86 lines
2.6 KiB
Lua
86 lines
2.6 KiB
Lua
---------------------------------------------------
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-- Licensed under the GNU General Public License v2
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-- * (c) 2009, 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 io = { open = io.open }
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local setmetatable = setmetatable
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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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local string = {
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find = string.find,
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match = string.match,
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format = string.format
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}
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-- }}}
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-- Batproc: provides state, charge, and remaining time for a requested battery using procfs
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module("vicious.widgets.batproc")
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-- {{{ Battery widget type
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local function worker(format, batid)
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local battery_state = {
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["full"] = "↯",
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["unknown"] = "⌁",
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["charged"] = "↯",
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["charging"] = "+",
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["discharging"] = "-"
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}
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-- Get /proc/acpi/battery info
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local f = io.open("/proc/acpi/battery/"..batid.."/info")
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-- Handler for incompetent users
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if not f then return {battery_state["unknown"], 0, "N/A"} end
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local infofile = f:read("*all")
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f:close()
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-- Check if the battery is present
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if infofile == nil or string.find(infofile, "present:[%s]+no") then
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return {battery_state["unknown"], 0, "N/A"}
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end
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-- Get capacity information
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local capacity = string.match(infofile, "last full capacity:[%s]+([%d]+).*")
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-- Get /proc/acpi/battery state
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local f = io.open("/proc/acpi/battery/"..batid.."/state")
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local statefile = f:read("*all")
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f:close()
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-- Get state information
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local state = string.match(statefile, "charging state:[%s]+([%a]+).*")
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local state = battery_state[state] or battery_state["unknown"]
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-- Get charge information
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local rate = string.match(statefile, "present rate:[%s]+([%d]+).*")
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local remaining = string.match(statefile, "remaining capacity:[%s]+([%d]+).*")
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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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-- 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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