mirror of
https://github.com/sezanzeb/input-remapper
synced 2024-11-18 03:25:52 +00:00
478 lines
16 KiB
Python
478 lines
16 KiB
Python
#!/usr/bin/python3
|
|
# -*- coding: utf-8 -*-
|
|
# key-mapper - GUI for device specific keyboard mappings
|
|
# Copyright (C) 2021 sezanzeb <proxima@sezanzeb.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/>.
|
|
|
|
|
|
"""Starts injecting keycodes based on the configuration.
|
|
|
|
https://github.com/LEW21/pydbus/tree/cc407c8b1d25b7e28a6d661a29f9e661b1c9b964/examples/clientserver # noqa pylint: disable=line-too-long
|
|
"""
|
|
|
|
|
|
import os
|
|
import sys
|
|
import json
|
|
import time
|
|
import atexit
|
|
|
|
from pydbus import SystemBus
|
|
import gi
|
|
|
|
gi.require_version("GLib", "2.0")
|
|
from gi.repository import GLib
|
|
|
|
from keymapper.logger import logger, is_debug
|
|
from keymapper.injection.injector import Injector, UNKNOWN
|
|
from keymapper.mapping import Mapping
|
|
from keymapper.config import config
|
|
from keymapper.system_mapping import system_mapping
|
|
from keymapper.groups import groups
|
|
from keymapper.paths import get_config_path, USER
|
|
|
|
|
|
BUS_NAME = "keymapper.Control"
|
|
# timeout in seconds, see
|
|
# https://github.com/LEW21/pydbus/blob/cc407c8b1d25b7e28a6d661a29f9e661b1c9b964/pydbus/proxy.py
|
|
BUS_TIMEOUT = 10
|
|
|
|
|
|
class AutoloadHistory:
|
|
"""Contains the autoloading history and constraints."""
|
|
|
|
def __init__(self):
|
|
"""Construct this with an empty history."""
|
|
# mapping of device -> (timestamp, preset)
|
|
self._autoload_history = {}
|
|
|
|
def remember(self, group_key, preset):
|
|
"""Remember when this preset was autoloaded for the device."""
|
|
self._autoload_history[group_key] = (time.time(), preset)
|
|
|
|
def forget(self, group_key):
|
|
"""The injection was stopped or started by hand."""
|
|
if group_key in self._autoload_history:
|
|
del self._autoload_history[group_key]
|
|
|
|
def may_autoload(self, group_key, preset):
|
|
"""Check if this autoload would be redundant.
|
|
|
|
This is needed because udev triggers multiple times per hardware
|
|
device, and because it should be possible to stop the injection
|
|
by unplugging the device if the preset goes wrong or if key-mapper
|
|
has some bug that prevents the computer from being controlled.
|
|
|
|
For that unplug and reconnect the device twice within a 15 seconds
|
|
timeframe which will then not ask for autoloading again. Wait 3
|
|
seconds between replugging.
|
|
"""
|
|
if group_key not in self._autoload_history:
|
|
return True
|
|
|
|
if self._autoload_history[group_key][1] != preset:
|
|
return True
|
|
|
|
# bluetooth devices go to standby mode after some time. After a
|
|
# certain time of being disconnected it should be legit to autoload
|
|
# again. It takes 2.5 seconds for me when quickly replugging my usb
|
|
# mouse until the daemon is asked to autoload again. Redundant calls
|
|
# by udev to autoload for the device seem to happen within 0.2
|
|
# seconds in my case.
|
|
now = time.time()
|
|
threshold = 15 # seconds
|
|
if self._autoload_history[group_key][0] < now - threshold:
|
|
return True
|
|
|
|
return False
|
|
|
|
|
|
def remove_timeout(func):
|
|
"""Remove timeout to ensure the call works if the daemon is not a proxy."""
|
|
# the timeout kwarg is a feature of pydbus. This is needed to make tests work
|
|
# that create a Daemon by calling its constructor instead of using pydbus.
|
|
def wrapped(*args, **kwargs):
|
|
if "timeout" in kwargs:
|
|
del kwargs["timeout"]
|
|
|
|
return func(*args, **kwargs)
|
|
|
|
return wrapped
|
|
|
|
|
|
class Daemon:
|
|
"""Starts injecting keycodes based on the configuration.
