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f732082fdc
Typeable has been automatically derived for every type since GHC 7.10,
so remove these obsolete derivations. This also allows us to get rid of
the `DeriveDataTypeable` pragma quite naturally.
Related: https://github.com/xmonad/xmonad/pull/299 (xmonad/xmonad@9e5b16ed8a)
Related: bd5b969d9b
Fixes: https://github.com/xmonad/xmonad-contrib/issues/548
60 lines
1.9 KiB
Haskell
60 lines
1.9 KiB
Haskell
-----------------------------------------------------------------------------
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-- |
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-- Module : XMonad.Actions.FocusNth
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-- Copyright : (c) Karsten Schoelzel <kuser@gmx.de>
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-- License : BSD
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--
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-- Maintainer : Karsten Schoelzel <kuser@gmx.de>
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-- Stability : stable
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-- Portability : unportable
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--
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-- Focus the nth window of the current workspace.
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-----------------------------------------------------------------------------
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module XMonad.Actions.FocusNth (
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-- * Usage
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-- $usage
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focusNth,focusNth',
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swapNth,swapNth') where
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import XMonad.StackSet
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import XMonad
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-- $usage
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-- Add the import to your @~\/.xmonad\/xmonad.hs@:
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--
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-- > import XMonad.Actions.FocusNth
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--
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-- Then add appropriate keybindings, for example:
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--
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-- > -- mod4-[1..9] @@ Switch to window N
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-- > ++ [((modm, k), focusNth i)
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-- > | (i, k) <- zip [0 .. 8] [xK_1 ..]]
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--
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-- For detailed instructions on editing your key bindings, see
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-- "XMonad.Doc.Extending#Editing_key_bindings".
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-- | Give focus to the nth window of the current workspace.
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focusNth :: Int -> X ()
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focusNth = windows . modify' . focusNth'
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focusNth' :: Int -> Stack a -> Stack a
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focusNth' n s@(Stack _ ls rs) | (n < 0) || (n > length ls + length rs) = s
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| otherwise = listToStack n (integrate s)
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-- | Swap current window with nth. Focus stays in the same position
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swapNth :: Int -> X ()
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swapNth = windows . modify' . swapNth'
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swapNth' :: Int -> Stack a -> Stack a
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swapNth' n s@(Stack c l r)
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| (n < 0) || (n > length l + length r) || (n == length l) = s
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| n < length l = let (nl, nc:nr) = splitAt (length l - n - 1) l in Stack nc (nl ++ c : nr) r
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| otherwise = let (nl, nc:nr) = splitAt (n - length l - 1) r in Stack nc l (nl ++ c : nr)
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listToStack :: Int -> [a] -> Stack a
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listToStack n l = Stack t ls rs
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where
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(t:rs) = drop n l
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ls = reverse (take n l)
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