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from typing import ParamSpec, TypeVar, Callable
from ._iter import CruInplaceList, CruList
P = ParamSpec('P')
R = TypeVar('R')
F = Callable[P, R]
class EventHandlerToken:
def __init__(self, event: "Event", handler: F, once: bool = False) -> None:
self._event = event
self._handler = handler
self._once = once
@property
def event(self) -> "Event":
return self._event
@property
def handler(self) -> F:
return self._handler
@property
def once(self) -> bool:
return self._once
class Event:
def __init__(self, name: str) -> None:
self._name = name
self._tokens: CruInplaceList[EventHandlerToken] = CruInplaceList()
def register(self, handler: F, once: bool = False) -> EventHandlerToken:
token = EventHandlerToken(self, handler, once)
self._tokens.append(token)
return token
def unregister(self, *h: EventHandlerToken | F) -> int:
self._tokens.find_all_indices_if(lambda t: )
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