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wiki updated
[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     card    = "0",
29     channel = "Master",
30     step    = "2%",
31
32     colors = {
33         background = beautiful.bg_normal,
34         mute       = "#EB8F8F",
35         unmute     = "#A4CE8A"
36     },
37
38     terminal = terminal or "xterm",
39     mixer    = terminal .. " -e alsamixer",
40
41     notifications = {
42         font      = beautiful.font:sub(beautiful.font:find(""), beautiful.font:find(" ")),
43         font_size = "11",
44         color     = beautiful.fg_normal,
45         bar_size  = 18,
46         screen    = 1
47     },
48
49     _current_level = 0,
50     _muted         = false
51 }
52
53 function alsabar.notify()
54     alsabar.update()
55
56     local preset = {
57         title   = "",
58         text    = "",
59         timeout = 4,
60         screen  = alsabar.notifications.screen,
61         font    = alsabar.notifications.font .. " " ..
62                   alsabar.notifications.font_size,
63         fg      = alsabar.notifications.color
64     }
65
66     if alsabar._muted
67     then
68         preset.title = alsabar.channel .. " - Muted"
69     else
70         preset.title = alsabar.channel .. " - " .. alsabar._current_level .. "%"
71     end
72
73     int = math.modf((alsabar._current_level / 100) * alsabar.notifications.bar_size)
74     preset.text = "["
75                 .. string.rep("|", int)
76                 .. string.rep(" ", alsabar.notifications.bar_size - int)
77                 .. "]"
78
79     if alsabar._notify ~= nil then
80         alsabar._notify = naughty.notify ({
81             replaces_id = alsabar._notify.id,
82             preset      = preset,
83         })
84     else
85         alsabar._notify = naughty.notify ({
86             preset = preset,
87         })
88     end
89 end
90
91 local function worker(args)
92     local args       = args or {}
93     local timeout    = args.timeout or 4
94     local settings   = args.settings or function() end
95     local width      = args.width or 63
96     local height     = args.heigth or 1
97     local ticks      = args.ticks or false
98     local ticks_size = args.ticks_size or 7
99     local vertical   = args.vertical or false
100
101     alsabar.cmd           = args.cmd or "amixer"
102     alsabar.channel       = args.channel or alsabar.channel
103     alsabar.step          = args.step or alsabar.step
104     alsabar.colors        = args.colors or alsabar.colors
105     alsabar.notifications = args.notifications or alsabar.notifications
106
107     alsabar.bar = awful.widget.progressbar()
108
109     alsabar.bar:set_background_color(alsabar.colors.background)
110     alsabar.bar:set_color(alsabar.colors.unmute)
111     alsabar.tooltip = awful.tooltip({ objects = { alsabar.bar } })
112     alsabar.bar:set_width(width)
113     alsabar.bar:set_height(height)
114     alsabar.bar:set_ticks(ticks)
115     alsabar.bar:set_ticks_size(ticks_size)
116     alsabar.bar:set_vertical(vertical)
117
118     function alsabar.update()
119         -- Get mixer control contents
120         local f = assert(io.popen(string.format("%s get %s", alsabar.cmd, alsabar.channel)))
121         local mixer = f:read("*a")
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)
133         alsabar.bar:set_value(alsabar._current_level / 100)
134         if not mute and tonumber(volu) == 0 or mute == "off"
135         then
136             alsabar._muted = true
137             alsabar.tooltip:set_text (" [Muted] ")
138             alsabar.bar:set_color(alsabar.colors.mute)
139         else
140             alsabar._muted = false
141             alsabar.tooltip:set_text(string.format(" %s:%s ", alsabar.channel, volu))
142             alsabar.bar:set_color(alsabar.colors.unmute)
143         end
144
145         volume_now = {}
146         volume_now.level = tonumber(volu)
147         volume_now.status = mute
148         settings()
149     end
150
151     newtimer("alsabar", timeout, alsabar.update)
152
153     alsabar.bar:buttons (awful.util.table.join (
154           awful.button ({}, 1, function()
155             awful.util.spawn(alsabar.mixer)
156           end),
157           awful.button ({}, 3, function()
158             awful.util.spawn(string.format("amixer -c %s set %s toggle", alsabar.card, alsabar.channel))
159             alsabar.update()
160           end),
161           awful.button ({}, 4, function()
162             awful.util.spawn(string.format("amixer -c %s set %s %s+", alsabar.card, alsabar.channel, alsabar.step))
163             alsabar.update()
164           end),
165           awful.button ({}, 5, function()
166             awful.util.spawn(string.format("amixer -c %s set %s %s-", alsabar.card, alsabar.channel, alsabar.step))
167             alsabar.update()
168           end)
169     ))
170
171     return alsabar
172 end
173
174 return setmetatable(alsabar, { __call = function(_, ...) return worker(...) end })