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widget module loads optimization
[etc/awesome.git] / widgets / fs.lua
1
2 --[[
3                                                       
4      Licensed under GNU General Public License v2     
5       * (c) 2013, Luke Bonham                         
6       * (c) 2010, Adrian C.      <anrxc@sysphere.org> 
7       * (c) 2009, Lucas de Vries <lucas@glacicle.com> 
8                                                       
9 --]]
10
11 local helpers      = require("lain.helpers")
12
13 local beautiful    = require("beautiful")
14 local wibox        = require("wibox")
15 local naughty      = require("naughty")
16
17 local io           = { popen  = io.popen }
18 local pairs        = pairs
19 local string       = { match  = string.match,
20                        format = string.format }
21 local tonumber     = tonumber
22
23 local setmetatable = setmetatable
24
25 -- File system disk space usage
26 -- lain.widgets.fs
27 local fs = {}
28
29 local notification  = nil
30 fs_notification_preset = { fg = beautiful.fg_normal }
31
32 function fs:hide()
33     if notification ~= nil then
34         naughty.destroy(notification)
35         notification = nil
36     end
37 end
38
39 function fs:show(t_out)
40     fs:hide()
41
42     local f = io.popen(helpers.scripts_dir .. "dfs")
43     ws = f:read("*a"):gsub("\n*$", "")
44     f:close()
45
46     notification = naughty.notify({
47         preset = fs_notification_preset,
48         text = ws,
49         timeout = t_out,
50         screen = client.focus and client.focus.screen or 1
51     })
52 end
53
54 -- Unit definitions
55 local unit = { ["mb"] = 1024, ["gb"] = 1024^2 }
56
57 local function worker(args)
58     local args      = args or {}
59     local timeout   = args.timeout or 600
60     local partition = args.partition or "/"
61     local settings  = args.settings or function() end
62
63     fs.widget = wibox.widget.textbox('')
64
65     helpers.set_map("fs", false)
66
67     function update()
68         fs_info = {}
69         fs_now  = {}
70         local f = io.popen("LC_ALL=C df -kP " .. partition)
71
72         for line in f:lines() do -- Match: (size) (used)(avail)(use%) (mount)
73             local s     = string.match(line, "^.-[%s]([%d]+)")
74             local u,a,p = string.match(line, "([%d]+)[%D]+([%d]+)[%D]+([%d]+)%%")
75             local m     = string.match(line, "%%[%s]([%p%w]+)")
76
77             if u and m then -- Handle 1st line and broken regexp
78                 fs_info[m .. " size_mb"]  = string.format("%.1f", tonumber(s) / unit["mb"])
79                 fs_info[m .. " size_gb"]  = string.format("%.1f", tonumber(s) / unit["gb"])
80                 fs_info[m .. " used_p"]   = tonumber(p)
81                 fs_info[m .. " avail_p"]  = 100 - tonumber(p)
82             end
83         end
84
85         f:close()
86
87         fs_now.used      = tonumber(fs_info[partition .. " used_p"])  or 0
88         fs_now.available = tonumber(fs_info[partition .. " avail_p"]) or 0
89         fs_now.size_mb   = tonumber(fs_info[partition .. " size_mb"]) or 0
90         fs_now.size_gb   = tonumber(fs_info[partition .. " size_gb"]) or 0
91
92         widget = fs.widget
93         settings()
94
95         if fs_now.used >= 99 and not helpers.get_map("fs")
96         then
97             naughty.notify({
98                 title = "warning",
99                 text = partition .. " ran out!\nmake some room",
100                 timeout = 8,
101                 fg = "#000000",
102                 bg = "#FFFFFF",
103                 screen = client.focus and client.focus.screen or 1
104             })
105             helpers.set_map("fs", true)
106         else
107             helpers.set_map("fs", false)
108         end
109     end
110
111     helpers.newtimer(partition, timeout, update)
112
113     widget:connect_signal('mouse::enter', function () fs:show(0) end)
114     widget:connect_signal('mouse::leave', function () fs:hide() end)
115
116     return setmetatable(fs, { __index = fs.widget })
117 end
118
119 return setmetatable(fs, { __call = function(_, ...) return worker(...) end })