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|
{-# LANGUAGE CPP #-}
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Mail
-- Copyright : (c) Spencer Janssen
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Spencer Janssen <sjanssen@cse.unl.edu>
-- Stability : unstable
-- Portability : unportable
--
-- A plugin for checking mail.
--
-----------------------------------------------------------------------------
module Xmobar.Plugins.Mail(Mail(..),MailX(..)) where
import Xmobar.Run.Exec
#ifdef INOTIFY
import Xmobar.System.Utils (expandHome, changeLoop)
import Control.Monad
import Control.Concurrent.STM
import System.Directory
import System.FilePath
import System.INotify
import System.Console.GetOpt
import Data.List (isPrefixOf)
import Data.Set (Set)
import qualified Data.Set as S
#if MIN_VERSION_hinotify(0,3,10)
import qualified Data.ByteString.Char8 as BS (ByteString, pack, unpack)
unpack :: BS.ByteString -> String
unpack = BS.unpack
pack :: String -> BS.ByteString
pack = BS.pack
#else
unpack :: String -> String
unpack = id
pack :: String -> String
pack = id
#endif
#else
import System.IO
#endif
data MOptions = MOptions
{ oDir :: FilePath
, oPrefix :: String
, oSuffix :: String
}
defaults :: MOptions
defaults = MOptions {oDir = "", oPrefix = "", oSuffix = ""}
options :: [OptDescr (MOptions -> MOptions)]
options =
[ Option "d" ["dir"] (ReqArg (\x o -> o { oDir = x }) "") ""
, Option "p" ["prefix"] (ReqArg (\x o -> o { oPrefix = x }) "") ""
, Option "s" ["suffix"] (ReqArg (\x o -> o { oSuffix = x }) "") ""
]
parseOptions :: [String] -> IO MOptions
parseOptions args =
case getOpt Permute options args of
(o, _, []) -> return $ foldr id defaults o
(_, _, errs) -> ioError . userError $ concat errs
-- | A list of mail box names and paths to maildirs.
data Mail = Mail [(String, FilePath)] String
deriving (Read, Show)
-- | A list of mail box names, paths to maildirs and display colors.
data MailX = MailX [(String, FilePath, String)] [String] String
deriving (Read, Show)
instance Exec Mail where
alias (Mail _ a) = a
start (Mail ms a) = start (MailX (map (\(n,p) -> (n,p,"")) ms) [] a)
instance Exec MailX where
alias (MailX _ _ a) = a
#ifndef INOTIFY
start _ _ =
hPutStrLn stderr $ "Warning: xmobar is not compiled with -fwith_inotify,"
++ " but the Mail plugin requires it."
#else
start (MailX ms args _) cb = do
vs <- mapM (const $ newTVarIO S.empty) ms
opts <- parseOptions args
let prefix = oPrefix opts
suffix = oSuffix opts
dir = oDir opts
ps = map (\(_,p,_) -> if null dir then p else dir </> p) ms
rs = map (</> "new") ps
ev = [Move, MoveIn, MoveOut, Create, Delete]
ds <- mapM expandHome rs
i <- initINotify
zipWithM_ (\d v -> addWatch i ev d (handle v)) (map pack ds) vs
forM_ (zip ds vs) $ \(d, v) -> do
s <- fmap (S.fromList . filter (not . isPrefixOf "."))
$ getDirectoryContents d
atomically $ modifyTVar v (S.union s)
changeLoop (mapM (fmap S.size . readTVar) vs) $ \ns ->
let showmbx m n c = if c == ""
then m ++ show n
else "<fc=" ++ c ++ ">" ++ m ++ show n ++ "</fc>"
cnts = [showmbx m n c | ((m,_,c), n) <- zip ms ns , n /= 0 ]
in cb $ if null cnts then "" else prefix ++ unwords cnts ++ suffix
handle :: TVar (Set String) -> Event -> IO ()
handle v e = atomically $ modifyTVar v $ case e of
Created {} -> create
MovedIn {} -> create
Deleted {} -> delete
MovedOut {} -> delete
_ -> id
where
delete = S.delete ((unpack . filePath) e)
create = S.insert ((unpack . filePath) e)
#endif
|
