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{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE PatternGuards #-}
{-# LANGUAGE TypeSynonymInstances #-}
{-# LANGUAGE UnicodeSyntax #-}
module XMonad.Layout.TopicDir (
-- * Usage
-- $usage
topicDir,
changeDir,
TopicDir,
) where
import Control.Exception
import qualified Data.Map as M
import System.Directory (getCurrentDirectory,
setCurrentDirectory)
import XMonad hiding (focus)
import XMonad.Layout.LayoutModifier
import XMonad.Prompt (XPConfig)
import XMonad.Prompt.Directory (directoryPrompt)
import XMonad.StackSet (currentTag, tag)
import XMonad.Util.Run (runProcessWithInput)
econst ∷ Monad m ⇒ a → IOException → m a
econst = const . return
newtype Chdir = Chdir String deriving ( Typeable )
instance Message Chdir
newtype 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 ∷ 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)
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