Do not depend on glfw just to parse the config file

kitty/key_names.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2019, Kovid Goyal <kovid at kovidgoyal.net>
+
+import sys
+
+from .constants import is_macos
+
+
+def null_lookup(name, case_sensitive=False):
+    pass
+
+
+if is_macos:
+    def get_key_name_lookup():
+        return null_lookup
+else:
+
+    def load_libxkb_lookup():
+        import ctypes
+        lib = ctypes.CDLL('libxkbcommon.so')
+        f = lib.xkb_keysym_from_name
+        f.argtypes = [ctypes.c_char_p, ctypes.c_int]
+        f.restype = ctypes.c_int
+
+        def xkb_lookup(name, case_sensitive=False):
+            name = name.encode('utf-8')
+            return f(name, int(case_sensitive)) or None
+
+        return xkb_lookup
+
+    def get_key_name_lookup():
+        ans = getattr(get_key_name_lookup, 'ans', None)
+        if ans is None:
+            try:
+                ans = load_libxkb_lookup()
+            except Exception as e:
+                print('Failed to load libxkbcommon.xkb_keysym_from_name with error:', e, file=sys.stderr)
+                ans = null_lookup
+            get_key_name_lookup.ans = ans
+        return ans