|
|
|
|
Can be talked to either over dbus or by instantiating it.
|
|
|
|
The Daemon may not have any knowledge about the logged in user, so it
|
|
can't read any config files. It has to be told what to do and will
|
|
continue to do so afterwards, but it can't decide to start injecting
|
|
on its own.
|
|
"""
|
|
|
|
# https://dbus.freedesktop.org/doc/dbus-specification.html#type-system
|
|
dbus = f"""
|
|
<node>
|
|
<interface name='{BUS_NAME}'>
|
|
<method name='stop_injecting'>
|
|
<arg type='s' name='group_key' direction='in'/>
|
|
</method>
|
|
<method name='get_state'>
|
|
<arg type='s' name='group_key' direction='in'/>
|
|
<arg type='i' name='response' direction='out'/>
|
|
</method>
|
|
<method name='start_injecting'>
|
|
<arg type='s' name='group_key' direction='in'/>
|
|
<arg type='s' name='preset' direction='in'/>
|
|
<arg type='b' name='response' direction='out'/>
|
|
</method>
|
|
<method name='stop_all'>
|
|
</method>
|
|
<method name='set_config_dir'>
|
|
<arg type='s' name='config_dir' direction='in'/>
|
|
</method>
|
|
<method name='autoload'>
|
|
</method>
|
|
<method name='autoload_single'>
|
|
<arg type='s' name='group_key' direction='in'/>
|
|
</method>
|
|
<method name='hello'>
|
|
<arg type='s' name='out' direction='in'/>
|
|
<arg type='s' name='response' direction='out'/>
|
|
</method>
|
|
</interface>
|
|
</node>
|
|
"""
|
|
|
|
def __init__(self):
|
|
"""Constructs the daemon."""
|
|
logger.debug("Creating daemon")
|
|
self.injectors = {}
|
|
|
|
self.config_dir = None
|
|
|
|
if USER != "root":
|
|
self.set_config_dir(get_config_path())
|
|
|
|
self.autoload_history = AutoloadHistory()
|
|
self.refreshed_devices_at = 0
|
|
|
|
atexit.register(self.stop_all)
|
|
|
|
@classmethod
|
|
def connect(cls, fallback=True):
|
|
"""Get an interface to start and stop injecting keystrokes.
|
|
|
|
Parameters
|
|
----------
|
|
fallback : bool
|
|
If true, returns an instance of the daemon instead if it cannot
|
|
connect
|
|
"""
|
|
try:
|
|
bus = SystemBus()
|
|
interface = bus.get(BUS_NAME, timeout=BUS_TIMEOUT)
|
|
logger.info("Connected to the service")
|
|
except GLib.GError as error:
|
|
if not fallback:
|
|
logger.error("Service not running? %s", error)
|
|
return None
|
|
|
|
logger.info("Starting the service")
|
|
# Blocks until pkexec is done asking for the password.
|
|
# Runs via key-mapper-control so that auth_admin_keep works
|
|
# for all pkexec calls of the gui
|
|
debug = " -d" if is_debug() else ""
|
|
cmd = f"pkexec key-mapper-control --command start-daemon {debug}"
|
|
|
|
# using pkexec will also cause the service to continue running in
|
|
# the background after the gui has been closed, which will keep
|
|
# the injections ongoing
|
|
|
|
logger.debug("Running `%s`", cmd)
|
|
os.system(cmd)
|
|
time.sleep(0.2)
|
|
|
|
# try a few times if the service was just started
|
|
for attempt in range(3):
|
|
try:
|
|
interface = bus.get(BUS_NAME, timeout=BUS_TIMEOUT)
|
|
break
|
|
except GLib.GError as error:
|
|
logger.debug(
|
|
'Attempt %d to connect to the service failed: "%s"',
|
|
attempt + 1,
|
|
error,
|
|
)
|
|
time.sleep(0.2)
|
|
else:
|
|
logger.error("Failed to connect to the service")
|
|
sys.exit(1)
|
|
|
|
if USER != "root":
|
|
config_path = get_config_path()
|
|
logger.debug('Telling service about "%s"', config_path)
|
|
interface.set_config_dir(get_config_path())
|
|
|
|
return interface
|
|
|
|
def publish(self):
|
|
"""Make the dbus interface available."""
