56 lines
2.2 KiB
JavaScript
56 lines
2.2 KiB
JavaScript
|
"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 OuterSubscriber_1 = require('../OuterSubscriber');
|
||
|
var subscribeToResult_1 = require('../util/subscribeToResult');
|
||
|
/**
|
||
|
* Returns an Observable that takes a source of observables and propagates the first observable exclusively
|
||
|
* until it completes before subscribing to the next.
|
||
|
* Items that come in before the first has exhausted will be dropped.
|
||
|
* Similar to `concatAll`, but will not hold on to items that come in before the first is exhausted.
|
||
|
* @returns {Observable} an Observable which contains all of the items of the first Observable and following Observables in the source.
|
||
|
*/
|
||
|
function exhaust() {
|
||
|
return this.lift(new SwitchFirstOperator());
|
||
|
}
|
||
|
exports.exhaust = exhaust;
|
||
|
var SwitchFirstOperator = (function () {
|
||
|
function SwitchFirstOperator() {
|
||
|
}
|
||
|
SwitchFirstOperator.prototype.call = function (subscriber) {
|
||
|
return new SwitchFirstSubscriber(subscriber);
|
||
|
};
|
||
|
return SwitchFirstOperator;
|
||
|
}());
|
||
|
var SwitchFirstSubscriber = (function (_super) {
|
||
|
__extends(SwitchFirstSubscriber, _super);
|
||
|
function SwitchFirstSubscriber(destination) {
|
||
|
_super.call(this, destination);
|
||
|
this.hasCompleted = false;
|
||
|
this.hasSubscription = false;
|
||
|
}
|
||
|
SwitchFirstSubscriber.prototype._next = function (value) {
|
||
|
if (!this.hasSubscription) {
|
||
|
this.hasSubscription = true;
|
||
|
this.add(subscribeToResult_1.subscribeToResult(this, value));
|
||
|
}
|
||
|
};
|
||
|
SwitchFirstSubscriber.prototype._complete = function () {
|
||
|
this.hasCompleted = true;
|
||
|
if (!this.hasSubscription) {
|
||
|
this.destination.complete();
|
||
|
}
|
||
|
};
|
||
|
SwitchFirstSubscriber.prototype.notifyComplete = function (innerSub) {
|
||
|
this.remove(innerSub);
|
||
|
this.hasSubscription = false;
|
||
|
if (this.hasCompleted) {
|
||
|
this.destination.complete();
|
||
|
}
|
||
|
};
|
||
|
return SwitchFirstSubscriber;
|
||
|
}(OuterSubscriber_1.OuterSubscriber));
|
||
|
//# sourceMappingURL=exhaust.js.map
|