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87 lines
3.2 KiB
Python
87 lines
3.2 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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"""Stores injection-process wide information."""
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from collections import defaultdict
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from typing import List, Dict, Tuple, Set
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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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InputEventHandler,
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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 parse_mappings
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from inputremapper.input_event import InputEvent
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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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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[Tuple[int, int], List[NotifyCallback]]
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_handlers: Dict[InputEvent, Set[InputEventHandler]]
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def __init__(self, preset: Preset):
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self.listeners = set()
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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 event, handler_list in self._handlers.items():
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self.notify_callbacks[event.type_and_code].extend(
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handler.notify for handler in handler_list
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)
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