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Merge pull request #144 from stwa/patch-1
[etc/awesome.git] / widgets / contrib / kbdlayout.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2015, Dario Gjorgjevski               
6                                                   
7 --]]
8
9 local newtimer     = require("lain.helpers").newtimer
10 local read_pipe    = require("lain.helpers").read_pipe
11
12 local wibox        = require("wibox")
13 local awful        = require("awful")
14
15 local string       = { match = string.match }
16
17 local setmetatable = setmetatable
18
19 local function worker (args)
20    local kbdlayout    = {}
21    kbdlayout.widget   = wibox.widget.textbox('')
22
23    local layouts          = args.layouts
24    local settings         = args.settings or function () end
25    local add_us_secondary = true
26    local timeout          = args.timeout or 5
27
28    local idx              = 1
29    
30    if args.add_us_secondary == false then add_us_secondary = false end
31
32    -- Mouse bindings
33    kbdlayout.widget:buttons(awful.util.table.join(
34                               awful.button({ }, 1, function () kbdlayout.next() end),
35                               awful.button({ }, 3, function () kbdlayout.prev() end)))
36
37    local function run_settings (layout, variant)
38       widget = kbdlayout.widget
39       kbdlayout_now = { layout=string.match(layout, "[^,]+"), -- Make sure to match the primary layout only.
40                         variant=variant }
41       settings()
42    end
43
44    function kbdlayout.update ()
45       local status = read_pipe('setxkbmap -query')
46
47       run_settings(string.match(status, "layout:%s*([^\n]*)"),
48                    string.match(status, "variant:%s*([^\n]*)"))
49    end
50
51    function kbdlayout.set (i)
52       idx = ((i - 1) % #layouts) + 1 -- Make sure to wrap around as needed.
53       local to_execute = 'setxkbmap ' .. layouts[idx].layout
54
55       if add_us_secondary and not string.match(layouts[idx].layout, ",?us,?") then
56          to_execute = to_execute .. ",us"
57       end
58
59       if layouts[idx].variant then
60          to_execute = to_execute .. ' ' .. layouts[idx].variant
61       end
62
63       if os.execute(to_execute) then
64          run_settings(layouts[idx].layout, layouts[idx].variant)
65       end
66    end
67
68    function kbdlayout.next ()
69       kbdlayout.set(idx + 1)
70    end
71
72    function kbdlayout.prev ()
73       kbdlayout.set(idx - 1)
74    end
75
76    newtimer("kbdlayout", timeout, kbdlayout.update)
77    return setmetatable(kbdlayout, { __index = kbdlayout.widget })
78 end
79
80 return setmetatable({}, { __call = function (_, ...) return worker(...) end })