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Fixed another 1 pixel discrepancy
[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 string       = { format = string.format,
17                        gsub   = string.gsub,
18                        match  = string.match }
19
20 local setmetatable = setmetatable
21
22 -- Network infos
23 -- lain.widgets.net
24 local net = {
25     last_t = 0,
26     last_r = 0
27 }
28
29 function net.get_device()
30     local ws = helpers.read_pipe("ip link show | cut -d' ' -f2,9")
31     ws = ws:match("%w+: UP") or ws:match("ppp%w+: UNKNOWN")
32     if ws ~= nil then
33         return ws:match("(%w+):")
34     else
35         return "network off"
36     end
37 end
38
39 local function worker(args)
40     local args = args or {}
41     local timeout = args.timeout or 2
42     local units = args.units or 1024 --kb
43     local notify = args.notify or "on"
44     local screen = args.screen or 1
45     local settings = args.settings or function() end
46
47     iface = args.iface or net.get_device()
48
49     net.widget = wibox.widget.textbox('')
50
51     helpers.set_map(iface, true)
52
53     function update()
54         net_now = {}
55
56         if iface == "" or string.match(iface, "network off")
57         then
58             iface = net.get_device()
59         end
60
61         net_now.carrier = helpers.first_line('/sys/class/net/' .. iface ..
62                                            '/carrier') or "0"
63         net_now.state = helpers.first_line('/sys/class/net/' .. iface ..
64                                            '/operstate') or "down"
65         local now_t = helpers.first_line('/sys/class/net/' .. iface ..
66                                            '/statistics/tx_bytes') or 0
67         local now_r = helpers.first_line('/sys/class/net/' .. iface ..
68                                            '/statistics/rx_bytes') or 0
69
70         net_now.sent = (now_t - net.last_t) / timeout / units
71         net_now.sent = string.gsub(string.format('%.1f', net_now.sent), ",", ".")
72
73         net_now.received = (now_r - net.last_r) / timeout / units
74         net_now.received = string.gsub(string.format('%.1f', net_now.received), ",", ".")
75
76         widget = net.widget
77         settings()
78
79         net.last_t = now_t
80         net.last_r = now_r
81
82         if net_now.carrier ~= "1" and notify == "on"
83         then
84             if helpers.get_map(iface)
85             then
86                 naughty.notify({
87                     title    = iface,
88                     text     = "no carrier",
89                     timeout  = 7,
90                     position = "top_left",
91                     icon     = helpers.icons_dir .. "no_net.png",
92                     fg       = notify_fg or "#FFFFFF",
93                     screen   = screen
94                 })
95                 helpers.set_map(iface, false)
96             end
97         else
98             helpers.set_map(iface, true)
99         end
100     end
101
102     helpers.newtimer(iface, timeout, update)
103     return net.widget
104 end
105
106 return setmetatable(net, { __call = function(_, ...) return worker(...) end })