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122 lines
4.1 KiB
122 lines
4.1 KiB
from winreg import HKEY_CURRENT_USER as hkey, QueryValueEx as getSubkeyValue, OpenKey as getKey
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import ctypes
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import ctypes.wintypes
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advapi32 = ctypes.windll.advapi32
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# LSTATUS RegOpenKeyExA(
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# HKEY hKey,
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# LPCSTR lpSubKey,
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# DWORD ulOptions,
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# REGSAM samDesired,
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# PHKEY phkResult
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# );
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advapi32.RegOpenKeyExA.argtypes = (
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ctypes.wintypes.HKEY,
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ctypes.wintypes.LPCSTR,
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ctypes.wintypes.DWORD,
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ctypes.wintypes.DWORD,
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ctypes.POINTER(ctypes.wintypes.HKEY),
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)
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advapi32.RegOpenKeyExA.restype = ctypes.wintypes.LONG
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# LSTATUS RegQueryValueExA(
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# HKEY hKey,
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# LPCSTR lpValueName,
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# LPDWORD lpReserved,
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# LPDWORD lpType,
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# LPBYTE lpData,
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# LPDWORD lpcbData
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# );
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advapi32.RegQueryValueExA.argtypes = (
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ctypes.wintypes.HKEY,
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ctypes.wintypes.LPCSTR,
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ctypes.wintypes.LPDWORD,
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ctypes.wintypes.LPDWORD,
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ctypes.wintypes.LPBYTE,
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ctypes.wintypes.LPDWORD,
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)
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advapi32.RegQueryValueExA.restype = ctypes.wintypes.LONG
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# LSTATUS RegNotifyChangeKeyValue(
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# HKEY hKey,
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# WINBOOL bWatchSubtree,
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# DWORD dwNotifyFilter,
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# HANDLE hEvent,
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# WINBOOL fAsynchronous
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# );
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advapi32.RegNotifyChangeKeyValue.argtypes = (
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ctypes.wintypes.HKEY,
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ctypes.wintypes.BOOL,
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ctypes.wintypes.DWORD,
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ctypes.wintypes.HANDLE,
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ctypes.wintypes.BOOL,
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)
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advapi32.RegNotifyChangeKeyValue.restype = ctypes.wintypes.LONG
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def theme():
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""" Uses the Windows Registry to detect if the user is using Dark Mode """
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# Registry will return 0 if Windows is in Dark Mode and 1 if Windows is in Light Mode. This dictionary converts that output into the text that the program is expecting.
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valueMeaning = {0: "Dark", 1: "Light"}
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# In HKEY_CURRENT_USER, get the Personalisation Key.
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try:
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key = getKey(hkey, "Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize")
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# In the Personalisation Key, get the AppsUseLightTheme subkey. This returns a tuple.
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# The first item in the tuple is the result we want (0 or 1 indicating Dark Mode or Light Mode); the other value is the type of subkey e.g. DWORD, QWORD, String, etc.
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subkey = getSubkeyValue(key, "AppsUseLightTheme")[0]
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except FileNotFoundError:
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# some headless Windows instances (e.g. GitHub Actions or Docker images) do not have this key
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return None
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return valueMeaning[subkey]
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def isDark():
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if theme() is not None:
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return theme() == 'Dark'
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def isLight():
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if theme() is not None:
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return theme() == 'Light'
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#def listener(callback: typing.Callable[[str], None]) -> None:
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def listener(callback):
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hKey = ctypes.wintypes.HKEY()
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advapi32.RegOpenKeyExA(
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ctypes.wintypes.HKEY(0x80000001), # HKEY_CURRENT_USER
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ctypes.wintypes.LPCSTR(b'SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize'),
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ctypes.wintypes.DWORD(),
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ctypes.wintypes.DWORD(0x00020019), # KEY_READ
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ctypes.byref(hKey),
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)
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dwSize = ctypes.wintypes.DWORD(ctypes.sizeof(ctypes.wintypes.DWORD))
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queryValueLast = ctypes.wintypes.DWORD()
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queryValue = ctypes.wintypes.DWORD()
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advapi32.RegQueryValueExA(
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hKey,
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ctypes.wintypes.LPCSTR(b'AppsUseLightTheme'),
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ctypes.wintypes.LPDWORD(),
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ctypes.wintypes.LPDWORD(),
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ctypes.cast(ctypes.byref(queryValueLast), ctypes.wintypes.LPBYTE),
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ctypes.byref(dwSize),
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)
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while True:
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advapi32.RegNotifyChangeKeyValue(
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hKey,
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ctypes.wintypes.BOOL(True),
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ctypes.wintypes.DWORD(0x00000004), # REG_NOTIFY_CHANGE_LAST_SET
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ctypes.wintypes.HANDLE(None),
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ctypes.wintypes.BOOL(False),
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)
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advapi32.RegQueryValueExA(
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hKey,
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ctypes.wintypes.LPCSTR(b'AppsUseLightTheme'),
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ctypes.wintypes.LPDWORD(),
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ctypes.wintypes.LPDWORD(),
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ctypes.cast(ctypes.byref(queryValue), ctypes.wintypes.LPBYTE),
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ctypes.byref(dwSize),
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)
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if queryValueLast.value != queryValue.value:
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queryValueLast.value = queryValue.value
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callback('Light' if queryValue.value else 'Dark')
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