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module Rahm.Desktop.Dragging where
import Control.Monad (filterM, when)
import Control.Monad.Trans (lift)
import Control.Monad.Trans.Maybe (MaybeT (MaybeT))
import Data.IORef (newIORef, readIORef, writeIORef)
import Data.Maybe (fromMaybe, isJust)
import Rahm.Desktop.BorderColors (setBorderColor, BorderColor (BorderColor))
import Rahm.Desktop.Common (pointerLocation, pointerWindow, runMaybeT_)
import Rahm.Desktop.Layout.Hole (addHoleForWindow, removeHoleForWindow, resetHole)
import Rahm.Desktop.Layout.PinWindow (isWindowPinned, pinWindow, unpinWindow)
import Rahm.Desktop.Logger
import Rahm.Desktop.Marking (setAlternateWindows)
import qualified Rahm.Desktop.StackSet as W
import XMonad (X, io)
import qualified XMonad as X
import XMonad.Util.WindowProperties (getProp32s)
-- Action which happens after a dragging event.
--
-- The window is the window under
newtype AfterDragAction = AfterDragAction (X.Window -> X.Button -> X ())
instance Semigroup AfterDragAction where
(AfterDragAction f1) <> (AfterDragAction f2) =
AfterDragAction $ \w b -> f1 w b >> f2 w b
instance Monoid AfterDragAction where
mappend = (<>)
mempty = AfterDragAction $ \_ _ -> return ()
dragBorderColor = BorderColor "#00ffff" "#80a0a0"
afterDrag :: X () -> X ()
afterDrag action = do
X.modify $ \case
st@(X.XState {X.dragging = Just (fn, cleanup)}) ->
st {X.dragging = Just (fn, cleanup >> action)}
s -> s
isDragging :: X Bool
isDragging = X.gets (isJust . X.dragging)
finishDrag :: X ()
finishDrag = runMaybeT_ $ do
(_, cleanup) <- MaybeT $ X.gets X.dragging
X.modify $ \s -> s {X.dragging = Nothing}
lift cleanup
windowsUnderCursor :: X [X.Window]
windowsUnderCursor = do
(dpy, root) <- X.asks $ (,) <$> X.display <*> X.theRoot
aw <- X.withWindowSet (return . W.allVisibleWindows)
let fi :: (Integral a, Integral b) => a -> b
fi = fromIntegral
(cx, cy) <- pointerLocation
filterM
( \win -> do
(_, fi -> x, fi -> y, fi -> w, fi -> h, _, _) <- io $ X.getGeometry dpy win
return
( cx > x
&& cx < x + fi w
&& cy > y
&& cy < y + h
)
)
aw
sinkOnRelease :: AfterDragAction
sinkOnRelease = AfterDragAction $ \window _ -> sinkByWindowUnderCursor window
sinkByWindowUnderCursor :: X.Window -> X ()
sinkByWindowUnderCursor window = do
unpinWindow window
(cx, cy) <- pointerLocation
wins <- filter (/= window) <$> windowsUnderCursor
t <- fmap (W.tag . W.workspace) <$> X.pointScreen cx cy
X.windows $
W.focusWindow window
. case wins of
(h : _) -> W.sinkBy window h
_ -> W.sink window
. ( \ss -> case t of
Nothing -> ss
Just t' -> W.shiftWin t' window ss
)
where
fi = fromIntegral
ifReleased :: X.Button -> AfterDragAction -> AfterDragAction
ifReleased but (AfterDragAction act) = AfterDragAction $ \win b -> do
when (but == b) $ act win b
-- Like ifReleased, but with a function instead of an AfterDragAction
ifReleased' :: X.Button -> (X.Window -> X.Button -> X ()) -> AfterDragAction
ifReleased' but act = ifReleased but (AfterDragAction act)
mouseResizeWindowAndThen ::
(X.Window -> X ()) ->
AfterDragAction ->
X.Window ->
X ()
mouseResizeWindowAndThen beforeAction (AfterDragAction releaseAction) window = do
beforeAction window
windowPinned <- isWindowPinned window
unpinWindow window
tilePosition <- X.withWindowSet $ return . W.windowTilePosition window
mapM_ (X.broadcastMessage . flip addHoleForWindow window) tilePosition
X.mouseResizeWindow window
afterDrag $ do
X.broadcastMessage $ removeHoleForWindow window
curev <- X.asks X.currentEvent
when windowPinned $
pinWindow window
releaseAction
window
( maybe
0
( \case
X.ButtonEvent {X.ev_button = b} -> b
_ -> 0
)
curev
)
X.refresh
mouseMoveWindowAndThen ::
(X.Window -> X ()) ->
AfterDragAction ->
X.Window ->
X ()
mouseMoveWindowAndThen beforeAction (AfterDragAction releaseAction) window = do
beforeAction window
windowPinned <- isWindowPinned window
unpinWindow window
tilePosition <- X.withWindowSet $ return . W.windowTilePosition window
mapM_ (X.broadcastMessage . flip addHoleForWindow window) tilePosition
X.mouseMoveWindow window
afterDrag $ do
X.broadcastMessage $ removeHoleForWindow window
curev <- X.asks X.currentEvent
when windowPinned $
pinWindow window
releaseAction
window
( maybe
0
( \case
X.ButtonEvent {X.ev_button = b} -> b
_ -> 0
)
curev
)
X.refresh
dragWorkspace :: X ()
dragWorkspace = do
(ox, oy) <- pointerLocation
X.mouseDrag (\_ _ -> return ()) $ do
(nx, ny) <- pointerLocation
runMaybeT_ $ do
(W.Screen (W.tag -> ws1) _ _) <- MaybeT $ X.pointScreen ox oy
(W.Screen (W.tag -> ws2) _ _) <- MaybeT $ X.pointScreen nx ny
lift $ X.windows $ W.switchWorkspaces ws1 ws2
dragWindow :: X ()
dragWindow = do
w <- pointerWindow
isDockOrRoot <- windowIsDockOrRoot w
if isDockOrRoot
then dragWorkspace
else do
cleanup <- setBorderColor dragBorderColor [w]
ref <- io $ newIORef (w, return ())
X.mouseDrag
( \_ _ -> do
w' <- pointerWindow
(ow, ocleanup) <- io $ readIORef ref
case () of
() | ow /= w' -> do
ocleanup
cleanup' <-
if w' == 0 || w' == w
then return (return ())
else setBorderColor dragBorderColor [w']
io $ writeIORef ref (w', cleanup')
() -> return ()
return ()
)
$ do
(nx, ny) <- pointerLocation
w' <- pointerWindow
(_, iocleanup) <- io $ readIORef ref
isDockOrRoot <- windowIsDockOrRoot w'
if isDockOrRoot
then runMaybeT_ $ do
(W.Screen (W.tag -> ws1) _ _) <- MaybeT $ X.pointScreen nx ny
lift $ do
setAlternateWindows [w]
X.windows $ W.sink w . W.shiftWin ws1 w
else do
X.windows $ W.focusWindow w . W.swapWindows [(w, w')]
setAlternateWindows [w, w']
iocleanup
cleanup
where
windowIsDockOrRoot 0 = return True
windowIsDockOrRoot w = do
dock <- X.getAtom "_NET_WM_WINDOW_TYPE_DOCK"
desk <- X.getAtom "_NET_WM_WINDOW_TYPE_DESKTOP"
mbr <-
if w == 0
then return Nothing
else getProp32s "_NET_WM_WINDOW_TYPE" w
return $ maybe False (any ((`elem` [dock, desk]) . fromIntegral)) mbr
|
