Umstellung auf Customtkinter.

.venv/Lib/site-packages/darkdetect/_mac_detect.py

@@ -0,0 +1,124 @@
+#-----------------------------------------------------------------------------
+#  Copyright (C) 2019 Alberto Sottile
+#
+#  Distributed under the terms of the 3-clause BSD License.
+#-----------------------------------------------------------------------------
+
+import ctypes
+import ctypes.util
+import subprocess
+import sys
+import os
+from pathlib import Path
+from typing import Callable
+
+try:
+    from Foundation import NSObject, NSKeyValueObservingOptionNew, NSKeyValueChangeNewKey, NSUserDefaults
+    from PyObjCTools import AppHelper
+    _can_listen = True
+except ModuleNotFoundError:
+    _can_listen = False
+
+
+try:
+    # macOS Big Sur+ use "a built-in dynamic linker cache of all system-provided libraries"
+    appkit = ctypes.cdll.LoadLibrary('AppKit.framework/AppKit')
+    objc = ctypes.cdll.LoadLibrary('libobjc.dylib')
+except OSError:
+    # revert to full path for older OS versions and hardened programs
+    appkit = ctypes.cdll.LoadLibrary(ctypes.util.find_library('AppKit'))
+    objc = ctypes.cdll.LoadLibrary(ctypes.util.find_library('objc'))
+
+void_p = ctypes.c_void_p
+ull = ctypes.c_uint64
+
+objc.objc_getClass.restype = void_p
+objc.sel_registerName.restype = void_p
+
+# See https://docs.python.org/3/library/ctypes.html#function-prototypes for arguments description
+MSGPROTOTYPE = ctypes.CFUNCTYPE(void_p, void_p, void_p, void_p)
+msg = MSGPROTOTYPE(('objc_msgSend', objc), ((1 ,'', None), (1, '', None), (1, '', None)))
+
+def _utf8(s):
+    if not isinstance(s, bytes):
+        s = s.encode('utf8')
+    return s
+
+def n(name):
+    return objc.sel_registerName(_utf8(name))
+
+def C(classname):
+    return objc.objc_getClass(_utf8(classname))
+
+def theme():
+    NSAutoreleasePool = objc.objc_getClass('NSAutoreleasePool')
+    pool = msg(NSAutoreleasePool, n('alloc'))
+    pool = msg(pool, n('init'))
+
+    NSUserDefaults = C('NSUserDefaults')
+    stdUserDef = msg(NSUserDefaults, n('standardUserDefaults'))
+
+    NSString = C('NSString')
+
+    key = msg(NSString, n("stringWithUTF8String:"), _utf8('AppleInterfaceStyle'))
+    appearanceNS = msg(stdUserDef, n('stringForKey:'), void_p(key))
+    appearanceC = msg(appearanceNS, n('UTF8String'))
+
+    if appearanceC is not None:
+        out = ctypes.string_at(appearanceC)
+    else:
+        out = None
+
+    msg(pool, n('release'))
+
+    if out is not None:
+        return out.decode('utf-8')
+    else:
+        return 'Light'
+
+def isDark():
+    return theme() == 'Dark'
+
+def isLight():
+    return theme() == 'Light'
+
+
+def _listen_child():
+    """
+    Run by a child process, install an observer and print theme on change
+    """
+    import signal
+    signal.signal(signal.SIGINT, signal.SIG_IGN)
+
+    OBSERVED_KEY = "AppleInterfaceStyle"
+
+    class Observer(NSObject):
+        def observeValueForKeyPath_ofObject_change_context_(
+            self, path, object, changeDescription, context
+        ):
+            result = changeDescription[NSKeyValueChangeNewKey]
+            try:
+                print(f"{'Light' if result is None else result}", flush=True)
+            except IOError:
+                os._exit(1)
+
+    observer = Observer.new()  # Keep a reference alive after installing
+    defaults = NSUserDefaults.standardUserDefaults()
+    defaults.addObserver_forKeyPath_options_context_(
+        observer, OBSERVED_KEY, NSKeyValueObservingOptionNew, 0
+    )
+
+    AppHelper.runConsoleEventLoop()
+
+
+def listener(callback: Callable[[str], None]) -> None:
+    if not _can_listen:
+        raise NotImplementedError()
+    with subprocess.Popen(
+        (sys.executable, "-c", "import _mac_detect as m; m._listen_child()"),
+        stdout=subprocess.PIPE,
+        universal_newlines=True,
+        cwd=Path(__file__).parent,
+    ) as p:
+        for line in p.stdout:
+            callback(line.strip())