216 lines
8 KiB
Lua
Executable file
216 lines
8 KiB
Lua
Executable file
--[[
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Licensed under GNU General Public License v2
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* (c) 2013, Luca CPZ
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* (c) 2010-2012, Peter Hofmann
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--]]
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local helpers = require("lain.helpers")
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local fs = require("gears.filesystem")
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local naughty = require("naughty")
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local wibox = require("wibox")
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local math = math
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local string = string
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local ipairs = ipairs
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local tonumber = tonumber
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-- Battery infos
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-- lain.widget.bat
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local function factory(args)
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local pspath = args.pspath or "/sys/class/power_supply/"
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if not fs.is_dir(pspath) then
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naughty.notify { text = "lain.widget.bat: invalid power supply path", timeout = 0 }
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return
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end
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local bat = { widget = wibox.widget.textbox() }
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local args = args or {}
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local timeout = args.timeout or 30
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local notify = args.notify or "on"
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local n_perc = args.n_perc or { 5, 15 }
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local batteries = args.batteries or (args.battery and {args.battery}) or {}
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local ac = args.ac or "AC0"
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local settings = args.settings or function() end
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function bat.get_batteries()
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helpers.line_callback("ls -1 " .. pspath, function(line)
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local bstr = string.match(line, "BAT%w+")
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if bstr then
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batteries[#batteries + 1] = bstr
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else
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ac = string.match(line, "A%w+") or "AC0"
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end
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end)
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end
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if #batteries == 0 then bat.get_batteries() end
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bat_notification_critical_preset = {
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title = "Battery exhausted",
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text = "Shutdown imminent",
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timeout = 15,
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fg = "#000000",
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bg = "#FFFFFF"
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}
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bat_notification_low_preset = {
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title = "Battery low",
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text = "Plug the cable!",
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timeout = 15,
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fg = "#202020",
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bg = "#CDCDCD"
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}
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bat_notification_charged_preset = {
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title = "Battery full",
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text = "You can unplug the cable",
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timeout = 15,
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fg = "#202020",
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bg = "#CDCDCD"
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}
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bat_now = {
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status = "N/A",
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ac_status = "N/A",
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perc = "N/A",
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time = "N/A",
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watt = "N/A"
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}
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bat_now.n_status = {}
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bat_now.n_perc = {}
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for i = 1, #batteries do
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bat_now.n_status[i] = "N/A"
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bat_now.n_perc[i] = 0
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end
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-- used to notify full charge only once before discharging
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local fullnotification = false
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function bat.update()
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local sum_rate_current = 0
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local sum_rate_voltage = 0
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local sum_rate_power = 0
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local sum_rate_energy = 0
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local sum_energy_now = 0
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local sum_energy_full = 0
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for i, battery in ipairs(batteries) do
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local bstr = pspath .. battery
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local present = helpers.first_line(bstr .. "/present")
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if tonumber(present) == 1 then
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-- current_now(I)[uA], voltage_now(U)[uV], power_now(P)[uW]
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local rate_current = tonumber(helpers.first_line(bstr .. "/current_now"))
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local rate_voltage = tonumber(helpers.first_line(bstr .. "/voltage_now"))
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local rate_power = tonumber(helpers.first_line(bstr .. "/power_now"))
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-- energy_now(P)[uWh], charge_now(I)[uAh]
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local energy_now = tonumber(helpers.first_line(bstr .. "/energy_now") or
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helpers.first_line(bstr .. "/charge_now"))
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-- energy_full(P)[uWh], charge_full(I)[uAh]
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local energy_full = tonumber(helpers.first_line(bstr .. "/energy_full") or
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helpers.first_line(bstr .. "/charge_full"))
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local energy_percentage = tonumber(helpers.first_line(bstr .. "/capacity")) or
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math.floor((energy_now / energy_full) * 100)
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bat_now.n_status[i] = helpers.first_line(bstr .. "/status") or "N/A"
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bat_now.n_perc[i] = energy_percentage or bat_now.n_perc[i]
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sum_rate_current = sum_rate_current + (rate_current or 0)
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sum_rate_voltage = sum_rate_voltage + (rate_voltage or 0)
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sum_rate_power = sum_rate_power + (rate_power or 0)
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sum_rate_energy = sum_rate_energy + (rate_power or (((rate_voltage or 0) * (rate_current or 0)) / 1e6))
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sum_energy_now = sum_energy_now + (energy_now or 0)
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sum_energy_full = sum_energy_full + (energy_full or 0)
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end
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end
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-- When one of the battery is charging, others' status are either
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-- "Full", "Unknown" or "Charging". When the laptop is not plugged in,
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-- one or more of the batteries may be full, but only one battery
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-- discharging suffices to set global status to "Discharging".
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bat_now.status = bat_now.n_status[1]
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for _,status in ipairs(bat_now.n_status) do
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if status == "Discharging" or status == "Charging" then
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bat_now.status = status
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end
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end
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bat_now.ac_status = tonumber(helpers.first_line(string.format("%s%s/online", pspath, ac))) or "N/A"
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if bat_now.status ~= "N/A" then
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if bat_now.status ~= "Full" and sum_rate_power == 0 and bat_now.ac_status == 1 then
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bat_now.perc = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100))
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bat_now.time = "00:00"
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bat_now.watt = 0
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-- update {perc,time,watt} iff battery not full and rate > 0
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elseif bat_now.status ~= "Full" then
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local rate_time = 0
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-- Calculate time and watt if rates are greater then 0
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if (sum_rate_power > 0 or sum_rate_current > 0) then
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local div = (sum_rate_power > 0 and sum_rate_power) or sum_rate_current
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if bat_now.status == "Charging" then
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rate_time = (sum_energy_full - sum_energy_now) / div
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else -- Discharging
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rate_time = sum_energy_now / div
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end
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if 0 < rate_time and rate_time < 0.01 then -- check for magnitude discrepancies (#199)
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rate_time_magnitude = math.abs(math.floor(math.log10(rate_time)))
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rate_time = rate_time * 10^(rate_time_magnitude - 2)
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end
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end
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local hours = math.floor(rate_time)
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local minutes = math.floor((rate_time - hours) * 60)
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bat_now.perc = math.floor(math.min(100, (sum_energy_now / sum_energy_full) * 100))
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bat_now.time = string.format("%02d:%02d", hours, minutes)
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bat_now.watt = tonumber(string.format("%.2f", sum_rate_energy / 1e6))
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elseif bat_now.status == "Full" then
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bat_now.perc = 100
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bat_now.time = "00:00"
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bat_now.watt = 0
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end
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end
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widget = bat.widget
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settings()
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-- notifications for critical, low, and full levels
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if notify == "on" then
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if bat_now.status == "Discharging" then
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if tonumber(bat_now.perc) <= n_perc[1] then
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bat.id = naughty.notify({
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preset = bat_notification_critical_preset,
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replaces_id = bat.id
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}).id
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elseif tonumber(bat_now.perc) <= n_perc[2] then
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bat.id = naughty.notify({
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preset = bat_notification_low_preset,
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replaces_id = bat.id
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}).id
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end
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fullnotification = false
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elseif bat_now.status == "Full" and not fullnotification then
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bat.id = naughty.notify({
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preset = bat_notification_charged_preset,
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replaces_id = bat.id
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}).id
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fullnotification = true
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end
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end
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end
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helpers.newtimer("batteries", timeout, bat.update)
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return bat
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end
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return factory
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