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d46697a895c620e551ae607d757ed7e197c9249d
[etc/awesome.git] / widgets / contrib / tpbat / init.lua
1 --[[
2      tpbat.lua
3      Battery status widget for ThinkPad laptops that use SMAPI
4      lain.widgets.contrib.tpbat
5
6      More on tp_smapi: http://www.thinkwiki.org/wiki/Tp_smapi
7
8      Licensed under GNU General Public License v2 
9       * (c) 2013,      Conor Heine
10       * (c) 2013,      Luke Bonham                
11       * (c) 2010-2012, Peter Hofmann              
12                                                   
13 --]]
14
15 local newtimer     = require("lain.helpers").newtimer
16 local first_line   = require("lain.helpers").first_line
17 local beautiful    = require("beautiful")
18 local naughty      = require("naughty")
19 local wibox        = require("wibox")
20 local smapi        = require("lain.widgets.contrib.tpbat.smapi") -- Ugly :(
21
22 local string       = { format = string.format }
23 local math         = { floor = math.floor }
24 local tostring     = tostring
25 local setmetatable = setmetatable
26
27 -- ThinkPad SMAPI-enabled battery info widget
28 local tpbat = { }
29
30 local tpbat_notification = nil
31
32 function tpbat:hide()
33     if tpbat_notification ~= nil then
34         naughty.destroy(tpbat_notification)
35         tpbat_notification = nil
36     end
37 end
38
39 function tpbat:show(t_out)
40     tpbat:hide()
41     
42     local bat = self.bat
43     if bat == nil or not bat:installed() then return end
44
45     local mfgr   = bat:get('manufacturer') or "no_mfgr"
46     local model  = bat:get('model') or "no_model"
47     local chem   = bat:get('chemistry') or "no_chem"
48     local status = bat:get('state') or "nil"
49     local time   = bat:remaining_time()
50     local msg    = "\t"
51
52     if status ~= "idle" and status ~= "nil" then
53         if time == "N/A" then
54             msg = "...Calculating time remaining..."
55         else
56             msg = time .. (status == "charging" and " until charged" or " remaining")
57         end
58     else
59         msg = "On AC Power"
60     end
61
62     local str = string.format("%s : %s %s (%s)\n", bat.name, mfgr, model, chem)
63     str = str .. string.format("\n%s \t\t\t %s", status:upper(), msg)
64
65     tpbat_notification = naughty.notify({
66         preset = { fg = beautiful.fg_normal },
67         text = str,
68         timeout = t_out
69     })
70 end
71
72 function tpbat.register(args)
73     local args = args or {}
74     local timeout = args.timeout or 30
75     local battery = args.battery or "BAT0"
76     local settings = args.settings or function() end
77
78     tpbat.bat = smapi:battery(battery) -- Create a new battery
79     local bat = tpbat.bat
80     
81     tpbat.widget = wibox.widget.textbox('')
82
83     if bat:get('state') == nil then
84         local n = naughty.notify({
85             title = "SMAPI Battery Warning: Unable to read battery state!",
86             text = "This widget is intended for ThinkPads. Is tp_smapi installed? Check your configs & paths.",
87             position = "top_right",
88             timeout = 15,
89             fg="#202020",
90             bg="#cdcdcd",
91             ontop = true
92         })
93     end
94
95     function update()
96         bat_now = {
97             status = "Not present",
98             perc   = "N/A",
99             time   = "N/A",
100             watt   = "N/A"
101         }
102
103         if bat:installed()
104         then
105             bat_now.status = bat:status()
106             bat_now.perc   = bat:percent()
107             bat_now.time   = bat:remaining_time()
108             -- bat_now.watt = string.format("%.2fW", (VOLTS * AMPS) / 1e12)
109
110             -- notifications for low and critical states
111             if bat_now.perc <= 5
112             then
113                 tpbat.id = naughty.notify({
114                     text = "shutdown imminent",
115                     title = "battery nearly exhausted",
116                     position = "top_right",
117                     timeout = 15,
118                     fg="#000000",
119                     bg="#ffffff",
120                     ontop = true,
121                     replaces_id = tpbat.id
122                 }).id
123             elseif bat_now.perc <= 15
124             then
125                 tpbat.id = naughty.notify({
126                     text = "plug the cable",
127                     title = "battery low",
128                     position = "top_right",
129                     timeout = 15,
130                     fg="#202020",
131                     bg="#cdcdcd",
132                     ontop = true,
133                     replaces_id = tpbat.id
134                 }).id
135             end
136
137             bat_now.perc = tostring(bat_now.perc)
138         end
139
140         widget = tpbat.widget -- 'widget' needed in rc.lua (following convention)
141         settings()
142     end
143
144     newtimer("tpbat", timeout, update)
145
146     widget:connect_signal('mouse::enter', function () tpbat:show(0) end)
147     widget:connect_signal('mouse::leave', function () tpbat:hide() end)
148
149     return tpbat.widget
150 end
151
152 return setmetatable(tpbat, { __call = function(_, ...) return tpbat.register(...) end })