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Merge pull request #275 from ProfessorOptics/master
[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 helpers      = require("lain.helpers")
11 local wibox        = require("wibox")
12 local string       = { match  = string.match,
13                        format = string.format }
14 local setmetatable = setmetatable
15
16 -- ALSA volume
17 -- lain.widgets.alsa
18 local alsa = helpers.make_widget_textbox()
19
20 local function worker(args)
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.last    = {}
28
29     function alsa.update()
30         helpers.async(alsa.cmd, function(mixer)
31             local l,s = string.match(mixer, "([%d]+)%%.*%[([%l]*)")
32             if alsa.last.level ~= l or alsa.last.status ~= s then
33                 volume_now = { level = l, status = s }
34                 widget = alsa.widget
35                 settings()
36                 alsa.last = volume_now
37             end
38         end)
39     end
40
41     timer_id = string.format("alsa-%s-%s", alsa.cmd, alsa.channel)
42     helpers.newtimer(timer_id, timeout, alsa.update)
43
44     return alsa
45 end
46
47 return setmetatable(alsa, { __call = function(_, ...) return worker(...) end })