79 lines
2.3 KiB
Lua
79 lines
2.3 KiB
Lua
---------------------------------------------------
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-- Licensed under the GNU General Public License v2
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-- * (c) 2010, Adrian C. <anrxc@sysphere.org>
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---------------------------------------------------
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-- {{{ Grab environment
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local tonumber = tonumber
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local setmetatable = setmetatable
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local string = { format = string.format }
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local helpers = require("vicious.helpers")
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local math = {
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min = math.min,
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floor = math.floor
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}
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-- }}}
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-- Batsys: provides state, charge, and remaining time for a requested battery
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module("vicious.bat")
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-- {{{ Battery widget type
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local function worker(format, batid)
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local battery = helpers.pathtotable("/sys/class/power_supply/" .. batid)
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local battery_state = {
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["Full\n"] = "↯",
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["Unknown\n"] = "⌁",
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["Charged\n"] = "↯",
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["Charging\n"] = "+",
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["Discharging\n"] = "-"
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}
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-- Check if the battery is present
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if not battery.present == "1\n" then
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return {battery_state["Unknown\n"], 0, "N/A"}
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end
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-- Get state information
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local state = battery_state[battery.status] or battery_state["Unknown\n"]
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-- Get capacity information
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if battery.charge_now then
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remaining, capacity = battery.charge_now, battery.charge_full
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elseif battery.energy_now then
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remaining, capacity = battery.energy_now, battery.energy_full
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else
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return {battery_state["Unknown\n"], 0, "N/A"}
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end
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-- Calculate percentage (but work around broken BAT/ACPI implementations)
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local percent = math.min(math.floor(remaining / capacity * 100), 100)
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-- Get charge information
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if battery.current_now then
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rate = battery.current_now
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else -- Todo: other rate sources, as with capacity?
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return {state, percent, "N/A"}
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end
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-- Calculate remaining (charging or discharging) time
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if state == "+" then
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timeleft = (tonumber(capacity) - tonumber(remaining)) / tonumber(rate)
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elseif state == "-" then
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timeleft = tonumber(remaining) / tonumber(rate)
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else
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return {state, percent, "N/A"}
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end
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local hoursleft = math.floor(timeleft)
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local minutesleft = math.floor((timeleft - hoursleft) * 60 )
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local time = string.format("%02d:%02d", hoursleft, minutesleft)
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return {state, percent, time}
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end
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-- }}}
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setmetatable(_M, { __call = function(_, ...) return worker(...) end })
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