`\n // and attach a portal programmatically in the parent component. When Angular does the first CD\n // round, it will fire the setter with empty string, causing the user's content to be cleared.\n if (this.hasAttached() && !portal && !this._isInitialized) {\n return;\n }\n if (this.hasAttached()) {\n super.detach();\n }\n if (portal) {\n super.attach(portal);\n }\n this._attachedPortal = portal || null;\n }\n /** Emits when a portal is attached to the outlet. */\n attached = new EventEmitter();\n /** Component or view reference that is attached to the portal. */\n get attachedRef() {\n return this._attachedRef;\n }\n ngOnInit() {\n this._isInitialized = true;\n }\n ngOnDestroy() {\n super.dispose();\n this._attachedRef = this._attachedPortal = null;\n }\n /**\n * Attach the given ComponentPortal to this PortalOutlet.\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 ref = viewContainerRef.createComponent(portal.component, {\n index: viewContainerRef.length,\n injector: portal.injector || viewContainerRef.injector,\n projectableNodes: portal.projectableNodes || undefined,\n ngModuleRef: this._moduleRef || undefined\n });\n // If we're using a view container that's different from the injected one (e.g. when the portal\n // specifies its own) we need to move the component into the outlet, otherwise it'll be rendered\n // inside of the alternate view container.\n if (viewContainerRef !== this._viewContainerRef) {\n this._getRootNode().appendChild(ref.hostView.rootNodes[0]);\n }\n super.setDisposeFn(() => ref.destroy());\n this._attachedPortal = portal;\n this._attachedRef = ref;\n this.attached.emit(ref);\n return ref;\n }\n /**\n * Attach the given TemplatePortal to this PortalHost as an embedded View.\n * @param portal Portal to be attached.\n * @returns Reference to the created embedded view.\n */\n attachTemplatePortal(portal) {\n portal.setAttachedHost(this);\n const viewRef = this._viewContainerRef.createEmbeddedView(portal.templateRef, portal.context, {\n injector: portal.injector\n });\n super.setDisposeFn(() => this._viewContainerRef.clear());\n this._attachedPortal = portal;\n this._attachedRef = viewRef;\n this.attached.emit(viewRef);\n return viewRef;\n }\n /**\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 attachDomPortal = portal => {\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 /** Gets the root node of the portal outlet. */\n _getRootNode() {\n const nativeElement = this._viewContainerRef.element.nativeElement;\n // The directive could be set on a template which will result in a comment\n // node being the root. Use the comment's parent node if that is the case.\n return nativeElement.nodeType === nativeElement.ELEMENT_NODE ? nativeElement : nativeElement.parentNode;\n }\n static ɵfac = function CdkPortalOutlet_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || CdkPortalOutlet)();\n };\n static ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkPortalOutlet,\n selectors: [[\"\", \"cdkPortalOutlet\", \"\"]],\n inputs: {\n portal: [0, \"cdkPortalOutlet\", \"portal\"]\n },\n outputs: {\n attached: \"attached\"\n },\n exportAs: [\"cdkPortalOutlet\"],\n features: [i0.ɵɵInheritDefinitionFeature]\n });\n }\n return CdkPortalOutlet;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n/**\n * @deprecated Use `CdkPortalOutlet` instead.\n * @breaking-change 9.0.0\n */\nlet PortalHostDirective = /*#__PURE__*/(() => {\n class PortalHostDirective extends CdkPortalOutlet {\n static ɵfac = /* @__PURE__ */(() => {\n let ɵPortalHostDirective_BaseFactory;\n return function PortalHostDirective_Factory(__ngFactoryType__) {\n return (ɵPortalHostDirective_BaseFactory || (ɵPortalHostDirective_BaseFactory = i0.ɵɵgetInheritedFactory(PortalHostDirective)))(__ngFactoryType__ || PortalHostDirective);\n };\n })();\n static ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: PortalHostDirective,\n selectors: [[\"\", \"cdkPortalHost\", \"\"], [\"\", \"portalHost\", \"\"]],\n inputs: {\n portal: [0, \"cdkPortalHost\", \"portal\"]\n },\n exportAs: [\"cdkPortalHost\"],\n features: [i0.ɵɵProvidersFeature([{\n provide: CdkPortalOutlet,\n useExisting: PortalHostDirective\n }]), i0.ɵɵInheritDefinitionFeature]\n });\n }\n return PortalHostDirective;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\nlet PortalModule = /*#__PURE__*/(() => {\n class PortalModule {\n static ɵfac = function PortalModule_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || PortalModule)();\n };\n static ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: PortalModule\n });\n static ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({});\n }\n return PortalModule;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n\n/**\n * Custom injector to be used when providing custom\n * injection tokens to components inside a portal.\n * @docs-private\n * @deprecated Use `Injector.create` instead.\n * @breaking-change 11.0.0\n */\nclass PortalInjector {\n _parentInjector;\n _customTokens;\n constructor(_parentInjector, _customTokens) {\n this._parentInjector = _parentInjector;\n this._customTokens = _customTokens;\n }\n get(token, notFoundValue) {\n const value = this._customTokens.get(token);\n if (typeof value !== 'undefined') {\n return value;\n }\n return this._parentInjector.get(token, notFoundValue);\n }\n}\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { BasePortalHost, BasePortalOutlet, CdkPortal, CdkPortalOutlet, ComponentPortal, DomPortal, DomPortalHost, DomPortalOutlet, Portal, PortalHostDirective, PortalInjector, PortalModule, TemplatePortal, TemplatePortalDirective };\n","import { ScrollDispatcher, ViewportRuler, ScrollingModule } from '@angular/cdk/scrolling';\nexport { CdkScrollable, ScrollDispatcher, ViewportRuler } from '@angular/cdk/scrolling';\nimport { DOCUMENT, Location } from '@angular/common';\nimport * as i0 from '@angular/core';\nimport { inject, NgZone, Injectable, RendererFactory2, Component, ChangeDetectionStrategy, ViewEncapsulation, untracked, afterRender, afterNextRender, ElementRef, Injector, ANIMATION_MODULE_TYPE, EnvironmentInjector, ApplicationRef, InjectionToken, Directive, EventEmitter, TemplateRef, ViewContainerRef, booleanAttribute, Input, Output, NgModule } from '@angular/core';\nimport { coerceCssPixelValue, coerceArray } from '@angular/cdk/coercion';\nimport { supportsScrollBehavior, Platform, _getEventTarget, _isTestEnvironment } from '@angular/cdk/platform';\nimport { filter, takeUntil, takeWhile } from 'rxjs/operators';\nimport { Directionality, BidiModule } from '@angular/cdk/bidi';\nimport { DomPortalOutlet, TemplatePortal, PortalModule } from '@angular/cdk/portal';\nimport { _IdGenerator } from '@angular/cdk/a11y';\nimport { _CdkPrivateStyleLoader } from '@angular/cdk/private';\nimport { Subject, Subscription, merge } from 'rxjs';\nimport { ESCAPE, hasModifierKey } from '@angular/cdk/keycodes';\nconst scrollBehaviorSupported = /*#__PURE__*/supportsScrollBehavior();\n/**\n * Strategy that will prevent the user from scrolling while the overlay is visible.\n */\nclass BlockScrollStrategy {\n _viewportRuler;\n _previousHTMLStyles = {\n top: '',\n left: ''\n };\n _previousScrollPosition;\n _isEnabled = false;\n _document;\n constructor(_viewportRuler, document) {\n this._viewportRuler = _viewportRuler;\n this._document = document;\n }\n /** Attaches this scroll strategy to an overlay. */\n attach() {}\n /** Blocks page-level scroll while the attached overlay is open. */\n enable() {\n if (this._canBeEnabled()) {\n const root = this._document.documentElement;\n this._previousScrollPosition = this._viewportRuler.getViewportScrollPosition();\n // Cache the previous inline styles in case the user had set them.\n this._previousHTMLStyles.left = root.style.left || '';\n this._previousHTMLStyles.top = root.style.top || '';\n // Note: we're using the `html` node, instead of the `body`, because the `body` may\n // have the user agent margin, whereas the `html` is guaranteed not to have one.\n root.style.left = coerceCssPixelValue(-this._previousScrollPosition.left);\n root.style.top = coerceCssPixelValue(-this._previousScrollPosition.top);\n root.classList.add('cdk-global-scrollblock');\n this._isEnabled = true;\n }\n }\n /** Unblocks page-level scroll while the attached overlay is open. */\n disable() {\n if (this._isEnabled) {\n const html = this._document.documentElement;\n const body = this._document.body;\n const htmlStyle = html.style;\n const bodyStyle = body.style;\n const previousHtmlScrollBehavior = htmlStyle.scrollBehavior || '';\n const previousBodyScrollBehavior = bodyStyle.scrollBehavior || '';\n this._isEnabled = false;\n htmlStyle.left = this._previousHTMLStyles.left;\n htmlStyle.top = this._previousHTMLStyles.top;\n html.classList.remove('cdk-global-scrollblock');\n // Disable user-defined smooth scrolling temporarily while we restore the scroll position.\n // See https://developer.mozilla.org/en-US/docs/Web/CSS/scroll-behavior\n // Note that we don't mutate the property if the browser doesn't support `scroll-behavior`,\n // because it can throw off feature detections in `supportsScrollBehavior` which\n // checks for `'scrollBehavior' in documentElement.style`.\n if (scrollBehaviorSupported) {\n htmlStyle.scrollBehavior = bodyStyle.scrollBehavior = 'auto';\n }\n window.scroll(this._previousScrollPosition.left, this._previousScrollPosition.top);\n if (scrollBehaviorSupported) {\n htmlStyle.scrollBehavior = previousHtmlScrollBehavior;\n bodyStyle.scrollBehavior = previousBodyScrollBehavior;\n }\n }\n }\n _canBeEnabled() {\n // Since the scroll strategies can't be singletons, we have to use a global CSS class\n // (`cdk-global-scrollblock`) to make sure that we don't try to disable global\n // scrolling multiple times.\n const html = this._document.documentElement;\n if (html.classList.contains('cdk-global-scrollblock') || this._isEnabled) {\n return false;\n }\n const body = this._document.body;\n const viewport = this._viewportRuler.getViewportSize();\n return body.scrollHeight > viewport.height || body.scrollWidth > viewport.width;\n }\n}\n\n/**\n * Returns an error to be thrown when attempting to attach an already-attached scroll strategy.\n */\nfunction getMatScrollStrategyAlreadyAttachedError() {\n return Error(`Scroll strategy has already been attached.`);\n}\n\n/**\n * Strategy that will close the overlay as soon as the user starts scrolling.\n */\nclass CloseScrollStrategy {\n _scrollDispatcher;\n _ngZone;\n _viewportRuler;\n _config;\n _scrollSubscription = null;\n _overlayRef;\n _initialScrollPosition;\n constructor(_scrollDispatcher, _ngZone, _viewportRuler, _config) {\n this._scrollDispatcher = _scrollDispatcher;\n this._ngZone = _ngZone;\n this._viewportRuler = _viewportRuler;\n this._config = _config;\n }\n /** Attaches this scroll strategy to an overlay. */\n attach(overlayRef) {\n if (this._overlayRef && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw getMatScrollStrategyAlreadyAttachedError();\n }\n this._overlayRef = overlayRef;\n }\n /** Enables the closing of the attached overlay on scroll. */\n enable() {\n if (this._scrollSubscription) {\n return;\n }\n const stream = this._scrollDispatcher.scrolled(0).pipe(filter(scrollable => {\n return !scrollable || !this._overlayRef.overlayElement.contains(scrollable.getElementRef().nativeElement);\n }));\n if (this._config && this._config.threshold && this._config.threshold > 1) {\n this._initialScrollPosition = this._viewportRuler.getViewportScrollPosition().top;\n this._scrollSubscription = stream.subscribe(() => {\n const scrollPosition = this._viewportRuler.getViewportScrollPosition().top;\n if (Math.abs(scrollPosition - this._initialScrollPosition) > this._config.threshold) {\n this._detach();\n } else {\n this._overlayRef.updatePosition();\n }\n });\n } else {\n this._scrollSubscription = stream.subscribe(this._detach);\n }\n }\n /** Disables the closing the attached overlay on scroll. */\n disable() {\n if (this._scrollSubscription) {\n this._scrollSubscription.unsubscribe();\n this._scrollSubscription = null;\n }\n }\n detach() {\n this.disable();\n this._overlayRef = null;\n }\n /** Detaches the overlay ref and disables the scroll strategy. */\n _detach = () => {\n this.disable();\n if (this._overlayRef.hasAttached()) {\n this._ngZone.run(() => this._overlayRef.detach());\n }\n };\n}\n\n/** Scroll strategy that doesn't do anything. */\nclass NoopScrollStrategy {\n /** Does nothing, as this scroll strategy is a no-op. */\n enable() {}\n /** Does nothing, as this scroll strategy is a no-op. */\n disable() {}\n /** Does nothing, as this scroll strategy is a no-op. */\n attach() {}\n}\n\n/**\n * Gets whether an element is scrolled outside of view by any of its parent scrolling containers.\n * @param element Dimensions of the element (from getBoundingClientRect)\n * @param scrollContainers Dimensions of element's scrolling containers (from getBoundingClientRect)\n * @returns Whether the element is scrolled out of view\n * @docs-private\n */\nfunction isElementScrolledOutsideView(element, scrollContainers) {\n return scrollContainers.some(containerBounds => {\n const outsideAbove = element.bottom < containerBounds.top;\n const outsideBelow = element.top > containerBounds.bottom;\n const outsideLeft = element.right < containerBounds.left;\n const outsideRight = element.left > containerBounds.right;\n return outsideAbove || outsideBelow || outsideLeft || outsideRight;\n });\n}\n/**\n * Gets whether an element is clipped by any of its scrolling containers.\n * @param element Dimensions of the element (from getBoundingClientRect)\n * @param scrollContainers Dimensions of element's scrolling containers (from getBoundingClientRect)\n * @returns Whether the element is clipped\n * @docs-private\n */\nfunction isElementClippedByScrolling(element, scrollContainers) {\n return scrollContainers.some(scrollContainerRect => {\n const clippedAbove = element.top < scrollContainerRect.top;\n const clippedBelow = element.bottom > scrollContainerRect.bottom;\n const clippedLeft = element.left < scrollContainerRect.left;\n const clippedRight = element.right > scrollContainerRect.right;\n return clippedAbove || clippedBelow || clippedLeft || clippedRight;\n });\n}\n\n/**\n * Strategy that will update the element position as the user is scrolling.\n */\nclass RepositionScrollStrategy {\n _scrollDispatcher;\n _viewportRuler;\n _ngZone;\n _config;\n _scrollSubscription = null;\n _overlayRef;\n constructor(_scrollDispatcher, _viewportRuler, _ngZone, _config) {\n this._scrollDispatcher = _scrollDispatcher;\n this._viewportRuler = _viewportRuler;\n this._ngZone = _ngZone;\n this._config = _config;\n }\n /** Attaches this scroll strategy to an overlay. */\n attach(overlayRef) {\n if (this._overlayRef && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw getMatScrollStrategyAlreadyAttachedError();\n }\n this._overlayRef = overlayRef;\n }\n /** Enables repositioning of the attached overlay on scroll. */\n enable() {\n if (!this._scrollSubscription) {\n const throttle = this._config ? this._config.scrollThrottle : 0;\n this._scrollSubscription = this._scrollDispatcher.scrolled(throttle).subscribe(() => {\n this._overlayRef.updatePosition();\n // TODO(crisbeto): make `close` on by default once all components can handle it.\n if (this._config && this._config.autoClose) {\n const overlayRect = this._overlayRef.overlayElement.getBoundingClientRect();\n const {\n width,\n height\n } = this._viewportRuler.getViewportSize();\n // TODO(crisbeto): include all ancestor scroll containers here once\n // we have a way of exposing the trigger element to the scroll strategy.\n const parentRects = [{\n width,\n height,\n bottom: height,\n right: width,\n top: 0,\n left: 0\n }];\n if (isElementScrolledOutsideView(overlayRect, parentRects)) {\n this.disable();\n this._ngZone.run(() => this._overlayRef.detach());\n }\n }\n });\n }\n }\n /** Disables repositioning of the attached overlay on scroll. */\n disable() {\n if (this._scrollSubscription) {\n this._scrollSubscription.unsubscribe();\n this._scrollSubscription = null;\n }\n }\n detach() {\n this.disable();\n this._overlayRef = null;\n }\n}\n\n/**\n * Options for how an overlay will handle scrolling.\n *\n * Users can provide a custom value for `ScrollStrategyOptions` to replace the default\n * behaviors. This class primarily acts as a factory for ScrollStrategy instances.\n */\nlet ScrollStrategyOptions = /*#__PURE__*/(() => {\n class ScrollStrategyOptions {\n _scrollDispatcher = inject(ScrollDispatcher);\n _viewportRuler = inject(ViewportRuler);\n _ngZone = inject(NgZone);\n _document = inject(DOCUMENT);\n constructor() {}\n /** Do nothing on scroll. */\n 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 close = config => new CloseScrollStrategy(this._scrollDispatcher, this._ngZone, this._viewportRuler, config);\n /** Block scrolling. */\n 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 reposition = config => new RepositionScrollStrategy(this._scrollDispatcher, this._viewportRuler, this._ngZone, config);\n static ɵfac = function ScrollStrategyOptions_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || ScrollStrategyOptions)();\n };\n static ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: ScrollStrategyOptions,\n factory: ScrollStrategyOptions.ɵfac,\n providedIn: 'root'\n });\n }\n return ScrollStrategyOptions;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n\n/** Initial configuration used when creating an overlay. */\nclass OverlayConfig {\n /** Strategy with which to position the overlay. */\n positionStrategy;\n /** Strategy to be used when handling scroll events while the overlay is open. */\n scrollStrategy = /*#__PURE__*/new NoopScrollStrategy();\n /** Custom class to add to the overlay pane. */\n panelClass = '';\n /** Whether the overlay has a backdrop. */\n hasBackdrop = false;\n /** Custom class to add to the backdrop */\n backdropClass = 'cdk-overlay-dark-backdrop';\n /** The width of the overlay panel. If a number is provided, pixel units are assumed. */\n width;\n /** The height of the overlay panel. If a number is provided, pixel units are assumed. */\n height;\n /** The min-width of the overlay panel. If a number is provided, pixel units are assumed. */\n minWidth;\n /** The min-height of the overlay panel. If a number is provided, pixel units are assumed. */\n minHeight;\n /** The max-width of the overlay panel. If a number is provided, pixel units are assumed. */\n maxWidth;\n /** The max-height of the overlay panel. If a number is provided, pixel units are assumed. */\n maxHeight;\n /**\n * Direction of the text in the overlay panel. If a `Directionality` instance\n * is passed in, the overlay will handle changes to its value automatically.\n */\n direction;\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 disposeOnNavigation = false;\n constructor(config) {\n if (config) {\n // Use `Iterable` instead of `Array` because TypeScript, as of 3.6.3,\n // loses the array generic type in the `for of`. But we *also* have to use `Array` because\n // typescript won't iterate over an `Iterable` unless you compile with `--downlevelIteration`\n const configKeys = Object.keys(config);\n for (const key of configKeys) {\n if (config[key] !== undefined) {\n // TypeScript, as of version 3.5, sees the left-hand-side of this expression\n // as \"I don't know *which* key this is, so the only valid value is the intersection\n // of all the possible values.