http://git-wip-us.apache.org/repos/asf/nifi-fds/blob/eec354e6/node_modules/@angular/cdk/esm2015/overlay.js.map ---------------------------------------------------------------------- diff --git a/node_modules/@angular/cdk/esm2015/overlay.js.map b/node_modules/@angular/cdk/esm2015/overlay.js.map new file mode 100644 index 0000000..c6d2aed --- /dev/null +++ b/node_modules/@angular/cdk/esm2015/overlay.js.map @@ -0,0 +1 @@ +{"version":3,"file":"overlay.js","sources":["../../../src/cdk/overlay/index.ts","../../../src/cdk/overlay/public-api.ts","../../../src/cdk/overlay/fullscreen-overlay-container.ts","../../../src/cdk/overlay/overlay-module.ts","../../../src/cdk/overlay/overlay-directives.ts","../../../src/cdk/overlay/overlay.ts","../../../src/cdk/overlay/overlay-container.ts","../../../src/cdk/overlay/keyboard/overlay-keyboard-dispatcher.ts","../../../src/cdk/overlay/position/overlay-position-builder.ts","../../../src/cdk/overlay/position/global-position-strategy.ts","../../../src/cdk/overlay/position/connected-position-strategy.ts","../../../src/cdk/overlay/overlay-ref.ts","../../../src/cdk/overlay/scroll/index.ts","../../../src/cdk/overlay/scroll/scroll-strategy-options.ts","../../../src/cdk/overlay/scroll/reposition-scroll-strategy.ts","../../../src/cdk/overlay/position/scroll-clip.ts","../../../src/cdk/overlay/scroll/block-scroll-strategy.ts","../../../src/cdk/overlay/scroll/close-scroll-strategy. ts","../../../src/cdk/overlay/scroll/scroll-strategy.ts","../../../src/cdk/overlay/position/connected-position.ts","../../../src/cdk/overlay/overlay-config.ts","../../../src/cdk/overlay/scroll/noop-scroll-strategy.ts"],"sourcesContent":["/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from './public-api';\n\nexport {OVERLAY_KEYBOARD_DISPATCHER_PROVIDER as ɵg,OVERLAY_KEYBOARD_DISPATCHER_PROVIDER_FACTORY as ɵf} from './keyboard/overlay-keyboard-dispatcher';\nexport {OVERLAY_CONTAINER_PROVIDER as ɵb,OVERLAY_CONTAINER_PROVIDER_FACTORY as ɵa} from './overlay-container';\nexport {CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY as ɵc,CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER as ɵe,CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY as ɵd} from './overlay-directives';","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport * from './overlay-config';\nexport * from './position/connected-position';\nexport * from './scroll/index';\nexport * from './overlay-module';\nexport {Overlay} from './overlay';\nexport {OverlayContainer} from './overlay-container';\nexport {CdkOverlayOrigin, CdkConnectedOverlay} from './overlay-directives';\nexport {FullscreenOverlayContainer} from './fullscreen-overlay-container';\nexport {OverlayRef, OverlaySizeConfig} from './overlay-ref';\nexport {ViewportRuler} from '@angular/cdk/scrolling';\nexport {ComponentType} from '@angular/cdk/portal';\nexport {OverlayKeyboardDispatcher} from './keyboard/overlay-keyboard-dispatcher';\nexport {OverlayPositionBuilder} from './position/overlay-position-builder';\n\n// Export pre-defined position strategies and interface to build custom ones.\nexport {PositionStrategy} from './position/position-strategy';\nexport {GlobalPositionStrategy} from './position/global-position-strategy';\nexport {ConnectedPositionStrategy} from './po sition/connected-position-strategy';\nexport {VIEWPORT_RULER_PROVIDER} from '@angular/cdk/scrolling';\n\n/**\n * @deprecated Use CdkConnectedOverlay\n * @deletion-target 6.0.0\n */\nexport {CdkConnectedOverlay as ConnectedOverlayDirective} from './overlay-directives';\n\n/**\n * @deprecated Use CdkOverlayOrigin\n * @deletion-target 6.0.0\n */\nexport {CdkOverlayOrigin as OverlayOrigin} from './overlay-directives';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\nimport {OverlayContainer} from './overlay-container';\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 */\n@Injectable() \nexport class FullscreenOverlayContainer extends OverlayContainer {\n protected _createContainer(): void {\n super._createContainer();\n this._adjustParentForFullscreenChange();\n this._addFullscreenChangeListener(() => this._adjustParentForFullscreenChange());\n }\n\n private _adjustParentForFullscreenChange(): void {\n if (!this._containerElement) {\n return;\n }\n let fullscreenElement = this.getFullscreenElement();\n let parent = fullscreenElement || document.body;\n parent.appendChild(this._containerElement);\n }\n\n private _addFullscreenChangeListener(fn: () => void) {\n if (document.fullscreenEnabled) {\n document.addEventListener('fullscreenchange', fn);\n } else if (document.webkitFullscreenEnabled) {\n document.addEventListener('webkitfullscreenchange', fn);\n } else if ((document as any).mozFullScreenEnabled) {\n document.addEventListener('mozfullscreenchange', fn);\n } else if ((document as any).msFullscreenE nabled) {\n document.addEventListener('MSFullscreenChange', fn);\n }\n }\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(): Element {\n return document.fullscreenElement ||\n document.webkitFullscreenElement ||\n (document as any).mozFullScreenElement ||\n (document as any).msFullscreenElement ||\n null;\n }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BidiModule} from '@angular/cdk/bidi';\nimport {PortalModule} from '@angular/cdk/portal';\nimport {ScrollDispatchModule, VIEWPORT_RULER_PROVIDER} from '@angular/cdk/scrolling';\nimport {NgModule, Provider} from '@angular/core';\nimport {Overlay} from './overlay';\nimpo rt {OVERLAY_CONTAINER_PROVIDER} from './overlay-container';\nimport {\n CdkConnectedOverlay,\n CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER,\n CdkOverlayOrigin,\n} from './overlay-directives';\nimport {OverlayPositionBuilder} from './position/overlay-position-builder';\nimport {OVERLAY_KEYBOARD_DISPATCHER_PROVIDER} from './keyboard/overlay-keyboard-dispatcher';\nimport {ScrollStrategyOptions} from './scroll/scroll-strategy-options';\n\nexport const OVERLAY_PROVIDERS: Provider[] = [\n Overlay,\n OverlayPositionBuilder,\n OVERLAY_KEYBOARD_DISPATCHER_PROVIDER,\n VIEWPORT_RULER_PROVIDER,\n OVERLAY_CONTAINER_PROVIDER,\n CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER,\n];\n\n@NgModule({\n imports: [BidiModule, PortalModule, ScrollDispatchModule],\n exports: [CdkConnectedOverlay, CdkOverlayOrigin, ScrollDispatchModule],\n declarations: [CdkConnectedOverlay, CdkOverlayOrigin],\n providers: [OVERLAY_PROVIDERS, ScrollStrategyOptions],\n})\nexport class OverlayModule {}\n","/**\ n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Direction, Directionality} from '@angular/cdk/bidi';\nimport {coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {ESCAPE} from '@angular/cdk/keycodes';\nimport {TemplatePortal} from '@angular/cdk/portal';\nimport {\n Directive,\n ElementRef,\n EventEmitter,\n Inject,\n InjectionToken,\n Input,\n OnChanges,\n OnDestroy,\n Optional,\n Output,\n SimpleChanges,\n TemplateRef,\n ViewContainerRef,\n} from '@angular/core';\nimport {Subscription} from 'rxjs/Subscription';\nimport {Overlay} from './overlay';\nimport {OverlayConfig} from './overlay-config';\nimport {OverlayRef} from './overlay-ref';\nimport {\n ConnectedOverlayPositionChange,\n ConnectionPositionPair,\n} from './position/connected-position';\nimport {ConnectedPositionStrategy} from './posit ion/connected-position-strategy';\nimport {RepositionScrollStrategy, ScrollStrategy} from './scroll/index';\n\n\n/** Default set of positions for the overlay. Follows the behavior of a dropdown. */\nconst defaultPositionList = [\n new ConnectionPositionPair(\n {originX: 'start', originY: 'bottom'},\n {overlayX: 'start', overlayY: 'top'}),\n new ConnectionPositionPair(\n {originX: 'start', originY: 'top'},\n {overlayX: 'start', overlayY: 'bottom'}),\n new ConnectionPositionPair(\n {originX: 'end', originY: 'top'},\n {overlayX: 'end', overlayY: 'bottom'}),\n new ConnectionPositionPair(\n {originX: 'end', originY: 'bottom'},\n {overlayX: 'end', overlayY: 'top'}),\n];\n\n/** Injection token that determines the scroll handling while the connected overlay is open. */\nexport const CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY =\n new InjectionToken<() => ScrollStrategy>('cdk-connected-overlay-scroll-strategy');\n\n/** @docs-private */\nexport function CDK_CO NNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY(overlay: Overlay):\n () => RepositionScrollStrategy {\n return () => overlay.scrollStrategies.reposition();\n}\n\n/** @docs-private */\nexport const CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER = {\n provide: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY,\n deps: [Overlay],\n useFactory: CDK_CONNECTED_OVERLAY_SCROLL_STRATEGY_PROVIDER_FACTORY,\n};\n\n\n/**\n * Directive applied to an element to make it usable as an origin for an Overlay using a\n * ConnectedPositionStrategy.