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125 lines
4.5 KiB
Python
125 lines
4.5 KiB
Python
# -*- coding: utf-8 -*-
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# input-remapper - GUI for device specific keyboard mappings
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# Copyright (C) 2023 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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"""Stores injection-process wide information."""
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from __future__ import annotations
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from collections import defaultdict
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from typing import List, Dict, Set, Hashable
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import evdev
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from inputremapper.configs.input_config import DeviceHash
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from inputremapper.input_event import InputEvent
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from inputremapper.configs.preset import Preset
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from inputremapper.injection.mapping_handlers.mapping_handler import (
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EventListener,
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NotifyCallback,
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)
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from inputremapper.injection.mapping_handlers.mapping_parser import (
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parse_mappings,
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EventPipelines,
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)
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from inputremapper.logger import logger
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class Context:
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"""Stores injection-process wide information.
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In some ways this is a wrapper for the preset that derives some
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information that is specifically important to the injection.
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The information in the context does not change during the injection.
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One Context exists for each injection process, which is shared
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with all coroutines and used objects.
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Benefits of the context:
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- less redundant passing around of parameters
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- easier to add new process wide information without having to adjust
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all function calls in unittests
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- makes the injection class shorter and more specific to a certain task,
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which is actually spinning up the injection.
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Note, that for the reader_service a ContextDummy is used.
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Members
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-------
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preset : Preset
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The preset holds all Mappings for the injection process
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listeners : Set[EventListener]
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A set of callbacks which receive all events
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callbacks : Dict[Tuple[int, int], List[NotifyCallback]]
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All entry points to the event pipeline sorted by InputEvent.type_and_code
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"""
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listeners: Set[EventListener]
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_notify_callbacks: Dict[Hashable, List[NotifyCallback]]
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_handlers: EventPipelines
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_forward_devices: Dict[DeviceHash, evdev.UInput]
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_source_devices: Dict[DeviceHash, evdev.InputDevice]
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def __init__(
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self,
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preset: Preset,
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source_devices: Dict[DeviceHash, evdev.InputDevice],
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forward_devices: Dict[DeviceHash, evdev.UInput],
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):
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if len(forward_devices) == 0:
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logger.warning("Not forward_devices set")
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if len(source_devices) == 0:
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logger.warning("Not source_devices set")
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self.listeners = set()
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self._source_devices = source_devices
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self._forward_devices = forward_devices
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self._notify_callbacks = defaultdict(list)
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self._handlers = parse_mappings(preset, self)
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self._create_callbacks()
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def reset(self) -> None:
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"""Call the reset method for each handler in the context."""
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for handlers in self._handlers.values():
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for handler in handlers:
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handler.reset()
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def _create_callbacks(self) -> None:
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"""Add the notify method from all _handlers to self.callbacks."""
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for input_config, handler_list in self._handlers.items():
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input_match_hash = input_config.input_match_hash
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logger.info("Adding NotifyCallback for %s", input_match_hash)
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self._notify_callbacks[input_match_hash].extend(
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handler.notify for handler in handler_list
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)
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def get_notify_callbacks(self, input_event: InputEvent) -> List[NotifyCallback]:
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input_match_hash = input_event.input_match_hash
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return self._notify_callbacks[input_match_hash]
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def get_forward_uinput(self, origin_hash: DeviceHash) -> evdev.UInput:
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"""Get the "forward" uinput events from the given origin should go into."""
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return self._forward_devices[origin_hash]
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def get_source(self, key: DeviceHash) -> evdev.InputDevice:
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return self._source_devices[key]
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