keyboard: use XKB groups to switch between layouts

The use of XKB groups allow to switch between layouts with a key
combination (RCTRL + RSHIFT in our case). I don't need kbdd since I am
not really interested in switching keyboard layout per window.

rc.lua

@@ -67,7 +67,6 @@ loadrc("debug")			-- debugging primitive `dbg()`
 
 loadrc("start")			-- programs to run on start
 loadrc("bindings")		-- keybindings
-loadrc("keyboard")		-- keyboard configuration
 loadrc("wallpaper")		-- wallpaper settings
 loadrc("tags")			-- tags handling
 loadrc("widgets")		-- widgets configuration

rc/keyboard.lua

@@ -1,38 +0,0 @@
--- Keyboard configuration with kbdd
-
-local icons = loadrc("icons", "vbe/icons")
-
-local qdbus = {
-   check = "qdbus ru.gentoo.KbddService /ru/gentoo/KbddService",
-   next  = "qdbus ru.gentoo.KbddService /ru/gentoo/KbddService ru.gentoo.kbdd.next_layout"
-}
-
--- Display a notification if the layout changed
-local nid = nil
-dbus.request_name("session", "ru.gentoo.kbdd")
-dbus.add_match("session", "interface='ru.gentoo.kbdd',member='layoutNameChanged'")
-dbus.add_signal("ru.gentoo.kbdd",
-		function(...)
-		   local data = {...}
-		   local layout = data[2]
-		   local screen = mouse.screen
-		   if client.focus then screen = client.focus.screen end
-		   nid = naughty.notify({ title = "Keyboard layout changed",
-					  text = "New layout is <i>" .. layout .. "</i>",
-					  replaces_id = nid,
-					  icon = icons.lookup({ name = "keyboard",
-								type = "devices" }),
-					  screen = screen }).id
-		end)
-
-config.keys.global = awful.util.table.join(
-   config.keys.global,
-   awful.key({ modkey }, "=",
-	     function()
-		os.execute(qdbus.next)
-	     end, "Change keyboard layout"))
-
--- Run kbdd if not running
-if os.execute(qdbus.check .. " 2> /dev/null > /dev/null") ~= 0 then
-   awful.util.spawn("kbdd")
-end

rc/start.lua

@@ -23,12 +23,13 @@ local execute = {
    "xrdb -merge " .. awful.util.getdir("config") .. "/Xresources",
 }
 
+-- Keyboard/Mouse configuration
 if config.hostname == "naruto" then
    execute = awful.util.table.join(
       execute, {
 	 -- Keyboard and mouse
 	 "xset m 4 3",	-- Mouse acceleration
-	 "setxkbmap us,fr '' compose:rwin ctrl:nocaps",
+	 "setxkbmap us,fr '' compose:rwin ctrl:nocaps grp:rctrl_rshift_toggle",
 	 "xmodmap -e 'keysym Pause = XF86ScreenSaver'",
 	       })
 elseif config.hostname == "neo" then
@@ -36,14 +37,14 @@ elseif config.hostname == "neo" then
       execute, {
 	 -- Keyboard and mouse
 	 "xset m 3 3",	-- Mouse acceleration
-	 "setxkbmap us,fr '' compose:rwin ctrl:nocaps",
+	 "setxkbmap us,fr '' compose:rwin ctrl:nocaps grp:rctrl_rshift_toggle",
 	 "xmodmap -e 'keysym Pause = XF86ScreenSaver'",
 	       })
 elseif config.hostname == "guybrush" then
    execute = awful.util.table.join(
       execute, {
 	 -- Keyboard and mouse
-	 "setxkbmap us,fr '' compose:rctrl ctrl:nocaps",
+	 "setxkbmap us,fr '' compose:ralt ctrl:nocaps grp:rctrl_rshift_toggle",
 	 "xmodmap -e 'keysym XF86AudioPlay = XF86ScreenSaver'",
 	 -- Wheel emulation
 	 "xinput set-int-prop 'TPPS/2 IBM TrackPoint' 'Evdev Wheel Emulation' 8 1",