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[etc/awesome.git] / .config / awesome / lain / widget / 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 helpers = require("lain.helpers")
11 local shell   = require("awful.util").shell
12 local wibox   = require("wibox")
13 local string  = { match  = string.match,
14                   format = string.format }
15
16 -- ALSA volume
17 -- lain.widget.alsa
18
19 local function factory(args)
20     local alsa     = { widget = wibox.widget.textbox() }
21     local args     = args or {}
22     local timeout  = args.timeout or 5
23     local settings = args.settings or function() end
24
25     alsa.cmd           = args.cmd or "amixer"
26     alsa.channel       = args.channel or "Master"
27     alsa.togglechannel = args.togglechannel
28
29     local format_cmd = string.format("%s get %s", alsa.cmd, alsa.channel)
30
31     if alsa.togglechannel then
32         format_cmd = { shell, "-c", string.format("%s get %s; %s get %s",
33         alsa.cmd, alsa.channel, alsa.cmd, alsa.togglechannel) }
34     end
35
36     alsa.last = {}
37
38     function alsa.update()
39         helpers.async(format_cmd, function(mixer)
40             local l,s = string.match(mixer, "([%d]+)%%.*%[([%l]*)")
41             if alsa.last.level ~= l or alsa.last.status ~= s then
42                 volume_now = { level = l, status = s }
43                 widget = alsa.widget
44                 settings()
45                 alsa.last = volume_now
46             end
47         end)
48     end
49
50     helpers.newtimer(string.format("alsa-%s-%s", alsa.cmd, alsa.channel), timeout, alsa.update)
51
52     return alsa
53 end
54
55 return factory