Add BatteryP a monitor for batteries

With this monitor is possible to set specific location where to
retrieve battery information.

For example:
Run BatteryP ["BAT0","BAT1","BAT2"] [] 10

this will read the following files:
/proc/acpi/battery/BAT0/info and /proc/acpi/battery/BAT0/state
/proc/acpi/battery/BAT1/info and /proc/acpi/battery/BAT1/state
/proc/acpi/battery/BAT1/info and /proc/acpi/battery/BAT2/state

darcs-hash:20080316160115-d6583-efd35abf7a6a1a40fcb5f97ec430783f40b3221d.gz

1 files changed, 18 insertions, 23 deletions

diff --git a/Plugins/Monitors/Batt.hs b/Plugins/Monitors/Batt.hs
index 6a7a858..af5a48c 100644
--- a/Plugins/Monitors/Batt.hs
+++ b/Plugins/Monitors/Batt.hs
@@ -3,7 +3,7 @@
 -- Module      :  Plugins.Monitors.Batt
 -- Copyright   :  (c) Andrea Rossato
 -- License     :  BSD-style (see LICENSE)
--- 
+--
 -- Maintainer  :  Andrea Rossato <andrea.rossato@unibz.it>
 -- Stability   :  unstable
 -- Portability :  unportable
@@ -18,7 +18,7 @@ import qualified Data.ByteString.Lazy.Char8 as B
 import Plugins.Monitors.Common
 import System.Posix.Files (fileExist)
 
-data Batt = Batt Float 
+data Batt = Batt Float
           | NA
 
 battConfig :: IO MConfig
@@ -26,17 +26,11 @@ battConfig = mkMConfig
        "Batt: <left>" -- template
        ["left"]       -- available replacements
 
-fileB0 :: (String, String)
-fileB0 = ("/proc/acpi/battery/BAT0/info", "/proc/acpi/battery/BAT0/state")
-
-fileB1 :: (String, String)
-fileB1 = ("/proc/acpi/battery/BAT1/info", "/proc/acpi/battery/BAT1/state")
-
-fileB2 :: (String, String)
-fileB2 = ("/proc/acpi/battery/BAT2/info", "/proc/acpi/battery/BAT2/state")
+file2batfile :: String -> (String, String)
+file2batfile s = ("/proc/acpi/battery/"++ s ++ "/info", "/proc/acpi/battery/"++ s ++ "/state")
 
 readFileBatt :: (String, String) -> IO (B.ByteString, B.ByteString)
-readFileBatt (i,s) = 
+readFileBatt (i,s) =
     do a <- rf i
        b <- rf s
        return (a,b)
@@ -44,11 +38,9 @@ readFileBatt (i,s) =
             f <- fileExist file
             if f then B.readFile file else return B.empty
 
-parseBATT :: IO Batt
-parseBATT =
-    do (a0,b0) <- readFileBatt fileB0
-       (a1,b1) <- readFileBatt fileB1
-       (a2,b2) <- readFileBatt fileB2
+parseBATT :: [(String, String)] -> IO Batt
+parseBATT bfs =
+    do [(a0,b0),(a1,b1),(a2,b2)] <- mapM readFileBatt (take 3 $ bfs ++ repeat ("",""))
        let sp p s = case stringParser p s of
                       [] -> 0
                       x -> read x
@@ -58,16 +50,19 @@ parseBATT =
            left = (p0 + p1 + p2) / (f0 + f1 + f2) --present / full
        return $ if isNaN left then NA else Batt left
 
-formatBatt :: Float -> Monitor [String] 
+formatBatt :: Float -> Monitor [String]
 formatBatt x =
     do let f s = floatToPercent (s / 100)
        l <- showWithColors f (x * 100)
        return [l]
 
 runBatt :: [String] -> Monitor String
-runBatt _ =
-    do c <- io $ parseBATT
-       case c of
-         Batt x -> do l <- formatBatt x
-                      parseTemplate l 
-         NA -> return "N/A"
+runBatt = runBatt' ["BAT0","BAT1","BAT2"]
+
+runBatt' :: [String] -> [String] -> Monitor String
+runBatt' bfs _ = do
+  c <- io $ parseBATT (map file2batfile bfs)
+  case c of
+    Batt x -> do l <- formatBatt x
+                 parseTemplate l
+    NA -> return "N/A"