87 lines
2.5 KiB
Lua
87 lines
2.5 KiB
Lua
---------------------------------------------------
|
|
-- Licensed under the GNU General Public License v2
|
|
-- * (c) 2010, Adrian C. <anrxc@sysphere.org>
|
|
---------------------------------------------------
|
|
|
|
-- {{{ Grab environment
|
|
local tonumber = tonumber
|
|
local io = { open = io.open }
|
|
local setmetatable = setmetatable
|
|
local math = {
|
|
min = math.min,
|
|
floor = math.floor
|
|
}
|
|
local string = {
|
|
find = string.find,
|
|
match = string.match,
|
|
format = string.format
|
|
}
|
|
-- }}}
|
|
|
|
|
|
-- Batproc: provides state, charge, and remaining time for a requested battery using procfs
|
|
-- vicious.contrib.batproc
|
|
local batproc = {}
|
|
|
|
|
|
-- {{{ Battery widget type
|
|
local function worker(format, batid)
|
|
local battery_state = {
|
|
["full"] = "↯",
|
|
["unknown"] = "⌁",
|
|
["charged"] = "↯",
|
|
["charging"] = "+",
|
|
["discharging"] = "-"
|
|
}
|
|
|
|
-- Get /proc/acpi/battery info
|
|
local f = io.open("/proc/acpi/battery/"..batid.."/info")
|
|
-- Handler for incompetent users
|
|
if not f then return {battery_state["unknown"], 0, "N/A"} end
|
|
local infofile = f:read("*all")
|
|
f:close()
|
|
|
|
-- Check if the battery is present
|
|
if infofile == nil or string.find(infofile, "present:[%s]+no") then
|
|
return {battery_state["unknown"], 0, "N/A"}
|
|
end
|
|
|
|
-- Get capacity information
|
|
local capacity = string.match(infofile, "last full capacity:[%s]+([%d]+).*")
|
|
|
|
|
|
-- Get /proc/acpi/battery state
|
|
local f = io.open("/proc/acpi/battery/"..batid.."/state")
|
|
local statefile = f:read("*all")
|
|
f:close()
|
|
|
|
-- Get state information
|
|
local state = string.match(statefile, "charging state:[%s]+([%a]+).*")
|
|
local state = battery_state[state] or battery_state["unknown"]
|
|
|
|
-- Get charge information
|
|
local rate = string.match(statefile, "present rate:[%s]+([%d]+).*")
|
|
local remaining = string.match(statefile, "remaining capacity:[%s]+([%d]+).*")
|
|
|
|
|
|
-- Calculate percentage (but work around broken BAT/ACPI implementations)
|
|
local percent = math.min(math.floor(remaining / capacity * 100), 100)
|
|
|
|
-- Calculate remaining (charging or discharging) time
|
|
if state == "+" then
|
|
timeleft = (tonumber(capacity) - tonumber(remaining)) / tonumber(rate)
|
|
elseif state == "-" then
|
|
timeleft = tonumber(remaining) / tonumber(rate)
|
|
else
|
|
return {state, percent, "N/A"}
|
|
end
|
|
local hoursleft = math.floor(timeleft)
|
|
local minutesleft = math.floor((timeleft - hoursleft) * 60 )
|
|
local time = string.format("%02d:%02d", hoursleft, minutesleft)
|
|
|
|
return {state, percent, time}
|
|
end
|
|
-- }}}
|
|
|
|
return setmetatable(batproc, { __call = function(_, ...) return worker(...) end })
|