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Merge pull request #173 from guotsuan/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 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
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 mixer = read_pipe(string.format("%s get %s", alsa.cmd, alsa.channel))
36
37         volume_now = {}
38
39         volume_now.level, volume_now.status = string.match(mixer, "([%d]+)%%.*%[([%l]*)")
40
41         if volume_now.level == nil
42         then
43             volume_now.level  = "0"
44             volume_now.status = "off"
45         end
46
47         if volume_now.status == ""
48         then
49             if volume_now.level == "0"
50             then
51                 volume_now.status = "off"
52             else
53                 volume_now.status = "on"
54             end
55         end
56
57         widget = alsa.widget
58         settings()
59     end
60
61     timer_id = string.format("alsa-%s-%s", alsa.cmd, alsa.channel)
62
63     newtimer(timer_id, timeout, alsa.update)
64
65     return setmetatable(alsa, { __index = alsa.widget })
66 end
67
68 return setmetatable(alsa, { __call = function(_, ...) return worker(...) end })