\" In this case, that happens to be `undefined`. TypeScript\n // is not smart enough to see that the right-hand-side is actually an access of the same\n // exact type with the same exact key, meaning that the value type must be identical.\n // So we use `any` to work around this.\n this[key] = config[key];\n }\n }\n }\n }\n}\n\n/** The points of the origin element and the overlay element to connect. */\nclass ConnectionPositionPair {\n offsetX;\n offsetY;\n panelClass;\n /** X-axis attachment point for connected overlay origin. Can be 'start', 'end', or 'center'. */\n originX;\n /** Y-axis attachment point for connected overlay origin. Can be 'top', 'bottom', or 'center'. */\n originY;\n /** X-axis attachment point for connected overlay. Can be 'start', 'end', or 'center'. */\n overlayX;\n /** Y-axis attachment point for connected overlay. Can be 'top', 'bottom', or 'center'. */\n overlayY;\n constructor(origin, overlay, /** Offset along the X axis. */\n offsetX, /** Offset along the Y axis. */\n offsetY, /** Class(es) to be applied to the panel while this position is active. */\n panelClass) {\n this.offsetX = offsetX;\n this.offsetY = offsetY;\n this.panelClass = panelClass;\n this.originX = origin.originX;\n this.originY = origin.originY;\n this.overlayX = overlay.overlayX;\n this.overlayY = overlay.overlayY;\n }\n}\n/**\n * Set of properties regarding the position of the origin and overlay relative to the viewport\n * with respect to the containing Scrollable elements.\n *\n * The overlay and origin are clipped if any part of their bounding client rectangle exceeds the\n * bounds of any one of the strategy's Scrollable's bounding client rectangle.\n *\n * The overlay and origin are outside view if there is no overlap between their bounding client\n * rectangle and any one of the strategy's Scrollable's bounding client rectangle.\n *\n * ----------- -----------\n * | outside | | clipped |\n * | view | --------------------------\n * | | | | | |\n * ---------- | ----------- |\n * -------------------------- | |\n * | | | Scrollable |\n * | | | |\n * | | --------------------------\n * | Scrollable |\n * | |\n * --------------------------\n *\n * @docs-private\n */\nclass ScrollingVisibility {\n isOriginClipped;\n isOriginOutsideView;\n isOverlayClipped;\n isOverlayOutsideView;\n}\n/** The change event emitted by the strategy when a fallback position is used. */\nclass ConnectedOverlayPositionChange {\n connectionPair;\n scrollableViewProperties;\n constructor(/** The position used as a result of this change. */\n connectionPair, /** @docs-private */\n scrollableViewProperties) {\n this.connectionPair = connectionPair;\n this.scrollableViewProperties = scrollableViewProperties;\n }\n}\n/**\n * Validates whether a vertical position property matches the expected values.\n * @param property Name of the property being validated.\n * @param value Value of the property being validated.\n * @docs-private\n */\nfunction validateVerticalPosition(property, value) {\n if (value !== 'top' && value !== 'bottom' && value !== 'center') {\n throw Error(`ConnectedPosition: Invalid ${property} \"${value}\". ` + `Expected \"top\", \"bottom\" or \"center\".`);\n }\n}\n/**\n * Validates whether a horizontal position property matches the expected values.\n * @param property Name of the property being validated.\n * @param value Value of the property being validated.\n * @docs-private\n */\nfunction validateHorizontalPosition(property, value) {\n if (value !== 'start' && value !== 'end' && value !== 'center') {\n throw Error(`ConnectedPosition: Invalid ${property} \"${value}\". ` + `Expected \"start\", \"end\" or \"center\".`);\n }\n}\n\n/**\n * Service for dispatching events that land on the body to appropriate overlay ref,\n * if any. It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\nlet BaseOverlayDispatcher = /*#__PURE__*/(() => {\n class BaseOverlayDispatcher {\n /** Currently attached overlays in the order they were attached. */\n _attachedOverlays = [];\n _document = inject(DOCUMENT);\n _isAttached;\n constructor() {}\n ngOnDestroy() {\n this.detach();\n }\n /** Add a new overlay to the list of attached overlay refs. */\n add(overlayRef) {\n // Ensure that we don't get the same overlay multiple times.\n this.remove(overlayRef);\n this._attachedOverlays.push(overlayRef);\n }\n /** Remove an overlay from the list of attached overlay refs. */\n remove(overlayRef) {\n const index = this._attachedOverlays.indexOf(overlayRef);\n if (index > -1) {\n this._attachedOverlays.splice(index, 1);\n }\n // Remove the global listener once there are no more overlays.\n if (this._attachedOverlays.length === 0) {\n this.detach();\n }\n }\n static ɵfac = function BaseOverlayDispatcher_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || BaseOverlayDispatcher)();\n };\n static ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: BaseOverlayDispatcher,\n factory: BaseOverlayDispatcher.ɵfac,\n providedIn: 'root'\n });\n }\n return BaseOverlayDispatcher;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n\n/**\n * Service for dispatching keyboard events that land on the body to appropriate overlay ref,\n * if any. It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\nlet OverlayKeyboardDispatcher = /*#__PURE__*/(() => {\n class OverlayKeyboardDispatcher extends BaseOverlayDispatcher {\n _ngZone = inject(NgZone);\n _renderer = inject(RendererFactory2).createRenderer(null, null);\n _cleanupKeydown;\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._ngZone.runOutsideAngular(() => {\n this._cleanupKeydown = this._renderer.listen('body', 'keydown', this._keydownListener);\n });\n this._isAttached = true;\n }\n }\n /** Detaches the global keyboard event listener. */\n detach() {\n if (this._isAttached) {\n this._cleanupKeydown?.();\n this._isAttached = false;\n }\n }\n /** Keyboard event listener that will be attached to the body. */\n _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 this._ngZone.run(() => overlays[i]._keydownEvents.next(event));\n break;\n }\n }\n };\n static ɵfac = /* @__PURE__ */(() => {\n let ɵOverlayKeyboardDispatcher_BaseFactory;\n return function OverlayKeyboardDispatcher_Factory(__ngFactoryType__) {\n return (ɵOverlayKeyboardDispatcher_BaseFactory || (ɵOverlayKeyboardDispatcher_BaseFactory = i0.ɵɵgetInheritedFactory(OverlayKeyboardDispatcher)))(__ngFactoryType__ || OverlayKeyboardDispatcher);\n };\n })();\n static ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: OverlayKeyboardDispatcher,\n factory: OverlayKeyboardDispatcher.ɵfac,\n providedIn: 'root'\n });\n }\n return OverlayKeyboardDispatcher;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n\n/**\n * Service for dispatching mouse click events that land on the body to appropriate overlay ref,\n * if any. It maintains a list of attached overlays to determine best suited overlay based\n * on event target and order of overlay opens.\n */\nlet OverlayOutsideClickDispatcher = /*#__PURE__*/(() => {\n class OverlayOutsideClickDispatcher extends BaseOverlayDispatcher {\n _platform = inject(Platform);\n _ngZone = inject(NgZone, {\n optional: true\n });\n _cursorOriginalValue;\n _cursorStyleIsSet = false;\n _pointerDownEventTarget;\n /** Add a new overlay to the list of attached overlay refs. */\n add(overlayRef) {\n super.add(overlayRef);\n // Safari on iOS does not generate click events for non-interactive\n // elements. However, we want to receive a click for any element outside\n // the overlay. We can force a \"clickable\" state by setting\n // `cursor: pointer` on the document body. See:\n // https://developer.mozilla.org/en-US/docs/Web/API/Element/click_event#Safari_Mobile\n // https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html\n if (!this._isAttached) {\n const body = this._document.body;\n /** @breaking-change 14.0.0 _ngZone will be required. */\n if (this._ngZone) {\n this._ngZone.runOutsideAngular(() => this._addEventListeners(body));\n } else {\n this._addEventListeners(body);\n }\n // click event is not fired on iOS. To make element \"clickable\" we are\n // setting the cursor to pointer\n if (this._platform.IOS && !this._cursorStyleIsSet) {\n this._cursorOriginalValue = body.style.cursor;\n body.style.cursor = 'pointer';\n this._cursorStyleIsSet = true;\n }\n this._isAttached = true;\n }\n }\n /** Detaches the global keyboard event listener. */\n detach() {\n if (this._isAttached) {\n const body = this._document.body;\n body.removeEventListener('pointerdown', this._pointerDownListener, true);\n body.removeEventListener('click', this._clickListener, true);\n body.removeEventListener('auxclick', this._clickListener, true);\n body.removeEventListener('contextmenu', this._clickListener, true);\n if (this._platform.IOS && this._cursorStyleIsSet) {\n body.style.cursor = this._cursorOriginalValue;\n this._cursorStyleIsSet = false;\n }\n this._isAttached = false;\n }\n }\n _addEventListeners(body) {\n body.addEventListener('pointerdown', this._pointerDownListener, true);\n body.addEventListener('click', this._clickListener, true);\n body.addEventListener('auxclick', this._clickListener, true);\n body.addEventListener('contextmenu', this._clickListener, true);\n }\n /** Store pointerdown event target to track origin of click. */\n _pointerDownListener = event => {\n this._pointerDownEventTarget = _getEventTarget(event);\n };\n /** Click event listener that will be attached to the body propagate phase. */\n _clickListener = event => {\n const target = _getEventTarget(event);\n // In case of a click event, we want to check the origin of the click\n // (e.g. in case where a user starts a click inside the overlay and\n // releases the click outside of it).\n // This is done by using the event target of the preceding pointerdown event.\n // Every click event caused by a pointer device has a preceding pointerdown\n // event, unless the click was programmatically triggered (e.g. in a unit test).\n const origin = event.type === 'click' && this._pointerDownEventTarget ? this._pointerDownEventTarget : target;\n // Reset the stored pointerdown event target, to avoid having it interfere\n // in subsequent events.\n this._pointerDownEventTarget = null;\n // We copy the array because the original may be modified asynchronously if the\n // outsidePointerEvents listener decides to detach overlays resulting in index errors inside\n // the for loop.\n const overlays = this._attachedOverlays.slice();\n // Dispatch the mouse event to the top overlay which has subscribers to its mouse events.\n // We want to target all overlays for which the click could be considered as outside click.\n // As soon as we reach an overlay for which the click is not outside click we break off\n // the loop.\n for (let i = overlays.length - 1; i > -1; i--) {\n const overlayRef = overlays[i];\n if (overlayRef._outsidePointerEvents.observers.length < 1 || !overlayRef.hasAttached()) {\n continue;\n }\n // If it's a click inside the overlay, just break - we should do nothing\n // If it's an outside click (both origin and target of the click) dispatch the mouse event,\n // and proceed with the next overlay\n if (containsPierceShadowDom(overlayRef.overlayElement, target) || containsPierceShadowDom(overlayRef.overlayElement, origin)) {\n break;\n }\n const outsidePointerEvents = overlayRef._outsidePointerEvents;\n /** @breaking-change 14.0.0 _ngZone will be required. */\n if (this._ngZone) {\n this._ngZone.run(() => outsidePointerEvents.next(event));\n } else {\n outsidePointerEvents.next(event);\n }\n }\n };\n static ɵfac = /* @__PURE__ */(() => {\n let ɵOverlayOutsideClickDispatcher_BaseFactory;\n return function OverlayOutsideClickDispatcher_Factory(__ngFactoryType__) {\n return (ɵOverlayOutsideClickDispatcher_BaseFactory || (ɵOverlayOutsideClickDispatcher_BaseFactory = i0.ɵɵgetInheritedFactory(OverlayOutsideClickDispatcher)))(__ngFactoryType__ || OverlayOutsideClickDispatcher);\n };\n })();\n static ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: OverlayOutsideClickDispatcher,\n factory: OverlayOutsideClickDispatcher.ɵfac,\n providedIn: 'root'\n });\n }\n return OverlayOutsideClickDispatcher;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n/** Version of `Element.contains` that transcends shadow DOM boundaries. */\nfunction containsPierceShadowDom(parent, child) {\n const supportsShadowRoot = typeof ShadowRoot !== 'undefined' && ShadowRoot;\n let current = child;\n while (current) {\n if (current === parent) {\n return true;\n }\n current = supportsShadowRoot && current instanceof ShadowRoot ? current.host : current.parentNode;\n }\n return false;\n}\nlet _CdkOverlayStyleLoader = /*#__PURE__*/(() => {\n class _CdkOverlayStyleLoader {\n static ɵfac = function _CdkOverlayStyleLoader_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || _CdkOverlayStyleLoader)();\n };\n static ɵcmp = /* @__PURE__ */i0.ɵɵdefineComponent({\n type: _CdkOverlayStyleLoader,\n selectors: [[\"ng-component\"]],\n hostAttrs: [\"cdk-overlay-style-loader\", \"\"],\n decls: 0,\n vars: 0,\n template: function _CdkOverlayStyleLoader_Template(rf, ctx) {},\n styles: [\".cdk-overlay-container,.cdk-global-overlay-wrapper{pointer-events:none;top:0;left:0;height:100%;width:100%}.cdk-overlay-container{position:fixed}@layer cdk-overlay{.cdk-overlay-container{z-index:1000}}.cdk-overlay-container:empty{display:none}.cdk-global-overlay-wrapper{display:flex;position:absolute}@layer cdk-overlay{.cdk-global-overlay-wrapper{z-index:1000}}.cdk-overlay-pane{position:absolute;pointer-events:auto;box-sizing:border-box;display:flex;max-width:100%;max-height:100%}@layer cdk-overlay{.cdk-overlay-pane{z-index:1000}}.cdk-overlay-backdrop{position:absolute;top:0;bottom:0;left:0;right:0;pointer-events:auto;-webkit-tap-highlight-color:rgba(0,0,0,0);opacity:0}@layer cdk-overlay{.cdk-overlay-backdrop{z-index:1000;transition:opacity 400ms cubic-bezier(0.25, 0.8, 0.25, 1)}}.cdk-overlay-backdrop-showing{opacity:1}@media(forced-colors: active){.cdk-overlay-backdrop-showing{opacity:.6}}@layer cdk-overlay{.cdk-overlay-dark-backdrop{background:rgba(0,0,0,.32)}}.cdk-overlay-transparent-backdrop{transition:visibility 1ms linear,opacity 1ms linear;visibility:hidden;opacity:1}.cdk-overlay-transparent-backdrop.cdk-overlay-backdrop-showing,.cdk-high-contrast-active .cdk-overlay-transparent-backdrop{opacity:0;visibility:visible}.cdk-overlay-backdrop-noop-animation{transition:none}.cdk-overlay-connected-position-bounding-box{position:absolute;display:flex;flex-direction:column;min-width:1px;min-height:1px}@layer cdk-overlay{.cdk-overlay-connected-position-bounding-box{z-index:1000}}.cdk-global-scrollblock{position:fixed;width:100%;overflow-y:scroll}\"],\n encapsulation: 2,\n changeDetection: 0\n });\n }\n return _CdkOverlayStyleLoader;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n/** Container inside which all overlays will render. */\nlet OverlayContainer = /*#__PURE__*/(() => {\n class OverlayContainer {\n _platform = inject(Platform);\n _containerElement;\n _document = inject(DOCUMENT);\n _styleLoader = inject(_CdkPrivateStyleLoader);\n constructor() {}\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 this._loadStyles();\n if (!this._containerElement) {\n this._createContainer();\n }\n return this._containerElement;\n }\n /**\n * Create the overlay container element, which is simply a div\n * with the 'cdk-overlay-container' class on the document body.\n */\n _createContainer() {\n const containerClass = 'cdk-overlay-container';\n // TODO(crisbeto): remove the testing check once we have an overlay testing\n // module or Angular starts tearing down the testing `NgModule`. See:\n // https://github.com/angular/angular/issues/18831\n if (this._platform.isBrowser || _isTestEnvironment()) {\n const oppositePlatformContainers = this._document.querySelectorAll(`.${containerClass}[platform=\"server\"], ` + `.${containerClass}[platform=\"test\"]`);\n // Remove any old containers from the opposite platform.\n // This can happen when transitioning from the server to the client.\n for (let i = 0; i < oppositePlatformContainers.length; i++) {\n oppositePlatformContainers[i].remove();\n }\n }\n const container = this._document.createElement('div');\n container.classList.add(containerClass);\n // A long time ago we kept adding new overlay containers whenever a new app was instantiated,\n // but at some point we added logic which clears the duplicate ones in order to avoid leaks.\n // The new logic was a little too aggressive since it was breaking some legitimate use cases.\n // To mitigate the problem we made it so that only containers from a different platform are\n // cleared, but the side-effect was that people started depending on the overly-aggressive\n // logic to clean up their tests for them. Until we can introduce an overlay-specific testing\n // module which does the cleanup, we try to detect that we're in a test environment and we\n // always clear the container. See #17006.\n // TODO(crisbeto): remove the test environment check once we have an overlay testing module.\n if (_isTestEnvironment()) {\n container.setAttribute('platform', 'test');\n } else if (!this._platform.isBrowser) {\n container.setAttribute('platform', 'server');\n }\n this._document.body.appendChild(container);\n this._containerElement = container;\n }\n /** Loads the structural styles necessary for the overlay to work. */\n _loadStyles() {\n this._styleLoader.load(_CdkOverlayStyleLoader);\n }\n static ɵfac = function OverlayContainer_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || OverlayContainer)();\n };\n static ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: OverlayContainer,\n factory: OverlayContainer.ɵfac,\n providedIn: 'root'\n });\n }\n return OverlayContainer;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n\n/**\n * Reference to an overlay that has been created with the Overlay service.\n * Used to manipulate or dispose of said overlay.\n */\nclass OverlayRef {\n _portalOutlet;\n _host;\n _pane;\n _config;\n _ngZone;\n _keyboardDispatcher;\n _document;\n _location;\n _outsideClickDispatcher;\n _animationsDisabled;\n _injector;\n _renderer;\n _backdropElement = null;\n _backdropTimeout;\n _backdropClick = /*#__PURE__*/new Subject();\n _attachments = /*#__PURE__*/new Subject();\n _detachments = /*#__PURE__*/new Subject();\n _positionStrategy;\n _scrollStrategy;\n _locationChanges = Subscription.EMPTY;\n _cleanupBackdropClick;\n _cleanupBackdropTransitionEnd;\n /**\n * Reference to the parent of the `_host` at the time it was detached. Used to restore\n * the `_host` to its original position in the DOM when it gets re-attached.\n */\n _previousHostParent;\n /** Stream of keydown events dispatched to this overlay. */\n _keydownEvents = /*#__PURE__*/new Subject();\n /** Stream of mouse outside events dispatched to this overlay. */\n _outsidePointerEvents = /*#__PURE__*/new Subject();\n _renders = /*#__PURE__*/new Subject();\n _afterRenderRef;\n /** Reference to the currently-running `afterNextRender` call. */\n _afterNextRenderRef;\n constructor(_portalOutlet, _host, _pane, _config, _ngZone, _keyboardDispatcher, _document, _location, _outsideClickDispatcher, _animationsDisabled = false, _injector, _renderer) {\n this._portalOutlet = _portalOutlet;\n this._host = _host;\n this._pane = _pane;\n this._config = _config;\n this._ngZone = _ngZone;\n this._keyboardDispatcher = _keyboardDispatcher;\n this._document = _document;\n this._location = _location;\n this._outsideClickDispatcher = _outsideClickDispatcher;\n this._animationsDisabled = _animationsDisabled;\n this._injector = _injector;\n this._renderer = _renderer;\n if (_config.scrollStrategy) {\n this._scrollStrategy = _config.scrollStrategy;\n this._scrollStrategy.attach(this);\n }\n this._positionStrategy = _config.positionStrategy;\n // Users could open the overlay from an `effect`, in which case we need to\n // run the `afterRender` as `untracked`. We don't recommend that users do\n // this, but we also don't want to break users who are doing it.