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Add Migrate message to L.SubLayouts, for better support of moving windows between groups

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Adam Vogt 2009-07-05 17:49:34 +00:00
parent 1f13242164
commit f8a4dd9503
1 changed files with 23 additions and 13 deletions
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36
XMonad/Layout/SubLayouts.hs
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@ -228,7 +228,10 @@ data GroupMsg a
-- ^ separate the focused group into singleton groups
| Merge a a -- ^ merge the first group into the second group
| MergeAll a
-- ^ make one large group, keeping a focused
-- ^ make one large group, keeping the parameter focused
| Migrate a a
-- ^ used to move windows from one group to another, this may
-- be replaced by a combination of 'UnMerge' and 'Merge'
| WithGroup (W.Stack a -> X (W.Stack a)) a
| SubMessage SomeMessage a
-- ^ the sublayout with the given window will get the message
@ -252,20 +255,16 @@ data Broadcast = Broadcast SomeMessage -- ^ send a message to all sublayouts
instance Message Broadcast
instance Typeable a => Message (GroupMsg a)
-- | pullGroup, pushGroup allow you to merge windows or groups inheriting the
-- position of the current window (pull) or the other window (push).
pullGroup :: Direction -> Navigate
-- | @pullGroup@, @pushGroup@ allow you to merge windows or groups inheriting
-- the position of the current window (pull) or the other window (push).
--
-- @pushWindow@ and @pullWindow@ move individual windows between groups. They
-- are less effective at preserving window positions.
pullGroup,pushGroup,pullWindow,pushWindow :: Direction -> Navigate
pullGroup = mergeNav (\o c -> sendMessage $ Merge o c)
pullWindow :: Direction -> Navigate
pullWindow = mergeNav (\o c -> sendMessage (UnMerge o) >> sendMessage (Merge o c))
pushGroup :: Direction -> Navigate
pushGroup = mergeNav (\o c -> sendMessage $ Merge c o)
pushWindow :: Direction -> Navigate
pushWindow = mergeNav (\o c -> sendMessage (UnMerge c) >> sendMessage (Merge c o))
pullWindow = mergeNav (\o c -> sendMessage $ Migrate o c)
pushWindow = mergeNav (\o c -> sendMessage $ Migrate c o)
mergeNav :: (Window -> Window -> X ()) -> Direction -> Navigate
mergeNav f = Apply (\o -> withFocused (f o))
@ -364,12 +363,23 @@ instance (Read (l Window), Show (l Window), LayoutClass l Window) => LayoutModif
fgs . M.fromList . map (W.focus &&& id) . M.elems
$ M.mapMaybe (W.filter (x/=)) gs
-- XXX sometimes this migrates an incorrect window, why?
| Just (Migrate x y) <- fromMessage m
, Just xst <- findGroup x
, Just (W.Stack yf yu yd) <- findGroup y =
let zs = W.Stack x (yf:yu) yd
nxsAdd = maybe id (\e -> M.insert (W.focus e) e) $ W.filter (x/=) xst
in fgs $ nxsAdd $ M.insert x zs $ M.delete yf gs
| otherwise = fmap join $ sequenceA $ catchLayoutMess <$> fromMessage m
where gs = toGroups sls
fgs gs' = do
st <- currentStack
Just . Sublayout (I ms) defl . map snd <$> fromGroups defl st gs' sls
findGroup z = mplus (M.lookup z gs) $ listToMaybe
$ M.elems $ M.filter ((z `elem`) . W.integrate) gs
-- catchLayoutMess :: LayoutMessages -> X (Maybe (Sublayout l Window))
-- This l must be the same as from the instance head,
-- -XScopedTypeVariables should bring it into scope, but we are