\n */\n@Directive({\n selector: '[cdk-overlay-origin], [overlay-origin], [cdkOverlayOrigin]',\n exportAs: 'cdkOverlayOrigin',\n})\nexport class CdkOverlayOrigin {\n constructor(\n /** Reference to the element on which the directive is applied. */\n public elementRef: ElementRef) { }\n}\n\n\n/**\n * Directive to facilitate declarative creation of an Overlay using a ConnectedPositionStrategy.\n */\n@Directive({\n selector: '[cdk-connected-overlay], [con nected-overlay], [cdkConnectedOverlay]',\n exportAs: 'cdkConnectedOverlay'\n})\nexport class CdkConnectedOverlay implements OnDestroy, OnChanges {\n private _overlayRef: OverlayRef;\n private _templatePortal: TemplatePortal;\n private _hasBackdrop = false;\n private _backdropSubscription = Subscription.EMPTY;\n private _offsetX: number = 0;\n private _offsetY: number = 0;\n private _position: ConnectedPositionStrategy;\n\n /** Origin for the connected overlay. */\n @Input('cdkConnectedOverlayOrigin') origin: CdkOverlayOrigin;\n\n /** Registered connected position pairs. */\n @Input('cdkConnectedOverlayPositions') positions: ConnectionPositionPair[];\n\n /** The offset in pixels for the overlay connection point on the x-axis */\n @Input('cdkConnectedOverlayOffsetX')\n get offsetX(): number { return this._offsetX; }\n set offsetX(offsetX: number) {\n this._offsetX = offsetX;\n if (this._position) {\n this._position.withOffsetX(offsetX);\n }\n }\n\n /** The offset in pixels for the overlay connection point on the y-axis */\n @Input('cdkConnectedOverlayOffsetY')\n get offsetY() { return this._offsetY; }\n set offsetY(offsetY: number) {\n this._offsetY = offsetY;\n if (this._position) {\n this._position.withOffsetY(offsetY);\n }\n }\n\n /** The width of the overlay panel. */\n @Input('cdkConnectedOverlayWidth') width: number | string;\n\n /** The height of the overlay panel. */\n @Input('cdkConnectedOverlayHeight') height: number | string;\n\n /** The min width of the overlay panel. */\n @Input('cdkConnectedOverlayMinWidth') minWidth: number | string;\n\n /** The min height of the overlay panel. */\n @Input('cdkConnectedOverlayMinHeight') minHeight: number | string;\n\n /** The custom class to be set on the backdrop element. */\n @Input('cdkConnectedOverlayBackdropClass') backdropClass: string;\n\n /** Strategy to be used when handling scroll events while the overlay is open. */\n @Input('cdkConnectedOve rlayScrollStrategy') scrollStrategy: ScrollStrategy =\n this._scrollStrategy();\n\n /** Whether the overlay is open. */\n @Input('cdkConnectedOverlayOpen') open: boolean = false;\n\n /** Whether or not the overlay should attach a backdrop. */\n @Input('cdkConnectedOverlayHasBackdrop')\n get hasBackdrop() { return this._hasBackdrop; }\n set hasBackdrop(value: any) { this._hasBackdrop = coerceBooleanProperty(value); }\n\n /**\n * @deprecated\n * @deletion-target 6.0.0\n */\n @Input('origin')\n get _deprecatedOrigin(): CdkOverlayOrigin { return this.origin; }\n set _deprecatedOrigin(_origin: CdkOverlayOrigin) { this.origin = _origin; }\n\n /**\n * @deprecated\n * @deletion-target 6.0.0\n */\n @Input('positions')\n get _deprecatedPositions(): ConnectionPositionPair[] { return this.positions; }\n set _deprecatedPositions(_positions: ConnectionPositionPair[]) { this.positions = _positions; }\n\n /**\n * @deprecated\n * @deletion-target 6.0.0\n */\n @ Input('offsetX')\n get _deprecatedOffsetX(): number { return this.offsetX; }\n set _deprecatedOffsetX(_offsetX: number) { this.offsetX = _offsetX; }\n\n /**\n * @deprecated\n * @deletion-target 6.0.0\n */\n @Input('offsetY')\n get _deprecatedOffsetY(): number { return this.offsetY; }\n set _deprecatedOffsetY(_offsetY: number) { this.offsetY = _offsetY; }\n\n /**\n * @deprecated\n * @deletion-target 6.0.0\n */\n @Input('width')\n get _deprecatedWidth(): number | string { return this.width; }\n set _deprecatedWidth(_width: number | string) { this.width = _width; }\n\n /**\n * @deprecated\n * @deletion-target 6.0.0\n */\n @Input('height')\n get _deprecatedHeight(): number | string { return this.height; }\n set _deprecatedHeight(_height: number | string) { this.height = _height; }\n\n /**\n * @deprecated\n * @deletion-target 6.0.0\n */\n @Input('minWidth')\n get _deprecatedMinWidth(): number | string { return this.minWidth; }\n set _deprecatedMi nWidth(_minWidth: number | string) { this.minWidth = _minWidth; }\n\n /**\n * @deprecated\n * @deletion-target 6.0.0\n */\n @Input('minHeight')\n get _deprecatedMinHeight(): number | string { return this.minHeight; }\n set _deprecatedMinHeight(_minHeight: number | string) { this.minHeight = _minHeight; }\n\n /**\n * @deprecated\n * @deletion-target 6.0.0\n */\n @Input('backdropClass')\n get _deprecatedBackdropClass(): string { return this.backdropClass; }\n set _deprecatedBackdropClass(_backdropClass: string) { this.backdropClass = _backdropClass; }\n\n /**\n * @deprecated\n * @deletion-target 6.0.0\n */\n @Input('scrollStrategy')\n get _deprecatedScrollStrategy(): ScrollStrategy { return this.scrollStrategy; }\n set _deprecatedScrollStrategy(_scrollStrategy: ScrollStrategy) {\n this.scrollStrategy = _scrollStrategy;\n }\n\n /**\n * @deprecated\n * @deletion-target 6.0.0\n */\n @Input('open')\n get _deprecatedOpen(): boolean { return this.o pen; }\n set _deprecatedOpen(_open: boolean) { this.open = _open; }\n\n /**\n * @deprecated\n * @deletion-target 6.0.0\n */\n @Input('hasBackdrop')\n get _deprecatedHasBackdrop() { return this.hasBackdrop; }\n set _deprecatedHasBackdrop(_hasBackdrop: any) { this.hasBackdrop = _hasBackdrop; }\n\n /** Event emitted when the backdrop is clicked. */\n @Output() backdropClick = new EventEmitter<void>();\n\n /** Event emitted when the position has changed. */\n @Output() positionChange = new EventEmitter<ConnectedOverlayPositionChange>();\n\n /** Event emitted when the overlay has been attached. */\n @Output() attach = new EventEmitter<void>();\n\n /** Event emitted when the overlay has been detached. */\n @Output() detach = new EventEmitter<void>();\n\n // TODO(jelbourn): inputs for size, scroll behavior, animation, etc.\n\n constructor(\n private _overlay: Overlay,\n templateRef: TemplateRef<any>,\n viewContainerRef: ViewContainerRef,\n @Inject(C DK_CONNECTED_OVERLAY_SCROLL_STRATEGY) private _scrollStrategy,\n @Optional() private _dir: Directionality) {\n this._templatePortal = new TemplatePortal(templateRef, viewContainerRef);\n }\n\n /** The associated overlay reference. */\n get overlayRef(): OverlayRef {\n return this._overlayRef;\n }\n\n /** The element's layout direction. */\n get dir(): Direction {\n return this._dir ? this._dir.value : 'ltr';\n }\n\n ngOnDestroy() {\n this._destroyOverlay();\n }\n\n ngOnChanges(changes: SimpleChanges) {\n if (this._position) {\n if (changes['positions'] || changes['_deprecatedPositions']) {\n this._position.withPositions(this.positions);\n }\n\n if (changes['origin'] || changes['_deprecatedOrigin']) {\n this._position.setOrigin(this.origin.elementRef);\n\n if (this.open) {\n this._position.apply();\n }\n }\n }\n\n if (changes['open'] || changes['_deprecatedOpen']) {\n this.open ? this._a ttachOverlay() : this._detachOverlay();\n }\n }\n\n /** Creates an overlay */\n private _createOverlay() {\n if (!this.positions || !this.positions.length) {\n this.positions = defaultPositionList;\n }\n\n this._overlayRef = this._overlay.create(this._buildConfig());\n }\n\n /** Builds the overlay config based on the directive's inputs */\n private _buildConfig(): OverlayConfig {\n const positionStrategy = this._position = this._createPositionStrategy();\n const overlayConfig = new OverlayConfig({\n positionStrategy,\n scrollStrategy: this.scrollStrategy,\n hasBackdrop: this.hasBackdrop\n });\n\n if (this.width || this.width === 0) {\n overlayConfig.width = this.width;\n }\n\n if (this.height || this.height === 0) {\n overlayConfig.height = this.height;\n }\n\n if (this.minWidth || this.minWidth === 0) {\n overlayConfig.minWidth = this.minWidth;\n }\n\n if (this.minHeight || this.minHeight === 0) {\n overlayConfig.minHeight = this.minHeight;\n }\n\n if (this.backdropClass) {\n overlayConfig.backdropClass = this.backdropClass;\n }\n\n return overlayConfig;\n }\n\n /** Returns the position strategy of the overlay to be set on the overlay config */\n private _createPositionStrategy(): ConnectedPositionStrategy {\n const primaryPosition = this.positions[0];\n const originPoint = {originX: primaryPosition.originX, originY: primaryPosition.originY};\n const overlayPoint = {overlayX: primaryPosition.overlayX, overlayY: primaryPosition.overlayY};\n const strategy = this._overlay.position()\n .connectedTo(this.origin.elementRef, originPoint, overlayPoint)\n .withOffsetX(this.offsetX)\n .withOffsetY(this.offsetY);\n\n for (let i = 1; i < this.positions.length; i++) {\n strategy.withFallbackPosition(\n {originX: this.positions[i].originX, originY: this.positions[i].originY},\n {overlayX: this.positions[i].overlay X, overlayY: this.positions[i].overlayY}\n );\n }\n\n strategy.onPositionChange.subscribe(pos => this.positionChange.emit(pos));\n\n return strategy;\n }\n\n /** Attaches the overlay and subscribes to backdrop clicks if backdrop exists */\n private _attachOverlay() {\n if (!this._overlayRef) {\n this._createOverlay();\n\n this._overlayRef!.keydownEvents().subscribe((event: KeyboardEvent) => {\n if (event.keyCode === ESCAPE) {\n this._detachOverlay();\n }\n });\n }\n\n this._position.withDirection(this.dir);\n this._overlayRef.setDirection(this.dir);\n\n if (!this._overlayRef.hasAttached()) {\n this._overlayRef.attach(this._templatePortal);\n this.attach.emit();\n }\n\n if (this.hasBackdrop) {\n this._backdropSubscription = this._overlayRef.backdropClick().subscribe(() => {\n this.backdropClick.emit();\n });\n }\n }\n\n /** Detaches the overlay and unsubscribes to backdrop clic ks if backdrop exists */\n private _detachOverlay() {\n if (this._overlayRef) {\n this._overlayRef.detach();\n this.detach.emit();\n }\n\n this._backdropSubscription.unsubscribe();\n }\n\n /** Destroys the overlay created by this directive. */\n private _destroyOverlay() {\n if (this._overlayRef) {\n this._overlayRef.dispose();\n }\n\n this._backdropSubscription.unsubscribe();\n }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n ComponentFactoryResolver,\n Injectable,\n ApplicationRef,\n Injector,\n NgZone,\n Inject,\n} from '@angular/core';\nimport {DomPortalOutlet} from '@angular/cdk/portal';\nimport {OverlayConfig} from './overlay-config';\nimport {OverlayRef} from './overlay-ref';\nimport {OverlayPositionBuilder} from './position/overlay-position-builder';\ni mport {OverlayKeyboardDispatcher} from './keyboard/overlay-keyboard-dispatcher';\nimport {OverlayContainer} from './overlay-container';\nimport {ScrollStrategyOptions} from './scroll/index';\nimport {DOCUMENT} from '@angular/common';\n\n\n/** Next overlay unique ID. */\nlet nextUniqueId = 0;\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 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 */\n@Injectable()\nexport class Overlay {\n constructor(\n /** Scrolling strategies that can be used when creating an overlay. */\n public scrollStrategies: ScrollStrategyOptions,\n private _ov erlayContainer: OverlayContainer,\n private _componentFactoryResolver: ComponentFactoryResolver,\n private _positionBuilder: OverlayPositionBuilder,\n private _keyboardDispatcher: OverlayKeyboardDispatcher,\n private _appRef: ApplicationRef,\n private _injector: Injector,\n private _ngZone: NgZone,\n @Inject(DOCUMENT) private _document: any) { }\n\n /**\n * Creates an overlay.\n * @param config Configuration applied to the overlay.\n * @returns Reference to the created overlay.\n */\n create(config?: OverlayConfig): OverlayRef {\n const pane = this._createPaneElement();\n const portalOutlet = this._createPortalOutlet(pane);\n\n return new OverlayRef(\n portalOutlet,\n pane,\n new OverlayConfig(config),\n this._ngZone,\n this._keyboardDispatcher,\n this._document\n );\n }\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(): OverlayPositionBuilder {\n return this._positionBuilder;\n }\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 private _createPaneElement(): HTMLElement {\n const pane = this._document.createElement('div');\n\n pane.id = `cdk-overlay-${nextUniqueId++}`;\n pane.classList.add('cdk-overlay-pane');\n this._overlayContainer.getContainerElement().appendChild(pane);\n\n return pane;\n }\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 private _createPortalOutlet(pane: HTMLElement): DomPortalOutlet {\n return new DomPortalOutlet(pane, this._componentFactoryResolver, this._appRef, this._i njector);\n }\n\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, InjectionToken, Inject, Optional, SkipSelf, OnDestroy} from '@angular/core';\nimport {DOCUMENT} from '@angular/common';\n\n\n/** Container inside which all overlays will render. */\n@Injectable()\nexport class OverlayContainer implements OnDestroy {\n protected _containerElement: HTMLElement;\n\n constructor(@Inject(DOCUMENT) private _document: any) {}\n\n ngOnDestroy() {\n if (this._containerElement && this._containerElement.parentNode) {\n this._containerElement.parentNode.removeChild(this._containerElement);\n }\n }\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(): HTMLElement {\n if (!this._containerElement) { this._createContainer(); }\n return this._containerElement;\n }\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 protected _createContainer(): void {\n const container = this._document.createElement('div');\n\n container.classList.add('cdk-overlay-container');\n this._document.body.appendChild(container);\n this._containerElement = container;\n }\n}\n\n/** @docs-private */\nexport function OVERLAY_CONTAINER_PROVIDER_FACTORY(parentContainer: OverlayContainer,\n _document: any) {\n return parentContainer || new OverlayContainer(_document);\n}\n\n/** @docs-private */\nexport const OVERLAY_CONTAINER_PROVIDER = {\n // If there is already an OverlayContainer available, use that. Otherwise, provide a new one.\n provide: OverlayContainer,\n deps: [ \n [new Optional(), new SkipSelf(), OverlayContainer],\n DOCUMENT as InjectionToken<any> // We need to use the InjectionToken somewhere to keep TS happy\n ],\n useFactory: OVERLAY_CONTAINER_PROVIDER_FACTORY\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, Inject, InjectionToken, Optional, SkipSelf, OnDestroy} from '@angular/core';\nimport {OverlayRef} from '../overlay-ref';\nimport {Subscription} from 'rxjs/Subscription';\nimport {filter} from 'rxjs/operators/filter';\nimport {fromEvent} from 'rxjs/observable/fromEvent';\nimport {DOCUMENT} from '@angular/common';\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 ove rlay opens.\n */\n@Injectable()\nexport class OverlayKeyboardDispatcher implements OnDestroy {\n\n /** Currently attached overlays in the order they were attached. */\n _attachedOverlays: OverlayRef[] = [];\n\n private _keydownEventSubscription: Subscription | null;\n\n constructor(@Inject(DOCUMENT) private _document: any) {}\n\n ngOnDestroy() {\n this._unsubscribeFromKeydownEvents();\n }\n\n /** Add a new overlay to the list of attached overlay refs. */\n add(overlayRef: OverlayRef): void {\n // Lazily start dispatcher once first overlay is added\n if (!this._keydownEventSubscription) {\n this._subscribeToKeydownEvents();\n }\n\n this._attachedOverlays.push(overlayRef);\n }\n\n /** Remove an overlay from the list of attached overlay refs. */\n remove(overlayRef: OverlayRef): void {\n const index = this._attachedOverlays.indexOf(overlayRef);\n\n if (index > -1) {\n this._attachedOverlays.splice(index, 1);\n }\n\n // Remove the global l istener once there are no more overlays.\n if (this._attachedOverlays.length === 0) {\n this._unsubscribeFromKeydownEvents();\n }\n }\n\n /**\n * Subscribe to keydown events that land on the body and dispatch those\n * events to the appropriate overlay.\n */\n private _subscribeToKeydownEvents(): void {\n const bodyKeydownEvents = fromEvent<KeyboardEvent>(this._document.body, 'keydown', true);\n\n this._keydownEventSubscription = bodyKeydownEvents.pipe(\n filter(() => !!this._attachedOverlays.length)\n ).subscribe(event => {\n // Dispatch keydown event to the correct overlay.\n this._selectOverlayFromEvent(event)._keydownEvents.next(event);\n });\n }\n\n /** Removes the global keydown subscription. */\n private _unsubscribeFromKeydownEvents(): void {\n if (this._keydownEventSubscription) {\n this._keydownEventSubscription.unsubscribe();\n this._keydownEventSubscription = null;\n }\n }\n\n /** Select the appropriate overlay from a keydown event. */\n private _selectOverlayFromEvent(event: KeyboardEvent): OverlayRef {\n // Check if any overlays contain the event\n const targetedOverlay = this._attachedOverlays.find(overlay => {\n return overlay.overlayElement === event.target ||\n overlay.overlayElement.contains(event.target as HTMLElement);\n });\n\n // Use the overlay if it exists, otherwise choose the most recently attached one\n return targetedOverlay || this._attachedOverlays[this._attachedOverlays.length - 1];\n }\n\n}\n\n/** @docs-private */\nexport function OVERLAY_KEYBOARD_DISPATCHER_PROVIDER_FACTORY(\n dispatcher: OverlayKeyboardDispatcher, _document: any) {\n return dispatcher || new OverlayKeyboardDispatcher(_document);\n}\n\n/** @docs-private */\nexport const OVERLAY_KEYBOARD_DISPATCHER_PROVIDER = {\n // If there is already an OverlayKeyboardDispatcher available, use that.\n // Otherwise, provide a new one.