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lain.widgets -> lain.widget
[etc/awesome.git] / widget / 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.widget.pulseaudio
19
20 local function worker(args)
21     local pulseaudio = { widget = wibox.widget.textbox() }
22     local args        = args or {}
23     local devicetype  = args.devicetype or "sink"
24     local timeout     = args.timeout or 5
25     local settings    = args.settings or function() end
26     local scallback   = args.scallback
27
28     pulseaudio.cmd    = args.cmd or "pacmd list-" .. devicetype .. "s | sed -n -e '0,/*/d' -e '/base volume/d' -e '/volume:/p' -e '/muted:/p' -e '/device\\.string/p'"
29
30     function pulseaudio.update()
31         if scallback then pulseaudio.cmd = scallback() end
32
33         helpers.async({ shell, "-c", pulseaudio.cmd }, function(s)
34             volume_now = {
35                 index = string.match(s, "index: (%S+)") or "N/A",
36                 device = string.match(s, "device.string = \"(%S+)\"") or "N/A",
37                 sink   = device, -- legacy API
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
53             settings()
54         end)
55     end
56
57     helpers.newtimer("pulseaudio", timeout, pulseaudio.update)
58
59     return pulseaudio
60 end
61
62 return setmetatable({}, { __call = function(_, ...) return worker(...) end })