From 3b49df5e2819874296f5b2206edd00cd4a8c21aa Mon Sep 17 00:00:00 2001
From: Jose Antonio Ortega Ruiz <jao@gnu.org>
Date: Sat, 17 Dec 2011 14:56:28 +0100
Subject: Batt improvements: watts display fix and no -c needed

We no longer use -c to specify cases when only _design exists, but try
to detect that automatically (as well as the energy/charge dichotomy).

Also fixed a bug that precluded display of <watts> when no threshold
colours were specified.
---
 src/Plugins/Monitors/Batt.hs | 45 ++++++++++++++++++++++----------------------
 1 file changed, 22 insertions(+), 23 deletions(-)

diff --git a/src/Plugins/Monitors/Batt.hs b/src/Plugins/Monitors/Batt.hs
index 662ff43..f0aaa4a 100644
--- a/src/Plugins/Monitors/Batt.hs
+++ b/src/Plugins/Monitors/Batt.hs
@@ -13,8 +13,6 @@
 --
 -----------------------------------------------------------------------------
 
-{-# LANGUAGE BangPatterns #-}
-
 module Plugins.Monitors.Batt ( battConfig, runBatt, runBatt' ) where
 
 import Control.Exception (SomeException, handle)
@@ -34,7 +32,6 @@ data BattOpts = BattOpts
   , lowThreshold :: Float
   , highThreshold :: Float
   , onlineFile :: FilePath
-  , chargeFile :: FilePath
   }
 
 defaultOpts :: BattOpts
@@ -48,7 +45,6 @@ defaultOpts = BattOpts
   , lowThreshold = -12
   , highThreshold = -10
   , onlineFile = "AC/online"
-  , chargeFile = "charge_full"
   }
 
 options :: [OptDescr (BattOpts -> BattOpts)]
@@ -62,7 +58,6 @@ options =
   , Option "L" ["lowt"] (ReqArg (\x o -> o { lowThreshold = read x }) "") ""
   , Option "H" ["hight"] (ReqArg (\x o -> o { highThreshold = read x }) "") ""
   , Option "f" ["online"] (ReqArg (\x o -> o { onlineFile = x }) "") ""
-  , Option "c" ["charge"] (ReqArg (\x o -> o { chargeFile = x }) "") ""
   ]
 
 parseOpts :: [String] -> IO BattOpts
@@ -95,25 +90,28 @@ data Battery = Battery
   , current :: !Float
   }
 
-safeFileExist :: String -> IO Bool
-safeFileExist f = handle noErrors $ fileExist f
+safeFileExist :: String -> String -> IO Bool
+safeFileExist d f = handle noErrors $ fileExist (d </> f)
   where noErrors = const (return False) :: SomeException -> IO Bool
 
-batteryFiles :: String -> String -> IO Files
-batteryFiles charge_file bat =
-  do is_charge <- safeFileExist $ prefix </> "charge_now"
-     is_energy <- safeFileExist $ prefix </> "energy_now"
-     is_current <- safeFileExist $ prefix </> "current_now"
+batteryFiles :: String -> IO Files
+batteryFiles bat =
+  do is_charge <- exists "charge_now"
+     is_energy <- if is_charge then return False else exists "energy_now"
+     is_current <- exists "current_now"
+     plain <- if is_charge then exists "charge_full" else exists "energy_full"
      let cf = if is_current then "current_now" else "power_now"
+         sf = if plain then "" else "_design"
      return $ case (is_charge, is_energy) of
-       (True, _) -> files "charge" cf
-       (_, True) -> files "energy" cf
+       (True, _) -> files "charge" cf sf
+       (_, True) -> files "energy" cf sf
        _ -> NoFiles
   where prefix = sysDir </> bat
-        files ch cf = Files { fFull = prefix </> charge_file
-                            , fNow = prefix </> ch ++ "_now"
-                            , fCurrent = prefix </> cf
-                            , fVoltage = prefix </> "voltage_now" }
+        exists = safeFileExist prefix
+        files ch cf sf = Files { fFull = prefix </> ch ++ "_full" ++ sf
+                               , fNow = prefix </> ch ++ "_now"
+                               , fCurrent = prefix </> cf
+                               , fVoltage = prefix </> "voltage_now" }
 
 haveAc :: FilePath -> IO Bool
 haveAc f =
@@ -130,7 +128,7 @@ readBattery files =
        return $ Battery (3600 * a / 1000000) -- wattseconds
                         (3600 * b / 1000000) -- wattseconds
                         (c / 1000000) -- volts
-                        (if c > 0 then (d / c) else -1) -- amperes
+                        (if c > 0 then d / c else -1) -- amperes
     where grab f = handle onError $ withFile f ReadMode (fmap read . hGetLine)
           onError = const (return (-1)) :: SomeException -> IO Float
 
@@ -154,24 +152,25 @@ runBatt = runBatt' ["BAT0","BAT1","BAT2"]
 runBatt' :: [String] -> [String] -> Monitor String
 runBatt' bfs args = do
   opts <- io $ parseOpts args
-  c <- io $ readBatteries opts =<< mapM (batteryFiles (chargeFile opts)) bfs
+  c <- io $ readBatteries opts =<< mapM batteryFiles bfs
+  suffix <- getConfigValue useSuffix
   case c of
     Result x w t s ->
       do l <- fmtPercent x
-         parseTemplate (l ++ s:[fmtTime $ floor t, fmtWatts w opts])
+         parseTemplate (l ++ s:[fmtTime $ floor t, fmtWatts w opts suffix])
     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"
+        fmtWatts x o s = color x o $ showDigits 1 x ++ (if s then "W" else "")
         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 Nothing str = str
         maybeColor (Just c) str = "<fc=" ++ c ++ ">" ++ str ++ "</fc>"
         color x o | x >= 0 = maybeColor (posColor o)
                   | x >= highThreshold o = maybeColor (highWColor o)
-- 
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