mirror of
https://github.com/sezanzeb/input-remapper
synced 2024-11-18 03:25:52 +00:00
240 lines
7.7 KiB
Python
240 lines
7.7 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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from __future__ import annotations
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import enum
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from dataclasses import dataclass
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from typing import Tuple, Optional, Hashable, Literal
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import evdev
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from evdev import ecodes
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from inputremapper.utils import get_evdev_constant_name
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class EventActions(enum.Enum):
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"""Additional information an InputEvent can send through the event pipeline."""
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as_key = enum.auto() # treat this event as a key event
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recenter = enum.auto() # recenter the axis when receiving this
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none = enum.auto()
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# used in combination with as_key, for originally abs or rel events
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positive_trigger = enum.auto() # original event was positive direction
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negative_trigger = enum.auto() # original event was negative direction
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def validate_event(event):
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"""Test if the event is valid."""
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if not isinstance(event.type, int):
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raise TypeError(f"Expected type to be an int, but got {event.type}")
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if not isinstance(event.code, int):
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raise TypeError(f"Expected code to be an int, but got {event.code}")
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if not isinstance(event.value, int):
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# this happened to me because I screwed stuff up
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raise TypeError(f"Expected value to be an int, but got {event.value}")
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return event
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# Todo: add slots=True as soon as python 3.10 is in common distros
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@dataclass(frozen=True)
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class InputEvent:
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"""Events that are generated during runtime.
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Is a drop-in replacement for evdev.InputEvent
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"""
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sec: int
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usec: int
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type: int
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code: int
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value: int
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actions: Tuple[EventActions, ...] = ()
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origin_hash: Optional[str] = None
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forward_to: Optional[evdev.UInput] = None
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def __eq__(self, other: InputEvent | evdev.InputEvent | Tuple[int, int, int]):
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# useful in tests
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if isinstance(other, InputEvent) or isinstance(other, evdev.InputEvent):
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return self.event_tuple == (other.type, other.code, other.value)
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if isinstance(other, tuple):
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return self.event_tuple == other
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raise TypeError(f"cannot compare {type(other)} with InputEvent")
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@property
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def input_match_hash(self) -> Hashable:
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"""a Hashable object which is intended to match the InputEvent with a
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InputConfig.
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"""
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return self.type, self.code, self.origin_hash
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@classmethod
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def from_event(
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cls, event: evdev.InputEvent, origin_hash: Optional[str] = None
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) -> InputEvent:
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"""Create a InputEvent from another InputEvent or evdev.InputEvent."""
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try:
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return cls(
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event.sec,
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event.usec,
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event.type,
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event.code,
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event.value,
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origin_hash=origin_hash,
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)
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except AttributeError as exception:
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raise TypeError(
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f"Failed to create InputEvent from {event = }"
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) from exception
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@classmethod
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def from_tuple(
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cls, event_tuple: Tuple[int, int, int], origin_hash: Optional[str] = None
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) -> InputEvent:
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"""Create a InputEvent from a (type, code, value) tuple."""
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# use this as rarely as possible. Construct objects early on and pass them
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# around instead of passing around integers
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if len(event_tuple) != 3:
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raise TypeError(
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f"failed to create InputEvent {event_tuple = } must have length 3"
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)
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return validate_event(
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cls(
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0,
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0,
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int(event_tuple[0]),
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int(event_tuple[1]),
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int(event_tuple[2]),
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origin_hash=origin_hash,
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)
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)
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@classmethod
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def abs(cls, code: int, value: int, origin_hash: Optional[str] = None):
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"""Create an abs event, like joystick movements."""
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return validate_event(
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cls(
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0,
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0,
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ecodes.EV_ABS,
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code,
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value,
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origin_hash=origin_hash,
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)
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)
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@classmethod
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def rel(cls, code: int, value: int, origin_hash: Optional[str] = None):
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"""Create a rel event, like mouse movements."""
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return validate_event(
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cls(
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0,
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0,
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ecodes.EV_REL,
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code,
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value,
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origin_hash=origin_hash,
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)
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)
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@classmethod
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def key(cls, code: int, value: Literal[0, 1], origin_hash: Optional[str] = None):
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"""Create a key event, like keyboard keys or gamepad buttons.
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A value of 1 means "press", a value of 0 means "release".
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"""
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return validate_event(
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cls(
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0,
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0,
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ecodes.EV_KEY,
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code,
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value,
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origin_hash=origin_hash,
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)
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)
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@property
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def type_and_code(self) -> Tuple[int, int]:
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"""Event type, code."""
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return self.type, self.code
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@property
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def event_tuple(self) -> Tuple[int, int, int]:
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"""Event type, code, value."""
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return self.type, self.code, self.value
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@property
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def is_key_event(self) -> bool:
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"""Whether this is interpreted as a key event."""
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return self.type == evdev.ecodes.EV_KEY or EventActions.as_key in self.actions
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@property
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def is_wheel_event(self) -> bool:
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"""Whether this is interpreted as a key event."""
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return self.type == evdev.ecodes.EV_REL and self.code in [
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ecodes.REL_WHEEL,
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ecodes.REL_HWHEEL,
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]
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@property
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def is_wheel_hi_res_event(self) -> bool:
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"""Whether this is interpreted as a key event."""
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return self.type == evdev.ecodes.EV_REL and self.code in [
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ecodes.REL_WHEEL_HI_RES,
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ecodes.REL_HWHEEL_HI_RES,
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]
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def __str__(self):
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name = get_evdev_constant_name(self.type, self.code)
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return f"InputEvent for {self.event_tuple} {name}"
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def __repr__(self):
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return f"<{str(self)} at {hex(id(self))}>"
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def timestamp(self):
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"""Return the unix timestamp of when the event was seen."""
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return self.sec + self.usec / 1000000
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def modify(
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self,
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sec: Optional[int] = None,
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usec: Optional[int] = None,
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type_: Optional[int] = None,
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code: Optional[int] = None,
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value: Optional[int] = None,
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actions: Optional[Tuple[EventActions, ...]] = None,
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origin_hash: Optional[str] = None,
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) -> InputEvent:
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"""Return a new modified event."""
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return InputEvent(
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sec if sec is not None else self.sec,
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usec if usec is not None else self.usec,
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type_ if type_ is not None else self.type,
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code if code is not None else self.code,
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value if value is not None else self.value,
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actions if actions is not None else self.actions,
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origin_hash=origin_hash if origin_hash is not None else self.origin_hash,
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)
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