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

40 lines
1.4 KiB
JavaScript

import { Subject } from '../Subject';
import { operate } from '../util/lift';
import { createOperatorSubscriber } from './OperatorSubscriber';
export function windowCount(windowSize, startWindowEvery = 0) {
const startEvery = startWindowEvery > 0 ? startWindowEvery : windowSize;
return operate((source, subscriber) => {
let windows = [new Subject()];
let starts = [];
let count = 0;
subscriber.next(windows[0].asObservable());
source.subscribe(createOperatorSubscriber(subscriber, (value) => {
for (const window of windows) {
window.next(value);
}
const c = count - windowSize + 1;
if (c >= 0 && c % startEvery === 0) {
windows.shift().complete();
}
if (++count % startEvery === 0) {
const window = new Subject();
windows.push(window);
subscriber.next(window.asObservable());
}
}, () => {
while (windows.length > 0) {
windows.shift().complete();
}
subscriber.complete();
}, (err) => {
while (windows.length > 0) {
windows.shift().error(err);
}
subscriber.error(err);
}, () => {
starts = null;
windows = null;
}));
});
}
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