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wiki updated
[etc/awesome.git] / widget / pulsebar.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                          gmatch = string.gmatch,
17                          rep    = string.rep }
18 local type, tonumber = type, tonumber
19
20 -- PulseAudio volume bar
21 -- lain.widget.pulsebar
22
23 local function factory(args)
24     local pulsebar = {
25         colors = {
26             background = "#000000",
27             mute       = "#EB8F8F",
28             unmute     = "#A4CE8A"
29         },
30
31         _current_level = 0,
32         _mute          = "no",
33         device         = "N/A"
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
44     pulsebar.colors              = args.colors or pulsebar.colors
45     pulsebar.followtag           = args.followtag or false
46     pulsebar.notification_preset = args.notification_preset
47     pulsebar.devicetype          = args.devicetype or "sink"
48     pulsebar.cmd                 = args.cmd or "pacmd list-" .. pulsebar.devicetype .. "s | sed -n -e '/*/,$!d' -e '/index/p' -e '/base volume/d' -e '/volume:/p' -e '/muted:/p' -e '/device\\.string/p'"
49
50     if not pulsebar.notification_preset then
51         pulsebar.notification_preset = {
52             font = "Monospace 10"
53         }
54     end
55
56     pulsebar.bar = wibox.widget {
57         forced_height    = height,
58         forced_width     = width,
59         color            = pulsebar.colors.unmute,
60         background_color = pulsebar.colors.background,
61         margins          = 1,
62         paddings         = 1,
63         ticks            = ticks,
64         ticks_size       = ticks_size,
65         widget           = wibox.widget.progressbar,
66     }
67
68     pulsebar.tooltip = awful.tooltip({ objects = { pulsebar.bar } })
69
70     function pulsebar.update(callback)
71         helpers.async({ awful.util.shell, "-c", type(pulsebar.cmd) == "string" and pulsebar.cmd or pulsebar.cmd() },
72         function(s)
73             volume_now = {
74                 index  = string.match(s, "index: (%S+)") or "N/A",
75                 device = string.match(s, "device.string = \"(%S+)\"") or "N/A",
76                 muted  = string.match(s, "muted: (%S+)") or "N/A"
77             }
78
79             pulsebar.device = volume_now.index
80
81             local ch = 1
82             volume_now.channel = {}
83             for v in string.gmatch(s, ":.-(%d+)%%") do
84               volume_now.channel[ch] = v
85               ch = ch + 1
86             end
87
88             volume_now.left  = volume_now.channel[1] or "N/A"
89             volume_now.right = volume_now.channel[2] or "N/A"
90
91             local volu = volume_now.left
92             local mute = volume_now.muted
93
94             if volu:match("N/A") or mute:match("N/A") then return end
95
96             if volu ~= pulsebar._current_level or mute ~= pulsebar._mute then
97                 pulsebar._current_level = tonumber(volu)
98                 pulsebar.bar:set_value(pulsebar._current_level / 100)
99                 if pulsebar._current_level == 0 or mute == "yes" then
100                     pulsebar._mute = mute
101                     pulsebar.tooltip:set_text ("[muted]")
102                     pulsebar.bar.color = pulsebar.colors.mute
103                 else
104                     pulsebar._mute = "no"
105                     pulsebar.tooltip:set_text(string.format("%s %s: %s", pulsebar.devicetype, pulsebar.device, volu))
106                     pulsebar.bar.color = pulsebar.colors.unmute
107                 end
108
109                 settings()
110
111                 if type(callback) == "function" then callback() end
112             end
113         end)
114     end
115
116     function pulsebar.notify()
117         pulsebar.update(function()
118             local preset = pulsebar.notification_preset
119
120             preset.title = string.format("%s %s - %s%%", pulsebar.devicetype, pulsebar.device, pulsebar._current_level)
121
122             if pulsebar._mute == "yes" then
123                 preset.title = preset.title .. " muted"
124             end
125
126             -- tot is the maximum number of ticks to display in the notification
127             -- fallback: default horizontal wibox height
128             local wib, tot = awful.screen.focused().mywibox, 20
129
130             -- if we can grab mywibox, tot is defined as its height if
131             -- horizontal, or width otherwise
132             if wib then
133                 if wib.position == "left" or wib.position == "right" then
134                     tot = wib.width
135                 else
136                     tot = wib.height
137                 end
138             end
139
140             int = math.modf((pulsebar._current_level / 100) * tot)
141             preset.text = string.format("[%s%s]", string.rep("|", int),
142                           string.rep(" ", tot - int))
143
144             if pulsebar.followtag then preset.screen = awful.screen.focused() end
145
146             if not pulsebar.notification then
147                 pulsebar.notification = naughty.notify {
148                     preset  = preset,
149                     destroy = function() pulsebar.notification = nil end
150                 }
151             else
152                 naughty.replace_text(pulsebar.notification, preset.title, preset.text)
153             end
154         end)
155     end
156
157     helpers.newtimer(string.format("pulsebar-%s", pulsebar.sink), timeout, pulsebar.update)
158
159     return pulsebar
160 end
161
162 return factory