--[[ Licensed under GNU General Public License v2 * (c) 2013, Luke Bonham * (c) 2010-2012, Peter Hofmann --]] local newtimer = require("lain.helpers").newtimer local first_line = require("lain.helpers").first_line local naughty = require("naughty") local wibox = require("wibox") local math = { floor = math.floor } local string = { format = string.format } local tonumber = tonumber local setmetatable = setmetatable -- Battery infos -- lain.widgets.bat local function worker(args) local bat = {} local args = args or {} local timeout = args.timeout or 30 local battery = args.battery or "BAT0" local ac = args.ac or "AC0" local notify = args.notify or "on" local settings = args.settings or function() end bat.widget = wibox.widget.textbox('') bat_notification_low_preset = { title = "Battery low", text = "Plug the cable!", timeout = 15, fg = "#202020", bg = "#CDCDCD" } bat_notification_critical_preset = { title = "Battery exhausted", text = "Shutdown imminent", timeout = 15, fg = "#000000", bg = "#FFFFFF" } function update() bat_now = { status = "Not present", ac_status = "N/A", perc = "N/A", time = "N/A", watt = "N/A" } local bstr = "/sys/class/power_supply/" .. battery local astr = "/sys/class/power_supply/" .. ac local present = first_line(bstr .. "/present") if present == "1" then -- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW] local rate_current = tonumber(first_line(bstr .. "/current_now")) local rate_voltage = tonumber(first_line(bstr .. "/voltage_now")) local rate_power = tonumber(first_line(bstr .. "/power_now")) -- energy_now(P)[uWh], charge_now(I)[uAh] local energy_now = tonumber(first_line(bstr .. "/energy_now") or first_line(bstr .. "/charge_now")) -- energy_full(P)[uWh], charge_full(I)[uAh] local energy_full = tonumber(first_line(bstr .. "/energy_full") or first_line(bstr .. "/charge_full")) local energy_percentage = tonumber(first_line(bstr .. "/capacity")) or math.floor((energy_now / energy_full) * 100) bat_now.status = first_line(bstr .. "/status") or "N/A" bat_now.ac_status = first_line(astr .. "/online") or "N/A" -- update {perc,time,watt} iff rate > 0 and battery not full if ((rate_current and rate_current > 0) or (rate_power and rate_power > 0)) and bat_now.status ~= "N/A" and bat_now.status ~= "Full" then local rate_time = 0 if bat_now.status == "Charging" then rate_time = (energy_full - energy_now) / (rate_power or rate_current) elseif bat_now.status == "Discharging" then rate_time = energy_now / (rate_power or rate_current) end local hours = math.floor(rate_time) local minutes = math.floor((rate_time - hours) * 60) local watt = rate_power and (rate_power / 1e6) or (rate_voltage * rate_current) / 1e12 bat_now.perc = string.format("%d", energy_percentage) bat_now.time = string.format("%02d:%02d", hours, minutes) bat_now.watt = string.format("%.2fW", watt) end end widget = bat.widget settings() -- notifications for low and critical states if bat_now.status == "Discharging" and notify == "on" and bat_now.perc then local nperc = tonumber(bat_now.perc) or 100 if nperc <= 5 then bat.id = naughty.notify({ preset = bat_notification_critical_preset, replaces_id = bat.id, }).id elseif nperc <= 15 then bat.id = naughty.notify({ preset = bat_notification_low_preset, replaces_id = bat.id, }).id end end end newtimer(battery, timeout, update) return setmetatable(bat, { __index = bat.widget }) end return setmetatable({}, { __call = function(_, ...) return worker(...) end })