mirror of
https://github.com/mofeng-git/One-KVM.git
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115 lines
4.3 KiB
Python
115 lines
4.3 KiB
Python
# ========================================================================== #
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# #
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# KVMD - The main Pi-KVM daemon. #
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# #
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# Copyright (C) 2020 Maxim Devaev <mdevaev@gmail.com> #
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# #
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# This program 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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# This program 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 this program. If not, see <https://www.gnu.org/licenses/>. #
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# #
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# ========================================================================== #
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import dataclasses
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import pkgutil
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import functools
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from typing import Dict
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import Xlib.keysymdef
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from ..logging import get_logger
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from .mappings import At1Key
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from .mappings import X11_TO_AT1
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from .mappings import AT1_TO_WEB
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# =====
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@dataclasses.dataclass(frozen=True)
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class SymmapWebKey:
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name: str
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shift: bool
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def build_symmap(path: str) -> Dict[int, SymmapWebKey]:
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# https://github.com/qemu/qemu/blob/95a9457fd44ad97c518858a4e1586a5498f9773c/ui/keymaps.c
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symmap: Dict[int, SymmapWebKey] = {}
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for (x11_code, at1_key) in X11_TO_AT1.items():
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symmap[x11_code] = SymmapWebKey(
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name=AT1_TO_WEB[at1_key.code],
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shift=at1_key.shift,
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)
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for (x11_code, at1_key) in _read_keyboard_layout(path).items():
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if (web_name := AT1_TO_WEB.get(at1_key.code)) is not None:
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symmap[x11_code] = SymmapWebKey(
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name=web_name,
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shift=at1_key.shift,
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)
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return symmap
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# =====
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@functools.lru_cache()
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def _get_keysyms() -> Dict[str, int]:
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keysyms: Dict[str, int] = {}
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for (loader, module_name, _) in pkgutil.walk_packages(Xlib.keysymdef.__path__):
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module = loader.find_module(module_name).load_module(module_name)
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for keysym_name in dir(module):
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if keysym_name.startswith("XK_"):
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short_name = keysym_name[3:]
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if short_name.startswith("XF86_"):
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short_name = "XF86" + short_name[5:]
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# assert short_name not in keysyms, short_name
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keysyms[short_name] = int(getattr(module, keysym_name))
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return keysyms
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def _resolve_keysym(name: str) -> int:
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code = _get_keysyms().get(name)
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if code is not None:
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return code
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if len(name) == 5 and name[0] == "U": # Try unicode Uxxxx
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try:
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return int(name[1:], 16)
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except ValueError:
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pass
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return 0
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def _read_keyboard_layout(path: str) -> Dict[int, At1Key]: # Keysym to evdev (at1)
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logger = get_logger(0)
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logger.info("Reading keyboard layout %s ...", path)
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with open(path) as layout_file:
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lines = list(map(str.strip, layout_file.read().split("\n")))
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layout: Dict[int, At1Key] = {}
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for (number, line) in enumerate(lines):
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if len(line) == 0 or line.startswith(("#", "map ", "include ")):
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continue
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parts = line.split()
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if len(parts) >= 2:
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if (code := _resolve_keysym(parts[0])) != 0:
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try:
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layout[code] = At1Key(
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code=int(parts[1], 16),
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shift=bool(len(parts) == 3 and parts[2] == "shift"),
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)
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except ValueError as err:
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logger.error("Can't parse layout line #%d: %s", number, str(err))
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return layout
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