107 lines
4.4 KiB
JavaScript
107 lines
4.4 KiB
JavaScript
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"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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var isScheduler_1 = require('../util/isScheduler');
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var isDate_1 = require('../util/isDate');
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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 TimerObservable = (function (_super) {
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__extends(TimerObservable, _super);
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function TimerObservable(dueTime, period, scheduler) {
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if (dueTime === void 0) { dueTime = 0; }
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_super.call(this);
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this.period = -1;
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this.dueTime = 0;
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if (isNumeric_1.isNumeric(period)) {
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this.period = Number(period) < 1 && 1 || Number(period);
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}
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else if (isScheduler_1.isScheduler(period)) {
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scheduler = period;
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}
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if (!isScheduler_1.isScheduler(scheduler)) {
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scheduler = async_1.async;
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}
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this.scheduler = scheduler;
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this.dueTime = isDate_1.isDate(dueTime) ?
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(+dueTime - this.scheduler.now()) :
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dueTime;
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}
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/**
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* Creates an Observable that starts emitting after an `initialDelay` and
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* emits ever increasing numbers after each `period` of time thereafter.
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*
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* <span class="informal">Its like {@link interval}, but you can specify when
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* should the emissions start.</span>
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*
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* <img src="./img/timer.png" width="100%">
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*
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* `timer` returns an Observable that emits an infinite sequence of ascending
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* integers, with a constant interval of time, `period` of your choosing
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* between those emissions. The first emission happens after the specified
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* `initialDelay`. The initial delay may be a {@link Date}. By default, this
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* operator uses the `async` IScheduler to provide a notion of time, but you
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* may pass any IScheduler to it. If `period` is not specified, the output
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* Observable emits only one value, `0`. Otherwise, it emits an infinite
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* sequence.
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*
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* @example <caption>Emits ascending numbers, one every second (1000ms), starting after 3 seconds</caption>
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* var numbers = Rx.Observable.timer(3000, 1000);
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* numbers.subscribe(x => console.log(x));
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*
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* @example <caption>Emits one number after five seconds</caption>
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* var numbers = Rx.Observable.timer(5000);
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* numbers.subscribe(x => console.log(x));
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*
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* @see {@link interval}
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* @see {@link delay}
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*
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* @param {number|Date} initialDelay The initial delay time to wait before
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* emitting the first value of `0`.
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* @param {number} [period] The period of time between emissions of the
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* subsequent numbers.
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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 `0` after the
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* `initialDelay` and ever increasing numbers after each `period` of time
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* thereafter.
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* @static true
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* @name timer
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* @owner Observable
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*/
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TimerObservable.create = function (initialDelay, period, scheduler) {
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if (initialDelay === void 0) { initialDelay = 0; }
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return new TimerObservable(initialDelay, period, scheduler);
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};
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TimerObservable.dispatch = function (state) {
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var index = state.index, period = state.period, subscriber = state.subscriber;
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var action = this;
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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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else if (period === -1) {
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return subscriber.complete();
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}
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state.index = index + 1;
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action.schedule(state, period);
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};
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/** @deprecated internal use only */ TimerObservable.prototype._subscribe = function (subscriber) {
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var index = 0;
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var _a = this, period = _a.period, dueTime = _a.dueTime, scheduler = _a.scheduler;
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return scheduler.schedule(TimerObservable.dispatch, dueTime, {
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index: index, period: period, subscriber: subscriber
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});
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};
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return TimerObservable;
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}(Observable_1.Observable));
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exports.TimerObservable = TimerObservable;
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//# sourceMappingURL=TimerObservable.js.map
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