@angular/core
Version:
Angular - the core framework
57 lines • 5.79 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { BehaviorSubject } from 'rxjs';
import { Injectable } from './di';
import * as i0 from "./r3_symbols";
/**
* *Internal* service that keeps track of pending tasks happening in the system.
*
* This information is needed to make sure that the serialization on the server
* is delayed until all tasks in the queue (such as an initial navigation or a
* pending HTTP request) are completed.
*
* Pending tasks continue to contribute to the stableness of `ApplicationRef`
* throughout the lifetime of the application.
*/
export class PendingTasks {
constructor() {
this.taskId = 0;
this.pendingTasks = new Set();
this.hasPendingTasks = new BehaviorSubject(false);
}
get _hasPendingTasks() {
return this.hasPendingTasks.value;
}
add() {
if (!this._hasPendingTasks) {
this.hasPendingTasks.next(true);
}
const taskId = this.taskId++;
this.pendingTasks.add(taskId);
return taskId;
}
remove(taskId) {
this.pendingTasks.delete(taskId);
if (this.pendingTasks.size === 0 && this._hasPendingTasks) {
this.hasPendingTasks.next(false);
}
}
ngOnDestroy() {
this.pendingTasks.clear();
if (this._hasPendingTasks) {
this.hasPendingTasks.next(false);
}
}
static { this.ɵfac = function PendingTasks_Factory(t) { return new (t || PendingTasks)(); }; }
static { this.ɵprov = /*@__PURE__*/ i0.ɵɵdefineInjectable({ token: PendingTasks, factory: PendingTasks.ɵfac, providedIn: 'root' }); }
}
(() => { (typeof ngDevMode === "undefined" || ngDevMode) && i0.setClassMetadata(PendingTasks, [{
type: Injectable,
args: [{ providedIn: 'root' }]
}], null, null); })();
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