mirror of
https://github.com/sezanzeb/input-remapper
synced 2024-11-02 15:40:19 +00:00
301 lines
9.7 KiB
Python
301 lines
9.7 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/>.
|
|
|
|
|
|
"""Contains and manages mappings."""
|
|
|
|
|
|
import os
|
|
import json
|
|
import itertools
|
|
import copy
|
|
|
|
from keymapper.logger import logger
|
|
from keymapper.paths import touch
|
|
from keymapper.config import ConfigBase, config
|
|
|
|
|
|
def verify_key(key):
|
|
"""Check if the key describes a tuple or tuples of (type, code, value).
|
|
|
|
For combinations it could be e.g. ((1, 2, 1), (1, 3, 1)).
|
|
"""
|
|
if not isinstance(key, tuple):
|
|
raise ValueError(f'Expected keys to be a 3-tuple, but got {key}')
|
|
|
|
if isinstance(key[0], tuple):
|
|
for sub_key in key:
|
|
verify_key(sub_key)
|
|
else:
|
|
if len(key) != 3:
|
|
raise ValueError(f'Expected key to be a 3-tuple, but got {key}')
|
|
if sum([not isinstance(value, int) for value in key]) != 0:
|
|
raise ValueError(f'Can only use numbers, but got {key}')
|
|
|
|
|
|
def split_key(key):
|
|
"""Take a key like "1,2,3" and return a 3-tuple of ints."""
|
|
if ',' not in key:
|
|
logger.error('Found invalid key: "%s"', key)
|
|
return None
|
|
|
|
if key.count(',') == 1:
|
|
# support for legacy mapping objects that didn't include
|
|
# the value in the key
|
|
ev_type, code = key.split(',')
|
|
value = 1
|
|
elif key.count(',') == 2:
|
|
ev_type, code, value = key.split(',')
|
|
else:
|
|
logger.error('Found more than two commas in the key: "%s"', key)
|
|
return None
|
|
|
|
try:
|
|
key = (int(ev_type), int(code), int(value))
|
|
except ValueError:
|
|
logger.error('Found non-int in: "%s"', key)
|
|
return None
|
|
|
|
return key
|
|
|
|
|
|
class Mapping(ConfigBase):
|
|
"""Contains and manages mappings and config of a single preset."""
|
|
def __init__(self):
|
|
self._mapping = {}
|
|
self.changed = False
|
|
super().__init__(fallback=config)
|
|
|
|
def __iter__(self):
|
|
"""Iterate over tuples of unique keycodes and their character."""
|
|
return iter(self._mapping.items())
|
|
|
|
def __len__(self):
|
|
return len(self._mapping)
|
|
|
|
def set(self, *args):
|
|
"""Set a config value. See `ConfigBase.set`."""
|
|
self.changed = True
|
|
return super().set(*args)
|
|
|
|
def remove(self, *args):
|
|
"""Remove a config value. See `ConfigBase.remove`."""
|
|
self.changed = True
|
|
return super().remove(*args)
|
|
|
|
def change(self, new_key, character, previous_key=None):
|
|
"""Replace the mapping of a keycode with a different one.
|
|
|
|
Parameters
|
|
----------
|
|
new_key : int, int, int
|
|
the new key. (type, code, value). key as in hashmap-key
|
|
|
|
0: type, one of evdev.events, taken from the original source
|
|
event. Everything will be mapped to EV_KEY.
|
|
1: The source keycode, what the mouse would report without any
|
|
modification.
|
|
2. The value. 1 (down), 2 (up) or any
|
|
other value that the device reports. Gamepads use a continuous
|
|
space of values for joysticks and triggers.
|
|
character : string
|
|
A single character known to xkb or linux.
|
|
Examples: KP_1, Shift_L, a, B, BTN_LEFT.
|
|
previous_key : int, int, int
|
|
the previous key, same format as new_key
|
|
|
|
If not set, will not remove any previous mapping. If you recently
|
|
used (1, 10, 1) for new_key and want to overwrite that with
|
|
(1, 11, 1), provide (1, 5, 1) here.
|
|
"""
|
|
if character is None:
|
|
raise ValueError('Expected `character` not to be None')
|
|
|
|
verify_key(new_key)
|
|
if previous_key:
|
|
verify_key(previous_key)
|
|
|
|
logger.debug(
|
|
'%s will map to %s, replacing %s',
|
|
new_key, character, previous_key
|
|
)
|
|
self.clear(new_key) # this also clears all equivalent keys
|
|
self._mapping[new_key] = character
|
|
|
|
if previous_key is not None:
|
|
code_changed = new_key != previous_key
|
|
if code_changed:
|
|
# clear previous mapping of that code, because the line
|
|
# representing that one will now represent a different one
|
|
self.clear(previous_key)
|
|
|
|
self.changed = True
|
|
|
|
def clear(self, key):
|
|
"""Remove a keycode from the mapping.
