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8b53a4b25f986c9b294a3cc137478410289ef57b
[etc/awesome.git] / widgets / contrib / tpbat / init.lua
1
2 --[[
3                                                                
4      tpbat.lua                                                 
5      Battery status widget for ThinkPad laptops that use SMAPI 
6      lain.widgets.contrib.tpbat                                
7                                                                
8      More on tp_smapi: http://www.thinkwiki.org/wiki/Tp_smapi  
9                                                                
10      Licensed under GNU General Public License v2              
11       * (c) 2013,      Conor Heine                             
12       * (c) 2013,      Luke Bonham                             
13       * (c) 2010-2012, Peter Hofmann                           
14                                                                
15 --]]
16
17 local debug        = { getinfo = debug.getinfo }
18 local newtimer     = require("lain.helpers").newtimer
19 local first_line   = require("lain.helpers").first_line
20 local beautiful    = require("beautiful")
21 local naughty      = require("naughty")
22 local wibox        = require("wibox")
23
24 local string       = { format = string.format }
25 local math         = { floor = math.floor }
26 local tostring     = tostring
27 local setmetatable = setmetatable
28
29 package.path       = debug.getinfo(1,"S").source:match[[^@?(.*[\/])[^\/]-$]] .. "?.lua;" .. package.path
30 local smapi        = require("smapi")
31
32 -- ThinkPad SMAPI-enabled battery info widget
33 -- lain.widgets.contrib.tpbat
34 local tpbat = { }
35 local tpbat_notification = nil
36
37 function tpbat.hide()
38     if not tpbat.notification then return end
39     naughty.destroy(tpbat.notification)
40     tpbat.notification = nil
41 end
42
43 function tpbat.show(t_out)
44     tpbat.hide()
45
46     local bat   = self.bat
47
48     if bat == nil or not bat:installed() then return end
49
50     local t_out = t_out or 0
51     local mfgr   = bat:get('manufacturer') or "no_mfgr"
52     local model  = bat:get('model') or "no_model"
53     local chem   = bat:get('chemistry') or "no_chem"
54     local status = bat:get('state') or "nil"
55     local time   = bat:remaining_time()
56     local msg    = "\t"
57
58     if status ~= "idle" and status ~= "nil"
59     then
60         if time == "N/A"
61         then
62             msg = "...Calculating time remaining..."
63         else
64             msg = time .. (status == "charging" and " until charged" or " remaining")
65         end
66     else
67         msg = "On AC Power"
68     end
69
70     local str = string.format("%s : %s %s (%s)\n", bat.name, mfgr, model, chem)
71                 .. string.format("\n%s \t\t\t %s", status:upper(), msg)
72
73     tpbat_notification = naughty.notify({
74         preset = naughty.config.defaults,
75         text = str,
76         timeout = t_out,
77         screen = client.focus and client.focus.screen or 1
78     })
79 end
80
81 function tpbat.register(args)
82     local args = args or {}
83     local timeout = args.timeout or 30
84     local battery = args.battery or "BAT0"
85     local settings = args.settings or function() end
86
87     tpbat.bat = smapi:battery(battery) -- Create a new battery
88     local bat = tpbat.bat
89
90     tpbat.widget = wibox.widget.textbox('')
91
92     bat_notification_low_preset = {
93         title = "Battery low",
94         text = "Plug the cable!",
95         timeout = 15,
96         fg = "#202020",
97         bg = "#CDCDCD"
98     }
99
100     bat_notification_critical_preset = {
101         title = "Battery exhausted",
102         text = "Shutdown imminent",
103         timeout = 15,
104         fg = "#000000",
105         bg = "#FFFFFF"
106     }
107
108     if bat:get('state') == nil
109     then
110         local n = naughty.notify({
111             preset = bat_notification_low_preset,
112             title = "SMAPI Battery Warning: Unable to read battery state!",
113             text = "This widget is intended for ThinkPads. Is tp_smapi installed? Check your configs & paths.",
114             screen = client.focus and client.focus.screen or 1
115         })
116     end
117
118     function update()
119         bat_now = {
120             status = "Not present",
121             perc   = "N/A",
122             time   = "N/A",
123             watt   = "N/A"
124         }
125
126         if bat:installed()
127         then
128             bat_now.status = bat:status() or "N/A"
129             bat_now.perc   = bat:percent()
130             bat_now.time   = bat:remaining_time()
131             -- bat_now.watt = string.format("%.2fW", (VOLTS * AMPS) / 1e12)
132
133             -- notifications for low and critical states (when discharging)
134             if bat_now.status == "discharging"
135             then
136                 if bat_now.perc <= 5
137                 then
138                     tpbat.id = naughty.notify({
139                         preset = bat_notification_critical_preset,
140                         replaces_id = tpbat.id,
141                         screen = client.focus and client.focus.screen or 1
142                     }).id
143                 elseif bat_now.perc <= 15
144                 then
145                     tpbat.id = naughty.notify({
146                         preset = bat_notification_low_preset,
147                         replaces_id = tpbat.id,
148                         screen = client.focus and client.focus.screen or 1
149                     }).id
150                 end
151             end
152
153             bat_now.perc = tostring(bat_now.perc)
154         end
155
156         widget = tpbat.widget
157         settings()
158     end
159
160     newtimer("tpbat-" .. bat.name, timeout, update)
161
162     widget:connect_signal('mouse::enter', function () tpbat.show() end)
163     widget:connect_signal('mouse::leave', function () tpbat.hide() end)
164
165     return tpbat.widget
166 end
167
168 return setmetatable(tpbat, { __call = function(_, ...) return tpbat.register(...) end })