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8331c54ef50a0346a010f7626fe1985c8abf9eb4
[etc/awesome.git] / widgets / alsabar.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 newtimer     = require("lain.helpers").newtimer
11
12 local awful        = require("awful")
13 local beautiful    = require("beautiful")
14 local naughty      = require("naughty")
15
16 local io           = { popen  = io.popen }
17 local math         = { modf   = math.modf }
18 local string       = { format = string.format, 
19                        match  = string.match,
20                        rep    = string.rep }
21 local tonumber     = tonumber
22
23 local setmetatable = setmetatable
24
25 -- ALSA volume bar
26 -- lain.widgets.alsabar
27 local alsabar =
28 {
29   channel = "Master",
30   step    = "5%",
31
32   colors =
33   {
34      background = beautiful.bg_normal,
35      mute       = "#EB8F8F",
36      unmute     = "#A4CE8A"
37   },
38
39   terminal = terminal or "xterm",
40   mixer    = terminal .. " -e alsamixer",
41
42   notifications =
43   {
44      font      = beautiful.font:sub(beautiful.font:find(""), beautiful.font:find(" ")),
45      font_size = "11",
46      color     = beautiful.fg_focus,
47      bar_size  = 18 
48   },
49
50   _current_level = 0,
51   _muted         = false
52 }
53
54 function alsabar.notify()
55   alsabar.update()
56
57         local preset =
58         {
59       title   = "",
60       text    = "",
61       timeout = 4,
62       font    = alsabar.notifications.font .. " " ..
63                 alsabar.notifications.font_size,
64       fg      = alsabar.notifications.color
65         }
66
67         if alsabar._muted
68   then
69                 preset.title = alsabar.channel .. " - Muted"
70         else
71                 preset.title = alsabar.channel .. " - " .. alsabar._current_level * 100 .. "%"
72         end
73
74   int = math.modf(alsabar._current_level * alsabar.notifications.bar_size)
75   preset.text = "["
76                 .. string.rep("|", int)
77                 .. string.rep(" ", alsabar.notifications.bar_size - int)
78                 .. "]"
79
80   if alsabar._notify ~= nil then
81                 alsabar._notify = naughty.notify ({
82         replaces_id = alsabar._notify.id,
83                           preset      = preset
84     })
85         else
86                 alsabar._notify = naughty.notify ({
87         preset = preset
88     })
89         end
90 end
91
92 local function worker(args)
93     local args = args or {}
94     local timeout = args.timeout or 4
95     local width = args.width or 63
96     local height = args.heigth or 1
97     local ticks = args.ticks or true
98     local ticks_size = args.ticks_size or 7
99     local vertical = args.vertical or false
100
101     alsabar.channel = args.channel or alsabar.channel
102     alsabar.step = args.step or alsabar.step
103     alsabar.colors = args.colors or alsabar.colors
104     alsabar.notifications = args.notifications or alsabar.notifications
105
106     alsabar.bar = awful.widget.progressbar()
107
108     alsabar.bar:set_background_color(alsabar.colors.background)
109     alsabar.bar:set_color(alsabar.colors.unmute)
110     alsabar.tooltip = awful.tooltip({ objects = { alsabar.bar } })
111     alsabar.bar:set_width(width)
112     alsabar.bar:set_height(height)
113     alsabar.bar:set_ticks(ticks)
114     alsabar.bar:set_ticks_size(ticks_size)
115
116     if vertical then alsabar.bar:set_vertical(true) end
117
118     function alsabar.update()
119         -- Get mixer control contents
120         local f = io.popen("amixer get " .. alsabar.channel)
121         local mixer = f:read("*all")
122         f:close()
123
124         -- Capture mixer control state:          [5%] ... ... [on]
125         local volu, mute = string.match(mixer, "([%d]+)%%.*%[([%l]*)") 
126
127         if volu == nil then
128             volu = 0
129             mute = "off"
130         end
131
132         alsabar._current_level = tonumber(volu) / 100
133         alsabar.bar:set_value(alsabar._current_level)
134
135         if not mute and tonumber(volu) == 0 or mute == "off"
136         then
137             alsabar._muted = true
138             alsabar.tooltip:set_text (" [Muted] ")
139             alsabar.bar:set_color(alsabar.colors.mute)
140         else
141             alsabar._muted = false
142             alsabar.tooltip:set_text(string.format(" %s:%s ", alsabar.channel, volu))
143             alsabar.bar:set_color(alsabar.colors.unmute)
144         end
145     end
146
147     newtimer("alsabar", timeout, alsabar.update)
148
149     alsabar.bar:buttons (awful.util.table.join (
150           awful.button ({}, 1, function()
151             awful.util.spawn(alsabar.mixer)
152           end),
153           awful.button ({}, 3, function()
154             awful.util.spawn(string.format("amixer set %s toggle", alsabar.channel))
155             alsabar.update()
156           end),
157           awful.button ({}, 4, function()
158             awful.util.spawn(string.format("amixer set %s %s+", alsabar.channel, alsabar.step))
159             alsabar.update()
160           end),
161           awful.button ({}, 5, function()
162             awful.util.spawn(string.format("amixer set %s %s-", alsabar.channel, alsabar.step))
163             alsabar.update()
164           end)
165     ))
166
167     return alsabar
168 end
169
170 return setmetatable(alsabar, { __call = function(_, ...) return worker(...) end })