om/node_modules/rxjs/_esm2015/internal/operators/windowCount.js

import { Subscriber } from '../Subscriber';
import { Subject } from '../Subject';
export function windowCount(windowSize, startWindowEvery = 0) {
    return function windowCountOperatorFunction(source) {
        return source.lift(new WindowCountOperator(windowSize, startWindowEvery));
    };
}
class WindowCountOperator {
    constructor(windowSize, startWindowEvery) {
        this.windowSize = windowSize;
        this.startWindowEvery = startWindowEvery;
    }
    call(subscriber, source) {
        return source.subscribe(new WindowCountSubscriber(subscriber, this.windowSize, this.startWindowEvery));
    }
}
class WindowCountSubscriber extends Subscriber {
    constructor(destination, windowSize, startWindowEvery) {
        super(destination);
        this.destination = destination;
        this.windowSize = windowSize;
        this.startWindowEvery = startWindowEvery;
        this.windows = [new Subject()];
        this.count = 0;
        destination.next(this.windows[0]);
    }
    _next(value) {
        const startWindowEvery = (this.startWindowEvery > 0) ? this.startWindowEvery : this.windowSize;
        const destination = this.destination;
        const windowSize = this.windowSize;
        const windows = this.windows;
        const len = windows.length;
        for (let i = 0; i < len && !this.closed; i++) {
            windows[i].next(value);
        }
        const c = this.count - windowSize + 1;
        if (c >= 0 && c % startWindowEvery === 0 && !this.closed) {
            windows.shift().complete();
        }
        if (++this.count % startWindowEvery === 0 && !this.closed) {
            const window = new Subject();
            windows.push(window);
            destination.next(window);
        }
    }
    _error(err) {
        const windows = this.windows;
        if (windows) {
            while (windows.length > 0 && !this.closed) {
                windows.shift().error(err);
            }
        }
        this.destination.error(err);
    }
    _complete() {
        const windows = this.windows;
        if (windows) {
            while (windows.length > 0 && !this.closed) {
                windows.shift().complete();
            }
        }
        this.destination.complete();
    }
    _unsubscribe() {
        this.count = 0;
        this.windows = null;
    }
}
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