add Eq superclass to DecorationStyle and change styles in order not to decorate non managed windows

XMonad/Layout/Decoration.hs

@@ -98,7 +98,7 @@ data Decoration ds s a =
     Decoration (Invisible Maybe DecorationState) s Theme (ds a)
     deriving (Show, Read)
 
-class (Read (ds a), Show (ds a)) => DecorationStyle ds a where
+class (Read (ds a), Show (ds a), Eq a) => DecorationStyle ds a where
     describeDeco :: ds a -> String
     describeDeco ds = show ds
 
@@ -120,14 +120,17 @@ class (Read (ds a), Show (ds a)) => DecorationStyle ds a where
 
     pureDecoration :: ds a -> Dimension -> Dimension -> Rectangle
                    -> W.Stack a -> [(a,Rectangle)] -> (a,Rectangle) -> Maybe Rectangle
-    pureDecoration _ _ h _ _ _ (_,Rectangle x y w _) = Just $ Rectangle x y w h
+    pureDecoration _ _ ht _ s _ (w,Rectangle x y wh _) = if isInStack s w
+                                                         then Just $ Rectangle x y wh ht
+                                                         else Nothing
+
 
     decorate :: ds a -> Dimension -> Dimension -> Rectangle
              -> W.Stack a -> [(a,Rectangle)] -> (a,Rectangle) -> X (Maybe Rectangle)
     decorate ds w h r s ars ar = return $ pureDecoration ds w h r s ars ar
 
 data DefaultDecoration a = DefaultDecoration deriving ( Read, Show )
-instance DecorationStyle DefaultDecoration a
+instance Eq a => DecorationStyle DefaultDecoration a
 
 instance (DecorationStyle ds Window, Shrinker s) => LayoutModifier (Decoration ds s) Window where
     redoLayout (Decoration st sh t ds) sc stack wrs

XMonad/Layout/DecorationMadness.hs

@@ -84,6 +84,7 @@ module XMonad.Layout.DecorationMadness
     , floatSimpleTabbed
     , floatTabbed
     , defaultTheme, shrinkText
+    , SimpleTabbedDecoration (..)
     ) where
 
 import Data.List
@@ -146,7 +147,8 @@ instance Eq a => DecorationStyle SimpleTabbedDecoration a where
     decorateFirst _ = True
     shrink    _ _ r = r
     decorationMouseDragHook _ _ _ = return ()
-    pureDecoration _ _ ht (Rectangle x y wh _) s wrs (w,_) = Just $ Rectangle nx y nwh (fi ht)
+    pureDecoration _ _ ht (Rectangle x y wh _) s wrs (w,_) =
+        if isInStack s w then Just $ Rectangle nx y nwh (fi ht) else Nothing
         where nwh = wh `div` max 1 (fi $ length wrs)
               nx  = case w `elemIndex` (S.integrate s) of
                       Just i  -> x + (fi nwh * fi i)
@@ -561,11 +563,11 @@ mirrorTallTabbed s t = decoration s t SimpleTabbed (resizeVertical (fi $ decoHei
 -- Here you can find a screen shot:
 --
 -- <http://code.haskell.org/~arossato/xmonadShots/floatSimpleSimple.png>
-floatSimpleSimple :: ModifiedLayout (Decoration SimpleDecoration DefaultShrinker)
+floatSimpleSimple :: Eq a => ModifiedLayout (Decoration SimpleDecoration DefaultShrinker)
 	             (ModifiedLayout MouseResize (ModifiedLayout WindowArranger SimpleFloat)) a
 floatSimpleSimple = simpleFloat
 
-floatSimple :: Shrinker s => s -> Theme ->
+floatSimple :: (Eq a, Shrinker s) => s -> Theme ->
                ModifiedLayout (Decoration SimpleDecoration s)
 	      (ModifiedLayout MouseResize (ModifiedLayout WindowArranger SimpleFloat)) a
 floatSimple = simpleFloat'
@@ -575,13 +577,13 @@ floatSimple = simpleFloat'
 -- Here you can find a screen shot:
 --
 -- <http://code.haskell.org/~arossato/xmonadShots/floatSimpleDefault.png>
-floatSimpleDefault :: ModifiedLayout (Decoration DefaultDecoration DefaultShrinker)
+floatSimpleDefault :: Eq a => ModifiedLayout (Decoration DefaultDecoration DefaultShrinker)
 	              (ModifiedLayout MouseResize (ModifiedLayout WindowArranger SimpleFloat)) a
 floatSimpleDefault = decoration shrinkText defaultTheme DefaultDecoration (mouseResize $ windowArrangeAll $ SF 20)
 
