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[etc/awesome.git] / widgets / alsa.lua
1
2 --[[
3                                                       
4      Licensed under GNU General Public License v2     
5       * (c) 2013,      Luke Bonham                    
6       * (c) 2010-2012, Peter Hofmann                  
7       * (c) 2010,      Adrian C. <anrxc@sysphere.org> 
8                                                       
9 --]]
10
11 local markup          = require("lain.util.markup")
12 local run_in_terminal = require("lain.helpers").run_in_terminal
13
14 local awful           = require("awful")
15 local beautiful       = require("beautiful")
16 local wibox           = require("wibox")
17
18 local io              = io
19 local string          = { format = string.format,
20                           match  = string.match }
21
22 local setmetatable    = setmetatable
23
24 -- ALSA volume infos
25 -- nain.widgets.alsa
26 local alsa = {
27     volume = 0,
28     mute = false,
29 }
30
31 function worker(args)
32     local args = args or {}
33     local channel = args.channel or "Master"
34     local step = args.step or "1%"
35     local header = args.header or " Vol "
36     local header_color = args.header_color or beautiful.fg_normal or "#FFFFFF"
37     local color = args.color or beautiful.fg_focus or "#FFFFFF"
38
39     local myvolume = wibox.widget.textbox()
40     local myvolumeupdate = function()
41         local f = io.popen('amixer get ' .. channel)
42         local mixer = f:read("*all")
43         f:close()
44
45         local volume, mute = string.match(mixer, "([%d]+)%%.*%[([%l]*)")
46
47         if volume == nil
48         then
49             alsa.volume = 0
50         else
51             alsa.volume = volume
52         end
53
54         if mute == nil or mute == 'on'
55         then
56             alsa.mute = true
57             mute = ''
58         else
59             alsa.mute = false
60             mute = 'M'
61         end
62
63         local ret = markup(color, string.format("%d%s", volume, mute))
64         myvolume:set_markup(markup(header_color, header) .. ret .. " ")
65     end
66
67     local myvolumetimer = timer({ timeout = 5 })
68     myvolumetimer:connect_signal("timeout", myvolumeupdate)
69     myvolumetimer:start()
70     myvolumetimer:emit_signal("timeout")
71
72     myvolume:buttons(awful.util.table.join(
73         awful.button({}, 1,
74             function()
75                 run_in_terminal('alsamixer')
76              end),
77         awful.button({}, 3,
78             function()
79                 awful.util.spawn('amixer sset ' .. channel ' toggle')
80             end),
81
82         awful.button({}, 4,
83             function()
84                 awful.util.spawn('amixer sset ' .. channel .. ' ' .. step '+')
85                 myvolumeupdate()
86             end),
87
88         awful.button({}, 5,
89             function()
90                 awful.util.spawn('amixer sset ' .. channel .. ' ' .. step '-')
91                 myvolumeupdate()
92             end)
93     ))
94
95     alsa.widget = myvolume
96     alsa.channel = channel
97     alsa.step = step
98     alsa.notify = myvolumeupdate
99
100     return setmetatable(alsa, { __index = alsa.widget })
101 end
102
103 return setmetatable(alsa, { __call = function(_, ...) return worker(...) end })