--[[ Licensed under GNU General Public License v2 * (c) 2013, Luke Bonham * (c) 2010-2012, Peter Hofmann --]] local helpers = require("lain.helpers") local first_line = require("lain.helpers").first_line local naughty = require("naughty") local wibox = require("wibox") local math = { abs = math.abs, floor = math.floor, log10 = math.log10, min = math.min } local string = { format = string.format } local type = type local tonumber = tonumber local setmetatable = setmetatable -- Battery infos -- lain.widgets.bat local function worker(args) local bat = helpers.make_widget_textbox() local args = args or {} local timeout = args.timeout or 30 local batteries = args.batteries or (args.battery and {args.battery}) or {"BAT0"} local ac = args.ac or "AC0" local notify = args.notify or "on" local settings = args.settings or function() end 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" } bat_now = { status = "N/A", ac_status = "N/A", perc = "N/A", time = "N/A", watt = "N/A" } bat_now.n_status = {} bat_now.n_perc = {} for i = 1, #batteries do bat_now.n_status[i] = "N/A" bat_now.n_perc[i] = 0 end function bat.update() local sum_rate_current = 0 local sum_rate_voltage = 0 local sum_rate_power = 0 local sum_rate_energy = 0 local sum_energy_now = 0 local sum_energy_full = 0 local pspath = "/sys/class/power_supply/" for i, battery in ipairs(batteries) do local bstr = pspath .. battery local present = first_line(bstr .. "/present") if tonumber(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.n_status[i] = first_line(bstr .. "/status") or "N/A" bat_now.n_perc[i] = energy_percentage or bat_now.n_perc[i] sum_rate_current = sum_rate_current + (rate_current or 0) sum_rate_voltage = sum_rate_voltage + (rate_voltage or 0) sum_rate_power = sum_rate_power + (rate_power or 0) sum_rate_energy = sum_rate_energy + (rate_power or (((rate_voltage or 0) * (rate_current or 0)) / 1e6)) sum_energy_now = sum_energy_now + (energy_now or 0) sum_energy_full = sum_energy_full + (energy_full or 0) end end -- When one of the battery is charging, others' status are either -- "Full", "Unknown" or "Charging". When the laptop is not plugged in, -- one or more of the batteries may be full, but only one battery -- discharging suffices to set global status to "Discharging". bat_now.status = bat_now.n_status[1] for _,status in ipairs(bat_now.n_status) do if status == "Discharging" or status == "Charging" then bat_now.status = status end end bat_now.ac_status = tonumber(first_line(string.format("%s%s/online", pspath, ac))) or "N/A" if bat_now.status ~= "N/A" then -- update {perc,time,watt} iff battery not full and rate > 0 if bat_now.status ~= "Full" and (sum_rate_power > 0 or sum_rate_current > 0) then local rate_time = 0 local div = (sum_rate_power > 0 and sum_rate_power) or sum_rate_current if bat_now.status == "Charging" then rate_time = (sum_energy_full - sum_energy_now) / div else -- Discharging rate_time = sum_energy_now / div end if 0 < rate_time and rate_time < 0.01 then -- check for magnitude discrepancies (#199) rate_time_magnitude = math.abs(math.floor(math.log10(rate_time))) rate_time = rate_time * 10^(rate_time_magnitude - 2) end local hours = math.floor(rate_time) local minutes = math.floor((rate_time - hours) * 60) bat_now.perc = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100)) bat_now.time = string.format("%02d:%02d", hours, minutes) bat_now.watt = tonumber(string.format("%.2f", sum_rate_energy / 1e6)) elseif bat_now.status ~= "Full" and sum_rate_power == 0 and bat_now.ac_status == 1 then bat_now.perc = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100)) bat_now.time = "00:00" bat_now.watt = 0 elseif bat_now.status == "Full" then bat_now.perc = 100 bat_now.time = "00:00" bat_now.watt = 0 end end widget = bat.widget settings() -- notifications for low and critical states if notify == "on" and type(bat_now.perc) == "number" and bat_now.status == "Discharging" then if bat_now.perc <= 5 then bat.id = naughty.notify({ preset = bat_notification_critical_preset, replaces_id = bat.id }).id elseif bat_now.perc <= 15 then bat.id = naughty.notify({ preset = bat_notification_low_preset, replaces_id = bat.id }).id end end end helpers.newtimer(battery, timeout, bat.update) return bat end return setmetatable({}, { __call = function(_, ...) return worker(...) end })