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Diffstat (limited to 'kvmd/apps/vnc/keysym.py')
| -rw-r--r-- | kvmd/apps/vnc/keysym.py | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/kvmd/apps/vnc/keysym.py b/kvmd/apps/vnc/keysym.py new file mode 100644 index 00000000..5f35c28b --- /dev/null +++ b/kvmd/apps/vnc/keysym.py @@ -0,0 +1,97 @@ +# ========================================================================== # +# # +# KVMD - The main Pi-KVM 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 + +from typing import Dict + +import Xlib.keysymdef + +from ...logging import get_logger + +from ... import keymap + + +# ===== +def build_symmap(path: str) -> Dict[int, str]: + # https://github.com/qemu/qemu/blob/95a9457fd44ad97c518858a4e1586a5498f9773c/ui/keymaps.c + + symmap: Dict[int, str] = {} + for (x11_code, at1_code) in keymap.X11_TO_AT1.items(): + symmap[x11_code] = keymap.AT1_TO_WEB[at1_code] + + for (x11_code, at1_code) in _read_keyboard_layout(path).items(): + if (web_name := keymap.AT1_TO_WEB.get(at1_code)) is not None: # noqa: E203,E231 + # mypy bug + symmap[x11_code] = web_name # type: ignore + return symmap + + +# ===== [email protected]_cache() +def _get_keysyms() -> Dict[str, int]: + keysyms: Dict[str, int] = {} + for (loader, module_name, _) in pkgutil.walk_packages(Xlib.keysymdef.__path__): + module = loader.find_module(module_name).load_module(module_name) + 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, int]: # Keysym to evdev (at1) + logger = get_logger(0) + logger.info("Reading keyboard layout %s ...", path) + + with open(path) as layout_file: + lines = list(map(str.strip, layout_file.read().split("\n"))) + + layout: Dict[int, int] = {} + for (number, line) in enumerate(lines): + if len(line) == 0 or line.startswith(("#", "map ", "include ")): + continue + + parts = line.split() + if len(parts) >= 2: + if (code := _resolve_keysym(parts[0])) != 0: # noqa: E203,E231 + try: + layout[code] = int(parts[1], 16) + except ValueError as err: + logger.error("Can't parse layout line #%d: %s", number, str(err)) + return layout |