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module XMonad.Actions.FloatSnapSpaced
( snapSpacedMagicMove
) where
import Data.List
import Data.Maybe
import Data.Set (fromList)
import XMonad
import XMonad.Hooks.ManageDocks
import qualified XMonad.StackSet as S
snapSpacedMagicMove :: Int -> Maybe Int -> Maybe Int -> Window -> X ()
snapSpacedMagicMove spacing collidedist snapdist w = whenX (isClient w) $ withDisplay $ \d -> do
io $ raiseWindow d w
wa <- io $ getWindowAttributes d w
nx <- handleAxis True d wa
ny <- handleAxis False d wa
io $ moveWindow d w (fromIntegral nx) (fromIntegral ny)
float w
where
handleAxis horiz d wa = do
((mbl, mbr, bs), (mfl, mfr, fs)) <- getSnap horiz collidedist d w
return $ if bs || fs
then wpos wa
else let b = case (mbl, mbr) of
(Just bl, Just br) -> if wpos wa - bl < br - wpos wa
then bl + spacing
else br + spacing
(Just bl, Nothing) -> bl + spacing
(Nothing, Just br) -> br + spacing
(Nothing, Nothing) -> wpos wa + spacing
f = case (mfl, mfr) of
(Just fl, Just fr) -> if wpos wa + wdim wa - fl < fr - wpos wa - wdim wa
then fl - spacing
else fr - spacing
(Just fl, Nothing) -> fl - spacing
(Nothing, Just fr) -> fr - spacing
(Nothing, Nothing) -> wpos wa - spacing
newpos = if abs (b - wpos wa) <= abs (f - wpos wa - wdim wa)
then b
else f - wdim wa
in if isNothing snapdist || abs (newpos - wpos wa) <= fromJust snapdist
then newpos
else wpos wa
where
(wpos, wdim, _, _) = constructors horiz
getSnap :: Bool -> Maybe Int -> Display -> Window -> X ((Maybe Int, Maybe Int, Bool), (Maybe Int, Maybe Int, Bool))
getSnap horiz collidedist d w = do
wa <- io $ getWindowAttributes d w
screen <- S.current <$> gets windowset
let sr = screenRect $ S.screenDetail screen
wl = S.integrate' . S.stack $ S.workspace screen
gr <- fmap ($ sr) $ calcGap $ fromList [minBound .. maxBound]
wla <- filter (collides wa) <$> io (mapM (getWindowAttributes d) $ filter (/= w) wl)
return ( neighbours (back wa sr gr wla) (wpos wa)
, neighbours (front wa sr gr wla) (wpos wa + wdim wa)
)
where
wborder = fromIntegral.wa_border_width
(wpos, wdim, rpos, rdim) = constructors horiz
(refwpos, refwdim, _, _) = constructors $ not horiz
back wa sr gr wla = dropWhile (< rpos sr)
$ takeWhile (< rpos sr + rdim sr)
$ sort
$ rpos sr :
rpos gr :
(rpos gr + rdim gr) :
foldr (\a as -> wpos a : (wpos a + wdim a + wborder a + wborder wa) : as) [] wla
front wa sr gr wla = dropWhile (<= rpos sr)
$ takeWhile (<= rpos sr + rdim sr)
$ sort
$ (rpos gr - 2 * wborder wa) :
(rpos gr + rdim gr - 2 * wborder wa) :
(rpos sr + rdim sr - 2 * wborder wa) :
foldr (\a as -> (wpos a - wborder a - wborder wa) : (wpos a + wdim a) : as) [] wla
neighbours l v = ( listToMaybe $ reverse $ takeWhile (< v) l
, listToMaybe $ dropWhile (<= v) l
, v `elem` l
)
collides wa oa = case collidedist of
Nothing -> True
Just dist -> refwpos oa - wborder oa < refwpos wa + refwdim wa + wborder wa + dist
&& refwpos wa - wborder wa - dist < refwpos oa + refwdim oa + wborder oa
constructors :: Bool -> (WindowAttributes -> Int, WindowAttributes -> Int, Rectangle -> Int, Rectangle -> Int)
constructors True = ( fromIntegral.wa_x
, fromIntegral.wa_width
, fromIntegral.rect_x
, fromIntegral.rect_width
)
constructors False = ( fromIntegral.wa_y
, fromIntegral.wa_height
, fromIntegral.rect_y
, fromIntegral.rect_height
)
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