\\n\\n\\n\", styles: [\"cdk-virtual-scroll-viewport{display:block;position:relative;overflow:auto;contain:strict;transform:translateZ(0);will-change:scroll-position;-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{position:absolute;top:0;left:0;height:1px;width:1px;transform-origin:0 0}[dir=rtl] .cdk-virtual-scroll-spacer{right:0;left:auto;transform-origin:100% 0}\\n\"] }]\n }], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: i0.ChangeDetectorRef }, { type: i0.NgZone }, { type: undefined, decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [VIRTUAL_SCROLL_STRATEGY]\n }] }, { type: i2.Directionality, decorators: [{\n type: Optional\n }] }, { type: ScrollDispatcher }, { type: ViewportRuler }]; }, propDecorators: { orientation: [{\n type: Input\n }], appendOnly: [{\n type: Input\n }], scrolledIndexChange: [{\n type: Output\n }], _contentWrapper: [{\n type: ViewChild,\n args: ['contentWrapper', { static: true }]\n }] } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\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 constructor(\n /** The view container to add items to. */\n _viewContainerRef, \n /** The template to use when stamping out new items. */\n _template, \n /** The set of available differs. */\n _differs, \n /** The strategy used to render items in the virtual scroll viewport. */\n _viewRepeater, \n /** 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 ngZone.run(() => this.viewChange.next(this._renderedRange));\n this._onRenderedDataChange();\n });\n this._viewport.attach(this);\n }\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 }\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\n ? (index, item) => fn(index + (this._renderedRange ? this._renderedRange.start : 0), item)\n : 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 /**\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) &&\n (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\n ? getOffset(orientation, 'end', lastNode) - getOffset(orientation, 'start', firstNode)\n : 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 }\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}\nCdkVirtualForOf.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkVirtualForOf, deps: [{ token: i0.ViewContainerRef }, { token: i0.TemplateRef }, { token: i0.IterableDiffers }, { token: _VIEW_REPEATER_STRATEGY }, { token: CdkVirtualScrollViewport, skipSelf: true }, { token: i0.NgZone }], target: i0.ɵɵFactoryTarget.Directive });\nCdkVirtualForOf.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: CdkVirtualForOf, selector: \"[cdkVirtualFor][cdkVirtualForOf]\", inputs: { cdkVirtualForOf: \"cdkVirtualForOf\", cdkVirtualForTrackBy: \"cdkVirtualForTrackBy\", cdkVirtualForTemplate: \"cdkVirtualForTemplate\", cdkVirtualForTemplateCacheSize: \"cdkVirtualForTemplateCacheSize\" }, providers: [{ provide: _VIEW_REPEATER_STRATEGY, useClass: _RecycleViewRepeaterStrategy }], ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkVirtualForOf, decorators: [{\n type: Directive,\n args: [{\n selector: '[cdkVirtualFor][cdkVirtualForOf]',\n providers: [{ provide: _VIEW_REPEATER_STRATEGY, useClass: _RecycleViewRepeaterStrategy }],\n }]\n }], ctorParameters: function () { return [{ type: i0.ViewContainerRef }, { type: i0.TemplateRef }, { type: i0.IterableDiffers }, { type: i2$1._RecycleViewRepeaterStrategy, decorators: [{\n type: Inject,\n args: [_VIEW_REPEATER_STRATEGY]\n }] }, { type: CdkVirtualScrollViewport, decorators: [{\n type: SkipSelf\n }] }, { type: i0.NgZone }]; }, propDecorators: { cdkVirtualForOf: [{\n type: Input\n }], cdkVirtualForTrackBy: [{\n type: Input\n }], cdkVirtualForTemplate: [{\n type: Input\n }], cdkVirtualForTemplateCacheSize: [{\n type: Input\n }] } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass CdkScrollableModule {\n}\nCdkScrollableModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkScrollableModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nCdkScrollableModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkScrollableModule, declarations: [CdkScrollable], exports: [CdkScrollable] });\nCdkScrollableModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkScrollableModule });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkScrollableModule, decorators: [{\n type: NgModule,\n args: [{\n exports: [CdkScrollable],\n declarations: [CdkScrollable],\n }]\n }] });\n/**\n * @docs-primary-export\n */\nclass ScrollingModule {\n}\nScrollingModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ScrollingModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nScrollingModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ScrollingModule, declarations: [CdkFixedSizeVirtualScroll, CdkVirtualForOf, CdkVirtualScrollViewport], imports: [BidiModule, PlatformModule, CdkScrollableModule], exports: [BidiModule, CdkScrollableModule, CdkFixedSizeVirtualScroll,\n CdkVirtualForOf,\n CdkVirtualScrollViewport] });\nScrollingModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ScrollingModule, imports: [[BidiModule, PlatformModule, CdkScrollableModule], BidiModule, CdkScrollableModule] });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ScrollingModule, decorators: [{\n type: NgModule,\n args: [{\n imports: [BidiModule, PlatformModule, CdkScrollableModule],\n exports: [\n BidiModule,\n CdkScrollableModule,\n CdkFixedSizeVirtualScroll,\n CdkVirtualForOf,\n CdkVirtualScrollViewport,\n ],\n declarations: [CdkFixedSizeVirtualScroll, CdkVirtualForOf, CdkVirtualScrollViewport],\n }]\n }] });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { CdkFixedSizeVirtualScroll, CdkScrollable, CdkScrollableModule, CdkVirtualForOf, CdkVirtualScrollViewport, DEFAULT_RESIZE_TIME, DEFAULT_SCROLL_TIME, FixedSizeVirtualScrollStrategy, ScrollDispatcher, ScrollingModule, VIRTUAL_SCROLL_STRATEGY, ViewportRuler, _fixedSizeVirtualScrollStrategyFactory };\n","import * as i0 from '@angular/core';\nimport { ElementRef, Directive, EventEmitter, Inject, Output, NgModule } from '@angular/core';\nimport { DOCUMENT } from '@angular/common';\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Throws an exception when attempting to attach a null portal to a host.\n * @docs-private\n */\nfunction throwNullPortalError() {\n throw Error('Must provide a portal to attach');\n}\n/**\n * Throws an exception when attempting to attach a portal to a host that is already attached.\n * @docs-private\n */\nfunction throwPortalAlreadyAttachedError() {\n throw Error('Host already has a portal attached');\n}\n/**\n * Throws an exception when attempting to attach a portal to an already-disposed host.\n * @docs-private\n */\nfunction throwPortalOutletAlreadyDisposedError() {\n throw Error('This PortalOutlet has already been disposed');\n}\n/**\n * Throws an exception when attempting to attach an unknown portal type.\n * @docs-private\n */\nfunction throwUnknownPortalTypeError() {\n throw Error('Attempting to attach an unknown Portal type. BasePortalOutlet accepts either ' +\n 'a ComponentPortal or a TemplatePortal.');\n}\n/**\n * Throws an exception when attempting to attach a portal to a null host.\n * @docs-private\n */\nfunction throwNullPortalOutletError() {\n throw Error('Attempting to attach a portal to a null PortalOutlet');\n}\n/**\n * Throws an exception when attempting to detach a portal that is not attached.\n * @docs-private\n */\nfunction throwNoPortalAttachedError() {\n throw Error('Attempting to detach a portal that is not attached to a host');\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A `Portal` is something that you want to render somewhere else.\n * It can be attach to / detached from a `PortalOutlet`.\n */\nclass Portal {\n /** Attach this portal to a host. */\n attach(host) {\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n if (host == null) {\n throwNullPortalOutletError();\n }\n if (host.hasAttached()) {\n throwPortalAlreadyAttachedError();\n }\n }\n this._attachedHost = host;\n return host.attach(this);\n }\n /** Detach this portal from its host */\n detach() {\n let host = this._attachedHost;\n if (host != null) {\n this._attachedHost = null;\n host.detach();\n }\n else if (typeof ngDevMode === 'undefined' || ngDevMode) {\n throwNoPortalAttachedError();\n }\n }\n /** Whether this portal is attached to a host. */\n get isAttached() {\n return this._attachedHost != null;\n }\n /**\n * Sets the PortalOutlet reference without performing `attach()`. This is used directly by\n * the PortalOutlet when it is performing an `attach()` or `detach()`.\n */\n setAttachedHost(host) {\n this._attachedHost = host;\n }\n}\n/**\n * A `ComponentPortal` is a portal that instantiates some Component upon attachment.\n */\nclass ComponentPortal extends Portal {\n constructor(component, viewContainerRef, injector, componentFactoryResolver) {\n super();\n this.component = component;\n this.viewContainerRef = viewContainerRef;\n this.injector = injector;\n this.componentFactoryResolver = componentFactoryResolver;\n }\n}\n/**\n * A `TemplatePortal` is a portal that represents some embedded template (TemplateRef).\n */\nclass TemplatePortal extends Portal {\n constructor(template, viewContainerRef, context) {\n super();\n this.templateRef = template;\n this.viewContainerRef = viewContainerRef;\n this.context = context;\n }\n get origin() {\n return this.templateRef.elementRef;\n }\n /**\n * Attach the portal to the provided `PortalOutlet`.\n * When a context is provided it will override the `context` property of the `TemplatePortal`\n * instance.\n */\n attach(host, context = this.context) {\n this.context = context;\n return super.attach(host);\n }\n detach() {\n this.context = undefined;\n return super.detach();\n }\n}\n/**\n * A `DomPortal` is a portal whose DOM element will be taken from its current position\n * in the DOM and moved into a portal outlet, when it is attached. On detach, the content\n * will be restored to its original position.\n */\nclass DomPortal extends Portal {\n constructor(element) {\n super();\n this.element = element instanceof ElementRef ? element.nativeElement : element;\n }\n}\n/**\n * Partial implementation of PortalOutlet that handles attaching\n * ComponentPortal and TemplatePortal.\n */\nclass BasePortalOutlet {\n constructor() {\n /** Whether this host has already been permanently disposed. */\n this._isDisposed = false;\n // @breaking-change 10.0.0 `attachDomPortal` to become a required abstract method.\n this.attachDomPortal = null;\n }\n /** Whether this host has an attached portal. */\n hasAttached() {\n return !!this._attachedPortal;\n }\n /** Attaches a portal. */\n attach(portal) {\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n if (!portal) {\n throwNullPortalError();\n }\n if (this.hasAttached()) {\n throwPortalAlreadyAttachedError();\n }\n if (this._isDisposed) {\n throwPortalOutletAlreadyDisposedError();\n }\n }\n if (portal instanceof ComponentPortal) {\n this._attachedPortal = portal;\n return this.attachComponentPortal(portal);\n }\n else if (portal instanceof TemplatePortal) {\n this._attachedPortal = portal;\n return this.attachTemplatePortal(portal);\n // @breaking-change 10.0.0 remove null check for `this.attachDomPortal`.\n }\n else if (this.attachDomPortal && portal instanceof DomPortal) {\n this._attachedPortal = portal;\n return this.attachDomPortal(portal);\n }\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n throwUnknownPortalTypeError();\n }\n }\n /** Detaches a previously attached portal. */\n detach() {\n if (this._attachedPortal) {\n this._attachedPortal.setAttachedHost(null);\n this._attachedPortal = null;\n }\n this._invokeDisposeFn();\n }\n /** Permanently dispose of this portal host. */\n dispose() {\n if (this.hasAttached()) {\n this.detach();\n }\n this._invokeDisposeFn();\n this._isDisposed = true;\n }\n /** @docs-private */\n setDisposeFn(fn) {\n this._disposeFn = fn;\n }\n _invokeDisposeFn() {\n if (this._disposeFn) {\n this._disposeFn();\n this._disposeFn = null;\n }\n }\n}\n/**\n * @deprecated Use `BasePortalOutlet` instead.\n * @breaking-change 9.0.0\n */\nclass BasePortalHost extends BasePortalOutlet {\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * A PortalOutlet for attaching portals to an arbitrary DOM element outside of the Angular\n * application context.\n */\nclass DomPortalOutlet extends BasePortalOutlet {\n constructor(\n /** Element into which the content is projected. */\n outletElement, _componentFactoryResolver, _appRef, _defaultInjector, \n /**\n * @deprecated `_document` Parameter to be made required.\n * @breaking-change 10.0.0\n */\n _document) {\n super();\n this.outletElement = outletElement;\n this._componentFactoryResolver = _componentFactoryResolver;\n this._appRef = _appRef;\n this._defaultInjector = _defaultInjector;\n /**\n * Attaches a DOM portal by transferring its content into the outlet.\n * @param portal Portal to be attached.\n * @deprecated To be turned into a method.\n * @breaking-change 10.0.0\n */\n this.attachDomPortal = (portal) => {\n // @breaking-change 10.0.0 Remove check and error once the\n // `_document` constructor parameter is required.\n if (!this._document && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw Error('Cannot attach DOM portal without _document constructor parameter');\n }\n const element = portal.element;\n if (!element.parentNode && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw Error('DOM portal content must be attached to a parent node.');\n }\n // Anchor used to save the element's previous position so\n // that we can restore it when the portal is detached.\n const anchorNode = this._document.createComment('dom-portal');\n element.parentNode.insertBefore(anchorNode, element);\n this.outletElement.appendChild(element);\n this._attachedPortal = portal;\n super.setDisposeFn(() => {\n // We can't use `replaceWith` here because IE doesn't support it.\n if (anchorNode.parentNode) {\n anchorNode.parentNode.replaceChild(element, anchorNode);\n }\n });\n };\n this._document = _document;\n }\n /**\n * Attach the given ComponentPortal to DOM element using the ComponentFactoryResolver.\n * @param portal Portal to be attached\n * @returns Reference to the created component.\n */\n attachComponentPortal(portal) {\n const resolver = portal.componentFactoryResolver || this._componentFactoryResolver;\n const componentFactory = resolver.resolveComponentFactory(portal.component);\n let componentRef;\n // If the portal specifies a ViewContainerRef, we will use that as the attachment point\n // for the component (in terms of Angular's component tree, not rendering).\n // When the ViewContainerRef is missing, we use the factory to create the component directly\n // and then manually attach the view to the application.\n if (portal.viewContainerRef) {\n componentRef = portal.viewContainerRef.createComponent(componentFactory, portal.viewContainerRef.length, portal.injector || portal.viewContainerRef.injector);\n this.setDisposeFn(() => componentRef.destroy());\n }\n else {\n componentRef = componentFactory.create(portal.injector || this._defaultInjector);\n this._appRef.attachView(componentRef.hostView);\n this.setDisposeFn(() => {\n this._appRef.detachView(componentRef.hostView);\n componentRef.destroy();\n });\n }\n // At this point the component has been instantiated, so we move it to the location in the DOM\n // where we want it to be rendered.\n this.outletElement.appendChild(this._getComponentRootNode(componentRef));\n this._attachedPortal = portal;\n return componentRef;\n }\n /**\n * Attaches a template portal to the DOM as an embedded view.\n * @param portal Portal to be attached.\n * @returns Reference to the created embedded view.\n */\n attachTemplatePortal(portal) {\n let viewContainer = portal.viewContainerRef;\n let viewRef = viewContainer.createEmbeddedView(portal.templateRef, portal.context);\n // The method `createEmbeddedView` will add the view as a child of the viewContainer.\n // But for the DomPortalOutlet the view can be added everywhere in the DOM\n // (e.g Overlay Container) To move the view to the specified host element. We just\n // re-append the existing root nodes.\n viewRef.rootNodes.forEach(rootNode => this.outletElement.appendChild(rootNode));\n // Note that we want to detect changes after the nodes have been moved so that\n // any directives inside the portal that are looking at the DOM inside a lifecycle\n // hook won't be invoked too early.\n viewRef.detectChanges();\n this.setDisposeFn(() => {\n let index = viewContainer.indexOf(viewRef);\n if (index !== -1) {\n viewContainer.remove(index);\n }\n });\n this._attachedPortal = portal;\n // TODO(jelbourn): Return locals from view.\n return viewRef;\n }\n /**\n * Clears out a portal from the DOM.\n */\n dispose() {\n super.dispose();\n this.outletElement.remove();\n }\n /** Gets the root HTMLElement for an instantiated component. */\n _getComponentRootNode(componentRef) {\n return componentRef.hostView.rootNodes[0];\n }\n}\n/**\n * @deprecated Use `DomPortalOutlet` instead.\n * @breaking-change 9.0.0\n */\nclass DomPortalHost extends DomPortalOutlet {\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Directive version of a `TemplatePortal`. Because the directive *is* a TemplatePortal,\n * the directive instance itself can be attached to a host, enabling declarative use of portals.\n */\nclass CdkPortal extends TemplatePortal {\n constructor(templateRef, viewContainerRef) {\n super(templateRef, viewContainerRef);\n }\n}\nCdkPortal.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkPortal, deps: [{ token: i0.TemplateRef }, { token: i0.ViewContainerRef }], target: i0.ɵɵFactoryTarget.Directive });\nCdkPortal.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: CdkPortal, selector: \"[cdkPortal]\", exportAs: [\"cdkPortal\"], usesInheritance: true, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkPortal, decorators: [{\n type: Directive,\n args: [{\n selector: '[cdkPortal]',\n exportAs: 'cdkPortal',\n }]\n }], ctorParameters: function () { return [{ type: i0.TemplateRef }, { type: i0.ViewContainerRef }]; } });\n/**\n * @deprecated Use `CdkPortal` instead.\n * @breaking-change 9.0.0\n */\nclass TemplatePortalDirective extends CdkPortal {\n}\nTemplatePortalDirective.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: TemplatePortalDirective, deps: null, target: i0.ɵɵFactoryTarget.Directive });\nTemplatePortalDirective.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: TemplatePortalDirective, selector: \"[cdk-portal], [portal]\", providers: [\n {\n provide: CdkPortal,\n useExisting: TemplatePortalDirective,\n },\n ], exportAs: [\"cdkPortal\"], usesInheritance: true, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: TemplatePortalDirective, decorators: [{\n type: Directive,\n args: [{\n selector: '[cdk-portal], [portal]',\n exportAs: 'cdkPortal',\n providers: [\n {\n provide: CdkPortal,\n useExisting: TemplatePortalDirective,\n },\n ],\n }]\n }] });\n/**\n * Directive version of a PortalOutlet. Because the directive *is* a PortalOutlet, portals can be\n * directly attached to it, enabling declarative use.\n *\n * Usage:\n * ``\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;\n }\n /** Component or view reference that is attached to the portal. */\n get attachedRef() {\n return this._attachedRef;\n }\n ngOnInit() {\n this._isInitialized = true;\n }\n ngOnDestroy() {\n super.dispose();\n this._attachedPortal = null;\n this._attachedRef = null;\n }\n /**\n * Attach the given ComponentPortal to this PortalOutlet using the ComponentFactoryResolver.\n *\n * @param portal Portal to be attached to the portal outlet.\n * @returns Reference to the created component.\n */\n attachComponentPortal(portal) {\n portal.setAttachedHost(this);\n // If the portal specifies an origin, use that as the logical location of the component\n // in the application tree. Otherwise use the location of this PortalOutlet.\n const viewContainerRef = portal.viewContainerRef != null ? portal.viewContainerRef : this._viewContainerRef;\n const resolver = portal.componentFactoryResolver || this._componentFactoryResolver;\n const componentFactory = resolver.resolveComponentFactory(portal.component);\n const ref = viewContainerRef.createComponent(componentFactory, viewContainerRef.length, portal.injector || viewContainerRef.injector);\n // If we're using a view container that's different from the injected one (e.g. when the portal\n // specifies its own) we need to move the component into the outlet, otherwise it'll be rendered\n // inside of the alternate view container.\n if (viewContainerRef !== this._viewContainerRef) {\n this._getRootNode().appendChild(ref.hostView.rootNodes[0]);\n }\n super.setDisposeFn(() => ref.destroy());\n this._attachedPortal = portal;\n this._attachedRef = ref;\n this.attached.emit(ref);\n return ref;\n }\n /**\n * Attach the given TemplatePortal to this PortalHost as an embedded View.\n * @param portal Portal to be attached.\n * @returns Reference to the created embedded view.\n */\n attachTemplatePortal(portal) {\n portal.setAttachedHost(this);\n const viewRef = this._viewContainerRef.createEmbeddedView(portal.templateRef, portal.context);\n super.setDisposeFn(() => this._viewContainerRef.clear());\n this._attachedPortal = portal;\n this._attachedRef = viewRef;\n this.attached.emit(viewRef);\n return viewRef;\n }\n /** Gets the root node of the portal outlet. */\n _getRootNode() {\n const nativeElement = this._viewContainerRef.element.nativeElement;\n // The directive could be set on a template which will result in a comment\n // node being the root. Use the comment's parent node if that is the case.\n return (nativeElement.nodeType === nativeElement.ELEMENT_NODE\n ? nativeElement\n : nativeElement.parentNode);\n }\n}\nCdkPortalOutlet.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkPortalOutlet, deps: [{ token: i0.ComponentFactoryResolver }, { token: i0.ViewContainerRef }, { token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Directive });\nCdkPortalOutlet.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: CdkPortalOutlet, selector: \"[cdkPortalOutlet]\", inputs: { portal: [\"cdkPortalOutlet\", \"portal\"] }, outputs: { attached: \"attached\" }, exportAs: [\"cdkPortalOutlet\"], usesInheritance: true, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkPortalOutlet, decorators: [{\n type: Directive,\n args: [{\n selector: '[cdkPortalOutlet]',\n exportAs: 'cdkPortalOutlet',\n inputs: ['portal: cdkPortalOutlet'],\n }]\n }], ctorParameters: function () { return [{ type: i0.ComponentFactoryResolver }, { type: i0.ViewContainerRef }, { type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }]; }, propDecorators: { attached: [{\n type: Output\n }] } });\n/**\n * @deprecated Use `CdkPortalOutlet` instead.\n * @breaking-change 9.0.0\n */\nclass PortalHostDirective extends CdkPortalOutlet {\n}\nPortalHostDirective.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: PortalHostDirective, deps: null, target: i0.ɵɵFactoryTarget.Directive });\nPortalHostDirective.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: PortalHostDirective, selector: \"[cdkPortalHost], [portalHost]\", inputs: { portal: [\"cdkPortalHost\", \"portal\"] }, providers: [\n {\n provide: CdkPortalOutlet,\n useExisting: PortalHostDirective,\n },\n ], exportAs: [\"cdkPortalHost\"], usesInheritance: true, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: PortalHostDirective, decorators: [{\n type: Directive,\n args: [{\n selector: '[cdkPortalHost], [portalHost]',\n exportAs: 'cdkPortalHost',\n inputs: ['portal: cdkPortalHost'],\n providers: [\n {\n provide: CdkPortalOutlet,\n useExisting: PortalHostDirective,\n },\n ],\n }]\n }] });\nclass PortalModule {\n}\nPortalModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: PortalModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nPortalModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: PortalModule, declarations: [CdkPortal, CdkPortalOutlet, TemplatePortalDirective, PortalHostDirective], exports: [CdkPortal, CdkPortalOutlet, TemplatePortalDirective, PortalHostDirective] });\nPortalModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: PortalModule });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: PortalModule, decorators: [{\n type: NgModule,\n args: [{\n exports: [CdkPortal, CdkPortalOutlet, TemplatePortalDirective, PortalHostDirective],\n declarations: [CdkPortal, CdkPortalOutlet, TemplatePortalDirective, PortalHostDirective],\n }]\n }] });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Custom injector to be used when providing custom\n * injection tokens to components inside a portal.\n * @docs-private\n * @deprecated Use `Injector.create` instead.\n * @breaking-change 11.0.0\n */\nclass PortalInjector {\n constructor(_parentInjector, _customTokens) {\n this._parentInjector = _parentInjector;\n this._customTokens = _customTokens;\n }\n get(token, notFoundValue) {\n const value = this._customTokens.get(token);\n if (typeof value !== 'undefined') {\n return value;\n }\n return this._parentInjector.get(token, notFoundValue);\n }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { BasePortalHost, BasePortalOutlet, CdkPortal, CdkPortalOutlet, ComponentPortal, DomPortal, DomPortalHost, DomPortalOutlet, Portal, PortalHostDirective, PortalInjector, PortalModule, TemplatePortal, TemplatePortalDirective };\n","import * as i1 from '@angular/cdk/scrolling';\nimport { ScrollingModule } from '@angular/cdk/scrolling';\nexport { CdkScrollable, ScrollDispatcher, ViewportRuler } from '@angular/cdk/scrolling';\nimport * as i6 from '@angular/common';\nimport { DOCUMENT } from '@angular/common';\nimport * as i0 from '@angular/core';\nimport { Injectable, Inject, Optional, ElementRef, ApplicationRef, 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 { __decorate, __param, __metadata } from 'tslib';\nimport * as i5 from '@angular/cdk/bidi';\nimport { BidiModule } from '@angular/cdk/bidi';\nimport { DomPortalOutlet, TemplatePortal, PortalModule } from '@angular/cdk/portal';\nimport { Subject, Subscription, merge } from 'rxjs';\nimport { take, takeUntil, takeWhile } from 'rxjs/operators';\nimport { ESCAPE, hasModifierKey } from '@angular/cdk/keycodes';\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst scrollBehaviorSupported = supportsScrollBehavior();\n/**\n * Strategy that will prevent the user from scrolling while the overlay is visible.