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# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2022 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 List
from typing import Set
from typing import Optional
from typing import Union
from ....keyboard.mappings import UsbKey
from ....keyboard.mappings import KEYMAP
from ....mouse import MouseRange
# =====
class BaseEvent:
pass
class ClearEvent(BaseEvent):
pass
class ResetEvent(BaseEvent):
pass
# =====
@dataclasses.dataclass(frozen=True)
class KeyEvent(BaseEvent):
key: UsbKey
state: bool
def __post_init__(self) -> None:
assert (not self.key.is_modifier)
@dataclasses.dataclass(frozen=True)
class ModifierEvent(BaseEvent):
modifier: UsbKey
state: bool
def __post_init__(self) -> None:
assert self.modifier.is_modifier
def make_keyboard_event(key: str, state: bool) -> Union[KeyEvent, ModifierEvent]:
usb_key = KEYMAP[key].usb
if usb_key.is_modifier:
return ModifierEvent(usb_key, state)
return KeyEvent(usb_key, state)
def get_led_caps(flags: int) -> bool:
# https://wiki.osdev.org/USB_Human_Interface_Devices#LED_lamps
return bool(flags & 2)
def get_led_scroll(flags: int) -> bool:
return bool(flags & 4)
def get_led_num(flags: int) -> bool:
return bool(flags & 1)
def make_keyboard_report(
pressed_modifiers: Set[UsbKey],
pressed_keys: List[Optional[UsbKey]],
) -> bytes:
modifiers = 0
for modifier in pressed_modifiers:
modifiers |= modifier.code
assert len(pressed_keys) == 6
keys = [
(0 if key is None else key.code)
for key in pressed_keys
]
return bytes([modifiers, 0] + keys)
# =====
@dataclasses.dataclass(frozen=True)
class MouseButtonEvent(BaseEvent):
button: str
state: bool
code: int = 0
def __post_init__(self) -> None:
object.__setattr__(self, "code", {
"left": 0x1,
"right": 0x2,
"middle": 0x4,
"up": 0x8, # Back
"down": 0x10, # Forward
}[self.button])
@dataclasses.dataclass(frozen=True)
class MouseMoveEvent(BaseEvent):
to_x: int
to_y: int
win98_fix: bool = False
to_fixed_x: int = 0
to_fixed_y: int = 0
def __post_init__(self) -> None:
assert MouseRange.MIN <= self.to_x <= MouseRange.MAX
assert MouseRange.MIN <= self.to_y <= MouseRange.MAX
to_fixed_x = MouseRange.remap(self.to_x, 0, MouseRange.MAX)
to_fixed_y = MouseRange.remap(self.to_y, 0, MouseRange.MAX)
if self.win98_fix:
# https://github.com/pikvm/pikvm/issues/159
# For some reason, the correct implementation of this fix
# is a shift to the left, and not to the right, as in VirtualBox
to_fixed_x <<= 1
to_fixed_y <<= 1
object.__setattr__(self, "to_fixed_x", to_fixed_x)
object.__setattr__(self, "to_fixed_y", to_fixed_y)
@dataclasses.dataclass(frozen=True)
class MouseRelativeEvent(BaseEvent):
delta_x: int
delta_y: int
def __post_init__(self) -> None:
assert -127 <= self.delta_x <= 127
assert -127 <= self.delta_y <= 127
@dataclasses.dataclass(frozen=True)
class MouseWheelEvent(BaseEvent):
delta_x: int
delta_y: int
def __post_init__(self) -> None:
assert -127 <= self.delta_x <= 127
assert -127 <= self.delta_y <= 127
def make_mouse_report(
absolute: bool,
buttons: int,
move_x: int,
move_y: int,
wheel_x: Optional[int],
wheel_y: int,
) -> bytes:
# XXX: Wheel Y before X: it's ok.
# See /kvmd/apps/otg/hid/mouse.py for details
if wheel_x is not None:
return struct.pack(("<BHHbb" if absolute else "<Bbbbb"), buttons, move_x, move_y, wheel_y, wheel_x)
else:
return struct.pack(("<BHHb" if absolute else "<Bbbb"), buttons, move_x, move_y, wheel_y)
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