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