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# -*- coding: utf-8 -*-
# input-remapper - GUI for device specific keyboard mappings
# Copyright (C) 2025 sezanzeb <b8x45ygc9@mozmail.com>
#
# This file is part of input-remapper.
#
# input-remapper 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.
#
# input-remapper 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 input-remapper. If not, see <https://www.gnu.org/licenses/>.
from typing import Tuple, Dict
from inputremapper import exceptions
from inputremapper.configs.input_config import InputCombination
from inputremapper.configs.mapping import Mapping
from inputremapper.exceptions import MappingParsingError
from inputremapper.injection.global_uinputs import GlobalUInputs
from inputremapper.injection.mapping_handlers.mapping_handler import (
MappingHandler,
HandlerEnums,
)
from inputremapper.input_event import InputEvent
from inputremapper.logging.logger import logger
from inputremapper.utils import get_evdev_constant_name
class KeyHandler(MappingHandler):
"""Injects the target key if notified."""
_active: bool
_maps_to: Tuple[int, int]
def __init__(
self,
combination: InputCombination,
mapping: Mapping,
global_uinputs: GlobalUInputs,
**_,
):
super().__init__(combination, mapping, global_uinputs)
maps_to = mapping.get_output_type_code()
if not maps_to:
raise MappingParsingError(
"Unable to create key handler from mapping", mapping=mapping
)
self._maps_to = maps_to
self._active = False
def __str__(self):
return f"KeyHandler to {self._maps_to}"
def __repr__(self):
return f"<{str(self)} at {hex(id(self))}>"
@property
def child(self): # used for logging
name = get_evdev_constant_name(*self._maps_to)
return f"maps to: {name} {self._maps_to} on {self.mapping.target_uinput}"
def notify(self, event: InputEvent, *_, **__) -> bool:
"""Inject event.value to the target key."""
event_tuple = (*self._maps_to, event.value)
try:
self.global_uinputs.write(event_tuple, self.mapping.target_uinput)
self._active = bool(event.value)
return True
except exceptions.Error:
return False
def reset(self) -> None:
logger.debug("resetting key_handler")
if self._active:
event_tuple = (*self._maps_to, 0)
self.global_uinputs.write(event_tuple, self.mapping.target_uinput)
self._active = False
def needs_wrapping(self) -> bool:
return True
def wrap_with(self) -> Dict[InputCombination, HandlerEnums]:
return {InputCombination(self.input_configs): HandlerEnums.combination}
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