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path: root/kvmd/plugins/hid/__init__.py
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# ========================================================================== #
#                                                                            #
#    KVMD - The main PiKVM daemon.                                           #
#                                                                            #
#    Copyright (C) 2018-2024  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 asyncio
import functools
import time

from typing import Iterable
from typing import Callable
from typing import AsyncGenerator
from typing import Any

from ...yamlconf import Option

from ...validators.basic import valid_bool
from ...validators.basic import valid_int_f1
from ...validators.basic import valid_string_list
from ...validators.hid import valid_hid_key
from ...validators.hid import valid_hid_mouse_move

from ...keyboard.mappings import WebModifiers
from ...mouse import MouseRange

from .. import BasePlugin
from .. import get_plugin_class


# =====
class BaseHid(BasePlugin):  # pylint: disable=too-many-instance-attributes
    def __init__(
        self,
        ignore_keys: list[str],

        mouse_x_min: int,
        mouse_x_max: int,
        mouse_y_min: int,
        mouse_y_max: int,

        jiggler_enabled: bool,
        jiggler_active: bool,
        jiggler_interval: int,
    ) -> None:

        self.__ignore_keys = ignore_keys

        self.__mouse_x_range = (mouse_x_min, mouse_x_max)
        self.__mouse_y_range = (mouse_y_min, mouse_y_max)

        self.__jiggler_enabled = jiggler_enabled
        self.__jiggler_active = jiggler_active
        self.__jiggler_interval = jiggler_interval
        self.__jiggler_absolute = True
        self.__activity_ts = 0

    @classmethod
    def _get_base_options(cls) -> dict[str, Any]:
        return {
            "ignore_keys": Option([], type=functools.partial(valid_string_list, subval=valid_hid_key)),
            "mouse_x_range": {
                "min": Option(MouseRange.MIN, type=valid_hid_mouse_move, unpack_as="mouse_x_min"),
                "max": Option(MouseRange.MAX, type=valid_hid_mouse_move, unpack_as="mouse_x_max"),
            },
            "mouse_y_range": {
                "min": Option(MouseRange.MIN, type=valid_hid_mouse_move, unpack_as="mouse_y_min"),
                "max": Option(MouseRange.MAX, type=valid_hid_mouse_move, unpack_as="mouse_y_max"),
            },
            "jiggler": {
                "enabled":  Option(False, type=valid_bool, unpack_as="jiggler_enabled"),
                "active":   Option(False, type=valid_bool, unpack_as="jiggler_active"),
                "interval": Option(60,    type=valid_int_f1, unpack_as="jiggler_interval"),
            },
        }

    # =====

    def sysprep(self) -> None:
        raise NotImplementedError

    async def get_state(self) -> dict:
        raise NotImplementedError

    async def trigger_state(self) -> None:
        raise NotImplementedError

    async def poll_state(self) -> AsyncGenerator[dict, None]:
        # ==== Granularity table ====
        #   - enabled   -- Full
        #   - online    -- Partial
        #   - busy      -- Partial
        #   - connected -- Partial, nullable
        #   - keyboard.online  -- Partial
        #   - keyboard.outputs -- Partial
        #   - keyboard.leds    -- Partial
        #   - mouse.online     -- Partial
        #   - mouse.outputs    -- Partial, follows with absolute
        #   - mouse.absolute   -- Partial, follows with outputs
        # ===========================

        yield {}
        raise NotImplementedError

    async def reset(self) -> None:
        raise NotImplementedError

    async def cleanup(self) -> None:
        pass

    def set_params(
        self,
        keyboard_output: (str | None)=None,
        mouse_output: (str | None)=None,
        jiggler: (bool | None)=None,
    ) -> None:

        raise NotImplementedError

    def set_connected(self, connected: bool) -> None:
        _ = connected

    # =====

    async def send_key_events(
        self,
        keys: Iterable[tuple[str, bool]],
        no_ignore_keys: bool=False,
        slow: bool=False,
    ) -> None:

        for (key, state) in keys:
            if no_ignore_keys or key not in self.__ignore_keys:
                if slow:
                    await asyncio.sleep(0.02)
                self.send_key_event(key, state, False)

    def send_key_event(self, key: str, state: bool, finish: bool) -> None:
        self._send_key_event(key, state)
        if state and finish and (key not in WebModifiers.ALL and key != "PrintScreen"):
            # Считаем что PrintScreen это модификатор для Alt+SysRq+...
            # По-хорошему надо учитывать факт нажатия на Alt, но можно и забить.
            self._send_key_event(key, False)
        self.__bump_activity()

    def _send_key_event(self, key: str, state: bool) -> None:
        raise NotImplementedError

