@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
126 lines • 4.09 kB
JavaScript
;
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
}
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
var Subscriber_1 = require("../Subscriber");
var empty_1 = require("../observable/empty");
/**
* Returns an Observable that will resubscribe to the source stream when the source stream completes, at most count times.
*
* <span class="informal">Repeats all values emitted on the source. It's like {@link retry}, but for non error cases.</span>
*
* 
*
* Similar to {@link retry}, this operator repeats the stream of items emitted by the source for non error cases.
* Repeat can be useful for creating observables that are meant to have some repeated pattern or rhythm.
*
* Note: `repeat(0)` returns an empty observable and `repeat()` will repeat forever
*
* ## Example
* Repeat a message stream
* ```ts
* import { of } from 'rxjs';
* import { repeat, delay } from 'rxjs/operators';
*
* const source = of('Repeat message');
* const example = source.pipe(repeat(3));
* example.subscribe(x => console.log(x));
*
* // Results
* // Repeat message
* // Repeat message
* // Repeat message
* ```
*
* Repeat 3 values, 2 times
* ```ts
* import { interval } from 'rxjs';
* import { repeat, take } from 'rxjs/operators';
*
* const source = interval(1000);
* const example = source.pipe(take(3), repeat(2));
* example.subscribe(x => console.log(x));
*
* // Results every second
* // 0
* // 1
* // 2
* // 0
* // 1
* // 2
* ```
*
* @see {@link repeatWhen}
* @see {@link retry}
*
* @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 will resubscribe to the source stream when the source stream completes
* , at most count times.
* @method repeat
* @owner Observable
*/
function repeat(count) {
if (count === void 0) { count = -1; }
return function (source) {
if (count === 0) {
return empty_1.empty();
}
else if (count < 0) {
return source.lift(new RepeatOperator(-1, source));
}
else {
return source.lift(new RepeatOperator(count - 1, source));
}
};
}
exports.repeat = repeat;
var RepeatOperator = /** @class */ (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 = /** @class */ (function (_super) {
__extends(RepeatSubscriber, _super);
function RepeatSubscriber(destination, count, source) {
var _this = _super.call(this, destination) || this;
_this.count = count;
_this.source = source;
return _this;
}
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_1.Subscriber));
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