|
|
|
#!/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 injecting keycodes in the background based on the mapping."""
|
|
|
|
|
|
|
|
|
|
|
|
import re
|
|
|
|
import asyncio
|
|
|
|
import time
|
|
|
|
import subprocess
|
|
|
|
import multiprocessing
|
|
|
|
|
|
|
|
import evdev
|
|
|
|
from evdev.ecodes import EV_KEY, EV_ABS, EV_REL
|
|
|
|
|
|
|
|
from keymapper.logger import logger
|
|
|
|
from keymapper.getdevices import get_devices
|
|
|
|
from keymapper.state import system_mapping
|
|
|
|
from keymapper.dev.keycode_mapper import handle_keycode, \
|
|
|
|
should_map_event_as_btn
|
|
|
|
from keymapper.dev.ev_abs_mapper import ev_abs_mapper, JOYSTICK
|
|
|
|
from keymapper.dev.macros import parse, is_this_a_macro
|
|
|
|
|
|
|
|
|
|
|
|
DEV_NAME = 'key-mapper'
|
|
|
|
CLOSE = 0
|
|
|
|
|
|
|
|
|
|
|
|
def is_numlock_on():
|
|
|
|
"""Get the current state of the numlock."""
|
|
|
|
xset_q = subprocess.check_output(['xset', 'q']).decode()
|
|
|
|
num_lock_status = re.search(
|
|
|
|
r'Num Lock:\s+(.+?)\s',
|
|
|
|
xset_q
|
|
|
|
)
|
|
|
|
|
|
|
|
if num_lock_status is not None:
|
|
|
|
return num_lock_status[1] == 'on'
|
|
|
|
|
|
|
|
return False
|
|
|
|
|
|
|
|
|
|
|
|
def toggle_numlock():
|
|
|
|
"""Turn the numlock on or off."""
|
|
|
|
try:
|
|
|
|
subprocess.check_output(['numlockx', 'toggle'])
|
|
|
|
except FileNotFoundError:
|
|
|
|
# doesn't seem to be installed everywhere
|
|
|
|
logger.debug('numlockx not found')
|
|
|
|
|
|
|
|
|
|
|
|
def ensure_numlock(func):
|
|
|
|
"""Decorator to reset the numlock to its initial state afterwards."""
|
|
|
|
def wrapped(*args, **kwargs):
|
|
|
|
# for some reason, grabbing a device can modify the num lock state.
|
|
|
|
# remember it and apply back later
|
|
|
|
numlock_before = is_numlock_on()
|
|
|
|
result = func(*args, **kwargs)
|
|
|
|
numlock_after = is_numlock_on()
|
|
|
|
if numlock_after != numlock_before:
|
|
|
|
logger.debug('Reverting numlock status to %s', numlock_before)
|
|
|
|
toggle_numlock()
|
|
|
|
return result
|
|
|
|
return wrapped
|
|
|
|
|
|
|
|
|
|
|
|
class KeycodeInjector:
|
|
|
|
"""Keeps injecting keycodes in the background based on the mapping.
|
|
|
|
|
|
|
|
Is a process to make it non-blocking for the rest of the code and to
|
|
|
|
make running multiple injector easier. There is one procss per
|
|
|
|
hardware-device that is being mapped.
|
|
|
|
"""
|
|
|
|
def __init__(self, device, mapping):
|
|
|
|
"""Start injecting keycodes based on custom_mapping.
|
|
|
|
|
|
|
|
Parameters
|
|
|
|
----------
|
|
|
|
device : string
|
|
|
|
the name of the device as available in get_device
|
|
|
|
"""
|
|
|
|
self.device = device
|
|
|
|
self.mapping = mapping
|
|
|
|
self._process = None
|
|
|
|
self._msg_pipe = multiprocessing.Pipe()
|
|
|
|
self._code_to_code = self._map_codes_to_codes()
|
|
|
|
self.stopped = False
|
|
|
|
|
|
|
|
# when moving the joystick and then staying at a position, no
|
|
|
|
# events will be written anymore. Remember the last value the
|
|
|
|
# joystick reported, because it is still remaining at that
|
|
|
|
# position.
|
|
|
|
self.abs_state = [0, 0, 0, 0]
|
|
|
|
|
|
|
|
def _map_codes_to_codes(self):
|
|
|
|
"""To quickly get target keycodes during operation."""
|
|
|
|
_code_to_code = {}
|
|
|
|
for (_, keycode), output in self.mapping:
|
|
|
|
if is_this_a_macro(output):
|
|
|
|
continue
|
|
|
|
|
|
|
|
target_keycode = system_mapping.get(output)
|
|
|
|
if target_keycode is None:
|
|
|
|
logger.error('Don\'t know what %s is', output)
|
|
|
|
continue
|
|
|
|
|
|
|
|
_code_to_code[keycode] = target_keycode
|
|
|
|
return _code_to_code
|
|
|
|
|
|
|
|
def start_injecting(self):
|
|
|
|
"""Start injecting keycodes."""
