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b1b3c4c469
With XDG support so firmly ingrained now, it's about time we stop hard-coding the configuration path in the docs.
83 lines
3.3 KiB
Haskell
83 lines
3.3 KiB
Haskell
{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses #-}
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-----------------------------------------------------------------------------
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-- |
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-- Module : XMonad.Layout.Groups
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-- Description : Modify the description of a layout in a flexible way.
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-- Copyright : Quentin Moser <moserq@gmail.com>
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-- License : BSD-style (see LICENSE)
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--
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-- Maintainer : orphaned
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-- Stability : unstable
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-- Portability : unportable
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--
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-- Layout modifier that can modify the description of its underlying
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-- layout on a (hopefully) flexible way.
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--
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-----------------------------------------------------------------------------
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module XMonad.Layout.Renamed ( -- * Usage
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-- $usage
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renamed
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, named
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, Rename(..) ) where
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import XMonad
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import XMonad.Layout.LayoutModifier
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-- $usage
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-- You can use this module by adding
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--
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-- > import XMonad.Layout.Renamed
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--
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-- to your @xmonad.hs@.
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--
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-- You can then use 'renamed' to modify the description of your
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-- layouts. For example:
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--
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-- > myLayout = renamed [PrependWords "Awesome"] $ tiled ||| Mirror tiled ||| Full
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-- | Apply a list of 'Rename' values to a layout, from left to right.
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renamed :: [Rename a] -> l a -> ModifiedLayout Rename l a
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renamed = ModifiedLayout . Chain
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-- | Rename a layout. (Convenience alias for @renamed [Replace s]@.)
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named :: String -> l a -> ModifiedLayout Rename l a
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named s = renamed [Replace s]
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-- | The available renaming operations
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data Rename a = CutLeft Int -- ^ Remove a number of characters from the left
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| CutRight Int -- ^ Remove a number of characters from the right
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| Append String -- ^ Add a string on the right
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| Prepend String -- ^ Add a string on the left
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| CutWordsLeft Int -- ^ Remove a number of words from the left
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| CutWordsRight Int -- ^ Remove a number of words from the right
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| KeepWordsLeft Int -- ^ Keep a number of words from the left
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| KeepWordsRight Int -- ^ Keep a number of words from the right
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| AppendWords String -- ^ Add a string to the right, prepending a space to it
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-- if necessary
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| PrependWords String -- ^ Add a string to the left, appending a space to it if
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-- necessary
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| Replace String -- ^ Replace with another string
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| Chain [Rename a] -- ^ Apply a list of modifications in left-to-right order
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deriving (Show, Read, Eq)
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apply :: Rename a -> String -> String
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apply (CutLeft i) s = drop i s
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apply (CutRight i) s = take (length s - i) s
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apply (CutWordsLeft i) s = unwords $ drop i $ words s
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apply (CutWordsRight i) s = let ws = words s
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in unwords $ take (length ws - i) ws
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apply (KeepWordsLeft i) s = unwords $ take i $ words s
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apply (KeepWordsRight i) s = let ws = words s
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in unwords $ drop (length ws - i) ws
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apply (Replace s) _ = s
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apply (Append s') s = s ++ s'
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apply (Prepend s') s = s' ++ s
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apply (AppendWords s') s = unwords $ words s ++ [s']
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apply (PrependWords s') s = unwords $ s' : words s
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apply (Chain rs) s = ($ s) $ foldr (flip (.) . apply) id rs
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instance LayoutModifier Rename a where
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modifyDescription r l = apply r (description l)
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