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

/** PURE_IMPORTS_START tslib,_OuterSubscriber,_util_subscribeToResult PURE_IMPORTS_END */
import * as tslib_1 from "tslib";
import { OuterSubscriber } from '../OuterSubscriber';
import { subscribeToResult } from '../util/subscribeToResult';
export function sample(notifier) {
    return function (source) { return source.lift(new SampleOperator(notifier)); };
}
var SampleOperator = /*@__PURE__*/ (function () {
    function SampleOperator(notifier) {
        this.notifier = notifier;
    }
    SampleOperator.prototype.call = function (subscriber, source) {
        var sampleSubscriber = new SampleSubscriber(subscriber);
        var subscription = source.subscribe(sampleSubscriber);
        subscription.add(subscribeToResult(sampleSubscriber, this.notifier));
        return subscription;
    };
    return SampleOperator;
}());
var SampleSubscriber = /*@__PURE__*/ (function (_super) {
    tslib_1.__extends(SampleSubscriber, _super);
    function SampleSubscriber() {
        var _this = _super !== null && _super.apply(this, arguments) || this;
        _this.hasValue = false;
        return _this;
    }
    SampleSubscriber.prototype._next = function (value) {
        this.value = value;
        this.hasValue = true;
    };
    SampleSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
        this.emitValue();
    };
    SampleSubscriber.prototype.notifyComplete = function () {
        this.emitValue();
    };
    SampleSubscriber.prototype.emitValue = function () {
        if (this.hasValue) {
            this.hasValue = false;
            this.destination.next(this.value);
        }
    };
    return SampleSubscriber;
}(OuterSubscriber));
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