exhaustMap.js
2.19 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
import { map } from './map';
import { from } from '../observable/from';
import { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';
export function exhaustMap(project, resultSelector) {
if (resultSelector) {
return (source) => source.pipe(exhaustMap((a, i) => from(project(a, i)).pipe(map((b, ii) => resultSelector(a, b, i, ii)))));
}
return (source) => source.lift(new ExhaustMapOperator(project));
}
class ExhaustMapOperator {
constructor(project) {
this.project = project;
}
call(subscriber, source) {
return source.subscribe(new ExhaustMapSubscriber(subscriber, this.project));
}
}
class ExhaustMapSubscriber extends SimpleOuterSubscriber {
constructor(destination, project) {
super(destination);
this.project = project;
this.hasSubscription = false;
this.hasCompleted = false;
this.index = 0;
}
_next(value) {
if (!this.hasSubscription) {
this.tryNext(value);
}
}
tryNext(value) {
let result;
const index = this.index++;
try {
result = this.project(value, index);
}
catch (err) {
this.destination.error(err);
return;
}
this.hasSubscription = true;
this._innerSub(result);
}
_innerSub(result) {
const innerSubscriber = new SimpleInnerSubscriber(this);
const destination = this.destination;
destination.add(innerSubscriber);
const innerSubscription = innerSubscribe(result, innerSubscriber);
if (innerSubscription !== innerSubscriber) {
destination.add(innerSubscription);
}
}
_complete() {
this.hasCompleted = true;
if (!this.hasSubscription) {
this.destination.complete();
}
this.unsubscribe();
}
notifyNext(innerValue) {
this.destination.next(innerValue);
}
notifyError(err) {
this.destination.error(err);
}
notifyComplete() {
this.hasSubscription = false;
if (this.hasCompleted) {
this.destination.complete();
}
}
}
//# sourceMappingURL=exhaustMap.js.map