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{alsa,pulse}bar: fallback for mywibox variable; closes #384
[etc/awesome.git] / widget / alsabar.lua
1 --[[
2
3      Licensed under GNU General Public License v2
4       * (c) 2013, Luca CPZ
5       * (c) 2013, Rman
6
7 --]]
8
9 local helpers        = require("lain.helpers")
10 local awful          = require("awful")
11 local naughty        = require("naughty")
12 local wibox          = require("wibox")
13 local math           = { modf   = math.modf }
14 local string         = { format = string.format,
15                          match  = string.match,
16                          rep    = string.rep }
17 local type, tonumber = type, tonumber
18
19 -- ALSA volume bar
20 -- lain.widget.alsabar
21
22 local function factory(args)
23     local alsabar = {
24         colors = {
25             background = "#000000",
26             mute       = "#EB8F8F",
27             unmute     = "#A4CE8A"
28         },
29
30         _current_level = 0,
31         _playback      = "off"
32     }
33
34     local args       = args or {}
35     local timeout    = args.timeout or 5
36     local settings   = args.settings or function() end
37     local width      = args.width or 63
38     local height     = args.height or 1
39     local ticks      = args.ticks or false
40     local ticks_size = args.ticks_size or 7
41
42     alsabar.cmd                 = args.cmd or "amixer"
43     alsabar.channel             = args.channel or "Master"
44     alsabar.togglechannel       = args.togglechannel
45     alsabar.colors              = args.colors or alsabar.colors
46     alsabar.followtag           = args.followtag or false
47     alsabar.notification_preset = args.notification_preset
48
49     if not alsabar.notification_preset then
50         alsabar.notification_preset      = {}
51         alsabar.notification_preset.font = "Monospace 10"
52     end
53
54     local format_cmd = string.format("%s get %s", alsabar.cmd, alsabar.channel)
55
56     if alsabar.togglechannel then
57         format_cmd = { awful.util.shell, "-c", string.format("%s get %s; %s get %s",
58         alsabar.cmd, alsabar.channel, alsabar.cmd, alsabar.togglechannel) }
59     end
60
61     alsabar.bar = wibox.widget {
62         forced_height    = height,
63         forced_width     = width,
64         color            = alsabar.colors.unmute,
65         background_color = alsabar.colors.background,
66         margins          = 1,
67         paddings         = 1,
68         ticks            = ticks,
69         ticks_size       = ticks_size,
70         widget           = wibox.widget.progressbar
71     }
72
73     alsabar.tooltip = awful.tooltip({ objects = { alsabar.bar } })
74
75     function alsabar.update(callback)
76         helpers.async(format_cmd, function(mixer)
77             local vol, playback = string.match(mixer, "([%d]+)%%.*%[([%l]*)")
78
79             if not vol or not playback then return end
80
81             if vol ~= alsabar._current_level or playback ~= alsabar._playback then
82                 alsabar._current_level = tonumber(vol)
83                 alsabar.bar:set_value(alsabar._current_level / 100)
84                 if alsabar._current_level == 0 or playback == "off" then
85                     alsabar._playback = playback
86                     alsabar.tooltip:set_text("[Muted]")
87                     alsabar.bar.color = alsabar.colors.mute
88                 else
89                     alsabar._playback = "on"
90                     alsabar.tooltip:set_text(string.format("%s: %s", alsabar.channel, vol))
91                     alsabar.bar.color = alsabar.colors.unmute
92                 end
93
94                 volume_now = {
95                     level  = alsabar._current_level,
96                     status = alsabar._playback
97                 }
98
99                 settings()
100
101                 if type(callback) == "function" then callback() end
102             end
103         end)
104     end
105
106     function alsabar.notify()
107         alsabar.update(function()
108             local preset = alsabar.notification_preset
109
110             preset.title = string.format("%s - %s%%", alsabar.channel, alsabar._current_level)
111
112             if alsabar._playback == "off" then
113                 preset.title = preset.title .. " Muted"
114             end
115
116             -- tot is the maximum number of ticks to display in the notification
117             -- fallback: default horizontal wibox height
118             local wib, tot = awful.screen.focused().mywibox, 20
119
120             -- if we can grab mywibox, tot is defined as its height if
121             -- horizontal, or width otherwise
122             if wib then
123                 if wib.position == "left" or wib.position == "right" then
124                     tot = wib.width
125                 else
126                     tot = wib.height
127                 end
128             end
129
130             int = math.modf((alsabar._current_level / 100) * tot)
131             preset.text = string.format("[%s%s]", string.rep("|", int),
132                           string.rep(" ", tot - int))
133
134             if alsabar.followtag then preset.screen = awful.screen.focused() end
135
136             if not alsabar.notification then
137                 alsabar.notification = naughty.notify {
138                     preset  = preset,
139                     destroy = function() alsabar.notification = nil end
140                 }
141             else
142                 naughty.replace_text(alsabar.notification, preset.title, preset.text)
143             end
144         end)
145     end
146
147     helpers.newtimer(string.format("alsabar-%s-%s", alsabar.cmd, alsabar.channel), timeout, alsabar.update)
148
149     return alsabar
150 end
151
152 return factory