\n */\nclass BlockScrollStrategy {\n constructor(_viewportRuler, document) {\n this._viewportRuler = _viewportRuler;\n this._previousHTMLStyles = { top: '', left: '' };\n this._isEnabled = false;\n this._document = document;\n }\n /** Attaches this scroll strategy to an overlay. */\n attach() { }\n /** Blocks page-level scroll while the attached overlay is open. */\n enable() {\n if (this._canBeEnabled()) {\n const root = this._document.documentElement;\n this._previousScrollPosition = this._viewportRuler.getViewportScrollPosition();\n // Cache the previous inline styles in case the user had set them.\n this._previousHTMLStyles.left = root.style.left || '';\n this._previousHTMLStyles.top = root.style.top || '';\n // Note: we're using the `html` node, instead of the `body`, because the `body` may\n // have the user agent margin, whereas the `html` is guaranteed not to have one.\n root.style.left = coerceCssPixelValue(-this._previousScrollPosition.left);\n root.style.top = coerceCssPixelValue(-this._previousScrollPosition.top);\n root.classList.add('cdk-global-scrollblock');\n this._isEnabled = true;\n }\n }\n /** Unblocks page-level scroll while the attached overlay is open. */\n disable() {\n if (this._isEnabled) {\n const html = this._document.documentElement;\n const body = this._document.body;\n const htmlStyle = html.style;\n const bodyStyle = body.style;\n const previousHtmlScrollBehavior = htmlStyle.scrollBehavior || '';\n const previousBodyScrollBehavior = bodyStyle.scrollBehavior || '';\n this._isEnabled = false;\n htmlStyle.left = this._previousHTMLStyles.left;\n htmlStyle.top = this._previousHTMLStyles.top;\n html.classList.remove('cdk-global-scrollblock');\n // Disable user-defined smooth scrolling temporarily while we restore the scroll position.\n // See https://developer.mozilla.org/en-US/docs/Web/CSS/scroll-behavior\n // Note that we don't mutate the property if the browser doesn't support `scroll-behavior`,\n // because it can throw off feature detections in `supportsScrollBehavior` which\n // checks for `'scrollBehavior' in documentElement.style`.\n if (scrollBehaviorSupported) {\n htmlStyle.scrollBehavior = bodyStyle.scrollBehavior = 'auto';\n }\n window.scroll(this._previousScrollPosition.left, this._previousScrollPosition.top);\n if (scrollBehaviorSupported) {\n htmlStyle.scrollBehavior = previousHtmlScrollBehavior;\n bodyStyle.scrollBehavior = previousBodyScrollBehavior;\n }\n }\n }\n _canBeEnabled() {\n // Since the scroll strategies can't be singletons, we have to use a global CSS class\n // (`cdk-global-scrollblock`) to make sure that we don't try to disable global\n // scrolling multiple times.\n const html = this._document.documentElement;\n if (html.classList.contains('cdk-global-scrollblock') || this._isEnabled) {\n return false;\n }\n const body = this._document.body;\n const viewport = this._viewportRuler.getViewportSize();\n return body.scrollHeight > viewport.height || body.scrollWidth > viewport.width;\n }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Returns an error to be thrown when attempting to attach an already-attached scroll strategy.\n */\nfunction getMatScrollStrategyAlreadyAttachedError() {\n return Error(`Scroll strategy has already been attached.`);\n}\n\n/**\n * Strategy that will close the overlay as soon as the user starts scrolling.\n */\nclass CloseScrollStrategy {\n constructor(_scrollDispatcher, _ngZone, _viewportRuler, _config) {\n this._scrollDispatcher = _scrollDispatcher;\n this._ngZone = _ngZone;\n this._viewportRuler = _viewportRuler;\n this._config = _config;\n this._scrollSubscription = null;\n /** Detaches the overlay ref and disables the scroll strategy. */\n this._detach = () => {\n this.disable();\n if (this._overlayRef.hasAttached()) {\n this._ngZone.run(() => this._overlayRef.detach());\n }\n };\n }\n /** Attaches this scroll strategy to an overlay. */\n attach(overlayRef) {\n if (this._overlayRef && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw getMatScrollStrategyAlreadyAttachedError();\n }\n this._overlayRef = overlayRef;\n }\n /** Enables the closing of the attached overlay on scroll. */\n enable() {\n if (this._scrollSubscription) {\n return;\n }\n const stream = this._scrollDispatcher.scrolled(0);\n if (this._config && this._config.threshold && this._config.threshold > 1) {\n this._initialScrollPosition = this._viewportRuler.getViewportScrollPosition().top;\n this._scrollSubscription = stream.subscribe(() => {\n const scrollPosition = this._viewportRuler.getViewportScrollPosition().top;\n if (Math.abs(scrollPosition - this._initialScrollPosition) > this._config.threshold) {\n this._detach();\n }\n else {\n this._overlayRef.updatePosition();\n }\n });\n }\n else {\n this._scrollSubscription = stream.subscribe(this._detach);\n }\n }\n /** Disables the closing the attached overlay on scroll. */\n disable() {\n if (this._scrollSubscription) {\n this._scrollSubscription.unsubscribe();\n this._scrollSubscription = null;\n }\n }\n detach() {\n this.disable();\n this._overlayRef = null;\n }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** Scroll strategy that doesn't do anything. */\nclass NoopScrollStrategy {\n /** Does nothing, as this scroll strategy is a no-op. */\n enable() { }\n /** Does nothing, as this scroll strategy is a no-op. */\n disable() { }\n /** Does nothing, as this scroll strategy is a no-op. */\n attach() { }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Gets whether an element is scrolled outside of view by any of its parent scrolling containers.\n * @param element Dimensions of the element (from getBoundingClientRect)\n * @param scrollContainers Dimensions of element's scrolling containers (from getBoundingClientRect)\n * @returns Whether the element is scrolled out of view\n * @docs-private\n */\nfunction isElementScrolledOutsideView(element, scrollContainers) {\n return scrollContainers.some(containerBounds => {\n const outsideAbove = element.bottom < containerBounds.top;\n const outsideBelow = element.top > containerBounds.bottom;\n const outsideLeft = element.right < containerBounds.left;\n const outsideRight = element.left > containerBounds.right;\n return outsideAbove || outsideBelow || outsideLeft || outsideRight;\n });\n}\n/**\n * Gets whether an element is clipped by any of its scrolling containers.\n * @param element Dimensions of the element (from getBoundingClientRect)\n * @param scrollContainers Dimensions of element's scrolling containers (from getBoundingClientRect)\n * @returns Whether the element is clipped\n * @docs-private\n */\nfunction isElementClippedByScrolling(element, scrollContainers) {\n return scrollContainers.some(scrollContainerRect => {\n const clippedAbove = element.top < scrollContainerRect.top;\n const clippedBelow = element.bottom > scrollContainerRect.bottom;\n const clippedLeft = element.left < scrollContainerRect.left;\n const clippedRight = element.right > scrollContainerRect.right;\n return clippedAbove || clippedBelow || clippedLeft || clippedRight;\n });\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Strategy that will update the element position as the user is scrolling.\n */\nclass RepositionScrollStrategy {\n constructor(_scrollDispatcher, _viewportRuler, _ngZone, _config) {\n this._scrollDispatcher = _scrollDispatcher;\n this._viewportRuler = _viewportRuler;\n this._ngZone = _ngZone;\n this._config = _config;\n this._scrollSubscription = null;\n }\n /** Attaches this scroll strategy to an overlay. */\n attach(overlayRef) {\n if (this._overlayRef && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw getMatScrollStrategyAlreadyAttachedError();\n }\n this._overlayRef = overlayRef;\n }\n /** Enables repositioning of the attached overlay on scroll. */\n enable() {\n if (!this._scrollSubscription) {\n const throttle = this._config ? this._config.scrollThrottle : 0;\n this._scrollSubscription = this._scrollDispatcher.scrolled(throttle).subscribe(() => {\n this._overlayRef.updatePosition();\n // TODO(crisbeto): make `close` on by default once all components can handle it.\n if (this._config && this._config.autoClose) {\n const overlayRect = this._overlayRef.overlayElement.getBoundingClientRect();\n const { width, height } = this._viewportRuler.getViewportSize();\n // TODO(crisbeto): include all ancestor scroll containers here once\n // we have a way of exposing the trigger element to the scroll strategy.\n const parentRects = [{ width, height, bottom: height, right: width, top: 0, left: 0 }];\n if (isElementScrolledOutsideView(overlayRect, parentRects)) {\n this.disable();\n this._ngZone.run(() => this._overlayRef.detach());\n }\n }\n });\n }\n }\n /** Disables repositioning of the attached overlay on scroll. */\n disable() {\n if (this._scrollSubscription) {\n this._scrollSubscription.unsubscribe();\n this._scrollSubscription = null;\n }\n }\n detach() {\n this.disable();\n this._overlayRef = null;\n }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Options for how an overlay will handle scrolling.\n *\n * Users can provide a custom value for `ScrollStrategyOptions` to replace the default\n * behaviors. This class primarily acts as a factory for ScrollStrategy instances.\n */\nclass ScrollStrategyOptions {\n constructor(_scrollDispatcher, _viewportRuler, _ngZone, document) {\n this._scrollDispatcher = _scrollDispatcher;\n this._viewportRuler = _viewportRuler;\n this._ngZone = _ngZone;\n /** Do nothing on scroll. */\n this.noop = () => new NoopScrollStrategy();\n /**\n * Close the overlay as soon as the user scrolls.\n * @param config Configuration to be used inside the scroll strategy.\n */\n this.close = (config) => new CloseScrollStrategy(this._scrollDispatcher, this._ngZone, this._viewportRuler, config);\n /** Block scrolling. */\n this.block = () => new BlockScrollStrategy(this._viewportRuler, this._document);\n /**\n * Update the overlay's position on scroll.\n * @param config Configuration to be used inside the scroll strategy.\n * Allows debouncing the reposition calls.\n */\n this.reposition = (config) => new RepositionScrollStrategy(this._scrollDispatcher, this._viewportRuler, this._ngZone, config);\n this._document = document;\n }\n}\nScrollStrategyOptions.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ScrollStrategyOptions, deps: [{ token: i1.ScrollDispatcher }, { token: i1.ViewportRuler }, { token: i0.NgZone }, { token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });\nScrollStrategyOptions.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ScrollStrategyOptions, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ScrollStrategyOptions, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: i1.ScrollDispatcher }, { type: i1.ViewportRuler }, { type: i0.NgZone }, { type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** Initial configuration used when creating an overlay. */\nclass OverlayConfig {\n constructor(config) {\n /** Strategy to be used when handling scroll events while the overlay is open. */\n this.scrollStrategy = new NoopScrollStrategy();\n /** Custom class to add to the overlay pane. */\n this.panelClass = '';\n /** Whether the overlay has a backdrop. */\n this.hasBackdrop = false;\n /** Custom class to add to the backdrop */\n this.backdropClass = 'cdk-overlay-dark-backdrop';\n /**\n * Whether the overlay should be disposed of when the user goes backwards/forwards in history.\n * Note that this usually doesn't include clicking on links (unless the user is using\n * the `HashLocationStrategy`).\n */\n this.disposeOnNavigation = false;\n if (config) {\n // Use `Iterable` instead of `Array` because TypeScript, as of 3.6.3,\n // loses the array generic type in the `for of`. But we *also* have to use `Array` because\n // typescript won't iterate over an `Iterable` unless you compile with `--downlevelIteration`\n const configKeys = Object.keys(config);\n for (const key of configKeys) {\n if (config[key] !== undefined) {\n // TypeScript, as of version 3.5, sees the left-hand-side of this expression\n // as \"I don't know *which* key this is, so the only valid value is the intersection\n // of all the posible values.\" In this case, that happens to be `undefined`. TypeScript\n // is not smart enough to see that the right-hand-side is actually an access of the same\n // exact type with the same exact key, meaning that the value type must be identical.\n // So we use `any` to work around this.\n this[key] = config[key];\n }\n }\n }\n }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** The points of the origin element and the overlay element to connect. */\nclass ConnectionPositionPair {\n constructor(origin, overlay, \n /** Offset along the X axis. */\n offsetX, \n /** Offset along the Y axis. */\n offsetY, \n /** Class(es) to be applied to the panel while this position is active. */\n panelClass) {\n this.offsetX = offsetX;\n this.offsetY = offsetY;\n this.panelClass = panelClass;\n this.originX = origin.originX;\n this.originY = origin.originY;\n this.overlayX = overlay.overlayX;\n this.overlayY = overlay.overlayY;\n }\n}\n/**\n * Set of properties regarding the position of the origin and overlay relative to the viewport\n * with respect to the containing Scrollable elements.\n *\n * The overlay and origin are clipped if any part of their bounding client rectangle exceeds the\n * bounds of any one of the strategy's Scrollable's bounding client rectangle.\n *\n * The overlay and origin are outside view if there is no overlap between their bounding client\n * rectangle and any one of the strategy's Scrollable's bounding client rectangle.\n *\n * ----------- -----------\n * | outside | | clipped |\n * | view | --------------------------\n * | | | | | |\n * ---------- | ----------- |\n * -------------------------- | |\n * | | | Scrollable |\n * | | | |\n * | | --------------------------\n * | Scrollable |\n * | |\n * --------------------------\n *\n * @docs-private\n */\nclass ScrollingVisibility {\n}\n/** The change event emitted by the strategy when a fallback position is used. */\nlet ConnectedOverlayPositionChange = class ConnectedOverlayPositionChange {\n constructor(\n /** The position used as a result of this change. */\n connectionPair, \n /** @docs-private */\n scrollableViewProperties) {\n this.connectionPair = connectionPair;\n this.scrollableViewProperties = scrollableViewProperties;\n }\n};\nConnectedOverlayPositionChange = __decorate([\n __param(1, Optional()),\n __metadata(\"design:paramtypes\", [ConnectionPositionPair,\n ScrollingVisibility])\n], ConnectedOverlayPositionChange);\n/**\n * Validates whether a vertical position property matches the expected values.\n * @param property Name of the property being validated.\n * @param value Value of the property being validated.\n * @docs-private\n */\nfunction validateVerticalPosition(property, value) {\n if (value !== 'top' && value !== 'bottom' && value !== 'center') {\n throw Error(`ConnectedPosition: Invalid ${property} \"${value}\". ` +\n `Expected \"top\", \"bottom\" or \"center\".`);\n }\n}\n/**\n * Validates whether a horizontal position property matches the expected values.\n * @param property Name of the property being validated.\n * @param value Value of the property being validated.\n * @docs-private\n */\nfunction validateHorizontalPosition(property, value) {\n if (value !== 'start' && value !== 'end' && value !== 'center') {\n throw Error(`ConnectedPosition: Invalid ${property} \"${value}\". ` +\n `Expected \"start\", \"end\" or \"center\".`);\n }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Service for dispatching events that land on the body to appropriate overlay ref,\n * if any. It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\nclass BaseOverlayDispatcher {\n constructor(document) {\n /** Currently attached overlays in the order they were attached. */\n this._attachedOverlays = [];\n this._document = document;\n }\n ngOnDestroy() {\n this.detach();\n }\n /** Add a new overlay to the list of attached overlay refs. */\n add(overlayRef) {\n // Ensure that we don't get the same overlay multiple times.\n this.remove(overlayRef);\n this._attachedOverlays.push(overlayRef);\n }\n /** Remove an overlay from the list of attached overlay refs. */\n remove(overlayRef) {\n const index = this._attachedOverlays.indexOf(overlayRef);\n if (index > -1) {\n this._attachedOverlays.splice(index, 1);\n }\n // Remove the global listener once there are no more overlays.\n if (this._attachedOverlays.length === 0) {\n this.detach();\n }\n }\n}\nBaseOverlayDispatcher.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: BaseOverlayDispatcher, deps: [{ token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });\nBaseOverlayDispatcher.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: BaseOverlayDispatcher, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: BaseOverlayDispatcher, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Service for dispatching keyboard events that land on the body to appropriate overlay ref,\n * if any. It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\nclass OverlayKeyboardDispatcher extends BaseOverlayDispatcher {\n constructor(document) {\n super(document);\n /** Keyboard event listener that will be attached to the body. */\n this._keydownListener = (event) => {\n const overlays = this._attachedOverlays;\n for (let i = overlays.length - 1; i > -1; i--) {\n // Dispatch the keydown event to the top overlay which has subscribers to its keydown events.\n // We want to target the most recent overlay, rather than trying to match where the event came\n // from, because some components might open an overlay, but keep focus on a trigger element\n // (e.g. for select and autocomplete). We skip overlays without keydown event subscriptions,\n // because we don't want overlays that don't handle keyboard events to block the ones below\n // them that do.\n if (overlays[i]._keydownEvents.observers.length > 0) {\n overlays[i]._keydownEvents.next(event);\n break;\n }\n }\n };\n }\n /** Add a new overlay to the list of attached overlay refs. */\n add(overlayRef) {\n super.add(overlayRef);\n // Lazily start dispatcher once first overlay is added\n if (!this._isAttached) {\n this._document.body.addEventListener('keydown', this._keydownListener);\n this._isAttached = true;\n }\n }\n /** Detaches the global keyboard event listener. */\n detach() {\n if (this._isAttached) {\n this._document.body.removeEventListener('keydown', this._keydownListener);\n this._isAttached = false;\n }\n }\n}\nOverlayKeyboardDispatcher.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayKeyboardDispatcher, deps: [{ token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });\nOverlayKeyboardDispatcher.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayKeyboardDispatcher, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayKeyboardDispatcher, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Service for dispatching mouse click events that land on the body to appropriate overlay ref,\n * if any. It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\nclass OverlayOutsideClickDispatcher extends BaseOverlayDispatcher {\n constructor(document, _platform) {\n super(document);\n this._platform = _platform;\n this._cursorStyleIsSet = false;\n /** Store pointerdown event target to track origin of click. */\n this._pointerDownListener = (event) => {\n this._pointerDownEventTarget = _getEventTarget(event);\n };\n /** Click event listener that will be attached to the body propagate phase. */\n this._clickListener = (event) => {\n const target = _getEventTarget(event);\n // In case of a click event, we want to check the origin of the click\n // (e.g. in case where a user starts a click inside the overlay and\n // releases the click outside of it).\n // This is done by using the event target of the preceding pointerdown event.\n // Every click event caused by a pointer device has a preceding pointerdown\n // event, unless the click was programmatically triggered (e.g. in a unit test).\n const origin = event.type === 'click' && this._pointerDownEventTarget\n ? this._pointerDownEventTarget : target;\n // Reset the stored pointerdown event target, to avoid having it interfere\n // in subsequent events.\n this._pointerDownEventTarget = null;\n // We copy the array because the original may be modified asynchronously if the\n // outsidePointerEvents listener decides to detach overlays resulting in index errors inside\n // the for loop.\n const overlays = this._attachedOverlays.slice();\n // Dispatch the mouse event to the top overlay which has subscribers to its mouse events.\n // We want to target all overlays for which the click could be considered as outside click.\n // As soon as we reach an overlay for which the click is not outside click we break off\n // the loop.\n for (let i = overlays.length - 1; i > -1; i--) {\n const overlayRef = overlays[i];\n if (overlayRef._outsidePointerEvents.observers.length < 1 || !overlayRef.hasAttached()) {\n continue;\n }\n // If it's a click inside the overlay, just break - we should do nothing\n // If it's an outside click (both origin and target of the click) dispatch the mouse event,\n // and proceed with the next overlay\n if (overlayRef.overlayElement.contains(target) ||\n overlayRef.overlayElement.contains(origin)) {\n break;\n }\n overlayRef._outsidePointerEvents.next(event);\n }\n };\n }\n /** Add a new overlay to the list of attached overlay refs. */\n add(overlayRef) {\n super.add(overlayRef);\n // Safari on iOS does not generate click events for non-interactive\n // elements. However, we want to receive a click for any element outside\n // the overlay. We can force a \"clickable\" state by setting\n // `cursor: pointer` on the document body. See:\n // https://developer.mozilla.org/en-US/docs/Web/API/Element/click_event#Safari_Mobile\n // https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html\n if (!this._isAttached) {\n const body = this._document.body;\n body.addEventListener('pointerdown', this._pointerDownListener, true);\n body.addEventListener('click', this._clickListener, true);\n body.addEventListener('auxclick', this._clickListener, true);\n body.addEventListener('contextmenu', this._clickListener, true);\n // click event is not fired on iOS. To make element \"clickable\" we are\n // setting the cursor to pointer\n if (this._platform.IOS && !this._cursorStyleIsSet) {\n this._cursorOriginalValue = body.style.cursor;\n body.style.cursor = 'pointer';\n this._cursorStyleIsSet = true;\n }\n this._isAttached = true;\n }\n }\n /** Detaches the global keyboard event listener. */\n detach() {\n if (this._isAttached) {\n const body = this._document.body;\n body.removeEventListener('pointerdown', this._pointerDownListener, true);\n body.removeEventListener('click', this._clickListener, true);\n body.removeEventListener('auxclick', this._clickListener, true);\n body.removeEventListener('contextmenu', this._clickListener, true);\n if (this._platform.IOS && this._cursorStyleIsSet) {\n body.style.cursor = this._cursorOriginalValue;\n this._cursorStyleIsSet = false;\n }\n this._isAttached = false;\n }\n }\n}\nOverlayOutsideClickDispatcher.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayOutsideClickDispatcher, deps: [{ token: DOCUMENT }, { token: i1$1.Platform }], target: i0.ɵɵFactoryTarget.Injectable });\nOverlayOutsideClickDispatcher.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayOutsideClickDispatcher, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayOutsideClickDispatcher, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }, { type: i1$1.Platform }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** Container inside which all overlays will render. */\nclass OverlayContainer {\n constructor(document, _platform) {\n this._platform = _platform;\n this._document = document;\n }\n ngOnDestroy() {\n this._containerElement?.remove();\n }\n /**\n * This method returns the overlay container element. It will lazily\n * create the element the first time it is called to facilitate using\n * the container in non-browser environments.\n * @returns the container element\n */\n getContainerElement() {\n if (!this._containerElement) {\n this._createContainer();\n }\n return this._containerElement;\n }\n /**\n * Create the overlay container element, which is simply a div\n * with the 'cdk-overlay-container' class on the document body.\n */\n _createContainer() {\n const containerClass = 'cdk-overlay-container';\n // TODO(crisbeto): remove the testing check once we have an overlay testing\n // module or Angular starts tearing down the testing `NgModule`. See:\n // https://github.com/angular/angular/issues/18831\n if (this._platform.isBrowser || _isTestEnvironment()) {\n const oppositePlatformContainers = this._document.querySelectorAll(`.${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 }\n else if (!this._platform.isBrowser) {\n container.setAttribute('platform', 'server');\n }\n this._document.body.appendChild(container);\n this._containerElement = container;\n }\n}\nOverlayContainer.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayContainer, deps: [{ token: DOCUMENT }, { token: i1$1.Platform }], target: i0.ɵɵFactoryTarget.Injectable });\nOverlayContainer.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayContainer, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayContainer, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }, { type: i1$1.Platform }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Reference to an overlay that has been created with the Overlay service.\n * Used to manipulate or dispose of said overlay.\n */\nclass OverlayRef {\n constructor(_portalOutlet, _host, _pane, _config, _ngZone, _keyboardDispatcher, _document, _location, _outsideClickDispatcher) {\n this._portalOutlet = _portalOutlet;\n this._host = _host;\n this._pane = _pane;\n this._config = _config;\n this._ngZone = _ngZone;\n this._keyboardDispatcher = _keyboardDispatcher;\n this._document = _document;\n this._location = _location;\n this._outsideClickDispatcher = _outsideClickDispatcher;\n this._backdropElement = null;\n this._backdropClick = new Subject();\n this._attachments = new Subject();\n this._detachments = new Subject();\n this._locationChanges = Subscription.EMPTY;\n this._backdropClickHandler = (event) => this._backdropClick.next(event);\n /** Stream of keydown events dispatched to this overlay. */\n this._keydownEvents = new Subject();\n /** Stream of mouse outside events dispatched to this overlay. */\n this._outsidePointerEvents = new Subject();\n if (_config.scrollStrategy) {\n this._scrollStrategy = _config.scrollStrategy;\n this._scrollStrategy.attach(this);\n }\n this._positionStrategy = _config.positionStrategy;\n }\n /** The overlay's HTML element */\n get overlayElement() {\n return this._pane;\n }\n /** The overlay's backdrop HTML element. */\n get backdropElement() {\n return this._backdropElement;\n }\n /**\n * Wrapper around the panel element. Can be used for advanced\n * positioning where a wrapper with specific styling is\n * required around the overlay pane.