153 lines
4.2 KiB
JavaScript
153 lines
4.2 KiB
JavaScript
import { Observable } from './Observable';
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import { Subscriber } from './Subscriber';
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import { Subscription } from './Subscription';
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import { ObjectUnsubscribedError } from './util/ObjectUnsubscribedError';
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import { SubjectSubscription } from './SubjectSubscription';
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import { rxSubscriber as rxSubscriberSymbol } from './symbol/rxSubscriber';
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/**
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* @class SubjectSubscriber<T>
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*/
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export class SubjectSubscriber extends Subscriber {
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constructor(destination) {
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super(destination);
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this.destination = destination;
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}
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}
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/**
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* @class Subject<T>
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*/
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export class Subject extends Observable {
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constructor() {
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super();
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this.observers = [];
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this.closed = false;
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this.isStopped = false;
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this.hasError = false;
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this.thrownError = null;
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}
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[rxSubscriberSymbol]() {
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return new SubjectSubscriber(this);
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}
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lift(operator) {
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const subject = new AnonymousSubject(this, this);
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subject.operator = operator;
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return subject;
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}
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next(value) {
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if (this.closed) {
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throw new ObjectUnsubscribedError();
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}
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if (!this.isStopped) {
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const { observers } = this;
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const len = observers.length;
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const copy = observers.slice();
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for (let i = 0; i < len; i++) {
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copy[i].next(value);
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}
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}
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}
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error(err) {
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if (this.closed) {
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throw new ObjectUnsubscribedError();
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}
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this.hasError = true;
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this.thrownError = err;
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this.isStopped = true;
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const { observers } = this;
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const len = observers.length;
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const copy = observers.slice();
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for (let i = 0; i < len; i++) {
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copy[i].error(err);
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}
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this.observers.length = 0;
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}
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complete() {
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if (this.closed) {
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throw new ObjectUnsubscribedError();
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}
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this.isStopped = true;
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const { observers } = this;
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const len = observers.length;
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const copy = observers.slice();
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for (let i = 0; i < len; i++) {
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copy[i].complete();
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}
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this.observers.length = 0;
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}
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unsubscribe() {
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this.isStopped = true;
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this.closed = true;
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this.observers = null;
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}
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_trySubscribe(subscriber) {
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if (this.closed) {
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throw new ObjectUnsubscribedError();
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}
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else {
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return super._trySubscribe(subscriber);
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}
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}
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/** @deprecated internal use only */ _subscribe(subscriber) {
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if (this.closed) {
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throw new ObjectUnsubscribedError();
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}
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else if (this.hasError) {
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subscriber.error(this.thrownError);
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return Subscription.EMPTY;
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}
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else if (this.isStopped) {
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subscriber.complete();
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return Subscription.EMPTY;
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}
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else {
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this.observers.push(subscriber);
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return new SubjectSubscription(this, subscriber);
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}
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}
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asObservable() {
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const observable = new Observable();
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observable.source = this;
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return observable;
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}
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}
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Subject.create = (destination, source) => {
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return new AnonymousSubject(destination, source);
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};
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/**
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* @class AnonymousSubject<T>
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*/
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export class AnonymousSubject extends Subject {
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constructor(destination, source) {
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super();
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this.destination = destination;
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this.source = source;
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}
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next(value) {
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const { destination } = this;
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if (destination && destination.next) {
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destination.next(value);
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}
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}
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error(err) {
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const { destination } = this;
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if (destination && destination.error) {
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this.destination.error(err);
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}
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}
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complete() {
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const { destination } = this;
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if (destination && destination.complete) {
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this.destination.complete();
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}
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}
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/** @deprecated internal use only */ _subscribe(subscriber) {
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const { source } = this;
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if (source) {
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return this.source.subscribe(subscriber);
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}
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else {
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return Subscription.EMPTY;
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}
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}
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}
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//# sourceMappingURL=Subject.js.map
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