\n this._afterRenderRef = untracked(() => afterRender(() => {\n this._renders.next();\n }, {\n injector: this._injector\n }));\n }\n /** The overlay's HTML element */\n get overlayElement() {\n return this._pane;\n }\n /** The overlay's backdrop HTML element. */\n get backdropElement() {\n return this._backdropElement;\n }\n /**\n * Wrapper around the panel element. Can be used for advanced\n * positioning where a wrapper with specific styling is\n * required around the overlay pane.\n */\n get hostElement() {\n return this._host;\n }\n /**\n * Attaches content, given via a Portal, to the overlay.\n * If the overlay is configured to have a backdrop, it will be created.\n *\n * @param portal Portal instance to which to attach the overlay.\n * @returns The portal attachment result.\n */\n attach(portal) {\n // Insert the host into the DOM before attaching the portal, otherwise\n // the animations module will skip animations on repeat attachments.\n if (!this._host.parentElement && this._previousHostParent) {\n this._previousHostParent.appendChild(this._host);\n }\n const attachResult = this._portalOutlet.attach(portal);\n if (this._positionStrategy) {\n this._positionStrategy.attach(this);\n }\n this._updateStackingOrder();\n this._updateElementSize();\n this._updateElementDirection();\n if (this._scrollStrategy) {\n this._scrollStrategy.enable();\n }\n // We need to clean this up ourselves, because we're passing in an\n // `EnvironmentInjector` below which won't ever be destroyed.\n // Otherwise it causes some callbacks to be retained (see #29696).\n this._afterNextRenderRef?.destroy();\n // Update the position once the overlay is fully rendered before attempting to position it,\n // as the position may depend on the size of the rendered content.\n this._afterNextRenderRef = afterNextRender(() => {\n // The overlay could've been detached before the callback executed.\n if (this.hasAttached()) {\n this.updatePosition();\n }\n }, {\n injector: this._injector\n });\n // Enable pointer events for the overlay pane element.\n this._togglePointerEvents(true);\n if (this._config.hasBackdrop) {\n this._attachBackdrop();\n }\n if (this._config.panelClass) {\n this._toggleClasses(this._pane, this._config.panelClass, true);\n }\n // Only emit the `attachments` event once all other setup is done.\n this._attachments.next();\n // Track this overlay by the keyboard dispatcher\n this._keyboardDispatcher.add(this);\n if (this._config.disposeOnNavigation) {\n this._locationChanges = this._location.subscribe(() => this.dispose());\n }\n this._outsideClickDispatcher.add(this);\n // TODO(crisbeto): the null check is here, because the portal outlet returns `any`.\n // We should be guaranteed for the result to be `ComponentRef | EmbeddedViewRef`, but\n // `instanceof EmbeddedViewRef` doesn't appear to work at the moment.\n if (typeof attachResult?.onDestroy === 'function') {\n // In most cases we control the portal and we know when it is being detached so that\n // we can finish the disposal process. The exception is if the user passes in a custom\n // `ViewContainerRef` that isn't destroyed through the overlay API. Note that we use\n // `detach` here instead of `dispose`, because we don't know if the user intends to\n // reattach the overlay at a later point. It also has the advantage of waiting for animations.\n attachResult.onDestroy(() => {\n if (this.hasAttached()) {\n // We have to delay the `detach` call, because detaching immediately prevents\n // other destroy hooks from running. This is likely a framework bug similar to\n // https://github.com/angular/angular/issues/46119\n this._ngZone.runOutsideAngular(() => Promise.resolve().then(() => this.detach()));\n }\n });\n }\n return attachResult;\n }\n /**\n * Detaches an overlay from a portal.\n * @returns The portal detachment result.\n */\n detach() {\n if (!this.hasAttached()) {\n return;\n }\n this.detachBackdrop();\n // When the overlay is detached, the pane element should disable pointer events.\n // This is necessary because otherwise the pane element will cover the page and disable\n // pointer events therefore. Depends on the position strategy and the applied pane boundaries.\n this._togglePointerEvents(false);\n if (this._positionStrategy && this._positionStrategy.detach) {\n this._positionStrategy.detach();\n }\n if (this._scrollStrategy) {\n this._scrollStrategy.disable();\n }\n const detachmentResult = this._portalOutlet.detach();\n // Only emit after everything is detached.\n this._detachments.next();\n // Remove this overlay from keyboard dispatcher tracking.\n this._keyboardDispatcher.remove(this);\n // Keeping the host element in the DOM can cause scroll jank, because it still gets\n // rendered, even though it's transparent and unclickable which is why we remove it.\n this._detachContentWhenEmpty();\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._afterNextRenderRef?.destroy();\n this._previousHostParent = this._pane = this._host = null;\n if (isAttached) {\n this._detachments.next();\n }\n this._detachments.complete();\n this._afterRenderRef.destroy();\n this._renders.complete();\n }\n /** Whether the overlay has attached content. */\n hasAttached() {\n return this._portalOutlet.hasAttached();\n }\n /** Gets an observable that emits when the backdrop has been clicked. */\n backdropClick() {\n return this._backdropClick;\n }\n /** Gets an observable that emits when the overlay has been attached. */\n attachments() {\n return this._attachments;\n }\n /** Gets an observable that emits when the overlay has been detached. */\n detachments() {\n return this._detachments;\n }\n /** Gets an observable of keydown events targeted to this overlay. */\n keydownEvents() {\n return this._keydownEvents;\n }\n /** Gets an observable of pointer events targeted outside this overlay. */\n outsidePointerEvents() {\n return this._outsidePointerEvents;\n }\n /** Gets the current overlay configuration, which is immutable. */\n getConfig() {\n return this._config;\n }\n /** Updates the position of the overlay based on the position strategy. */\n updatePosition() {\n if (this._positionStrategy) {\n this._positionStrategy.apply();\n }\n }\n /** Switches to a new position strategy and updates the overlay position. */\n updatePositionStrategy(strategy) {\n if (strategy === this._positionStrategy) {\n return;\n }\n if (this._positionStrategy) {\n this._positionStrategy.dispose();\n }\n this._positionStrategy = strategy;\n if (this.hasAttached()) {\n strategy.attach(this);\n this.updatePosition();\n }\n }\n /** Update the size properties of the overlay. */\n updateSize(sizeConfig) {\n this._config = {\n ...this._config,\n ...sizeConfig\n };\n this._updateElementSize();\n }\n /** Sets the LTR/RTL direction for the overlay. */\n setDirection(dir) {\n this._config = {\n ...this._config,\n direction: dir\n };\n this._updateElementDirection();\n }\n /** Add a CSS class or an array of classes to the overlay pane. */\n addPanelClass(classes) {\n if (this._pane) {\n this._toggleClasses(this._pane, classes, true);\n }\n }\n /** Remove a CSS class or an array of classes from the overlay pane. */\n removePanelClass(classes) {\n if (this._pane) {\n this._toggleClasses(this._pane, classes, false);\n }\n }\n /**\n * Returns the layout direction of the overlay panel.\n */\n getDirection() {\n const direction = this._config.direction;\n if (!direction) {\n return 'ltr';\n }\n return typeof direction === 'string' ? direction : direction.value;\n }\n /** Switches to a new scroll strategy. */\n updateScrollStrategy(strategy) {\n if (strategy === this._scrollStrategy) {\n return;\n }\n this._disposeScrollStrategy();\n this._scrollStrategy = strategy;\n if (this.hasAttached()) {\n strategy.attach(this);\n strategy.enable();\n }\n }\n /** Updates the text direction of the overlay panel. */\n _updateElementDirection() {\n this._host.setAttribute('dir', this.getDirection());\n }\n /** Updates the size of the overlay element based on the overlay config. */\n _updateElementSize() {\n if (!this._pane) {\n return;\n }\n const style = this._pane.style;\n style.width = coerceCssPixelValue(this._config.width);\n style.height = coerceCssPixelValue(this._config.height);\n style.minWidth = coerceCssPixelValue(this._config.minWidth);\n style.minHeight = coerceCssPixelValue(this._config.minHeight);\n style.maxWidth = coerceCssPixelValue(this._config.maxWidth);\n style.maxHeight = coerceCssPixelValue(this._config.maxHeight);\n }\n /** Toggles the pointer events for the overlay pane element. */\n _togglePointerEvents(enablePointer) {\n this._pane.style.pointerEvents = enablePointer ? '' : 'none';\n }\n /** Attaches a backdrop for this overlay. */\n _attachBackdrop() {\n const showingClass = 'cdk-overlay-backdrop-showing';\n this._backdropElement = this._document.createElement('div');\n this._backdropElement.classList.add('cdk-overlay-backdrop');\n if (this._animationsDisabled) {\n this._backdropElement.classList.add('cdk-overlay-backdrop-noop-animation');\n }\n if (this._config.backdropClass) {\n this._toggleClasses(this._backdropElement, this._config.backdropClass, true);\n }\n // Insert the backdrop before the pane in the DOM order,\n // in order to handle stacked overlays properly.\n this._host.parentElement.insertBefore(this._backdropElement, this._host);\n // Forward backdrop clicks such that the consumer of the overlay can perform whatever\n // action desired when such a click occurs (usually closing the overlay).\n this._cleanupBackdropClick?.();\n this._cleanupBackdropClick = this._renderer.listen(this._backdropElement, 'click', event => this._backdropClick.next(event));\n // Add class to fade-in the backdrop after one frame.\n if (!this._animationsDisabled && typeof requestAnimationFrame !== 'undefined') {\n this._ngZone.runOutsideAngular(() => {\n requestAnimationFrame(() => {\n if (this._backdropElement) {\n this._backdropElement.classList.add(showingClass);\n }\n });\n });\n } else {\n this._backdropElement.classList.add(showingClass);\n }\n }\n /**\n * Updates the stacking order of the element, moving it to the top if necessary.\n * This is required in cases where one overlay was detached, while another one,\n * that should be behind it, was destroyed. The next time both of them are opened,\n * the stacking will be wrong, because the detached element's pane will still be\n * in its original DOM position.\n */\n _updateStackingOrder() {\n if (this._host.nextSibling) {\n this._host.parentNode.appendChild(this._host);\n }\n }\n /** Detaches the backdrop (if any) associated with the overlay. */\n detachBackdrop() {\n const backdropToDetach = this._backdropElement;\n if (!backdropToDetach) {\n return;\n }\n if (this._animationsDisabled) {\n this._disposeBackdrop(backdropToDetach);\n return;\n }\n backdropToDetach.classList.remove('cdk-overlay-backdrop-showing');\n this._ngZone.runOutsideAngular(() => {\n this._cleanupBackdropTransitionEnd?.();\n this._cleanupBackdropTransitionEnd = this._renderer.listen(backdropToDetach, 'transitionend', event => {\n this._disposeBackdrop(event.target);\n });\n });\n // If the backdrop doesn't have a transition, the `transitionend` event won't fire.\n // In this case we make it unclickable and we try to remove it after a delay.\n backdropToDetach.style.pointerEvents = 'none';\n // Run this outside the Angular zone because there's nothing that Angular cares about.\n // If it were to run inside the Angular zone, every test that used Overlay would have to be\n // either async or fakeAsync.\n this._backdropTimeout = this._ngZone.runOutsideAngular(() => setTimeout(() => {\n this._disposeBackdrop(backdropToDetach);\n }, 500));\n }\n /** Toggles a single CSS class or an array of classes on an element. */\n _toggleClasses(element, cssClasses, isAdd) {\n const classes = coerceArray(cssClasses || []).filter(c => !!c);\n if (classes.length) {\n isAdd ? element.classList.add(...classes) : element.classList.remove(...classes);\n }\n }\n /** Detaches the overlay content next time the zone stabilizes. */\n _detachContentWhenEmpty() {\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._renders.pipe(takeUntil(merge(this._attachments, this._detachments))).subscribe(() => {\n // Needs a couple of checks for the pane and host, because\n // they may have been removed by the time the zone stabilizes.\n if (!this._pane || !this._host || this._pane.children.length === 0) {\n if (this._pane && this._config.panelClass) {\n this._toggleClasses(this._pane, this._config.panelClass, false);\n }\n if (this._host && this._host.parentElement) {\n this._previousHostParent = this._host.parentElement;\n this._host.remove();\n }\n subscription.unsubscribe();\n }\n });\n });\n }\n /** Disposes of a scroll strategy. */\n _disposeScrollStrategy() {\n const scrollStrategy = this._scrollStrategy;\n if (scrollStrategy) {\n scrollStrategy.disable();\n if (scrollStrategy.detach) {\n scrollStrategy.detach();\n }\n }\n }\n /** Removes a backdrop element from the DOM. */\n _disposeBackdrop(backdrop) {\n this._cleanupBackdropClick?.();\n this._cleanupBackdropTransitionEnd?.();\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 if (this._backdropTimeout) {\n clearTimeout(this._backdropTimeout);\n this._backdropTimeout = undefined;\n }\n }\n}\n\n// TODO: refactor clipping detection into a separate thing (part of scrolling module)\n// TODO: doesn't handle both flexible width and height when it has to scroll along both axis.\n/** Class to be added to the overlay bounding box. */\nconst boundingBoxClass = 'cdk-overlay-connected-position-bounding-box';\n/** Regex used to split a string on its CSS units. */\nconst cssUnitPattern = /([A-Za-z%]+)$/;\n/**\n * A strategy for positioning overlays. Using this strategy, an overlay is given an\n * implicit position relative some origin element. The relative position is defined in terms of\n * a point on the origin element that is connected to a point on the overlay element. For example,\n * a basic dropdown is connecting the bottom-left corner of the origin to the top-left corner\n * of the overlay.\n */\nclass FlexibleConnectedPositionStrategy {\n _viewportRuler;\n _document;\n _platform;\n _overlayContainer;\n /** The overlay to which this strategy is attached. */\n _overlayRef;\n /** Whether we're performing the very first positioning of the overlay. */\n _isInitialRender;\n /** Last size used for the bounding box. Used to avoid resizing the overlay after open. */\n _lastBoundingBoxSize = {\n width: 0,\n height: 0\n };\n /** Whether the overlay was pushed in a previous positioning. */\n _isPushed = false;\n /** Whether the overlay can be pushed on-screen on the initial open. */\n _canPush = true;\n /** Whether the overlay can grow via flexible width/height after the initial open. */\n _growAfterOpen = false;\n /** Whether the overlay's width and height can be constrained to fit within the viewport. */\n _hasFlexibleDimensions = true;\n /** Whether the overlay position is locked. */\n _positionLocked = false;\n /** Cached origin dimensions */\n _originRect;\n /** Cached overlay dimensions */\n _overlayRect;\n /** Cached viewport dimensions */\n _viewportRect;\n /** Cached container dimensions */\n _containerRect;\n /** Amount of space that must be maintained between the overlay and the edge of the viewport. */\n _viewportMargin = 0;\n /** The Scrollable containers used to check scrollable view properties on position change. */\n _scrollables = [];\n /** Ordered list of preferred positions, from most to least desirable. */\n _preferredPositions = [];\n /** The origin element against which the overlay will be positioned. */\n _origin;\n /** The overlay pane element. */\n _pane;\n /** Whether the strategy has been disposed of already. */\n _isDisposed;\n /**\n * Parent element for the overlay panel used to constrain the overlay panel's size to fit\n * within the viewport.\n */\n _boundingBox;\n /** The last position to have been calculated as the best fit position. */\n _lastPosition;\n /** The last calculated scroll visibility. Only tracked */\n _lastScrollVisibility;\n /** Subject that emits whenever the position changes. */\n _positionChanges = /*#__PURE__*/new Subject();\n /** Subscription to viewport size changes. */\n _resizeSubscription = Subscription.EMPTY;\n /** Default offset for the overlay along the x axis. */\n _offsetX = 0;\n /** Default offset for the overlay along the y axis. */\n _offsetY = 0;\n /** Selector to be used when finding the elements on which to set the transform origin. */\n _transformOriginSelector;\n /** Keeps track of the CSS classes that the position strategy has applied on the overlay panel. */\n _appliedPanelClasses = [];\n /** Amount by which the overlay was pushed in each axis during the last time it was positioned. */\n _previousPushAmount;\n /** Observable sequence of position changes. */\n positionChanges = this._positionChanges;\n /** Ordered list of preferred positions, from most to least desirable. */\n get positions() {\n return this._preferredPositions;\n }\n constructor(connectedTo, _viewportRuler, _document, _platform, _overlayContainer) {\n this._viewportRuler = _viewportRuler;\n this._document = _document;\n this._platform = _platform;\n this._overlayContainer = _overlayContainer;\n this.setOrigin(connectedTo);\n }\n /** Attaches this position strategy to an overlay. */\n attach(overlayRef) {\n if (this._overlayRef && overlayRef !== this._overlayRef && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw Error('This position strategy is already attached to an overlay');\n }\n this._validatePositions();\n overlayRef.hostElement.classList.add(boundingBoxClass);\n this._overlayRef = overlayRef;\n this._boundingBox = overlayRef.hostElement;\n this._pane = overlayRef.overlayElement;\n this._isDisposed = false;\n this._isInitialRender = true;\n this._lastPosition = null;\n this._resizeSubscription.unsubscribe();\n this._resizeSubscription = this._viewportRuler.change().subscribe(() => {\n // When the window is resized, we want to trigger the next reposition as if it\n // was an initial render, in order for the strategy to pick a new optimal position,\n // otherwise position locking will cause it to stay at the old one.\n this._isInitialRender = true;\n this.apply();\n });\n }\n /**\n * Updates the position of the overlay element, using whichever preferred position relative\n * to the origin best fits on-screen.\n *\n * The selection of a position goes as follows:\n * - If any positions fit completely within the viewport as-is,\n * choose the first position that does so.\n * - If flexible dimensions are enabled and at least one satisfies the given minimum width/height,\n * choose the position with the greatest available size modified by the positions' weight.\n * - If pushing is enabled, take the position that went off-screen the least and push it\n * on-screen.\n * - If none of the previous criteria were met, use the position that goes off-screen the least.