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------------------------------------------
-- Author: Andrei "Garoth" Thorp --
-- Copyright 2009 Andrei "Garoth" Thorp --
------------------------------------------
local setmetatable = setmetatable
local pairs = pairs
local type = type
local widget = widget
local string = string
local awful = require("awful")
local naughty = require("naughty")
local lib = {
mpd = require("obvious.lib.mpd"),
markup = require("obvious.lib.markup"),
hooks = require("obvious.lib.hooks"),
}
module("obvious.basic_mpd")
local defaults = {
format = "$title - $album - $artist",
length = 75,
unknown = "(unknown)",
}
local settings = {}
for key, value in pairs(defaults) do
settings[key] = value
end
local widget = widget({ type = "textbox",
name = "mpd-playing",
align = "left" })
connection = lib.mpd.new()
-- Utility function to handle the text for MPD
-- @param songinfo: a table with fields "artist", "album", "title" in text
-- @return formatted (settings.format) string to display on the widget. This
-- respects settings.length and tries to make fields as close to the same
-- lenghths as possible if shortening is required.
local function format_metadata(songinfo)
format = settings.format or defaults.format
if (settings.length or defaults.length) <= 0 then
return ""
end
used_keys = {}
local start, stop
start = 1
stop = 1
while start do
local key
start, stop = string.find(format, "%$%w+", stop)
key = string.match(format, "%$(%w+)", stop)
if key then
if songinfo[key] then
used_keys[key] = songinfo[key]
else
used_keys[key] = settings.unknown or
defaults.unknown
end
end
end
retval = ""
while true do
retval = string.gsub(format, "%$(%w+)", used_keys)
if #retval > (settings.length or defaults.length) then
longest_key = nil
longest_value = ""
for key, value in pairs(used_keys) do
if #value > #longest_value then
longest_key = key
longest_value = value
end
end
if longest_key then
-- shorten the longest by 1
used_keys[longest_key] = string.sub( used_keys[longest_key],
1,
#longest_value - 1)
else
-- Seems like the format itself's too long
err = "obvious.basic_mpd: impossible to fit " ..
"output into " .. (settings.length or
defaults.length) .. " characters.\n" ..
"Widget paused."
naughty.notify({ text = err, timeout = 0 })
lib.hooks.timer.stop(update)
return ""
end
else
-- All good!
break
end
end
return awful.util.escape(retval)
end
-- Updates the widget's display
function update()
local status = connection:send("status")
local now_playing, songstats
if not status.state then
now_playing = "Music Off"
now_playing = lib.markup.fg.color("yellow", now_playing)
elseif status.state == "stop" then
now_playing = "Music Stopped"
else
songstats = connection:send("playlistid " .. status.songid)
format = settings.format or defaults.format
if type(format) == "string" then
now_playing = format_metadata(songstats)
elseif type(format) == "function" then
now_playing = format(songstats)
else
naughty.notify({ text = "obvious.basic_mpd: Invalid " ..
"display format. Widget " ..
"paused." })
lib.hooks.timer.stop(update)
end
end
widget.text = now_playing
end
update()
lib.hooks.timer.register(1, 30, update, "basic_mpd widget refresh rate")
-- SETTINGS
-- Set the format string
-- @param format The format string
function set_format(format)
settings.format = format or defaults.format
update()
end
-- Set the widget's text max length
-- @param format The max length (in characters) of the widget's text
function set_length(length)
settings.length = length or defaults.length
update()
end
-- Set the string to use for unknown metadata
-- @param format The string to use for unknown metadata
function set_unknown(unknown)
settings.unknown = unknown or defaults.unknown
update()
end
setmetatable(_M, { __call = function () return widget end })
-- vim: filetype=lua:expandtab:shiftwidth=8:tabstop=8:softtabstop=8:encoding=utf-8:textwidth=80
|
