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@vzaliva /set_lang.py
Last active Jan 16, 2017

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Script to toggle between the two last used language in Gnome
#!/usr/bin/env python3
#
# Script to toggle between the two last used language in Gnome
#
# History:
#
# Original script by Jacob Vlijm
# Saving last language and togging: Vadim Zaliva
#
# See also: http://askubuntu.com/questions/871678/how-can-i-quickly-switch-between-two-out-of-multiple-languages
#
import subprocess
import sys
from gi.repository import Gio
LAST = '/dev/shm/last-input.txt'
SCHEMA = 'org.gnome.desktop.input-sources'
KEY = 'current'
def read_last():
try:
with open(LAST, 'r') as f:
return tuple(map(int, f.read().split(',')))
except:
return (0,0)
def write_last(v0,v1):
with open(LAST, 'w') as f:
return f.write(str.join(",",(str(v0),str(v1))))
g = Gio.Settings.new(SCHEMA)
c = g.get_uint(KEY)
# read previous transition l->c0
(l,c0) = read_last()
if c0 != c:
# switch via menu detected
l = c0
if l == c:
# we are stuck!
if l != 0:
# if we stuck at non-0, switching to source 0
# which is assumed to be always present is an alternative
l = 0
else:
# if we stuck at source #0 try to pick up an alternative
# see if we have more than one, and switch to #1
if len(g.get_value('sources')) > 1:
l = 1
g.set_uint(KEY,l)
# write current transition c->l
write_last(c,l)
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