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 = { abs = math.abs,
20 local string = { format = string.format }
22 local tonumber = tonumber
23 local setmetatable = setmetatable
28 local function worker(args)
30 local args = args or {}
31 local timeout = args.timeout or 30
32 local batteries = args.batteries or (args.battery and {args.battery}) or {"BAT0"}
33 local ac = args.ac or "AC0"
34 local notify = args.notify or "on"
35 local settings = args.settings or function() end
37 bat.widget = wibox.widget.textbox('')
39 bat_notification_low_preset = {
40 title = "Battery low",
41 text = "Plug the cable!",
47 bat_notification_critical_preset = {
48 title = "Battery exhausted",
49 text = "Shutdown imminent",
64 for i = 1, #batteries do
65 bat_now.n_status[i] = "N/A"
69 local sum_rate_current = 0
70 local sum_rate_voltage = 0
71 local sum_rate_power = 0
72 local sum_energy_now = 0
73 local sum_energy_full = 0
74 local sum_energy_percentage = 0
75 local pspath = "/sys/class/power_supply/"
77 for i, battery in ipairs(batteries) do
78 local bstr = pspath .. battery
79 local present = first_line(bstr .. "/present")
81 if tonumber(present) == 1 then
82 -- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW]
83 local rate_current = tonumber(first_line(bstr .. "/current_now"))
84 local rate_voltage = tonumber(first_line(bstr .. "/voltage_now"))
85 local rate_power = tonumber(first_line(bstr .. "/power_now"))
87 -- energy_now(P)[uWh], charge_now(I)[uAh]
88 local energy_now = tonumber(first_line(bstr .. "/energy_now") or
89 first_line(bstr .. "/charge_now"))
91 -- energy_full(P)[uWh], charge_full(I)[uAh]
92 local energy_full = tonumber(first_line(bstr .. "/energy_full") or
93 first_line(bstr .. "/charge_full"))
95 local energy_percentage = tonumber(first_line(bstr .. "/capacity")) or
96 math.floor((energy_now / energy_full) * 100)
98 bat_now.n_status[i] = first_line(bstr .. "/status") or "N/A"
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 or 0)
104 sum_energy_full = sum_energy_full + energy_full
105 sum_energy_percentage = sum_energy_percentage + energy_percentage
109 bat_now.status = bat_now.n_status[1]
110 bat_now.ac_status = tonumber(first_line(string.format("%s%s/online", pspath, ac))) or "N/A"
112 if bat_now.status ~= "N/A" then
113 -- update {perc,time,watt} iff battery not full and rate > 0
114 if bat_now.status ~= "Full" and (sum_rate_current > 0 or sum_rate_power > 0) then
117 if bat_now.status == "Charging" then
118 rate_time = (sum_energy_full - sum_energy_now) / (sum_rate_power or sum_rate_current)
120 rate_time = sum_energy_now / (sum_rate_power or sum_rate_current)
123 if rate_time < 0.01 then -- check for magnitude discrepancies
124 rate_time_magnitude = math.abs(math.floor(math.log10(rate_time)))
125 rate_time = rate_time * 10^(rate_time_magnitude - 2)
128 local hours = math.floor(rate_time)
129 local minutes = math.floor((rate_time - hours) * 60)
130 bat_now.perc = tonumber(string.format("%d", math.min(100, sum_energy_percentage / #batteries)))
131 bat_now.time = string.format("%02d:%02d", hours, minutes)
132 bat_now.watt = tonumber(string.format("%.2f", sum_rate_power / 1e6))
133 elseif bat_now.status == "Full" then
135 bat_now.time = "00:00"
143 -- notifications for low and critical states
144 if notify == "on" and bat_now.perc and bat_now.status == "Discharging" then
145 if bat_now.perc <= 5 then
146 bat.id = naughty.notify({
147 preset = bat_notification_critical_preset,
150 elseif bat_now.perc <= 15 then
151 bat.id = naughty.notify({
152 preset = bat_notification_low_preset,
159 newtimer(battery, timeout, update)
161 return setmetatable(bat, { __index = bat.widget })
164 return setmetatable({}, { __call = function(_, ...) return worker(...) end })