repeatWhen.js 1.8 KB

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  1. import { innerFrom } from '../observable/innerFrom';
  2. import { Subject } from '../Subject';
  3. import { operate } from '../util/lift';
  4. import { createOperatorSubscriber } from './OperatorSubscriber';
  5. export function repeatWhen(notifier) {
  6. return operate(function (source, subscriber) {
  7. var innerSub;
  8. var syncResub = false;
  9. var completions$;
  10. var isNotifierComplete = false;
  11. var isMainComplete = false;
  12. var checkComplete = function () { return isMainComplete && isNotifierComplete && (subscriber.complete(), true); };
  13. var getCompletionSubject = function () {
  14. if (!completions$) {
  15. completions$ = new Subject();
  16. innerFrom(notifier(completions$)).subscribe(createOperatorSubscriber(subscriber, function () {
  17. if (innerSub) {
  18. subscribeForRepeatWhen();
  19. }
  20. else {
  21. syncResub = true;
  22. }
  23. }, function () {
  24. isNotifierComplete = true;
  25. checkComplete();
  26. }));
  27. }
  28. return completions$;
  29. };
  30. var subscribeForRepeatWhen = function () {
  31. isMainComplete = false;
  32. innerSub = source.subscribe(createOperatorSubscriber(subscriber, undefined, function () {
  33. isMainComplete = true;
  34. !checkComplete() && getCompletionSubject().next();
  35. }));
  36. if (syncResub) {
  37. innerSub.unsubscribe();
  38. innerSub = null;
  39. syncResub = false;
  40. subscribeForRepeatWhen();
  41. }
  42. };
  43. subscribeForRepeatWhen();
  44. });
  45. }
  46. //# sourceMappingURL=repeatWhen.js.map