152 lines
4.5 KiB
Python
152 lines
4.5 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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import inspect
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import traceback
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from contextlib import AbstractContextManager
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from types import TracebackType
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from typing import (
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Any,
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Callable,
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Coroutine,
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Generator,
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Generic,
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Optional,
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Type,
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TypeVar,
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Union,
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cast,
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)
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import greenlet
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from playwright._impl._helper import Error
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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="SyncContextManager")
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class EventInfo(Generic[T]):
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def __init__(self, sync_base: "SyncBase", future: "asyncio.Future[T]") -> None:
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self._sync_base = sync_base
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self._future = future
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g_self = greenlet.getcurrent()
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self._future.add_done_callback(lambda _: g_self.switch())
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@property
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def value(self) -> T:
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while not self._future.done():
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self._sync_base._dispatcher_fiber.switch()
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asyncio._set_running_loop(self._sync_base._loop)
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exception = self._future.exception()
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if exception:
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raise exception
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return cast(T, mapping.from_maybe_impl(self._future.result()))
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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 EventContextManager(Generic[T], AbstractContextManager):
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def __init__(self, sync_base: "SyncBase", future: "asyncio.Future[T]") -> None:
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self._event = EventInfo[T](sync_base, future)
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def __enter__(self) -> EventInfo[T]:
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return self._event
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def __exit__(
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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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self._event.value
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class SyncBase(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: asyncio.AbstractEventLoop = impl_obj._loop
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self._dispatcher_fiber = impl_obj._dispatcher_fiber
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def __str__(self) -> str:
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return self._impl_obj.__str__()
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def _sync(
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self,
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coro: Union[Coroutine[Any, Any, Any], Generator[Any, Any, Any]],
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) -> Any:
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__tracebackhide__ = True
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if self._loop.is_closed():
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coro.close()
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raise Error("Event loop is closed! Is Playwright already stopped?")
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g_self = greenlet.getcurrent()
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task: asyncio.tasks.Task[Any] = self._loop.create_task(coro)
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setattr(task, "__pw_stack__", inspect.stack(0))
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setattr(task, "__pw_stack_trace__", traceback.extract_stack(limit=10))
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task.add_done_callback(lambda _: g_self.switch())
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while not task.done():
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self._dispatcher_fiber.switch()
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asyncio._set_running_loop(self._loop)
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return task.result()
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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 SyncContextManager(SyncBase):
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def __enter__(self: Self) -> Self:
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return self
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def __exit__(
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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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self.close()
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def close(self) -> None: ...
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