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node_modules/rxjs/_esm5/observable/ConnectableObservable.js
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172
node_modules/rxjs/_esm5/observable/ConnectableObservable.js
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/** PURE_IMPORTS_START .._Subject,.._Observable,.._Subscriber,.._Subscription,.._operators_refCount PURE_IMPORTS_END */
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var __extends = (this && this.__extends) || function (d, b) {
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for (var p in b)
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if (b.hasOwnProperty(p))
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d[p] = b[p];
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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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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/**
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* @class ConnectableObservable<T>
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*/
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export var ConnectableObservable = /*@__PURE__*/ (/*@__PURE__*/ function (_super) {
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__extends(ConnectableObservable, _super);
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function ConnectableObservable(/** @deprecated internal use only */ source,
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/** @deprecated internal use only */ subjectFactory) {
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_super.call(this);
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this.source = source;
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this.subjectFactory = subjectFactory;
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/** @deprecated internal use only */ this._refCount = 0;
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this._isComplete = false;
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}
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/** @deprecated internal use only */ ConnectableObservable.prototype._subscribe = function (subscriber) {
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return this.getSubject().subscribe(subscriber);
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};
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/** @deprecated internal use only */ ConnectableObservable.prototype.getSubject = function () {
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var 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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ConnectableObservable.prototype.connect = function () {
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var 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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else {
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this._connection = connection;
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}
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}
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return connection;
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};
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ConnectableObservable.prototype.refCount = function () {
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return higherOrderRefCount()(this);
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};
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return ConnectableObservable;
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}(Observable));
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var connectableProto = ConnectableObservable.prototype;
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export var 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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var ConnectableSubscriber = /*@__PURE__*/ (/*@__PURE__*/ function (_super) {
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__extends(ConnectableSubscriber, _super);
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function ConnectableSubscriber(destination, connectable) {
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_super.call(this, destination);
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this.connectable = connectable;
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}
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ConnectableSubscriber.prototype._error = function (err) {
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this._unsubscribe();
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_super.prototype._error.call(this, err);
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};
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ConnectableSubscriber.prototype._complete = function () {
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this.connectable._isComplete = true;
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this._unsubscribe();
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_super.prototype._complete.call(this);
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};
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/** @deprecated internal use only */ ConnectableSubscriber.prototype._unsubscribe = function () {
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var connectable = this.connectable;
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if (connectable) {
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this.connectable = null;
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var 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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return ConnectableSubscriber;
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}(SubjectSubscriber));
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var RefCountOperator = /*@__PURE__*/ (/*@__PURE__*/ function () {
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function RefCountOperator(connectable) {
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this.connectable = connectable;
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}
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RefCountOperator.prototype.call = function (subscriber, source) {
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var connectable = this.connectable;
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connectable._refCount++;
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var refCounter = new RefCountSubscriber(subscriber, connectable);
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var 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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return RefCountOperator;
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}());
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var RefCountSubscriber = /*@__PURE__*/ (/*@__PURE__*/ function (_super) {
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__extends(RefCountSubscriber, _super);
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function RefCountSubscriber(destination, connectable) {
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_super.call(this, destination);
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this.connectable = connectable;
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}
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/** @deprecated internal use only */ RefCountSubscriber.prototype._unsubscribe = function () {
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var connectable = this.connectable;
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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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var 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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///
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// Compare the local RefCountSubscriber's connection Subscription to the
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// connection Subscription on the shared ConnectableObservable. In cases
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// where the ConnectableObservable source synchronously emits values, and
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// the RefCountSubscriber's downstream Observers synchronously unsubscribe,
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// execution continues to here before the RefCountOperator has a chance to
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// supply the RefCountSubscriber with the shared connection Subscription.
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// For example:
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// ```
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// Observable.range(0, 10)
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// .publish()
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// .refCount()
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// .take(5)
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// .subscribe();
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// ```
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// In order to account for this case, RefCountSubscriber should only dispose
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// the ConnectableObservable's shared connection Subscription if the
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// connection Subscription exists, *and* either:
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// a. RefCountSubscriber doesn't have a reference to the shared connection
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// Subscription yet, or,
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// b. RefCountSubscriber's connection Subscription reference is identical
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// to the shared connection Subscription
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///
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var connection = this.connection;
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var 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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return RefCountSubscriber;
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}(Subscriber));
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//# sourceMappingURL=ConnectableObservable.js.map
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