om/node_modules/rxjs/_esm5/internal/operators/take.js

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