\n provide: OverlayKeyboardDispatcher,\ n deps: [\n [new Optional(), new SkipSelf(), OverlayKeyboardDispatcher],\n\n // Coerce to `InjectionToken` so that the `deps` match the \"shape\"\n // of the type expected by Angular\n DOCUMENT as InjectionToken<any>\n ],\n useFactory: OVERLAY_KEYBOARD_DISPATCHER_PROVIDER_FACTORY\n};\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ElementRef, Injectable, Inject} from '@angular/core';\nimport {ViewportRuler} from '@angular/cdk/scrolling';\nimport {ConnectedPositionStrategy} from './connected-position-strategy';\nimport {GlobalPositionStrategy} from './global-position-strategy';\nimport {OverlayConnectionPosition, OriginConnectionPosition} from './connected-position';\nimport {DOCUMENT} from '@angular/common';\n\n\n/** Builder for overlay position strategy. */\n@Injectable()\nexport class OverlayPo sitionBuilder {\n constructor(private _viewportRuler: ViewportRuler,\n @Inject(DOCUMENT) private _document: any) { }\n\n /**\n * Creates a global position strategy.\n */\n global(): GlobalPositionStrategy {\n return new GlobalPositionStrategy(this._document);\n }\n\n /**\n * Creates a relative position strategy.\n * @param elementRef\n * @param originPos\n * @param overlayPos\n */\n connectedTo(\n elementRef: ElementRef,\n originPos: OriginConnectionPosition,\n overlayPos: OverlayConnectionPosition): ConnectedPositionStrategy {\n\n return new ConnectedPositionStrategy(originPos, overlayPos, elementRef,\n this._viewportRuler, this._document);\n }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {PositionStrategy} from './position-strategy';\nimport { OverlayRef} from '../overlay-ref';\n\n\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 */\nexport class GlobalPositionStrategy implements PositionStrategy {\n /** The overlay to which this strategy is attached. */\n private _overlayRef: OverlayRef;\n\n private _cssPosition: string = 'static';\n private _topOffset: string = '';\n private _bottomOffset: string = '';\n private _leftOffset: string = '';\n private _rightOffset: string = '';\n private _alignItems: string = '';\n private _justifyContent: string = '';\n private _width: string = '';\n private _height: string = '';\n\n /** A lazily-created wrapper for the overlay element that is used as a flex container. */\n private _wrapper: HTMLElement | null = null;\n\n constructor(pri vate _document: any) {}\n\n attach(overlayRef: OverlayRef): void {\n this._overlayRef = overlayRef;\n }\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: string = ''): this {\n this._bottomOffset = '';\n this._topOffset = value;\n this._alignItems = 'flex-start';\n return this;\n }\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: string = ''): this {\n this._rightOffset = '';\n this._leftOffset = value;\n this._justifyContent = 'flex-start';\n return this;\n }\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: string = ''): this {\n this._topOffset = '';\n this._bottomOffset = value;\n this._alignItems = 'flex-end';\n re turn this;\n }\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: string = ''): this {\n this._leftOffset = '';\n this._rightOffset = value;\n this._justifyContent = 'flex-end';\n return this;\n }\n\n /**\n * Sets the overlay width and clears any previously set width.\n * @param value New width for the overlay\n */\n width(value: string = ''): this {\n this._width = value;\n\n // When the width is 100%, we should reset the `left` and the offset,\n // in order to ensure that the element is flush against the viewport edge.\n if (value === '100%') {\n this.left('0px');\n }\n\n return this;\n }\n\n /**\n * Sets the overlay height and clears any previously set height.\n * @param value New height for the overlay\n */\n height(value: string = ''): this {\n this._height = value;\n\n // When the height is 100%, we should re set the `top` and the offset,\n // in order to ensure that the element is flush against the viewport edge.\n if (value === '100%') {\n this.top('0px');\n }\n\n return this;\n }\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: string = ''): this {\n this.left(offset);\n this._justifyContent = 'center';\n return this;\n }\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: string = ''): this {\n this.top(offset);\n this._alignItems = 'center';\n return this;\n }\n\n /**\n * Apply the position to the element.\n * @docs-private\n *\n * @returns Resolved when the styles have been applied.\n */\n apply(): void {\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.hasAttached()) {\n return;\n }\n\n const element = this._overlayRef.overlayElement;\n\n if (!this._wrapper && element.parentNode) {\n this._wrapper = this._document.createElement('div');\n this._wrapper!.classList.add('cdk-global-overlay-wrapper');\n element.parentNode.insertBefore(this._wrapper!, element);\n this._wrapper!.appendChild(element);\n }\n\n let styles = element.style;\n let parentStyles = (element.parentNode as HTMLElement).style;\n\n styles.position = this._cssPosition;\n styles.marginTop = this._topOffset;\n styles.marginLeft = this._leftOffset;\n styles.marginBottom = this._bottomOffset;\n styles.marginRight = this._rightOffset;\n styles.width = this._width;\n styles.h eight = this._height;\n\n parentStyles.justifyContent = this._justifyContent;\n parentStyles.alignItems = this._alignItems;\n }\n\n /** Removes the wrapper element from the DOM. */\n dispose(): void {\n if (this._wrapper && this._wrapper.parentNode) {\n this._wrapper.parentNode.removeChild(this._wrapper);\n this._wrapper = null;\n }\n }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {PositionStrategy} from './position-strategy';\nimport {ElementRef} from '@angular/core';\nimport {ViewportRuler} from '@angular/cdk/scrolling';\nimport {\n ConnectionPositionPair,\n OriginConnectionPosition,\n OverlayConnectionPosition,\n ConnectedOverlayPositionChange,\n ScrollingVisibility,\n} from './connected-position';\nimport {Subject} from 'rxjs/Subject';\nimport {Subscription} from 'rxjs/Su bscription';\nimport {Observable} from 'rxjs/Observable';\nimport {CdkScrollable} from '@angular/cdk/scrolling';\nimport {isElementScrolledOutsideView, isElementClippedByScrolling} from './scroll-clip';\nimport {OverlayRef} from '../overlay-ref';\n\n\n\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 */\nexport class ConnectedPositionStrategy implements PositionStrategy {\n /** The overlay to which this strategy is attached. */\n private _overlayRef: OverlayRef;\n\n /** Layout direction of the position strategy. */\n private _dir = 'ltr';\n\n /** The offset in pixels for the overlay connection point on the x-axis */\n private _o ffsetX: number = 0;\n\n /** The offset in pixels for the overlay connection point on the y-axis */\n private _offsetY: number = 0;\n\n /** The Scrollable containers used to check scrollable view properties on position change. */\n private scrollables: CdkScrollable[] = [];\n\n /** Subscription to viewport resize events. */\n private _resizeSubscription = Subscription.EMPTY;\n\n /** Whether the we're dealing with an RTL context */\n get _isRtl() {\n return this._dir === 'rtl';\n }\n\n /** Ordered list of preferred positions, from most to least desirable. */\n _preferredPositions: ConnectionPositionPair[] = [];\n\n /** The origin element against which the overlay will be positioned. */\n private _origin: HTMLElement;\n\n /** The overlay pane element. */\n private _pane: HTMLElement;\n\n /** The last position to have been calculated as the best fit position. */\n private _lastConnectedPosition: ConnectionPositionPair;\n\n /** Whether the position strategy is applie d currently. */\n private _applied = false;\n\n /** Whether the overlay position is locked. */\n private _positionLocked = false;\n\n private _onPositionChange = new Subject<ConnectedOverlayPositionChange>();\n\n /** Emits an event when the connection point changes. */\n get onPositionChange(): Observable<ConnectedOverlayPositionChange> {\n return this._onPositionChange.asObservable();\n }\n\n constructor(\n originPos: OriginConnectionPosition,\n overlayPos: OverlayConnectionPosition,\n private _connectedTo: ElementRef,\n private _viewportRuler: ViewportRuler,\n private _document: any) {\n this._origin = this._connectedTo.nativeElement;\n this.withFallbackPosition(originPos, overlayPos);\n }\n\n /** Ordered list of preferred positions, from most to least desirable. */\n get positions(): ConnectionPositionPair[] {\n return this._preferredPositions;\n }\n\n /** Attach this position strategy to an overlay. */\n attach(overlayRef: Overl ayRef): void {\n this._overlayRef = overlayRef;\n this._pane = overlayRef.overlayElement;\n this._resizeSubscription.unsubscribe();\n this._resizeSubscription = this._viewportRuler.change().subscribe(() => this.apply());\n }\n\n /** Disposes all resources used by the position strategy. */\n dispose() {\n this._applied = false;\n this._resizeSubscription.unsubscribe();\n this._onPositionChange.complete();\n }\n\n /** @docs-private */\n detach() {\n this._applied = false;\n this._resizeSubscription.unsubscribe();\n }\n\n /**\n * Updates the position of the overlay element, using whichever preferred position relative\n * to the origin fits on-screen.