52 lines
No EOL
1.6 KiB
JavaScript
52 lines
No EOL
1.6 KiB
JavaScript
import { Subscriber } from '../Subscriber';
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export function refCount() {
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return function refCountOperatorFunction(source) {
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return source.lift(new RefCountOperator(source));
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};
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}
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class RefCountOperator {
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constructor(connectable) {
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this.connectable = connectable;
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}
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call(subscriber, source) {
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const { connectable } = this;
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connectable._refCount++;
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const refCounter = new RefCountSubscriber(subscriber, connectable);
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const 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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}
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class RefCountSubscriber extends Subscriber {
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constructor(destination, connectable) {
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super(destination);
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this.connectable = connectable;
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}
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_unsubscribe() {
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const { connectable } = this;
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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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const 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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const { connection } = this;
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const 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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}
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//# sourceMappingURL=refCount.js.map
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