work.suroh.tk/node_modules/rxjs/_esm5/observable/ConnectableObservable.js

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2019-12-02 12:22:45 +00:00
/** PURE_IMPORTS_START .._Subject,.._Observable,.._Subscriber,.._Subscription,.._operators_refCount PURE_IMPORTS_END */
var __extends = (this && this.__extends) || function (d, b) {
for (var p in b)
if (b.hasOwnProperty(p))
d[p] = b[p];
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
import { SubjectSubscriber } from '../Subject';
import { Observable } from '../Observable';
import { Subscriber } from '../Subscriber';
import { Subscription } from '../Subscription';
import { refCount as higherOrderRefCount } from '../operators/refCount';
/**
* @class ConnectableObservable<T>
*/
export var ConnectableObservable = /*@__PURE__*/ (/*@__PURE__*/ function (_super) {
__extends(ConnectableObservable, _super);
function ConnectableObservable(/** @deprecated internal use only */ source,
/** @deprecated internal use only */ subjectFactory) {
_super.call(this);
this.source = source;
this.subjectFactory = subjectFactory;
/** @deprecated internal use only */ this._refCount = 0;
this._isComplete = false;
}
/** @deprecated internal use only */ ConnectableObservable.prototype._subscribe = function (subscriber) {
return this.getSubject().subscribe(subscriber);
};
/** @deprecated internal use only */ ConnectableObservable.prototype.getSubject = function () {
var subject = this._subject;
if (!subject || subject.isStopped) {
this._subject = this.subjectFactory();
}
return this._subject;
};
ConnectableObservable.prototype.connect = function () {
var 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;
}
else {
this._connection = connection;
}
}
return connection;
};
ConnectableObservable.prototype.refCount = function () {
return higherOrderRefCount()(this);
};
return ConnectableObservable;
}(Observable));
var connectableProto = ConnectableObservable.prototype;
export var connectableObservableDescriptor = {
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 }
};
var ConnectableSubscriber = /*@__PURE__*/ (/*@__PURE__*/ function (_super) {
__extends(ConnectableSubscriber, _super);
function ConnectableSubscriber(destination, connectable) {
_super.call(this, destination);
this.connectable = connectable;
}
ConnectableSubscriber.prototype._error = function (err) {
this._unsubscribe();
_super.prototype._error.call(this, err);
};
ConnectableSubscriber.prototype._complete = function () {
this.connectable._isComplete = true;
this._unsubscribe();
_super.prototype._complete.call(this);
};
/** @deprecated internal use only */ ConnectableSubscriber.prototype._unsubscribe = function () {
var connectable = this.connectable;
if (connectable) {
this.connectable = null;
var connection = connectable._connection;
connectable._refCount = 0;
connectable._subject = null;
connectable._connection = null;
if (connection) {
connection.unsubscribe();
}
}
};
return ConnectableSubscriber;
}(SubjectSubscriber));
var RefCountOperator = /*@__PURE__*/ (/*@__PURE__*/ function () {
function RefCountOperator(connectable) {
this.connectable = connectable;
}
RefCountOperator.prototype.call = function (subscriber, source) {
var connectable = this.connectable;
connectable._refCount++;
var refCounter = new RefCountSubscriber(subscriber, connectable);
var subscription = source.subscribe(refCounter);
if (!refCounter.closed) {
refCounter.connection = connectable.connect();
}
return subscription;
};
return RefCountOperator;
}());
var RefCountSubscriber = /*@__PURE__*/ (/*@__PURE__*/ function (_super) {
__extends(RefCountSubscriber, _super);
function RefCountSubscriber(destination, connectable) {
_super.call(this, destination);
this.connectable = connectable;
}
/** @deprecated internal use only */ RefCountSubscriber.prototype._unsubscribe = function () {
var connectable = this.connectable;
if (!connectable) {
this.connection = null;
return;
}
this.connectable = null;
var refCount = connectable._refCount;
if (refCount <= 0) {
this.connection = null;
return;
}
connectable._refCount = refCount - 1;
if (refCount > 1) {
this.connection = null;
return;
}
///
// Compare the local RefCountSubscriber's connection Subscription to the
// connection Subscription on the shared ConnectableObservable. In cases
// where the ConnectableObservable source synchronously emits values, and
// the RefCountSubscriber's downstream Observers synchronously unsubscribe,
// execution continues to here before the RefCountOperator has a chance to
// supply the RefCountSubscriber with the shared connection Subscription.
// For example:
// ```
// Observable.range(0, 10)
// .publish()
// .refCount()
// .take(5)
// .subscribe();
// ```
// In order to account for this case, RefCountSubscriber should only dispose
// the ConnectableObservable's shared connection Subscription if the
// connection Subscription exists, *and* either:
// a. RefCountSubscriber doesn't have a reference to the shared connection
// Subscription yet, or,
// b. RefCountSubscriber's connection Subscription reference is identical
// to the shared connection Subscription
///
var connection = this.connection;
var sharedConnection = connectable._connection;
this.connection = null;
if (sharedConnection && (!connection || sharedConnection === connection)) {
sharedConnection.unsubscribe();
}
};
return RefCountSubscriber;
}(Subscriber));
//# sourceMappingURL=ConnectableObservable.js.map