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XMonad.Hooks.ManageHelpers: reformatting

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Lukas Mai 2008-03-26 18:27:07 +00:00
parent 6761a61cad
commit 6ada04c415
1 changed files with 23 additions and 21 deletions
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34
XMonad/Hooks/ManageHelpers.hs
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@ -44,9 +44,9 @@ import Data.Monoid
-- | A ManageHook that may or may not have been executed; the outcome is embedded in the Maybe
type MaybeManageHook = Query (Maybe (Endo WindowSet))
-- | A grouping type, which can hold the outcome of a predicate Query
-- This is analogous to group types in regular expressions
-- TODO create a better API for aggregating multiple Matches logically
-- | A grouping type, which can hold the outcome of a predicate Query.
-- This is analogous to group types in regular expressions.
-- TODO: create a better API for aggregating multiple Matches logically
data Match a = Match Bool a
-- | An alternative 'ManageHook' composer. Unlike 'composeAll' it stops as soon as
@ -70,12 +70,14 @@ q /=? x = fmap (/= x) q
-- | q <==? x. if the result of q equals x, return True grouped with q
(<==?) :: Eq a => Query a -> a -> Query (Match a)
q <==? x = fmap (`eq` x) q
where eq q' x' = Match (q' == x') q'
where
eq q' x' = Match (q' == x') q'
-- | q <\/=? x. if the result of q notequals x, return True grouped with q
(</=?) :: Eq a => Query a -> a -> Query (Match a)
q </=? x = fmap (`neq` x) q
where neq q' x' = Match (q' /= x') q'
where
neq q' x' = Match (q' /= x') q'
-- | A helper operator for use in 'composeOne'. It takes a condition and an action;
-- if the condition fails, it returns 'Nothing' from the 'Query' so 'composeOne' will
@ -87,12 +89,14 @@ p -?> f = do
-- | A helper operator for use in 'composeAll'. It takes a condition and a function taking a grouped datum to action. If 'p' is true, it executes the resulting action.
(-->>) :: Query (Match a) -> (a -> ManageHook) -> ManageHook
p -->> f = do Match b m <- p
p -->> f = do
Match b m <- p
if b then (f m) else mempty
-- | A helper operator for use in 'composeOne'. It takes a condition and a function taking a groupdatum to action. If 'p' is true, it executes the resulting action. If it fails, it returns 'Nothing' from the 'Query' so 'composeOne' will go on and try the next rule.
(-?>>) :: Query (Match a) -> (a -> ManageHook) -> MaybeManageHook
p -?>> f = do Match b m <- p
p -?>> f = do
Match b m <- p
if b then fmap Just (f m) else return Nothing
-- | A predicate to check whether a window is a KDE system tray icon.
@ -109,19 +113,18 @@ isKDETrayWindow = ask >>= \w -> liftX $ do
-- It holds the result which might be the window it is transient to
-- or it might be 'Nothing'.
transientTo :: Query (Maybe Window)
transientTo = do w <- ask
transientTo = do
w <- ask
d <- (liftX . asks) display
liftIO $ getTransientForHint d w
-- | A convenience 'MaybeManageHook' that will check to see if a window
-- is transient, and then move it to its parent.
transience :: MaybeManageHook
transience = transientTo </=? Nothing
-?>> move
where move :: Maybe Window -> ManageHook
transience = transientTo </=? Nothing -?>> move
where
move mw = maybe idHook (doF . move') mw
where move' :: Window -> (WindowSet -> WindowSet)
move' w = \s -> maybe s (`W.shift` s) (W.findTag w s)
move' w s = maybe s (`W.shift` s) (W.findTag w s)
-- | 'transience' set to a 'ManageHook'
transience' :: ManageHook
@ -141,6 +144,5 @@ doRectFloat r = ask >>= \w -> doF (W.float w r)
-- | Floats a new window with its original size, but centered.
doCenterFloat :: ManageHook
doCenterFloat = ask >>= \w -> doF . W.float w . center . snd =<< liftX (floatLocation w)
where center (W.RationalRect _ _ w h)
= W.RationalRect ((1-w)/2) ((1-h)/2) w h
where
center (W.RationalRect _ _ w h) = W.RationalRect ((1-w)/2) ((1-h)/2) w h