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# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2020 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 pkgutil
import functools
import importlib.util
import importlib.machinery
import Xlib.keysymdef
from ..logging import get_logger
from .mappings import At1Key
from .mappings import WebModifiers
from .mappings import X11_TO_AT1
from .mappings import AT1_TO_WEB
# =====
class SymmapModifiers:
SHIFT: int = 0x1
ALTGR: int = 0x2
CTRL: int = 0x4
def build_symmap(path: str) -> dict[int, dict[int, str]]: # x11 keysym -> [(modifiers, webkey), ...]
# https://github.com/qemu/qemu/blob/95a9457fd44ad97c518858a4e1586a5498f9773c/ui/keymaps.c
logger = get_logger()
symmap: dict[int, dict[int, str]] = {}
for (src, items) in [
(path, list(_read_keyboard_layout(path).items())),
("<builtin>", list(X11_TO_AT1.items())),
]:
# Пока лучшая логика - самые первые записи в файле раскладки
# должны иметь приоритет над следующими, а дефолтный маппинг
# только дополняет отсутствующие значения.
for (code, keys) in items:
for key in keys:
web_name = AT1_TO_WEB.get(key.code)
if web_name is not None:
if (
(web_name in WebModifiers.SHIFTS and key.shift) # pylint: disable=too-many-boolean-expressions
or (web_name in WebModifiers.ALTS and key.altgr)
or (web_name in WebModifiers.CTRLS and key.ctrl)
):
logger.error("Invalid modifier key at mapping %s: %s / %s", src, web_name, key)
continue
modifiers = (
0
| (SymmapModifiers.SHIFT if key.shift else 0)
| (SymmapModifiers.ALTGR if key.altgr else 0)
| (SymmapModifiers.CTRL if key.ctrl else 0)
)
if code not in symmap:
symmap[code] = {}
symmap[code].setdefault(modifiers, web_name)
return symmap
# =====
@functools.lru_cache()
def _get_keysyms() -> dict[str, int]:
keysyms: dict[str, int] = {
"EuroSign": 0x20AC, # FIXME: https://github.com/python-xlib/python-xlib/pull/264
}
for (finder, module_name, _) in pkgutil.walk_packages(Xlib.keysymdef.__path__):
if not isinstance(finder, importlib.machinery.FileFinder):
continue
spec = finder.find_spec(module_name)
if spec is None or spec.loader is None:
continue
module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(module)
for keysym_name in dir(module):
if keysym_name.startswith("XK_"):
short_name = keysym_name[3:]
if short_name.startswith("XF86_"):
short_name = "XF86" + short_name[5:]
# assert short_name not in keysyms, short_name
keysyms[short_name] = int(getattr(module, keysym_name))
return keysyms
def _resolve_keysym(name: str) -> int:
code = _get_keysyms().get(name)
if code is not None:
return code
if len(name) == 5 and name[0] == "U": # Try unicode Uxxxx
try:
return int(name[1:], 16)
except ValueError:
pass
return 0
def _read_keyboard_layout(path: str) -> dict[int, list[At1Key]]: # Keysym to evdev (at1)
logger = get_logger(0)
logger.info("Reading keyboard layout %s ...", path)
with open(path) as file:
lines = list(map(str.strip, file.read().split("\n")))
layout: dict[int, list[At1Key]] = {}
for (lineno, line) in enumerate(lines):
if len(line) == 0 or line.startswith(("#", "map ", "include ")):
continue
parts = line.split()
if len(parts) >= 2:
x11_code = _resolve_keysym(parts[0])
if x11_code == 0:
continue
try:
at1_code = int(parts[1], 16)
except ValueError as err:
logger.error("Syntax error at %s:%d: %s", path, lineno, err)
continue
rest = parts[2:]
if x11_code not in layout:
layout[x11_code] = []
layout[x11_code].append(At1Key(
code=at1_code,
shift=("shift" in rest),
altgr=("altgr" in rest),
ctrl=("ctrl" in rest),
))
if "addupper" in rest:
x11_code = _resolve_keysym(parts[0].upper())
if x11_code != 0:
if x11_code not in layout:
layout[x11_code] = []
layout[x11_code].append(At1Key(
code=at1_code,
shift=True,
))
return layout
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