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alsa, alsabar: make amixer call customizable; fixes #111 in general
[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 timeout  = args.timeout or 5
27     local settings = args.settings or function() end
28
29     alsa.cmd     = args.cmd or "amixer"
30     alsa.channel = args.channel or "Master"
31
32     alsa.widget = wibox.widget.textbox('')
33
34     function alsa.update()
35         local f = assert(io.popen(string.format("%s get %s", alsa.cmd, alsa.channel)))
36         local mixer = f:read("*a")
37         f:close()
38
39         volume_now = {}
40
41         volume_now.level, volume_now.status = string.match(mixer, "([%d]+)%%.*%[([%l]*)")
42
43         if volume_now.level == nil
44         then
45             volume_now.level  = "0"
46             volume_now.status = "off"
47         end
48
49         if volume_now.status == ""
50         then
51             if volume_now.level == "0"
52             then
53                 volume_now.status = "off"
54             else
55                 volume_now.status = "on"
56             end
57         end
58
59         widget = alsa.widget
60         settings()
61     end
62
63     newtimer("alsa", timeout, alsa.update)
64
65     return setmetatable(alsa, { __index = alsa.widget })
66 end
67
68 return setmetatable(alsa, { __call = function(_, ...) return worker(...) end })