSize : 0;\n // If user scrolls to the bottom of the list and data changes to a smaller list\n if (newRange.end > dataLength) {\n // We have to recalculate the first visible index based on new data length and viewport size.\n const maxVisibleItems = Math.ceil(viewportSize / this._itemSize);\n const newVisibleIndex = Math.max(0, Math.min(firstVisibleIndex, dataLength - maxVisibleItems));\n // If first visible index changed we must update scroll offset to handle start/end buffers\n // Current range must also be adjusted to cover the new position (bottom of new list).\n if (firstVisibleIndex != newVisibleIndex) {\n firstVisibleIndex = newVisibleIndex;\n scrollOffset = newVisibleIndex * this._itemSize;\n newRange.start = Math.floor(firstVisibleIndex);\n }\n newRange.end = Math.max(0, Math.min(dataLength, newRange.start + maxVisibleItems));\n }\n const startBuffer = scrollOffset - newRange.start * this._itemSize;\n if (startBuffer < this._minBufferPx && newRange.start != 0) {\n const expandStart = Math.ceil((this._maxBufferPx - startBuffer) / this._itemSize);\n newRange.start = Math.max(0, newRange.start - expandStart);\n newRange.end = Math.min(dataLength, Math.ceil(firstVisibleIndex + (viewportSize + this._minBufferPx) / this._itemSize));\n } else {\n const endBuffer = newRange.end * this._itemSize - (scrollOffset + viewportSize);\n if (endBuffer < this._minBufferPx && newRange.end != dataLength) {\n const expandEnd = Math.ceil((this._maxBufferPx - endBuffer) / this._itemSize);\n if (expandEnd > 0) {\n newRange.end = Math.min(dataLength, newRange.end + expandEnd);\n newRange.start = Math.max(0, Math.floor(firstVisibleIndex - this._minBufferPx / this._itemSize));\n }\n }\n }\n this._viewport.setRenderedRange(newRange);\n this._viewport.setRenderedContentOffset(this._itemSize * newRange.start);\n this._scrolledIndexChange.next(Math.floor(firstVisibleIndex));\n }\n}\n/**\n * Provider factory for `FixedSizeVirtualScrollStrategy` that simply extracts the already created\n * `FixedSizeVirtualScrollStrategy` from the given directive.\n * @param fixedSizeDir The instance of `CdkFixedSizeVirtualScroll` to extract the\n * `FixedSizeVirtualScrollStrategy` from.\n */\nfunction _fixedSizeVirtualScrollStrategyFactory(fixedSizeDir) {\n return fixedSizeDir._scrollStrategy;\n}\n/** A virtual scroll strategy that supports fixed-size items. */\nclass CdkFixedSizeVirtualScroll {\n constructor() {\n this._itemSize = 20;\n this._minBufferPx = 100;\n this._maxBufferPx = 200;\n /** The scroll strategy used by this directive. */\n this._scrollStrategy = new FixedSizeVirtualScrollStrategy(this.itemSize, this.minBufferPx, this.maxBufferPx);\n }\n /** The size of the items in the list (in pixels). */\n get itemSize() {\n return this._itemSize;\n }\n set itemSize(value) {\n this._itemSize = coerceNumberProperty(value);\n }\n /**\n * The minimum amount of buffer rendered beyond the viewport (in pixels).\n * If the amount of buffer dips below this number, more items will be rendered. Defaults to 100px.\n */\n get minBufferPx() {\n return this._minBufferPx;\n }\n set minBufferPx(value) {\n this._minBufferPx = coerceNumberProperty(value);\n }\n /**\n * The number of pixels worth of buffer to render for when rendering new items. Defaults to 200px.\n */\n get maxBufferPx() {\n return this._maxBufferPx;\n }\n set maxBufferPx(value) {\n this._maxBufferPx = coerceNumberProperty(value);\n }\n ngOnChanges() {\n this._scrollStrategy.updateItemAndBufferSize(this.itemSize, this.minBufferPx, this.maxBufferPx);\n }\n static {\n this.ɵfac = function CdkFixedSizeVirtualScroll_Factory(ɵt) {\n return new (ɵt || CdkFixedSizeVirtualScroll)();\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkFixedSizeVirtualScroll,\n selectors: [[\"cdk-virtual-scroll-viewport\", \"itemSize\", \"\"]],\n inputs: {\n itemSize: \"itemSize\",\n minBufferPx: \"minBufferPx\",\n maxBufferPx: \"maxBufferPx\"\n },\n standalone: true,\n features: [i0.ɵɵProvidersFeature([{\n provide: VIRTUAL_SCROLL_STRATEGY,\n useFactory: _fixedSizeVirtualScrollStrategyFactory,\n deps: [forwardRef(() => CdkFixedSizeVirtualScroll)]\n }]), i0.ɵɵNgOnChangesFeature]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkFixedSizeVirtualScroll, [{\n type: Directive,\n args: [{\n selector: 'cdk-virtual-scroll-viewport[itemSize]',\n standalone: true,\n providers: [{\n provide: VIRTUAL_SCROLL_STRATEGY,\n useFactory: _fixedSizeVirtualScrollStrategyFactory,\n deps: [forwardRef(() => CdkFixedSizeVirtualScroll)]\n }]\n }]\n }], null, {\n itemSize: [{\n type: Input\n }],\n minBufferPx: [{\n type: Input\n }],\n maxBufferPx: [{\n type: Input\n }]\n });\n})();\n\n/** Time in ms to throttle the scrolling events by default. */\nconst DEFAULT_SCROLL_TIME = 20;\n/**\n * Service contained all registered Scrollable references and emits an event when any one of the\n * Scrollable references emit a scrolled event.\n */\nclass ScrollDispatcher {\n constructor(_ngZone, _platform, document) {\n this._ngZone = _ngZone;\n this._platform = _platform;\n /** Subject for notifying that a registered scrollable reference element has been scrolled. */\n this._scrolled = new Subject();\n /** Keeps track of the global `scroll` and `resize` subscriptions. */\n this._globalSubscription = null;\n /** Keeps track of the amount of subscriptions to `scrolled`. Used for cleaning up afterwards. */\n this._scrolledCount = 0;\n /**\n * Map of all the scrollable references that are registered with the service and their\n * scroll event subscriptions.\n */\n this.scrollContainers = new Map();\n this._document = document;\n }\n /**\n * Registers a scrollable instance with the service and listens for its scrolled events. When the\n * scrollable is scrolled, the service emits the event to its scrolled observable.\n * @param scrollable Scrollable instance to be registered.\n */\n register(scrollable) {\n if (!this.scrollContainers.has(scrollable)) {\n this.scrollContainers.set(scrollable, scrollable.elementScrolled().subscribe(() => this._scrolled.next(scrollable)));\n }\n }\n /**\n * De-registers a Scrollable reference and unsubscribes from its scroll event observable.\n * @param scrollable Scrollable instance to be deregistered.\n */\n deregister(scrollable) {\n const scrollableReference = this.scrollContainers.get(scrollable);\n if (scrollableReference) {\n scrollableReference.unsubscribe();\n this.scrollContainers.delete(scrollable);\n }\n }\n /**\n * Returns an observable that emits an event whenever any of the registered Scrollable\n * references (or window, document, or body) fire a scrolled event. Can provide a time in ms\n * to override the default \"throttle\" time.\n *\n * **Note:** in order to avoid hitting change detection for every scroll event,\n * all of the events emitted from this stream will be run outside the Angular zone.\n * If you need to update any data bindings as a result of a scroll event, you have\n * to run the callback using `NgZone.run`.\n */\n scrolled(auditTimeInMs = DEFAULT_SCROLL_TIME) {\n if (!this._platform.isBrowser) {\n return of();\n }\n return new Observable(observer => {\n if (!this._globalSubscription) {\n this._addGlobalListener();\n }\n // In the case of a 0ms delay, use an observable without auditTime\n // since it does add a perceptible delay in processing overhead.\n const subscription = auditTimeInMs > 0 ? this._scrolled.pipe(auditTime(auditTimeInMs)).subscribe(observer) : this._scrolled.subscribe(observer);\n this._scrolledCount++;\n return () => {\n subscription.unsubscribe();\n this._scrolledCount--;\n if (!this._scrolledCount) {\n this._removeGlobalListener();\n }\n };\n });\n }\n ngOnDestroy() {\n this._removeGlobalListener();\n this.scrollContainers.forEach((_, container) => this.deregister(container));\n this._scrolled.complete();\n }\n /**\n * Returns an observable that emits whenever any of the\n * scrollable ancestors of an element are scrolled.\n * @param elementOrElementRef Element whose ancestors to listen for.\n * @param auditTimeInMs Time to throttle the scroll events.\n */\n ancestorScrolled(elementOrElementRef, auditTimeInMs) {\n const ancestors = this.getAncestorScrollContainers(elementOrElementRef);\n return this.scrolled(auditTimeInMs).pipe(filter(target => {\n return !target || ancestors.indexOf(target) > -1;\n }));\n }\n /** Returns all registered Scrollables that contain the provided element. */\n getAncestorScrollContainers(elementOrElementRef) {\n const scrollingContainers = [];\n this.scrollContainers.forEach((_subscription, scrollable) => {\n if (this._scrollableContainsElement(scrollable, elementOrElementRef)) {\n scrollingContainers.push(scrollable);\n }\n });\n return scrollingContainers;\n }\n /** Use defaultView of injected document if available or fallback to global window reference */\n _getWindow() {\n return this._document.defaultView || window;\n }\n /** Returns true if the element is contained within the provided Scrollable. */\n _scrollableContainsElement(scrollable, elementOrElementRef) {\n let element = coerceElement(elementOrElementRef);\n let scrollableElement = scrollable.getElementRef().nativeElement;\n // Traverse through the element parents until we reach null, checking if any of the elements\n // are the scrollable's element.\n do {\n if (element == scrollableElement) {\n return true;\n }\n } while (element = element.parentElement);\n return false;\n }\n /** Sets up the global scroll listeners. */\n _addGlobalListener() {\n this._globalSubscription = this._ngZone.runOutsideAngular(() => {\n const window = this._getWindow();\n return fromEvent(window.document, 'scroll').subscribe(() => this._scrolled.next());\n });\n }\n /** Cleans up the global scroll listener. */\n _removeGlobalListener() {\n if (this._globalSubscription) {\n this._globalSubscription.unsubscribe();\n this._globalSubscription = null;\n }\n }\n static {\n this.ɵfac = function ScrollDispatcher_Factory(ɵt) {\n return new (ɵt || ScrollDispatcher)(i0.ɵɵinject(i0.NgZone), i0.ɵɵinject(i1.Platform), i0.ɵɵinject(DOCUMENT, 8));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: ScrollDispatcher,\n factory: ScrollDispatcher.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(ScrollDispatcher, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: i0.NgZone\n }, {\n type: i1.Platform\n }, {\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [DOCUMENT]\n }]\n }];\n }, null);\n})();\n\n/**\n * Sends an event when the directive's element is scrolled. Registers itself with the\n * ScrollDispatcher service to include itself as part of its collection of scrolling events that it\n * can be listened to through the service.\n */\nclass CdkScrollable {\n constructor(elementRef, scrollDispatcher, ngZone, dir) {\n this.elementRef = elementRef;\n this.scrollDispatcher = scrollDispatcher;\n this.ngZone = ngZone;\n this.dir = dir;\n this._destroyed = new Subject();\n this._elementScrolled = new Observable(observer => this.ngZone.runOutsideAngular(() => fromEvent(this.elementRef.nativeElement, 'scroll').pipe(takeUntil(this._destroyed)).subscribe(observer)));\n }\n ngOnInit() {\n this.scrollDispatcher.register(this);\n }\n ngOnDestroy() {\n this.scrollDispatcher.deregister(this);\n this._destroyed.next();\n this._destroyed.complete();\n }\n /** Returns observable that emits when a scroll event is fired on the host element. */\n elementScrolled() {\n return this._elementScrolled;\n }\n /** Gets the ElementRef for the viewport. */\n getElementRef() {\n return this.elementRef;\n }\n /**\n * Scrolls to the specified offsets. This is a normalized version of the browser's native scrollTo\n * method, since browsers are not consistent about what scrollLeft means in RTL. For this method\n * left and right always refer to the left and right side of the scrolling container irrespective\n * of the layout direction. start and end refer to left and right in an LTR context and vice-versa\n * in an RTL context.\n * @param options specified the offsets to scroll to.\n */\n scrollTo(options) {\n const el = this.elementRef.nativeElement;\n const isRtl = this.dir && this.dir.value == 'rtl';\n // Rewrite start & end offsets as right or left offsets.\n if (options.left == null) {\n options.left = isRtl ? options.end : options.start;\n }\n if (options.right == null) {\n options.right = isRtl ? options.start : options.end;\n }\n // Rewrite the bottom offset as a top offset.\n if (options.bottom != null) {\n options.top = el.scrollHeight - el.clientHeight - options.bottom;\n }\n // Rewrite the right offset as a left offset.\n if (isRtl && getRtlScrollAxisType() != 0 /* RtlScrollAxisType.NORMAL */) {\n if (options.left != null) {\n options.right = el.scrollWidth - el.clientWidth - options.left;\n }\n if (getRtlScrollAxisType() == 2 /* RtlScrollAxisType.INVERTED */) {\n options.left = options.right;\n } else if (getRtlScrollAxisType() == 1 /* RtlScrollAxisType.NEGATED */) {\n options.left = options.right ? -options.right : options.right;\n }\n } else {\n if (options.right != null) {\n options.left = el.scrollWidth - el.clientWidth - options.right;\n }\n }\n this._applyScrollToOptions(options);\n }\n _applyScrollToOptions(options) {\n const el = this.elementRef.nativeElement;\n if (supportsScrollBehavior()) {\n el.scrollTo(options);\n } else {\n if (options.top != null) {\n el.scrollTop = options.top;\n }\n if (options.left != null) {\n el.scrollLeft = options.left;\n }\n }\n }\n /**\n * Measures the scroll offset relative to the specified edge of the viewport. This method can be\n * used instead of directly checking scrollLeft or scrollTop, since browsers are not consistent\n * about what scrollLeft means in RTL. The values returned by this method are normalized such that\n * left and right always refer to the left and right side of the scrolling container irrespective\n * of the layout direction. start and end refer to left and right in an LTR context and vice-versa\n * in an RTL context.\n * @param from The edge to measure from.\n */\n measureScrollOffset(from) {\n const LEFT = 'left';\n const RIGHT = 'right';\n const el = this.elementRef.nativeElement;\n if (from == 'top') {\n return el.scrollTop;\n }\n if (from == 'bottom') {\n return el.scrollHeight - el.clientHeight - el.scrollTop;\n }\n // Rewrite start & end as left or right offsets.\n const isRtl = this.dir && this.dir.value == 'rtl';\n if (from == 'start') {\n from = isRtl ? RIGHT : LEFT;\n } else if (from == 'end') {\n from = isRtl ? LEFT : RIGHT;\n }\n if (isRtl && getRtlScrollAxisType() == 2 /* RtlScrollAxisType.INVERTED */) {\n // For INVERTED, scrollLeft is (scrollWidth - clientWidth) when scrolled all the way left and\n // 0 when scrolled all the way right.\n if (from == LEFT) {\n return el.scrollWidth - el.clientWidth - el.scrollLeft;\n } else {\n return el.scrollLeft;\n }\n } else if (isRtl && getRtlScrollAxisType() == 1 /* RtlScrollAxisType.NEGATED */) {\n // For NEGATED, scrollLeft is -(scrollWidth - clientWidth) when scrolled all the way left and\n // 0 when scrolled all the way right.\n if (from == LEFT) {\n return el.scrollLeft + el.scrollWidth - el.clientWidth;\n } else {\n return -el.scrollLeft;\n }\n } else {\n // For NORMAL, as well as non-RTL contexts, scrollLeft is 0 when scrolled all the way left and\n // (scrollWidth - clientWidth) when scrolled all the way right.\n if (from == LEFT) {\n return el.scrollLeft;\n } else {\n return el.scrollWidth - el.clientWidth - el.scrollLeft;\n }\n }\n }\n static {\n this.ɵfac = function CdkScrollable_Factory(ɵt) {\n return new (ɵt || CdkScrollable)(i0.ɵɵdirectiveInject(i0.ElementRef), i0.ɵɵdirectiveInject(ScrollDispatcher), i0.ɵɵdirectiveInject(i0.NgZone), i0.ɵɵdirectiveInject(i2.Directionality, 8));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkScrollable,\n selectors: [[\"\", \"cdk-scrollable\", \"\"], [\"\", \"cdkScrollable\", \"\"]],\n standalone: true\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkScrollable, [{\n type: Directive,\n args: [{\n selector: '[cdk-scrollable], [cdkScrollable]',\n standalone: true\n }]\n }], function () {\n return [{\n type: i0.ElementRef\n }, {\n type: ScrollDispatcher\n }, {\n type: i0.NgZone\n }, {\n type: i2.Directionality,\n decorators: [{\n type: Optional\n }]\n }];\n }, null);\n})();\n\n/** Time in ms to throttle the resize events by default. */\nconst DEFAULT_RESIZE_TIME = 20;\n/**\n * Simple utility for getting the bounds of the browser viewport.\n * @docs-private\n */\nclass ViewportRuler {\n constructor(_platform, ngZone, document) {\n this._platform = _platform;\n /** Stream of viewport change events. */\n this._change = new Subject();\n /** Event listener that will be used to handle the viewport change events. */\n this._changeListener = event => {\n this._change.next(event);\n };\n this._document = document;\n ngZone.runOutsideAngular(() => {\n if (_platform.isBrowser) {\n const window = this._getWindow();\n // Note that bind the events ourselves, rather than going through something like RxJS's\n // `fromEvent` so that we can ensure that they're bound outside of the NgZone.\n window.addEventListener('resize', this._changeListener);\n window.addEventListener('orientationchange', this._changeListener);\n }\n // Clear the cached position so that the viewport is re-measured next time it is required.\n // We don't need to keep track of the subscription, because it is completed on destroy.\n this.change().subscribe(() => this._viewportSize = null);\n });\n }\n ngOnDestroy() {\n if (this._platform.isBrowser) {\n const window = this._getWindow();\n window.removeEventListener('resize', this._changeListener);\n window.removeEventListener('orientationchange', this._changeListener);\n }\n this._change.complete();\n }\n /** Returns the viewport's width and height. */\n getViewportSize() {\n if (!this._viewportSize) {\n this._updateViewportSize();\n }\n const output = {\n width: this._viewportSize.width,\n height: this._viewportSize.height\n };\n // If we're not on a browser, don't cache the size since it'll be mocked out anyway.\n if (!this._platform.isBrowser) {\n this._viewportSize = null;\n }\n return output;\n }\n /** Gets a ClientRect for the viewport's bounds. */\n getViewportRect() {\n // Use the document element's bounding rect rather than the window scroll properties\n // (e.g. pageYOffset, scrollY) due to in issue in Chrome and IE where window scroll\n // properties and client coordinates (boundingClientRect, clientX/Y, etc.) are in different\n // conceptual viewports. Under most circumstances these viewports are equivalent, but they\n // can disagree when the page is pinch-zoomed (on devices that support touch).\n // See https://bugs.chromium.org/p/chromium/issues/detail?id=489206#c4\n // We use the documentElement instead of the body because, by default (without a css reset)\n // browsers typically give the document body an 8px margin, which is not included in\n // getBoundingClientRect().\n const scrollPosition = this.getViewportScrollPosition();\n const {\n width,\n height\n } = this.getViewportSize();\n return {\n top: scrollPosition.top,\n left: scrollPosition.left,\n bottom: scrollPosition.top + height,\n right: scrollPosition.left + width,\n height,\n width\n };\n }\n /** Gets the (top, left) scroll position of the viewport. */\n getViewportScrollPosition() {\n // While we can get a reference to the fake document\n // during SSR, it doesn't have getBoundingClientRect.\n if (!this._platform.isBrowser) {\n return {\n top: 0,\n left: 0\n };\n }\n // The top-left-corner of the viewport is determined by the scroll position of the document\n // body, normally just (scrollLeft, scrollTop). However, Chrome and Firefox disagree about\n // whether `document.body` or `document.documentElement` is the scrolled element, so reading\n // `scrollTop` and `scrollLeft` is inconsistent. However, using the bounding rect of\n // `document.documentElement` works consistently, where the `top` and `left` values will\n // equal negative the scroll position.\n const document = this._document;\n const window = this._getWindow();\n const documentElement = document.documentElement;\n const documentRect = documentElement.getBoundingClientRect();\n const top = -documentRect.top || document.body.scrollTop || window.scrollY || documentElement.scrollTop || 0;\n const left = -documentRect.left || document.body.scrollLeft || window.scrollX || documentElement.scrollLeft || 0;\n return {\n top,\n left\n };\n }\n /**\n * Returns a stream that emits whenever the size of the viewport changes.\n * This stream emits outside of the Angular zone.\n * @param throttleTime Time in milliseconds to throttle the stream.\n */\n change(throttleTime = DEFAULT_RESIZE_TIME) {\n return throttleTime > 0 ? this._change.pipe(auditTime(throttleTime)) : this._change;\n }\n /** Use defaultView of injected document if available or fallback to global window reference */\n _getWindow() {\n return this._document.defaultView || window;\n }\n /** Updates the cached viewport size. */\n _updateViewportSize() {\n const window = this._getWindow();\n this._viewportSize = this._platform.isBrowser ? {\n width: window.innerWidth,\n height: window.innerHeight\n } : {\n width: 0,\n height: 0\n };\n }\n static {\n this.ɵfac = function ViewportRuler_Factory(ɵt) {\n return new (ɵt || ViewportRuler)(i0.ɵɵinject(i1.Platform), i0.ɵɵinject(i0.NgZone), i0.ɵɵinject(DOCUMENT, 8));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: ViewportRuler,\n factory: ViewportRuler.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(ViewportRuler, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: i1.Platform\n }, {\n type: i0.NgZone\n }, {\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [DOCUMENT]\n }]\n }];\n }, null);\n})();\nconst VIRTUAL_SCROLLABLE = new InjectionToken('VIRTUAL_SCROLLABLE');\n/**\n * Extending the {@link CdkScrollable} to be used as scrolling container for virtual scrolling.\n */\nclass CdkVirtualScrollable extends CdkScrollable {\n constructor(elementRef, scrollDispatcher, ngZone, dir) {\n super(elementRef, scrollDispatcher, ngZone, dir);\n }\n /**\n * Measure the viewport size for the provided orientation.\n *\n * @param orientation The orientation to measure the size from.\n */\n measureViewportSize(orientation) {\n const viewportEl = this.elementRef.nativeElement;\n return orientation === 'horizontal' ? viewportEl.clientWidth : viewportEl.clientHeight;\n }\n static {\n this.ɵfac = function CdkVirtualScrollable_Factory(ɵt) {\n return new (ɵt || CdkVirtualScrollable)(i0.ɵɵdirectiveInject(i0.ElementRef), i0.ɵɵdirectiveInject(ScrollDispatcher), i0.ɵɵdirectiveInject(i0.NgZone), i0.ɵɵdirectiveInject(i2.Directionality, 8));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkVirtualScrollable,\n features: [i0.ɵɵInheritDefinitionFeature]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkVirtualScrollable, [{\n type: Directive\n }], function () {\n return [{\n type: i0.ElementRef\n }, {\n type: ScrollDispatcher\n }, {\n type: i0.NgZone\n }, {\n type: i2.Directionality,\n decorators: [{\n type: Optional\n }]\n }];\n }, null);\n})();\n\n/** Checks if the given ranges are equal. */\nfunction rangesEqual(r1, r2) {\n return r1.start == r2.start && r1.end == r2.end;\n}\n/**\n * Scheduler to be used for scroll events. Needs to fall back to\n * something that doesn't rely on requestAnimationFrame on environments\n * that don't support it (e.g. server-side rendering).\n */\nconst SCROLL_SCHEDULER = typeof requestAnimationFrame !== 'undefined' ? animationFrameScheduler : asapScheduler;\n/** A viewport that virtualizes its scrolling with the help of `CdkVirtualForOf`. */\nclass CdkVirtualScrollViewport extends CdkVirtualScrollable {\n /** The direction the viewport scrolls. */\n get orientation() {\n return this._orientation;\n }\n set orientation(orientation) {\n if (this._orientation !== orientation) {\n this._orientation = orientation;\n this._calculateSpacerSize();\n }\n }\n /**\n * Whether rendered items should persist in the DOM after scrolling out of view. By default, items\n * will be removed.\n */\n get appendOnly() {\n return this._appendOnly;\n }\n set appendOnly(value) {\n this._appendOnly = coerceBooleanProperty(value);\n }\n constructor(elementRef, _changeDetectorRef, ngZone, _scrollStrategy, dir, scrollDispatcher, viewportRuler, scrollable) {\n super(elementRef, scrollDispatcher, ngZone, dir);\n this.elementRef = elementRef;\n this._changeDetectorRef = _changeDetectorRef;\n this._scrollStrategy = _scrollStrategy;\n this.scrollable = scrollable;\n this._platform = inject(Platform);\n /** Emits when the viewport is detached from a CdkVirtualForOf. */\n this._detachedSubject = new Subject();\n /** Emits when the rendered range changes. */\n this._renderedRangeSubject = new Subject();\n this._orientation = 'vertical';\n this._appendOnly = false;\n // Note: we don't use the typical EventEmitter here because we need to subscribe to the scroll\n // strategy lazily (i.e. only if the user is actually listening to the events). We do this because\n // depending on how the strategy calculates the scrolled index, it may come at a cost to\n // performance.\n /** Emits when the index of the first element visible in the viewport changes. */\n this.scrolledIndexChange = new Observable(observer => this._scrollStrategy.scrolledIndexChange.subscribe(index => Promise.resolve().then(() => this.ngZone.run(() => observer.next(index)))));\n /** A stream that emits whenever the rendered range changes. */\n this.renderedRangeStream = this._renderedRangeSubject;\n /**\n * The total size of all content (in pixels), including content that is not currently rendered.\n */\n this._totalContentSize = 0;\n /** A string representing the `style.width` property value to be used for the spacer element. */\n this._totalContentWidth = '';\n /** A string representing the `style.height` property value to be used for the spacer element. */\n this._totalContentHeight = '';\n /** The currently rendered range of indices. */\n this._renderedRange = {\n start: 0,\n end: 0\n };\n /** The length of the data bound to this viewport (in number of items). */\n this._dataLength = 0;\n /** The size of the viewport (in pixels). */\n this._viewportSize = 0;\n /** The last rendered content offset that was set. */\n this._renderedContentOffset = 0;\n /**\n * Whether the last rendered content offset was to the end of the content (and therefore needs to\n * be rewritten as an offset to the start of the content).\n */\n this._renderedContentOffsetNeedsRewrite = false;\n /** Whether there is a pending change detection cycle. */\n this._isChangeDetectionPending = false;\n /** A list of functions to run after the next change detection cycle. */\n this._runAfterChangeDetection = [];\n /** Subscription to changes in the viewport size. */\n this._viewportChanges = Subscription.EMPTY;\n if (!_scrollStrategy && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw Error('Error: cdk-virtual-scroll-viewport requires the \"itemSize\" property to be set.');\n }\n this._viewportChanges = viewportRuler.change().subscribe(() => {\n this.checkViewportSize();\n });\n if (!this.scrollable) {\n // No scrollable is provided, so the virtual-scroll-viewport needs to become a scrollable\n this.elementRef.nativeElement.classList.add('cdk-virtual-scrollable');\n this.scrollable = this;\n }\n }\n ngOnInit() {\n // Scrolling depends on the element dimensions which we can't get during SSR.\n if (!this._platform.isBrowser) {\n return;\n }\n if (this.scrollable === this) {\n super.ngOnInit();\n }\n // It's still too early to measure the viewport at this point. Deferring with a promise allows\n // the Viewport to be rendered with the correct size before we measure. We run this outside the\n // zone to avoid causing more change detection cycles. We handle the change detection loop\n // ourselves instead.\n this.ngZone.runOutsideAngular(() => Promise.resolve().then(() => {\n this._measureViewportSize();\n this._scrollStrategy.attach(this);\n this.scrollable.elementScrolled().pipe(\n // Start off with a fake scroll event so we properly detect our initial position.\n startWith(null),\n // Collect multiple events into one until the next animation frame. This way if\n // there are multiple scroll events in the same frame we only need to recheck\n // our layout once.\n auditTime(0, SCROLL_SCHEDULER),\n // Usually `elementScrolled` is completed when the scrollable is destroyed, but\n // that may not be the case if a `CdkVirtualScrollableElement` is used so we have\n // to unsubscribe here just in case.\n takeUntil(this._destroyed)).subscribe(() => this._scrollStrategy.onContentScrolled());\n this._markChangeDetectionNeeded();\n }));\n }\n ngOnDestroy() {\n this.detach();\n this._scrollStrategy.detach();\n // Complete all subjects\n this._renderedRangeSubject.complete();\n this._detachedSubject.complete();\n this._viewportChanges.unsubscribe();\n super.ngOnDestroy();\n }\n /** Attaches a `CdkVirtualScrollRepeater` to this viewport. */\n attach(forOf) {\n if (this._forOf && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw Error('CdkVirtualScrollViewport is already attached.');\n }\n // Subscribe to the data stream of the CdkVirtualForOf to keep track of when the data length\n // changes. Run outside the zone to avoid triggering change detection, since we're managing the\n // change detection loop ourselves.\n this.ngZone.runOutsideAngular(() => {\n this._forOf = forOf;\n this._forOf.dataStream.pipe(takeUntil(this._detachedSubject)).subscribe(data => {\n const newLength = data.length;\n if (newLength !== this._dataLength) {\n this._dataLength = newLength;\n this._scrollStrategy.onDataLengthChanged();\n }\n this._doChangeDetection();\n });\n });\n }\n /** Detaches the current `CdkVirtualForOf`. */\n detach() {\n this._forOf = null;\n this._detachedSubject.next();\n }\n /** Gets the length of the data bound to this viewport (in number of items). */\n getDataLength() {\n return this._dataLength;\n }\n /** Gets the size of the viewport (in pixels). */\n getViewportSize() {\n return this._viewportSize;\n }\n // TODO(mmalerba): This is technically out of sync with what's really rendered until a render\n // cycle happens. I'm being careful to only call it after the render cycle is complete and before\n // setting it to something else, but its error prone and should probably be split into\n // `pendingRange` and `renderedRange`, the latter reflecting whats actually in the DOM.\n /** Get the current rendered range of items. */\n getRenderedRange() {\n return this._renderedRange;\n }\n measureBoundingClientRectWithScrollOffset(from) {\n return this.getElementRef().nativeElement.getBoundingClientRect()[from];\n }\n /**\n * Sets the total size of all content (in pixels), including content that is not currently\n * rendered.\n */\n setTotalContentSize(size) {\n if (this._totalContentSize !== size) {\n this._totalContentSize = size;\n this._calculateSpacerSize();\n this._markChangeDetectionNeeded();\n }\n }\n /** Sets the currently rendered range of indices. */\n setRenderedRange(range) {\n if (!rangesEqual(this._renderedRange, range)) {\n if (this.appendOnly) {\n range = {\n start: 0,\n end: Math.max(this._renderedRange.end, range.end)\n };\n }\n this._renderedRangeSubject.next(this._renderedRange = range);\n this._markChangeDetectionNeeded(() => this._scrollStrategy.onContentRendered());\n }\n }\n /**\n * Gets the offset from the start of the viewport to the start of the rendered data (in pixels).\n */\n getOffsetToRenderedContentStart() {\n return this._renderedContentOffsetNeedsRewrite ? null : this._renderedContentOffset;\n }\n /**\n * Sets the offset from the start of the viewport to either the start or end of the rendered data\n * (in pixels).\n */\n setRenderedContentOffset(offset, to = 'to-start') {\n // In appendOnly, we always start from the top\n offset = this.appendOnly && to === 'to-start' ? 0 : offset;\n // For a horizontal viewport in a right-to-left language we need to translate along the x-axis\n // in the negative direction.\n const isRtl = this.dir && this.dir.value == 'rtl';\n const isHorizontal = this.orientation == 'horizontal';\n const axis = isHorizontal ? 'X' : 'Y';\n const axisDirection = isHorizontal && isRtl ? -1 : 1;\n let transform = `translate${axis}(${Number(axisDirection * offset)}px)`;\n this._renderedContentOffset = offset;\n if (to === 'to-end') {\n transform += ` translate${axis}(-100%)`;\n // The viewport should rewrite this as a `to-start` offset on the next render cycle. Otherwise\n // elements will appear to expand in the wrong direction (e.g. `mat-expansion-panel` would\n // expand upward).\n this._renderedContentOffsetNeedsRewrite = true;\n }\n if (this._renderedContentTransform != transform) {\n // We know this value is safe because we parse `offset` with `Number()` before passing it\n // into the string.\n this._renderedContentTransform = transform;\n this._markChangeDetectionNeeded(() => {\n if (this._renderedContentOffsetNeedsRewrite) {\n this._renderedContentOffset -= this.measureRenderedContentSize();\n this._renderedContentOffsetNeedsRewrite = false;\n this.setRenderedContentOffset(this._renderedContentOffset);\n } else {\n this._scrollStrategy.onRenderedOffsetChanged();\n }\n });\n }\n }\n /**\n * Scrolls to the given offset from the start of the viewport. Please note that this is not always\n * the same as setting `scrollTop` or `scrollLeft`. In a horizontal viewport with right-to-left\n * direction, this would be the equivalent of setting a fictional `scrollRight` property.\n * @param offset The offset to scroll to.\n * @param behavior The ScrollBehavior to use when scrolling. Default is behavior is `auto`.\n */\n scrollToOffset(offset, behavior = 'auto') {\n const options = {\n behavior\n };\n if (this.orientation === 'horizontal') {\n options.start = offset;\n } else {\n options.top = offset;\n }\n this.scrollable.scrollTo(options);\n }\n /**\n * Scrolls to the offset for the given index.\n * @param index The index of the element to scroll to.\n * @param behavior The ScrollBehavior to use when scrolling. Default is behavior is `auto`.\n */\n scrollToIndex(index, behavior = 'auto') {\n this._scrollStrategy.scrollToIndex(index, behavior);\n }\n /**\n * Gets the current scroll offset from the start of the scrollable (in pixels).\n * @param from The edge to measure the offset from. Defaults to 'top' in vertical mode and 'start'\n * in horizontal mode.\n */\n measureScrollOffset(from) {\n // This is to break the call cycle\n let measureScrollOffset;\n if (this.scrollable == this) {\n measureScrollOffset = _from => super.measureScrollOffset(_from);\n } else {\n measureScrollOffset = _from => this.scrollable.measureScrollOffset(_from);\n }\n return Math.max(0, measureScrollOffset(from ?? (this.orientation === 'horizontal' ? 'start' : 'top')) - this.measureViewportOffset());\n }\n /**\n * Measures the offset of the viewport from the scrolling container\n * @param from The edge to measure from.\n */\n measureViewportOffset(from) {\n let fromRect;\n const LEFT = 'left';\n const RIGHT = 'right';\n const isRtl = this.dir?.value == 'rtl';\n if (from == 'start') {\n fromRect = isRtl ? RIGHT : LEFT;\n } else if (from == 'end') {\n fromRect = isRtl ? LEFT : RIGHT;\n } else if (from) {\n fromRect = from;\n } else {\n fromRect = this.orientation === 'horizontal' ? 'left' : 'top';\n }\n const scrollerClientRect = this.scrollable.measureBoundingClientRectWithScrollOffset(fromRect);\n const viewportClientRect = this.elementRef.nativeElement.getBoundingClientRect()[fromRect];\n return viewportClientRect - scrollerClientRect;\n }\n /** Measure the combined size of all of the rendered items. */\n measureRenderedContentSize() {\n const contentEl = this._contentWrapper.nativeElement;\n return this.orientation === 'horizontal' ? contentEl.offsetWidth : contentEl.offsetHeight;\n }\n /**\n * Measure the total combined size of the given range. Throws if the range includes items that are\n * not rendered.\n */\n measureRangeSize(range) {\n if (!this._forOf) {\n return 0;\n }\n return this._forOf.measureRangeSize(range, this.orientation);\n }\n /** Update the viewport dimensions and re-render. */\n checkViewportSize() {\n // TODO: Cleanup later when add logic for handling content resize\n this._measureViewportSize();\n this._scrollStrategy.onDataLengthChanged();\n }\n /** Measure the viewport size. */\n _measureViewportSize() {\n this._viewportSize = this.scrollable.measureViewportSize(this.orientation);\n }\n /** Queue up change detection to run. */\n _markChangeDetectionNeeded(runAfter) {\n if (runAfter) {\n this._runAfterChangeDetection.push(runAfter);\n }\n // Use a Promise to batch together calls to `_doChangeDetection`. This way if we set a bunch of\n // properties sequentially we only have to run `_doChangeDetection` once at the end.\n if (!this._isChangeDetectionPending) {\n this._isChangeDetectionPending = true;\n this.ngZone.runOutsideAngular(() => Promise.resolve().then(() => {\n this._doChangeDetection();\n }));\n }\n }\n /** Run change detection. */\n _doChangeDetection() {\n this._isChangeDetectionPending = false;\n // Apply the content transform. The transform can't be set via an Angular binding because\n // bypassSecurityTrustStyle is banned in Google. However the value is safe, it's composed of\n // string literals, a variable that can only be 'X' or 'Y', and user input that is run through\n // the `Number` function first to coerce it to a numeric value.\n this._contentWrapper.nativeElement.style.transform = this._renderedContentTransform;\n // Apply changes to Angular bindings. Note: We must call `markForCheck` to run change detection\n // from the root, since the repeated items are content projected in. Calling `detectChanges`\n // instead does not properly check the projected content.\n this.ngZone.run(() => this._changeDetectorRef.markForCheck());\n const runAfterChangeDetection = this._runAfterChangeDetection;\n this._runAfterChangeDetection = [];\n for (const fn of runAfterChangeDetection) {\n fn();\n }\n }\n /** Calculates the `style.width` and `style.height` for the spacer element. */\n _calculateSpacerSize() {\n this._totalContentHeight = this.orientation === 'horizontal' ? '' : `${this._totalContentSize}px`;\n this._totalContentWidth = this.orientation === 'horizontal' ? `${this._totalContentSize}px` : '';\n }\n static {\n this.ɵfac = function CdkVirtualScrollViewport_Factory(ɵt) {\n return new (ɵt || CdkVirtualScrollViewport)(i0.ɵɵdirectiveInject(i0.ElementRef), i0.ɵɵdirectiveInject(i0.ChangeDetectorRef), i0.ɵɵdirectiveInject(i0.NgZone), i0.ɵɵdirectiveInject(VIRTUAL_SCROLL_STRATEGY, 8), i0.ɵɵdirectiveInject(i2.Directionality, 8), i0.ɵɵdirectiveInject(ScrollDispatcher), i0.ɵɵdirectiveInject(ViewportRuler), i0.ɵɵdirectiveInject(VIRTUAL_SCROLLABLE, 8));\n };\n }\n static {\n this.ɵcmp = /* @__PURE__ */i0.ɵɵdefineComponent({\n type: CdkVirtualScrollViewport,\n selectors: [[\"cdk-virtual-scroll-viewport\"]],\n viewQuery: function CdkVirtualScrollViewport_Query(rf, ctx) {\n if (rf & 1) {\n i0.ɵɵviewQuery(_c0, 7);\n }\n if (rf & 2) {\n let _t;\n i0.ɵɵqueryRefresh(_t = i0.ɵɵloadQuery()) && (ctx._contentWrapper = _t.first);\n }\n },\n hostAttrs: [1, \"cdk-virtual-scroll-viewport\"],\n hostVars: 4,\n hostBindings: function CdkVirtualScrollViewport_HostBindings(rf, ctx) {\n if (rf & 2) {\n i0.ɵɵclassProp(\"cdk-virtual-scroll-orientation-horizontal\", ctx.orientation === \"horizontal\")(\"cdk-virtual-scroll-orientation-vertical\", ctx.orientation !== \"horizontal\");\n }\n },\n inputs: {\n orientation: \"orientation\",\n appendOnly: \"appendOnly\"\n },\n outputs: {\n scrolledIndexChange: \"scrolledIndexChange\"\n },\n standalone: true,\n features: [i0.ɵɵProvidersFeature([{\n provide: CdkScrollable,\n useFactory: (virtualScrollable, viewport) => virtualScrollable || viewport,\n deps: [[new Optional(), new Inject(VIRTUAL_SCROLLABLE)], CdkVirtualScrollViewport]\n }]), i0.ɵɵInheritDefinitionFeature, i0.ɵɵStandaloneFeature],\n ngContentSelectors: _c1,\n decls: 4,\n vars: 4,\n consts: [[\"contentWrapper\", \"\"], [1, \"cdk-virtual-scroll-content-wrapper\"], [1, \"cdk-virtual-scroll-spacer\"]],\n template: function CdkVirtualScrollViewport_Template(rf, ctx) {\n if (rf & 1) {\n i0.ɵɵprojectionDef();\n i0.ɵɵelementStart(0, \"div\", 1, 0);\n i0.ɵɵprojection(2);\n i0.ɵɵelementEnd();\n i0.ɵɵelement(3, \"div\", 2);\n }\n if (rf & 2) {\n i0.ɵɵadvance(3);\n i0.ɵɵstyleProp(\"width\", ctx._totalContentWidth)(\"height\", ctx._totalContentHeight);\n }\n },\n styles: [\"cdk-virtual-scroll-viewport{display:block;position:relative;transform:translateZ(0)}.cdk-virtual-scrollable{overflow:auto;will-change:scroll-position;contain:strict;-webkit-overflow-scrolling:touch}.cdk-virtual-scroll-content-wrapper{position:absolute;top:0;left:0;contain:content}[dir=rtl] .cdk-virtual-scroll-content-wrapper{right:0;left:auto}.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper{min-height:100%}.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>dl:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>ol:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>table:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>ul:not([cdkVirtualFor]){padding-left:0;padding-right:0;margin-left:0;margin-right:0;border-left-width:0;border-right-width:0;outline:none}.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper{min-width:100%}.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>dl:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>ol:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>table:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>ul:not([cdkVirtualFor]){padding-top:0;padding-bottom:0;margin-top:0;margin-bottom:0;border-top-width:0;border-bottom-width:0;outline:none}.cdk-virtual-scroll-spacer{height:1px;transform-origin:0 0;flex:0 0 auto}[dir=rtl] .cdk-virtual-scroll-spacer{transform-origin:100% 0}\"],\n encapsulation: 2,\n changeDetection: 0\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkVirtualScrollViewport, [{\n type: Component,\n args: [{\n selector: 'cdk-virtual-scroll-viewport',\n host: {\n 'class': 'cdk-virtual-scroll-viewport',\n '[class.cdk-virtual-scroll-orientation-horizontal]': 'orientation === \"horizontal\"',\n '[class.cdk-virtual-scroll-orientation-vertical]': 'orientation !== \"horizontal\"'\n },\n encapsulation: ViewEncapsulation.None,\n changeDetection: ChangeDetectionStrategy.OnPush,\n standalone: true,\n providers: [{\n provide: CdkScrollable,\n useFactory: (virtualScrollable, viewport) => virtualScrollable || viewport,\n deps: [[new Optional(), new Inject(VIRTUAL_SCROLLABLE)], CdkVirtualScrollViewport]\n }],\n template: \"\\n
\\n \\n
\\n\\n
\\n\",\n styles: [\"cdk-virtual-scroll-viewport{display:block;position:relative;transform:translateZ(0)}.cdk-virtual-scrollable{overflow:auto;will-change:scroll-position;contain:strict;-webkit-overflow-scrolling:touch}.cdk-virtual-scroll-content-wrapper{position:absolute;top:0;left:0;contain:content}[dir=rtl] .cdk-virtual-scroll-content-wrapper{right:0;left:auto}.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper{min-height:100%}.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>dl:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>ol:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>table:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-horizontal .cdk-virtual-scroll-content-wrapper>ul:not([cdkVirtualFor]){padding-left:0;padding-right:0;margin-left:0;margin-right:0;border-left-width:0;border-right-width:0;outline:none}.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper{min-width:100%}.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>dl:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>ol:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>table:not([cdkVirtualFor]),.cdk-virtual-scroll-orientation-vertical .cdk-virtual-scroll-content-wrapper>ul:not([cdkVirtualFor]){padding-top:0;padding-bottom:0;margin-top:0;margin-bottom:0;border-top-width:0;border-bottom-width:0;outline:none}.cdk-virtual-scroll-spacer{height:1px;transform-origin:0 0;flex:0 0 auto}[dir=rtl] .cdk-virtual-scroll-spacer{transform-origin:100% 0}\"]\n }]\n }], function () {\n return [{\n type: i0.ElementRef\n }, {\n type: i0.ChangeDetectorRef\n }, {\n type: i0.NgZone\n }, {\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [VIRTUAL_SCROLL_STRATEGY]\n }]\n }, {\n type: i2.Directionality,\n decorators: [{\n type: Optional\n }]\n }, {\n type: ScrollDispatcher\n }, {\n type: ViewportRuler\n }, {\n type: CdkVirtualScrollable,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [VIRTUAL_SCROLLABLE]\n }]\n }];\n }, {\n orientation: [{\n type: Input\n }],\n appendOnly: [{\n type: Input\n }],\n scrolledIndexChange: [{\n type: Output\n }],\n _contentWrapper: [{\n type: ViewChild,\n args: ['contentWrapper', {\n static: true\n }]\n }]\n });\n})();\n\n/** Helper to extract the offset of a DOM Node in a certain direction. */\nfunction getOffset(orientation, direction, node) {\n const el = node;\n if (!el.getBoundingClientRect) {\n return 0;\n }\n const rect = el.getBoundingClientRect();\n if (orientation === 'horizontal') {\n return direction === 'start' ? rect.left : rect.right;\n }\n return direction === 'start' ? rect.top : rect.bottom;\n}\n/**\n * A directive similar to `ngForOf` to be used for rendering data inside a virtual scrolling\n * container.\n */\nclass CdkVirtualForOf {\n /** The DataSource to display. */\n get cdkVirtualForOf() {\n return this._cdkVirtualForOf;\n }\n set cdkVirtualForOf(value) {\n this._cdkVirtualForOf = value;\n if (isDataSource(value)) {\n this._dataSourceChanges.next(value);\n } else {\n // If value is an an NgIterable, convert it to an array.\n this._dataSourceChanges.next(new ArrayDataSource(isObservable(value) ? value : Array.from(value || [])));\n }\n }\n /**\n * The `TrackByFunction` to use for tracking changes. The `TrackByFunction` takes the index and\n * the item and produces a value to be used as the item's identity when tracking changes.\n */\n get cdkVirtualForTrackBy() {\n return this._cdkVirtualForTrackBy;\n }\n set cdkVirtualForTrackBy(fn) {\n this._needsUpdate = true;\n this._cdkVirtualForTrackBy = fn ? (index, item) => fn(index + (this._renderedRange ? this._renderedRange.start : 0), item) : undefined;\n }\n /** The template used to stamp out new elements. */\n set cdkVirtualForTemplate(value) {\n if (value) {\n this._needsUpdate = true;\n this._template = value;\n }\n }\n /**\n * The size of the cache used to store templates that are not being used for re-use later.\n * Setting the cache size to `0` will disable caching. Defaults to 20 templates.\n */\n get cdkVirtualForTemplateCacheSize() {\n return this._viewRepeater.viewCacheSize;\n }\n set cdkVirtualForTemplateCacheSize(size) {\n this._viewRepeater.viewCacheSize = coerceNumberProperty(size);\n }\n constructor( /** The view container to add items to. */\n _viewContainerRef, /** The template to use when stamping out new items. */\n _template, /** The set of available differs. */\n _differs, /** The strategy used to render items in the virtual scroll viewport. */\n _viewRepeater, /** The virtual scrolling viewport that these items are being rendered in. */\n _viewport, ngZone) {\n this._viewContainerRef = _viewContainerRef;\n this._template = _template;\n this._differs = _differs;\n this._viewRepeater = _viewRepeater;\n this._viewport = _viewport;\n /** Emits when the rendered view of the data changes. */\n this.viewChange = new Subject();\n /** Subject that emits when a new DataSource instance is given. */\n this._dataSourceChanges = new Subject();\n /** Emits whenever the data in the current DataSource changes. */\n this.dataStream = this._dataSourceChanges.pipe(\n // Start off with null `DataSource`.\n startWith(null),\n // Bundle up the previous and current data sources so we can work with both.\n pairwise(),\n // Use `_changeDataSource` to disconnect from the previous data source and connect to the\n // new one, passing back a stream of data changes which we run through `switchMap` to give\n // us a data stream that emits the latest data from whatever the current `DataSource` is.\n switchMap(([prev, cur]) => this._changeDataSource(prev, cur)),\n // Replay the last emitted data when someone subscribes.\n shareReplay(1));\n /** The differ used to calculate changes to the data. */\n this._differ = null;\n /** Whether the rendered data should be updated during the next ngDoCheck cycle. */\n this._needsUpdate = false;\n this._destroyed = new Subject();\n this.dataStream.subscribe(data => {\n this._data = data;\n this._onRenderedDataChange();\n });\n this._viewport.renderedRangeStream.pipe(takeUntil(this._destroyed)).subscribe(range => {\n this._renderedRange = range;\n if (this.viewChange.observers.length) {\n ngZone.run(() => this.viewChange.next(this._renderedRange));\n }\n this._onRenderedDataChange();\n });\n this._viewport.attach(this);\n }\n /**\n * Measures the combined size (width for horizontal orientation, height for vertical) of all items\n * in the specified range. Throws an error if the range includes items that are not currently\n * rendered.\n */\n measureRangeSize(range, orientation) {\n if (range.start >= range.end) {\n return 0;\n }\n if ((range.start < this._renderedRange.start || range.end > this._renderedRange.end) && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw Error(`Error: attempted to measure an item that isn't rendered.`);\n }\n // The index into the list of rendered views for the first item in the range.\n const renderedStartIndex = range.start - this._renderedRange.start;\n // The length of the range we're measuring.\n const rangeLen = range.end - range.start;\n // Loop over all the views, find the first and land node and compute the size by subtracting\n // the top of the first node from the bottom of the last one.\n let firstNode;\n let lastNode;\n // Find the first node by starting from the beginning and going forwards.\n for (let i = 0; i < rangeLen; i++) {\n const view = this._viewContainerRef.get(i + renderedStartIndex);\n if (view && view.rootNodes.length) {\n firstNode = lastNode = view.rootNodes[0];\n break;\n }\n }\n // Find the last node by starting from the end and going backwards.\n for (let i = rangeLen - 1; i > -1; i--) {\n const view = this._viewContainerRef.get(i + renderedStartIndex);\n if (view && view.rootNodes.length) {\n lastNode = view.rootNodes[view.rootNodes.length - 1];\n break;\n }\n }\n return firstNode && lastNode ? getOffset(orientation, 'end', lastNode) - getOffset(orientation, 'start', firstNode) : 0;\n }\n ngDoCheck() {\n if (this._differ && this._needsUpdate) {\n // TODO(mmalerba): We should differentiate needs update due to scrolling and a new portion of\n // this list being rendered (can use simpler algorithm) vs needs update due to data actually\n // changing (need to do this diff).\n const changes = this._differ.diff(this._renderedItems);\n if (!changes) {\n this._updateContext();\n } else {\n this._applyChanges(changes);\n }\n this._needsUpdate = false;\n }\n }\n ngOnDestroy() {\n this._viewport.detach();\n this._dataSourceChanges.next(undefined);\n this._dataSourceChanges.complete();\n this.viewChange.complete();\n this._destroyed.next();\n this._destroyed.complete();\n this._viewRepeater.detach();\n }\n /** React to scroll state changes in the viewport. */\n _onRenderedDataChange() {\n if (!this._renderedRange) {\n return;\n }\n this._renderedItems = this._data.slice(this._renderedRange.start, this._renderedRange.end);\n if (!this._differ) {\n // Use a wrapper function for the `trackBy` so any new values are\n // picked up automatically without having to recreate the differ.\n this._differ = this._differs.find(this._renderedItems).create((index, item) => {\n return this.cdkVirtualForTrackBy ? this.cdkVirtualForTrackBy(index, item) : item;\n });\n }\n this._needsUpdate = true;\n }\n /** Swap out one `DataSource` for another. */\n _changeDataSource(oldDs, newDs) {\n if (oldDs) {\n oldDs.disconnect(this);\n }\n this._needsUpdate = true;\n return newDs ? newDs.connect(this) : of();\n }\n /** Update the `CdkVirtualForOfContext` for all views. */\n _updateContext() {\n const count = this._data.length;\n let i = this._viewContainerRef.length;\n while (i--) {\n const view = this._viewContainerRef.get(i);\n view.context.index = this._renderedRange.start + i;\n view.context.count = count;\n this._updateComputedContextProperties(view.context);\n view.detectChanges();\n }\n }\n /** Apply changes to the DOM. */\n _applyChanges(changes) {\n this._viewRepeater.applyChanges(changes, this._viewContainerRef, (record, _adjustedPreviousIndex, currentIndex) => this._getEmbeddedViewArgs(record, currentIndex), record => record.item);\n // Update $implicit for any items that had an identity change.\n changes.forEachIdentityChange(record => {\n const view = this._viewContainerRef.get(record.currentIndex);\n view.context.$implicit = record.item;\n });\n // Update the context variables on all items.\n const count = this._data.length;\n let i = this._viewContainerRef.length;\n while (i--) {\n const view = this._viewContainerRef.get(i);\n view.context.index = this._renderedRange.start + i;\n view.context.count = count;\n this._updateComputedContextProperties(view.context);\n }\n }\n /** Update the computed properties on the `CdkVirtualForOfContext`. */\n _updateComputedContextProperties(context) {\n context.first = context.index === 0;\n context.last = context.index === context.count - 1;\n context.even = context.index % 2 === 0;\n context.odd = !context.even;\n }\n _getEmbeddedViewArgs(record, index) {\n // Note that it's important that we insert the item directly at the proper index,\n // rather than inserting it and the moving it in place, because if there's a directive\n // on the same node that injects the `ViewContainerRef`, Angular will insert another\n // comment node which can throw off the move when it's being repeated for all items.\n return {\n templateRef: this._template,\n context: {\n $implicit: record.item,\n // It's guaranteed that the iterable is not \"undefined\" or \"null\" because we only\n // generate views for elements if the \"cdkVirtualForOf\" iterable has elements.\n cdkVirtualForOf: this._cdkVirtualForOf,\n index: -1,\n count: -1,\n first: false,\n last: false,\n odd: false,\n even: false\n },\n index\n };\n }\n static {\n this.ɵfac = function CdkVirtualForOf_Factory(ɵt) {\n return new (ɵt || CdkVirtualForOf)(i0.ɵɵdirectiveInject(i0.ViewContainerRef), i0.ɵɵdirectiveInject(i0.TemplateRef), i0.ɵɵdirectiveInject(i0.IterableDiffers), i0.ɵɵdirectiveInject(_VIEW_REPEATER_STRATEGY), i0.ɵɵdirectiveInject(CdkVirtualScrollViewport, 4), i0.ɵɵdirectiveInject(i0.NgZone));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkVirtualForOf,\n selectors: [[\"\", \"cdkVirtualFor\", \"\", \"cdkVirtualForOf\", \"\"]],\n inputs: {\n cdkVirtualForOf: \"cdkVirtualForOf\",\n cdkVirtualForTrackBy: \"cdkVirtualForTrackBy\",\n cdkVirtualForTemplate: \"cdkVirtualForTemplate\",\n cdkVirtualForTemplateCacheSize: \"cdkVirtualForTemplateCacheSize\"\n },\n standalone: true,\n features: [i0.ɵɵProvidersFeature([{\n provide: _VIEW_REPEATER_STRATEGY,\n useClass: _RecycleViewRepeaterStrategy\n }])]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkVirtualForOf, [{\n type: Directive,\n args: [{\n selector: '[cdkVirtualFor][cdkVirtualForOf]',\n providers: [{\n provide: _VIEW_REPEATER_STRATEGY,\n useClass: _RecycleViewRepeaterStrategy\n }],\n standalone: true\n }]\n }], function () {\n return [{\n type: i0.ViewContainerRef\n }, {\n type: i0.TemplateRef\n }, {\n type: i0.IterableDiffers\n }, {\n type: i2$1._RecycleViewRepeaterStrategy,\n decorators: [{\n type: Inject,\n args: [_VIEW_REPEATER_STRATEGY]\n }]\n }, {\n type: CdkVirtualScrollViewport,\n decorators: [{\n type: SkipSelf\n }]\n }, {\n type: i0.NgZone\n }];\n }, {\n cdkVirtualForOf: [{\n type: Input\n }],\n cdkVirtualForTrackBy: [{\n type: Input\n }],\n cdkVirtualForTemplate: [{\n type: Input\n }],\n cdkVirtualForTemplateCacheSize: [{\n type: Input\n }]\n });\n})();\n\n/**\n * Provides a virtual scrollable for the element it is attached to.\n */\nclass CdkVirtualScrollableElement extends CdkVirtualScrollable {\n constructor(elementRef, scrollDispatcher, ngZone, dir) {\n super(elementRef, scrollDispatcher, ngZone, dir);\n }\n measureBoundingClientRectWithScrollOffset(from) {\n return this.getElementRef().nativeElement.getBoundingClientRect()[from] - this.measureScrollOffset(from);\n }\n static {\n this.ɵfac = function CdkVirtualScrollableElement_Factory(ɵt) {\n return new (ɵt || CdkVirtualScrollableElement)(i0.ɵɵdirectiveInject(i0.ElementRef), i0.ɵɵdirectiveInject(ScrollDispatcher), i0.ɵɵdirectiveInject(i0.NgZone), i0.ɵɵdirectiveInject(i2.Directionality, 8));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkVirtualScrollableElement,\n selectors: [[\"\", \"cdkVirtualScrollingElement\", \"\"]],\n hostAttrs: [1, \"cdk-virtual-scrollable\"],\n standalone: true,\n features: [i0.ɵɵProvidersFeature([{\n provide: VIRTUAL_SCROLLABLE,\n useExisting: CdkVirtualScrollableElement\n }]), i0.ɵɵInheritDefinitionFeature]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkVirtualScrollableElement, [{\n type: Directive,\n args: [{\n selector: '[cdkVirtualScrollingElement]',\n providers: [{\n provide: VIRTUAL_SCROLLABLE,\n useExisting: CdkVirtualScrollableElement\n }],\n standalone: true,\n host: {\n 'class': 'cdk-virtual-scrollable'\n }\n }]\n }], function () {\n return [{\n type: i0.ElementRef\n }, {\n type: ScrollDispatcher\n }, {\n type: i0.NgZone\n }, {\n type: i2.Directionality,\n decorators: [{\n type: Optional\n }]\n }];\n }, null);\n})();\n\n/**\n * Provides as virtual scrollable for the global / window scrollbar.\n */\nclass CdkVirtualScrollableWindow extends CdkVirtualScrollable {\n constructor(scrollDispatcher, ngZone, dir) {\n super(new ElementRef(document.documentElement), scrollDispatcher, ngZone, dir);\n this._elementScrolled = new Observable(observer => this.ngZone.runOutsideAngular(() => fromEvent(document, 'scroll').pipe(takeUntil(this._destroyed)).subscribe(observer)));\n }\n measureBoundingClientRectWithScrollOffset(from) {\n return this.getElementRef().nativeElement.getBoundingClientRect()[from];\n }\n static {\n this.ɵfac = function CdkVirtualScrollableWindow_Factory(ɵt) {\n return new (ɵt || CdkVirtualScrollableWindow)(i0.ɵɵdirectiveInject(ScrollDispatcher), i0.ɵɵdirectiveInject(i0.NgZone), i0.ɵɵdirectiveInject(i2.Directionality, 8));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkVirtualScrollableWindow,\n selectors: [[\"cdk-virtual-scroll-viewport\", \"scrollWindow\", \"\"]],\n standalone: true,\n features: [i0.ɵɵProvidersFeature([{\n provide: VIRTUAL_SCROLLABLE,\n useExisting: CdkVirtualScrollableWindow\n }]), i0.ɵɵInheritDefinitionFeature]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkVirtualScrollableWindow, [{\n type: Directive,\n args: [{\n selector: 'cdk-virtual-scroll-viewport[scrollWindow]',\n providers: [{\n provide: VIRTUAL_SCROLLABLE,\n useExisting: CdkVirtualScrollableWindow\n }],\n standalone: true\n }]\n }], function () {\n return [{\n type: ScrollDispatcher\n }, {\n type: i0.NgZone\n }, {\n type: i2.Directionality,\n decorators: [{\n type: Optional\n }]\n }];\n }, null);\n})();\nclass CdkScrollableModule {\n static {\n this.ɵfac = function CdkScrollableModule_Factory(ɵt) {\n return new (ɵt || CdkScrollableModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: CdkScrollableModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({});\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkScrollableModule, [{\n type: NgModule,\n args: [{\n exports: [CdkScrollable],\n imports: [CdkScrollable]\n }]\n }], null, null);\n})();\n/**\n * @docs-primary-export\n */\nclass ScrollingModule {\n static {\n this.ɵfac = function ScrollingModule_Factory(ɵt) {\n return new (ɵt || ScrollingModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: ScrollingModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n imports: [BidiModule, CdkScrollableModule, BidiModule, CdkScrollableModule]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(ScrollingModule, [{\n type: NgModule,\n args: [{\n imports: [BidiModule, CdkScrollableModule, CdkVirtualScrollViewport, CdkFixedSizeVirtualScroll, CdkVirtualForOf, CdkVirtualScrollableWindow, CdkVirtualScrollableElement],\n exports: [BidiModule, CdkScrollableModule, CdkFixedSizeVirtualScroll, CdkVirtualForOf, CdkVirtualScrollViewport, CdkVirtualScrollableWindow, CdkVirtualScrollableElement]\n }]\n }], null, null);\n})();\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { CdkFixedSizeVirtualScroll, CdkScrollable, CdkScrollableModule, CdkVirtualForOf, CdkVirtualScrollViewport, CdkVirtualScrollable, CdkVirtualScrollableElement, CdkVirtualScrollableWindow, DEFAULT_RESIZE_TIME, DEFAULT_SCROLL_TIME, FixedSizeVirtualScrollStrategy, ScrollDispatcher, ScrollingModule, VIRTUAL_SCROLLABLE, VIRTUAL_SCROLL_STRATEGY, ViewportRuler, _fixedSizeVirtualScrollStrategyFactory };\n","import * as i0 from '@angular/core';\nimport { ElementRef, Injector, Directive, EventEmitter, Inject, Output, NgModule } from '@angular/core';\nimport { DOCUMENT } from '@angular/common';\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 ' + '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 * 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 } 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, projectableNodes) {\n super();\n this.component = component;\n this.viewContainerRef = viewContainerRef;\n this.injector = injector;\n this.componentFactoryResolver = componentFactoryResolver;\n this.projectableNodes = projectableNodes;\n }\n}\n/**\n * A `TemplatePortal` is a portal that represents some embedded template (TemplateRef).\n */\nclass TemplatePortal extends Portal {\n constructor( /** The embedded template that will be used to instantiate an embedded View in the host. */\n templateRef, /** Reference to the ViewContainer into which the template will be stamped out. */\n viewContainerRef, /** Contextual data to be passed in to the embedded view. */\n context, /** The injector to use for the embedded view. */\n injector) {\n super();\n this.templateRef = templateRef;\n this.viewContainerRef = viewContainerRef;\n this.context = context;\n this.injector = injector;\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 } 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 } 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 * A PortalOutlet for attaching portals to an arbitrary DOM element outside of the Angular\n * application context.\n */\nclass DomPortalOutlet extends BasePortalOutlet {\n /**\n * @param outletElement Element into which the content is projected.\n * @param _componentFactoryResolver Used to resolve the component factory.\n * Only required when attaching component portals.\n * @param _appRef Reference to the application. Only used in component portals when there\n * is no `ViewContainerRef` available.\n * @param _defaultInjector Injector to use as a fallback when the portal being attached doesn't\n * have one. Only used for component portals.\n * @param _document Reference to the document. Used when attaching a DOM portal. Will eventually\n * become a required parameter.\n */\n constructor( /** 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 if ((typeof ngDevMode === 'undefined' || ngDevMode) && !resolver) {\n throw Error('Cannot attach component portal to outlet without a ComponentFactoryResolver.');\n }\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, portal.projectableNodes || undefined);\n this.setDisposeFn(() => componentRef.destroy());\n } else {\n if ((typeof ngDevMode === 'undefined' || ngDevMode) && !this._appRef) {\n throw Error('Cannot attach component portal to outlet without an ApplicationRef.');\n }\n componentRef = componentFactory.create(portal.injector || this._defaultInjector || Injector.NULL);\n this._appRef.attachView(componentRef.hostView);\n this.setDisposeFn(() => {\n // Verify that the ApplicationRef has registered views before trying to detach a host view.\n // This check also protects the `detachView` from being called on a destroyed ApplicationRef.\n if (this._appRef.viewCount > 0) {\n this._appRef.detachView(componentRef.hostView);\n }\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 injector: portal.injector\n });\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 * 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 static {\n this.ɵfac = function CdkPortal_Factory(ɵt) {\n return new (ɵt || CdkPortal)(i0.ɵɵdirectiveInject(i0.TemplateRef), i0.ɵɵdirectiveInject(i0.ViewContainerRef));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkPortal,\n selectors: [[\"\", \"cdkPortal\", \"\"]],\n exportAs: [\"cdkPortal\"],\n features: [i0.ɵɵInheritDefinitionFeature]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkPortal, [{\n type: Directive,\n args: [{\n selector: '[cdkPortal]',\n exportAs: 'cdkPortal'\n }]\n }], function () {\n return [{\n type: i0.TemplateRef\n }, {\n type: i0.ViewContainerRef\n }];\n }, null);\n})();\n/**\n * @deprecated Use `CdkPortal` instead.\n * @breaking-change 9.0.0\n */\nclass TemplatePortalDirective extends CdkPortal {\n static {\n this.ɵfac = /* @__PURE__ */(() => {\n let ɵTemplatePortalDirective_BaseFactory;\n return function TemplatePortalDirective_Factory(ɵt) {\n return (ɵTemplatePortalDirective_BaseFactory || (ɵTemplatePortalDirective_BaseFactory = i0.ɵɵgetInheritedFactory(TemplatePortalDirective)))(ɵt || TemplatePortalDirective);\n };\n })();\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: TemplatePortalDirective,\n selectors: [[\"\", \"cdk-portal\", \"\"], [\"\", \"portal\", \"\"]],\n exportAs: [\"cdkPortal\"],\n features: [i0.ɵɵProvidersFeature([{\n provide: CdkPortal,\n useExisting: TemplatePortalDirective\n }]), i0.ɵɵInheritDefinitionFeature]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(TemplatePortalDirective, [{\n type: Directive,\n args: [{\n selector: '[cdk-portal], [portal]',\n exportAs: 'cdkPortal',\n providers: [{\n provide: CdkPortal,\n useExisting: TemplatePortalDirective\n }]\n }]\n }], null, null);\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 * ``\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 `
