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-- volume widget type for GNU/Linux
-- Copyright (C) 2010 Adrian C. <anrxc@sysphere.org>
-- Copyright (C) 2017 Brandon Hartshorn <brandonhartshorn@gmail.com>
-- Copyright (C) 2017 mutlusun <mutlusun@github.com>
-- Copyright (C) 2019 Nguyễn Gia Phong <vn.mcsinyx@gmail.com>
--
-- This file is part of Vicious.
--
-- Vicious is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as
-- published by the Free Software Foundation, either version 2 of the
-- License, or (at your option) any later version.
--
-- Vicious is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with Vicious. If not, see <https://www.gnu.org/licenses/>.
-- {{{ Grab environment
local type = type
local tonumber = tonumber
local string = { match = string.match }
local table = { concat = table.concat }
local helpers = require("vicious.helpers")
local spawn = require("vicious.spawn")
-- }}}
-- Volume: provides volume levels and state of requested ALSA mixers
-- vicious.widgets.volume
local volume_linux = {}
-- {{{ Volume widget type
local STATE = { on = '🔉', off = '🔈' }
local function parse(stdout, stderr, exitreason, exitcode)
-- Capture mixer control state, e.g. [ 42 % ] [ on ]
local volume, state = string.match(stdout, "%[([%d]+)%%%].*%[([%l]*)%]")
-- Handle mixers without data
if volume == nil then return {} end
if state == "" and volume == "0" -- handle mixers without mute
or state == "off" then -- handle muted mixers
return { tonumber(volume), STATE.off }
else
return { tonumber(volume), STATE.on }
end
end
function volume_linux.async(format, warg, callback)
if not warg then return callback{} end
if type(warg) ~= "table" then warg = { warg } end
spawn.easy_async("amixer -M get " .. table.concat(warg, " "),
function (...) callback(parse(...)) end)
end
-- }}}
return helpers.setasyncall(volume_linux)
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