 -- | Same as 'floatSimpleDefault', but with the possibility of setting a
 -- custom shrinker and a custom theme.
-floatDefault :: Shrinker s => s -> Theme ->
+floatDefault :: (Eq a, Shrinker s) => s -> Theme ->
                 ModifiedLayout (Decoration DefaultDecoration s)
 	       (ModifiedLayout MouseResize (ModifiedLayout WindowArranger SimpleFloat)) a
 floatDefault s c = decoration s c DefaultDecoration (mouseResize $ windowArrangeAll $ SF (decoHeight c))

XMonad/Layout/DwmStyle.hs

@@ -62,7 +62,7 @@ data DwmStyle a = Dwm deriving (Show, Read)
 instance Eq a => DecorationStyle DwmStyle a where
     describeDeco _ = "DwmStyle"
     shrink  _ _  r = r
-    pureDecoration _ wh ht _ (Stack fw _ _) _ (win,Rectangle x y wid _) =
+    pureDecoration _ wh ht _ s@(Stack fw _ _) _ (w,Rectangle x y wid _) =
-        if win == fw then Nothing else Just $ Rectangle (fi nx) y nwh (fi ht)
+        if w == fw || not (isInStack s w) then Nothing else Just $ Rectangle (fi nx) y nwh (fi ht)
             where nwh = min wid $ fi wh
                   nx  = fi x + wid - nwh

XMonad/Layout/SimpleDecoration.hs

@@ -53,16 +53,20 @@ import XMonad.Layout.Decoration
 -- > myL = dwmStyle shrinkText mySDConfig (layoutHook defaultTheme)
 
 -- | Add simple decorations to windows of a layout.
-simpleDeco :: Shrinker s => s -> Theme
+simpleDeco :: (Eq a, Shrinker s) => s -> Theme
            -> l a -> ModifiedLayout (Decoration SimpleDecoration s) l a
 simpleDeco s c = decoration s c $ Simple True
 
 data SimpleDecoration a = Simple Bool deriving (Show, Read)
 
-instance DecorationStyle SimpleDecoration a where
+instance Eq a => DecorationStyle SimpleDecoration a where
     describeDeco _ = "Simple"
     shrink (Simple b) (Rectangle _ _ _ dh) r@(Rectangle x y w h) =
         if b then Rectangle x (y + fi dh) w (h - dh) else r
-    pureDecoration (Simple b) wh ht _ _ _ (_,Rectangle x y wid _) =
+    pureDecoration (Simple b) wh ht _ s _ (w,Rectangle x y wid _) =
-        if b then Just $ Rectangle x y nwh ht else Just $ Rectangle x (y - fi ht) nwh ht
+        if isInStack s w
+        then if b
+             then Just $ Rectangle x  y          nwh ht
+             else Just $ Rectangle x (y - fi ht) nwh ht
+        else Nothing
             where nwh = min wid wh

XMonad/Layout/SimpleFloat.hs

@@ -49,13 +49,13 @@ import XMonad.Layout.WindowArranger
 -- to the window's initial attributes.
 --
 -- This version is decorated with the 'SimpleDecoration' style.
-simpleFloat :: ModifiedLayout (Decoration SimpleDecoration DefaultShrinker)
+simpleFloat :: Eq a => ModifiedLayout (Decoration SimpleDecoration DefaultShrinker)
 	       (ModifiedLayout MouseResize (ModifiedLayout WindowArranger SimpleFloat)) a
 simpleFloat = decoration shrinkText defaultTheme (Simple False) (mouseResize $ windowArrangeAll $ SF 20)
 
 -- | Same as 'simpleFloat', but with the possibility of setting a
 -- custom shrinker and a custom theme.
-simpleFloat' :: Shrinker s => s -> Theme ->
+simpleFloat' :: (Eq a, Shrinker s) => s -> Theme ->
                ModifiedLayout (Decoration SimpleDecoration s)
 	       (ModifiedLayout MouseResize (ModifiedLayout WindowArranger SimpleFloat)) a
 simpleFloat' s c = decoration s c (Simple False) (mouseResize $ windowArrangeAll $ SF (decoHeight c))