From 9aad112502bbf81ef02e361f77b0d73c374e37e4 Mon Sep 17 00:00:00 2001
From: Adam Vogt <vogt.adam@gmail.com>
Date: Sun, 3 May 2009 04:03:03 +0200
Subject: Add H.InsertPosition: add new windows to different positions in a
 workspace

Ignore-this: 7e7d5fa5b42698799cabe600159a75f7

darcs-hash:20090503020303-1499c-03bd01137979cfbbe6aaebe4981c03c5597818ab.gz
---
 XMonad/Hooks/InsertPosition.hs | 74 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 XMonad/Hooks/InsertPosition.hs

(limited to 'XMonad/Hooks/InsertPosition.hs')

diff --git a/XMonad/Hooks/InsertPosition.hs b/XMonad/Hooks/InsertPosition.hs
new file mode 100644
index 0000000..54c2a6d
--- /dev/null
+++ b/XMonad/Hooks/InsertPosition.hs
@@ -0,0 +1,74 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module      :  XMonad.Hooks.InsertPosition
+-- Copyright   :  (c) 2009 Adam Vogt
+-- License     :  BSD-style (see xmonad/LICENSE)
+--
+-- Maintainer  :  vogt.adam@gmail.com
+-- Stability   :  unstable
+-- Portability :  portable
+--
+-- Configure where new windows should be added and which window should be
+-- focused.
+--
+-----------------------------------------------------------------------------
+
+module XMonad.Hooks.InsertPosition (
+    -- * Usage
+    -- $usage
+    insertPosition
+    ,Focus(..), Position(..)
+    ) where
+
+import XMonad(ManageHook, MonadReader(ask))
+import qualified XMonad.StackSet as W
+import Control.Applicative((<$>))
+import Data.Maybe(fromMaybe)
+import Data.List(find)
+import Data.Monoid(Endo(Endo))
+
+-- $usage
+-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:
+--
+-- > import XMonad.Hooks.InsertPosition
+-- > xmonad defaultConfig { manageHook = insertPosition Master Newer <+> myManageHook }
+--
+-- You should you put the manageHooks that use 'doShift' to take effect
+-- /before/ 'insertPosition', so that the window order will be consistent.
+-- Because ManageHooks compose from right to left (like function composition
+-- '.'), this means that 'insertPosition' should be the leftmost ManageHook.
+
+data Position = Master | End | Above | Below
+data Focus = Newer | Older
+
+-- | insertPosition. A manage hook for placing new windows. XMonad's default is
+-- the same as using: @insertPosition Above Newer@.
+insertPosition :: Position -> Focus -> ManageHook
+insertPosition pos foc = Endo . g <$> ask
+  where
+    g w = viewingWs w (updateFocus w . ins w . W.delete w)
+    ins w = (\f ws -> fromMaybe id (W.focusWindow <$> W.peek ws) $ f ws) $
+        case pos of
+            Master -> W.insertUp w . W.focusMaster
+            End    -> insertDown w . W.modify' focusLast'
+            Above  -> W.insertUp w
+            Below  -> insertDown w
+    updateFocus =
+        case foc of
+            Older -> const id
+            Newer -> W.focusWindow
+
+-- | Modify the StackSet when the workspace containing w is focused
+viewingWs :: (Eq a, Eq s, Eq i, Show i) =>a-> (W.StackSet i l a s sd -> W.StackSet i l a s sd)-> W.StackSet i l a s sd-> W.StackSet i l a s sd
+viewingWs w f = do
+    i <- W.tag . W.workspace . W.current
+    ws <- find (elem w . W.integrate' . W.stack) . W.workspaces
+    maybe id (fmap (W.view i . f) . W.view . W.tag) ws
+
+-- | 'insertDown' and 'focusLast' belong in XMonad.StackSet?
+insertDown :: (Eq a) => a -> W.StackSet i l a s sd -> W.StackSet i l a s sd
+insertDown w = W.swapDown . W.insertUp w
+
+focusLast' ::  W.Stack a -> W.Stack a
+focusLast' st = let ws = W.integrate st
+    in W.Stack (last ws) (tail $ reverse ws) []
-- 
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