input-remapper/keymapper/X.py

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#!/usr/bin/python3
# -*- coding: utf-8 -*-
# key-mapper - GUI for device specific keyboard mappings
# Copyright (C) 2020 sezanzeb <proxima@hip70890b.de>
#
# This file is part of key-mapper.
#
# key-mapper is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# key-mapper is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with key-mapper. If not, see <https://www.gnu.org/licenses/>.
"""Stuff that interacts with the X Server"""
import re
import subprocess
# mapping of keycode to character, e.g. 38 to the 'A' key of the keyboard.
# This depends on the configured keyboard layout.
# example: 38: "a A a A ae AE ae"
key_mapping = {}
def load_keymapping():
"""Load the current active mapping of keycodes"""
# to get ASCII codes: xmodmap -pk
output = subprocess.check_output(['xmodmap', '-p']).decode()
for line in output.split('\n'):
search = re.search(r'(\d+) = (.+)', line)
if search is not None:
key_mapping[search[0]] = search[1]
def get_xinput_list(type):
"""Run xinput and get the result as list.
Parameters
----------
type : string
Ine of 'id' or 'name'
"""
output = subprocess.check_output(['xinput', 'list', f'--{type}-only'])
return [line for line in output.decode().split('\n') if line != '']
def find_devices():
"""Get a list of (id, name) for each input device."""
# `xinput list`
ids = get_xinput_list('id')
names = get_xinput_list('name')
# names contains duplicates and "Virtual"-somethings, filter those
known_names = []
# TODO remember all IDS? try each one of them for setxkbmap until success?
result = []
for (id, name) in zip(ids, names):
if name not in known_names and not name.startswith('Virtual'):
known_names.append(name)
result.append((id, name))
return result