From 78010c48aa164e9df28557e37555f3eaf99c7e87 Mon Sep 17 00:00:00 2001
From: Stefan O'Rear <stefanor@cox.net>
Date: Tue, 12 Jun 2007 07:53:39 +0200
Subject: Add a broadcastMessage function, which sends to all visible
 workspaces without refreshing. (+6 loc)

darcs-hash:20070612055339-e3110-05285df631a523afce0a2c6dca993df9dfbad470
---
 Operations.hs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Operations.hs b/Operations.hs
index d51b1e2..f5a78a3 100644
--- a/Operations.hs
+++ b/Operations.hs
@@ -36,6 +36,8 @@ import Graphics.X11.Xlib
 import Graphics.X11.Xinerama (getScreenInfo)
 import Graphics.X11.Xlib.Extras
 
+import qualified Data.Traversable as T
+
 -- ---------------------------------------------------------------------
 -- |
 -- Window manager operations
@@ -350,6 +352,14 @@ sendMessage a = do n <- (W.tag . W.workspace . W.current) `fmap` gets windowset
                    whenJust ml' $ \l' -> do modify $ \s -> s { layouts = M.insert n (l',ls) (layouts s) }
                                             refresh
 
+-- | Send a message to all visible layouts, without necessarily refreshing.
+-- This is how we implement the hooks, such as ModifyWindows.
+broadcastMessage :: Message a => a -> X ()
+broadcastMessage a = do
+    ol <- gets layouts
+    nl <- T.forM ol $ \ (l,ls) -> maybe (l,ls) (flip (,) ls) `fmap` modifyLayout l (SomeMessage a)
+    modify $ \s -> s { layouts = nl }
+
 instance Message Event
 
 --
-- 
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