| import { SubjectSubscriber } from '../Subject'; |
| import { Observable } from '../Observable'; |
| import { Subscriber } from '../Subscriber'; |
| import { Subscription } from '../Subscription'; |
| import { refCount as higherOrderRefCount } from '../operators/refCount'; |
| export class ConnectableObservable extends Observable { |
| constructor(source, subjectFactory) { |
| super(); |
| this.source = source; |
| this.subjectFactory = subjectFactory; |
| this._refCount = 0; |
| this._isComplete = false; |
| } |
| _subscribe(subscriber) { |
| return this.getSubject().subscribe(subscriber); |
| } |
| getSubject() { |
| const subject = this._subject; |
| if (!subject || subject.isStopped) { |
| this._subject = this.subjectFactory(); |
| } |
| return this._subject; |
| } |
| connect() { |
| let connection = this._connection; |
| if (!connection) { |
| this._isComplete = false; |
| connection = this._connection = new Subscription(); |
| connection.add(this.source |
| .subscribe(new ConnectableSubscriber(this.getSubject(), this))); |
| if (connection.closed) { |
| this._connection = null; |
| connection = Subscription.EMPTY; |
| } |
| } |
| return connection; |
| } |
| refCount() { |
| return higherOrderRefCount()(this); |
| } |
| } |
| export const connectableObservableDescriptor = (() => { |
| const connectableProto = ConnectableObservable.prototype; |
| return { |
| operator: { value: null }, |
| _refCount: { value: 0, writable: true }, |
| _subject: { value: null, writable: true }, |
| _connection: { value: null, writable: true }, |
| _subscribe: { value: connectableProto._subscribe }, |
| _isComplete: { value: connectableProto._isComplete, writable: true }, |
| getSubject: { value: connectableProto.getSubject }, |
| connect: { value: connectableProto.connect }, |
| refCount: { value: connectableProto.refCount } |
| }; |
| })(); |
| class ConnectableSubscriber extends SubjectSubscriber { |
| constructor(destination, connectable) { |
| super(destination); |
| this.connectable = connectable; |
| } |
| _error(err) { |
| this._unsubscribe(); |
| super._error(err); |
| } |
| _complete() { |
| this.connectable._isComplete = true; |
| this._unsubscribe(); |
| super._complete(); |
| } |
| _unsubscribe() { |
| const connectable = this.connectable; |
| if (connectable) { |
| this.connectable = null; |
| const connection = connectable._connection; |
| connectable._refCount = 0; |
| connectable._subject = null; |
| connectable._connection = null; |
| if (connection) { |
| connection.unsubscribe(); |
| } |
| } |
| } |
| } |
| class RefCountOperator { |
| constructor(connectable) { |
| this.connectable = connectable; |
| } |
| call(subscriber, source) { |
| const { connectable } = this; |
| connectable._refCount++; |
| const refCounter = new RefCountSubscriber(subscriber, connectable); |
| const subscription = source.subscribe(refCounter); |
| if (!refCounter.closed) { |
| refCounter.connection = connectable.connect(); |
| } |
| return subscription; |
| } |
| } |
| class RefCountSubscriber extends Subscriber { |
| constructor(destination, connectable) { |
| super(destination); |
| this.connectable = connectable; |
| } |
| _unsubscribe() { |
| const { connectable } = this; |
| if (!connectable) { |
| this.connection = null; |
| return; |
| } |
| this.connectable = null; |
| const refCount = connectable._refCount; |
| if (refCount <= 0) { |
| this.connection = null; |
| return; |
| } |
| connectable._refCount = refCount - 1; |
| if (refCount > 1) { |
| this.connection = null; |
| return; |
| } |
| const { connection } = this; |
| const sharedConnection = connectable._connection; |
| this.connection = null; |
| if (sharedConnection && (!connection || sharedConnection === connection)) { |
| sharedConnection.unsubscribe(); |
| } |
| } |
| } |
| //# sourceMappingURL=ConnectableObservable.js.map |