\n * @docs-private\n */\n apply() {\n // We shouldn't do anything if the strategy was disposed or we're on the server.\n if (this._isDisposed || !this._platform.isBrowser) {\n return;\n }\n // If the position has been applied already (e.g. when the overlay was opened) and the\n // consumer opted into locking in the position, re-use the old position, in order to\n // prevent the overlay from jumping around.\n if (!this._isInitialRender && this._positionLocked && this._lastPosition) {\n this.reapplyLastPosition();\n return;\n }\n this._clearPanelClasses();\n this._resetOverlayElementStyles();\n this._resetBoundingBoxStyles();\n // We need the bounding rects for the origin, the overlay and the container to determine how to position\n // the overlay relative to the origin.\n // We use the viewport rect to determine whether a position would go off-screen.\n this._viewportRect = this._getNarrowedViewportRect();\n this._originRect = this._getOriginRect();\n this._overlayRect = this._pane.getBoundingClientRect();\n this._containerRect = this._overlayContainer.getContainerElement().getBoundingClientRect();\n const originRect = this._originRect;\n const overlayRect = this._overlayRect;\n const viewportRect = this._viewportRect;\n const containerRect = this._containerRect;\n // Positions where the overlay will fit with flexible dimensions.\n const flexibleFits = [];\n // Fallback if none of the preferred positions fit within the viewport.\n let fallback;\n // Go through each of the preferred positions looking for a good fit.\n // If a good fit is found, it will be applied immediately.\n for (let pos of this._preferredPositions) {\n // Get the exact (x, y) coordinate for the point-of-origin on the origin element.\n let originPoint = this._getOriginPoint(originRect, containerRect, pos);\n // From that point-of-origin, get the exact (x, y) coordinate for the top-left corner of the\n // overlay in this position. We use the top-left corner for calculations and later translate\n // this into an appropriate (top, left, bottom, right) style.\n let overlayPoint = this._getOverlayPoint(originPoint, overlayRect, pos);\n // Calculate how well the overlay would fit into the viewport with this point.\n let overlayFit = this._getOverlayFit(overlayPoint, overlayRect, viewportRect, pos);\n // If the overlay, without any further work, fits into the viewport, use this position.\n if (overlayFit.isCompletelyWithinViewport) {\n this._isPushed = false;\n this._applyPosition(pos, originPoint);\n return;\n }\n // If the overlay has flexible dimensions, we can use this position\n // so long as there's enough space for the minimum dimensions.\n if (this._canFitWithFlexibleDimensions(overlayFit, overlayPoint, viewportRect)) {\n // Save positions where the overlay will fit with flexible dimensions. We will use these\n // if none of the positions fit *without* flexible dimensions.\n flexibleFits.push({\n position: pos,\n origin: originPoint,\n overlayRect,\n boundingBoxRect: this._calculateBoundingBoxRect(originPoint, pos)\n });\n continue;\n }\n // If the current preferred position does not fit on the screen, remember the position\n // if it has more visible area on-screen than we've seen and move onto the next preferred\n // position.\n if (!fallback || fallback.overlayFit.visibleArea < overlayFit.visibleArea) {\n fallback = {\n overlayFit,\n overlayPoint,\n originPoint,\n position: pos,\n overlayRect\n };\n }\n }\n // If there are any positions where the overlay would fit with flexible dimensions, choose the\n // one that has the greatest area available modified by the position's weight\n if (flexibleFits.length) {\n let bestFit = null;\n let bestScore = -1;\n for (const fit of flexibleFits) {\n const score = fit.boundingBoxRect.width * fit.boundingBoxRect.height * (fit.position.weight || 1);\n if (score > bestScore) {\n bestScore = score;\n bestFit = fit;\n }\n }\n this._isPushed = false;\n this._applyPosition(bestFit.position, bestFit.origin);\n return;\n }\n // When none of the preferred positions fit within the viewport, take the position\n // that went off-screen the least and attempt to push it on-screen.\n if (this._canPush) {\n // TODO(jelbourn): after pushing, the opening \"direction\" of the overlay might not make sense.\n this._isPushed = true;\n this._applyPosition(fallback.position, fallback.originPoint);\n return;\n }\n // All options for getting the overlay within the viewport have been exhausted, so go with the\n // position that went off-screen the least.\n this._applyPosition(fallback.position, fallback.originPoint);\n }\n detach() {\n this._clearPanelClasses();\n this._lastPosition = null;\n this._previousPushAmount = null;\n this._resizeSubscription.unsubscribe();\n }\n /** Cleanup after the element gets destroyed. */\n dispose() {\n if (this._isDisposed) {\n return;\n }\n // We can't use `_resetBoundingBoxStyles` here, because it resets\n // some properties to zero, rather than removing them.\n if (this._boundingBox) {\n extendStyles(this._boundingBox.style, {\n top: '',\n left: '',\n right: '',\n bottom: '',\n height: '',\n width: '',\n alignItems: '',\n justifyContent: ''\n });\n }\n if (this._pane) {\n this._resetOverlayElementStyles();\n }\n if (this._overlayRef) {\n this._overlayRef.hostElement.classList.remove(boundingBoxClass);\n }\n this.detach();\n this._positionChanges.complete();\n this._overlayRef = this._boundingBox = null;\n this._isDisposed = true;\n }\n /**\n * This re-aligns the overlay element with the trigger in its last calculated position,\n * even if a position higher in the \"preferred positions\" list would now fit. This\n * allows one to re-align the panel without changing the orientation of the panel.\n */\n reapplyLastPosition() {\n if (this._isDisposed || !this._platform.isBrowser) {\n return;\n }\n const lastPosition = this._lastPosition;\n if (lastPosition) {\n this._originRect = this._getOriginRect();\n this._overlayRect = this._pane.getBoundingClientRect();\n this._viewportRect = this._getNarrowedViewportRect();\n this._containerRect = this._overlayContainer.getContainerElement().getBoundingClientRect();\n const originPoint = this._getOriginPoint(this._originRect, this._containerRect, lastPosition);\n this._applyPosition(lastPosition, originPoint);\n } else {\n this.apply();\n }\n }\n /**\n * Sets the list of Scrollable containers that host the origin element so that\n * on reposition we can evaluate if it or the overlay has been clipped or outside view. Every\n * Scrollable must be an ancestor element of the strategy's origin element.\n */\n withScrollableContainers(scrollables) {\n this._scrollables = scrollables;\n return this;\n }\n /**\n * Adds new preferred positions.\n * @param positions List of positions options for this overlay.\n */\n withPositions(positions) {\n this._preferredPositions = positions;\n // If the last calculated position object isn't part of the positions anymore, clear\n // it in order to avoid it being picked up if the consumer tries to re-apply.\n if (positions.indexOf(this._lastPosition) === -1) {\n this._lastPosition = null;\n }\n this._validatePositions();\n return this;\n }\n /**\n * Sets a minimum distance the overlay may be positioned to the edge of the viewport.\n * @param margin Required margin between the overlay and the viewport edge in pixels.\n */\n withViewportMargin(margin) {\n this._viewportMargin = margin;\n return this;\n }\n /** Sets whether the overlay's width and height can be constrained to fit within the viewport. */\n withFlexibleDimensions(flexibleDimensions = true) {\n this._hasFlexibleDimensions = flexibleDimensions;\n return this;\n }\n /** Sets whether the overlay can grow after the initial open via flexible width/height. */\n withGrowAfterOpen(growAfterOpen = true) {\n this._growAfterOpen = growAfterOpen;\n return this;\n }\n /** Sets whether the overlay can be pushed on-screen if none of the provided positions fit. */\n withPush(canPush = true) {\n this._canPush = canPush;\n return this;\n }\n /**\n * Sets whether the overlay's position should be locked in after it is positioned\n * initially. When an overlay is locked in, it won't attempt to reposition itself\n * when the position is re-applied (e.g. when the user scrolls away).\n * @param isLocked Whether the overlay should locked in.\n */\n withLockedPosition(isLocked = true) {\n this._positionLocked = isLocked;\n return this;\n }\n /**\n * Sets the origin, relative to which to position the overlay.\n * Using an element origin is useful for building components that need to be positioned\n * relatively to a trigger (e.g. dropdown menus or tooltips), whereas using a point can be\n * used for cases like contextual menus which open relative to the user's pointer.\n * @param origin Reference to the new origin.\n */\n setOrigin(origin) {\n this._origin = origin;\n return this;\n }\n /**\n * Sets the default offset for the overlay's connection point on the x-axis.\n * @param offset New offset in the X axis.\n */\n withDefaultOffsetX(offset) {\n this._offsetX = offset;\n return this;\n }\n /**\n * Sets the default offset for the overlay's connection point on the y-axis.\n * @param offset New offset in the Y axis.\n */\n withDefaultOffsetY(offset) {\n this._offsetY = offset;\n return this;\n }\n /**\n * Configures that the position strategy should set a `transform-origin` on some elements\n * inside the overlay, depending on the current position that is being applied. This is\n * useful for the cases where the origin of an animation can change depending on the\n * alignment of the overlay.\n * @param selector CSS selector that will be used to find the target\n * elements onto which to set the transform origin.\n */\n withTransformOriginOn(selector) {\n this._transformOriginSelector = selector;\n return this;\n }\n /**\n * Gets the (x, y) coordinate of a connection point on the origin based on a relative position.\n */\n _getOriginPoint(originRect, containerRect, pos) {\n let x;\n if (pos.originX == 'center') {\n // Note: when centering we should always use the `left`\n // offset, otherwise the position will be wrong in RTL.\n x = originRect.left + originRect.width / 2;\n } else {\n const startX = this._isRtl() ? originRect.right : originRect.left;\n const endX = this._isRtl() ? originRect.left : originRect.right;\n x = pos.originX == 'start' ? startX : endX;\n }\n // When zooming in Safari the container rectangle contains negative values for the position\n // and we need to re-add them to the calculated coordinates.\n if (containerRect.left < 0) {\n x -= containerRect.left;\n }\n let y;\n if (pos.originY == 'center') {\n y = originRect.top + originRect.height / 2;\n } else {\n y = pos.originY == 'top' ? originRect.top : originRect.bottom;\n }\n // Normally the containerRect's top value would be zero, however when the overlay is attached to an input\n // (e.g. in an autocomplete), mobile browsers will shift everything in order to put the input in the middle\n // of the screen and to make space for the virtual keyboard. We need to account for this offset,\n // otherwise our positioning will be thrown off.\n // Additionally, when zooming in Safari this fixes the vertical position.\n if (containerRect.top < 0) {\n y -= containerRect.top;\n }\n return {\n x,\n y\n };\n }\n /**\n * Gets the (x, y) coordinate of the top-left corner of the overlay given a given position and\n * origin point to which the overlay should be connected.\n */\n _getOverlayPoint(originPoint, overlayRect, pos) {\n // Calculate the (overlayStartX, overlayStartY), the start of the\n // potential overlay position relative to the origin point.\n let overlayStartX;\n if (pos.overlayX == 'center') {\n overlayStartX = -overlayRect.width / 2;\n } else if (pos.overlayX === 'start') {\n overlayStartX = this._isRtl() ? -overlayRect.width : 0;\n } else {\n overlayStartX = this._isRtl() ? 0 : -overlayRect.width;\n }\n let overlayStartY;\n if (pos.overlayY == 'center') {\n overlayStartY = -overlayRect.height / 2;\n } else {\n overlayStartY = pos.overlayY == 'top' ? 0 : -overlayRect.height;\n }\n // The (x, y) coordinates of the overlay.\n return {\n x: originPoint.x + overlayStartX,\n y: originPoint.y + overlayStartY\n };\n }\n /** Gets how well an overlay at the given point will fit within the viewport. */\n _getOverlayFit(point, rawOverlayRect, viewport, position) {\n // Round the overlay rect when comparing against the\n // viewport, because the viewport is always rounded.\n const overlay = getRoundedBoundingClientRect(rawOverlayRect);\n let {\n x,\n y\n } = point;\n let offsetX = this._getOffset(position, 'x');\n let offsetY = this._getOffset(position, 'y');\n // Account for the offsets since they could push the overlay out of the viewport.\n if (offsetX) {\n x += offsetX;\n }\n if (offsetY) {\n y += offsetY;\n }\n // How much the overlay would overflow at this position, on each side.\n let leftOverflow = 0 - x;\n let rightOverflow = x + overlay.width - viewport.width;\n let topOverflow = 0 - y;\n let bottomOverflow = y + overlay.height - viewport.height;\n // Visible parts of the element on each axis.\n let visibleWidth = this._subtractOverflows(overlay.width, leftOverflow, rightOverflow);\n let visibleHeight = this._subtractOverflows(overlay.height, topOverflow, bottomOverflow);\n let visibleArea = visibleWidth * visibleHeight;\n return {\n visibleArea,\n isCompletelyWithinViewport: overlay.width * overlay.height === visibleArea,\n fitsInViewportVertically: visibleHeight === overlay.height,\n fitsInViewportHorizontally: visibleWidth == overlay.width\n };\n }\n /**\n * Whether the overlay can fit within the viewport when it may resize either its width or height.\n * @param fit How well the overlay fits in the viewport at some position.\n * @param point The (x, y) coordinates of the overlay at some position.\n * @param viewport The geometry of the viewport.\n */\n _canFitWithFlexibleDimensions(fit, point, viewport) {\n if (this._hasFlexibleDimensions) {\n const availableHeight = viewport.bottom - point.y;\n const availableWidth = viewport.right - point.x;\n const minHeight = getPixelValue(this._overlayRef.getConfig().minHeight);\n const minWidth = getPixelValue(this._overlayRef.getConfig().minWidth);\n const verticalFit = fit.fitsInViewportVertically || minHeight != null && minHeight <= availableHeight;\n const horizontalFit = fit.fitsInViewportHorizontally || minWidth != null && minWidth <= availableWidth;\n return verticalFit && horizontalFit;\n }\n return false;\n }\n /**\n * Gets the point at which the overlay can be \"pushed\" on-screen. If the overlay is larger than\n * the viewport, the top-left corner will be pushed on-screen (with overflow occurring on the\n * right and bottom).\n *\n * @param start Starting point from which the overlay is pushed.\n * @param rawOverlayRect Dimensions of the overlay.\n * @param scrollPosition Current viewport scroll position.\n * @returns The point at which to position the overlay after pushing. This is effectively a new\n * originPoint.\n */\n _pushOverlayOnScreen(start, rawOverlayRect, scrollPosition) {\n // If the position is locked and we've pushed the overlay already, reuse the previous push\n // amount, rather than pushing it again. If we were to continue pushing, the element would\n // remain in the viewport, which goes against the expectations when position locking is enabled.\n if (this._previousPushAmount && this._positionLocked) {\n return {\n x: start.x + this._previousPushAmount.x,\n y: start.y + this._previousPushAmount.y\n };\n }\n // Round the overlay rect when comparing against the\n // viewport, because the viewport is always rounded.\n const overlay = getRoundedBoundingClientRect(rawOverlayRect);\n const viewport = this._viewportRect;\n // Determine how much the overlay goes outside the viewport on each\n // side, which we'll use to decide which direction to push it.\n const overflowRight = Math.max(start.x + overlay.width - viewport.width, 0);\n const overflowBottom = Math.max(start.y + overlay.height - viewport.height, 0);\n const overflowTop = Math.max(viewport.top - scrollPosition.top - start.y, 0);\n const overflowLeft = Math.max(viewport.left - scrollPosition.left - start.x, 0);\n // Amount by which to push the overlay in each axis such that it remains on-screen.\n let pushX = 0;\n let pushY = 0;\n // If the overlay fits completely within the bounds of the viewport, push it from whichever\n // direction is goes off-screen. Otherwise, push the top-left corner such that its in the\n // viewport and allow for the trailing end of the overlay to go out of bounds.\n if (overlay.width <= viewport.width) {\n pushX = overflowLeft || -overflowRight;\n } else {\n pushX = start.x < this._viewportMargin ? viewport.left - scrollPosition.left - start.x : 0;\n }\n if (overlay.height <= viewport.height) {\n pushY = overflowTop || -overflowBottom;\n } else {\n pushY = start.y < this._viewportMargin ? viewport.top - scrollPosition.top - start.y : 0;\n }\n this._previousPushAmount = {\n x: pushX,\n y: pushY\n };\n return {\n x: start.x + pushX,\n y: start.y + pushY\n };\n }\n /**\n * Applies a computed position to the overlay and emits a position change.\n * @param position The position preference\n * @param originPoint The point on the origin element where the overlay is connected.\n */\n _applyPosition(position, originPoint) {\n this._setTransformOrigin(position);\n this._setOverlayElementStyles(originPoint, position);\n this._setBoundingBoxStyles(originPoint, position);\n if (position.panelClass) {\n this._addPanelClasses(position.panelClass);\n }\n // Notify that the position has been changed along with its change properties.\n // We only emit if we've got any subscriptions, because the scroll visibility\n // calculations can be somewhat expensive.\n if (this._positionChanges.observers.length) {\n const scrollVisibility = this._getScrollVisibility();\n // We're recalculating on scroll, but we only want to emit if anything\n // changed since downstream code might be hitting the `NgZone`.\n if (position !== this._lastPosition || !this._lastScrollVisibility || !compareScrollVisibility(this._lastScrollVisibility, scrollVisibility)) {\n const changeEvent = new ConnectedOverlayPositionChange(position, scrollVisibility);\n this._positionChanges.next(changeEvent);\n }\n this._lastScrollVisibility = scrollVisibility;\n }\n // Save the last connected position in case the position needs to be re-calculated.\n this._lastPosition = position;\n this._isInitialRender = false;\n }\n /** Sets the transform origin based on the configured selector and the passed-in position. */\n _setTransformOrigin(position) {\n if (!this._transformOriginSelector) {\n return;\n }\n const elements = this._boundingBox.querySelectorAll(this._transformOriginSelector);\n let xOrigin;\n let yOrigin = position.overlayY;\n if (position.overlayX === 'center') {\n xOrigin = 'center';\n } else if (this._isRtl()) {\n xOrigin = position.overlayX === 'start' ? 'right' : 'left';\n } else {\n xOrigin = position.overlayX === 'start' ? 'left' : 'right';\n }\n for (let i = 0; i < elements.length; i++) {\n elements[i].style.transformOrigin = `${xOrigin} ${yOrigin}`;\n }\n }\n /**\n * Gets the position and size of the overlay's sizing container.\n *\n * This method does no measuring and applies no styles so that we can cheaply compute the\n * bounds for all positions and choose the best fit based on these results.