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c62acd1be2bd3975e9de52537c65d75af8e097c4
[etc/awesome.git] / widget / contrib / tpbat / init.lua
1 --[[
2
3      tpbat.lua
4      Battery status widget for ThinkPad laptops that use SMAPI
5      lain.widget.contrib.tpbat
6
7      More on tp_smapi: http://www.thinkwiki.org/wiki/Tp_smapi
8
9      Licensed under GNU General Public License v2
10       * (c) 2013,      Conor Heine
11       * (c) 2013,      Luca CPZ
12       * (c) 2010-2012, Peter Hofmann
13
14 --]]
15
16 local debug        = { getinfo = debug.getinfo }
17 local newtimer     = require("lain.helpers").newtimer
18 local first_line   = require("lain.helpers").first_line
19 local naughty      = require("naughty")
20 local wibox        = require("wibox")
21 local string       = { format = string.format }
22 local math         = { floor = math.floor }
23 local tostring     = tostring
24 local setmetatable = setmetatable
25 package.path       = debug.getinfo(1,"S").source:match[[^@?(.*[\/])[^\/]-$]] .. "?.lua;" .. package.path
26 local smapi        = require("smapi")
27
28 -- ThinkPad SMAPI-enabled battery info widget
29 -- lain.widget.contrib.tpbat
30 local tpbat = {}
31
32 function tpbat.hide()
33     if not tpbat.notification then return end
34     naughty.destroy(tpbat.notification)
35     tpbat.notification = nil
36 end
37
38 function tpbat.show(t_out)
39     tpbat.hide()
40
41     local bat = tpbat.bat
42
43     if bat == nil or not bat:installed() then return end
44
45     local t_out = t_out or 0
46     local mfgr   = bat:get('manufacturer') or "no_mfgr"
47     local model  = bat:get('model') or "no_model"
48     local chem   = bat:get('chemistry') or "no_chem"
49     local status = bat:get('state') or "nil"
50     local time   = bat:remaining_time()
51     local msg    = "\t"
52
53     if status ~= "idle" and status ~= "nil" then
54         if time == "N/A" then
55             msg = "...Calculating time remaining..."
56         else
57             msg = time .. (status == "charging" and " until charged" or " remaining")
58         end
59     else
60         msg = "On AC Power"
61     end
62
63     local str = string.format("%s : %s %s (%s)\n", bat.name, mfgr, model, chem)
64                 .. string.format("\n%s \t\t\t %s", status:upper(), msg)
65
66     tpbat.notification = naughty.notify({
67         text    = str,
68         timeout = t_out,
69         screen  = client.focus and client.focus.screen or 1
70     })
71 end
72
73 function tpbat.register(args)
74     local args = args or {}
75     local timeout = args.timeout or 30
76     local battery = args.battery or "BAT0"
77     local bat_low_perc = args.bat_low_perc or 15
78     local bat_critical_perc = args.bat_critical_perc or 5
79     local settings = args.settings or function() end
80
81     tpbat.bat = smapi:battery(battery) -- Create a new battery
82     local bat = tpbat.bat
83
84     tpbat.widget = wibox.widget.textbox()
85
86     bat_notification_low_preset = {
87         title = "Battery low",
88         text = "Plug the cable!",
89         timeout = 15,
90         fg = "#202020",
91         bg = "#CDCDCD"
92     }
93
94     bat_notification_critical_preset = {
95         title = "Battery exhausted",
96         text = "Shutdown imminent",
97         timeout = 15,
98         fg = "#000000",
99         bg = "#FFFFFF"
100     }
101
102     if bat:get('state') == nil
103     then
104         local n = naughty.notify({
105             preset = bat_notification_low_preset,
106             title = "SMAPI Battery Warning: Unable to read battery state!",
107             text = "This widget is intended for ThinkPads. Is tp_smapi installed? Check your configs & paths.",
108             screen = client.focus and client.focus.screen or 1
109         })
110     end
111
112     function tpbat.update()
113         bat_now = {
114             status = "Not present",
115             perc   = "N/A",
116             time   = "N/A",
117             watt   = "N/A"
118         }
119
120         if bat:installed()
121         then
122             bat_now.status = bat:status() or "N/A"
123             bat_now.perc   = bat:percent()
124             bat_now.time   = bat:remaining_time()
125             -- bat_now.watt = string.format("%.2fW", (VOLTS * AMPS) / 1e12)
126
127             -- notifications for low and critical states (when discharging)
128             if bat_now.status == "discharging"
129             then
130                 if bat_now.perc <= bat_critical_perc
131                 then
132                     tpbat.id = naughty.notify({
133                         preset = bat_notification_critical_preset,
134                         replaces_id = tpbat.id,
135                         screen = client.focus and client.focus.screen or 1
136                     }).id
137                 elseif bat_now.perc <= bat_low_perc
138                 then
139                     tpbat.id = naughty.notify({
140                         preset = bat_notification_low_preset,
141                         replaces_id = tpbat.id,
142                         screen = client.focus and client.focus.screen or 1
143                     }).id
144                 end
145             end
146
147             bat_now.perc = tostring(bat_now.perc)
148         end
149
150         widget = tpbat.widget
151
152         settings()
153     end
154
155     newtimer("tpbat-" .. bat.name, timeout, tpbat.update)
156
157     widget:connect_signal('mouse::enter', function () tpbat.show() end)
158     widget:connect_signal('mouse::leave', function () tpbat.hide() end)
159
160     return tpbat
161 end
162
163 return setmetatable(tpbat, { __call = function(_, ...) return tpbat.register(...) end })