repeat.js

/** PURE_IMPORTS_START .._Subscriber,.._observable_EmptyObservable PURE_IMPORTS_END */
var __extends = (this && this.__extends) || function (d, b) {
    for (var p in b)
        if (b.hasOwnProperty(p))
            d[p] = b[p];
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
import { Subscriber } from '../Subscriber';
import { EmptyObservable } from '../observable/EmptyObservable';
/**
 * Returns an Observable that repeats the stream of items emitted by the source Observable at most count times.
 *
 * <img src="./img/repeat.png" width="100%">
 *
 * @param {number} [count] The number of times the source Observable items are repeated, a count of 0 will yield
 * an empty Observable.
 * @return {Observable} An Observable that repeats the stream of items emitted by the source Observable at most
 * count times.
 * @method repeat
 * @owner Observable
 */
export function repeat(count) {
    if (count === void 0) {
        count = -1;
    }
    return function (source) {
        if (count === 0) {
            return new EmptyObservable();
        }
        else if (count < 0) {
            return source.lift(new RepeatOperator(-1, source));
        }
        else {
            return source.lift(new RepeatOperator(count - 1, source));
        }
    };
}
var RepeatOperator = /*@__PURE__*/ (/*@__PURE__*/ function () {
    function RepeatOperator(count, source) {
        this.count = count;
        this.source = source;
    }
    RepeatOperator.prototype.call = function (subscriber, source) {
        return source.subscribe(new RepeatSubscriber(subscriber, this.count, this.source));
    };
    return RepeatOperator;
}());
/**
 * We need this JSDoc comment for affecting ESDoc.
 * @ignore
 * @extends {Ignored}
 */
var RepeatSubscriber = /*@__PURE__*/ (/*@__PURE__*/ function (_super) {
    __extends(RepeatSubscriber, _super);
    function RepeatSubscriber(destination, count, source) {
        _super.call(this, destination);
        this.count = count;
        this.source = source;
    }
    RepeatSubscriber.prototype.complete = function () {
        if (!this.isStopped) {
            var _a = this, source = _a.source, count = _a.count;
            if (count === 0) {
                return _super.prototype.complete.call(this);
            }
            else if (count > -1) {
                this.count = count - 1;
            }
            source.subscribe(this._unsubscribeAndRecycle());
        }
    };
    return RepeatSubscriber;
}(Subscriber));
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