\n */\n _calculateBoundingBoxRect(origin, position) {\n const viewport = this._viewportRect;\n const isRtl = this._isRtl();\n let height, top, bottom;\n if (position.overlayY === 'top') {\n // Overlay is opening \"downward\" and thus is bound by the bottom viewport edge.\n top = origin.y;\n height = viewport.height - top + this._viewportMargin;\n } else if (position.overlayY === 'bottom') {\n // Overlay is opening \"upward\" and thus is bound by the top viewport edge. We need to add\n // the viewport margin back in, because the viewport rect is narrowed down to remove the\n // margin, whereas the `origin` position is calculated based on its `DOMRect`.\n bottom = viewport.height - origin.y + this._viewportMargin * 2;\n height = viewport.height - bottom + this._viewportMargin;\n } else {\n // If neither top nor bottom, it means that the overlay is vertically centered on the\n // origin point. Note that we want the position relative to the viewport, rather than\n // the page, which is why we don't use something like `viewport.bottom - origin.y` and\n // `origin.y - viewport.top`.\n const smallestDistanceToViewportEdge = Math.min(viewport.bottom - origin.y + viewport.top, origin.y);\n const previousHeight = this._lastBoundingBoxSize.height;\n height = smallestDistanceToViewportEdge * 2;\n top = origin.y - smallestDistanceToViewportEdge;\n if (height > previousHeight && !this._isInitialRender && !this._growAfterOpen) {\n top = origin.y - previousHeight / 2;\n }\n }\n // The overlay is opening 'right-ward' (the content flows to the right).\n const isBoundedByRightViewportEdge = position.overlayX === 'start' && !isRtl || position.overlayX === 'end' && isRtl;\n // The overlay is opening 'left-ward' (the content flows to the left).\n const isBoundedByLeftViewportEdge = position.overlayX === 'end' && !isRtl || position.overlayX === 'start' && isRtl;\n let width, left, right;\n if (isBoundedByLeftViewportEdge) {\n right = viewport.width - origin.x + this._viewportMargin * 2;\n width = origin.x - this._viewportMargin;\n } else if (isBoundedByRightViewportEdge) {\n left = origin.x;\n width = viewport.right - origin.x;\n } else {\n // If neither start nor end, it means that the overlay is horizontally centered on the\n // origin point. Note that we want the position relative to the viewport, rather than\n // the page, which is why we don't use something like `viewport.right - origin.x` and\n // `origin.x - viewport.left`.\n const smallestDistanceToViewportEdge = Math.min(viewport.right - origin.x + viewport.left, origin.x);\n const previousWidth = this._lastBoundingBoxSize.width;\n width = smallestDistanceToViewportEdge * 2;\n left = origin.x - smallestDistanceToViewportEdge;\n if (width > previousWidth && !this._isInitialRender && !this._growAfterOpen) {\n left = origin.x - previousWidth / 2;\n }\n }\n return {\n top: top,\n left: left,\n bottom: bottom,\n right: right,\n width,\n height\n };\n }\n /**\n * Sets the position and size of the overlay's sizing wrapper. The wrapper is positioned on the\n * origin's connection point and stretches to the bounds of the viewport.\n *\n * @param origin The point on the origin element where the overlay is connected.\n * @param position The position preference\n */\n _setBoundingBoxStyles(origin, position) {\n const boundingBoxRect = this._calculateBoundingBoxRect(origin, position);\n // It's weird if the overlay *grows* while scrolling, so we take the last size into account\n // when applying a new size.\n if (!this._isInitialRender && !this._growAfterOpen) {\n boundingBoxRect.height = Math.min(boundingBoxRect.height, this._lastBoundingBoxSize.height);\n boundingBoxRect.width = Math.min(boundingBoxRect.width, this._lastBoundingBoxSize.width);\n }\n const styles = {};\n if (this._hasExactPosition()) {\n styles.top = styles.left = '0';\n styles.bottom = styles.right = styles.maxHeight = styles.maxWidth = '';\n styles.width = styles.height = '100%';\n } else {\n const maxHeight = this._overlayRef.getConfig().maxHeight;\n const maxWidth = this._overlayRef.getConfig().maxWidth;\n styles.height = coerceCssPixelValue(boundingBoxRect.height);\n styles.top = coerceCssPixelValue(boundingBoxRect.top);\n styles.bottom = coerceCssPixelValue(boundingBoxRect.bottom);\n styles.width = coerceCssPixelValue(boundingBoxRect.width);\n styles.left = coerceCssPixelValue(boundingBoxRect.left);\n styles.right = coerceCssPixelValue(boundingBoxRect.right);\n // Push the pane content towards the proper direction.\n if (position.overlayX === 'center') {\n styles.alignItems = 'center';\n } else {\n styles.alignItems = position.overlayX === 'end' ? 'flex-end' : 'flex-start';\n }\n if (position.overlayY === 'center') {\n styles.justifyContent = 'center';\n } else {\n styles.justifyContent = position.overlayY === 'bottom' ? 'flex-end' : 'flex-start';\n }\n if (maxHeight) {\n styles.maxHeight = coerceCssPixelValue(maxHeight);\n }\n if (maxWidth) {\n styles.maxWidth = coerceCssPixelValue(maxWidth);\n }\n }\n this._lastBoundingBoxSize = boundingBoxRect;\n extendStyles(this._boundingBox.style, styles);\n }\n /** Resets the styles for the bounding box so that a new positioning can be computed. */\n _resetBoundingBoxStyles() {\n extendStyles(this._boundingBox.style, {\n top: '0',\n left: '0',\n right: '0',\n bottom: '0',\n height: '',\n width: '',\n alignItems: '',\n justifyContent: ''\n });\n }\n /** Resets the styles for the overlay pane so that a new positioning can be computed. */\n _resetOverlayElementStyles() {\n extendStyles(this._pane.style, {\n top: '',\n left: '',\n bottom: '',\n right: '',\n position: '',\n transform: ''\n });\n }\n /** Sets positioning styles to the overlay element. */\n _setOverlayElementStyles(originPoint, position) {\n const styles = {};\n const hasExactPosition = this._hasExactPosition();\n const hasFlexibleDimensions = this._hasFlexibleDimensions;\n const config = this._overlayRef.getConfig();\n if (hasExactPosition) {\n const scrollPosition = this._viewportRuler.getViewportScrollPosition();\n extendStyles(styles, this._getExactOverlayY(position, originPoint, scrollPosition));\n extendStyles(styles, this._getExactOverlayX(position, originPoint, scrollPosition));\n } else {\n styles.position = 'static';\n }\n // Use a transform to apply the offsets. We do this because the `center` positions rely on\n // being in the normal flex flow and setting a `top` / `left` at all will completely throw\n // off the position. We also can't use margins, because they won't have an effect in some\n // cases where the element doesn't have anything to \"push off of\". Finally, this works\n // better both with flexible and non-flexible positioning.\n let transformString = '';\n let offsetX = this._getOffset(position, 'x');\n let offsetY = this._getOffset(position, 'y');\n if (offsetX) {\n transformString += `translateX(${offsetX}px) `;\n }\n if (offsetY) {\n transformString += `translateY(${offsetY}px)`;\n }\n styles.transform = transformString.trim();\n // If a maxWidth or maxHeight is specified on the overlay, we remove them. We do this because\n // we need these values to both be set to \"100%\" for the automatic flexible sizing to work.\n // The maxHeight and maxWidth are set on the boundingBox in order to enforce the constraint.\n // Note that this doesn't apply when we have an exact position, in which case we do want to\n // apply them because they'll be cleared from the bounding box.\n if (config.maxHeight) {\n if (hasExactPosition) {\n styles.maxHeight = coerceCssPixelValue(config.maxHeight);\n } else if (hasFlexibleDimensions) {\n styles.maxHeight = '';\n }\n }\n if (config.maxWidth) {\n if (hasExactPosition) {\n styles.maxWidth = coerceCssPixelValue(config.maxWidth);\n } else if (hasFlexibleDimensions) {\n styles.maxWidth = '';\n }\n }\n extendStyles(this._pane.style, styles);\n }\n /** Gets the exact top/bottom for the overlay when not using flexible sizing or when pushing. */\n _getExactOverlayY(position, originPoint, scrollPosition) {\n // Reset any existing styles. This is necessary in case the\n // preferred position has changed since the last `apply`.\n let styles = {\n top: '',\n bottom: ''\n };\n let overlayPoint = this._getOverlayPoint(originPoint, this._overlayRect, position);\n if (this._isPushed) {\n overlayPoint = this._pushOverlayOnScreen(overlayPoint, this._overlayRect, scrollPosition);\n }\n // We want to set either `top` or `bottom` based on whether the overlay wants to appear\n // above or below the origin and the direction in which the element will expand.\n if (position.overlayY === 'bottom') {\n // When using `bottom`, we adjust the y position such that it is the distance\n // from the bottom of the viewport rather than the top.\n const documentHeight = this._document.documentElement.clientHeight;\n styles.bottom = `${documentHeight - (overlayPoint.y + this._overlayRect.height)}px`;\n } else {\n styles.top = coerceCssPixelValue(overlayPoint.y);\n }\n return styles;\n }\n /** Gets the exact left/right for the overlay when not using flexible sizing or when pushing. */\n _getExactOverlayX(position, originPoint, scrollPosition) {\n // Reset any existing styles. This is necessary in case the preferred position has\n // changed since the last `apply`.\n let styles = {\n left: '',\n right: ''\n };\n let overlayPoint = this._getOverlayPoint(originPoint, this._overlayRect, position);\n if (this._isPushed) {\n overlayPoint = this._pushOverlayOnScreen(overlayPoint, this._overlayRect, scrollPosition);\n }\n // We want to set either `left` or `right` based on whether the overlay wants to appear \"before\"\n // or \"after\" the origin, which determines the direction in which the element will expand.\n // For the horizontal axis, the meaning of \"before\" and \"after\" change based on whether the\n // page is in RTL or LTR.\n let horizontalStyleProperty;\n if (this._isRtl()) {\n horizontalStyleProperty = position.overlayX === 'end' ? 'left' : 'right';\n } else {\n horizontalStyleProperty = position.overlayX === 'end' ? 'right' : 'left';\n }\n // When we're setting `right`, we adjust the x position such that it is the distance\n // from the right edge of the viewport rather than the left edge.\n if (horizontalStyleProperty === 'right') {\n const documentWidth = this._document.documentElement.clientWidth;\n styles.right = `${documentWidth - (overlayPoint.x + this._overlayRect.width)}px`;\n } else {\n styles.left = coerceCssPixelValue(overlayPoint.x);\n }\n return styles;\n }\n /**\n * Gets the view properties of the trigger and overlay, including whether they are clipped\n * or completely outside the view of any of the strategy's scrollables.\n */\n _getScrollVisibility() {\n // Note: needs fresh rects since the position could've changed.\n const originBounds = this._getOriginRect();\n const overlayBounds = this._pane.getBoundingClientRect();\n // TODO(jelbourn): instead of needing all of the client rects for these scrolling containers\n // every time, we should be able to use the scrollTop of the containers if the size of those\n // containers hasn't changed.\n const scrollContainerBounds = this._scrollables.map(scrollable => {\n return scrollable.getElementRef().nativeElement.getBoundingClientRect();\n });\n return {\n isOriginClipped: isElementClippedByScrolling(originBounds, scrollContainerBounds),\n isOriginOutsideView: isElementScrolledOutsideView(originBounds, scrollContainerBounds),\n isOverlayClipped: isElementClippedByScrolling(overlayBounds, scrollContainerBounds),\n isOverlayOutsideView: isElementScrolledOutsideView(overlayBounds, scrollContainerBounds)\n };\n }\n /** Subtracts the amount that an element is overflowing on an axis from its length. */\n _subtractOverflows(length, ...overflows) {\n return overflows.reduce((currentValue, currentOverflow) => {\n return currentValue - Math.max(currentOverflow, 0);\n }, length);\n }\n /** Narrows the given viewport rect by the current _viewportMargin. */\n _getNarrowedViewportRect() {\n // We recalculate the viewport rect here ourselves, rather than using the ViewportRuler,\n // because we want to use the `clientWidth` and `clientHeight` as the base. The difference\n // being that the client properties don't include the scrollbar, as opposed to `innerWidth`\n // and `innerHeight` that do. This is necessary, because the overlay container uses\n // 100% `width` and `height` which don't include the scrollbar either.\n const width = this._document.documentElement.clientWidth;\n const height = this._document.documentElement.clientHeight;\n const scrollPosition = this._viewportRuler.getViewportScrollPosition();\n return {\n top: scrollPosition.top + this._viewportMargin,\n left: scrollPosition.left + this._viewportMargin,\n right: scrollPosition.left + width - this._viewportMargin,\n bottom: scrollPosition.top + height - this._viewportMargin,\n width: width - 2 * this._viewportMargin,\n height: height - 2 * this._viewportMargin\n };\n }\n /** Whether the we're dealing with an RTL context */\n _isRtl() {\n return this._overlayRef.getDirection() === 'rtl';\n }\n /** Determines whether the overlay uses exact or flexible positioning. */\n _hasExactPosition() {\n return !this._hasFlexibleDimensions || this._isPushed;\n }\n /** Retrieves the offset of a position along the x or y axis. */\n _getOffset(position, axis) {\n if (axis === 'x') {\n // We don't do something like `position['offset' + axis]` in\n // order to avoid breaking minifiers that rename properties.\n return position.offsetX == null ? this._offsetX : position.offsetX;\n }\n return position.offsetY == null ? this._offsetY : position.offsetY;\n }\n /** Validates that the current position match the expected values. */\n _validatePositions() {\n if (typeof ngDevMode === 'undefined' || ngDevMode) {\n if (!this._preferredPositions.length) {\n throw Error('FlexibleConnectedPositionStrategy: At least one position is required.');\n }\n // TODO(crisbeto): remove these once Angular's template type\n // checking is advanced enough to catch these cases.\n this._preferredPositions.forEach(pair => {\n validateHorizontalPosition('originX', pair.originX);\n validateVerticalPosition('originY', pair.originY);\n validateHorizontalPosition('overlayX', pair.overlayX);\n validateVerticalPosition('overlayY', pair.overlayY);\n });\n }\n }\n /** Adds a single CSS class or an array of classes on the overlay panel. */\n _addPanelClasses(cssClasses) {\n if (this._pane) {\n coerceArray(cssClasses).forEach(cssClass => {\n if (cssClass !== '' && this._appliedPanelClasses.indexOf(cssClass) === -1) {\n this._appliedPanelClasses.push(cssClass);\n this._pane.classList.add(cssClass);\n }\n });\n }\n }\n /** Clears the classes that the position strategy has applied from the overlay panel. */\n _clearPanelClasses() {\n if (this._pane) {\n this._appliedPanelClasses.forEach(cssClass => {\n this._pane.classList.remove(cssClass);\n });\n this._appliedPanelClasses = [];\n }\n }\n /** Returns the DOMRect 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 `DOMRect` 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 `DOMRect` 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/** Returns whether two `ScrollingVisibility` objects are identical. */\nfunction compareScrollVisibility(a, b) {\n if (a === b) {\n return true;\n }\n return a.isOriginClipped === b.isOriginClipped && a.isOriginOutsideView === b.isOriginOutsideView && a.isOverlayClipped === b.isOverlayClipped && a.isOverlayOutsideView === b.isOverlayOutsideView;\n}\nconst STANDARD_DROPDOWN_BELOW_POSITIONS = [{\n originX: 'start',\n originY: 'bottom',\n overlayX: 'start',\n overlayY: 'top'\n}, {\n originX: 'start',\n originY: 'top',\n overlayX: 'start',\n overlayY: 'bottom'\n}, {\n originX: 'end',\n originY: 'bottom',\n overlayX: 'end',\n overlayY: 'top'\n}, {\n originX: 'end',\n originY: 'top',\n overlayX: 'end',\n overlayY: 'bottom'\n}];\nconst STANDARD_DROPDOWN_ADJACENT_POSITIONS = [{\n originX: 'end',\n originY: 'top',\n overlayX: 'start',\n overlayY: 'top'\n}, {\n originX: 'end',\n originY: 'bottom',\n overlayX: 'start',\n overlayY: 'bottom'\n}, {\n originX: 'start',\n originY: 'top',\n overlayX: 'end',\n overlayY: 'top'\n}, {\n originX: 'start',\n originY: 'bottom',\n overlayX: 'end',\n overlayY: 'bottom'\n}];\n\n/** Class to be added to the overlay pane wrapper. */\nconst wrapperClass = 'cdk-global-overlay-wrapper';\n/**\n * A strategy for positioning overlays. Using this strategy, an overlay is given an\n * explicit position relative to the browser's viewport. We use flexbox, instead of\n * transforms, in order to avoid issues with subpixel rendering which can cause the\n * element to become blurry.\n */\nclass GlobalPositionStrategy {\n /** The overlay to which this strategy is attached. */\n _overlayRef;\n _cssPosition = 'static';\n _topOffset = '';\n _bottomOffset = '';\n _alignItems = '';\n _xPosition = '';\n _xOffset = '';\n _width = '';\n _height = '';\n _isDisposed = false;\n attach(overlayRef) {\n const config = overlayRef.getConfig();\n this._overlayRef = overlayRef;\n if (this._width && !config.width) {\n overlayRef.updateSize({\n width: this._width\n });\n }\n if (this._height && !config.height) {\n overlayRef.updateSize({\n height: this._height\n });\n }\n overlayRef.hostElement.classList.add(wrapperClass);\n this._isDisposed = false;\n }\n /**\n * Sets the top position of the overlay. Clears any previously set vertical position.\n * @param value New top offset.\n */\n top(value = '') {\n this._bottomOffset = '';\n this._topOffset = value;\n this._alignItems = 'flex-start';\n return this;\n }\n /**\n * Sets the left position of the overlay. Clears any previously set horizontal position.\n * @param value New left offset.\n */\n left(value = '') {\n this._xOffset = value;\n this._xPosition = 'left';\n return this;\n }\n /**\n * Sets the bottom position of the overlay. Clears any previously set vertical position.\n * @param value New bottom offset.\n */\n bottom(value = '') {\n this._topOffset = '';\n this._bottomOffset = value;\n this._alignItems = 'flex-end';\n return this;\n }\n /**\n * Sets the right position of the overlay. Clears any previously set horizontal position.\n * @param value New right offset.\n */\n right(value = '') {\n this._xOffset = value;\n this._xPosition = 'right';\n return this;\n }\n /**\n * Sets the overlay to the start of the viewport, depending on the overlay direction.\n * This will be to the left in LTR layouts and to the right in RTL.\n * @param offset Offset from the edge of the screen.\n */\n start(value = '') {\n this._xOffset = value;\n this._xPosition = 'start';\n return this;\n }\n /**\n * Sets the overlay to the end of the viewport, depending on the overlay direction.\n * This will be to the right in LTR layouts and to the left in RTL.\n * @param offset Offset from the edge of the screen.\n */\n end(value = '') {\n this._xOffset = value;\n this._xPosition = 'end';\n return this;\n }\n /**\n * Sets the overlay width and clears any previously set width.\n * @param value New width for the overlay\n * @deprecated Pass the `width` through the `OverlayConfig`.\n * @breaking-change 8.0.0\n */\n width(value = '') {\n if (this._overlayRef) {\n this._overlayRef.updateSize({\n width: value\n });\n } else {\n this._width = value;\n }\n return this;\n }\n /**\n * Sets the overlay height and clears any previously set height.\n * @param value New height for the overlay\n * @deprecated Pass the `height` through the `OverlayConfig`.