|
|
bus = SystemBus()
|
|
try:
|
|
bus.publish(BUS_NAME, self)
|
|
except RuntimeError as error:
|
|
logger.error("Is the service already running? (%s)", str(error))
|
|
sys.exit(1)
|
|
|
|
def run(self):
|
|
"""Start the daemons loop. Blocks until the daemon stops."""
|
|
loop = GLib.MainLoop()
|
|
logger.debug("Running daemon")
|
|
loop.run()
|
|
|
|
def refresh(self, group_key=None):
|
|
"""Refresh groups if the specified group is unknown.
|
|
|
|
Parameters
|
|
----------
|
|
group_key : str
|
|
unique identifier used by the groups object
|
|
"""
|
|
now = time.time()
|
|
if now - 10 > self.refreshed_devices_at:
|
|
logger.debug("Refreshing because last info is too old")
|
|
groups.refresh()
|
|
self.refreshed_devices_at = now
|
|
return
|
|
|
|
if not groups.find(key=group_key):
|
|
logger.debug('Refreshing because "%s" is unknown', group_key)
|
|
groups.refresh()
|
|
self.refreshed_devices_at = now
|
|
|
|
def stop_injecting(self, group_key):
|
|
"""Stop injecting the mapping for a single device."""
|
|
if self.injectors.get(group_key) is None:
|
|
logger.debug(
|
|
'Tried to stop injector, but none is running for group "%s"', group_key
|
|
)
|
|
return
|
|
|
|
self.injectors[group_key].stop_injecting()
|
|
self.autoload_history.forget(group_key)
|
|
|
|
def get_state(self, group_key):
|
|
"""Get the injectors state."""
|
|
injector = self.injectors.get(group_key)
|
|
return injector.get_state() if injector else UNKNOWN
|
|
|
|
def set_config_dir(self, config_dir):
|
|
"""All future operations will use this config dir.
|
|
|
|
Existing injections (possibly of the previous user) will be kept
|
|
alive, call stop_all to stop them.
|
|
|
|
Parameters
|
|
----------
|
|
config_dir : string
|
|
This path contains config.json, xmodmap.json and the
|
|
presets directory
|
|
"""
|
|
config_path = os.path.join(config_dir, "config.json")
|
|
if not os.path.exists(config_path):
|
|
logger.error('"%s" does not exist', config_path)
|
|
return
|
|
|
|
self.config_dir = config_dir
|
|
config.load_config(config_path)
|
|
|
|
def _autoload(self, group_key):
|
|
"""Check if autoloading is a good idea, and if so do it.
|
|
|
|
Parameters
|
|
----------
|
|
group_key : str
|
|
unique identifier used by the groups object
|
|
"""
|
|
self.refresh(group_key)
|
|
|
|
group = groups.find(key=group_key)
|
|
if group is None:
|
|
# even after groups.refresh, the device is unknown, so it's
|
|
# either not relevant for key-mapper, or not connected yet
|
|
return
|
|
|
|
preset = config.get(["autoload", group.key], log_unknown=False)
|
|
|
|
if preset is None:
|
|
# no autoloading is configured for this device
|
|
return
|
|
|
|
if not isinstance(preset, str):
|
|
# might be broken due to a previous bug
|
|
config.remove(["autoload", group.key])
|
|
config.save_config()
|
|
return
|
|
|
|
logger.info('Autoloading for "%s"', group.key)
|
|
|
|
if not self.autoload_history.may_autoload(group.key, preset):
|
|
logger.info(
|
|
'Not autoloading the same preset "%s" again for group "%s"',
|
|
preset,
|
|
group.key,
|
|
)
|
|
return
|
|
|
|
self.start_injecting(group.key, preset)
|
|
self.autoload_history.remember(group.key, preset)
|
|
|
|
@remove_timeout
|
|
def autoload_single(self, group_key):
|
|
"""Inject the configured autoload preset for the device.
|
|
|
|
If the preset is already being injected, it won't autoload it again.
