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