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56 lines
1.8 KiB
Python
56 lines
1.8 KiB
Python
# -*- coding: utf-8 -*-
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# input-remapper - GUI for device specific keyboard mappings
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# Copyright (C) 2022 sezanzeb <proxima@sezanzeb.de>
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#
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# This file is part of input-remapper.
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#
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# input-remapper is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# input-remapper 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
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with input-remapper. If not, see <https://www.gnu.org/licenses/>.
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"""Utility functions."""
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import sys
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from hashlib import md5
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from typing import Optional
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import evdev
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DeviceHash = str
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def is_service() -> bool:
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return sys.argv[0].endswith("input-remapper-service")
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def get_device_hash(device: evdev.InputDevice) -> DeviceHash:
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"""get a unique hash for the given device"""
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# the builtin hash() function can not be used because it is randomly
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# seeded at python startup.
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# a non-cryptographic hash would be faster but there is none in the standard lib
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s = str(device.capabilities(absinfo=False)) + device.name
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return md5(s.encode()).hexdigest().lower()
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def get_evdev_constant_name(type_: int, code: int, *_) -> Optional[str]:
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"""Handy function to get the evdev constant name."""
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# this is more readable than
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# type_, code = event.type_and_code
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# name = evdev.ecodes.bytype[type_][code]
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name = evdev.ecodes.bytype.get(type_, {}).get(code)
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if isinstance(name, list):
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return name[0]
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return name
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