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

   1 import { Subscriber } from '../Subscriber';
   2 import { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';
   3 import { empty } from '../observable/empty';
   4 export function takeLast(count) {
   5     return function takeLastOperatorFunction(source) {
   6         if (count === 0) {
   7             return empty();
   8         }
   9         else {
  10             return source.lift(new TakeLastOperator(count));
  11         }
  12     };
  13 }
  14 class TakeLastOperator {
  15     constructor(total) {
  16         this.total = total;
  17         if (this.total < 0) {
  18             throw new ArgumentOutOfRangeError;
  19         }
  20     }
  21     call(subscriber, source) {
  22         return source.subscribe(new TakeLastSubscriber(subscriber, this.total));
  23     }
  24 }
  25 class TakeLastSubscriber extends Subscriber {
  26     constructor(destination, total) {
  27         super(destination);
  28         this.total = total;
  29         this.ring = new Array();
  30         this.count = 0;
  31     }
  32     _next(value) {
  33         const ring = this.ring;
  34         const total = this.total;
  35         const count = this.count++;
  36         if (ring.length < total) {
  37             ring.push(value);
  38         }
  39         else {
  40             const index = count % total;
  41             ring[index] = value;
  42         }
  43     }
  44     _complete() {
  45         const destination = this.destination;
  46         let count = this.count;
  47         if (count > 0) {
  48             const total = this.count >= this.total ? this.total : this.count;
  49             const ring = this.ring;
  50             for (let i = 0; i < total; i++) {
  51                 const idx = (count++) % total;
  52                 destination.next(ring[idx]);
  53             }
  54         }
  55         destination.complete();
  56     }
  57 }
  58 //# sourceMappingURL=takeLast.js.map