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51 lines
1.7 KiB
Haskell
51 lines
1.7 KiB
Haskell
{-# LANGUAGE RankNTypes #-}
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module Utils where -- copied from the core library
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import XMonad.StackSet hiding (filter)
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import Graphics.X11.Xlib.Types (Rectangle(..))
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import Data.List (sortBy)
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-- Useful operation, the non-local workspaces
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hidden_spaces :: StackSet i l a sid sd -> [Workspace i l a]
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hidden_spaces x = map workspace (visible x) ++ hidden x
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-- normalise workspace list
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normal :: Ord i => StackSet i l a s sd -> StackSet i l a s sd
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normal s = s { hidden = sortBy g (hidden s), visible = sortBy f (visible s) }
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where
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f a b = tag (workspace a) `compare` tag (workspace b)
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g a b = tag a `compare` tag b
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noOverlaps :: [Rectangle] -> Bool
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noOverlaps [] = True
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noOverlaps [_] = True
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noOverlaps xs = and [ verts a `notOverlap` verts b
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| a <- xs
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, b <- filter (a /=) xs
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]
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where
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verts (Rectangle a b w h) = (a,b,a + fromIntegral w - 1, b + fromIntegral h - 1)
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notOverlap (left1,bottom1,right1,top1)
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(left2,bottom2,right2,top2)
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= (top1 < bottom2 || top2 < bottom1)
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|| (right1 < left2 || right2 < left1)
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applyN :: (Integral n) => Maybe n -> (a -> a) -> a -> a
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applyN Nothing _ v = v
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applyN (Just 0) _ v = v
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applyN (Just n) f v = applyN (Just $ n - 1) f (f v)
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tags :: StackSet i l a sid sd -> [i]
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tags x = map tag $ workspaces x
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-- | noOverflows op a b is True if @a `op` fromIntegral b@ overflows (or
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-- otherwise gives the same answer when done using Integer
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noOverflows :: (Integral b, Integral c) =>
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(forall a. Integral a => a -> a -> a) -> b -> c -> Bool
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noOverflows op a b = toInteger (a `op` fromIntegral b) == toInteger a `op` toInteger b
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