mirror of
https://github.com/biobulkbende/biobulkbende.org.git
synced 2024-12-27 05:15:25 +00:00
75 lines
2.7 KiB
JavaScript
75 lines
2.7 KiB
JavaScript
import { isNumeric } from '../util/isNumeric';
|
|
import { Observable } from '../Observable';
|
|
import { async } from '../scheduler/async';
|
|
/**
|
|
* We need this JSDoc comment for affecting ESDoc.
|
|
* @extends {Ignored}
|
|
* @hide true
|
|
*/
|
|
export class IntervalObservable extends Observable {
|
|
constructor(period = 0, scheduler = async) {
|
|
super();
|
|
this.period = period;
|
|
this.scheduler = scheduler;
|
|
if (!isNumeric(period) || period < 0) {
|
|
this.period = 0;
|
|
}
|
|
if (!scheduler || typeof scheduler.schedule !== 'function') {
|
|
this.scheduler = async;
|
|
}
|
|
}
|
|
/**
|
|
* Creates an Observable that emits sequential numbers every specified
|
|
* interval of time, on a specified IScheduler.
|
|
*
|
|
* <span class="informal">Emits incremental numbers periodically in time.
|
|
* </span>
|
|
*
|
|
* <img src="./img/interval.png" width="100%">
|
|
*
|
|
* `interval` returns an Observable that emits an infinite sequence of
|
|
* ascending integers, with a constant interval of time of your choosing
|
|
* between those emissions. The first emission is not sent immediately, but
|
|
* only after the first period has passed. By default, this operator uses the
|
|
* `async` IScheduler to provide a notion of time, but you may pass any
|
|
* IScheduler to it.
|
|
*
|
|
* @example <caption>Emits ascending numbers, one every second (1000ms)</caption>
|
|
* var numbers = Rx.Observable.interval(1000);
|
|
* numbers.subscribe(x => console.log(x));
|
|
*
|
|
* @see {@link timer}
|
|
* @see {@link delay}
|
|
*
|
|
* @param {number} [period=0] The interval size in milliseconds (by default)
|
|
* or the time unit determined by the scheduler's clock.
|
|
* @param {Scheduler} [scheduler=async] The IScheduler to use for scheduling
|
|
* the emission of values, and providing a notion of "time".
|
|
* @return {Observable} An Observable that emits a sequential number each time
|
|
* interval.
|
|
* @static true
|
|
* @name interval
|
|
* @owner Observable
|
|
*/
|
|
static create(period = 0, scheduler = async) {
|
|
return new IntervalObservable(period, scheduler);
|
|
}
|
|
static dispatch(state) {
|
|
const { index, subscriber, period } = state;
|
|
subscriber.next(index);
|
|
if (subscriber.closed) {
|
|
return;
|
|
}
|
|
state.index += 1;
|
|
this.schedule(state, period);
|
|
}
|
|
/** @deprecated internal use only */ _subscribe(subscriber) {
|
|
const index = 0;
|
|
const period = this.period;
|
|
const scheduler = this.scheduler;
|
|
subscriber.add(scheduler.schedule(IntervalObservable.dispatch, period, {
|
|
index, subscriber, period
|
|
}));
|
|
}
|
|
}
|
|
//# sourceMappingURL=IntervalObservable.js.map
|