67 lines
2.0 KiB
Python
67 lines
2.0 KiB
Python
"""
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Copyright 2009, Linden Research, Inc.
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See NOTICE.md for previous contributors
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Copyright 2021, Salad Dais
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All Rights Reserved.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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"""
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from __future__ import annotations
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import dataclasses
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from typing import *
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_T = TypeVar("_T")
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class SettingDescriptor(Generic[_T]):
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__slots__ = ("name", "default")
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def __init__(self, default: Union[Callable[[], _T], _T]):
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self.default = default
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self.name: Optional[str] = None
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def __set_name__(self, owner: Settings, name: str):
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self.name = name
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def _make_default(self) -> _T:
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if callable(self.default):
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return self.default()
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return self.default
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def __get__(self, obj: Settings, owner: Optional[Type] = None) -> _T:
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val: Union[_T, dataclasses.MISSING] = obj.get_setting(self.name)
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if val is dataclasses.MISSING:
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val = self._make_default()
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return val
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def __set__(self, obj: Settings, value: _T) -> None:
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obj.set_setting(self.name, value)
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class Settings:
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ENABLE_DEFERRED_PACKET_PARSING: bool = SettingDescriptor(True)
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def __init__(self):
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self._settings: Dict[str, Any] = {}
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def get_setting(self, name: str) -> Any:
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return self._settings.get(name, dataclasses.MISSING)
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def set_setting(self, name: str, val: Any):
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self._settings[name] = val
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