73 lines
2.4 KiB
JavaScript
73 lines
2.4 KiB
JavaScript
import { Subscriber } from '../Subscriber';
|
|
import { async } from '../scheduler/async';
|
|
import { defaultThrottleConfig } from './throttle';
|
|
export function throttleTime(duration, scheduler = async, config = defaultThrottleConfig) {
|
|
return (source) => source.lift(new ThrottleTimeOperator(duration, scheduler, config.leading, config.trailing));
|
|
}
|
|
class ThrottleTimeOperator {
|
|
constructor(duration, scheduler, leading, trailing) {
|
|
this.duration = duration;
|
|
this.scheduler = scheduler;
|
|
this.leading = leading;
|
|
this.trailing = trailing;
|
|
}
|
|
call(subscriber, source) {
|
|
return source.subscribe(new ThrottleTimeSubscriber(subscriber, this.duration, this.scheduler, this.leading, this.trailing));
|
|
}
|
|
}
|
|
class ThrottleTimeSubscriber extends Subscriber {
|
|
constructor(destination, duration, scheduler, leading, trailing) {
|
|
super(destination);
|
|
this.duration = duration;
|
|
this.scheduler = scheduler;
|
|
this.leading = leading;
|
|
this.trailing = trailing;
|
|
this._hasTrailingValue = false;
|
|
this._trailingValue = null;
|
|
}
|
|
_next(value) {
|
|
if (this.throttled) {
|
|
if (this.trailing) {
|
|
this._trailingValue = value;
|
|
this._hasTrailingValue = true;
|
|
}
|
|
}
|
|
else {
|
|
this.add(this.throttled = this.scheduler.schedule(dispatchNext, this.duration, { subscriber: this }));
|
|
if (this.leading) {
|
|
this.destination.next(value);
|
|
}
|
|
else if (this.trailing) {
|
|
this._trailingValue = value;
|
|
this._hasTrailingValue = true;
|
|
}
|
|
}
|
|
}
|
|
_complete() {
|
|
if (this._hasTrailingValue) {
|
|
this.destination.next(this._trailingValue);
|
|
this.destination.complete();
|
|
}
|
|
else {
|
|
this.destination.complete();
|
|
}
|
|
}
|
|
clearThrottle() {
|
|
const throttled = this.throttled;
|
|
if (throttled) {
|
|
if (this.trailing && this._hasTrailingValue) {
|
|
this.destination.next(this._trailingValue);
|
|
this._trailingValue = null;
|
|
this._hasTrailingValue = false;
|
|
}
|
|
throttled.unsubscribe();
|
|
this.remove(throttled);
|
|
this.throttled = null;
|
|
}
|
|
}
|
|
}
|
|
function dispatchNext(arg) {
|
|
const { subscriber } = arg;
|
|
subscriber.clearThrottle();
|
|
}
|
|
//# sourceMappingURL=throttleTime.js.map
|