awesome/widgets/mpd_widget.lua

   1 local mpc = require("widgets/mpc")
   2 local textbox = require("wibox.widget.textbox")
   3 local gears = require("gears")
   4 local awful = require("awful")
   5 local naughty = require("naughty")
   6 local timer = require("gears.timer")
   7 local wibox = require("wibox")
   8
   9 --TODO remove
  10 local dbg = require("gears.debug")
  11
  12 local widget = {}
  13 widget._textbox = textbox()
  14 widget._currentsong = {}
  15
  16 widget.scroll = wibox.widget {
  17     layout = wibox.container.scroll.horizontal,
  18     max_size = 200,
  19     step_function = wibox.container.scroll.step_functions.linear_increase,
  20     speed = 20,
  21     {
  22         widget = widget._textbox,
  23     }
  24 }
  25
  26 function widget:update_widget()
  27     local text = ""
  28     local artist = self._currentsong.artist
  29     local title = self._currentsong.title
  30     local file = self._currentsong.file
  31     text = text .. tostring(artist or "") .. " - " .. tostring(title or "")
  32     if not artist then
  33         text = string.format("%s", title or file )
  34     else
  35         text = string.format("%s - %s", artist, title)
  36     end
  37     self._textbox.text = text
  38 end
  39
  40 local function sec_to_min(sec)
  41     m, s = math.modf((sec or 0.0) / 60)
  42     return string.format('%d:%02d', m, math.floor(s * 60))
  43 end
  44
  45 local function song_duration(elapsed, duration)
  46     return sec_to_min(elapsed) .. "/" .. sec_to_min(duration)
  47 end
  48
  49 function widget:get_info(callback)
  50     local status = nil
  51     self._connection:send("status", function(_, s) status = s end)
  52
  53     local song = nil
  54     self._connection:send("currentsong", function(_, s) song = s end)
  55
  56     self._connection:send("ping", function()
  57
  58         local info = {}
  59         info.title = status.state .. " " .. status.song .. "/" .. status.playlistlength .. " " .. song_duration(status.elapsed, status.duration)
  60         info.text = tostring(song.artist or "") .. " - " .. tostring(song.title or "") .. "\n"
  61             .. tostring(song.album or "")
  62         callback(info)
  63         return false
  64     end)
  65 end
  66
  67 function widget:popup_show()
  68     self:get_info(function(table)
  69         if self._notification then return end
  70         self._notification = naughty.notify(
  71             { title = table.title
  72             -- , icon = img
  73             , text = table.text
  74             , timeout = 0
  75             , destroy = function() self._timer:stop() end
  76             })
  77         self._timer:start()
  78     end)
  79 end
  80
  81 function widget:popup_hide(delay)
  82     if self._hide_timer and self._hide_timer.started then
  83         self._hide_timer:again()
  84     else
  85         self._hide_timer = timer(
  86             { timeout = delay
  87             , autostart = true
  88             , single_shot = true
  89             , callback = function()
  90                 if self._hover then return end
  91                 if not self._notification then return end
  92                 naughty.destroy(self._notification)
  93                 self._notification = nil
  94                 end
  95             })
  96     end
  97 end
  98
  99 function widget:popup_update()
 100     self:get_info(function(table)
 101         if not self._notification then return end
 102         naughty.replace_text(self._notification, table.title, table.text)
 103     end)
 104 end
 105
 106 function widget:popup_oneshot(timeout)
 107     if self._notification then
 108         self:popup_update()
 109         self:popup_hide(5)
 110     else
 111         self:popup_show()
 112         self:popup_hide(5)
 113     end
 114 end
 115
 116 function widget:error_handler(err)
 117     self._textbox:set_text("Error: " .. tostring(err))
 118     timer.start_new(10, function()
 119         self._connection:send("ping")
 120     end)
 121 end
 122
 123 function widget:run()
 124     self._connection = mpc.new(nil, nil, nil, function(err) self:error_handler(err) end,
 125         "status", function(_, result)
 126             if not self._status or result.state ~= self._status.state then
 127                 self._status = result
 128                 self:update_widget()
 129                 self:popup_oneshot(5)
 130             end
 131         end,
 132         "currentsong", function(_, result)
 133             if not self._currentsong or result.id ~= self._currentsong.id then
 134                 self._currentsong = result
 135                 self:update_widget()
 136                 self:popup_oneshot(5)
 137             end
 138         end
 139     )
 140
 141     self._timer = timer({ timeout = 1 })
 142     self._timer:connect_signal("timeout", function() self:popup_update() end)
 143
 144     self._hover = false;
 145     self.scroll:connect_signal("mouse::enter", function() self._hover = true;  self:popup_show()  end)
 146     self.scroll:connect_signal("mouse::leave", function() self._hover = false; self:popup_hide(2) end)
 147 end
 148
 149 widget:run()
 150
 151 widget.scroll:buttons(gears.table.join(
 152   awful.button({}, 1, function() widget._connection:toggle_play() end)
 153 , awful.button({}, 4, function() widget._connection:change_volume(5) end)
 154 , awful.button({}, 5, function() widget._connection:change_volume(-5) end))
 155 )
 156
 157 globalkeys = gears.table.join(globalkeys,
 158     awful.key({ modkey }, "p", function() widget._connection:toggle_play() end,
 159               { description = "toogle play", group = "mpd" }),
 160     awful.key({ modkey }, "'", function() widget:popup_oneshot(5) end,
 161               { description = "show more info", group = "mpd" }),
 162     awful.key({ modkey }, ",", function() widget._connection:send("previous") end,
 163               { description = "previous track", group = "mpd" }),
 164     awful.key({ modkey }, ".", function() widget._connection:send("next") end,
 165               { description = "next track", group = "mpd" })
 166 )
 167 return {
 168     layout = wibox.layout.align.horizontal,
 169     forced_width = 200,
 170     expand = "outside",
 171     nil,
 172     widget.scroll,
 173     nil,
 174 }