|
|
|
|
Parameters
|
|
----------
|
|
group_key : str
|
|
unique identifier used by the groups object
|
|
"""
|
|
# avoid some confusing logs and filter obviously invalid requests
|
|
if group_key.startswith("key-mapper"):
|
|
return
|
|
|
|
logger.info('Request to autoload for "%s"', group_key)
|
|
|
|
if self.config_dir is None:
|
|
# spams on boot, when no user is logged in yet
|
|
logger.debug(
|
|
'Tried to autoload "%s" without configuring the daemon '
|
|
"first via set_config_dir.",
|
|
group_key,
|
|
)
|
|
return
|
|
|
|
self._autoload(group_key)
|
|
|
|
@remove_timeout
|
|
def autoload(self):
|
|
"""Load all autoloaded presets for the current config_dir.
|
|
|
|
If the preset is already being injected, it won't autoload it again.
|
|
"""
|
|
if self.config_dir is None:
|
|
logger.error(
|
|
"Tried to autoload without configuring the daemon first "
|
|
"via set_config_dir."
|
|
)
|
|
return
|
|
|
|
autoload_presets = list(config.iterate_autoload_presets())
|
|
|
|
logger.info("Autoloading for all devices")
|
|
|
|
if len(autoload_presets) == 0:
|
|
logger.error("No presets configured to autoload")
|
|
return
|
|
|
|
for group_key, _ in autoload_presets:
|
|
self._autoload(group_key)
|
|
|
|
def start_injecting(self, group_key, preset):
|
|
"""Start injecting the preset for the device.
|
|
|
|
Returns True on success. If an injection is already ongoing for
|
|
the specified device it will stop it automatically first.
|
|
|
|
Parameters
|
|
----------
|
|
group_key : string
|
|
The unique key of the group
|
|
preset : string
|
|
The name of the preset
|
|
"""
|
|
self.refresh(group_key)
|
|
|
|
if self.config_dir is None:
|
|
logger.error(
|
|
"Tried to start an injection without configuring the daemon "
|
|
"first via set_config_dir."
|
|
)
|
|
return False
|
|
|
|
group = groups.find(key=group_key)
|
|
|
|
if group is None:
|
|
logger.error('Could not find group "%s"', group_key)
|
|
return False
|
|
|
|
preset_path = os.path.join(
|
|
self.config_dir, "presets", group.name, f"{preset}.json"
|
|
)
|
|
|
|
mapping = Mapping()
|
|
try:
|
|
mapping.load(preset_path)
|
|
except FileNotFoundError as error:
|
|
logger.error(str(error))
|
|
return False
|
|
|
|
if self.injectors.get(group_key) is not None:
|
|
self.stop_injecting(group_key)
|
|
|
|
# Path to a dump of the xkb mappings, to provide more human
|
|
# readable keys in the correct keyboard layout to the service.
|
|
# The service cannot use `xmodmap -pke` because it's running via
|
|
# systemd.
|
|
xmodmap_path = os.path.join(self.config_dir, "xmodmap.json")
|
|
try:
|
|
with open(xmodmap_path, "r") as file:
|
|
# do this for each injection to make sure it is up to
|
|
# date when the system layout changes.
|
|
xmodmap = json.load(file)
|
|
logger.debug('Using keycodes from "%s"', xmodmap_path)
|
|
system_mapping.update(xmodmap)
|
|
# the service now has process wide knowledge of xmodmap
|
|
# keys of the users session
|
|
except FileNotFoundError:
|
|
logger.error('Could not find "%s"', xmodmap_path)
|
|
|
|
try:
|
|
injector = Injector(group, mapping)
|
|
injector.start()
|
|
self.injectors[group.key] = injector
|
|
except OSError:
|
|
# I think this will never happen, probably leftover from
|
|
# some earlier version
|
|
return False
|
|
|
|
return True
|
|
|
|
def stop_all(self):
|
|
"""Stop all injections."""
|
|
logger.info("Stopping all injections")
|
|
for group_key in list(self.injectors.keys()):
|
|
self.stop_injecting(group_key)
|
|
|
|
def hello(self, out):
|
|
"""Used for tests."""
|
|
logger.info('Received "%s" from client', out)
|
|
return out
|