es6/operator/repeat.js

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,
 * on a particular Scheduler.
 *
 * <img src="./img/repeat.png" width="100%">
 *
 * @param {Scheduler} [scheduler] the Scheduler to emit the items on.
 * @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; }
    if (count === 0) {
        return new EmptyObservable();
    }
    else if (count < 0) {
        return this.lift(new RepeatOperator(-1, this));
    }
    else {
        return this.lift(new RepeatOperator(count - 1, this));
    }
}
var RepeatOperator = (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 = (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;
            }
            this.unsubscribe();
            this.isStopped = false;
            this.closed = false;
            source.subscribe(this);
        }
    };
    return RepeatSubscriber;
}(Subscriber));
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