forked from angular/angular
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathasync.ts
More file actions
155 lines (129 loc) · 5 KB
/
async.ts
File metadata and controls
155 lines (129 loc) · 5 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
import {global, noop} from 'angular2/src/facade/lang';
export {PromiseWrapper, PromiseCompleter} from 'angular2/src/facade/promise';
import {Observable} from 'rxjs/Observable';
import {Subject} from 'rxjs/Subject';
import {PromiseObservable} from 'rxjs/observable/PromiseObservable';
import {toPromise} from 'rxjs/operator/toPromise';
export {Observable} from 'rxjs/Observable';
export {Subject} from 'rxjs/Subject';
export class TimerWrapper {
static setTimeout(fn: (...args: any[]) => void, millis: number): number {
return global.setTimeout(fn, millis);
}
static clearTimeout(id: number): void { global.clearTimeout(id); }
static setInterval(fn: (...args: any[]) => void, millis: number): number {
return global.setInterval(fn, millis);
}
static clearInterval(id: number): void { global.clearInterval(id); }
}
export class ObservableWrapper {
// TODO(vsavkin): when we use rxnext, try inferring the generic type from the first arg
static subscribe<T>(emitter: any, onNext: (value: T) => void, onError?: (exception: any) => void,
onComplete: () => void = () => {}): Object {
onError = (typeof onError === "function") && onError || noop;
onComplete = (typeof onComplete === "function") && onComplete || noop;
return emitter.subscribe({next: onNext, error: onError, complete: onComplete});
}
static isObservable(obs: any): boolean { return !!obs.subscribe; }
/**
* Returns whether `obs` has any subscribers listening to events.
*/
static hasSubscribers(obs: EventEmitter<any>): boolean { return obs.observers.length > 0; }
static dispose(subscription: any) { subscription.unsubscribe(); }
/**
* @deprecated - use callEmit() instead
*/
static callNext(emitter: EventEmitter<any>, value: any) { emitter.next(value); }
static callEmit(emitter: EventEmitter<any>, value: any) { emitter.emit(value); }
static callError(emitter: EventEmitter<any>, error: any) { emitter.error(error); }
static callComplete(emitter: EventEmitter<any>) { emitter.complete(); }
static fromPromise(promise: Promise<any>): Observable<any> {
return PromiseObservable.create(promise);
}
static toPromise(obj: Observable<any>): Promise<any> { return toPromise.call(obj); }
}
/**
* Use by directives and components to emit custom Events.
*
* ### Examples
*
* In the following example, `Zippy` alternatively emits `open` and `close` events when its
* title gets clicked:
*
* ```
* @Component({
* selector: 'zippy',
* template: `
* <div class="zippy">
* <div (click)="toggle()">Toggle</div>
* <div [hidden]="!visible">
* <ng-content></ng-content>
* </div>
* </div>`})
* export class Zippy {
* visible: boolean = true;
* @Output() open: EventEmitter<any> = new EventEmitter();
* @Output() close: EventEmitter<any> = new EventEmitter();
*
* toggle() {
* this.visible = !this.visible;
* if (this.visible) {
* this.open.emit(null);
* } else {
* this.close.emit(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<T> extends Subject<T> {
/** @internal */
_isAsync: boolean;
/**
* Creates an instance of [EventEmitter], which depending on [isAsync],
* delivers events synchronously or asynchronously.
*/
constructor(isAsync: boolean = true) {
super();
this._isAsync = isAsync;
}
emit(value: T) { super.next(value); }
/**
* @deprecated - use .emit(value) instead
*/
next(value: any) { super.next(value); }
subscribe(generatorOrNext?: any, error?: any, complete?: any): any {
let schedulerFn;
let errorFn = (err: any) => null;
let completeFn = () => null;
if (generatorOrNext && typeof generatorOrNext === 'object') {
schedulerFn = this._isAsync ? (value) => { setTimeout(() => generatorOrNext.next(value)); } :
(value) => { generatorOrNext.next(value); };
if (generatorOrNext.error) {
errorFn = this._isAsync ? (err) => { setTimeout(() => generatorOrNext.error(err)); } :
(err) => { generatorOrNext.error(err); };
}
if (generatorOrNext.complete) {
completeFn = this._isAsync ? () => { setTimeout(() => generatorOrNext.complete()); } :
() => { generatorOrNext.complete(); };
}
} else {
schedulerFn = this._isAsync ? (value) => { setTimeout(() => generatorOrNext(value)); } :
(value) => { generatorOrNext(value); };
if (error) {
errorFn =
this._isAsync ? (err) => { setTimeout(() => error(err)); } : (err) => { error(err); };
}
if (complete) {
completeFn =
this._isAsync ? () => { setTimeout(() => complete()); } : () => { complete(); };
}
}
return super.subscribe(schedulerFn, errorFn, completeFn);
}
}