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node_modules/rxjs/_esm5/internal/operators/refCount.js

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+/** PURE_IMPORTS_START tslib,_Subscriber PURE_IMPORTS_END */
+import * as tslib_1 from "tslib";
+import { Subscriber } from '../Subscriber';
+export function refCount() {
+    return function refCountOperatorFunction(source) {
+        return source.lift(new RefCountOperator(source));
+    };
+}
+var RefCountOperator = /*@__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__*/ (function (_super) {
+    tslib_1.__extends(RefCountSubscriber, _super);
+    function RefCountSubscriber(destination, connectable) {
+        var _this = _super.call(this, destination) || this;
+        _this.connectable = connectable;
+        return _this;
+    }
+    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;
+        }
+        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