126 lines
2.9 KiB
JavaScript
126 lines
2.9 KiB
JavaScript
import {int, global, isPresent} from 'angular2/src/facade/lang';
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import {List} from 'angular2/src/facade/collection';
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import Rx from 'rx/dist/rx.all';
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export var Promise = global.Promise;
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export class PromiseWrapper {
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static resolve(obj):Promise {
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return Promise.resolve(obj);
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}
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static reject(obj):Promise {
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return Promise.reject(obj);
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}
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// Note: We can't rename this method into `catch`, as this is not a valid
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// method name in Dart.
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static catchError(promise:Promise, onError:Function):Promise {
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return promise.catch(onError);
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}
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static all(promises:List):Promise {
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if (promises.length == 0) return Promise.resolve([]);
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return Promise.all(promises);
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}
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static then(promise:Promise, success:Function, rejection:Function):Promise {
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return promise.then(success, rejection);
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}
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static completer() {
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var resolve;
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var reject;
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var p = new Promise(function(res, rej) {
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resolve = res;
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reject = rej;
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});
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return {
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promise: p,
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resolve: resolve,
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reject: reject
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};
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}
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static setTimeout(fn:Function, millis:int) {
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global.setTimeout(fn, millis);
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}
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static isPromise(maybePromise):boolean {
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return maybePromise instanceof Promise;
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}
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}
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export class ObservableWrapper {
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static subscribe(emitter:EventEmitter, onNext, onThrow = null, onReturn = null) {
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return emitter.observer({next: onNext, throw: onThrow, return: onReturn});
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}
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static dispose(subscription:any) {
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subscription.dispose();
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}
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static isObservable(obs):boolean {
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return obs instanceof Observable;
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}
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static callNext(emitter:EventEmitter, value:any) {
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emitter.next(value);
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}
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static callThrow(emitter:EventEmitter, error:any) {
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emitter.throw(error);
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}
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static callReturn(emitter:EventEmitter) {
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emitter.return();
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}
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}
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//TODO: vsavkin change to interface
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export class Observable {
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observer(generator:Function){}
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}
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/**
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* Use Rx.Observable but provides an adapter to make it work as specified here:
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* https://github.com/jhusain/observable-spec
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*
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* Once a reference implementation of the spec is available, switch to it.
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*/
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export class EventEmitter extends Observable {
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_subject:Rx.Subject;
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constructor() {
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super();
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this._subject = new Rx.Subject();
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}
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observer(generator) {
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// Rx.Scheduler.immediate and setTimeout is a workaround, so Rx works with zones.js.
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// Once https://github.com/angular/zone.js/issues/51 is fixed, the hack should be removed.
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return this._subject.observeOn(Rx.Scheduler.immediate).subscribe(
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(value) => {setTimeout(() => generator.next(value));},
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(error) => generator.throw ? generator.throw(error) : null,
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() => generator.return ? generator.return() : null
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);
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}
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toRx():Rx.Observable {
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return this._subject;
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}
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next(value) {
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this._subject.onNext(value);
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}
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throw(error) {
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this._subject.onError(error);
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}
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return(value) {
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this._subject.onCompleted();
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}
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} |