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92ef6cd811
Bash's compgen is used for this (like in ShellPrompt.hs). Enable all GHC warnings. Improve documentation (slightly).
108 lines
3.3 KiB
Haskell
108 lines
3.3 KiB
Haskell
{-# OPTIONS_GHC -Wall #-}
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-----------------------------------------------------------------------------
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-- |
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-- Module : XMonadContrib.ManPrompt
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-- Copyright : (c) 2007 Valery V. Vorotyntsev
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-- License : BSD3-style (see LICENSE)
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--
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-- Maintainer : valery.vv@gmail.com
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-- Stability : unstable
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-- Portability : non-portable (uses \"manpath\" and \"bash\")
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--
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-- A manual page prompt for XMonad window manager.
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--
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-- TODO
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--
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-- * narrow completions by section number, if the one is specified
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-- (like @\/etc\/bash_completion@ does)
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--
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-- * test with QuickCheck
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-----------------------------------------------------------------------------
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module XMonadContrib.ManPrompt (
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-- * Usage
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-- $usage
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manPrompt
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, getCommandOutput
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) where
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import XMonad
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import XMonadContrib.XPrompt
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import XMonadContrib.Run
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import XMonadContrib.ShellPrompt (split)
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import System.Directory
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import System.Process
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import System.IO
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import qualified Control.Exception as E
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import Control.Monad
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import Data.List
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import Data.Maybe
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-- $usage
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-- 1. In Config.hs add:
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--
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-- > import XMonadContrib.ManPrompt
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--
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-- 2. In your keybindings add something like:
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--
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-- > , ((modMask, xK_F1), manPrompt defaultXPConfig) -- mod-f1 %! Query for manual page to be displayed
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-- %import XMonadContrib.XPrompt
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-- %import XMonadContrib.ManPrompt
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-- %keybind , ((modMask, xK_F1), manPrompt defaultXPConfig)
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data Man = Man
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instance XPrompt Man where
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showXPrompt Man = "Manual page: "
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-- | Query for manual page to be displayed.
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manPrompt :: XPConfig -> X ()
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manPrompt c = mkXPrompt Man c manCompl $ runInTerm . (++) "man "
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manCompl :: String -> IO [String]
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manCompl str | '/' `elem` str = do
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-- XXX It may be better to use readline instead of bash's compgen...
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lines `fmap` getCommandOutput ("bash -c 'compgen -A file " ++ str ++ "'")
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| otherwise = do
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mp <- getCommandOutput "manpath -g 2>/dev/null" `E.catch` \_ -> return []
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let sects = ["man" ++ show n | n <- [1..9 :: Int]]
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dirs = [d ++ "/" ++ s | d <- split ':' mp, s <- sects]
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stripExt = reverse . drop 1 . dropWhile (/= '.') . reverse
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mans <- forM dirs $ \d -> do
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exists <- doesDirectoryExist d
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if exists
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then map (stripExt . stripSuffixes [".gz", ".bz2"]) `fmap`
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getDirectoryContents d
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else return []
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mkComplFunFromList (uniqSort $ concat mans) str
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-- | Run a command using shell and return its output.
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--
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-- XXX merge with 'Run.runProcessWithInput'?
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--
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-- * update documentation of the latter (there is no 'Maybe' in result)
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--
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-- * ask \"gurus\" whether @evaluate (length ...)@ approach is
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-- better\/more idiomatic
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getCommandOutput :: String -> IO String
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getCommandOutput s = do
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(pin, pout, perr, ph) <- runInteractiveCommand s
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hClose pin
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output <- hGetContents pout
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E.evaluate (length output)
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hClose perr
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waitForProcess ph
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return output
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stripSuffixes :: Eq a => [[a]] -> [a] -> [a]
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stripSuffixes sufs fn =
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head . catMaybes $ map (flip rstrip fn) sufs ++ [Just fn]
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rstrip :: Eq a => [a] -> [a] -> Maybe [a]
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rstrip suf lst
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| suf `isSuffixOf` lst = Just $ take (length lst - length suf) lst
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| otherwise = Nothing
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