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path: root/widgets/volume.lua
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-- Inspired by https://awesome.naquadah.org/wiki/Farhavens_volume_widget

local setmetatable = setmetatable
local io = io
local string = string
local tonumber = tonumber
local capi = { widget = widget }
local awful = require('awful')
local wibox = require('wibox')
local beautiful = require('beautiful')

module('widgets.volume')

local cardid = nil
local channel = 'Master'

-- command must start with a space!
local function mixercommand(w, command)
	local cmd = 'amixer'
	if cardid then
		cmd = cmd .. ' -c ' .. cardid
	end
	local fd = io.popen(cmd .. command)
	local status = fd:read('*all')
	fd:close()
	if status == '' then
		w.visible = false
	else
		local p = w:get_children_by_id('p')[1]
		local volume = string.match(status, '(%d?%d?%d)%%')
		status = string.match(status, '%[(o[^%]]*)%]')
		p.value = tonumber(volume)
		if string.find(status, 'on', 1, true) then
			p.border_color = beautiful.fg_normal
		else
			p.border_color = beautiful.bg_normal
		end
	end
end

local function update(w)
	mixercommand(w, ' sget ' .. channel)
end
local function up(w)
	mixercommand(w, ' sset ' .. channel .. ' 10%+')
end
local function down(w)
	mixercommand(w, ' sset ' .. channel .. ' 10%-')
end
local function toggle(w)
	mixercommand(w, ' sset ' .. channel .. ' toggle')
end

local function new(args)
	local args = args or {}
	local w = wibox.widget{
            {
                image = beautiful.widget_vol,
                widget = wibox.widget.imagebox,
            },
            {
                {
                    id = 'p',
                    forced_height = args.width or 8,
                    forced_width = args.height or beautiful.wibox_height or 16,
                    border_width = 1,
                    color = beautiful.fg_normal,
                    background_color = beautiful.bg_normal,
                    value = 10,
                    max_value = 100,
                    widget = wibox.widget.progressbar,
                },
                direction = 'east',
                layout = wibox.container.rotate,
            },
            layout = wibox.layout.fixed.horizontal,
        }
	w:buttons(awful.util.table.join(
		awful.button({}, 1, nil, function () toggle(w) end),
		awful.button({}, 4, nil, function () up(w) end),
		awful.button({}, 5, nil, function () down(w) end)
	))
	update(w)
	return w
end

setmetatable(_M, { __call = function(_, ...) return new(...) end })