firestar5683
73 lines
2.1 KiB
Python
73 lines
2.1 KiB
Python
from asyncio import Future
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from typing import Any, Callable, Optional, TypeVar, Union
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from reactivex import Observable, abc, from_future
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from reactivex.disposable import CompositeDisposable, SingleAssignmentDisposable
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_T = TypeVar("_T")
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def skip_until_(
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other: Union[Observable[Any], "Future[Any]"]
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) -> Callable[[Observable[_T]], Observable[_T]]:
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"""Returns the values from the source observable sequence only after
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the other observable sequence produces a value.
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Args:
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other: The observable sequence that triggers propagation of
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elements of the source sequence.
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Returns:
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An observable sequence containing the elements of the source
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sequence starting from the point the other sequence triggered
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propagation.
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"""
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if isinstance(other, Future):
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obs: Observable[Any] = from_future(other)
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else:
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obs = other
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def skip_until(source: Observable[_T]) -> Observable[_T]:
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def subscribe(
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observer: abc.ObserverBase[_T],
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scheduler: Optional[abc.SchedulerBase] = None,
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):
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is_open = [False]
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def on_next(left: _T) -> None:
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if is_open[0]:
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observer.on_next(left)
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def on_completed() -> None:
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if is_open[0]:
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observer.on_completed()
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subs = source.subscribe(
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on_next, observer.on_error, on_completed, scheduler=scheduler
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)
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subscriptions = CompositeDisposable(subs)
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right_subscription = SingleAssignmentDisposable()
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subscriptions.add(right_subscription)
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def on_next2(x: Any) -> None:
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is_open[0] = True
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right_subscription.dispose()
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def on_completed2():
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right_subscription.dispose()
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right_subscription.disposable = obs.subscribe(
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on_next2, observer.on_error, on_completed2, scheduler=scheduler
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)
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return subscriptions
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return Observable(subscribe)
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return skip_until
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__all__ = ["skip_until_"]
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