1 files changed, 47 insertions, 0 deletions
diff --git a/Magnifier.hs b/Magnifier.hs
new file mode 100644
index 0000000..3f378ff
--- /dev/null
+++ b/Magnifier.hs
@@ -0,0 +1,47 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module      :  XMonadContrib.Magnifier
+-- Copyright   :  (c) Peter De Wachter 2007
+-- License     :  BSD-style (see xmonad/LICENSE)
+-- 
+-- Maintainer  :  Peter De Wachter <pdewacht@gmail.com>
+-- Stability   :  unstable
+-- Portability :  unportable
+--
+-- Screenshot  :  http://caladan.rave.org/magnifier.png
+--
+-- This layout hack increases the size of the window that has focus.
+-- The master window is left alone. (Maybe that should be an option.)
+--
+--
+-----------------------------------------------------------------------------
+
+
+module XMonadContrib.Magnifier (magnifier) where
+
+import Graphics.X11.Xlib
+import XMonad
+import StackSet
+
+magnifier :: Layout -> Layout
+magnifier l = l { doLayout = \r s -> applyMagnifier r s `fmap` doLayout l r s
+                , modifyLayout = \x -> fmap magnifier `fmap` modifyLayout l x }
+
+applyMagnifier :: Rectangle -> Stack Window -> [(Window, Rectangle)] -> [(Window, Rectangle)]
+applyMagnifier r s | null (up s) = id  -- don't change the master window
+                   | otherwise   = map $ \(w,wr) -> if w == focus s then (w, shrink r $ magnify wr) else (w, wr)
+
+magnify :: Rectangle -> Rectangle
+magnify (Rectangle x y w h) = Rectangle x' y' w' h'
+    where x' = x - fromIntegral (w' - w) `div` 2
+          y' = y - fromIntegral (h' - h) `div` 2
+          w' = round $ fromIntegral w * zoom
+          h' = round $ fromIntegral h * zoom
+          zoom = 1.5 :: Double
+
+shrink :: Rectangle -> Rectangle -> Rectangle
+shrink (Rectangle sx sy sw sh) (Rectangle x y w h) = Rectangle x' y' w' h'
+    where x' = max sx x 
+          y' = max sy y
+          w' = min w (fromIntegral sx + sw - fromIntegral x')
+          h' = min h (fromIntegral sy + sh - fromIntegral y')