\n * @breaking-change 8.0.0\n */\n height(value = '') {\n if (this._overlayRef) {\n this._overlayRef.updateSize({\n height: value\n });\n } else {\n this._height = value;\n }\n return this;\n }\n /**\n * Centers the overlay horizontally with an optional offset.\n * Clears any previously set horizontal position.\n *\n * @param offset Overlay offset from the horizontal center.\n */\n centerHorizontally(offset = '') {\n this.left(offset);\n this._xPosition = 'center';\n return this;\n }\n /**\n * Centers the overlay vertically with an optional offset.\n * Clears any previously set vertical position.\n *\n * @param offset Overlay offset from the vertical center.\n */\n centerVertically(offset = '') {\n this.top(offset);\n this._alignItems = 'center';\n return this;\n }\n /**\n * Apply the position to the element.\n * @docs-private\n */\n apply() {\n // Since the overlay ref applies the strategy asynchronously, it could\n // have been disposed before it ends up being applied. If that is the\n // case, we shouldn't do anything.\n if (!this._overlayRef || !this._overlayRef.hasAttached()) {\n return;\n }\n const styles = this._overlayRef.overlayElement.style;\n const parentStyles = this._overlayRef.hostElement.style;\n const config = this._overlayRef.getConfig();\n const {\n width,\n height,\n maxWidth,\n maxHeight\n } = config;\n const shouldBeFlushHorizontally = (width === '100%' || width === '100vw') && (!maxWidth || maxWidth === '100%' || maxWidth === '100vw');\n const shouldBeFlushVertically = (height === '100%' || height === '100vh') && (!maxHeight || maxHeight === '100%' || maxHeight === '100vh');\n const xPosition = this._xPosition;\n const xOffset = this._xOffset;\n const isRtl = this._overlayRef.getConfig().direction === 'rtl';\n let marginLeft = '';\n let marginRight = '';\n let justifyContent = '';\n if (shouldBeFlushHorizontally) {\n justifyContent = 'flex-start';\n } else if (xPosition === 'center') {\n justifyContent = 'center';\n if (isRtl) {\n marginRight = xOffset;\n } else {\n marginLeft = xOffset;\n }\n } else if (isRtl) {\n if (xPosition === 'left' || xPosition === 'end') {\n justifyContent = 'flex-end';\n marginLeft = xOffset;\n } else if (xPosition === 'right' || xPosition === 'start') {\n justifyContent = 'flex-start';\n marginRight = xOffset;\n }\n } else if (xPosition === 'left' || xPosition === 'start') {\n justifyContent = 'flex-start';\n marginLeft = xOffset;\n } else if (xPosition === 'right' || xPosition === 'end') {\n justifyContent = 'flex-end';\n marginRight = xOffset;\n }\n styles.position = this._cssPosition;\n styles.marginLeft = shouldBeFlushHorizontally ? '0' : marginLeft;\n styles.marginTop = shouldBeFlushVertically ? '0' : this._topOffset;\n styles.marginBottom = this._bottomOffset;\n styles.marginRight = shouldBeFlushHorizontally ? '0' : marginRight;\n parentStyles.justifyContent = justifyContent;\n parentStyles.alignItems = shouldBeFlushVertically ? 'flex-start' : this._alignItems;\n }\n /**\n * Cleans up the DOM changes from the position strategy.\n * @docs-private\n */\n dispose() {\n if (this._isDisposed || !this._overlayRef) {\n return;\n }\n const styles = this._overlayRef.overlayElement.style;\n const parent = this._overlayRef.hostElement;\n const parentStyles = parent.style;\n parent.classList.remove(wrapperClass);\n parentStyles.justifyContent = parentStyles.alignItems = styles.marginTop = styles.marginBottom = styles.marginLeft = styles.marginRight = styles.position = '';\n this._overlayRef = null;\n this._isDisposed = true;\n }\n}\n\n/** Builder for overlay position strategy. */\nlet OverlayPositionBuilder = /*#__PURE__*/(() => {\n class OverlayPositionBuilder {\n _viewportRuler = inject(ViewportRuler);\n _document = inject(DOCUMENT);\n _platform = inject(Platform);\n _overlayContainer = inject(OverlayContainer);\n constructor() {}\n /**\n * Creates a global position strategy.\n */\n global() {\n return new GlobalPositionStrategy();\n }\n /**\n * Creates a flexible position strategy.\n * @param origin Origin relative to which to position the overlay.\n */\n flexibleConnectedTo(origin) {\n return new FlexibleConnectedPositionStrategy(origin, this._viewportRuler, this._document, this._platform, this._overlayContainer);\n }\n static ɵfac = function OverlayPositionBuilder_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || OverlayPositionBuilder)();\n };\n static ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: OverlayPositionBuilder,\n factory: OverlayPositionBuilder.ɵfac,\n providedIn: 'root'\n });\n }\n return OverlayPositionBuilder;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n\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 */\nlet Overlay = /*#__PURE__*/(() => {\n class Overlay {\n scrollStrategies = inject(ScrollStrategyOptions);\n _overlayContainer = inject(OverlayContainer);\n _positionBuilder = inject(OverlayPositionBuilder);\n _keyboardDispatcher = inject(OverlayKeyboardDispatcher);\n _injector = inject(Injector);\n _ngZone = inject(NgZone);\n _document = inject(DOCUMENT);\n _directionality = inject(Directionality);\n _location = inject(Location);\n _outsideClickDispatcher = inject(OverlayOutsideClickDispatcher);\n _animationsModuleType = inject(ANIMATION_MODULE_TYPE, {\n optional: true\n });\n _idGenerator = inject(_IdGenerator);\n _renderer = inject(RendererFactory2).createRenderer(null, null);\n _appRef;\n _styleLoader = inject(_CdkPrivateStyleLoader);\n constructor() {}\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 // This is done in the overlay container as well, but we have it here\n // since it's common to mock out the overlay container in tests.\n this._styleLoader.load(_CdkOverlayStyleLoader);\n const host = this._createHostElement();\n const pane = this._createPaneElement(host);\n const portalOutlet = this._createPortalOutlet(pane);\n const overlayConfig = new OverlayConfig(config);\n overlayConfig.direction = overlayConfig.direction || this._directionality.value;\n return new OverlayRef(portalOutlet, host, pane, overlayConfig, this._ngZone, this._keyboardDispatcher, this._document, this._location, this._outsideClickDispatcher, this._animationsModuleType === 'NoopAnimations', this._injector.get(EnvironmentInjector), this._renderer);\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 = this._idGenerator.getId('cdk-overlay-');\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, null, this._appRef, this._injector, this._document);\n }\n static ɵfac = function Overlay_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || Overlay)();\n };\n static ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: Overlay,\n factory: Overlay.ɵfac,\n providedIn: 'root'\n });\n }\n return Overlay;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n\n/** Default set of positions for the overlay. Follows the behavior of a dropdown. */\nconst defaultPositionList = [{\n originX: 'start',\n originY: 'bottom',\n overlayX: 'start',\n overlayY: 'top'\n}, {\n originX: 'start',\n originY: 'top',\n overlayX: 'start',\n overlayY: 'bottom'\n}, {\n originX: 'end',\n originY: 'top',\n overlayX: 'end',\n overlayY: 'bottom'\n}, {\n originX: 'end',\n originY: 'bottom',\n overlayX: 'end',\n overlayY: 'top'\n}];\n/** Injection token that determines the scroll handling while the connected overlay is open. */\nconst CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY = /*#__PURE__*/new InjectionToken('cdk-connected-overlay-scroll-strategy', {\n providedIn: 'root',\n factory: () => {\n const overlay = inject(Overlay);\n return () => overlay.scrollStrategies.reposition();\n }\n});\n/**\n * Directive applied to an element to make it usable as an origin for an Overlay using a\n * ConnectedPositionStrategy.\n */\nlet CdkOverlayOrigin = /*#__PURE__*/(() => {\n class CdkOverlayOrigin {\n elementRef = inject(ElementRef);\n constructor() {}\n static ɵfac = function CdkOverlayOrigin_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || CdkOverlayOrigin)();\n };\n static ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkOverlayOrigin,\n selectors: [[\"\", \"cdk-overlay-origin\", \"\"], [\"\", \"overlay-origin\", \"\"], [\"\", \"cdkOverlayOrigin\", \"\"]],\n exportAs: [\"cdkOverlayOrigin\"]\n });\n }\n return CdkOverlayOrigin;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n/**\n * Directive to facilitate declarative creation of an\n * Overlay using a FlexibleConnectedPositionStrategy.\n */\nlet CdkConnectedOverlay = /*#__PURE__*/(() => {\n class CdkConnectedOverlay {\n _overlay = inject(Overlay);\n _dir = inject(Directionality, {\n optional: true\n });\n _overlayRef;\n _templatePortal;\n _backdropSubscription = Subscription.EMPTY;\n _attachSubscription = Subscription.EMPTY;\n _detachSubscription = Subscription.EMPTY;\n _positionSubscription = Subscription.EMPTY;\n _offsetX;\n _offsetY;\n _position;\n _scrollStrategyFactory = inject(CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY);\n _disposeOnNavigation = false;\n _ngZone = inject(NgZone);\n /** Origin for the connected overlay. */\n origin;\n /** Registered connected position pairs. */\n positions;\n /**\n * This input overrides the positions input if specified. It lets users pass\n * in arbitrary positioning strategies.\n */\n positionStrategy;\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 /** The width of the overlay panel. */\n width;\n /** The height of the overlay panel. */\n height;\n /** The min width of the overlay panel. */\n minWidth;\n /** The min height of the overlay panel. */\n minHeight;\n /** The custom class to be set on the backdrop element. */\n backdropClass;\n /** The custom class to add to the overlay pane element. */\n panelClass;\n /** Margin between the overlay and the viewport edges. */\n viewportMargin = 0;\n /** Strategy to be used when handling scroll events while the overlay is open. */\n scrollStrategy;\n /** Whether the overlay is open. */\n open = false;\n /** Whether the overlay can be closed by user interaction. */\n disableClose = false;\n /** CSS selector which to set the transform origin. */\n transformOriginSelector;\n /** Whether or not the overlay should attach a backdrop. */\n hasBackdrop = false;\n /** Whether or not the overlay should be locked when scrolling. */\n lockPosition = false;\n /** Whether the overlay's width and height can be constrained to fit within the viewport. */\n flexibleDimensions = false;\n /** Whether the overlay can grow after the initial open when flexible positioning is turned on. */\n growAfterOpen = false;\n /** Whether the overlay can be pushed on-screen if none of the provided positions fit. */\n push = false;\n /** Whether the overlay should be disposed of when the user goes backwards/forwards in history. */\n get disposeOnNavigation() {\n return this._disposeOnNavigation;\n }\n set disposeOnNavigation(value) {\n this._disposeOnNavigation = value;\n }\n /** Event emitted when the backdrop is clicked. */\n backdropClick = new EventEmitter();\n /** Event emitted when the position has changed. */\n positionChange = new EventEmitter();\n /** Event emitted when the overlay has been attached. */\n attach = new EventEmitter();\n /** Event emitted when the overlay has been detached. */\n detach = new EventEmitter();\n /** Emits when there are keyboard events that are targeted at the overlay. */\n overlayKeydown = new EventEmitter();\n /** Emits when there are mouse outside click events that are targeted at the overlay. */\n overlayOutsideClick = new EventEmitter();\n // TODO(jelbourn): inputs for size, scroll behavior, animation, etc.\n constructor() {\n const templateRef = inject(TemplateRef);\n const viewContainerRef = inject(ViewContainerRef);\n this._templatePortal = new TemplatePortal(templateRef, viewContainerRef);\n this.scrollStrategy = this._scrollStrategyFactory();\n }\n /** The associated overlay reference. */\n get overlayRef() {\n return this._overlayRef;\n }\n /** The element's layout direction. */\n get dir() {\n return this._dir ? this._dir.value : 'ltr';\n }\n ngOnDestroy() {\n this._attachSubscription.unsubscribe();\n this._detachSubscription.unsubscribe();\n this._backdropSubscription.unsubscribe();\n this._positionSubscription.unsubscribe();\n if (this._overlayRef) {\n this._overlayRef.dispose();\n }\n }\n ngOnChanges(changes) {\n if (this._position) {\n this._updatePositionStrategy(this._position);\n this._overlayRef.updateSize({\n width: this.width,\n minWidth: this.minWidth,\n height: this.height,\n minHeight: this.minHeight\n });\n if (changes['origin'] && this.open) {\n this._position.apply();\n }\n }\n if (changes['open']) {\n this.open ? this._attachOverlay() : this._detachOverlay();\n }\n }\n /** Creates an overlay */\n _createOverlay() {\n if (!this.positions || !this.positions.length) {\n this.positions = defaultPositionList;\n }\n const overlayRef = this._overlayRef = this._overlay.create(this._buildConfig());\n this._attachSubscription = overlayRef.attachments().subscribe(() => this.attach.emit());\n this._detachSubscription = overlayRef.detachments().subscribe(() => this.detach.emit());\n overlayRef.keydownEvents().subscribe(event => {\n this.overlayKeydown.next(event);\n if (event.keyCode === ESCAPE && !this.disableClose && !hasModifierKey(event)) {\n event.preventDefault();\n this._detachOverlay();\n }\n });\n this._overlayRef.outsidePointerEvents().subscribe(event => {\n const origin = this._getOriginElement();\n const target = _getEventTarget(event);\n if (!origin || origin !== target && !origin.contains(target)) {\n this.overlayOutsideClick.next(event);\n }\n });\n }\n /** Builds the overlay config based on the directive's inputs */\n _buildConfig() {\n const positionStrategy = this._position = this.positionStrategy || this._createPositionStrategy();\n const overlayConfig = new OverlayConfig({\n direction: this._dir || 'ltr',\n positionStrategy,\n scrollStrategy: this.scrollStrategy,\n hasBackdrop: this.hasBackdrop,\n disposeOnNavigation: this.disposeOnNavigation\n });\n if (this.width || this.width === 0) {\n overlayConfig.width = this.width;\n }\n if (this.height || this.height === 0) {\n overlayConfig.height = this.height;\n }\n if (this.minWidth || this.minWidth === 0) {\n overlayConfig.minWidth = this.minWidth;\n }\n if (this.minHeight || this.minHeight === 0) {\n overlayConfig.minHeight = this.minHeight;\n }\n if (this.backdropClass) {\n overlayConfig.backdropClass = this.backdropClass;\n }\n if (this.panelClass) {\n overlayConfig.panelClass = this.panelClass;\n }\n return overlayConfig;\n }\n /** Updates the state of a position strategy, based on the values of the directive inputs. */\n _updatePositionStrategy(positionStrategy) {\n const positions = this.positions.map(currentPosition => ({\n originX: currentPosition.originX,\n originY: currentPosition.originY,\n overlayX: currentPosition.overlayX,\n overlayY: currentPosition.overlayY,\n offsetX: currentPosition.offsetX || this.offsetX,\n offsetY: currentPosition.offsetY || this.offsetY,\n panelClass: currentPosition.panelClass || undefined\n }));\n return positionStrategy.setOrigin(this._getOrigin()).withPositions(positions).withFlexibleDimensions(this.flexibleDimensions).withPush(this.push).withGrowAfterOpen(this.growAfterOpen).withViewportMargin(this.viewportMargin).withLockedPosition(this.lockPosition).withTransformOriginOn(this.transformOriginSelector);\n }\n /** Returns the position strategy of the overlay to be set on the overlay config */\n _createPositionStrategy() {\n const strategy = this._overlay.position().flexibleConnectedTo(this._getOrigin());\n this._updatePositionStrategy(strategy);\n return strategy;\n }\n _getOrigin() {\n if (this.origin instanceof CdkOverlayOrigin) {\n return this.origin.elementRef;\n } else {\n return this.origin;\n }\n }\n _getOriginElement() {\n if (this.origin instanceof CdkOverlayOrigin) {\n return this.origin.elementRef.nativeElement;\n }\n if (this.origin instanceof ElementRef) {\n return this.origin.nativeElement;\n }\n if (typeof Element !== 'undefined' && this.origin instanceof Element) {\n return this.origin;\n }\n return null;\n }\n /** Attaches the overlay and subscribes to backdrop clicks if backdrop exists */\n _attachOverlay() {\n if (!this._overlayRef) {\n this._createOverlay();\n } else {\n // Update the overlay size, in case the directive's inputs have changed\n this._overlayRef.getConfig().hasBackdrop = this.hasBackdrop;\n }\n if (!this._overlayRef.hasAttached()) {\n this._overlayRef.attach(this._templatePortal);\n }\n if (this.hasBackdrop) {\n this._backdropSubscription = this._overlayRef.backdropClick().subscribe(event => {\n this.backdropClick.emit(event);\n });\n } else {\n this._backdropSubscription.unsubscribe();\n }\n this._positionSubscription.unsubscribe();\n // Only subscribe to `positionChanges` if requested, because putting\n // together all the information for it can be expensive.\n if (this.positionChange.observers.length > 0) {\n this._positionSubscription = this._position.positionChanges.pipe(takeWhile(() => this.positionChange.observers.length > 0)).subscribe(position => {\n this._ngZone.run(() => this.positionChange.emit(position));\n if (this.positionChange.observers.length === 0) {\n this._positionSubscription.unsubscribe();\n }\n });\n }\n }\n /** Detaches the overlay and unsubscribes to backdrop clicks if backdrop exists */\n _detachOverlay() {\n if (this._overlayRef) {\n this._overlayRef.detach();\n }\n this._backdropSubscription.unsubscribe();\n this._positionSubscription.unsubscribe();\n }\n static ɵfac = function CdkConnectedOverlay_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || CdkConnectedOverlay)();\n };\n static ɵdir = /* @__PURE__ */i0.ɵɵdefineDirective({\n type: CdkConnectedOverlay,\n selectors: [[\"\", \"cdk-connected-overlay\", \"\"], [\"\", \"connected-overlay\", \"\"], [\"\", \"cdkConnectedOverlay\", \"\"]],\n inputs: {\n origin: [0, \"cdkConnectedOverlayOrigin\", \"origin\"],\n positions: [0, \"cdkConnectedOverlayPositions\", \"positions\"],\n positionStrategy: [0, \"cdkConnectedOverlayPositionStrategy\", \"positionStrategy\"],\n offsetX: [0, \"cdkConnectedOverlayOffsetX\", \"offsetX\"],\n offsetY: [0, \"cdkConnectedOverlayOffsetY\", \"offsetY\"],\n width: [0, \"cdkConnectedOverlayWidth\", \"width\"],\n height: [0, \"cdkConnectedOverlayHeight\", \"height\"],\n minWidth: [0, \"cdkConnectedOverlayMinWidth\", \"minWidth\"],\n minHeight: [0, \"cdkConnectedOverlayMinHeight\", \"minHeight\"],\n backdropClass: [0, \"cdkConnectedOverlayBackdropClass\", \"backdropClass\"],\n panelClass: [0, \"cdkConnectedOverlayPanelClass\", \"panelClass\"],\n viewportMargin: [0, \"cdkConnectedOverlayViewportMargin\", \"viewportMargin\"],\n scrollStrategy: [0, \"cdkConnectedOverlayScrollStrategy\", \"scrollStrategy\"],\n open: [0, \"cdkConnectedOverlayOpen\", \"open\"],\n disableClose: [0, \"cdkConnectedOverlayDisableClose\", \"disableClose\"],\n transformOriginSelector: [0, \"cdkConnectedOverlayTransformOriginOn\", \"transformOriginSelector\"],\n hasBackdrop: [2, \"cdkConnectedOverlayHasBackdrop\", \"hasBackdrop\", booleanAttribute],\n lockPosition: [2, \"cdkConnectedOverlayLockPosition\", \"lockPosition\", booleanAttribute],\n flexibleDimensions: [2, \"cdkConnectedOverlayFlexibleDimensions\", \"flexibleDimensions\", booleanAttribute],\n growAfterOpen: [2, \"cdkConnectedOverlayGrowAfterOpen\", \"growAfterOpen\", booleanAttribute],\n push: [2, \"cdkConnectedOverlayPush\", \"push\", booleanAttribute],\n disposeOnNavigation: [2, \"cdkConnectedOverlayDisposeOnNavigation\", \"disposeOnNavigation\", booleanAttribute]\n },\n outputs: {\n backdropClick: \"backdropClick\",\n positionChange: \"positionChange\",\n attach: \"attach\",\n detach: \"detach\",\n overlayKeydown: \"overlayKeydown\",\n overlayOutsideClick: \"overlayOutsideClick\"\n },\n exportAs: [\"cdkConnectedOverlay\"],\n features: [i0.