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uniform timers for single-instance widgets; #114
[etc/awesome.git] / widgets / net.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2013,      Luke Bonham                
6       * (c) 2010-2012, Peter Hofmann              
7                                                   
8 --]]
9
10 local helpers      = require("lain.helpers")
11
12 local notify_fg    = require("beautiful").fg_focus
13 local naughty      = require("naughty")
14 local wibox        = require("wibox")
15
16 local io           = { popen  = io.popen }
17 local string       = { format = string.format,
18                        gsub   = string.gsub,
19                        match  = string.match }
20
21 local setmetatable = setmetatable
22
23 -- Network infos
24 -- lain.widgets.net
25 local net = {
26     last_t = 0,
27     last_r = 0
28 }
29
30 function net.get_device()
31     f = io.popen("ip link show | cut -d' ' -f2,9")
32     ws = f:read("*a")
33     f:close()
34     ws = ws:match("%w+: UP") or ws:match("ppp%w+: UNKNOWN")
35     if ws ~= nil then
36         return ws:match("(%w+):")
37     else
38         return "network off"
39     end
40 end
41
42 local function worker(args)
43     local args = args or {}
44     local timeout = args.timeout or 2
45     local units = args.units or 1024 --kb
46     local notify = args.notify or "on"
47     local screen = args.screen or 1
48     local settings = args.settings or function() end
49
50     iface = args.iface or net.get_device()
51
52     net.widget = wibox.widget.textbox('')
53
54     helpers.set_map(iface, true)
55
56     function update()
57         net_now = {}
58
59         if iface == "" or string.match(iface, "network off")
60         then
61             iface = net.get_device()
62         end
63
64         net_now.carrier = helpers.first_line('/sys/class/net/' .. iface ..
65                                            '/carrier') or "0"
66         net_now.state = helpers.first_line('/sys/class/net/' .. iface ..
67                                            '/operstate') or "down"
68         local now_t = helpers.first_line('/sys/class/net/' .. iface ..
69                                            '/statistics/tx_bytes') or 0
70         local now_r = helpers.first_line('/sys/class/net/' .. iface ..
71                                            '/statistics/rx_bytes') or 0
72
73         net_now.sent = (now_t - net.last_t) / timeout / units
74         net_now.sent = string.gsub(string.format('%.1f', net_now.sent), ",", ".")
75
76         net_now.received = (now_r - net.last_r) / timeout / units
77         net_now.received = string.gsub(string.format('%.1f', net_now.received), ",", ".")
78
79         widget = net.widget
80         settings()
81
82         net.last_t = now_t
83         net.last_r = now_r
84
85         if net_now.carrier ~= "1" and notify == "on"
86         then
87             if helpers.get_map(iface)
88             then
89                 naughty.notify({
90                     title    = iface,
91                     text     = "no carrier",
92                     timeout  = 7,
93                     position = "top_left",
94                     icon     = helpers.icons_dir .. "no_net.png",
95                     fg       = notify_fg or "#FFFFFF",
96                     screen   = screen
97                 })
98                 helpers.set_map(iface, false)
99             end
100         else
101             helpers.set_map(iface, true)
102         end
103     end
104
105     helpers.newtimer(iface, timeout, update)
106     return net.widget
107 end
108
109 return setmetatable(net, { __call = function(_, ...) return worker(...) end })