mirror of
https://github.com/sezanzeb/input-remapper
synced 2024-11-02 15:40:19 +00:00
101 lines
3.4 KiB
Python
101 lines
3.4 KiB
Python
#!/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/>.
|
|
|
|
|
|
"""Keeps reading keycodes in the background for the UI to use."""
|
|
|
|
|
|
import evdev
|
|
|
|
from keymapper.logger import logger
|
|
from keymapper.getdevices import get_devices
|
|
|
|
|
|
class _KeycodeReader:
|
|
"""Keeps reading keycodes in the background for the UI to use.
|
|
|
|
When a button was pressed, the newest keycode can be obtained from this
|
|
object. GTK has get_keycode for keyboard keys, but KeycodeReader also
|
|
has knowledge of buttons like the middle-mouse button.
|
|
"""
|
|
def __init__(self):
|
|
self.virtual_devices = []
|
|
|
|
def clear(self):
|
|
"""Next time when reading don't return the previous keycode."""
|
|
# read all of them to clear the buffer or whatever
|
|
for virtual_device in self.virtual_devices:
|
|
while virtual_device.read_one():
|
|
pass
|
|
|
|
def start_reading(self, device):
|
|
"""Tell the evdev lib to start looking for keycodes.
|
|
|
|
If read is called without prior start_reading, no keycodes
|
|
will be available.
|
|
|
|
Parameters
|
|
----------
|
|
device : string
|
|
The name of the device.
|
|
"""
|
|
groups = get_devices(include_keymapper=True)
|
|
for name, group in groups.items():
|
|
# also find stuff like "key-mapper {device}"
|
|
if device not in name:
|
|
return
|
|
|
|
paths = group['paths']
|
|
|
|
# Watch over each one of the potentially multiple devices per
|
|
# hardware
|
|
self.virtual_devices = [
|
|
evdev.InputDevice(path)
|
|
for path in paths
|
|
]
|
|
|
|
logger.debug(
|
|
'Starting reading keycodes from "%s"',
|
|
'", "'.join([device.name for device in self.virtual_devices])
|
|
)
|
|
|
|
def read(self):
|
|
"""Get the newest keycode or None if none was pressed."""
|
|
newest_keycode = None
|
|
for virtual_device in self.virtual_devices:
|
|
while True:
|
|
event = virtual_device.read_one()
|
|
if event is None:
|
|
break
|
|
|
|
if event.type == evdev.ecodes.EV_KEY and event.value == 1:
|
|
logger.spam(
|
|
'got code:%s value:%s',
|
|
event.code + 8, event.value
|
|
)
|
|
# value: 1 for down, 0 for up, 2 for hold.
|
|
# this happens to report key codes that are 8 lower
|
|
# than the ones reported by evtest and used in xkb files
|
|
newest_keycode = event.code + 8
|
|
return newest_keycode
|
|
|
|
|
|
keycode_reader = _KeycodeReader()
|