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--[[
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 bat = {}
local function worker(args)
local args = args or {}
local timeout = args.timeout or 30
local battery = args.battery or "BAT0"
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",
perc = "N/A",
time = "N/A",
watt = "N/A"
}
local bstr = "/sys/class/power_supply/" .. battery
local present = first_line(bstr .. "/present")
if present == "1"
then
local rate = first_line(bstr .. "/power_now") or
first_line(bstr .. "/current_now")
local ratev = first_line(bstr .. "/voltage_now")
local rem = first_line(bstr .. "/energy_now") or
first_line(bstr .. "/charge_now")
local tot = first_line(bstr .. "/energy_full") or
first_line(bstr .. "/charge_full")
bat_now.status = first_line(bstr .. "/status") or "N/A"
rate = tonumber(rate) or 1
ratev = tonumber(ratev)
rem = tonumber(rem)
tot = tonumber(tot)
local time_rat = 0
if bat_now.status == "Charging"
then
time_rat = (tot - rem) / rate
elseif bat_now.status == "Discharging"
then
time_rat = rem / rate
end
local hrs = math.floor(time_rat)
if hrs < 0 then hrs = 0 elseif hrs > 23 then hrs = 23 end
local min = math.floor((time_rat - hrs) * 60)
if min < 0 then min = 0 elseif min > 59 then min = 59 end
bat_now.time = string.format("%02d:%02d", hrs, min)
bat_now.perc = first_line(bstr .. "/capacity")
if not bat_now.perc then
local perc = (rem / tot) * 100
if perc <= 100 then
bat_now.perc = string.format("%d", perc)
elseif perc > 100 then
bat_now.perc = "100"
elseif perc < 0 then
bat_now.perc = "0"
end
end
if rate ~= nil and ratev ~= nil then
bat_now.watt = string.format("%.2fW", (rate * ratev) / 1e12)
else
bat_now.watt = "N/A"
end
end
widget = bat.widget
settings()
-- notifications for low and critical states
if bat_now.status == "Discharging" and notify == "on" and bat_now.perc ~= nil
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("bat", timeout, update)
return bat.widget
end
return setmetatable(bat, { __call = function(_, ...) return worker(...) end })
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