88 lines
3.5 KiB
JavaScript
88 lines
3.5 KiB
JavaScript
"use strict";
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var __extends = (this && this.__extends) || function (d, b) {
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for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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var isNumeric_1 = require('../util/isNumeric');
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var Observable_1 = require('../Observable');
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var async_1 = require('../scheduler/async');
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/**
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* We need this JSDoc comment for affecting ESDoc.
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* @extends {Ignored}
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* @hide true
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*/
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var IntervalObservable = (function (_super) {
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__extends(IntervalObservable, _super);
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function IntervalObservable(period, scheduler) {
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if (period === void 0) { period = 0; }
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if (scheduler === void 0) { scheduler = async_1.async; }
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_super.call(this);
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this.period = period;
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this.scheduler = scheduler;
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if (!isNumeric_1.isNumeric(period) || period < 0) {
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this.period = 0;
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}
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if (!scheduler || typeof scheduler.schedule !== 'function') {
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this.scheduler = async_1.async;
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}
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}
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/**
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* Creates an Observable that emits sequential numbers every specified
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* interval of time, on a specified IScheduler.
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*
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* <span class="informal">Emits incremental numbers periodically in time.
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* </span>
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*
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* <img src="./img/interval.png" width="100%">
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*
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* `interval` returns an Observable that emits an infinite sequence of
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* ascending integers, with a constant interval of time of your choosing
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* between those emissions. The first emission is not sent immediately, but
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* only after the first period has passed. By default, this operator uses the
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* `async` IScheduler to provide a notion of time, but you may pass any
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* IScheduler to it.
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*
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* @example <caption>Emits ascending numbers, one every second (1000ms)</caption>
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* var numbers = Rx.Observable.interval(1000);
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* numbers.subscribe(x => console.log(x));
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*
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* @see {@link timer}
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* @see {@link delay}
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*
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* @param {number} [period=0] The interval size in milliseconds (by default)
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* or the time unit determined by the scheduler's clock.
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* @param {Scheduler} [scheduler=async] The IScheduler to use for scheduling
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* the emission of values, and providing a notion of "time".
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* @return {Observable} An Observable that emits a sequential number each time
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* interval.
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* @static true
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* @name interval
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* @owner Observable
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*/
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IntervalObservable.create = function (period, scheduler) {
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if (period === void 0) { period = 0; }
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if (scheduler === void 0) { scheduler = async_1.async; }
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return new IntervalObservable(period, scheduler);
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};
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IntervalObservable.dispatch = function (state) {
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var index = state.index, subscriber = state.subscriber, period = state.period;
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subscriber.next(index);
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if (subscriber.closed) {
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return;
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}
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state.index += 1;
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this.schedule(state, period);
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};
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/** @deprecated internal use only */ IntervalObservable.prototype._subscribe = function (subscriber) {
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var index = 0;
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var period = this.period;
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var scheduler = this.scheduler;
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subscriber.add(scheduler.schedule(IntervalObservable.dispatch, period, {
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index: index, subscriber: subscriber, period: period
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}));
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};
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return IntervalObservable;
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}(Observable_1.Observable));
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exports.IntervalObservable = IntervalObservable;
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//# sourceMappingURL=IntervalObservable.js.map
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