Add kbdlayout system (Alt-Shift to switch layout)

rc.lua

@@ -110,6 +110,16 @@ menubar.utils.terminal = terminal -- Set the terminal for applications that requ
 -- Keyboard map indicator and switcher
 mykeyboardlayout = awful.widget.keyboardlayout()
 
+kbdlayout = {}
+kbdlayout.cmd = "setxkbmap"
+kbdlayout.layouts = { "fr", "us" }
+kbdlayout.cur = 1
+kbdlayout.switch = function()
+    kbdlayout.cur = (kbdlayout.cur % #(kbdlayout.layouts)) + 1
+    local t = kbdlayout.layouts[kbdlayout.cur]
+    os.execute( kbdlayout.cmd .. " " .. t )
+end
+
 -- {{{ Wibar
 -- Create a textclock widget
 mytextclock = wibox.widget.textclock()
@@ -388,7 +398,12 @@ globalkeys = gears.table.join(
               {description = "lua execute prompt", group = "awesome"}),
     -- Menubar
     awful.key({ modkey }, "p", function() menubar.show() end,
-              {description = "show the menubar", group = "launcher"})
+              {description = "show the menubar", group = "launcher"}),
+    -- Keyboard layout switch
+    awful.key({ "Mod1" }, "Shift_L", function () kbdlayout.switch() end,
+              {description = "switch keyboard layout"}),
+    awful.key({ "Shift" }, "Alt_L", function () kbdlayout.switch() end,
+              {description = "switch keyboard layout"})
 )
 
 clientkeys = gears.table.join(