127 lines
No EOL
4.1 KiB
JavaScript
127 lines
No EOL
4.1 KiB
JavaScript
import { SubjectSubscriber } from '../Subject';
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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 { refCount as higherOrderRefCount } from '../operators/refCount';
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export class ConnectableObservable extends Observable {
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constructor(source, subjectFactory) {
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super();
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this.source = source;
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this.subjectFactory = subjectFactory;
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this._refCount = 0;
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this._isComplete = false;
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}
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_subscribe(subscriber) {
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return this.getSubject().subscribe(subscriber);
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}
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getSubject() {
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const subject = this._subject;
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if (!subject || subject.isStopped) {
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this._subject = this.subjectFactory();
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}
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return this._subject;
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}
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connect() {
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let connection = this._connection;
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if (!connection) {
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this._isComplete = false;
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connection = this._connection = new Subscription();
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connection.add(this.source
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.subscribe(new ConnectableSubscriber(this.getSubject(), this)));
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if (connection.closed) {
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this._connection = null;
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connection = Subscription.EMPTY;
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}
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}
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return connection;
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}
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refCount() {
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return higherOrderRefCount()(this);
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}
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}
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const connectableProto = ConnectableObservable.prototype;
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export const connectableObservableDescriptor = {
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operator: { value: null },
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_refCount: { value: 0, writable: true },
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_subject: { value: null, writable: true },
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_connection: { value: null, writable: true },
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_subscribe: { value: connectableProto._subscribe },
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_isComplete: { value: connectableProto._isComplete, writable: true },
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getSubject: { value: connectableProto.getSubject },
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connect: { value: connectableProto.connect },
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refCount: { value: connectableProto.refCount }
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};
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class ConnectableSubscriber extends SubjectSubscriber {
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constructor(destination, connectable) {
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super(destination);
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this.connectable = connectable;
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}
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_error(err) {
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this._unsubscribe();
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super._error(err);
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}
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_complete() {
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this.connectable._isComplete = true;
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this._unsubscribe();
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super._complete();
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}
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_unsubscribe() {
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const connectable = this.connectable;
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if (connectable) {
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this.connectable = null;
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const connection = connectable._connection;
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connectable._refCount = 0;
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connectable._subject = null;
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connectable._connection = null;
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if (connection) {
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connection.unsubscribe();
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}
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}
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}
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}
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class RefCountOperator {
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constructor(connectable) {
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this.connectable = connectable;
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}
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call(subscriber, source) {
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const { connectable } = this;
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connectable._refCount++;
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const refCounter = new RefCountSubscriber(subscriber, connectable);
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const subscription = source.subscribe(refCounter);
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if (!refCounter.closed) {
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refCounter.connection = connectable.connect();
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}
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return subscription;
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}
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}
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class RefCountSubscriber extends Subscriber {
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constructor(destination, connectable) {
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super(destination);
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this.connectable = connectable;
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}
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_unsubscribe() {
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const { connectable } = this;
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if (!connectable) {
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this.connection = null;
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return;
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}
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this.connectable = null;
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const refCount = connectable._refCount;
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if (refCount <= 0) {
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this.connection = null;
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return;
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}
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connectable._refCount = refCount - 1;
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if (refCount > 1) {
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this.connection = null;
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return;
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}
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const { connection } = this;
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const sharedConnection = connectable._connection;
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this.connection = null;
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if (sharedConnection && (!connection || sharedConnection === connection)) {
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sharedConnection.unsubscribe();
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}
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}
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}
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//# sourceMappingURL=ConnectableObservable.js.map
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