widget/pulsebar.lua

   1
   2 --[[
   3
   4      Licensed under GNU General Public License v2
   5       * (c) 2013, Luke Bonham
   6       * (c) 2013, Rman
   7
   8 --]]
   9
  10 local helpers        = require("lain.helpers")
  11 local awful          = require("awful")
  12 local naughty        = require("naughty")
  13 local wibox          = require("wibox")
  14 local math           = { modf   = math.modf }
  15 local string         = { format = string.format,
  16                          match  = string.match,
  17                          gmatch = string.gmatch,
  18                          rep    = string.rep }
  19 local type, tonumber = type, tonumber
  20
  21 -- Pulseaudio volume bar
  22 -- lain.widget.pulsebar
  23
  24 local function factory(args)
  25     local pulsebar = {
  26         colors = {
  27             background = "#000000",
  28             mute       = "#EB8F8F",
  29             unmute     = "#A4CE8A"
  30         },
  31
  32         _current_level = 0,
  33         _mute          = "no",
  34     }
  35
  36     local args       = args or {}
  37     local timeout    = args.timeout or 5
  38     local settings   = args.settings or function() end
  39     local width      = args.width or 63
  40     local height     = args.heigth or 1
  41     local ticks      = args.ticks or false
  42     local ticks_size = args.ticks_size or 7
  43     local scallback  = args.scallback
  44
  45     pulsebar.cmd                 = args.cmd or "pacmd list-sinks | sed -n -e '0,/*/d' -e '/base volume/d' -e '/volume:/p' -e '/muted:/p' -e '/device\\.string/p'"
  46     pulsebar.sink                = args.sink or 0
  47     pulsebar.colors              = args.colors or pulsebar.colors
  48     pulsebar.followtag           = args.followtag or false
  49     pulsebar.notification_preset = args.notification_preset
  50     pulsebar.device              = "N/A"
  51
  52     if not pulsebar.notification_preset then
  53         pulsebar.notification_preset      = {}
  54         pulsebar.notification_preset.font = "Monospace 10"
  55     end
  56
  57     pulsebar.bar = wibox.widget {
  58         forced_height    = height,
  59         forced_width     = width,
  60         color            = pulsebar.colors.unmute,
  61         background_color = pulsebar.colors.background,
  62         margins          = 1,
  63         paddings         = 1,
  64         ticks            = ticks,
  65         ticks_size       = ticks_size,
  66         widget           = wibox.widget.progressbar,
  67     }
  68
  69     pulsebar.tooltip = awful.tooltip({ objects = { pulsebar.bar } })
  70
  71     function pulsebar.update(callback)
  72         if scallback then pulsebar.cmd = scallback() end
  73
  74         helpers.async({ awful.util.shell, "-c", pulsebar.cmd }, function(s)
  75             volume_now = {
  76                 index = string.match(s, "index: (%S+)") or "N/A",
  77                 sink  = string.match(s, "device.string = \"(%S+)\"") or "N/A",
  78                 muted = string.match(s, "muted: (%S+)") or "N/A"
  79             }
  80
  81             pulsebar.device = volume_now.index
  82
  83             local ch = 1
  84             volume_now.channel = {}
  85             for v in string.gmatch(s, ":.-(%d+)%%") do
  86               volume_now.channel[ch] = v
  87               ch = ch + 1
  88             end
  89
  90             volume_now.left  = volume_now.channel[1] or "N/A"
  91             volume_now.right = volume_now.channel[2] or "N/A"
  92
  93             local volu = volume_now.left
  94             local mute = volume_now.muted
  95
  96             if volu:match("N/A") or mute:match("N/A") then return end
  97
  98             if volu ~= pulsebar._current_level or mute ~= pulsebar._mute then
  99                 pulsebar._current_level = tonumber(volu)
 100                 pulsebar.bar:set_value(pulsebar._current_level / 100)
 101                 if pulsebar._current_level == 0 or mute == "yes" then
 102                     pulsebar._mute = mute
 103                     pulsebar.tooltip:set_text ("[Muted]")
 104                     pulsebar.bar.color = pulsebar.colors.mute
 105                 else
 106                     pulsebar._mute = "no"
 107                     pulsebar.tooltip:set_text(string.format("%s: %s", pulsebar.sink, volu))
 108                     pulsebar.bar.color = pulsebar.colors.unmute
 109                 end
 110
 111                 settings()
 112
 113                 if type(callback) == "function" then callback() end
 114             end
 115         end)
 116     end
 117
 118     function pulsebar.notify()
 119         pulsebar.update(function()
 120             local preset = pulsebar.notification_preset
 121
 122             if pulsebar._mute == "yes" then
 123                 preset.title = string.format("Sink %s - Muted", pulsebar.sink)
 124             else
 125                 preset.title = string.format("Sink %s - %s%%", pulsebar.sink, pulsebar._current_level)
 126             end
 127
 128             int = math.modf((pulsebar._current_level / 100) * awful.screen.focused().mywibox.height)
 129             preset.text = string.format("[%s%s]", string.rep("|", int),
 130                           string.rep(" ", awful.screen.focused().mywibox.height - int))
 131
 132             if pulsebar.followtag then preset.screen = awful.screen.focused() end
 133
 134             if not pulsebar.notification then
 135                 pulsebar.notification = naughty.notify {
 136                     preset  = preset,
 137                     destroy = function() pulsebar.notification = nil end
 138                 }
 139             else
 140                 naughty.replace_text(pulsebar.notification, preset.title, preset.text)
 141             end
 142         end)
 143     end
 144
 145     helpers.newtimer(string.format("pulsebar-%s", pulsebar.sink), timeout, pulsebar.update)
 146
 147     return pulsebar
 148 end
 149
 150 return factory