#!/usr/bin/python

from gi.repository import Xkl, Gdk, GdkX11

def item_str(s):
    '''Convert a zero-terminated byte array to a proper str'''

    i = s.find(b'\x00')
    return s[:i].decode("utf-8")

switching_options = list()

def _get_switch_option(c_reg, item, user_data=None):
    """Helper function storing layout switching options in foreach cycle"""
    desc = item_str(item.description)
    name = item_str(item.name)
    
    global switching_options
    
    switching_options.append((name, desc))

display = GdkX11.x11_get_default_xdisplay()
engine = Xkl.Engine.get_instance(display)
configreg = Xkl.ConfigRegistry.get_instance(engine)
configreg.load(False)

#'grp' means that we want layout (group) switching options
configreg.foreach_option('grp', _get_switch_option, None)

for (name, description) in switching_options:
    print "%s [%s]" % (description, name)