.config/coc/extensions/node_modules/coc-prettier/node_modules/rxjs/_esm2015/internal/operators/switchMap.js

   1 import { map } from './map';
   2 import { from } from '../observable/from';
   3 import { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';
   4 export function switchMap(project, resultSelector) {
   5     if (typeof resultSelector === 'function') {
   6         return (source) => source.pipe(switchMap((a, i) => from(project(a, i)).pipe(map((b, ii) => resultSelector(a, b, i, ii)))));
   7     }
   8     return (source) => source.lift(new SwitchMapOperator(project));
   9 }
  10 class SwitchMapOperator {
  11     constructor(project) {
  12         this.project = project;
  13     }
  14     call(subscriber, source) {
  15         return source.subscribe(new SwitchMapSubscriber(subscriber, this.project));
  16     }
  17 }
  18 class SwitchMapSubscriber extends SimpleOuterSubscriber {
  19     constructor(destination, project) {
  20         super(destination);
  21         this.project = project;
  22         this.index = 0;
  23     }
  24     _next(value) {
  25         let result;
  26         const index = this.index++;
  27         try {
  28             result = this.project(value, index);
  29         }
  30         catch (error) {
  31             this.destination.error(error);
  32             return;
  33         }
  34         this._innerSub(result);
  35     }
  36     _innerSub(result) {
  37         const innerSubscription = this.innerSubscription;
  38         if (innerSubscription) {
  39             innerSubscription.unsubscribe();
  40         }
  41         const innerSubscriber = new SimpleInnerSubscriber(this);
  42         const destination = this.destination;
  43         destination.add(innerSubscriber);
  44         this.innerSubscription = innerSubscribe(result, innerSubscriber);
  45         if (this.innerSubscription !== innerSubscriber) {
  46             destination.add(this.innerSubscription);
  47         }
  48     }
  49     _complete() {
  50         const { innerSubscription } = this;
  51         if (!innerSubscription || innerSubscription.closed) {
  52             super._complete();
  53         }
  54         this.unsubscribe();
  55     }
  56     _unsubscribe() {
  57         this.innerSubscription = undefined;
  58     }
  59     notifyComplete() {
  60         this.innerSubscription = undefined;
  61         if (this.isStopped) {
  62             super._complete();
  63         }
  64     }
  65     notifyNext(innerValue) {
  66         this.destination.next(innerValue);
  67     }
  68 }
  69 //# sourceMappingURL=switchMap.js.map