@delon/abc
Version:
Common business components of ng-alain.
117 lines • 14.1 kB
JavaScript
import { Directive, ElementRef, EventEmitter, Injectable, NgModule, NgZone, Output, inject } from '@angular/core';
import { Observable, Subject } from 'rxjs';
import * as i0 from "@angular/core";
export class SizeObserver {
constructor() {
this._observedElements = new Map();
}
ngOnDestroy() {
this._observedElements.forEach((_, element) => this._cleanupObserver(element));
}
observe(element) {
return new Observable((observer) => {
const stream = this._observeElement(element);
const subscription = stream.subscribe(observer);
return () => {
subscription.unsubscribe();
this._unobserveElement(element);
};
});
}
_observeElement(element) {
if (!this._observedElements.has(element)) {
const stream = new Subject();
let observer = null;
if (typeof MutationObserver !== 'undefined') {
observer = new MutationObserver(mutations => stream.next(mutations));
observer.observe(element, {
attributes: true,
attributeOldValue: true,
attributeFilter: ['width', 'height', 'style']
});
}
this._observedElements.set(element, { observer, stream, count: 1 });
}
else {
this._observedElements.get(element).count++;
}
return this._observedElements.get(element).stream;
}
_unobserveElement(element) {
if (this._observedElements.has(element)) {
this._observedElements.get(element).count--;
if (!this._observedElements.get(element).count) {
this._cleanupObserver(element);
}
}
}
_cleanupObserver(element) {
if (this._observedElements.has(element)) {
const { observer, stream } = this._observedElements.get(element);
if (observer) {
observer.disconnect();
}
stream.complete();
this._observedElements.delete(element);
}
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.0.5", ngImport: i0, type: SizeObserver, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "18.0.5", ngImport: i0, type: SizeObserver, providedIn: 'root' }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.0.5", ngImport: i0, type: SizeObserver, decorators: [{
type: Injectable,
args: [{ providedIn: 'root' }]
}] });
export class ObserverSize {
constructor() {
this._obs = inject(SizeObserver);
this.el = inject(ElementRef).nativeElement;
this.ngZone = inject(NgZone);
this._sub$ = null;
this.event = new EventEmitter();
}
ngAfterViewInit() {
if (!this._sub$) {
this._sub();
}
}
_sub() {
this._unsub();
const stream = this._obs.observe(this.el);
this.ngZone.runOutsideAngular(() => {
this._sub$ = stream.subscribe(this.event);
});
}
_unsub() {
this._sub$?.unsubscribe();
}
ngOnDestroy() {
this._unsub();
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.0.5", ngImport: i0, type: ObserverSize, deps: [], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "18.0.5", type: ObserverSize, isStandalone: true, selector: "[observeSize]", outputs: { event: "observeSize" }, exportAs: ["observeSize"], ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.0.5", ngImport: i0, type: ObserverSize, decorators: [{
type: Directive,
args: [{
selector: '[observeSize]',
exportAs: 'observeSize',
standalone: true
}]
}], propDecorators: { event: [{
type: Output,
args: ['observeSize']
}] } });
export class ObserversModule {
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.0.5", ngImport: i0, type: ObserversModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule }); }
static { this.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "14.0.0", version: "18.0.5", ngImport: i0, type: ObserversModule, imports: [ObserverSize], exports: [ObserverSize] }); }
static { this.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "18.0.5", ngImport: i0, type: ObserversModule }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.0.5", ngImport: i0, type: ObserversModule, decorators: [{
type: NgModule,
args: [{
exports: [ObserverSize],
imports: [ObserverSize]
}]
}] });
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{\n  AfterViewInit,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Injectable,\n  NgModule,\n  NgZone,\n  OnDestroy,\n  Output,\n  inject\n} from '@angular/core';\nimport { Observable, Observer, Subject, Subscription } from 'rxjs';\n\n@Injectable({ providedIn: 'root' })\nexport class SizeObserver implements OnDestroy {\n  private _observedElements = new Map<\n    Element,\n    {\n      observer: MutationObserver | null;\n      readonly stream: Subject<MutationRecord[]>;\n      count: number;\n    }\n  >();\n\n  ngOnDestroy(): void {\n    this._observedElements.forEach((_, element) => this._cleanupObserver(element));\n  }\n\n  observe(element: Element): Observable<MutationRecord[]> {\n    return new Observable((observer: Observer<MutationRecord[]>) => {\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  private _observeElement(element: Element): Subject<MutationRecord[]> {\n    if (!this._observedElements.has(element)) {\n      const stream = new Subject<MutationRecord[]>();\n      let observer: MutationObserver | null = null;\n      if (typeof MutationObserver !== 'undefined') {\n        observer = new MutationObserver(mutations => stream.next(mutations));\n        observer.observe(element, {\n          attributes: true,\n          attributeOldValue: true,\n          attributeFilter: ['width', 'height', 'style']\n        });\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  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  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@Directive({\n  selector: '[observeSize]',\n  exportAs: 'observeSize',\n  standalone: true\n})\nexport class ObserverSize implements AfterViewInit, OnDestroy {\n  private readonly _obs = inject(SizeObserver);\n  private readonly el: HTMLElement = inject(ElementRef).nativeElement;\n  private readonly ngZone = inject(NgZone);\n\n  private _sub$: Subscription | null = null;\n  @Output('observeSize') readonly event = new EventEmitter<MutationRecord[]>();\n\n  ngAfterViewInit(): void {\n    if (!this._sub$) {\n      this._sub();\n    }\n  }\n\n  private _sub(): void {\n    this._unsub();\n    const stream = this._obs.observe(this.el);\n    this.ngZone.runOutsideAngular(() => {\n      this._sub$ = stream.subscribe(this.event);\n    });\n  }\n\n  private _unsub(): void {\n    this._sub$?.unsubscribe();\n  }\n\n  ngOnDestroy(): void {\n    this._unsub();\n  }\n}\n\n@NgModule({\n  exports: [ObserverSize],\n  imports: [ObserverSize]\n})\nexport class ObserversModule {}\n"]}