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Diffstat (limited to 'tools/node_modules/eslint/node_modules/rxjs/src/internal/operators/refCount.ts')
-rw-r--r-- | tools/node_modules/eslint/node_modules/rxjs/src/internal/operators/refCount.ts | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/tools/node_modules/eslint/node_modules/rxjs/src/internal/operators/refCount.ts b/tools/node_modules/eslint/node_modules/rxjs/src/internal/operators/refCount.ts deleted file mode 100644 index c1c725221b..0000000000 --- a/tools/node_modules/eslint/node_modules/rxjs/src/internal/operators/refCount.ts +++ /dev/null @@ -1,95 +0,0 @@ -import { Operator } from '../Operator'; -import { Subscriber } from '../Subscriber'; -import { Subscription } from '../Subscription'; -import { MonoTypeOperatorFunction, TeardownLogic } from '../types'; -import { ConnectableObservable } from '../observable/ConnectableObservable'; -import { Observable } from '../Observable'; - -export function refCount<T>(): MonoTypeOperatorFunction<T> { - return function refCountOperatorFunction(source: ConnectableObservable<T>): Observable<T> { - return source.lift(new RefCountOperator(source)); - } as MonoTypeOperatorFunction<T>; -} - -class RefCountOperator<T> implements Operator<T, T> { - constructor(private connectable: ConnectableObservable<T>) { - } - call(subscriber: Subscriber<T>, source: any): TeardownLogic { - - const { connectable } = this; - (<any> connectable)._refCount++; - - const refCounter = new RefCountSubscriber(subscriber, connectable); - const subscription = source.subscribe(refCounter); - - if (!refCounter.closed) { - (<any> refCounter).connection = connectable.connect(); - } - - return subscription; - } -} - -class RefCountSubscriber<T> extends Subscriber<T> { - - private connection: Subscription; - - constructor(destination: Subscriber<T>, - private connectable: ConnectableObservable<T>) { - super(destination); - } - - protected _unsubscribe() { - - const { connectable } = this; - if (!connectable) { - this.connection = null; - return; - } - - this.connectable = null; - const refCount = (<any> connectable)._refCount; - if (refCount <= 0) { - this.connection = null; - return; - } - - (<any> 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: - // ``` - // range(0, 10).pipe( - // 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 - /// - const { connection } = this; - const sharedConnection = (<any> connectable)._connection; - this.connection = null; - - if (sharedConnection && (!connection || sharedConnection === connection)) { - sharedConnection.unsubscribe(); - } - } -} |