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     self._connection:send("currentsong", function(_, s) song = s end)
  52
  53     self._connection:send("ping", function()
  54
  55         local info = {}
  56         info.title = status.state .. " " .. status.song .. "/" .. status.playlistlength .. " " .. song_duration(status.elapsed, status.duration)
  57         if not song.artist then
  58             info.text = string.format("%s", song.title or song.file)
  59         else
  60             info.text = string.format("%s - %s", song.artist, song.title)
  61         end
  62         if song.album then
  63             info.text = info.text .. "\n" .. tostring(song.album or "")
  64         end
  65         callback(info)
  66     end)
  67 end
  68
  69 function widget:popup_show()
  70     self:get_info(function(table)
  71         if self._notification then return end
  72         self._notification = naughty.notify(
  73             { title = table.title
  74             -- , icon = img
  75             , text = table.text
  76             , timeout = 0
  77             , destroy = function() self._timer:stop() end
  78             })
  79         self._timer:start()
  80     end)
  81 end
  82
  83 function widget:popup_hide(delay)
  84     if self._hide_timer and self._hide_timer.started then
  85         self._hide_timer:again()
  86     else
  87         self._hide_timer = timer(
  88             { timeout = delay
  89             , autostart = true
  90             , single_shot = true
  91             , callback = function()
  92                 if self._hover then return end
  93                 if not self._notification then return end
  94                 naughty.destroy(self._notification)
  95                 self._notification = nil
  96                 end
  97             })
  98     end
  99 end
 100
 101 function widget:popup_update()
 102     self:get_info(function(table)
 103         if not self._notification then return end
 104         naughty.replace_text(self._notification, table.title, table.text)
 105     end)
 106 end
 107
 108 function widget:popup_oneshot(timeout)
 109     if self._notification then
 110         self:popup_update()
 111         self:popup_hide(5)
 112     else
 113         self:popup_show()
 114         self:popup_hide(5)
 115     end
 116 end
 117
 118 function widget:error_handler(err)
 119     self._textbox:set_text("Error: " .. tostring(err))
 120     timer.start_new(10, function()
 121         self._connection:send("ping")
 122     end)
 123 end
 124
 125 function widget:run()
 126     self._connection = mpc.new(nil, nil, nil, function(err) self:error_handler(err) end,
 127         "status", function(_, result)
 128             if not self._status or result.state ~= self._status.state then
 129                 self._status = result
 130                 self:update_widget()
 131                 self:popup_oneshot(5)
 132             end
 133         end,
 134         "currentsong", function(_, result)
 135             if not self._currentsong or result.id ~= self._currentsong.id then
 136                 self._currentsong = result
 137                 self:update_widget()
 138                 self:popup_oneshot(5)
 139             end
 140         end
 141     )
 142
 143     self._timer = timer({ timeout = 1 })
 144     self._timer:connect_signal("timeout", function() self:popup_update() end)
 145
 146     self._hover = false;
 147     self.scroll:connect_signal("mouse::enter", function() self._hover = true;  self:popup_show()  end)
 148     self.scroll:connect_signal("mouse::leave", function() self._hover = false; self:popup_hide(2) end)
 149 end
 150
 151 widget:run()
 152
 153 widget.scroll:buttons(gears.table.join(
 154   awful.button({}, 1, function() widget._connection:toggle_play() end)
 155 , awful.button({}, 4, function() widget._connection:change_volume(5) end)
 156 , awful.button({}, 5, function() widget._connection:change_volume(-5) end))
 157 )
 158
 159 globalkeys = gears.table.join(globalkeys,
 160     awful.key({ modkey }, "p", function() widget._connection:toggle_play() end,
 161               { description = "toogle play", group = "mpd" }),
 162     awful.key({ modkey }, "'", function() widget:popup_oneshot(5) end,
 163               { description = "show more info", group = "mpd" }),
 164     awful.key({ modkey }, ",", function() widget._connection:send("previous") end,
 165               { description = "previous track", group = "mpd" }),
 166     awful.key({ modkey }, ".", function() widget._connection:send("next") end,
 167               { description = "next track", group = "mpd" })
 168 )
 169 return {
 170     layout = wibox.layout.align.horizontal,
 171     forced_width = 200,
 172     expand = "outside",
 173     nil,
 174     widget.scroll,
 175     nil,
 176 }