\n * @docs-private\n */\n apply(): void {\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._applied & & this._positionLocked && this._lastConnectedPosition) {\n this.recalculateLastPosition();\n return;\n }\n\n this._applied = true;\n\n // We need the bounding rects for the origin and the overlay to determine how to position\n // the overlay relative to the origin.\n const element = this._pane;\n const originRect = this._origin.getBoundingClientRect();\n const overlayRect = element.getBoundingClientRect();\n\n // We use the viewport size to determine whether a position would go off-screen.\n const viewportSize = this._viewportRuler.getViewportSize();\n\n // Fallback point if none of the fallbacks fit into the viewport.\n let fallbackPoint: OverlayPoint | undefined;\n let fallbackPosition: ConnectionPositionPair | undefined;\n\n // We want to place the overlay in the first of the preferred positions such that the\n // overlay fits on-screen.\n for (let pos of this._preferredPositions) {\n // Get the (x, y) point of connectio n on the origin, and then use that to get the\n // (top, left) coordinate for the overlay at `pos`.\n let originPoint = this._getOriginConnectionPoint(originRect, pos);\n let overlayPoint = this._getOverlayPoint(originPoint, overlayRect, viewportSize, pos);\n\n // If the overlay in the calculated position fits on-screen, put it there and we're done.\n if (overlayPoint.fitsInViewport) {\n this._setElementPosition(element, overlayRect, overlayPoint, pos);\n\n // Save the last connected position in case the position needs to be re-calculated.\n this._lastConnectedPosition = pos;\n\n return;\n } else if (!fallbackPoint || fallbackPoint.visibleArea < overlayPoint.visibleArea) {\n fallbackPoint = overlayPoint;\n fallbackPosition = pos;\n }\n }\n\n // If none of the preferred positions were in the viewport, take the one\n // with the largest visible area.\n this._setElementPosition(element, overlayRect , fallbackPoint!, fallbackPosition!);\n }\n\n /**\n * Re-positions 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 recalculateLastPosition(): void {\n // If the overlay has never been positioned before, do nothing.\n if (!this._lastConnectedPosition) {\n return;\n }\n\n const originRect = this._origin.getBoundingClientRect();\n const overlayRect = this._pane.getBoundingClientRect();\n const viewportSize = this._viewportRuler.getViewportSize();\n const lastPosition = this._lastConnectedPosition || this._preferredPositions[0];\n\n let originPoint = this._getOriginConnectionPoint(originRect, lastPosition);\n let overlayPoint = this._getOverlayPoint(originPoint, overlayRect, viewportSize, lastPosition);\n this._setElementPosition(this._pane, over layRect, overlayPoint, lastPosition);\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: CdkScrollable[]) {\n this.scrollables = scrollables;\n }\n\n /**\n * Adds a new preferred fallback position.\n * @param originPos\n * @param overlayPos\n */\n withFallbackPosition(\n originPos: OriginConnectionPosition,\n overlayPos: OverlayConnectionPosition,\n offsetX?: number,\n offsetY?: number): this {\n\n const position = new ConnectionPositionPair(originPos, overlayPos, offsetX, offsetY);\n this._preferredPositions.push(position);\n return this;\n }\n\n /**\n * Sets the layout direction so the overlay's position can be adjusted to match.\n * @param dir New layout direction.\n */\n withDirection(dir: 'ltr' | 'rtl'): this {\n this._dir = dir;\n return this;\n }\n\n /**\n * Sets an offset for the overlay's connection point on the x-axis\n * @param offset New offset in the X axis.\n */\n withOffsetX(offset: number): this {\n this._offsetX = offset;\n return this;\n }\n\n /**\n * Sets an offset for the overlay's connection point on the y-axis\n * @param offset New offset in the Y axis.\n */\n withOffsetY(offset: number): this {\n this._offsetY = offset;\n return this;\n }\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: boolean): this {\n this._positionLocked = isLocked;\n return this;\n }\n\n /**\n * Overwrites the current set of positions with an array of new ones.\n * @param positions Position pairs to be set on the strategy.\n */\n withPositions(positions: ConnectionPositionPair[]): this {\n this._preferredPositions = positions.slice();\n return this;\n }\n\n /**\n * Sets the origin element, relative to which to position the overlay.\n * @param origin Reference to the new origin element.\n */\n setOrigin(origin: ElementRef): this {\n this._origin = origin.nativeElement;\n return this;\n }\n\n /**\n * Gets the horizontal (x) \"start\" dimension based on whether the overlay is in an RTL context.\n * @param rect\n */\n private _getStartX(rect: ClientRect): number {\n return this._isRtl ? rect.right : rect.left;\n }\n\n /**\n * Gets the horizontal (x) \"end\" dimension based on whether the overlay is in an RTL context.\n * @param rect\n */\n private _getEndX(rect: ClientRect): number {\n return this._isRtl ? rect.left : rect.right;\n }\n\n\ n /**\n * Gets the (x, y) coordinate of a connection point on the origin based on a relative position.\n * @param originRect\n * @param pos\n */\n private _getOriginConnectionPoint(originRect: ClientRect, pos: ConnectionPositionPair): Point {\n const originStartX = this._getStartX(originRect);\n const originEndX = this._getEndX(originRect);\n\n let x: number;\n if (pos.originX == 'center') {\n x = originStartX + (originRect.width / 2);\n } else {\n x = pos.originX == 'start' ? originStartX : originEndX;\n }\n\n let y: number;\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\n return {x, y};\n }\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, as well as how much of the element\n * would be inside the viewport at that position.\n */\n private _getOverlayPoint(\n originPoint: Point,\n overlayRect: ClientRect,\n viewportSize: {width: number; height: number},\n pos: ConnectionPositionPair): OverlayPoint {\n // Calculate the (overlayStartX, overlayStartY), the start of the potential overlay position\n // relative to the origin point.\n let overlayStartX: number;\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\n let overlayStartY: number;\n if (pos.overlayY == 'center') {\n overlayStartY = -overlayRect.height / 2;\n } else {\n overlayStartY = pos.overlayY == 'top' ? 0 : -overlayRect.height;\n }\n\n // The (x, y) offsets of the overlay based on the current position.\n let offsetX = typeof pos .offsetX === 'undefined' ? this._offsetX : pos.offsetX;\n let offsetY = typeof pos.offsetY === 'undefined' ? this._offsetY : pos.offsetY;\n\n // The (x, y) coordinates of the overlay.\n let x = originPoint.x + overlayStartX + offsetX;\n let y = originPoint.y + overlayStartY + offsetY;\n\n // How much the overlay would overflow at this position, on each side.\n let leftOverflow = 0 - x;\n let rightOverflow = (x + overlayRect.width) - viewportSize.width;\n let topOverflow = 0 - y;\n let bottomOverflow = (y + overlayRect.height) - viewportSize.height;\n\n // Visible parts of the element on each axis.\n let visibleWidth = this._subtractOverflows(overlayRect.width, leftOverflow, rightOverflow);\n let visibleHeight = this._subtractOverflows(overlayRect.height, topOverflow, bottomOverflow);\n\n // The area of the element that's within the viewport.\n let visibleArea = visibleWidth * visibleHeight;\n let fitsInViewport = (overlayRect.width * over layRect.height) === visibleArea;\n\n return {x, y, fitsInViewport, visibleArea};\n }\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 private _getScrollVisibility(overlay: HTMLElement): ScrollingVisibility {\n const originBounds = this._origin.getBoundingClientRect();\n const overlayBounds = overlay.getBoundingClientRect();\n const scrollContainerBounds =\n this.scrollables.map(s => s.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\n /** Physically positions the overlay element to the given coordinate. */\n private _setElementPosition(\n element: HTMLElement,\n overlayRect: ClientRect,\n overlayPoint: Point,\n pos: ConnectionPositionPair) {\n\n // We want to set either `top` or `bottom` based on whether the overlay wants to appear above\n // or below the origin and the direction in which the element will expand.\n let verticalStyleProperty = pos.overlayY === 'bottom' ? 'bottom' : 'top';\n\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 let y = verticalStyleProperty === 'top' ?\n overlayPoint.y :\n this._document.documentElement.clientHeight - (overlayPoint.y + overlayRect.height);\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: string;\n if (this._dir === 'rtl') {\n horizontalStyleProperty = pos.overlayX === 'end' ? 'left' : 'right';\n } else {\n horizontalStyleProperty = pos.overlayX === 'end' ? 'right' : 'left';\n }\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 let x = horizontalStyleProperty === 'left' ?\n overlayPoint.x :\n this._document.documentElement.clientWidth - (overlayPoint.x + overlayRect.width);\n\n\n // Reset any existing styles. This is necessary in case the preferred position has\n // changed since the last `apply`.