awesome/widgets/mpd_widget.lua

   1 local awful   = require("awful")
   2 local gears   = require("gears")
   3 local mpc     = require("widgets/mpc")
   4 local naughty = require("naughty")
   5 local textbox = require("wibox.widget.textbox")
   6 local timer   = require("gears.timer")
   7 local wibox   = require("wibox")
   8
   9 local widget = {}
  10 widget._textbox = textbox()
  11 widget._currentsong = {}
  12
  13 widget.scroll = wibox.widget {
  14     layout = wibox.container.scroll.horizontal,
  15     max_size = 200,
  16     extra_space = 10,
  17     step_function = wibox.container.scroll.step_functions.linear_increase,
  18     speed = 20,
  19     {
  20         widget = widget._textbox,
  21     }
  22 }
  23
  24 function widget:update_widget()
  25     local text = ""
  26     local artist = self._currentsong.artist
  27     local title = self._currentsong.title
  28     local file = self._currentsong.file
  29     if not artist then
  30         text = string.format("%s", title or file )
  31     else
  32         text = string.format("%s - %s", artist, title)
  33     end
  34     self._textbox.text = text
  35 end
  36
  37 local function sec_to_min(sec)
  38     m, s = math.modf((sec or 0.0) / 60)
  39     return string.format('%d:%02d', m, math.floor(s * 60))
  40 end
  41
  42 local function song_duration(elapsed, duration)
  43     return sec_to_min(elapsed) .. "/" .. sec_to_min(duration)
  44 end
  45
  46 function widget:get_info(callback)
  47     local status = nil
  48     self._connection:send("status", function(_, s) status = s end)
  49
  50     local song = nil
  51
  52     self._connection:send("currentsong", function(_, s)
  53         song = s
  54         self._connection:albumart(song.file, function(_, art)
  55             local info = {}
  56             if art and art.binary then
  57                 info.icon = '/tmp/test.jpg'
  58                 local f = io.open(info.icon, 'w')
  59                 f:write(art.binary)
  60                 f:close()
  61             end
  62
  63             info.title = status.state .. " " .. status.song .. "/" .. status.playlistlength .. " " .. song_duration(status.elapsed, status.duration)
  64             if not song.artist then
  65                 info.text = string.format("%s", song.title or song.file)
  66             else
  67                 info.text = string.format("%s - %s", song.artist, song.title)
  68             end
  69             if song.album then
  70                 info.text = info.text .. "\n" .. tostring(song.album or "")
  71             end
  72             callback(info)
  73         end)
  74     end)
  75 end
  76
  77 function widget:popup_show()
  78     self:get_info(function(table)
  79         if self._notification then return end
  80         self._notification = naughty.notify(
  81             { title = table.title
  82             , icon = table.icon or beautiful.mpd_default_album
  83             , icon_size = 64
  84             , text = table.text
  85             , timeout = 0
  86             , destroy = function() self._timer:stop(); self._notification = nil end
  87             })
  88         self._timer:start()
  89     end)
  90 end
  91
  92 function widget:popup_hide(delay)
  93     local function destroy()
  94         if self._hover then return end
  95         if not self._notification then return end
  96         naughty.destroy(self._notification)
  97         self._notification = nil
  98     end
  99
 100     if not delay then
 101         destroy()
 102         return
 103     end
 104
 105     if self._hide_timer and self._hide_timer.started then
 106         self._hide_timer.timeout = delay
 107         self._hide_timer:again()
 108     else
 109         self._hide_timer = timer(
 110             { timeout = delay
 111             , autostart = true
 112             , single_shot = true
 113             , callback = destroy
 114             })
 115     end
 116 end
 117
 118 function widget:popup_update()
 119     self:get_info(function(table)
 120         if not self._notification then return end
 121         naughty.replace_text(self._notification, table.title, table.text)
 122     end)
 123 end
 124
 125 function widget:popup_oneshot(timeout)
 126     if self._notification then
 127         self:popup_hide()
 128         self:popup_show()
 129     else
 130         self:popup_show()
 131     end
 132     self:popup_hide(5)
 133 end
 134
 135 function widget:error_handler(err)
 136     self._textbox:set_text("Error: " .. tostring(err))
 137     timer.start_new(10, function()
 138         self._connection:send("ping")
 139     end)
 140 end
 141
 142 function widget:run()
 143     self._connection = mpc.new(nil, nil, nil, function(err) self:error_handler(err) end,
 144         "status", function(_, result)
 145             if not self._status or result.state ~= self._status.state then
 146                 self._status = result
 147                 self:update_widget()
 148                 self:popup_oneshot(5)
 149             end
 150         end,
 151         "currentsong", function(_, result)
 152             if not self._currentsong or result.id ~= self._currentsong.id then
 153                 self._currentsong = result
 154                 self:update_widget()
 155                 self:popup_oneshot(5)
 156             end
 157         end
 158     )
 159
 160     self._timer = timer({ timeout = 1 })
 161     self._timer:connect_signal("timeout", function() self:popup_update() end)
 162
 163     self._hover = false;
 164     self.scroll:connect_signal("mouse::enter", function() self._hover = true;  self:popup_show()  end)
 165     self.scroll:connect_signal("mouse::leave", function() self._hover = false; self:popup_hide(2) end)
 166 end
 167
 168 widget:run()
 169
 170 widget.scroll:buttons(gears.table.join(
 171   awful.button({}, 1, function() widget._connection:toggle_play() end)
 172 , awful.button({}, 4, function() widget._connection:change_volume(5) end)
 173 , awful.button({}, 5, function() widget._connection:change_volume(-5) end))
 174 )
 175
 176 globalkeys = gears.table.join(globalkeys,
 177     awful.key({ modkey }, "p", function() widget._connection:toggle_play() end,
 178               { description = "toogle play", group = "mpd" }),
 179     awful.key({ modkey }, "'", function() widget:popup_oneshot(5) end,
 180               { description = "show more info", group = "mpd" }),
 181     awful.key({ modkey }, ",", function() widget._connection:send("previous") end,
 182               { description = "previous track", group = "mpd" }),
 183     awful.key({ modkey }, ".", function() widget._connection:send("next") end,
 184               { description = "next track", group = "mpd" })
 185 )
 186 return {
 187     layout = wibox.layout.align.horizontal,
 188     forced_width = 200,
 189     expand = "outside",
 190     nil,
 191     widget.scroll,
 192     nil,
 193 }