\n */\n get hostElement() {\n return this._host;\n }\n /**\n * Attaches content, given via a Portal, to the overlay.\n * If the overlay is configured to have a backdrop, it will be created.\n *\n * @param portal Portal instance to which to attach the overlay.\n * @returns The portal attachment result.\n */\n attach(portal) {\n let attachResult = this._portalOutlet.attach(portal);\n // Update the pane element with the given configuration.\n if (!this._host.parentElement && this._previousHostParent) {\n this._previousHostParent.appendChild(this._host);\n }\n if (this._positionStrategy) {\n this._positionStrategy.attach(this);\n }\n this._updateStackingOrder();\n this._updateElementSize();\n this._updateElementDirection();\n if (this._scrollStrategy) {\n this._scrollStrategy.enable();\n }\n // Update the position once the zone is stable so that the overlay will be fully rendered\n // before attempting to position it, as the position may depend on the size of the rendered\n // content.\n this._ngZone.onStable.pipe(take(1)).subscribe(() => {\n // The overlay could've been detached before the zone has stabilized.\n if (this.hasAttached()) {\n this.updatePosition();\n }\n });\n // Enable pointer events for the overlay pane element.\n this._togglePointerEvents(true);\n if (this._config.hasBackdrop) {\n this._attachBackdrop();\n }\n if (this._config.panelClass) {\n this._toggleClasses(this._pane, this._config.panelClass, true);\n }\n // Only emit the `attachments` event once all other setup is done.\n this._attachments.next();\n // Track this overlay by the keyboard dispatcher\n this._keyboardDispatcher.add(this);\n if (this._config.disposeOnNavigation) {\n this._locationChanges = this._location.subscribe(() => this.dispose());\n }\n this._outsideClickDispatcher.add(this);\n return attachResult;\n }\n /**\n * Detaches an overlay from a portal.\n * @returns The portal detachment result.\n */\n detach() {\n if (!this.hasAttached()) {\n return;\n }\n this.detachBackdrop();\n // When the overlay is detached, the pane element should disable pointer events.\n // This is necessary because otherwise the pane element will cover the page and disable\n // pointer events therefore. Depends on the position strategy and the applied pane boundaries.\n this._togglePointerEvents(false);\n if (this._positionStrategy && this._positionStrategy.detach) {\n this._positionStrategy.detach();\n }\n if (this._scrollStrategy) {\n this._scrollStrategy.disable();\n }\n const detachmentResult = this._portalOutlet.detach();\n // Only emit after everything is detached.\n this._detachments.next();\n // Remove this overlay from keyboard dispatcher tracking.\n this._keyboardDispatcher.remove(this);\n // Keeping the host element in the DOM can cause scroll jank, because it still gets\n // rendered, even though it's transparent and unclickable which is why we remove it.\n this._detachContentWhenStable();\n this._locationChanges.unsubscribe();\n this._outsideClickDispatcher.remove(this);\n return detachmentResult;\n }\n /** Cleans up the overlay from the DOM. */\n dispose() {\n 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 = { ...this._config, ...sizeConfig };\n this._updateElementSize();\n }\n /** Sets the LTR/RTL direction for the overlay. */\n setDirection(dir) {\n this._config = { ...this._config, direction: dir };\n this._updateElementDirection();\n }\n /** Add a CSS class or an array of classes to the overlay pane. */\n addPanelClass(classes) {\n if (this._pane) {\n this._toggleClasses(this._pane, classes, true);\n }\n }\n /** Remove a CSS class or an array of classes from the overlay pane. */\n removePanelClass(classes) {\n if (this._pane) {\n this._toggleClasses(this._pane, classes, false);\n }\n }\n /**\n * Returns the layout direction of the overlay panel.\n */\n getDirection() {\n const direction = this._config.direction;\n if (!direction) {\n return 'ltr';\n }\n return typeof direction === 'string' ? direction : direction.value;\n }\n /** Switches to a new scroll strategy. */\n updateScrollStrategy(strategy) {\n if (strategy === this._scrollStrategy) {\n return;\n }\n this._disposeScrollStrategy();\n this._scrollStrategy = strategy;\n if (this.hasAttached()) {\n strategy.attach(this);\n strategy.enable();\n }\n }\n /** Updates the text direction of the overlay panel. */\n _updateElementDirection() {\n this._host.setAttribute('dir', this.getDirection());\n }\n /** Updates the size of the overlay element based on the overlay config. */\n _updateElementSize() {\n if (!this._pane) {\n return;\n }\n const style = this._pane.style;\n style.width = coerceCssPixelValue(this._config.width);\n style.height = coerceCssPixelValue(this._config.height);\n style.minWidth = coerceCssPixelValue(this._config.minWidth);\n style.minHeight = coerceCssPixelValue(this._config.minHeight);\n style.maxWidth = coerceCssPixelValue(this._config.maxWidth);\n style.maxHeight = coerceCssPixelValue(this._config.maxHeight);\n }\n /** Toggles the pointer events for the overlay pane element. */\n _togglePointerEvents(enablePointer) {\n this._pane.style.pointerEvents = enablePointer ? '' : 'none';\n }\n /** Attaches a backdrop for this overlay. */\n _attachBackdrop() {\n const showingClass = 'cdk-overlay-backdrop-showing';\n this._backdropElement = this._document.createElement('div');\n this._backdropElement.classList.add('cdk-overlay-backdrop');\n if (this._config.backdropClass) {\n this._toggleClasses(this._backdropElement, this._config.backdropClass, true);\n }\n // Insert the backdrop before the pane in the DOM order,\n // in order to handle stacked overlays properly.\n this._host.parentElement.insertBefore(this._backdropElement, this._host);\n // Forward backdrop clicks such that the consumer of the overlay can perform whatever\n // action desired when such a click occurs (usually closing the overlay).\n this._backdropElement.addEventListener('click', this._backdropClickHandler);\n // Add class to fade-in the backdrop after one frame.\n if (typeof requestAnimationFrame !== 'undefined') {\n this._ngZone.runOutsideAngular(() => {\n requestAnimationFrame(() => {\n if (this._backdropElement) {\n this._backdropElement.classList.add(showingClass);\n }\n });\n });\n }\n else {\n this._backdropElement.classList.add(showingClass);\n }\n }\n /**\n * Updates the stacking order of the element, moving it to the top if necessary.\n * This is required in cases where one overlay was detached, while another one,\n * that should be behind it, was destroyed. The next time both of them are opened,\n * the stacking will be wrong, because the detached element's pane will still be\n * in its original DOM position.\n */\n _updateStackingOrder() {\n if (this._host.nextSibling) {\n this._host.parentNode.appendChild(this._host);\n }\n }\n /** Detaches the backdrop (if any) associated with the overlay. */\n detachBackdrop() {\n const backdropToDetach = this._backdropElement;\n if (!backdropToDetach) {\n return;\n }\n let timeoutId;\n const finishDetach = () => {\n // It may not be attached to anything in certain cases (e.g. unit tests).\n if (backdropToDetach) {\n backdropToDetach.removeEventListener('click', this._backdropClickHandler);\n backdropToDetach.removeEventListener('transitionend', finishDetach);\n this._disposeBackdrop(backdropToDetach);\n }\n if (this._config.backdropClass) {\n this._toggleClasses(backdropToDetach, this._config.backdropClass, false);\n }\n clearTimeout(timeoutId);\n };\n backdropToDetach.classList.remove('cdk-overlay-backdrop-showing');\n this._ngZone.runOutsideAngular(() => {\n backdropToDetach.addEventListener('transitionend', finishDetach);\n });\n // If the backdrop doesn't have a transition, the `transitionend` event won't fire.\n // In this case we make it unclickable and we try to remove it after a delay.\n backdropToDetach.style.pointerEvents = 'none';\n // Run this outside the Angular zone because there's nothing that Angular cares about.\n // If it were to run inside the Angular zone, every test that used Overlay would have to be\n // either async or fakeAsync.\n timeoutId = this._ngZone.runOutsideAngular(() => setTimeout(finishDetach, 500));\n }\n /** Toggles a single CSS class or an array of classes on an element. */\n _toggleClasses(element, cssClasses, isAdd) {\n const classes = coerceArray(cssClasses || []).filter(c => !!c);\n if (classes.length) {\n isAdd ? element.classList.add(...classes) : element.classList.remove(...classes);\n }\n }\n /** Detaches the overlay content next time the zone stabilizes. */\n _detachContentWhenStable() {\n // Normally we wouldn't have to explicitly run this outside the `NgZone`, however\n // if the consumer is using `zone-patch-rxjs`, the `Subscription.unsubscribe` call will\n // be patched to run inside the zone, which will throw us into an infinite loop.\n this._ngZone.runOutsideAngular(() => {\n // We can't remove the host here immediately, because the overlay pane's content\n // might still be animating. This stream helps us avoid interrupting the animation\n // by waiting for the pane to become empty.\n const subscription = this._ngZone.onStable\n .pipe(takeUntil(merge(this._attachments, this._detachments)))\n .subscribe(() => {\n // Needs a couple of checks for the pane and host, because\n // they may have been removed by the time the zone stabilizes.\n if (!this._pane || !this._host || this._pane.children.length === 0) {\n if (this._pane && this._config.panelClass) {\n this._toggleClasses(this._pane, this._config.panelClass, false);\n }\n if (this._host && this._host.parentElement) {\n this._previousHostParent = this._host.parentElement;\n this._host.remove();\n }\n subscription.unsubscribe();\n }\n });\n });\n }\n /** Disposes of a scroll strategy. */\n _disposeScrollStrategy() {\n const scrollStrategy = this._scrollStrategy;\n if (scrollStrategy) {\n scrollStrategy.disable();\n if (scrollStrategy.detach) {\n scrollStrategy.detach();\n }\n }\n }\n /** Removes a backdrop element from the DOM. */\n _disposeBackdrop(backdrop) {\n if (backdrop) {\n backdrop.remove();\n // It is possible that a new portal has been attached to this overlay since we started\n // removing the backdrop. If that is the case, only clear the backdrop reference if it\n // is still the same instance that we started to remove.\n if (this._backdropElement === backdrop) {\n this._backdropElement = null;\n }\n }\n }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// TODO: refactor clipping detection into a separate thing (part of scrolling module)\n// TODO: doesn't handle both flexible width and height when it has to scroll along both axis.\n/** Class to be added to the overlay bounding box. */\nconst boundingBoxClass = 'cdk-overlay-connected-position-bounding-box';\n/** Regex used to split a string on its CSS units. */\nconst cssUnitPattern = /([A-Za-z%]+)$/;\n/**\n * A strategy for positioning overlays. Using this strategy, an overlay is given an\n * implicit position relative some origin element. The relative position is defined in terms of\n * a point on the origin element that is connected to a point on the overlay element. For example,\n * a basic dropdown is connecting the bottom-left corner of the origin to the top-left corner\n * of the overlay.\n */\nclass FlexibleConnectedPositionStrategy {\n constructor(connectedTo, _viewportRuler, _document, _platform, _overlayContainer) {\n this._viewportRuler = _viewportRuler;\n this._document = _document;\n this._platform = _platform;\n this._overlayContainer = _overlayContainer;\n /** Last size used for the bounding box. Used to avoid resizing the overlay after open. */\n this._lastBoundingBoxSize = { width: 0, height: 0 };\n /** Whether the overlay was pushed in a previous positioning. */\n this._isPushed = false;\n /** Whether the overlay can be pushed on-screen on the initial open. */\n this._canPush = true;\n /** Whether the overlay can grow via flexible width/height after the initial open. */\n this._growAfterOpen = false;\n /** Whether the overlay's width and height can be constrained to fit within the viewport. */\n this._hasFlexibleDimensions = true;\n /** Whether the overlay position is locked. */\n this._positionLocked = false;\n /** Amount of space that must be maintained between the overlay and the edge of the viewport. */\n this._viewportMargin = 0;\n /** The Scrollable containers used to check scrollable view properties on position change. */\n this._scrollables = [];\n /** Ordered list of preferred positions, from most to least desirable. */\n this._preferredPositions = [];\n /** Subject that emits whenever the position changes. */\n this._positionChanges = new Subject();\n /** Subscription to viewport size changes. */\n this._resizeSubscription = Subscription.EMPTY;\n /** Default offset for the overlay along the x axis. */\n this._offsetX = 0;\n /** Default offset for the overlay along the y axis. */\n this._offsetY = 0;\n /** Keeps track of the CSS classes that the position strategy has applied on the overlay panel. */\n this._appliedPanelClasses = [];\n /** Observable sequence of position changes. */\n this.positionChanges = this._positionChanges;\n this.setOrigin(connectedTo);\n }\n /** Ordered list of preferred positions, from most to least desirable. */\n get positions() {\n return this._preferredPositions;\n }\n /** Attaches this position strategy to an overlay. */\n attach(overlayRef) {\n if (this._overlayRef &&\n overlayRef !== this._overlayRef &&\n (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw Error('This position strategy is already attached to an overlay');\n }\n this._validatePositions();\n overlayRef.hostElement.classList.add(boundingBoxClass);\n this._overlayRef = overlayRef;\n this._boundingBox = overlayRef.hostElement;\n this._pane = overlayRef.overlayElement;\n this._isDisposed = false;\n this._isInitialRender = true;\n this._lastPosition = null;\n this._resizeSubscription.unsubscribe();\n this._resizeSubscription = this._viewportRuler.change().subscribe(() => {\n // When the window is resized, we want to trigger the next reposition as if it\n // was an initial render, in order for the strategy to pick a new optimal position,\n // otherwise position locking will cause it to stay at the old one.\n this._isInitialRender = true;\n this.apply();\n });\n }\n /**\n * Updates the position of the overlay element, using whichever preferred position relative\n * to the origin best fits on-screen.\n *\n * The selection of a position goes as follows:\n * - If any positions fit completely within the viewport as-is,\n * choose the first position that does so.\n * - If flexible dimensions are enabled and at least one satifies the given minimum width/height,\n * choose the position with the greatest available size modified by the positions' weight.\n * - If pushing is enabled, take the position that went off-screen the least and push it\n * on-screen.\n * - If none of the previous criteria were met, use the position that goes off-screen the least.\n * @docs-private\n */\n apply() {\n // We shouldn't do anything if the strategy was disposed or we're on the server.\n if (this._isDisposed || !this._platform.isBrowser) {\n return;\n }\n // If the position has been applied already (e.g. when the overlay was opened) and the\n // consumer opted into locking in the position, re-use the old position, in order to\n // prevent the overlay from jumping around.\n if (!this._isInitialRender && this._positionLocked && this._lastPosition) {\n this.reapplyLastPosition();\n return;\n }\n this._clearPanelClasses();\n this._resetOverlayElementStyles();\n this._resetBoundingBoxStyles();\n // We need the bounding rects for the origin and the overlay to determine how to position\n // the overlay relative to the origin.\n // We use the viewport rect to determine whether a position would go off-screen.\n this._viewportRect = this._getNarrowedViewportRect();\n this._originRect = this._getOriginRect();\n this._overlayRect = this._pane.getBoundingClientRect();\n const originRect = this._originRect;\n const overlayRect = this._overlayRect;\n const viewportRect = this._viewportRect;\n // Positions where the overlay will fit with flexible dimensions.\n const flexibleFits = [];\n // Fallback if none of the preferred positions fit within the viewport.\n let fallback;\n // Go through each of the preferred positions looking for a good fit.\n // If a good fit is found, it will be applied immediately.\n for (let pos of this._preferredPositions) {\n // Get the exact (x, y) coordinate for the point-of-origin on the origin element.\n let originPoint = this._getOriginPoint(originRect, pos);\n // From that point-of-origin, get the exact (x, y) coordinate for the top-left corner of the\n // overlay in this position. We use the top-left corner for calculations and later translate\n // this into an appropriate (top, left, bottom, right) style.\n let overlayPoint = this._getOverlayPoint(originPoint, overlayRect, pos);\n // Calculate how well the overlay would fit into the viewport with this point.\n let overlayFit = this._getOverlayFit(overlayPoint, overlayRect, viewportRect, pos);\n // If the overlay, without any further work, fits into the viewport, use this position.\n if (overlayFit.isCompletelyWithinViewport) {\n this._isPushed = false;\n this._applyPosition(pos, originPoint);\n return;\n }\n // If the overlay has flexible dimensions, we can use this position\n // so long as there's enough space for the minimum dimensions.\n if (this._canFitWithFlexibleDimensions(overlayFit, overlayPoint, viewportRect)) {\n // Save positions where the overlay will fit with flexible dimensions. We will use these\n // if none of the positions fit *without* flexible dimensions.\n flexibleFits.push({\n position: pos,\n origin: originPoint,\n overlayRect,\n boundingBoxRect: this._calculateBoundingBoxRect(originPoint, pos),\n });\n continue;\n }\n // If the current preferred position does not fit on the screen, remember the position\n // if it has more visible area on-screen than we've seen and move onto the next preferred\n // position.\n if (!fallback || fallback.overlayFit.visibleArea < overlayFit.visibleArea) {\n fallback = { overlayFit, overlayPoint, originPoint, position: pos, overlayRect };\n }\n }\n // If there are any positions where the overlay would fit with flexible dimensions, choose the\n // one that has the greatest area available modified by the position's weight\n if (flexibleFits.length) {\n let bestFit = null;\n let bestScore = -1;\n for (const fit of flexibleFits) {\n const score = fit.boundingBoxRect.width * fit.boundingBoxRect.height * (fit.position.weight || 1);\n if (score > bestScore) {\n bestScore = score;\n bestFit = fit;\n }\n }\n this._isPushed = false;\n this._applyPosition(bestFit.position, bestFit.origin);\n return;\n }\n // When none of the preferred positions fit within the viewport, take the position\n // that went off-screen the least and attempt to push it on-screen.\n if (this._canPush) {\n // TODO(jelbourn): after pushing, the opening \"direction\" of the overlay might not make sense.\n this._isPushed = true;\n this._applyPosition(fallback.position, fallback.originPoint);\n return;\n }\n // All options for getting the overlay within the viewport have been exhausted, so go with the\n // position that went off-screen the least.\n this._applyPosition(fallback.position, fallback.originPoint);\n }\n detach() {\n this._clearPanelClasses();\n this._lastPosition = null;\n this._previousPushAmount = null;\n this._resizeSubscription.unsubscribe();\n }\n /** Cleanup after the element gets destroyed. */\n dispose() {\n if (this._isDisposed) {\n return;\n }\n // We can't use `_resetBoundingBoxStyles` here, because it resets\n // some properties to zero, rather than removing them.\n if (this._boundingBox) {\n extendStyles(this._boundingBox.style, {\n top: '',\n left: '',\n right: '',\n bottom: '',\n height: '',\n width: '',\n alignItems: '',\n justifyContent: '',\n });\n }\n if (this._pane) {\n this._resetOverlayElementStyles();\n }\n if (this._overlayRef) {\n this._overlayRef.hostElement.classList.remove(boundingBoxClass);\n }\n this.detach();\n this._positionChanges.complete();\n this._overlayRef = this._boundingBox = null;\n this._isDisposed = true;\n }\n /**\n * This re-aligns the overlay element with the trigger in its last calculated position,\n * even if a position higher in the \"preferred positions\" list would now fit. This\n * allows one to re-align the panel without changing the orientation of the panel.\n */\n reapplyLastPosition() {\n if (!this._isDisposed && (!this._platform || this._platform.isBrowser)) {\n this._originRect = this._getOriginRect();\n this._overlayRect = this._pane.getBoundingClientRect();\n this._viewportRect = this._getNarrowedViewportRect();\n const lastPosition = this._lastPosition || this._preferredPositions[0];\n const originPoint = this._getOriginPoint(this._originRect, lastPosition);\n this._applyPosition(lastPosition, originPoint);\n }\n }\n /**\n * Sets the list of Scrollable containers that host the origin element so that\n * on reposition we can evaluate if it or the overlay has been clipped or outside view. Every\n * Scrollable must be an ancestor element of the strategy's origin element.\n */\n withScrollableContainers(scrollables) {\n this._scrollables = scrollables;\n return this;\n }\n /**\n * Adds new preferred positions.\n * @param positions List of positions options for this overlay.\n */\n withPositions(positions) {\n this._preferredPositions = positions;\n // If the last calculated position object isn't part of the positions anymore, clear\n // it in order to avoid it being picked up if the consumer tries to re-apply.\n if (positions.indexOf(this._lastPosition) === -1) {\n this._lastPosition = null;\n }\n this._validatePositions();\n return this;\n }\n /**\n * Sets a minimum distance the overlay may be positioned to the edge of the viewport.\n * @param margin Required margin between the overlay and the viewport edge in pixels.\n */\n withViewportMargin(margin) {\n this._viewportMargin = margin;\n return this;\n }\n /** Sets whether the overlay's width and height can be constrained to fit within the viewport. */\n withFlexibleDimensions(flexibleDimensions = true) {\n this._hasFlexibleDimensions = flexibleDimensions;\n return this;\n }\n /** Sets whether the overlay can grow after the initial open via flexible width/height. */\n withGrowAfterOpen(growAfterOpen = true) {\n this._growAfterOpen = growAfterOpen;\n return this;\n }\n /** Sets whether the overlay can be pushed on-screen if none of the provided positions fit. */\n withPush(canPush = true) {\n this._canPush = canPush;\n return this;\n }\n /**\n * Sets whether the overlay's position should be locked in after it is positioned\n * initially. When an overlay is locked in, it won't attempt to reposition itself\n * when the position is re-applied (e.g. when the user scrolls away).\n * @param isLocked Whether the overlay should locked in.\n */\n withLockedPosition(isLocked = true) {\n this._positionLocked = isLocked;\n return this;\n }\n /**\n * Sets the origin, relative to which to position the overlay.\n * Using an element origin is useful for building components that need to be positioned\n * relatively to a trigger (e.g. dropdown menus or tooltips), whereas using a point can be\n * used for cases like contextual menus which open relative to the user's pointer.\n * @param origin Reference to the new origin.\n */\n setOrigin(origin) {\n this._origin = origin;\n return this;\n }\n /**\n * Sets the default offset for the overlay's connection point on the x-axis.\n * @param offset New offset in the X axis.\n */\n withDefaultOffsetX(offset) {\n this._offsetX = offset;\n return this;\n }\n /**\n * Sets the default offset for the overlay's connection point on the y-axis.\n * @param offset New offset in the Y axis.\n */\n withDefaultOffsetY(offset) {\n this._offsetY = offset;\n return this;\n }\n /**\n * Configures that the position strategy should set a `transform-origin` on some elements\n * inside the overlay, depending on the current position that is being applied. This is\n * useful for the cases where the origin of an animation can change depending on the\n * alignment of the overlay.\n * @param selector CSS selector that will be used to find the target\n * elements onto which to set the transform origin.\n */\n withTransformOriginOn(selector) {\n this._transformOriginSelector = selector;\n return this;\n }\n /**\n * Gets the (x, y) coordinate of a connection point on the origin based on a relative position.\n */\n _getOriginPoint(originRect, pos) {\n let x;\n if (pos.originX == 'center') {\n // Note: when centering we should always use the `left`\n // offset, otherwise the position will be wrong in RTL.\n x = originRect.left + originRect.width / 2;\n }\n else {\n const startX = this._isRtl() ? originRect.right : originRect.left;\n const endX = this._isRtl() ? originRect.left : originRect.right;\n x = pos.originX == 'start' ? startX : endX;\n }\n let y;\n if (pos.originY == 'center') {\n y = originRect.top + originRect.height / 2;\n }\n else {\n y = pos.originY == 'top' ? originRect.top : originRect.bottom;\n }\n return { x, y };\n }\n /**\n * Gets the (x, y) coordinate of the top-left corner of the overlay given a given position and\n * origin point to which the overlay should be connected.\n */\n _getOverlayPoint(originPoint, overlayRect, pos) {\n // Calculate the (overlayStartX, overlayStartY), the start of the\n // potential overlay position relative to the origin point.