109 lines
3.7 KiB
JavaScript
109 lines
3.7 KiB
JavaScript
import { Observable } from '../Observable';
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import { ScalarObservable } from './ScalarObservable';
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import { EmptyObservable } from './EmptyObservable';
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import { isScheduler } from '../util/isScheduler';
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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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export class ArrayObservable extends Observable {
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constructor(array, scheduler) {
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super();
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this.array = array;
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this.scheduler = scheduler;
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if (!scheduler && array.length === 1) {
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this._isScalar = true;
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this.value = array[0];
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}
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}
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static create(array, scheduler) {
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return new ArrayObservable(array, scheduler);
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}
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/**
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* Creates an Observable that emits some values you specify as arguments,
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* immediately one after the other, and then emits a complete notification.
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*
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* <span class="informal">Emits the arguments you provide, then completes.
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* </span>
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*
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* <img src="./img/of.png" width="100%">
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*
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* This static operator is useful for creating a simple Observable that only
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* emits the arguments given, and the complete notification thereafter. It can
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* be used for composing with other Observables, such as with {@link concat}.
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* By default, it uses a `null` IScheduler, which means the `next`
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* notifications are sent synchronously, although with a different IScheduler
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* it is possible to determine when those notifications will be delivered.
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*
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* @example <caption>Emit 10, 20, 30, then 'a', 'b', 'c', then start ticking every second.</caption>
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* var numbers = Rx.Observable.of(10, 20, 30);
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* var letters = Rx.Observable.of('a', 'b', 'c');
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* var interval = Rx.Observable.interval(1000);
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* var result = numbers.concat(letters).concat(interval);
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* result.subscribe(x => console.log(x));
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*
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* @see {@link create}
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* @see {@link empty}
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* @see {@link never}
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* @see {@link throw}
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*
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* @param {...T} values Arguments that represent `next` values to be emitted.
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* @param {Scheduler} [scheduler] A {@link IScheduler} to use for scheduling
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* the emissions of the `next` notifications.
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* @return {Observable<T>} An Observable that emits each given input value.
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* @static true
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* @name of
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* @owner Observable
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*/
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static of(...array) {
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let scheduler = array[array.length - 1];
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if (isScheduler(scheduler)) {
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array.pop();
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}
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else {
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scheduler = null;
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}
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const len = array.length;
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if (len > 1) {
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return new ArrayObservable(array, scheduler);
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}
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else if (len === 1) {
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return new ScalarObservable(array[0], scheduler);
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}
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else {
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return new EmptyObservable(scheduler);
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}
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}
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static dispatch(state) {
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const { array, index, count, subscriber } = state;
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if (index >= count) {
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subscriber.complete();
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return;
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}
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subscriber.next(array[index]);
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if (subscriber.closed) {
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return;
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}
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state.index = index + 1;
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this.schedule(state);
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}
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/** @deprecated internal use only */ _subscribe(subscriber) {
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let index = 0;
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const array = this.array;
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const count = array.length;
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const scheduler = this.scheduler;
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if (scheduler) {
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return scheduler.schedule(ArrayObservable.dispatch, 0, {
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array, index, count, subscriber
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});
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}
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else {
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for (let i = 0; i < count && !subscriber.closed; i++) {
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subscriber.next(array[i]);
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}
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subscriber.complete();
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}
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}
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}
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//# sourceMappingURL=ArrayObservable.js.map
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