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Merge branch 'master' of github.com:copycat-killer/lain
[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 local read_pipe       = require("lain.helpers").read_pipe
12
13 local wibox           = require("wibox")
14
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     level  = "0",
24     status = "off",
25 }
26
27 local function worker(args)
28     local args     = args or {}
29     local timeout  = args.timeout or 1
30     local settings = args.settings or function() end
31
32     alsa.cmd     = args.cmd or "amixer"
33     alsa.channel = args.channel or "Master"
34
35     alsa.widget = wibox.widget.textbox('')
36
37     function alsa.update()
38         local mixer = read_pipe(string.format("%s get %s", alsa.cmd, alsa.channel))
39
40         volume_now = {}
41
42         volume_now.level, volume_now.status = string.match(mixer, "([%d]+)%%.*%[([%l]*)")
43
44         if volume_now.level == nil
45         then
46             volume_now.level  = "0"
47             volume_now.status = "off"
48         end
49
50         if volume_now.status == ""
51         then
52             if volume_now.level == "0"
53             then
54                 volume_now.status = "off"
55             else
56                 volume_now.status = "on"
57             end
58         end
59
60         if alsa.level ~= volume_now.level or alsa.status ~= volume_now.status
61         then
62             widget = alsa.widget
63             settings()
64
65             alsa.level = volume_now.level
66             alsa.status = volume_now.status
67         end
68     end
69
70     timer_id = string.format("alsa-%s-%s", alsa.cmd, alsa.channel)
71
72     newtimer(timer_id, timeout, alsa.update)
73
74     return setmetatable(alsa, { __index = alsa.widget })
75 end
76
77 return setmetatable(alsa, { __call = function(_, ...) return worker(...) end })