You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
input-remapper/keymapper/dev/keycode_mapper.py

133 lines
3.8 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/>.
"""Inject a keycode based on the mapping."""
import asyncio
import evdev
from keymapper.logger import logger
from keymapper.dev.ev_abs_mapper import JOYSTICK
# maps mouse buttons to macro instances that have been executed. They may
# still be running or already be done.
active_macros = {}
def should_map_event_as_btn(ev_type, code):
"""Does this event describe a button.
Especially important for gamepad events, some of the buttons
require special rules.
Parameters
----------
ev_type : int
one of evdev.events
code : int
linux keycode
"""
if ev_type == evdev.events.EV_KEY:
return True
if ev_type == evdev.events.EV_ABS and code not in JOYSTICK:
return True
return False
def handle_keycode(code_to_code, macros, event, uinput):
"""Write the mapped keycode or forward unmapped ones.
Parameters
----------
code_to_code : dict
mapping of linux-keycode to linux-keycode
macros : dict
mapping of linux-keycode to _Macro objects
event : evdev.InputEvent
"""
if event.value == 2:
# button-hold event. Linux seems to create them on its own, no need
# to inject them.
return
input_keycode = event.code
input_type = event.type
if input_keycode in macros:
if event.value == 0:
# key-release event. Tell the macro for that keycode
# that the key is released and let it decide what to with that
# information.
macro = active_macros.get(input_keycode)
if macro is not None and macro.holding:
macro.release_key()
if event.value != 1:
# only key-down events trigger macros
return
existing_macro = active_macros.get(input_keycode)
if existing_macro is not None:
# make sure that a duplicate key-down event won't make a
# macro with a hold function run forever. there should always
# be only one active.
if existing_macro.running:
return
macro = macros[input_keycode]
active_macros[input_keycode] = macro
macro.press_key()
logger.spam(
'got code:%s value:%s, maps to macro %s',
input_keycode,
event.value,
macro.code
)
asyncio.ensure_future(macro.run())
return
if input_keycode in code_to_code:
target_keycode = code_to_code[input_keycode]
target_type = evdev.events.EV_KEY
logger.spam(
'got code:%s value:%s event:%s, maps to EV_KEY:%s',
input_keycode,
event.value,
evdev.ecodes.EV[event.type],
target_keycode
)
else:
logger.spam(
'got unmapped code:%s value:%s',
input_keycode,
event.value,
)
target_keycode = input_keycode
target_type = input_type
uinput.write(target_type, target_keycode, event.value)
uinput.syn()