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calendar: fix async hanging notifications; closes #289
[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 helpers      = require("lain.helpers")
10 local awful        = require("awful")
11 local wibox        = require("wibox")
12 local string       = { format = string.format,
13                        match  = string.match }
14 local execute      = os.execute
15 local setmetatable = setmetatable
16
17 -- Keyboard layout switcher
18 -- lain.widgets.contrib.kblayout
19 local kbdlayout = helpers.make_widget_textbox()
20
21 local function worker(args)
22    local args             = args or {}
23    local layouts          = args.layouts or {}
24    local settings         = args.settings or function () end
25    local add_us_secondary = true
26    local timeout          = args.timeout or 5
27    local idx              = 1
28
29    if args.add_us_secondary == false then add_us_secondary = false end
30
31    local function kbd_run_settings(layout, variant)
32       kbdlayout_now = {
33           layout  = string.match(layout, "[^,]+"), -- Make sure to match the primary layout only.
34           variant = variant
35       }
36       widget = kbdlayout.widget
37       settings()
38    end
39
40    function kbdlayout.update()
41       helpers.async("setxkbmap -query", function(status)
42           kbd_run_settings(string.match(status, "layout:%s*([^\n]*)"),
43           string.match(status, "variant:%s*([^\n]*)"))
44       end)
45    end
46
47    function kbdlayout.set(i)
48       if #layouts == 0 then return end
49       idx = ((i - 1) % #layouts) + 1 -- Make sure to wrap around as needed.
50       local to_execute = "setxkbmap " .. layouts[idx].layout
51
52       if add_us_secondary and not string.match(layouts[idx].layout, ",?us,?") then
53          to_execute = to_execute .. ",us"
54       end
55
56       if layouts[idx].variant then
57          to_execute = to_execute .. " " .. layouts[idx].variant
58       end
59
60       if execute(to_execute) then
61          kbd_run_settings(layouts[idx].layout, layouts[idx].variant)
62       end
63    end
64
65    function kbdlayout.next() kbdlayout.set(idx + 1) end
66    function kbdlayout.prev() kbdlayout.set(idx - 1) end
67
68    -- Mouse bindings
69    kbdlayout.widget:buttons(awful.util.table.join(
70                               awful.button({ }, 1, function () kbdlayout.next() end),
71                               awful.button({ }, 3, function () kbdlayout.prev() end)))
72
73    helpers.newtimer("kbdlayout", timeout, kbdlayout.update)
74
75    return kbdlayout
76 end
77
78 return setmetatable({}, { __call = function (_, ...) return worker(...) end })