]> 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:

5f049e204d55626776fa2aad051692370054dada
[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, min = math.min }
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 batteries = args.batteries or (args.battery and {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         bat_now.n_status = {}
62         for i = 1, #batteries do
63             bat_now.n_status[i] = "Not present"
64         end
65
66         local sum_rate_current = 0
67         local sum_rate_voltage = 0
68         local sum_rate_power = 0
69         local sum_energy_now = 0
70         local sum_energy_full = 0
71         local sum_energy_percentage = 0
72
73         for i, battery in ipairs(batteries) do
74             local bstr    = "/sys/class/power_supply/" .. battery
75             local present = first_line(bstr .. "/present")
76
77             if present == "1"
78             then
79                 -- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW]
80                 local rate_current      = tonumber(first_line(bstr .. "/current_now"))
81                 local rate_voltage      = tonumber(first_line(bstr .. "/voltage_now"))
82                 local rate_power        = tonumber(first_line(bstr .. "/power_now"))
83
84                 -- energy_now(P)[uWh], charge_now(I)[uAh]
85                 local energy_now        = tonumber(first_line(bstr .. "/energy_now") or
86                                           first_line(bstr .. "/charge_now"))
87
88                 -- energy_full(P)[uWh], charge_full(I)[uAh]
89                 local energy_full       = tonumber(first_line(bstr .. "/energy_full") or
90                                           first_line(bstr .. "/charge_full"))
91
92                 local energy_percentage = tonumber(first_line(bstr .. "/capacity")) or
93                                           math.floor((energy_now / energy_full) * 100)
94
95                 if bat_now.n_status[i] ~= "Charging" and bat_now.n_status[i] ~= "Discharging"
96                 then
97                     bat_now.n_status[i] = first_line(bstr .. "/status") or "N/A"
98                 end
99
100                 sum_rate_current      = sum_rate_current + (rate_current or 0)
101                 sum_rate_voltage      = sum_rate_voltage + rate_voltage
102                 sum_rate_power        = sum_rate_power + (rate_power or ((rate_voltage * rate_current) / 1e6))
103                 sum_energy_now        = sum_energy_now + energy_now
104                 sum_energy_full       = sum_energy_full + energy_full
105                 sum_energy_percentage = sum_energy_percentage + energy_percentage
106             end
107         end
108
109         bat_now.status = bat_now.n_status[1]
110         bat_now.ac_status = first_line(string.format("/sys/class/power_supply/%s/online", ac)) or "N/A"
111
112         -- update {perc,time,watt} iff rate > 0 and battery not full
113         if (sum_rate_current > 0 or sum_rate_power > 0)
114            and bat_now.status ~= "N/A" and bat_now.status ~= "Full"
115         then
116             local rate_time = 0
117
118             if bat_now.status == "Charging" then
119                 rate_time = (sum_energy_full - sum_energy_now) / (sum_rate_power or sum_rate_current)
120             elseif bat_now.status == "Discharging" then
121                 rate_time = sum_energy_now / (sum_rate_power or sum_rate_current)
122             end
123
124             local hours   = math.floor(rate_time)
125             local minutes = math.floor((rate_time - hours) * 60)
126             local watt    = sum_rate_power / 1e6
127
128             bat_now.perc  = string.format("%d", math.min(100, sum_energy_percentage / #batteries))
129             bat_now.time  = string.format("%02d:%02d", hours, minutes)
130             bat_now.watt  = string.format("%.2fW", watt)
131         end
132
133         widget = bat.widget
134         settings()
135
136         -- notifications for low and critical states
137         if bat_now.status == "Discharging" and notify == "on" and bat_now.perc then
138             local nperc = tonumber(bat_now.perc) or 100
139             if nperc <= 5 then
140                 bat.id = naughty.notify({
141                     preset = bat_notification_critical_preset,
142                     replaces_id = bat.id,
143                 }).id
144             elseif nperc <= 15 then
145                 bat.id = naughty.notify({
146                     preset = bat_notification_low_preset,
147                     replaces_id = bat.id,
148                 }).id
149             end
150         end
151     end
152
153     newtimer(battery, timeout, update)
154
155     return setmetatable(bat, { __index = bat.widget })
156 end
157
158 return setmetatable({}, { __call = function(_, ...) return worker(...) end })