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pull #239; better implementation
[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 mouse        = mouse
20 local string       = { match  = string.match,
21                        format = string.format }
22 local tonumber     = tonumber
23
24 local setmetatable = setmetatable
25
26 -- File system disk space usage
27 -- lain.widgets.fs
28 local fs = {}
29 local fs_notification  = nil
30
31 function fs.hide()
32     if fs_notification ~= nil then
33         naughty.destroy(fs_notification)
34         fs_notification = nil
35     end
36 end
37
38 function fs.show(t_out, fs_args)
39     fs.hide()
40
41     local cmd = (fs_args and string.format("dfs %s", fs_args)) or "dfs"
42     local ws = helpers.read_pipe(helpers.scripts_dir .. cmd):gsub("\n*$", "")
43
44     if fs.followmouse then
45         fs.notification_preset.screen = mouse.screen
46     end
47
48     fs_notification = naughty.notify({
49         preset  = fs.notification_preset,
50         text    = ws,
51         timeout = t_out
52     })
53 end
54
55 -- Unit definitions
56 local unit = { ["mb"] = 1024, ["gb"] = 1024^2 }
57
58 local function worker(args)
59     local args             = args or {}
60     local timeout          = args.timeout or 600
61     local partition        = args.partition or "/"
62     local showpopup        = args.showpopup or "on"
63     local notify           = args.notify or "on"
64     local settings         = args.settings or function() end
65
66     fs.followmouse         = args.followmouse or false
67     fs.notification_preset = args.notification_preset or { fg = beautiful.fg_normal }
68
69     fs.widget = wibox.widget.textbox('')
70
71     helpers.set_map(partition, false)
72
73     function update()
74         fs_info = {}
75         fs_now  = {}
76         local f = assert(io.popen("LC_ALL=C df -kP"))
77
78         for line in f:lines() do -- Match: (size) (used)(avail)(use%) (mount)
79             local s     = string.match(line, "^.-[%s]([%d]+)")
80             local u,a,p = string.match(line, "([%d]+)[%D]+([%d]+)[%D]+([%d]+)%%")
81             local m     = string.match(line, "%%[%s]([%p%w]+)")
82
83             if u and m then -- Handle 1st line and broken regexp
84                 fs_info[m .. " size_mb"]  = string.format("%.1f", tonumber(s) / unit["mb"])
85                 fs_info[m .. " size_gb"]  = string.format("%.1f", tonumber(s) / unit["gb"])
86                 fs_info[m .. " used_p"]   = tonumber(p)
87                 fs_info[m .. " avail_p"]  = 100 - tonumber(p)
88             end
89         end
90
91         f:close()
92
93         fs_now.used      = tonumber(fs_info[partition .. " used_p"])  or 0
94         fs_now.available = tonumber(fs_info[partition .. " avail_p"]) or 0
95         fs_now.size_mb   = tonumber(fs_info[partition .. " size_mb"]) or 0
96         fs_now.size_gb   = tonumber(fs_info[partition .. " size_gb"]) or 0
97
98         notification_preset = fs.notification_preset
99         widget = fs.widget
100         settings()
101
102         if notify == "on" and fs_now.used >= 99 and not helpers.get_map(partition)
103         then
104             naughty.notify({
105                 title = "warning",
106                 text = partition .. " ran out!\nmake some room",
107                 timeout = 8,
108                 fg = "#000000",
109                 bg = "#FFFFFF",
110             })
111             helpers.set_map(partition, true)
112         else
113             helpers.set_map(partition, false)
114         end
115     end
116
117     if showpopup == "on" then
118         fs.widget:connect_signal('mouse::enter', function () fs:show(0) end)
119         fs.widget:connect_signal('mouse::leave', function () fs:hide() end)
120     end
121
122     helpers.newtimer(partition, timeout, update)
123
124     return setmetatable(fs, { __index = fs.widget })
125 end
126
127 return setmetatable(fs, { __call = function(_, ...) return worker(...) end })