47 lines
1.5 KiB
Lua
47 lines
1.5 KiB
Lua
---------------------------------------------------
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-- Licensed under the GNU General Public License v2
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-- * (c) 2010, Adrian C. <anrxc@sysphere.org>
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---------------------------------------------------
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-- {{{ Grab environment
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local type = type
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local tonumber = tonumber
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local string = { match = string.match }
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local table = { concat = table.concat }
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local helpers = require("vicious.helpers")
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local spawn = require("vicious.spawn")
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-- }}}
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-- Volume: provides volume levels and state of requested ALSA mixers
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-- vicious.widgets.volume
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local volume_linux = {}
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-- {{{ Volume widget type
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local STATE = { on = '🔉', off = '🔈' }
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local function parse(stdout, stderr, exitreason, exitcode)
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-- Capture mixer control state, e.g. [ 42 % ] [ on ]
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local volume, state = string.match(stdout, "%[([%d]+)%%%].*%[([%l]*)%]")
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-- Handle mixers without data
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if volume == nil then return {} end
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if state == "" and volume == "0" -- handle mixers without mute
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or state == "off" then -- handle muted mixers
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return { tonumber(volume), STATE.off }
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else
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return { tonumber(volume), STATE.on }
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end
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end
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function volume_linux.async(format, warg, callback)
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if not warg then return callback{} end
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if type(warg) ~= "table" then warg = { warg } end
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spawn.easy_async("amixer -M get " .. table.concat(warg, " "),
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function (...) callback(parse(...)) end)
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end
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-- }}}
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return helpers.setasyncall(volume_linux)
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