61 lines
1.9 KiB
JavaScript
61 lines
1.9 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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/**
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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 ArrayLikeObservable extends Observable {
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constructor(arrayLike, scheduler) {
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super();
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this.arrayLike = arrayLike;
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this.scheduler = scheduler;
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if (!scheduler && arrayLike.length === 1) {
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this._isScalar = true;
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this.value = arrayLike[0];
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}
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}
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static create(arrayLike, scheduler) {
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const length = arrayLike.length;
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if (length === 0) {
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return new EmptyObservable();
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}
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else if (length === 1) {
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return new ScalarObservable(arrayLike[0], scheduler);
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}
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else {
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return new ArrayLikeObservable(arrayLike, scheduler);
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}
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}
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static dispatch(state) {
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const { arrayLike, index, length, subscriber } = state;
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if (subscriber.closed) {
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return;
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}
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if (index >= length) {
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subscriber.complete();
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return;
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}
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subscriber.next(arrayLike[index]);
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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 { arrayLike, scheduler } = this;
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const length = arrayLike.length;
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if (scheduler) {
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return scheduler.schedule(ArrayLikeObservable.dispatch, 0, {
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arrayLike, index, length, subscriber
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});
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}
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else {
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for (let i = 0; i < length && !subscriber.closed; i++) {
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subscriber.next(arrayLike[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=ArrayLikeObservable.js.map
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