\n let overlayStartX;\n if (pos.overlayX == 'center') {\n overlayStartX = -overlayRect.width / 2;\n }\n else if (pos.overlayX === 'start') {\n overlayStartX = this._isRtl() ? -overlayRect.width : 0;\n }\n else {\n overlayStartX = this._isRtl() ? 0 : -overlayRect.width;\n }\n let overlayStartY;\n if (pos.overlayY == 'center') {\n overlayStartY = -overlayRect.height / 2;\n }\n else {\n overlayStartY = pos.overlayY == 'top' ? 0 : -overlayRect.height;\n }\n // The (x, y) coordinates of the overlay.\n return {\n x: originPoint.x + overlayStartX,\n y: originPoint.y + overlayStartY,\n };\n }\n /** Gets how well an overlay at the given point will fit within the viewport. */\n _getOverlayFit(point, rawOverlayRect, viewport, position) {\n // Round the overlay rect when comparing against the\n // viewport, because the viewport is always rounded.\n const overlay = getRoundedBoundingClientRect(rawOverlayRect);\n let { x, y } = point;\n let offsetX = this._getOffset(position, 'x');\n let offsetY = this._getOffset(position, 'y');\n // Account for the offsets since they could push the overlay out of the viewport.\n if (offsetX) {\n x += offsetX;\n }\n if (offsetY) {\n y += offsetY;\n }\n // How much the overlay would overflow at this position, on each side.\n let leftOverflow = 0 - x;\n let rightOverflow = x + overlay.width - viewport.width;\n let topOverflow = 0 - y;\n let bottomOverflow = y + overlay.height - viewport.height;\n // Visible parts of the element on each axis.\n let visibleWidth = this._subtractOverflows(overlay.width, leftOverflow, rightOverflow);\n let visibleHeight = this._subtractOverflows(overlay.height, topOverflow, bottomOverflow);\n let visibleArea = visibleWidth * visibleHeight;\n return {\n visibleArea,\n isCompletelyWithinViewport: overlay.width * overlay.height === visibleArea,\n fitsInViewportVertically: visibleHeight === overlay.height,\n fitsInViewportHorizontally: visibleWidth == overlay.width,\n };\n }\n /**\n * Whether the overlay can fit within the viewport when it may resize either its width or height.\n * @param fit How well the overlay fits in the viewport at some position.\n * @param point The (x, y) coordinates of the overlat at some position.\n * @param viewport The geometry of the viewport.\n */\n _canFitWithFlexibleDimensions(fit, point, viewport) {\n if (this._hasFlexibleDimensions) {\n const availableHeight = viewport.bottom - point.y;\n const availableWidth = viewport.right - point.x;\n const minHeight = getPixelValue(this._overlayRef.getConfig().minHeight);\n const minWidth = getPixelValue(this._overlayRef.getConfig().minWidth);\n const verticalFit = fit.fitsInViewportVertically || (minHeight != null && minHeight <= availableHeight);\n const horizontalFit = fit.fitsInViewportHorizontally || (minWidth != null && minWidth <= availableWidth);\n return verticalFit && horizontalFit;\n }\n return false;\n }\n /**\n * Gets the point at which the overlay can be \"pushed\" on-screen. If the overlay is larger than\n * the viewport, the top-left corner will be pushed on-screen (with overflow occuring on the\n * right and bottom).\n *\n * @param start Starting point from which the overlay is pushed.\n * @param overlay Dimensions of the overlay.\n * @param scrollPosition Current viewport scroll position.\n * @returns The point at which to position the overlay after pushing. This is effectively a new\n * originPoint.\n */\n _pushOverlayOnScreen(start, rawOverlayRect, scrollPosition) {\n // If the position is locked and we've pushed the overlay already, reuse the previous push\n // amount, rather than pushing it again. If we were to continue pushing, the element would\n // remain in the viewport, which goes against the expectations when position locking is enabled.\n if (this._previousPushAmount && this._positionLocked) {\n return {\n x: start.x + this._previousPushAmount.x,\n y: start.y + this._previousPushAmount.y,\n };\n }\n // Round the overlay rect when comparing against the\n // viewport, because the viewport is always rounded.\n const overlay = getRoundedBoundingClientRect(rawOverlayRect);\n const viewport = this._viewportRect;\n // Determine how much the overlay goes outside the viewport on each\n // side, which we'll use to decide which direction to push it.\n const overflowRight = Math.max(start.x + overlay.width - viewport.width, 0);\n const overflowBottom = Math.max(start.y + overlay.height - viewport.height, 0);\n const overflowTop = Math.max(viewport.top - scrollPosition.top - start.y, 0);\n const overflowLeft = Math.max(viewport.left - scrollPosition.left - start.x, 0);\n // Amount by which to push the overlay in each axis such that it remains on-screen.\n let pushX = 0;\n let pushY = 0;\n // If the overlay fits completely within the bounds of the viewport, push it from whichever\n // direction is goes off-screen. Otherwise, push the top-left corner such that its in the\n // viewport and allow for the trailing end of the overlay to go out of bounds.\n if (overlay.width <= viewport.width) {\n pushX = overflowLeft || -overflowRight;\n }\n else {\n pushX = start.x < this._viewportMargin ? viewport.left - scrollPosition.left - start.x : 0;\n }\n if (overlay.height <= viewport.height) {\n pushY = overflowTop || -overflowBottom;\n }\n else {\n pushY = start.y < this._viewportMargin ? viewport.top - scrollPosition.top - start.y : 0;\n }\n this._previousPushAmount = { x: pushX, y: pushY };\n return {\n x: start.x + pushX,\n y: start.y + pushY,\n };\n }\n /**\n * Applies a computed position to the overlay and emits a position change.\n * @param position The position preference\n * @param originPoint The point on the origin element where the overlay is connected.\n */\n _applyPosition(position, originPoint) {\n this._setTransformOrigin(position);\n this._setOverlayElementStyles(originPoint, position);\n this._setBoundingBoxStyles(originPoint, position);\n if (position.panelClass) {\n this._addPanelClasses(position.panelClass);\n }\n // Save the last connected position in case the position needs to be re-calculated.\n this._lastPosition = position;\n // Notify that the position has been changed along with its change properties.\n // We only emit if we've got any subscriptions, because the scroll visibility\n // calculcations can be somewhat expensive.\n if (this._positionChanges.observers.length) {\n const scrollableViewProperties = this._getScrollVisibility();\n const changeEvent = new ConnectedOverlayPositionChange(position, scrollableViewProperties);\n this._positionChanges.next(changeEvent);\n }\n this._isInitialRender = false;\n }\n /** Sets the transform origin based on the configured selector and the passed-in position. */\n _setTransformOrigin(position) {\n if (!this._transformOriginSelector) {\n return;\n }\n const elements = this._boundingBox.querySelectorAll(this._transformOriginSelector);\n let xOrigin;\n let yOrigin = position.overlayY;\n if (position.overlayX === 'center') {\n xOrigin = 'center';\n }\n else if (this._isRtl()) {\n xOrigin = position.overlayX === 'start' ? 'right' : 'left';\n }\n else {\n xOrigin = position.overlayX === 'start' ? 'left' : 'right';\n }\n for (let i = 0; i < elements.length; i++) {\n elements[i].style.transformOrigin = `${xOrigin} ${yOrigin}`;\n }\n }\n /**\n * Gets the position and size of the overlay's sizing container.\n *\n * This method does no measuring and applies no styles so that we can cheaply compute the\n * bounds for all positions and choose the best fit based on these results.\n */\n _calculateBoundingBoxRect(origin, position) {\n const viewport = this._viewportRect;\n const isRtl = this._isRtl();\n let height, top, bottom;\n if (position.overlayY === 'top') {\n // Overlay is opening \"downward\" and thus is bound by the bottom viewport edge.\n top = origin.y;\n height = viewport.height - top + this._viewportMargin;\n }\n else if (position.overlayY === 'bottom') {\n // Overlay is opening \"upward\" and thus is bound by the top viewport edge. We need to add\n // the viewport margin back in, because the viewport rect is narrowed down to remove the\n // margin, whereas the `origin` position is calculated based on its `ClientRect`.\n bottom = viewport.height - origin.y + this._viewportMargin * 2;\n height = viewport.height - bottom + this._viewportMargin;\n }\n else {\n // If neither top nor bottom, it means that the overlay is vertically centered on the\n // origin point. Note that we want the position relative to the viewport, rather than\n // the page, which is why we don't use something like `viewport.bottom - origin.y` and\n // `origin.y - viewport.top`.\n const smallestDistanceToViewportEdge = Math.min(viewport.bottom - origin.y + viewport.top, origin.y);\n const previousHeight = this._lastBoundingBoxSize.height;\n height = smallestDistanceToViewportEdge * 2;\n top = origin.y - smallestDistanceToViewportEdge;\n if (height > previousHeight && !this._isInitialRender && !this._growAfterOpen) {\n top = origin.y - previousHeight / 2;\n }\n }\n // The overlay is opening 'right-ward' (the content flows to the right).\n const isBoundedByRightViewportEdge = (position.overlayX === 'start' && !isRtl) || (position.overlayX === 'end' && isRtl);\n // The overlay is opening 'left-ward' (the content flows to the left).\n const isBoundedByLeftViewportEdge = (position.overlayX === 'end' && !isRtl) || (position.overlayX === 'start' && isRtl);\n let width, left, right;\n if (isBoundedByLeftViewportEdge) {\n right = viewport.width - origin.x + this._viewportMargin;\n width = origin.x - this._viewportMargin;\n }\n else if (isBoundedByRightViewportEdge) {\n left = origin.x;\n width = viewport.right - origin.x;\n }\n else {\n // If neither start nor end, it means that the overlay is horizontally centered on the\n // origin point. Note that we want the position relative to the viewport, rather than\n // the page, which is why we don't use something like `viewport.right - origin.x` and\n // `origin.x - viewport.left`.\n const smallestDistanceToViewportEdge = Math.min(viewport.right - origin.x + viewport.left, origin.x);\n const previousWidth = this._lastBoundingBoxSize.width;\n width = smallestDistanceToViewportEdge * 2;\n left = origin.x - smallestDistanceToViewportEdge;\n if (width > previousWidth && !this._isInitialRender && !this._growAfterOpen) {\n left = origin.x - previousWidth / 2;\n }\n }\n return { top: top, left: left, bottom: bottom, right: right, width, height };\n }\n /**\n * Sets the position and size of the overlay's sizing wrapper. The wrapper is positioned on the\n * origin's connection point and stetches to the bounds of the viewport.\n *\n * @param origin The point on the origin element where the overlay is connected.\n * @param position The position preference\n */\n _setBoundingBoxStyles(origin, position) {\n const boundingBoxRect = this._calculateBoundingBoxRect(origin, position);\n // It's weird if the overlay *grows* while scrolling, so we take the last size into account\n // when applying a new size.\n if (!this._isInitialRender && !this._growAfterOpen) {\n boundingBoxRect.height = Math.min(boundingBoxRect.height, this._lastBoundingBoxSize.height);\n boundingBoxRect.width = Math.min(boundingBoxRect.width, this._lastBoundingBoxSize.width);\n }\n const styles = {};\n if (this._hasExactPosition()) {\n styles.top = styles.left = '0';\n styles.bottom = styles.right = styles.maxHeight = styles.maxWidth = '';\n styles.width = styles.height = '100%';\n }\n else {\n const maxHeight = this._overlayRef.getConfig().maxHeight;\n const maxWidth = this._overlayRef.getConfig().maxWidth;\n styles.height = coerceCssPixelValue(boundingBoxRect.height);\n styles.top = coerceCssPixelValue(boundingBoxRect.top);\n styles.bottom = coerceCssPixelValue(boundingBoxRect.bottom);\n styles.width = coerceCssPixelValue(boundingBoxRect.width);\n styles.left = coerceCssPixelValue(boundingBoxRect.left);\n styles.right = coerceCssPixelValue(boundingBoxRect.right);\n // Push the pane content towards the proper direction.\n if (position.overlayX === 'center') {\n styles.alignItems = 'center';\n }\n else {\n styles.alignItems = position.overlayX === 'end' ? 'flex-end' : 'flex-start';\n }\n if (position.overlayY === 'center') {\n styles.justifyContent = 'center';\n }\n else {\n styles.justifyContent = position.overlayY === 'bottom' ? 'flex-end' : 'flex-start';\n }\n if (maxHeight) {\n styles.maxHeight = coerceCssPixelValue(maxHeight);\n }\n if (maxWidth) {\n styles.maxWidth = coerceCssPixelValue(maxWidth);\n }\n }\n this._lastBoundingBoxSize = boundingBoxRect;\n extendStyles(this._boundingBox.style, styles);\n }\n /** Resets the styles for the bounding box so that a new positioning can be computed. */\n _resetBoundingBoxStyles() {\n extendStyles(this._boundingBox.style, {\n top: '0',\n left: '0',\n right: '0',\n bottom: '0',\n height: '',\n width: '',\n alignItems: '',\n justifyContent: '',\n });\n }\n /** Resets the styles for the overlay pane so that a new positioning can be computed. */\n _resetOverlayElementStyles() {\n extendStyles(this._pane.style, {\n top: '',\n left: '',\n bottom: '',\n right: '',\n position: '',\n transform: '',\n });\n }\n /** Sets positioning styles to the overlay element. */\n _setOverlayElementStyles(originPoint, position) {\n const styles = {};\n const hasExactPosition = this._hasExactPosition();\n const hasFlexibleDimensions = this._hasFlexibleDimensions;\n const config = this._overlayRef.getConfig();\n if (hasExactPosition) {\n const scrollPosition = this._viewportRuler.getViewportScrollPosition();\n extendStyles(styles, this._getExactOverlayY(position, originPoint, scrollPosition));\n extendStyles(styles, this._getExactOverlayX(position, originPoint, scrollPosition));\n }\n else {\n styles.position = 'static';\n }\n // Use a transform to apply the offsets. We do this because the `center` positions rely on\n // being in the normal flex flow and setting a `top` / `left` at all will completely throw\n // off the position. We also can't use margins, because they won't have an effect in some\n // cases where the element doesn't have anything to \"push off of\". Finally, this works\n // better both with flexible and non-flexible positioning.\n let transformString = '';\n let offsetX = this._getOffset(position, 'x');\n let offsetY = this._getOffset(position, 'y');\n if (offsetX) {\n transformString += `translateX(${offsetX}px) `;\n }\n if (offsetY) {\n transformString += `translateY(${offsetY}px)`;\n }\n styles.transform = transformString.trim();\n // If a maxWidth or maxHeight is specified on the overlay, we remove them. We do this because\n // we need these values to both be set to \"100%\" for the automatic flexible sizing to work.\n // The maxHeight and maxWidth are set on the boundingBox in order to enforce the constraint.\n // Note that this doesn't apply when we have an exact position, in which case we do want to\n // apply them because they'll be cleared from the bounding box.\n if (config.maxHeight) {\n if (hasExactPosition) {\n styles.maxHeight = coerceCssPixelValue(config.maxHeight);\n }\n else if (hasFlexibleDimensions) {\n styles.maxHeight = '';\n }\n }\n if (config.maxWidth) {\n if (hasExactPosition) {\n styles.maxWidth = coerceCssPixelValue(config.maxWidth);\n }\n else if (hasFlexibleDimensions) {\n styles.maxWidth = '';\n }\n }\n extendStyles(this._pane.style, styles);\n }\n /** Gets the exact top/bottom for the overlay when not using flexible sizing or when pushing. */\n _getExactOverlayY(position, originPoint, scrollPosition) {\n // Reset any existing styles. This is necessary in case the\n // preferred position has changed since the last `apply`.\n let styles = { top: '', bottom: '' };\n let overlayPoint = this._getOverlayPoint(originPoint, this._overlayRect, position);\n if (this._isPushed) {\n overlayPoint = this._pushOverlayOnScreen(overlayPoint, this._overlayRect, scrollPosition);\n }\n let virtualKeyboardOffset = this._overlayContainer\n .getContainerElement()\n .getBoundingClientRect().top;\n // Normally this would be zero, however when the overlay is attached to an input (e.g. in an\n // autocomplete), mobile browsers will shift everything in order to put the input in the middle\n // of the screen and to make space for the virtual keyboard. We need to account for this offset,\n // otherwise our positioning will be thrown off.\n overlayPoint.y -= virtualKeyboardOffset;\n // We want to set either `top` or `bottom` based on whether the overlay wants to appear\n // above or below the origin and the direction in which the element will expand.\n if (position.overlayY === 'bottom') {\n // When using `bottom`, we adjust the y position such that it is the distance\n // from the bottom of the viewport rather than the top.\n const documentHeight = this._document.documentElement.clientHeight;\n styles.bottom = `${documentHeight - (overlayPoint.y + this._overlayRect.height)}px`;\n }\n else {\n styles.top = coerceCssPixelValue(overlayPoint.y);\n }\n return styles;\n }\n /** Gets the exact left/right for the overlay when not using flexible sizing or when pushing. */\n _getExactOverlayX(position, originPoint, scrollPosition) {\n // Reset any existing styles. This is necessary in case the preferred position has\n // changed since the last `apply`.\n let styles = { left: '', right: '' };\n let overlayPoint = this._getOverlayPoint(originPoint, this._overlayRect, position);\n if (this._isPushed) {\n overlayPoint = this._pushOverlayOnScreen(overlayPoint, this._overlayRect, scrollPosition);\n }\n // We want to set either `left` or `right` based on whether the overlay wants to appear \"before\"\n // or \"after\" the origin, which determines the direction in which the element will expand.\n // For the horizontal axis, the meaning of \"before\" and \"after\" change based on whether the\n // page is in RTL or LTR.\n let horizontalStyleProperty;\n if (this._isRtl()) {\n horizontalStyleProperty = position.overlayX === 'end' ? 'left' : 'right';\n }\n else {\n horizontalStyleProperty = position.overlayX === 'end' ? 'right' : 'left';\n }\n // When we're setting `right`, we adjust the x position such that it is the distance\n // from the right edge of the viewport rather than the left edge.\n if (horizontalStyleProperty === 'right') {\n const documentWidth = this._document.documentElement.clientWidth;\n styles.right = `${documentWidth - (overlayPoint.x + this._overlayRect.width)}px`;\n }\n else {\n styles.left = coerceCssPixelValue(overlayPoint.x);\n }\n return styles;\n }\n /**\n * Gets the view properties of the trigger and overlay, including whether they are clipped\n * or completely outside the view of any of the strategy's scrollables.\n */\n _getScrollVisibility() {\n // Note: needs fresh rects since the position could've changed.\n const originBounds = this._getOriginRect();\n const overlayBounds = this._pane.getBoundingClientRect();\n // TODO(jelbourn): instead of needing all of the client rects for these scrolling containers\n // every time, we should be able to use the scrollTop of the containers if the size of those\n // containers hasn't changed.\n const scrollContainerBounds = this._scrollables.map(scrollable => {\n return scrollable.getElementRef().nativeElement.getBoundingClientRect();\n });\n return {\n isOriginClipped: isElementClippedByScrolling(originBounds, scrollContainerBounds),\n isOriginOutsideView: isElementScrolledOutsideView(originBounds, scrollContainerBounds),\n isOverlayClipped: isElementClippedByScrolling(overlayBounds, scrollContainerBounds),\n isOverlayOutsideView: isElementScrolledOutsideView(overlayBounds, scrollContainerBounds),\n };\n }\n /** Subtracts the amount that an element is overflowing on an axis from its length. */\n _subtractOverflows(length, ...overflows) {\n return overflows.reduce((currentValue, currentOverflow) => {\n return currentValue - Math.max(currentOverflow, 0);\n }, length);\n }\n /** Narrows the given viewport rect by the current _viewportMargin. */\n _getNarrowedViewportRect() {\n // We recalculate the viewport rect here ourselves, rather than using the ViewportRuler,\n // because we want to use the `clientWidth` and `clientHeight` as the base. The difference\n // being that the client properties don't include the scrollbar, as opposed to `innerWidth`\n // and `innerHeight` that do. This is necessary, because the overlay container uses\n // 100% `width` and `height` which don't include the scrollbar either.\n const width = this._document.documentElement.clientWidth;\n const height = this._document.documentElement.clientHeight;\n const scrollPosition = this._viewportRuler.getViewportScrollPosition();\n return {\n top: scrollPosition.top + this._viewportMargin,\n left: scrollPosition.left + this._viewportMargin,\n right: scrollPosition.left + width - this._viewportMargin,\n bottom: scrollPosition.top + height - this._viewportMargin,\n width: width - 2 * this._viewportMargin,\n height: height - 2 * this._viewportMargin,\n };\n }\n /** Whether the we're dealing with an RTL context */\n _isRtl() {\n return this._overlayRef.getDirection() === 'rtl';\n }\n /** Determines whether the overlay uses exact or flexible positioning. */\n _hasExactPosition() {\n return !this._hasFlexibleDimensions || this._isPushed;\n }\n /** Retrieves the offset of a position along the x or y axis. */\n _getOffset(position, axis) {\n if (axis === 'x') {\n // We don't do something like `position['offset' + axis]` in\n // order to avoid breking minifiers that rename properties.\n return position.offsetX == null ? this._offsetX : position.offsetX;\n }\n return position.offsetY == null ? this._offsetY : position.offsetY;\n }\n /** Validates that the current position match the expected values. */\n _validatePositions() {\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n if (!this._preferredPositions.length) {\n throw Error('FlexibleConnectedPositionStrategy: At least one position is required.');\n }\n // TODO(crisbeto): remove these once Angular's template type\n // checking is advanced enough to catch these cases.\n this._preferredPositions.forEach(pair => {\n validateHorizontalPosition('originX', pair.originX);\n validateVerticalPosition('originY', pair.originY);\n validateHorizontalPosition('overlayX', pair.overlayX);\n validateVerticalPosition('overlayY', pair.overlayY);\n });\n }\n }\n /** Adds a single CSS class or an array of classes on the overlay panel. */\n _addPanelClasses(cssClasses) {\n if (this._pane) {\n coerceArray(cssClasses).forEach(cssClass => {\n if (cssClass !== '' && this._appliedPanelClasses.indexOf(cssClass) === -1) {\n this._appliedPanelClasses.push(cssClass);\n this._pane.classList.add(cssClass);\n }\n });\n }\n }\n /** Clears the classes that the position strategy has applied from the overlay panel. */\n _clearPanelClasses() {\n if (this._pane) {\n this._appliedPanelClasses.forEach(cssClass => {\n this._pane.classList.remove(cssClass);\n });\n this._appliedPanelClasses = [];\n }\n }\n /** Returns the ClientRect of the current origin. */\n _getOriginRect() {\n const origin = this._origin;\n if (origin instanceof ElementRef) {\n return origin.nativeElement.getBoundingClientRect();\n }\n // Check for Element so SVG elements are also supported.\n if (origin instanceof Element) {\n return origin.getBoundingClientRect();\n }\n const width = origin.width || 0;\n const height = origin.height || 0;\n // If the origin is a point, return a client rect as if it was a 0x0 element at the point.\n return {\n top: origin.y,\n bottom: origin.y + height,\n left: origin.x,\n right: origin.x + width,\n height,\n width,\n };\n }\n}\n/** Shallow-extends a stylesheet object with another stylesheet object. */\nfunction extendStyles(destination, source) {\n for (let key in source) {\n if (source.hasOwnProperty(key)) {\n destination[key] = source[key];\n }\n }\n return destination;\n}\n/**\n * Extracts the pixel value as a number from a value, if it's a number\n * or a CSS pixel string (e.g. `1337px`). Otherwise returns null.\n */\nfunction getPixelValue(input) {\n if (typeof input !== 'number' && input != null) {\n const [value, units] = input.split(cssUnitPattern);\n return !units || units === 'px' ? parseFloat(value) : null;\n }\n return input || null;\n}\n/**\n * Gets a version of an element's bounding `ClientRect` where all the values are rounded down to\n * the nearest pixel. This allows us to account for the cases where there may be sub-pixel\n * deviations in the `ClientRect` returned by the browser (e.g. when zoomed in with a percentage\n * size, see #21350).\n */\nfunction getRoundedBoundingClientRect(clientRect) {\n return {\n top: Math.floor(clientRect.top),\n right: Math.floor(clientRect.right),\n bottom: Math.floor(clientRect.bottom),\n left: Math.floor(clientRect.left),\n width: Math.floor(clientRect.width),\n height: Math.floor(clientRect.height),\n };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** Class to be added to the overlay pane wrapper. */\nconst wrapperClass = 'cdk-global-overlay-wrapper';\n/**\n * A strategy for positioning overlays. Using this strategy, an overlay is given an\n * explicit position relative to the browser's viewport. We use flexbox, instead of\n * transforms, in order to avoid issues with subpixel rendering which can cause the\n * element to become blurry.\n */\nclass GlobalPositionStrategy {\n constructor() {\n this._cssPosition = 'static';\n this._topOffset = '';\n this._bottomOffset = '';\n this._leftOffset = '';\n this._rightOffset = '';\n this._alignItems = '';\n this._justifyContent = '';\n this._width = '';\n this._height = '';\n }\n attach(overlayRef) {\n const config = overlayRef.getConfig();\n this._overlayRef = overlayRef;\n if (this._width && !config.width) {\n overlayRef.updateSize({ width: this._width });\n }\n if (this._height && !config.height) {\n overlayRef.updateSize({ height: this._height });\n }\n overlayRef.hostElement.classList.add(wrapperClass);\n this._isDisposed = false;\n }\n /**\n * Sets the top position of the overlay. Clears any previously set vertical position.\n * @param value New top offset.\n */\n top(value = '') {\n this._bottomOffset = '';\n this._topOffset = value;\n this._alignItems = 'flex-start';\n return this;\n }\n /**\n * Sets the left position of the overlay. Clears any previously set horizontal position.\n * @param value New left offset.\n */\n left(value = '') {\n this._rightOffset = '';\n this._leftOffset = value;\n this._justifyContent = 'flex-start';\n return this;\n }\n /**\n * Sets the bottom position of the overlay. Clears any previously set vertical position.