|
|
|
|
if self.stopped or self._process is not None:
|
|
|
|
# So that there is less concern about integrity when putting
|
|
|
|
# stuff into self. Each injector object can only be
|
|
|
|
# started once.
|
|
|
|
raise Exception('Please construct a new injector instead')
|
|
|
|
|
|
|
|
if self.device not in get_devices():
|
|
|
|
logger.error('Cannot inject for unknown device "%s"', self.device)
|
|
|
|
return
|
|
|
|
|
|
|
|
self._process = multiprocessing.Process(target=self._start_injecting)
|
|
|
|
self._process.start()
|
|
|
|
|
|
|
|
def map_abs_to_rel(self, capabilities):
|
|
|
|
"""Check if joystick movements can and should be mapped."""
|
|
|
|
# mapping buttons only works without ABS events in the capabilities,
|
|
|
|
# possibly due to some intentional constraints in the os. So always
|
|
|
|
# do this without the option to configure, if it is possible.
|
|
|
|
return evdev.ecodes.ABS_X in capabilities.get(EV_ABS, [])
|
|
|
|
|
|
|
|
def _prepare_device(self, path):
|
|
|
|
"""Try to grab the device, return if not needed/possible.
|
|
|
|
|
|
|
|
Also return if ABS events are changed to REL mouse movements,
|
|
|
|
because the capabilities of the returned device are changed
|
|
|
|
so this cannot be checked later anymore.
|
|
|
|
"""
|
|
|
|
try:
|
|
|
|
device = evdev.InputDevice(path)
|
|
|
|
except FileNotFoundError:
|
|
|
|
return None, False
|
|
|
|
|
|
|
|
capabilities = device.capabilities(absinfo=False)
|
|
|
|
|
|
|
|
needed = False
|
|
|
|
for (ev_type, keycode), _ in self.mapping:
|
|
|
|
if keycode in capabilities.get(ev_type, []):
|
|
|
|
needed = True
|
|
|
|
break
|
|
|
|
|
|
|
|
abs_to_rel = self.map_abs_to_rel(capabilities)
|
|
|
|
|
|
|
|
if abs_to_rel:
|
|
|
|
needed = True
|
|
|
|
|
|
|
|
if not needed:
|
|
|
|
# skipping reading and checking on events from those devices
|
|
|
|
# may be beneficial for performance.
|
|
|
|
logger.debug('No need to grab %s', path)
|
|
|
|
return None, False
|
|
|
|
|
|
|
|
attempts = 0
|
|
|
|
while True:
|
|
|
|
try:
|
|
|
|
# grab to avoid e.g. the disabled keycode of 10 to confuse
|
|
|
|
# X, especially when one of the buttons of your mouse also
|
|
|
|
# uses 10. This also avoids having to load an empty xkb
|
|
|
|
# symbols file to prevent writing any unwanted keys.
|
|
|
|
device.grab()
|
|
|
|
logger.debug('Grab %s', path)
|
|
|
|
break
|
|
|
|
except IOError:
|
|
|
|
attempts += 1
|
|
|
|
# it might take a little time until the device is free if
|
|
|
|
# it was previously grabbed.
|
|
|
|
logger.debug('Failed attemts to grab %s: %d', path, attempts)
|
|
|
|
|
|
|
|
if attempts >= 4:
|
|
|
|
logger.error('Cannot grab %s, it is possibly in use', path)
|
|
|
|
return None, False
|
|
|
|
|
|
|
|
time.sleep(0.15)
|
|
|
|
|
|
|
|
return device, abs_to_rel
|
|
|
|
|
|
|
|
def _modify_capabilities(self, macros, input_device, abs_to_rel):
|
|
|
|
"""Adds all used keycodes into a copy of a devices capabilities.
|
|
|
|
|
|
|
|
A device with those capabilities can do exactly the stuff it needs
|
|
|
|
to perform all mappings and macros.