`\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 || null;\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._attachedRef = this._attachedPortal = 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, portal.projectableNodes || undefined);\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 injector: portal.injector\n });\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 ? nativeElement : nativeElement.parentNode;\n }\n static {\n this.ɵfac = function CdkPortalOutlet_Factory(ɵt) {\n return new (ɵt || CdkPortalOutlet)(i0.ɵɵdirectiveInject(i0.ComponentFactoryResolver), i0.ɵɵdirectiveInject(i0.ViewContainerRef), i0.ɵɵdirectiveInject(DOCUMENT));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkPortalOutlet,\n selectors: [[\"\", \"cdkPortalOutlet\", \"\"]],\n inputs: {\n portal: [0, \"cdkPortalOutlet\", \"portal\"]\n },\n outputs: {\n attached: \"attached\"\n },\n exportAs: [\"cdkPortalOutlet\"],\n features: [i0.ɵɵInheritDefinitionFeature]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkPortalOutlet, [{\n type: Directive,\n args: [{\n selector: '[cdkPortalOutlet]',\n exportAs: 'cdkPortalOutlet',\n inputs: ['portal: cdkPortalOutlet']\n }]\n }], function () {\n return [{\n type: i0.ComponentFactoryResolver\n }, {\n type: i0.ViewContainerRef\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }];\n }, {\n attached: [{\n type: Output\n }]\n });\n})();\n/**\n * @deprecated Use `CdkPortalOutlet` instead.\n * @breaking-change 9.0.0\n */\nclass PortalHostDirective extends CdkPortalOutlet {\n static {\n this.ɵfac = /* @__PURE__ */(() => {\n let ɵPortalHostDirective_BaseFactory;\n return function PortalHostDirective_Factory(ɵt) {\n return (ɵPortalHostDirective_BaseFactory || (ɵPortalHostDirective_BaseFactory = i0.ɵɵgetInheritedFactory(PortalHostDirective)))(ɵt || PortalHostDirective);\n };\n })();\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: PortalHostDirective,\n selectors: [[\"\", \"cdkPortalHost\", \"\"], [\"\", \"portalHost\", \"\"]],\n inputs: {\n portal: [0, \"cdkPortalHost\", \"portal\"]\n },\n exportAs: [\"cdkPortalHost\"],\n features: [i0.ɵɵProvidersFeature([{\n provide: CdkPortalOutlet,\n useExisting: PortalHostDirective\n }]), i0.ɵɵInheritDefinitionFeature]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(PortalHostDirective, [{\n type: Directive,\n args: [{\n selector: '[cdkPortalHost], [portalHost]',\n exportAs: 'cdkPortalHost',\n inputs: ['portal: cdkPortalHost'],\n providers: [{\n provide: CdkPortalOutlet,\n useExisting: PortalHostDirective\n }]\n }]\n }], null, null);\n})();\nclass PortalModule {\n static {\n this.ɵfac = function PortalModule_Factory(ɵt) {\n return new (ɵt || PortalModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: PortalModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({});\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(PortalModule, [{\n type: NgModule,\n args: [{\n exports: [CdkPortal, CdkPortalOutlet, TemplatePortalDirective, PortalHostDirective],\n declarations: [CdkPortal, CdkPortalOutlet, TemplatePortalDirective, PortalHostDirective]\n }]\n }], null, null);\n})();\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 * Generated bundle index. Do not edit.\n */\n\nexport { BasePortalHost, BasePortalOutlet, CdkPortal, CdkPortalOutlet, ComponentPortal, DomPortal, DomPortalHost, DomPortalOutlet, Portal, PortalHostDirective, PortalInjector, PortalModule, TemplatePortal, TemplatePortalDirective };\n","const MAC_ENTER = 3;\nconst BACKSPACE = 8;\nconst TAB = 9;\nconst NUM_CENTER = 12;\nconst ENTER = 13;\nconst SHIFT = 16;\nconst CONTROL = 17;\nconst ALT = 18;\nconst PAUSE = 19;\nconst CAPS_LOCK = 20;\nconst ESCAPE = 27;\nconst SPACE = 32;\nconst PAGE_UP = 33;\nconst PAGE_DOWN = 34;\nconst END = 35;\nconst HOME = 36;\nconst LEFT_ARROW = 37;\nconst UP_ARROW = 38;\nconst RIGHT_ARROW = 39;\nconst DOWN_ARROW = 40;\nconst PLUS_SIGN = 43;\nconst PRINT_SCREEN = 44;\nconst INSERT = 45;\nconst DELETE = 46;\nconst ZERO = 48;\nconst ONE = 49;\nconst TWO = 50;\nconst THREE = 51;\nconst FOUR = 52;\nconst FIVE = 53;\nconst SIX = 54;\nconst SEVEN = 55;\nconst EIGHT = 56;\nconst NINE = 57;\nconst FF_SEMICOLON = 59; // Firefox (Gecko) fires this for semicolon instead of 186\nconst FF_EQUALS = 61; // Firefox (Gecko) fires this for equals instead of 187\nconst QUESTION_MARK = 63;\nconst AT_SIGN = 64;\nconst A = 65;\nconst B = 66;\nconst C = 67;\nconst D = 68;\nconst E = 69;\nconst F = 70;\nconst G = 71;\nconst H = 72;\nconst I = 73;\nconst J = 74;\nconst K = 75;\nconst L = 76;\nconst M = 77;\nconst N = 78;\nconst O = 79;\nconst P = 80;\nconst Q = 81;\nconst R = 82;\nconst S = 83;\nconst T = 84;\nconst U = 85;\nconst V = 86;\nconst W = 87;\nconst X = 88;\nconst Y = 89;\nconst Z = 90;\nconst META = 91; // WIN_KEY_LEFT\nconst MAC_WK_CMD_LEFT = 91;\nconst MAC_WK_CMD_RIGHT = 93;\nconst CONTEXT_MENU = 93;\nconst NUMPAD_ZERO = 96;\nconst NUMPAD_ONE = 97;\nconst NUMPAD_TWO = 98;\nconst NUMPAD_THREE = 99;\nconst NUMPAD_FOUR = 100;\nconst NUMPAD_FIVE = 101;\nconst NUMPAD_SIX = 102;\nconst NUMPAD_SEVEN = 103;\nconst NUMPAD_EIGHT = 104;\nconst NUMPAD_NINE = 105;\nconst NUMPAD_MULTIPLY = 106;\nconst NUMPAD_PLUS = 107;\nconst NUMPAD_MINUS = 109;\nconst NUMPAD_PERIOD = 110;\nconst NUMPAD_DIVIDE = 111;\nconst F1 = 112;\nconst F2 = 113;\nconst F3 = 114;\nconst F4 = 115;\nconst F5 = 116;\nconst F6 = 117;\nconst F7 = 118;\nconst F8 = 119;\nconst F9 = 120;\nconst F10 = 121;\nconst F11 = 122;\nconst F12 = 123;\nconst NUM_LOCK = 144;\nconst SCROLL_LOCK = 145;\nconst FIRST_MEDIA = 166;\nconst FF_MINUS = 173;\nconst MUTE = 173; // Firefox (Gecko) fires 181 for MUTE\nconst VOLUME_DOWN = 174; // Firefox (Gecko) fires 182 for VOLUME_DOWN\nconst VOLUME_UP = 175; // Firefox (Gecko) fires 183 for VOLUME_UP\nconst FF_MUTE = 181;\nconst FF_VOLUME_DOWN = 182;\nconst LAST_MEDIA = 183;\nconst FF_VOLUME_UP = 183;\nconst SEMICOLON = 186; // Firefox (Gecko) fires 59 for SEMICOLON\nconst EQUALS = 187; // Firefox (Gecko) fires 61 for EQUALS\nconst COMMA = 188;\nconst DASH = 189; // Firefox (Gecko) fires 173 for DASH/MINUS\nconst PERIOD = 190;\nconst SLASH = 191;\nconst APOSTROPHE = 192;\nconst TILDE = 192;\nconst OPEN_SQUARE_BRACKET = 219;\nconst BACKSLASH = 220;\nconst CLOSE_SQUARE_BRACKET = 221;\nconst SINGLE_QUOTE = 222;\nconst MAC_META = 224;\n\n/**\n * Checks whether a modifier key is pressed.\n * @param event Event to be checked.\n */\nfunction hasModifierKey(event, ...modifiers) {\n if (modifiers.length) {\n return modifiers.some(modifier => event[modifier]);\n }\n return event.altKey || event.shiftKey || event.ctrlKey || event.metaKey;\n}\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { A, ALT, APOSTROPHE, AT_SIGN, B, BACKSLASH, BACKSPACE, C, CAPS_LOCK, CLOSE_SQUARE_BRACKET, COMMA, CONTEXT_MENU, CONTROL, D, DASH, DELETE, DOWN_ARROW, E, EIGHT, END, ENTER, EQUALS, ESCAPE, F, F1, F10, F11, F12, F2, F3, F4, F5, F6, F7, F8, F9, FF_EQUALS, FF_MINUS, FF_MUTE, FF_SEMICOLON, FF_VOLUME_DOWN, FF_VOLUME_UP, FIRST_MEDIA, FIVE, FOUR, G, H, HOME, I, INSERT, J, K, L, LAST_MEDIA, LEFT_ARROW, M, MAC_ENTER, MAC_META, MAC_WK_CMD_LEFT, MAC_WK_CMD_RIGHT, META, MUTE, N, NINE, NUMPAD_DIVIDE, NUMPAD_EIGHT, NUMPAD_FIVE, NUMPAD_FOUR, NUMPAD_MINUS, NUMPAD_MULTIPLY, NUMPAD_NINE, NUMPAD_ONE, NUMPAD_PERIOD, NUMPAD_PLUS, NUMPAD_SEVEN, NUMPAD_SIX, NUMPAD_THREE, NUMPAD_TWO, NUMPAD_ZERO, NUM_CENTER, NUM_LOCK, O, ONE, OPEN_SQUARE_BRACKET, P, PAGE_DOWN, PAGE_UP, PAUSE, PERIOD, PLUS_SIGN, PRINT_SCREEN, Q, QUESTION_MARK, R, RIGHT_ARROW, S, SCROLL_LOCK, SEMICOLON, SEVEN, SHIFT, SINGLE_QUOTE, SIX, SLASH, SPACE, T, TAB, THREE, TILDE, TWO, U, UP_ARROW, V, VOLUME_DOWN, VOLUME_UP, W, X, Y, Z, ZERO, hasModifierKey };\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, Optional, ElementRef, ApplicationRef, ANIMATION_MODULE_TYPE, InjectionToken, Directive, EventEmitter, Input, Output, NgModule } from '@angular/core';\nimport { coerceCssPixelValue, coerceArray, coerceBooleanProperty } from '@angular/cdk/coercion';\nimport * as i1$1 from '@angular/cdk/platform';\nimport { supportsScrollBehavior, _getEventTarget, _isTestEnvironment } from '@angular/cdk/platform';\nimport { filter, take, takeUntil, takeWhile } from 'rxjs/operators';\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 { ESCAPE, hasModifierKey } from '@angular/cdk/keycodes';\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 = {\n top: '',\n left: ''\n };\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 * 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).pipe(filter(scrollable => {\n return !scrollable || !this._overlayRef.overlayElement.contains(scrollable.getElementRef().nativeElement);\n }));\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 } else {\n this._overlayRef.updatePosition();\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/** 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 * 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 * 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 {\n width,\n height\n } = 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 = [{\n width,\n height,\n bottom: height,\n right: width,\n top: 0,\n left: 0\n }];\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 static {\n this.ɵfac = function ScrollStrategyOptions_Factory(ɵt) {\n return new (ɵt || ScrollStrategyOptions)(i0.ɵɵinject(i1.ScrollDispatcher), i0.ɵɵinject(i1.ViewportRuler), i0.ɵɵinject(i0.NgZone), i0.ɵɵinject(DOCUMENT));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: ScrollStrategyOptions,\n factory: ScrollStrategyOptions.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(ScrollStrategyOptions, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: i1.ScrollDispatcher\n }, {\n type: i1.ViewportRuler\n }, {\n type: i0.NgZone\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }];\n }, null);\n})();\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 possible 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/** The points of the origin element and the overlay element to connect. */\nclass ConnectionPositionPair {\n constructor(origin, overlay, /** Offset along the X axis. */\n offsetX, /** Offset along the Y axis. */\n offsetY, /** 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/** The change event emitted by the strategy when a fallback position is used. */\nclass ConnectedOverlayPositionChange {\n constructor( /** The position used as a result of this change. */\n connectionPair, /** @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}\". ` + `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}\". ` + `Expected \"start\", \"end\" or \"center\".`);\n }\n}\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 static {\n this.ɵfac = function BaseOverlayDispatcher_Factory(ɵt) {\n return new (ɵt || BaseOverlayDispatcher)(i0.ɵɵinject(DOCUMENT));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: BaseOverlayDispatcher,\n factory: BaseOverlayDispatcher.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(BaseOverlayDispatcher, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }];\n }, null);\n})();\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, /** @breaking-change 14.0.0 _ngZone will be required. */\n _ngZone) {\n super(document);\n this._ngZone = _ngZone;\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 const keydownEvents = overlays[i]._keydownEvents;\n /** @breaking-change 14.0.0 _ngZone will be required. */\n if (this._ngZone) {\n this._ngZone.run(() => keydownEvents.next(event));\n } else {\n keydownEvents.next(event);\n }\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 /** @breaking-change 14.0.0 _ngZone will be required. */\n if (this._ngZone) {\n this._ngZone.runOutsideAngular(() => this._document.body.addEventListener('keydown', this._keydownListener));\n } else {\n this._document.body.addEventListener('keydown', this._keydownListener);\n }\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 static {\n this.ɵfac = function OverlayKeyboardDispatcher_Factory(ɵt) {\n return new (ɵt || OverlayKeyboardDispatcher)(i0.ɵɵinject(DOCUMENT), i0.ɵɵinject(i0.NgZone, 8));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: OverlayKeyboardDispatcher,\n factory: OverlayKeyboardDispatcher.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(OverlayKeyboardDispatcher, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: i0.NgZone,\n decorators: [{\n type: Optional\n }]\n }];\n }, null);\n})();\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, /** @breaking-change 14.0.0 _ngZone will be required. */\n _ngZone) {\n super(document);\n this._platform = _platform;\n this._ngZone = _ngZone;\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 ? 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) || overlayRef.overlayElement.contains(origin)) {\n break;\n }\n const outsidePointerEvents = overlayRef._outsidePointerEvents;\n /** @breaking-change 14.0.0 _ngZone will be required. */\n if (this._ngZone) {\n this._ngZone.run(() => outsidePointerEvents.next(event));\n } else {\n outsidePointerEvents.next(event);\n }\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 /** @breaking-change 14.0.0 _ngZone will be required. */\n if (this._ngZone) {\n this._ngZone.runOutsideAngular(() => this._addEventListeners(body));\n } else {\n this._addEventListeners(body);\n }\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 _addEventListeners(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 }\n static {\n this.ɵfac = function OverlayOutsideClickDispatcher_Factory(ɵt) {\n return new (ɵt || OverlayOutsideClickDispatcher)(i0.ɵɵinject(DOCUMENT), i0.ɵɵinject(i1$1.Platform), i0.ɵɵinject(i0.NgZone, 8));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: OverlayOutsideClickDispatcher,\n factory: OverlayOutsideClickDispatcher.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(OverlayOutsideClickDispatcher, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: i1$1.Platform\n }, {\n type: i0.NgZone,\n decorators: [{\n type: Optional\n }]\n }];\n }, null);\n})();\n\n/** Container inside which all overlays will render. */\nclass OverlayContainer {\n constructor(document, _platform) {\n this._platform = _platform;\n this._document = document;\n }\n ngOnDestroy() {\n this._containerElement?.remove();\n }\n /**\n * This method returns the overlay container element. It will lazily\n * create the element the first time it is called to facilitate using\n * the container in non-browser environments.\n * @returns the container element\n */\n getContainerElement() {\n if (!this._containerElement) {\n this._createContainer();\n }\n return this._containerElement;\n }\n /**\n * Create the overlay container element, which is simply a div\n * with the 'cdk-overlay-container' class on the document body.\n */\n _createContainer() {\n const containerClass = 'cdk-overlay-container';\n // TODO(crisbeto): remove the testing check once we have an overlay testing\n // module or Angular starts tearing down the testing `NgModule`. See:\n // https://github.com/angular/angular/issues/18831\n if (this._platform.isBrowser || _isTestEnvironment()) {\n const oppositePlatformContainers = this._document.querySelectorAll(`.${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 } else if (!this._platform.isBrowser) {\n container.setAttribute('platform', 'server');\n }\n this._document.body.appendChild(container);\n this._containerElement = container;\n }\n static {\n this.ɵfac = function OverlayContainer_Factory(ɵt) {\n return new (ɵt || OverlayContainer)(i0.ɵɵinject(DOCUMENT), i0.ɵɵinject(i1$1.Platform));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: OverlayContainer,\n factory: OverlayContainer.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(OverlayContainer, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: i1$1.Platform\n }];\n }, null);\n})();\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, _animationsDisabled = false) {\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._animationsDisabled = _animationsDisabled;\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 this._backdropTransitionendHandler = event => {\n this._disposeBackdrop(event.target);\n };\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 // Insert the host into the DOM before attaching the portal, otherwise\n // the animations module will skip animations on repeat attachments.\n if (!this._host.parentElement && this._previousHostParent) {\n this._previousHostParent.appendChild(this._host);\n }\n const attachResult = this._portalOutlet.attach(portal);\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 // TODO(crisbeto): the null check is here, because the portal outlet returns `any`.\n // We should be guaranteed for the result to be `ComponentRef | EmbeddedViewRef`, but\n // `instanceof EmbeddedViewRef` doesn't appear to work at the moment.\n if (typeof attachResult?.onDestroy === 'function') {\n // In most cases we control the portal and we know when it is being detached so that\n // we can finish the disposal process. The exception is if the user passes in a custom\n // `ViewContainerRef` that isn't destroyed through the overlay API. Note that we use\n // `detach` here instead of `dispose`, because we don't know if the user intends to\n // reattach the overlay at a later point. It also has the advantage of waiting for animations.\n attachResult.onDestroy(() => {\n if (this.hasAttached()) {\n // We have to delay the `detach` call, because detaching immediately prevents\n // other destroy hooks from running. This is likely a framework bug similar to\n // https://github.com/angular/angular/issues/46119\n this._ngZone.runOutsideAngular(() => Promise.resolve().then(() => this.detach()));\n }\n });\n }\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 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 this._host?.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 = {\n ...this._config,\n ...sizeConfig\n };\n this._updateElementSize();\n }\n /** Sets the LTR/RTL direction for the overlay. */\n setDirection(dir) {\n this._config = {\n ...this._config,\n direction: dir\n };\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._animationsDisabled) {\n this._backdropElement.classList.add('cdk-overlay-backdrop-noop-animation');\n }\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 (!this._animationsDisabled && typeof requestAnimationFrame !== 'undefined') {\n this._ngZone.runOutsideAngular(() => {\n requestAnimationFrame(() => {\n if (this._backdropElement) {\n this._backdropElement.classList.add(showingClass);\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 if (this._animationsDisabled) {\n this._disposeBackdrop(backdropToDetach);\n return;\n }\n backdropToDetach.classList.remove('cdk-overlay-backdrop-showing');\n this._ngZone.runOutsideAngular(() => {\n backdropToDetach.addEventListener('transitionend', this._backdropTransitionendHandler);\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 this._backdropTimeout = this._ngZone.runOutsideAngular(() => setTimeout(() => {\n this._disposeBackdrop(backdropToDetach);\n }, 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.pipe(takeUntil(merge(this._attachments, this._detachments))).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.removeEventListener('click', this._backdropClickHandler);\n backdrop.removeEventListener('transitionend', this._backdropTransitionendHandler);\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 if (this._backdropTimeout) {\n clearTimeout(this._backdropTimeout);\n this._backdropTimeout = undefined;\n }\n }\n}\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 /** Ordered list of preferred positions, from most to least desirable. */\n get positions() {\n return this._preferredPositions;\n }\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 = {\n width: 0,\n height: 0\n };\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 /** Attaches this position strategy to an overlay. */\n attach(overlayRef) {\n if (this._overlayRef && overlayRef !== this._overlayRef && (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 satisfies 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, the overlay and the container 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 this._containerRect = this._overlayContainer.getContainerElement().getBoundingClientRect();\n const originRect = this._originRect;\n const overlayRect = this._overlayRect;\n const viewportRect = this._viewportRect;\n const containerRect = this._containerRect;\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, containerRect, 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 = {\n overlayFit,\n overlayPoint,\n originPoint,\n position: pos,\n overlayRect\n };\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.isBrowser) {\n return;\n }\n const lastPosition = this._lastPosition;\n if (lastPosition) {\n this._originRect = this._getOriginRect();\n this._overlayRect = this._pane.getBoundingClientRect();\n this._viewportRect = this._getNarrowedViewportRect();\n this._containerRect = this._overlayContainer.getContainerElement().getBoundingClientRect();\n const originPoint = this._getOriginPoint(this._originRect, this._containerRect, lastPosition);\n this._applyPosition(lastPosition, originPoint);\n } else {\n this.apply();\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, containerRect, 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 } 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 // When zooming in Safari the container rectangle contains negative values for the position\n // and we need to re-add them to the calculated coordinates.\n if (containerRect.left < 0) {\n x -= containerRect.left;\n }\n let y;\n if (pos.originY == 'center') {\n y = originRect.top + originRect.height / 2;\n } else {\n y = pos.originY == 'top' ? originRect.top : originRect.bottom;\n }\n // Normally the containerRect's top value would be zero, however when the overlay is attached to an input\n // (e.g. in an 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 // Additionally, when zooming in Safari this fixes the vertical position.\n if (containerRect.top < 0) {\n y -= containerRect.top;\n }\n return {\n x,\n y\n };\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 } else if (pos.overlayX === 'start') {\n overlayStartX = this._isRtl() ? -overlayRect.width : 0;\n } else {\n overlayStartX = this._isRtl() ? 0 : -overlayRect.width;\n }\n let overlayStartY;\n if (pos.overlayY == 'center') {\n overlayStartY = -overlayRect.height / 2;\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 {\n x,\n y\n } = 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 overlay 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 occurring on the\n * right and bottom).\n *\n * @param start Starting point from which the overlay is pushed.\n * @param rawOverlayRect 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 } 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 } else {\n pushY = start.y < this._viewportMargin ? viewport.top - scrollPosition.top - start.y : 0;\n }\n this._previousPushAmount = {\n x: pushX,\n y: pushY\n };\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 // calculations 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 } else if (this._isRtl()) {\n xOrigin = position.overlayX === 'start' ? 'right' : 'left';\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 } 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 } 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 } else if (isBoundedByRightViewportEdge) {\n left = origin.x;\n width = viewport.right - origin.x;\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 {\n top: top,\n left: left,\n bottom: bottom,\n right: right,\n width,\n height\n };\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 stretches 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 } 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 } else {\n styles.alignItems = position.overlayX === 'end' ? 'flex-end' : 'flex-start';\n }\n if (position.overlayY === 'center') {\n styles.justifyContent = 'center';\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 } 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(${offsetY}px)`;\n }\n styles.transform = transformString.trim();\n // If a maxWidth or maxHeight is specified on the overlay, we remove them. We do this because\n // we need these values to both be set to \"100%\" for the automatic flexible sizing to work.\n // The maxHeight and maxWidth are set on the boundingBox in order to enforce the constraint.\n // Note that this doesn't apply when we have an exact position, in which case we do want to\n // apply them because they'll be cleared from the bounding box.\n if (config.maxHeight) {\n if (hasExactPosition) {\n styles.maxHeight = coerceCssPixelValue(config.maxHeight);\n } else if (hasFlexibleDimensions) {\n styles.maxHeight = '';\n }\n }\n if (config.maxWidth) {\n if (hasExactPosition) {\n styles.maxWidth = coerceCssPixelValue(config.maxWidth);\n } else if (hasFlexibleDimensions) {\n styles.maxWidth = '';\n }\n }\n extendStyles(this._pane.style, styles);\n }\n /** Gets the exact top/bottom for the overlay when not using flexible sizing or when pushing. */\n _getExactOverlayY(position, originPoint, scrollPosition) {\n // Reset any existing styles. This is necessary in case the\n // preferred position has changed since the last `apply`.\n let styles = {\n top: '',\n bottom: ''\n };\n let overlayPoint = this._getOverlayPoint(originPoint, this._overlayRect, position);\n if (this._isPushed) {\n overlayPoint = this._pushOverlayOnScreen(overlayPoint, this._overlayRect, scrollPosition);\n }\n // We want to set either `top` or `bottom` based on whether the overlay wants to appear\n // above or below the origin and the direction in which the element will expand.\n if (position.overlayY === 'bottom') {\n // When using `bottom`, we adjust the y position such that it is the distance\n // from the bottom of the viewport rather than the top.\n const documentHeight = this._document.documentElement.clientHeight;\n styles.bottom = `${documentHeight - (overlayPoint.y + this._overlayRect.height)}px`;\n } 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 = {\n left: '',\n right: ''\n };\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 } 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 } 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 breaking 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}\nconst STANDARD_DROPDOWN_BELOW_POSITIONS = [{\n originX: 'start',\n originY: 'bottom',\n overlayX: 'start',\n overlayY: 'top'\n}, {\n originX: 'start',\n originY: 'top',\n overlayX: 'start',\n overlayY: 'bottom'\n}, {\n originX: 'end',\n originY: 'bottom',\n overlayX: 'end',\n overlayY: 'top'\n}, {\n originX: 'end',\n originY: 'top',\n overlayX: 'end',\n overlayY: 'bottom'\n}];\nconst STANDARD_DROPDOWN_ADJACENT_POSITIONS = [{\n originX: 'end',\n originY: 'top',\n overlayX: 'start',\n overlayY: 'top'\n}, {\n originX: 'end',\n originY: 'bottom',\n overlayX: 'start',\n overlayY: 'bottom'\n}, {\n originX: 'start',\n originY: 'top',\n overlayX: 'end',\n overlayY: 'top'\n}, {\n originX: 'start',\n originY: 'bottom',\n overlayX: 'end',\n overlayY: 'bottom'\n}];\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._alignItems = '';\n this._xPosition = '';\n this._xOffset = '';\n this._width = '';\n this._height = '';\n this._isDisposed = false;\n }\n attach(overlayRef) {\n const config = overlayRef.getConfig();\n this._overlayRef = overlayRef;\n if (this._width && !config.width) {\n overlayRef.updateSize({\n width: this._width\n });\n }\n if (this._height && !config.height) {\n overlayRef.updateSize({\n height: this._height\n });\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._xOffset = value;\n this._xPosition = 'left';\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._xOffset = value;\n this._xPosition = 'right';\n return this;\n }\n /**\n * Sets the overlay to the start of the viewport, depending on the overlay direction.\n * This will be to the left in LTR layouts and to the right in RTL.\n * @param offset Offset from the edge of the screen.\n */\n start(value = '') {\n this._xOffset = value;\n this._xPosition = 'start';\n return this;\n }\n /**\n * Sets the overlay to the end of the viewport, depending on the overlay direction.\n * This will be to the right in LTR layouts and to the left in RTL.\n * @param offset Offset from the edge of the screen.\n */\n end(value = '') {\n this._xOffset = value;\n this._xPosition = '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({\n 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({\n 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._xPosition = '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 {\n width,\n height,\n maxWidth,\n maxHeight\n } = config;\n const shouldBeFlushHorizontally = (width === '100%' || width === '100vw') && (!maxWidth || maxWidth === '100%' || maxWidth === '100vw');\n const shouldBeFlushVertically = (height === '100%' || height === '100vh') && (!maxHeight || maxHeight === '100%' || maxHeight === '100vh');\n const xPosition = this._xPosition;\n const xOffset = this._xOffset;\n const isRtl = this._overlayRef.getConfig().direction === 'rtl';\n let marginLeft = '';\n let marginRight = '';\n let justifyContent = '';\n if (shouldBeFlushHorizontally) {\n justifyContent = 'flex-start';\n } else if (xPosition === 'center') {\n justifyContent = 'center';\n if (isRtl) {\n marginRight = xOffset;\n } else {\n marginLeft = xOffset;\n }\n } else if (isRtl) {\n if (xPosition === 'left' || xPosition === 'end') {\n justifyContent = 'flex-end';\n marginLeft = xOffset;\n } else if (xPosition === 'right' || xPosition === 'start') {\n justifyContent = 'flex-start';\n marginRight = xOffset;\n }\n } else if (xPosition === 'left' || xPosition === 'start') {\n justifyContent = 'flex-start';\n marginLeft = xOffset;\n } else if (xPosition === 'right' || xPosition === 'end') {\n justifyContent = 'flex-end';\n marginRight = xOffset;\n }\n styles.position = this._cssPosition;\n styles.marginLeft = shouldBeFlushHorizontally ? '0' : marginLeft;\n styles.marginTop = shouldBeFlushVertically ? '0' : this._topOffset;\n styles.marginBottom = this._bottomOffset;\n styles.marginRight = shouldBeFlushHorizontally ? '0' : marginRight;\n parentStyles.justifyContent = justifyContent;\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 = parentStyles.alignItems = styles.marginTop = styles.marginBottom = styles.marginLeft = styles.marginRight = styles.position = '';\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 static {\n this.ɵfac = function OverlayPositionBuilder_Factory(ɵt) {\n return new (ɵt || OverlayPositionBuilder)(i0.ɵɵinject(i1.ViewportRuler), i0.ɵɵinject(DOCUMENT), i0.ɵɵinject(i1$1.Platform), i0.ɵɵinject(OverlayContainer));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: OverlayPositionBuilder,\n factory: OverlayPositionBuilder.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(OverlayPositionBuilder, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: i1.ViewportRuler\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: i1$1.Platform\n }, {\n type: OverlayContainer\n }];\n }, null);\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( /** Scrolling strategies that can be used when creating an overlay. */\n scrollStrategies, _overlayContainer, _componentFactoryResolver, _positionBuilder, _keyboardDispatcher, _injector, _ngZone, _document, _directionality, _location, _outsideClickDispatcher, _animationsModuleType) {\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 this._animationsModuleType = _animationsModuleType;\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, this._animationsModuleType === 'NoopAnimations');\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 static {\n this.ɵfac = function Overlay_Factory(ɵt) {\n return new (ɵt || Overlay)(i0.ɵɵinject(ScrollStrategyOptions), i0.ɵɵinject(OverlayContainer), i0.ɵɵinject(i0.ComponentFactoryResolver), i0.ɵɵinject(OverlayPositionBuilder), i0.ɵɵinject(OverlayKeyboardDispatcher), i0.ɵɵinject(i0.Injector), i0.ɵɵinject(i0.NgZone), i0.ɵɵinject(DOCUMENT), i0.ɵɵinject(i5.Directionality), i0.ɵɵinject(i6.Location), i0.ɵɵinject(OverlayOutsideClickDispatcher), i0.ɵɵinject(ANIMATION_MODULE_TYPE, 8));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: Overlay,\n factory: Overlay.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(Overlay, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: ScrollStrategyOptions\n }, {\n type: OverlayContainer\n }, {\n type: i0.ComponentFactoryResolver\n }, {\n type: OverlayPositionBuilder\n }, {\n type: OverlayKeyboardDispatcher\n }, {\n type: i0.Injector\n }, {\n type: i0.NgZone\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: i5.Directionality\n }, {\n type: i6.Location\n }, {\n type: OverlayOutsideClickDispatcher\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [ANIMATION_MODULE_TYPE]\n }, {\n type: Optional\n }]\n }];\n }, null);\n})();\n\n/** Default set of positions for the overlay. Follows the behavior of a dropdown. */\nconst defaultPositionList = [{\n originX: 'start',\n originY: 'bottom',\n overlayX: 'start',\n overlayY: 'top'\n}, {\n originX: 'start',\n originY: 'top',\n overlayX: 'start',\n overlayY: 'bottom'\n}, {\n originX: 'end',\n originY: 'top',\n overlayX: 'end',\n overlayY: 'bottom'\n}, {\n originX: 'end',\n originY: 'bottom',\n overlayX: 'end',\n overlayY: 'top'\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( /** Reference to the element on which the directive is applied. */\n elementRef) {\n this.elementRef = elementRef;\n }\n static {\n this.ɵfac = function CdkOverlayOrigin_Factory(ɵt) {\n return new (ɵt || CdkOverlayOrigin)(i0.ɵɵdirectiveInject(i0.ElementRef));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkOverlayOrigin,\n selectors: [[\"\", \"cdk-overlay-origin\", \"\"], [\"\", \"overlay-origin\", \"\"], [\"\", \"cdkOverlayOrigin\", \"\"]],\n exportAs: [\"cdkOverlayOrigin\"],\n standalone: true\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkOverlayOrigin, [{\n type: Directive,\n args: [{\n selector: '[cdk-overlay-origin], [overlay-origin], [cdkOverlayOrigin]',\n exportAs: 'cdkOverlayOrigin',\n standalone: true\n }]\n }], function () {\n return [{\n type: i0.ElementRef\n }];\n }, null);\n})();\n/**\n * Directive to facilitate declarative creation of an\n * Overlay using a FlexibleConnectedPositionStrategy.\n */\nclass CdkConnectedOverlay {\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 // 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 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 = 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.setOrigin(this._getFlexibleConnectedPositionStrategyOrigin()).withPositions(positions).withFlexibleDimensions(this.flexibleDimensions).withPush(this.push).withGrowAfterOpen(this.growAfterOpen).withViewportMargin(this.viewportMargin).withLockedPosition(this.lockPosition).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.position().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 } 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 } 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 } 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.pipe(takeWhile(() => this.positionChange.observers.length > 0)).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 static {\n this.ɵfac = function CdkConnectedOverlay_Factory(ɵt) {\n return new (ɵt || CdkConnectedOverlay)(i0.ɵɵdirectiveInject(Overlay), i0.ɵɵdirectiveInject(i0.TemplateRef), i0.ɵɵdirectiveInject(i0.ViewContainerRef), i0.ɵɵdirectiveInject(CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY), i0.ɵɵdirectiveInject(i5.Directionality, 8));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkConnectedOverlay,\n selectors: [[\"\", \"cdk-connected-overlay\", \"\"], [\"\", \"connected-overlay\", \"\"], [\"\", \"cdkConnectedOverlay\", \"\"]],\n inputs: {\n origin: [0, \"cdkConnectedOverlayOrigin\", \"origin\"],\n positions: [0, \"cdkConnectedOverlayPositions\", \"positions\"],\n positionStrategy: [0, \"cdkConnectedOverlayPositionStrategy\", \"positionStrategy\"],\n offsetX: [0, \"cdkConnectedOverlayOffsetX\", \"offsetX\"],\n offsetY: [0, \"cdkConnectedOverlayOffsetY\", \"offsetY\"],\n width: [0, \"cdkConnectedOverlayWidth\", \"width\"],\n height: [0, \"cdkConnectedOverlayHeight\", \"height\"],\n minWidth: [0, \"cdkConnectedOverlayMinWidth\", \"minWidth\"],\n minHeight: [0, \"cdkConnectedOverlayMinHeight\", \"minHeight\"],\n backdropClass: [0, \"cdkConnectedOverlayBackdropClass\", \"backdropClass\"],\n panelClass: [0, \"cdkConnectedOverlayPanelClass\", \"panelClass\"],\n viewportMargin: [0, \"cdkConnectedOverlayViewportMargin\", \"viewportMargin\"],\n scrollStrategy: [0, \"cdkConnectedOverlayScrollStrategy\", \"scrollStrategy\"],\n open: [0, \"cdkConnectedOverlayOpen\", \"open\"],\n disableClose: [0, \"cdkConnectedOverlayDisableClose\", \"disableClose\"],\n transformOriginSelector: [0, \"cdkConnectedOverlayTransformOriginOn\", \"transformOriginSelector\"],\n hasBackdrop: [0, \"cdkConnectedOverlayHasBackdrop\", \"hasBackdrop\"],\n lockPosition: [0, \"cdkConnectedOverlayLockPosition\", \"lockPosition\"],\n flexibleDimensions: [0, \"cdkConnectedOverlayFlexibleDimensions\", \"flexibleDimensions\"],\n growAfterOpen: [0, \"cdkConnectedOverlayGrowAfterOpen\", \"growAfterOpen\"],\n push: [0, \"cdkConnectedOverlayPush\", \"push\"]\n },\n outputs: {\n backdropClick: \"backdropClick\",\n positionChange: \"positionChange\",\n attach: \"attach\",\n detach: \"detach\",\n overlayKeydown: \"overlayKeydown\",\n overlayOutsideClick: \"overlayOutsideClick\"\n },\n exportAs: [\"cdkConnectedOverlay\"],\n standalone: true,\n features: [i0.ɵɵNgOnChangesFeature]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkConnectedOverlay, [{\n type: Directive,\n args: [{\n selector: '[cdk-connected-overlay], [connected-overlay], [cdkConnectedOverlay]',\n exportAs: 'cdkConnectedOverlay',\n standalone: true\n }]\n }], function () {\n return [{\n type: Overlay\n }, {\n type: i0.TemplateRef\n }, {\n type: i0.ViewContainerRef\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY]\n }]\n }, {\n type: i5.Directionality,\n decorators: [{\n type: Optional\n }]\n }];\n }, {\n origin: [{\n type: Input,\n args: ['cdkConnectedOverlayOrigin']\n }],\n positions: [{\n type: Input,\n args: ['cdkConnectedOverlayPositions']\n }],\n positionStrategy: [{\n type: Input,\n args: ['cdkConnectedOverlayPositionStrategy']\n }],\n offsetX: [{\n type: Input,\n args: ['cdkConnectedOverlayOffsetX']\n }],\n offsetY: [{\n type: Input,\n args: ['cdkConnectedOverlayOffsetY']\n }],\n width: [{\n type: Input,\n args: ['cdkConnectedOverlayWidth']\n }],\n height: [{\n type: Input,\n args: ['cdkConnectedOverlayHeight']\n }],\n minWidth: [{\n type: Input,\n args: ['cdkConnectedOverlayMinWidth']\n }],\n minHeight: [{\n type: Input,\n args: ['cdkConnectedOverlayMinHeight']\n }],\n backdropClass: [{\n type: Input,\n args: ['cdkConnectedOverlayBackdropClass']\n }],\n panelClass: [{\n type: Input,\n args: ['cdkConnectedOverlayPanelClass']\n }],\n viewportMargin: [{\n type: Input,\n args: ['cdkConnectedOverlayViewportMargin']\n }],\n scrollStrategy: [{\n type: Input,\n args: ['cdkConnectedOverlayScrollStrategy']\n }],\n open: [{\n type: Input,\n args: ['cdkConnectedOverlayOpen']\n }],\n disableClose: [{\n type: Input,\n args: ['cdkConnectedOverlayDisableClose']\n }],\n transformOriginSelector: [{\n type: Input,\n args: ['cdkConnectedOverlayTransformOriginOn']\n }],\n hasBackdrop: [{\n type: Input,\n args: ['cdkConnectedOverlayHasBackdrop']\n }],\n lockPosition: [{\n type: Input,\n args: ['cdkConnectedOverlayLockPosition']\n }],\n flexibleDimensions: [{\n type: Input,\n args: ['cdkConnectedOverlayFlexibleDimensions']\n }],\n growAfterOpen: [{\n type: Input,\n args: ['cdkConnectedOverlayGrowAfterOpen']\n }],\n push: [{\n type: Input,\n args: ['cdkConnectedOverlayPush']\n }],\n backdropClick: [{\n type: Output\n }],\n positionChange: [{\n type: Output\n }],\n attach: [{\n type: Output\n }],\n detach: [{\n type: Output\n }],\n overlayKeydown: [{\n type: Output\n }],\n overlayOutsideClick: [{\n type: Output\n }]\n });\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};\nclass OverlayModule {\n static {\n this.ɵfac = function OverlayModule_Factory(ɵt) {\n return new (ɵt || OverlayModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: OverlayModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n providers: [Overlay, CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER],\n imports: [BidiModule, PortalModule, ScrollingModule, ScrollingModule]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(OverlayModule, [{\n type: NgModule,\n args: [{\n imports: [BidiModule, PortalModule, ScrollingModule, CdkConnectedOverlay, CdkOverlayOrigin],\n exports: [CdkConnectedOverlay, CdkOverlayOrigin, ScrollingModule],\n providers: [Overlay, CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER]\n }]\n }], null, null);\n})();\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 } else if (_document.webkitFullscreenEnabled) {\n this._fullScreenEventName = 'webkitfullscreenchange';\n } else if (_document.mozFullScreenEnabled) {\n this._fullScreenEventName = 'mozfullscreenchange';\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 || _document.webkitFullscreenElement || _document.mozFullScreenElement || _document.msFullscreenElement || null;\n }\n static {\n this.ɵfac = function FullscreenOverlayContainer_Factory(ɵt) {\n return new (ɵt || FullscreenOverlayContainer)(i0.ɵɵinject(DOCUMENT), i0.ɵɵinject(i1$1.Platform));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: FullscreenOverlayContainer,\n factory: FullscreenOverlayContainer.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(FullscreenOverlayContainer, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: i1$1.Platform\n }];\n }, null);\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, STANDARD_DROPDOWN_ADJACENT_POSITIONS, STANDARD_DROPDOWN_BELOW_POSITIONS, ScrollStrategyOptions, ScrollingVisibility, validateHorizontalPosition, validateVerticalPosition };\n","import { coerceElement, coerceBooleanProperty, coerceNumberProperty } from '@angular/cdk/coercion';\nimport * as i0 from '@angular/core';\nimport { Injectable, EventEmitter, Directive, Output, Input, NgModule } from '@angular/core';\nimport { Observable, Subject } from 'rxjs';\nimport { debounceTime } from 'rxjs/operators';\n\n/**\n * Factory that creates a new MutationObserver and allows us to stub it out in unit tests.\n * @docs-private\n */\nclass MutationObserverFactory {\n create(callback) {\n return typeof MutationObserver === 'undefined' ? null : new MutationObserver(callback);\n }\n static {\n this.ɵfac = function MutationObserverFactory_Factory(ɵt) {\n return new (ɵt || MutationObserverFactory)();\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: MutationObserverFactory,\n factory: MutationObserverFactory.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(MutationObserverFactory, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], null, null);\n})();\n/** An injectable service that allows watching elements for changes to their content. */\nclass ContentObserver {\n constructor(_mutationObserverFactory) {\n this._mutationObserverFactory = _mutationObserverFactory;\n /** Keeps track of the existing MutationObservers so they can be reused. */\n this._observedElements = new Map();\n }\n ngOnDestroy() {\n this._observedElements.forEach((_, element) => this._cleanupObserver(element));\n }\n observe(elementOrRef) {\n const element = coerceElement(elementOrRef);\n return new Observable(observer => {\n const stream = this._observeElement(element);\n const subscription = stream.subscribe(observer);\n return () => {\n subscription.unsubscribe();\n this._unobserveElement(element);\n };\n });\n }\n /**\n * Observes the given element by using the existing MutationObserver if available, or creating a\n * new one if not.\n */\n _observeElement(element) {\n if (!this._observedElements.has(element)) {\n const stream = new Subject();\n const observer = this._mutationObserverFactory.create(mutations => stream.next(mutations));\n if (observer) {\n observer.observe(element, {\n characterData: true,\n childList: true,\n subtree: true\n });\n }\n this._observedElements.set(element, {\n observer,\n stream,\n count: 1\n });\n } else {\n this._observedElements.get(element).count++;\n }\n return this._observedElements.get(element).stream;\n }\n /**\n * Un-observes the given element and cleans up the underlying MutationObserver if nobody else is\n * observing this element.\n */\n _unobserveElement(element) {\n if (this._observedElements.has(element)) {\n this._observedElements.get(element).count--;\n if (!this._observedElements.get(element).count) {\n this._cleanupObserver(element);\n }\n }\n }\n /** Clean up the underlying MutationObserver for the specified element. */\n _cleanupObserver(element) {\n if (this._observedElements.has(element)) {\n const {\n observer,\n stream\n } = this._observedElements.get(element);\n if (observer) {\n observer.disconnect();\n }\n stream.complete();\n this._observedElements.delete(element);\n }\n }\n static {\n this.ɵfac = function ContentObserver_Factory(ɵt) {\n return new (ɵt || ContentObserver)(i0.ɵɵinject(MutationObserverFactory));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: ContentObserver,\n factory: ContentObserver.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(ContentObserver, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: MutationObserverFactory\n }];\n }, null);\n})();\n/**\n * Directive that triggers a callback whenever the content of\n * its associated element has changed.\n */\nclass CdkObserveContent {\n /**\n * Whether observing content is disabled. This option can be used\n * to disconnect the underlying MutationObserver until it is needed.\n */\n get disabled() {\n return this._disabled;\n }\n set disabled(value) {\n this._disabled = coerceBooleanProperty(value);\n this._disabled ? this._unsubscribe() : this._subscribe();\n }\n /** Debounce interval for emitting the changes. */\n get debounce() {\n return this._debounce;\n }\n set debounce(value) {\n this._debounce = coerceNumberProperty(value);\n this._subscribe();\n }\n constructor(_contentObserver, _elementRef, _ngZone) {\n this._contentObserver = _contentObserver;\n this._elementRef = _elementRef;\n this._ngZone = _ngZone;\n /** Event emitted for each change in the element's content. */\n this.event = new EventEmitter();\n this._disabled = false;\n this._currentSubscription = null;\n }\n ngAfterContentInit() {\n if (!this._currentSubscription && !this.disabled) {\n this._subscribe();\n }\n }\n ngOnDestroy() {\n this._unsubscribe();\n }\n _subscribe() {\n this._unsubscribe();\n const stream = this._contentObserver.observe(this._elementRef);\n // TODO(mmalerba): We shouldn't be emitting on this @Output() outside the zone.\n // Consider brining it back inside the zone next time we're making breaking changes.\n // Bringing it back inside can cause things like infinite change detection loops and changed\n // after checked errors if people's code isn't handling it properly.\n this._ngZone.runOutsideAngular(() => {\n this._currentSubscription = (this.debounce ? stream.pipe(debounceTime(this.debounce)) : stream).subscribe(this.event);\n });\n }\n _unsubscribe() {\n this._currentSubscription?.unsubscribe();\n }\n static {\n this.ɵfac = function CdkObserveContent_Factory(ɵt) {\n return new (ɵt || CdkObserveContent)(i0.ɵɵdirectiveInject(ContentObserver), i0.ɵɵdirectiveInject(i0.ElementRef), i0.ɵɵdirectiveInject(i0.NgZone));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkObserveContent,\n selectors: [[\"\", \"cdkObserveContent\", \"\"]],\n inputs: {\n disabled: [0, \"cdkObserveContentDisabled\", \"disabled\"],\n debounce: \"debounce\"\n },\n outputs: {\n event: \"cdkObserveContent\"\n },\n exportAs: [\"cdkObserveContent\"]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkObserveContent, [{\n type: Directive,\n args: [{\n selector: '[cdkObserveContent]',\n exportAs: 'cdkObserveContent'\n }]\n }], function () {\n return [{\n type: ContentObserver\n }, {\n type: i0.ElementRef\n }, {\n type: i0.NgZone\n }];\n }, {\n event: [{\n type: Output,\n args: ['cdkObserveContent']\n }],\n disabled: [{\n type: Input,\n args: ['cdkObserveContentDisabled']\n }],\n debounce: [{\n type: Input\n }]\n });\n})();\nclass ObserversModule {\n static {\n this.ɵfac = function ObserversModule_Factory(ɵt) {\n return new (ɵt || ObserversModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: ObserversModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n providers: [MutationObserverFactory]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(ObserversModule, [{\n type: NgModule,\n args: [{\n exports: [CdkObserveContent],\n declarations: [CdkObserveContent],\n providers: [MutationObserverFactory]\n }]\n }], null, null);\n})();\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { CdkObserveContent, ContentObserver, MutationObserverFactory, ObserversModule };\n","import * as i0 from '@angular/core';\nimport { NgModule, CSP_NONCE, Injectable, Optional, Inject } 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';\nclass LayoutModule {\n static {\n this.ɵfac = function LayoutModule_Factory(ɵt) {\n return new (ɵt || LayoutModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: LayoutModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({});\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(LayoutModule, [{\n type: NgModule,\n args: [{}]\n }], null, null);\n})();\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, _nonce) {\n this._platform = _platform;\n this._nonce = _nonce;\n this._matchMedia = 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) : 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, this._nonce);\n }\n return this._matchMedia(query);\n }\n static {\n this.ɵfac = function MediaMatcher_Factory(ɵt) {\n return new (ɵt || MediaMatcher)(i0.ɵɵinject(i1.Platform), i0.ɵɵinject(CSP_NONCE, 8));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: MediaMatcher,\n factory: MediaMatcher.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(MediaMatcher, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: i1.Platform\n }, {\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [CSP_NONCE]\n }]\n }];\n }, null);\n})();\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, nonce) {\n if (mediaQueriesForWebkitCompatibility.has(query)) {\n return;\n }\n try {\n if (!mediaQueryStyleNode) {\n mediaQueryStyleNode = document.createElement('style');\n if (nonce) {\n mediaQueryStyleNode.nonce = nonce;\n }\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 } 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/** 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(({\n matches,\n query\n }) => {\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(({\n matches\n }) => ({\n query,\n matches\n })), takeUntil(this._destroySubject));\n // Add the MediaQueryList to the set of queries.\n const output = {\n observable: queryObservable,\n mql\n };\n this._queries.set(query, output);\n return output;\n }\n static {\n this.ɵfac = function BreakpointObserver_Factory(ɵt) {\n return new (ɵt || BreakpointObserver)(i0.ɵɵinject(MediaMatcher), i0.ɵɵinject(i0.NgZone));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: BreakpointObserver,\n factory: BreakpointObserver.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(BreakpointObserver, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: MediaMatcher\n }, {\n type: i0.NgZone\n }];\n }, null);\n})();\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.map(query => query.split(',')).reduce((a1, a2) => a1.concat(a2)).map(query => query.trim());\n}\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), ' + '(max-width: 959.98px) and (orientation: landscape)',\n Tablet: '(min-width: 600px) and (max-width: 839.98px) and (orientation: portrait), ' + '(min-width: 960px) and (max-width: 1279.98px) and (orientation: landscape)',\n Web: '(min-width: 840px) and (orientation: portrait), ' + '(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 * Generated bundle index. Do not edit.\n */\n\nexport { BreakpointObserver, Breakpoints, LayoutModule, MediaMatcher };\n","import { DOCUMENT } from '@angular/common';\nimport * as i0 from '@angular/core';\nimport { inject, APP_ID, Injectable, Inject, QueryList, Directive, Input, InjectionToken, Optional, EventEmitter, Output, NgModule } from '@angular/core';\nimport * as i1 from '@angular/cdk/platform';\nimport { _getFocusedElementPierceShadowDom, normalizePassiveListenerOptions, _getEventTarget, _getShadowRoot } from '@angular/cdk/platform';\nimport { Subject, Subscription, BehaviorSubject, of } from 'rxjs';\nimport { hasModifierKey, A, Z, ZERO, NINE, PAGE_DOWN, PAGE_UP, END, HOME, LEFT_ARROW, RIGHT_ARROW, UP_ARROW, DOWN_ARROW, TAB, ALT, CONTROL, MAC_META, META, SHIFT } from '@angular/cdk/keycodes';\nimport { tap, debounceTime, filter, map, take, skip, distinctUntilChanged, takeUntil } from 'rxjs/operators';\nimport { coerceBooleanProperty, coerceElement } from '@angular/cdk/coercion';\nimport * as i1$1 from '@angular/cdk/observers';\nimport { ObserversModule } from '@angular/cdk/observers';\nimport { BreakpointObserver } from '@angular/cdk/layout';\n\n/** IDs are delimited by an empty space, as per the spec. */\nconst ID_DELIMITER = ' ';\n/**\n * Adds the given ID to the specified ARIA attribute on an element.\n * Used for attributes such as aria-labelledby, aria-owns, etc.\n */\nfunction addAriaReferencedId(el, attr, id) {\n const ids = getAriaReferenceIds(el, attr);\n if (ids.some(existingId => existingId.trim() == id.trim())) {\n return;\n }\n ids.push(id.trim());\n el.setAttribute(attr, ids.join(ID_DELIMITER));\n}\n/**\n * Removes the given ID from the specified ARIA attribute on an element.\n * Used for attributes such as aria-labelledby, aria-owns, etc.\n */\nfunction removeAriaReferencedId(el, attr, id) {\n const ids = getAriaReferenceIds(el, attr);\n const filteredIds = ids.filter(val => val != id.trim());\n if (filteredIds.length) {\n el.setAttribute(attr, filteredIds.join(ID_DELIMITER));\n } else {\n el.removeAttribute(attr);\n }\n}\n/**\n * Gets the list of IDs referenced by the given ARIA attribute on an element.\n * Used for attributes such as aria-labelledby, aria-owns, etc.\n */\nfunction getAriaReferenceIds(el, attr) {\n // Get string array of all individual ids (whitespace delimited) in the attribute value\n return (el.getAttribute(attr) || '').match(/\\S+/g) || [];\n}\n\n/**\n * ID used for the body container where all messages are appended.\n * @deprecated No longer being used. To be removed.\n * @breaking-change 14.0.0\n */\nconst MESSAGES_CONTAINER_ID = 'cdk-describedby-message-container';\n/**\n * ID prefix used for each created message element.\n * @deprecated To be turned into a private variable.\n * @breaking-change 14.0.0\n */\nconst CDK_DESCRIBEDBY_ID_PREFIX = 'cdk-describedby-message';\n/**\n * Attribute given to each host element that is described by a message element.\n * @deprecated To be turned into a private variable.\n * @breaking-change 14.0.0\n */\nconst CDK_DESCRIBEDBY_HOST_ATTRIBUTE = 'cdk-describedby-host';\n/** Global incremental identifier for each registered message element. */\nlet nextId = 0;\n/**\n * Utility that creates visually hidden elements with a message content. Useful for elements that\n * want to use aria-describedby to further describe themselves without adding additional visual\n * content.\n */\nclass AriaDescriber {\n constructor(_document,\n /**\n * @deprecated To be turned into a required parameter.\n * @breaking-change 14.0.0\n */\n _platform) {\n this._platform = _platform;\n /** Map of all registered message elements that have been placed into the document. */\n this._messageRegistry = new Map();\n /** Container for all registered messages. */\n this._messagesContainer = null;\n /** Unique ID for the service. */\n this._id = `${nextId++}`;\n this._document = _document;\n this._id = inject(APP_ID) + '-' + nextId++;\n }\n describe(hostElement, message, role) {\n if (!this._canBeDescribed(hostElement, message)) {\n return;\n }\n const key = getKey(message, role);\n if (typeof message !== 'string') {\n // We need to ensure that the element has an ID.\n setMessageId(message, this._id);\n this._messageRegistry.set(key, {\n messageElement: message,\n referenceCount: 0\n });\n } else if (!this._messageRegistry.has(key)) {\n this._createMessageElement(message, role);\n }\n if (!this._isElementDescribedByMessage(hostElement, key)) {\n this._addMessageReference(hostElement, key);\n }\n }\n removeDescription(hostElement, message, role) {\n if (!message || !this._isElementNode(hostElement)) {\n return;\n }\n const key = getKey(message, role);\n if (this._isElementDescribedByMessage(hostElement, key)) {\n this._removeMessageReference(hostElement, key);\n }\n // If the message is a string, it means that it's one that we created for the\n // consumer so we can remove it safely, otherwise we should leave it in place.\n if (typeof message === 'string') {\n const registeredMessage = this._messageRegistry.get(key);\n if (registeredMessage && registeredMessage.referenceCount === 0) {\n this._deleteMessageElement(key);\n }\n }\n if (this._messagesContainer?.childNodes.length === 0) {\n this._messagesContainer.remove();\n this._messagesContainer = null;\n }\n }\n /** Unregisters all created message elements and removes the message container. */\n ngOnDestroy() {\n const describedElements = this._document.querySelectorAll(`[${CDK_DESCRIBEDBY_HOST_ATTRIBUTE}=\"${this._id}\"]`);\n for (let i = 0; i < describedElements.length; i++) {\n this._removeCdkDescribedByReferenceIds(describedElements[i]);\n describedElements[i].removeAttribute(CDK_DESCRIBEDBY_HOST_ATTRIBUTE);\n }\n this._messagesContainer?.remove();\n this._messagesContainer = null;\n this._messageRegistry.clear();\n }\n /**\n * Creates a new element in the visually hidden message container element with the message\n * as its content and adds it to the message registry.