\n * @param value New bottom offset.\n */\n bottom(value = '') {\n this._topOffset = '';\n this._bottomOffset = value;\n this._alignItems = 'flex-end';\n return this;\n }\n /**\n * Sets the right position of the overlay. Clears any previously set horizontal position.\n * @param value New right offset.\n */\n right(value = '') {\n this._leftOffset = '';\n this._rightOffset = value;\n this._justifyContent = 'flex-end';\n return this;\n }\n /**\n * Sets the overlay width and clears any previously set width.\n * @param value New width for the overlay\n * @deprecated Pass the `width` through the `OverlayConfig`.\n * @breaking-change 8.0.0\n */\n width(value = '') {\n if (this._overlayRef) {\n this._overlayRef.updateSize({ width: value });\n }\n else {\n this._width = value;\n }\n return this;\n }\n /**\n * Sets the overlay height and clears any previously set height.\n * @param value New height for the overlay\n * @deprecated Pass the `height` through the `OverlayConfig`.\n * @breaking-change 8.0.0\n */\n height(value = '') {\n if (this._overlayRef) {\n this._overlayRef.updateSize({ height: value });\n }\n else {\n this._height = value;\n }\n return this;\n }\n /**\n * Centers the overlay horizontally with an optional offset.\n * Clears any previously set horizontal position.\n *\n * @param offset Overlay offset from the horizontal center.\n */\n centerHorizontally(offset = '') {\n this.left(offset);\n this._justifyContent = 'center';\n return this;\n }\n /**\n * Centers the overlay vertically with an optional offset.\n * Clears any previously set vertical position.\n *\n * @param offset Overlay offset from the vertical center.\n */\n centerVertically(offset = '') {\n this.top(offset);\n this._alignItems = 'center';\n return this;\n }\n /**\n * Apply the position to the element.\n * @docs-private\n */\n apply() {\n // Since the overlay ref applies the strategy asynchronously, it could\n // have been disposed before it ends up being applied. If that is the\n // case, we shouldn't do anything.\n if (!this._overlayRef || !this._overlayRef.hasAttached()) {\n return;\n }\n const styles = this._overlayRef.overlayElement.style;\n const parentStyles = this._overlayRef.hostElement.style;\n const config = this._overlayRef.getConfig();\n const { width, height, maxWidth, maxHeight } = config;\n const shouldBeFlushHorizontally = (width === '100%' || width === '100vw') &&\n (!maxWidth || maxWidth === '100%' || maxWidth === '100vw');\n const shouldBeFlushVertically = (height === '100%' || height === '100vh') &&\n (!maxHeight || maxHeight === '100%' || maxHeight === '100vh');\n styles.position = this._cssPosition;\n styles.marginLeft = shouldBeFlushHorizontally ? '0' : this._leftOffset;\n styles.marginTop = shouldBeFlushVertically ? '0' : this._topOffset;\n styles.marginBottom = this._bottomOffset;\n styles.marginRight = this._rightOffset;\n if (shouldBeFlushHorizontally) {\n parentStyles.justifyContent = 'flex-start';\n }\n else if (this._justifyContent === 'center') {\n parentStyles.justifyContent = 'center';\n }\n else if (this._overlayRef.getConfig().direction === 'rtl') {\n // In RTL the browser will invert `flex-start` and `flex-end` automatically, but we\n // don't want that because our positioning is explicitly `left` and `right`, hence\n // why we do another inversion to ensure that the overlay stays in the same position.\n // TODO: reconsider this if we add `start` and `end` methods.\n if (this._justifyContent === 'flex-start') {\n parentStyles.justifyContent = 'flex-end';\n }\n else if (this._justifyContent === 'flex-end') {\n parentStyles.justifyContent = 'flex-start';\n }\n }\n else {\n parentStyles.justifyContent = this._justifyContent;\n }\n parentStyles.alignItems = shouldBeFlushVertically ? 'flex-start' : this._alignItems;\n }\n /**\n * Cleans up the DOM changes from the position strategy.\n * @docs-private\n */\n dispose() {\n if (this._isDisposed || !this._overlayRef) {\n return;\n }\n const styles = this._overlayRef.overlayElement.style;\n const parent = this._overlayRef.hostElement;\n const parentStyles = parent.style;\n parent.classList.remove(wrapperClass);\n parentStyles.justifyContent =\n parentStyles.alignItems =\n styles.marginTop =\n styles.marginBottom =\n styles.marginLeft =\n styles.marginRight =\n styles.position =\n '';\n this._overlayRef = null;\n this._isDisposed = true;\n }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** Builder for overlay position strategy. */\nclass OverlayPositionBuilder {\n constructor(_viewportRuler, _document, _platform, _overlayContainer) {\n this._viewportRuler = _viewportRuler;\n this._document = _document;\n this._platform = _platform;\n this._overlayContainer = _overlayContainer;\n }\n /**\n * Creates a global position strategy.\n */\n global() {\n return new GlobalPositionStrategy();\n }\n /**\n * Creates a flexible position strategy.\n * @param origin Origin relative to which to position the overlay.\n */\n flexibleConnectedTo(origin) {\n return new FlexibleConnectedPositionStrategy(origin, this._viewportRuler, this._document, this._platform, this._overlayContainer);\n }\n}\nOverlayPositionBuilder.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayPositionBuilder, deps: [{ token: i1.ViewportRuler }, { token: DOCUMENT }, { token: i1$1.Platform }, { token: OverlayContainer }], target: i0.ɵɵFactoryTarget.Injectable });\nOverlayPositionBuilder.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayPositionBuilder, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayPositionBuilder, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: i1.ViewportRuler }, { type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }, { type: i1$1.Platform }, { type: OverlayContainer }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** Next overlay unique ID. */\nlet nextUniqueId = 0;\n// Note that Overlay is *not* scoped to the app root because of the ComponentFactoryResolver\n// which needs to be different depending on where OverlayModule is imported.\n/**\n * Service to create Overlays. Overlays are dynamically added pieces of floating UI, meant to be\n * used as a low-level building block for other components. Dialogs, tooltips, menus,\n * selects, etc. can all be built using overlays. The service should primarily be used by authors\n * of re-usable components rather than developers building end-user applications.\n *\n * An overlay *is* a PortalOutlet, so any kind of Portal can be loaded into one.\n */\nclass Overlay {\n constructor(\n /** Scrolling strategies that can be used when creating an overlay. */\n scrollStrategies, _overlayContainer, _componentFactoryResolver, _positionBuilder, _keyboardDispatcher, _injector, _ngZone, _document, _directionality, _location, _outsideClickDispatcher) {\n this.scrollStrategies = scrollStrategies;\n this._overlayContainer = _overlayContainer;\n this._componentFactoryResolver = _componentFactoryResolver;\n this._positionBuilder = _positionBuilder;\n this._keyboardDispatcher = _keyboardDispatcher;\n this._injector = _injector;\n this._ngZone = _ngZone;\n this._document = _document;\n this._directionality = _directionality;\n this._location = _location;\n this._outsideClickDispatcher = _outsideClickDispatcher;\n }\n /**\n * Creates an overlay.\n * @param config Configuration applied to the overlay.\n * @returns Reference to the created overlay.\n */\n create(config) {\n const host = this._createHostElement();\n const pane = this._createPaneElement(host);\n const portalOutlet = this._createPortalOutlet(pane);\n const overlayConfig = new OverlayConfig(config);\n overlayConfig.direction = overlayConfig.direction || this._directionality.value;\n return new OverlayRef(portalOutlet, host, pane, overlayConfig, this._ngZone, this._keyboardDispatcher, this._document, this._location, this._outsideClickDispatcher);\n }\n /**\n * Gets a position builder that can be used, via fluent API,\n * to construct and configure a position strategy.\n * @returns An overlay position builder.\n */\n position() {\n return this._positionBuilder;\n }\n /**\n * Creates the DOM element for an overlay and appends it to the overlay container.\n * @returns Newly-created pane element\n */\n _createPaneElement(host) {\n const pane = this._document.createElement('div');\n pane.id = `cdk-overlay-${nextUniqueId++}`;\n pane.classList.add('cdk-overlay-pane');\n host.appendChild(pane);\n return pane;\n }\n /**\n * Creates the host element that wraps around an overlay\n * and can be used for advanced positioning.\n * @returns Newly-create host element.\n */\n _createHostElement() {\n const host = this._document.createElement('div');\n this._overlayContainer.getContainerElement().appendChild(host);\n return host;\n }\n /**\n * Create a DomPortalOutlet into which the overlay content can be loaded.\n * @param pane The DOM element to turn into a portal outlet.\n * @returns A portal outlet for the given DOM element.\n */\n _createPortalOutlet(pane) {\n // We have to resolve the ApplicationRef later in order to allow people\n // to use overlay-based providers during app initialization.\n if (!this._appRef) {\n this._appRef = this._injector.get(ApplicationRef);\n }\n return new DomPortalOutlet(pane, this._componentFactoryResolver, this._appRef, this._injector, this._document);\n }\n}\nOverlay.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: Overlay, deps: [{ token: ScrollStrategyOptions }, { token: OverlayContainer }, { token: i0.ComponentFactoryResolver }, { token: OverlayPositionBuilder }, { token: OverlayKeyboardDispatcher }, { token: i0.Injector }, { token: i0.NgZone }, { token: DOCUMENT }, { token: i5.Directionality }, { token: i6.Location }, { token: OverlayOutsideClickDispatcher }], target: i0.ɵɵFactoryTarget.Injectable });\nOverlay.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: Overlay });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: Overlay, decorators: [{\n type: Injectable\n }], ctorParameters: function () { return [{ type: ScrollStrategyOptions }, { type: OverlayContainer }, { type: i0.ComponentFactoryResolver }, { type: OverlayPositionBuilder }, { type: OverlayKeyboardDispatcher }, { type: i0.Injector }, { type: i0.NgZone }, { type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }, { type: i5.Directionality }, { type: i6.Location }, { type: OverlayOutsideClickDispatcher }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** Default set of positions for the overlay. Follows the behavior of a dropdown. */\nconst defaultPositionList = [\n {\n originX: 'start',\n originY: 'bottom',\n overlayX: 'start',\n overlayY: 'top',\n },\n {\n originX: 'start',\n originY: 'top',\n overlayX: 'start',\n overlayY: 'bottom',\n },\n {\n originX: 'end',\n originY: 'top',\n overlayX: 'end',\n overlayY: 'bottom',\n },\n {\n originX: 'end',\n originY: 'bottom',\n overlayX: 'end',\n overlayY: 'top',\n },\n];\n/** Injection token that determines the scroll handling while the connected overlay is open. */\nconst CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY = new InjectionToken('cdk-connected-overlay-scroll-strategy');\n/**\n * Directive applied to an element to make it usable as an origin for an Overlay using a\n * ConnectedPositionStrategy.\n */\nclass CdkOverlayOrigin {\n constructor(\n /** Reference to the element on which the directive is applied. */\n elementRef) {\n this.elementRef = elementRef;\n }\n}\nCdkOverlayOrigin.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkOverlayOrigin, deps: [{ token: i0.ElementRef }], target: i0.ɵɵFactoryTarget.Directive });\nCdkOverlayOrigin.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: CdkOverlayOrigin, selector: \"[cdk-overlay-origin], [overlay-origin], [cdkOverlayOrigin]\", exportAs: [\"cdkOverlayOrigin\"], ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkOverlayOrigin, decorators: [{\n type: Directive,\n args: [{\n selector: '[cdk-overlay-origin], [overlay-origin], [cdkOverlayOrigin]',\n exportAs: 'cdkOverlayOrigin',\n }]\n }], ctorParameters: function () { return [{ type: i0.ElementRef }]; } });\n/**\n * Directive to facilitate declarative creation of an\n * Overlay using a FlexibleConnectedPositionStrategy.\n */\nclass CdkConnectedOverlay {\n // TODO(jelbourn): inputs for size, scroll behavior, animation, etc.\n constructor(_overlay, templateRef, viewContainerRef, scrollStrategyFactory, _dir) {\n this._overlay = _overlay;\n this._dir = _dir;\n this._hasBackdrop = false;\n this._lockPosition = false;\n this._growAfterOpen = false;\n this._flexibleDimensions = false;\n this._push = false;\n this._backdropSubscription = Subscription.EMPTY;\n this._attachSubscription = Subscription.EMPTY;\n this._detachSubscription = Subscription.EMPTY;\n this._positionSubscription = Subscription.EMPTY;\n /** Margin between the overlay and the viewport edges. */\n this.viewportMargin = 0;\n /** Whether the overlay is open. */\n this.open = false;\n /** Whether the overlay can be closed by user interaction. */\n this.disableClose = false;\n /** Event emitted when the backdrop is clicked. */\n this.backdropClick = new EventEmitter();\n /** Event emitted when the position has changed. */\n this.positionChange = new EventEmitter();\n /** Event emitted when the overlay has been attached. */\n this.attach = new EventEmitter();\n /** Event emitted when the overlay has been detached. */\n this.detach = new EventEmitter();\n /** Emits when there are keyboard events that are targeted at the overlay. */\n this.overlayKeydown = new EventEmitter();\n /** Emits when there are mouse outside click events that are targeted at the overlay. */\n this.overlayOutsideClick = new EventEmitter();\n this._templatePortal = new TemplatePortal(templateRef, viewContainerRef);\n this._scrollStrategyFactory = scrollStrategyFactory;\n this.scrollStrategy = this._scrollStrategyFactory();\n }\n /** The offset in pixels for the overlay connection point on the x-axis */\n get offsetX() {\n return this._offsetX;\n }\n set offsetX(offsetX) {\n this._offsetX = offsetX;\n if (this._position) {\n this._updatePositionStrategy(this._position);\n }\n }\n /** The offset in pixels for the overlay connection point on the y-axis */\n get offsetY() {\n return this._offsetY;\n }\n set offsetY(offsetY) {\n this._offsetY = offsetY;\n if (this._position) {\n this._updatePositionStrategy(this._position);\n }\n }\n /** Whether or not the overlay should attach a backdrop. */\n get hasBackdrop() {\n return this._hasBackdrop;\n }\n set hasBackdrop(value) {\n this._hasBackdrop = coerceBooleanProperty(value);\n }\n /** Whether or not the overlay should be locked when scrolling. */\n get lockPosition() {\n return this._lockPosition;\n }\n set lockPosition(value) {\n this._lockPosition = coerceBooleanProperty(value);\n }\n /** Whether the overlay's width and height can be constrained to fit within the viewport. */\n get flexibleDimensions() {\n return this._flexibleDimensions;\n }\n set flexibleDimensions(value) {\n this._flexibleDimensions = coerceBooleanProperty(value);\n }\n /** Whether the overlay can grow after the initial open when flexible positioning is turned on. */\n get growAfterOpen() {\n return this._growAfterOpen;\n }\n set growAfterOpen(value) {\n this._growAfterOpen = coerceBooleanProperty(value);\n }\n /** Whether the overlay can be pushed on-screen if none of the provided positions fit. */\n get push() {\n return this._push;\n }\n set push(value) {\n this._push = coerceBooleanProperty(value);\n }\n /** The associated overlay reference. */\n get overlayRef() {\n return this._overlayRef;\n }\n /** The element's layout direction. */\n get dir() {\n return this._dir ? this._dir.value : 'ltr';\n }\n ngOnDestroy() {\n this._attachSubscription.unsubscribe();\n this._detachSubscription.unsubscribe();\n this._backdropSubscription.unsubscribe();\n this._positionSubscription.unsubscribe();\n if (this._overlayRef) {\n this._overlayRef.dispose();\n }\n }\n ngOnChanges(changes) {\n if (this._position) {\n this._updatePositionStrategy(this._position);\n this._overlayRef.updateSize({\n width: this.width,\n minWidth: this.minWidth,\n height: this.height,\n minHeight: this.minHeight,\n });\n if (changes['origin'] && this.open) {\n this._position.apply();\n }\n }\n if (changes['open']) {\n this.open ? this._attachOverlay() : this._detachOverlay();\n }\n }\n /** Creates an overlay */\n _createOverlay() {\n if (!this.positions || !this.positions.length) {\n this.positions = defaultPositionList;\n }\n const overlayRef = (this._overlayRef = this._overlay.create(this._buildConfig()));\n this._attachSubscription = overlayRef.attachments().subscribe(() => this.attach.emit());\n this._detachSubscription = overlayRef.detachments().subscribe(() => this.detach.emit());\n overlayRef.keydownEvents().subscribe((event) => {\n this.overlayKeydown.next(event);\n if (event.keyCode === ESCAPE && !this.disableClose && !hasModifierKey(event)) {\n event.preventDefault();\n this._detachOverlay();\n }\n });\n this._overlayRef.outsidePointerEvents().subscribe((event) => {\n this.overlayOutsideClick.next(event);\n });\n }\n /** Builds the overlay config based on the directive's inputs */\n _buildConfig() {\n const positionStrategy = (this._position =\n this.positionStrategy || this._createPositionStrategy());\n const overlayConfig = new OverlayConfig({\n direction: this._dir,\n positionStrategy,\n scrollStrategy: this.scrollStrategy,\n hasBackdrop: this.hasBackdrop,\n });\n if (this.width || this.width === 0) {\n overlayConfig.width = this.width;\n }\n if (this.height || this.height === 0) {\n overlayConfig.height = this.height;\n }\n if (this.minWidth || this.minWidth === 0) {\n overlayConfig.minWidth = this.minWidth;\n }\n if (this.minHeight || this.minHeight === 0) {\n overlayConfig.minHeight = this.minHeight;\n }\n if (this.backdropClass) {\n overlayConfig.backdropClass = this.backdropClass;\n }\n if (this.panelClass) {\n overlayConfig.panelClass = this.panelClass;\n }\n return overlayConfig;\n }\n /** Updates the state of a position strategy, based on the values of the directive inputs. */\n _updatePositionStrategy(positionStrategy) {\n const positions = this.positions.map(currentPosition => ({\n originX: currentPosition.originX,\n originY: currentPosition.originY,\n overlayX: currentPosition.overlayX,\n overlayY: currentPosition.overlayY,\n offsetX: currentPosition.offsetX || this.offsetX,\n offsetY: currentPosition.offsetY || this.offsetY,\n panelClass: currentPosition.panelClass || undefined,\n }));\n return positionStrategy\n .setOrigin(this._getFlexibleConnectedPositionStrategyOrigin())\n .withPositions(positions)\n .withFlexibleDimensions(this.flexibleDimensions)\n .withPush(this.push)\n .withGrowAfterOpen(this.growAfterOpen)\n .withViewportMargin(this.viewportMargin)\n .withLockedPosition(this.lockPosition)\n .withTransformOriginOn(this.transformOriginSelector);\n }\n /** Returns the position strategy of the overlay to be set on the overlay config */\n _createPositionStrategy() {\n const strategy = this._overlay\n .position()\n .flexibleConnectedTo(this._getFlexibleConnectedPositionStrategyOrigin());\n this._updatePositionStrategy(strategy);\n return strategy;\n }\n _getFlexibleConnectedPositionStrategyOrigin() {\n if (this.origin instanceof CdkOverlayOrigin) {\n return this.origin.elementRef;\n }\n else {\n return this.origin;\n }\n }\n /** Attaches the overlay and subscribes to backdrop clicks if backdrop exists */\n _attachOverlay() {\n if (!this._overlayRef) {\n this._createOverlay();\n }\n else {\n // Update the overlay size, in case the directive's inputs have changed\n this._overlayRef.getConfig().hasBackdrop = this.hasBackdrop;\n }\n if (!this._overlayRef.hasAttached()) {\n this._overlayRef.attach(this._templatePortal);\n }\n if (this.hasBackdrop) {\n this._backdropSubscription = this._overlayRef.backdropClick().subscribe(event => {\n this.backdropClick.emit(event);\n });\n }\n else {\n this._backdropSubscription.unsubscribe();\n }\n this._positionSubscription.unsubscribe();\n // Only subscribe to `positionChanges` if requested, because putting\n // together all the information for it can be expensive.\n if (this.positionChange.observers.length > 0) {\n this._positionSubscription = this._position.positionChanges\n .pipe(takeWhile(() => this.positionChange.observers.length > 0))\n .subscribe(position => {\n this.positionChange.emit(position);\n if (this.positionChange.observers.length === 0) {\n this._positionSubscription.unsubscribe();\n }\n });\n }\n }\n /** Detaches the overlay and unsubscribes to backdrop clicks if backdrop exists */\n _detachOverlay() {\n if (this._overlayRef) {\n this._overlayRef.detach();\n }\n this._backdropSubscription.unsubscribe();\n this._positionSubscription.unsubscribe();\n }\n}\nCdkConnectedOverlay.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkConnectedOverlay, deps: [{ token: Overlay }, { token: i0.TemplateRef }, { token: i0.ViewContainerRef }, { token: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY }, { token: i5.Directionality, optional: true }], target: i0.ɵɵFactoryTarget.Directive });\nCdkConnectedOverlay.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: CdkConnectedOverlay, selector: \"[cdk-connected-overlay], [connected-overlay], [cdkConnectedOverlay]\", inputs: { origin: [\"cdkConnectedOverlayOrigin\", \"origin\"], positions: [\"cdkConnectedOverlayPositions\", \"positions\"], positionStrategy: [\"cdkConnectedOverlayPositionStrategy\", \"positionStrategy\"], offsetX: [\"cdkConnectedOverlayOffsetX\", \"offsetX\"], offsetY: [\"cdkConnectedOverlayOffsetY\", \"offsetY\"], width: [\"cdkConnectedOverlayWidth\", \"width\"], height: [\"cdkConnectedOverlayHeight\", \"height\"], minWidth: [\"cdkConnectedOverlayMinWidth\", \"minWidth\"], minHeight: [\"cdkConnectedOverlayMinHeight\", \"minHeight\"], backdropClass: [\"cdkConnectedOverlayBackdropClass\", \"backdropClass\"], panelClass: [\"cdkConnectedOverlayPanelClass\", \"panelClass\"], viewportMargin: [\"cdkConnectedOverlayViewportMargin\", \"viewportMargin\"], scrollStrategy: [\"cdkConnectedOverlayScrollStrategy\", \"scrollStrategy\"], open: [\"cdkConnectedOverlayOpen\", \"open\"], disableClose: [\"cdkConnectedOverlayDisableClose\", \"disableClose\"], transformOriginSelector: [\"cdkConnectedOverlayTransformOriginOn\", \"transformOriginSelector\"], hasBackdrop: [\"cdkConnectedOverlayHasBackdrop\", \"hasBackdrop\"], lockPosition: [\"cdkConnectedOverlayLockPosition\", \"lockPosition\"], flexibleDimensions: [\"cdkConnectedOverlayFlexibleDimensions\", \"flexibleDimensions\"], growAfterOpen: [\"cdkConnectedOverlayGrowAfterOpen\", \"growAfterOpen\"], push: [\"cdkConnectedOverlayPush\", \"push\"] }, outputs: { backdropClick: \"backdropClick\", positionChange: \"positionChange\", attach: \"attach\", detach: \"detach\", overlayKeydown: \"overlayKeydown\", overlayOutsideClick: \"overlayOutsideClick\" }, exportAs: [\"cdkConnectedOverlay\"], usesOnChanges: true, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkConnectedOverlay, decorators: [{\n type: Directive,\n args: [{\n selector: '[cdk-connected-overlay], [connected-overlay], [cdkConnectedOverlay]',\n exportAs: 'cdkConnectedOverlay',\n }]\n }], ctorParameters: function () { return [{ type: Overlay }, { type: i0.TemplateRef }, { type: i0.ViewContainerRef }, { type: undefined, decorators: [{\n type: Inject,\n args: [CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY]\n }] }, { type: i5.Directionality, decorators: [{\n type: Optional\n }] }]; }, propDecorators: { origin: [{\n type: Input,\n args: ['cdkConnectedOverlayOrigin']\n }], positions: [{\n type: Input,\n args: ['cdkConnectedOverlayPositions']\n }], positionStrategy: [{\n type: Input,\n args: ['cdkConnectedOverlayPositionStrategy']\n }], offsetX: [{\n type: Input,\n args: ['cdkConnectedOverlayOffsetX']\n }], offsetY: [{\n type: Input,\n args: ['cdkConnectedOverlayOffsetY']\n }], width: [{\n type: Input,\n args: ['cdkConnectedOverlayWidth']\n }], height: [{\n type: Input,\n args: ['cdkConnectedOverlayHeight']\n }], minWidth: [{\n type: Input,\n args: ['cdkConnectedOverlayMinWidth']\n }], minHeight: [{\n type: Input,\n args: ['cdkConnectedOverlayMinHeight']\n }], backdropClass: [{\n type: Input,\n args: ['cdkConnectedOverlayBackdropClass']\n }], panelClass: [{\n type: Input,\n args: ['cdkConnectedOverlayPanelClass']\n }], viewportMargin: [{\n type: Input,\n args: ['cdkConnectedOverlayViewportMargin']\n }], scrollStrategy: [{\n type: Input,\n args: ['cdkConnectedOverlayScrollStrategy']\n }], open: [{\n type: Input,\n args: ['cdkConnectedOverlayOpen']\n }], disableClose: [{\n type: Input,\n args: ['cdkConnectedOverlayDisableClose']\n }], transformOriginSelector: [{\n type: Input,\n args: ['cdkConnectedOverlayTransformOriginOn']\n }], hasBackdrop: [{\n type: Input,\n args: ['cdkConnectedOverlayHasBackdrop']\n }], lockPosition: [{\n type: Input,\n args: ['cdkConnectedOverlayLockPosition']\n }], flexibleDimensions: [{\n type: Input,\n args: ['cdkConnectedOverlayFlexibleDimensions']\n }], growAfterOpen: [{\n type: Input,\n args: ['cdkConnectedOverlayGrowAfterOpen']\n }], push: [{\n type: Input,\n args: ['cdkConnectedOverlayPush']\n }], backdropClick: [{\n type: Output\n }], positionChange: [{\n type: Output\n }], attach: [{\n type: Output\n }], detach: [{\n type: Output\n }], overlayKeydown: [{\n type: Output\n }], overlayOutsideClick: [{\n type: Output\n }] } });\n/** @docs-private */\nfunction CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay) {\n return () => overlay.scrollStrategies.reposition();\n}\n/** @docs-private */\nconst CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER = {\n provide: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY,\n deps: [Overlay],\n useFactory: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY,\n};\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass OverlayModule {\n}\nOverlayModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nOverlayModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayModule, declarations: [CdkConnectedOverlay, CdkOverlayOrigin], imports: [BidiModule, PortalModule, ScrollingModule], exports: [CdkConnectedOverlay, CdkOverlayOrigin, ScrollingModule] });\nOverlayModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayModule, providers: [Overlay, CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER], imports: [[BidiModule, PortalModule, ScrollingModule], ScrollingModule] });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: OverlayModule, decorators: [{\n type: NgModule,\n args: [{\n imports: [BidiModule, PortalModule, ScrollingModule],\n exports: [CdkConnectedOverlay, CdkOverlayOrigin, ScrollingModule],\n declarations: [CdkConnectedOverlay, CdkOverlayOrigin],\n providers: [Overlay, CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER],\n }]\n }] });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Alternative to OverlayContainer that supports correct displaying of overlay elements in\n * Fullscreen mode\n * https://developer.mozilla.org/en-US/docs/Web/API/Element/requestFullScreen\n *\n * Should be provided in the root component.