|
|
|
|
|
|
|
|
Prameters
|
|
|
|
---------
|
|
|
|
macros : dict
|
|
|
|
maping of int to _Macro
|
|
|
|
input_device : evdev.InputDevice
|
|
|
|
abs_to_rel : bool
|
|
|
|
if ABS capabilities should be removed in favor of REL
|
|
|
|
"""
|
|
|
|
ecodes = evdev.ecodes
|
|
|
|
|
|
|
|
# copy the capabilities because the uinput is going
|
|
|
|
# to act like the device.
|
|
|
|
capabilities = input_device.capabilities(absinfo=False)
|
|
|
|
|
|
|
|
if len(self._code_to_code) > 0 or len(macros) > 0:
|
|
|
|
if capabilities.get(EV_KEY) is None:
|
|
|
|
capabilities[EV_KEY] = []
|
|
|
|
|
|
|
|
# Furthermore, support all injected keycodes
|
|
|
|
for keycode in self._code_to_code.values():
|
|
|
|
if keycode not in capabilities[EV_KEY]:
|
|
|
|
capabilities[EV_KEY].append(keycode)
|
|
|
|
|
|
|
|
# and all keycodes that are injected by macros
|
|
|
|
for macro in macros.values():
|
|
|
|
capabilities[EV_KEY] += list(macro.get_capabilities())
|
|
|
|
|
|
|
|
if abs_to_rel:
|
|
|
|
del capabilities[EV_ABS]
|
|
|
|
# those are the requirements to recognize it as mouse
|
|
|
|
# on my system. REL_X and REL_Y are of course required to
|
|
|
|
# accept the events that the mouse-movement-mapper writes.
|
|
|
|
capabilities[EV_REL] = [
|
|
|
|
evdev.ecodes.REL_X,
|
|
|
|
evdev.ecodes.REL_Y,
|
|
|
|
evdev.ecodes.REL_WHEEL,
|
|
|
|
]
|
|
|
|
if capabilities.get(EV_KEY) is None:
|
|
|
|
capabilities[EV_KEY] = []
|
|
|
|
# for reasons I don't know, it is also required to have
|
|
|
|
# any keyboard button in capabilities.
|
|
|
|
capabilities[EV_KEY].append(ecodes.KEY_0)
|
|
|
|
|
|
|
|
# just like what python-evdev does in from_device
|
|
|
|
if ecodes.EV_SYN in capabilities:
|
|
|
|
del capabilities[ecodes.EV_SYN]
|
|
|
|
if ecodes.EV_FF in capabilities:
|
|
|
|
del capabilities[ecodes.EV_FF]
|
|
|
|
|
|
|
|
return capabilities
|
|
|
|
|
|
|
|
async def _msg_listener(self, loop):
|
|
|
|
"""Wait for messages from the main process to do special stuff."""
|
|
|
|
while True:
|
|
|
|
frame_available = asyncio.Event()
|
|
|
|
loop.add_reader(self._msg_pipe[0].fileno(), frame_available.set)
|
|
|
|
await frame_available.wait()
|
|
|
|
frame_available.clear()
|
|
|
|
msg = self._msg_pipe[0].recv()
|
|
|
|
if msg == CLOSE:
|
|
|
|
logger.debug('Received close signal')
|
|
|
|
# stop the event loop and cause the process to reach its end
|
|
|
|
# cleanly. Using .terminate prevents coverage from working.
|
|
|
|
loop.stop()
|
|
|
|
return
|
|
|
|
|
|
|
|
def _start_injecting(self):
|
|
|
|
"""The injection worker that keeps injecting until terminated.
|
|
|
|
|
|
|
|
Stuff is non-blocking by using asyncio in order to do multiple things
|
|
|
|
somewhat concurrently.
|
|
|
|
"""
|
|
|
|
loop = asyncio.get_event_loop()
|
|
|
|
coroutines = []
|
|
|
|
|
|
|
|
logger.info('Starting injecting the mapping for "%s"', self.device)
|
|
|
|
|
|
|
|
paths = get_devices()[self.device]['paths']
|
|
|
|
|
|
|
|
# Watch over each one of the potentially multiple devices per hardware
|
|
|
|
for path in paths:
|
|
|
|
source, abs_to_rel = self._prepare_device(path)
|
|
|
|
if source is None:
|
|
|
|
continue
|
|
|
|
|
|
|
|
# each device parses the macros with a different handler
|
|
|
|
logger.debug('Parsing macros for %s', path)
|
|
|
|
macros = {}
|
|
|
|
for (_, keycode), output in self.mapping:
|
|
|
|
if is_this_a_macro(output):
|
|
|
|
macro = parse(output)
|
|
|
|
if macro is None:
|
|
|
|
continue
|
|
|
|
|
|
|
|
macros[keycode] = macro
|
|
|
|
|
|
|
|
# certain capabilities can have side effects apparently. with an
|
|
|
|
# EV_ABS capability, EV_REL won't move the mouse pointer anymore.
|
|
|
|
# so don't merge all InputDevices into one UInput device.
|
|
|
|
uinput = evdev.UInput(
|
|
|
|
name=f'{DEV_NAME} {self.device}',
|
|
|
|
phys=DEV_NAME,
|
|
|
|
events=self._modify_capabilities(macros, source, abs_to_rel)
|
|
|
|
)
|
|
|
|
|
|
|
|
def handler(*args, uinput=uinput):
|
|
|
|
# this ensures that the right uinput is used for macro_write,
|
|
|
|
# because this is within a loop
|
|
|
|
self._macro_write(*args, uinput)
|
|
|
|
|
|
|
|
for macro in macros.values():
|
|
|
|
macro.set_handler(handler)
|
|
|
|
|
|
|
|
# keycode injection
|
|
|
|
coroutine = self._keycode_loop(macros, source, uinput, abs_to_rel)
|
|
|
|
coroutines.append(coroutine)
|
|
|
|
|
|
|
|
# mouse movement injection
|
|
|
|
if abs_to_rel:
|
|
|
|
self.abs_state[0] = 0
|
|
|
|
self.abs_state[1] = 0
|
|
|
|
coroutine = ev_abs_mapper(self.abs_state, source, uinput)
|
|
|
|
coroutines.append(coroutine)
|
|
|
|
|
|
|
|
if len(coroutines) == 0:
|
|
|
|
logger.error('Did not grab any device')
|
|
|
|
return
|
|
|
|
|
|
|
|
coroutines.append(self._msg_listener(loop))
|
|
|
|
|
|
|
|
try:
|
|
|
|
loop.run_until_complete(asyncio.gather(*coroutines))
|
|
|
|
except RuntimeError:
|
|
|
|
# stopped event loop most likely
|
|
|
|
pass
|
|
|
|
|
|
|
|
if len(coroutines) > 0:
|
|
|
|
logger.debug('asyncio coroutines ended')
|
|
|
|
|
|
|
|
def _macro_write(self, code, value, uinput):
|
|
|
|
"""Handler for macros."""
|
|
|
|
logger.spam('macro writes code:%s value:%d', code, value)
|
|
|
|
uinput.write(EV_KEY, code, value)
|
|
|
|
uinput.syn()
|
|
|
|
|
|
|
|
async def _keycode_loop(self, macros, source, uinput, abs_to_rel):
|
|
|
|
"""Inject keycodes for one of the virtual devices.
|
|
|
|
|
|
|
|
Can be stopped by stopping the asyncio loop.
|
|
|
|
|
|
|
|
Parameters
|
|
|
|
----------
|
|
|
|
macros : int -> _Macro
|
|
|
|
macro with a handler that writes to the provided uinput
|
|
|
|
source : evdev.InputDevice
|
|
|
|
where to read keycodes from
|
|
|
|
uinput : evdev.UInput
|
|
|
|
where to write keycodes to
|
|
|
|
abs_to_rel : bool
|
|
|
|
if joystick events should be mapped to mouse movements
|
|
|
|
"""
|
|
|
|
logger.debug(
|
|
|
|
'Started injecting into %s, fd %s',
|
|
|
|
uinput.device.path, uinput.fd
|
|
|
|
)
|
|
|
|
|
|
|
|
async for event in source.async_read_loop():
|
|
|
|
if abs_to_rel and event.type == EV_ABS and event.code in JOYSTICK:
|
|
|
|
if event.code == evdev.ecodes.ABS_X:
|
|
|
|
self.abs_state[0] = event.value
|
|
|
|
elif event.code == evdev.ecodes.ABS_Y:
|
|
|
|
self.abs_state[1] = event.value
|
|
|
|
elif event.code == evdev.ecodes.ABS_RX:
|
|
|
|
self.abs_state[2] = event.value
|
|
|
|
elif event.code == evdev.ecodes.ABS_RY:
|
|
|
|
self.abs_state[3] = event.value
|
|
|
|
continue
|
|
|
|
|
|
|
|
if should_map_event_as_btn(event.type, event.code):
|
|
|
|
handle_keycode(self._code_to_code, macros, event, uinput)
|
|
|
|
continue
|
|
|
|
|
|
|
|
# forward the rest
|
|
|
|
uinput.write(event.type, event.code, event.value)
|
|
|
|
# this already includes SYN events, so need to syn here again
|
|
|
|
continue
|
|
|
|
|
|
|
|
logger.error(
|
|
|
|
'The injector for "%s" stopped early',
|
|
|
|
uinput.device.path
|
|
|
|
)
|
|
|
|
|
|
|
|
@ensure_numlock
|
|
|
|
def stop_injecting(self):
|
|
|
|
"""Stop injecting keycodes."""
|
|
|
|
logger.info('Stopping injecting keycodes for device "%s"', self.device)
|
|
|
|
self._msg_pipe[1].send(CLOSE)
|
|
|
|
self.stopped = True
|