46 lines
1.3 KiB
JavaScript
46 lines
1.3 KiB
JavaScript
import { Subscriber } from '../Subscriber';
|
|
export function takeWhile(predicate, inclusive = false) {
|
|
return (source) => source.lift(new TakeWhileOperator(predicate, inclusive));
|
|
}
|
|
class TakeWhileOperator {
|
|
constructor(predicate, inclusive) {
|
|
this.predicate = predicate;
|
|
this.inclusive = inclusive;
|
|
}
|
|
call(subscriber, source) {
|
|
return source.subscribe(new TakeWhileSubscriber(subscriber, this.predicate, this.inclusive));
|
|
}
|
|
}
|
|
class TakeWhileSubscriber extends Subscriber {
|
|
constructor(destination, predicate, inclusive) {
|
|
super(destination);
|
|
this.predicate = predicate;
|
|
this.inclusive = inclusive;
|
|
this.index = 0;
|
|
}
|
|
_next(value) {
|
|
const destination = this.destination;
|
|
let result;
|
|
try {
|
|
result = this.predicate(value, this.index++);
|
|
}
|
|
catch (err) {
|
|
destination.error(err);
|
|
return;
|
|
}
|
|
this.nextOrComplete(value, result);
|
|
}
|
|
nextOrComplete(value, predicateResult) {
|
|
const destination = this.destination;
|
|
if (Boolean(predicateResult)) {
|
|
destination.next(value);
|
|
}
|
|
else {
|
|
if (this.inclusive) {
|
|
destination.next(value);
|
|
}
|
|
destination.complete();
|
|
}
|
|
}
|
|
}
|
|
//# sourceMappingURL=takeWhile.js.map
|