\n */\nclass FullscreenOverlayContainer extends OverlayContainer {\n constructor(_document, platform) {\n super(_document, platform);\n }\n ngOnDestroy() {\n super.ngOnDestroy();\n if (this._fullScreenEventName && this._fullScreenListener) {\n this._document.removeEventListener(this._fullScreenEventName, this._fullScreenListener);\n }\n }\n _createContainer() {\n super._createContainer();\n this._adjustParentForFullscreenChange();\n this._addFullscreenChangeListener(() => this._adjustParentForFullscreenChange());\n }\n _adjustParentForFullscreenChange() {\n if (!this._containerElement) {\n return;\n }\n const fullscreenElement = this.getFullscreenElement();\n const parent = fullscreenElement || this._document.body;\n parent.appendChild(this._containerElement);\n }\n _addFullscreenChangeListener(fn) {\n const eventName = this._getEventName();\n if (eventName) {\n if (this._fullScreenListener) {\n this._document.removeEventListener(eventName, this._fullScreenListener);\n }\n this._document.addEventListener(eventName, fn);\n this._fullScreenListener = fn;\n }\n }\n _getEventName() {\n if (!this._fullScreenEventName) {\n const _document = this._document;\n if (_document.fullscreenEnabled) {\n this._fullScreenEventName = 'fullscreenchange';\n }\n else if (_document.webkitFullscreenEnabled) {\n this._fullScreenEventName = 'webkitfullscreenchange';\n }\n else if (_document.mozFullScreenEnabled) {\n this._fullScreenEventName = 'mozfullscreenchange';\n }\n else if (_document.msFullscreenEnabled) {\n this._fullScreenEventName = 'MSFullscreenChange';\n }\n }\n return this._fullScreenEventName;\n }\n /**\n * When the page is put into fullscreen mode, a specific element is specified.\n * Only that element and its children are visible when in fullscreen mode.\n */\n getFullscreenElement() {\n const _document = this._document;\n return (_document.fullscreenElement ||\n _document.webkitFullscreenElement ||\n _document.mozFullScreenElement ||\n _document.msFullscreenElement ||\n null);\n }\n}\nFullscreenOverlayContainer.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: FullscreenOverlayContainer, deps: [{ token: DOCUMENT }, { token: i1$1.Platform }], target: i0.ɵɵFactoryTarget.Injectable });\nFullscreenOverlayContainer.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: FullscreenOverlayContainer, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: FullscreenOverlayContainer, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }, { type: i1$1.Platform }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { BlockScrollStrategy, CdkConnectedOverlay, CdkOverlayOrigin, CloseScrollStrategy, ConnectedOverlayPositionChange, ConnectionPositionPair, FlexibleConnectedPositionStrategy, FullscreenOverlayContainer, GlobalPositionStrategy, NoopScrollStrategy, Overlay, OverlayConfig, OverlayContainer, OverlayKeyboardDispatcher, OverlayModule, OverlayOutsideClickDispatcher, OverlayPositionBuilder, OverlayRef, RepositionScrollStrategy, ScrollStrategyOptions, ScrollingVisibility, validateHorizontalPosition, validateVerticalPosition };\n","import { 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 * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * 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}\nMutationObserverFactory.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MutationObserverFactory, deps: [], target: i0.ɵɵFactoryTarget.Injectable });\nMutationObserverFactory.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MutationObserverFactory, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MutationObserverFactory, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\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, { observer, stream, 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 { observer, stream } = this._observedElements.get(element);\n if (observer) {\n observer.disconnect();\n }\n stream.complete();\n this._observedElements.delete(element);\n }\n }\n}\nContentObserver.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ContentObserver, deps: [{ token: MutationObserverFactory }], target: i0.ɵɵFactoryTarget.Injectable });\nContentObserver.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ContentObserver, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ContentObserver, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: MutationObserverFactory }]; } });\n/**\n * Directive that triggers a callback whenever the content of\n * its associated element has changed.\n */\nclass CdkObserveContent {\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 /**\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 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}\nCdkObserveContent.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkObserveContent, deps: [{ token: ContentObserver }, { token: i0.ElementRef }, { token: i0.NgZone }], target: i0.ɵɵFactoryTarget.Directive });\nCdkObserveContent.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: CdkObserveContent, selector: \"[cdkObserveContent]\", inputs: { disabled: [\"cdkObserveContentDisabled\", \"disabled\"], debounce: \"debounce\" }, outputs: { event: \"cdkObserveContent\" }, exportAs: [\"cdkObserveContent\"], ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkObserveContent, decorators: [{\n type: Directive,\n args: [{\n selector: '[cdkObserveContent]',\n exportAs: 'cdkObserveContent',\n }]\n }], ctorParameters: function () { return [{ type: ContentObserver }, { type: i0.ElementRef }, { type: i0.NgZone }]; }, propDecorators: { event: [{\n type: Output,\n args: ['cdkObserveContent']\n }], disabled: [{\n type: Input,\n args: ['cdkObserveContentDisabled']\n }], debounce: [{\n type: Input\n }] } });\nclass ObserversModule {\n}\nObserversModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ObserversModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nObserversModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ObserversModule, declarations: [CdkObserveContent], exports: [CdkObserveContent] });\nObserversModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ObserversModule, providers: [MutationObserverFactory] });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ObserversModule, decorators: [{\n type: NgModule,\n args: [{\n exports: [CdkObserveContent],\n declarations: [CdkObserveContent],\n providers: [MutationObserverFactory],\n }]\n }] });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { CdkObserveContent, ContentObserver, MutationObserverFactory, ObserversModule };\n","import { DOCUMENT } from '@angular/common';\nimport * as i0 from '@angular/core';\nimport { Injectable, Inject, QueryList, Directive, Input, InjectionToken, Optional, EventEmitter, Output, NgModule } from '@angular/core';\nimport { Subject, Subscription, BehaviorSubject, of } from 'rxjs';\nimport { hasModifierKey, A, Z, ZERO, NINE, 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 from '@angular/cdk/platform';\nimport { _getFocusedElementPierceShadowDom, normalizePassiveListenerOptions, _getEventTarget, _getShadowRoot, PlatformModule } from '@angular/cdk/platform';\nimport * as i1$1 from '@angular/cdk/observers';\nimport { ObserversModule } from '@angular/cdk/observers';\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** 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 }\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 * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** ID used for the body container where all messages are appended. */\nconst MESSAGES_CONTAINER_ID = 'cdk-describedby-message-container';\n/** ID prefix used for each created message element. */\nconst CDK_DESCRIBEDBY_ID_PREFIX = 'cdk-describedby-message';\n/** Attribute given to each host element that is described by a message element. */\nconst CDK_DESCRIBEDBY_HOST_ATTRIBUTE = 'cdk-describedby-host';\n/** Global incremental identifier for each registered message element. */\nlet nextId = 0;\n/** Global map of all registered message elements that have been placed into the document. */\nconst messageRegistry = new Map();\n/** Container for all registered messages. */\nlet messagesContainer = null;\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 this._document = _document;\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);\n messageRegistry.set(key, { messageElement: message, referenceCount: 0 });\n }\n else if (!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 = messageRegistry.get(key);\n if (registeredMessage && registeredMessage.referenceCount === 0) {\n this._deleteMessageElement(key);\n }\n }\n if (messagesContainer && messagesContainer.childNodes.length === 0) {\n this._deleteMessagesContainer();\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}]`);\n for (let i = 0; i < describedElements.length; i++) {\n this._removeCdkDescribedByReferenceIds(describedElements[i]);\n describedElements[i].removeAttribute(CDK_DESCRIBEDBY_HOST_ATTRIBUTE);\n }\n if (messagesContainer) {\n this._deleteMessagesContainer();\n }\n 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);\n messageElement.textContent = message;\n if (role) {\n messageElement.setAttribute('role', role);\n }\n this._createMessagesContainer();\n messagesContainer.appendChild(messageElement);\n messageRegistry.set(getKey(message, role), { messageElement, referenceCount: 0 });\n }\n /** Deletes the message element from the global messages container. */\n _deleteMessageElement(key) {\n const registeredMessage = messageRegistry.get(key);\n registeredMessage?.messageElement?.remove();\n messageRegistry.delete(key);\n }\n /** Creates the global container for all aria-describedby messages. */\n _createMessagesContainer() {\n if (!messagesContainer) {\n const preExistingContainer = this._document.getElementById(MESSAGES_CONTAINER_ID);\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 preExistingContainer?.remove();\n messagesContainer = this._document.createElement('div');\n messagesContainer.id = MESSAGES_CONTAINER_ID;\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('cdk-visually-hidden');\n this._document.body.appendChild(messagesContainer);\n }\n }\n /** Deletes the global messages container. */\n _deleteMessagesContainer() {\n if (messagesContainer) {\n messagesContainer.remove();\n messagesContainer = null;\n }\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 = 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, '');\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 = 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 = 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 ? '' : `${message}`.trim();\n const ariaLabel = element.getAttribute('aria-label');\n // We shouldn't set descriptions if they're exactly the same as the `aria-label` of the\n // element, because screen readers will end up reading out the same text twice in a row.\n return trimmedMessage ? !ariaLabel || ariaLabel.trim() !== trimmedMessage : false;\n }\n /** Checks whether a node is an Element node. */\n _isElementNode(element) {\n return element.nodeType === this._document.ELEMENT_NODE;\n }\n}\nAriaDescriber.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: AriaDescriber, deps: [{ token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });\nAriaDescriber.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: AriaDescriber, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: AriaDescriber, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }]; } });\n/** Gets a key that can be used to look messages up in the registry. */\nfunction getKey(message, role) {\n return typeof message === 'string' ? `${role || ''}/${message}` : message;\n}\n/** Assigns a unique ID to an element, if it doesn't have one already. */\nfunction setMessageId(element) {\n if (!element.id) {\n element.id = `${CDK_DESCRIBEDBY_ID_PREFIX}-${nextId++}`;\n }\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * 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 /**\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 _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) &&\n this._items.length &&\n 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\n .pipe(tap(letter => this._pressedLetters.push(letter)), debounceTime(debounceInterval), filter(() => this._pressedLetters.length > 0), map(() => this._pressedLetters.join('')))\n .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) &&\n item.getLabel().toUpperCase().trim().indexOf(inputString) === 0) {\n this.setActiveItem(index);\n break;\n }\n }\n this._pressedLetters = [];\n });\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 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 }\n else {\n return;\n }\n case UP_ARROW:\n if (this._vertical && isModifierAllowed) {\n this.setPreviousItemActive();\n break;\n }\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 }\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 }\n else {\n return;\n }\n case HOME:\n if (this._homeAndEnd && isModifierAllowed) {\n this.setFirstItemActive();\n break;\n }\n else {\n return;\n }\n case END:\n if (this._homeAndEnd && isModifierAllowed) {\n this.setLastItemActive();\n break;\n }\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 }\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\n ? this.setLastItemActive()\n : 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 /**\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}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass 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}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass 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 * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * 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 is 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) &&\n !this.isDisabled(element) &&\n (config?.ignoreVisibility || this.isVisible(element)));\n }\n}\nInteractivityChecker.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: InteractivityChecker, deps: [{ token: i1.Platform }], target: i0.ɵɵFactoryTarget.Injectable });\nInteractivityChecker.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: InteractivityChecker, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: InteractivityChecker, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: i1.Platform }]; } });\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 }\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 ||\n element.offsetHeight ||\n (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' ||\n nodeName === 'select' ||\n nodeName === 'button' ||\n 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' ||\n inputType === 'password' ||\n nodeName === 'select' ||\n 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) ||\n isAnchorWithHref(element) ||\n element.hasAttribute('contenteditable') ||\n 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 * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * 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 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 /** 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 /** 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 let markers = this._element.querySelectorAll(`[cdk-focus-region-${bound}], ` + `[cdkFocusRegion${bound}], ` + `[cdk-focus-${bound}]`);\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}', ` +\n `use 'cdkFocusRegion${bound}' instead. The deprecated ` +\n `attribute will be removed in 8.0.0.`, markers[i]);\n }\n else if (markers[i].hasAttribute(`cdk-focus-region-${bound}`)) {\n console.warn(`Found use of deprecated attribute 'cdk-focus-region-${bound}', ` +\n `use 'cdkFocusRegion${bound}' instead. The deprecated attribute ` +\n `will be removed in 8.0.0.`, markers[i]);\n }\n }\n if (bound == 'start') {\n return markers.length ? markers[0] : this._getFirstTabbableElement(this._element);\n }\n return markers.length\n ? markers[markers.length - 1]\n : 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 (redirectToElement.hasAttribute(`cdk-focus-initial`)) {\n console.warn(`Found use of deprecated attribute 'cdk-focus-initial', ` +\n `use 'cdkFocusInitial' instead. The deprecated attribute ` +\n `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) &&\n !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\n ? this._getFirstTabbableElement(children[i])\n : 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\n ? this._getLastTabbableElement(children[i])\n : 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 }\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}\nFocusTrapFactory.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: FocusTrapFactory, deps: [{ token: InteractivityChecker }, { token: i0.NgZone }, { token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });\nFocusTrapFactory.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: FocusTrapFactory, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: FocusTrapFactory, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: InteractivityChecker }, { type: i0.NgZone }, { type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }]; } });\n/** Directive for trapping focus within a region. */\nclass CdkTrapFocus {\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 /** 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 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 &&\n !autoCaptureChange.firstChange &&\n this.autoCapture &&\n this.focusTrap.hasAttached()) {\n this._captureFocus();\n }\n }\n _captureFocus() {\n this._previouslyFocusedElement = _getFocusedElementPierceShadowDom();\n this.focusTrap.focusInitialElementWhenReady();\n }\n}\nCdkTrapFocus.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkTrapFocus, deps: [{ token: i0.ElementRef }, { token: FocusTrapFactory }, { token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Directive });\nCdkTrapFocus.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: CdkTrapFocus, selector: \"[cdkTrapFocus]\", inputs: { enabled: [\"cdkTrapFocus\", \"enabled\"], autoCapture: [\"cdkTrapFocusAutoCapture\", \"autoCapture\"] }, exportAs: [\"cdkTrapFocus\"], usesOnChanges: true, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkTrapFocus, decorators: [{\n type: Directive,\n args: [{\n selector: '[cdkTrapFocus]',\n exportAs: 'cdkTrapFocus',\n }]\n }], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: FocusTrapFactory }, { type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }]; }, propDecorators: { enabled: [{\n type: Input,\n args: ['cdkTrapFocus']\n }], autoCapture: [{\n type: Input,\n args: ['cdkTrapFocusAutoCapture']\n }] } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * 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 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 /** 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 }\n else {\n this._focusTrapManager.deregister(this);\n }\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/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** The injection token used to specify the inert strategy. */\nconst FOCUS_TRAP_INERT_STRATEGY = new InjectionToken('FOCUS_TRAP_INERT_STRATEGY');\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * 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/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** 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}\nFocusTrapManager.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: FocusTrapManager, deps: [], target: i0.ɵɵFactoryTarget.Injectable });\nFocusTrapManager.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: FocusTrapManager, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: FocusTrapManager, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }] });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** 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 = { defer: false }) {\n let configObject;\n if (typeof config === 'boolean') {\n configObject = { 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}\nConfigurableFocusTrapFactory.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ConfigurableFocusTrapFactory, deps: [{ token: InteractivityChecker }, { token: i0.NgZone }, { token: FocusTrapManager }, { token: DOCUMENT }, { token: FOCUS_TRAP_INERT_STRATEGY, optional: true }], target: i0.ɵɵFactoryTarget.Injectable });\nConfigurableFocusTrapFactory.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ConfigurableFocusTrapFactory, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ConfigurableFocusTrapFactory, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: InteractivityChecker }, { type: i0.NgZone }, { type: FocusTrapManager }, { type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }, { type: undefined, decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [FOCUS_TRAP_INERT_STRATEGY]\n }] }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** 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 both `offsetX` and `offsetY` are\n // zero. Note that there's an edge case where the user could click the 0x0 spot of the screen\n // themselves, but that is unlikely to contain interaction elements. Historically we used to\n // check `event.buttons === 0`, however that no longer works on recent versions of NVDA.\n return event.offsetX === 0 && event.offsetY === 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 &&\n touch.identifier === -1 &&\n (touch.radiusX == null || touch.radiusX === 1) &&\n (touch.radiusY == null || touch.radiusY === 1));\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * 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 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 /** The most recently detected input modality. */\n get mostRecentModality() {\n return this._modality.value;\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}\nInputModalityDetector.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: InputModalityDetector, deps: [{ token: i1.Platform }, { token: i0.NgZone }, { token: DOCUMENT }, { token: INPUT_MODALITY_DETECTOR_OPTIONS, optional: true }], target: i0.ɵɵFactoryTarget.Injectable });\nInputModalityDetector.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: InputModalityDetector, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: InputModalityDetector, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: i1.Platform }, { type: i0.NgZone }, { type: Document, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }, { type: undefined, decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [INPUT_MODALITY_DETECTOR_OPTIONS]\n }] }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\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');\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass 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 }\n else {\n [politeness, duration] = args;\n }\n this.clear();\n clearTimeout(this._previousTimeout);\n if (!politeness) {\n politeness =\n 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 // 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 return new Promise(resolve => {\n clearTimeout(this._previousTimeout);\n this._previousTimeout = setTimeout(() => {\n this._liveElement.textContent = message;\n resolve();\n if (typeof duration === 'number') {\n this._previousTimeout = setTimeout(() => this.clear(), duration);\n }\n }, 100);\n });\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 }\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 this._document.body.appendChild(liveEl);\n return liveEl;\n }\n}\nLiveAnnouncer.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: LiveAnnouncer, deps: [{ token: LIVE_ANNOUNCER_ELEMENT_TOKEN, optional: true }, { token: i0.NgZone }, { token: DOCUMENT }, { token: LIVE_ANNOUNCER_DEFAULT_OPTIONS, optional: true }], target: i0.ɵɵFactoryTarget.Injectable });\nLiveAnnouncer.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: LiveAnnouncer, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: LiveAnnouncer, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: undefined, decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [LIVE_ANNOUNCER_ELEMENT_TOKEN]\n }] }, { type: i0.NgZone }, { type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }, { type: undefined, decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [LIVE_ANNOUNCER_DEFAULT_OPTIONS]\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 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 /** 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 }\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);\n this._previousAnnouncedText = elementText;\n }\n });\n });\n }\n }\n ngOnDestroy() {\n if (this._subscription) {\n this._subscription.unsubscribe();\n }\n }\n}\nCdkAriaLive.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkAriaLive, deps: [{ token: i0.ElementRef }, { token: LiveAnnouncer }, { token: i1$1.ContentObserver }, { token: i0.NgZone }], target: i0.ɵɵFactoryTarget.Directive });\nCdkAriaLive.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: CdkAriaLive, selector: \"[cdkAriaLive]\", inputs: { politeness: [\"cdkAriaLive\", \"politeness\"] }, exportAs: [\"cdkAriaLive\"], ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkAriaLive, decorators: [{\n type: Directive,\n args: [{\n selector: '[cdkAriaLive]',\n exportAs: 'cdkAriaLive',\n }]\n }], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: LiveAnnouncer }, { type: i1$1.ContentObserver }, { type: i0.NgZone }]; }, propDecorators: { politeness: [{\n type: Input,\n args: ['cdkAriaLive']\n }] } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** 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, \n /** @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 = 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 const handler = event.type === 'focus' ? this._onFocus : this._onBlur;\n // We need to walk up the ancestor chain in order to support `checkChildren`.