ng-zorro-antd/fesm2020/ng-zorro-antd-cdk-resize-observer.mjs.map

An enterprise-class UI components based on Ant Design and Angular

{"version":3,"file":"ng-zorro-antd-cdk-resize-observer.mjs","sources":["../../components/cdk/resize-observer/resize-observer.service.ts","../../components/cdk/resize-observer/resize-observer.directive.ts","../../components/cdk/resize-observer/resize-observer.module.ts","../../components/cdk/resize-observer/public-api.ts","../../components/cdk/resize-observer/ng-zorro-antd-cdk-resize-observer.ts"],"sourcesContent":["/**\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE\n */\n\nimport { coerceElement } from '@angular/cdk/coercion';\nimport { ElementRef, Injectable, OnDestroy } from '@angular/core';\nimport { Observable, Observer, Subject } from 'rxjs';\n\n/**\n * Factory that creates a new ResizeObserver and allows us to stub it out in unit tests.\n */\n@Injectable({ providedIn: 'root' })\nexport class NzResizeObserverFactory {\n  create(callback: ResizeObserverCallback): ResizeObserver | null {\n    return typeof ResizeObserver === 'undefined' ? null : new ResizeObserver(callback);\n  }\n}\n\n/** An injectable service that allows watching elements for changes to their content. */\n@Injectable({ providedIn: 'root' })\nexport class NzResizeObserver implements OnDestroy {\n  /** Keeps track of the existing ResizeObservers so they can be reused. */\n  private observedElements = new Map<\n    Element,\n    {\n      observer: ResizeObserver | null;\n      stream: Subject<ResizeObserverEntry[]>;\n      count: number;\n    }\n  >();\n\n  constructor(private nzResizeObserverFactory: NzResizeObserverFactory) {}\n\n  ngOnDestroy(): void {\n    this.observedElements.forEach((_, element) => this.cleanupObserver(element));\n  }\n\n  observe(elementOrRef: Element | ElementRef<Element>): Observable<ResizeObserverEntry[]> {\n    const element = coerceElement(elementOrRef);\n\n    return new Observable((observer: Observer<ResizeObserverEntry[]>) => {\n      const stream = this.observeElement(element);\n      const subscription = stream.subscribe(observer);\n\n      return () => {\n        subscription.unsubscribe();\n        this.unobserveElement(element);\n      };\n    });\n  }\n\n  /**\n   * Observes the given element by using the existing ResizeObserver if available, or creating a\n   * new one if not.\n   */\n  private observeElement(element: Element): Subject<ResizeObserverEntry[]> {\n    if (!this.observedElements.has(element)) {\n      const stream = new Subject<ResizeObserverEntry[]>();\n      const observer = this.nzResizeObserverFactory.create((mutations: ResizeObserverEntry[]) =>\n        stream.next(mutations)\n      );\n      if (observer) {\n        observer.observe(element);\n      }\n      this.observedElements.set(element, { observer, stream, count: 1 });\n    } else {\n      this.observedElements.get(element)!.count++;\n    }\n    return this.observedElements.get(element)!.stream;\n  }\n\n  /**\n   * Un-observes the given element and cleans up the underlying ResizeObserver if nobody else is\n   * observing this element.\n   */\n  private unobserveElement(element: Element): void {\n    if (this.observedElements.has(element)) {\n      this.observedElements.get(element)!.count--;\n      if (!this.observedElements.get(element)!.count) {\n        this.cleanupObserver(element);\n      }\n    }\n  }\n\n  /** Clean up the underlying ResizeObserver for the specified element. */\n  private cleanupObserver(element: Element): void {\n    if (this.observedElements.has(element)) {\n      const { observer, stream } = this.observedElements.get(element)!;\n      if (observer) {\n        observer.disconnect();\n      }\n      stream.complete();\n      this.observedElements.delete(element);\n    }\n  }\n}\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://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE\n */\n\nimport {\n  AfterContentInit,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Input,\n  OnChanges,\n  OnDestroy,\n  Output,\n  SimpleChanges\n} from '@angular/core';\nimport { Subscription } from 'rxjs';\n\nimport { BooleanInput } from 'ng-zorro-antd/core/types';\nimport { InputBoolean } from 'ng-zorro-antd/core/util';\n\nimport { NzResizeObserver } from './resize-observer.service';\n\n@Directive({\n  selector: '[nzResizeObserver]'\n})\nexport class NzResizeObserverDirective implements AfterContentInit, OnDestroy, OnChanges {\n  static ngAcceptInputType_nzResizeObserverDisabled: BooleanInput;\n  @Output() readonly nzResizeObserve = new EventEmitter<ResizeObserverEntry[]>();\n  @Input() @InputBoolean() nzResizeObserverDisabled = false;\n  private currentSubscription: Subscription | null = null;\n\n  private subscribe(): void {\n    this.unsubscribe();\n    this.currentSubscription = this.nzResizeObserver.observe(this.elementRef).subscribe(this.nzResizeObserve);\n  }\n\n  private unsubscribe(): void {\n    this.currentSubscription?.unsubscribe();\n  }\n\n  constructor(private nzResizeObserver: NzResizeObserver, private elementRef: ElementRef<HTMLElement>) {}\n\n  ngAfterContentInit(): void {\n    if (!this.currentSubscription && !this.nzResizeObserverDisabled) {\n      this.subscribe();\n    }\n  }\n\n  ngOnDestroy(): void {\n    this.unsubscribe();\n  }\n\n  ngOnChanges(changes: SimpleChanges): void {\n    const { nzResizeObserve } = changes;\n    if (nzResizeObserve) {\n      if (this.nzResizeObserverDisabled) {\n        this.unsubscribe();\n      } else {\n        this.subscribe();\n      }\n    }\n  }\n}\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://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE\n */\n\nimport { NgModule } from '@angular/core';\n\nimport { NzResizeObserverDirective } from './resize-observer.directive';\nimport { NzResizeObserverFactory } from './resize-observer.service';\n\n@NgModule({\n  providers: [NzResizeObserverFactory],\n  declarations: [NzResizeObserverDirective],\n  exports: [NzResizeObserverDirective]\n})\nexport class NzResizeObserverModule {}\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://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE\n */\n\nexport { NzResizeObserverModule } from './resize-observer.module';\nexport { NzResizeObserverDirective } from './resize-observer.directive';\nexport { NzResizeObserver, NzResizeObserverFactory } from './resize-observer.service';\n","/**\n * Generated bundle index. 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