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wiki 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     widget = wibox.widget.textbox('')
30
31     function update()
32         local f = io.popen('amixer get ' .. channel)
33         local mixer = f:read("*all")
34         f:close()
35
36         volume = {}
37
38         volume.level, volume.status = string.match(mixer, "([%d]+)%%.*%[([%l]*)")
39
40         if volume.level == nil
41         then
42             volume.level  = 0
43             volume.status = "off"
44         end
45
46         if volume.status == ""
47         then
48             if volume.level == 0
49             then
50                 volume.status = "off"
51             else
52                 volume.status = "on"
53             end
54         end
55
56         settings()
57     end
58
59     newtimer("alsa", timeout, update)
60
61     output = { widget = widget, notify = update }
62
63     return setmetatable(output, { __index = output.widget })
64 end
65
66 return setmetatable(alsa, { __call = function(_, ...) return worker(...) end })