50 lines
1.6 KiB
JavaScript
50 lines
1.6 KiB
JavaScript
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/** PURE_IMPORTS_START tslib,_Subscriber,_util_ArgumentOutOfRangeError,_observable_empty PURE_IMPORTS_END */
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import * as tslib_1 from "tslib";
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import { Subscriber } from '../Subscriber';
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import { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';
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import { empty } from '../observable/empty';
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export function take(count) {
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return function (source) {
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if (count === 0) {
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return empty();
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}
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else {
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return source.lift(new TakeOperator(count));
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}
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};
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}
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var TakeOperator = /*@__PURE__*/ (function () {
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function TakeOperator(total) {
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this.total = total;
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if (this.total < 0) {
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throw new ArgumentOutOfRangeError;
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}
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}
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TakeOperator.prototype.call = function (subscriber, source) {
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return source.subscribe(new TakeSubscriber(subscriber, this.total));
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};
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return TakeOperator;
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}());
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var TakeSubscriber = /*@__PURE__*/ (function (_super) {
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tslib_1.__extends(TakeSubscriber, _super);
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function TakeSubscriber(destination, total) {
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var _this = _super.call(this, destination) || this;
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_this.total = total;
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_this.count = 0;
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return _this;
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}
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TakeSubscriber.prototype._next = function (value) {
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var total = this.total;
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var count = ++this.count;
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if (count <= total) {
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this.destination.next(value);
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if (count === total) {
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this.destination.complete();
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this.unsubscribe();
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}
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}
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};
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return TakeSubscriber;
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}(Subscriber));
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//# sourceMappingURL=take.js.map
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