|
|
|
|
Parameters
|
|
----------
|
|
key : int, int, int
|
|
keycode : int
|
|
ev_type : int
|
|
one of evdev.events. codes may be the same for various
|
|
event types.
|
|
value : int
|
|
event value. Usually you want 1 (down)
|
|
"""
|
|
verify_key(key)
|
|
|
|
if isinstance(key[0], tuple):
|
|
for permutation in itertools.permutations(key[:-1]):
|
|
permutation += (key[-1],)
|
|
if permutation in self._mapping:
|
|
logger.debug('%s will be cleared', permutation)
|
|
del self._mapping[permutation]
|
|
return
|
|
|
|
if self._mapping.get(key) is not None:
|
|
logger.debug('%s will be cleared', key)
|
|
del self._mapping[key]
|
|
self.changed = True
|
|
return
|
|
|
|
logger.error('Unknown key %s', key)
|
|
|
|
def empty(self):
|
|
"""Remove all mappings."""
|
|
self._mapping = {}
|
|
self.changed = True
|
|
|
|
def load(self, path):
|
|
"""Load a dumped JSON from home to overwrite the mappings.
|
|
|
|
Parameters
|
|
path : string
|
|
Path of the preset file
|
|
"""
|
|
logger.info('Loading preset from "%s"', path)
|
|
|
|
if not os.path.exists(path):
|
|
raise FileNotFoundError(
|
|
f'Tried to load non-existing preset "{path}"'
|
|
)
|
|
|
|
self.clear_config()
|
|
|
|
with open(path, 'r') as file:
|
|
preset_dict = json.load(file)
|
|
|
|
if not isinstance(preset_dict.get('mapping'), dict):
|
|
logger.error('Invalid preset config at "%s"', path)
|
|
return
|
|
|
|
for key, character in preset_dict['mapping'].items():
|
|
if '+' in key:
|
|
chunks = key.split('+')
|
|
key = tuple([split_key(chunk) for chunk in chunks])
|
|
if None in key:
|
|
continue
|
|
else:
|
|
key = split_key(key)
|
|
if key is None:
|
|
continue
|
|
|
|
logger.spam('%s maps to %s', key, character)
|
|
self._mapping[key] = character
|
|
|
|
# add any metadata of the mapping
|
|
for key in preset_dict:
|
|
if key == 'mapping':
|
|
continue
|
|
self._config[key] = preset_dict[key]
|
|
|
|
self.changed = False
|
|
|
|
def clone(self):
|
|
"""Create a copy of the mapping."""
|
|
mapping = Mapping()
|
|
mapping._mapping = copy.deepcopy(self._mapping)
|
|
mapping.changed = self.changed
|
|
return mapping
|
|
|
|
def save(self, path):
|
|
"""Dump as JSON into home."""
|
|
logger.info('Saving preset to %s', path)
|
|
|
|
touch(path)
|
|
|
|
with open(path, 'w') as file:
|
|
if self._config.get('mapping') is not None:
|
|
logger.error(
|
|
'"mapping" is reserved and cannot be used as config key'
|
|
)
|
|
preset_dict = self._config
|
|
|
|
# make sure to keep the option to add metadata if ever needed,
|
|
# so put the mapping into a special key
|
|
json_ready_mapping = {}
|
|
# tuple keys are not possible in json, encode them as string
|
|
for key, value in self._mapping.items():
|
|
if isinstance(key[0], tuple):
|
|
# combinations to "1,2,1+1,3,1"
|
|
new_key = '+'.join([
|
|
','.join([
|
|
str(value)
|
|
for value in sub_key
|
|
])
|
|
for sub_key in key
|
|
])
|
|
else:
|
|
new_key = ','.join([str(value) for value in key])
|
|
json_ready_mapping[new_key] = value
|
|
|
|
preset_dict['mapping'] = json_ready_mapping
|
|
json.dump(preset_dict, file, indent=4)
|
|
file.write('\n')
|
|
|
|
self.changed = False
|
|
|
|
def get_character(self, key):
|
|
"""Read the character that is mapped to this keycode.
|
|
|
|
Parameters
|
|
----------
|
|
key : int, int, int
|
|
keycode : int
|
|
ev_type : int
|
|
one of evdev.events. codes may be the same for various
|
|
event types.
|
|
value : int
|
|
event value. Usually you want 1 (down)
|
|
|
|
Or a tuple of multiple of those. Checks any possible permutation
|
|
with the last key being always at the end, to work well with
|
|
combinations.
|
|
"""
|
|
if isinstance(key[0], tuple):
|
|
for permutation in itertools.permutations(key[:-1]):
|
|
permutation += (key[-1],)
|
|
existing = self._mapping.get(permutation)
|
|
if existing is not None:
|
|
return existing
|
|
|
|
return self._mapping.get(key)
|