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-----------------------------------------------------------------------------
-- |
-- Module : XMonadContrib.ShellPrompt
-- Copyright : (C) 2007 Andrea Rossato
-- License : BSD3
--
-- Maintainer : andrea.rossato@unibz.it
-- Stability : unstable
-- Portability : unportable
--
-- A shell prompt for XMonad
--
-----------------------------------------------------------------------------
module XMonadContrib.ShellPrompt (
-- * Usage
-- $usage
shellPrompt
, getShellCompl
, split
, prompt
, safePrompt
) where
import System.Environment
import Control.Monad
import Data.List
import System.Directory
import System.IO
import XMonadContrib.Run
import XMonad
import XMonadContrib.XPrompt
-- $usage
--
-- 1. In Config.hs add:
--
-- > import XMonadContrib.XPrompt
-- > import XMonadContrib.ShellPrompt
--
-- 2. In your keybindings add something like:
--
-- > , ((modMask .|. controlMask, xK_x), shellPrompt defaultXPConfig)
--
-- %import XMonadContrib.XPrompt
-- %import XMonadContrib.ShellPrompt
-- %keybind , ((modMask .|. controlMask, xK_x), shellPrompt defaultXPConfig)
data Shell = Shell
instance XPrompt Shell where
showXPrompt Shell = "Run: "
shellPrompt :: XPConfig -> X ()
shellPrompt c = do
cmds <- io $ getCommands
mkXPrompt Shell c (getShellCompl cmds) spawn
-- | See safe and unsafeSpawn. prompt is an alias for safePrompt;
-- safePrompt and unsafePrompt work on the same principles, but will use
-- XPrompt to interactively query the user for input; the appearance is
-- set by passing an XPConfig as the second argument. The first argument
-- is the program to be run with the interactive input.
-- You would use these like this:
--
-- > , ((modMask, xK_b ), safePrompt "firefox" greenXPConfig)
-- > , ((modMask .|. shiftMask, xK_c ), prompt ("xterm" ++ " -e") greenXPConfig)
--
-- Note that you want to use safePrompt for Firefox input, as Firefox
-- wants URLs, and unsafePrompt for the XTerm example because this allows
-- you to easily start a terminal executing an arbitrary command, like
-- 'top'.
prompt, unsafePrompt, safePrompt :: FilePath -> XPConfig -> X ()
prompt = unsafePrompt
safePrompt c config = mkXPrompt Shell config (getShellCompl [c]) run
where run = safeSpawn c
unsafePrompt c config = mkXPrompt Shell config (getShellCompl [c]) run
where run a = unsafeSpawn $ c ++ " " ++ a
getShellCompl :: [String] -> String -> IO [String]
getShellCompl cmds s | s == "" || last s == ' ' = return []
| otherwise = do
f <- fmap lines $ runProcessWithInput "bash" [] ("compgen -A file " ++ s ++ "\n")
return . map escape . uniqSort $ f ++ commandCompletionFunction cmds s
commandCompletionFunction :: [String] -> String -> [String]
commandCompletionFunction cmds str | '/' `elem` str = []
| otherwise = filter (isPrefixOf str) cmds
getCommands :: IO [String]
getCommands = do
p <- getEnv "PATH" `catch` const (return [])
let ds = split ':' p
fp d f = d ++ "/" ++ f
es <- forM ds $ \d -> do
exists <- doesDirectoryExist d
if exists
then getDirectoryContents d >>= filterM (isExecutable . fp d)
else return []
return . uniqSort . concat $ es
isExecutable :: FilePath ->IO Bool
isExecutable f = do
fe <- doesFileExist f
if fe
then fmap executable $ getPermissions f
else return False
split :: Eq a => a -> [a] -> [[a]]
split _ [] = []
split e l =
f : split e (rest ls)
where
(f,ls) = span (/=e) l
rest s | s == [] = []
| otherwise = tail s
escape :: String -> String
escape [] = ""
escape (' ':xs) = "\\ " ++ escape xs
escape (x:xs)
| isSpecialChar x = '\\' : x : escape xs
| otherwise = x : escape xs
isSpecialChar :: Char -> Bool
isSpecialChar = flip elem "\\@\"'#?$*()[]{};"
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