ɵɵInputTransformsFeature, i0.ɵɵNgOnChangesFeature]\n });\n }\n return CdkConnectedOverlay;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\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};\nlet OverlayModule = /*#__PURE__*/(() => {\n class OverlayModule {\n static ɵfac = function OverlayModule_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || OverlayModule)();\n };\n static ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: OverlayModule\n });\n static ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n providers: [Overlay, CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER],\n imports: [BidiModule, PortalModule, ScrollingModule, ScrollingModule]\n });\n }\n return OverlayModule;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n\n/**\n * Alternative to OverlayContainer that supports correct displaying of overlay elements in\n * Fullscreen mode\n * https://developer.mozilla.org/en-US/docs/Web/API/Element/requestFullScreen\n *\n * Should be provided in the root component.\n */\nlet FullscreenOverlayContainer = /*#__PURE__*/(() => {\n class FullscreenOverlayContainer extends OverlayContainer {\n _renderer = inject(RendererFactory2).createRenderer(null, null);\n _fullScreenEventName;\n _cleanupFullScreenListener;\n constructor() {\n super();\n }\n ngOnDestroy() {\n super.ngOnDestroy();\n this._cleanupFullScreenListener?.();\n }\n _createContainer() {\n const eventName = this._getEventName();\n super._createContainer();\n this._adjustParentForFullscreenChange();\n if (eventName) {\n this._cleanupFullScreenListener?.();\n this._cleanupFullScreenListener = this._renderer.listen('document', eventName, () => {\n this._adjustParentForFullscreenChange();\n });\n }\n }\n _adjustParentForFullscreenChange() {\n if (this._containerElement) {\n const fullscreenElement = this.getFullscreenElement();\n const parent = fullscreenElement || this._document.body;\n parent.appendChild(this._containerElement);\n }\n }\n _getEventName() {\n if (!this._fullScreenEventName) {\n const _document = this._document;\n if (_document.fullscreenEnabled) {\n this._fullScreenEventName = 'fullscreenchange';\n } else if (_document.webkitFullscreenEnabled) {\n this._fullScreenEventName = 'webkitfullscreenchange';\n } else if (_document.mozFullScreenEnabled) {\n this._fullScreenEventName = 'mozfullscreenchange';\n } else if (_document.msFullscreenEnabled) {\n this._fullScreenEventName = 'MSFullscreenChange';\n }\n }\n return this._fullScreenEventName;\n }\n /**\n * When the page is put into fullscreen mode, a specific element is specified.\n * Only that element and its children are visible when in fullscreen mode.\n */\n getFullscreenElement() {\n const _document = this._document;\n return _document.fullscreenElement || _document.webkitFullscreenElement || _document.mozFullScreenElement || _document.msFullscreenElement || null;\n }\n static ɵfac = function FullscreenOverlayContainer_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || FullscreenOverlayContainer)();\n };\n static ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: FullscreenOverlayContainer,\n factory: FullscreenOverlayContainer.ɵfac,\n providedIn: 'root'\n });\n }\n return FullscreenOverlayContainer;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { BlockScrollStrategy, CdkConnectedOverlay, CdkOverlayOrigin, CloseScrollStrategy, ConnectedOverlayPositionChange, ConnectionPositionPair, FlexibleConnectedPositionStrategy, FullscreenOverlayContainer, GlobalPositionStrategy, NoopScrollStrategy, Overlay, OverlayConfig, OverlayContainer, OverlayKeyboardDispatcher, OverlayModule, OverlayOutsideClickDispatcher, OverlayPositionBuilder, OverlayRef, RepositionScrollStrategy, STANDARD_DROPDOWN_ADJACENT_POSITIONS, STANDARD_DROPDOWN_BELOW_POSITIONS, ScrollStrategyOptions, ScrollingVisibility, validateHorizontalPosition, validateVerticalPosition };\n","import { FocusTrapFactory, InteractivityChecker, FocusMonitor, _IdGenerator, A11yModule } from '@angular/cdk/a11y';\nimport { OverlayRef, Overlay, OverlayContainer, OverlayConfig, OverlayModule } from '@angular/cdk/overlay';\nimport { Platform, _getFocusedElementPierceShadowDom } from '@angular/cdk/platform';\nimport { BasePortalOutlet, CdkPortalOutlet, ComponentPortal, TemplatePortal, PortalModule } from '@angular/cdk/portal';\nimport { DOCUMENT } from '@angular/common';\nimport * as i0 from '@angular/core';\nimport { inject, ElementRef, NgZone, Renderer2, ChangeDetectorRef, Injector, afterNextRender, Component, ViewEncapsulation, ChangeDetectionStrategy, ViewChild, InjectionToken, TemplateRef, Injectable, NgModule } from '@angular/core';\nimport { ESCAPE, hasModifierKey } from '@angular/cdk/keycodes';\nimport { Subject, defer, of } from 'rxjs';\nimport { Directionality } from '@angular/cdk/bidi';\nimport { startWith } from 'rxjs/operators';\n\n/** Configuration for opening a modal dialog. */\nfunction CdkDialogContainer_ng_template_0_Template(rf, ctx) {}\nclass DialogConfig {\n /**\n * Where the attached component should live in Angular's *logical* component tree.\n * This affects what is available for injection and the change detection order for the\n * component instantiated inside of the dialog. This does not affect where the dialog\n * content will be rendered.\n */\n viewContainerRef;\n /**\n * Injector used for the instantiation of the component to be attached. If provided,\n * takes precedence over the injector indirectly provided by `ViewContainerRef`.\n */\n injector;\n /** ID for the dialog. If omitted, a unique one will be generated. */\n id;\n /** The ARIA role of the dialog element. */\n role = 'dialog';\n /** Optional CSS class or classes applied to the overlay panel. */\n panelClass = '';\n /** Whether the dialog has a backdrop. */\n hasBackdrop = true;\n /** Optional CSS class or classes applied to the overlay backdrop. */\n backdropClass = '';\n /** Whether the dialog closes with the escape key or pointer events outside the panel element. */\n disableClose = false;\n /** Width of the dialog. */\n width = '';\n /** Height of the dialog. */\n height = '';\n /** Min-width of the dialog. If a number is provided, assumes pixel units. */\n minWidth;\n /** Min-height of the dialog. If a number is provided, assumes pixel units. */\n minHeight;\n /** Max-width of the dialog. If a number is provided, assumes pixel units. Defaults to 80vw. */\n maxWidth;\n /** Max-height of the dialog. If a number is provided, assumes pixel units. */\n maxHeight;\n /** Strategy to use when positioning the dialog. Defaults to centering it on the page. */\n positionStrategy;\n /** Data being injected into the child component. */\n data = null;\n /** Layout direction for the dialog's content. */\n direction;\n /** ID of the element that describes the dialog. */\n ariaDescribedBy = null;\n /** ID of the element that labels the dialog. */\n ariaLabelledBy = null;\n /** Dialog label applied via `aria-label` */\n ariaLabel = null;\n /**\n * Whether this is a modal dialog. Used to set the `aria-modal` attribute. Off by default,\n * because it can interfere with other overlay-based components (e.g. `mat-select`) and because\n * it is redundant since the dialog marks all outside content as `aria-hidden` anyway.\n */\n ariaModal = false;\n /**\n * Where the dialog should focus on open.\n * @breaking-change 14.0.0 Remove boolean option from autoFocus. Use string or\n * AutoFocusTarget instead.\n */\n autoFocus = 'first-tabbable';\n /**\n * Whether the dialog should restore focus to the previously-focused element upon closing.\n * Has the following behavior based on the type that is passed in:\n * - `boolean` - when true, will return focus to the element that was focused before the dialog\n * was opened, otherwise won't restore focus at all.\n * - `string` - focus will be restored to the first element that matches the CSS selector.\n * - `HTMLElement` - focus will be restored to the specific element.\n */\n restoreFocus = true;\n /**\n * Scroll strategy to be used for the dialog. This determines how\n * the dialog responds to scrolling underneath the panel element.\n */\n scrollStrategy;\n /**\n * Whether the dialog should close when the user navigates backwards or forwards through browser\n * history. This does not apply to navigation via anchor element unless using URL-hash based\n * routing (`HashLocationStrategy` in the Angular router).\n */\n closeOnNavigation = true;\n /**\n * Whether the dialog should close when the dialog service is destroyed. This is useful if\n * another service is wrapping the dialog and is managing the destruction instead.\n */\n closeOnDestroy = true;\n /**\n * Whether the dialog should close when the underlying overlay is detached. This is useful if\n * another service is wrapping the dialog and is managing the destruction instead. E.g. an\n * external detachment can happen as a result of a scroll strategy triggering it or when the\n * browser location changes.\n */\n closeOnOverlayDetachments = true;\n /**\n * Alternate `ComponentFactoryResolver` to use when resolving the associated component.\n * @deprecated No longer used. Will be removed.\n * @breaking-change 20.0.0\n */\n componentFactoryResolver;\n /**\n * Providers that will be exposed to the contents of the dialog. Can also\n * be provided as a function in order to generate the providers lazily.\n */\n providers;\n /**\n * Component into which the dialog content will be rendered. Defaults to `CdkDialogContainer`.\n * A configuration object can be passed in to customize the providers that will be exposed\n * to the dialog container.\n */\n container;\n /**\n * Context that will be passed to template-based dialogs.\n * A function can be passed in to resolve the context lazily.\n */\n templateContext;\n}\nfunction throwDialogContentAlreadyAttachedError() {\n throw Error('Attempting to attach dialog content after content is already attached');\n}\n/**\n * Internal component that wraps user-provided dialog content.\n * @docs-private\n */\nlet CdkDialogContainer = /*#__PURE__*/(() => {\n class CdkDialogContainer extends BasePortalOutlet {\n _elementRef = inject(ElementRef);\n _focusTrapFactory = inject(FocusTrapFactory);\n _config;\n _interactivityChecker = inject(InteractivityChecker);\n _ngZone = inject(NgZone);\n _overlayRef = inject(OverlayRef);\n _focusMonitor = inject(FocusMonitor);\n _renderer = inject(Renderer2);\n _platform = inject(Platform);\n _document = inject(DOCUMENT, {\n optional: true\n });\n /** The portal outlet inside of this container into which the dialog content will be loaded. */\n _portalOutlet;\n /** The class that traps and manages focus within the dialog. */\n _focusTrap = null;\n /** Element that was focused before the dialog was opened. Save this to restore upon close. */\n _elementFocusedBeforeDialogWasOpened = null;\n /**\n * Type of interaction that led to the dialog being closed. This is used to determine\n * whether the focus style will be applied when returning focus to its original location\n * after the dialog is closed.\n */\n _closeInteractionType = null;\n /**\n * Queue of the IDs of the dialog's label element, based on their definition order. The first\n * ID will be used as the `aria-labelledby` value. We use a queue here to handle the case\n * where there are two or more titles in the DOM at a time and the first one is destroyed while\n * the rest are present.\n */\n _ariaLabelledByQueue = [];\n _changeDetectorRef = inject(ChangeDetectorRef);\n _injector = inject(Injector);\n _isDestroyed = false;\n constructor() {\n super();\n // Callback is primarily for some internal tests\n // that were instantiating the dialog container manually.\n this._config = inject(DialogConfig, {\n optional: true\n }) || new DialogConfig();\n if (this._config.ariaLabelledBy) {\n this._ariaLabelledByQueue.push(this._config.ariaLabelledBy);\n }\n }\n _addAriaLabelledBy(id) {\n this._ariaLabelledByQueue.push(id);\n this._changeDetectorRef.markForCheck();\n }\n _removeAriaLabelledBy(id) {\n const index = this._ariaLabelledByQueue.indexOf(id);\n if (index > -1) {\n this._ariaLabelledByQueue.splice(index, 1);\n this._changeDetectorRef.markForCheck();\n }\n }\n _contentAttached() {\n this._initializeFocusTrap();\n this._handleBackdropClicks();\n this._captureInitialFocus();\n }\n /**\n * Can be used by child classes to customize the initial focus\n * capturing behavior (e.g. if it's tied to an animation).\n */\n _captureInitialFocus() {\n this._trapFocus();\n }\n ngOnDestroy() {\n this._isDestroyed = true;\n this._restoreFocus();\n }\n /**\n * Attach a ComponentPortal as content to this dialog container.\n * @param portal Portal to be attached as the dialog content.\n */\n attachComponentPortal(portal) {\n if (this._portalOutlet.hasAttached() && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throwDialogContentAlreadyAttachedError();\n }\n const result = this._portalOutlet.attachComponentPortal(portal);\n this._contentAttached();\n return result;\n }\n /**\n * Attach a TemplatePortal as content to this dialog container.\n * @param portal Portal to be attached as the dialog content.\n */\n attachTemplatePortal(portal) {\n if (this._portalOutlet.hasAttached() && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throwDialogContentAlreadyAttachedError();\n }\n const result = this._portalOutlet.attachTemplatePortal(portal);\n this._contentAttached();\n return result;\n }\n /**\n * Attaches a DOM portal to the dialog container.\n * @param portal Portal to be attached.\n * @deprecated To be turned into a method.\n * @breaking-change 10.0.0\n */\n attachDomPortal = portal => {\n if (this._portalOutlet.hasAttached() && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throwDialogContentAlreadyAttachedError();\n }\n const result = this._portalOutlet.attachDomPortal(portal);\n this._contentAttached();\n return result;\n };\n // TODO(crisbeto): this shouldn't be exposed, but there are internal references to it.\n /** Captures focus if it isn't already inside the dialog. */\n _recaptureFocus() {\n if (!this._containsFocus()) {\n this._trapFocus();\n }\n }\n /**\n * Focuses the provided element. If the element is not focusable, it will add a tabIndex\n * attribute to forcefully focus it. The attribute is removed after focus is moved.\n * @param element The element to focus.\n */\n _forceFocus(element, options) {\n if (!this._interactivityChecker.isFocusable(element)) {\n element.tabIndex = -1;\n // The tabindex attribute should be removed to avoid navigating to that element again\n this._ngZone.runOutsideAngular(() => {\n const callback = () => {\n deregisterBlur();\n deregisterMousedown();\n element.removeAttribute('tabindex');\n };\n const deregisterBlur = this._renderer.listen(element, 'blur', callback);\n const deregisterMousedown = this._renderer.listen(element, 'mousedown', callback);\n });\n }\n element.focus(options);\n }\n /**\n * Focuses the first element that matches the given selector within the focus trap.\n * @param selector The CSS selector for the element to set focus to.\n */\n _focusByCssSelector(selector, options) {\n let elementToFocus = this._elementRef.nativeElement.querySelector(selector);\n if (elementToFocus) {\n this._forceFocus(elementToFocus, options);\n }\n }\n /**\n * Moves the focus inside the focus trap. When autoFocus is not set to 'dialog', if focus\n * cannot be moved then focus will go to the dialog container.\n */\n _trapFocus() {\n if (this._isDestroyed) {\n return;\n }\n // If were to attempt to focus immediately, then the content of the dialog would not yet be\n // ready in instances where change detection has to run first. To deal with this, we simply\n // wait until after the next render.\n afterNextRender(() => {\n const element = this._elementRef.nativeElement;\n switch (this._config.autoFocus) {\n case false:\n case 'dialog':\n // Ensure that focus is on the dialog container. It's possible that a different\n // component tried to move focus while the open animation was running. See:\n // https://github.com/angular/components/issues/16215. Note that we only want to do this\n // if the focus isn't inside the dialog already, because it's possible that the consumer\n // turned off `autoFocus` in order to move focus themselves.\n if (!this._containsFocus()) {\n element.focus();\n }\n break;\n case true:\n case 'first-tabbable':\n const focusedSuccessfully = this._focusTrap?.focusInitialElement();\n // If we weren't able to find a focusable element in the dialog, then focus the dialog\n // container instead.\n if (!focusedSuccessfully) {\n this._focusDialogContainer();\n }\n break;\n case 'first-heading':\n this._focusByCssSelector('h1, h2, h3, h4, h5, h6, [role=\"heading\"]');\n break;\n default:\n this._focusByCssSelector(this._config.autoFocus);\n break;\n }\n }, {\n injector: this._injector\n });\n }\n /** Restores focus to the element that was focused before the dialog opened. */\n _restoreFocus() {\n const focusConfig = this._config.restoreFocus;\n let focusTargetElement = null;\n if (typeof focusConfig === 'string') {\n focusTargetElement = this._document.querySelector(focusConfig);\n } else if (typeof focusConfig === 'boolean') {\n focusTargetElement = focusConfig ? this._elementFocusedBeforeDialogWasOpened : null;\n } else if (focusConfig) {\n focusTargetElement = focusConfig;\n }\n // We need the extra check, because IE can set the `activeElement` to null in some cases.\n if (this._config.restoreFocus && focusTargetElement && typeof focusTargetElement.focus === 'function') {\n const activeElement = _getFocusedElementPierceShadowDom();\n const element = this._elementRef.nativeElement;\n // Make sure that focus is still inside the dialog or is on the body (usually because a\n // non-focusable element like the backdrop was clicked) before moving it. It's possible that\n // the consumer moved it themselves before the animation was done, in which case we shouldn't\n // do anything.\n if (!activeElement || activeElement === this._document.body || activeElement === element || element.contains(activeElement)) {\n if (this._focusMonitor) {\n this._focusMonitor.focusVia(focusTargetElement, this._closeInteractionType);\n this._closeInteractionType = null;\n } else {\n focusTargetElement.focus();\n }\n }\n }\n if (this._focusTrap) {\n this._focusTrap.destroy();\n }\n }\n /** Focuses the dialog container. */\n _focusDialogContainer() {\n // Note that there is no focus method when rendering on the server.\n if (this._elementRef.nativeElement.focus) {\n this._elementRef.nativeElement.focus();\n }\n }\n /** Returns whether focus is inside the dialog. */\n _containsFocus() {\n const element = this._elementRef.nativeElement;\n const activeElement = _getFocusedElementPierceShadowDom();\n return element === activeElement || element.contains(activeElement);\n }\n /** Sets up the focus trap. */\n _initializeFocusTrap() {\n if (this._platform.isBrowser) {\n this._focusTrap = this._focusTrapFactory.create(this._elementRef.nativeElement);\n // Save the previously focused element. This element will be re-focused\n // when the dialog closes.\n if (this._document) {\n this._elementFocusedBeforeDialogWasOpened = _getFocusedElementPierceShadowDom();\n }\n }\n }\n /** Sets up the listener that handles clicks on the dialog backdrop. */\n _handleBackdropClicks() {\n // Clicking on the backdrop will move focus out of dialog.