\n */\n _createMessageElement(message, role) {\n const messageElement = this._document.createElement('div');\n setMessageId(messageElement, this._id);\n messageElement.textContent = message;\n if (role) {\n messageElement.setAttribute('role', role);\n }\n this._createMessagesContainer();\n this._messagesContainer.appendChild(messageElement);\n this._messageRegistry.set(getKey(message, role), {\n messageElement,\n referenceCount: 0\n });\n }\n /** Deletes the message element from the global messages container. */\n _deleteMessageElement(key) {\n this._messageRegistry.get(key)?.messageElement?.remove();\n this._messageRegistry.delete(key);\n }\n /** Creates the global container for all aria-describedby messages. */\n _createMessagesContainer() {\n if (this._messagesContainer) {\n return;\n }\n const containerClassName = 'cdk-describedby-message-container';\n const serverContainers = this._document.querySelectorAll(`.${containerClassName}[platform=\"server\"]`);\n for (let i = 0; i < serverContainers.length; i++) {\n // When going from the server to the client, we may end up in a situation where there's\n // already a container on the page, but we don't have a reference to it. Clear the\n // old container so we don't get duplicates. Doing this, instead of emptying the previous\n // container, should be slightly faster.\n serverContainers[i].remove();\n }\n const messagesContainer = this._document.createElement('div');\n // We add `visibility: hidden` in order to prevent text in this container from\n // being searchable by the browser's Ctrl + F functionality.\n // Screen-readers will still read the description for elements with aria-describedby even\n // when the description element is not visible.\n messagesContainer.style.visibility = 'hidden';\n // Even though we use `visibility: hidden`, we still apply `cdk-visually-hidden` so that\n // the description element doesn't impact page layout.\n messagesContainer.classList.add(containerClassName);\n messagesContainer.classList.add('cdk-visually-hidden');\n // @breaking-change 14.0.0 Remove null check for `_platform`.\n if (this._platform && !this._platform.isBrowser) {\n messagesContainer.setAttribute('platform', 'server');\n }\n this._document.body.appendChild(messagesContainer);\n this._messagesContainer = messagesContainer;\n }\n /** Removes all cdk-describedby messages that are hosted through the element. */\n _removeCdkDescribedByReferenceIds(element) {\n // Remove all aria-describedby reference IDs that are prefixed by CDK_DESCRIBEDBY_ID_PREFIX\n const originalReferenceIds = getAriaReferenceIds(element, 'aria-describedby').filter(id => id.indexOf(CDK_DESCRIBEDBY_ID_PREFIX) != 0);\n element.setAttribute('aria-describedby', originalReferenceIds.join(' '));\n }\n /**\n * Adds a message reference to the element using aria-describedby and increments the registered\n * message's reference count.\n */\n _addMessageReference(element, key) {\n const registeredMessage = this._messageRegistry.get(key);\n // Add the aria-describedby reference and set the\n // describedby_host attribute to mark the element.\n addAriaReferencedId(element, 'aria-describedby', registeredMessage.messageElement.id);\n element.setAttribute(CDK_DESCRIBEDBY_HOST_ATTRIBUTE, this._id);\n registeredMessage.referenceCount++;\n }\n /**\n * Removes a message reference from the element using aria-describedby\n * and decrements the registered message's reference count.\n */\n _removeMessageReference(element, key) {\n const registeredMessage = this._messageRegistry.get(key);\n registeredMessage.referenceCount--;\n removeAriaReferencedId(element, 'aria-describedby', registeredMessage.messageElement.id);\n element.removeAttribute(CDK_DESCRIBEDBY_HOST_ATTRIBUTE);\n }\n /** Returns true if the element has been described by the provided message ID. */\n _isElementDescribedByMessage(element, key) {\n const referenceIds = getAriaReferenceIds(element, 'aria-describedby');\n const registeredMessage = this._messageRegistry.get(key);\n const messageId = registeredMessage && registeredMessage.messageElement.id;\n return !!messageId && referenceIds.indexOf(messageId) != -1;\n }\n /** Determines whether a message can be described on a particular element. */\n _canBeDescribed(element, message) {\n if (!this._isElementNode(element)) {\n return false;\n }\n if (message && typeof message === 'object') {\n // We'd have to make some assumptions about the description element's text, if the consumer\n // passed in an element. Assume that if an element is passed in, the consumer has verified\n // that it can be used as a description.\n return true;\n }\n const trimmedMessage = message == null ? '' : `${message}`.trim();\n const ariaLabel = element.getAttribute('aria-label');\n // We shouldn't set descriptions if they're exactly the same as the `aria-label` of the\n // element, because screen readers will end up reading out the same text twice in a row.\n return trimmedMessage ? !ariaLabel || ariaLabel.trim() !== trimmedMessage : false;\n }\n /** Checks whether a node is an Element node. */\n _isElementNode(element) {\n return element.nodeType === this._document.ELEMENT_NODE;\n }\n static {\n this.ɵfac = function AriaDescriber_Factory(ɵt) {\n return new (ɵt || AriaDescriber)(i0.ɵɵinject(DOCUMENT), i0.ɵɵinject(i1.Platform));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: AriaDescriber,\n factory: AriaDescriber.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(AriaDescriber, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: i1.Platform\n }];\n }, null);\n})();\n/** Gets a key that can be used to look messages up in the registry. */\nfunction getKey(message, role) {\n return typeof message === 'string' ? `${role || ''}/${message}` : message;\n}\n/** Assigns a unique ID to an element, if it doesn't have one already. */\nfunction setMessageId(element, serviceId) {\n if (!element.id) {\n element.id = `${CDK_DESCRIBEDBY_ID_PREFIX}-${serviceId}-${nextId++}`;\n }\n}\n\n/**\n * This class manages keyboard events for selectable lists. If you pass it a query list\n * of items, it will set the active item correctly when arrow events occur.\n */\nclass ListKeyManager {\n constructor(_items) {\n this._items = _items;\n this._activeItemIndex = -1;\n this._activeItem = null;\n this._wrap = false;\n this._letterKeyStream = new Subject();\n this._typeaheadSubscription = Subscription.EMPTY;\n this._vertical = true;\n this._allowedModifierKeys = [];\n this._homeAndEnd = false;\n this._pageUpAndDown = {\n enabled: false,\n delta: 10\n };\n /**\n * Predicate function that can be used to check whether an item should be skipped\n * by the key manager. By default, disabled items are skipped.\n */\n this._skipPredicateFn = item => item.disabled;\n // Buffer for the letters that the user has pressed when the typeahead option is turned on.\n this._pressedLetters = [];\n /**\n * Stream that emits any time the TAB key is pressed, so components can react\n * when focus is shifted off of the list.\n */\n this.tabOut = new Subject();\n /** Stream that emits whenever the active item of the list manager changes. */\n this.change = new Subject();\n // We allow for the items to be an array because, in some cases, the consumer may\n // not have access to a QueryList of the items they want to manage (e.g. when the\n // items aren't being collected via `ViewChildren` or `ContentChildren`).\n if (_items instanceof QueryList) {\n this._itemChangesSubscription = _items.changes.subscribe(newItems => {\n if (this._activeItem) {\n const itemArray = newItems.toArray();\n const newIndex = itemArray.indexOf(this._activeItem);\n if (newIndex > -1 && newIndex !== this._activeItemIndex) {\n this._activeItemIndex = newIndex;\n }\n }\n });\n }\n }\n /**\n * Sets the predicate function that determines which items should be skipped by the\n * list key manager.\n * @param predicate Function that determines whether the given item should be skipped.\n */\n skipPredicate(predicate) {\n this._skipPredicateFn = predicate;\n return this;\n }\n /**\n * Configures wrapping mode, which determines whether the active item will wrap to\n * the other end of list when there are no more items in the given direction.\n * @param shouldWrap Whether the list should wrap when reaching the end.\n */\n withWrap(shouldWrap = true) {\n this._wrap = shouldWrap;\n return this;\n }\n /**\n * Configures whether the key manager should be able to move the selection vertically.\n * @param enabled Whether vertical selection should be enabled.\n */\n withVerticalOrientation(enabled = true) {\n this._vertical = enabled;\n return this;\n }\n /**\n * Configures the key manager to move the selection horizontally.\n * Passing in `null` will disable horizontal movement.\n * @param direction Direction in which the selection can be moved.\n */\n withHorizontalOrientation(direction) {\n this._horizontal = direction;\n return this;\n }\n /**\n * Modifier keys which are allowed to be held down and whose default actions will be prevented\n * as the user is pressing the arrow keys. Defaults to not allowing any modifier keys.\n */\n withAllowedModifierKeys(keys) {\n this._allowedModifierKeys = keys;\n return this;\n }\n /**\n * Turns on typeahead mode which allows users to set the active item by typing.\n * @param debounceInterval Time to wait after the last keystroke before setting the active item.\n */\n withTypeAhead(debounceInterval = 200) {\n if ((typeof ngDevMode === 'undefined' || ngDevMode) && this._items.length && this._items.some(item => typeof item.getLabel !== 'function')) {\n throw Error('ListKeyManager items in typeahead mode must implement the `getLabel` method.');\n }\n this._typeaheadSubscription.unsubscribe();\n // Debounce the presses of non-navigational keys, collect the ones that correspond to letters\n // and convert those letters back into a string. Afterwards find the first item that starts\n // with that string and select it.\n this._typeaheadSubscription = this._letterKeyStream.pipe(tap(letter => this._pressedLetters.push(letter)), debounceTime(debounceInterval), filter(() => this._pressedLetters.length > 0), map(() => this._pressedLetters.join(''))).subscribe(inputString => {\n const items = this._getItemsArray();\n // Start at 1 because we want to start searching at the item immediately\n // following the current active item.\n for (let i = 1; i < items.length + 1; i++) {\n const index = (this._activeItemIndex + i) % items.length;\n const item = items[index];\n if (!this._skipPredicateFn(item) && item.getLabel().toUpperCase().trim().indexOf(inputString) === 0) {\n this.setActiveItem(index);\n break;\n }\n }\n this._pressedLetters = [];\n });\n return this;\n }\n /** Cancels the current typeahead sequence. */\n cancelTypeahead() {\n this._pressedLetters = [];\n return this;\n }\n /**\n * Configures the key manager to activate the first and last items\n * respectively when the Home or End key is pressed.\n * @param enabled Whether pressing the Home or End key activates the first/last item.\n */\n withHomeAndEnd(enabled = true) {\n this._homeAndEnd = enabled;\n return this;\n }\n /**\n * Configures the key manager to activate every 10th, configured or first/last element in up/down direction\n * respectively when the Page-Up or Page-Down key is pressed.\n * @param enabled Whether pressing the Page-Up or Page-Down key activates the first/last item.\n * @param delta Whether pressing the Home or End key activates the first/last item.\n */\n withPageUpDown(enabled = true, delta = 10) {\n this._pageUpAndDown = {\n enabled,\n delta\n };\n return this;\n }\n setActiveItem(item) {\n const previousActiveItem = this._activeItem;\n this.updateActiveItem(item);\n if (this._activeItem !== previousActiveItem) {\n this.change.next(this._activeItemIndex);\n }\n }\n /**\n * Sets the active item depending on the key event passed in.\n * @param event Keyboard event to be used for determining which element should be active.\n */\n onKeydown(event) {\n const keyCode = event.keyCode;\n const modifiers = ['altKey', 'ctrlKey', 'metaKey', 'shiftKey'];\n const isModifierAllowed = modifiers.every(modifier => {\n return !event[modifier] || this._allowedModifierKeys.indexOf(modifier) > -1;\n });\n switch (keyCode) {\n case TAB:\n this.tabOut.next();\n return;\n case DOWN_ARROW:\n if (this._vertical && isModifierAllowed) {\n this.setNextItemActive();\n break;\n } else {\n return;\n }\n case UP_ARROW:\n if (this._vertical && isModifierAllowed) {\n this.setPreviousItemActive();\n break;\n } else {\n return;\n }\n case RIGHT_ARROW:\n if (this._horizontal && isModifierAllowed) {\n this._horizontal === 'rtl' ? this.setPreviousItemActive() : this.setNextItemActive();\n break;\n } else {\n return;\n }\n case LEFT_ARROW:\n if (this._horizontal && isModifierAllowed) {\n this._horizontal === 'rtl' ? this.setNextItemActive() : this.setPreviousItemActive();\n break;\n } else {\n return;\n }\n case HOME:\n if (this._homeAndEnd && isModifierAllowed) {\n this.setFirstItemActive();\n break;\n } else {\n return;\n }\n case END:\n if (this._homeAndEnd && isModifierAllowed) {\n this.setLastItemActive();\n break;\n } else {\n return;\n }\n case PAGE_UP:\n if (this._pageUpAndDown.enabled && isModifierAllowed) {\n const targetIndex = this._activeItemIndex - this._pageUpAndDown.delta;\n this._setActiveItemByIndex(targetIndex > 0 ? targetIndex : 0, 1);\n break;\n } else {\n return;\n }\n case PAGE_DOWN:\n if (this._pageUpAndDown.enabled && isModifierAllowed) {\n const targetIndex = this._activeItemIndex + this._pageUpAndDown.delta;\n const itemsLength = this._getItemsArray().length;\n this._setActiveItemByIndex(targetIndex < itemsLength ? targetIndex : itemsLength - 1, -1);\n break;\n } else {\n return;\n }\n default:\n if (isModifierAllowed || hasModifierKey(event, 'shiftKey')) {\n // Attempt to use the `event.key` which also maps it to the user's keyboard language,\n // otherwise fall back to resolving alphanumeric characters via the keyCode.\n if (event.key && event.key.length === 1) {\n this._letterKeyStream.next(event.key.toLocaleUpperCase());\n } else if (keyCode >= A && keyCode <= Z || keyCode >= ZERO && keyCode <= NINE) {\n this._letterKeyStream.next(String.fromCharCode(keyCode));\n }\n }\n // Note that we return here, in order to avoid preventing\n // the default action of non-navigational keys.\n return;\n }\n this._pressedLetters = [];\n event.preventDefault();\n }\n /** Index of the currently active item. */\n get activeItemIndex() {\n return this._activeItemIndex;\n }\n /** The active item. */\n get activeItem() {\n return this._activeItem;\n }\n /** Gets whether the user is currently typing into the manager using the typeahead feature. */\n isTyping() {\n return this._pressedLetters.length > 0;\n }\n /** Sets the active item to the first enabled item in the list. */\n setFirstItemActive() {\n this._setActiveItemByIndex(0, 1);\n }\n /** Sets the active item to the last enabled item in the list. */\n setLastItemActive() {\n this._setActiveItemByIndex(this._items.length - 1, -1);\n }\n /** Sets the active item to the next enabled item in the list. */\n setNextItemActive() {\n this._activeItemIndex < 0 ? this.setFirstItemActive() : this._setActiveItemByDelta(1);\n }\n /** Sets the active item to a previous enabled item in the list. */\n setPreviousItemActive() {\n this._activeItemIndex < 0 && this._wrap ? this.setLastItemActive() : this._setActiveItemByDelta(-1);\n }\n updateActiveItem(item) {\n const itemArray = this._getItemsArray();\n const index = typeof item === 'number' ? item : itemArray.indexOf(item);\n const activeItem = itemArray[index];\n // Explicitly check for `null` and `undefined` because other falsy values are valid.\n this._activeItem = activeItem == null ? null : activeItem;\n this._activeItemIndex = index;\n }\n /** Cleans up the key manager. */\n destroy() {\n this._typeaheadSubscription.unsubscribe();\n this._itemChangesSubscription?.unsubscribe();\n this._letterKeyStream.complete();\n this.tabOut.complete();\n this.change.complete();\n this._pressedLetters = [];\n }\n /**\n * This method sets the active item, given a list of items and the delta between the\n * currently active item and the new active item. It will calculate differently\n * depending on whether wrap mode is turned on.\n */\n _setActiveItemByDelta(delta) {\n this._wrap ? this._setActiveInWrapMode(delta) : this._setActiveInDefaultMode(delta);\n }\n /**\n * Sets the active item properly given \"wrap\" mode. In other words, it will continue to move\n * down the list until it finds an item that is not disabled, and it will wrap if it\n * encounters either end of the list.\n */\n _setActiveInWrapMode(delta) {\n const items = this._getItemsArray();\n for (let i = 1; i <= items.length; i++) {\n const index = (this._activeItemIndex + delta * i + items.length) % items.length;\n const item = items[index];\n if (!this._skipPredicateFn(item)) {\n this.setActiveItem(index);\n return;\n }\n }\n }\n /**\n * Sets the active item properly given the default mode. In other words, it will\n * continue to move down the list until it finds an item that is not disabled. If\n * it encounters either end of the list, it will stop and not wrap.\n */\n _setActiveInDefaultMode(delta) {\n this._setActiveItemByIndex(this._activeItemIndex + delta, delta);\n }\n /**\n * Sets the active item to the first enabled item starting at the index specified. If the\n * item is disabled, it will move in the fallbackDelta direction until it either\n * finds an enabled item or encounters the end of the list.\n */\n _setActiveItemByIndex(index, fallbackDelta) {\n const items = this._getItemsArray();\n if (!items[index]) {\n return;\n }\n while (this._skipPredicateFn(items[index])) {\n index += fallbackDelta;\n if (!items[index]) {\n return;\n }\n }\n this.setActiveItem(index);\n }\n /** Returns the items as an array. */\n _getItemsArray() {\n return this._items instanceof QueryList ? this._items.toArray() : this._items;\n }\n}\nclass ActiveDescendantKeyManager extends ListKeyManager {\n setActiveItem(index) {\n if (this.activeItem) {\n this.activeItem.setInactiveStyles();\n }\n super.setActiveItem(index);\n if (this.activeItem) {\n this.activeItem.setActiveStyles();\n }\n }\n}\nclass FocusKeyManager extends ListKeyManager {\n constructor() {\n super(...arguments);\n this._origin = 'program';\n }\n /**\n * Sets the focus origin that will be passed in to the items for any subsequent `focus` calls.\n * @param origin Focus origin to be used when focusing items.\n */\n setFocusOrigin(origin) {\n this._origin = origin;\n return this;\n }\n setActiveItem(item) {\n super.setActiveItem(item);\n if (this.activeItem) {\n this.activeItem.focus(this._origin);\n }\n }\n}\n\n/**\n * Configuration for the isFocusable method.\n */\nclass IsFocusableConfig {\n constructor() {\n /**\n * Whether to count an element as focusable even if it is not currently visible.\n */\n this.ignoreVisibility = false;\n }\n}\n// The InteractivityChecker leans heavily on the ally.js accessibility utilities.\n// Methods like `isTabbable` are only covering specific edge-cases for the browsers which are\n// supported.\n/**\n * Utility for checking the interactivity of an element, such as whether it is focusable or\n * tabbable.\n */\nclass InteractivityChecker {\n constructor(_platform) {\n this._platform = _platform;\n }\n /**\n * Gets whether an element is disabled.\n *\n * @param element Element to be checked.\n * @returns Whether the element is disabled.\n */\n isDisabled(element) {\n // This does not capture some cases, such as a non-form control with a disabled attribute or\n // a form control inside of a disabled form, but should capture the most common cases.\n return element.hasAttribute('disabled');\n }\n /**\n * Gets whether an element is visible for the purposes of interactivity.\n *\n * This will capture states like `display: none` and `visibility: hidden`, but not things like\n * being clipped by an `overflow: hidden` parent or being outside the viewport.\n *\n * @returns Whether the element is visible.\n */\n isVisible(element) {\n return hasGeometry(element) && getComputedStyle(element).visibility === 'visible';\n }\n /**\n * Gets whether an element can be reached via Tab key.\n * Assumes that the element has already been checked with isFocusable.\n *\n * @param element Element to be checked.\n * @returns Whether the element is tabbable.\n */\n isTabbable(element) {\n // Nothing is tabbable on the server 😎\n if (!this._platform.isBrowser) {\n return false;\n }\n const frameElement = getFrameElement(getWindow(element));\n if (frameElement) {\n // Frame elements inherit their tabindex onto all child elements.\n if (getTabIndexValue(frameElement) === -1) {\n return false;\n }\n // Browsers disable tabbing to an element inside of an invisible frame.\n if (!this.isVisible(frameElement)) {\n return false;\n }\n }\n let nodeName = element.nodeName.toLowerCase();\n let tabIndexValue = getTabIndexValue(element);\n if (element.hasAttribute('contenteditable')) {\n return tabIndexValue !== -1;\n }\n if (nodeName === 'iframe' || nodeName === 'object') {\n // The frame or object's content may be tabbable depending on the content, but it's\n // not possibly to reliably detect the content of the frames. We always consider such\n // elements as non-tabbable.\n return false;\n }\n // In iOS, the browser only considers some specific elements as tabbable.\n if (this._platform.WEBKIT && this._platform.IOS && !isPotentiallyTabbableIOS(element)) {\n return false;\n }\n if (nodeName === 'audio') {\n // Audio elements without controls enabled are never tabbable, regardless\n // of the tabindex attribute explicitly being set.\n if (!element.hasAttribute('controls')) {\n return false;\n }\n // Audio elements with controls are by default tabbable unless the\n // tabindex attribute is set to `-1` explicitly.\n return tabIndexValue !== -1;\n }\n if (nodeName === 'video') {\n // For all video elements, if the tabindex attribute is set to `-1`, the video\n // is not tabbable. Note: We cannot rely on the default `HTMLElement.tabIndex`\n // property as that one is set to `-1` in Chrome, Edge and Safari v13.1. The\n // tabindex attribute is the source of truth here.\n if (tabIndexValue === -1) {\n return false;\n }\n // If the tabindex is explicitly set, and not `-1` (as per check before), the\n // video element is always tabbable (regardless of whether it has controls or not).\n if (tabIndexValue !== null) {\n return true;\n }\n // Otherwise (when no explicit tabindex is set), a video is only tabbable if it\n // has controls enabled. Firefox is special as videos are always tabbable regardless\n // of whether there are controls or not.\n return this._platform.FIREFOX || element.hasAttribute('controls');\n }\n return element.tabIndex >= 0;\n }\n /**\n * Gets whether an element can be focused by the user.\n *\n * @param element Element to be checked.\n * @param config The config object with options to customize this method's behavior\n * @returns Whether the element is focusable.\n */\n isFocusable(element, config) {\n // Perform checks in order of left to most expensive.\n // Again, naive approach that does not capture many edge cases and browser quirks.\n return isPotentiallyFocusable(element) && !this.isDisabled(element) && (config?.ignoreVisibility || this.isVisible(element));\n }\n static {\n this.ɵfac = function InteractivityChecker_Factory(ɵt) {\n return new (ɵt || InteractivityChecker)(i0.ɵɵinject(i1.Platform));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: InteractivityChecker,\n factory: InteractivityChecker.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(InteractivityChecker, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: i1.Platform\n }];\n }, null);\n})();\n/**\n * Returns the frame element from a window object. Since browsers like MS Edge throw errors if\n * the frameElement property is being accessed from a different host address, this property\n * should be accessed carefully.\n */\nfunction getFrameElement(window) {\n try {\n return window.frameElement;\n } catch {\n return null;\n }\n}\n/** Checks whether the specified element has any geometry / rectangles. */\nfunction hasGeometry(element) {\n // Use logic from jQuery to check for an invisible element.\n // See https://github.com/jquery/jquery/blob/master/src/css/hiddenVisibleSelectors.js#L12\n return !!(element.offsetWidth || element.offsetHeight || typeof element.getClientRects === 'function' && element.getClientRects().length);\n}\n/** Gets whether an element's */\nfunction isNativeFormElement(element) {\n let nodeName = element.nodeName.toLowerCase();\n return nodeName === 'input' || nodeName === 'select' || nodeName === 'button' || nodeName === 'textarea';\n}\n/** Gets whether an element is an ``. */\nfunction isHiddenInput(element) {\n return isInputElement(element) && element.type == 'hidden';\n}\n/** Gets whether an element is an anchor that has an href attribute. */\nfunction isAnchorWithHref(element) {\n return isAnchorElement(element) && element.hasAttribute('href');\n}\n/** Gets whether an element is an input element. */\nfunction isInputElement(element) {\n return element.nodeName.toLowerCase() == 'input';\n}\n/** Gets whether an element is an anchor element. */\nfunction isAnchorElement(element) {\n return element.nodeName.toLowerCase() == 'a';\n}\n/** Gets whether an element has a valid tabindex. */\nfunction hasValidTabIndex(element) {\n if (!element.hasAttribute('tabindex') || element.tabIndex === undefined) {\n return false;\n }\n let tabIndex = element.getAttribute('tabindex');\n return !!(tabIndex && !isNaN(parseInt(tabIndex, 10)));\n}\n/**\n * Returns the parsed tabindex from the element attributes instead of returning the\n * evaluated tabindex from the browsers defaults.\n */\nfunction getTabIndexValue(element) {\n if (!hasValidTabIndex(element)) {\n return null;\n }\n // See browser issue in Gecko https://bugzilla.mozilla.org/show_bug.cgi?id=1128054\n const tabIndex = parseInt(element.getAttribute('tabindex') || '', 10);\n return isNaN(tabIndex) ? -1 : tabIndex;\n}\n/** Checks whether the specified element is potentially tabbable on iOS */\nfunction isPotentiallyTabbableIOS(element) {\n let nodeName = element.nodeName.toLowerCase();\n let inputType = nodeName === 'input' && element.type;\n return inputType === 'text' || inputType === 'password' || nodeName === 'select' || nodeName === 'textarea';\n}\n/**\n * Gets whether an element is potentially focusable without taking current visible/disabled state\n * into account.\n */\nfunction isPotentiallyFocusable(element) {\n // Inputs are potentially focusable *unless* they're type=\"hidden\".\n if (isHiddenInput(element)) {\n return false;\n }\n return isNativeFormElement(element) || isAnchorWithHref(element) || element.hasAttribute('contenteditable') || hasValidTabIndex(element);\n}\n/** Gets the parent window of a DOM node with regards of being inside of an iframe. */\nfunction getWindow(node) {\n // ownerDocument is null if `node` itself *is* a document.\n return node.ownerDocument && node.ownerDocument.defaultView || window;\n}\n\n/**\n * Class that allows for trapping focus within a DOM element.\n *\n * This class currently uses a relatively simple approach to focus trapping.\n * It assumes that the tab order is the same as DOM order, which is not necessarily true.\n * Things like `tabIndex > 0`, flex `order`, and shadow roots can cause the two to be misaligned.\n *\n * @deprecated Use `ConfigurableFocusTrap` instead.\n * @breaking-change 11.0.0\n */\nclass FocusTrap {\n /** Whether the focus trap is active. */\n get enabled() {\n return this._enabled;\n }\n set enabled(value) {\n this._enabled = value;\n if (this._startAnchor && this._endAnchor) {\n this._toggleAnchorTabIndex(value, this._startAnchor);\n this._toggleAnchorTabIndex(value, this._endAnchor);\n }\n }\n constructor(_element, _checker, _ngZone, _document, deferAnchors = false) {\n this._element = _element;\n this._checker = _checker;\n this._ngZone = _ngZone;\n this._document = _document;\n this._hasAttached = false;\n // Event listeners for the anchors. Need to be regular functions so that we can unbind them later.\n this.startAnchorListener = () => this.focusLastTabbableElement();\n this.endAnchorListener = () => this.focusFirstTabbableElement();\n this._enabled = true;\n if (!deferAnchors) {\n this.attachAnchors();\n }\n }\n /** Destroys the focus trap by cleaning up the anchors. */\n destroy() {\n const startAnchor = this._startAnchor;\n const endAnchor = this._endAnchor;\n if (startAnchor) {\n startAnchor.removeEventListener('focus', this.startAnchorListener);\n startAnchor.remove();\n }\n if (endAnchor) {\n endAnchor.removeEventListener('focus', this.endAnchorListener);\n endAnchor.remove();\n }\n this._startAnchor = this._endAnchor = null;\n this._hasAttached = false;\n }\n /**\n * Inserts the anchors into the DOM. This is usually done automatically\n * in the constructor, but can be deferred for cases like directives with `*ngIf`.\n * @returns Whether the focus trap managed to attach successfully. This may not be the case\n * if the target element isn't currently in the DOM.\n */\n attachAnchors() {\n // If we're not on the browser, there can be no focus to trap.\n if (this._hasAttached) {\n return true;\n }\n this._ngZone.runOutsideAngular(() => {\n if (!this._startAnchor) {\n this._startAnchor = this._createAnchor();\n this._startAnchor.addEventListener('focus', this.startAnchorListener);\n }\n if (!this._endAnchor) {\n this._endAnchor = this._createAnchor();\n this._endAnchor.addEventListener('focus', this.endAnchorListener);\n }\n });\n if (this._element.parentNode) {\n this._element.parentNode.insertBefore(this._startAnchor, this._element);\n this._element.parentNode.insertBefore(this._endAnchor, this._element.nextSibling);\n this._hasAttached = true;\n }\n return this._hasAttached;\n }\n /**\n * Waits for the zone to stabilize, then focuses the first tabbable element.\n * @returns Returns a promise that resolves with a boolean, depending\n * on whether focus was moved successfully.\n */\n focusInitialElementWhenReady(options) {\n return new Promise(resolve => {\n this._executeOnStable(() => resolve(this.focusInitialElement(options)));\n });\n }\n /**\n * Waits for the zone to stabilize, then focuses\n * the first tabbable element within the focus trap region.\n * @returns Returns a promise that resolves with a boolean, depending\n * on whether focus was moved successfully.\n */\n focusFirstTabbableElementWhenReady(options) {\n return new Promise(resolve => {\n this._executeOnStable(() => resolve(this.focusFirstTabbableElement(options)));\n });\n }\n /**\n * Waits for the zone to stabilize, then focuses\n * the last tabbable element within the focus trap region.\n * @returns Returns a promise that resolves with a boolean, depending\n * on whether focus was moved successfully.\n */\n focusLastTabbableElementWhenReady(options) {\n return new Promise(resolve => {\n this._executeOnStable(() => resolve(this.focusLastTabbableElement(options)));\n });\n }\n /**\n * Get the specified boundary element of the trapped region.\n * @param bound The boundary to get (start or end of trapped region).\n * @returns The boundary element.\n */\n _getRegionBoundary(bound) {\n // Contains the deprecated version of selector, for temporary backwards comparability.\n const markers = this._element.querySelectorAll(`[cdk-focus-region-${bound}], ` + `[cdkFocusRegion${bound}], ` + `[cdk-focus-${bound}]`);\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n for (let i = 0; i < markers.length; i++) {\n // @breaking-change 8.0.0\n if (markers[i].hasAttribute(`cdk-focus-${bound}`)) {\n console.warn(`Found use of deprecated attribute 'cdk-focus-${bound}', ` + `use 'cdkFocusRegion${bound}' instead. The deprecated ` + `attribute will be removed in 8.0.0.`, markers[i]);\n } else if (markers[i].hasAttribute(`cdk-focus-region-${bound}`)) {\n console.warn(`Found use of deprecated attribute 'cdk-focus-region-${bound}', ` + `use 'cdkFocusRegion${bound}' instead. The deprecated attribute ` + `will be removed in 8.0.0.`, markers[i]);\n }\n }\n }\n if (bound == 'start') {\n return markers.length ? markers[0] : this._getFirstTabbableElement(this._element);\n }\n return markers.length ? markers[markers.length - 1] : this._getLastTabbableElement(this._element);\n }\n /**\n * Focuses the element that should be focused when the focus trap is initialized.\n * @returns Whether focus was moved successfully.\n */\n focusInitialElement(options) {\n // Contains the deprecated version of selector, for temporary backwards comparability.\n const redirectToElement = this._element.querySelector(`[cdk-focus-initial], ` + `[cdkFocusInitial]`);\n if (redirectToElement) {\n // @breaking-change 8.0.0\n if ((typeof ngDevMode === 'undefined' || ngDevMode) && redirectToElement.hasAttribute(`cdk-focus-initial`)) {\n console.warn(`Found use of deprecated attribute 'cdk-focus-initial', ` + `use 'cdkFocusInitial' instead. The deprecated attribute ` + `will be removed in 8.0.0`, redirectToElement);\n }\n // Warn the consumer if the element they've pointed to\n // isn't focusable, when not in production mode.\n if ((typeof ngDevMode === 'undefined' || ngDevMode) && !this._checker.isFocusable(redirectToElement)) {\n console.warn(`Element matching '[cdkFocusInitial]' is not focusable.`, redirectToElement);\n }\n if (!this._checker.isFocusable(redirectToElement)) {\n const focusableChild = this._getFirstTabbableElement(redirectToElement);\n focusableChild?.focus(options);\n return !!focusableChild;\n }\n redirectToElement.focus(options);\n return true;\n }\n return this.focusFirstTabbableElement(options);\n }\n /**\n * Focuses the first tabbable element within the focus trap region.\n * @returns Whether focus was moved successfully.\n */\n focusFirstTabbableElement(options) {\n const redirectToElement = this._getRegionBoundary('start');\n if (redirectToElement) {\n redirectToElement.focus(options);\n }\n return !!redirectToElement;\n }\n /**\n * Focuses the last tabbable element within the focus trap region.\n * @returns Whether focus was moved successfully.\n */\n focusLastTabbableElement(options) {\n const redirectToElement = this._getRegionBoundary('end');\n if (redirectToElement) {\n redirectToElement.focus(options);\n }\n return !!redirectToElement;\n }\n /**\n * Checks whether the focus trap has successfully been attached.\n */\n hasAttached() {\n return this._hasAttached;\n }\n /** Get the first tabbable element from a DOM subtree (inclusive). */\n _getFirstTabbableElement(root) {\n if (this._checker.isFocusable(root) && this._checker.isTabbable(root)) {\n return root;\n }\n const children = root.children;\n for (let i = 0; i < children.length; i++) {\n const tabbableChild = children[i].nodeType === this._document.ELEMENT_NODE ? this._getFirstTabbableElement(children[i]) : null;\n if (tabbableChild) {\n return tabbableChild;\n }\n }\n return null;\n }\n /** Get the last tabbable element from a DOM subtree (inclusive). */\n _getLastTabbableElement(root) {\n if (this._checker.isFocusable(root) && this._checker.isTabbable(root)) {\n return root;\n }\n // Iterate in reverse DOM order.\n const children = root.children;\n for (let i = children.length - 1; i >= 0; i--) {\n const tabbableChild = children[i].nodeType === this._document.ELEMENT_NODE ? this._getLastTabbableElement(children[i]) : null;\n if (tabbableChild) {\n return tabbableChild;\n }\n }\n return null;\n }\n /** Creates an anchor element. */\n _createAnchor() {\n const anchor = this._document.createElement('div');\n this._toggleAnchorTabIndex(this._enabled, anchor);\n anchor.classList.add('cdk-visually-hidden');\n anchor.classList.add('cdk-focus-trap-anchor');\n anchor.setAttribute('aria-hidden', 'true');\n return anchor;\n }\n /**\n * Toggles the `tabindex` of an anchor, based on the enabled state of the focus trap.\n * @param isEnabled Whether the focus trap is enabled.\n * @param anchor Anchor on which to toggle the tabindex.\n */\n _toggleAnchorTabIndex(isEnabled, anchor) {\n // Remove the tabindex completely, rather than setting it to -1, because if the\n // element has a tabindex, the user might still hit it when navigating with the arrow keys.\n isEnabled ? anchor.setAttribute('tabindex', '0') : anchor.removeAttribute('tabindex');\n }\n /**\n * Toggles the`tabindex` of both anchors to either trap Tab focus or allow it to escape.\n * @param enabled: Whether the anchors should trap Tab.\n */\n toggleAnchors(enabled) {\n if (this._startAnchor && this._endAnchor) {\n this._toggleAnchorTabIndex(enabled, this._startAnchor);\n this._toggleAnchorTabIndex(enabled, this._endAnchor);\n }\n }\n /** Executes a function when the zone is stable. */\n _executeOnStable(fn) {\n if (this._ngZone.isStable) {\n fn();\n } else {\n this._ngZone.onStable.pipe(take(1)).subscribe(fn);\n }\n }\n}\n/**\n * Factory that allows easy instantiation of focus traps.\n * @deprecated Use `ConfigurableFocusTrapFactory` instead.\n * @breaking-change 11.0.0\n */\nclass FocusTrapFactory {\n constructor(_checker, _ngZone, _document) {\n this._checker = _checker;\n this._ngZone = _ngZone;\n this._document = _document;\n }\n /**\n * Creates a focus-trapped region around the given element.\n * @param element The element around which focus will be trapped.\n * @param deferCaptureElements Defers the creation of focus-capturing elements to be done\n * manually by the user.\n * @returns The created focus trap instance.\n */\n create(element, deferCaptureElements = false) {\n return new FocusTrap(element, this._checker, this._ngZone, this._document, deferCaptureElements);\n }\n static {\n this.ɵfac = function FocusTrapFactory_Factory(ɵt) {\n return new (ɵt || FocusTrapFactory)(i0.ɵɵinject(InteractivityChecker), i0.ɵɵinject(i0.NgZone), i0.ɵɵinject(DOCUMENT));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: FocusTrapFactory,\n factory: FocusTrapFactory.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(FocusTrapFactory, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: InteractivityChecker\n }, {\n type: i0.NgZone\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }];\n }, null);\n})();\n/** Directive for trapping focus within a region. */\nclass CdkTrapFocus {\n /** Whether the focus trap is active. */\n get enabled() {\n return this.focusTrap.enabled;\n }\n set enabled(value) {\n this.focusTrap.enabled = coerceBooleanProperty(value);\n }\n /**\n * Whether the directive should automatically move focus into the trapped region upon\n * initialization and return focus to the previous activeElement upon destruction.\n */\n get autoCapture() {\n return this._autoCapture;\n }\n set autoCapture(value) {\n this._autoCapture = coerceBooleanProperty(value);\n }\n constructor(_elementRef, _focusTrapFactory,\n /**\n * @deprecated No longer being used. To be removed.\n * @breaking-change 13.0.0\n */\n _document) {\n this._elementRef = _elementRef;\n this._focusTrapFactory = _focusTrapFactory;\n /** Previously focused element to restore focus to upon destroy when using autoCapture. */\n this._previouslyFocusedElement = null;\n this.focusTrap = this._focusTrapFactory.create(this._elementRef.nativeElement, true);\n }\n ngOnDestroy() {\n this.focusTrap.destroy();\n // If we stored a previously focused element when using autoCapture, return focus to that\n // element now that the trapped region is being destroyed.\n if (this._previouslyFocusedElement) {\n this._previouslyFocusedElement.focus();\n this._previouslyFocusedElement = null;\n }\n }\n ngAfterContentInit() {\n this.focusTrap.attachAnchors();\n if (this.autoCapture) {\n this._captureFocus();\n }\n }\n ngDoCheck() {\n if (!this.focusTrap.hasAttached()) {\n this.focusTrap.attachAnchors();\n }\n }\n ngOnChanges(changes) {\n const autoCaptureChange = changes['autoCapture'];\n if (autoCaptureChange && !autoCaptureChange.firstChange && this.autoCapture && this.focusTrap.hasAttached()) {\n this._captureFocus();\n }\n }\n _captureFocus() {\n this._previouslyFocusedElement = _getFocusedElementPierceShadowDom();\n this.focusTrap.focusInitialElementWhenReady();\n }\n static {\n this.ɵfac = function CdkTrapFocus_Factory(ɵt) {\n return new (ɵt || CdkTrapFocus)(i0.ɵɵdirectiveInject(i0.ElementRef), i0.ɵɵdirectiveInject(FocusTrapFactory), i0.ɵɵdirectiveInject(DOCUMENT));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkTrapFocus,\n selectors: [[\"\", \"cdkTrapFocus\", \"\"]],\n inputs: {\n enabled: [0, \"cdkTrapFocus\", \"enabled\"],\n autoCapture: [0, \"cdkTrapFocusAutoCapture\", \"autoCapture\"]\n },\n exportAs: [\"cdkTrapFocus\"],\n features: [i0.ɵɵNgOnChangesFeature]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkTrapFocus, [{\n type: Directive,\n args: [{\n selector: '[cdkTrapFocus]',\n exportAs: 'cdkTrapFocus'\n }]\n }], function () {\n return [{\n type: i0.ElementRef\n }, {\n type: FocusTrapFactory\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }];\n }, {\n enabled: [{\n type: Input,\n args: ['cdkTrapFocus']\n }],\n autoCapture: [{\n type: Input,\n args: ['cdkTrapFocusAutoCapture']\n }]\n });\n})();\n\n/**\n * Class that allows for trapping focus within a DOM element.\n *\n * This class uses a strategy pattern that determines how it traps focus.\n * See FocusTrapInertStrategy.\n */\nclass ConfigurableFocusTrap extends FocusTrap {\n /** Whether the FocusTrap is enabled. */\n get enabled() {\n return this._enabled;\n }\n set enabled(value) {\n this._enabled = value;\n if (this._enabled) {\n this._focusTrapManager.register(this);\n } else {\n this._focusTrapManager.deregister(this);\n }\n }\n constructor(_element, _checker, _ngZone, _document, _focusTrapManager, _inertStrategy, config) {\n super(_element, _checker, _ngZone, _document, config.defer);\n this._focusTrapManager = _focusTrapManager;\n this._inertStrategy = _inertStrategy;\n this._focusTrapManager.register(this);\n }\n /** Notifies the FocusTrapManager that this FocusTrap will be destroyed. */\n destroy() {\n this._focusTrapManager.deregister(this);\n super.destroy();\n }\n /** @docs-private Implemented as part of ManagedFocusTrap. */\n _enable() {\n this._inertStrategy.preventFocus(this);\n this.toggleAnchors(true);\n }\n /** @docs-private Implemented as part of ManagedFocusTrap. */\n _disable() {\n this._inertStrategy.allowFocus(this);\n this.toggleAnchors(false);\n }\n}\n\n/** The injection token used to specify the inert strategy. */\nconst FOCUS_TRAP_INERT_STRATEGY = new InjectionToken('FOCUS_TRAP_INERT_STRATEGY');\n\n/**\n * Lightweight FocusTrapInertStrategy that adds a document focus event\n * listener to redirect focus back inside the FocusTrap.\n */\nclass EventListenerFocusTrapInertStrategy {\n constructor() {\n /** Focus event handler. */\n this._listener = null;\n }\n /** Adds a document event listener that keeps focus inside the FocusTrap. */\n preventFocus(focusTrap) {\n // Ensure there's only one listener per document\n if (this._listener) {\n focusTrap._document.removeEventListener('focus', this._listener, true);\n }\n this._listener = e => this._trapFocus(focusTrap, e);\n focusTrap._ngZone.runOutsideAngular(() => {\n focusTrap._document.addEventListener('focus', this._listener, true);\n });\n }\n /** Removes the event listener added in preventFocus. */\n allowFocus(focusTrap) {\n if (!this._listener) {\n return;\n }\n focusTrap._document.removeEventListener('focus', this._listener, true);\n this._listener = null;\n }\n /**\n * Refocuses the first element in the FocusTrap if the focus event target was outside\n * the FocusTrap.\n *\n * This is an event listener callback. The event listener is added in runOutsideAngular,\n * so all this code runs outside Angular as well.\n */\n _trapFocus(focusTrap, event) {\n const target = event.target;\n const focusTrapRoot = focusTrap._element;\n // Don't refocus if target was in an overlay, because the overlay might be associated\n // with an element inside the FocusTrap, ex. mat-select.\n if (target && !focusTrapRoot.contains(target) && !target.closest?.('div.cdk-overlay-pane')) {\n // Some legacy FocusTrap usages have logic that focuses some element on the page\n // just before FocusTrap is destroyed. For backwards compatibility, wait\n // to be sure FocusTrap is still enabled before refocusing.\n setTimeout(() => {\n // Check whether focus wasn't put back into the focus trap while the timeout was pending.\n if (focusTrap.enabled && !focusTrapRoot.contains(focusTrap._document.activeElement)) {\n focusTrap.focusFirstTabbableElement();\n }\n });\n }\n }\n}\n\n/** Injectable that ensures only the most recently enabled FocusTrap is active. */\nclass FocusTrapManager {\n constructor() {\n // A stack of the FocusTraps on the page. Only the FocusTrap at the\n // top of the stack is active.\n this._focusTrapStack = [];\n }\n /**\n * Disables the FocusTrap at the top of the stack, and then pushes\n * the new FocusTrap onto the stack.\n */\n register(focusTrap) {\n // Dedupe focusTraps that register multiple times.\n this._focusTrapStack = this._focusTrapStack.filter(ft => ft !== focusTrap);\n let stack = this._focusTrapStack;\n if (stack.length) {\n stack[stack.length - 1]._disable();\n }\n stack.push(focusTrap);\n focusTrap._enable();\n }\n /**\n * Removes the FocusTrap from the stack, and activates the\n * FocusTrap that is the new top of the stack.\n */\n deregister(focusTrap) {\n focusTrap._disable();\n const stack = this._focusTrapStack;\n const i = stack.indexOf(focusTrap);\n if (i !== -1) {\n stack.splice(i, 1);\n if (stack.length) {\n stack[stack.length - 1]._enable();\n }\n }\n }\n static {\n this.ɵfac = function FocusTrapManager_Factory(ɵt) {\n return new (ɵt || FocusTrapManager)();\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: FocusTrapManager,\n factory: FocusTrapManager.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(FocusTrapManager, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], null, null);\n})();\n\n/** Factory that allows easy instantiation of configurable focus traps. */\nclass ConfigurableFocusTrapFactory {\n constructor(_checker, _ngZone, _focusTrapManager, _document, _inertStrategy) {\n this._checker = _checker;\n this._ngZone = _ngZone;\n this._focusTrapManager = _focusTrapManager;\n this._document = _document;\n // TODO split up the strategies into different modules, similar to DateAdapter.\n this._inertStrategy = _inertStrategy || new EventListenerFocusTrapInertStrategy();\n }\n create(element, config = {\n defer: false\n }) {\n let configObject;\n if (typeof config === 'boolean') {\n configObject = {\n defer: config\n };\n } else {\n configObject = config;\n }\n return new ConfigurableFocusTrap(element, this._checker, this._ngZone, this._document, this._focusTrapManager, this._inertStrategy, configObject);\n }\n static {\n this.ɵfac = function ConfigurableFocusTrapFactory_Factory(ɵt) {\n return new (ɵt || ConfigurableFocusTrapFactory)(i0.ɵɵinject(InteractivityChecker), i0.ɵɵinject(i0.NgZone), i0.ɵɵinject(FocusTrapManager), i0.ɵɵinject(DOCUMENT), i0.ɵɵinject(FOCUS_TRAP_INERT_STRATEGY, 8));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: ConfigurableFocusTrapFactory,\n factory: ConfigurableFocusTrapFactory.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(ConfigurableFocusTrapFactory, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: InteractivityChecker\n }, {\n type: i0.NgZone\n }, {\n type: FocusTrapManager\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [FOCUS_TRAP_INERT_STRATEGY]\n }]\n }];\n }, null);\n})();\n\n/** Gets whether an event could be a faked `mousedown` event dispatched by a screen reader. */\nfunction isFakeMousedownFromScreenReader(event) {\n // Some screen readers will dispatch a fake `mousedown` event when pressing enter or space on\n // a clickable element. We can distinguish these events when `event.buttons` is zero, or\n // `event.detail` is zero depending on the browser:\n // - `event.buttons` works on Firefox, but fails on Chrome.\n // - `detail` works on Chrome, but fails on Firefox.\n return event.buttons === 0 || event.detail === 0;\n}\n/** Gets whether an event could be a faked `touchstart` event dispatched by a screen reader. */\nfunction isFakeTouchstartFromScreenReader(event) {\n const touch = event.touches && event.touches[0] || event.changedTouches && event.changedTouches[0];\n // A fake `touchstart` can be distinguished from a real one by looking at the `identifier`\n // which is typically >= 0 on a real device versus -1 from a screen reader. Just to be safe,\n // we can also look at `radiusX` and `radiusY`. This behavior was observed against a Windows 10\n // device with a touch screen running NVDA v2020.4 and Firefox 85 or Chrome 88.\n return !!touch && touch.identifier === -1 && (touch.radiusX == null || touch.radiusX === 1) && (touch.radiusY == null || touch.radiusY === 1);\n}\n\n/**\n * Injectable options for the InputModalityDetector. These are shallowly merged with the default\n * options.\n */\nconst INPUT_MODALITY_DETECTOR_OPTIONS = new InjectionToken('cdk-input-modality-detector-options');\n/**\n * Default options for the InputModalityDetector.\n *\n * Modifier keys are ignored by default (i.e. when pressed won't cause the service to detect\n * keyboard input modality) for two reasons:\n *\n * 1. Modifier keys are commonly used with mouse to perform actions such as 'right click' or 'open\n * in new tab', and are thus less representative of actual keyboard interaction.\n * 2. VoiceOver triggers some keyboard events when linearly navigating with Control + Option (but\n * confusingly not with Caps Lock). Thus, to have parity with other screen readers, we ignore\n * these keys so as to not update the input modality.\n *\n * Note that we do not by default ignore the right Meta key on Safari because it has the same key\n * code as the ContextMenu key on other browsers. When we switch to using event.key, we can\n * distinguish between the two.\n */\nconst INPUT_MODALITY_DETECTOR_DEFAULT_OPTIONS = {\n ignoreKeys: [ALT, CONTROL, MAC_META, META, SHIFT]\n};\n/**\n * The amount of time needed to pass after a touchstart event in order for a subsequent mousedown\n * event to be attributed as mouse and not touch.\n *\n * This is the value used by AngularJS Material. Through trial and error (on iPhone 6S) they found\n * that a value of around 650ms seems appropriate.\n */\nconst TOUCH_BUFFER_MS = 650;\n/**\n * Event listener options that enable capturing and also mark the listener as passive if the browser\n * supports it.\n */\nconst modalityEventListenerOptions = normalizePassiveListenerOptions({\n passive: true,\n capture: true\n});\n/**\n * Service that detects the user's input modality.\n *\n * This service does not update the input modality when a user navigates with a screen reader\n * (e.g. linear navigation with VoiceOver, object navigation / browse mode with NVDA, virtual PC\n * cursor mode with JAWS). This is in part due to technical limitations (i.e. keyboard events do not\n * fire as expected in these modes) but is also arguably the correct behavior. Navigating with a\n * screen reader is akin to visually scanning a page, and should not be interpreted as actual user\n * input interaction.\n *\n * When a user is not navigating but *interacting* with a screen reader, this service attempts to\n * update the input modality to keyboard, but in general this service's behavior is largely\n * undefined.\n */\nclass InputModalityDetector {\n /** The most recently detected input modality. */\n get mostRecentModality() {\n return this._modality.value;\n }\n constructor(_platform, ngZone, document, options) {\n this._platform = _platform;\n /**\n * The most recently detected input modality event target. Is null if no input modality has been\n * detected or if the associated event target is null for some unknown reason.\n */\n this._mostRecentTarget = null;\n /** The underlying BehaviorSubject that emits whenever an input modality is detected. */\n this._modality = new BehaviorSubject(null);\n /**\n * The timestamp of the last touch input modality. Used to determine whether mousedown events\n * should be attributed to mouse or touch.\n */\n this._lastTouchMs = 0;\n /**\n * Handles keydown events. Must be an arrow function in order to preserve the context when it gets\n * bound.\n */\n this._onKeydown = event => {\n // If this is one of the keys we should ignore, then ignore it and don't update the input\n // modality to keyboard.\n if (this._options?.ignoreKeys?.some(keyCode => keyCode === event.keyCode)) {\n return;\n }\n this._modality.next('keyboard');\n this._mostRecentTarget = _getEventTarget(event);\n };\n /**\n * Handles mousedown events. Must be an arrow function in order to preserve the context when it\n * gets bound.\n */\n this._onMousedown = event => {\n // Touches trigger both touch and mouse events, so we need to distinguish between mouse events\n // that were triggered via mouse vs touch. To do so, check if the mouse event occurs closely\n // after the previous touch event.\n if (Date.now() - this._lastTouchMs < TOUCH_BUFFER_MS) {\n return;\n }\n // Fake mousedown events are fired by some screen readers when controls are activated by the\n // screen reader. Attribute them to keyboard input modality.\n this._modality.next(isFakeMousedownFromScreenReader(event) ? 'keyboard' : 'mouse');\n this._mostRecentTarget = _getEventTarget(event);\n };\n /**\n * Handles touchstart events. Must be an arrow function in order to preserve the context when it\n * gets bound.\n */\n this._onTouchstart = event => {\n // Same scenario as mentioned in _onMousedown, but on touch screen devices, fake touchstart\n // events are fired. Again, attribute to keyboard input modality.\n if (isFakeTouchstartFromScreenReader(event)) {\n this._modality.next('keyboard');\n return;\n }\n // Store the timestamp of this touch event, as it's used to distinguish between mouse events\n // triggered via mouse vs touch.\n this._lastTouchMs = Date.now();\n this._modality.next('touch');\n this._mostRecentTarget = _getEventTarget(event);\n };\n this._options = {\n ...INPUT_MODALITY_DETECTOR_DEFAULT_OPTIONS,\n ...options\n };\n // Skip the first emission as it's null.\n this.modalityDetected = this._modality.pipe(skip(1));\n this.modalityChanged = this.modalityDetected.pipe(distinctUntilChanged());\n // If we're not in a browser, this service should do nothing, as there's no relevant input\n // modality to detect.\n if (_platform.isBrowser) {\n ngZone.runOutsideAngular(() => {\n document.addEventListener('keydown', this._onKeydown, modalityEventListenerOptions);\n document.addEventListener('mousedown', this._onMousedown, modalityEventListenerOptions);\n document.addEventListener('touchstart', this._onTouchstart, modalityEventListenerOptions);\n });\n }\n }\n ngOnDestroy() {\n this._modality.complete();\n if (this._platform.isBrowser) {\n document.removeEventListener('keydown', this._onKeydown, modalityEventListenerOptions);\n document.removeEventListener('mousedown', this._onMousedown, modalityEventListenerOptions);\n document.removeEventListener('touchstart', this._onTouchstart, modalityEventListenerOptions);\n }\n }\n static {\n this.ɵfac = function InputModalityDetector_Factory(ɵt) {\n return new (ɵt || InputModalityDetector)(i0.ɵɵinject(i1.Platform), i0.ɵɵinject(i0.NgZone), i0.ɵɵinject(DOCUMENT), i0.ɵɵinject(INPUT_MODALITY_DETECTOR_OPTIONS, 8));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: InputModalityDetector,\n factory: InputModalityDetector.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(InputModalityDetector, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: i1.Platform\n }, {\n type: i0.NgZone\n }, {\n type: Document,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [INPUT_MODALITY_DETECTOR_OPTIONS]\n }]\n }];\n }, null);\n})();\nconst LIVE_ANNOUNCER_ELEMENT_TOKEN = new InjectionToken('liveAnnouncerElement', {\n providedIn: 'root',\n factory: LIVE_ANNOUNCER_ELEMENT_TOKEN_FACTORY\n});\n/** @docs-private */\nfunction LIVE_ANNOUNCER_ELEMENT_TOKEN_FACTORY() {\n return null;\n}\n/** Injection token that can be used to configure the default options for the LiveAnnouncer. */\nconst LIVE_ANNOUNCER_DEFAULT_OPTIONS = new InjectionToken('LIVE_ANNOUNCER_DEFAULT_OPTIONS');\nlet uniqueIds = 0;\nclass LiveAnnouncer {\n constructor(elementToken, _ngZone, _document, _defaultOptions) {\n this._ngZone = _ngZone;\n this._defaultOptions = _defaultOptions;\n // We inject the live element and document as `any` because the constructor signature cannot\n // reference browser globals (HTMLElement, Document) on non-browser environments, since having\n // a class decorator causes TypeScript to preserve the constructor signature types.\n this._document = _document;\n this._liveElement = elementToken || this._createLiveElement();\n }\n announce(message, ...args) {\n const defaultOptions = this._defaultOptions;\n let politeness;\n let duration;\n if (args.length === 1 && typeof args[0] === 'number') {\n duration = args[0];\n } else {\n [politeness, duration] = args;\n }\n this.clear();\n clearTimeout(this._previousTimeout);\n if (!politeness) {\n politeness = defaultOptions && defaultOptions.politeness ? defaultOptions.politeness : 'polite';\n }\n if (duration == null && defaultOptions) {\n duration = defaultOptions.duration;\n }\n // TODO: ensure changing the politeness works on all environments we support.\n this._liveElement.setAttribute('aria-live', politeness);\n if (this._liveElement.id) {\n this._exposeAnnouncerToModals(this._liveElement.id);\n }\n // This 100ms timeout is necessary for some browser + screen-reader combinations:\n // - Both JAWS and NVDA over IE11 will not announce anything without a non-zero timeout.\n // - With Chrome and IE11 with NVDA or JAWS, a repeated (identical) message won't be read a\n // second time without clearing and then using a non-zero delay.\n // (using JAWS 17 at time of this writing).\n return this._ngZone.runOutsideAngular(() => {\n if (!this._currentPromise) {\n this._currentPromise = new Promise(resolve => this._currentResolve = resolve);\n }\n clearTimeout(this._previousTimeout);\n this._previousTimeout = setTimeout(() => {\n this._liveElement.textContent = message;\n if (typeof duration === 'number') {\n this._previousTimeout = setTimeout(() => this.clear(), duration);\n }\n this._currentResolve();\n this._currentPromise = this._currentResolve = undefined;\n }, 100);\n return this._currentPromise;\n });\n }\n /**\n * Clears the current text from the announcer element. Can be used to prevent\n * screen readers from reading the text out again while the user is going\n * through the page landmarks.\n */\n clear() {\n if (this._liveElement) {\n this._liveElement.textContent = '';\n }\n }\n ngOnDestroy() {\n clearTimeout(this._previousTimeout);\n this._liveElement?.remove();\n this._liveElement = null;\n this._currentResolve?.();\n this._currentPromise = this._currentResolve = undefined;\n }\n _createLiveElement() {\n const elementClass = 'cdk-live-announcer-element';\n const previousElements = this._document.getElementsByClassName(elementClass);\n const liveEl = this._document.createElement('div');\n // Remove any old containers. This can happen when coming in from a server-side-rendered page.\n for (let i = 0; i < previousElements.length; i++) {\n previousElements[i].remove();\n }\n liveEl.classList.add(elementClass);\n liveEl.classList.add('cdk-visually-hidden');\n liveEl.setAttribute('aria-atomic', 'true');\n liveEl.setAttribute('aria-live', 'polite');\n liveEl.id = `cdk-live-announcer-${uniqueIds++}`;\n this._document.body.appendChild(liveEl);\n return liveEl;\n }\n /**\n * Some browsers won't expose the accessibility node of the live announcer element if there is an\n * `aria-modal` and the live announcer is outside of it. This method works around the issue by\n * pointing the `aria-owns` of all modals to the live announcer element.\n */\n _exposeAnnouncerToModals(id) {\n // TODO(http://github.com/angular/components/issues/26853): consider de-duplicating this with\n // the `SnakBarContainer` and other usages.\n //\n // Note that the selector here is limited to CDK overlays at the moment in order to reduce the\n // section of the DOM we need to look through. This should cover all the cases we support, but\n // the selector can be expanded if it turns out to be too narrow.\n const modals = this._document.querySelectorAll('body > .cdk-overlay-container [aria-modal=\"true\"]');\n for (let i = 0; i < modals.length; i++) {\n const modal = modals[i];\n const ariaOwns = modal.getAttribute('aria-owns');\n if (!ariaOwns) {\n modal.setAttribute('aria-owns', id);\n } else if (ariaOwns.indexOf(id) === -1) {\n modal.setAttribute('aria-owns', ariaOwns + ' ' + id);\n }\n }\n }\n static {\n this.ɵfac = function LiveAnnouncer_Factory(ɵt) {\n return new (ɵt || LiveAnnouncer)(i0.ɵɵinject(LIVE_ANNOUNCER_ELEMENT_TOKEN, 8), i0.ɵɵinject(i0.NgZone), i0.ɵɵinject(DOCUMENT), i0.ɵɵinject(LIVE_ANNOUNCER_DEFAULT_OPTIONS, 8));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: LiveAnnouncer,\n factory: LiveAnnouncer.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(LiveAnnouncer, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [LIVE_ANNOUNCER_ELEMENT_TOKEN]\n }]\n }, {\n type: i0.NgZone\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [LIVE_ANNOUNCER_DEFAULT_OPTIONS]\n }]\n }];\n }, null);\n})();\n/**\n * A directive that works similarly to aria-live, but uses the LiveAnnouncer to ensure compatibility\n * with a wider range of browsers and screen readers.