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{-# LANGUAGE DeriveDataTypeable, FlexibleInstances, MultiParamTypeClasses, TypeSynonymInstances, PatternGuards #-}
module XMonad.Layout.TopicDir (
-- * Usage
-- $usage
topicDir,
changeDir,
TopicDir,
) where
import qualified Data.Map as M
import Control.Exception
import System.Directory (setCurrentDirectory, getCurrentDirectory)
import XMonad hiding (focus)
import XMonad.Util.Run (runProcessWithInput)
import XMonad.Prompt (XPConfig)
import XMonad.Prompt.Directory (directoryPrompt)
import XMonad.Layout.LayoutModifier
import XMonad.StackSet (tag, currentTag)
econst :: Monad m => a -> IOException -> m a
econst = const . return
data Chdir = Chdir String deriving ( Typeable )
instance Message Chdir
data TopicDir a = TopicDir (M.Map WorkspaceId String, String)
deriving (Read, Show)
instance LayoutModifier TopicDir Window where
modifyLayout (TopicDir (tds, d)) w r = do
tc <- gets (currentTag.windowset)
case mdir tc of
(Just dir) -> scd dir
Nothing -> return ()
runLayout w r
where
mdir :: WorkspaceId -> Maybe String
mdir tc | tc == tag w && d == "" = M.lookup tc tds
| tc == tag w = Just d
| otherwise = Nothing
handleMess (TopicDir (dds, _)) m
| Just (Chdir wd) <- fromMessage m = do
wd' <- cleanDir wd
return $ Just $ TopicDir (dds, wd')
| otherwise = return Nothing
topicDir :: LayoutClass l a => M.Map WorkspaceId String
-> l a -> ModifiedLayout TopicDir l a
topicDir m = ModifiedLayout (TopicDir (m, ""))
cleanDir :: String -> X String
cleanDir x = scd x >> io getCurrentDirectory
scd :: String -> X ()
scd x = do
x' <- io (runProcessWithInput "bash" [] ("echo -n " ++ x) `catch` econst x)
catchIO $ setCurrentDirectory x'
changeDir :: XPConfig -> X ()
changeDir c = directoryPrompt c "Set working directory: " (sendMessage . Chdir)
|
