add new LayoutScreens module.

LayoutScreens.hs

@@ -0,0 +1,66 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module      :  XMonadContrib.RotView
+-- Copyright   :  (c) David Roundy <droundy@darcs.net>
+-- License     :  BSD3-style (see LICENSE)
+--
+-- Maintainer  :  David Roundy <droundy@darcs.net>
+-- Stability   :  unstable
+-- Portability :  unportable
+--
+-- Provides bindings to cycle through non-empty workspaces.
+--
+-----------------------------------------------------------------------------
+
+module XMonadContrib.LayoutScreens (
+                                    -- * Usage
+                                    -- $usage
+                                    layoutScreens
+                                   ) where
+
+import Control.Monad.State ( modify )
+import Control.Monad.Reader ( asks )
+
+import XMonad
+import qualified StackSet as W
+import qualified Operations as O
+import Graphics.X11.Xlib
+import Graphics.X11.Xlib.Extras
+
+-- $usage
+
+-- This module allows you to pretend that you have more than one screen by
+-- dividing a single screen into multiple screens that xmonad will treat as
+-- separate screens.  This should definitely be useful for testing the
+-- behavior of xmonad under Xinerama, and it's possible that it'd also be
+-- handy for use as an actual user interface, if you've got a very large
+-- sceen and long for greater flexibility (e.g. being able to see your
+-- email window at all times, a crude mimic of sticky windows).
+
+-- You can use this module with the following in your Config.hs file:
+-- 
+-- > import XMonadContrib.LayoutScreens
+--
+-- >   , ((modMask .|. shiftMask, xK_space), layoutScreens 2 (twoPane 0.5 0.5))
+-- >   , ((controlMask .|. modMask .|. shiftMask, xK_space), do layoutScreens 1 xineScreenLayout
+--                                                              rescreen)
+
+layoutScreens :: Int -> Layout Int -> X ()
+layoutScreens nscr _ | nscr < 1 = trace $ "Can't layoutScreens with only " ++ show nscr ++ " screens."
+layoutScreens nscr l =
+    do rtrect <- asks theRoot >>= getWindowRectangle
+       wss <- doLayout l rtrect W.Stack { W.focus=1, W.up=[],W.down=[1..nscr-1] }
+       modify $ \s -> s { xineScreens = map snd wss
+                        , statusGaps  = take nscr $ (statusGaps s) ++ repeat (0,0,0,0) }
+
+       O.windows $ \ws@(W.StackSet { W.current = v, W.visible = vs, W.hidden = hs }) ->
+           let (x:xs, ys) = splitAt nscr $ map W.workspace (v:vs) ++ hs
+           in  ws { W.current = W.Screen x 0
+                  , W.visible = zipWith W.Screen xs [1 ..]
+                  , W.hidden  = ys }
+
+getWindowRectangle :: Window -> X Rectangle
+getWindowRectangle w = withDisplay $ \d ->
+    do a <- io $ getWindowAttributes d w
+       return $ Rectangle (fromIntegral $ wa_x a)     (fromIntegral $ wa_y a)
+                          (fromIntegral $ wa_width a) (fromIntegral $ wa_height a)

MetaModule.hs

@@ -34,7 +34,7 @@ import XMonadContrib.FindEmptyWorkspace ()
 import XMonadContrib.GreedyView ()
 import XMonadContrib.HintedTile ()
 import XMonadContrib.LayoutHints ()
-import XMonadContrib.LayoutHooks ()
+import XMonadContrib.LayoutScreens ()
 import XMonadContrib.MagicFocus ()
 import XMonadContrib.Mosaic ()
 import XMonadContrib.Magnifier ()