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 first_line = require("lain.helpers").first_line
11 local newtimer = require("lain.helpers").newtimer
12 local naughty = require("naughty")
13 local wibox = require("wibox")
14 local math = { abs = math.abs,
18 local string = { format = string.format }
21 local tonumber = tonumber
22 local setmetatable = setmetatable
27 local function worker(args)
28 local bat = { widget = wibox.widget.textbox() }
29 local args = args or {}
30 local timeout = args.timeout or 30
31 local batteries = args.batteries or (args.battery and {args.battery}) or {"BAT0"}
32 local ac = args.ac or "AC0"
33 local notify = args.notify or "on"
34 local settings = args.settings or function() end
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",
62 for i = 1, #batteries do
63 bat_now.n_status[i] = "N/A"
68 local sum_rate_current = 0
69 local sum_rate_voltage = 0
70 local sum_rate_power = 0
71 local sum_rate_energy = 0
72 local sum_energy_now = 0
73 local sum_energy_full = 0
74 local pspath = "/sys/class/power_supply/"
76 for i, battery in ipairs(batteries) do
77 local bstr = pspath .. battery
78 local present = first_line(bstr .. "/present")
80 if tonumber(present) == 1 then
81 -- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW]
82 local rate_current = tonumber(first_line(bstr .. "/current_now"))
83 local rate_voltage = tonumber(first_line(bstr .. "/voltage_now"))
84 local rate_power = tonumber(first_line(bstr .. "/power_now"))
86 -- energy_now(P)[uWh], charge_now(I)[uAh]
87 local energy_now = tonumber(first_line(bstr .. "/energy_now") or
88 first_line(bstr .. "/charge_now"))
90 -- energy_full(P)[uWh], charge_full(I)[uAh]
91 local energy_full = tonumber(first_line(bstr .. "/energy_full") or
92 first_line(bstr .. "/charge_full"))
94 local energy_percentage = tonumber(first_line(bstr .. "/capacity")) or
95 math.floor((energy_now / energy_full) * 100)
97 bat_now.n_status[i] = first_line(bstr .. "/status") or "N/A"
98 bat_now.n_perc[i] = energy_percentage or bat_now.n_perc[i]
100 sum_rate_current = sum_rate_current + (rate_current or 0)
101 sum_rate_voltage = sum_rate_voltage + (rate_voltage or 0)
102 sum_rate_power = sum_rate_power + (rate_power or 0)
103 sum_rate_energy = sum_rate_energy + (rate_power or (((rate_voltage or 0) * (rate_current or 0)) / 1e6))
104 sum_energy_now = sum_energy_now + (energy_now or 0)
105 sum_energy_full = sum_energy_full + (energy_full or 0)
109 -- When one of the battery is charging, others' status are either
110 -- "Full", "Unknown" or "Charging". When the laptop is not plugged in,
111 -- one or more of the batteries may be full, but only one battery
112 -- discharging suffices to set global status to "Discharging".
113 bat_now.status = bat_now.n_status[1]
114 for _,status in ipairs(bat_now.n_status) do
115 if status == "Discharging" or status == "Charging" then
116 bat_now.status = status
119 bat_now.ac_status = tonumber(first_line(string.format("%s%s/online", pspath, ac))) or "N/A"
121 if bat_now.status ~= "N/A" then
122 if bat_now.status ~= "Full" and sum_rate_power == 0 and bat_now.ac_status == 1 then
123 bat_now.perc = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100))
124 bat_now.time = "00:00"
127 -- update {perc,time,watt} iff battery not full and rate > 0
128 elseif bat_now.status ~= "Full" then
130 -- Calculate time and watt if rates are greater then 0
131 if (sum_rate_power > 0 or sum_rate_current > 0) then
132 local div = (sum_rate_power > 0 and sum_rate_power) or sum_rate_current
134 if bat_now.status == "Charging" then
135 rate_time = (sum_energy_full - sum_energy_now) / div
137 rate_time = sum_energy_now / div
140 if 0 < rate_time and rate_time < 0.01 then -- check for magnitude discrepancies (#199)
141 rate_time_magnitude = math.abs(math.floor(math.log10(rate_time)))
142 rate_time = rate_time * 10^(rate_time_magnitude - 2)
146 local hours = math.floor(rate_time)
147 local minutes = math.floor((rate_time - hours) * 60)
148 bat_now.perc = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100))
149 bat_now.time = string.format("%02d:%02d", hours, minutes)
150 bat_now.watt = tonumber(string.format("%.2f", sum_rate_energy / 1e6))
151 elseif bat_now.status == "Full" then
153 bat_now.time = "00:00"
161 -- notifications for low and critical states
162 if notify == "on" and type(bat_now.perc) == "number" and bat_now.status == "Discharging" then
163 if bat_now.perc <= 5 then
164 bat.id = naughty.notify({
165 preset = bat_notification_critical_preset,
168 elseif bat_now.perc <= 15 then
169 bat.id = naughty.notify({
170 preset = bat_notification_low_preset,
177 newtimer("batteries", timeout, bat.update)
182 return setmetatable({}, { __call = function(_, ...) return worker(...) end })