From 802450ed9fa6c5fd2e0a27f398cc01dcd5a1c864 Mon Sep 17 00:00:00 2001
From: mail <mail@joachim-breitner.de>
Date: Sun, 7 Oct 2007 12:31:16 +0200
Subject: ManageDocks now handles STRUT windows as well

It now also detects window with STRUT set and modifies the gap accordingly.
Cheveats:
 * Only acts on STRUT apps on creation, not if you move or close them
 * To reset the gap, press Mod-b twice and restart xmonad (Mod-q)

darcs-hash:20071007103116-c9905-8582a9f756d9ef8a61c7f118d677159796b00c40.gz
---
 ManageDocks.hs | 51 ++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 46 insertions(+), 5 deletions(-)

diff --git a/ManageDocks.hs b/ManageDocks.hs
index f487a60..2f702e8 100644
--- a/ManageDocks.hs
+++ b/ManageDocks.hs
@@ -9,7 +9,14 @@
 -- Portability  : unportable
 --
 -- Makes xmonad detect windows with type DOCK and does not put them in
--- layouts.
+-- layouts. It also detects window with STRUT set and modifies the
+-- gap accordingly.
+--
+-- Cheveats:
+--
+--  * Only acts on STRUT apps on creation, not if you move or close them
+--
+--  * To reset the gap, press Mod-b twice and restart xmonad (Mod-q)
 -----------------------------------------------------------------------------
 module XMonadContrib.ManageDocks (
 	-- * Usage
@@ -23,6 +30,7 @@ import Operations
 import qualified StackSet as W
 import Graphics.X11.Xlib
 import Graphics.X11.Xlib.Extras
+import Data.Word
 
 -- $usage
 -- Add the imports to your configuration file and add the mangeHook:
@@ -37,10 +45,13 @@ import Graphics.X11.Xlib.Extras
 
 
 -- |
--- Deteckts if the given window is of type DOCK and if so, reveals it, but does
--- not manage it
+-- Detects if the given window is of type DOCK and if so, reveals it, but does
+-- not manage it. If the window has the STRUT property set, adjust the gap accordingly.
 manageDocksHook :: Window -> X (WindowSet -> WindowSet)
 manageDocksHook w = do
+	hasStrut <- getStrut w
+	maybe (return ()) setGap hasStrut
+
 	isDock <- checkDock w
 	if isDock then do
 		reveal w
@@ -48,12 +59,42 @@ manageDocksHook w = do
 	      else do
 	        return id
 
+-- |
+-- Checks if a window is a DOCK window
 checkDock :: Window -> X (Bool)
 checkDock w = do
 	a <- getAtom "_NET_WM_WINDOW_TYPE"
 	d <- getAtom "_NET_WM_WINDOW_TYPE_DOCK"
-	mbr <- withDisplay $ \dpy -> do
-		io $ getWindowProperty32 dpy a w 
+	mbr <- getProp a w
 	case mbr of 
 		Just [r] -> return (r == d)
 		_        -> return False
+
+-- | 
+-- Gets the STRUT config, if present, in xmonad gap order
+getStrut :: Window -> X (Maybe (Int, Int, Int, Int))
+getStrut w = do 
+	a <- getAtom "_NET_WM_STRUT"
+	mbr <- getProp a w
+	case mbr of 
+		Just [l,r,t,b] -> return (Just (
+					fromIntegral t,
+					fromIntegral b,
+					fromIntegral l,
+					fromIntegral r))
+		_              -> return Nothing
+
+-- |
+-- Helper to read a property
+getProp :: Atom -> Window -> X (Maybe [Word32])
+getProp a w = withDisplay $ \dpy -> io $ getWindowProperty32 dpy a w
+
+-- |
+-- Modifies the gap, setting new max
+setGap :: (Int, Int, Int, Int) -> X ()
+setGap gap = modifyGap (\_ -> max4 gap)
+
+-- |
+-- Piecewise maximum of a 4-tuple of Ints
+max4 :: (Int, Int, Int, Int) -> (Int, Int, Int, Int) -> (Int, Int, Int, Int) 
+max4 (a1,a2,a3,a4) (b1,b2,b3,b4) = (max a1 b1, max a2 b2, max a3 b3, max a4 b4)
-- 
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