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# ========================================================================== #
# #
# KVMD - The main Pi-KVM daemon. #
# #
# Copyright (C) 2018 Maxim Devaev <[email protected]> #
# #
# This program 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. #
# #
# This program 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 this program. If not, see <https://www.gnu.org/licenses/>. #
# #
# ========================================================================== #
import struct
import dataclasses
from typing import Any
from ....logging import get_logger
from .device import BaseEvent
from .device import BaseDeviceProcess
# =====
class _ClearEvent(BaseEvent):
pass
class _ResetEvent(BaseEvent):
pass
@dataclasses.dataclass(frozen=True)
class _ButtonEvent(BaseEvent):
code: int
state: bool
@dataclasses.dataclass(frozen=True)
class _MoveEvent(BaseEvent):
to_x: int
to_y: int
@dataclasses.dataclass(frozen=True)
class _WheelEvent(BaseEvent):
delta_x: int
delta_y: int
# =====
class MouseProcess(BaseDeviceProcess):
def __init__(self, **kwargs: Any) -> None:
super().__init__(
name="mouse",
read_size=0,
initial_state={},
**kwargs,
)
self.__pressed_buttons: int = 0
self.__x = 0
self.__y = 0
def cleanup(self) -> None:
self._stop()
get_logger().info("Clearing HID-mouse events ...")
report = self.__make_report(0, self.__x, self.__y, 0, 0)
self._ensure_write(report, close=True) # Release all buttons
def send_clear_event(self) -> None:
self._queue_event(_ClearEvent())
def send_reset_event(self) -> None:
self._queue_event(_ResetEvent())
def send_button_event(self, button: str, state: bool) -> None:
code: int = {
"left": 0x1,
"right": 0x2,
"middle": 0x4,
}[button]
self._queue_event(_ButtonEvent(code, state))
def send_move_event(self, to_x: int, to_y: int) -> None:
assert -32768 <= to_x <= 32767
assert -32768 <= to_y <= 32767
to_x = (to_x + 32768) // 2
to_y = (to_y + 32768) // 2
self._queue_event(_MoveEvent(to_x, to_y))
def send_wheel_event(self, delta_x: int, delta_y: int) -> None:
assert -127 <= delta_x <= 127
assert -127 <= delta_y <= 127
self._queue_event(_WheelEvent(delta_x, delta_y))
# =====
def _process_event(self, event: BaseEvent) -> None:
if isinstance(event, _ClearEvent):
self.__process_clear_event()
elif isinstance(event, _ResetEvent):
self.__process_clear_event(reopen=True)
elif isinstance(event, _ButtonEvent):
self.__process_button_event(event)
elif isinstance(event, _MoveEvent):
self.__process_move_event(event)
elif isinstance(event, _WheelEvent):
self.__process_wheel_event(event)
def __process_clear_event(self, reopen: bool=False) -> None:
self.__clear_state()
self.__send_current_state(0, 0, reopen=reopen)
def __process_button_event(self, event: _ButtonEvent) -> None:
if event.code & self.__pressed_buttons:
# Ранее нажатую кнопку отжимаем
self.__pressed_buttons &= ~event.code
if not self.__send_current_state(0, 0):
return
if event.state:
# Нажимаем если нужно
self.__pressed_buttons |= event.code
self.__send_current_state(0, 0)
def __process_move_event(self, event: _MoveEvent) -> None:
self.__x = event.to_x
self.__y = event.to_y
self.__send_current_state(0, 0)
def __process_wheel_event(self, event: _WheelEvent) -> None:
self.__send_current_state(event.delta_x, event.delta_y)
# =====
def __send_current_state(self, delta_x: int, delta_y: int, reopen: bool=False) -> bool:
report = self.__make_report(
buttons=self.__pressed_buttons,
to_x=self.__x,
to_y=self.__y,
delta_x=delta_x,
delta_y=delta_y,
)
if not self._ensure_write(report, reopen=reopen):
self.__clear_state()
return False
return True
def __clear_state(self) -> None:
self.__pressed_buttons = 0
self.__x = 0
self.__y = 0
def __make_report(self, buttons: int, to_x: int, to_y: int, delta_x: int, delta_y: int) -> bytes:
# XXX: Delta Y before X: it's ok.
# See /kvmd/apps/otg/hid/keyboard.py for details
return struct.pack("<BHHbb", buttons, to_x, to_y, delta_y, delta_x)
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