\n */\nclass CdkAriaLive {\n /** The aria-live politeness level to use when announcing messages. */\n get politeness() {\n return this._politeness;\n }\n set politeness(value) {\n this._politeness = value === 'off' || value === 'assertive' ? value : 'polite';\n if (this._politeness === 'off') {\n if (this._subscription) {\n this._subscription.unsubscribe();\n this._subscription = null;\n }\n } else if (!this._subscription) {\n this._subscription = this._ngZone.runOutsideAngular(() => {\n return this._contentObserver.observe(this._elementRef).subscribe(() => {\n // Note that we use textContent here, rather than innerText, in order to avoid a reflow.\n const elementText = this._elementRef.nativeElement.textContent;\n // The `MutationObserver` fires also for attribute\n // changes which we don't want to announce.\n if (elementText !== this._previousAnnouncedText) {\n this._liveAnnouncer.announce(elementText, this._politeness, this.duration);\n this._previousAnnouncedText = elementText;\n }\n });\n });\n }\n }\n constructor(_elementRef, _liveAnnouncer, _contentObserver, _ngZone) {\n this._elementRef = _elementRef;\n this._liveAnnouncer = _liveAnnouncer;\n this._contentObserver = _contentObserver;\n this._ngZone = _ngZone;\n this._politeness = 'polite';\n }\n ngOnDestroy() {\n if (this._subscription) {\n this._subscription.unsubscribe();\n }\n }\n static {\n this.ɵfac = function CdkAriaLive_Factory(ɵt) {\n return new (ɵt || CdkAriaLive)(i0.ɵɵdirectiveInject(i0.ElementRef), i0.ɵɵdirectiveInject(LiveAnnouncer), i0.ɵɵdirectiveInject(i1$1.ContentObserver), i0.ɵɵdirectiveInject(i0.NgZone));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkAriaLive,\n selectors: [[\"\", \"cdkAriaLive\", \"\"]],\n inputs: {\n politeness: [0, \"cdkAriaLive\", \"politeness\"],\n duration: [0, \"cdkAriaLiveDuration\", \"duration\"]\n },\n exportAs: [\"cdkAriaLive\"]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkAriaLive, [{\n type: Directive,\n args: [{\n selector: '[cdkAriaLive]',\n exportAs: 'cdkAriaLive'\n }]\n }], function () {\n return [{\n type: i0.ElementRef\n }, {\n type: LiveAnnouncer\n }, {\n type: i1$1.ContentObserver\n }, {\n type: i0.NgZone\n }];\n }, {\n politeness: [{\n type: Input,\n args: ['cdkAriaLive']\n }],\n duration: [{\n type: Input,\n args: ['cdkAriaLiveDuration']\n }]\n });\n})();\n\n/** InjectionToken for FocusMonitorOptions. */\nconst FOCUS_MONITOR_DEFAULT_OPTIONS = new InjectionToken('cdk-focus-monitor-default-options');\n/**\n * Event listener options that enable capturing and also\n * mark the listener as passive if the browser supports it.\n */\nconst captureEventListenerOptions = normalizePassiveListenerOptions({\n passive: true,\n capture: true\n});\n/** Monitors mouse and keyboard events to determine the cause of focus events. */\nclass FocusMonitor {\n constructor(_ngZone, _platform, _inputModalityDetector, /** @breaking-change 11.0.0 make document required */\n document, options) {\n this._ngZone = _ngZone;\n this._platform = _platform;\n this._inputModalityDetector = _inputModalityDetector;\n /** The focus origin that the next focus event is a result of. */\n this._origin = null;\n /** Whether the window has just been focused. */\n this._windowFocused = false;\n /**\n * Whether the origin was determined via a touch interaction. Necessary as properly attributing\n * focus events to touch interactions requires special logic.\n */\n this._originFromTouchInteraction = false;\n /** Map of elements being monitored to their info. */\n this._elementInfo = new Map();\n /** The number of elements currently being monitored. */\n this._monitoredElementCount = 0;\n /**\n * Keeps track of the root nodes to which we've currently bound a focus/blur handler,\n * as well as the number of monitored elements that they contain. We have to treat focus/blur\n * handlers differently from the rest of the events, because the browser won't emit events\n * to the document when focus moves inside of a shadow root.\n */\n this._rootNodeFocusListenerCount = new Map();\n /**\n * Event listener for `focus` events on the window.\n * Needs to be an arrow function in order to preserve the context when it gets bound.\n */\n this._windowFocusListener = () => {\n // Make a note of when the window regains focus, so we can\n // restore the origin info for the focused element.\n this._windowFocused = true;\n this._windowFocusTimeoutId = window.setTimeout(() => this._windowFocused = false);\n };\n /** Subject for stopping our InputModalityDetector subscription. */\n this._stopInputModalityDetector = new Subject();\n /**\n * Event listener for `focus` and 'blur' events on the document.\n * Needs to be an arrow function in order to preserve the context when it gets bound.\n */\n this._rootNodeFocusAndBlurListener = event => {\n const target = _getEventTarget(event);\n // We need to walk up the ancestor chain in order to support `checkChildren`.\n for (let element = target; element; element = element.parentElement) {\n if (event.type === 'focus') {\n this._onFocus(event, element);\n } else {\n this._onBlur(event, element);\n }\n }\n };\n this._document = document;\n this._detectionMode = options?.detectionMode || 0 /* FocusMonitorDetectionMode.IMMEDIATE */;\n }\n monitor(element, checkChildren = false) {\n const nativeElement = coerceElement(element);\n // Do nothing if we're not on the browser platform or the passed in node isn't an element.\n if (!this._platform.isBrowser || nativeElement.nodeType !== 1) {\n // Note: we don't want the observable to emit at all so we don't pass any parameters.\n return of();\n }\n // If the element is inside the shadow DOM, we need to bind our focus/blur listeners to\n // the shadow root, rather than the `document`, because the browser won't emit focus events\n // to the `document`, if focus is moving within the same shadow root.\n const rootNode = _getShadowRoot(nativeElement) || this._getDocument();\n const cachedInfo = this._elementInfo.get(nativeElement);\n // Check if we're already monitoring this element.\n if (cachedInfo) {\n if (checkChildren) {\n // TODO(COMP-318): this can be problematic, because it'll turn all non-checkChildren\n // observers into ones that behave as if `checkChildren` was turned on. We need a more\n // robust solution.\n cachedInfo.checkChildren = true;\n }\n return cachedInfo.subject;\n }\n // Create monitored element info.\n const info = {\n checkChildren: checkChildren,\n subject: new Subject(),\n rootNode\n };\n this._elementInfo.set(nativeElement, info);\n this._registerGlobalListeners(info);\n return info.subject;\n }\n stopMonitoring(element) {\n const nativeElement = coerceElement(element);\n const elementInfo = this._elementInfo.get(nativeElement);\n if (elementInfo) {\n elementInfo.subject.complete();\n this._setClasses(nativeElement);\n this._elementInfo.delete(nativeElement);\n this._removeGlobalListeners(elementInfo);\n }\n }\n focusVia(element, origin, options) {\n const nativeElement = coerceElement(element);\n const focusedElement = this._getDocument().activeElement;\n // If the element is focused already, calling `focus` again won't trigger the event listener\n // which means that the focus classes won't be updated. If that's the case, update the classes\n // directly without waiting for an event.\n if (nativeElement === focusedElement) {\n this._getClosestElementsInfo(nativeElement).forEach(([currentElement, info]) => this._originChanged(currentElement, origin, info));\n } else {\n this._setOrigin(origin);\n // `focus` isn't available on the server\n if (typeof nativeElement.focus === 'function') {\n nativeElement.focus(options);\n }\n }\n }\n ngOnDestroy() {\n this._elementInfo.forEach((_info, element) => this.stopMonitoring(element));\n }\n /** Access injected document if available or fallback to global document reference */\n _getDocument() {\n return this._document || document;\n }\n /** Use defaultView of injected document if available or fallback to global window reference */\n _getWindow() {\n const doc = this._getDocument();\n return doc.defaultView || window;\n }\n _getFocusOrigin(focusEventTarget) {\n if (this._origin) {\n // If the origin was realized via a touch interaction, we need to perform additional checks\n // to determine whether the focus origin should be attributed to touch or program.\n if (this._originFromTouchInteraction) {\n return this._shouldBeAttributedToTouch(focusEventTarget) ? 'touch' : 'program';\n } else {\n return this._origin;\n }\n }\n // If the window has just regained focus, we can restore the most recent origin from before the\n // window blurred. Otherwise, we've reached the point where we can't identify the source of the\n // focus. This typically means one of two things happened:\n //\n // 1) The element was programmatically focused, or\n // 2) The element was focused via screen reader navigation (which generally doesn't fire\n // events).\n //\n // Because we can't distinguish between these two cases, we default to setting `program`.\n if (this._windowFocused && this._lastFocusOrigin) {\n return this._lastFocusOrigin;\n }\n // If the interaction is coming from an input label, we consider it a mouse interactions.\n // This is a special case where focus moves on `click`, rather than `mousedown` which breaks\n // our detection, because all our assumptions are for `mousedown`. We need to handle this\n // special case, because it's very common for checkboxes and radio buttons.\n if (focusEventTarget && this._isLastInteractionFromInputLabel(focusEventTarget)) {\n return 'mouse';\n }\n return 'program';\n }\n /**\n * Returns whether the focus event should be attributed to touch. Recall that in IMMEDIATE mode, a\n * touch origin isn't immediately reset at the next tick (see _setOrigin). This means that when we\n * handle a focus event following a touch interaction, we need to determine whether (1) the focus\n * event was directly caused by the touch interaction or (2) the focus event was caused by a\n * subsequent programmatic focus call triggered by the touch interaction.\n * @param focusEventTarget The target of the focus event under examination.\n */\n _shouldBeAttributedToTouch(focusEventTarget) {\n // Please note that this check is not perfect. Consider the following edge case:\n //\n //
\n //
\n //
\n //\n // Suppose there is a FocusMonitor in IMMEDIATE mode attached to #parent. When the user touches\n // #child, #parent is programmatically focused. This code will attribute the focus to touch\n // instead of program. This is a relatively minor edge-case that can be worked around by using\n // focusVia(parent, 'program') to focus #parent.\n return this._detectionMode === 1 /* FocusMonitorDetectionMode.EVENTUAL */ || !!focusEventTarget?.contains(this._inputModalityDetector._mostRecentTarget);\n }\n /**\n * Sets the focus classes on the element based on the given focus origin.\n * @param element The element to update the classes on.\n * @param origin The focus origin.\n */\n _setClasses(element, origin) {\n element.classList.toggle('cdk-focused', !!origin);\n element.classList.toggle('cdk-touch-focused', origin === 'touch');\n element.classList.toggle('cdk-keyboard-focused', origin === 'keyboard');\n element.classList.toggle('cdk-mouse-focused', origin === 'mouse');\n element.classList.toggle('cdk-program-focused', origin === 'program');\n }\n /**\n * Updates the focus origin. If we're using immediate detection mode, we schedule an async\n * function to clear the origin at the end of a timeout. The duration of the timeout depends on\n * the origin being set.\n * @param origin The origin to set.\n * @param isFromInteraction Whether we are setting the origin from an interaction event.\n */\n _setOrigin(origin, isFromInteraction = false) {\n this._ngZone.runOutsideAngular(() => {\n this._origin = origin;\n this._originFromTouchInteraction = origin === 'touch' && isFromInteraction;\n // If we're in IMMEDIATE mode, reset the origin at the next tick (or in `TOUCH_BUFFER_MS` ms\n // for a touch event). We reset the origin at the next tick because Firefox focuses one tick\n // after the interaction event. We wait `TOUCH_BUFFER_MS` ms before resetting the origin for\n // a touch event because when a touch event is fired, the associated focus event isn't yet in\n // the event queue. Before doing so, clear any pending timeouts.\n if (this._detectionMode === 0 /* FocusMonitorDetectionMode.IMMEDIATE */) {\n clearTimeout(this._originTimeoutId);\n const ms = this._originFromTouchInteraction ? TOUCH_BUFFER_MS : 1;\n this._originTimeoutId = setTimeout(() => this._origin = null, ms);\n }\n });\n }\n /**\n * Handles focus events on a registered element.\n * @param event The focus event.\n * @param element The monitored element.\n */\n _onFocus(event, element) {\n // NOTE(mmalerba): We currently set the classes based on the focus origin of the most recent\n // focus event affecting the monitored element. If we want to use the origin of the first event\n // instead we should check for the cdk-focused class here and return if the element already has\n // it. (This only matters for elements that have includesChildren = true).\n // If we are not counting child-element-focus as focused, make sure that the event target is the\n // monitored element itself.\n const elementInfo = this._elementInfo.get(element);\n const focusEventTarget = _getEventTarget(event);\n if (!elementInfo || !elementInfo.checkChildren && element !== focusEventTarget) {\n return;\n }\n this._originChanged(element, this._getFocusOrigin(focusEventTarget), elementInfo);\n }\n /**\n * Handles blur events on a registered element.\n * @param event The blur event.\n * @param element The monitored element.\n */\n _onBlur(event, element) {\n // If we are counting child-element-focus as focused, make sure that we aren't just blurring in\n // order to focus another child of the monitored element.\n const elementInfo = this._elementInfo.get(element);\n if (!elementInfo || elementInfo.checkChildren && event.relatedTarget instanceof Node && element.contains(event.relatedTarget)) {\n return;\n }\n this._setClasses(element);\n this._emitOrigin(elementInfo, null);\n }\n _emitOrigin(info, origin) {\n if (info.subject.observers.length) {\n this._ngZone.run(() => info.subject.next(origin));\n }\n }\n _registerGlobalListeners(elementInfo) {\n if (!this._platform.isBrowser) {\n return;\n }\n const rootNode = elementInfo.rootNode;\n const rootNodeFocusListeners = this._rootNodeFocusListenerCount.get(rootNode) || 0;\n if (!rootNodeFocusListeners) {\n this._ngZone.runOutsideAngular(() => {\n rootNode.addEventListener('focus', this._rootNodeFocusAndBlurListener, captureEventListenerOptions);\n rootNode.addEventListener('blur', this._rootNodeFocusAndBlurListener, captureEventListenerOptions);\n });\n }\n this._rootNodeFocusListenerCount.set(rootNode, rootNodeFocusListeners + 1);\n // Register global listeners when first element is monitored.\n if (++this._monitoredElementCount === 1) {\n // Note: we listen to events in the capture phase so we\n // can detect them even if the user stops propagation.\n this._ngZone.runOutsideAngular(() => {\n const window = this._getWindow();\n window.addEventListener('focus', this._windowFocusListener);\n });\n // The InputModalityDetector is also just a collection of global listeners.\n this._inputModalityDetector.modalityDetected.pipe(takeUntil(this._stopInputModalityDetector)).subscribe(modality => {\n this._setOrigin(modality, true /* isFromInteraction */);\n });\n }\n }\n _removeGlobalListeners(elementInfo) {\n const rootNode = elementInfo.rootNode;\n if (this._rootNodeFocusListenerCount.has(rootNode)) {\n const rootNodeFocusListeners = this._rootNodeFocusListenerCount.get(rootNode);\n if (rootNodeFocusListeners > 1) {\n this._rootNodeFocusListenerCount.set(rootNode, rootNodeFocusListeners - 1);\n } else {\n rootNode.removeEventListener('focus', this._rootNodeFocusAndBlurListener, captureEventListenerOptions);\n rootNode.removeEventListener('blur', this._rootNodeFocusAndBlurListener, captureEventListenerOptions);\n this._rootNodeFocusListenerCount.delete(rootNode);\n }\n }\n // Unregister global listeners when last element is unmonitored.\n if (! --this._monitoredElementCount) {\n const window = this._getWindow();\n window.removeEventListener('focus', this._windowFocusListener);\n // Equivalently, stop our InputModalityDetector subscription.\n this._stopInputModalityDetector.next();\n // Clear timeouts for all potentially pending timeouts to prevent the leaks.\n clearTimeout(this._windowFocusTimeoutId);\n clearTimeout(this._originTimeoutId);\n }\n }\n /** Updates all the state on an element once its focus origin has changed. */\n _originChanged(element, origin, elementInfo) {\n this._setClasses(element, origin);\n this._emitOrigin(elementInfo, origin);\n this._lastFocusOrigin = origin;\n }\n /**\n * Collects the `MonitoredElementInfo` of a particular element and\n * all of its ancestors that have enabled `checkChildren`.\n * @param element Element from which to start the search.\n */\n _getClosestElementsInfo(element) {\n const results = [];\n this._elementInfo.forEach((info, currentElement) => {\n if (currentElement === element || info.checkChildren && currentElement.contains(element)) {\n results.push([currentElement, info]);\n }\n });\n return results;\n }\n /**\n * Returns whether an interaction is likely to have come from the user clicking the `label` of\n * an `input` or `textarea` in order to focus it.\n * @param focusEventTarget Target currently receiving focus.\n */\n _isLastInteractionFromInputLabel(focusEventTarget) {\n const {\n _mostRecentTarget: mostRecentTarget,\n mostRecentModality\n } = this._inputModalityDetector;\n // If the last interaction used the mouse on an element contained by one of the labels\n // of an `input`/`textarea` that is currently focused, it is very likely that the\n // user redirected focus using the label.\n if (mostRecentModality !== 'mouse' || !mostRecentTarget || mostRecentTarget === focusEventTarget || focusEventTarget.nodeName !== 'INPUT' && focusEventTarget.nodeName !== 'TEXTAREA' || focusEventTarget.disabled) {\n return false;\n }\n const labels = focusEventTarget.labels;\n if (labels) {\n for (let i = 0; i < labels.length; i++) {\n if (labels[i].contains(mostRecentTarget)) {\n return true;\n }\n }\n }\n return false;\n }\n static {\n this.ɵfac = function FocusMonitor_Factory(ɵt) {\n return new (ɵt || FocusMonitor)(i0.ɵɵinject(i0.NgZone), i0.ɵɵinject(i1.Platform), i0.ɵɵinject(InputModalityDetector), i0.ɵɵinject(DOCUMENT, 8), i0.ɵɵinject(FOCUS_MONITOR_DEFAULT_OPTIONS, 8));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: FocusMonitor,\n factory: FocusMonitor.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(FocusMonitor, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: i0.NgZone\n }, {\n type: i1.Platform\n }, {\n type: InputModalityDetector\n }, {\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [FOCUS_MONITOR_DEFAULT_OPTIONS]\n }]\n }];\n }, null);\n})();\n/**\n * Directive that determines how a particular element was focused (via keyboard, mouse, touch, or\n * programmatically) and adds corresponding classes to the element.\n *\n * There are two variants of this directive:\n * 1) cdkMonitorElementFocus: does not consider an element to be focused if one of its children is\n * focused.\n * 2) cdkMonitorSubtreeFocus: considers an element focused if it or any of its children are focused.\n */\nclass CdkMonitorFocus {\n constructor(_elementRef, _focusMonitor) {\n this._elementRef = _elementRef;\n this._focusMonitor = _focusMonitor;\n this._focusOrigin = null;\n this.cdkFocusChange = new EventEmitter();\n }\n get focusOrigin() {\n return this._focusOrigin;\n }\n ngAfterViewInit() {\n const element = this._elementRef.nativeElement;\n this._monitorSubscription = this._focusMonitor.monitor(element, element.nodeType === 1 && element.hasAttribute('cdkMonitorSubtreeFocus')).subscribe(origin => {\n this._focusOrigin = origin;\n this.cdkFocusChange.emit(origin);\n });\n }\n ngOnDestroy() {\n this._focusMonitor.stopMonitoring(this._elementRef);\n if (this._monitorSubscription) {\n this._monitorSubscription.unsubscribe();\n }\n }\n static {\n this.ɵfac = function CdkMonitorFocus_Factory(ɵt) {\n return new (ɵt || CdkMonitorFocus)(i0.ɵɵdirectiveInject(i0.ElementRef), i0.ɵɵdirectiveInject(FocusMonitor));\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkMonitorFocus,\n selectors: [[\"\", \"cdkMonitorElementFocus\", \"\"], [\"\", \"cdkMonitorSubtreeFocus\", \"\"]],\n outputs: {\n cdkFocusChange: \"cdkFocusChange\"\n },\n exportAs: [\"cdkMonitorFocus\"]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkMonitorFocus, [{\n type: Directive,\n args: [{\n selector: '[cdkMonitorElementFocus], [cdkMonitorSubtreeFocus]',\n exportAs: 'cdkMonitorFocus'\n }]\n }], function () {\n return [{\n type: i0.ElementRef\n }, {\n type: FocusMonitor\n }];\n }, {\n cdkFocusChange: [{\n type: Output\n }]\n });\n})();\n\n/** CSS class applied to the document body when in black-on-white high-contrast mode. */\nconst BLACK_ON_WHITE_CSS_CLASS = 'cdk-high-contrast-black-on-white';\n/** CSS class applied to the document body when in white-on-black high-contrast mode. */\nconst WHITE_ON_BLACK_CSS_CLASS = 'cdk-high-contrast-white-on-black';\n/** CSS class applied to the document body when in high-contrast mode. */\nconst HIGH_CONTRAST_MODE_ACTIVE_CSS_CLASS = 'cdk-high-contrast-active';\n/**\n * Service to determine whether the browser is currently in a high-contrast-mode environment.\n *\n * Microsoft Windows supports an accessibility feature called \"High Contrast Mode\". This mode\n * changes the appearance of all applications, including web applications, to dramatically increase\n * contrast.\n *\n * IE, Edge, and Firefox currently support this mode. Chrome does not support Windows High Contrast\n * Mode. This service does not detect high-contrast mode as added by the Chrome \"High Contrast\"\n * browser extension.\n */\nclass HighContrastModeDetector {\n constructor(_platform, document) {\n this._platform = _platform;\n this._document = document;\n this._breakpointSubscription = inject(BreakpointObserver).observe('(forced-colors: active)').subscribe(() => {\n if (this._hasCheckedHighContrastMode) {\n this._hasCheckedHighContrastMode = false;\n this._applyBodyHighContrastModeCssClasses();\n }\n });\n }\n /** Gets the current high-contrast-mode for the page. */\n getHighContrastMode() {\n if (!this._platform.isBrowser) {\n return 0 /* HighContrastMode.NONE */;\n }\n // Create a test element with an arbitrary background-color that is neither black nor\n // white; high-contrast mode will coerce the color to either black or white. Also ensure that\n // appending the test element to the DOM does not affect layout by absolutely positioning it\n const testElement = this._document.createElement('div');\n testElement.style.backgroundColor = 'rgb(1,2,3)';\n testElement.style.position = 'absolute';\n this._document.body.appendChild(testElement);\n // Get the computed style for the background color, collapsing spaces to normalize between\n // browsers. Once we get this color, we no longer need the test element. Access the `window`\n // via the document so we can fake it in tests. Note that we have extra null checks, because\n // this logic will likely run during app bootstrap and throwing can break the entire app.\n const documentWindow = this._document.defaultView || window;\n const computedStyle = documentWindow && documentWindow.getComputedStyle ? documentWindow.getComputedStyle(testElement) : null;\n const computedColor = (computedStyle && computedStyle.backgroundColor || '').replace(/ /g, '');\n testElement.remove();\n switch (computedColor) {\n // Pre Windows 11 dark theme.\n case 'rgb(0,0,0)':\n // Windows 11 dark themes.\n case 'rgb(45,50,54)':\n case 'rgb(32,32,32)':\n return 2 /* HighContrastMode.WHITE_ON_BLACK */;\n // Pre Windows 11 light theme.\n case 'rgb(255,255,255)':\n // Windows 11 light theme.\n case 'rgb(255,250,239)':\n return 1 /* HighContrastMode.BLACK_ON_WHITE */;\n }\n return 0 /* HighContrastMode.NONE */;\n }\n ngOnDestroy() {\n this._breakpointSubscription.unsubscribe();\n }\n /** Applies CSS classes indicating high-contrast mode to document body (browser-only). */\n _applyBodyHighContrastModeCssClasses() {\n if (!this._hasCheckedHighContrastMode && this._platform.isBrowser && this._document.body) {\n const bodyClasses = this._document.body.classList;\n bodyClasses.remove(HIGH_CONTRAST_MODE_ACTIVE_CSS_CLASS, BLACK_ON_WHITE_CSS_CLASS, WHITE_ON_BLACK_CSS_CLASS);\n this._hasCheckedHighContrastMode = true;\n const mode = this.getHighContrastMode();\n if (mode === 1 /* HighContrastMode.BLACK_ON_WHITE */) {\n bodyClasses.add(HIGH_CONTRAST_MODE_ACTIVE_CSS_CLASS, BLACK_ON_WHITE_CSS_CLASS);\n } else if (mode === 2 /* HighContrastMode.WHITE_ON_BLACK */) {\n bodyClasses.add(HIGH_CONTRAST_MODE_ACTIVE_CSS_CLASS, WHITE_ON_BLACK_CSS_CLASS);\n }\n }\n }\n static {\n this.ɵfac = function HighContrastModeDetector_Factory(ɵt) {\n return new (ɵt || HighContrastModeDetector)(i0.ɵɵinject(i1.Platform), i0.ɵɵinject(DOCUMENT));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: HighContrastModeDetector,\n factory: HighContrastModeDetector.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(HighContrastModeDetector, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], function () {\n return [{\n type: i1.Platform\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }];\n }, null);\n})();\nclass A11yModule {\n constructor(highContrastModeDetector) {\n highContrastModeDetector._applyBodyHighContrastModeCssClasses();\n }\n static {\n this.ɵfac = function A11yModule_Factory(ɵt) {\n return new (ɵt || A11yModule)(i0.ɵɵinject(HighContrastModeDetector));\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: A11yModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n imports: [ObserversModule]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(A11yModule, [{\n type: NgModule,\n args: [{\n imports: [ObserversModule],\n declarations: [CdkAriaLive, CdkTrapFocus, CdkMonitorFocus],\n exports: [CdkAriaLive, CdkTrapFocus, CdkMonitorFocus]\n }]\n }], function () {\n return [{\n type: HighContrastModeDetector\n }];\n }, null);\n})();\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { A11yModule, ActiveDescendantKeyManager, AriaDescriber, CDK_DESCRIBEDBY_HOST_ATTRIBUTE, CDK_DESCRIBEDBY_ID_PREFIX, CdkAriaLive, CdkMonitorFocus, CdkTrapFocus, ConfigurableFocusTrap, ConfigurableFocusTrapFactory, EventListenerFocusTrapInertStrategy, FOCUS_MONITOR_DEFAULT_OPTIONS, FOCUS_TRAP_INERT_STRATEGY, FocusKeyManager, FocusMonitor, FocusTrap, FocusTrapFactory, HighContrastModeDetector, INPUT_MODALITY_DETECTOR_DEFAULT_OPTIONS, INPUT_MODALITY_DETECTOR_OPTIONS, InputModalityDetector, InteractivityChecker, IsFocusableConfig, LIVE_ANNOUNCER_DEFAULT_OPTIONS, LIVE_ANNOUNCER_ELEMENT_TOKEN, LIVE_ANNOUNCER_ELEMENT_TOKEN_FACTORY, ListKeyManager, LiveAnnouncer, MESSAGES_CONTAINER_ID, addAriaReferencedId, getAriaReferenceIds, isFakeMousedownFromScreenReader, isFakeTouchstartFromScreenReader, removeAriaReferencedId };\n","/**\n * @license Angular v18.1.3\n * (c) 2010-2024 Google LLC. https://angular.io/\n * License: MIT\n */\n\nimport { DOCUMENT } from '@angular/common';\nimport * as i0 from '@angular/core';\nimport { inject, Injectable, ANIMATION_MODULE_TYPE, ViewEncapsulation, ɵRuntimeError, Inject } from '@angular/core';\n\n/**\n * @description Constants for the categories of parameters that can be defined for animations.\n *\n * A corresponding function defines a set of parameters for each category, and\n * collects them into a corresponding `AnimationMetadata` object.\n *\n * @publicApi\n */\nvar AnimationMetadataType;\n(function (AnimationMetadataType) {\n /**\n * Associates a named animation state with a set of CSS styles.\n * See [`state()`](api/animations/state)\n */\n AnimationMetadataType[AnimationMetadataType[\"State\"] = 0] = \"State\";\n /**\n * Data for a transition from one animation state to another.\n * See `transition()`\n */\n AnimationMetadataType[AnimationMetadataType[\"Transition\"] = 1] = \"Transition\";\n /**\n * Contains a set of animation steps.\n * See `sequence()`\n */\n AnimationMetadataType[AnimationMetadataType[\"Sequence\"] = 2] = \"Sequence\";\n /**\n * Contains a set of animation steps.\n * See `{@link animations/group group()}`\n */\n AnimationMetadataType[AnimationMetadataType[\"Group\"] = 3] = \"Group\";\n /**\n * Contains an animation step.\n * See `animate()`\n */\n AnimationMetadataType[AnimationMetadataType[\"Animate\"] = 4] = \"Animate\";\n /**\n * Contains a set of animation steps.\n * See `keyframes()`\n */\n AnimationMetadataType[AnimationMetadataType[\"Keyframes\"] = 5] = \"Keyframes\";\n /**\n * Contains a set of CSS property-value pairs into a named style.\n * See `style()`\n */\n AnimationMetadataType[AnimationMetadataType[\"Style\"] = 6] = \"Style\";\n /**\n * Associates an animation with an entry trigger that can be attached to an element.\n * See `trigger()`\n */\n AnimationMetadataType[AnimationMetadataType[\"Trigger\"] = 7] = \"Trigger\";\n /**\n * Contains a re-usable animation.\n * See `animation()`\n */\n AnimationMetadataType[AnimationMetadataType[\"Reference\"] = 8] = \"Reference\";\n /**\n * Contains data to use in executing child animations returned by a query.\n * See `animateChild()`\n */\n AnimationMetadataType[AnimationMetadataType[\"AnimateChild\"] = 9] = \"AnimateChild\";\n /**\n * Contains animation parameters for a re-usable animation.\n * See `useAnimation()`\n */\n AnimationMetadataType[AnimationMetadataType[\"AnimateRef\"] = 10] = \"AnimateRef\";\n /**\n * Contains child-animation query data.\n * See `query()`\n */\n AnimationMetadataType[AnimationMetadataType[\"Query\"] = 11] = \"Query\";\n /**\n * Contains data for staggering an animation sequence.\n * See `stagger()`\n */\n AnimationMetadataType[AnimationMetadataType[\"Stagger\"] = 12] = \"Stagger\";\n})(AnimationMetadataType || (AnimationMetadataType = {}));\n/**\n * Specifies automatic styling.\n *\n * @publicApi\n */\nconst AUTO_STYLE = '*';\n/**\n * Creates a named animation trigger, containing a list of [`state()`](api/animations/state)\n * and `transition()` entries to be evaluated when the expression\n * bound to the trigger changes.\n *\n * @param name An identifying string.\n * @param definitions An animation definition object, containing an array of\n * [`state()`](api/animations/state) and `transition()` declarations.\n *\n * @return An object that encapsulates the trigger data.\n *\n * @usageNotes\n * Define an animation trigger in the `animations` section of `@Component` metadata.\n * In the template, reference the trigger by name and bind it to a trigger expression that\n * evaluates to a defined animation state, using the following format:\n *\n * `[@triggerName]=\"expression\"`\n *\n * Animation trigger bindings convert all values to strings, and then match the\n * previous and current values against any linked transitions.\n * Booleans can be specified as `1` or `true` and `0` or `false`.\n *\n * ### Usage Example\n *\n * The following example creates an animation trigger reference based on the provided\n * name value.\n * The provided animation value is expected to be an array consisting of state and\n * transition declarations.\n *\n * ```typescript\n * @Component({\n * selector: \"my-component\",\n * templateUrl: \"my-component-tpl.html\",\n * animations: [\n * trigger(\"myAnimationTrigger\", [\n * state(...),\n * state(...),\n * transition(...),\n * transition(...)\n * ])\n * ]\n * })\n * class MyComponent {\n * myStatusExp = \"something\";\n * }\n * ```\n *\n * The template associated with this component makes use of the defined trigger\n * by binding to an element within its template code.\n *\n * ```html\n * \n *
...
\n * ```\n *\n * ### Using an inline function\n * The `transition` animation method also supports reading an inline function which can decide\n * if its associated animation should be run.\n *\n * ```typescript\n * // this method is run each time the `myAnimationTrigger` trigger value changes.\n * function myInlineMatcherFn(fromState: string, toState: string, element: any, params: {[key:\n string]: any}): boolean {\n * // notice that `element` and `params` are also available here\n * return toState == 'yes-please-animate';\n * }\n *\n * @Component({\n * selector: 'my-component',\n * templateUrl: 'my-component-tpl.html',\n * animations: [\n * trigger('myAnimationTrigger', [\n * transition(myInlineMatcherFn, [\n * // the animation sequence code\n * ]),\n * ])\n * ]\n * })\n * class MyComponent {\n * myStatusExp = \"yes-please-animate\";\n * }\n * ```\n *\n * ### Disabling Animations\n * When true, the special animation control binding `@.disabled` binding prevents\n * all animations from rendering.\n * Place the `@.disabled` binding on an element to disable\n * animations on the element itself, as well as any inner animation triggers\n * within the element.\n *\n * The following example shows how to use this feature:\n *\n * ```typescript\n * @Component({\n * selector: 'my-component',\n * template: `\n *
\n *
\n *
\n * `,\n * animations: [\n * trigger(\"childAnimation\", [\n * // ...\n * ])\n * ]\n * })\n * class MyComponent {\n * isDisabled = true;\n * exp = '...';\n * }\n * ```\n *\n * When `@.disabled` is true, it prevents the `@childAnimation` trigger from animating,\n * along with any inner animations.\n *\n * ### Disable animations application-wide\n * When an area of the template is set to have animations disabled,\n * **all** inner components have their animations disabled as well.\n * This means that you can disable all animations for an app\n * by placing a host binding set on `@.disabled` on the topmost Angular component.\n *\n * ```typescript\n * import {Component, HostBinding} from '@angular/core';\n *\n * @Component({\n * selector: 'app-component',\n * templateUrl: 'app.component.html',\n * })\n * class AppComponent {\n * @HostBinding('@.disabled')\n * public animationsDisabled = true;\n * }\n * ```\n *\n * ### Overriding disablement of inner animations\n * Despite inner animations being disabled, a parent animation can `query()`\n * for inner elements located in disabled areas of the template and still animate\n * them if needed. This is also the case for when a sub animation is\n * queried by a parent and then later animated using `animateChild()`.\n *\n * ### Detecting when an animation is disabled\n * If a region of the DOM (or the entire application) has its animations disabled, the animation\n * trigger callbacks still fire, but for zero seconds. When the callback fires, it provides\n * an instance of an `AnimationEvent`. If animations are disabled,\n * the `.disabled` flag on the event is true.\n *\n * @publicApi\n */\nfunction trigger(name, definitions) {\n return {\n type: AnimationMetadataType.Trigger,\n name,\n definitions,\n options: {}\n };\n}\n/**\n * Defines an animation step that combines styling information with timing information.\n *\n * @param timings Sets `AnimateTimings` for the parent animation.\n * A string in the format \"duration [delay] [easing]\".\n * - Duration and delay are expressed as a number and optional time unit,\n * such as \"1s\" or \"10ms\" for one second and 10 milliseconds, respectively.\n * The default unit is milliseconds.\n * - The easing value controls how the animation accelerates and decelerates\n * during its runtime. Value is one of `ease`, `ease-in`, `ease-out`,\n * `ease-in-out`, or a `cubic-bezier()` function call.\n * If not supplied, no easing is applied.\n *\n * For example, the string \"1s 100ms ease-out\" specifies a duration of\n * 1000 milliseconds, and delay of 100 ms, and the \"ease-out\" easing style,\n * which decelerates near the end of the duration.\n * @param styles Sets AnimationStyles for the parent animation.\n * A function call to either `style()` or `keyframes()`\n * that returns a collection of CSS style entries to be applied to the parent animation.\n * When null, uses the styles from the destination state.\n * This is useful when describing an animation step that will complete an animation;\n * see \"Animating to the final state\" in `transitions()`.\n * @returns An object that encapsulates the animation step.\n *\n * @usageNotes\n * Call within an animation `sequence()`, `{@link animations/group group()}`, or\n * `transition()` call to specify an animation step\n * that applies given style data to the parent animation for a given amount of time.\n *\n * ### Syntax Examples\n * **Timing examples**\n *\n * The following examples show various `timings` specifications.\n * - `animate(500)` : Duration is 500 milliseconds.\n * - `animate(\"1s\")` : Duration is 1000 milliseconds.\n * - `animate(\"100ms 0.5s\")` : Duration is 100 milliseconds, delay is 500 milliseconds.\n * - `animate(\"5s ease-in\")` : Duration is 5000 milliseconds, easing in.\n * - `animate(\"5s 10ms cubic-bezier(.17,.67,.88,.1)\")` : Duration is 5000 milliseconds, delay is 10\n * milliseconds, easing according to a bezier curve.\n *\n * **Style examples**\n *\n * The following example calls `style()` to set a single CSS style.\n * ```typescript\n * animate(500, style({ background: \"red\" }))\n * ```\n * The following example calls `keyframes()` to set a CSS style\n * to different values for successive keyframes.\n * ```typescript\n * animate(500, keyframes(\n * [\n * style({ background: \"blue\" }),\n * style({ background: \"red\" })\n * ])\n * ```\n *\n * @publicApi\n */\nfunction animate(timings, styles = null) {\n return {\n type: AnimationMetadataType.Animate,\n styles,\n timings\n };\n}\n/**\n * @description Defines a list of animation steps to be run in parallel.\n *\n * @param steps An array of animation step objects.\n * - When steps are defined by `style()` or `animate()`\n * function calls, each call within the group is executed instantly.\n * - To specify offset styles to be applied at a later time, define steps with\n * `keyframes()`, or use `animate()` calls with a delay value.\n * For example:\n *\n * ```typescript\n * group([\n * animate(\"1s\", style({ background: \"black\" })),\n * animate(\"2s\", style({ color: \"white\" }))\n * ])\n * ```\n *\n * @param options An options object containing a delay and\n * developer-defined parameters that provide styling defaults and\n * can be overridden on invocation.\n *\n * @return An object that encapsulates the group data.\n *\n * @usageNotes\n * Grouped animations are useful when a series of styles must be\n * animated at different starting times and closed off at different ending times.\n *\n * When called within a `sequence()` or a\n * `transition()` call, does not continue to the next\n * instruction until all of the inner animation steps have completed.\n *\n * @publicApi\n */\nfunction group(steps, options = null) {\n return {\n type: AnimationMetadataType.Group,\n steps,\n options\n };\n}\n/**\n * Defines a list of animation steps to be run sequentially, one by one.\n *\n * @param steps An array of animation step objects.\n * - Steps defined by `style()` calls apply the styling data immediately.\n * - Steps defined by `animate()` calls apply the styling data over time\n * as specified by the timing data.\n *\n * ```typescript\n * sequence([\n * style({ opacity: 0 }),\n * animate(\"1s\", style({ opacity: 1 }))\n * ])\n * ```\n *\n * @param options An options object containing a delay and\n * developer-defined parameters that provide styling defaults and\n * can be overridden on invocation.\n *\n * @return An object that encapsulates the sequence data.\n *\n * @usageNotes\n * When you pass an array of steps to a\n * `transition()` call, the steps run sequentially by default.\n * Compare this to the `{@link animations/group group()}` call, which runs animation steps in\n *parallel.\n *\n * When a sequence is used within a `{@link animations/group group()}` or a `transition()` call,\n * execution continues to the next instruction only after each of the inner animation\n * steps have completed.\n *\n * @publicApi\n **/\nfunction sequence(steps, options = null) {\n return {\n type: AnimationMetadataType.Sequence,\n steps,\n options\n };\n}\n/**\n * Declares a key/value object containing CSS properties/styles that\n * can then be used for an animation [`state`](api/animations/state), within an animation\n *`sequence`, or as styling data for calls to `animate()` and `keyframes()`.\n *\n * @param tokens A set of CSS styles or HTML styles associated with an animation state.\n * The value can be any of the following:\n * - A key-value style pair associating a CSS property with a value.\n * - An array of key-value style pairs.\n * - An asterisk (*), to use auto-styling, where styles are derived from the element\n * being animated and applied to the animation when it starts.\n *\n * Auto-styling can be used to define a state that depends on layout or other\n * environmental factors.\n *\n * @return An object that encapsulates the style data.\n *\n * @usageNotes\n * The following examples create animation styles that collect a set of\n * CSS property values:\n *\n * ```typescript\n * // string values for CSS properties\n * style({ background: \"red\", color: \"blue\" })\n *\n * // numerical pixel values\n * style({ width: 100, height: 0 })\n * ```\n *\n * The following example uses auto-styling to allow an element to animate from\n * a height of 0 up to its full height:\n *\n * ```\n * style({ height: 0 }),\n * animate(\"1s\", style({ height: \"*\" }))\n * ```\n *\n * @publicApi\n **/\nfunction style(tokens) {\n return {\n type: AnimationMetadataType.Style,\n styles: tokens,\n offset: null\n };\n}\n/**\n * Declares an animation state within a trigger attached to an element.\n *\n * @param name One or more names for the defined state in a comma-separated string.\n * The following reserved state names can be supplied to define a style for specific use\n * cases:\n *\n * - `void` You can associate styles with this name to be used when\n * the element is detached from the application. For example, when an `ngIf` evaluates\n * to false, the state of the associated element is void.\n * - `*` (asterisk) Indicates the default state. You can associate styles with this name\n * to be used as the fallback when the state that is being animated is not declared\n * within the trigger.\n *\n * @param styles A set of CSS styles associated with this state, created using the\n * `style()` function.\n * This set of styles persists on the element once the state has been reached.\n * @param options Parameters that can be passed to the state when it is invoked.\n * 0 or more key-value pairs.\n * @return An object that encapsulates the new state data.\n *\n * @usageNotes\n * Use the `trigger()` function to register states to an animation trigger.\n * Use the `transition()` function to animate between states.\n * When a state is active within a component, its associated styles persist on the element,\n * even when the animation ends.\n *\n * @publicApi\n **/\nfunction state(name, styles, options) {\n return {\n type: AnimationMetadataType.State,\n name,\n styles,\n options\n };\n}\n/**\n * Defines a set of animation styles, associating each style with an optional `offset` value.\n *\n * @param steps A set of animation styles with optional offset data.\n * The optional `offset` value for a style specifies a percentage of the total animation\n * time at which that style is applied.\n * @returns An object that encapsulates the keyframes data.\n *\n * @usageNotes\n * Use with the `animate()` call. Instead of applying animations\n * from the current state\n * to the destination state, keyframes describe how each style entry is applied and at what point\n * within the animation arc.\n * Compare [CSS Keyframe Animations](https://www.w3schools.com/css/css3_animations.asp).\n *\n * ### Usage\n *\n * In the following example, the offset values describe\n * when each `backgroundColor` value is applied. The color is red at the start, and changes to\n * blue when 20% of the total time has elapsed.\n *\n * ```typescript\n * // the provided offset values\n * animate(\"5s\", keyframes([\n * style({ backgroundColor: \"red\", offset: 0 }),\n * style({ backgroundColor: \"blue\", offset: 0.2 }),\n * style({ backgroundColor: \"orange\", offset: 0.3 }),\n * style({ backgroundColor: \"black\", offset: 1 })\n * ]))\n * ```\n *\n * If there are no `offset` values specified in the style entries, the offsets\n * are calculated automatically.\n *\n * ```typescript\n * animate(\"5s\", keyframes([\n * style({ backgroundColor: \"red\" }) // offset = 0\n * style({ backgroundColor: \"blue\" }) // offset = 0.33\n * style({ backgroundColor: \"orange\" }) // offset = 0.66\n * style({ backgroundColor: \"black\" }) // offset = 1\n * ]))\n *```\n\n * @publicApi\n */\nfunction keyframes(steps) {\n return {\n type: AnimationMetadataType.Keyframes,\n steps\n };\n}\n/**\n * Declares an animation transition which is played when a certain specified condition is met.\n *\n * @param stateChangeExpr A string with a specific format or a function that specifies when the\n * animation transition should occur (see [State Change Expression](#state-change-expression)).\n *\n * @param steps One or more animation objects that represent the animation's instructions.\n *\n * @param options An options object that can be used to specify a delay for the animation or provide\n * custom parameters for it.\n *\n * @returns An object that encapsulates the transition data.\n *\n * @usageNotes\n *\n * ### State Change Expression\n *\n * The State Change Expression instructs Angular when to run the transition's animations, it can\n *either be\n * - a string with a specific syntax\n * - or a function that compares the previous and current state (value of the expression bound to\n * the element's trigger) and returns `true` if the transition should occur or `false` otherwise\n *\n * The string format can be:\n * - `fromState => toState`, which indicates that the transition's animations should occur then the\n * expression bound to the trigger's element goes from `fromState` to `toState`\n *\n * _Example:_\n * ```typescript\n * transition('open => closed', animate('.5s ease-out', style({ height: 0 }) ))\n * ```\n *\n * - `fromState <=> toState`, which indicates that the transition's animations should occur then\n * the expression bound to the trigger's element goes from `fromState` to `toState` or vice versa\n *\n * _Example:_\n * ```typescript\n * transition('enabled <=> disabled', animate('1s cubic-bezier(0.8,0.3,0,1)'))\n * ```\n *\n * - `:enter`/`:leave`, which indicates that the transition's animations should occur when the\n * element enters or exists the DOM\n *\n * _Example:_\n * ```typescript\n * transition(':enter', [\n * style({ opacity: 0 }),\n * animate('500ms', style({ opacity: 1 }))\n * ])\n * ```\n *\n * - `:increment`/`:decrement`, which indicates that the transition's animations should occur when\n * the numerical expression bound to the trigger's element has increased in value or decreased\n *\n * _Example:_\n * ```typescript\n * transition(':increment', query('@counter', animateChild()))\n * ```\n *\n * - a sequence of any of the above divided by commas, which indicates that transition's animations\n * should occur whenever one of the state change expressions matches\n *\n * _Example:_\n * ```typescript\n * transition(':increment, * => enabled, :enter', animate('1s ease', keyframes([\n * style({ transform: 'scale(1)', offset: 0}),\n * style({ transform: 'scale(1.1)', offset: 0.7}),\n * style({ transform: 'scale(1)', offset: 1})\n * ]))),\n * ```\n *\n * Also note that in such context:\n * - `void` can be used to indicate the absence of the element\n * - asterisks can be used as wildcards that match any state\n * - (as a consequence of the above, `void => *` is equivalent to `:enter` and `* => void` is\n * equivalent to `:leave`)\n * - `true` and `false` also match expression values of `1` and `0` respectively (but do not match\n * _truthy_ and _falsy_ values)\n *\n *
\n *\n * Be careful about entering end leaving elements as their transitions present a common\n * pitfall for developers.\n *\n * Note that when an element with a trigger enters the DOM its `:enter` transition always\n * gets executed, but its `:leave` transition will not be executed if the element is removed\n * alongside its parent (as it will be removed \"without warning\" before its transition has\n * a chance to be executed, the only way that such transition can occur is if the element\n * is exiting the DOM on its own).\n *\n *\n *
\n *\n * ### Animating to a Final State\n *\n * If the final step in a transition is a call to `animate()` that uses a timing value\n * with no `style` data, that step is automatically considered the final animation arc,\n * for the element to reach the final state, in such case Angular automatically adds or removes\n * CSS styles to ensure that the element is in the correct final state.\n *\n *\n * ### Usage Examples\n *\n * - Transition animations applied based on\n * the trigger's expression value\n *\n * ```html\n *
\n * ...\n *
\n * ```\n *\n * ```typescript\n * trigger(\"myAnimationTrigger\", [\n * ..., // states\n * transition(\"on => off, open => closed\", animate(500)),\n * transition(\"* <=> error\", query('.indicator', animateChild()))\n * ])\n * ```\n *\n * - Transition animations applied based on custom logic dependent\n * on the trigger's expression value and provided parameters\n *\n * ```html\n *
\n * ...\n *
\n * ```\n *\n * ```typescript\n * trigger(\"myAnimationTrigger\", [\n * ..., // states\n * transition(\n * (fromState, toState, _element, params) =>\n * ['firststep', 'laststep'].includes(fromState.toLowerCase())\n * && toState === params?.['target'],\n * animate('1s')\n * )\n * ])\n * ```\n *\n * @publicApi\n **/\nfunction transition(stateChangeExpr, steps, options = null) {\n return {\n type: AnimationMetadataType.Transition,\n expr: stateChangeExpr,\n animation: steps,\n options\n };\n}\n/**\n * Produces a reusable animation that can be invoked in another animation or sequence,\n * by calling the `useAnimation()` function.\n *\n * @param steps One or more animation objects, as returned by the `animate()`\n * or `sequence()` function, that form a transformation from one state to another.\n * A sequence is used by default when you pass an array.\n * @param options An options object that can contain a delay value for the start of the\n * animation, and additional developer-defined parameters.\n * Provided values for additional parameters are used as defaults,\n * and override values can be passed to the caller on invocation.\n * @returns An object that encapsulates the animation data.\n *\n * @usageNotes\n * The following example defines a reusable animation, providing some default parameter\n * values.\n *\n * ```typescript\n * var fadeAnimation = animation([\n * style({ opacity: '{{ start }}' }),\n * animate('{{ time }}',\n * style({ opacity: '{{ end }}'}))\n * ],\n * { params: { time: '1000ms', start: 0, end: 1 }});\n * ```\n *\n * The following invokes the defined animation with a call to `useAnimation()`,\n * passing in override parameter values.\n *\n * ```js\n * useAnimation(fadeAnimation, {\n * params: {\n * time: '2s',\n * start: 1,\n * end: 0\n * }\n * })\n * ```\n *\n * If any of the passed-in parameter values are missing from this call,\n * the default values are used. If one or more parameter values are missing before a step is\n * animated, `useAnimation()` throws an error.\n *\n * @publicApi\n */\nfunction animation(steps, options = null) {\n return {\n type: AnimationMetadataType.Reference,\n animation: steps,\n options\n };\n}\n/**\n * Executes a queried inner animation element within an animation sequence.\n *\n * @param options An options object that can contain a delay value for the start of the\n * animation, and additional override values for developer-defined parameters.\n * @return An object that encapsulates the child animation data.\n *\n * @usageNotes\n * Each time an animation is triggered in Angular, the parent animation\n * has priority and any child animations are blocked. In order\n * for a child animation to run, the parent animation must query each of the elements\n * containing child animations, and run them using this function.\n *\n * Note that this feature is designed to be used with `query()` and it will only work\n * with animations that are assigned using the Angular animation library. CSS keyframes\n * and transitions are not handled by this API.\n *\n * @publicApi\n */\nfunction animateChild(options = null) {\n return {\n type: AnimationMetadataType.AnimateChild,\n options\n };\n}\n/**\n * Starts a reusable animation that is created using the `animation()` function.\n *\n * @param animation The reusable animation to start.\n * @param options An options object that can contain a delay value for the start of\n * the animation, and additional override values for developer-defined parameters.\n * @return An object that contains the animation parameters.\n *\n * @publicApi\n */\nfunction useAnimation(animation, options = null) {\n return {\n type: AnimationMetadataType.AnimateRef,\n animation,\n options\n };\n}\n/**\n * Finds one or more inner elements within the current element that is\n * being animated within a sequence. Use with `animate()`.\n *\n * @param selector The element to query, or a set of elements that contain Angular-specific\n * characteristics, specified with one or more of the following tokens.\n * - `query(\":enter\")` or `query(\":leave\")` : Query for newly inserted/removed elements (not\n * all elements can be queried via these tokens, see\n * [Entering and Leaving Elements](#entering-and-leaving-elements))\n * - `query(\":animating\")` : Query all currently animating elements.\n * - `query(\"@triggerName\")` : Query elements that contain an animation trigger.\n * - `query(\"@*\")` : Query all elements that contain an animation triggers.\n * - `query(\":self\")` : Include the current element into the animation sequence.\n *\n * @param animation One or more animation steps to apply to the queried element or elements.\n * An array is treated as an animation sequence.\n * @param options An options object. Use the 'limit' field to limit the total number of\n * items to collect.\n * @return An object that encapsulates the query data.\n *\n * @usageNotes\n *\n * ### Multiple Tokens\n *\n * Tokens can be merged into a combined query selector string. For example:\n *\n * ```typescript\n * query(':self, .record:enter, .record:leave, @subTrigger', [...])\n * ```\n *\n * The `query()` function collects multiple elements and works internally by using\n * `element.querySelectorAll`. Use the `limit` field of an options object to limit\n * the total number of items to be collected. For example:\n *\n * ```js\n * query('div', [\n * animate(...),\n * animate(...)\n * ], { limit: 1 })\n * ```\n *\n * By default, throws an error when zero items are found. Set the\n * `optional` flag to ignore this error. For example:\n *\n * ```js\n * query('.some-element-that-may-not-be-there', [\n * animate(...),\n * animate(...)\n * ], { optional: true })\n * ```\n *\n * ### Entering and Leaving Elements\n *\n * Not all elements can be queried via the `:enter` and `:leave` tokens, the only ones\n * that can are those that Angular assumes can enter/leave based on their own logic\n * (if their insertion/removal is simply a consequence of that of their parent they\n * should be queried via a different token in their parent's `:enter`/`:leave` transitions).\n *\n * The only elements Angular assumes can enter/leave based on their own logic (thus the only\n * ones that can be queried via the `:enter` and `:leave` tokens) are:\n * - Those inserted dynamically (via `ViewContainerRef`)\n * - Those that have a structural directive (which, under the hood, are a subset of the above ones)\n *\n *
\n *\n * Note that elements will be successfully queried via `:enter`/`:leave` even if their\n * insertion/removal is not done manually via `ViewContainerRef`or caused by their structural\n * directive (e.g. they enter/exit alongside their parent).\n *\n *
\n *\n *
\n *\n * There is an exception to what previously mentioned, besides elements entering/leaving based on\n * their own logic, elements with an animation trigger can always be queried via `:leave` when\n * their parent is also leaving.\n *\n *
\n *\n * ### Usage Example\n *\n * The following example queries for inner elements and animates them\n * individually using `animate()`.\n *\n * ```typescript\n * @Component({\n * selector: 'inner',\n * template: `\n *
\n *

Title

\n *
\n * Blah blah blah\n *
\n *
\n * `,\n * animations: [\n * trigger('queryAnimation', [\n * transition('* => goAnimate', [\n * // hide the inner elements\n * query('h1', style({ opacity: 0 })),\n * query('.content', style({ opacity: 0 })),\n *\n * // animate the inner elements in, one by one\n * query('h1', animate(1000, style({ opacity: 1 }))),\n * query('.content', animate(1000, style({ opacity: 1 }))),\n * ])\n * ])\n * ]\n * })\n * class Cmp {\n * exp = '';\n *\n * goAnimate() {\n * this.exp = 'goAnimate';\n * }\n * }\n * ```\n *\n * @publicApi\n */\nfunction query(selector, animation, options = null) {\n return {\n type: AnimationMetadataType.Query,\n selector,\n animation,\n options\n };\n}\n/**\n * Use within an animation `query()` call to issue a timing gap after\n * each queried item is animated.\n *\n * @param timings A delay value.\n * @param animation One ore more animation steps.\n * @returns An object that encapsulates the stagger data.\n *\n * @usageNotes\n * In the following example, a container element wraps a list of items stamped out\n * by an `ngFor`. The container element contains an animation trigger that will later be set\n * to query for each of the inner items.\n *\n * Each time items are added, the opacity fade-in animation runs,\n * and each removed item is faded out.\n * When either of these animations occur, the stagger effect is\n * applied after each item's animation is started.\n *\n * ```html\n * \n * \n *
\n *
\n *
\n * {{ item }}\n *
\n *
