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
19 local tostring = tostring
21 local setmetatable = setmetatable
26 local function worker(args)
28 local args = args or {}
29 local timeout = args.timeout or 30
30 local batteries = args.batteries or (args.battery and {args.battery}) or {"BAT0"}
31 local ac = args.ac or "AC0"
32 local notify = args.notify or "on"
33 local settings = args.settings or function() end
35 bat.widget = wibox.widget.textbox('')
37 bat_notification_low_preset = {
38 title = "Battery low",
39 text = "Plug the cable!",
45 bat_notification_critical_preset = {
46 title = "Battery exhausted",
47 text = "Shutdown imminent",
62 for i = 1, #batteries do
63 bat_now.n_status[i] = "N/A"
67 local sum_rate_current = 0
68 local sum_rate_voltage = 0
69 local sum_rate_power = 0
70 local sum_energy_now = 0
71 local sum_energy_full = 0
72 local sum_energy_percentage = 0
73 local pspath = "/sys/class/power_supply/"
75 for i, battery in ipairs(batteries) do
76 local bstr = pspath .. battery
77 local present = first_line(bstr .. "/present")
79 if tonumber(present) == 1 then
80 -- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW]
81 local rate_current = tonumber(first_line(bstr .. "/current_now"))
82 local rate_voltage = tonumber(first_line(bstr .. "/voltage_now"))
83 local rate_power = tonumber(first_line(bstr .. "/power_now"))
85 -- energy_now(P)[uWh], charge_now(I)[uAh]
86 local energy_now = tonumber(first_line(bstr .. "/energy_now") or
87 first_line(bstr .. "/charge_now"))
89 -- energy_full(P)[uWh], charge_full(I)[uAh]
90 local energy_full = tonumber(first_line(bstr .. "/energy_full") or
91 first_line(bstr .. "/charge_full"))
93 local energy_percentage = tonumber(first_line(bstr .. "/capacity")) or
94 math.floor((energy_now / energy_full) * 100)
96 bat_now.n_status[i] = first_line(bstr .. "/status") or "N/A"
98 sum_rate_current = sum_rate_current + (rate_current or 0)
99 sum_rate_voltage = sum_rate_voltage + rate_voltage
100 sum_rate_power = sum_rate_power + (rate_power or ((rate_voltage * rate_current) / 1e6))
101 sum_energy_now = sum_energy_now + (energy_now or 0)
102 sum_energy_full = sum_energy_full + energy_full
103 sum_energy_percentage = sum_energy_percentage + energy_percentage
107 bat_now.status = bat_now.n_status[1]
108 bat_now.ac_status = tonumber(first_line(string.format("%s%s/online", pspath, ac))) or "N/A"
110 if bat_now.status ~= "N/A" then
111 -- update {perc,time,watt} iff battery not full and rate > 0
112 if bat_now.status ~= "Full" and (sum_rate_current > 0 or sum_rate_power > 0) then
113 local sum_rpc = sum_rate_power or sum_rate_current
115 local m1 = tostring(sum_rpc):len()
118 if bat_now.status == "Charging" then
119 enr = sum_energy_full - sum_energy_now
120 m2 = tostring(sum_energy_full):len()
123 m2 = tostring(enr):len()
126 -- solve magnitude differences, which may be caused
127 -- by file discrepancies
128 magnitude_diff = m1 - m2
129 if magnitude_diff > 0 then
130 sum_rpc = sum_rpc / 10^magnitude_diff
131 elseif magnitude_diff < 0 then
132 enr = enr / 10^(magnitude_diff * -1)
135 local rate_time = enr / sum_rpc
136 local hours = math.floor(rate_time)
137 local minutes = math.floor((rate_time - hours) * 60)
139 bat_now.perc = tonumber(string.format("%d", math.min(100, sum_energy_percentage / #batteries)))
140 bat_now.time = string.format("%02d:%02d", hours, minutes)
141 bat_now.watt = tonumber(string.format("%.2f", sum_rate_power / 1e6))
142 elseif bat_now.status == "Full" then
144 bat_now.time = "00:00"
152 -- notifications for low and critical states
153 if notify == "on" and bat_now.perc and bat_now.status == "Discharging" then
154 if bat_now.perc <= 5 then
155 bat.id = naughty.notify({
156 preset = bat_notification_critical_preset,
159 elseif bat_now.perc <= 15 then
160 bat.id = naughty.notify({
161 preset = bat_notification_low_preset,
168 newtimer(battery, timeout, update)
170 return setmetatable(bat, { __index = bat.widget })
173 return setmetatable({}, { __call = function(_, ...) return worker(...) end })