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.
4 Licensed under GNU General Public License v2
5 * (c) 2013, Luke Bonham
6 * (c) 2010-2012, Peter Hofmann
10 local newtimer = require("lain.helpers").newtimer
11 local first_line = require("lain.helpers").first_line
13 local naughty = require("naughty")
14 local wibox = require("wibox")
16 local math = { floor = math.floor, min = math.min }
17 local string = { format = string.format }
18 local tonumber = tonumber
20 local setmetatable = setmetatable
25 local function worker(args)
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
34 bat.widget = wibox.widget.textbox('')
36 bat_notification_low_preset = {
37 title = "Battery low",
38 text = "Plug the cable!",
44 bat_notification_critical_preset = {
45 title = "Battery exhausted",
46 text = "Shutdown imminent",
54 status = "Not present",
61 local sum_rate_current = 0
62 local sum_rate_voltage = 0
63 local sum_rate_power = 0
64 local sum_energy_now = 0
65 local sum_energy_full = 0
66 local sum_energy_percentage = 0
68 for i, battery in ipairs(batteries) do
69 local bstr = "/sys/class/power_supply/" .. battery
70 local present = first_line(bstr .. "/present")
74 -- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW]
75 local rate_current = tonumber(first_line(bstr .. "/current_now"))
76 local rate_voltage = tonumber(first_line(bstr .. "/voltage_now"))
77 local rate_power = tonumber(first_line(bstr .. "/power_now"))
79 -- energy_now(P)[uWh], charge_now(I)[uAh]
80 local energy_now = tonumber(first_line(bstr .. "/energy_now") or
81 first_line(bstr .. "/charge_now"))
83 -- energy_full(P)[uWh], charge_full(I)[uAh]
84 local energy_full = tonumber(first_line(bstr .. "/energy_full") or
85 first_line(bstr .. "/charge_full"))
87 local energy_percentage = tonumber(first_line(bstr .. "/capacity")) or
88 math.floor((energy_now / energy_full) * 100)
90 if bat_now.status ~= "Charging" and bat_now.status ~= "Discharging"
92 bat_now.status = first_line(bstr .. "/status") or "N/A"
95 sum_rate_current = sum_rate_current + (rate_current or 0)
96 sum_rate_voltage = sum_rate_voltage + rate_voltage
97 sum_rate_power = sum_rate_power + (rate_power or ((rate_voltage * rate_current) / 1e6))
98 sum_energy_now = sum_energy_now + energy_now
99 sum_energy_full = sum_energy_full + energy_full
100 sum_energy_percentage = sum_energy_percentage + energy_percentage
104 local astr = "/sys/class/power_supply/" .. ac
105 bat_now.ac_status = first_line(astr .. "/online") or "N/A"
107 -- update {perc,time,watt} iff rate > 0 and battery not full
108 if ((sum_rate_current > 0) or (sum_rate_power > 0))
109 and bat_now.status ~= "N/A" and bat_now.status ~= "Full"
112 if bat_now.status == "Charging" then
113 rate_time = (sum_energy_full - sum_energy_now) / (sum_rate_power or sum_rate_current)
114 elseif bat_now.status == "Discharging" then
115 rate_time = sum_energy_now / (sum_rate_power or sum_rate_current)
118 local hours = math.floor(rate_time)
119 local minutes = math.floor((rate_time - hours) * 60)
120 local watt = sum_rate_power / 1e6
121 bat_now.perc = string.format("%d", math.min(100, sum_energy_percentage / table.getn(batteries)))
122 bat_now.time = string.format("%02d:%02d", hours, minutes)
123 bat_now.watt = string.format("%.2fW", watt)
129 -- notifications for low and critical states
130 if bat_now.status == "Discharging" and notify == "on" and bat_now.perc then
131 local nperc = tonumber(bat_now.perc) or 100
133 bat.id = naughty.notify({
134 preset = bat_notification_critical_preset,
135 replaces_id = bat.id,
137 elseif nperc <= 15 then
138 bat.id = naughty.notify({
139 preset = bat_notification_low_preset,
140 replaces_id = bat.id,
146 newtimer(battery, timeout, update)
148 return setmetatable(bat, { __index = bat.widget })
151 return setmetatable({}, { __call = function(_, ...) return worker(...) end })