dotfiles/awesome/lib/lain/widget/pulse.lua

--[[

     Licensed under GNU General Public License v2
      * (c) 2016, Luca CPZ

--]]

local helpers = require('lain.helpers')
local shell = require('awful.util').shell
local wibox = require('wibox')
local string = string
local type = type

-- PulseAudio volume
-- lain.widget.pulse

local function factory(args)
	args = args or {}

	local pulse = { widget = args.widget or wibox.widget.textbox(), device = 'N/A' }
	local timeout = args.timeout or 5
	local settings = args.settings or function() end

	pulse.devicetype = args.devicetype or 'sink'
	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'"

	function pulse.update()
		helpers.async({ shell, '-c', type(pulse.cmd) == 'string' and pulse.cmd or pulse.cmd() }, function(s)
			volume_now = {
				index = string.match(s, 'index: (%S+)') or 'N/A',
				device = string.match(s, 'device.string = "(%S+)"') or 'N/A',
				muted = string.match(s, 'muted: (%S+)') or 'N/A',
			}

			pulse.device = volume_now.index

			local ch = 1
			volume_now.channel = {}
			for v in string.gmatch(s, ':.-(%d+)%%') do
				volume_now.channel[ch] = v
				ch = ch + 1
			end

			volume_now.left = volume_now.channel[1] or 'N/A'
			volume_now.right = volume_now.channel[2] or 'N/A'

			widget = pulse.widget
			settings()
		end)
	end

	helpers.newtimer('pulse', timeout, pulse.update)

	return pulse
end

return factory