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122 lines
4.3 KiB
Python
122 lines
4.3 KiB
Python
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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# input-remapper - GUI for device specific keyboard mappings
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# Copyright (C) 2022 sezanzeb <proxima@sezanzeb.de>
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#
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# This file is part of input-remapper.
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#
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# input-remapper is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# input-remapper is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with input-remapper. If not, see <https://www.gnu.org/licenses/>.
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"""Because multiple calls to async_read_loop won't work."""
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import asyncio
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import evdev
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from inputremapper.injection.consumers.joystick_to_mouse import JoystickToMouse
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from inputremapper.injection.consumers.keycode_mapper import KeycodeMapper
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from inputremapper.logger import logger
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from inputremapper.injection.context import Context
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consumer_classes = [
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KeycodeMapper,
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JoystickToMouse,
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]
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class ConsumerControl:
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"""Reads input events from a single device and distributes them.
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There is one ConsumerControl object for each source, which tells multiple consumers
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that a new event is ready so that they can inject all sorts of funny
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things.
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Other devnodes may be present for the hardware device, in which case this
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needs to be created multiple times.
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"""
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def __init__(
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self,
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context: Context,
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source: evdev.InputDevice,
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forward_to: evdev.UInput,
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) -> None:
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"""Initialize all consumers
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Parameters
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----------
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source : evdev.InputDevice
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where to read keycodes from
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forward_to : evdev.UInput
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where to write keycodes to that were not mapped to anything.
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Should be an UInput with capabilities that work for all forwarded
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events, so ideally they should be copied from source.
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"""
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self._source = source
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self._forward_to = forward_to
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# add all consumers that are enabled for this particular configuration
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self._consumers = []
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for Consumer in consumer_classes:
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consumer = Consumer(context, source, forward_to)
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if consumer.is_enabled():
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self._consumers.append(consumer)
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async def run(self):
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"""Start doing things.
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Can be stopped by stopping the asyncio loop. This loop
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reads events from a single device only.
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"""
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for consumer in self._consumers:
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# run all of them in parallel
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asyncio.ensure_future(consumer.run())
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logger.debug(
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"Starting to listen for events from %s, fd %s",
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self._source.path,
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self._source.fd,
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)
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async for event in self._source.async_read_loop():
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if event.type == evdev.ecodes.EV_KEY and event.value == 2:
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# button-hold event. Environments (gnome, etc.) create them on
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# their own for the injection-fake-device if the release event
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# won't appear, no need to forward or map them.
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continue
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handled = False
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for consumer in self._consumers:
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# copy so that the consumer doesn't screw this up for
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# all other future consumers
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event_copy = evdev.InputEvent(
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sec=event.sec,
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usec=event.usec,
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type=event.type,
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code=event.code,
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value=event.value,
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)
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if consumer.is_handled(event_copy):
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await consumer.notify(event_copy)
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handled = True
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if not handled:
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# forward the rest
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self._forward_to.write(event.type, event.code, event.value)
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# this already includes SYN events, so need to syn here again
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# This happens all the time in tests because the async_read_loop stops when
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# there is nothing to read anymore. Otherwise tests would block.
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logger.error('The async_read_loop for "%s" stopped early', self._source.path)
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