@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
133 lines • 5.27 kB
JavaScript
"use strict";
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 Subject_1 = require("../Subject");
var innerSubscribe_1 = require("../innerSubscribe");
/**
* Returns an Observable that mirrors the source Observable with the exception of a `complete`. If the source
* Observable calls `complete`, this method will emit to the Observable returned from `notifier`. If that Observable
* calls `complete` or `error`, then this method will call `complete` or `error` on the child subscription. Otherwise
* this method will resubscribe to the source Observable.
*
* 
*
* ## Example
* Repeat a message stream on click
* ```ts
* import { of, fromEvent } from 'rxjs';
* import { repeatWhen } from 'rxjs/operators';
*
* const source = of('Repeat message');
* const documentClick$ = fromEvent(document, 'click');
*
* source.pipe(repeatWhen(() => documentClick$)
* ).subscribe(data => console.log(data))
* ```
* @see {@link repeat}
* @see {@link retry}
* @see {@link retryWhen}
*
* @param {function(notifications: Observable): Observable} notifier - Receives an Observable of notifications with
* which a user can `complete` or `error`, aborting the repetition.
* @return {Observable} The source Observable modified with repeat logic.
* @method repeatWhen
* @owner Observable
*/
function repeatWhen(notifier) {
return function (source) { return source.lift(new RepeatWhenOperator(notifier)); };
}
exports.repeatWhen = repeatWhen;
var RepeatWhenOperator = /** @class */ (function () {
function RepeatWhenOperator(notifier) {
this.notifier = notifier;
}
RepeatWhenOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new RepeatWhenSubscriber(subscriber, this.notifier, source));
};
return RepeatWhenOperator;
}());
/**
* We need this JSDoc comment for affecting ESDoc.
* @ignore
* @extends {Ignored}
*/
var RepeatWhenSubscriber = /** @class */ (function (_super) {
__extends(RepeatWhenSubscriber, _super);
function RepeatWhenSubscriber(destination, notifier, source) {
var _this = _super.call(this, destination) || this;
_this.notifier = notifier;
_this.source = source;
_this.sourceIsBeingSubscribedTo = true;
return _this;
}
RepeatWhenSubscriber.prototype.notifyNext = function () {
this.sourceIsBeingSubscribedTo = true;
this.source.subscribe(this);
};
RepeatWhenSubscriber.prototype.notifyComplete = function () {
if (this.sourceIsBeingSubscribedTo === false) {
return _super.prototype.complete.call(this);
}
};
RepeatWhenSubscriber.prototype.complete = function () {
this.sourceIsBeingSubscribedTo = false;
if (!this.isStopped) {
if (!this.retries) {
this.subscribeToRetries();
}
if (!this.retriesSubscription || this.retriesSubscription.closed) {
return _super.prototype.complete.call(this);
}
this._unsubscribeAndRecycle();
this.notifications.next(undefined);
}
};
/** @deprecated This is an internal implementation detail, do not use. */
RepeatWhenSubscriber.prototype._unsubscribe = function () {
var _a = this, notifications = _a.notifications, retriesSubscription = _a.retriesSubscription;
if (notifications) {
notifications.unsubscribe();
this.notifications = undefined;
}
if (retriesSubscription) {
retriesSubscription.unsubscribe();
this.retriesSubscription = undefined;
}
this.retries = undefined;
};
/** @deprecated This is an internal implementation detail, do not use. */
RepeatWhenSubscriber.prototype._unsubscribeAndRecycle = function () {
var _unsubscribe = this._unsubscribe;
this._unsubscribe = null;
_super.prototype._unsubscribeAndRecycle.call(this);
this._unsubscribe = _unsubscribe;
return this;
};
RepeatWhenSubscriber.prototype.subscribeToRetries = function () {
this.notifications = new Subject_1.Subject();
var retries;
try {
var notifier = this.notifier;
retries = notifier(this.notifications);
}
catch (e) {
return _super.prototype.complete.call(this);
}
this.retries = retries;
this.retriesSubscription = innerSubscribe_1.innerSubscribe(retries, new innerSubscribe_1.SimpleInnerSubscriber(this));
};
return RepeatWhenSubscriber;
}(innerSubscribe_1.SimpleOuterSubscriber));
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