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readme updated
[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
17 local setmetatable    = setmetatable
18
19 -- ALSA volume
20 -- lain.widgets.alsa
21 local alsa = {}
22
23 local function worker(args)
24     local args     = args or {}
25     local timeout  = args.timeout or 5
26     local channel  = args.channel or "Master"
27     local settings = args.settings or function() end
28
29     alsa.widget = wibox.widget.textbox('')
30
31     function alsa.update()
32         local f = assert(io.popen('amixer get ' .. channel))
33         local mixer = f:read("*all")
34         f:close()
35
36         volume_now = {}
37
38         volume_now.level, volume_now.status = string.match(mixer, "([%d]+)%%.*%[([%l]*)")
39
40         if volume_now.level == nil
41         then
42             volume_now.level  = "0"
43             volume_now.status = "off"
44         end
45
46         if volume_now.status == ""
47         then
48             if volume_now.level == "0"
49             then
50                 volume_now.status = "off"
51             else
52                 volume_now.status = "on"
53             end
54         end
55
56         widget = alsa.widget
57         settings()
58     end
59
60     newtimer("alsa", timeout, alsa.update)
61
62     return setmetatable(alsa, { __index = alsa.widget })
63 end
64
65 return setmetatable(alsa, { __call = function(_, ...) return worker(...) end })