/
async.ts
110 lines (83 loc) 路 3.54 KB
/
async.ts
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/// <reference path="../../typings/es6-promise/es6-promise.d.ts" />
/// <reference path="../../typings/rx/rx.all.d.ts" />
import {global, isPresent} from 'angular2/src/facade/lang';
import {List} from 'angular2/src/facade/collection';
import * as Rx from 'rx';
export var Promise = (<any>global).Promise;
export class PromiseWrapper {
static resolve(obj): Promise<any> { return Promise.resolve(obj); }
static reject(obj, _): Promise<any> { return Promise.reject(obj); }
// Note: We can't rename this method into `catch`, as this is not a valid
// method name in Dart.
static catchError<T>(promise: Promise<T>, onError: (error: any) => T | Thenable<T>): Promise<T> {
return promise.catch(onError);
}
static all(promises: List<any>): Promise<any> {
if (promises.length == 0) return Promise.resolve([]);
return Promise.all(promises);
}
static then<T>(promise: Promise<T>, success: (value: any) => T | Thenable<T>,
rejection?: (error: any, stack?: any) => T | Thenable<T>): Promise<T> {
return promise.then(success, rejection);
}
static completer() {
var resolve;
var reject;
var p = new Promise(function(res, rej) {
resolve = res;
reject = rej;
});
return {promise: p, resolve: resolve, reject: reject};
}
}
export class TimerWrapper {
static setTimeout(fn: Function, millis: int): int { return global.setTimeout(fn, millis); }
static clearTimeout(id: int): void { global.clearTimeout(id); }
static setInterval(fn: Function, millis: int): int { return global.setInterval(fn, millis); }
static clearInterval(id: int): void { global.clearInterval(id); }
}
export class ObservableWrapper {
static subscribe(emitter: Observable, onNext, onThrow = null, onReturn = null): Object {
return emitter.observer({next: onNext, throw: onThrow, return: onReturn});
}
static isObservable(obs: any): boolean { return obs instanceof Observable; }
static dispose(subscription: any) { subscription.dispose(); }
static callNext(emitter: EventEmitter, value: any) { emitter.next(value); }
static callThrow(emitter: EventEmitter, error: any) { emitter.throw(error); }
static callReturn(emitter: EventEmitter) { emitter.return (null); }
}
// TODO: vsavkin change to interface
export class Observable {
observer(generator: any): Object { return null; }
}
/**
* Use Rx.Observable but provides an adapter to make it work as specified here:
* https://github.com/jhusain/observable-spec
*
* Once a reference implementation of the spec is available, switch to it.
*/
export class EventEmitter extends Observable {
_subject: Rx.Subject<any>;
_immediateScheduler;
constructor() {
super();
// System creates a different object for import * than Typescript es5 emit.
if (Rx.hasOwnProperty('default')) {
this._subject = new (<any>Rx).default.Rx.Subject();
this._immediateScheduler = (<any>Rx).default.Rx.Scheduler.immediate;
} else {
this._subject = new Rx.Subject<any>();
this._immediateScheduler = (<any>Rx.Scheduler).immediate;
}
}
observer(generator) {
return this._subject.observeOn(this._immediateScheduler)
.subscribe((value) => { setTimeout(() => generator.next(value)); },
(error) => generator.throw ? generator.throw(error) : null,
() => generator.return ? generator.return () : null);
}
toRx(): Rx.Observable<any> { return this._subject; }
next(value) { this._subject.onNext(value); }
throw(error) { this._subject.onError(error); }
return (value?) { this._subject.onCompleted(); }
}