sampleTime.js 1.8 KB

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  1. /** PURE_IMPORTS_START tslib,_Subscriber,_scheduler_async PURE_IMPORTS_END */
  2. import * as tslib_1 from "tslib";
  3. import { Subscriber } from '../Subscriber';
  4. import { async } from '../scheduler/async';
  5. export function sampleTime(period, scheduler) {
  6. if (scheduler === void 0) {
  7. scheduler = async;
  8. }
  9. return function (source) { return source.lift(new SampleTimeOperator(period, scheduler)); };
  10. }
  11. var SampleTimeOperator = /*@__PURE__*/ (function () {
  12. function SampleTimeOperator(period, scheduler) {
  13. this.period = period;
  14. this.scheduler = scheduler;
  15. }
  16. SampleTimeOperator.prototype.call = function (subscriber, source) {
  17. return source.subscribe(new SampleTimeSubscriber(subscriber, this.period, this.scheduler));
  18. };
  19. return SampleTimeOperator;
  20. }());
  21. var SampleTimeSubscriber = /*@__PURE__*/ (function (_super) {
  22. tslib_1.__extends(SampleTimeSubscriber, _super);
  23. function SampleTimeSubscriber(destination, period, scheduler) {
  24. var _this = _super.call(this, destination) || this;
  25. _this.period = period;
  26. _this.scheduler = scheduler;
  27. _this.hasValue = false;
  28. _this.add(scheduler.schedule(dispatchNotification, period, { subscriber: _this, period: period }));
  29. return _this;
  30. }
  31. SampleTimeSubscriber.prototype._next = function (value) {
  32. this.lastValue = value;
  33. this.hasValue = true;
  34. };
  35. SampleTimeSubscriber.prototype.notifyNext = function () {
  36. if (this.hasValue) {
  37. this.hasValue = false;
  38. this.destination.next(this.lastValue);
  39. }
  40. };
  41. return SampleTimeSubscriber;
  42. }(Subscriber));
  43. function dispatchNotification(state) {
  44. var subscriber = state.subscriber, period = state.period;
  45. subscriber.notifyNext();
  46. this.schedule(state, period);
  47. }
  48. //# sourceMappingURL=sampleTime.js.map