| /** PURE_IMPORTS_START .._Subscriber 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 { Subscriber } from '../Subscriber'; |
| export function refCount() { |
| return function refCountOperatorFunction(source) { |
| return source.lift(new RefCountOperator(source)); |
| }; |
| } |
| 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; |
| } |
| 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=refCount.js.map |