\n ['top', 'bottom', 'left', 'right'].forEach(p => element.style[p] = null);\n\n element.style[verticalStyleProperty] = `${y}px` ;\n element.style[horizontalStyleProperty] = `${x}px`;\n\n // Notify that the position has been changed along with its change properties.\n const scrollableViewProperties = this._getScrollVisibility(element);\n const positionChange = new ConnectedOverlayPositionChange(pos, scrollableViewProperties);\n this._onPositionChange.next(positionChange);\n }\n\n /**\n * Subtracts the amount that an element is overflowing on an axis from it's length.\n */\n private _subtractOverflows(length: number, ...overflows: number[]): number {\n return overflows.reduce((currentValue: number, currentOverflow: number) => {\n return currentValue - Math.max(currentOverflow, 0);\n }, length);\n }\n}\n\n/** A simple (x, y) coordinate. */\ninterface Point {\n x: number;\n y: number;\n}\n\n/**\n * Expands the simple (x, y) coordinate by adding info about whether the\n * element would fit inside the viewport at that position, as well as\n * how much of the element would be vis ible.\n */\ninterface OverlayPoint extends Point {\n visibleArea: number;\n fitsInViewport: boolean;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Direction} from '@angular/cdk/bidi';\nimport {ComponentPortal, Portal, PortalOutlet, TemplatePortal} from '@angular/cdk/portal';\nimport {ComponentRef, EmbeddedViewRef, NgZone} from '@angular/core';\nimport {Observable} from 'rxjs/Observable';\nimport {take} from 'rxjs/operators/take';\nimport {Subject} from 'rxjs/Subject';\nimport {OverlayKeyboardDispatcher} from './keyboard/overlay-keyboard-dispatcher';\nimport {OverlayConfig} from './overlay-config';\n\n\n/** An object where all of its properties cannot be written. */\nexport type ImmutableObject<T> = {\n readonly [P in keyof T]: T[P];\n};\n\n/**\n * Reference to an overlay that has been created with the O verlay service.\n * Used to manipulate or dispose of said overlay.\n */\nexport class OverlayRef implements PortalOutlet {\n private _backdropElement: HTMLElement | null = null;\n private _backdropClick: Subject<MouseEvent> = new Subject();\n private _attachments = new Subject<void>();\n private _detachments = new Subject<void>();\n\n /** Stream of keydown events dispatched to this overlay. */\n _keydownEvents = new Subject<KeyboardEvent>();\n\n constructor(\n private _portalOutlet: PortalOutlet,\n private _pane: HTMLElement,\n private _config: ImmutableObject<OverlayConfig>,\n private _ngZone: NgZone,\n private _keyboardDispatcher: OverlayKeyboardDispatcher,\n private _document: Document) {\n\n if (_config.scrollStrategy) {\n _config.scrollStrategy.attach(this);\n }\n }\n\n /** The overlay's HTML element */\n get overlayElement(): HTMLElement {\n return this._pane;\n }\n\n /** The overlay's backdrop HTML element. */\n get bac kdropElement(): HTMLElement | null {\n return this._backdropElement;\n }\n\n attach<T>(portal: ComponentPortal<T>): ComponentRef<T>;\n attach<T>(portal: TemplatePortal<T>): EmbeddedViewRef<T>;\n attach(portal: any): any;\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: Portal<any>): any {\n let attachResult = this._portalOutlet.attach(portal);\n\n if (this._config.positionStrategy) {\n this._config.positionStrategy.attach(this);\n }\n\n // Update the pane element with the given configuration.\n this._updateStackingOrder();\n this._updateElementSize();\n this._updateElementDirection();\n\n if (this._config.scrollStrategy) {\n this._config.scrollStrategy.enable();\n }\n\n // Update the position once the zone is stable so that the overlay will be fully rendered\n // before attempting to position it, as the position may depend on the size of the rendered\n // content.\n this._ngZone.onStable.asObservable().pipe(take(1)).subscribe(() => {\n // The overlay could've been detached before the zone has stabilized.\n if (this.hasAttached()) {\n this.updatePosition();\n }\n });\n\n // Enable pointer events for the overlay pane element.\n this._togglePointerEvents(true);\n\n if (this._config.hasBackdrop) {\n this._attachBackdrop();\n }\n\n if (this._config.panelClass) {\n // We can't do a spread here, because IE doesn't support setting multiple classes.\n if (Array.isArray(this._config.panelClass)) {\n this._config.panelClass.forEach(cls => this._pane.classList.add(cls));\n } else {\n this._pane.classList.add(this._config.panelClass);\n }\n }\n\n // Only emit the `attachments` event once all other se tup is done.\n this._attachments.next();\n\n // Track this overlay by the keyboard dispatcher\n this._keyboardDispatcher.add(this);\n\n return attachResult;\n }\n\n /**\n * Detaches an overlay from a portal.\n * @returns The portal detachment result.\n */\n detach(): any {\n if (!this.hasAttached()) {\n return;\n }\n\n this.detachBackdrop();\n\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\n if (this._config.positionStrategy && this._config.positionStrategy.detach) {\n this._config.positionStrategy.detach();\n }\n\n if (this._config.scrollStrategy) {\n this._config.scrollStrategy.disable();\n }\n\n const detachmentResult = this._portalOutlet.detach();\n\n // Only emit after everything is detached.\n this._detachments.next();\n\n // Remove this overlay from keyboard dispatcher tracking\n this._keyboardDispatcher.remove(this);\n\n return detachmentResult;\n }\n\n /** Cleans up the overlay from the DOM. */\n dispose(): void {\n const isAttached = this.hasAttached();\n\n if (this._config.positionStrategy) {\n this._config.positionStrategy.dispose();\n }\n\n if (this._config.scrollStrategy) {\n this._config.scrollStrategy.disable();\n }\n\n this.detachBackdrop();\n this._keyboardDispatcher.remove(this);\n this._portalOutlet.dispose();\n this._attachments.complete();\n this._backdropClick.complete();\n this._keydownEvents.complete();\n\n if (isAttached) {\n this._detachments.next();\n }\n\n this._detachments.complete();\n }\n\n /** Whether the overlay has attached content. */\n hasAttached(): boolean {\n return this._portalOutlet.hasAttached();\n }\n\n /** G ets an observable that emits when the backdrop has been clicked. */\n backdropClick(): Observable<MouseEvent> {\n return this._backdropClick.asObservable();\n }\n\n /** Gets an observable that emits when the overlay has been attached. */\n attachments(): Observable<void> {\n return this._attachments.asObservable();\n }\n\n /** Gets an observable that emits when the overlay has been detached. */\n detachments(): Observable<void> {\n return this._detachments.asObservable();\n }\n\n /** Gets an observable of keydown events targeted to this overlay. */\n keydownEvents(): Observable<KeyboardEvent> {\n return this._keydownEvents.asObservable();\n }\n\n /** Gets the the current overlay configuration, which is immutable. */\n getConfig(): OverlayConfig {\n return this._config;\n }\n\n /** Updates the position of the overlay based on the position strategy. */\n updatePosition() {\n if (this._config.positionStrategy) {\n this._config.positionStrategy.app ly();\n }\n }\n\n /** Update the size properties of the overlay. */\n updateSize(sizeConfig: OverlaySizeConfig) {\n this._config = {...this._config, ...sizeConfig};\n this._updateElementSize();\n }\n\n /** Sets the LTR/RTL direction for the overlay. */\n setDirection(dir: Direction) {\n this._config = {...this._config, direction: dir};\n this._updateElementDirection();\n }\n\n /** Updates the text direction of the overlay panel. */\n private _updateElementDirection() {\n this._pane.setAttribute('dir', this._config.direction!);\n }\n\n /** Updates the size of the overlay element based on the overlay config. */\n private _updateElementSize() {\n if (this._config.width || this._config.width === 0) {\n this._pane.style.width = formatCssUnit(this._config.width);\n }\n\n if (this._config.height || this._config.height === 0) {\n this._pane.style.height = formatCssUnit(this._config.height);\n }\n\n if (this._config.minWidth || this._con fig.minWidth === 0) {\n this._pane.style.minWidth = formatCssUnit(this._config.minWidth);\n }\n\n if (this._config.minHeight || this._config.minHeight === 0) {\n this._pane.style.minHeight = formatCssUnit(this._config.minHeight);\n }\n\n if (this._config.maxWidth || this._config.maxWidth === 0) {\n this._pane.style.maxWidth = formatCssUnit(this._config.maxWidth);\n }\n\n if (this._config.maxHeight || this._config.maxHeight === 0) {\n this._pane.style.maxHeight = formatCssUnit(this._config.maxHeight);\n }\n }\n\n /** Toggles the pointer events for the overlay pane element. */\n private _togglePointerEvents(enablePointer: boolean) {\n this._pane.style.pointerEvents = enablePointer ? 