\n // Recapture it if closing via the backdrop is disabled.\n this._overlayRef.backdropClick().subscribe(() => {\n if (this._config.disableClose) {\n this._recaptureFocus();\n }\n });\n }\n static ɵfac = function CdkDialogContainer_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || CdkDialogContainer)();\n };\n static ɵcmp = /* @__PURE__ */i0.ɵɵdefineComponent({\n type: CdkDialogContainer,\n selectors: [[\"cdk-dialog-container\"]],\n viewQuery: function CdkDialogContainer_Query(rf, ctx) {\n if (rf & 1) {\n i0.ɵɵviewQuery(CdkPortalOutlet, 7);\n }\n if (rf & 2) {\n let _t;\n i0.ɵɵqueryRefresh(_t = i0.ɵɵloadQuery()) && (ctx._portalOutlet = _t.first);\n }\n },\n hostAttrs: [\"tabindex\", \"-1\", 1, \"cdk-dialog-container\"],\n hostVars: 6,\n hostBindings: function CdkDialogContainer_HostBindings(rf, ctx) {\n if (rf & 2) {\n i0.ɵɵattribute(\"id\", ctx._config.id || null)(\"role\", ctx._config.role)(\"aria-modal\", ctx._config.ariaModal)(\"aria-labelledby\", ctx._config.ariaLabel ? null : ctx._ariaLabelledByQueue[0])(\"aria-label\", ctx._config.ariaLabel)(\"aria-describedby\", ctx._config.ariaDescribedBy || null);\n }\n },\n features: [i0.ɵɵInheritDefinitionFeature],\n decls: 1,\n vars: 0,\n consts: [[\"cdkPortalOutlet\", \"\"]],\n template: function CdkDialogContainer_Template(rf, ctx) {\n if (rf & 1) {\n i0.ɵɵtemplate(0, CdkDialogContainer_ng_template_0_Template, 0, 0, \"ng-template\", 0);\n }\n },\n dependencies: [CdkPortalOutlet],\n styles: [\".cdk-dialog-container{display:block;width:100%;height:100%;min-height:inherit;max-height:inherit}\"],\n encapsulation: 2\n });\n }\n return CdkDialogContainer;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n\n/**\n * Reference to a dialog opened via the Dialog service.\n */\nclass DialogRef {\n overlayRef;\n config;\n /**\n * Instance of component opened into the dialog. Will be\n * null when the dialog is opened using a `TemplateRef`.\n */\n componentInstance;\n /**\n * `ComponentRef` of the component opened into the dialog. Will be\n * null when the dialog is opened using a `TemplateRef`.\n */\n componentRef;\n /** Instance of the container that is rendering out the dialog content. */\n containerInstance;\n /** Whether the user is allowed to close the dialog. */\n disableClose;\n /** Emits when the dialog has been closed. */\n closed = /*#__PURE__*/new Subject();\n /** Emits when the backdrop of the dialog is clicked. */\n backdropClick;\n /** Emits when on keyboard events within the dialog. */\n keydownEvents;\n /** Emits on pointer events that happen outside of the dialog. */\n outsidePointerEvents;\n /** Unique ID for the dialog. */\n id;\n /** Subscription to external detachments of the dialog. */\n _detachSubscription;\n constructor(overlayRef, config) {\n this.overlayRef = overlayRef;\n this.config = config;\n this.disableClose = config.disableClose;\n this.backdropClick = overlayRef.backdropClick();\n this.keydownEvents = overlayRef.keydownEvents();\n this.outsidePointerEvents = overlayRef.outsidePointerEvents();\n this.id = config.id; // By the time the dialog is created we are guaranteed to have an ID.\n this.keydownEvents.subscribe(event => {\n if (event.keyCode === ESCAPE && !this.disableClose && !hasModifierKey(event)) {\n event.preventDefault();\n this.close(undefined, {\n focusOrigin: 'keyboard'\n });\n }\n });\n this.backdropClick.subscribe(() => {\n if (!this.disableClose) {\n this.close(undefined, {\n focusOrigin: 'mouse'\n });\n }\n });\n this._detachSubscription = overlayRef.detachments().subscribe(() => {\n // Check specifically for `false`, because we want `undefined` to be treated like `true`.\n if (config.closeOnOverlayDetachments !== false) {\n this.close();\n }\n });\n }\n /**\n * Close the dialog.\n * @param result Optional result to return to the dialog opener.\n * @param options Additional options to customize the closing behavior.\n */\n close(result, options) {\n if (this.containerInstance) {\n const closedSubject = this.closed;\n this.containerInstance._closeInteractionType = options?.focusOrigin || 'program';\n // Drop the detach subscription first since it can be triggered by the\n // `dispose` call and override the result of this closing sequence.\n this._detachSubscription.unsubscribe();\n this.overlayRef.dispose();\n closedSubject.next(result);\n closedSubject.complete();\n this.componentInstance = this.containerInstance = null;\n }\n }\n /** Updates the position of the dialog based on the current position strategy. */\n updatePosition() {\n this.overlayRef.updatePosition();\n return this;\n }\n /**\n * Updates the dialog's width and height.\n * @param width New width of the dialog.\n * @param height New height of the dialog.\n */\n updateSize(width = '', height = '') {\n this.overlayRef.updateSize({\n width,\n height\n });\n return this;\n }\n /** Add a CSS class or an array of classes to the overlay pane. */\n addPanelClass(classes) {\n this.overlayRef.addPanelClass(classes);\n return this;\n }\n /** Remove a CSS class or an array of classes from the overlay pane. */\n removePanelClass(classes) {\n this.overlayRef.removePanelClass(classes);\n return this;\n }\n}\n\n/** Injection token for the Dialog's ScrollStrategy. */\nconst DIALOG_SCROLL_STRATEGY = /*#__PURE__*/new InjectionToken('DialogScrollStrategy', {\n providedIn: 'root',\n factory: () => {\n const overlay = inject(Overlay);\n return () => overlay.scrollStrategies.block();\n }\n});\n/** Injection token for the Dialog's Data. */\nconst DIALOG_DATA = /*#__PURE__*/new InjectionToken('DialogData');\n/** Injection token that can be used to provide default options for the dialog module. */\nconst DEFAULT_DIALOG_CONFIG = /*#__PURE__*/new InjectionToken('DefaultDialogConfig');\n/**\n * @docs-private\n * @deprecated No longer used. To be removed.\n * @breaking-change 19.0.0\n */\nfunction DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay) {\n return () => overlay.scrollStrategies.block();\n}\n/**\n * @docs-private\n * @deprecated No longer used. To be removed.\n * @breaking-change 19.0.0\n */\nconst DIALOG_SCROLL_STRATEGY_PROVIDER = {\n provide: DIALOG_SCROLL_STRATEGY,\n deps: [Overlay],\n useFactory: DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY\n};\nlet Dialog = /*#__PURE__*/(() => {\n class Dialog {\n _overlay = inject(Overlay);\n _injector = inject(Injector);\n _defaultOptions = inject(DEFAULT_DIALOG_CONFIG, {\n optional: true\n });\n _parentDialog = inject(Dialog, {\n optional: true,\n skipSelf: true\n });\n _overlayContainer = inject(OverlayContainer);\n _idGenerator = inject(_IdGenerator);\n _openDialogsAtThisLevel = [];\n _afterAllClosedAtThisLevel = new Subject();\n _afterOpenedAtThisLevel = new Subject();\n _ariaHiddenElements = new Map();\n _scrollStrategy = inject(DIALOG_SCROLL_STRATEGY);\n /** Keeps track of the currently-open dialogs. */\n get openDialogs() {\n return this._parentDialog ? this._parentDialog.openDialogs : this._openDialogsAtThisLevel;\n }\n /** Stream that emits when a dialog has been opened. */\n get afterOpened() {\n return this._parentDialog ? this._parentDialog.afterOpened : this._afterOpenedAtThisLevel;\n }\n /**\n * Stream that emits when all open dialog have finished closing.\n * Will emit on subscribe if there are no open dialogs to begin with.\n */\n afterAllClosed = defer(() => this.openDialogs.length ? this._getAfterAllClosed() : this._getAfterAllClosed().pipe(startWith(undefined)));\n constructor() {}\n open(componentOrTemplateRef, config) {\n const defaults = this._defaultOptions || new DialogConfig();\n config = {\n ...defaults,\n ...config\n };\n config.id = config.id || this._idGenerator.getId('cdk-dialog-');\n if (config.id && this.getDialogById(config.id) && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n throw Error(`Dialog with id \"${config.id}\" exists already. The dialog id must be unique.`);\n }\n const overlayConfig = this._getOverlayConfig(config);\n const overlayRef = this._overlay.create(overlayConfig);\n const dialogRef = new DialogRef(overlayRef, config);\n const dialogContainer = this._attachContainer(overlayRef, dialogRef, config);\n dialogRef.containerInstance = dialogContainer;\n this._attachDialogContent(componentOrTemplateRef, dialogRef, dialogContainer, config);\n // If this is the first dialog that we're opening, hide all the non-overlay content.\n if (!this.openDialogs.length) {\n this._hideNonDialogContentFromAssistiveTechnology();\n }\n this.openDialogs.push(dialogRef);\n dialogRef.closed.subscribe(() => this._removeOpenDialog(dialogRef, true));\n this.afterOpened.next(dialogRef);\n return dialogRef;\n }\n /**\n * Closes all of the currently-open dialogs.\n */\n closeAll() {\n reverseForEach(this.openDialogs, dialog => dialog.close());\n }\n /**\n * Finds an open dialog by its id.\n * @param id ID to use when looking up the dialog.\n */\n getDialogById(id) {\n return this.openDialogs.find(dialog => dialog.id === id);\n }\n ngOnDestroy() {\n // Make one pass over all the dialogs that need to be untracked, but should not be closed. We\n // want to stop tracking the open dialog even if it hasn't been closed, because the tracking\n // determines when `aria-hidden` is removed from elements outside the dialog.\n reverseForEach(this._openDialogsAtThisLevel, dialog => {\n // Check for `false` specifically since we want `undefined` to be interpreted as `true`.\n if (dialog.config.closeOnDestroy === false) {\n this._removeOpenDialog(dialog, false);\n }\n });\n // Make a second pass and close the remaining dialogs. We do this second pass in order to\n // correctly dispatch the `afterAllClosed` event in case we have a mixed array of dialogs\n // that should be closed and dialogs that should not.\n reverseForEach(this._openDialogsAtThisLevel, dialog => dialog.close());\n this._afterAllClosedAtThisLevel.complete();\n this._afterOpenedAtThisLevel.complete();\n this._openDialogsAtThisLevel = [];\n }\n /**\n * Creates an overlay config from a dialog config.\n * @param config The dialog configuration.\n * @returns The overlay configuration.\n */\n _getOverlayConfig(config) {\n const state = new OverlayConfig({\n positionStrategy: config.positionStrategy || this._overlay.position().global().centerHorizontally().centerVertically(),\n scrollStrategy: config.scrollStrategy || this._scrollStrategy(),\n panelClass: config.panelClass,\n hasBackdrop: config.hasBackdrop,\n direction: config.direction,\n minWidth: config.minWidth,\n minHeight: config.minHeight,\n maxWidth: config.maxWidth,\n maxHeight: config.maxHeight,\n width: config.width,\n height: config.height,\n disposeOnNavigation: config.closeOnNavigation\n });\n if (config.backdropClass) {\n state.backdropClass = config.backdropClass;\n }\n return state;\n }\n /**\n * Attaches a dialog container to a dialog's already-created overlay.\n * @param overlay Reference to the dialog's underlying overlay.\n * @param config The dialog configuration.\n * @returns A promise resolving to a ComponentRef for the attached container.\n */\n _attachContainer(overlay, dialogRef, config) {\n const userInjector = config.injector || config.viewContainerRef?.injector;\n const providers = [{\n provide: DialogConfig,\n useValue: config\n }, {\n provide: DialogRef,\n useValue: dialogRef\n }, {\n provide: OverlayRef,\n useValue: overlay\n }];\n let containerType;\n if (config.container) {\n if (typeof config.container === 'function') {\n containerType = config.container;\n } else {\n containerType = config.container.type;\n providers.push(...config.container.providers(config));\n }\n } else {\n containerType = CdkDialogContainer;\n }\n const containerPortal = new ComponentPortal(containerType, config.viewContainerRef, Injector.create({\n parent: userInjector || this._injector,\n providers\n }));\n const containerRef = overlay.attach(containerPortal);\n return containerRef.instance;\n }\n /**\n * Attaches the user-provided component to the already-created dialog container.\n * @param componentOrTemplateRef The type of component being loaded into the dialog,\n * or a TemplateRef to instantiate as the content.\n * @param dialogRef Reference to the dialog being opened.\n * @param dialogContainer Component that is going to wrap the dialog content.\n * @param config Configuration used to open the dialog.\n */\n _attachDialogContent(componentOrTemplateRef, dialogRef, dialogContainer, config) {\n if (componentOrTemplateRef instanceof TemplateRef) {\n const injector = this._createInjector(config, dialogRef, dialogContainer, undefined);\n let context = {\n $implicit: config.data,\n dialogRef\n };\n if (config.templateContext) {\n context = {\n ...context,\n ...(typeof config.templateContext === 'function' ? config.templateContext() : config.templateContext)\n };\n }\n dialogContainer.attachTemplatePortal(new TemplatePortal(componentOrTemplateRef, null, context, injector));\n } else {\n const injector = this._createInjector(config, dialogRef, dialogContainer, this._injector);\n const contentRef = dialogContainer.attachComponentPortal(new ComponentPortal(componentOrTemplateRef, config.viewContainerRef, injector));\n dialogRef.componentRef = contentRef;\n dialogRef.componentInstance = contentRef.instance;\n }\n }\n /**\n * Creates a custom injector to be used inside the dialog. This allows a component loaded inside\n * of a dialog to close itself and, optionally, to return a value.\n * @param config Config object that is used to construct the dialog.\n * @param dialogRef Reference to the dialog being opened.\n * @param dialogContainer Component that is going to wrap the dialog content.\n * @param fallbackInjector Injector to use as a fallback when a lookup fails in the custom\n * dialog injector, if the user didn't provide a custom one.\n * @returns The custom injector that can be used inside the dialog.\n */\n _createInjector(config, dialogRef, dialogContainer, fallbackInjector) {\n const userInjector = config.injector || config.viewContainerRef?.injector;\n const providers = [{\n provide: DIALOG_DATA,\n useValue: config.data\n }, {\n provide: DialogRef,\n useValue: dialogRef\n }];\n if (config.providers) {\n if (typeof config.providers === 'function') {\n providers.push(...config.providers(dialogRef, config, dialogContainer));\n } else {\n providers.push(...config.providers);\n }\n }\n if (config.direction && (!userInjector || !userInjector.get(Directionality, null, {\n optional: true\n }))) {\n providers.push({\n provide: Directionality,\n useValue: {\n value: config.direction,\n change: of()\n }\n });\n }\n return Injector.create({\n parent: userInjector || fallbackInjector,\n providers\n });\n }\n /**\n * Removes a dialog from the array of open dialogs.\n * @param dialogRef Dialog to be removed.\n * @param emitEvent Whether to emit an event if this is the last dialog.\n */\n _removeOpenDialog(dialogRef, emitEvent) {\n const index = this.openDialogs.indexOf(dialogRef);\n if (index > -1) {\n this.openDialogs.splice(index, 1);\n // If all the dialogs were closed, remove/restore the `aria-hidden`\n // to a the siblings and emit to the `afterAllClosed` stream.\n if (!this.openDialogs.length) {\n this._ariaHiddenElements.forEach((previousValue, element) => {\n if (previousValue) {\n element.setAttribute('aria-hidden', previousValue);\n } else {\n element.removeAttribute('aria-hidden');\n }\n });\n this._ariaHiddenElements.clear();\n if (emitEvent) {\n this._getAfterAllClosed().next();\n }\n }\n }\n }\n /** Hides all of the content that isn't an overlay from assistive technology. */\n _hideNonDialogContentFromAssistiveTechnology() {\n const overlayContainer = this._overlayContainer.getContainerElement();\n // Ensure that the overlay container is attached to the DOM.\n if (overlayContainer.parentElement) {\n const siblings = overlayContainer.parentElement.children;\n for (let i = siblings.length - 1; i > -1; i--) {\n const sibling = siblings[i];\n if (sibling !== overlayContainer && sibling.nodeName !== 'SCRIPT' && sibling.nodeName !== 'STYLE' && !sibling.hasAttribute('aria-live')) {\n this._ariaHiddenElements.set(sibling, sibling.getAttribute('aria-hidden'));\n sibling.setAttribute('aria-hidden', 'true');\n }\n }\n }\n }\n _getAfterAllClosed() {\n const parent = this._parentDialog;\n return parent ? parent._getAfterAllClosed() : this._afterAllClosedAtThisLevel;\n }\n static ɵfac = function Dialog_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || Dialog)();\n };\n static ɵprov = /* @__PURE__ */i0.ɵɵdefineInjectable({\n token: Dialog,\n factory: Dialog.ɵfac,\n providedIn: 'root'\n });\n }\n return Dialog;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n/**\n * Executes a callback against all elements in an array while iterating in reverse.\n * Useful if the array is being modified as it is being iterated.\n */\nfunction reverseForEach(items, callback) {\n let i = items.length;\n while (i--) {\n callback(items[i]);\n }\n}\nlet DialogModule = /*#__PURE__*/(() => {\n class DialogModule {\n static ɵfac = function DialogModule_Factory(__ngFactoryType__) {\n return new (__ngFactoryType__ || DialogModule)();\n };\n static ɵmod = /* @__PURE__ */i0.ɵɵdefineNgModule({\n type: DialogModule\n });\n static ɵinj = /* @__PURE__ */i0.ɵɵdefineInjector({\n providers: [Dialog],\n imports: [OverlayModule, PortalModule, A11yModule,\n // Re-export the PortalModule so that people extending the `CdkDialogContainer`\n // don't have to remember to import it or be faced with an unhelpful error.\n PortalModule]\n });\n }\n return DialogModule;\n})();\n/*#__PURE__*/(() => {\n (typeof ngDevMode === \"undefined\" || ngDevMode) && void 0;\n})();\n\n/**\n * Generated bundle index. Do not edit.\n */\n\nexport { CdkDialogContainer, DEFAULT_DIALOG_CONFIG, DIALOG_DATA, DIALOG_SCROLL_STRATEGY, DIALOG_SCROLL_STRATEGY_PROVIDER, DIALOG_SCROLL_STRATEGY_PROVIDER_FACTORY, Dialog, DialogConfig, DialogModule, DialogRef, throwDialogContentAlreadyAttachedError };\n","import {\n animate,\n AnimationEvent,\n keyframes,\n state,\n style,\n transition,\n trigger,\n} from '@angular/animations';\nimport { DialogRef } from '@angular/cdk/dialog';\nimport { Component, inject } from '@angular/core';\n\n@Component({\n selector: 'v-dialog-wrapper',\n templateUrl: './wrapper.component.html',\n animations: [\n trigger('dialogBackdropAnimation', [\n state('void', style({ opacity: 0 })),\n state('*', style({ opacity: 0.4 })),\n transition('void => *', animate('175ms ease-out')),\n transition('* => void', animate('125ms ease-in')),\n ]),\n trigger('dialogContainerAnimation', [\n transition('void => *', [\n animate(\n '250ms ease-out',\n keyframes([\n style({ transform: 'scale(0.75)', opacity: 0, offset: 0 }),\n style({ transform: 'scale(1.1)', opacity: 1, offset: 0.6 }),\n style({ transform: 'scale(1)', opacity: 1, offset: 1 }),\n ])\n ),\n ]),\n transition('* => void', [\n animate(\n '125ms ease-in',\n keyframes([\n style({ transform: 'scale(1)', opacity: 1, offset: 0 }),\n style({ transform: 'scale(0.75)', opacity: 0, offset: 1 }),\n ])\n ),\n ]),\n ]),\n ],\n})\nexport class VDialogWrapperComponent {\n private dialogRef = inject(DialogRef);\n isVisible = true;\n private result: any;\n\n animationDone(event: AnimationEvent) {\n if (event.toState === 'void' && event.phaseName === 'done') {\n this.dialogRef.close(this.result);\n }\n }\n\n close(result: any) {\n this.result = result;\n this.isVisible = false;\n }\n}\n","
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