mirror of
https://github.com/sezanzeb/input-remapper
synced 2024-11-04 12:00:16 +00:00
137 lines
3.9 KiB
Python
137 lines
3.9 KiB
Python
#!/usr/bin/python3
|
|
# -*- coding: utf-8 -*-
|
|
# key-mapper - GUI for device specific keyboard mappings
|
|
# Copyright (C) 2021 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/>.
|
|
|
|
|
|
"""Utility functions for all other modules in keymapper.dev"""
|
|
|
|
|
|
import math
|
|
|
|
import evdev
|
|
from evdev.ecodes import EV_KEY, EV_ABS, ABS_X, ABS_Y, ABS_RX, ABS_RY, \
|
|
EV_REL, REL_WHEEL, REL_HWHEEL
|
|
|
|
from keymapper.logger import logger
|
|
from keymapper.config import BUTTONS
|
|
|
|
|
|
# other events for ABS include buttons
|
|
JOYSTICK = [
|
|
evdev.ecodes.ABS_X,
|
|
evdev.ecodes.ABS_Y,
|
|
evdev.ecodes.ABS_RX,
|
|
evdev.ecodes.ABS_RY,
|
|
]
|
|
|
|
|
|
# a third of a quarter circle
|
|
JOYSTICK_BUTTON_THRESHOLD = math.sin((math.pi / 2) / 3 * 1)
|
|
|
|
|
|
def sign(value):
|
|
"""Get the sign of the value, or 0 if 0."""
|
|
if value > 0:
|
|
return 1
|
|
|
|
if value < 0:
|
|
return -1
|
|
|
|
return 0
|
|
|
|
|
|
def should_map_event_as_btn(device, event, mapping):
|
|
"""Does this event describe a button.
|
|
|
|
If it does, this function will make sure its value is one of [-1, 0, 1],
|
|
so that it matches the possible values in a mapping object if needed.
|
|
|
|
If a new kind of event should be mappable to buttons, this is the place
|
|
to add it.
|
|
|
|
Especially important for gamepad events, some of the buttons
|
|
require special rules.
|
|
"""
|
|
if event.type == EV_KEY:
|
|
return True
|
|
|
|
is_mousepad = event.type == EV_ABS and 47 <= event.code <= 61
|
|
if is_mousepad:
|
|
return False
|
|
|
|
if event.type == EV_ABS:
|
|
if event.code in JOYSTICK:
|
|
l_purpose = mapping.get('gamepad.joystick.left_purpose')
|
|
r_purpose = mapping.get('gamepad.joystick.right_purpose')
|
|
|
|
max_abs = get_max_abs(device)
|
|
|
|
if max_abs is None:
|
|
logger.error(
|
|
'Got %s, but max_abs is %s',
|
|
(event.type, event.code, event.value), max_abs
|
|
)
|
|
return False
|
|
|
|
threshold = max_abs * JOYSTICK_BUTTON_THRESHOLD
|
|
triggered = abs(event.value) > threshold
|
|
|
|
if event.code in [ABS_X, ABS_Y] and l_purpose == BUTTONS:
|
|
event.value = sign(event.value) if triggered else 0
|
|
return True
|
|
|
|
if event.code in [ABS_RX, ABS_RY] and r_purpose == BUTTONS:
|
|
event.value = sign(event.value) if triggered else 0
|
|
return True
|
|
else:
|
|
# normalize event numbers to one of -1, 0, +1. Otherwise mapping
|
|
# trigger values that are between 1 and 255 is not possible,
|
|
# because they might skip the 1 when pressed fast enough.
|
|
event.value = sign(event.value)
|
|
return True
|
|
|
|
return False
|
|
|
|
|
|
def get_max_abs(device):
|
|
"""Figure out the maximum value of EV_ABS events of that device.
|
|
|
|
Like joystick movements or triggers.
|
|
"""
|
|
# since input_device.absinfo(EV_ABS).max is too new for (some?) ubuntus,
|
|
# figure out the max value via the capabilities
|
|
capabilities = device.capabilities(absinfo=True)
|
|
|
|
if EV_ABS not in capabilities:
|
|
return None
|
|
|
|
absinfos = [
|
|
entry[1] for entry in
|
|
capabilities[EV_ABS]
|
|
if isinstance(entry, tuple) and isinstance(entry[1], evdev.AbsInfo)
|
|
]
|
|
|
|
if len(absinfos) == 0:
|
|
logger.error('Failed to get max abs of "%s"')
|
|
return None
|
|
|
|
max_abs = absinfos[0].max
|
|
|
|
return max_abs
|