121 lines
4.6 KiB
JavaScript
121 lines
4.6 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 root_1 = require('../util/root');
|
|
var Observable_1 = require('../Observable');
|
|
/**
|
|
* We need this JSDoc comment for affecting ESDoc.
|
|
* @extends {Ignored}
|
|
* @hide true
|
|
*/
|
|
var PromiseObservable = (function (_super) {
|
|
__extends(PromiseObservable, _super);
|
|
function PromiseObservable(promise, scheduler) {
|
|
_super.call(this);
|
|
this.promise = promise;
|
|
this.scheduler = scheduler;
|
|
}
|
|
/**
|
|
* Converts a Promise to an Observable.
|
|
*
|
|
* <span class="informal">Returns an Observable that just emits the Promise's
|
|
* resolved value, then completes.</span>
|
|
*
|
|
* Converts an ES2015 Promise or a Promises/A+ spec compliant Promise to an
|
|
* Observable. If the Promise resolves with a value, the output Observable
|
|
* emits that resolved value as a `next`, and then completes. If the Promise
|
|
* is rejected, then the output Observable emits the corresponding Error.
|
|
*
|
|
* @example <caption>Convert the Promise returned by Fetch to an Observable</caption>
|
|
* var result = Rx.Observable.fromPromise(fetch('http://myserver.com/'));
|
|
* result.subscribe(x => console.log(x), e => console.error(e));
|
|
*
|
|
* @see {@link bindCallback}
|
|
* @see {@link from}
|
|
*
|
|
* @param {PromiseLike<T>} promise The promise to be converted.
|
|
* @param {Scheduler} [scheduler] An optional IScheduler to use for scheduling
|
|
* the delivery of the resolved value (or the rejection).
|
|
* @return {Observable<T>} An Observable which wraps the Promise.
|
|
* @static true
|
|
* @name fromPromise
|
|
* @owner Observable
|
|
*/
|
|
PromiseObservable.create = function (promise, scheduler) {
|
|
return new PromiseObservable(promise, scheduler);
|
|
};
|
|
/** @deprecated internal use only */ PromiseObservable.prototype._subscribe = function (subscriber) {
|
|
var _this = this;
|
|
var promise = this.promise;
|
|
var scheduler = this.scheduler;
|
|
if (scheduler == null) {
|
|
if (this._isScalar) {
|
|
if (!subscriber.closed) {
|
|
subscriber.next(this.value);
|
|
subscriber.complete();
|
|
}
|
|
}
|
|
else {
|
|
promise.then(function (value) {
|
|
_this.value = value;
|
|
_this._isScalar = true;
|
|
if (!subscriber.closed) {
|
|
subscriber.next(value);
|
|
subscriber.complete();
|
|
}
|
|
}, function (err) {
|
|
if (!subscriber.closed) {
|
|
subscriber.error(err);
|
|
}
|
|
})
|
|
.then(null, function (err) {
|
|
// escape the promise trap, throw unhandled errors
|
|
root_1.root.setTimeout(function () { throw err; });
|
|
});
|
|
}
|
|
}
|
|
else {
|
|
if (this._isScalar) {
|
|
if (!subscriber.closed) {
|
|
return scheduler.schedule(dispatchNext, 0, { value: this.value, subscriber: subscriber });
|
|
}
|
|
}
|
|
else {
|
|
promise.then(function (value) {
|
|
_this.value = value;
|
|
_this._isScalar = true;
|
|
if (!subscriber.closed) {
|
|
subscriber.add(scheduler.schedule(dispatchNext, 0, { value: value, subscriber: subscriber }));
|
|
}
|
|
}, function (err) {
|
|
if (!subscriber.closed) {
|
|
subscriber.add(scheduler.schedule(dispatchError, 0, { err: err, subscriber: subscriber }));
|
|
}
|
|
})
|
|
.then(null, function (err) {
|
|
// escape the promise trap, throw unhandled errors
|
|
root_1.root.setTimeout(function () { throw err; });
|
|
});
|
|
}
|
|
}
|
|
};
|
|
return PromiseObservable;
|
|
}(Observable_1.Observable));
|
|
exports.PromiseObservable = PromiseObservable;
|
|
function dispatchNext(arg) {
|
|
var value = arg.value, subscriber = arg.subscriber;
|
|
if (!subscriber.closed) {
|
|
subscriber.next(value);
|
|
subscriber.complete();
|
|
}
|
|
}
|
|
function dispatchError(arg) {
|
|
var err = arg.err, subscriber = arg.subscriber;
|
|
if (!subscriber.closed) {
|
|
subscriber.error(err);
|
|
}
|
|
}
|
|
//# sourceMappingURL=PromiseObservable.js.map
|