diff options
Diffstat (limited to 'src/Plugins/Monitors/Batt.hs')
| -rw-r--r-- | src/Plugins/Monitors/Batt.hs | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/src/Plugins/Monitors/Batt.hs b/src/Plugins/Monitors/Batt.hs new file mode 100644 index 0000000..11b2d6c --- /dev/null +++ b/src/Plugins/Monitors/Batt.hs @@ -0,0 +1,165 @@ +----------------------------------------------------------------------------- +-- | +-- Module : Plugins.Monitors.Batt +-- Copyright : (c) Andrea Rossato, 2010 Petr Rockai, 2010 Jose A Ortega +-- License : BSD-style (see LICENSE) +-- +-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org> +-- Stability : unstable +-- Portability : unportable +-- +-- A battery monitor for Xmobar +-- +----------------------------------------------------------------------------- + +module Plugins.Monitors.Batt ( battConfig, runBatt, runBatt' ) where + +import qualified Data.ByteString.Lazy.Char8 as B +import Plugins.Monitors.Common +import System.Posix.Files (fileExist) +import System.Console.GetOpt + +data BattOpts = BattOpts + { onString :: String + , offString :: String + , posColor :: Maybe String + , lowWColor :: Maybe String + , mediumWColor :: Maybe String + , highWColor :: Maybe String + , lowThreshold :: Float + , highThreshold :: Float + } + +defaultOpts :: BattOpts +defaultOpts = BattOpts + { onString = "On" + , offString = "Off" + , posColor = Nothing + , lowWColor = Nothing + , mediumWColor = Nothing + , highWColor = Nothing + , lowThreshold = -12 + , highThreshold = -10 + } + +options :: [OptDescr (BattOpts -> BattOpts)] +options = + [ Option "O" ["on"] (ReqArg (\x o -> o { onString = x }) "") "" + , Option "o" ["off"] (ReqArg (\x o -> o { offString = x }) "") "" + , Option "p" ["positive"] (ReqArg (\x o -> o { posColor = Just x }) "") "" + , Option "l" ["low"] (ReqArg (\x o -> o { lowWColor = Just x }) "") "" + , Option "m" ["medium"] (ReqArg (\x o -> o { mediumWColor = Just x }) "") "" + , Option "h" ["high"] (ReqArg (\x o -> o { highWColor = Just x }) "") "" + , Option "L" ["lowt"] (ReqArg (\x o -> o { lowThreshold = read x }) "") "" + , Option "H" ["hight"] (ReqArg (\x o -> o { highThreshold = read x }) "") "" + ] + +parseOpts :: [String] -> IO BattOpts +parseOpts argv = + case getOpt Permute options argv of + (o, _, []) -> return $ foldr id defaultOpts o + (_, _, errs) -> ioError . userError $ concat errs + +data Result = Result Float Float Float String | NA + +base :: String +base = "/sys/class/power_supply" + +battConfig :: IO MConfig +battConfig = mkMConfig + "Batt: <watts>, <left>% / <timeleft>" -- template + ["leftbar", "left", "acstatus", "timeleft", "watts"] -- replacements + +data Files = Files + { f_full :: String + , f_now :: String + , f_voltage :: String + , f_current :: String + } | NoFiles + +data Battery = Battery + { full :: Float + , now :: Float + , voltage :: Float + , current :: Float + } + +batteryFiles :: String -> IO Files +batteryFiles bat = + do is_charge <- fileExist $ prefix ++ "/charge_now" + is_energy <- fileExist $ prefix ++ "/energy_now" + return $ case (is_charge, is_energy) of + (True, _) -> files "/charge" + (_, True) -> files "/energy" + _ -> NoFiles + where prefix = base ++ "/" ++ bat + files ch = Files { f_full = prefix ++ ch ++ "_full" + , f_now = prefix ++ ch ++ "_now" + , f_current = prefix ++ "/current_now" + , f_voltage = prefix ++ "/voltage_now" } + +haveAc :: IO (Maybe Bool) +haveAc = do know <- fileExist $ base ++ "/AC/online" + if know + then do s <- B.unpack `fmap` catRead (base ++ "/AC/online") + return $ Just $ s == "1\n" + else return Nothing + +readBattery :: Files -> IO Battery +readBattery NoFiles = return $ Battery 0 0 0 0 +readBattery files = + do a <- grab $ f_full files -- microwatthours + b <- grab $ f_now files + c <- grab $ f_voltage files -- microvolts + d <- grab $ f_current files -- microwatts (huh!) + return $ Battery (3600 * a / 1000000) -- wattseconds + (3600 * b / 1000000) -- wattseconds + (c / 1000000) -- volts + (d / c) -- amperes + where grab = fmap (read . B.unpack) . catRead + +readBatteries :: BattOpts -> [Files] -> IO Result +readBatteries opts bfs = + do bats <- mapM readBattery (take 3 bfs) + ac' <- haveAc + let ac = (ac' == Just True) + sign = if ac then 1 else -1 + left = sum (map now bats) / sum (map full bats) + watts = sign * sum (map voltage bats) * sum (map current bats) + time = if watts == 0 then 0 else sum $ map time' bats -- negate sign + time' b = (if ac then full b - now b else now b) / (sign * watts) + acstr = case ac' of + Nothing -> "?" + Just True -> onString opts + Just False -> offString opts + return $ if isNaN left then NA else Result left watts time acstr + +runBatt :: [String] -> Monitor String +runBatt = runBatt' ["BAT0","BAT1","BAT2"] + +runBatt' :: [String] -> [String] -> Monitor String +runBatt' bfs args = do + opts <- io $ parseOpts args + c <- io $ readBatteries opts =<< mapM batteryFiles bfs + case c of + Result x w t s -> + do l <- fmtPercent x + parseTemplate (l ++ s:[fmtTime $ floor t, fmtWatts w opts]) + NA -> return "N/A" + where fmtPercent :: Float -> Monitor [String] + fmtPercent x = do + p <- showPercentWithColors x + b <- showPercentBar (100 * x) x + return [b, p] + fmtWatts x o = color x o $ showDigits 1 x ++ "W" + fmtTime :: Integer -> String + fmtTime x = hours ++ ":" ++ if length minutes == 2 + then minutes else '0' : minutes + where hours = show (x `div` 3600) + minutes = show ((x `mod` 3600) `div` 60) + maybeColor Nothing _ = "" + maybeColor (Just c) str = "<fc=" ++ c ++ ">" ++ str ++ "</fc>" + color x o | x >= 0 = maybeColor (posColor o) + | x >= highThreshold o = maybeColor (highWColor o) + | x >= lowThreshold o = maybeColor (mediumWColor o) + | otherwise = maybeColor (lowWColor o) |