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 make_widget = require("lain.helpers").make_widget_textbox
12 local newtimer = require("lain.helpers").newtimer
14 local naughty = require("naughty")
15 local wibox = require("wibox")
17 local math = { abs = math.abs,
21 local string = { format = string.format }
25 local tonumber = tonumber
26 local setmetatable = setmetatable
31 local function worker(args)
32 local bat = make_widget()
33 local args = args or {}
34 local timeout = args.timeout or 30
35 local batteries = args.batteries or (args.battery and {args.battery}) or {"BAT0"}
36 local ac = args.ac or "AC0"
37 local notify = args.notify or "on"
38 local settings = args.settings or function() end
40 bat_notification_low_preset = {
41 title = "Battery low",
42 text = "Plug the cable!",
48 bat_notification_critical_preset = {
49 title = "Battery exhausted",
50 text = "Shutdown imminent",
66 for i = 1, #batteries do
67 bat_now.n_status[i] = "N/A"
72 local sum_rate_current = 0
73 local sum_rate_voltage = 0
74 local sum_rate_power = 0
75 local sum_rate_energy = 0
76 local sum_energy_now = 0
77 local sum_energy_full = 0
78 local pspath = "/sys/class/power_supply/"
80 for i, battery in ipairs(batteries) do
81 local bstr = pspath .. battery
82 local present = first_line(bstr .. "/present")
84 if tonumber(present) == 1 then
85 -- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW]
86 local rate_current = tonumber(first_line(bstr .. "/current_now"))
87 local rate_voltage = tonumber(first_line(bstr .. "/voltage_now"))
88 local rate_power = tonumber(first_line(bstr .. "/power_now"))
90 -- energy_now(P)[uWh], charge_now(I)[uAh]
91 local energy_now = tonumber(first_line(bstr .. "/energy_now") or
92 first_line(bstr .. "/charge_now"))
94 -- energy_full(P)[uWh], charge_full(I)[uAh]
95 local energy_full = tonumber(first_line(bstr .. "/energy_full") or
96 first_line(bstr .. "/charge_full"))
98 local energy_percentage = tonumber(first_line(bstr .. "/capacity")) or
99 math.floor((energy_now / energy_full) * 100)
101 bat_now.n_status[i] = first_line(bstr .. "/status") or "N/A"
102 bat_now.n_perc[i] = energy_percentage or bat_now.n_perc[i]
104 sum_rate_current = sum_rate_current + (rate_current or 0)
105 sum_rate_voltage = sum_rate_voltage + (rate_voltage or 0)
106 sum_rate_power = sum_rate_power + (rate_power or 0)
107 sum_rate_energy = sum_rate_energy + (rate_power or (((rate_voltage or 0) * (rate_current or 0)) / 1e6))
108 sum_energy_now = sum_energy_now + (energy_now or 0)
109 sum_energy_full = sum_energy_full + (energy_full or 0)
113 -- When one of the battery is charging, others' status are either
114 -- "Full", "Unknown" or "Charging". When the laptop is not plugged in,
115 -- one or more of the batteries may be full, but only one battery
116 -- discharging suffices to set global status to "Discharging".
117 bat_now.status = bat_now.n_status[1]
118 for _,status in ipairs(bat_now.n_status) do
119 if status == "Discharging" or status == "Charging" then
120 bat_now.status = status
123 bat_now.ac_status = tonumber(first_line(string.format("%s%s/online", pspath, ac))) or "N/A"
125 if bat_now.status ~= "N/A" then
126 -- update {perc,time,watt} iff battery not full and rate > 0
127 if bat_now.status ~= "Full" and (sum_rate_power > 0 or sum_rate_current > 0) then
129 local div = (sum_rate_power > 0 and sum_rate_power) or sum_rate_current
131 if bat_now.status == "Charging" then
132 rate_time = (sum_energy_full - sum_energy_now) / div
134 rate_time = sum_energy_now / div
137 if 0 < rate_time and rate_time < 0.01 then -- check for magnitude discrepancies (#199)
138 rate_time_magnitude = math.abs(math.floor(math.log10(rate_time)))
139 rate_time = rate_time * 10^(rate_time_magnitude - 2)
142 local hours = math.floor(rate_time)
143 local minutes = math.floor((rate_time - hours) * 60)
144 bat_now.perc = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100))
145 bat_now.time = string.format("%02d:%02d", hours, minutes)
146 bat_now.watt = tonumber(string.format("%.2f", sum_rate_energy / 1e6))
147 elseif bat_now.status ~= "Full" and sum_rate_power == 0 and bat_now.ac_status == 1 then
148 bat_now.perc = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100))
149 bat_now.time = "00:00"
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(battery, timeout, bat.update)
182 return setmetatable({}, { __call = function(_, ...) return worker(...) end })