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Add a card attribute for alsa and alsabar
[etc/awesome.git] / widgets / alsa.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2013, Luke Bonham                     
6       * (c) 2010, Adrian C. <anrxc@sysphere.org>  
7                                                   
8 --]]
9
10 local newtimer        = require("lain.helpers").newtimer
11
12 local wibox           = require("wibox")
13
14 local io              = { popen  = io.popen }
15 local string          = { match  = string.match,
16                           format = string.format }
17
18 local setmetatable    = setmetatable
19
20 -- ALSA volume
21 -- lain.widgets.alsa
22 local alsa = {}
23
24 local function worker(args)
25     local args     = args or {}
26     local card     = args.card or "0"
27     local timeout  = args.timeout or 5
28     local channel  = args.channel or "Master"
29     local settings = args.settings or function() end
30
31     alsa.widget = wibox.widget.textbox('')
32
33     function alsa.update()
34         local f = assert(io.popen(string.format("amixer -c %s -M get %s", card, channel)))
35         local mixer = f:read("*a")
36         f:close()
37
38         volume_now = {}
39
40         volume_now.level, volume_now.status = string.match(mixer, "([%d]+)%%.*%[([%l]*)")
41
42         if volume_now.level == nil
43         then
44             volume_now.level  = "0"
45             volume_now.status = "off"
46         end
47
48         if volume_now.status == ""
49         then
50             if volume_now.level == "0"
51             then
52                 volume_now.status = "off"
53             else
54                 volume_now.status = "on"
55             end
56         end
57
58         widget = alsa.widget
59         settings()
60     end
61
62     newtimer("alsa", timeout, alsa.update)
63
64     return setmetatable(alsa, { __index = alsa.widget })
65 end
66
67 return setmetatable(alsa, { __call = function(_, ...) return worker(...) end })