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bat.lua
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--[[
Licensed under GNU General Public License v2
* (c) 2013, Luca CPZ
* (c) 2010-2012, Peter Hofmann
--]]
local helpers = require("lain.helpers")
local fs = require("gears.filesystem")
local naughty = require("naughty")
local wibox = require("wibox")
local math = math
local string = string
local ipairs = ipairs
local tonumber = tonumber
-- Battery infos
-- lain.widget.bat
local function factory(args)
local pspath = args.pspath or "/sys/class/power_supply/"
if not fs.is_dir(pspath) then
naughty.notify { text = "lain.widget.bat: invalid power supply path", timeout = 0 }
return
end
args = args or {}
local bat = { widget = args.widget or wibox.widget.textbox() }
local timeout = args.timeout or 30
local notify = args.notify or "on"
local full_notify = args.full_notify or notify
local n_perc = args.n_perc or { 5, 15 }
local batteries = args.batteries or (args.battery and {args.battery}) or {}
local ac = args.ac or "AC0"
local settings = args.settings or function() end
function bat.get_batteries()
helpers.line_callback("ls -1 " .. pspath, function(line)
local bstr = string.match(line, "BAT%w+")
if bstr then
batteries[#batteries + 1] = bstr
else
ac = string.match(line, "A%w+") or ac
end
end)
end
if #batteries == 0 then bat.get_batteries() end
bat_notification_critical_preset = {
title = "Battery exhausted",
text = "Shutdown imminent",
timeout = 15,
fg = "#000000",
bg = "#FFFFFF"
}
bat_notification_low_preset = {
title = "Battery low",
text = "Plug the cable!",
timeout = 15,
fg = "#202020",
bg = "#CDCDCD"
}
bat_notification_charged_preset = {
title = "Battery full",
text = "You can unplug the cable",
timeout = 15,
fg = "#202020",
bg = "#CDCDCD"
}
bat_now = {
status = "N/A",
ac_status = "N/A",
perc = "N/A",
time = "N/A",
watt = "N/A",
capacity = "N/A"
}
bat_now.n_status = {}
bat_now.n_perc = {}
bat_now.n_capacity = {}
for i = 1, #batteries do
bat_now.n_status[i] = "N/A"
bat_now.n_perc[i] = 0
bat_now.n_capacity[i] = 0
end
-- used to notify full charge only once before discharging
local fullnotification = false
function bat.update()
-- luacheck: globals bat_now
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 sum_charge_full = 0
local sum_charge_design = 0
for i, battery in ipairs(batteries) do
local bstr = pspath .. battery
local present = helpers.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(helpers.first_line(bstr .. "/current_now"))
local rate_voltage = tonumber(helpers.first_line(bstr .. "/voltage_now"))
local rate_power = tonumber(helpers.first_line(bstr .. "/power_now"))
local charge_full = tonumber(helpers.first_line(bstr .. "/charge_full"))
local charge_design = tonumber(helpers.first_line(bstr .. "/charge_full_design"))
-- energy_now(P)[uWh], charge_now(I)[uAh]
local energy_now = tonumber(helpers.first_line(bstr .. "/energy_now") or
helpers.first_line(bstr .. "/charge_now"))
-- energy_full(P)[uWh], charge_full(I)[uAh]
local energy_full = tonumber(helpers.first_line(bstr .. "/energy_full") or
charge_full)
local energy_percentage = tonumber(helpers.first_line(bstr .. "/capacity")) or
math.floor((energy_now / energy_full) * 100)
bat_now.n_status[i] = helpers.first_line(bstr .. "/status") or "N/A"
bat_now.n_perc[i] = energy_percentage or bat_now.n_perc[i]
if not charge_design or charge_design == 0 then
bat_now.n_capacity[i] = 0
else
bat_now.n_capacity[i] = math.floor((charge_full / charge_design) * 100)
end
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)
sum_charge_full = sum_charge_full + (charge_full or 0)
sum_charge_design = sum_charge_design + (charge_design or 0)
end
end
bat_now.capacity = math.floor(math.min(100, (sum_charge_full / sum_charge_design) * 100))
-- 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] or "N/A"
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(helpers.first_line(string.format("%s%s/online", pspath, ac))) or "N/A"
if bat_now.status ~= "N/A" then
if 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
-- update {perc,time,watt} iff battery not full and rate > 0
elseif bat_now.status ~= "Full" then
local rate_time = 0
-- Calculate time and watt if rates are greater then 0
if (sum_rate_power > 0 or sum_rate_current > 0) then
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
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" then
bat_now.perc = 100
bat_now.time = "00:00"
bat_now.watt = 0
end
end
widget = bat.widget
settings()
-- notifications for critical, low, and full levels
if notify == "on" then
if bat_now.status == "Discharging" then
if tonumber(bat_now.perc) <= n_perc[1] then
bat.id = naughty.notify({
preset = bat_notification_critical_preset,
replaces_id = bat.id
}).id
elseif tonumber(bat_now.perc) <= n_perc[2] then
bat.id = naughty.notify({
preset = bat_notification_low_preset,
replaces_id = bat.id
}).id
end
fullnotification = false
elseif bat_now.status == "Full" and full_notify == "on" and not fullnotification then
bat.id = naughty.notify({
preset = bat_notification_charged_preset,
replaces_id = bat.id
}).id
fullnotification = true
end
end
end
helpers.newtimer("batteries", timeout, bat.update)
return bat
end
return factory