    # =====

    def send_mouse_button_event(self, button: str, state: bool) -> None:
        self._send_mouse_button_event(button, state)
        self.__bump_activity()

    def _send_mouse_button_event(self, button: str, state: bool) -> None:
        raise NotImplementedError

    # =====

    def send_mouse_move_event(self, to_x: int, to_y: int) -> None:
        if self.__mouse_x_range != MouseRange.RANGE:
            to_x = MouseRange.remap(to_x, *self.__mouse_x_range)
        if self.__mouse_y_range != MouseRange.RANGE:
            to_y = MouseRange.remap(to_y, *self.__mouse_y_range)
        self._send_mouse_move_event(to_x, to_y)
        self.__bump_activity()

    def _send_mouse_move_event(self, to_x: int, to_y: int) -> None:
        _ = to_x  # XXX: NotImplementedError
        _ = to_y

    # =====

    def send_mouse_relative_events(self, deltas: Iterable[tuple[int, int]], squash: bool) -> None:
        self.__process_mouse_delta_event(deltas, squash, self.send_mouse_relative_event)

    def send_mouse_relative_event(self, delta_x: int, delta_y: int) -> None:
        self._send_mouse_relative_event(delta_x, delta_y)
        self.__bump_activity()

    def _send_mouse_relative_event(self, delta_x: int, delta_y: int) -> None:
        _ = delta_x  # XXX: NotImplementedError
        _ = delta_y

    # =====

    def send_mouse_wheel_events(self, deltas: Iterable[tuple[int, int]], squash: bool) -> None:
        self.__process_mouse_delta_event(deltas, squash, self.send_mouse_wheel_event)

    def send_mouse_wheel_event(self, delta_x: int, delta_y: int) -> None:
        self._send_mouse_wheel_event(delta_x, delta_y)
        self.__bump_activity()

    def _send_mouse_wheel_event(self, delta_x: int, delta_y: int) -> None:
        raise NotImplementedError

    # =====

    def clear_events(self) -> None:
        self._clear_events()  # Don't bump activity here

    def _clear_events(self) -> None:
        raise NotImplementedError

    # =====

    def __process_mouse_delta_event(
        self,
        deltas: Iterable[tuple[int, int]],
        squash: bool,
        handler: Callable[[int, int], None],
    ) -> None:

        if squash:
            prev = (0, 0)
            for cur in deltas:
                if abs(prev[0] + cur[0]) > 127 or abs(prev[1] + cur[1]) > 127:
                    handler(*prev)
                    prev = cur
                else:
                    prev = (prev[0] + cur[0], prev[1] + cur[1])
            if prev[0] or prev[1]:
                handler(*prev)
        else:
            for xy in deltas:
                handler(*xy)

    def __bump_activity(self) -> None:
        self.__activity_ts = int(time.monotonic())

    def _set_jiggler_absolute(self, absolute: bool) -> None:
        self.__jiggler_absolute = absolute

    def _set_jiggler_active(self, active: bool) -> None:
        if self.__jiggler_enabled:
            self.__jiggler_active = active

    def _get_jiggler_state(self) -> dict:
        return {
            "jiggler": {
                "enabled":  self.__jiggler_enabled,
                "active":   self.__jiggler_active,
                "interval": self.__jiggler_interval,
            },
        }

    # =====

    async def systask(self) -> None:
        factor = 1
        while True:
            if self.__jiggler_active and (self.__activity_ts + self.__jiggler_interval < int(time.monotonic())):
                for _ in range(5):
                    if self.__jiggler_absolute:
                        self.send_mouse_move_event(100 * factor, 100 * factor)
                    else:
                        self.send_mouse_relative_event(10 * factor, 10 * factor)
                    factor *= -1
                    await asyncio.sleep(0.1)
            await asyncio.sleep(1)


# =====
def get_hid_class(name: str) -> type[BaseHid]:
    return get_plugin_class("hid", name)  # type: ignore