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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 List
from typing import Set
from typing import Optional
from typing import Union
from ....keyboard.mappings import OtgKey
from ....keyboard.mappings import KEYMAP
# =====
class BaseEvent:
pass
class ClearEvent(BaseEvent):
pass
class ResetEvent(BaseEvent):
pass
# =====
@dataclasses.dataclass(frozen=True)
class KeyEvent(BaseEvent):
key: OtgKey
state: bool
def __post_init__(self) -> None:
assert (not self.key.is_modifier)
@dataclasses.dataclass(frozen=True)
class ModifierEvent(BaseEvent):
modifier: OtgKey
state: bool
def __post_init__(self) -> None:
assert self.modifier.is_modifier
def make_keyboard_event(key: str, state: bool) -> Union[KeyEvent, ModifierEvent]:
otg_key = KEYMAP[key].otg
if otg_key.is_modifier:
return ModifierEvent(otg_key, state)
return KeyEvent(otg_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[OtgKey],
pressed_keys: List[Optional[OtgKey]],
) -> 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
to_fixed_x: int = 0
to_fixed_y: int = 0
def __post_init__(self) -> None:
assert -32768 <= self.to_x <= 32767
assert -32768 <= self.to_y <= 32767
object.__setattr__(self, "to_fixed_x", (self.to_x + 32768) // 2)
object.__setattr__(self, "to_fixed_y", (self.to_y + 32768) // 2)
@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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