race.js
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"use strict";
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 __());
};
var isArray_1 = require('../util/isArray');
var ArrayObservable_1 = require('../observable/ArrayObservable');
var OuterSubscriber_1 = require('../OuterSubscriber');
var subscribeToResult_1 = require('../util/subscribeToResult');
/* tslint:disable:max-line-length */
/**
* Returns an Observable that mirrors the first source Observable to emit an item
* from the combination of this Observable and supplied Observables
* @param {...Observables} ...observables sources used to race for which Observable emits first.
* @return {Observable} an Observable that mirrors the output of the first Observable to emit an item.
* @method race
* @owner Observable
*/
function race() {
var observables = [];
for (var _i = 0; _i < arguments.length; _i++) {
observables[_i - 0] = arguments[_i];
}
// if the only argument is an array, it was most likely called with
// `pair([obs1, obs2, ...])`
if (observables.length === 1 && isArray_1.isArray(observables[0])) {
observables = observables[0];
}
return this.lift.call(raceStatic.apply(void 0, [this].concat(observables)));
}
exports.race = race;
function raceStatic() {
var observables = [];
for (var _i = 0; _i < arguments.length; _i++) {
observables[_i - 0] = arguments[_i];
}
// if the only argument is an array, it was most likely called with
// `pair([obs1, obs2, ...])`
if (observables.length === 1) {
if (isArray_1.isArray(observables[0])) {
observables = observables[0];
}
else {
return observables[0];
}
}
return new ArrayObservable_1.ArrayObservable(observables).lift(new RaceOperator());
}
exports.raceStatic = raceStatic;
var RaceOperator = (function () {
function RaceOperator() {
}
RaceOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new RaceSubscriber(subscriber));
};
return RaceOperator;
}());
exports.RaceOperator = RaceOperator;
/**
* We need this JSDoc comment for affecting ESDoc.
* @ignore
* @extends {Ignored}
*/
var RaceSubscriber = (function (_super) {
__extends(RaceSubscriber, _super);
function RaceSubscriber(destination) {
_super.call(this, destination);
this.hasFirst = false;
this.observables = [];
this.subscriptions = [];
}
RaceSubscriber.prototype._next = function (observable) {
this.observables.push(observable);
};
RaceSubscriber.prototype._complete = function () {
var observables = this.observables;
var len = observables.length;
if (len === 0) {
this.destination.complete();
}
else {
for (var i = 0; i < len && !this.hasFirst; i++) {
var observable = observables[i];
var subscription = subscribeToResult_1.subscribeToResult(this, observable, observable, i);
if (this.subscriptions) {
this.subscriptions.push(subscription);
}
this.add(subscription);
}
this.observables = null;
}
};
RaceSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
if (!this.hasFirst) {
this.hasFirst = true;
for (var i = 0; i < this.subscriptions.length; i++) {
if (i !== outerIndex) {
var subscription = this.subscriptions[i];
subscription.unsubscribe();
this.remove(subscription);
}
}
this.subscriptions = null;
}
this.destination.next(innerValue);
};
return RaceSubscriber;
}(OuterSubscriber_1.OuterSubscriber));
exports.RaceSubscriber = RaceSubscriber;
//# sourceMappingURL=race.js.map