hugoWebsite/node_modules/rxjs/dist/esm/internal/operators/mergeInternals.js

58 lines
2.2 KiB
JavaScript

import { innerFrom } from '../observable/innerFrom';
import { executeSchedule } from '../util/executeSchedule';
import { createOperatorSubscriber } from './OperatorSubscriber';
export function mergeInternals(source, subscriber, project, concurrent, onBeforeNext, expand, innerSubScheduler, additionalFinalizer) {
const buffer = [];
let active = 0;
let index = 0;
let isComplete = false;
const checkComplete = () => {
if (isComplete && !buffer.length && !active) {
subscriber.complete();
}
};
const outerNext = (value) => (active < concurrent ? doInnerSub(value) : buffer.push(value));
const doInnerSub = (value) => {
expand && subscriber.next(value);
active++;
let innerComplete = false;
innerFrom(project(value, index++)).subscribe(createOperatorSubscriber(subscriber, (innerValue) => {
onBeforeNext === null || onBeforeNext === void 0 ? void 0 : onBeforeNext(innerValue);
if (expand) {
outerNext(innerValue);
}
else {
subscriber.next(innerValue);
}
}, () => {
innerComplete = true;
}, undefined, () => {
if (innerComplete) {
try {
active--;
while (buffer.length && active < concurrent) {
const bufferedValue = buffer.shift();
if (innerSubScheduler) {
executeSchedule(subscriber, innerSubScheduler, () => doInnerSub(bufferedValue));
}
else {
doInnerSub(bufferedValue);
}
}
checkComplete();
}
catch (err) {
subscriber.error(err);
}
}
}));
};
source.subscribe(createOperatorSubscriber(subscriber, outerNext, () => {
isComplete = true;
checkComplete();
}));
return () => {
additionalFinalizer === null || additionalFinalizer === void 0 ? void 0 : additionalFinalizer();
};
}
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