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# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2022 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 ctypes
import ctypes.util
from typing import Generator
from .keysym import SymmapModifiers
from .mappings import WebModifiers
# =====
def _load_libxkbcommon() -> ctypes.CDLL:
path = ctypes.util.find_library("xkbcommon")
if not path:
raise RuntimeError("Where is libxkbcommon?")
assert path
lib = ctypes.CDLL(path)
for (name, restype, argtypes) in [
("xkb_utf32_to_keysym", ctypes.c_uint32, [ctypes.c_uint32]),
]:
func = getattr(lib, name)
if not func:
raise RuntimeError(f"Where is libc.{name}?")
setattr(func, "restype", restype)
setattr(func, "argtypes", argtypes)
return lib
_libxkbcommon = _load_libxkbcommon()
def _ch_to_keysym(ch: str) -> int:
assert len(ch) == 1
return _libxkbcommon.xkb_utf32_to_keysym(ord(ch))
# =====
def text_to_web_keys( # pylint: disable=too-many-branches
text: str,
symmap: dict[int, dict[int, str]],
) -> Generator[tuple[str, bool], None, None]:
shift = False
altgr = False
for ch in text:
# https://stackoverflow.com/questions/12343987/convert-ascii-character-to-x11-keycode
# https://www.ascii-code.com
if ch == "\n":
keys = {0: "Enter"}
elif ch == "\t":
keys = {0: "Tab"}
elif ch == " ":
keys = {0: "Space"}
else:
if ch in ["‚", "‘", "’"]:
ch = "'"
elif ch in ["„", "“", "”"]:
ch = "\""
elif ch == "–": # Short
ch = "-"
elif ch == "—": # Long
ch = "--"
if not ch.isprintable():
continue
try:
keys = symmap[_ch_to_keysym(ch)]
except Exception:
continue
for (modifiers, key) in keys.items():
if modifiers & SymmapModifiers.CTRL:
# Not supported yet
continue
if modifiers & SymmapModifiers.SHIFT and not shift:
yield (WebModifiers.SHIFT_LEFT, True)
shift = True
elif not (modifiers & SymmapModifiers.SHIFT) and shift:
yield (WebModifiers.SHIFT_LEFT, False)
shift = False
if modifiers & SymmapModifiers.ALTGR and not altgr:
yield (WebModifiers.ALT_RIGHT, True)
altgr = True
elif not (modifiers & SymmapModifiers.ALTGR) and altgr:
yield (WebModifiers.ALT_RIGHT, False)
altgr = False
yield (key, True)
yield (key, False)
break
if shift:
yield (WebModifiers.SHIFT_LEFT, False)
if altgr:
yield (WebModifiers.ALT_RIGHT, False)
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