\n for (let element = target; element; element = element.parentElement) {\n handler.call(this, event, element);\n }\n };\n this._document = document;\n this._detectionMode = options?.detectionMode || 0 /* 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 return of(null);\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 }\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 }\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 return this._windowFocused && this._lastFocusOrigin ? this._lastFocusOrigin : '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 /* EVENTUAL */ ||\n !!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 /* 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 ||\n (elementInfo.checkChildren &&\n event.relatedTarget instanceof Node &&\n element.contains(event.relatedTarget))) {\n return;\n }\n this._setClasses(element);\n this._emitOrigin(elementInfo.subject, null);\n }\n _emitOrigin(subject, origin) {\n this._ngZone.run(() => subject.next(origin));\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\n .pipe(takeUntil(this._stopInputModalityDetector))\n .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 }\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.subject, 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}\nFocusMonitor.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: FocusMonitor, deps: [{ token: i0.NgZone }, { token: i1.Platform }, { token: InputModalityDetector }, { token: DOCUMENT, optional: true }, { token: FOCUS_MONITOR_DEFAULT_OPTIONS, optional: true }], target: i0.ɵɵFactoryTarget.Injectable });\nFocusMonitor.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: FocusMonitor, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: FocusMonitor, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: i0.NgZone }, { type: i1.Platform }, { type: InputModalityDetector }, { type: undefined, decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [DOCUMENT]\n }] }, { type: undefined, decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [FOCUS_MONITOR_DEFAULT_OPTIONS]\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.cdkFocusChange = new EventEmitter();\n }\n ngAfterViewInit() {\n const element = this._elementRef.nativeElement;\n this._monitorSubscription = this._focusMonitor\n .monitor(element, element.nodeType === 1 && element.hasAttribute('cdkMonitorSubtreeFocus'))\n .subscribe(origin => this.cdkFocusChange.emit(origin));\n }\n ngOnDestroy() {\n this._focusMonitor.stopMonitoring(this._elementRef);\n if (this._monitorSubscription) {\n this._monitorSubscription.unsubscribe();\n }\n }\n}\nCdkMonitorFocus.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkMonitorFocus, deps: [{ token: i0.ElementRef }, { token: FocusMonitor }], target: i0.ɵɵFactoryTarget.Directive });\nCdkMonitorFocus.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: CdkMonitorFocus, selector: \"[cdkMonitorElementFocus], [cdkMonitorSubtreeFocus]\", outputs: { cdkFocusChange: \"cdkFocusChange\" }, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: CdkMonitorFocus, decorators: [{\n type: Directive,\n args: [{\n selector: '[cdkMonitorElementFocus], [cdkMonitorSubtreeFocus]',\n }]\n }], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: FocusMonitor }]; }, propDecorators: { cdkFocusChange: [{\n type: Output\n }] } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** 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 }\n /** Gets the current high-contrast-mode for the page. */\n getHighContrastMode() {\n if (!this._platform.isBrowser) {\n return 0 /* 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\n ? documentWindow.getComputedStyle(testElement)\n : null;\n const computedColor = ((computedStyle && computedStyle.backgroundColor) || '').replace(/ /g, '');\n testElement.remove();\n switch (computedColor) {\n case 'rgb(0,0,0)':\n return 2 /* WHITE_ON_BLACK */;\n case 'rgb(255,255,255)':\n return 1 /* BLACK_ON_WHITE */;\n }\n return 0 /* NONE */;\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 // IE11 doesn't support `classList` operations with multiple arguments\n bodyClasses.remove(HIGH_CONTRAST_MODE_ACTIVE_CSS_CLASS);\n bodyClasses.remove(BLACK_ON_WHITE_CSS_CLASS);\n bodyClasses.remove(WHITE_ON_BLACK_CSS_CLASS);\n this._hasCheckedHighContrastMode = true;\n const mode = this.getHighContrastMode();\n if (mode === 1 /* BLACK_ON_WHITE */) {\n bodyClasses.add(HIGH_CONTRAST_MODE_ACTIVE_CSS_CLASS);\n bodyClasses.add(BLACK_ON_WHITE_CSS_CLASS);\n }\n else if (mode === 2 /* WHITE_ON_BLACK */) {\n bodyClasses.add(HIGH_CONTRAST_MODE_ACTIVE_CSS_CLASS);\n bodyClasses.add(WHITE_ON_BLACK_CSS_CLASS);\n }\n }\n }\n}\nHighContrastModeDetector.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: HighContrastModeDetector, deps: [{ token: i1.Platform }, { token: DOCUMENT }], target: i0.ɵɵFactoryTarget.Injectable });\nHighContrastModeDetector.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: HighContrastModeDetector, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: HighContrastModeDetector, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }], ctorParameters: function () { return [{ type: i1.Platform }, { type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass A11yModule {\n constructor(highContrastModeDetector) {\n highContrastModeDetector._applyBodyHighContrastModeCssClasses();\n }\n}\nA11yModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: A11yModule, deps: [{ token: HighContrastModeDetector }], target: i0.ɵɵFactoryTarget.NgModule });\nA11yModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: A11yModule, declarations: [CdkAriaLive, CdkTrapFocus, CdkMonitorFocus], imports: [PlatformModule, ObserversModule], exports: [CdkAriaLive, CdkTrapFocus, CdkMonitorFocus] });\nA11yModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: A11yModule, imports: [[PlatformModule, ObserversModule]] });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: A11yModule, decorators: [{\n type: NgModule,\n args: [{\n imports: [PlatformModule, ObserversModule],\n declarations: [CdkAriaLive, CdkTrapFocus, CdkMonitorFocus],\n exports: [CdkAriaLive, CdkTrapFocus, CdkMonitorFocus],\n }]\n }], ctorParameters: function () { return [{ type: HighContrastModeDetector }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { 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, isFakeMousedownFromScreenReader, isFakeTouchstartFromScreenReader };\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst 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 * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * 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 * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { 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 { Version } from '@angular/core';\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** Current version of the Angular Component Development Kit. */\nconst VERSION = new Version('13.0.0');\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport { VERSION };\n","import * as i0 from '@angular/core';\nimport { Version, InjectionToken, isDevMode, NgModule, Optional, Inject, inject, LOCALE_ID, Injectable, Directive, Input, Component, ViewEncapsulation, ChangeDetectionStrategy, EventEmitter, Output } 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$2 } from '@angular/cdk';\nimport * as i3 from '@angular/common';\nimport { DOCUMENT, CommonModule } from '@angular/common';\nimport * as i1$1 from '@angular/cdk/platform';\nimport { _isTestEnvironment, PlatformModule, normalizePassiveListenerOptions } from '@angular/cdk/platform';\nimport { coerceBooleanProperty, coerceNumberProperty, coerceElement } from '@angular/cdk/coercion';\nimport { Subject, Observable } 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/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** Current version of Angular Material. */\nconst VERSION$1 = new Version('13.0.0');\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** @docs-private */\nclass AnimationCurves {\n}\nAnimationCurves.STANDARD_CURVE = 'cubic-bezier(0.4,0.0,0.2,1)';\nAnimationCurves.DECELERATION_CURVE = 'cubic-bezier(0.0,0.0,0.2,1)';\nAnimationCurves.ACCELERATION_CURVE = 'cubic-bezier(0.4,0.0,1,1)';\nAnimationCurves.SHARP_CURVE = 'cubic-bezier(0.4,0.0,0.6,1)';\n/** @docs-private */\nclass AnimationDurations {\n}\nAnimationDurations.COMPLEX = '375ms';\nAnimationDurations.ENTERING = '225ms';\nAnimationDurations.EXITING = '195ms';\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n// Private version constant to circumvent test/build issues,\n// i.e. avoid core to depend on the @angular/material primary entry-point\n// Can be removed once the Material primary entry-point no longer\n// re-exports all secondary entry-points\nconst VERSION = new Version('13.0.0');\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 /** Whether we've done the global sanity checks (e.g. a theme is loaded, there is a doctype). */\n this._hasDoneGlobalChecks = false;\n this._document = document;\n // While A11yModule also does this, we repeat it here to avoid importing A11yModule\n // in MatCommonModule.\n highContrastModeDetector._applyBodyHighContrastModeCssClasses();\n // Note that `_sanityChecks` is typed to `any`, because AoT\n // throws an error if we use the `SanityChecks` type directly.\n this._sanityChecks = sanityChecks;\n if (!this._hasDoneGlobalChecks) {\n this._checkDoctypeIsDefined();\n this._checkThemeIsPresent();\n this._checkCdkVersionMatch();\n this._hasDoneGlobalChecks = true;\n }\n }\n /** Gets whether a specific sanity check is enabled. */\n _checkIsEnabled(name) {\n // TODO(crisbeto): we can't use `ngDevMode` here yet, because ViewEngine apps might not support\n // it. Since these checks can have performance implications and they aren't tree shakeable\n // in their current form, we can leave the `isDevMode` check in for now.\n // tslint:disable-next-line:ban\n if (!isDevMode() || _isTestEnvironment()) {\n return false;\n }\n if (typeof this._sanityChecks === 'boolean') {\n return this._sanityChecks;\n }\n return !!this._sanityChecks[name];\n }\n _checkDoctypeIsDefined() {\n if (this._checkIsEnabled('doctype') && !this._document.doctype) {\n console.warn('Current document does not have a doctype. This may cause ' +\n 'some Angular Material components not to behave as expected.');\n }\n }\n _checkThemeIsPresent() {\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 (!this._checkIsEnabled('theme') ||\n !this._document.body ||\n typeof getComputedStyle !== 'function') {\n return;\n }\n const testElement = this._document.createElement('div');\n testElement.classList.add('mat-theme-loaded-marker');\n this._document.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 ' +\n 'components may not work as expected. For more info refer ' +\n '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 */\n _checkCdkVersionMatch() {\n if (this._checkIsEnabled('version') && VERSION.full !== VERSION$2.full) {\n console.warn('The Angular Material version (' +\n VERSION.full +\n ') does not match ' +\n 'the Angular CDK version (' +\n VERSION$2.full +\n ').\\n' +\n 'Please ensure the versions of these two packages exactly match.');\n }\n }\n}\nMatCommonModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatCommonModule, deps: [{ token: i1.HighContrastModeDetector }, { token: MATERIAL_SANITY_CHECKS, optional: true }, { token: DOCUMENT }], target: i0.ɵɵFactoryTarget.NgModule });\nMatCommonModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatCommonModule, imports: [BidiModule], exports: [BidiModule] });\nMatCommonModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatCommonModule, imports: [[BidiModule], BidiModule] });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatCommonModule, decorators: [{\n type: NgModule,\n args: [{\n imports: [BidiModule],\n exports: [BidiModule],\n }]\n }], ctorParameters: function () { return [{ type: i1.HighContrastModeDetector }, { type: undefined, decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [MATERIAL_SANITY_CHECKS]\n }] }, { type: undefined, decorators: [{\n type: Inject,\n args: [DOCUMENT]\n }] }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction mixinDisabled(base) {\n return class extends base {\n constructor(...args) {\n super(...args);\n this._disabled = false;\n }\n get disabled() {\n return this._disabled;\n }\n set disabled(value) {\n this._disabled = coerceBooleanProperty(value);\n }\n };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction mixinColor(base, defaultColor) {\n return class extends base {\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 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 };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction mixinDisableRipple(base) {\n return class extends base {\n constructor(...args) {\n super(...args);\n this._disableRipple = false;\n }\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 };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction mixinTabIndex(base, defaultTabIndex = 0) {\n return class extends base {\n constructor(...args) {\n super(...args);\n this._tabIndex = defaultTabIndex;\n this.defaultTabIndex = defaultTabIndex;\n }\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 };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nfunction mixinErrorState(base) {\n return class extends base {\n constructor(...args) {\n super(...args);\n // This class member exists as an interop with `MatFormFieldControl` which expects\n // a public `stateChanges` observable to emit whenever the form field should be updated.\n // The description is not specifically mentioning the error state, as classes using this\n // mixin can/should emit an event in other cases too.\n /** Emits whenever the component state changes. */\n this.stateChanges = new Subject();\n /** Whether the component is in an error state. */\n this.errorState = false;\n }\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 };\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** 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 }\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 ' +\n '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/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** 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) ||\n this.getMonth(first) - this.getMonth(second) ||\n 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}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst MAT_DATE_FORMATS = new InjectionToken('mat-date-formats');\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * 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, { month: style, timeZone: 'utc' });\n return range(12, i => this._format(dtf, new Date(2017, i, 1)));\n }\n getDateNames() {\n const dtf = new Intl.DateTimeFormat(this.locale, { day: 'numeric', timeZone: 'utc' });\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, { weekday: style, timeZone: 'utc' });\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, { year: 'numeric', timeZone: 'utc' });\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) {\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, { ...displayFormat, timeZone: 'utc' });\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 [\n date.getUTCFullYear(),\n this._2digit(date.getUTCMonth() + 1),\n this._2digit(date.getUTCDate()),\n ].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, containg 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}\nNativeDateAdapter.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: NativeDateAdapter, deps: [{ token: MAT_DATE_LOCALE, optional: true }, { token: i1$1.Platform }], target: i0.ɵɵFactoryTarget.Injectable });\nNativeDateAdapter.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: NativeDateAdapter });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: NativeDateAdapter, decorators: [{\n type: Injectable\n }], ctorParameters: function () { return [{ type: undefined, decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [MAT_DATE_LOCALE]\n }] }, { type: i1$1.Platform }]; } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nconst MAT_NATIVE_DATE_FORMATS = {\n parse: {\n dateInput: null,\n },\n display: {\n dateInput: { year: 'numeric', month: 'numeric', day: 'numeric' },\n monthYearLabel: { year: 'numeric', month: 'short' },\n dateA11yLabel: { year: 'numeric', month: 'long', day: 'numeric' },\n monthYearA11yLabel: { year: 'numeric', month: 'long' },\n },\n};\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass NativeDateModule {\n}\nNativeDateModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: NativeDateModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nNativeDateModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: NativeDateModule, imports: [PlatformModule] });\nNativeDateModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: NativeDateModule, providers: [{ provide: DateAdapter, useClass: NativeDateAdapter }], imports: [[PlatformModule]] });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: NativeDateModule, decorators: [{\n type: NgModule,\n args: [{\n imports: [PlatformModule],\n providers: [{ provide: DateAdapter, useClass: NativeDateAdapter }],\n }]\n }] });\nclass MatNativeDateModule {\n}\nMatNativeDateModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatNativeDateModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nMatNativeDateModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatNativeDateModule, imports: [NativeDateModule] });\nMatNativeDateModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatNativeDateModule, providers: [{ provide: MAT_DATE_FORMATS, useValue: MAT_NATIVE_DATE_FORMATS }], imports: [[NativeDateModule]] });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatNativeDateModule, decorators: [{\n type: NgModule,\n args: [{\n imports: [NativeDateModule],\n providers: [{ provide: MAT_DATE_FORMATS, useValue: MAT_NATIVE_DATE_FORMATS }],\n }]\n }] });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** 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}\nShowOnDirtyErrorStateMatcher.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ShowOnDirtyErrorStateMatcher, deps: [], target: i0.ɵɵFactoryTarget.Injectable });\nShowOnDirtyErrorStateMatcher.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ShowOnDirtyErrorStateMatcher });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ShowOnDirtyErrorStateMatcher, decorators: [{\n type: Injectable\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}\nErrorStateMatcher.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ErrorStateMatcher, deps: [], target: i0.ɵɵFactoryTarget.Injectable });\nErrorStateMatcher.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ErrorStateMatcher, providedIn: 'root' });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: ErrorStateMatcher, decorators: [{\n type: Injectable,\n args: [{ providedIn: 'root' }]\n }] });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * 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}\nMatLine.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatLine, deps: [], target: i0.ɵɵFactoryTarget.Directive });\nMatLine.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: MatLine, selector: \"[mat-line], [matLine]\", host: { classAttribute: \"mat-line\" }, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatLine, decorators: [{\n type: Directive,\n args: [{\n selector: '[mat-line], [matLine]',\n host: { 'class': 'mat-line' },\n }]\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(({ length }) => {\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 }\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}\nMatLineModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatLineModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nMatLineModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatLineModule, declarations: [MatLine], imports: [MatCommonModule], exports: [MatLine, MatCommonModule] });\nMatLineModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatLineModule, imports: [[MatCommonModule], MatCommonModule] });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatLineModule, decorators: [{\n type: NgModule,\n args: [{\n imports: [MatCommonModule],\n exports: [MatLine, MatCommonModule],\n declarations: [MatLine],\n }]\n }] });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Reference to a previously launched ripple element.\n */\nclass RippleRef {\n constructor(_renderer, \n /** Reference to the ripple HTML element. */\n element, \n /** Ripple configuration used for the ripple. */\n config) {\n this._renderer = _renderer;\n this.element = element;\n this.config = config;\n /** Current state of the ripple. */\n this.state = 3 /* HIDDEN */;\n }\n /** Fades out the ripple element. */\n fadeOut() {\n this._renderer.fadeOutRipple(this);\n }\n}\n\n// TODO: import these values from `@material/ripple` eventually.\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 that apply to all the event listeners that are bound by the ripple renderer. */\nconst passiveEventOptions = normalizePassiveListenerOptions({ passive: true });\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 constructor(_target, _ngZone, elementOrElementRef, platform) {\n this._target = _target;\n this._ngZone = _ngZone;\n /** Whether the pointer is currently down or not. */\n this._isPointerDown = false;\n /** Set of currently active ripple references. */\n this._activeRipples = new Set();\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 =\n this._containerRect || this._containerElement.getBoundingClientRect());\n const animationConfig = { ...defaultRippleAnimationConfig, ...config.animation };\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 duration = 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 = `${radius * 2}px`;\n // If a custom color has been specified, set it as inline style. If no color is\n // set, the default color will be applied through the ripple theme styles.\n if (config.color != null) {\n ripple.style.backgroundColor = config.color;\n }\n ripple.style.transitionDuration = `${duration}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 because then the `scale` would not animate properly.\n enforceStyleRecalculation(ripple);\n ripple.style.transform = 'scale(1)';\n // Exposed reference to the ripple that will be returned.\n const rippleRef = new RippleRef(this, ripple, config);\n rippleRef.state = 0 /* FADING_IN */;\n // Add the ripple reference to the list of all active ripples.\n this._activeRipples.add(rippleRef);\n if (!config.persistent) {\n this._mostRecentTransientRipple = rippleRef;\n }\n // Wait for the ripple element to be completely faded in.\n // Once it's faded in, the ripple can be hidden immediately if the mouse is released.\n this._runTimeoutOutsideZone(() => {\n const isMostRecentTransientRipple = rippleRef === this._mostRecentTransientRipple;\n rippleRef.state = 1 /* VISIBLE */;\n // When the timer runs out while the user has kept their pointer down, we want to\n // keep only the persistent ripples and the latest transient ripple. We do this,\n // because we don't want stacked transient ripples to appear after their enter\n // animation has finished.\n if (!config.persistent && (!isMostRecentTransientRipple || !this._isPointerDown)) {\n rippleRef.fadeOut();\n }\n }, duration);\n return rippleRef;\n }\n /** Fades out a ripple reference. */\n fadeOutRipple(rippleRef) {\n const wasActive = this._activeRipples.delete(rippleRef);\n if (rippleRef === this._mostRecentTransientRipple) {\n this._mostRecentTransientRipple = null;\n }\n // Clear out the cached bounding rect if we have no more ripples.\n if (!this._activeRipples.size) {\n this._containerRect = null;\n }\n // For ripples that are not active anymore, don't re-run the fade-out animation.\n if (!wasActive) {\n return;\n }\n const rippleEl = rippleRef.element;\n const animationConfig = { ...defaultRippleAnimationConfig, ...rippleRef.config.animation };\n rippleEl.style.transitionDuration = `${animationConfig.exitDuration}ms`;\n rippleEl.style.opacity = '0';\n rippleRef.state = 2 /* FADING_OUT */;\n // Once the ripple faded out, the ripple can be safely removed from the DOM.\n this._runTimeoutOutsideZone(() => {\n rippleRef.state = 3 /* HIDDEN */;\n rippleEl.remove();\n }, animationConfig.exitDuration);\n }\n /** Fades out all currently active ripples. */\n fadeOutAll() {\n this._activeRipples.forEach(ripple => ripple.fadeOut());\n }\n /** Fades out all currently active non-persistent ripples. */\n fadeOutAllNonPersistent() {\n this._activeRipples.forEach(ripple => {\n if (!ripple.config.persistent) {\n ripple.fadeOut();\n }\n });\n }\n /** Sets up the trigger event listeners */\n setupTriggerEvents(elementOrElementRef) {\n const element = coerceElement(elementOrElementRef);\n if (!element || element === this._triggerElement) {\n return;\n }\n // Remove all previously registered event listeners from the trigger element.\n this._removeTriggerEvents();\n this._triggerElement = element;\n this._registerEvents(pointerDownEvents);\n }\n /**\n * Handles all registered events.\n * @docs-private\n */\n handleEvent(event) {\n if (event.type === 'mousedown') {\n this._onMousedown(event);\n }\n else if (event.type === 'touchstart') {\n this._onTouchStart(event);\n }\n else {\n this._onPointerUp();\n }\n // If pointer-up events haven't been registered yet, do so now.\n // We do this on-demand in order to reduce the total number of event listeners\n // registered by the ripples, which speeds up the rendering time for large UIs.\n if (!this._pointerUpEventsRegistered) {\n this._registerEvents(pointerUpEvents);\n this._pointerUpEventsRegistered = true;\n }\n }\n /** Function being called whenever the trigger is being pressed using mouse. */\n _onMousedown(event) {\n // Screen readers will fire fake mouse events for space/enter. Skip launching a\n // ripple in this case for consistency with the non-screen-reader experience.\n const isFakeMousedown = isFakeMousedownFromScreenReader(event);\n const isSyntheticEvent = this._lastTouchStartEvent &&\n Date.now() < this._lastTouchStartEvent + ignoreMouseEventsTimeout;\n if (!this._target.rippleDisabled && !isFakeMousedown && !isSyntheticEvent) {\n this._isPointerDown = true;\n this.fadeInRipple(event.clientX, event.clientY, this._target.rippleConfig);\n }\n }\n /** Function being called whenever the trigger is being pressed using touch. */\n _onTouchStart(event) {\n if (!this._target.rippleDisabled && !isFakeTouchstartFromScreenReader(event)) {\n // Some browsers fire mouse events after a `touchstart` event. Those synthetic mouse\n // events will launch a second ripple if we don't ignore mouse events for a specific\n // time after a touchstart event.