'auto' : 'none';\n }\n\n /** Attaches a backdrop for this overlay. */\n private _attachBackdrop() {\n const showingClass = 'cdk-overlay-backdrop-showing';\n\n this._backdropElement = this._document.createElement('div');\n this._backdropElement.clas sList.add('cdk-overlay-backdrop');\n\n if (this._config.backdropClass) {\n this._backdropElement.classList.add(this._config.backdropClass);\n }\n\n // Insert the backdrop before the pane in the DOM order,\n // in order to handle stacked overlays properly.\n this._pane.parentElement!.insertBefore(this._backdropElement, this._pane);\n\n // Forward backdrop clicks such that the consumer of the overlay can perform whatever\n // action desired when such a click occurs (usually closing the overlay).\n this._backdropElement.addEventListener('click',\n (event: MouseEvent) => this._backdropClick.next(event));\n\n // Add class to fade-in the backdrop after one frame.\n if (typeof requestAnimationFrame !== 'undefined') {\n this._ngZone.runOutsideAngular(() => {\n requestAnimationFrame(() => {\n if (this._backdropElement) {\n this._backdropElement.classList.add(showingClass);\n }\n });\n });\n } el se {\n this._backdropElement.classList.add(showingClass);\n }\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 private _updateStackingOrder() {\n if (this._pane.nextSibling) {\n this._pane.parentNode!.appendChild(this._pane);\n }\n }\n\n /** Detaches the backdrop (if any) associated with the overlay. */\n detachBackdrop(): void {\n let backdropToDetach = this._backdropElement;\n\n if (backdropToDetach) {\n let finishDetach = () => {\n // It may not be attached to anything in certain cases (e.g. unit tests).\n if (backdropToDetach && backdropToDetach.parentNode) {\n backdropToDetach.pare ntNode.removeChild(backdropToDetach);\n }\n\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 == backdropToDetach) {\n this._backdropElement = null;\n }\n };\n\n backdropToDetach.classList.remove('cdk-overlay-backdrop-showing');\n\n if (this._config.backdropClass) {\n backdropToDetach.classList.remove(this._config.backdropClass);\n }\n\n backdropToDetach.addEventListener('transitionend', finishDetach);\n\n // If the backdrop doesn't have a transition, the `transitionend` event won't fire.\n // In this case we make it unclickable and we try to remove it after a delay.\n backdropToDetach.style.pointerEvents = 'none';\n\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._ngZone.runOutsideAngular(() => {\n setTimeout(finishDetach, 500);\n });\n }\n }\n}\n\nfunction formatCssUnit(value: number | string) {\n return typeof value === 'string' ? value as string : `${value}px`;\n}\n\n\n/** Size properties for an overlay. */\nexport interface OverlaySizeConfig {\n width?: number | string;\n height?: number | string;\n minWidth?: number | string;\n minHeight?: number | string;\n maxWidth?: number | string;\n maxHeight?: number | string;\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {CdkScrollable, ScrollDispatcher} from '@angular/cdk/scrolling';\n\n// Export pre-defined scroll st rategies and interface to build custom ones.\nexport {ScrollStrategy} from './scroll-strategy';\nexport {ScrollStrategyOptions} from './scroll-strategy-options';\nexport {RepositionScrollStrategy} from './reposition-scroll-strategy';\nexport {CloseScrollStrategy} from './close-scroll-strategy';\nexport {NoopScrollStrategy} from './noop-scroll-strategy';\nexport {BlockScrollStrategy} from './block-scroll-strategy';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {Injectable, NgZone, Inject} from '@angular/core';\nimport {CloseScrollStrategy, CloseScrollStrategyConfig} from './close-scroll-strategy';\nimport {NoopScrollStrategy} from './noop-scroll-strategy';\nimport {BlockScrollStrategy} from './block-scroll-strategy';\nimport {ScrollDispatcher} from '@angular/cdk/scrolling';\nimport {ViewportRuler} from '@angular/ cdk/scrolling';\nimport {DOCUMENT} from '@angular/common';\nimport {\n RepositionScrollStrategy,\n RepositionScrollStrategyConfig,\n} from './reposition-scroll-strategy';\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 */\n@Injectable()\nexport class ScrollStrategyOptions {\n private _document: Document;\n\n constructor(\n private _scrollDispatcher: ScrollDispatcher,\n private _viewportRuler: ViewportRuler,\n private _ngZone: NgZone,\n @Inject(DOCUMENT) document: any) {\n this._document = document;\n }\n\n /** Do nothing on scroll. */\n noop = () => new NoopScrollStrategy();\n\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?: CloseScrollStrategyConfig) => new CloseScrollStrategy(this._scrollDispatcher,\n this._ngZone, this._viewportRuler, config)\n\n /** Block scrolling. */\n block = () => new BlockScrollStrategy(this._viewportRuler, this._document);\n\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?: RepositionScrollStrategyConfig) => new RepositionScrollStrategy(\n this._scrollDispatcher, this._viewportRuler, this._ngZone, config)\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {NgZone} from '@angular/core';\nimport {Subscription} from 'rxjs/Subscription';\nimport {ScrollStrategy, getMatScrollStrategyAlreadyAttachedError} from './scroll-strategy';\nimport {OverlayRef} from '../overlay-ref';\nimpo rt {ScrollDispatcher, ViewportRuler} from '@angular/cdk/scrolling';\nimport {isElementScrolledOutsideView} from '../position/scroll-clip';\n\n/**\n * Config options for the RepositionScrollStrategy.\n */\nexport interface RepositionScrollStrategyConfig {\n /** Time in milliseconds to throttle the scroll events. */\n scrollThrottle?: number;\n\n /** Whether to close the overlay once the user has scrolled away completely. */\n autoClose?: boolean;\n}\n\n/**\n * Strategy that will update the element position as the user is scrolling.\n */\nexport class RepositionScrollStrategy implements ScrollStrategy {\n private _scrollSubscription: Subscription|null = null;\n private _overlayRef: OverlayRef;\n\n constructor(\n private _scrollDispatcher: ScrollDispatcher,\n private _viewportRuler: ViewportRuler,\n private _ngZone: NgZone,\n private _config?: RepositionScrollStrategyConfig) { }\n\n /** Attaches this scroll strategy to an overlay. */\n attach(overlayRef: OverlayRef ) {\n if (this._overlayRef) {\n throw getMatScrollStrategyAlreadyAttachedError();\n }\n\n this._overlayRef = overlayRef;\n }\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\n this._scrollSubscription = this._scrollDispatcher.scrolled(throttle).subscribe(() => {\n this._overlayRef.updatePosition();\n\n // TODO(crisbeto): make `close` on by default once all components can handle it.\n if (this._config && this._config.autoClose) {\n const overlayRect = this._overlayRef.overlayElement.getBoundingClientRect();\n const {width, height} = this._viewportRuler.getViewportSize();\n\n // TODO(crisbeto): include all ancestor scroll containers here once\n // we have a way of exposing the trigger element to the scroll strategy.\n const parentRects = [{width, height, bo ttom: height, right: width, top: 0, left: 0}];\n\n if (isElementScrolledOutsideView(overlayRect, parentRects)) {\n this.disable();\n this._ngZone.run(() => this._overlayRef.detach());\n }\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}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// TODO(jelbourn): move this to live with the rest of the scrolling code\n// TODO(jelbourn): someday replace this with IntersectionObservers\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 (fro m 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 */\nexport function isElementScrolledOutsideView(element: ClientRect, scrollContainers: ClientRect[]) {\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\n return outsideAbove || outsideBelow || outsideLeft || outsideRight;\n });\n}\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 */\nexport function isElementClippedByScrolling(element: ClientRect, scrollContainers: ClientRect[]) {\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\n return clippedAbove || clippedBelow || clippedLeft || clippedRight;\n });\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ScrollStrategy} from './scroll-strategy';\nimport {ViewportRuler} from '@angular/cdk/scrolling';\n\n/**\n * Strategy that will prevent the user from scrolling while the overlay is visible.\n */\nexport class BlockScrollStrategy im plements ScrollStrategy {\n private _previousHTMLStyles = { top: '', left: '' };\n private _previousScrollPosition: { top: number, left: number };\n private _isEnabled = false;\n private _document: Document;\n\n constructor(private _viewportRuler: ViewportRuler, document: any) {\n this._document = document;\n }\n\n /** Attaches this scroll strategy to an overlay. */\n attach() { }\n\n /** Blocks page-level scroll while the attached overlay is open. */\n enable() {\n if (this._canBeEnabled()) {\n const root = this._document.documentElement;\n\n this._previousScrollPosition = this._viewportRuler.getViewportScrollPosition();\n\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\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 = `${-this._previousScrollPosition.left}px`;\n root.style.top = `${-this._previousScrollPosition.top}px`;\n root.classList.add('cdk-global-scrollblock');\n this._isEnabled = true;\n }\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 previousHtmlScrollBehavior = html.style['scrollBehavior'] || '';\n const previousBodyScrollBehavior = body.style['scrollBehavior'] || '';\n\n this._isEnabled = false;\n\n html.style.left = this._previousHTMLStyles.left;\n html.style.top = this._previousHTMLStyles.top;\n html.classList.remove('cdk-global-scrollblock');\n\n // Disable user-defined smooth scrolling temporarily while we restore the scroll position.