]> git.madduck.net Git - etc/awesome.git/blob - widgets/bat.lua

madduck's git repository

Every one of the projects in this repository is available at the canonical URL git://git.madduck.net/madduck/pub/<projectpath> — see each project's metadata for the exact URL.

All patches and comments are welcome. Please squash your changes to logical commits before using git-format-patch and git-send-email to patches@git.madduck.net. If you'd read over the Git project's submission guidelines and adhered to them, I'd be especially grateful.

SSH access, as well as push access can be individually arranged.

If you use my repositories frequently, consider adding the following snippet to ~/.gitconfig and using the third clone URL listed for each project:

[url "git://git.madduck.net/madduck/"]
  insteadOf = madduck:

a6a8b4fc92fb1655b3e2a0784415744937c3607f
[etc/awesome.git] / widgets / bat.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2013,      Luke Bonham                
6       * (c) 2010-2012, Peter Hofmann              
7                                                   
8 --]]
9
10 local newtimer     = require("lain.helpers").newtimer
11 local first_line   = require("lain.helpers").first_line
12
13 local naughty      = require("naughty")
14 local wibox        = require("wibox")
15
16 local math         = { floor  = math.floor }
17 local string       = { format = string.format }
18 local tonumber     = tonumber
19
20 local setmetatable = setmetatable
21
22 -- Battery infos
23 -- lain.widgets.bat
24
25 local function worker(args)
26     local bat      = {}
27     local args     = args or {}
28     local timeout  = args.timeout or 30
29     local battery  = args.battery or "BAT0"
30     local ac       = args.ac or "AC0"
31     local notify   = args.notify or "on"
32     local settings = args.settings or function() end
33
34     bat.widget = wibox.widget.textbox('')
35
36     bat_notification_low_preset = {
37         title = "Battery low",
38         text = "Plug the cable!",
39         timeout = 15,
40         fg = "#202020",
41         bg = "#CDCDCD"
42     }
43
44     bat_notification_critical_preset = {
45         title = "Battery exhausted",
46         text = "Shutdown imminent",
47         timeout = 15,
48         fg = "#000000",
49         bg = "#FFFFFF"
50     }
51
52     function update()
53         bat_now = {
54             status    = "Not present",
55             ac_status = "N/A",
56             perc      = "N/A",
57             time      = "N/A",
58             watt      = "N/A"
59         }
60
61         local bstr    = "/sys/class/power_supply/" .. battery
62         local present = first_line(bstr .. "/present")
63
64         if present == "1"
65         then
66             local ratep    = tonumber(first_line(bstr .. "/power_now"))
67             local ratec    = tonumber(first_line(bstr .. "/current_now"))
68             local ratev    = tonumber(first_line(bstr .. "/voltage_now"))
69
70             local rem      = tonumber(first_line(bstr .. "/energy_now") or
71                                       first_line(bstr .. "/charge_now"))
72
73             local tot      = tonumber(first_line(bstr .. "/energy_full") or
74                                       first_line(bstr .. "/charge_full"))
75
76             bat_now.status = first_line(bstr .. "/status") or "N/A"
77             bat_now.ac_status = first_line(string.format("/sys/class/power_supply/%s/online", ac)) or "N/A"
78
79             local time_rat = 0
80             if bat_now.status == "Charging"
81             then
82                 time_rat = (tot - rem) / (ratep or ratec)
83             elseif bat_now.status == "Discharging"
84             then
85                 time_rat = rem / (ratep or ratec)
86             end
87
88             local hrs = math.floor(time_rat)
89             if hrs < 0 then hrs = 0 elseif hrs > 23 then hrs = 23 end
90
91             local min = math.floor((time_rat - hrs) * 60)
92             if min < 0 then min = 0 elseif min > 59 then min = 59 end
93
94             bat_now.time = string.format("%02d:%02d", hrs, min)
95
96             local perc = tonumber(first_line(bstr .. "/capacity")) or math.floor((rem / tot) * 100)
97
98             if perc <= 100 then
99                 bat_now.perc = string.format("%d", perc)
100             elseif perc > 100 then
101                 bat_now.perc = "100"
102             elseif perc < 0 then
103                 bat_now.perc = "0"
104             end
105
106             if ratep then
107                 bat_now.watt = string.format("%.2fW", ratep)
108             else
109                 bat_now.watt = string.format("%.2fW", (ratev * ratec) / 1e12)
110             end
111         end
112
113         widget = bat.widget
114         settings()
115
116         -- notifications for low and critical states
117         if bat_now.status == "Discharging" and notify == "on" and bat_now.perc
118         then
119             local nperc = tonumber(bat_now.perc) or 100
120             if nperc <= 5
121             then
122                 bat.id = naughty.notify({
123                     preset = bat_notification_critical_preset,
124                     replaces_id = bat.id,
125                 }).id
126             elseif nperc <= 15
127             then
128                 bat.id = naughty.notify({
129                     preset = bat_notification_low_preset,
130                     replaces_id = bat.id,
131                 }).id
132             end
133         end
134     end
135
136     newtimer(battery, timeout, update)
137
138     return setmetatable(bat, { __index = bat.widget })
139 end
140
141 return setmetatable({}, { __call = function(_, ...) return worker(...) end })