\n this._lastTouchStartEvent = Date.now();\n this._isPointerDown = true;\n // Use `changedTouches` so we skip any touches where the user put\n // their finger down, but used another finger to tap the element again.\n const touches = event.changedTouches;\n for (let i = 0; i < touches.length; i++) {\n this.fadeInRipple(touches[i].clientX, touches[i].clientY, this._target.rippleConfig);\n }\n }\n }\n /** Function being called whenever the trigger is being released. */\n _onPointerUp() {\n if (!this._isPointerDown) {\n return;\n }\n this._isPointerDown = false;\n // Fade-out all ripples that are visible and not persistent.\n this._activeRipples.forEach(ripple => {\n // By default, only ripples that are completely visible will fade out on pointer release.\n // If the `terminateOnPointerUp` option is set, ripples that still fade in will also fade out.\n const isVisible = ripple.state === 1 /* VISIBLE */ ||\n (ripple.config.terminateOnPointerUp && ripple.state === 0 /* FADING_IN */);\n if (!ripple.config.persistent && isVisible) {\n ripple.fadeOut();\n }\n });\n }\n /** Runs a timeout outside of the Angular zone to avoid triggering the change detection. */\n _runTimeoutOutsideZone(fn, delay = 0) {\n this._ngZone.runOutsideAngular(() => setTimeout(fn, delay));\n }\n /** Registers event listeners for a given list of events. */\n _registerEvents(eventTypes) {\n this._ngZone.runOutsideAngular(() => {\n eventTypes.forEach(type => {\n this._triggerElement.addEventListener(type, this, passiveEventOptions);\n });\n });\n }\n /** Removes previously registered event listeners from the trigger element. */\n _removeTriggerEvents() {\n if (this._triggerElement) {\n pointerDownEvents.forEach(type => {\n this._triggerElement.removeEventListener(type, this, passiveEventOptions);\n });\n if (this._pointerUpEventsRegistered) {\n pointerUpEvents.forEach(type => {\n this._triggerElement.removeEventListener(type, this, passiveEventOptions);\n });\n }\n }\n }\n}\n/** Enforces a style recalculation of a DOM element by computing its styles. */\nfunction enforceStyleRecalculation(element) {\n // Enforce a style recalculation by calling `getComputedStyle` and accessing any property.\n // Calling `getPropertyValue` is important to let optimizers know that this is not a noop.\n // See: https://gist.github.com/paulirish/5d52fb081b3570c81e3a\n window.getComputedStyle(element).getPropertyValue('opacity');\n}\n/**\n * Returns the distance from the point (x, y) to the furthest corner of a rectangle.\n */\nfunction distanceToFurthestCorner(x, y, rect) {\n const distX = Math.max(Math.abs(x - rect.left), Math.abs(x - rect.right));\n const distY = Math.max(Math.abs(y - rect.top), Math.abs(y - rect.bottom));\n return Math.sqrt(distX * distX + distY * distY);\n}\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/** Injection token that can be used to specify the global ripple options. */\nconst MAT_RIPPLE_GLOBAL_OPTIONS = new InjectionToken('mat-ripple-global-options');\nclass MatRipple {\n constructor(_elementRef, ngZone, platform, globalOptions, _animationMode) {\n this._elementRef = _elementRef;\n this._animationMode = _animationMode;\n /**\n * If set, the radius in pixels of foreground ripples when fully expanded. If unset, the radius\n * will be the distance from the center of the ripple to the furthest corner of the host element's\n * bounding rectangle.\n */\n this.radius = 0;\n this._disabled = false;\n /** Whether ripple directive is initialized and the input bindings are set. */\n this._isInitialized = false;\n this._globalOptions = globalOptions || {};\n this._rippleRenderer = new RippleRenderer(this, ngZone, _elementRef, platform);\n }\n /**\n * Whether click events will not trigger the ripple. Ripples can be still launched manually\n * by using the `launch()` method.\n */\n get disabled() {\n return this._disabled;\n }\n set disabled(value) {\n if (value) {\n this.fadeOutAllNonPersistent();\n }\n this._disabled = value;\n this._setupTriggerEventsIfEnabled();\n }\n /**\n * The element that triggers the ripple when click events are received.\n * Defaults to the directive's host element.\n */\n get trigger() {\n return this._trigger || this._elementRef.nativeElement;\n }\n set trigger(trigger) {\n this._trigger = trigger;\n this._setupTriggerEventsIfEnabled();\n }\n ngOnInit() {\n this._isInitialized = true;\n this._setupTriggerEventsIfEnabled();\n }\n ngOnDestroy() {\n this._rippleRenderer._removeTriggerEvents();\n }\n /** Fades out all currently showing ripple elements. */\n fadeOutAll() {\n this._rippleRenderer.fadeOutAll();\n }\n /** Fades out all currently showing non-persistent ripple elements. */\n fadeOutAllNonPersistent() {\n this._rippleRenderer.fadeOutAllNonPersistent();\n }\n /**\n * Ripple configuration from the directive's input values.\n * @docs-private Implemented as part of RippleTarget\n */\n get rippleConfig() {\n return {\n centered: this.centered,\n radius: this.radius,\n color: this.color,\n animation: {\n ...this._globalOptions.animation,\n ...(this._animationMode === 'NoopAnimations' ? { enterDuration: 0, exitDuration: 0 } : {}),\n ...this.animation,\n },\n terminateOnPointerUp: this._globalOptions.terminateOnPointerUp,\n };\n }\n /**\n * Whether ripples on pointer-down are disabled or not.\n * @docs-private Implemented as part of RippleTarget\n */\n get rippleDisabled() {\n return this.disabled || !!this._globalOptions.disabled;\n }\n /** Sets up the trigger event listeners if ripples are enabled. */\n _setupTriggerEventsIfEnabled() {\n if (!this.disabled && this._isInitialized) {\n this._rippleRenderer.setupTriggerEvents(this.trigger);\n }\n }\n /** Launches a manual ripple at the specified coordinated or just by the ripple config. */\n launch(configOrX, y = 0, config) {\n if (typeof configOrX === 'number') {\n return this._rippleRenderer.fadeInRipple(configOrX, y, { ...this.rippleConfig, ...config });\n }\n else {\n return this._rippleRenderer.fadeInRipple(0, 0, { ...this.rippleConfig, ...configOrX });\n }\n }\n}\nMatRipple.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatRipple, deps: [{ token: i0.ElementRef }, { token: i0.NgZone }, { token: i1$1.Platform }, { token: MAT_RIPPLE_GLOBAL_OPTIONS, optional: true }, { token: ANIMATION_MODULE_TYPE, optional: true }], target: i0.ɵɵFactoryTarget.Directive });\nMatRipple.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: MatRipple, selector: \"[mat-ripple], [matRipple]\", inputs: { color: [\"matRippleColor\", \"color\"], unbounded: [\"matRippleUnbounded\", \"unbounded\"], centered: [\"matRippleCentered\", \"centered\"], radius: [\"matRippleRadius\", \"radius\"], animation: [\"matRippleAnimation\", \"animation\"], disabled: [\"matRippleDisabled\", \"disabled\"], trigger: [\"matRippleTrigger\", \"trigger\"] }, host: { properties: { \"class.mat-ripple-unbounded\": \"unbounded\" }, classAttribute: \"mat-ripple\" }, exportAs: [\"matRipple\"], ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatRipple, decorators: [{\n type: Directive,\n args: [{\n selector: '[mat-ripple], [matRipple]',\n exportAs: 'matRipple',\n host: {\n 'class': 'mat-ripple',\n '[class.mat-ripple-unbounded]': 'unbounded',\n },\n }]\n }], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: i0.NgZone }, { type: i1$1.Platform }, { type: undefined, decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [MAT_RIPPLE_GLOBAL_OPTIONS]\n }] }, { type: undefined, decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [ANIMATION_MODULE_TYPE]\n }] }]; }, propDecorators: { color: [{\n type: Input,\n args: ['matRippleColor']\n }], unbounded: [{\n type: Input,\n args: ['matRippleUnbounded']\n }], centered: [{\n type: Input,\n args: ['matRippleCentered']\n }], radius: [{\n type: Input,\n args: ['matRippleRadius']\n }], animation: [{\n type: Input,\n args: ['matRippleAnimation']\n }], disabled: [{\n type: Input,\n args: ['matRippleDisabled']\n }], trigger: [{\n type: Input,\n args: ['matRippleTrigger']\n }] } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass MatRippleModule {\n}\nMatRippleModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatRippleModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nMatRippleModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatRippleModule, declarations: [MatRipple], imports: [MatCommonModule, PlatformModule], exports: [MatRipple, MatCommonModule] });\nMatRippleModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatRippleModule, imports: [[MatCommonModule, PlatformModule], MatCommonModule] });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatRippleModule, decorators: [{\n type: NgModule,\n args: [{\n imports: [MatCommonModule, PlatformModule],\n exports: [MatRipple, MatCommonModule],\n declarations: [MatRipple],\n }]\n }] });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Component that shows a simplified checkbox without including any kind of \"real\" checkbox.\n * Meant to be used when the checkbox is purely decorative and a large number of them will be\n * included, such as for the options in a multi-select. Uses no SVGs or complex animations.\n * Note that theming is meant to be handled by the parent element, e.g.\n * `mat-primary .mat-pseudo-checkbox`.\n *\n * Note that this component will be completely invisible to screen-reader users. This is *not*\n * interchangeable with `` and should *not* be used if the user would directly\n * interact with the checkbox. The pseudo-checkbox should only be used as an implementation detail\n * of more complex components that appropriately handle selected / checked state.\n * @docs-private\n */\nclass MatPseudoCheckbox {\n constructor(_animationMode) {\n this._animationMode = _animationMode;\n /** Display state of the checkbox. */\n this.state = 'unchecked';\n /** Whether the checkbox is disabled. */\n this.disabled = false;\n }\n}\nMatPseudoCheckbox.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatPseudoCheckbox, deps: [{ token: ANIMATION_MODULE_TYPE, optional: true }], target: i0.ɵɵFactoryTarget.Component });\nMatPseudoCheckbox.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: MatPseudoCheckbox, selector: \"mat-pseudo-checkbox\", inputs: { state: \"state\", disabled: \"disabled\" }, host: { properties: { \"class.mat-pseudo-checkbox-indeterminate\": \"state === \\\"indeterminate\\\"\", \"class.mat-pseudo-checkbox-checked\": \"state === \\\"checked\\\"\", \"class.mat-pseudo-checkbox-disabled\": \"disabled\", \"class._mat-animation-noopable\": \"_animationMode === \\\"NoopAnimations\\\"\" }, classAttribute: \"mat-pseudo-checkbox\" }, ngImport: i0, template: '', isInline: true, styles: [\".mat-pseudo-checkbox{width:16px;height:16px;border:2px solid;border-radius:2px;cursor:pointer;display:inline-block;vertical-align:middle;box-sizing:border-box;position:relative;flex-shrink:0;transition:border-color 90ms cubic-bezier(0, 0, 0.2, 0.1),background-color 90ms cubic-bezier(0, 0, 0.2, 0.1)}.mat-pseudo-checkbox::after{position:absolute;opacity:0;content:\\\"\\\";border-bottom:2px solid currentColor;transition:opacity 90ms cubic-bezier(0, 0, 0.2, 0.1)}.mat-pseudo-checkbox.mat-pseudo-checkbox-checked,.mat-pseudo-checkbox.mat-pseudo-checkbox-indeterminate{border-color:transparent}._mat-animation-noopable.mat-pseudo-checkbox{transition:none;animation:none}._mat-animation-noopable.mat-pseudo-checkbox::after{transition:none}.mat-pseudo-checkbox-disabled{cursor:default}.mat-pseudo-checkbox-indeterminate::after{top:5px;left:1px;width:10px;opacity:1;border-radius:2px}.mat-pseudo-checkbox-checked::after{top:2.4px;left:1px;width:8px;height:3px;border-left:2px solid currentColor;transform:rotate(-45deg);opacity:1;box-sizing:content-box}\\n\"], changeDetection: i0.ChangeDetectionStrategy.OnPush, encapsulation: i0.ViewEncapsulation.None });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatPseudoCheckbox, decorators: [{\n type: Component,\n args: [{ encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush, selector: 'mat-pseudo-checkbox', template: '', host: {\n 'class': 'mat-pseudo-checkbox',\n '[class.mat-pseudo-checkbox-indeterminate]': 'state === \"indeterminate\"',\n '[class.mat-pseudo-checkbox-checked]': 'state === \"checked\"',\n '[class.mat-pseudo-checkbox-disabled]': 'disabled',\n '[class._mat-animation-noopable]': '_animationMode === \"NoopAnimations\"',\n }, styles: [\".mat-pseudo-checkbox{width:16px;height:16px;border:2px solid;border-radius:2px;cursor:pointer;display:inline-block;vertical-align:middle;box-sizing:border-box;position:relative;flex-shrink:0;transition:border-color 90ms cubic-bezier(0, 0, 0.2, 0.1),background-color 90ms cubic-bezier(0, 0, 0.2, 0.1)}.mat-pseudo-checkbox::after{position:absolute;opacity:0;content:\\\"\\\";border-bottom:2px solid currentColor;transition:opacity 90ms cubic-bezier(0, 0, 0.2, 0.1)}.mat-pseudo-checkbox.mat-pseudo-checkbox-checked,.mat-pseudo-checkbox.mat-pseudo-checkbox-indeterminate{border-color:transparent}._mat-animation-noopable.mat-pseudo-checkbox{transition:none;animation:none}._mat-animation-noopable.mat-pseudo-checkbox::after{transition:none}.mat-pseudo-checkbox-disabled{cursor:default}.mat-pseudo-checkbox-indeterminate::after{top:5px;left:1px;width:10px;opacity:1;border-radius:2px}.mat-pseudo-checkbox-checked::after{top:2.4px;left:1px;width:8px;height:3px;border-left:2px solid currentColor;transform:rotate(-45deg);opacity:1;box-sizing:content-box}\\n\"] }]\n }], ctorParameters: function () { return [{ type: undefined, decorators: [{\n type: Optional\n }, {\n type: Inject,\n args: [ANIMATION_MODULE_TYPE]\n }] }]; }, propDecorators: { state: [{\n type: Input\n }], disabled: [{\n type: Input\n }] } });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nclass MatPseudoCheckboxModule {\n}\nMatPseudoCheckboxModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatPseudoCheckboxModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });\nMatPseudoCheckboxModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatPseudoCheckboxModule, declarations: [MatPseudoCheckbox], imports: [MatCommonModule], exports: [MatPseudoCheckbox] });\nMatPseudoCheckboxModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatPseudoCheckboxModule, imports: [[MatCommonModule]] });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatPseudoCheckboxModule, decorators: [{\n type: NgModule,\n args: [{\n imports: [MatCommonModule],\n exports: [MatPseudoCheckbox],\n declarations: [MatPseudoCheckbox],\n }]\n }] });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Injection token used to provide the parent component to options.\n */\nconst MAT_OPTION_PARENT_COMPONENT = new InjectionToken('MAT_OPTION_PARENT_COMPONENT');\n\n// Notes on the accessibility pattern used for `mat-optgroup`.\n// The option group has two different \"modes\": regular and inert. The regular mode uses the\n// recommended a11y pattern which has `role=\"group\"` on the group element with `aria-labelledby`\n// pointing to the label. This works for `mat-select`, but it seems to hit a bug for autocomplete\n// under VoiceOver where the group doesn't get read out at all. The bug appears to be that if\n// there's __any__ a11y-related attribute on the group (e.g. `role` or `aria-labelledby`),\n// VoiceOver on Safari won't read it out.\n// We've introduced the `inert` mode as a workaround. Under this mode, all a11y attributes are\n// removed from the group, and we get the screen reader to read out the group label by mirroring it\n// inside an invisible element in the option. This is sub-optimal, because the screen reader will\n// repeat the group label on each navigation, whereas the default pattern only reads the group when\n// the user enters a new group. The following alternate approaches were considered:\n// 1. Reading out the group label using the `LiveAnnouncer` solves the problem, but we can't control\n// when the text will be read out so sometimes it comes in too late or never if the user\n// navigates quickly.\n// 2. `{{ label }} \\n\\n\", styles: [\".mat-optgroup-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block;line-height:48px;height:48px;padding:0 16px;text-align:left;text-decoration:none;max-width:100%;-webkit-user-select:none;-moz-user-select:none;user-select:none;cursor:default}.mat-optgroup-label[disabled]{cursor:default}[dir=rtl] .mat-optgroup-label{text-align:right}.mat-optgroup-label .mat-icon{margin-right:16px;vertical-align:middle}.mat-optgroup-label .mat-icon svg{vertical-align:top}[dir=rtl] .mat-optgroup-label .mat-icon{margin-left:16px;margin-right:0}\\n\"], changeDetection: i0.ChangeDetectionStrategy.OnPush, encapsulation: i0.ViewEncapsulation.None });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatOptgroup, decorators: [{\n type: Component,\n args: [{ selector: 'mat-optgroup', exportAs: 'matOptgroup', encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush, inputs: ['disabled'], host: {\n 'class': 'mat-optgroup',\n '[attr.role]': '_inert ? null : \"group\"',\n '[attr.aria-disabled]': '_inert ? null : disabled.toString()',\n '[attr.aria-labelledby]': '_inert ? null : _labelId',\n '[class.mat-optgroup-disabled]': 'disabled',\n }, providers: [{ provide: MAT_OPTGROUP, useExisting: MatOptgroup }], template: \"{{ label }} \\n\\n\", styles: [\".mat-optgroup-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block;line-height:48px;height:48px;padding:0 16px;text-align:left;text-decoration:none;max-width:100%;-webkit-user-select:none;-moz-user-select:none;user-select:none;cursor:default}.mat-optgroup-label[disabled]{cursor:default}[dir=rtl] .mat-optgroup-label{text-align:right}.mat-optgroup-label .mat-icon{margin-right:16px;vertical-align:middle}.mat-optgroup-label .mat-icon svg{vertical-align:top}[dir=rtl] .mat-optgroup-label .mat-icon{margin-left:16px;margin-right:0}\\n\"] }]\n }] });\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n/**\n * Option IDs need to be unique across components, so this counter exists outside of\n * the component definition.\n */\nlet _uniqueIdCounter = 0;\n/** Event object emitted by MatOption when selected or deselected. */\nclass MatOptionSelectionChange {\n constructor(\n /** Reference to the option that emitted the event. */\n source, \n /** Whether the change in the option's value was a result of a user action. */\n isUserInput = false) {\n this.source = source;\n this.isUserInput = isUserInput;\n }\n}\nclass _MatOptionBase {\n constructor(_element, _changeDetectorRef, _parent, group) {\n this._element = _element;\n this._changeDetectorRef = _changeDetectorRef;\n this._parent = _parent;\n this.group = group;\n this._selected = false;\n this._active = false;\n this._disabled = false;\n this._mostRecentViewValue = '';\n /** The unique ID of the option. */\n this.id = `mat-option-${_uniqueIdCounter++}`;\n /** Event emitted when the option is selected or deselected. */\n // tslint:disable-next-line:no-output-on-prefix\n this.onSelectionChange = new EventEmitter();\n /** Emits when the state of the option changes and any parents have to be notified. */\n this._stateChanges = new Subject();\n }\n /** Whether the wrapping component is in multiple selection mode. */\n get multiple() {\n return this._parent && this._parent.multiple;\n }\n /** Whether or not the option is currently selected. */\n get selected() {\n return this._selected;\n }\n /** Whether the option is disabled. */\n get disabled() {\n return (this.group && this.group.disabled) || this._disabled;\n }\n set disabled(value) {\n this._disabled = coerceBooleanProperty(value);\n }\n /** Whether ripples for the option are disabled. */\n get disableRipple() {\n return this._parent && this._parent.disableRipple;\n }\n /**\n * Whether or not the option is currently active and ready to be selected.\n * An active option displays styles as if it is focused, but the\n * focus is actually retained somewhere else. This comes in handy\n * for components like autocomplete where focus must remain on the input.\n */\n get active() {\n return this._active;\n }\n /**\n * The displayed value of the option. It is necessary to show the selected option in the\n * select's trigger.\n */\n get viewValue() {\n // TODO(kara): Add input property alternative for node envs.\n return (this._getHostElement().textContent || '').trim();\n }\n /** Selects the option. */\n select() {\n if (!this._selected) {\n this._selected = true;\n this._changeDetectorRef.markForCheck();\n this._emitSelectionChangeEvent();\n }\n }\n /** Deselects the option. */\n deselect() {\n if (this._selected) {\n this._selected = false;\n this._changeDetectorRef.markForCheck();\n this._emitSelectionChangeEvent();\n }\n }\n /** Sets focus onto this option. */\n focus(_origin, options) {\n // Note that we aren't using `_origin`, but we need to keep it because some internal consumers\n // use `MatOption` in a `FocusKeyManager` and we need it to match `FocusableOption`.\n const element = this._getHostElement();\n if (typeof element.focus === 'function') {\n element.focus(options);\n }\n }\n /**\n * This method sets display styles on the option to make it appear\n * active. This is used by the ActiveDescendantKeyManager so key\n * events will display the proper options as active on arrow key events.\n */\n setActiveStyles() {\n if (!this._active) {\n this._active = true;\n this._changeDetectorRef.markForCheck();\n }\n }\n /**\n * This method removes display styles on the option that made it appear\n * active. This is used by the ActiveDescendantKeyManager so key\n * events will display the proper options as active on arrow key events.\n */\n setInactiveStyles() {\n if (this._active) {\n this._active = false;\n this._changeDetectorRef.markForCheck();\n }\n }\n /** Gets the label to be used when determining whether the option should be focused. */\n getLabel() {\n return this.viewValue;\n }\n /** Ensures the option is selected when activated from the keyboard. */\n _handleKeydown(event) {\n if ((event.keyCode === ENTER || event.keyCode === SPACE) && !hasModifierKey(event)) {\n this._selectViaInteraction();\n // Prevent the page from scrolling down and form submits.\n event.preventDefault();\n }\n }\n /**\n * `Selects the option while indicating the selection came from the user. Used to\n * determine if the select's view -> model callback should be invoked.`\n */\n _selectViaInteraction() {\n if (!this.disabled) {\n this._selected = this.multiple ? !this._selected : true;\n this._changeDetectorRef.markForCheck();\n this._emitSelectionChangeEvent(true);\n }\n }\n /**\n * Gets the `aria-selected` value for the option. We explicitly omit the `aria-selected`\n * attribute from single-selection, unselected options. Including the `aria-selected=\"false\"`\n * attributes adds a significant amount of noise to screen-reader users without providing useful\n * information.\n */\n _getAriaSelected() {\n return this.selected || (this.multiple ? false : null);\n }\n /** Returns the correct tabindex for the option depending on disabled state. */\n _getTabIndex() {\n return this.disabled ? '-1' : '0';\n }\n /** Gets the host DOM element. */\n _getHostElement() {\n return this._element.nativeElement;\n }\n ngAfterViewChecked() {\n // Since parent components could be using the option's label to display the selected values\n // (e.g. `mat-select`) and they don't have a way of knowing if the option's label has changed\n // we have to check for changes in the DOM ourselves and dispatch an event. These checks are\n // relatively cheap, however we still limit them only to selected options in order to avoid\n // hitting the DOM too often.\n if (this._selected) {\n const viewValue = this.viewValue;\n if (viewValue !== this._mostRecentViewValue) {\n this._mostRecentViewValue = viewValue;\n this._stateChanges.next();\n }\n }\n }\n ngOnDestroy() {\n this._stateChanges.complete();\n }\n /** Emits the selection change event. */\n _emitSelectionChangeEvent(isUserInput = false) {\n this.onSelectionChange.emit(new MatOptionSelectionChange(this, isUserInput));\n }\n}\n_MatOptionBase.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: _MatOptionBase, deps: \"invalid\", target: i0.ɵɵFactoryTarget.Directive });\n_MatOptionBase.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: _MatOptionBase, inputs: { value: \"value\", id: \"id\", disabled: \"disabled\" }, outputs: { onSelectionChange: \"onSelectionChange\" }, ngImport: i0 });\ni0.ɵɵngDeclareClassMetadata({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: _MatOptionBase, decorators: [{\n type: Directive\n }], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: i0.ChangeDetectorRef }, { type: undefined }, { type: _MatOptgroupBase }]; }, propDecorators: { value: [{\n type: Input\n }], id: [{\n type: Input\n }], disabled: [{\n type: Input\n }], onSelectionChange: [{\n type: Output\n }] } });\n/**\n * Single option inside of a `` element.\n */\nclass MatOption extends _MatOptionBase {\n constructor(element, changeDetectorRef, parent, group) {\n super(element, changeDetectorRef, parent, group);\n }\n}\nMatOption.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", ngImport: i0, type: MatOption, deps: [{ token: i0.ElementRef }, { token: i0.ChangeDetectorRef }, { token: MAT_OPTION_PARENT_COMPONENT, optional: true }, { token: MAT_OPTGROUP, optional: true }], target: i0.ɵɵFactoryTarget.Component });\nMatOption.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: \"12.0.0\", version: \"13.0.0-rc.3\", type: MatOption, selector: \"mat-option\", host: { attributes: { \"role\": \"option\" }, listeners: { \"click\": \"_selectViaInteraction()\", \"keydown\": \"_handleKeydown($event)\" }, properties: { \"attr.tabindex\": \"_getTabIndex()\", \"class.mat-selected\": \"selected\", \"class.mat-option-multiple\": \"multiple\", \"class.mat-active\": \"active\", \"id\": \"id\", \"attr.aria-selected\": \"_getAriaSelected()\", \"attr.aria-disabled\": \"disabled.toString()\", \"class.mat-option-disabled\": \"disabled\" }, classAttribute: \"mat-option mat-focus-indicator\" }, exportAs: [\"matOption\"], usesInheritance: true, ngImport: i0, template: \"\\n\\n\\n\\n\\n({{ group.label }})\\n\\n