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"""
core/file_association.py
Self-registers LabUI as the handler for .labui files with the OS, so
double-clicking one launches the app — Windows (registry) and Linux (XDG).
User-scoped, no admin/root rights needed.
macOS doesn't need any of this: labui.spec builds a real .app bundle with
CFBundleDocumentTypes baked into Info.plist at build time, which is enough
for Finder to associate .labui files with it automatically.
Only meaningful for a packaged build (sys.frozen, set by PyInstaller) —
registering the bare Python interpreter as the handler for "python.exe
main.py" isn't useful, so callers should gate the UI action on that.
"""
from __future__ import annotations
import os
import sys
import subprocess
from typing import Optional
_PROG_ID = "LabUI.Profile"
_EXT = ".labui"
_MIME_TYPE = "application/x-labui"
def _exe_path() -> str:
return sys.executable
def is_registered() -> bool:
if sys.platform.startswith("win"):
return _win_is_registered()
if sys.platform.startswith("linux"):
return _linux_is_registered()
return False
def register() -> Optional[str]:
"""Register .labui with this app. Returns an error string, or None on success."""
try:
if sys.platform.startswith("win"):
_win_register()
elif sys.platform.startswith("linux"):
_linux_register()
else:
return f"File association isn't needed on this platform ({sys.platform})."
return None
except Exception as e:
return str(e)
def unregister() -> Optional[str]:
"""Remove the association. Returns an error string, or None on success."""
try:
if sys.platform.startswith("win"):
_win_unregister()
elif sys.platform.startswith("linux"):
_linux_unregister()
return None
except Exception as e:
return str(e)
# ── Windows ──────────────────────────────────────────────────────────────────
def _win_is_registered() -> bool:
import winreg
try:
with winreg.OpenKey(winreg.HKEY_CURRENT_USER,
f"Software\\Classes\\{_EXT}") as k:
value, _ = winreg.QueryValueEx(k, "")
return value == _PROG_ID
except FileNotFoundError:
return False
def _win_register():
import winreg
exe = _exe_path()
with winreg.CreateKey(winreg.HKEY_CURRENT_USER,
f"Software\\Classes\\{_EXT}") as k:
winreg.SetValueEx(k, "", 0, winreg.REG_SZ, _PROG_ID)
with winreg.CreateKey(winreg.HKEY_CURRENT_USER,
f"Software\\Classes\\{_PROG_ID}") as k:
winreg.SetValueEx(k, "", 0, winreg.REG_SZ, "LabUI Profile")
with winreg.CreateKey(winreg.HKEY_CURRENT_USER,
f"Software\\Classes\\{_PROG_ID}\\DefaultIcon") as k:
winreg.SetValueEx(k, "", 0, winreg.REG_SZ, f'"{exe}",0')
with winreg.CreateKey(winreg.HKEY_CURRENT_USER,
f"Software\\Classes\\{_PROG_ID}\\shell\\open\\command") as k:
winreg.SetValueEx(k, "", 0, winreg.REG_SZ, f'"{exe}" "%1"')
_win_notify_shell()
def _win_unregister():
import winreg
for path in (
f"Software\\Classes\\{_PROG_ID}\\shell\\open\\command",
f"Software\\Classes\\{_PROG_ID}\\shell\\open",
f"Software\\Classes\\{_PROG_ID}\\shell",
f"Software\\Classes\\{_PROG_ID}\\DefaultIcon",
f"Software\\Classes\\{_PROG_ID}",
f"Software\\Classes\\{_EXT}",
):
try:
winreg.DeleteKey(winreg.HKEY_CURRENT_USER, path)
except FileNotFoundError:
pass
_win_notify_shell()
def _win_notify_shell():
"""Tell Explorer the file-type association changed — otherwise it keeps
showing the old icon/handler until logoff or reboot."""
try:
import ctypes
SHCNE_ASSOCCHANGED = 0x08000000
SHCNF_IDLIST = 0x0000
ctypes.windll.shell32.SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, None, None)
except Exception:
pass
# ── Linux (XDG) ──────────────────────────────────────────────────────────────
def _xdg_data_home() -> str:
return os.environ.get("XDG_DATA_HOME") or os.path.join(os.path.expanduser("~"), ".local", "share")
def _desktop_file_path() -> str:
return os.path.join(_xdg_data_home(), "applications", "labui.desktop")
def _mime_package_path() -> str:
return os.path.join(_xdg_data_home(), "mime", "packages", "labui-labui.xml")
def _linux_is_registered() -> bool:
return os.path.isfile(_desktop_file_path())
def _linux_register():
exe = _exe_path()
desktop_path = _desktop_file_path()
os.makedirs(os.path.dirname(desktop_path), exist_ok=True)
with open(desktop_path, "w") as f:
f.write(
"[Desktop Entry]\n"
"Type=Application\n"
"Name=LabUI\n"
f"Exec={exe} %f\n"
"Terminal=false\n"
f"MimeType={_MIME_TYPE};\n"
"NoDisplay=true\n"
)
mime_path = _mime_package_path()
os.makedirs(os.path.dirname(mime_path), exist_ok=True)
with open(mime_path, "w") as f:
f.write(
'<?xml version="1.0" encoding="UTF-8"?>\n'
'<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">\n'
f' <mime-type type="{_MIME_TYPE}">\n'
' <comment>LabUI Profile</comment>\n'
f' <glob pattern="*{_EXT}"/>\n'
' </mime-type>\n'
'</mime-info>\n'
)
# Best-effort — desktop-environment dependent, the glob-matched .desktop
# file alone is often enough even if these tools/steps are unavailable.
_run_best_effort(["update-desktop-database", os.path.join(_xdg_data_home(), "applications")])
_run_best_effort(["update-mime-database", os.path.join(_xdg_data_home(), "mime")])
_run_best_effort(["xdg-mime", "default", "labui.desktop", _MIME_TYPE])
def _linux_unregister():
for path in (_desktop_file_path(), _mime_package_path()):
try:
os.remove(path)
except FileNotFoundError:
pass
_run_best_effort(["update-desktop-database", os.path.join(_xdg_data_home(), "applications")])
_run_best_effort(["update-mime-database", os.path.join(_xdg_data_home(), "mime")])
def _run_best_effort(cmd: list):
try:
subprocess.run(cmd, check=False, capture_output=True, timeout=5)
except Exception:
pass
|