\n * ```\n *\n * Here is the component code:\n *\n * ```typescript\n * import {trigger, transition, style, animate, query, stagger} from '@angular/animations';\n * @Component({\n * templateUrl: 'list.component.html',\n * animations: [\n * trigger('listAnimation', [\n * ...\n * ])\n * ]\n * })\n * class ListComponent {\n * items = [];\n *\n * showItems() {\n * this.items = [0,1,2,3,4];\n * }\n *\n * hideItems() {\n * this.items = [];\n * }\n *\n * toggle() {\n * this.items.length ? this.hideItems() : this.showItems();\n * }\n * }\n * ```\n *\n * Here is the animation trigger code:\n *\n * ```typescript\n * trigger('listAnimation', [\n * transition('* => *', [ // each time the binding value changes\n * query(':leave', [\n * stagger(100, [\n * animate('0.5s', style({ opacity: 0 }))\n * ])\n * ]),\n * query(':enter', [\n * style({ opacity: 0 }),\n * stagger(100, [\n * animate('0.5s', style({ opacity: 1 }))\n * ])\n * ])\n * ])\n * ])\n * ```\n *\n * @publicApi\n */\nfunction stagger(timings, animation) {\n return {\n type: AnimationMetadataType.Stagger,\n timings,\n animation\n };\n}\n\n/**\n * An injectable service that produces an animation sequence programmatically within an\n * Angular component or directive.\n * Provided by the `BrowserAnimationsModule` or `NoopAnimationsModule`.\n *\n * @usageNotes\n *\n * To use this service, add it to your component or directive as a dependency.\n * The service is instantiated along with your component.\n *\n * Apps do not typically need to create their own animation players, but if you\n * do need to, follow these steps:\n *\n * 1. Use the [AnimationBuilder.build](api/animations/AnimationBuilder#build)() method\n * to create a programmatic animation. The method returns an `AnimationFactory` instance.\n *\n * 2. Use the factory object to create an `AnimationPlayer` and attach it to a DOM element.\n *\n * 3. Use the player object to control the animation programmatically.\n *\n * For example:\n *\n * ```ts\n * // import the service from BrowserAnimationsModule\n * import {AnimationBuilder} from '@angular/animations';\n * // require the service as a dependency\n * class MyCmp {\n * constructor(private _builder: AnimationBuilder) {}\n *\n * makeAnimation(element: any) {\n * // first define a reusable animation\n * const myAnimation = this._builder.build([\n * style({ width: 0 }),\n * animate(1000, style({ width: '100px' }))\n * ]);\n *\n * // use the returned factory object to create a player\n * const player = myAnimation.create(element);\n *\n * player.play();\n * }\n * }\n * ```\n *\n * @publicApi\n */\nclass AnimationBuilder {\n static {\n this.ɵfac = function AnimationBuilder_Factory(ɵt) {\n return new (ɵt || AnimationBuilder)();\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: AnimationBuilder,\n factory: () => (() => inject(BrowserAnimationBuilder))(),\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(AnimationBuilder, [{\n type: Injectable,\n args: [{\n providedIn: 'root',\n useFactory: () => inject(BrowserAnimationBuilder)\n }]\n }], null, null);\n})();\n/**\n * A factory object returned from the\n * [AnimationBuilder.build](api/animations/AnimationBuilder#build)()\n * method.\n *\n * @publicApi\n */\nclass AnimationFactory {}\nclass BrowserAnimationBuilder extends AnimationBuilder {\n constructor(rootRenderer, doc) {\n super();\n this.animationModuleType = inject(ANIMATION_MODULE_TYPE, {\n optional: true\n });\n this._nextAnimationId = 0;\n const typeData = {\n id: '0',\n encapsulation: ViewEncapsulation.None,\n styles: [],\n data: {\n animation: []\n }\n };\n this._renderer = rootRenderer.createRenderer(doc.body, typeData);\n if (this.animationModuleType === null && !isAnimationRenderer(this._renderer)) {\n // We only support AnimationRenderer & DynamicDelegationRenderer for this AnimationBuilder\n throw new ɵRuntimeError(3600 /* RuntimeErrorCode.BROWSER_ANIMATION_BUILDER_INJECTED_WITHOUT_ANIMATIONS */, (typeof ngDevMode === 'undefined' || ngDevMode) && 'Angular detected that the `AnimationBuilder` was injected, but animation support was not enabled. ' + 'Please make sure that you enable animations in your application by calling `provideAnimations()` or `provideAnimationsAsync()` function.');\n }\n }\n build(animation) {\n const id = this._nextAnimationId;\n this._nextAnimationId++;\n const entry = Array.isArray(animation) ? sequence(animation) : animation;\n issueAnimationCommand(this._renderer, null, id, 'register', [entry]);\n return new BrowserAnimationFactory(id, this._renderer);\n }\n static {\n this.ɵfac = function BrowserAnimationBuilder_Factory(ɵt) {\n return new (ɵt || BrowserAnimationBuilder)(i0.ɵɵinject(i0.RendererFactory2), i0.ɵɵinject(DOCUMENT));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: BrowserAnimationBuilder,\n factory: BrowserAnimationBuilder.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(BrowserAnimationBuilder, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], () => [{\n type: i0.RendererFactory2\n }, {\n type: Document,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }], null);\n})();\nclass BrowserAnimationFactory extends AnimationFactory {\n constructor(_id, _renderer) {\n super();\n this._id = _id;\n this._renderer = _renderer;\n }\n create(element, options) {\n return new RendererAnimationPlayer(this._id, element, options || {}, this._renderer);\n }\n}\nclass RendererAnimationPlayer {\n constructor(id, element, options, _renderer) {\n this.id = id;\n this.element = element;\n this._renderer = _renderer;\n this.parentPlayer = null;\n this._started = false;\n this.totalTime = 0;\n this._command('create', options);\n }\n _listen(eventName, callback) {\n return this._renderer.listen(this.element, `@@${this.id}:${eventName}`, callback);\n }\n _command(command, ...args) {\n issueAnimationCommand(this._renderer, this.element, this.id, command, args);\n }\n onDone(fn) {\n this._listen('done', fn);\n }\n onStart(fn) {\n this._listen('start', fn);\n }\n onDestroy(fn) {\n this._listen('destroy', fn);\n }\n init() {\n this._command('init');\n }\n hasStarted() {\n return this._started;\n }\n play() {\n this._command('play');\n this._started = true;\n }\n pause() {\n this._command('pause');\n }\n restart() {\n this._command('restart');\n }\n finish() {\n this._command('finish');\n }\n destroy() {\n this._command('destroy');\n }\n reset() {\n this._command('reset');\n this._started = false;\n }\n setPosition(p) {\n this._command('setPosition', p);\n }\n getPosition() {\n return unwrapAnimationRenderer(this._renderer)?.engine?.players[this.id]?.getPosition() ?? 0;\n }\n}\nfunction issueAnimationCommand(renderer, element, id, command, args) {\n renderer.setProperty(element, `@@${id}:${command}`, args);\n}\n/**\n * The following 2 methods cannot reference their correct types (AnimationRenderer &\n * DynamicDelegationRenderer) since this would introduce a import cycle.\n */\nfunction unwrapAnimationRenderer(renderer) {\n const type = renderer.ɵtype;\n if (type === 0 /* AnimationRendererType.Regular */) {\n return renderer;\n } else if (type === 1 /* AnimationRendererType.Delegated */) {\n return renderer.animationRenderer;\n }\n return null;\n}\nfunction isAnimationRenderer(renderer) {\n const type = renderer.ɵtype;\n return type === 0 /* AnimationRendererType.Regular */ || type === 1 /* AnimationRendererType.Delegated */;\n}\n\n/**\n * An empty programmatic controller for reusable animations.\n * Used internally when animations are disabled, to avoid\n * checking for the null case when an animation player is expected.\n *\n * @see {@link animate}\n * @see {@link AnimationPlayer}\n *\n * @publicApi\n */\nclass NoopAnimationPlayer {\n constructor(duration = 0, delay = 0) {\n this._onDoneFns = [];\n this._onStartFns = [];\n this._onDestroyFns = [];\n this._originalOnDoneFns = [];\n this._originalOnStartFns = [];\n this._started = false;\n this._destroyed = false;\n this._finished = false;\n this._position = 0;\n this.parentPlayer = null;\n this.totalTime = duration + delay;\n }\n _onFinish() {\n if (!this._finished) {\n this._finished = true;\n this._onDoneFns.forEach(fn => fn());\n this._onDoneFns = [];\n }\n }\n onStart(fn) {\n this._originalOnStartFns.push(fn);\n this._onStartFns.push(fn);\n }\n onDone(fn) {\n this._originalOnDoneFns.push(fn);\n this._onDoneFns.push(fn);\n }\n onDestroy(fn) {\n this._onDestroyFns.push(fn);\n }\n hasStarted() {\n return this._started;\n }\n init() {}\n play() {\n if (!this.hasStarted()) {\n this._onStart();\n this.triggerMicrotask();\n }\n this._started = true;\n }\n /** @internal */\n triggerMicrotask() {\n queueMicrotask(() => this._onFinish());\n }\n _onStart() {\n this._onStartFns.forEach(fn => fn());\n this._onStartFns = [];\n }\n pause() {}\n restart() {}\n finish() {\n this._onFinish();\n }\n destroy() {\n if (!this._destroyed) {\n this._destroyed = true;\n if (!this.hasStarted()) {\n this._onStart();\n }\n this.finish();\n this._onDestroyFns.forEach(fn => fn());\n this._onDestroyFns = [];\n }\n }\n reset() {\n this._started = false;\n this._finished = false;\n this._onStartFns = this._originalOnStartFns;\n this._onDoneFns = this._originalOnDoneFns;\n }\n setPosition(position) {\n this._position = this.totalTime ? position * this.totalTime : 1;\n }\n getPosition() {\n return this.totalTime ? this._position / this.totalTime : 1;\n }\n /** @internal */\n triggerCallback(phaseName) {\n const methods = phaseName == 'start' ? this._onStartFns : this._onDoneFns;\n methods.forEach(fn => fn());\n methods.length = 0;\n }\n}\n\n/**\n * A programmatic controller for a group of reusable animations.\n * Used internally to control animations.\n *\n * @see {@link AnimationPlayer}\n * @see {@link animations/group group}\n *\n */\nclass AnimationGroupPlayer {\n constructor(_players) {\n this._onDoneFns = [];\n this._onStartFns = [];\n this._finished = false;\n this._started = false;\n this._destroyed = false;\n this._onDestroyFns = [];\n this.parentPlayer = null;\n this.totalTime = 0;\n this.players = _players;\n let doneCount = 0;\n let destroyCount = 0;\n let startCount = 0;\n const total = this.players.length;\n if (total == 0) {\n queueMicrotask(() => this._onFinish());\n } else {\n this.players.forEach(player => {\n player.onDone(() => {\n if (++doneCount == total) {\n this._onFinish();\n }\n });\n player.onDestroy(() => {\n if (++destroyCount == total) {\n this._onDestroy();\n }\n });\n player.onStart(() => {\n if (++startCount == total) {\n this._onStart();\n }\n });\n });\n }\n this.totalTime = this.players.reduce((time, player) => Math.max(time, player.totalTime), 0);\n }\n _onFinish() {\n if (!this._finished) {\n this._finished = true;\n this._onDoneFns.forEach(fn => fn());\n this._onDoneFns = [];\n }\n }\n init() {\n this.players.forEach(player => player.init());\n }\n onStart(fn) {\n this._onStartFns.push(fn);\n }\n _onStart() {\n if (!this.hasStarted()) {\n this._started = true;\n this._onStartFns.forEach(fn => fn());\n this._onStartFns = [];\n }\n }\n onDone(fn) {\n this._onDoneFns.push(fn);\n }\n onDestroy(fn) {\n this._onDestroyFns.push(fn);\n }\n hasStarted() {\n return this._started;\n }\n play() {\n if (!this.parentPlayer) {\n this.init();\n }\n this._onStart();\n this.players.forEach(player => player.play());\n }\n pause() {\n this.players.forEach(player => player.pause());\n }\n restart() {\n this.players.forEach(player => player.restart());\n }\n finish() {\n this._onFinish();\n this.players.forEach(player => player.finish());\n }\n destroy() {\n this._onDestroy();\n }\n _onDestroy() {\n if (!this._destroyed) {\n this._destroyed = true;\n this._onFinish();\n this.players.forEach(player => player.destroy());\n this._onDestroyFns.forEach(fn => fn());\n this._onDestroyFns = [];\n }\n }\n reset() {\n this.players.forEach(player => player.reset());\n this._destroyed = false;\n this._finished = false;\n this._started = false;\n }\n setPosition(p) {\n const timeAtPosition = p * this.totalTime;\n this.players.forEach(player => {\n const position = player.totalTime ? Math.min(1, timeAtPosition / player.totalTime) : 1;\n player.setPosition(position);\n });\n }\n getPosition() {\n const longestPlayer = this.players.reduce((longestSoFar, player) => {\n const newPlayerIsLongest = longestSoFar === null || player.totalTime > longestSoFar.totalTime;\n return newPlayerIsLongest ? player : longestSoFar;\n }, null);\n return longestPlayer != null ? longestPlayer.getPosition() : 0;\n }\n beforeDestroy() {\n this.players.forEach(player => {\n if (player.beforeDestroy) {\n player.beforeDestroy();\n }\n });\n }\n /** @internal */\n triggerCallback(phaseName) {\n const methods = phaseName == 'start' ? this._onStartFns : this._onDoneFns;\n methods.forEach(fn => fn());\n methods.length = 0;\n }\n}\nconst ɵPRE_STYLE = '!';\n\n/**\n * @module\n * @description\n * Entry point for all animation APIs of the animation package.\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of this package.\n */\n\n// This file is not used to build this module. It is only used during editing\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { AUTO_STYLE, AnimationBuilder, AnimationFactory, AnimationMetadataType, NoopAnimationPlayer, animate, animateChild, animation, group, keyframes, query, sequence, stagger, state, style, transition, trigger, useAnimation, AnimationGroupPlayer as ɵAnimationGroupPlayer, BrowserAnimationBuilder as ɵBrowserAnimationBuilder, ɵPRE_STYLE };\n","/**\n * @license Angular v18.1.3\n * (c) 2010-2024 Google LLC. https://angular.io/\n * License: MIT\n */\n\nimport { ɵAnimationGroupPlayer, NoopAnimationPlayer, AUTO_STYLE, ɵPRE_STYLE, sequence, AnimationMetadataType, style } from '@angular/animations';\nimport * as i0 from '@angular/core';\nimport { ɵRuntimeError, Injectable } from '@angular/core';\nconst LINE_START = '\\n - ';\nfunction invalidTimingValue(exp) {\n return new ɵRuntimeError(3000 /* RuntimeErrorCode.INVALID_TIMING_VALUE */, ngDevMode && `The provided timing value \"${exp}\" is invalid.`);\n}\nfunction negativeStepValue() {\n return new ɵRuntimeError(3100 /* RuntimeErrorCode.NEGATIVE_STEP_VALUE */, ngDevMode && 'Duration values below 0 are not allowed for this animation step.');\n}\nfunction negativeDelayValue() {\n return new ɵRuntimeError(3101 /* RuntimeErrorCode.NEGATIVE_DELAY_VALUE */, ngDevMode && 'Delay values below 0 are not allowed for this animation step.');\n}\nfunction invalidStyleParams(varName) {\n return new ɵRuntimeError(3001 /* RuntimeErrorCode.INVALID_STYLE_PARAMS */, ngDevMode && `Unable to resolve the local animation param ${varName} in the given list of values`);\n}\nfunction invalidParamValue(varName) {\n return new ɵRuntimeError(3003 /* RuntimeErrorCode.INVALID_PARAM_VALUE */, ngDevMode && `Please provide a value for the animation param ${varName}`);\n}\nfunction invalidNodeType(nodeType) {\n return new ɵRuntimeError(3004 /* RuntimeErrorCode.INVALID_NODE_TYPE */, ngDevMode && `Unable to resolve animation metadata node #${nodeType}`);\n}\nfunction invalidCssUnitValue(userProvidedProperty, value) {\n return new ɵRuntimeError(3005 /* RuntimeErrorCode.INVALID_CSS_UNIT_VALUE */, ngDevMode && `Please provide a CSS unit value for ${userProvidedProperty}:${value}`);\n}\nfunction invalidTrigger() {\n return new ɵRuntimeError(3006 /* RuntimeErrorCode.INVALID_TRIGGER */, ngDevMode && \"animation triggers cannot be prefixed with an `@` sign (e.g. trigger('@foo', [...]))\");\n}\nfunction invalidDefinition() {\n return new ɵRuntimeError(3007 /* RuntimeErrorCode.INVALID_DEFINITION */, ngDevMode && 'only state() and transition() definitions can sit inside of a trigger()');\n}\nfunction invalidState(metadataName, missingSubs) {\n return new ɵRuntimeError(3008 /* RuntimeErrorCode.INVALID_STATE */, ngDevMode && `state(\"${metadataName}\", ...) must define default values for all the following style substitutions: ${missingSubs.join(', ')}`);\n}\nfunction invalidStyleValue(value) {\n return new ɵRuntimeError(3002 /* RuntimeErrorCode.INVALID_STYLE_VALUE */, ngDevMode && `The provided style string value ${value} is not allowed.`);\n}\nfunction invalidProperty(prop) {\n return new ɵRuntimeError(3009 /* RuntimeErrorCode.INVALID_PROPERTY */, ngDevMode && `The provided animation property \"${prop}\" is not a supported CSS property for animations`);\n}\nfunction invalidParallelAnimation(prop, firstStart, firstEnd, secondStart, secondEnd) {\n return new ɵRuntimeError(3010 /* RuntimeErrorCode.INVALID_PARALLEL_ANIMATION */, ngDevMode && `The CSS property \"${prop}\" that exists between the times of \"${firstStart}ms\" and \"${firstEnd}ms\" is also being animated in a parallel animation between the times of \"${secondStart}ms\" and \"${secondEnd}ms\"`);\n}\nfunction invalidKeyframes() {\n return new ɵRuntimeError(3011 /* RuntimeErrorCode.INVALID_KEYFRAMES */, ngDevMode && `keyframes() must be placed inside of a call to animate()`);\n}\nfunction invalidOffset() {\n return new ɵRuntimeError(3012 /* RuntimeErrorCode.INVALID_OFFSET */, ngDevMode && `Please ensure that all keyframe offsets are between 0 and 1`);\n}\nfunction keyframeOffsetsOutOfOrder() {\n return new ɵRuntimeError(3200 /* RuntimeErrorCode.KEYFRAME_OFFSETS_OUT_OF_ORDER */, ngDevMode && `Please ensure that all keyframe offsets are in order`);\n}\nfunction keyframesMissingOffsets() {\n return new ɵRuntimeError(3202 /* RuntimeErrorCode.KEYFRAMES_MISSING_OFFSETS */, ngDevMode && `Not all style() steps within the declared keyframes() contain offsets`);\n}\nfunction invalidStagger() {\n return new ɵRuntimeError(3013 /* RuntimeErrorCode.INVALID_STAGGER */, ngDevMode && `stagger() can only be used inside of query()`);\n}\nfunction invalidQuery(selector) {\n return new ɵRuntimeError(3014 /* RuntimeErrorCode.INVALID_QUERY */, ngDevMode && `\\`query(\"${selector}\")\\` returned zero elements. (Use \\`query(\"${selector}\", { optional: true })\\` if you wish to allow this.)`);\n}\nfunction invalidExpression(expr) {\n return new ɵRuntimeError(3015 /* RuntimeErrorCode.INVALID_EXPRESSION */, ngDevMode && `The provided transition expression \"${expr}\" is not supported`);\n}\nfunction invalidTransitionAlias(alias) {\n return new ɵRuntimeError(3016 /* RuntimeErrorCode.INVALID_TRANSITION_ALIAS */, ngDevMode && `The transition alias value \"${alias}\" is not supported`);\n}\nfunction validationFailed(errors) {\n return new ɵRuntimeError(3500 /* RuntimeErrorCode.VALIDATION_FAILED */, ngDevMode && `animation validation failed:\\n${errors.map(err => err.message).join('\\n')}`);\n}\nfunction buildingFailed(errors) {\n return new ɵRuntimeError(3501 /* RuntimeErrorCode.BUILDING_FAILED */, ngDevMode && `animation building failed:\\n${errors.map(err => err.message).join('\\n')}`);\n}\nfunction triggerBuildFailed(name, errors) {\n return new ɵRuntimeError(3404 /* RuntimeErrorCode.TRIGGER_BUILD_FAILED */, ngDevMode && `The animation trigger \"${name}\" has failed to build due to the following errors:\\n - ${errors.map(err => err.message).join('\\n - ')}`);\n}\nfunction animationFailed(errors) {\n return new ɵRuntimeError(3502 /* RuntimeErrorCode.ANIMATION_FAILED */, ngDevMode && `Unable to animate due to the following errors:${LINE_START}${errors.map(err => err.message).join(LINE_START)}`);\n}\nfunction registerFailed(errors) {\n return new ɵRuntimeError(3503 /* RuntimeErrorCode.REGISTRATION_FAILED */, ngDevMode && `Unable to build the animation due to the following errors: ${errors.map(err => err.message).join('\\n')}`);\n}\nfunction missingOrDestroyedAnimation() {\n return new ɵRuntimeError(3300 /* RuntimeErrorCode.MISSING_OR_DESTROYED_ANIMATION */, ngDevMode && \"The requested animation doesn't exist or has already been destroyed\");\n}\nfunction createAnimationFailed(errors) {\n return new ɵRuntimeError(3504 /* RuntimeErrorCode.CREATE_ANIMATION_FAILED */, ngDevMode && `Unable to create the animation due to the following errors:${errors.map(err => err.message).join('\\n')}`);\n}\nfunction missingPlayer(id) {\n return new ɵRuntimeError(3301 /* RuntimeErrorCode.MISSING_PLAYER */, ngDevMode && `Unable to find the timeline player referenced by ${id}`);\n}\nfunction missingTrigger(phase, name) {\n return new ɵRuntimeError(3302 /* RuntimeErrorCode.MISSING_TRIGGER */, ngDevMode && `Unable to listen on the animation trigger event \"${phase}\" because the animation trigger \"${name}\" doesn\\'t exist!`);\n}\nfunction missingEvent(name) {\n return new ɵRuntimeError(3303 /* RuntimeErrorCode.MISSING_EVENT */, ngDevMode && `Unable to listen on the animation trigger \"${name}\" because the provided event is undefined!`);\n}\nfunction unsupportedTriggerEvent(phase, name) {\n return new ɵRuntimeError(3400 /* RuntimeErrorCode.UNSUPPORTED_TRIGGER_EVENT */, ngDevMode && `The provided animation trigger event \"${phase}\" for the animation trigger \"${name}\" is not supported!`);\n}\nfunction unregisteredTrigger(name) {\n return new ɵRuntimeError(3401 /* RuntimeErrorCode.UNREGISTERED_TRIGGER */, ngDevMode && `The provided animation trigger \"${name}\" has not been registered!`);\n}\nfunction triggerTransitionsFailed(errors) {\n return new ɵRuntimeError(3402 /* RuntimeErrorCode.TRIGGER_TRANSITIONS_FAILED */, ngDevMode && `Unable to process animations due to the following failed trigger transitions\\n ${errors.map(err => err.message).join('\\n')}`);\n}\nfunction triggerParsingFailed(name, errors) {\n return new ɵRuntimeError(3403 /* RuntimeErrorCode.TRIGGER_PARSING_FAILED */, ngDevMode && `Animation parsing for the ${name} trigger have failed:${LINE_START}${errors.map(err => err.message).join(LINE_START)}`);\n}\nfunction transitionFailed(name, errors) {\n return new ɵRuntimeError(3505 /* RuntimeErrorCode.TRANSITION_FAILED */, ngDevMode && `@${name} has failed due to:\\n ${errors.map(err => err.message).join('\\n- ')}`);\n}\n\n/**\n * Set of all animatable CSS properties\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_animated_properties\n */\nconst ANIMATABLE_PROP_SET = new Set(['-moz-outline-radius', '-moz-outline-radius-bottomleft', '-moz-outline-radius-bottomright', '-moz-outline-radius-topleft', '-moz-outline-radius-topright', '-ms-grid-columns', '-ms-grid-rows', '-webkit-line-clamp', '-webkit-text-fill-color', '-webkit-text-stroke', '-webkit-text-stroke-color', 'accent-color', 'all', 'backdrop-filter', 'background', 'background-color', 'background-position', 'background-size', 'block-size', 'border', 'border-block-end', 'border-block-end-color', 'border-block-end-width', 'border-block-start', 'border-block-start-color', 'border-block-start-width', 'border-bottom', 'border-bottom-color', 'border-bottom-left-radius', 'border-bottom-right-radius', 'border-bottom-width', 'border-color', 'border-end-end-radius', 'border-end-start-radius', 'border-image-outset', 'border-image-slice', 'border-image-width', 'border-inline-end', 'border-inline-end-color', 'border-inline-end-width', 'border-inline-start', 'border-inline-start-color', 'border-inline-start-width', 'border-left', 'border-left-color', 'border-left-width', 'border-radius', 'border-right', 'border-right-color', 'border-right-width', 'border-start-end-radius', 'border-start-start-radius', 'border-top', 'border-top-color', 'border-top-left-radius', 'border-top-right-radius', 'border-top-width', 'border-width', 'bottom', 'box-shadow', 'caret-color', 'clip', 'clip-path', 'color', 'column-count', 'column-gap', 'column-rule', 'column-rule-color', 'column-rule-width', 'column-width', 'columns', 'filter', 'flex', 'flex-basis', 'flex-grow', 'flex-shrink', 'font', 'font-size', 'font-size-adjust', 'font-stretch', 'font-variation-settings', 'font-weight', 'gap', 'grid-column-gap', 'grid-gap', 'grid-row-gap', 'grid-template-columns', 'grid-template-rows', 'height', 'inline-size', 'input-security', 'inset', 'inset-block', 'inset-block-end', 'inset-block-start', 'inset-inline', 'inset-inline-end', 'inset-inline-start', 'left', 'letter-spacing', 'line-clamp', 'line-height', 'margin', 'margin-block-end', 'margin-block-start', 'margin-bottom', 'margin-inline-end', 'margin-inline-start', 'margin-left', 'margin-right', 'margin-top', 'mask', 'mask-border', 'mask-position', 'mask-size', 'max-block-size', 'max-height', 'max-inline-size', 'max-lines', 'max-width', 'min-block-size', 'min-height', 'min-inline-size', 'min-width', 'object-position', 'offset', 'offset-anchor', 'offset-distance', 'offset-path', 'offset-position', 'offset-rotate', 'opacity', 'order', 'outline', 'outline-color', 'outline-offset', 'outline-width', 'padding', 'padding-block-end', 'padding-block-start', 'padding-bottom', 'padding-inline-end', 'padding-inline-start', 'padding-left', 'padding-right', 'padding-top', 'perspective', 'perspective-origin', 'right', 'rotate', 'row-gap', 'scale', 'scroll-margin', 'scroll-margin-block', 'scroll-margin-block-end', 'scroll-margin-block-start', 'scroll-margin-bottom', 'scroll-margin-inline', 'scroll-margin-inline-end', 'scroll-margin-inline-start', 'scroll-margin-left', 'scroll-margin-right', 'scroll-margin-top', 'scroll-padding', 'scroll-padding-block', 'scroll-padding-block-end', 'scroll-padding-block-start', 'scroll-padding-bottom', 'scroll-padding-inline', 'scroll-padding-inline-end', 'scroll-padding-inline-start', 'scroll-padding-left', 'scroll-padding-right', 'scroll-padding-top', 'scroll-snap-coordinate', 'scroll-snap-destination', 'scrollbar-color', 'shape-image-threshold', 'shape-margin', 'shape-outside', 'tab-size', 'text-decoration', 'text-decoration-color', 'text-decoration-thickness', 'text-emphasis', 'text-emphasis-color', 'text-indent', 'text-shadow', 'text-underline-offset', 'top', 'transform', 'transform-origin', 'translate', 'vertical-align', 'visibility', 'width', 'word-spacing', 'z-index', 'zoom']);\nfunction optimizeGroupPlayer(players) {\n switch (players.length) {\n case 0:\n return new NoopAnimationPlayer();\n case 1:\n return players[0];\n default:\n return new ɵAnimationGroupPlayer(players);\n }\n}\nfunction normalizeKeyframes$1(normalizer, keyframes, preStyles = new Map(), postStyles = new Map()) {\n const errors = [];\n const normalizedKeyframes = [];\n let previousOffset = -1;\n let previousKeyframe = null;\n keyframes.forEach(kf => {\n const offset = kf.get('offset');\n const isSameOffset = offset == previousOffset;\n const normalizedKeyframe = isSameOffset && previousKeyframe || new Map();\n kf.forEach((val, prop) => {\n let normalizedProp = prop;\n let normalizedValue = val;\n if (prop !== 'offset') {\n normalizedProp = normalizer.normalizePropertyName(normalizedProp, errors);\n switch (normalizedValue) {\n case ɵPRE_STYLE:\n normalizedValue = preStyles.get(prop);\n break;\n case AUTO_STYLE:\n normalizedValue = postStyles.get(prop);\n break;\n default:\n normalizedValue = normalizer.normalizeStyleValue(prop, normalizedProp, normalizedValue, errors);\n break;\n }\n }\n normalizedKeyframe.set(normalizedProp, normalizedValue);\n });\n if (!isSameOffset) {\n normalizedKeyframes.push(normalizedKeyframe);\n }\n previousKeyframe = normalizedKeyframe;\n previousOffset = offset;\n });\n if (errors.length) {\n throw animationFailed(errors);\n }\n return normalizedKeyframes;\n}\nfunction listenOnPlayer(player, eventName, event, callback) {\n switch (eventName) {\n case 'start':\n player.onStart(() => callback(event && copyAnimationEvent(event, 'start', player)));\n break;\n case 'done':\n player.onDone(() => callback(event && copyAnimationEvent(event, 'done', player)));\n break;\n case 'destroy':\n player.onDestroy(() => callback(event && copyAnimationEvent(event, 'destroy', player)));\n break;\n }\n}\nfunction copyAnimationEvent(e, phaseName, player) {\n const totalTime = player.totalTime;\n const disabled = player.disabled ? true : false;\n const event = makeAnimationEvent(e.element, e.triggerName, e.fromState, e.toState, phaseName || e.phaseName, totalTime == undefined ? e.totalTime : totalTime, disabled);\n const data = e['_data'];\n if (data != null) {\n event['_data'] = data;\n }\n return event;\n}\nfunction makeAnimationEvent(element, triggerName, fromState, toState, phaseName = '', totalTime = 0, disabled) {\n return {\n element,\n triggerName,\n fromState,\n toState,\n phaseName,\n totalTime,\n disabled: !!disabled\n };\n}\nfunction getOrSetDefaultValue(map, key, defaultValue) {\n let value = map.get(key);\n if (!value) {\n map.set(key, value = defaultValue);\n }\n return value;\n}\nfunction parseTimelineCommand(command) {\n const separatorPos = command.indexOf(':');\n const id = command.substring(1, separatorPos);\n const action = command.slice(separatorPos + 1);\n return [id, action];\n}\nconst documentElement = /* @__PURE__ */(() => typeof document === 'undefined' ? null : document.documentElement)();\nfunction getParentElement(element) {\n const parent = element.parentNode || element.host || null; // consider host to support shadow DOM\n if (parent === documentElement) {\n return null;\n }\n return parent;\n}\nfunction containsVendorPrefix(prop) {\n // Webkit is the only real popular vendor prefix nowadays\n // cc: http://shouldiprefix.com/\n return prop.substring(1, 6) == 'ebkit'; // webkit or Webkit\n}\nlet _CACHED_BODY = null;\nlet _IS_WEBKIT = false;\nfunction validateStyleProperty(prop) {\n if (!_CACHED_BODY) {\n _CACHED_BODY = getBodyNode() || {};\n _IS_WEBKIT = _CACHED_BODY.style ? 'WebkitAppearance' in _CACHED_BODY.style : false;\n }\n let result = true;\n if (_CACHED_BODY.style && !containsVendorPrefix(prop)) {\n result = prop in _CACHED_BODY.style;\n if (!result && _IS_WEBKIT) {\n const camelProp = 'Webkit' + prop.charAt(0).toUpperCase() + prop.slice(1);\n result = camelProp in _CACHED_BODY.style;\n }\n }\n return result;\n}\nfunction validateWebAnimatableStyleProperty(prop) {\n return ANIMATABLE_PROP_SET.has(prop);\n}\nfunction getBodyNode() {\n if (typeof document != 'undefined') {\n return document.body;\n }\n return null;\n}\nfunction containsElement(elm1, elm2) {\n while (elm2) {\n if (elm2 === elm1) {\n return true;\n }\n elm2 = getParentElement(elm2);\n }\n return false;\n}\nfunction invokeQuery(element, selector, multi) {\n if (multi) {\n return Array.from(element.querySelectorAll(selector));\n }\n const elem = element.querySelector(selector);\n return elem ? [elem] : [];\n}\nfunction hypenatePropsKeys(original) {\n const newMap = new Map();\n original.forEach((val, prop) => {\n const newProp = prop.replace(/([a-z])([A-Z])/g, '$1-$2');\n newMap.set(newProp, val);\n });\n return newMap;\n}\n\n/**\n * @publicApi\n *\n * `AnimationDriver` implentation for Noop animations\n */\nclass NoopAnimationDriver {\n /**\n * @returns Whether `prop` is a valid CSS property\n */\n validateStyleProperty(prop) {\n return validateStyleProperty(prop);\n }\n /**\n *\n * @returns Whether elm1 contains elm2.\n */\n containsElement(elm1, elm2) {\n return containsElement(elm1, elm2);\n }\n /**\n * @returns Rhe parent of the given element or `null` if the element is the `document`\n */\n getParentElement(element) {\n return getParentElement(element);\n }\n /**\n * @returns The result of the query selector on the element. The array will contain up to 1 item\n * if `multi` is `false`.\n */\n query(element, selector, multi) {\n return invokeQuery(element, selector, multi);\n }\n /**\n * @returns The `defaultValue` or empty string\n */\n computeStyle(element, prop, defaultValue) {\n return defaultValue || '';\n }\n /**\n * @returns An `NoopAnimationPlayer`\n */\n animate(element, keyframes, duration, delay, easing, previousPlayers = [], scrubberAccessRequested) {\n return new NoopAnimationPlayer(duration, delay);\n }\n static {\n this.ɵfac = function NoopAnimationDriver_Factory(ɵt) {\n return new (ɵt || NoopAnimationDriver)();\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: NoopAnimationDriver,\n factory: NoopAnimationDriver.ɵfac\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(NoopAnimationDriver, [{\n type: Injectable\n }], null, null);\n})();\n/**\n * @publicApi\n */\nclass AnimationDriver {\n /**\n * @deprecated Use the NoopAnimationDriver class.\n */\n static {\n this.NOOP = new NoopAnimationDriver();\n }\n}\nclass AnimationStyleNormalizer {}\nclass NoopAnimationStyleNormalizer {\n normalizePropertyName(propertyName, errors) {\n return propertyName;\n }\n normalizeStyleValue(userProvidedProperty, normalizedProperty, value, errors) {\n return value;\n }\n}\nconst ONE_SECOND = 1000;\nconst SUBSTITUTION_EXPR_START = '{{';\nconst SUBSTITUTION_EXPR_END = '}}';\nconst ENTER_CLASSNAME = 'ng-enter';\nconst LEAVE_CLASSNAME = 'ng-leave';\nconst NG_TRIGGER_CLASSNAME = 'ng-trigger';\nconst NG_TRIGGER_SELECTOR = '.ng-trigger';\nconst NG_ANIMATING_CLASSNAME = 'ng-animating';\nconst NG_ANIMATING_SELECTOR = '.ng-animating';\nfunction resolveTimingValue(value) {\n if (typeof value == 'number') return value;\n const matches = value.match(/^(-?[\\.\\d]+)(m?s)/);\n if (!matches || matches.length < 2) return 0;\n return _convertTimeValueToMS(parseFloat(matches[1]), matches[2]);\n}\nfunction _convertTimeValueToMS(value, unit) {\n switch (unit) {\n case 's':\n return value * ONE_SECOND;\n default:\n // ms or something else\n return value;\n }\n}\nfunction resolveTiming(timings, errors, allowNegativeValues) {\n return timings.hasOwnProperty('duration') ? timings : parseTimeExpression(timings, errors, allowNegativeValues);\n}\nfunction parseTimeExpression(exp, errors, allowNegativeValues) {\n const regex = /^(-?[\\.\\d]+)(m?s)(?:\\s+(-?[\\.\\d]+)(m?s))?(?:\\s+([-a-z]+(?:\\(.+?\\))?))?$/i;\n let duration;\n let delay = 0;\n let easing = '';\n if (typeof exp === 'string') {\n const matches = exp.match(regex);\n if (matches === null) {\n errors.push(invalidTimingValue(exp));\n return {\n duration: 0,\n delay: 0,\n easing: ''\n };\n }\n duration = _convertTimeValueToMS(parseFloat(matches[1]), matches[2]);\n const delayMatch = matches[3];\n if (delayMatch != null) {\n delay = _convertTimeValueToMS(parseFloat(delayMatch), matches[4]);\n }\n const easingVal = matches[5];\n if (easingVal) {\n easing = easingVal;\n }\n } else {\n duration = exp;\n }\n if (!allowNegativeValues) {\n let containsErrors = false;\n let startIndex = errors.length;\n if (duration < 0) {\n errors.push(negativeStepValue());\n containsErrors = true;\n }\n if (delay < 0) {\n errors.push(negativeDelayValue());\n containsErrors = true;\n }\n if (containsErrors) {\n errors.splice(startIndex, 0, invalidTimingValue(exp));\n }\n }\n return {\n duration,\n delay,\n easing\n };\n}\nfunction normalizeKeyframes(keyframes) {\n if (!keyframes.length) {\n return [];\n }\n if (keyframes[0] instanceof Map) {\n return keyframes;\n }\n return keyframes.map(kf => new Map(Object.entries(kf)));\n}\nfunction normalizeStyles(styles) {\n return Array.isArray(styles) ? new Map(...styles) : new Map(styles);\n}\nfunction setStyles(element, styles, formerStyles) {\n styles.forEach((val, prop) => {\n const camelProp = dashCaseToCamelCase(prop);\n if (formerStyles && !formerStyles.has(prop)) {\n formerStyles.set(prop, element.style[camelProp]);\n }\n element.style[camelProp] = val;\n });\n}\nfunction eraseStyles(element, styles) {\n styles.forEach((_, prop) => {\n const camelProp = dashCaseToCamelCase(prop);\n element.style[camelProp] = '';\n });\n}\nfunction normalizeAnimationEntry(steps) {\n if (Array.isArray(steps)) {\n if (steps.length == 1) return steps[0];\n return sequence(steps);\n }\n return steps;\n}\nfunction validateStyleParams(value, options, errors) {\n const params = options.params || {};\n const matches = extractStyleParams(value);\n if (matches.length) {\n matches.forEach(varName => {\n if (!params.hasOwnProperty(varName)) {\n errors.push(invalidStyleParams(varName));\n }\n });\n }\n}\nconst PARAM_REGEX = new RegExp(`${SUBSTITUTION_EXPR_START}\\\\s*(.+?)\\\\s*${SUBSTITUTION_EXPR_END}`, 'g');\nfunction extractStyleParams(value) {\n let params = [];\n if (typeof value === 'string') {\n let match;\n while (match = PARAM_REGEX.exec(value)) {\n params.push(match[1]);\n }\n PARAM_REGEX.lastIndex = 0;\n }\n return params;\n}\nfunction interpolateParams(value, params, errors) {\n const original = `${value}`;\n const str = original.replace(PARAM_REGEX, (_, varName) => {\n let localVal = params[varName];\n // this means that the value was never overridden by the data passed in by the user\n if (localVal == null) {\n errors.push(invalidParamValue(varName));\n localVal = '';\n }\n return localVal.toString();\n });\n // we do this to assert that numeric values stay as they are\n return str == original ? value : str;\n}\nconst DASH_CASE_REGEXP = /-+([a-z0-9])/g;\nfunction dashCaseToCamelCase(input) {\n return input.replace(DASH_CASE_REGEXP, (...m) => m[1].toUpperCase());\n}\nfunction camelCaseToDashCase(input) {\n return input.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();\n}\nfunction allowPreviousPlayerStylesMerge(duration, delay) {\n return duration === 0 || delay === 0;\n}\nfunction balancePreviousStylesIntoKeyframes(element, keyframes, previousStyles) {\n if (previousStyles.size && keyframes.length) {\n let startingKeyframe = keyframes[0];\n let missingStyleProps = [];\n previousStyles.forEach((val, prop) => {\n if (!startingKeyframe.has(prop)) {\n missingStyleProps.push(prop);\n }\n startingKeyframe.set(prop, val);\n });\n if (missingStyleProps.length) {\n for (let i = 1; i < keyframes.length; i++) {\n let kf = keyframes[i];\n missingStyleProps.forEach(prop => kf.set(prop, computeStyle(element, prop)));\n }\n }\n }\n return keyframes;\n}\nfunction visitDslNode(visitor, node, context) {\n switch (node.type) {\n case AnimationMetadataType.Trigger:\n return visitor.visitTrigger(node, context);\n case AnimationMetadataType.State:\n return visitor.visitState(node, context);\n case AnimationMetadataType.Transition:\n return visitor.visitTransition(node, context);\n case AnimationMetadataType.Sequence:\n return visitor.visitSequence(node, context);\n case AnimationMetadataType.Group:\n return visitor.visitGroup(node, context);\n case AnimationMetadataType.Animate:\n return visitor.visitAnimate(node, context);\n case AnimationMetadataType.Keyframes:\n return visitor.visitKeyframes(node, context);\n case AnimationMetadataType.Style:\n return visitor.visitStyle(node, context);\n case AnimationMetadataType.Reference:\n return visitor.visitReference(node, context);\n case AnimationMetadataType.AnimateChild:\n return visitor.visitAnimateChild(node, context);\n case AnimationMetadataType.AnimateRef:\n return visitor.visitAnimateRef(node, context);\n case AnimationMetadataType.Query:\n return visitor.visitQuery(node, context);\n case AnimationMetadataType.Stagger:\n return visitor.visitStagger(node, context);\n default:\n throw invalidNodeType(node.type);\n }\n}\nfunction computeStyle(element, prop) {\n return window.getComputedStyle(element)[prop];\n}\nconst DIMENSIONAL_PROP_SET = new Set(['width', 'height', 'minWidth', 'minHeight', 'maxWidth', 'maxHeight', 'left', 'top', 'bottom', 'right', 'fontSize', 'outlineWidth', 'outlineOffset', 'paddingTop', 'paddingLeft', 'paddingBottom', 'paddingRight', 'marginTop', 'marginLeft', 'marginBottom', 'marginRight', 'borderRadius', 'borderWidth', 'borderTopWidth', 'borderLeftWidth', 'borderRightWidth', 'borderBottomWidth', 'textIndent', 'perspective']);\nclass WebAnimationsStyleNormalizer extends AnimationStyleNormalizer {\n normalizePropertyName(propertyName, errors) {\n return dashCaseToCamelCase(propertyName);\n }\n normalizeStyleValue(userProvidedProperty, normalizedProperty, value, errors) {\n let unit = '';\n const strVal = value.toString().trim();\n if (DIMENSIONAL_PROP_SET.has(normalizedProperty) && value !== 0 && value !== '0') {\n if (typeof value === 'number') {\n unit = 'px';\n } else {\n const valAndSuffixMatch = value.match(/^[+-]?[\\d\\.]+([a-z]*)$/);\n if (valAndSuffixMatch && valAndSuffixMatch[1].length == 0) {\n errors.push(invalidCssUnitValue(userProvidedProperty, value));\n }\n }\n }\n return strVal + unit;\n }\n}\nfunction createListOfWarnings(warnings) {\n const LINE_START = '\\n - ';\n return `${LINE_START}${warnings.filter(Boolean).map(warning => warning).join(LINE_START)}`;\n}\nfunction warnValidation(warnings) {\n (typeof ngDevMode === 'undefined' || ngDevMode) && console.warn(`animation validation warnings:${createListOfWarnings(warnings)}`);\n}\nfunction warnTriggerBuild(name, warnings) {\n (typeof ngDevMode === 'undefined' || ngDevMode) && console.warn(`The animation trigger \"${name}\" has built with the following warnings:${createListOfWarnings(warnings)}`);\n}\nfunction warnRegister(warnings) {\n (typeof ngDevMode === 'undefined' || ngDevMode) && console.warn(`Animation built with the following warnings:${createListOfWarnings(warnings)}`);\n}\nfunction triggerParsingWarnings(name, warnings) {\n (typeof ngDevMode === 'undefined' || ngDevMode) && console.warn(`Animation parsing for the ${name} trigger presents the following warnings:${createListOfWarnings(warnings)}`);\n}\nfunction pushUnrecognizedPropertiesWarning(warnings, props) {\n if (props.length) {\n warnings.push(`The following provided properties are not recognized: ${props.join(', ')}`);\n }\n}\nconst ANY_STATE = '*';\nfunction parseTransitionExpr(transitionValue, errors) {\n const expressions = [];\n if (typeof transitionValue == 'string') {\n transitionValue.split(/\\s*,\\s*/).forEach(str => parseInnerTransitionStr(str, expressions, errors));\n } else {\n expressions.push(transitionValue);\n }\n return expressions;\n}\nfunction parseInnerTransitionStr(eventStr, expressions, errors) {\n if (eventStr[0] == ':') {\n const result = parseAnimationAlias(eventStr, errors);\n if (typeof result == 'function') {\n expressions.push(result);\n return;\n }\n eventStr = result;\n }\n const match = eventStr.match(/^(\\*|[-\\w]+)\\s*()\\s*(\\*|[-\\w]+)$/);\n if (match == null || match.length < 4) {\n errors.push(invalidExpression(eventStr));\n return expressions;\n }\n const fromState = match[1];\n const separator = match[2];\n const toState = match[3];\n expressions.push(makeLambdaFromStates(fromState, toState));\n const isFullAnyStateExpr = fromState == ANY_STATE && toState == ANY_STATE;\n if (separator[0] == '<' && !isFullAnyStateExpr) {\n expressions.push(makeLambdaFromStates(toState, fromState));\n }\n return;\n}\nfunction parseAnimationAlias(alias, errors) {\n switch (alias) {\n case ':enter':\n return 'void => *';\n case ':leave':\n return '* => void';\n case ':increment':\n return (fromState, toState) => parseFloat(toState) > parseFloat(fromState);\n case ':decrement':\n return (fromState, toState) => parseFloat(toState) < parseFloat(fromState);\n default:\n errors.push(invalidTransitionAlias(alias));\n return '* => *';\n }\n}\n// DO NOT REFACTOR ... keep the follow set instantiations\n// with the values intact (closure compiler for some reason\n// removes follow-up lines that add the values outside of\n// the constructor...\nconst TRUE_BOOLEAN_VALUES = new Set(['true', '1']);\nconst FALSE_BOOLEAN_VALUES = new Set(['false', '0']);\nfunction makeLambdaFromStates(lhs, rhs) {\n const LHS_MATCH_BOOLEAN = TRUE_BOOLEAN_VALUES.has(lhs) || FALSE_BOOLEAN_VALUES.has(lhs);\n const RHS_MATCH_BOOLEAN = TRUE_BOOLEAN_VALUES.has(rhs) || FALSE_BOOLEAN_VALUES.has(rhs);\n return (fromState, toState) => {\n let lhsMatch = lhs == ANY_STATE || lhs == fromState;\n let rhsMatch = rhs == ANY_STATE || rhs == toState;\n if (!lhsMatch && LHS_MATCH_BOOLEAN && typeof fromState === 'boolean') {\n lhsMatch = fromState ? TRUE_BOOLEAN_VALUES.has(lhs) : FALSE_BOOLEAN_VALUES.has(lhs);\n }\n if (!rhsMatch && RHS_MATCH_BOOLEAN && typeof toState === 'boolean') {\n rhsMatch = toState ? TRUE_BOOLEAN_VALUES.has(rhs) : FALSE_BOOLEAN_VALUES.has(rhs);\n }\n return lhsMatch && rhsMatch;\n };\n}\nconst SELF_TOKEN = ':self';\nconst SELF_TOKEN_REGEX = new RegExp(`s*${SELF_TOKEN}s*,?`, 'g');\n/*\n * [Validation]\n * The visitor code below will traverse the animation AST generated by the animation verb functions\n * (the output is a tree of objects) and attempt to perform a series of validations on the data. The\n * following corner-cases will be validated:\n *\n * 1. Overlap of animations\n * Given that a CSS property cannot be animated in more than one place at the same time, it's\n * important that this behavior is detected and validated. The way in which this occurs is that\n * each time a style property is examined, a string-map containing the property will be updated with\n * the start and end times for when the property is used within an animation step.\n *\n * If there are two or more parallel animations that are currently running (these are invoked by the\n * group()) on the same element then the validator will throw an error. Since the start/end timing\n * values are collected for each property then if the current animation step is animating the same\n * property and its timing values fall anywhere into the window of time that the property is\n * currently being animated within then this is what causes an error.\n *\n * 2. Timing values\n * The validator will validate to see if a timing value of `duration delay easing` or\n * `durationNumber` is valid or not.\n *\n * (note that upon validation the code below will replace the timing data with an object containing\n * {duration,delay,easing}.\n *\n * 3. Offset Validation\n * Each of the style() calls are allowed to have an offset value when placed inside of keyframes().\n * Offsets within keyframes() are considered valid when:\n *\n * - No offsets are used at all\n * - Each style() entry contains an offset value\n * - Each offset is between 0 and 1\n * - Each offset is greater to or equal than the previous one\n *\n * Otherwise an error will be thrown.\n */\nfunction buildAnimationAst(driver, metadata, errors, warnings) {\n return new AnimationAstBuilderVisitor(driver).build(metadata, errors, warnings);\n}\nconst ROOT_SELECTOR = '';\nclass AnimationAstBuilderVisitor {\n constructor(_driver) {\n this._driver = _driver;\n }\n build(metadata, errors, warnings) {\n const context = new AnimationAstBuilderContext(errors);\n this._resetContextStyleTimingState(context);\n const ast = visitDslNode(this, normalizeAnimationEntry(metadata), context);\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n if (context.unsupportedCSSPropertiesFound.size) {\n pushUnrecognizedPropertiesWarning(warnings, [...context.unsupportedCSSPropertiesFound.keys()]);\n }\n }\n return ast;\n }\n _resetContextStyleTimingState(context) {\n context.currentQuerySelector = ROOT_SELECTOR;\n context.collectedStyles = new Map();\n context.collectedStyles.set(ROOT_SELECTOR, new Map());\n context.currentTime = 0;\n }\n visitTrigger(metadata, context) {\n let queryCount = context.queryCount = 0;\n let depCount = context.depCount = 0;\n const states = [];\n const transitions = [];\n if (metadata.name.charAt(0) == '@') {\n context.errors.push(invalidTrigger());\n }\n metadata.definitions.forEach(def => {\n this._resetContextStyleTimingState(context);\n if (def.type == AnimationMetadataType.State) {\n const stateDef = def;\n const name = stateDef.name;\n name.toString().split(/\\s*,\\s*/).forEach(n => {\n stateDef.name = n;\n states.push(this.visitState(stateDef, context));\n });\n stateDef.name = name;\n } else if (def.type == AnimationMetadataType.Transition) {\n const transition = this.visitTransition(def, context);\n queryCount += transition.queryCount;\n depCount += transition.depCount;\n transitions.push(transition);\n } else {\n context.errors.push(invalidDefinition());\n }\n });\n return {\n type: AnimationMetadataType.Trigger,\n name: metadata.name,\n states,\n transitions,\n queryCount,\n depCount,\n options: null\n };\n }\n visitState(metadata, context) {\n const styleAst = this.visitStyle(metadata.styles, context);\n const astParams = metadata.options && metadata.options.params || null;\n if (styleAst.containsDynamicStyles) {\n const missingSubs = new Set();\n const params = astParams || {};\n styleAst.styles.forEach(style => {\n if (style instanceof Map) {\n style.forEach(value => {\n extractStyleParams(value).forEach(sub => {\n if (!params.hasOwnProperty(sub)) {\n missingSubs.add(sub);\n }\n });\n });\n }\n });\n if (missingSubs.size) {\n context.errors.push(invalidState(metadata.name, [...missingSubs.values()]));\n }\n }\n return {\n type: AnimationMetadataType.State,\n name: metadata.name,\n style: styleAst,\n options: astParams ? {\n params: astParams\n } : null\n };\n }\n visitTransition(metadata, context) {\n context.queryCount = 0;\n context.depCount = 0;\n const animation = visitDslNode(this, normalizeAnimationEntry(metadata.animation), context);\n const matchers = parseTransitionExpr(metadata.expr, context.errors);\n return {\n type: AnimationMetadataType.Transition,\n matchers,\n animation,\n queryCount: context.queryCount,\n depCount: context.depCount,\n options: normalizeAnimationOptions(metadata.options)\n };\n }\n visitSequence(metadata, context) {\n return {\n type: AnimationMetadataType.Sequence,\n steps: metadata.steps.map(s => visitDslNode(this, s, context)),\n options: normalizeAnimationOptions(metadata.options)\n };\n }\n visitGroup(metadata, context) {\n const currentTime = context.currentTime;\n let furthestTime = 0;\n const steps = metadata.steps.map(step => {\n context.currentTime = currentTime;\n const innerAst = visitDslNode(this, step, context);\n furthestTime = Math.max(furthestTime, context.currentTime);\n return innerAst;\n });\n context.currentTime = furthestTime;\n return {\n type: AnimationMetadataType.Group,\n steps,\n options: normalizeAnimationOptions(metadata.options)\n };\n }\n visitAnimate(metadata, context) {\n const timingAst = constructTimingAst(metadata.timings, context.errors);\n context.currentAnimateTimings = timingAst;\n let styleAst;\n let styleMetadata = metadata.styles ? metadata.styles : style({});\n if (styleMetadata.type == AnimationMetadataType.Keyframes) {\n styleAst = this.visitKeyframes(styleMetadata, context);\n } else {\n let styleMetadata = metadata.styles;\n let isEmpty = false;\n if (!styleMetadata) {\n isEmpty = true;\n const newStyleData = {};\n if (timingAst.easing) {\n newStyleData['easing'] = timingAst.easing;\n }\n styleMetadata = style(newStyleData);\n }\n context.currentTime += timingAst.duration + timingAst.delay;\n const _styleAst = this.visitStyle(styleMetadata, context);\n _styleAst.isEmptyStep = isEmpty;\n styleAst = _styleAst;\n }\n context.currentAnimateTimings = null;\n return {\n type: AnimationMetadataType.Animate,\n timings: timingAst,\n style: styleAst,\n options: null\n };\n }\n visitStyle(metadata, context) {\n const ast = this._makeStyleAst(metadata, context);\n this._validateStyleAst(ast, context);\n return ast;\n }\n _makeStyleAst(metadata, context) {\n const styles = [];\n const metadataStyles = Array.isArray(metadata.styles) ? metadata.styles : [metadata.styles];\n for (let styleTuple of metadataStyles) {\n if (typeof styleTuple === 'string') {\n if (styleTuple === AUTO_STYLE) {\n styles.push(styleTuple);\n } else {\n context.errors.push(invalidStyleValue(styleTuple));\n }\n } else {\n styles.push(new Map(Object.entries(styleTuple)));\n }\n }\n let containsDynamicStyles = false;\n let collectedEasing = null;\n styles.forEach(styleData => {\n if (styleData instanceof Map) {\n if (styleData.has('easing')) {\n collectedEasing = styleData.get('easing');\n styleData.delete('easing');\n }\n if (!containsDynamicStyles) {\n for (let value of styleData.values()) {\n if (value.toString().indexOf(SUBSTITUTION_EXPR_START) >= 0) {\n containsDynamicStyles = true;\n break;\n }\n }\n }\n }\n });\n return {\n type: AnimationMetadataType.Style,\n styles,\n easing: collectedEasing,\n offset: metadata.offset,\n containsDynamicStyles,\n options: null\n };\n }\n _validateStyleAst(ast, context) {\n const timings = context.currentAnimateTimings;\n let endTime = context.currentTime;\n let startTime = context.currentTime;\n if (timings && startTime > 0) {\n startTime -= timings.duration + timings.delay;\n }\n ast.styles.forEach(tuple => {\n if (typeof tuple === 'string') return;\n tuple.forEach((value, prop) => {\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n if (!this._driver.validateStyleProperty(prop)) {\n tuple.delete(prop);\n context.unsupportedCSSPropertiesFound.add(prop);\n return;\n }\n }\n // This is guaranteed to have a defined Map at this querySelector location making it\n // safe to add the assertion here. It is set as a default empty map in prior methods.\n const collectedStyles = context.collectedStyles.get(context.currentQuerySelector);\n const collectedEntry = collectedStyles.get(prop);\n let updateCollectedStyle = true;\n if (collectedEntry) {\n if (startTime != endTime && startTime >= collectedEntry.startTime && endTime <= collectedEntry.endTime) {\n context.errors.push(invalidParallelAnimation(prop, collectedEntry.startTime, collectedEntry.endTime, startTime, endTime));\n updateCollectedStyle = false;\n }\n // we always choose the smaller start time value since we\n // want to have a record of the entire animation window where\n // the style property is being animated in between\n startTime = collectedEntry.startTime;\n }\n if (updateCollectedStyle) {\n collectedStyles.set(prop, {\n startTime,\n endTime\n });\n }\n if (context.options) {\n validateStyleParams(value, context.options, context.errors);\n }\n });\n });\n }\n visitKeyframes(metadata, context) {\n const ast = {\n type: AnimationMetadataType.Keyframes,\n styles: [],\n options: null\n };\n if (!context.currentAnimateTimings) {\n context.errors.push(invalidKeyframes());\n return ast;\n }\n const MAX_KEYFRAME_OFFSET = 1;\n let totalKeyframesWithOffsets = 0;\n const offsets = [];\n let offsetsOutOfOrder = false;\n let keyframesOutOfRange = false;\n let previousOffset = 0;\n const keyframes = metadata.steps.map(styles => {\n const style = this._makeStyleAst(styles, context);\n let offsetVal = style.offset != null ? style.offset : consumeOffset(style.styles);\n let offset = 0;\n if (offsetVal != null) {\n totalKeyframesWithOffsets++;\n offset = style.offset = offsetVal;\n }\n keyframesOutOfRange = keyframesOutOfRange || offset < 0 || offset > 1;\n offsetsOutOfOrder = offsetsOutOfOrder || offset < previousOffset;\n previousOffset = offset;\n offsets.push(offset);\n return style;\n });\n if (keyframesOutOfRange) {\n context.errors.push(invalidOffset());\n }\n if (offsetsOutOfOrder) {\n context.errors.push(keyframeOffsetsOutOfOrder());\n }\n const length = metadata.steps.length;\n let generatedOffset = 0;\n if (totalKeyframesWithOffsets > 0 && totalKeyframesWithOffsets < length) {\n context.errors.push(keyframesMissingOffsets());\n } else if (totalKeyframesWithOffsets == 0) {\n generatedOffset = MAX_KEYFRAME_OFFSET / (length - 1);\n }\n const limit = length - 1;\n const currentTime = context.currentTime;\n const currentAnimateTimings = context.currentAnimateTimings;\n const animateDuration = currentAnimateTimings.duration;\n keyframes.forEach((kf, i) => {\n const offset = generatedOffset > 0 ? i == limit ? 1 : generatedOffset * i : offsets[i];\n const durationUpToThisFrame = offset * animateDuration;\n context.currentTime = currentTime + currentAnimateTimings.delay + durationUpToThisFrame;\n currentAnimateTimings.duration = durationUpToThisFrame;\n this._validateStyleAst(kf, context);\n kf.offset = offset;\n ast.styles.push(kf);\n });\n return ast;\n }\n visitReference(metadata, context) {\n return {\n type: AnimationMetadataType.Reference,\n animation: visitDslNode(this, normalizeAnimationEntry(metadata.animation), context),\n options: normalizeAnimationOptions(metadata.options)\n };\n }\n visitAnimateChild(metadata, context) {\n context.depCount++;\n return {\n type: AnimationMetadataType.AnimateChild,\n options: normalizeAnimationOptions(metadata.options)\n };\n }\n visitAnimateRef(metadata, context) {\n return {\n type: AnimationMetadataType.AnimateRef,\n animation: this.visitReference(metadata.animation, context),\n options: normalizeAnimationOptions(metadata.options)\n };\n }\n visitQuery(metadata, context) {\n const parentSelector = context.currentQuerySelector;\n const options = metadata.options || {};\n context.queryCount++;\n context.currentQuery = metadata;\n const [selector, includeSelf] = normalizeSelector(metadata.selector);\n context.currentQuerySelector = parentSelector.length ? parentSelector + ' ' + selector : selector;\n getOrSetDefaultValue(context.collectedStyles, context.currentQuerySelector, new Map());\n const animation = visitDslNode(this, normalizeAnimationEntry(metadata.animation), context);\n context.currentQuery = null;\n context.currentQuerySelector = parentSelector;\n return {\n type: AnimationMetadataType.Query,\n selector,\n limit: options.limit || 0,\n optional: !!options.optional,\n includeSelf,\n animation,\n originalSelector: metadata.selector,\n options: normalizeAnimationOptions(metadata.options)\n };\n }\n visitStagger(metadata, context) {\n if (!context.currentQuery) {\n context.errors.push(invalidStagger());\n }\n const timings = metadata.timings === 'full' ? {\n duration: 0,\n delay: 0,\n easing: 'full'\n } : resolveTiming(metadata.timings, context.errors, true);\n return {\n type: AnimationMetadataType.Stagger,\n animation: visitDslNode(this, normalizeAnimationEntry(metadata.animation), context),\n timings,\n options: null\n };\n }\n}\nfunction normalizeSelector(selector) {\n const hasAmpersand = selector.split(/\\s*,\\s*/).find(token => token == SELF_TOKEN) ? true : false;\n if (hasAmpersand) {\n selector = selector.replace(SELF_TOKEN_REGEX, '');\n }\n // Note: the :enter and :leave aren't normalized here since those\n // selectors are filled in at runtime during timeline building\n selector = selector.replace(/@\\*/g, NG_TRIGGER_SELECTOR).replace(/@\\w+/g, match => NG_TRIGGER_SELECTOR + '-' + match.slice(1)).replace(/:animating/g, NG_ANIMATING_SELECTOR);\n return [selector, hasAmpersand];\n}\nfunction normalizeParams(obj) {\n return obj ? {\n ...obj\n } : null;\n}\nclass AnimationAstBuilderContext {\n constructor(errors) {\n this.errors = errors;\n this.queryCount = 0;\n this.depCount = 0;\n this.currentTransition = null;\n this.currentQuery = null;\n this.currentQuerySelector = null;\n this.currentAnimateTimings = null;\n this.currentTime = 0;\n this.collectedStyles = new Map();\n this.options = null;\n this.unsupportedCSSPropertiesFound = new Set();\n }\n}\nfunction consumeOffset(styles) {\n if (typeof styles == 'string') return null;\n let offset = null;\n if (Array.isArray(styles)) {\n styles.forEach(styleTuple => {\n if (styleTuple instanceof Map && styleTuple.has('offset')) {\n const obj = styleTuple;\n offset = parseFloat(obj.get('offset'));\n obj.delete('offset');\n }\n });\n } else if (styles instanceof Map && styles.has('offset')) {\n const obj = styles;\n offset = parseFloat(obj.get('offset'));\n obj.delete('offset');\n }\n return offset;\n}\nfunction constructTimingAst(value, errors) {\n if (value.hasOwnProperty('duration')) {\n return value;\n }\n if (typeof value == 'number') {\n const duration = resolveTiming(value, errors).duration;\n return makeTimingAst(duration, 0, '');\n }\n const strValue = value;\n const isDynamic = strValue.split(/\\s+/).some(v => v.charAt(0) == '{' && v.charAt(1) == '{');\n if (isDynamic) {\n const ast = makeTimingAst(0, 0, '');\n ast.dynamic = true;\n ast.strValue = strValue;\n return ast;\n }\n const timings = resolveTiming(strValue, errors);\n return makeTimingAst(timings.duration, timings.delay, timings.easing);\n}\nfunction normalizeAnimationOptions(options) {\n if (options) {\n options = {\n ...options\n };\n if (options['params']) {\n options['params'] = normalizeParams(options['params']);\n }\n } else {\n options = {};\n }\n return options;\n}\nfunction makeTimingAst(duration, delay, easing) {\n return {\n duration,\n delay,\n easing\n };\n}\nfunction createTimelineInstruction(element, keyframes, preStyleProps, postStyleProps, duration, delay, easing = null, subTimeline = false) {\n return {\n type: 1 /* AnimationTransitionInstructionType.TimelineAnimation */,\n element,\n keyframes,\n preStyleProps,\n postStyleProps,\n duration,\n delay,\n totalTime: duration + delay,\n easing,\n subTimeline\n };\n}\nclass ElementInstructionMap {\n constructor() {\n this._map = new Map();\n }\n get(element) {\n return this._map.get(element) || [];\n }\n append(element, instructions) {\n let existingInstructions = this._map.get(element);\n if (!existingInstructions) {\n this._map.set(element, existingInstructions = []);\n }\n existingInstructions.push(...instructions);\n }\n has(element) {\n return this._map.has(element);\n }\n clear() {\n this._map.clear();\n }\n}\nconst ONE_FRAME_IN_MILLISECONDS = 1;\nconst ENTER_TOKEN = ':enter';\nconst ENTER_TOKEN_REGEX = new RegExp(ENTER_TOKEN, 'g');\nconst LEAVE_TOKEN = ':leave';\nconst LEAVE_TOKEN_REGEX = new RegExp(LEAVE_TOKEN, 'g');\n/*\n * The code within this file aims to generate web-animations-compatible keyframes from Angular's\n * animation DSL code.\n *\n * The code below will be converted from:\n *\n * ```\n * sequence([\n * style({ opacity: 0 }),\n * animate(1000, style({ opacity: 0 }))\n * ])\n * ```\n *\n * To:\n * ```\n * keyframes = [{ opacity: 0, offset: 0 }, { opacity: 1, offset: 1 }]\n * duration = 1000\n * delay = 0\n * easing = ''\n * ```\n *\n * For this operation to cover the combination of animation verbs (style, animate, group, etc...) a\n * combination of AST traversal and merge-sort-like algorithms are used.\n *\n * [AST Traversal]\n * Each of the animation verbs, when executed, will return an string-map object representing what\n * type of action it is (style, animate, group, etc...) and the data associated with it. This means\n * that when functional composition mix of these functions is evaluated (like in the example above)\n * then it will end up producing a tree of objects representing the animation itself.\n *\n * When this animation object tree is processed by the visitor code below it will visit each of the\n * verb statements within the visitor. And during each visit it will build the context of the\n * animation keyframes by interacting with the `TimelineBuilder`.\n *\n * [TimelineBuilder]\n * This class is responsible for tracking the styles and building a series of keyframe objects for a\n * timeline between a start and end time. The builder starts off with an initial timeline and each\n * time the AST comes across a `group()`, `keyframes()` or a combination of the two within a\n * `sequence()` then it will generate a sub timeline for each step as well as a new one after\n * they are complete.\n *\n * As the AST is traversed, the timing state on each of the timelines will be incremented. If a sub\n * timeline was created (based on one of the cases above) then the parent timeline will attempt to\n * merge the styles used within the sub timelines into itself (only with group() this will happen).\n * This happens with a merge operation (much like how the merge works in mergeSort) and it will only\n * copy the most recently used styles from the sub timelines into the parent timeline. This ensures\n * that if the styles are used later on in another phase of the animation then they will be the most\n * up-to-date values.\n *\n * [How Missing Styles Are Updated]\n * Each timeline has a `backFill` property which is responsible for filling in new styles into\n * already processed keyframes if a new style shows up later within the animation sequence.\n *\n * ```\n * sequence([\n * style({ width: 0 }),\n * animate(1000, style({ width: 100 })),\n * animate(1000, style({ width: 200 })),\n * animate(1000, style({ width: 300 }))\n * animate(1000, style({ width: 400, height: 400 })) // notice how `height` doesn't exist anywhere\n * else\n * ])\n * ```\n *\n * What is happening here is that the `height` value is added later in the sequence, but is missing\n * from all previous animation steps. Therefore when a keyframe is created it would also be missing\n * from all previous keyframes up until where it is first used. For the timeline keyframe generation\n * to properly fill in the style it will place the previous value (the value from the parent\n * timeline) or a default value of `*` into the backFill map.\n *\n * When a sub-timeline is created it will have its own backFill property. This is done so that\n * styles present within the sub-timeline do not accidentally seep into the previous/future timeline\n * keyframes\n *\n * [Validation]\n * The code in this file is not responsible for validation. That functionality happens with within\n * the `AnimationValidatorVisitor` code.