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",
53 status = "Not present",
61 for i = 1, #batteries do
62 bat_now.n_status[i] = "Not present"
66 local sum_rate_current = 0
67 local sum_rate_voltage = 0
68 local sum_rate_power = 0
69 local sum_energy_now = 0
70 local sum_energy_full = 0
71 local sum_energy_percentage = 0
73 for i, battery in ipairs(batteries) do
74 local bstr = "/sys/class/power_supply/" .. battery
75 local present = first_line(bstr .. "/present")
79 -- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW]
80 local rate_current = tonumber(first_line(bstr .. "/current_now"))
81 local rate_voltage = tonumber(first_line(bstr .. "/voltage_now"))
82 local rate_power = tonumber(first_line(bstr .. "/power_now"))
84 -- energy_now(P)[uWh], charge_now(I)[uAh]
85 local energy_now = tonumber(first_line(bstr .. "/energy_now") or
86 first_line(bstr .. "/charge_now"))
88 -- energy_full(P)[uWh], charge_full(I)[uAh]
89 local energy_full = tonumber(first_line(bstr .. "/energy_full") or
90 first_line(bstr .. "/charge_full"))
92 local energy_percentage = tonumber(first_line(bstr .. "/capacity")) or
93 math.floor((energy_now / energy_full) * 100)
95 bat_now.n_status[i] = first_line(bstr .. "/status") or "N/A"
97 sum_rate_current = sum_rate_current + (rate_current or 0)
98 sum_rate_voltage = sum_rate_voltage + rate_voltage
99 sum_rate_power = sum_rate_power + (rate_power or ((rate_voltage * rate_current) / 1e6))
100 sum_energy_now = sum_energy_now + energy_now
101 sum_energy_full = sum_energy_full + energy_full
102 sum_energy_percentage = sum_energy_percentage + energy_percentage
106 bat_now.status = bat_now.n_status[1]
107 bat_now.ac_status = first_line(string.format("/sys/class/power_supply/%s/online", ac)) or "N/A"
109 -- update {perc,time,watt} iff battery not full and rate > 0
110 if bat_now.status ~= "Full" and (sum_rate_current > 0 or sum_rate_power > 0)
114 if bat_now.status == "Charging" then
115 rate_time = (sum_energy_full - sum_energy_now) / (sum_rate_power or sum_rate_current)
116 elseif bat_now.status == "Discharging" then
117 rate_time = sum_energy_now / (sum_rate_power or sum_rate_current)
120 local hours = math.floor(rate_time)
121 local minutes = math.floor((rate_time - hours) * 60)
122 local watt = sum_rate_power / 1e6
124 bat_now.perc = tonumber(string.format("%d", math.min(100, sum_energy_percentage / #batteries)))
125 bat_now.time = string.format("%02d:%02d", hours, minutes)
126 bat_now.watt = tonumber(string.format("%.2fW", watt))
132 -- notifications for low and critical states
133 if notify == "on" and bat_now.perc and bat_now.status == "Discharging" then
135 bat.id = naughty.notify({
136 preset = bat_notification_critical_preset,
139 elseif perc <= 15 then
140 bat.id = naughty.notify({
141 preset = bat_notification_low_preset,
148 newtimer(battery, timeout, update)
150 return setmetatable(bat, { __index = bat.widget })
153 return setmetatable({}, { __call = function(_, ...) return worker(...) end })