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from asynchshell to awful.spawn.easy_async; started making every widget asynchronous
[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 focused      = require("awful.screen").focused
15 local wibox        = require("wibox")
16 local naughty      = require("naughty")
17
18 local io           = { popen  = io.popen }
19 local pairs        = pairs
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(seconds, scr)
39     fs.hide()
40
41     local cmd = (fs.options and string.format("dfs %s", fs.options)) or "dfs"
42     local ws = helpers.read_pipe(helpers.scripts_dir .. cmd):gsub("\n*$", "")
43
44     if fs.followtag then
45         fs.notification_preset.screen = focused()
46     elseif scr then
47         fs.notification_preset.screen = scr
48     end
49
50     fs_notification = naughty.notify({
51         preset  = fs.notification_preset,
52         text    = ws,
53         timeout = seconds or 5
54     })
55 end
56
57 -- Unit definitions
58 local unit = { ["mb"] = 1024, ["gb"] = 1024^2 }
59
60 local function worker(args)
61     local args             = args or {}
62     local timeout          = args.timeout or 600
63     local partition        = args.partition or "/"
64     local showpopup        = args.showpopup or "on"
65     local notify           = args.notify or "on"
66     local settings         = args.settings or function() end
67
68     fs.options             = args.options
69     fs.followtag           = args.followtag or false
70     fs.notification_preset = args.notification_preset or { fg = beautiful.fg_normal }
71
72     fs.widget = wibox.widget.textbox('')
73
74     helpers.set_map(partition, false)
75
76     function update()
77         fs_info = {}
78         fs_now  = {}
79         local f = assert(io.popen("LC_ALL=C df -kP"))
80
81         for line in f:lines() do -- Match: (size) (used)(avail)(use%) (mount)
82             local s     = string.match(line, "^.-[%s]([%d]+)")
83             local u,a,p = string.match(line, "([%d]+)[%D]+([%d]+)[%D]+([%d]+)%%")
84             local m     = string.match(line, "%%[%s]([%p%w]+)")
85
86             if u and m then -- Handle 1st line and broken regexp
87                 fs_info[m .. " size_mb"]  = string.format("%.1f", tonumber(s) / unit["mb"])
88                 fs_info[m .. " size_gb"]  = string.format("%.1f", tonumber(s) / unit["gb"])
89                 fs_info[m .. " used_mb"]  = string.format("%.1f", tonumber(u) / unit["mb"])
90                 fs_info[m .. " used_gb"]  = string.format("%.1f", tonumber(u) / unit["gb"])
91                 fs_info[m .. " used_p"]   = tonumber(p)
92                 fs_info[m .. " avail_p"]  = 100 - tonumber(p)
93             end
94         end
95
96         f:close()
97
98         fs_now.available = tonumber(fs_info[partition .. " avail_p"]) or 0
99         fs_now.size_mb   = tonumber(fs_info[partition .. " size_mb"]) or 0
100         fs_now.size_gb   = tonumber(fs_info[partition .. " size_gb"]) or 0
101         fs_now.used      = tonumber(fs_info[partition .. " used_p"])  or 0
102         fs_now.used_mb   = tonumber(fs_info[partition .. " used_mb"]) or 0
103         fs_now.used_gb   = tonumber(fs_info[partition .. " used_gb"]) or 0
104
105         notification_preset = fs.notification_preset
106         widget = fs.widget
107         settings()
108
109         if notify == "on" and fs_now.used >= 99 and not helpers.get_map(partition)
110         then
111             naughty.notify({
112                 title = "warning",
113                 text = partition .. " ran out!\nmake some room",
114                 timeout = 8,
115                 fg = "#000000",
116                 bg = "#FFFFFF",
117             })
118             helpers.set_map(partition, true)
119         else
120             helpers.set_map(partition, false)
121         end
122     end
123
124     if showpopup == "on" then
125        fs.widget:connect_signal('mouse::enter', function () fs.show(0) end)
126        fs.widget:connect_signal('mouse::leave', function () fs.hide() end)
127     end
128
129     helpers.newtimer(partition, timeout, update)
130
131     return setmetatable(fs, { __index = fs.widget })
132 end
133
134 return setmetatable(fs, { __call = function(_, ...) return worker(...) end })