144 lines
No EOL
4 KiB
JavaScript
144 lines
No EOL
4 KiB
JavaScript
import { Observable } from './Observable';
|
|
import { Subscriber } from './Subscriber';
|
|
import { Subscription } from './Subscription';
|
|
import { ObjectUnsubscribedError } from './util/ObjectUnsubscribedError';
|
|
import { SubjectSubscription } from './SubjectSubscription';
|
|
import { rxSubscriber as rxSubscriberSymbol } from '../internal/symbol/rxSubscriber';
|
|
export class SubjectSubscriber extends Subscriber {
|
|
constructor(destination) {
|
|
super(destination);
|
|
this.destination = destination;
|
|
}
|
|
}
|
|
export class Subject extends Observable {
|
|
constructor() {
|
|
super();
|
|
this.observers = [];
|
|
this.closed = false;
|
|
this.isStopped = false;
|
|
this.hasError = false;
|
|
this.thrownError = null;
|
|
}
|
|
[rxSubscriberSymbol]() {
|
|
return new SubjectSubscriber(this);
|
|
}
|
|
lift(operator) {
|
|
const subject = new AnonymousSubject(this, this);
|
|
subject.operator = operator;
|
|
return subject;
|
|
}
|
|
next(value) {
|
|
if (this.closed) {
|
|
throw new ObjectUnsubscribedError();
|
|
}
|
|
if (!this.isStopped) {
|
|
const { observers } = this;
|
|
const len = observers.length;
|
|
const copy = observers.slice();
|
|
for (let i = 0; i < len; i++) {
|
|
copy[i].next(value);
|
|
}
|
|
}
|
|
}
|
|
error(err) {
|
|
if (this.closed) {
|
|
throw new ObjectUnsubscribedError();
|
|
}
|
|
this.hasError = true;
|
|
this.thrownError = err;
|
|
this.isStopped = true;
|
|
const { observers } = this;
|
|
const len = observers.length;
|
|
const copy = observers.slice();
|
|
for (let i = 0; i < len; i++) {
|
|
copy[i].error(err);
|
|
}
|
|
this.observers.length = 0;
|
|
}
|
|
complete() {
|
|
if (this.closed) {
|
|
throw new ObjectUnsubscribedError();
|
|
}
|
|
this.isStopped = true;
|
|
const { observers } = this;
|
|
const len = observers.length;
|
|
const copy = observers.slice();
|
|
for (let i = 0; i < len; i++) {
|
|
copy[i].complete();
|
|
}
|
|
this.observers.length = 0;
|
|
}
|
|
unsubscribe() {
|
|
this.isStopped = true;
|
|
this.closed = true;
|
|
this.observers = null;
|
|
}
|
|
_trySubscribe(subscriber) {
|
|
if (this.closed) {
|
|
throw new ObjectUnsubscribedError();
|
|
}
|
|
else {
|
|
return super._trySubscribe(subscriber);
|
|
}
|
|
}
|
|
_subscribe(subscriber) {
|
|
if (this.closed) {
|
|
throw new ObjectUnsubscribedError();
|
|
}
|
|
else if (this.hasError) {
|
|
subscriber.error(this.thrownError);
|
|
return Subscription.EMPTY;
|
|
}
|
|
else if (this.isStopped) {
|
|
subscriber.complete();
|
|
return Subscription.EMPTY;
|
|
}
|
|
else {
|
|
this.observers.push(subscriber);
|
|
return new SubjectSubscription(this, subscriber);
|
|
}
|
|
}
|
|
asObservable() {
|
|
const observable = new Observable();
|
|
observable.source = this;
|
|
return observable;
|
|
}
|
|
}
|
|
Subject.create = (destination, source) => {
|
|
return new AnonymousSubject(destination, source);
|
|
};
|
|
export class AnonymousSubject extends Subject {
|
|
constructor(destination, source) {
|
|
super();
|
|
this.destination = destination;
|
|
this.source = source;
|
|
}
|
|
next(value) {
|
|
const { destination } = this;
|
|
if (destination && destination.next) {
|
|
destination.next(value);
|
|
}
|
|
}
|
|
error(err) {
|
|
const { destination } = this;
|
|
if (destination && destination.error) {
|
|
this.destination.error(err);
|
|
}
|
|
}
|
|
complete() {
|
|
const { destination } = this;
|
|
if (destination && destination.complete) {
|
|
this.destination.complete();
|
|
}
|
|
}
|
|
_subscribe(subscriber) {
|
|
const { source } = this;
|
|
if (source) {
|
|
return this.source.subscribe(subscriber);
|
|
}
|
|
else {
|
|
return Subscription.EMPTY;
|
|
}
|
|
}
|
|
}
|
|
//# sourceMappingURL=Subject.js.map
|