# Copyright (c) Microsoft Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import asyncio
from contextlib import AbstractAsyncContextManager
from types import TracebackType
from typing import Any, Callable, Generic, Optional, Type, TypeVar, Union
from playwright._impl._impl_to_api_mapping import ImplToApiMapping, ImplWrapper
mapping = ImplToApiMapping()
T = TypeVar("T")
Self = TypeVar("Self", bound="AsyncContextManager")
class AsyncEventInfo(Generic[T]):
def __init__(self, future: "asyncio.Future[T]") -> None:
self._future = future
@property
async def value(self) -> T:
return mapping.from_maybe_impl(await self._future)
def _cancel(self) -> None:
self._future.cancel()
def is_done(self) -> bool:
return self._future.done()
class AsyncEventContextManager(Generic[T], AbstractAsyncContextManager):
def __init__(self, future: "asyncio.Future[T]") -> None:
self._event = AsyncEventInfo[T](future)
async def __aenter__(self) -> AsyncEventInfo[T]:
return self._event
async def __aexit__(
self,
exc_type: Optional[Type[BaseException]],
exc_val: Optional[BaseException],
exc_tb: Optional[TracebackType],
) -> None:
if exc_val:
self._event._cancel()
else:
await self._event.value
class AsyncBase(ImplWrapper):
def __init__(self, impl_obj: Any) -> None:
super().__init__(impl_obj)
self._loop = impl_obj._loop
def __str__(self) -> str:
return self._impl_obj.__str__()
def _wrap_handler(
self, handler: Union[Callable[..., Any], Any]
) -> Callable[..., None]:
if callable(handler):
return mapping.wrap_handler(handler)
return handler
def on(self, event: Any, f: Any) -> None:
"""Registers the function ``f`` to the event name ``event``."""
self._impl_obj.on(event, self._wrap_handler(f))
def once(self, event: Any, f: Any) -> None:
"""The same as ``self.on``, except that the listener is automatically
removed after being called.
"""
self._impl_obj.once(event, self._wrap_handler(f))
def remove_listener(self, event: Any, f: Any) -> None:
"""Removes the function ``f`` from ``event``."""
self._impl_obj.remove_listener(event, self._wrap_handler(f))
class AsyncContextManager(AsyncBase):
async def __aenter__(self: Self) -> Self:
return self
async def __aexit__(
self,
exc_type: Type[BaseException],
exc_val: BaseException,
traceback: TracebackType,
) -> None:
await self.close()
async def close(self) -> None: ...