\n */\nfunction buildAnimationTimelines(driver, rootElement, ast, enterClassName, leaveClassName, startingStyles = new Map(), finalStyles = new Map(), options, subInstructions, errors = []) {\n return new AnimationTimelineBuilderVisitor().buildKeyframes(driver, rootElement, ast, enterClassName, leaveClassName, startingStyles, finalStyles, options, subInstructions, errors);\n}\nclass AnimationTimelineBuilderVisitor {\n buildKeyframes(driver, rootElement, ast, enterClassName, leaveClassName, startingStyles, finalStyles, options, subInstructions, errors = []) {\n subInstructions = subInstructions || new ElementInstructionMap();\n const context = new AnimationTimelineContext(driver, rootElement, subInstructions, enterClassName, leaveClassName, errors, []);\n context.options = options;\n const delay = options.delay ? resolveTimingValue(options.delay) : 0;\n context.currentTimeline.delayNextStep(delay);\n context.currentTimeline.setStyles([startingStyles], null, context.errors, options);\n visitDslNode(this, ast, context);\n // this checks to see if an actual animation happened\n const timelines = context.timelines.filter(timeline => timeline.containsAnimation());\n // note: we just want to apply the final styles for the rootElement, so we do not\n // just apply the styles to the last timeline but the last timeline which\n // element is the root one (basically `*`-styles are replaced with the actual\n // state style values only for the root element)\n if (timelines.length && finalStyles.size) {\n let lastRootTimeline;\n for (let i = timelines.length - 1; i >= 0; i--) {\n const timeline = timelines[i];\n if (timeline.element === rootElement) {\n lastRootTimeline = timeline;\n break;\n }\n }\n if (lastRootTimeline && !lastRootTimeline.allowOnlyTimelineStyles()) {\n lastRootTimeline.setStyles([finalStyles], null, context.errors, options);\n }\n }\n return timelines.length ? timelines.map(timeline => timeline.buildKeyframes()) : [createTimelineInstruction(rootElement, [], [], [], 0, delay, '', false)];\n }\n visitTrigger(ast, context) {\n // these values are not visited in this AST\n }\n visitState(ast, context) {\n // these values are not visited in this AST\n }\n visitTransition(ast, context) {\n // these values are not visited in this AST\n }\n visitAnimateChild(ast, context) {\n const elementInstructions = context.subInstructions.get(context.element);\n if (elementInstructions) {\n const innerContext = context.createSubContext(ast.options);\n const startTime = context.currentTimeline.currentTime;\n const endTime = this._visitSubInstructions(elementInstructions, innerContext, innerContext.options);\n if (startTime != endTime) {\n // we do this on the upper context because we created a sub context for\n // the sub child animations\n context.transformIntoNewTimeline(endTime);\n }\n }\n context.previousNode = ast;\n }\n visitAnimateRef(ast, context) {\n const innerContext = context.createSubContext(ast.options);\n innerContext.transformIntoNewTimeline();\n this._applyAnimationRefDelays([ast.options, ast.animation.options], context, innerContext);\n this.visitReference(ast.animation, innerContext);\n context.transformIntoNewTimeline(innerContext.currentTimeline.currentTime);\n context.previousNode = ast;\n }\n _applyAnimationRefDelays(animationsRefsOptions, context, innerContext) {\n for (const animationRefOptions of animationsRefsOptions) {\n const animationDelay = animationRefOptions?.delay;\n if (animationDelay) {\n const animationDelayValue = typeof animationDelay === 'number' ? animationDelay : resolveTimingValue(interpolateParams(animationDelay, animationRefOptions?.params ?? {}, context.errors));\n innerContext.delayNextStep(animationDelayValue);\n }\n }\n }\n _visitSubInstructions(instructions, context, options) {\n const startTime = context.currentTimeline.currentTime;\n let furthestTime = startTime;\n // this is a special-case for when a user wants to skip a sub\n // animation from being fired entirely.\n const duration = options.duration != null ? resolveTimingValue(options.duration) : null;\n const delay = options.delay != null ? resolveTimingValue(options.delay) : null;\n if (duration !== 0) {\n instructions.forEach(instruction => {\n const instructionTimings = context.appendInstructionToTimeline(instruction, duration, delay);\n furthestTime = Math.max(furthestTime, instructionTimings.duration + instructionTimings.delay);\n });\n }\n return furthestTime;\n }\n visitReference(ast, context) {\n context.updateOptions(ast.options, true);\n visitDslNode(this, ast.animation, context);\n context.previousNode = ast;\n }\n visitSequence(ast, context) {\n const subContextCount = context.subContextCount;\n let ctx = context;\n const options = ast.options;\n if (options && (options.params || options.delay)) {\n ctx = context.createSubContext(options);\n ctx.transformIntoNewTimeline();\n if (options.delay != null) {\n if (ctx.previousNode.type == AnimationMetadataType.Style) {\n ctx.currentTimeline.snapshotCurrentStyles();\n ctx.previousNode = DEFAULT_NOOP_PREVIOUS_NODE;\n }\n const delay = resolveTimingValue(options.delay);\n ctx.delayNextStep(delay);\n }\n }\n if (ast.steps.length) {\n ast.steps.forEach(s => visitDslNode(this, s, ctx));\n // this is here just in case the inner steps only contain or end with a style() call\n ctx.currentTimeline.applyStylesToKeyframe();\n // this means that some animation function within the sequence\n // ended up creating a sub timeline (which means the current\n // timeline cannot overlap with the contents of the sequence)\n if (ctx.subContextCount > subContextCount) {\n ctx.transformIntoNewTimeline();\n }\n }\n context.previousNode = ast;\n }\n visitGroup(ast, context) {\n const innerTimelines = [];\n let furthestTime = context.currentTimeline.currentTime;\n const delay = ast.options && ast.options.delay ? resolveTimingValue(ast.options.delay) : 0;\n ast.steps.forEach(s => {\n const innerContext = context.createSubContext(ast.options);\n if (delay) {\n innerContext.delayNextStep(delay);\n }\n visitDslNode(this, s, innerContext);\n furthestTime = Math.max(furthestTime, innerContext.currentTimeline.currentTime);\n innerTimelines.push(innerContext.currentTimeline);\n });\n // this operation is run after the AST loop because otherwise\n // if the parent timeline's collected styles were updated then\n // it would pass in invalid data into the new-to-be forked items\n innerTimelines.forEach(timeline => context.currentTimeline.mergeTimelineCollectedStyles(timeline));\n context.transformIntoNewTimeline(furthestTime);\n context.previousNode = ast;\n }\n _visitTiming(ast, context) {\n if (ast.dynamic) {\n const strValue = ast.strValue;\n const timingValue = context.params ? interpolateParams(strValue, context.params, context.errors) : strValue;\n return resolveTiming(timingValue, context.errors);\n } else {\n return {\n duration: ast.duration,\n delay: ast.delay,\n easing: ast.easing\n };\n }\n }\n visitAnimate(ast, context) {\n const timings = context.currentAnimateTimings = this._visitTiming(ast.timings, context);\n const timeline = context.currentTimeline;\n if (timings.delay) {\n context.incrementTime(timings.delay);\n timeline.snapshotCurrentStyles();\n }\n const style = ast.style;\n if (style.type == AnimationMetadataType.Keyframes) {\n this.visitKeyframes(style, context);\n } else {\n context.incrementTime(timings.duration);\n this.visitStyle(style, context);\n timeline.applyStylesToKeyframe();\n }\n context.currentAnimateTimings = null;\n context.previousNode = ast;\n }\n visitStyle(ast, context) {\n const timeline = context.currentTimeline;\n const timings = context.currentAnimateTimings;\n // this is a special case for when a style() call\n // directly follows an animate() call (but not inside of an animate() call)\n if (!timings && timeline.hasCurrentStyleProperties()) {\n timeline.forwardFrame();\n }\n const easing = timings && timings.easing || ast.easing;\n if (ast.isEmptyStep) {\n timeline.applyEmptyStep(easing);\n } else {\n timeline.setStyles(ast.styles, easing, context.errors, context.options);\n }\n context.previousNode = ast;\n }\n visitKeyframes(ast, context) {\n const currentAnimateTimings = context.currentAnimateTimings;\n const startTime = context.currentTimeline.duration;\n const duration = currentAnimateTimings.duration;\n const innerContext = context.createSubContext();\n const innerTimeline = innerContext.currentTimeline;\n innerTimeline.easing = currentAnimateTimings.easing;\n ast.styles.forEach(step => {\n const offset = step.offset || 0;\n innerTimeline.forwardTime(offset * duration);\n innerTimeline.setStyles(step.styles, step.easing, context.errors, context.options);\n innerTimeline.applyStylesToKeyframe();\n });\n // this will ensure that the parent timeline gets all the styles from\n // the child even if the new timeline below is not used\n context.currentTimeline.mergeTimelineCollectedStyles(innerTimeline);\n // we do this because the window between this timeline and the sub timeline\n // should ensure that the styles within are exactly the same as they were before\n context.transformIntoNewTimeline(startTime + duration);\n context.previousNode = ast;\n }\n visitQuery(ast, context) {\n // in the event that the first step before this is a style step we need\n // to ensure the styles are applied before the children are animated\n const startTime = context.currentTimeline.currentTime;\n const options = ast.options || {};\n const delay = options.delay ? resolveTimingValue(options.delay) : 0;\n if (delay && (context.previousNode.type === AnimationMetadataType.Style || startTime == 0 && context.currentTimeline.hasCurrentStyleProperties())) {\n context.currentTimeline.snapshotCurrentStyles();\n context.previousNode = DEFAULT_NOOP_PREVIOUS_NODE;\n }\n let furthestTime = startTime;\n const elms = context.invokeQuery(ast.selector, ast.originalSelector, ast.limit, ast.includeSelf, options.optional ? true : false, context.errors);\n context.currentQueryTotal = elms.length;\n let sameElementTimeline = null;\n elms.forEach((element, i) => {\n context.currentQueryIndex = i;\n const innerContext = context.createSubContext(ast.options, element);\n if (delay) {\n innerContext.delayNextStep(delay);\n }\n if (element === context.element) {\n sameElementTimeline = innerContext.currentTimeline;\n }\n visitDslNode(this, ast.animation, innerContext);\n // this is here just incase the inner steps only contain or end\n // with a style() call (which is here to signal that this is a preparatory\n // call to style an element before it is animated again)\n innerContext.currentTimeline.applyStylesToKeyframe();\n const endTime = innerContext.currentTimeline.currentTime;\n furthestTime = Math.max(furthestTime, endTime);\n });\n context.currentQueryIndex = 0;\n context.currentQueryTotal = 0;\n context.transformIntoNewTimeline(furthestTime);\n if (sameElementTimeline) {\n context.currentTimeline.mergeTimelineCollectedStyles(sameElementTimeline);\n context.currentTimeline.snapshotCurrentStyles();\n }\n context.previousNode = ast;\n }\n visitStagger(ast, context) {\n const parentContext = context.parentContext;\n const tl = context.currentTimeline;\n const timings = ast.timings;\n const duration = Math.abs(timings.duration);\n const maxTime = duration * (context.currentQueryTotal - 1);\n let delay = duration * context.currentQueryIndex;\n let staggerTransformer = timings.duration < 0 ? 'reverse' : timings.easing;\n switch (staggerTransformer) {\n case 'reverse':\n delay = maxTime - delay;\n break;\n case 'full':\n delay = parentContext.currentStaggerTime;\n break;\n }\n const timeline = context.currentTimeline;\n if (delay) {\n timeline.delayNextStep(delay);\n }\n const startingTime = timeline.currentTime;\n visitDslNode(this, ast.animation, context);\n context.previousNode = ast;\n // time = duration + delay\n // the reason why this computation is so complex is because\n // the inner timeline may either have a delay value or a stretched\n // keyframe depending on if a subtimeline is not used or is used.\n parentContext.currentStaggerTime = tl.currentTime - startingTime + (tl.startTime - parentContext.currentTimeline.startTime);\n }\n}\nconst DEFAULT_NOOP_PREVIOUS_NODE = {};\nclass AnimationTimelineContext {\n constructor(_driver, element, subInstructions, _enterClassName, _leaveClassName, errors, timelines, initialTimeline) {\n this._driver = _driver;\n this.element = element;\n this.subInstructions = subInstructions;\n this._enterClassName = _enterClassName;\n this._leaveClassName = _leaveClassName;\n this.errors = errors;\n this.timelines = timelines;\n this.parentContext = null;\n this.currentAnimateTimings = null;\n this.previousNode = DEFAULT_NOOP_PREVIOUS_NODE;\n this.subContextCount = 0;\n this.options = {};\n this.currentQueryIndex = 0;\n this.currentQueryTotal = 0;\n this.currentStaggerTime = 0;\n this.currentTimeline = initialTimeline || new TimelineBuilder(this._driver, element, 0);\n timelines.push(this.currentTimeline);\n }\n get params() {\n return this.options.params;\n }\n updateOptions(options, skipIfExists) {\n if (!options) return;\n const newOptions = options;\n let optionsToUpdate = this.options;\n // NOTE: this will get patched up when other animation methods support duration overrides\n if (newOptions.duration != null) {\n optionsToUpdate.duration = resolveTimingValue(newOptions.duration);\n }\n if (newOptions.delay != null) {\n optionsToUpdate.delay = resolveTimingValue(newOptions.delay);\n }\n const newParams = newOptions.params;\n if (newParams) {\n let paramsToUpdate = optionsToUpdate.params;\n if (!paramsToUpdate) {\n paramsToUpdate = this.options.params = {};\n }\n Object.keys(newParams).forEach(name => {\n if (!skipIfExists || !paramsToUpdate.hasOwnProperty(name)) {\n paramsToUpdate[name] = interpolateParams(newParams[name], paramsToUpdate, this.errors);\n }\n });\n }\n }\n _copyOptions() {\n const options = {};\n if (this.options) {\n const oldParams = this.options.params;\n if (oldParams) {\n const params = options['params'] = {};\n Object.keys(oldParams).forEach(name => {\n params[name] = oldParams[name];\n });\n }\n }\n return options;\n }\n createSubContext(options = null, element, newTime) {\n const target = element || this.element;\n const context = new AnimationTimelineContext(this._driver, target, this.subInstructions, this._enterClassName, this._leaveClassName, this.errors, this.timelines, this.currentTimeline.fork(target, newTime || 0));\n context.previousNode = this.previousNode;\n context.currentAnimateTimings = this.currentAnimateTimings;\n context.options = this._copyOptions();\n context.updateOptions(options);\n context.currentQueryIndex = this.currentQueryIndex;\n context.currentQueryTotal = this.currentQueryTotal;\n context.parentContext = this;\n this.subContextCount++;\n return context;\n }\n transformIntoNewTimeline(newTime) {\n this.previousNode = DEFAULT_NOOP_PREVIOUS_NODE;\n this.currentTimeline = this.currentTimeline.fork(this.element, newTime);\n this.timelines.push(this.currentTimeline);\n return this.currentTimeline;\n }\n appendInstructionToTimeline(instruction, duration, delay) {\n const updatedTimings = {\n duration: duration != null ? duration : instruction.duration,\n delay: this.currentTimeline.currentTime + (delay != null ? delay : 0) + instruction.delay,\n easing: ''\n };\n const builder = new SubTimelineBuilder(this._driver, instruction.element, instruction.keyframes, instruction.preStyleProps, instruction.postStyleProps, updatedTimings, instruction.stretchStartingKeyframe);\n this.timelines.push(builder);\n return updatedTimings;\n }\n incrementTime(time) {\n this.currentTimeline.forwardTime(this.currentTimeline.duration + time);\n }\n delayNextStep(delay) {\n // negative delays are not yet supported\n if (delay > 0) {\n this.currentTimeline.delayNextStep(delay);\n }\n }\n invokeQuery(selector, originalSelector, limit, includeSelf, optional, errors) {\n let results = [];\n if (includeSelf) {\n results.push(this.element);\n }\n if (selector.length > 0) {\n // only if :self is used then the selector can be empty\n selector = selector.replace(ENTER_TOKEN_REGEX, '.' + this._enterClassName);\n selector = selector.replace(LEAVE_TOKEN_REGEX, '.' + this._leaveClassName);\n const multi = limit != 1;\n let elements = this._driver.query(this.element, selector, multi);\n if (limit !== 0) {\n elements = limit < 0 ? elements.slice(elements.length + limit, elements.length) : elements.slice(0, limit);\n }\n results.push(...elements);\n }\n if (!optional && results.length == 0) {\n errors.push(invalidQuery(originalSelector));\n }\n return results;\n }\n}\nclass TimelineBuilder {\n constructor(_driver, element, startTime, _elementTimelineStylesLookup) {\n this._driver = _driver;\n this.element = element;\n this.startTime = startTime;\n this._elementTimelineStylesLookup = _elementTimelineStylesLookup;\n this.duration = 0;\n this.easing = null;\n this._previousKeyframe = new Map();\n this._currentKeyframe = new Map();\n this._keyframes = new Map();\n this._styleSummary = new Map();\n this._localTimelineStyles = new Map();\n this._pendingStyles = new Map();\n this._backFill = new Map();\n this._currentEmptyStepKeyframe = null;\n if (!this._elementTimelineStylesLookup) {\n this._elementTimelineStylesLookup = new Map();\n }\n this._globalTimelineStyles = this._elementTimelineStylesLookup.get(element);\n if (!this._globalTimelineStyles) {\n this._globalTimelineStyles = this._localTimelineStyles;\n this._elementTimelineStylesLookup.set(element, this._localTimelineStyles);\n }\n this._loadKeyframe();\n }\n containsAnimation() {\n switch (this._keyframes.size) {\n case 0:\n return false;\n case 1:\n return this.hasCurrentStyleProperties();\n default:\n return true;\n }\n }\n hasCurrentStyleProperties() {\n return this._currentKeyframe.size > 0;\n }\n get currentTime() {\n return this.startTime + this.duration;\n }\n delayNextStep(delay) {\n // in the event that a style() step is placed right before a stagger()\n // and that style() step is the very first style() value in the animation\n // then we need to make a copy of the keyframe [0, copy, 1] so that the delay\n // properly applies the style() values to work with the stagger...\n const hasPreStyleStep = this._keyframes.size === 1 && this._pendingStyles.size;\n if (this.duration || hasPreStyleStep) {\n this.forwardTime(this.currentTime + delay);\n if (hasPreStyleStep) {\n this.snapshotCurrentStyles();\n }\n } else {\n this.startTime += delay;\n }\n }\n fork(element, currentTime) {\n this.applyStylesToKeyframe();\n return new TimelineBuilder(this._driver, element, currentTime || this.currentTime, this._elementTimelineStylesLookup);\n }\n _loadKeyframe() {\n if (this._currentKeyframe) {\n this._previousKeyframe = this._currentKeyframe;\n }\n this._currentKeyframe = this._keyframes.get(this.duration);\n if (!this._currentKeyframe) {\n this._currentKeyframe = new Map();\n this._keyframes.set(this.duration, this._currentKeyframe);\n }\n }\n forwardFrame() {\n this.duration += ONE_FRAME_IN_MILLISECONDS;\n this._loadKeyframe();\n }\n forwardTime(time) {\n this.applyStylesToKeyframe();\n this.duration = time;\n this._loadKeyframe();\n }\n _updateStyle(prop, value) {\n this._localTimelineStyles.set(prop, value);\n this._globalTimelineStyles.set(prop, value);\n this._styleSummary.set(prop, {\n time: this.currentTime,\n value\n });\n }\n allowOnlyTimelineStyles() {\n return this._currentEmptyStepKeyframe !== this._currentKeyframe;\n }\n applyEmptyStep(easing) {\n if (easing) {\n this._previousKeyframe.set('easing', easing);\n }\n // special case for animate(duration):\n // all missing styles are filled with a `*` value then\n // if any destination styles are filled in later on the same\n // keyframe then they will override the overridden styles\n // We use `_globalTimelineStyles` here because there may be\n // styles in previous keyframes that are not present in this timeline\n for (let [prop, value] of this._globalTimelineStyles) {\n this._backFill.set(prop, value || AUTO_STYLE);\n this._currentKeyframe.set(prop, AUTO_STYLE);\n }\n this._currentEmptyStepKeyframe = this._currentKeyframe;\n }\n setStyles(input, easing, errors, options) {\n if (easing) {\n this._previousKeyframe.set('easing', easing);\n }\n const params = options && options.params || {};\n const styles = flattenStyles(input, this._globalTimelineStyles);\n for (let [prop, value] of styles) {\n const val = interpolateParams(value, params, errors);\n this._pendingStyles.set(prop, val);\n if (!this._localTimelineStyles.has(prop)) {\n this._backFill.set(prop, this._globalTimelineStyles.get(prop) ?? AUTO_STYLE);\n }\n this._updateStyle(prop, val);\n }\n }\n applyStylesToKeyframe() {\n if (this._pendingStyles.size == 0) return;\n this._pendingStyles.forEach((val, prop) => {\n this._currentKeyframe.set(prop, val);\n });\n this._pendingStyles.clear();\n this._localTimelineStyles.forEach((val, prop) => {\n if (!this._currentKeyframe.has(prop)) {\n this._currentKeyframe.set(prop, val);\n }\n });\n }\n snapshotCurrentStyles() {\n for (let [prop, val] of this._localTimelineStyles) {\n this._pendingStyles.set(prop, val);\n this._updateStyle(prop, val);\n }\n }\n getFinalKeyframe() {\n return this._keyframes.get(this.duration);\n }\n get properties() {\n const properties = [];\n for (let prop in this._currentKeyframe) {\n properties.push(prop);\n }\n return properties;\n }\n mergeTimelineCollectedStyles(timeline) {\n timeline._styleSummary.forEach((details1, prop) => {\n const details0 = this._styleSummary.get(prop);\n if (!details0 || details1.time > details0.time) {\n this._updateStyle(prop, details1.value);\n }\n });\n }\n buildKeyframes() {\n this.applyStylesToKeyframe();\n const preStyleProps = new Set();\n const postStyleProps = new Set();\n const isEmpty = this._keyframes.size === 1 && this.duration === 0;\n let finalKeyframes = [];\n this._keyframes.forEach((keyframe, time) => {\n const finalKeyframe = new Map([...this._backFill, ...keyframe]);\n finalKeyframe.forEach((value, prop) => {\n if (value === ɵPRE_STYLE) {\n preStyleProps.add(prop);\n } else if (value === AUTO_STYLE) {\n postStyleProps.add(prop);\n }\n });\n if (!isEmpty) {\n finalKeyframe.set('offset', time / this.duration);\n }\n finalKeyframes.push(finalKeyframe);\n });\n const preProps = [...preStyleProps.values()];\n const postProps = [...postStyleProps.values()];\n // special case for a 0-second animation (which is designed just to place styles onscreen)\n if (isEmpty) {\n const kf0 = finalKeyframes[0];\n const kf1 = new Map(kf0);\n kf0.set('offset', 0);\n kf1.set('offset', 1);\n finalKeyframes = [kf0, kf1];\n }\n return createTimelineInstruction(this.element, finalKeyframes, preProps, postProps, this.duration, this.startTime, this.easing, false);\n }\n}\nclass SubTimelineBuilder extends TimelineBuilder {\n constructor(driver, element, keyframes, preStyleProps, postStyleProps, timings, _stretchStartingKeyframe = false) {\n super(driver, element, timings.delay);\n this.keyframes = keyframes;\n this.preStyleProps = preStyleProps;\n this.postStyleProps = postStyleProps;\n this._stretchStartingKeyframe = _stretchStartingKeyframe;\n this.timings = {\n duration: timings.duration,\n delay: timings.delay,\n easing: timings.easing\n };\n }\n containsAnimation() {\n return this.keyframes.length > 1;\n }\n buildKeyframes() {\n let keyframes = this.keyframes;\n let {\n delay,\n duration,\n easing\n } = this.timings;\n if (this._stretchStartingKeyframe && delay) {\n const newKeyframes = [];\n const totalTime = duration + delay;\n const startingGap = delay / totalTime;\n // the original starting keyframe now starts once the delay is done\n const newFirstKeyframe = new Map(keyframes[0]);\n newFirstKeyframe.set('offset', 0);\n newKeyframes.push(newFirstKeyframe);\n const oldFirstKeyframe = new Map(keyframes[0]);\n oldFirstKeyframe.set('offset', roundOffset(startingGap));\n newKeyframes.push(oldFirstKeyframe);\n /*\n When the keyframe is stretched then it means that the delay before the animation\n starts is gone. Instead the first keyframe is placed at the start of the animation\n and it is then copied to where it starts when the original delay is over. This basically\n means nothing animates during that delay, but the styles are still rendered. For this\n to work the original offset values that exist in the original keyframes must be \"warped\"\n so that they can take the new keyframe + delay into account.\n delay=1000, duration=1000, keyframes = 0 .5 1\n turns into\n delay=0, duration=2000, keyframes = 0 .33 .66 1\n */\n // offsets between 1 ... n -1 are all warped by the keyframe stretch\n const limit = keyframes.length - 1;\n for (let i = 1; i <= limit; i++) {\n let kf = new Map(keyframes[i]);\n const oldOffset = kf.get('offset');\n const timeAtKeyframe = delay + oldOffset * duration;\n kf.set('offset', roundOffset(timeAtKeyframe / totalTime));\n newKeyframes.push(kf);\n }\n // the new starting keyframe should be added at the start\n duration = totalTime;\n delay = 0;\n easing = '';\n keyframes = newKeyframes;\n }\n return createTimelineInstruction(this.element, keyframes, this.preStyleProps, this.postStyleProps, duration, delay, easing, true);\n }\n}\nfunction roundOffset(offset, decimalPoints = 3) {\n const mult = Math.pow(10, decimalPoints - 1);\n return Math.round(offset * mult) / mult;\n}\nfunction flattenStyles(input, allStyles) {\n const styles = new Map();\n let allProperties;\n input.forEach(token => {\n if (token === '*') {\n allProperties ??= allStyles.keys();\n for (let prop of allProperties) {\n styles.set(prop, AUTO_STYLE);\n }\n } else {\n for (let [prop, val] of token) {\n styles.set(prop, val);\n }\n }\n });\n return styles;\n}\nfunction createTransitionInstruction(element, triggerName, fromState, toState, isRemovalTransition, fromStyles, toStyles, timelines, queriedElements, preStyleProps, postStyleProps, totalTime, errors) {\n return {\n type: 0 /* AnimationTransitionInstructionType.TransitionAnimation */,\n element,\n triggerName,\n isRemovalTransition,\n fromState,\n fromStyles,\n toState,\n toStyles,\n timelines,\n queriedElements,\n preStyleProps,\n postStyleProps,\n totalTime,\n errors\n };\n}\nconst EMPTY_OBJECT = {};\nclass AnimationTransitionFactory {\n constructor(_triggerName, ast, _stateStyles) {\n this._triggerName = _triggerName;\n this.ast = ast;\n this._stateStyles = _stateStyles;\n }\n match(currentState, nextState, element, params) {\n return oneOrMoreTransitionsMatch(this.ast.matchers, currentState, nextState, element, params);\n }\n buildStyles(stateName, params, errors) {\n let styler = this._stateStyles.get('*');\n if (stateName !== undefined) {\n styler = this._stateStyles.get(stateName?.toString()) || styler;\n }\n return styler ? styler.buildStyles(params, errors) : new Map();\n }\n build(driver, element, currentState, nextState, enterClassName, leaveClassName, currentOptions, nextOptions, subInstructions, skipAstBuild) {\n const errors = [];\n const transitionAnimationParams = this.ast.options && this.ast.options.params || EMPTY_OBJECT;\n const currentAnimationParams = currentOptions && currentOptions.params || EMPTY_OBJECT;\n const currentStateStyles = this.buildStyles(currentState, currentAnimationParams, errors);\n const nextAnimationParams = nextOptions && nextOptions.params || EMPTY_OBJECT;\n const nextStateStyles = this.buildStyles(nextState, nextAnimationParams, errors);\n const queriedElements = new Set();\n const preStyleMap = new Map();\n const postStyleMap = new Map();\n const isRemoval = nextState === 'void';\n const animationOptions = {\n params: applyParamDefaults(nextAnimationParams, transitionAnimationParams),\n delay: this.ast.options?.delay\n };\n const timelines = skipAstBuild ? [] : buildAnimationTimelines(driver, element, this.ast.animation, enterClassName, leaveClassName, currentStateStyles, nextStateStyles, animationOptions, subInstructions, errors);\n let totalTime = 0;\n timelines.forEach(tl => {\n totalTime = Math.max(tl.duration + tl.delay, totalTime);\n });\n if (errors.length) {\n return createTransitionInstruction(element, this._triggerName, currentState, nextState, isRemoval, currentStateStyles, nextStateStyles, [], [], preStyleMap, postStyleMap, totalTime, errors);\n }\n timelines.forEach(tl => {\n const elm = tl.element;\n const preProps = getOrSetDefaultValue(preStyleMap, elm, new Set());\n tl.preStyleProps.forEach(prop => preProps.add(prop));\n const postProps = getOrSetDefaultValue(postStyleMap, elm, new Set());\n tl.postStyleProps.forEach(prop => postProps.add(prop));\n if (elm !== element) {\n queriedElements.add(elm);\n }\n });\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n checkNonAnimatableInTimelines(timelines, this._triggerName, driver);\n }\n return createTransitionInstruction(element, this._triggerName, currentState, nextState, isRemoval, currentStateStyles, nextStateStyles, timelines, [...queriedElements.values()], preStyleMap, postStyleMap, totalTime);\n }\n}\n/**\n * Checks inside a set of timelines if they try to animate a css property which is not considered\n * animatable, in that case it prints a warning on the console.\n * Besides that the function doesn't have any other effect.\n *\n * Note: this check is done here after the timelines are built instead of doing on a lower level so\n * that we can make sure that the warning appears only once per instruction (we can aggregate here\n * all the issues instead of finding them separately).\n *\n * @param timelines The built timelines for the current instruction.\n * @param triggerName The name of the trigger for the current instruction.\n * @param driver Animation driver used to perform the check.\n *\n */\nfunction checkNonAnimatableInTimelines(timelines, triggerName, driver) {\n if (!driver.validateAnimatableStyleProperty) {\n return;\n }\n const allowedNonAnimatableProps = new Set([\n // 'easing' is a utility/synthetic prop we use to represent\n // easing functions, it represents a property of the animation\n // which is not animatable but different values can be used\n // in different steps\n 'easing']);\n const invalidNonAnimatableProps = new Set();\n timelines.forEach(({\n keyframes\n }) => {\n const nonAnimatablePropsInitialValues = new Map();\n keyframes.forEach(keyframe => {\n const entriesToCheck = Array.from(keyframe.entries()).filter(([prop]) => !allowedNonAnimatableProps.has(prop));\n for (const [prop, value] of entriesToCheck) {\n if (!driver.validateAnimatableStyleProperty(prop)) {\n if (nonAnimatablePropsInitialValues.has(prop) && !invalidNonAnimatableProps.has(prop)) {\n const propInitialValue = nonAnimatablePropsInitialValues.get(prop);\n if (propInitialValue !== value) {\n invalidNonAnimatableProps.add(prop);\n }\n } else {\n nonAnimatablePropsInitialValues.set(prop, value);\n }\n }\n }\n });\n });\n if (invalidNonAnimatableProps.size > 0) {\n console.warn(`Warning: The animation trigger \"${triggerName}\" is attempting to animate the following` + ' not animatable properties: ' + Array.from(invalidNonAnimatableProps).join(', ') + '\\n' + '(to check the list of all animatable properties visit https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_animated_properties)');\n }\n}\nfunction oneOrMoreTransitionsMatch(matchFns, currentState, nextState, element, params) {\n return matchFns.some(fn => fn(currentState, nextState, element, params));\n}\nfunction applyParamDefaults(userParams, defaults) {\n const result = {\n ...defaults\n };\n Object.entries(userParams).forEach(([key, value]) => {\n if (value != null) {\n result[key] = value;\n }\n });\n return result;\n}\nclass AnimationStateStyles {\n constructor(styles, defaultParams, normalizer) {\n this.styles = styles;\n this.defaultParams = defaultParams;\n this.normalizer = normalizer;\n }\n buildStyles(params, errors) {\n const finalStyles = new Map();\n const combinedParams = applyParamDefaults(params, this.defaultParams);\n this.styles.styles.forEach(value => {\n if (typeof value !== 'string') {\n value.forEach((val, prop) => {\n if (val) {\n val = interpolateParams(val, combinedParams, errors);\n }\n const normalizedProp = this.normalizer.normalizePropertyName(prop, errors);\n val = this.normalizer.normalizeStyleValue(prop, normalizedProp, val, errors);\n finalStyles.set(prop, val);\n });\n }\n });\n return finalStyles;\n }\n}\nfunction buildTrigger(name, ast, normalizer) {\n return new AnimationTrigger(name, ast, normalizer);\n}\nclass AnimationTrigger {\n constructor(name, ast, _normalizer) {\n this.name = name;\n this.ast = ast;\n this._normalizer = _normalizer;\n this.transitionFactories = [];\n this.states = new Map();\n ast.states.forEach(ast => {\n const defaultParams = ast.options && ast.options.params || {};\n this.states.set(ast.name, new AnimationStateStyles(ast.style, defaultParams, _normalizer));\n });\n balanceProperties(this.states, 'true', '1');\n balanceProperties(this.states, 'false', '0');\n ast.transitions.forEach(ast => {\n this.transitionFactories.push(new AnimationTransitionFactory(name, ast, this.states));\n });\n this.fallbackTransition = createFallbackTransition(name, this.states, this._normalizer);\n }\n get containsQueries() {\n return this.ast.queryCount > 0;\n }\n matchTransition(currentState, nextState, element, params) {\n const entry = this.transitionFactories.find(f => f.match(currentState, nextState, element, params));\n return entry || null;\n }\n matchStyles(currentState, params, errors) {\n return this.fallbackTransition.buildStyles(currentState, params, errors);\n }\n}\nfunction createFallbackTransition(triggerName, states, normalizer) {\n const matchers = [(fromState, toState) => true];\n const animation = {\n type: AnimationMetadataType.Sequence,\n steps: [],\n options: null\n };\n const transition = {\n type: AnimationMetadataType.Transition,\n animation,\n matchers,\n options: null,\n queryCount: 0,\n depCount: 0\n };\n return new AnimationTransitionFactory(triggerName, transition, states);\n}\nfunction balanceProperties(stateMap, key1, key2) {\n if (stateMap.has(key1)) {\n if (!stateMap.has(key2)) {\n stateMap.set(key2, stateMap.get(key1));\n }\n } else if (stateMap.has(key2)) {\n stateMap.set(key1, stateMap.get(key2));\n }\n}\nconst EMPTY_INSTRUCTION_MAP = new ElementInstructionMap();\nclass TimelineAnimationEngine {\n constructor(bodyNode, _driver, _normalizer) {\n this.bodyNode = bodyNode;\n this._driver = _driver;\n this._normalizer = _normalizer;\n this._animations = new Map();\n this._playersById = new Map();\n this.players = [];\n }\n register(id, metadata) {\n const errors = [];\n const warnings = [];\n const ast = buildAnimationAst(this._driver, metadata, errors, warnings);\n if (errors.length) {\n throw registerFailed(errors);\n } else {\n if (warnings.length) {\n warnRegister(warnings);\n }\n this._animations.set(id, ast);\n }\n }\n _buildPlayer(i, preStyles, postStyles) {\n const element = i.element;\n const keyframes = normalizeKeyframes$1(this._normalizer, i.keyframes, preStyles, postStyles);\n return this._driver.animate(element, keyframes, i.duration, i.delay, i.easing, [], true);\n }\n create(id, element, options = {}) {\n const errors = [];\n const ast = this._animations.get(id);\n let instructions;\n const autoStylesMap = new Map();\n if (ast) {\n instructions = buildAnimationTimelines(this._driver, element, ast, ENTER_CLASSNAME, LEAVE_CLASSNAME, new Map(), new Map(), options, EMPTY_INSTRUCTION_MAP, errors);\n instructions.forEach(inst => {\n const styles = getOrSetDefaultValue(autoStylesMap, inst.element, new Map());\n inst.postStyleProps.forEach(prop => styles.set(prop, null));\n });\n } else {\n errors.push(missingOrDestroyedAnimation());\n instructions = [];\n }\n if (errors.length) {\n throw createAnimationFailed(errors);\n }\n autoStylesMap.forEach((styles, element) => {\n styles.forEach((_, prop) => {\n styles.set(prop, this._driver.computeStyle(element, prop, AUTO_STYLE));\n });\n });\n const players = instructions.map(i => {\n const styles = autoStylesMap.get(i.element);\n return this._buildPlayer(i, new Map(), styles);\n });\n const player = optimizeGroupPlayer(players);\n this._playersById.set(id, player);\n player.onDestroy(() => this.destroy(id));\n this.players.push(player);\n return player;\n }\n destroy(id) {\n const player = this._getPlayer(id);\n player.destroy();\n this._playersById.delete(id);\n const index = this.players.indexOf(player);\n if (index >= 0) {\n this.players.splice(index, 1);\n }\n }\n _getPlayer(id) {\n const player = this._playersById.get(id);\n if (!player) {\n throw missingPlayer(id);\n }\n return player;\n }\n listen(id, element, eventName, callback) {\n // triggerName, fromState, toState are all ignored for timeline animations\n const baseEvent = makeAnimationEvent(element, '', '', '');\n listenOnPlayer(this._getPlayer(id), eventName, baseEvent, callback);\n return () => {};\n }\n command(id, element, command, args) {\n if (command == 'register') {\n this.register(id, args[0]);\n return;\n }\n if (command == 'create') {\n const options = args[0] || {};\n this.create(id, element, options);\n return;\n }\n const player = this._getPlayer(id);\n switch (command) {\n case 'play':\n player.play();\n break;\n case 'pause':\n player.pause();\n break;\n case 'reset':\n player.reset();\n break;\n case 'restart':\n player.restart();\n break;\n case 'finish':\n player.finish();\n break;\n case 'init':\n player.init();\n break;\n case 'setPosition':\n player.setPosition(parseFloat(args[0]));\n break;\n case 'destroy':\n this.destroy(id);\n break;\n }\n }\n}\nconst QUEUED_CLASSNAME = 'ng-animate-queued';\nconst QUEUED_SELECTOR = '.ng-animate-queued';\nconst DISABLED_CLASSNAME = 'ng-animate-disabled';\nconst DISABLED_SELECTOR = '.ng-animate-disabled';\nconst STAR_CLASSNAME = 'ng-star-inserted';\nconst STAR_SELECTOR = '.ng-star-inserted';\nconst EMPTY_PLAYER_ARRAY = [];\nconst NULL_REMOVAL_STATE = {\n namespaceId: '',\n setForRemoval: false,\n setForMove: false,\n hasAnimation: false,\n removedBeforeQueried: false\n};\nconst NULL_REMOVED_QUERIED_STATE = {\n namespaceId: '',\n setForMove: false,\n setForRemoval: false,\n hasAnimation: false,\n removedBeforeQueried: true\n};\nconst REMOVAL_FLAG = '__ng_removed';\nclass StateValue {\n get params() {\n return this.options.params;\n }\n constructor(input, namespaceId = '') {\n this.namespaceId = namespaceId;\n const isObj = input && input.hasOwnProperty('value');\n const value = isObj ? input['value'] : input;\n this.value = normalizeTriggerValue(value);\n if (isObj) {\n // we drop the value property from options.\n const {\n value,\n ...options\n } = input;\n this.options = options;\n } else {\n this.options = {};\n }\n if (!this.options.params) {\n this.options.params = {};\n }\n }\n absorbOptions(options) {\n const newParams = options.params;\n if (newParams) {\n const oldParams = this.options.params;\n Object.keys(newParams).forEach(prop => {\n if (oldParams[prop] == null) {\n oldParams[prop] = newParams[prop];\n }\n });\n }\n }\n}\nconst VOID_VALUE = 'void';\nconst DEFAULT_STATE_VALUE = new StateValue(VOID_VALUE);\nclass AnimationTransitionNamespace {\n constructor(id, hostElement, _engine) {\n this.id = id;\n this.hostElement = hostElement;\n this._engine = _engine;\n this.players = [];\n this._triggers = new Map();\n this._queue = [];\n this._elementListeners = new Map();\n this._hostClassName = 'ng-tns-' + id;\n addClass(hostElement, this._hostClassName);\n }\n listen(element, name, phase, callback) {\n if (!this._triggers.has(name)) {\n throw missingTrigger(phase, name);\n }\n if (phase == null || phase.length == 0) {\n throw missingEvent(name);\n }\n if (!isTriggerEventValid(phase)) {\n throw unsupportedTriggerEvent(phase, name);\n }\n const listeners = getOrSetDefaultValue(this._elementListeners, element, []);\n const data = {\n name,\n phase,\n callback\n };\n listeners.push(data);\n const triggersWithStates = getOrSetDefaultValue(this._engine.statesByElement, element, new Map());\n if (!triggersWithStates.has(name)) {\n addClass(element, NG_TRIGGER_CLASSNAME);\n addClass(element, NG_TRIGGER_CLASSNAME + '-' + name);\n triggersWithStates.set(name, DEFAULT_STATE_VALUE);\n }\n return () => {\n // the event listener is removed AFTER the flush has occurred such\n // that leave animations callbacks can fire (otherwise if the node\n // is removed in between then the listeners would be deregistered)\n this._engine.afterFlush(() => {\n const index = listeners.indexOf(data);\n if (index >= 0) {\n listeners.splice(index, 1);\n }\n if (!this._triggers.has(name)) {\n triggersWithStates.delete(name);\n }\n });\n };\n }\n register(name, ast) {\n if (this._triggers.has(name)) {\n // throw\n return false;\n } else {\n this._triggers.set(name, ast);\n return true;\n }\n }\n _getTrigger(name) {\n const trigger = this._triggers.get(name);\n if (!trigger) {\n throw unregisteredTrigger(name);\n }\n return trigger;\n }\n trigger(element, triggerName, value, defaultToFallback = true) {\n const trigger = this._getTrigger(triggerName);\n const player = new TransitionAnimationPlayer(this.id, triggerName, element);\n let triggersWithStates = this._engine.statesByElement.get(element);\n if (!triggersWithStates) {\n addClass(element, NG_TRIGGER_CLASSNAME);\n addClass(element, NG_TRIGGER_CLASSNAME + '-' + triggerName);\n this._engine.statesByElement.set(element, triggersWithStates = new Map());\n }\n let fromState = triggersWithStates.get(triggerName);\n const toState = new StateValue(value, this.id);\n const isObj = value && value.hasOwnProperty('value');\n if (!isObj && fromState) {\n toState.absorbOptions(fromState.options);\n }\n triggersWithStates.set(triggerName, toState);\n if (!fromState) {\n fromState = DEFAULT_STATE_VALUE;\n }\n const isRemoval = toState.value === VOID_VALUE;\n // normally this isn't reached by here, however, if an object expression\n // is passed in then it may be a new object each time. Comparing the value\n // is important since that will stay the same despite there being a new object.\n // The removal arc here is special cased because the same element is triggered\n // twice in the event that it contains animations on the outer/inner portions\n // of the host container\n if (!isRemoval && fromState.value === toState.value) {\n // this means that despite the value not changing, some inner params\n // have changed which means that the animation final styles need to be applied\n if (!objEquals(fromState.params, toState.params)) {\n const errors = [];\n const fromStyles = trigger.matchStyles(fromState.value, fromState.params, errors);\n const toStyles = trigger.matchStyles(toState.value, toState.params, errors);\n if (errors.length) {\n this._engine.reportError(errors);\n } else {\n this._engine.afterFlush(() => {\n eraseStyles(element, fromStyles);\n setStyles(element, toStyles);\n });\n }\n }\n return;\n }\n const playersOnElement = getOrSetDefaultValue(this._engine.playersByElement, element, []);\n playersOnElement.forEach(player => {\n // only remove the player if it is queued on the EXACT same trigger/namespace\n // we only also deal with queued players here because if the animation has\n // started then we want to keep the player alive until the flush happens\n // (which is where the previousPlayers are passed into the new player)\n if (player.namespaceId == this.id && player.triggerName == triggerName && player.queued) {\n player.destroy();\n }\n });\n let transition = trigger.matchTransition(fromState.value, toState.value, element, toState.params);\n let isFallbackTransition = false;\n if (!transition) {\n if (!defaultToFallback) return;\n transition = trigger.fallbackTransition;\n isFallbackTransition = true;\n }\n this._engine.totalQueuedPlayers++;\n this._queue.push({\n element,\n triggerName,\n transition,\n fromState,\n toState,\n player,\n isFallbackTransition\n });\n if (!isFallbackTransition) {\n addClass(element, QUEUED_CLASSNAME);\n player.onStart(() => {\n removeClass(element, QUEUED_CLASSNAME);\n });\n }\n player.onDone(() => {\n let index = this.players.indexOf(player);\n if (index >= 0) {\n this.players.splice(index, 1);\n }\n const players = this._engine.playersByElement.get(element);\n if (players) {\n let index = players.indexOf(player);\n if (index >= 0) {\n players.splice(index, 1);\n }\n }\n });\n this.players.push(player);\n playersOnElement.push(player);\n return player;\n }\n deregister(name) {\n this._triggers.delete(name);\n this._engine.statesByElement.forEach(stateMap => stateMap.delete(name));\n this._elementListeners.forEach((listeners, element) => {\n this._elementListeners.set(element, listeners.filter(entry => {\n return entry.name != name;\n }));\n });\n }\n clearElementCache(element) {\n this._engine.statesByElement.delete(element);\n this._elementListeners.delete(element);\n const elementPlayers = this._engine.playersByElement.get(element);\n if (elementPlayers) {\n elementPlayers.forEach(player => player.destroy());\n this._engine.playersByElement.delete(element);\n }\n }\n _signalRemovalForInnerTriggers(rootElement, context) {\n const elements = this._engine.driver.query(rootElement, NG_TRIGGER_SELECTOR, true);\n // emulate a leave animation for all inner nodes within this node.\n // If there are no animations found for any of the nodes then clear the cache\n // for the element.\n elements.forEach(elm => {\n // this means that an inner remove() operation has already kicked off\n // the animation on this element...\n if (elm[REMOVAL_FLAG]) return;\n const namespaces = this._engine.fetchNamespacesByElement(elm);\n if (namespaces.size) {\n namespaces.forEach(ns => ns.triggerLeaveAnimation(elm, context, false, true));\n } else {\n this.clearElementCache(elm);\n }\n });\n // If the child elements were removed along with the parent, their animations might not\n // have completed. Clear all the elements from the cache so we don't end up with a memory leak.\n this._engine.afterFlushAnimationsDone(() => elements.forEach(elm => this.clearElementCache(elm)));\n }\n triggerLeaveAnimation(element, context, destroyAfterComplete, defaultToFallback) {\n const triggerStates = this._engine.statesByElement.get(element);\n const previousTriggersValues = new Map();\n if (triggerStates) {\n const players = [];\n triggerStates.forEach((state, triggerName) => {\n previousTriggersValues.set(triggerName, state.value);\n // this check is here in the event that an element is removed\n // twice (both on the host level and the component level)\n if (this._triggers.has(triggerName)) {\n const player = this.trigger(element, triggerName, VOID_VALUE, defaultToFallback);\n if (player) {\n players.push(player);\n }\n }\n });\n if (players.length) {\n this._engine.markElementAsRemoved(this.id, element, true, context, previousTriggersValues);\n if (destroyAfterComplete) {\n optimizeGroupPlayer(players).onDone(() => this._engine.processLeaveNode(element));\n }\n return true;\n }\n }\n return false;\n }\n prepareLeaveAnimationListeners(element) {\n const listeners = this._elementListeners.get(element);\n const elementStates = this._engine.statesByElement.get(element);\n // if this statement fails then it means that the element was picked up\n // by an earlier flush (or there are no listeners at all to track the leave).\n if (listeners && elementStates) {\n const visitedTriggers = new Set();\n listeners.forEach(listener => {\n const triggerName = listener.name;\n if (visitedTriggers.has(triggerName)) return;\n visitedTriggers.add(triggerName);\n const trigger = this._triggers.get(triggerName);\n const transition = trigger.fallbackTransition;\n const fromState = elementStates.get(triggerName) || DEFAULT_STATE_VALUE;\n const toState = new StateValue(VOID_VALUE);\n const player = new TransitionAnimationPlayer(this.id, triggerName, element);\n this._engine.totalQueuedPlayers++;\n this._queue.push({\n element,\n triggerName,\n transition,\n fromState,\n toState,\n player,\n isFallbackTransition: true\n });\n });\n }\n }\n removeNode(element, context) {\n const engine = this._engine;\n if (element.childElementCount) {\n this._signalRemovalForInnerTriggers(element, context);\n }\n // this means that a * => VOID animation was detected and kicked off\n if (this.triggerLeaveAnimation(element, context, true)) return;\n // find the player that is animating and make sure that the\n // removal is delayed until that player has completed\n let containsPotentialParentTransition = false;\n if (engine.totalAnimations) {\n const currentPlayers = engine.players.length ? engine.playersByQueriedElement.get(element) : [];\n // when this `if statement` does not continue forward it means that\n // a previous animation query has selected the current element and\n // is animating it. In this situation want to continue forwards and\n // allow the element to be queued up for animation later.\n if (currentPlayers && currentPlayers.length) {\n containsPotentialParentTransition = true;\n } else {\n let parent = element;\n while (parent = parent.parentNode) {\n const triggers = engine.statesByElement.get(parent);\n if (triggers) {\n containsPotentialParentTransition = true;\n break;\n }\n }\n }\n }\n // at this stage we know that the element will either get removed\n // during flush or will be picked up by a parent query. Either way\n // we need to fire the listeners for this element when it DOES get\n // removed (once the query parent animation is done or after flush)\n this.prepareLeaveAnimationListeners(element);\n // whether or not a parent has an animation we need to delay the deferral of the leave\n // operation until we have more information (which we do after flush() has been called)\n if (containsPotentialParentTransition) {\n engine.markElementAsRemoved(this.id, element, false, context);\n } else {\n const removalFlag = element[REMOVAL_FLAG];\n if (!removalFlag || removalFlag === NULL_REMOVAL_STATE) {\n // we do this after the flush has occurred such\n // that the callbacks can be fired\n engine.afterFlush(() => this.clearElementCache(element));\n engine.destroyInnerAnimations(element);\n engine._onRemovalComplete(element, context);\n }\n }\n }\n insertNode(element, parent) {\n addClass(element, this._hostClassName);\n }\n drainQueuedTransitions(microtaskId) {\n const instructions = [];\n this._queue.forEach(entry => {\n const player = entry.player;\n if (player.destroyed) return;\n const element = entry.element;\n const listeners = this._elementListeners.get(element);\n if (listeners) {\n listeners.forEach(listener => {\n if (listener.name == entry.triggerName) {\n const baseEvent = makeAnimationEvent(element, entry.triggerName, entry.fromState.value, entry.toState.value);\n baseEvent['_data'] = microtaskId;\n listenOnPlayer(entry.player, listener.phase, baseEvent, listener.callback);\n }\n });\n }\n if (player.markedForDestroy) {\n this._engine.afterFlush(() => {\n // now we can destroy the element properly since the event listeners have\n // been bound to the player\n player.destroy();\n });\n } else {\n instructions.push(entry);\n }\n });\n this._queue = [];\n return instructions.sort((a, b) => {\n // if depCount == 0 them move to front\n // otherwise if a contains b then move back\n const d0 = a.transition.ast.depCount;\n const d1 = b.transition.ast.depCount;\n if (d0 == 0 || d1 == 0) {\n return d0 - d1;\n }\n return this._engine.driver.containsElement(a.element, b.element) ? 1 : -1;\n });\n }\n destroy(context) {\n this.players.forEach(p => p.destroy());\n this._signalRemovalForInnerTriggers(this.hostElement, context);\n }\n}\nclass TransitionAnimationEngine {\n /** @internal */\n _onRemovalComplete(element, context) {\n this.onRemovalComplete(element, context);\n }\n constructor(bodyNode, driver, _normalizer) {\n this.bodyNode = bodyNode;\n this.driver = driver;\n this._normalizer = _normalizer;\n this.players = [];\n this.newHostElements = new Map();\n this.playersByElement = new Map();\n this.playersByQueriedElement = new Map();\n this.statesByElement = new Map();\n this.disabledNodes = new Set();\n this.totalAnimations = 0;\n this.totalQueuedPlayers = 0;\n this._namespaceLookup = {};\n this._namespaceList = [];\n this._flushFns = [];\n this._whenQuietFns = [];\n this.namespacesByHostElement = new Map();\n this.collectedEnterElements = [];\n this.collectedLeaveElements = [];\n // this method is designed to be overridden by the code that uses this engine\n this.onRemovalComplete = (element, context) => {};\n }\n get queuedPlayers() {\n const players = [];\n this._namespaceList.forEach(ns => {\n ns.players.forEach(player => {\n if (player.queued) {\n players.push(player);\n }\n });\n });\n return players;\n }\n createNamespace(namespaceId, hostElement) {\n const ns = new AnimationTransitionNamespace(namespaceId, hostElement, this);\n if (this.bodyNode && this.driver.containsElement(this.bodyNode, hostElement)) {\n this._balanceNamespaceList(ns, hostElement);\n } else {\n // defer this later until flush during when the host element has\n // been inserted so that we know exactly where to place it in\n // the namespace list\n this.newHostElements.set(hostElement, ns);\n // given that this host element is a part of the animation code, it\n // may or may not be inserted by a parent node that is of an\n // animation renderer type. If this happens then we can still have\n // access to this item when we query for :enter nodes. If the parent\n // is a renderer then the set data-structure will normalize the entry\n this.collectEnterElement(hostElement);\n }\n return this._namespaceLookup[namespaceId] = ns;\n }\n _balanceNamespaceList(ns, hostElement) {\n const namespaceList = this._namespaceList;\n const namespacesByHostElement = this.namespacesByHostElement;\n const limit = namespaceList.length - 1;\n if (limit >= 0) {\n let found = false;\n // Find the closest ancestor with an existing namespace so we can then insert `ns` after it,\n // establishing a top-down ordering of namespaces in `this._namespaceList`.\n let ancestor = this.driver.getParentElement(hostElement);\n while (ancestor) {\n const ancestorNs = namespacesByHostElement.get(ancestor);\n if (ancestorNs) {\n // An animation namespace has been registered for this ancestor, so we insert `ns`\n // right after it to establish top-down ordering of animation namespaces.\n const index = namespaceList.indexOf(ancestorNs);\n namespaceList.splice(index + 1, 0, ns);\n found = true;\n break;\n }\n ancestor = this.driver.getParentElement(ancestor);\n }\n if (!found) {\n // No namespace exists that is an ancestor of `ns`, so `ns` is inserted at the front to\n // ensure that any existing descendants are ordered after `ns`, retaining the desired\n // top-down ordering.\n namespaceList.unshift(ns);\n }\n } else {\n namespaceList.push(ns);\n }\n namespacesByHostElement.set(hostElement, ns);\n return ns;\n }\n register(namespaceId, hostElement) {\n let ns = this._namespaceLookup[namespaceId];\n if (!ns) {\n ns = this.createNamespace(namespaceId, hostElement);\n }\n return ns;\n }\n registerTrigger(namespaceId, name, trigger) {\n let ns = this._namespaceLookup[namespaceId];\n if (ns && ns.register(name, trigger)) {\n this.totalAnimations++;\n }\n }\n destroy(namespaceId, context) {\n if (!namespaceId) return;\n this.afterFlush(() => {});\n this.afterFlushAnimationsDone(() => {\n const ns = this._fetchNamespace(namespaceId);\n this.namespacesByHostElement.delete(ns.hostElement);\n const index = this._namespaceList.indexOf(ns);\n if (index >= 0) {\n this._namespaceList.splice(index, 1);\n }\n ns.destroy(context);\n delete this._namespaceLookup[namespaceId];\n });\n }\n _fetchNamespace(id) {\n return this._namespaceLookup[id];\n }\n fetchNamespacesByElement(element) {\n // normally there should only be one namespace per element, however\n // if @triggers are placed on both the component element and then\n // its host element (within the component code) then there will be\n // two namespaces returned. We use a set here to simply deduplicate\n // the namespaces in case (for the reason described above) there are multiple triggers\n const namespaces = new Set();\n const elementStates = this.statesByElement.get(element);\n if (elementStates) {\n for (let stateValue of elementStates.values()) {\n if (stateValue.namespaceId) {\n const ns = this._fetchNamespace(stateValue.namespaceId);\n if (ns) {\n namespaces.add(ns);\n }\n }\n }\n }\n return namespaces;\n }\n trigger(namespaceId, element, name, value) {\n if (isElementNode(element)) {\n const ns = this._fetchNamespace(namespaceId);\n if (ns) {\n ns.trigger(element, name, value);\n return true;\n }\n }\n return false;\n }\n insertNode(namespaceId, element, parent, insertBefore) {\n if (!isElementNode(element)) return;\n // special case for when an element is removed and reinserted (move operation)\n // when this occurs we do not want to use the element for deletion later\n const details = element[REMOVAL_FLAG];\n if (details && details.setForRemoval) {\n details.setForRemoval = false;\n details.setForMove = true;\n const index = this.collectedLeaveElements.indexOf(element);\n if (index >= 0) {\n this.collectedLeaveElements.splice(index, 1);\n }\n }\n // in the event that the namespaceId is blank then the caller\n // code does not contain any animation code in it, but it is\n // just being called so that the node is marked as being inserted\n if (namespaceId) {\n const ns = this._fetchNamespace(namespaceId);\n // This if-statement is a workaround for router issue #21947.\n // The router sometimes hits a race condition where while a route\n // is being instantiated a new navigation arrives, triggering leave\n // animation of DOM that has not been fully initialized, until this\n // is resolved, we need to handle the scenario when DOM is not in a\n // consistent state during the animation.\n if (ns) {\n ns.insertNode(element, parent);\n }\n }\n // only *directives and host elements are inserted before\n if (insertBefore) {\n this.collectEnterElement(element);\n }\n }\n collectEnterElement(element) {\n this.collectedEnterElements.push(element);\n }\n markElementAsDisabled(element, value) {\n if (value) {\n if (!this.disabledNodes.has(element)) {\n this.disabledNodes.add(element);\n addClass(element, DISABLED_CLASSNAME);\n }\n } else if (this.disabledNodes.has(element)) {\n this.disabledNodes.delete(element);\n removeClass(element, DISABLED_CLASSNAME);\n }\n }\n removeNode(namespaceId, element, context) {\n if (isElementNode(element)) {\n const ns = namespaceId ? this._fetchNamespace(namespaceId) : null;\n if (ns) {\n ns.removeNode(element, context);\n } else {\n this.markElementAsRemoved(namespaceId, element, false, context);\n }\n const hostNS = this.namespacesByHostElement.get(element);\n if (hostNS && hostNS.id !== namespaceId) {\n hostNS.removeNode(element, context);\n }\n } else {\n this._onRemovalComplete(element, context);\n }\n }\n markElementAsRemoved(namespaceId, element, hasAnimation, context, previousTriggersValues) {\n this.collectedLeaveElements.push(element);\n element[REMOVAL_FLAG] = {\n namespaceId,\n setForRemoval: context,\n hasAnimation,\n removedBeforeQueried: false,\n previousTriggersValues\n };\n }\n listen(namespaceId, element, name, phase, callback) {\n if (isElementNode(element)) {\n return this._fetchNamespace(namespaceId).listen(element, name, phase, callback);\n }\n return () => {};\n }\n _buildInstruction(entry, subTimelines, enterClassName, leaveClassName, skipBuildAst) {\n return entry.transition.build(this.driver, entry.element, entry.fromState.value, entry.toState.value, enterClassName, leaveClassName, entry.fromState.options, entry.toState.options, subTimelines, skipBuildAst);\n }\n destroyInnerAnimations(containerElement) {\n let elements = this.driver.query(containerElement, NG_TRIGGER_SELECTOR, true);\n elements.forEach(element => this.destroyActiveAnimationsForElement(element));\n if (this.playersByQueriedElement.size == 0) return;\n elements = this.driver.query(containerElement, NG_ANIMATING_SELECTOR, true);\n elements.forEach(element => this.finishActiveQueriedAnimationOnElement(element));\n }\n destroyActiveAnimationsForElement(element) {\n const players = this.playersByElement.get(element);\n if (players) {\n players.forEach(player => {\n // special case for when an element is set for destruction, but hasn't started.\n // in this situation we want to delay the destruction until the flush occurs\n // so that any event listeners attached to the player are triggered.\n if (player.queued) {\n player.markedForDestroy = true;\n } else {\n player.destroy();\n }\n });\n }\n }\n finishActiveQueriedAnimationOnElement(element) {\n const players = this.playersByQueriedElement.get(element);\n if (players) {\n players.forEach(player => player.finish());\n }\n }\n whenRenderingDone() {\n return new Promise(resolve => {\n if (this.players.length) {\n return optimizeGroupPlayer(this.players).onDone(() => resolve());\n } else {\n resolve();\n }\n });\n }\n processLeaveNode(element) {\n const details = element[REMOVAL_FLAG];\n if (details && details.setForRemoval) {\n // this will prevent it from removing it twice\n element[REMOVAL_FLAG] = NULL_REMOVAL_STATE;\n if (details.namespaceId) {\n this.destroyInnerAnimations(element);\n const ns = this._fetchNamespace(details.namespaceId);\n if (ns) {\n ns.clearElementCache(element);\n }\n }\n this._onRemovalComplete(element, details.setForRemoval);\n }\n if (element.classList?.contains(DISABLED_CLASSNAME)) {\n this.markElementAsDisabled(element, false);\n }\n this.driver.query(element, DISABLED_SELECTOR, true).forEach(node => {\n this.markElementAsDisabled(node, false);\n });\n }\n flush(microtaskId = -1) {\n let players = [];\n if (this.newHostElements.size) {\n this.newHostElements.forEach((ns, element) => this._balanceNamespaceList(ns, element));\n this.newHostElements.clear();\n }\n if (this.totalAnimations && this.collectedEnterElements.length) {\n for (let i = 0; i < this.collectedEnterElements.length; i++) {\n const elm = this.collectedEnterElements[i];\n addClass(elm, STAR_CLASSNAME);\n }\n }\n if (this._namespaceList.length && (this.totalQueuedPlayers || this.collectedLeaveElements.length)) {\n const cleanupFns = [];\n try {\n players = this._flushAnimations(cleanupFns, microtaskId);\n } finally {\n for (let i = 0; i < cleanupFns.length; i++) {\n cleanupFns[i]();\n }\n }\n } else {\n for (let i = 0; i < this.collectedLeaveElements.length; i++) {\n const element = this.collectedLeaveElements[i];\n this.processLeaveNode(element);\n }\n }\n this.totalQueuedPlayers = 0;\n this.collectedEnterElements.length = 0;\n this.collectedLeaveElements.length = 0;\n this._flushFns.forEach(fn => fn());\n this._flushFns = [];\n if (this._whenQuietFns.length) {\n // we move these over to a variable so that\n // if any new callbacks are registered in another\n // flush they do not populate the existing set\n const quietFns = this._whenQuietFns;\n this._whenQuietFns = [];\n if (players.length) {\n optimizeGroupPlayer(players).onDone(() => {\n quietFns.forEach(fn => fn());\n });\n } else {\n quietFns.forEach(fn => fn());\n }\n }\n }\n reportError(errors) {\n throw triggerTransitionsFailed(errors);\n }\n _flushAnimations(cleanupFns, microtaskId) {\n const subTimelines = new ElementInstructionMap();\n const skippedPlayers = [];\n const skippedPlayersMap = new Map();\n const queuedInstructions = [];\n const queriedElements = new Map();\n const allPreStyleElements = new Map();\n const allPostStyleElements = new Map();\n const disabledElementsSet = new Set();\n this.disabledNodes.forEach(node => {\n disabledElementsSet.add(node);\n const nodesThatAreDisabled = this.driver.query(node, QUEUED_SELECTOR, true);\n for (let i = 0; i < nodesThatAreDisabled.length; i++) {\n disabledElementsSet.add(nodesThatAreDisabled[i]);\n }\n });\n const bodyNode = this.bodyNode;\n const allTriggerElements = Array.from(this.statesByElement.keys());\n const enterNodeMap = buildRootMap(allTriggerElements, this.collectedEnterElements);\n // this must occur before the instructions are built below such that\n // the :enter queries match the elements (since the timeline queries\n // are fired during instruction building).