Last change
on this file since 6c1585f was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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Property mode
set to
100644
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File size:
1.6 KB
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1 | import { Subscriber } from '../Subscriber';
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2 | export function refCount() {
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3 | return function refCountOperatorFunction(source) {
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4 | return source.lift(new RefCountOperator(source));
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5 | };
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6 | }
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7 | class RefCountOperator {
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8 | constructor(connectable) {
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9 | this.connectable = connectable;
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10 | }
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11 | call(subscriber, source) {
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12 | const { connectable } = this;
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13 | connectable._refCount++;
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14 | const refCounter = new RefCountSubscriber(subscriber, connectable);
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15 | const subscription = source.subscribe(refCounter);
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16 | if (!refCounter.closed) {
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17 | refCounter.connection = connectable.connect();
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18 | }
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19 | return subscription;
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20 | }
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21 | }
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22 | class RefCountSubscriber extends Subscriber {
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23 | constructor(destination, connectable) {
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24 | super(destination);
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25 | this.connectable = connectable;
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26 | }
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27 | _unsubscribe() {
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28 | const { connectable } = this;
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29 | if (!connectable) {
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30 | this.connection = null;
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31 | return;
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32 | }
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33 | this.connectable = null;
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34 | const refCount = connectable._refCount;
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35 | if (refCount <= 0) {
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36 | this.connection = null;
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37 | return;
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38 | }
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39 | connectable._refCount = refCount - 1;
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40 | if (refCount > 1) {
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41 | this.connection = null;
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42 | return;
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43 | }
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44 | const { connection } = this;
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45 | const sharedConnection = connectable._connection;
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46 | this.connection = null;
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47 | if (sharedConnection && (!connection || sharedConnection === connection)) {
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48 | sharedConnection.unsubscribe();
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49 | }
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50 | }
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51 | }
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52 | //# sourceMappingURL=refCount.js.map |
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