79 lines
No EOL
2.8 KiB
JavaScript
79 lines
No EOL
2.8 KiB
JavaScript
import { innerFrom } from '../observable/innerFrom';
|
|
import { Subject } from '../Subject';
|
|
import { SafeSubscriber } from '../Subscriber';
|
|
import { operate } from '../util/lift';
|
|
export function share(options = {}) {
|
|
const { connector = () => new Subject(), resetOnError = true, resetOnComplete = true, resetOnRefCountZero = true } = options;
|
|
return (wrapperSource) => {
|
|
let connection;
|
|
let resetConnection;
|
|
let subject;
|
|
let refCount = 0;
|
|
let hasCompleted = false;
|
|
let hasErrored = false;
|
|
const cancelReset = () => {
|
|
resetConnection === null || resetConnection === void 0 ? void 0 : resetConnection.unsubscribe();
|
|
resetConnection = undefined;
|
|
};
|
|
const reset = () => {
|
|
cancelReset();
|
|
connection = subject = undefined;
|
|
hasCompleted = hasErrored = false;
|
|
};
|
|
const resetAndUnsubscribe = () => {
|
|
const conn = connection;
|
|
reset();
|
|
conn === null || conn === void 0 ? void 0 : conn.unsubscribe();
|
|
};
|
|
return operate((source, subscriber) => {
|
|
refCount++;
|
|
if (!hasErrored && !hasCompleted) {
|
|
cancelReset();
|
|
}
|
|
const dest = (subject = subject !== null && subject !== void 0 ? subject : connector());
|
|
subscriber.add(() => {
|
|
refCount--;
|
|
if (refCount === 0 && !hasErrored && !hasCompleted) {
|
|
resetConnection = handleReset(resetAndUnsubscribe, resetOnRefCountZero);
|
|
}
|
|
});
|
|
dest.subscribe(subscriber);
|
|
if (!connection &&
|
|
refCount > 0) {
|
|
connection = new SafeSubscriber({
|
|
next: (value) => dest.next(value),
|
|
error: (err) => {
|
|
hasErrored = true;
|
|
cancelReset();
|
|
resetConnection = handleReset(reset, resetOnError, err);
|
|
dest.error(err);
|
|
},
|
|
complete: () => {
|
|
hasCompleted = true;
|
|
cancelReset();
|
|
resetConnection = handleReset(reset, resetOnComplete);
|
|
dest.complete();
|
|
},
|
|
});
|
|
innerFrom(source).subscribe(connection);
|
|
}
|
|
})(wrapperSource);
|
|
};
|
|
}
|
|
function handleReset(reset, on, ...args) {
|
|
if (on === true) {
|
|
reset();
|
|
return;
|
|
}
|
|
if (on === false) {
|
|
return;
|
|
}
|
|
const onSubscriber = new SafeSubscriber({
|
|
next: () => {
|
|
onSubscriber.unsubscribe();
|
|
reset();
|
|
},
|
|
});
|
|
return on(...args).subscribe(onSubscriber);
|
|
}
|
|
//# sourceMappingURL=share.js.map
|