\n const enterNodeMapIds = new Map();\n let i = 0;\n enterNodeMap.forEach((nodes, root) => {\n const className = ENTER_CLASSNAME + i++;\n enterNodeMapIds.set(root, className);\n nodes.forEach(node => addClass(node, className));\n });\n const allLeaveNodes = [];\n const mergedLeaveNodes = new Set();\n const leaveNodesWithoutAnimations = new Set();\n for (let i = 0; i < this.collectedLeaveElements.length; i++) {\n const element = this.collectedLeaveElements[i];\n const details = element[REMOVAL_FLAG];\n if (details && details.setForRemoval) {\n allLeaveNodes.push(element);\n mergedLeaveNodes.add(element);\n if (details.hasAnimation) {\n this.driver.query(element, STAR_SELECTOR, true).forEach(elm => mergedLeaveNodes.add(elm));\n } else {\n leaveNodesWithoutAnimations.add(element);\n }\n }\n }\n const leaveNodeMapIds = new Map();\n const leaveNodeMap = buildRootMap(allTriggerElements, Array.from(mergedLeaveNodes));\n leaveNodeMap.forEach((nodes, root) => {\n const className = LEAVE_CLASSNAME + i++;\n leaveNodeMapIds.set(root, className);\n nodes.forEach(node => addClass(node, className));\n });\n cleanupFns.push(() => {\n enterNodeMap.forEach((nodes, root) => {\n const className = enterNodeMapIds.get(root);\n nodes.forEach(node => removeClass(node, className));\n });\n leaveNodeMap.forEach((nodes, root) => {\n const className = leaveNodeMapIds.get(root);\n nodes.forEach(node => removeClass(node, className));\n });\n allLeaveNodes.forEach(element => {\n this.processLeaveNode(element);\n });\n });\n const allPlayers = [];\n const erroneousTransitions = [];\n for (let i = this._namespaceList.length - 1; i >= 0; i--) {\n const ns = this._namespaceList[i];\n ns.drainQueuedTransitions(microtaskId).forEach(entry => {\n const player = entry.player;\n const element = entry.element;\n allPlayers.push(player);\n if (this.collectedEnterElements.length) {\n const details = element[REMOVAL_FLAG];\n // animations for move operations (elements being removed and reinserted,\n // e.g. when the order of an *ngFor list changes) are currently not supported\n if (details && details.setForMove) {\n if (details.previousTriggersValues && details.previousTriggersValues.has(entry.triggerName)) {\n const previousValue = details.previousTriggersValues.get(entry.triggerName);\n // we need to restore the previous trigger value since the element has\n // only been moved and hasn't actually left the DOM\n const triggersWithStates = this.statesByElement.get(entry.element);\n if (triggersWithStates && triggersWithStates.has(entry.triggerName)) {\n const state = triggersWithStates.get(entry.triggerName);\n state.value = previousValue;\n triggersWithStates.set(entry.triggerName, state);\n }\n }\n player.destroy();\n return;\n }\n }\n const nodeIsOrphaned = !bodyNode || !this.driver.containsElement(bodyNode, element);\n const leaveClassName = leaveNodeMapIds.get(element);\n const enterClassName = enterNodeMapIds.get(element);\n const instruction = this._buildInstruction(entry, subTimelines, enterClassName, leaveClassName, nodeIsOrphaned);\n if (instruction.errors && instruction.errors.length) {\n erroneousTransitions.push(instruction);\n return;\n }\n // even though the element may not be in the DOM, it may still\n // be added at a later point (due to the mechanics of content\n // projection and/or dynamic component insertion) therefore it's\n // important to still style the element.\n if (nodeIsOrphaned) {\n player.onStart(() => eraseStyles(element, instruction.fromStyles));\n player.onDestroy(() => setStyles(element, instruction.toStyles));\n skippedPlayers.push(player);\n return;\n }\n // if an unmatched transition is queued and ready to go\n // then it SHOULD NOT render an animation and cancel the\n // previously running animations.\n if (entry.isFallbackTransition) {\n player.onStart(() => eraseStyles(element, instruction.fromStyles));\n player.onDestroy(() => setStyles(element, instruction.toStyles));\n skippedPlayers.push(player);\n return;\n }\n // this means that if a parent animation uses this animation as a sub-trigger\n // then it will instruct the timeline builder not to add a player delay, but\n // instead stretch the first keyframe gap until the animation starts. This is\n // important in order to prevent extra initialization styles from being\n // required by the user for the animation.\n const timelines = [];\n instruction.timelines.forEach(tl => {\n tl.stretchStartingKeyframe = true;\n if (!this.disabledNodes.has(tl.element)) {\n timelines.push(tl);\n }\n });\n instruction.timelines = timelines;\n subTimelines.append(element, instruction.timelines);\n const tuple = {\n instruction,\n player,\n element\n };\n queuedInstructions.push(tuple);\n instruction.queriedElements.forEach(element => getOrSetDefaultValue(queriedElements, element, []).push(player));\n instruction.preStyleProps.forEach((stringMap, element) => {\n if (stringMap.size) {\n let setVal = allPreStyleElements.get(element);\n if (!setVal) {\n allPreStyleElements.set(element, setVal = new Set());\n }\n stringMap.forEach((_, prop) => setVal.add(prop));\n }\n });\n instruction.postStyleProps.forEach((stringMap, element) => {\n let setVal = allPostStyleElements.get(element);\n if (!setVal) {\n allPostStyleElements.set(element, setVal = new Set());\n }\n stringMap.forEach((_, prop) => setVal.add(prop));\n });\n });\n }\n if (erroneousTransitions.length) {\n const errors = [];\n erroneousTransitions.forEach(instruction => {\n errors.push(transitionFailed(instruction.triggerName, instruction.errors));\n });\n allPlayers.forEach(player => player.destroy());\n this.reportError(errors);\n }\n const allPreviousPlayersMap = new Map();\n // this map tells us which element in the DOM tree is contained by\n // which animation. Further down this map will get populated once\n // the players are built and in doing so we can use it to efficiently\n // figure out if a sub player is skipped due to a parent player having priority.\n const animationElementMap = new Map();\n queuedInstructions.forEach(entry => {\n const element = entry.element;\n if (subTimelines.has(element)) {\n animationElementMap.set(element, element);\n this._beforeAnimationBuild(entry.player.namespaceId, entry.instruction, allPreviousPlayersMap);\n }\n });\n skippedPlayers.forEach(player => {\n const element = player.element;\n const previousPlayers = this._getPreviousPlayers(element, false, player.namespaceId, player.triggerName, null);\n previousPlayers.forEach(prevPlayer => {\n getOrSetDefaultValue(allPreviousPlayersMap, element, []).push(prevPlayer);\n prevPlayer.destroy();\n });\n });\n // this is a special case for nodes that will be removed either by\n // having their own leave animations or by being queried in a container\n // that will be removed once a parent animation is complete. The idea\n // here is that * styles must be identical to ! styles because of\n // backwards compatibility (* is also filled in by default in many places).\n // Otherwise * styles will return an empty value or \"auto\" since the element\n // passed to getComputedStyle will not be visible (since * === destination)\n const replaceNodes = allLeaveNodes.filter(node => {\n return replacePostStylesAsPre(node, allPreStyleElements, allPostStyleElements);\n });\n // POST STAGE: fill the * styles\n const postStylesMap = new Map();\n const allLeaveQueriedNodes = cloakAndComputeStyles(postStylesMap, this.driver, leaveNodesWithoutAnimations, allPostStyleElements, AUTO_STYLE);\n allLeaveQueriedNodes.forEach(node => {\n if (replacePostStylesAsPre(node, allPreStyleElements, allPostStyleElements)) {\n replaceNodes.push(node);\n }\n });\n // PRE STAGE: fill the ! styles\n const preStylesMap = new Map();\n enterNodeMap.forEach((nodes, root) => {\n cloakAndComputeStyles(preStylesMap, this.driver, new Set(nodes), allPreStyleElements, ɵPRE_STYLE);\n });\n replaceNodes.forEach(node => {\n const post = postStylesMap.get(node);\n const pre = preStylesMap.get(node);\n postStylesMap.set(node, new Map([...(post?.entries() ?? []), ...(pre?.entries() ?? [])]));\n });\n const rootPlayers = [];\n const subPlayers = [];\n const NO_PARENT_ANIMATION_ELEMENT_DETECTED = {};\n queuedInstructions.forEach(entry => {\n const {\n element,\n player,\n instruction\n } = entry;\n // this means that it was never consumed by a parent animation which\n // means that it is independent and therefore should be set for animation\n if (subTimelines.has(element)) {\n if (disabledElementsSet.has(element)) {\n player.onDestroy(() => setStyles(element, instruction.toStyles));\n player.disabled = true;\n player.overrideTotalTime(instruction.totalTime);\n skippedPlayers.push(player);\n return;\n }\n // this will flow up the DOM and query the map to figure out\n // if a parent animation has priority over it. In the situation\n // that a parent is detected then it will cancel the loop. If\n // nothing is detected, or it takes a few hops to find a parent,\n // then it will fill in the missing nodes and signal them as having\n // a detected parent (or a NO_PARENT value via a special constant).\n let parentWithAnimation = NO_PARENT_ANIMATION_ELEMENT_DETECTED;\n if (animationElementMap.size > 1) {\n let elm = element;\n const parentsToAdd = [];\n while (elm = elm.parentNode) {\n const detectedParent = animationElementMap.get(elm);\n if (detectedParent) {\n parentWithAnimation = detectedParent;\n break;\n }\n parentsToAdd.push(elm);\n }\n parentsToAdd.forEach(parent => animationElementMap.set(parent, parentWithAnimation));\n }\n const innerPlayer = this._buildAnimation(player.namespaceId, instruction, allPreviousPlayersMap, skippedPlayersMap, preStylesMap, postStylesMap);\n player.setRealPlayer(innerPlayer);\n if (parentWithAnimation === NO_PARENT_ANIMATION_ELEMENT_DETECTED) {\n rootPlayers.push(player);\n } else {\n const parentPlayers = this.playersByElement.get(parentWithAnimation);\n if (parentPlayers && parentPlayers.length) {\n player.parentPlayer = optimizeGroupPlayer(parentPlayers);\n }\n skippedPlayers.push(player);\n }\n } else {\n eraseStyles(element, instruction.fromStyles);\n player.onDestroy(() => setStyles(element, instruction.toStyles));\n // there still might be a ancestor player animating this\n // element therefore we will still add it as a sub player\n // even if its animation may be disabled\n subPlayers.push(player);\n if (disabledElementsSet.has(element)) {\n skippedPlayers.push(player);\n }\n }\n });\n // find all of the sub players' corresponding inner animation players\n subPlayers.forEach(player => {\n // even if no players are found for a sub animation it\n // will still complete itself after the next tick since it's Noop\n const playersForElement = skippedPlayersMap.get(player.element);\n if (playersForElement && playersForElement.length) {\n const innerPlayer = optimizeGroupPlayer(playersForElement);\n player.setRealPlayer(innerPlayer);\n }\n });\n // the reason why we don't actually play the animation is\n // because all that a skipped player is designed to do is to\n // fire the start/done transition callback events\n skippedPlayers.forEach(player => {\n if (player.parentPlayer) {\n player.syncPlayerEvents(player.parentPlayer);\n } else {\n player.destroy();\n }\n });\n // run through all of the queued removals and see if they\n // were picked up by a query. If not then perform the removal\n // operation right away unless a parent animation is ongoing.\n for (let i = 0; i < allLeaveNodes.length; i++) {\n const element = allLeaveNodes[i];\n const details = element[REMOVAL_FLAG];\n removeClass(element, LEAVE_CLASSNAME);\n // this means the element has a removal animation that is being\n // taken care of and therefore the inner elements will hang around\n // until that animation is over (or the parent queried animation)\n if (details && details.hasAnimation) continue;\n let players = [];\n // if this element is queried or if it contains queried children\n // then we want for the element not to be removed from the page\n // until the queried animations have finished\n if (queriedElements.size) {\n let queriedPlayerResults = queriedElements.get(element);\n if (queriedPlayerResults && queriedPlayerResults.length) {\n players.push(...queriedPlayerResults);\n }\n let queriedInnerElements = this.driver.query(element, NG_ANIMATING_SELECTOR, true);\n for (let j = 0; j < queriedInnerElements.length; j++) {\n let queriedPlayers = queriedElements.get(queriedInnerElements[j]);\n if (queriedPlayers && queriedPlayers.length) {\n players.push(...queriedPlayers);\n }\n }\n }\n const activePlayers = players.filter(p => !p.destroyed);\n if (activePlayers.length) {\n removeNodesAfterAnimationDone(this, element, activePlayers);\n } else {\n this.processLeaveNode(element);\n }\n }\n // this is required so the cleanup method doesn't remove them\n allLeaveNodes.length = 0;\n rootPlayers.forEach(player => {\n this.players.push(player);\n player.onDone(() => {\n player.destroy();\n const index = this.players.indexOf(player);\n this.players.splice(index, 1);\n });\n player.play();\n });\n return rootPlayers;\n }\n afterFlush(callback) {\n this._flushFns.push(callback);\n }\n afterFlushAnimationsDone(callback) {\n this._whenQuietFns.push(callback);\n }\n _getPreviousPlayers(element, isQueriedElement, namespaceId, triggerName, toStateValue) {\n let players = [];\n if (isQueriedElement) {\n const queriedElementPlayers = this.playersByQueriedElement.get(element);\n if (queriedElementPlayers) {\n players = queriedElementPlayers;\n }\n } else {\n const elementPlayers = this.playersByElement.get(element);\n if (elementPlayers) {\n const isRemovalAnimation = !toStateValue || toStateValue == VOID_VALUE;\n elementPlayers.forEach(player => {\n if (player.queued) return;\n if (!isRemovalAnimation && player.triggerName != triggerName) return;\n players.push(player);\n });\n }\n }\n if (namespaceId || triggerName) {\n players = players.filter(player => {\n if (namespaceId && namespaceId != player.namespaceId) return false;\n if (triggerName && triggerName != player.triggerName) return false;\n return true;\n });\n }\n return players;\n }\n _beforeAnimationBuild(namespaceId, instruction, allPreviousPlayersMap) {\n const triggerName = instruction.triggerName;\n const rootElement = instruction.element;\n // when a removal animation occurs, ALL previous players are collected\n // and destroyed (even if they are outside of the current namespace)\n const targetNameSpaceId = instruction.isRemovalTransition ? undefined : namespaceId;\n const targetTriggerName = instruction.isRemovalTransition ? undefined : triggerName;\n for (const timelineInstruction of instruction.timelines) {\n const element = timelineInstruction.element;\n const isQueriedElement = element !== rootElement;\n const players = getOrSetDefaultValue(allPreviousPlayersMap, element, []);\n const previousPlayers = this._getPreviousPlayers(element, isQueriedElement, targetNameSpaceId, targetTriggerName, instruction.toState);\n previousPlayers.forEach(player => {\n const realPlayer = player.getRealPlayer();\n if (realPlayer.beforeDestroy) {\n realPlayer.beforeDestroy();\n }\n player.destroy();\n players.push(player);\n });\n }\n // this needs to be done so that the PRE/POST styles can be\n // computed properly without interfering with the previous animation\n eraseStyles(rootElement, instruction.fromStyles);\n }\n _buildAnimation(namespaceId, instruction, allPreviousPlayersMap, skippedPlayersMap, preStylesMap, postStylesMap) {\n const triggerName = instruction.triggerName;\n const rootElement = instruction.element;\n // we first run this so that the previous animation player\n // data can be passed into the successive animation players\n const allQueriedPlayers = [];\n const allConsumedElements = new Set();\n const allSubElements = new Set();\n const allNewPlayers = instruction.timelines.map(timelineInstruction => {\n const element = timelineInstruction.element;\n allConsumedElements.add(element);\n // FIXME (matsko): make sure to-be-removed animations are removed properly\n const details = element[REMOVAL_FLAG];\n if (details && details.removedBeforeQueried) return new NoopAnimationPlayer(timelineInstruction.duration, timelineInstruction.delay);\n const isQueriedElement = element !== rootElement;\n const previousPlayers = flattenGroupPlayers((allPreviousPlayersMap.get(element) || EMPTY_PLAYER_ARRAY).map(p => p.getRealPlayer())).filter(p => {\n // the `element` is not apart of the AnimationPlayer definition, but\n // Mock/WebAnimations\n // use the element within their implementation. This will be added in Angular5 to\n // AnimationPlayer\n const pp = p;\n return pp.element ? pp.element === element : false;\n });\n const preStyles = preStylesMap.get(element);\n const postStyles = postStylesMap.get(element);\n const keyframes = normalizeKeyframes$1(this._normalizer, timelineInstruction.keyframes, preStyles, postStyles);\n const player = this._buildPlayer(timelineInstruction, keyframes, previousPlayers);\n // this means that this particular player belongs to a sub trigger. It is\n // important that we match this player up with the corresponding (@trigger.listener)\n if (timelineInstruction.subTimeline && skippedPlayersMap) {\n allSubElements.add(element);\n }\n if (isQueriedElement) {\n const wrappedPlayer = new TransitionAnimationPlayer(namespaceId, triggerName, element);\n wrappedPlayer.setRealPlayer(player);\n allQueriedPlayers.push(wrappedPlayer);\n }\n return player;\n });\n allQueriedPlayers.forEach(player => {\n getOrSetDefaultValue(this.playersByQueriedElement, player.element, []).push(player);\n player.onDone(() => deleteOrUnsetInMap(this.playersByQueriedElement, player.element, player));\n });\n allConsumedElements.forEach(element => addClass(element, NG_ANIMATING_CLASSNAME));\n const player = optimizeGroupPlayer(allNewPlayers);\n player.onDestroy(() => {\n allConsumedElements.forEach(element => removeClass(element, NG_ANIMATING_CLASSNAME));\n setStyles(rootElement, instruction.toStyles);\n });\n // this basically makes all of the callbacks for sub element animations\n // be dependent on the upper players for when they finish\n allSubElements.forEach(element => {\n getOrSetDefaultValue(skippedPlayersMap, element, []).push(player);\n });\n return player;\n }\n _buildPlayer(instruction, keyframes, previousPlayers) {\n if (keyframes.length > 0) {\n return this.driver.animate(instruction.element, keyframes, instruction.duration, instruction.delay, instruction.easing, previousPlayers);\n }\n // special case for when an empty transition|definition is provided\n // ... there is no point in rendering an empty animation\n return new NoopAnimationPlayer(instruction.duration, instruction.delay);\n }\n}\nclass TransitionAnimationPlayer {\n constructor(namespaceId, triggerName, element) {\n this.namespaceId = namespaceId;\n this.triggerName = triggerName;\n this.element = element;\n this._player = new NoopAnimationPlayer();\n this._containsRealPlayer = false;\n this._queuedCallbacks = new Map();\n this.destroyed = false;\n this.parentPlayer = null;\n this.markedForDestroy = false;\n this.disabled = false;\n this.queued = true;\n this.totalTime = 0;\n }\n setRealPlayer(player) {\n if (this._containsRealPlayer) return;\n this._player = player;\n this._queuedCallbacks.forEach((callbacks, phase) => {\n callbacks.forEach(callback => listenOnPlayer(player, phase, undefined, callback));\n });\n this._queuedCallbacks.clear();\n this._containsRealPlayer = true;\n this.overrideTotalTime(player.totalTime);\n this.queued = false;\n }\n getRealPlayer() {\n return this._player;\n }\n overrideTotalTime(totalTime) {\n this.totalTime = totalTime;\n }\n syncPlayerEvents(player) {\n const p = this._player;\n if (p.triggerCallback) {\n player.onStart(() => p.triggerCallback('start'));\n }\n player.onDone(() => this.finish());\n player.onDestroy(() => this.destroy());\n }\n _queueEvent(name, callback) {\n getOrSetDefaultValue(this._queuedCallbacks, name, []).push(callback);\n }\n onDone(fn) {\n if (this.queued) {\n this._queueEvent('done', fn);\n }\n this._player.onDone(fn);\n }\n onStart(fn) {\n if (this.queued) {\n this._queueEvent('start', fn);\n }\n this._player.onStart(fn);\n }\n onDestroy(fn) {\n if (this.queued) {\n this._queueEvent('destroy', fn);\n }\n this._player.onDestroy(fn);\n }\n init() {\n this._player.init();\n }\n hasStarted() {\n return this.queued ? false : this._player.hasStarted();\n }\n play() {\n !this.queued && this._player.play();\n }\n pause() {\n !this.queued && this._player.pause();\n }\n restart() {\n !this.queued && this._player.restart();\n }\n finish() {\n this._player.finish();\n }\n destroy() {\n this.destroyed = true;\n this._player.destroy();\n }\n reset() {\n !this.queued && this._player.reset();\n }\n setPosition(p) {\n if (!this.queued) {\n this._player.setPosition(p);\n }\n }\n getPosition() {\n return this.queued ? 0 : this._player.getPosition();\n }\n /** @internal */\n triggerCallback(phaseName) {\n const p = this._player;\n if (p.triggerCallback) {\n p.triggerCallback(phaseName);\n }\n }\n}\nfunction deleteOrUnsetInMap(map, key, value) {\n let currentValues = map.get(key);\n if (currentValues) {\n if (currentValues.length) {\n const index = currentValues.indexOf(value);\n currentValues.splice(index, 1);\n }\n if (currentValues.length == 0) {\n map.delete(key);\n }\n }\n return currentValues;\n}\nfunction normalizeTriggerValue(value) {\n // we use `!= null` here because it's the most simple\n // way to test against a \"falsy\" value without mixing\n // in empty strings or a zero value. DO NOT OPTIMIZE.\n return value != null ? value : null;\n}\nfunction isElementNode(node) {\n return node && node['nodeType'] === 1;\n}\nfunction isTriggerEventValid(eventName) {\n return eventName == 'start' || eventName == 'done';\n}\nfunction cloakElement(element, value) {\n const oldValue = element.style.display;\n element.style.display = value != null ? value : 'none';\n return oldValue;\n}\nfunction cloakAndComputeStyles(valuesMap, driver, elements, elementPropsMap, defaultStyle) {\n const cloakVals = [];\n elements.forEach(element => cloakVals.push(cloakElement(element)));\n const failedElements = [];\n elementPropsMap.forEach((props, element) => {\n const styles = new Map();\n props.forEach(prop => {\n const value = driver.computeStyle(element, prop, defaultStyle);\n styles.set(prop, value);\n // there is no easy way to detect this because a sub element could be removed\n // by a parent animation element being detached.\n if (!value || value.length == 0) {\n element[REMOVAL_FLAG] = NULL_REMOVED_QUERIED_STATE;\n failedElements.push(element);\n }\n });\n valuesMap.set(element, styles);\n });\n // we use a index variable here since Set.forEach(a, i) does not return\n // an index value for the closure (but instead just the value)\n let i = 0;\n elements.forEach(element => cloakElement(element, cloakVals[i++]));\n return failedElements;\n}\n/*\nSince the Angular renderer code will return a collection of inserted\nnodes in all areas of a DOM tree, it's up to this algorithm to figure\nout which nodes are roots for each animation @trigger.\n\nBy placing each inserted node into a Set and traversing upwards, it\nis possible to find the @trigger elements and well any direct *star\ninsertion nodes, if a @trigger root is found then the enter element\nis placed into the Map[@trigger] spot.\n */\nfunction buildRootMap(roots, nodes) {\n const rootMap = new Map();\n roots.forEach(root => rootMap.set(root, []));\n if (nodes.length == 0) return rootMap;\n const NULL_NODE = 1;\n const nodeSet = new Set(nodes);\n const localRootMap = new Map();\n function getRoot(node) {\n if (!node) return NULL_NODE;\n let root = localRootMap.get(node);\n if (root) return root;\n const parent = node.parentNode;\n if (rootMap.has(parent)) {\n // ngIf inside @trigger\n root = parent;\n } else if (nodeSet.has(parent)) {\n // ngIf inside ngIf\n root = NULL_NODE;\n } else {\n // recurse upwards\n root = getRoot(parent);\n }\n localRootMap.set(node, root);\n return root;\n }\n nodes.forEach(node => {\n const root = getRoot(node);\n if (root !== NULL_NODE) {\n rootMap.get(root).push(node);\n }\n });\n return rootMap;\n}\nfunction addClass(element, className) {\n element.classList?.add(className);\n}\nfunction removeClass(element, className) {\n element.classList?.remove(className);\n}\nfunction removeNodesAfterAnimationDone(engine, element, players) {\n optimizeGroupPlayer(players).onDone(() => engine.processLeaveNode(element));\n}\nfunction flattenGroupPlayers(players) {\n const finalPlayers = [];\n _flattenGroupPlayersRecur(players, finalPlayers);\n return finalPlayers;\n}\nfunction _flattenGroupPlayersRecur(players, finalPlayers) {\n for (let i = 0; i < players.length; i++) {\n const player = players[i];\n if (player instanceof ɵAnimationGroupPlayer) {\n _flattenGroupPlayersRecur(player.players, finalPlayers);\n } else {\n finalPlayers.push(player);\n }\n }\n}\nfunction objEquals(a, b) {\n const k1 = Object.keys(a);\n const k2 = Object.keys(b);\n if (k1.length != k2.length) return false;\n for (let i = 0; i < k1.length; i++) {\n const prop = k1[i];\n if (!b.hasOwnProperty(prop) || a[prop] !== b[prop]) return false;\n }\n return true;\n}\nfunction replacePostStylesAsPre(element, allPreStyleElements, allPostStyleElements) {\n const postEntry = allPostStyleElements.get(element);\n if (!postEntry) return false;\n let preEntry = allPreStyleElements.get(element);\n if (preEntry) {\n postEntry.forEach(data => preEntry.add(data));\n } else {\n allPreStyleElements.set(element, postEntry);\n }\n allPostStyleElements.delete(element);\n return true;\n}\nclass AnimationEngine {\n constructor(doc, _driver, _normalizer) {\n this._driver = _driver;\n this._normalizer = _normalizer;\n this._triggerCache = {};\n // this method is designed to be overridden by the code that uses this engine\n this.onRemovalComplete = (element, context) => {};\n this._transitionEngine = new TransitionAnimationEngine(doc.body, _driver, _normalizer);\n this._timelineEngine = new TimelineAnimationEngine(doc.body, _driver, _normalizer);\n this._transitionEngine.onRemovalComplete = (element, context) => this.onRemovalComplete(element, context);\n }\n registerTrigger(componentId, namespaceId, hostElement, name, metadata) {\n const cacheKey = componentId + '-' + name;\n let trigger = this._triggerCache[cacheKey];\n if (!trigger) {\n const errors = [];\n const warnings = [];\n const ast = buildAnimationAst(this._driver, metadata, errors, warnings);\n if (errors.length) {\n throw triggerBuildFailed(name, errors);\n }\n if (warnings.length) {\n warnTriggerBuild(name, warnings);\n }\n trigger = buildTrigger(name, ast, this._normalizer);\n this._triggerCache[cacheKey] = trigger;\n }\n this._transitionEngine.registerTrigger(namespaceId, name, trigger);\n }\n register(namespaceId, hostElement) {\n this._transitionEngine.register(namespaceId, hostElement);\n }\n destroy(namespaceId, context) {\n this._transitionEngine.destroy(namespaceId, context);\n }\n onInsert(namespaceId, element, parent, insertBefore) {\n this._transitionEngine.insertNode(namespaceId, element, parent, insertBefore);\n }\n onRemove(namespaceId, element, context) {\n this._transitionEngine.removeNode(namespaceId, element, context);\n }\n disableAnimations(element, disable) {\n this._transitionEngine.markElementAsDisabled(element, disable);\n }\n process(namespaceId, element, property, value) {\n if (property.charAt(0) == '@') {\n const [id, action] = parseTimelineCommand(property);\n const args = value;\n this._timelineEngine.command(id, element, action, args);\n } else {\n this._transitionEngine.trigger(namespaceId, element, property, value);\n }\n }\n listen(namespaceId, element, eventName, eventPhase, callback) {\n // @@listen\n if (eventName.charAt(0) == '@') {\n const [id, action] = parseTimelineCommand(eventName);\n return this._timelineEngine.listen(id, element, action, callback);\n }\n return this._transitionEngine.listen(namespaceId, element, eventName, eventPhase, callback);\n }\n flush(microtaskId = -1) {\n this._transitionEngine.flush(microtaskId);\n }\n get players() {\n return [...this._transitionEngine.players, ...this._timelineEngine.players];\n }\n whenRenderingDone() {\n return this._transitionEngine.whenRenderingDone();\n }\n afterFlushAnimationsDone(cb) {\n this._transitionEngine.afterFlushAnimationsDone(cb);\n }\n}\n\n/**\n * Returns an instance of `SpecialCasedStyles` if and when any special (non animateable) styles are\n * detected.\n *\n * In CSS there exist properties that cannot be animated within a keyframe animation\n * (whether it be via CSS keyframes or web-animations) and the animation implementation\n * will ignore them. This function is designed to detect those special cased styles and\n * return a container that will be executed at the start and end of the animation.\n *\n * @returns an instance of `SpecialCasedStyles` if any special styles are detected otherwise `null`\n */\nfunction packageNonAnimatableStyles(element, styles) {\n let startStyles = null;\n let endStyles = null;\n if (Array.isArray(styles) && styles.length) {\n startStyles = filterNonAnimatableStyles(styles[0]);\n if (styles.length > 1) {\n endStyles = filterNonAnimatableStyles(styles[styles.length - 1]);\n }\n } else if (styles instanceof Map) {\n startStyles = filterNonAnimatableStyles(styles);\n }\n return startStyles || endStyles ? new SpecialCasedStyles(element, startStyles, endStyles) : null;\n}\n/**\n * Designed to be executed during a keyframe-based animation to apply any special-cased styles.\n *\n * When started (when the `start()` method is run) then the provided `startStyles`\n * will be applied. When finished (when the `finish()` method is called) the\n * `endStyles` will be applied as well any any starting styles. Finally when\n * `destroy()` is called then all styles will be removed.\n */\nclass SpecialCasedStyles {\n static {\n this.initialStylesByElement = new WeakMap();\n }\n constructor(_element, _startStyles, _endStyles) {\n this._element = _element;\n this._startStyles = _startStyles;\n this._endStyles = _endStyles;\n this._state = 0 /* SpecialCasedStylesState.Pending */;\n let initialStyles = SpecialCasedStyles.initialStylesByElement.get(_element);\n if (!initialStyles) {\n SpecialCasedStyles.initialStylesByElement.set(_element, initialStyles = new Map());\n }\n this._initialStyles = initialStyles;\n }\n start() {\n if (this._state < 1 /* SpecialCasedStylesState.Started */) {\n if (this._startStyles) {\n setStyles(this._element, this._startStyles, this._initialStyles);\n }\n this._state = 1 /* SpecialCasedStylesState.Started */;\n }\n }\n finish() {\n this.start();\n if (this._state < 2 /* SpecialCasedStylesState.Finished */) {\n setStyles(this._element, this._initialStyles);\n if (this._endStyles) {\n setStyles(this._element, this._endStyles);\n this._endStyles = null;\n }\n this._state = 1 /* SpecialCasedStylesState.Started */;\n }\n }\n destroy() {\n this.finish();\n if (this._state < 3 /* SpecialCasedStylesState.Destroyed */) {\n SpecialCasedStyles.initialStylesByElement.delete(this._element);\n if (this._startStyles) {\n eraseStyles(this._element, this._startStyles);\n this._endStyles = null;\n }\n if (this._endStyles) {\n eraseStyles(this._element, this._endStyles);\n this._endStyles = null;\n }\n setStyles(this._element, this._initialStyles);\n this._state = 3 /* SpecialCasedStylesState.Destroyed */;\n }\n }\n}\nfunction filterNonAnimatableStyles(styles) {\n let result = null;\n styles.forEach((val, prop) => {\n if (isNonAnimatableStyle(prop)) {\n result = result || new Map();\n result.set(prop, val);\n }\n });\n return result;\n}\nfunction isNonAnimatableStyle(prop) {\n return prop === 'display' || prop === 'position';\n}\nclass WebAnimationsPlayer {\n constructor(element, keyframes, options, _specialStyles) {\n this.element = element;\n this.keyframes = keyframes;\n this.options = options;\n this._specialStyles = _specialStyles;\n this._onDoneFns = [];\n this._onStartFns = [];\n this._onDestroyFns = [];\n this._initialized = false;\n this._finished = false;\n this._started = false;\n this._destroyed = false;\n // the following original fns are persistent copies of the _onStartFns and _onDoneFns\n // and are used to reset the fns to their original values upon reset()\n // (since the _onStartFns and _onDoneFns get deleted after they are called)\n this._originalOnDoneFns = [];\n this._originalOnStartFns = [];\n this.time = 0;\n this.parentPlayer = null;\n this.currentSnapshot = new Map();\n this._duration = options['duration'];\n this._delay = options['delay'] || 0;\n this.time = this._duration + this._delay;\n }\n _onFinish() {\n if (!this._finished) {\n this._finished = true;\n this._onDoneFns.forEach(fn => fn());\n this._onDoneFns = [];\n }\n }\n init() {\n this._buildPlayer();\n this._preparePlayerBeforeStart();\n }\n _buildPlayer() {\n if (this._initialized) return;\n this._initialized = true;\n const keyframes = this.keyframes;\n // @ts-expect-error overwriting a readonly property\n this.domPlayer = this._triggerWebAnimation(this.element, keyframes, this.options);\n this._finalKeyframe = keyframes.length ? keyframes[keyframes.length - 1] : new Map();\n const onFinish = () => this._onFinish();\n this.domPlayer.addEventListener('finish', onFinish);\n this.onDestroy(() => {\n // We must remove the `finish` event listener once an animation has completed all its\n // iterations. This action is necessary to prevent a memory leak since the listener captures\n // `this`, creating a closure that prevents `this` from being garbage collected.\n this.domPlayer.removeEventListener('finish', onFinish);\n });\n }\n _preparePlayerBeforeStart() {\n // this is required so that the player doesn't start to animate right away\n if (this._delay) {\n this._resetDomPlayerState();\n } else {\n this.domPlayer.pause();\n }\n }\n _convertKeyframesToObject(keyframes) {\n const kfs = [];\n keyframes.forEach(frame => {\n kfs.push(Object.fromEntries(frame));\n });\n return kfs;\n }\n /** @internal */\n _triggerWebAnimation(element, keyframes, options) {\n return element.animate(this._convertKeyframesToObject(keyframes), options);\n }\n onStart(fn) {\n this._originalOnStartFns.push(fn);\n this._onStartFns.push(fn);\n }\n onDone(fn) {\n this._originalOnDoneFns.push(fn);\n this._onDoneFns.push(fn);\n }\n onDestroy(fn) {\n this._onDestroyFns.push(fn);\n }\n play() {\n this._buildPlayer();\n if (!this.hasStarted()) {\n this._onStartFns.forEach(fn => fn());\n this._onStartFns = [];\n this._started = true;\n if (this._specialStyles) {\n this._specialStyles.start();\n }\n }\n this.domPlayer.play();\n }\n pause() {\n this.init();\n this.domPlayer.pause();\n }\n finish() {\n this.init();\n if (this._specialStyles) {\n this._specialStyles.finish();\n }\n this._onFinish();\n this.domPlayer.finish();\n }\n reset() {\n this._resetDomPlayerState();\n this._destroyed = false;\n this._finished = false;\n this._started = false;\n this._onStartFns = this._originalOnStartFns;\n this._onDoneFns = this._originalOnDoneFns;\n }\n _resetDomPlayerState() {\n if (this.domPlayer) {\n this.domPlayer.cancel();\n }\n }\n restart() {\n this.reset();\n this.play();\n }\n hasStarted() {\n return this._started;\n }\n destroy() {\n if (!this._destroyed) {\n this._destroyed = true;\n this._resetDomPlayerState();\n this._onFinish();\n if (this._specialStyles) {\n this._specialStyles.destroy();\n }\n this._onDestroyFns.forEach(fn => fn());\n this._onDestroyFns = [];\n }\n }\n setPosition(p) {\n if (this.domPlayer === undefined) {\n this.init();\n }\n this.domPlayer.currentTime = p * this.time;\n }\n getPosition() {\n // tsc is complaining with TS2362 without the conversion to number\n return +(this.domPlayer.currentTime ?? 0) / this.time;\n }\n get totalTime() {\n return this._delay + this._duration;\n }\n beforeDestroy() {\n const styles = new Map();\n if (this.hasStarted()) {\n // note: this code is invoked only when the `play` function was called prior to this\n // (thus `hasStarted` returns true), this implies that the code that initializes\n // `_finalKeyframe` has also been executed and the non-null assertion can be safely used here\n const finalKeyframe = this._finalKeyframe;\n finalKeyframe.forEach((val, prop) => {\n if (prop !== 'offset') {\n styles.set(prop, this._finished ? val : computeStyle(this.element, prop));\n }\n });\n }\n this.currentSnapshot = styles;\n }\n /** @internal */\n triggerCallback(phaseName) {\n const methods = phaseName === 'start' ? this._onStartFns : this._onDoneFns;\n methods.forEach(fn => fn());\n methods.length = 0;\n }\n}\nclass WebAnimationsDriver {\n validateStyleProperty(prop) {\n // Perform actual validation in dev mode only, in prod mode this check is a noop.\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n return validateStyleProperty(prop);\n }\n return true;\n }\n validateAnimatableStyleProperty(prop) {\n // Perform actual validation in dev mode only, in prod mode this check is a noop.\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n const cssProp = camelCaseToDashCase(prop);\n return validateWebAnimatableStyleProperty(cssProp);\n }\n return true;\n }\n containsElement(elm1, elm2) {\n return containsElement(elm1, elm2);\n }\n getParentElement(element) {\n return getParentElement(element);\n }\n query(element, selector, multi) {\n return invokeQuery(element, selector, multi);\n }\n computeStyle(element, prop, defaultValue) {\n return computeStyle(element, prop);\n }\n animate(element, keyframes, duration, delay, easing, previousPlayers = []) {\n const fill = delay == 0 ? 'both' : 'forwards';\n const playerOptions = {\n duration,\n delay,\n fill\n };\n // we check for this to avoid having a null|undefined value be present\n // for the easing (which results in an error for certain browsers #9752)\n if (easing) {\n playerOptions['easing'] = easing;\n }\n const previousStyles = new Map();\n const previousWebAnimationPlayers = previousPlayers.filter(player => player instanceof WebAnimationsPlayer);\n if (allowPreviousPlayerStylesMerge(duration, delay)) {\n previousWebAnimationPlayers.forEach(player => {\n player.currentSnapshot.forEach((val, prop) => previousStyles.set(prop, val));\n });\n }\n let _keyframes = normalizeKeyframes(keyframes).map(styles => new Map(styles));\n _keyframes = balancePreviousStylesIntoKeyframes(element, _keyframes, previousStyles);\n const specialStyles = packageNonAnimatableStyles(element, _keyframes);\n return new WebAnimationsPlayer(element, _keyframes, playerOptions, specialStyles);\n }\n}\nfunction createEngine(type, doc) {\n // TODO: find a way to make this tree shakable.\n if (type === 'noop') {\n return new AnimationEngine(doc, new NoopAnimationDriver(), new NoopAnimationStyleNormalizer());\n }\n return new AnimationEngine(doc, new WebAnimationsDriver(), new WebAnimationsStyleNormalizer());\n}\nclass Animation {\n constructor(_driver, input) {\n this._driver = _driver;\n const errors = [];\n const warnings = [];\n const ast = buildAnimationAst(_driver, input, errors, warnings);\n if (errors.length) {\n throw validationFailed(errors);\n }\n if (warnings.length) {\n warnValidation(warnings);\n }\n this._animationAst = ast;\n }\n buildTimelines(element, startingStyles, destinationStyles, options, subInstructions) {\n const start = Array.isArray(startingStyles) ? normalizeStyles(startingStyles) : startingStyles;\n const dest = Array.isArray(destinationStyles) ? normalizeStyles(destinationStyles) : destinationStyles;\n const errors = [];\n subInstructions = subInstructions || new ElementInstructionMap();\n const result = buildAnimationTimelines(this._driver, element, this._animationAst, ENTER_CLASSNAME, LEAVE_CLASSNAME, start, dest, options, subInstructions, errors);\n if (errors.length) {\n throw buildingFailed(errors);\n }\n return result;\n }\n}\nconst ANIMATION_PREFIX = '@';\nconst DISABLE_ANIMATIONS_FLAG = '@.disabled';\nclass BaseAnimationRenderer {\n constructor(namespaceId, delegate, engine, _onDestroy) {\n this.namespaceId = namespaceId;\n this.delegate = delegate;\n this.engine = engine;\n this._onDestroy = _onDestroy;\n // We need to explicitly type this property because of an api-extractor bug\n // See https://github.com/microsoft/rushstack/issues/4390\n this.ɵtype = 0 /* AnimationRendererType.Regular */;\n }\n get data() {\n return this.delegate.data;\n }\n destroyNode(node) {\n this.delegate.destroyNode?.(node);\n }\n destroy() {\n this.engine.destroy(this.namespaceId, this.delegate);\n this.engine.afterFlushAnimationsDone(() => {\n // Call the renderer destroy method after the animations has finished as otherwise\n // styles will be removed too early which will cause an unstyled animation.\n queueMicrotask(() => {\n this.delegate.destroy();\n });\n });\n this._onDestroy?.();\n }\n createElement(name, namespace) {\n return this.delegate.createElement(name, namespace);\n }\n createComment(value) {\n return this.delegate.createComment(value);\n }\n createText(value) {\n return this.delegate.createText(value);\n }\n appendChild(parent, newChild) {\n this.delegate.appendChild(parent, newChild);\n this.engine.onInsert(this.namespaceId, newChild, parent, false);\n }\n insertBefore(parent, newChild, refChild, isMove = true) {\n this.delegate.insertBefore(parent, newChild, refChild);\n // If `isMove` true than we should animate this insert.\n this.engine.onInsert(this.namespaceId, newChild, parent, isMove);\n }\n removeChild(parent, oldChild, isHostElement) {\n this.engine.onRemove(this.namespaceId, oldChild, this.delegate);\n }\n selectRootElement(selectorOrNode, preserveContent) {\n return this.delegate.selectRootElement(selectorOrNode, preserveContent);\n }\n parentNode(node) {\n return this.delegate.parentNode(node);\n }\n nextSibling(node) {\n return this.delegate.nextSibling(node);\n }\n setAttribute(el, name, value, namespace) {\n this.delegate.setAttribute(el, name, value, namespace);\n }\n removeAttribute(el, name, namespace) {\n this.delegate.removeAttribute(el, name, namespace);\n }\n addClass(el, name) {\n this.delegate.addClass(el, name);\n }\n removeClass(el, name) {\n this.delegate.removeClass(el, name);\n }\n setStyle(el, style, value, flags) {\n this.delegate.setStyle(el, style, value, flags);\n }\n removeStyle(el, style, flags) {\n this.delegate.removeStyle(el, style, flags);\n }\n setProperty(el, name, value) {\n if (name.charAt(0) == ANIMATION_PREFIX && name == DISABLE_ANIMATIONS_FLAG) {\n this.disableAnimations(el, !!value);\n } else {\n this.delegate.setProperty(el, name, value);\n }\n }\n setValue(node, value) {\n this.delegate.setValue(node, value);\n }\n listen(target, eventName, callback) {\n return this.delegate.listen(target, eventName, callback);\n }\n disableAnimations(element, value) {\n this.engine.disableAnimations(element, value);\n }\n}\nclass AnimationRenderer extends BaseAnimationRenderer {\n constructor(factory, namespaceId, delegate, engine, onDestroy) {\n super(namespaceId, delegate, engine, onDestroy);\n this.factory = factory;\n this.namespaceId = namespaceId;\n }\n setProperty(el, name, value) {\n if (name.charAt(0) == ANIMATION_PREFIX) {\n if (name.charAt(1) == '.' && name == DISABLE_ANIMATIONS_FLAG) {\n value = value === undefined ? true : !!value;\n this.disableAnimations(el, value);\n } else {\n this.engine.process(this.namespaceId, el, name.slice(1), value);\n }\n } else {\n this.delegate.setProperty(el, name, value);\n }\n }\n listen(target, eventName, callback) {\n if (eventName.charAt(0) == ANIMATION_PREFIX) {\n const element = resolveElementFromTarget(target);\n let name = eventName.slice(1);\n let phase = '';\n // @listener.phase is for trigger animation callbacks\n // @@listener is for animation builder callbacks\n if (name.charAt(0) != ANIMATION_PREFIX) {\n [name, phase] = parseTriggerCallbackName(name);\n }\n return this.engine.listen(this.namespaceId, element, name, phase, event => {\n const countId = event['_data'] || -1;\n this.factory.scheduleListenerCallback(countId, callback, event);\n });\n }\n return this.delegate.listen(target, eventName, callback);\n }\n}\nfunction resolveElementFromTarget(target) {\n switch (target) {\n case 'body':\n return document.body;\n case 'document':\n return document;\n case 'window':\n return window;\n default:\n return target;\n }\n}\nfunction parseTriggerCallbackName(triggerName) {\n const dotIndex = triggerName.indexOf('.');\n const trigger = triggerName.substring(0, dotIndex);\n const phase = triggerName.slice(dotIndex + 1);\n return [trigger, phase];\n}\nclass AnimationRendererFactory {\n constructor(delegate, engine, _zone) {\n this.delegate = delegate;\n this.engine = engine;\n this._zone = _zone;\n this._currentId = 0;\n this._microtaskId = 1;\n this._animationCallbacksBuffer = [];\n this._rendererCache = new Map();\n this._cdRecurDepth = 0;\n engine.onRemovalComplete = (element, delegate) => {\n // Note: if a component element has a leave animation, and a host leave animation,\n // the view engine will call `removeChild` for the parent\n // component renderer as well as for the child component renderer.\n // Therefore, we need to check if we already removed the element.\n const parentNode = delegate?.parentNode(element);\n if (parentNode) {\n delegate.removeChild(parentNode, element);\n }\n };\n }\n createRenderer(hostElement, type) {\n const EMPTY_NAMESPACE_ID = '';\n // cache the delegates to find out which cached delegate can\n // be used by which cached renderer\n const delegate = this.delegate.createRenderer(hostElement, type);\n if (!hostElement || !type?.data?.['animation']) {\n const cache = this._rendererCache;\n let renderer = cache.get(delegate);\n if (!renderer) {\n // Ensure that the renderer is removed from the cache on destroy\n // since it may contain references to detached DOM nodes.\n const onRendererDestroy = () => cache.delete(delegate);\n renderer = new BaseAnimationRenderer(EMPTY_NAMESPACE_ID, delegate, this.engine, onRendererDestroy);\n // only cache this result when the base renderer is used\n cache.set(delegate, renderer);\n }\n return renderer;\n }\n const componentId = type.id;\n const namespaceId = type.id + '-' + this._currentId;\n this._currentId++;\n this.engine.register(namespaceId, hostElement);\n const registerTrigger = trigger => {\n if (Array.isArray(trigger)) {\n trigger.forEach(registerTrigger);\n } else {\n this.engine.registerTrigger(componentId, namespaceId, hostElement, trigger.name, trigger);\n }\n };\n const animationTriggers = type.data['animation'];\n animationTriggers.forEach(registerTrigger);\n return new AnimationRenderer(this, namespaceId, delegate, this.engine);\n }\n begin() {\n this._cdRecurDepth++;\n if (this.delegate.begin) {\n this.delegate.begin();\n }\n }\n _scheduleCountTask() {\n queueMicrotask(() => {\n this._microtaskId++;\n });\n }\n /** @internal */\n scheduleListenerCallback(count, fn, data) {\n if (count >= 0 && count < this._microtaskId) {\n this._zone.run(() => fn(data));\n return;\n }\n const animationCallbacksBuffer = this._animationCallbacksBuffer;\n if (animationCallbacksBuffer.length == 0) {\n queueMicrotask(() => {\n this._zone.run(() => {\n animationCallbacksBuffer.forEach(tuple => {\n const [fn, data] = tuple;\n fn(data);\n });\n this._animationCallbacksBuffer = [];\n });\n });\n }\n animationCallbacksBuffer.push([fn, data]);\n }\n end() {\n this._cdRecurDepth--;\n // this is to prevent animations from running twice when an inner\n // component does CD when a parent component instead has inserted it\n if (this._cdRecurDepth == 0) {\n this._zone.runOutsideAngular(() => {\n this._scheduleCountTask();\n this.engine.flush(this._microtaskId);\n });\n }\n if (this.delegate.end) {\n this.delegate.end();\n }\n }\n whenRenderingDone() {\n return this.engine.whenRenderingDone();\n }\n}\n\n/**\n * @module\n * @description\n * Entry point for all animation APIs of the animation browser package.\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of this package.\n */\n\n// This file is not used to build this module. It is only used during editing\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { AnimationDriver, NoopAnimationDriver, Animation as ɵAnimation, AnimationEngine as ɵAnimationEngine, AnimationRenderer as ɵAnimationRenderer, AnimationRendererFactory as ɵAnimationRendererFactory, AnimationStyleNormalizer as ɵAnimationStyleNormalizer, BaseAnimationRenderer as ɵBaseAnimationRenderer, NoopAnimationStyleNormalizer as ɵNoopAnimationStyleNormalizer, WebAnimationsDriver as ɵWebAnimationsDriver, WebAnimationsPlayer as ɵWebAnimationsPlayer, WebAnimationsStyleNormalizer as ɵWebAnimationsStyleNormalizer, allowPreviousPlayerStylesMerge as ɵallowPreviousPlayerStylesMerge, camelCaseToDashCase as ɵcamelCaseToDashCase, containsElement as ɵcontainsElement, createEngine as ɵcreateEngine, getParentElement as ɵgetParentElement, invokeQuery as ɵinvokeQuery, normalizeKeyframes as ɵnormalizeKeyframes, validateStyleProperty as ɵvalidateStyleProperty, validateWebAnimatableStyleProperty as ɵvalidateWebAnimatableStyleProperty };\n","/**\n * @license Angular v18.1.3\n * (c) 2010-2024 Google LLC. https://angular.io/\n * License: MIT\n */\n\nimport * as i0 from '@angular/core';\nimport { Injectable, Inject, RendererFactory2, NgZone, ANIMATION_MODULE_TYPE, NgModule, ɵperformanceMarkFeature } from '@angular/core';\nexport { ANIMATION_MODULE_TYPE } from '@angular/core';\nimport { ɵDomRendererFactory2, BrowserModule } from '@angular/platform-browser';\nimport * as i1 from '@angular/animations/browser';\nimport { ɵAnimationEngine, ɵWebAnimationsStyleNormalizer, ɵAnimationRendererFactory, ɵAnimationStyleNormalizer, AnimationDriver, ɵWebAnimationsDriver, NoopAnimationDriver } from '@angular/animations/browser';\nimport { DOCUMENT } from '@angular/common';\nclass InjectableAnimationEngine extends ɵAnimationEngine {\n // The `ApplicationRef` is injected here explicitly to force the dependency ordering.\n // Since the `ApplicationRef` should be created earlier before the `AnimationEngine`, they\n // both have `ngOnDestroy` hooks and `flush()` must be called after all views are destroyed.\n constructor(doc, driver, normalizer) {\n super(doc, driver, normalizer);\n }\n ngOnDestroy() {\n this.flush();\n }\n static {\n this.ɵfac = function InjectableAnimationEngine_Factory(ɵt) {\n return new (ɵt || InjectableAnimationEngine)(i0.ɵɵinject(DOCUMENT), i0.ɵɵinject(i1.AnimationDriver), i0.ɵɵinject(i1.ɵAnimationStyleNormalizer));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: InjectableAnimationEngine,\n factory: InjectableAnimationEngine.ɵfac\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(InjectableAnimationEngine, [{\n type: Injectable\n }], () => [{\n type: Document,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: i1.AnimationDriver\n }, {\n type: i1.ɵAnimationStyleNormalizer\n }], null);\n})();\nfunction instantiateDefaultStyleNormalizer() {\n return new ɵWebAnimationsStyleNormalizer();\n}\nfunction instantiateRendererFactory(renderer, engine, zone) {\n return new ɵAnimationRendererFactory(renderer, engine, zone);\n}\nconst SHARED_ANIMATION_PROVIDERS = [{\n provide: ɵAnimationStyleNormalizer,\n useFactory: instantiateDefaultStyleNormalizer\n}, {\n provide: ɵAnimationEngine,\n useClass: InjectableAnimationEngine\n}, {\n provide: RendererFactory2,\n useFactory: instantiateRendererFactory,\n deps: [ɵDomRendererFactory2, ɵAnimationEngine, NgZone]\n}];\n/**\n * Separate providers from the actual module so that we can do a local modification in Google3 to\n * include them in the BrowserModule.\n */\nconst BROWSER_ANIMATIONS_PROVIDERS = [{\n provide: AnimationDriver,\n useFactory: () => new ɵWebAnimationsDriver()\n}, {\n provide: ANIMATION_MODULE_TYPE,\n useValue: 'BrowserAnimations'\n}, ...SHARED_ANIMATION_PROVIDERS];\n/**\n * Separate providers from the actual module so that we can do a local modification in Google3 to\n * include them in the BrowserTestingModule.\n */\nconst BROWSER_NOOP_ANIMATIONS_PROVIDERS = [{\n provide: AnimationDriver,\n useClass: NoopAnimationDriver\n}, {\n provide: ANIMATION_MODULE_TYPE,\n useValue: 'NoopAnimations'\n}, ...SHARED_ANIMATION_PROVIDERS];\n\n/**\n * Exports `BrowserModule` with additional dependency-injection providers\n * for use with animations. See [Animations](guide/animations).\n * @publicApi\n */\nclass BrowserAnimationsModule {\n /**\n * Configures the module based on the specified object.\n *\n * @param config Object used to configure the behavior of the `BrowserAnimationsModule`.\n * @see {@link BrowserAnimationsModuleConfig}\n *\n * @usageNotes\n * When registering the `BrowserAnimationsModule`, you can use the `withConfig`\n * function as follows:\n * ```\n * @NgModule({\n * imports: [BrowserAnimationsModule.withConfig(config)]\n * })\n * class MyNgModule {}\n * ```\n */\n static withConfig(config) {\n return {\n ngModule: BrowserAnimationsModule,\n providers: config.disableAnimations ? BROWSER_NOOP_ANIMATIONS_PROVIDERS : BROWSER_ANIMATIONS_PROVIDERS\n };\n }\n static {\n this.ɵfac = function BrowserAnimationsModule_Factory(ɵt) {\n return new (ɵt || BrowserAnimationsModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: BrowserAnimationsModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n providers: BROWSER_ANIMATIONS_PROVIDERS,\n imports: [BrowserModule]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(BrowserAnimationsModule, [{\n type: NgModule,\n args: [{\n exports: [BrowserModule],\n providers: BROWSER_ANIMATIONS_PROVIDERS\n }]\n }], null, null);\n})();\n/**\n * Returns the set of dependency-injection providers\n * to enable animations in an application. See [animations guide](guide/animations)\n * to learn more about animations in Angular.\n *\n * @usageNotes\n *\n * The function is useful when you want to enable animations in an application\n * bootstrapped using the `bootstrapApplication` function. In this scenario there\n * is no need to import the `BrowserAnimationsModule` NgModule at all, just add\n * providers returned by this function to the `providers` list as show below.\n *\n * ```typescript\n * bootstrapApplication(RootComponent, {\n * providers: [\n * provideAnimations()\n * ]\n * });\n * ```\n *\n * @publicApi\n */\nfunction provideAnimations() {\n ɵperformanceMarkFeature('NgEagerAnimations');\n // Return a copy to prevent changes to the original array in case any in-place\n // alterations are performed to the `provideAnimations` call results in app code.\n return [...BROWSER_ANIMATIONS_PROVIDERS];\n}\n/**\n * A null player that must be imported to allow disabling of animations.\n * @publicApi\n */\nclass NoopAnimationsModule {\n static {\n this.ɵfac = function NoopAnimationsModule_Factory(ɵt) {\n return new (ɵt || NoopAnimationsModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: NoopAnimationsModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n providers: BROWSER_NOOP_ANIMATIONS_PROVIDERS,\n imports: [BrowserModule]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(NoopAnimationsModule, [{\n type: NgModule,\n args: [{\n exports: [BrowserModule],\n providers: BROWSER_NOOP_ANIMATIONS_PROVIDERS\n }]\n }], null, null);\n})();\n/**\n * Returns the set of dependency-injection providers\n * to disable animations in an application. See [animations guide](guide/animations)\n * to learn more about animations in Angular.\n *\n * @usageNotes\n *\n * The function is useful when you want to bootstrap an application using\n * the `bootstrapApplication` function, but you need to disable animations\n * (for example, when running tests).\n *\n * ```typescript\n * bootstrapApplication(RootComponent, {\n * providers: [\n * provideNoopAnimations()\n * ]\n * });\n * ```\n *\n * @publicApi\n */\nfunction provideNoopAnimations() {\n // Return a copy to prevent changes to the original array in case any in-place\n // alterations are performed to the `provideNoopAnimations` call results in app code.\n return [...BROWSER_NOOP_ANIMATIONS_PROVIDERS];\n}\n\n/**\n * @module\n * @description\n * Entry point for all animation APIs of the animation browser package.\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of this package.\n */\n\n// This file is not used to build this module. It is only used during editing\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { BrowserAnimationsModule, NoopAnimationsModule, provideAnimations, provideNoopAnimations, InjectableAnimationEngine as ɵInjectableAnimationEngine };\n","import * as i1 from '@angular/cdk/a11y';\nimport { A11yModule } from '@angular/cdk/a11y';\nimport * as i1$1 from '@angular/cdk/overlay';\nimport { Overlay, OverlayConfig, OverlayRef, OverlayModule } from '@angular/cdk/overlay';\nimport { _getFocusedElementPierceShadowDom } from '@angular/cdk/platform';\nimport * as i3 from '@angular/cdk/portal';\nimport { BasePortalOutlet, CdkPortalOutlet, ComponentPortal, TemplatePortal, PortalModule } from '@angular/cdk/portal';\nimport { DOCUMENT } from '@angular/common';\nimport * as i0 from '@angular/core';\nimport { Component, ViewEncapsulation, ChangeDetectionStrategy, Optional, Inject, ViewChild, InjectionToken, Injector, TemplateRef, Injectable, SkipSelf, NgModule } from '@angular/core';\nimport { ESCAPE, hasModifierKey } from '@angular/cdk/keycodes';\nimport { Subject, defer, of } from 'rxjs';\nimport { Directionality } from '@angular/cdk/bidi';\nimport { startWith } from 'rxjs/operators';\n\n/** Configuration for opening a modal dialog. */\nfunction CdkDialogContainer_ng_template_0_Template(rf, ctx) {}\nclass DialogConfig {\n constructor() {\n /** The ARIA role of the dialog element. */\n this.role = 'dialog';\n /** Optional CSS class or classes applied to the overlay panel. */\n this.panelClass = '';\n /** Whether the dialog has a backdrop. */\n this.hasBackdrop = true;\n /** Optional CSS class or classes applied to the overlay backdrop. */\n this.backdropClass = '';\n /** Whether the dialog closes with the escape key or pointer events outside the panel element. */\n this.disableClose = false;\n /** Width of the dialog. */\n this.width = '';\n /** Height of the dialog. */\n this.height = '';\n /** Data being injected into the child component. */\n this.data = null;\n /** ID of the element that describes the dialog. */\n this.ariaDescribedBy = null;\n /** ID of the element that labels the dialog. */\n this.ariaLabelledBy = null;\n /** Dialog label applied via `aria-label` */\n this.ariaLabel = null;\n /** Whether this is a modal dialog. Used to set the `aria-modal` attribute. */\n this.ariaModal = true;\n /**\n * Where the dialog should focus on open.\n * @breaking-change 14.0.0 Remove boolean option from autoFocus. Use string or\n * AutoFocusTarget instead.\n */\n this.autoFocus = 'first-tabbable';\n /**\n * Whether the dialog should restore focus to the previously-focused element upon closing.\n * Has the following behavior based on the type that is passed in:\n * - `boolean` - when true, will return focus to the element that was focused before the dialog\n * was opened, otherwise won't restore focus at all.\n * - `string` - focus will be restored to the first element that matches the CSS selector.\n * - `HTMLElement` - focus will be restored to the specific element.\n */\n this.restoreFocus = true;\n /**\n * Whether the dialog should close when the user navigates backwards or forwards through browser\n * history. This does not apply to navigation via anchor element unless using URL-hash based\n * routing (`HashLocationStrategy` in the Angular router).\n */\n this.closeOnNavigation = true;\n /**\n * Whether the dialog should close when the dialog service is destroyed. This is useful if\n * another service is wrapping the dialog and is managing the destruction instead.\n */\n this.closeOnDestroy = true;\n /**\n * Whether the dialog should close when the underlying overlay is detached. This is useful if\n * another service is wrapping the dialog and is managing the destruction instead. E.g. an\n * external detachment can happen as a result of a scroll strategy triggering it or when the\n * browser location changes.\n */\n this.closeOnOverlayDetachments = true;\n }\n}\nfunction throwDialogContentAlreadyAttachedError() {\n throw Error('Attempting to attach dialog content after content is already attached');\n}\n/**\n * Internal component that wraps user-provided dialog content.\n * @docs-private\n */\nclass CdkDialogContainer extends BasePortalOutlet {\n constructor(_elementRef, _focusTrapFactory, _document, _config, _interactivityChecker, _ngZone, _overlayRef, _focusMonitor) {\n super();\n this._elementRef = _elementRef;\n this._focusTrapFactory = _focusTrapFactory;\n this._config = _config;\n this._interactivityChecker = _interactivityChecker;\n this._ngZone = _ngZone;\n this._overlayRef = _overlayRef;\n this._focusMonitor = _focusMonitor;\n /** Element that was focused before the dialog was opened. Save this to restore upon close. */\n this._elementFocusedBeforeDialogWasOpened = null;\n /**\n * Type of interaction that led to the dialog being closed. This is used to determine\n * whether the focus style will be applied when returning focus to its original location\n * after the dialog is closed.