al-skel/home/.config/awesome/vicious/contrib/mpc.lua

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-- Licensed under the GNU General Public License v2
--  * (c) 2010, Adrian C. <anrxc@sysphere.org>
--  * (c) 2009, Lucas de Vries <lucas@glacicle.com>
---------------------------------------------------

-- {{{ Grab environment
local type = type
local io = { popen = io.popen }
local setmetatable = setmetatable
local string = { find = string.find }
local helpers = require("vicious.helpers")
-- }}}


-- Mpc: provides the currently playing song in MPD
-- vicious.contrib.mpc
local mpc = {}


-- {{{ MPC widget type
local function worker(format, warg)
  -- Get data from mpd
  local f = io.popen("mpc")
  local np = f:read("*line")
  f:close()

  -- Not installed,
  if np == nil or --  off         or                 stoppped.
    (string.find(np, "MPD_HOST") or string.find(np, "volume:"))
  then
    return {"Stopped"}
  end

  -- Check if we should scroll, or maybe truncate
  if warg then
    if type(warg) == "table" then
      np = helpers.scroll(np, warg[1], warg[2])
    else
      np = helpers.truncate(np, warg)
    end
  end

  return {helpers.escape(np)}
end
-- }}}

return setmetatable(mpc, { __call = function(_, ...) return worker(...) end })