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fix #298
[etc/awesome.git] / widgets / pulseaudio.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2016, Luke Bonham                     
6                                                   
7 --]]
8
9 local helpers      = require("lain.helpers")
10 local shell        = require("awful.util").shell
11 local wibox        = require("wibox")
12 local string       = { gmatch = string.gmatch,
13                        match  = string.match,
14                        format = string.format }
15 local setmetatable = setmetatable
16
17 -- PulseAudio volume
18 -- lain.widgets.pulseaudio
19 local pulseaudio = {}
20
21 local function worker(args)
22    local args        = args or {}
23    local timeout     = args.timeout or 5
24    local settings    = args.settings or function() end
25    local scallback   = args.scallback
26
27    pulseaudio.cmd    = args.cmd or "pacmd list-sinks | sed -n -e '0,/*/d' -e '/base volume/d' -e '/volume:/p' -e '/muted:/p' -e '/device\\.string/p'"
28
29    pulseaudio.widget = wibox.widget.textbox()
30
31    function pulseaudio.update()
32       if scallback then pulseaudio.cmd = scallback() end
33
34       helpers.async({ shell, "-c", pulseaudio.cmd }, function(s)
35           volume_now = {
36               index = string.match(s, "index: (%S+)") or "N/A",
37               sink  = string.match(s, "device.string = \"(%S+)\"") or "N/A",
38               muted = string.match(s, "muted: (%S+)") or "N/A"
39           }
40
41           local ch = 1
42           volume_now.channel = {}
43           for v in string.gmatch(s, ":.-(%d+)%%") do
44               volume_now.channel[ch] = v
45               ch = ch + 1
46           end
47
48           volume_now.left  = volume_now.channel[1] or "N/A"
49           volume_now.right = volume_now.channel[2] or "N/A"
50
51           widget = pulseaudio.widget
52           settings()
53       end)
54    end
55
56    helpers.newtimer("pulseaudio", timeout, pulseaudio.update)
57
58    return pulseaudio
59 end
60
61 return setmetatable(pulseaudio, { __call = function(_, ...) return worker(...) end })