#!/usr/bin/env python
from __future__ import print_function
import re
import os

# expected format:
# #define XF86XK_FooBar _EVDEVK(0x123) /* some optional comment */
evdev_pattern = re.compile(r'^#define\s+XF86XK_(?P<name>\w+)\s+_EVDEVK\((?P<value>0x[0-9A-Fa-f]+)\)')

prefix = os.environ.get('X11_HEADERS_PREFIX', '/usr')
HEADERS = [
    prefix + '/include/X11/keysymdef.h',
    prefix + '/include/X11/XF86keysym.h',
    prefix + '/include/X11/Sunkeysym.h',
    prefix + '/include/X11/DECkeysym.h',
    prefix + '/include/X11/HPkeysym.h',
]

print('''#ifndef _XKBCOMMON_KEYSYMS_H
#define _XKBCOMMON_KEYSYMS_H

/* This file is autogenerated; please do not commit directly. */

/**
 * @file
 * Key symbols (keysyms) definitions.
 */

#define XKB_KEY_NoSymbol                    0x000000  /* Special KeySym */
''')
for path in HEADERS:
    with open(path) as header:
        for line in header:
            if '#ifdef' in line or '#ifndef' in line or '#endif' in line:
                continue

            # Remove #define _OSF_Keysyms and such.
            if '#define _' in line:
                continue

            # Handle a duplicate definition in HPkeysyms.h which kicks in if
            # it's not already defined.
            if 'XK_Ydiaeresis' in line and '0x100000ee' in line:
                continue

            # Replace the xorgproto _EVDEVK macro with the actual value
            # 0x10081000 is the base, the evdev hex code is added to that.
            # We replace to make parsing of the keys later easier.
            match = re.match(evdev_pattern, line)
            if match:
                value = 0x10081000 + int(match.group('value'), 16)
                line = re.sub(r'_EVDEVK\(0x([0-9A-Fa-f]+)\)', '{:#x}'.format(value), line)

            line = re.sub(r'#define\s*(\w*)XK_', r'#define XKB_KEY_\1', line)

            print(line, end='')
print('\n\n#endif')