\n // See https://developer.mozilla.org/en-US/docs/Web/C SS/scroll-behavior\n html.style['scrollBehavior'] = body.style['scrollBehavior'] = 'auto';\n\n window.scroll(this._previousScrollPosition.left, this._previousScrollPosition.top);\n\n html.style['scrollBehavior'] = previousHtmlScrollBehavior;\n body.style['scrollBehavior'] = previousBodyScrollBehavior;\n }\n }\n\n private _canBeEnabled(): boolean {\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\n if (html.classList.contains('cdk-global-scrollblock') || this._isEnabled) {\n return false;\n }\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 * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {NgZone} from '@angular/core';\nimport {ScrollStrategy, getMatScrollStrategyAlreadyAttachedError} from './scroll-strategy';\nimport {OverlayRef} from '../overlay-ref';\nimport {Subscription} from 'rxjs/Subscription';\nimport {ScrollDispatcher, ViewportRuler} from '@angular/cdk/scrolling';\n\n/**\n * Config options for the CloseScrollStrategy.\n */\nexport interface CloseScrollStrategyConfig {\n /** Amount of pixels the user has to scroll before the overlay is closed. */\n threshold?: number;\n}\n\n/**\n * Strategy that will close the overlay as soon as the user starts scrolling.\n */\nexport class CloseScrollStrategy implements ScrollStrategy {\n private _scrollSubscription: Subscription|null = null;\n private _overlayRef: OverlayRef;\n private _initialScrollPosition: number;\n\n constructor(\n private _scrollDis patcher: ScrollDispatcher,\n private _ngZone: NgZone,\n private _viewportRuler: ViewportRuler,\n private _config?: CloseScrollStrategyConfig) {}\n\n /** Attaches this scroll strategy to an overlay. */\n attach(overlayRef: OverlayRef) {\n if (this._overlayRef) {\n throw getMatScrollStrategyAlreadyAttachedError();\n }\n\n this._overlayRef = overlayRef;\n }\n\n /** Enables the closing of the attached overlay on scroll. */\n enable() {\n if (this._scrollSubscription) {\n return;\n }\n\n const stream = this._scrollDispatcher.scrolled(0);\n\n if (this._config && this._config.threshold && this._config.threshold > 1) {\n this._initialScrollPosition = this._viewportRuler.getViewportScrollPosition().top;\n\n this._scrollSubscription = stream.subscribe(() => {\n const scrollPosition = this._viewportRuler.getViewportScrollPosition().top;\n\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\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\n /** Detaches the overlay ref and disables the scroll strategy. */\n private _detach = () => {\n this.disable();\n\n if (this._overlayRef.hasAttached()) {\n this._ngZone.run(() => this._overlayRef.detach());\n }\n }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {OverlayRef} from '../overlay-ref';\n\n/**\n * Describes a strategy that will be used by an overlay to handle sc roll events while it is open.\n */\nexport interface ScrollStrategy {\n /** Enable this scroll strategy (called when the attached overlay is attached to a portal). */\n enable: () => void;\n\n /** Disable this scroll strategy (called when the attached overlay is detached from a portal). */\n disable: () => void;\n\n /** Attaches this `ScrollStrategy` to an overlay. */\n attach: (overlayRef: OverlayRef) => void;\n}\n\n/**\n * Returns an error to be thrown when attempting to attach an already-attached scroll strategy.\n */\nexport function getMatScrollStrategyAlreadyAttachedError(): Error {\n return Error(`Scroll strategy has already been attached.`);\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/** Horizontal dimension of a connection point on the perimeter of the origin or overlay element. */\nimport {Opti onal} from '@angular/core';\nexport type HorizontalConnectionPos = 'start' | 'center' | 'end';\n\n/** Vertical dimension of a connection point on the perimeter of the origin or overlay element. */\nexport type VerticalConnectionPos = 'top' | 'center' | 'bottom';\n\n\n/** A connection point on the origin element. */\nexport interface OriginConnectionPosition {\n originX: HorizontalConnectionPos;\n originY: VerticalConnectionPos;\n}\n\n/** A connection point on the overlay element. */\nexport interface OverlayConnectionPosition {\n overlayX: HorizontalConnectionPos;\n overlayY: VerticalConnectionPos;\n}\n\n/** The points of the origin element and the overlay element to connect. */\nexport class ConnectionPositionPair {\n /** X-axis attachment point for connected overlay origin. Can be 'start', 'end', or 'center'. */\n originX: HorizontalConnectionPos;\n /** Y-axis attachment point for connected overlay origin. Can be 'top', 'bottom', or 'center'. */\n originY: VerticalConnecti onPos;\n /** X-axis attachment point for connected overlay. Can be 'start', 'end', or 'center'. */\n overlayX: HorizontalConnectionPos;\n /** Y-axis attachment point for connected overlay. Can be 'top', 'bottom', or 'center'. */\n overlayY: VerticalConnectionPos;\n\n constructor(\n origin: OriginConnectionPosition,\n overlay: OverlayConnectionPosition,\n public offsetX?: number,\n public offsetY?: number) {\n\n this.originX = origin.originX;\n this.originY = origin.originY;\n this.overlayX = overlay.overlayX;\n this.overlayY = overlay.overlayY;\n }\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 overl ap 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 */\nexport class ScrollingVisibility {\n isOriginClipped: boolean;\n isOriginOutsideView: boolean;\n isOverlayClipped: boolean;\n isOverlayOutsideView: boolean;\n}\n\n/** The change event emitted by the strateg y when a fallback position is used. */\nexport class ConnectedOverlayPositionChange {\n constructor(\n /** The position used as a result of this change. */\n public connectionPair: ConnectionPositionPair,\n /** @docs-private */\n @Optional() public scrollableViewProperties: ScrollingVisibility) {}\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {PositionStrategy} from './position/position-strategy';\nimport {Direction} from '@angular/cdk/bidi';\nimport {ScrollStrategy} from './scroll/scroll-strategy';\nimport {NoopScrollStrategy} from './scroll/noop-scroll-strategy';\n\n\n/** Initial configuration used when creating an overlay. */\nexport class OverlayConfig {\n /** Strategy with which to position the overlay. */\n positionStrategy?: PositionStrategy;\n\n /** Strategy to be used when h andling scroll events while the overlay is open. */\n scrollStrategy?: ScrollStrategy = new NoopScrollStrategy();\n\n /** Custom class to add to the overlay pane. */\n panelClass?: string | string[] = '';\n\n /** Whether the overlay has a backdrop. */\n hasBackdrop?: boolean = false;\n\n /** Custom class to add to the backdrop */\n backdropClass?: string = 'cdk-overlay-dark-backdrop';\n\n /** The width of the overlay panel. If a number is provided, pixel units are assumed. */\n width?: number | string;\n\n /** The height of the overlay panel. If a number is provided, pixel units are assumed. */\n height?: number | string;\n\n /** The min-width of the overlay panel. If a number is provided, pixel units are assumed. */\n minWidth?: number | string;\n\n /** The min-height of the overlay panel. If a number is provided, pixel units are assumed. */\n minHeight?: number | string;\n\n /** The max-width of the overlay panel. If a number is provided, pixel units are assumed. * /\n maxWidth?: number | string;\n\n /** The max-height of the overlay panel. If a number is provided, pixel units are assumed. */\n maxHeight?: number | string;\n\n /** The direction of the text in the overlay panel. */\n direction?: Direction = 'ltr';\n\n constructor(config?: OverlayConfig) {\n if (config) {\n Object.keys(config)\n .filter(key => typeof config[key] !== 'undefined')\n .forEach(key => this[key] = config[key]);\n }\n }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ScrollStrategy} from './scroll-strategy';\n\n/** Scroll strategy that doesn't do anything. */\nexport class NoopScrollStrategy implements ScrollStrategy {\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"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;AqBWA,AAAA,MAAA,kBAAA,CAAA;;;;;IAEE,MAAM,GAAR,GAAc;;;;;IAEZ,OAAO,GAAT,GAAe;;;;;IAEb,MAAM,GAAR,GAAc;CACb;;;;;;;ADPD;;;AAIA,AAAA,MAAA,aAAA,CAAA;;;;IAqCE,WAAF,CAAc,MAAsB,EAApC;;;;QAhCA,IAAA,CAAA,cAAA,G
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