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