\n */\n this._closeInteractionType = null;\n /**\n * Queue of the IDs of the dialog's label element, based on their definition order. The first\n * ID will be used as the `aria-labelledby` value. We use a queue here to handle the case\n * where there are two or more titles in the DOM at a time and the first one is destroyed while\n * the rest are present.\n */\n this._ariaLabelledByQueue = [];\n /**\n * Attaches a DOM portal to the dialog container.\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 if (this._portalOutlet.hasAttached() && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throwDialogContentAlreadyAttachedError();\n }\n const result = this._portalOutlet.attachDomPortal(portal);\n this._contentAttached();\n return result;\n };\n this._document = _document;\n if (this._config.ariaLabelledBy) {\n this._ariaLabelledByQueue.push(this._config.ariaLabelledBy);\n }\n }\n _contentAttached() {\n this._initializeFocusTrap();\n this._handleBackdropClicks();\n this._captureInitialFocus();\n }\n /**\n * Can be used by child classes to customize the initial focus\n * capturing behavior (e.g. if it's tied to an animation).\n */\n _captureInitialFocus() {\n this._trapFocus();\n }\n ngOnDestroy() {\n this._restoreFocus();\n }\n /**\n * Attach a ComponentPortal as content to this dialog container.\n * @param portal Portal to be attached as the dialog content.\n */\n attachComponentPortal(portal) {\n if (this._portalOutlet.hasAttached() && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throwDialogContentAlreadyAttachedError();\n }\n const result = this._portalOutlet.attachComponentPortal(portal);\n this._contentAttached();\n return result;\n }\n /**\n * Attach a TemplatePortal as content to this dialog container.\n * @param portal Portal to be attached as the dialog content.\n */\n attachTemplatePortal(portal) {\n if (this._portalOutlet.hasAttached() && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throwDialogContentAlreadyAttachedError();\n }\n const result = this._portalOutlet.attachTemplatePortal(portal);\n this._contentAttached();\n return result;\n }\n // TODO(crisbeto): this shouldn't be exposed, but there are internal references to it.\n /** Captures focus if it isn't already inside the dialog. */\n _recaptureFocus() {\n if (!this._containsFocus()) {\n this._trapFocus();\n }\n }\n /**\n * Focuses the provided element. If the element is not focusable, it will add a tabIndex\n * attribute to forcefully focus it. The attribute is removed after focus is moved.\n * @param element The element to focus.\n */\n _forceFocus(element, options) {\n if (!this._interactivityChecker.isFocusable(element)) {\n element.tabIndex = -1;\n // The tabindex attribute should be removed to avoid navigating to that element again\n this._ngZone.runOutsideAngular(() => {\n const callback = () => {\n element.removeEventListener('blur', callback);\n element.removeEventListener('mousedown', callback);\n element.removeAttribute('tabindex');\n };\n element.addEventListener('blur', callback);\n element.addEventListener('mousedown', callback);\n });\n }\n element.focus(options);\n }\n /**\n * Focuses the first element that matches the given selector within the focus trap.\n * @param selector The CSS selector for the element to set focus to.\n */\n _focusByCssSelector(selector, options) {\n let elementToFocus = this._elementRef.nativeElement.querySelector(selector);\n if (elementToFocus) {\n this._forceFocus(elementToFocus, options);\n }\n }\n /**\n * Moves the focus inside the focus trap. When autoFocus is not set to 'dialog', if focus\n * cannot be moved then focus will go to the dialog container.\n */\n _trapFocus() {\n const element = this._elementRef.nativeElement;\n // If were to attempt to focus immediately, then the content of the dialog would not yet be\n // ready in instances where change detection has to run first. To deal with this, we simply\n // wait for the microtask queue to be empty when setting focus when autoFocus isn't set to\n // dialog. If the element inside the dialog can't be focused, then the container is focused\n // so the user can't tab into other elements behind it.\n switch (this._config.autoFocus) {\n case false:\n case 'dialog':\n // Ensure that focus is on the dialog container. It's possible that a different\n // component tried to move focus while the open animation was running. See:\n // https://github.com/angular/components/issues/16215. Note that we only want to do this\n // if the focus isn't inside the dialog already, because it's possible that the consumer\n // turned off `autoFocus` in order to move focus themselves.\n if (!this._containsFocus()) {\n element.focus();\n }\n break;\n case true:\n case 'first-tabbable':\n this._focusTrap.focusInitialElementWhenReady().then(focusedSuccessfully => {\n // If we weren't able to find a focusable element in the dialog, then focus the dialog\n // container instead.\n if (!focusedSuccessfully) {\n this._focusDialogContainer();\n }\n });\n break;\n case 'first-heading':\n this._focusByCssSelector('h1, h2, h3, h4, h5, h6, [role=\"heading\"]');\n break;\n default:\n this._focusByCssSelector(this._config.autoFocus);\n break;\n }\n }\n /** Restores focus to the element that was focused before the dialog opened. */\n _restoreFocus() {\n const focusConfig = this._config.restoreFocus;\n let focusTargetElement = null;\n if (typeof focusConfig === 'string') {\n focusTargetElement = this._document.querySelector(focusConfig);\n } else if (typeof focusConfig === 'boolean') {\n focusTargetElement = focusConfig ? this._elementFocusedBeforeDialogWasOpened : null;\n } else if (focusConfig) {\n focusTargetElement = focusConfig;\n }\n // We need the extra check, because IE can set the `activeElement` to null in some cases.\n if (this._config.restoreFocus && focusTargetElement && typeof focusTargetElement.focus === 'function') {\n const activeElement = _getFocusedElementPierceShadowDom();\n const element = this._elementRef.nativeElement;\n // Make sure that focus is still inside the dialog or is on the body (usually because a\n // non-focusable element like the backdrop was clicked) before moving it. It's possible that\n // the consumer moved it themselves before the animation was done, in which case we shouldn't\n // do anything.\n if (!activeElement || activeElement === this._document.body || activeElement === element || element.contains(activeElement)) {\n if (this._focusMonitor) {\n this._focusMonitor.focusVia(focusTargetElement, this._closeInteractionType);\n this._closeInteractionType = null;\n } else {\n focusTargetElement.focus();\n }\n }\n }\n if (this._focusTrap) {\n this._focusTrap.destroy();\n }\n }\n /** Focuses the dialog container. */\n _focusDialogContainer() {\n // Note that there is no focus method when rendering on the server.\n if (this._elementRef.nativeElement.focus) {\n this._elementRef.nativeElement.focus();\n }\n }\n /** Returns whether focus is inside the dialog. */\n _containsFocus() {\n const element = this._elementRef.nativeElement;\n const activeElement = _getFocusedElementPierceShadowDom();\n return element === activeElement || element.contains(activeElement);\n }\n /** Sets up the focus trap. */\n _initializeFocusTrap() {\n this._focusTrap = this._focusTrapFactory.create(this._elementRef.nativeElement);\n // Save the previously focused element. This element will be re-focused\n // when the dialog closes.\n if (this._document) {\n this._elementFocusedBeforeDialogWasOpened = _getFocusedElementPierceShadowDom();\n }\n }\n /** Sets up the listener that handles clicks on the dialog backdrop. */\n _handleBackdropClicks() {\n // Clicking on the backdrop will move focus out of dialog.\n // Recapture it if closing via the backdrop is disabled.\n this._overlayRef.backdropClick().subscribe(() => {\n if (this._config.disableClose) {\n this._recaptureFocus();\n }\n });\n }\n static {\n this.ɵfac = function CdkDialogContainer_Factory(ɵt) {\n return new (ɵt || CdkDialogContainer)(i0.ɵɵdirectiveInject(i0.ElementRef), i0.ɵɵdirectiveInject(i1.FocusTrapFactory), i0.ɵɵdirectiveInject(DOCUMENT, 8), i0.ɵɵdirectiveInject(DialogConfig), i0.ɵɵdirectiveInject(i1.InteractivityChecker), i0.ɵɵdirectiveInject(i0.NgZone), i0.ɵɵdirectiveInject(i1$1.OverlayRef), i0.ɵɵdirectiveInject(i1.FocusMonitor));\n };\n }\n static {\n this.ɵcmp = /* @__PURE__ */i0.ɵɵdefineComponent({\n type: CdkDialogContainer,\n selectors: [[\"cdk-dialog-container\"]],\n viewQuery: function CdkDialogContainer_Query(rf, ctx) {\n if (rf & 1) {\n i0.ɵɵviewQuery(CdkPortalOutlet, 7);\n }\n if (rf & 2) {\n let _t;\n i0.ɵɵqueryRefresh(_t = i0.ɵɵloadQuery()) && (ctx._portalOutlet = _t.first);\n }\n },\n hostAttrs: [\"tabindex\", \"-1\", 1, \"cdk-dialog-container\"],\n hostVars: 6,\n hostBindings: function CdkDialogContainer_HostBindings(rf, ctx) {\n if (rf & 2) {\n i0.ɵɵattribute(\"id\", ctx._config.id || null)(\"role\", ctx._config.role)(\"aria-modal\", ctx._config.ariaModal)(\"aria-labelledby\", ctx._config.ariaLabel ? null : ctx._ariaLabelledByQueue[0])(\"aria-label\", ctx._config.ariaLabel)(\"aria-describedby\", ctx._config.ariaDescribedBy || null);\n }\n },\n features: [i0.ɵɵInheritDefinitionFeature],\n decls: 1,\n vars: 0,\n consts: [[\"cdkPortalOutlet\", \"\"]],\n template: function CdkDialogContainer_Template(rf, ctx) {\n if (rf & 1) {\n i0.ɵɵtemplate(0, CdkDialogContainer_ng_template_0_Template, 0, 0, \"ng-template\", 0);\n }\n },\n dependencies: [i3.CdkPortalOutlet],\n styles: [\".cdk-dialog-container{display:block;width:100%;height:100%;min-height:inherit;max-height:inherit}\"],\n encapsulation: 2\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(CdkDialogContainer, [{\n type: Component,\n args: [{\n selector: 'cdk-dialog-container',\n encapsulation: ViewEncapsulation.None,\n changeDetection: ChangeDetectionStrategy.Default,\n host: {\n 'class': 'cdk-dialog-container',\n 'tabindex': '-1',\n '[attr.id]': '_config.id || null',\n '[attr.role]': '_config.role',\n '[attr.aria-modal]': '_config.ariaModal',\n '[attr.aria-labelledby]': '_config.ariaLabel ? null : _ariaLabelledByQueue[0]',\n '[attr.aria-label]': '_config.ariaLabel',\n '[attr.aria-describedby]': '_config.ariaDescribedBy || null'\n },\n template: \"\\n\",\n styles: [\".cdk-dialog-container{display:block;width:100%;height:100%;min-height:inherit;max-height:inherit}\"]\n }]\n }], function () {\n return [{\n type: i0.ElementRef\n }, {\n type: i1.FocusTrapFactory\n }, {\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [DOCUMENT]\n }]\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DialogConfig]\n }]\n }, {\n type: i1.InteractivityChecker\n }, {\n type: i0.NgZone\n }, {\n type: i1$1.OverlayRef\n }, {\n type: i1.FocusMonitor\n }];\n }, {\n _portalOutlet: [{\n type: ViewChild,\n args: [CdkPortalOutlet, {\n static: true\n }]\n }]\n });\n})();\n\n/**\n * Reference to a dialog opened via the Dialog service.\n */\nclass DialogRef {\n constructor(overlayRef, config) {\n this.overlayRef = overlayRef;\n this.config = config;\n /** Emits when the dialog has been closed. */\n this.closed = new Subject();\n this.disableClose = config.disableClose;\n this.backdropClick = overlayRef.backdropClick();\n this.keydownEvents = overlayRef.keydownEvents();\n this.outsidePointerEvents = overlayRef.outsidePointerEvents();\n this.id = config.id; // By the time the dialog is created we are guaranteed to have an ID.\n this.keydownEvents.subscribe(event => {\n if (event.keyCode === ESCAPE && !this.disableClose && !hasModifierKey(event)) {\n event.preventDefault();\n this.close(undefined, {\n focusOrigin: 'keyboard'\n });\n }\n });\n this.backdropClick.subscribe(() => {\n if (!this.disableClose) {\n this.close(undefined, {\n focusOrigin: 'mouse'\n });\n }\n });\n this._detachSubscription = overlayRef.detachments().subscribe(() => {\n // Check specifically for `false`, because we want `undefined` to be treated like `true`.\n if (config.closeOnOverlayDetachments !== false) {\n this.close();\n }\n });\n }\n /**\n * Close the dialog.\n * @param result Optional result to return to the dialog opener.\n * @param options Additional options to customize the closing behavior.\n */\n close(result, options) {\n if (this.containerInstance) {\n const closedSubject = this.closed;\n this.containerInstance._closeInteractionType = options?.focusOrigin || 'program';\n // Drop the detach subscription first since it can be triggered by the\n // `dispose` call and override the result of this closing sequence.\n this._detachSubscription.unsubscribe();\n this.overlayRef.dispose();\n closedSubject.next(result);\n closedSubject.complete();\n this.componentInstance = this.containerInstance = null;\n }\n }\n /** Updates the position of the dialog based on the current position strategy. */\n updatePosition() {\n this.overlayRef.updatePosition();\n return this;\n }\n /**\n * Updates the dialog's width and height.\n * @param width New width of the dialog.\n * @param height New height of the dialog.\n */\n updateSize(width = '', height = '') {\n this.overlayRef.updateSize({\n width,\n height\n });\n return this;\n }\n /** Add a CSS class or an array of classes to the overlay pane. */\n addPanelClass(classes) {\n this.overlayRef.addPanelClass(classes);\n return this;\n }\n /** Remove a CSS class or an array of classes from the overlay pane. */\n removePanelClass(classes) {\n this.overlayRef.removePanelClass(classes);\n return this;\n }\n}\n\n/** Injection token for the Dialog's ScrollStrategy. */\nconst DIALOG_SCROLL_STRATEGY = new InjectionToken('DialogScrollStrategy');\n/** Injection token for the Dialog's Data. */\nconst DIALOG_DATA = new InjectionToken('DialogData');\n/** Injection token that can be used to provide default options for the dialog module. */\nconst DEFAULT_DIALOG_CONFIG = new InjectionToken('DefaultDialogConfig');\n/** @docs-private */\nfunction DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay) {\n return () => overlay.scrollStrategies.block();\n}\n/** @docs-private */\nconst DIALOG_SCROLL_STRATEGY_PROVIDER = {\n provide: DIALOG_SCROLL_STRATEGY,\n deps: [Overlay],\n useFactory: DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY\n};\n\n/** Unique id for the created dialog. */\nlet uniqueId = 0;\nclass Dialog {\n /** Keeps track of the currently-open dialogs. */\n get openDialogs() {\n return this._parentDialog ? this._parentDialog.openDialogs : this._openDialogsAtThisLevel;\n }\n /** Stream that emits when a dialog has been opened. */\n get afterOpened() {\n return this._parentDialog ? this._parentDialog.afterOpened : this._afterOpenedAtThisLevel;\n }\n constructor(_overlay, _injector, _defaultOptions, _parentDialog, _overlayContainer, scrollStrategy) {\n this._overlay = _overlay;\n this._injector = _injector;\n this._defaultOptions = _defaultOptions;\n this._parentDialog = _parentDialog;\n this._overlayContainer = _overlayContainer;\n this._openDialogsAtThisLevel = [];\n this._afterAllClosedAtThisLevel = new Subject();\n this._afterOpenedAtThisLevel = new Subject();\n this._ariaHiddenElements = new Map();\n /**\n * Stream that emits when all open dialog have finished closing.\n * Will emit on subscribe if there are no open dialogs to begin with.\n */\n this.afterAllClosed = defer(() => this.openDialogs.length ? this._getAfterAllClosed() : this._getAfterAllClosed().pipe(startWith(undefined)));\n this._scrollStrategy = scrollStrategy;\n }\n open(componentOrTemplateRef, config) {\n const defaults = this._defaultOptions || new DialogConfig();\n config = {\n ...defaults,\n ...config\n };\n config.id = config.id || `cdk-dialog-${uniqueId++}`;\n if (config.id && this.getDialogById(config.id) && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw Error(`Dialog with id \"${config.id}\" exists already. The dialog id must be unique.`);\n }\n const overlayConfig = this._getOverlayConfig(config);\n const overlayRef = this._overlay.create(overlayConfig);\n const dialogRef = new DialogRef(overlayRef, config);\n const dialogContainer = this._attachContainer(overlayRef, dialogRef, config);\n dialogRef.containerInstance = dialogContainer;\n this._attachDialogContent(componentOrTemplateRef, dialogRef, dialogContainer, config);\n // If this is the first dialog that we're opening, hide all the non-overlay content.\n if (!this.openDialogs.length) {\n this._hideNonDialogContentFromAssistiveTechnology();\n }\n this.openDialogs.push(dialogRef);\n dialogRef.closed.subscribe(() => this._removeOpenDialog(dialogRef, true));\n this.afterOpened.next(dialogRef);\n return dialogRef;\n }\n /**\n * Closes all of the currently-open dialogs.\n */\n closeAll() {\n reverseForEach(this.openDialogs, dialog => dialog.close());\n }\n /**\n * Finds an open dialog by its id.\n * @param id ID to use when looking up the dialog.\n */\n getDialogById(id) {\n return this.openDialogs.find(dialog => dialog.id === id);\n }\n ngOnDestroy() {\n // Make one pass over all the dialogs that need to be untracked, but should not be closed. We\n // want to stop tracking the open dialog even if it hasn't been closed, because the tracking\n // determines when `aria-hidden` is removed from elements outside the dialog.\n reverseForEach(this._openDialogsAtThisLevel, dialog => {\n // Check for `false` specifically since we want `undefined` to be interpreted as `true`.\n if (dialog.config.closeOnDestroy === false) {\n this._removeOpenDialog(dialog, false);\n }\n });\n // Make a second pass and close the remaining dialogs. We do this second pass in order to\n // correctly dispatch the `afterAllClosed` event in case we have a mixed array of dialogs\n // that should be closed and dialogs that should not.\n reverseForEach(this._openDialogsAtThisLevel, dialog => dialog.close());\n this._afterAllClosedAtThisLevel.complete();\n this._afterOpenedAtThisLevel.complete();\n this._openDialogsAtThisLevel = [];\n }\n /**\n * Creates an overlay config from a dialog config.\n * @param config The dialog configuration.\n * @returns The overlay configuration.\n */\n _getOverlayConfig(config) {\n const state = new OverlayConfig({\n positionStrategy: config.positionStrategy || this._overlay.position().global().centerHorizontally().centerVertically(),\n scrollStrategy: config.scrollStrategy || this._scrollStrategy(),\n panelClass: config.panelClass,\n hasBackdrop: config.hasBackdrop,\n direction: config.direction,\n minWidth: config.minWidth,\n minHeight: config.minHeight,\n maxWidth: config.maxWidth,\n maxHeight: config.maxHeight,\n width: config.width,\n height: config.height,\n disposeOnNavigation: config.closeOnNavigation\n });\n if (config.backdropClass) {\n state.backdropClass = config.backdropClass;\n }\n return state;\n }\n /**\n * Attaches a dialog container to a dialog's already-created overlay.\n * @param overlay Reference to the dialog's underlying overlay.\n * @param config The dialog configuration.\n * @returns A promise resolving to a ComponentRef for the attached container.\n */\n _attachContainer(overlay, dialogRef, config) {\n const userInjector = config.injector || config.viewContainerRef?.injector;\n const providers = [{\n provide: DialogConfig,\n useValue: config\n }, {\n provide: DialogRef,\n useValue: dialogRef\n }, {\n provide: OverlayRef,\n useValue: overlay\n }];\n let containerType;\n if (config.container) {\n if (typeof config.container === 'function') {\n containerType = config.container;\n } else {\n containerType = config.container.type;\n providers.push(...config.container.providers(config));\n }\n } else {\n containerType = CdkDialogContainer;\n }\n const containerPortal = new ComponentPortal(containerType, config.viewContainerRef, Injector.create({\n parent: userInjector || this._injector,\n providers\n }), config.componentFactoryResolver);\n const containerRef = overlay.attach(containerPortal);\n return containerRef.instance;\n }\n /**\n * Attaches the user-provided component to the already-created dialog container.\n * @param componentOrTemplateRef The type of component being loaded into the dialog,\n * or a TemplateRef to instantiate as the content.\n * @param dialogRef Reference to the dialog being opened.\n * @param dialogContainer Component that is going to wrap the dialog content.\n * @param config Configuration used to open the dialog.\n */\n _attachDialogContent(componentOrTemplateRef, dialogRef, dialogContainer, config) {\n if (componentOrTemplateRef instanceof TemplateRef) {\n const injector = this._createInjector(config, dialogRef, dialogContainer, undefined);\n let context = {\n $implicit: config.data,\n dialogRef\n };\n if (config.templateContext) {\n context = {\n ...context,\n ...(typeof config.templateContext === 'function' ? config.templateContext() : config.templateContext)\n };\n }\n dialogContainer.attachTemplatePortal(new TemplatePortal(componentOrTemplateRef, null, context, injector));\n } else {\n const injector = this._createInjector(config, dialogRef, dialogContainer, this._injector);\n const contentRef = dialogContainer.attachComponentPortal(new ComponentPortal(componentOrTemplateRef, config.viewContainerRef, injector, config.componentFactoryResolver));\n dialogRef.componentRef = contentRef;\n dialogRef.componentInstance = contentRef.instance;\n }\n }\n /**\n * Creates a custom injector to be used inside the dialog. This allows a component loaded inside\n * of a dialog to close itself and, optionally, to return a value.\n * @param config Config object that is used to construct the dialog.\n * @param dialogRef Reference to the dialog being opened.\n * @param dialogContainer Component that is going to wrap the dialog content.\n * @param fallbackInjector Injector to use as a fallback when a lookup fails in the custom\n * dialog injector, if the user didn't provide a custom one.\n * @returns The custom injector that can be used inside the dialog.\n */\n _createInjector(config, dialogRef, dialogContainer, fallbackInjector) {\n const userInjector = config.injector || config.viewContainerRef?.injector;\n const providers = [{\n provide: DIALOG_DATA,\n useValue: config.data\n }, {\n provide: DialogRef,\n useValue: dialogRef\n }];\n if (config.providers) {\n if (typeof config.providers === 'function') {\n providers.push(...config.providers(dialogRef, config, dialogContainer));\n } else {\n providers.push(...config.providers);\n }\n }\n if (config.direction && (!userInjector || !userInjector.get(Directionality, null, {\n optional: true\n }))) {\n providers.push({\n provide: Directionality,\n useValue: {\n value: config.direction,\n change: of()\n }\n });\n }\n return Injector.create({\n parent: userInjector || fallbackInjector,\n providers\n });\n }\n /**\n * Removes a dialog from the array of open dialogs.\n * @param dialogRef Dialog to be removed.\n * @param emitEvent Whether to emit an event if this is the last dialog.\n */\n _removeOpenDialog(dialogRef, emitEvent) {\n const index = this.openDialogs.indexOf(dialogRef);\n if (index > -1) {\n this.openDialogs.splice(index, 1);\n // If all the dialogs were closed, remove/restore the `aria-hidden`\n // to a the siblings and emit to the `afterAllClosed` stream.\n if (!this.openDialogs.length) {\n this._ariaHiddenElements.forEach((previousValue, element) => {\n if (previousValue) {\n element.setAttribute('aria-hidden', previousValue);\n } else {\n element.removeAttribute('aria-hidden');\n }\n });\n this._ariaHiddenElements.clear();\n if (emitEvent) {\n this._getAfterAllClosed().next();\n }\n }\n }\n }\n /** Hides all of the content that isn't an overlay from assistive technology. */\n _hideNonDialogContentFromAssistiveTechnology() {\n const overlayContainer = this._overlayContainer.getContainerElement();\n // Ensure that the overlay container is attached to the DOM.\n if (overlayContainer.parentElement) {\n const siblings = overlayContainer.parentElement.children;\n for (let i = siblings.length - 1; i > -1; i--) {\n const sibling = siblings[i];\n if (sibling !== overlayContainer && sibling.nodeName !== 'SCRIPT' && sibling.nodeName !== 'STYLE' && !sibling.hasAttribute('aria-live')) {\n this._ariaHiddenElements.set(sibling, sibling.getAttribute('aria-hidden'));\n sibling.setAttribute('aria-hidden', 'true');\n }\n }\n }\n }\n _getAfterAllClosed() {\n const parent = this._parentDialog;\n return parent ? parent._getAfterAllClosed() : this._afterAllClosedAtThisLevel;\n }\n static {\n this.ɵfac = function Dialog_Factory(ɵt) {\n return new (ɵt || Dialog)(i0.ɵɵinject(i1$1.Overlay), i0.ɵɵinject(i0.Injector), i0.ɵɵinject(DEFAULT_DIALOG_CONFIG, 8), i0.ɵɵinject(Dialog, 12), i0.ɵɵinject(i1$1.OverlayContainer), i0.ɵɵinject(DIALOG_SCROLL_STRATEGY));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: Dialog,\n factory: Dialog.ɵfac\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(Dialog, [{\n type: Injectable\n }], function () {\n return [{\n type: i1$1.Overlay\n }, {\n type: i0.Injector\n }, {\n type: DialogConfig,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [DEFAULT_DIALOG_CONFIG]\n }]\n }, {\n type: Dialog,\n decorators: [{\n type: Optional\n }, {\n type: SkipSelf\n }]\n }, {\n type: i1$1.OverlayContainer\n }, {\n type: undefined,\n decorators: [{\n type: Inject,\n args: [DIALOG_SCROLL_STRATEGY]\n }]\n }];\n }, null);\n})();\n/**\n * Executes a callback against all elements in an array while iterating in reverse.\n * Useful if the array is being modified as it is being iterated.\n */\nfunction reverseForEach(items, callback) {\n let i = items.length;\n while (i--) {\n callback(items[i]);\n }\n}\nclass DialogModule {\n static {\n this.ɵfac = function DialogModule_Factory(ɵt) {\n return new (ɵt || DialogModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: DialogModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n providers: [Dialog, DIALOG_SCROLL_STRATEGY_PROVIDER],\n imports: [OverlayModule, PortalModule, A11yModule,\n // Re-export the PortalModule so that people extending the `CdkDialogContainer`\n // don't have to remember to import it or be faced with an unhelpful error.\n PortalModule]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(DialogModule, [{\n type: NgModule,\n args: [{\n imports: [OverlayModule, PortalModule, A11yModule],\n exports: [\n // Re-export the PortalModule so that people extending the `CdkDialogContainer`\n // don't have to remember to import it or be faced with an unhelpful error.\n PortalModule, CdkDialogContainer],\n declarations: [CdkDialogContainer],\n providers: [Dialog, DIALOG_SCROLL_STRATEGY_PROVIDER]\n }]\n }], null, null);\n})();\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { CdkDialogContainer, DEFAULT_DIALOG_CONFIG, DIALOG_DATA, DIALOG_SCROLL_STRATEGY, DIALOG_SCROLL_STRATEGY_PROVIDER, DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY, Dialog, DialogConfig, DialogModule, DialogRef, throwDialogContentAlreadyAttachedError };\n","import { Version } from '@angular/core';\n\n/** Current version of the Angular Component Development Kit. */\nconst VERSION = new Version('16.2.14');\nexport { VERSION };\n","import * as i0 from '@angular/core';\nimport { Version, InjectionToken, inject, NgModule, Optional, Inject, LOCALE_ID, Injectable, Directive, Input, Component, ViewEncapsulation, ChangeDetectionStrategy, EventEmitter, Output, ViewChild, ANIMATION_MODULE_TYPE as ANIMATION_MODULE_TYPE$1, NgZone, ElementRef } from '@angular/core';\nimport * as i1 from '@angular/cdk/a11y';\nimport { isFakeMousedownFromScreenReader, isFakeTouchstartFromScreenReader } from '@angular/cdk/a11y';\nimport { BidiModule } from '@angular/cdk/bidi';\nimport { VERSION as VERSION$1 } from '@angular/cdk';\nimport * as i3 from '@angular/common';\nimport { DOCUMENT, CommonModule } from '@angular/common';\nimport * as i1$1 from '@angular/cdk/platform';\nimport { Platform, _isTestEnvironment, normalizePassiveListenerOptions, _getEventTarget } from '@angular/cdk/platform';\nimport { coerceBooleanProperty, coerceNumberProperty, coerceElement } from '@angular/cdk/coercion';\nimport { Observable, Subject } from 'rxjs';\nimport { startWith } from 'rxjs/operators';\nimport { ANIMATION_MODULE_TYPE } from '@angular/platform-browser/animations';\nimport { ENTER, SPACE, hasModifierKey } from '@angular/cdk/keycodes';\n\n/** Current version of Angular Material. */\nconst _c0 = [\"*\", [[\"mat-option\"], [\"ng-container\"]]];\nconst _c1 = [\"*\", \"mat-option, ng-container\"];\nconst _c2 = [\"text\"];\nconst _c3 = [[[\"mat-icon\"]], \"*\"];\nconst _c4 = [\"mat-icon\", \"*\"];\nfunction MatOption_mat_pseudo_checkbox_0_Template(rf, ctx) {\n if (rf & 1) {\n i0.ɵɵelement(0, \"mat-pseudo-checkbox\", 6);\n }\n if (rf & 2) {\n const ctx_r0 = i0.ɵɵnextContext();\n i0.ɵɵproperty(\"disabled\", ctx_r0.disabled)(\"state\", ctx_r0.selected ? \"checked\" : \"unchecked\");\n }\n}\nfunction MatOption_mat_pseudo_checkbox_5_Template(rf, ctx) {\n if (rf & 1) {\n i0.ɵɵelement(0, \"mat-pseudo-checkbox\", 7);\n }\n if (rf & 2) {\n const ctx_r0 = i0.ɵɵnextContext();\n i0.ɵɵproperty(\"disabled\", ctx_r0.disabled);\n }\n}\nfunction MatOption_span_6_Template(rf, ctx) {\n if (rf & 1) {\n i0.ɵɵelementStart(0, \"span\", 8);\n i0.ɵɵtext(1);\n i0.ɵɵelementEnd();\n }\n if (rf & 2) {\n const ctx_r0 = i0.ɵɵnextContext();\n i0.ɵɵadvance();\n i0.ɵɵtextInterpolate1(\"(\", ctx_r0.group.label, \")\");\n }\n}\nconst VERSION = new Version('16.2.14');\n\n/** @docs-private */\nclass AnimationCurves {\n static {\n this.STANDARD_CURVE = 'cubic-bezier(0.4,0.0,0.2,1)';\n }\n static {\n this.DECELERATION_CURVE = 'cubic-bezier(0.0,0.0,0.2,1)';\n }\n static {\n this.ACCELERATION_CURVE = 'cubic-bezier(0.4,0.0,1,1)';\n }\n static {\n this.SHARP_CURVE = 'cubic-bezier(0.4,0.0,0.6,1)';\n }\n}\n/** @docs-private */\nclass AnimationDurations {\n static {\n this.COMPLEX = '375ms';\n }\n static {\n this.ENTERING = '225ms';\n }\n static {\n this.EXITING = '195ms';\n }\n}\n\n/** @docs-private */\nfunction MATERIAL_SANITY_CHECKS_FACTORY() {\n return true;\n}\n/** Injection token that configures whether the Material sanity checks are enabled. */\nconst MATERIAL_SANITY_CHECKS = new InjectionToken('mat-sanity-checks', {\n providedIn: 'root',\n factory: MATERIAL_SANITY_CHECKS_FACTORY\n});\n/**\n * Module that captures anything that should be loaded and/or run for *all* Angular Material\n * components. This includes Bidi, etc.\n *\n * This module should be imported to each top-level component module (e.g., MatTabsModule).\n */\nclass MatCommonModule {\n constructor(highContrastModeDetector, _sanityChecks, _document) {\n this._sanityChecks = _sanityChecks;\n this._document = _document;\n /** Whether we've done the global sanity checks (e.g. a theme is loaded, there is a doctype). */\n this._hasDoneGlobalChecks = false;\n // While A11yModule also does this, we repeat it here to avoid importing A11yModule\n // in MatCommonModule.\n highContrastModeDetector._applyBodyHighContrastModeCssClasses();\n if (!this._hasDoneGlobalChecks) {\n this._hasDoneGlobalChecks = true;\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n // Inject in here so the reference to `Platform` can be removed in production mode.\n const platform = inject(Platform, {\n optional: true\n });\n if (this._checkIsEnabled('doctype')) {\n _checkDoctypeIsDefined(this._document);\n }\n if (this._checkIsEnabled('theme')) {\n _checkThemeIsPresent(this._document, !!platform?.isBrowser);\n }\n if (this._checkIsEnabled('version')) {\n _checkCdkVersionMatch();\n }\n }\n }\n }\n /** Gets whether a specific sanity check is enabled. */\n _checkIsEnabled(name) {\n if (_isTestEnvironment()) {\n return false;\n }\n if (typeof this._sanityChecks === 'boolean') {\n return this._sanityChecks;\n }\n return !!this._sanityChecks[name];\n }\n static {\n this.ɵfac = function MatCommonModule_Factory(ɵt) {\n return new (ɵt || MatCommonModule)(i0.ɵɵinject(i1.HighContrastModeDetector), i0.ɵɵinject(MATERIAL_SANITY_CHECKS, 8), i0.ɵɵinject(DOCUMENT));\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: MatCommonModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n imports: [BidiModule, BidiModule]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(MatCommonModule, [{\n type: NgModule,\n args: [{\n imports: [BidiModule],\n exports: [BidiModule]\n }]\n }], function () {\n return [{\n type: i1.HighContrastModeDetector\n }, {\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [MATERIAL_SANITY_CHECKS]\n }]\n }, {\n type: Document,\n decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }]\n }];\n }, null);\n})();\n/** Checks that the page has a doctype. */\nfunction _checkDoctypeIsDefined(doc) {\n if (!doc.doctype) {\n console.warn('Current document does not have a doctype. This may cause ' + 'some Angular Material components not to behave as expected.');\n }\n}\n/** Checks that a theme has been included. */\nfunction _checkThemeIsPresent(doc, isBrowser) {\n // We need to assert that the `body` is defined, because these checks run very early\n // and the `body` won't be defined if the consumer put their scripts in the `head`.\n if (!doc.body || !isBrowser) {\n return;\n }\n const testElement = doc.createElement('div');\n testElement.classList.add('mat-theme-loaded-marker');\n doc.body.appendChild(testElement);\n const computedStyle = getComputedStyle(testElement);\n // In some situations the computed style of the test element can be null. For example in\n // Firefox, the computed style is null if an application is running inside of a hidden iframe.\n // See: https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n if (computedStyle && computedStyle.display !== 'none') {\n console.warn('Could not find Angular Material core theme. Most Material ' + 'components may not work as expected. For more info refer ' + 'to the theming guide: https://material.angular.io/guide/theming');\n }\n testElement.remove();\n}\n/** Checks whether the Material version matches the CDK version. */\nfunction _checkCdkVersionMatch() {\n if (VERSION.full !== VERSION$1.full) {\n console.warn('The Angular Material version (' + VERSION.full + ') does not match ' + 'the Angular CDK version (' + VERSION$1.full + ').\\n' + 'Please ensure the versions of these two packages exactly match.');\n }\n}\nfunction mixinDisabled(base) {\n return class extends base {\n get disabled() {\n return this._disabled;\n }\n set disabled(value) {\n this._disabled = coerceBooleanProperty(value);\n }\n constructor(...args) {\n super(...args);\n this._disabled = false;\n }\n };\n}\nfunction mixinColor(base, defaultColor) {\n return class extends base {\n get color() {\n return this._color;\n }\n set color(value) {\n const colorPalette = value || this.defaultColor;\n if (colorPalette !== this._color) {\n if (this._color) {\n this._elementRef.nativeElement.classList.remove(`mat-${this._color}`);\n }\n if (colorPalette) {\n this._elementRef.nativeElement.classList.add(`mat-${colorPalette}`);\n }\n this._color = colorPalette;\n }\n }\n constructor(...args) {\n super(...args);\n this.defaultColor = defaultColor;\n // Set the default color that can be specified from the mixin.\n this.color = defaultColor;\n }\n };\n}\nfunction mixinDisableRipple(base) {\n return class extends base {\n /** Whether the ripple effect is disabled or not. */\n get disableRipple() {\n return this._disableRipple;\n }\n set disableRipple(value) {\n this._disableRipple = coerceBooleanProperty(value);\n }\n constructor(...args) {\n super(...args);\n this._disableRipple = false;\n }\n };\n}\nfunction mixinTabIndex(base, defaultTabIndex = 0) {\n return class extends base {\n get tabIndex() {\n return this.disabled ? -1 : this._tabIndex;\n }\n set tabIndex(value) {\n // If the specified tabIndex value is null or undefined, fall back to the default value.\n this._tabIndex = value != null ? coerceNumberProperty(value) : this.defaultTabIndex;\n }\n constructor(...args) {\n super(...args);\n this._tabIndex = defaultTabIndex;\n this.defaultTabIndex = defaultTabIndex;\n }\n };\n}\nfunction mixinErrorState(base) {\n return class extends base {\n /** Updates the error state based on the provided error state matcher. */\n updateErrorState() {\n const oldState = this.errorState;\n const parent = this._parentFormGroup || this._parentForm;\n const matcher = this.errorStateMatcher || this._defaultErrorStateMatcher;\n const control = this.ngControl ? this.ngControl.control : null;\n const newState = matcher.isErrorState(control, parent);\n if (newState !== oldState) {\n this.errorState = newState;\n this.stateChanges.next();\n }\n }\n constructor(...args) {\n super(...args);\n /** Whether the component is in an error state. */\n this.errorState = false;\n }\n };\n}\n\n/** Mixin to augment a directive with an initialized property that will emits when ngOnInit ends. */\nfunction mixinInitialized(base) {\n return class extends base {\n constructor(...args) {\n super(...args);\n /** Whether this directive has been marked as initialized. */\n this._isInitialized = false;\n /**\n * List of subscribers that subscribed before the directive was initialized. Should be notified\n * during _markInitialized. Set to null after pending subscribers are notified, and should\n * not expect to be populated after.\n */\n this._pendingSubscribers = [];\n /**\n * Observable stream that emits when the directive initializes. If already initialized, the\n * subscriber is stored to be notified once _markInitialized is called.\n */\n this.initialized = new Observable(subscriber => {\n // If initialized, immediately notify the subscriber. Otherwise store the subscriber to notify\n // when _markInitialized is called.\n if (this._isInitialized) {\n this._notifySubscriber(subscriber);\n } else {\n this._pendingSubscribers.push(subscriber);\n }\n });\n }\n /**\n * Marks the state as initialized and notifies pending subscribers. Should be called at the end\n * of ngOnInit.\n * @docs-private\n */\n _markInitialized() {\n if (this._isInitialized && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw Error('This directive has already been marked as initialized and ' + 'should not be called twice.');\n }\n this._isInitialized = true;\n this._pendingSubscribers.forEach(this._notifySubscriber);\n this._pendingSubscribers = null;\n }\n /** Emits and completes the subscriber stream (should only emit once). */\n _notifySubscriber(subscriber) {\n subscriber.next();\n subscriber.complete();\n }\n };\n}\n\n/** InjectionToken for datepicker that can be used to override default locale code. */\nconst MAT_DATE_LOCALE = new InjectionToken('MAT_DATE_LOCALE', {\n providedIn: 'root',\n factory: MAT_DATE_LOCALE_FACTORY\n});\n/** @docs-private */\nfunction MAT_DATE_LOCALE_FACTORY() {\n return inject(LOCALE_ID);\n}\n/** Adapts type `D` to be usable as a date by cdk-based components that work with dates. */\nclass DateAdapter {\n constructor() {\n this._localeChanges = new Subject();\n /** A stream that emits when the locale changes. */\n this.localeChanges = this._localeChanges;\n }\n /**\n * Given a potential date object, returns that same date object if it is\n * a valid date, or `null` if it's not a valid date.\n * @param obj The object to check.\n * @returns A date or `null`.\n */\n getValidDateOrNull(obj) {\n return this.isDateInstance(obj) && this.isValid(obj) ? obj : null;\n }\n /**\n * Attempts to deserialize a value to a valid date object. This is different from parsing in that\n * deserialize should only accept non-ambiguous, locale-independent formats (e.g. a ISO 8601\n * string). The default implementation does not allow any deserialization, it simply checks that\n * the given value is already a valid date object or null. The `` will call this\n * method on all of its `@Input()` properties that accept dates. It is therefore possible to\n * support passing values from your backend directly to these properties by overriding this method\n * to also deserialize the format used by your backend.\n * @param value The value to be deserialized into a date object.\n * @returns The deserialized date object, either a valid date, null if the value can be\n * deserialized into a null date (e.g. the empty string), or an invalid date.\n */\n deserialize(value) {\n if (value == null || this.isDateInstance(value) && this.isValid(value)) {\n return value;\n }\n return this.invalid();\n }\n /**\n * Sets the locale used for all dates.\n * @param locale The new locale.\n */\n setLocale(locale) {\n this.locale = locale;\n this._localeChanges.next();\n }\n /**\n * Compares two dates.\n * @param first The first date to compare.\n * @param second The second date to compare.\n * @returns 0 if the dates are equal, a number less than 0 if the first date is earlier,\n * a number greater than 0 if the first date is later.\n */\n compareDate(first, second) {\n return this.getYear(first) - this.getYear(second) || this.getMonth(first) - this.getMonth(second) || this.getDate(first) - this.getDate(second);\n }\n /**\n * Checks if two dates are equal.\n * @param first The first date to check.\n * @param second The second date to check.\n * @returns Whether the two dates are equal.\n * Null dates are considered equal to other null dates.\n */\n sameDate(first, second) {\n if (first && second) {\n let firstValid = this.isValid(first);\n let secondValid = this.isValid(second);\n if (firstValid && secondValid) {\n return !this.compareDate(first, second);\n }\n return firstValid == secondValid;\n }\n return first == second;\n }\n /**\n * Clamp the given date between min and max dates.\n * @param date The date to clamp.\n * @param min The minimum value to allow. If null or omitted no min is enforced.\n * @param max The maximum value to allow. If null or omitted no max is enforced.\n * @returns `min` if `date` is less than `min`, `max` if date is greater than `max`,\n * otherwise `date`.\n */\n clampDate(date, min, max) {\n if (min && this.compareDate(date, min) < 0) {\n return min;\n }\n if (max && this.compareDate(date, max) > 0) {\n return max;\n }\n return date;\n }\n}\nconst MAT_DATE_FORMATS = new InjectionToken('mat-date-formats');\n\n/**\n * Matches strings that have the form of a valid RFC 3339 string\n * (https://tools.ietf.org/html/rfc3339). Note that the string may not actually be a valid date\n * because the regex will match strings an with out of bounds month, date, etc.\n */\nconst ISO_8601_REGEX = /^\\d{4}-\\d{2}-\\d{2}(?:T\\d{2}:\\d{2}:\\d{2}(?:\\.\\d+)?(?:Z|(?:(?:\\+|-)\\d{2}:\\d{2}))?)?$/;\n/** Creates an array and fills it with values. */\nfunction range(length, valueFunction) {\n const valuesArray = Array(length);\n for (let i = 0; i < length; i++) {\n valuesArray[i] = valueFunction(i);\n }\n return valuesArray;\n}\n/** Adapts the native JS Date for use with cdk-based components that work with dates. */\nclass NativeDateAdapter extends DateAdapter {\n constructor(matDateLocale,\n /**\n * @deprecated No longer being used. To be removed.\n * @breaking-change 14.0.0\n */\n _platform) {\n super();\n /**\n * @deprecated No longer being used. To be removed.\n * @breaking-change 14.0.0\n */\n this.useUtcForDisplay = false;\n super.setLocale(matDateLocale);\n }\n getYear(date) {\n return date.getFullYear();\n }\n getMonth(date) {\n return date.getMonth();\n }\n getDate(date) {\n return date.getDate();\n }\n getDayOfWeek(date) {\n return date.getDay();\n }\n getMonthNames(style) {\n const dtf = new Intl.DateTimeFormat(this.locale, {\n month: style,\n timeZone: 'utc'\n });\n return range(12, i => this._format(dtf, new Date(2017, i, 1)));\n }\n getDateNames() {\n const dtf = new Intl.DateTimeFormat(this.locale, {\n day: 'numeric',\n timeZone: 'utc'\n });\n return range(31, i => this._format(dtf, new Date(2017, 0, i + 1)));\n }\n getDayOfWeekNames(style) {\n const dtf = new Intl.DateTimeFormat(this.locale, {\n weekday: style,\n timeZone: 'utc'\n });\n return range(7, i => this._format(dtf, new Date(2017, 0, i + 1)));\n }\n getYearName(date) {\n const dtf = new Intl.DateTimeFormat(this.locale, {\n year: 'numeric',\n timeZone: 'utc'\n });\n return this._format(dtf, date);\n }\n getFirstDayOfWeek() {\n // We can't tell using native JS Date what the first day of the week is, we default to Sunday.\n return 0;\n }\n getNumDaysInMonth(date) {\n return this.getDate(this._createDateWithOverflow(this.getYear(date), this.getMonth(date) + 1, 0));\n }\n clone(date) {\n return new Date(date.getTime());\n }\n createDate(year, month, date) {\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n // Check for invalid month and date (except upper bound on date which we have to check after\n // creating the Date).\n if (month < 0 || month > 11) {\n throw Error(`Invalid month index \"${month}\". Month index has to be between 0 and 11.`);\n }\n if (date < 1) {\n throw Error(`Invalid date \"${date}\". Date has to be greater than 0.`);\n }\n }\n let result = this._createDateWithOverflow(year, month, date);\n // Check that the date wasn't above the upper bound for the month, causing the month to overflow\n if (result.getMonth() != month && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw Error(`Invalid date \"${date}\" for month with index \"${month}\".`);\n }\n return result;\n }\n today() {\n return new Date();\n }\n parse(value, parseFormat) {\n // We have no way using the native JS Date to set the parse format or locale, so we ignore these\n // parameters.\n if (typeof value == 'number') {\n return new Date(value);\n }\n return value ? new Date(Date.parse(value)) : null;\n }\n format(date, displayFormat) {\n if (!this.isValid(date)) {\n throw Error('NativeDateAdapter: Cannot format invalid date.');\n }\n const dtf = new Intl.DateTimeFormat(this.locale, {\n ...displayFormat,\n timeZone: 'utc'\n });\n return this._format(dtf, date);\n }\n addCalendarYears(date, years) {\n return this.addCalendarMonths(date, years * 12);\n }\n addCalendarMonths(date, months) {\n let newDate = this._createDateWithOverflow(this.getYear(date), this.getMonth(date) + months, this.getDate(date));\n // It's possible to wind up in the wrong month if the original month has more days than the new\n // month. In this case we want to go to the last day of the desired month.\n // Note: the additional + 12 % 12 ensures we end up with a positive number, since JS % doesn't\n // guarantee this.\n if (this.getMonth(newDate) != ((this.getMonth(date) + months) % 12 + 12) % 12) {\n newDate = this._createDateWithOverflow(this.getYear(newDate), this.getMonth(newDate), 0);\n }\n return newDate;\n }\n addCalendarDays(date, days) {\n return this._createDateWithOverflow(this.getYear(date), this.getMonth(date), this.getDate(date) + days);\n }\n toIso8601(date) {\n return [date.getUTCFullYear(), this._2digit(date.getUTCMonth() + 1), this._2digit(date.getUTCDate())].join('-');\n }\n /**\n * Returns the given value if given a valid Date or null. Deserializes valid ISO 8601 strings\n * (https://www.ietf.org/rfc/rfc3339.txt) into valid Dates and empty string into null. Returns an\n * invalid date for all other values.\n */\n deserialize(value) {\n if (typeof value === 'string') {\n if (!value) {\n return null;\n }\n // The `Date` constructor accepts formats other than ISO 8601, so we need to make sure the\n // string is the right format first.\n if (ISO_8601_REGEX.test(value)) {\n let date = new Date(value);\n if (this.isValid(date)) {\n return date;\n }\n }\n }\n return super.deserialize(value);\n }\n isDateInstance(obj) {\n return obj instanceof Date;\n }\n isValid(date) {\n return !isNaN(date.getTime());\n }\n invalid() {\n return new Date(NaN);\n }\n /** Creates a date but allows the month and date to overflow. */\n _createDateWithOverflow(year, month, date) {\n // Passing the year to the constructor causes year numbers <100 to be converted to 19xx.\n // To work around this we use `setFullYear` and `setHours` instead.\n const d = new Date();\n d.setFullYear(year, month, date);\n d.setHours(0, 0, 0, 0);\n return d;\n }\n /**\n * Pads a number to make it two digits.\n * @param n The number to pad.\n * @returns The padded number.\n */\n _2digit(n) {\n return ('00' + n).slice(-2);\n }\n /**\n * When converting Date object to string, javascript built-in functions may return wrong\n * results because it applies its internal DST rules. The DST rules around the world change\n * very frequently, and the current valid rule is not always valid in previous years though.\n * We work around this problem building a new Date object which has its internal UTC\n * representation with the local date and time.\n * @param dtf Intl.DateTimeFormat object, containing the desired string format. It must have\n * timeZone set to 'utc' to work fine.\n * @param date Date from which we want to get the string representation according to dtf\n * @returns A Date object with its UTC representation based on the passed in date info\n */\n _format(dtf, date) {\n // Passing the year to the constructor causes year numbers <100 to be converted to 19xx.\n // To work around this we use `setUTCFullYear` and `setUTCHours` instead.\n const d = new Date();\n d.setUTCFullYear(date.getFullYear(), date.getMonth(), date.getDate());\n d.setUTCHours(date.getHours(), date.getMinutes(), date.getSeconds(), date.getMilliseconds());\n return dtf.format(d);\n }\n static {\n this.ɵfac = function NativeDateAdapter_Factory(ɵt) {\n return new (ɵt || NativeDateAdapter)(i0.ɵɵinject(MAT_DATE_LOCALE, 8), i0.ɵɵinject(i1$1.Platform));\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: NativeDateAdapter,\n factory: NativeDateAdapter.ɵfac\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(NativeDateAdapter, [{\n type: Injectable\n }], function () {\n return [{\n type: undefined,\n decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [MAT_DATE_LOCALE]\n }]\n }, {\n type: i1$1.Platform\n }];\n }, null);\n})();\nconst MAT_NATIVE_DATE_FORMATS = {\n parse: {\n dateInput: null\n },\n display: {\n dateInput: {\n year: 'numeric',\n month: 'numeric',\n day: 'numeric'\n },\n monthYearLabel: {\n year: 'numeric',\n month: 'short'\n },\n dateA11yLabel: {\n year: 'numeric',\n month: 'long',\n day: 'numeric'\n },\n monthYearA11yLabel: {\n year: 'numeric',\n month: 'long'\n }\n }\n};\nclass NativeDateModule {\n static {\n this.ɵfac = function NativeDateModule_Factory(ɵt) {\n return new (ɵt || NativeDateModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: NativeDateModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n providers: [{\n provide: DateAdapter,\n useClass: NativeDateAdapter\n }]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(NativeDateModule, [{\n type: NgModule,\n args: [{\n providers: [{\n provide: DateAdapter,\n useClass: NativeDateAdapter\n }]\n }]\n }], null, null);\n})();\nclass MatNativeDateModule {\n static {\n this.ɵfac = function MatNativeDateModule_Factory(ɵt) {\n return new (ɵt || MatNativeDateModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: MatNativeDateModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n providers: [{\n provide: MAT_DATE_FORMATS,\n useValue: MAT_NATIVE_DATE_FORMATS\n }],\n imports: [NativeDateModule]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(MatNativeDateModule, [{\n type: NgModule,\n args: [{\n imports: [NativeDateModule],\n providers: [{\n provide: MAT_DATE_FORMATS,\n useValue: MAT_NATIVE_DATE_FORMATS\n }]\n }]\n }], null, null);\n})();\n\n/** Error state matcher that matches when a control is invalid and dirty. */\nclass ShowOnDirtyErrorStateMatcher {\n isErrorState(control, form) {\n return !!(control && control.invalid && (control.dirty || form && form.submitted));\n }\n static {\n this.ɵfac = function ShowOnDirtyErrorStateMatcher_Factory(ɵt) {\n return new (ɵt || ShowOnDirtyErrorStateMatcher)();\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: ShowOnDirtyErrorStateMatcher,\n factory: ShowOnDirtyErrorStateMatcher.ɵfac\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(ShowOnDirtyErrorStateMatcher, [{\n type: Injectable\n }], null, null);\n})();\n/** Provider that defines how form controls behave with regards to displaying error messages. */\nclass ErrorStateMatcher {\n isErrorState(control, form) {\n return !!(control && control.invalid && (control.touched || form && form.submitted));\n }\n static {\n this.ɵfac = function ErrorStateMatcher_Factory(ɵt) {\n return new (ɵt || ErrorStateMatcher)();\n };\n }\n static {\n this.ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: ErrorStateMatcher,\n factory: ErrorStateMatcher.ɵfac,\n providedIn: 'root'\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(ErrorStateMatcher, [{\n type: Injectable,\n args: [{\n providedIn: 'root'\n }]\n }], null, null);\n})();\n\n/**\n * Shared directive to count lines inside a text area, such as a list item.\n * Line elements can be extracted with a @ContentChildren(MatLine) query, then\n * counted by checking the query list's length.\n */\nclass MatLine {\n static {\n this.ɵfac = function MatLine_Factory(ɵt) {\n return new (ɵt || MatLine)();\n };\n }\n static {\n this.ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: MatLine,\n selectors: [[\"\", \"mat-line\", \"\"], [\"\", \"matLine\", \"\"]],\n hostAttrs: [1, \"mat-line\"]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(MatLine, [{\n type: Directive,\n args: [{\n selector: '[mat-line], [matLine]',\n host: {\n 'class': 'mat-line'\n }\n }]\n }], null, null);\n})();\n/**\n * Helper that takes a query list of lines and sets the correct class on the host.\n * @docs-private\n */\nfunction setLines(lines, element, prefix = 'mat') {\n // Note: doesn't need to unsubscribe, because `changes`\n // gets completed by Angular when the view is destroyed.\n lines.changes.pipe(startWith(lines)).subscribe(({\n length\n }) => {\n setClass(element, `${prefix}-2-line`, false);\n setClass(element, `${prefix}-3-line`, false);\n setClass(element, `${prefix}-multi-line`, false);\n if (length === 2 || length === 3) {\n setClass(element, `${prefix}-${length}-line`, true);\n } else if (length > 3) {\n setClass(element, `${prefix}-multi-line`, true);\n }\n });\n}\n/** Adds or removes a class from an element. */\nfunction setClass(element, className, isAdd) {\n element.nativeElement.classList.toggle(className, isAdd);\n}\nclass MatLineModule {\n static {\n this.ɵfac = function MatLineModule_Factory(ɵt) {\n return new (ɵt || MatLineModule)();\n };\n }\n static {\n this.ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: MatLineModule\n });\n }\n static {\n this.ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n imports: [MatCommonModule, MatCommonModule]\n });\n }\n}\n(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && i0.ɵsetClassMetadata(MatLineModule, [{\n type: NgModule,\n args: [{\n imports: [MatCommonModule],\n exports: [MatLine, MatCommonModule],\n declarations: [MatLine]\n }]\n }], null, null);\n})();\n\n/**\n * Reference to a previously launched ripple element.\n */\nclass RippleRef {\n constructor(_renderer, /** Reference to the ripple HTML element. */\n element, /** Ripple configuration used for the ripple. */\n config, /* Whether animations are forcibly disabled for ripples through CSS. */\n _animationForciblyDisabledThroughCss = false) {\n this._renderer = _renderer;\n this.element = element;\n this.config = config;\n this._animationForciblyDisabledThroughCss = _animationForciblyDisabledThroughCss;\n /** Current state of the ripple. */\n this.state = 3 /* RippleState.HIDDEN */;\n }\n /** Fades out the ripple element. */\n fadeOut() {\n this._renderer.fadeOutRipple(this);\n }\n}\n\n/** Options used to bind a passive capturing event. */\nconst passiveCapturingEventOptions$1 = normalizePassiveListenerOptions({\n passive: true,\n capture: true\n});\n/** Manages events through delegation so that as few event handlers as possible are bound. */\nclass RippleEventManager {\n constructor() {\n this._events = new Map();\n /** Event handler that is bound and which dispatches the events to the different targets. */\n this._delegateEventHandler = event => {\n const target = _getEventTarget(event);\n if (target) {\n this._events.get(event.type)?.forEach((handlers, element) => {\n if (element === target || element.contains(target)) {\n handlers.forEach(handler => handler.handleEvent(event));\n }\n });\n }\n };\n }\n /** Adds an event handler. */\n addHandler(ngZone, name, element, handler) {\n const handlersForEvent = this._events.get(name);\n if (handlersForEvent) {\n const handlersForElement = handlersForEvent.get(element);\n if (handlersForElement) {\n handlersForElement.add(handler);\n } else {\n handlersForEvent.set(element, new Set([handler]));\n }\n } else {\n this._events.set(name, new Map([[element, new Set([handler])]]));\n ngZone.runOutsideAngular(() => {\n document.addEventListener(name, this._delegateEventHandler, passiveCapturingEventOptions$1);\n });\n }\n }\n /** Removes an event handler. */\n removeHandler(name, element, handler) {\n const handlersForEvent = this._events.get(name);\n if (!handlersForEvent) {\n return;\n }\n const handlersForElement = handlersForEvent.get(element);\n if (!handlersForElement) {\n return;\n }\n handlersForElement.delete(handler);\n if (handlersForElement.size === 0) {\n handlersForEvent.delete(element);\n }\n if (handlersForEvent.size === 0) {\n this._events.delete(name);\n document.removeEventListener(name, this._delegateEventHandler, passiveCapturingEventOptions$1);\n }\n }\n}\n\n/**\n * Default ripple animation configuration for ripples without an explicit\n * animation config specified.\n */\nconst defaultRippleAnimationConfig = {\n enterDuration: 225,\n exitDuration: 150\n};\n/**\n * Timeout for ignoring mouse events. Mouse events will be temporary ignored after touch\n * events to avoid synthetic mouse events.\n */\nconst ignoreMouseEventsTimeout = 800;\n/** Options used to bind a passive capturing event. */\nconst passiveCapturingEventOptions = normalizePassiveListenerOptions({\n passive: true,\n capture: true\n});\n/** Events that signal that the pointer is down. */\nconst pointerDownEvents = ['mousedown', 'touchstart'];\n/** Events that signal that the pointer is up. */\nconst pointerUpEvents = ['mouseup', 'mouseleave', 'touchend', 'touchcancel'];\n/**\n * Helper service that performs DOM manipulations. Not intended to be used outside this module.\n * The constructor takes a reference to the ripple directive's host element and a map of DOM\n * event handlers to be installed on the element that triggers ripple animations.\n * This will eventually become a custom renderer once Angular support exists.\n * @docs-private\n */\nclass RippleRenderer {\n static {\n this._eventManager = new RippleEventManager();\n }\n constructor(_target, _ngZone, elementOrElementRef, _platform) {\n this._target = _target;\n this._ngZone = _ngZone;\n this._platform = _platform;\n /** Whether the pointer is currently down or not. */\n this._isPointerDown = false;\n /**\n * Map of currently active ripple references.\n * The ripple reference is mapped to its element event listeners.\n * The reason why `| null` is used is that event listeners are added only\n * when the condition is truthy (see the `_startFadeOutTransition` method).\n */\n this._activeRipples = new Map();\n /** Whether pointer-up event listeners have been registered. */\n this._pointerUpEventsRegistered = false;\n // Only do anything if we're on the browser.\n if (_platform.isBrowser) {\n this._containerElement = coerceElement(elementOrElementRef);\n }\n }\n /**\n * Fades in a ripple at the given coordinates.\n * @param x Coordinate within the element, along the X axis at which to start the ripple.\n * @param y Coordinate within the element, along the Y axis at which to start the ripple.\n * @param config Extra ripple options.\n */\n fadeInRipple(x, y, config = {}) {\n const containerRect = this._containerRect = this._containerRect || this._containerElement.getBoundingClientRect();\n const animationConfig = {\n ...defaultRippleAnimationConfig,\n ...config.animation\n };\n if (config.centered) {\n x = containerRect.left + containerRect.width / 2;\n y = containerRect.top + containerRect.height / 2;\n }\n const radius = config.radius || distanceToFurthestCorner(x, y, containerRect);\n const offsetX = x - containerRect.left;\n const offsetY = y - containerRect.top;\n const enterDuration = animationConfig.enterDuration;\n const ripple = document.createElement('div');\n ripple.classList.add('mat-ripple-element');\n ripple.style.left = `${offsetX - radius}px`;\n ripple.style.top = `${offsetY - radius}px`;\n ripple.style.height = `${radius * 2}px`;\n ripple.style.width = `${radius * 2}px`;\n // If a custom color has been specified, set it as inline style. If no color is\n // set, the default color will be applied through the ripple theme styles.\n if (config.color != null) {\n ripple.style.backgroundColor = config.color;\n }\n ripple.style.transitionDuration = `${enterDuration}ms`;\n this._containerElement.appendChild(ripple);\n // By default the browser does not recalculate the styles of dynamically created\n // ripple elements. This is critical to ensure that the `scale` animates properly.\n // We enforce a style recalculation by calling `getComputedStyle` and *accessing* a property.\n // See: https://gist.github.com/paulirish/5d52fb081b3570c81e3a\n const computedStyles = window.getComputedStyle(ripple);\n const userTransitionProperty = computedStyles.transitionProperty;\n const userTransitionDuration = computedStyles.transitionDuration;\n // Note: We detect whether animation is forcibly disabled through CSS (e.g. through\n // `transition: none` or `display: none`). This is technically unexpected since animations are\n // controlled through the animation config, but this exists for backwards compatibility. This\n // logic does not need to be super accurate since it covers some edge cases which can be easily\n // avoided by users.\n const animationForciblyDisabledThroughCss = userTransitionProperty === 'none' ||\n // Note: The canonical unit for serialized CSS `