From 4866f2e367dfcf22a9591231ba40948826a1b438 Mon Sep 17 00:00:00 2001
From: Spencer Janssen <sjanssen@cse.unl.edu>
Date: Thu, 1 Nov 2007 21:10:59 +0100
Subject: Hierarchify

darcs-hash:20071101201059-a5988-fc1f1262bec1b69e13ba18ae7cefeafc8c4471d4.gz
---
 XMonad/Actions/DynamicWorkspaces.hs | 107 ++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 XMonad/Actions/DynamicWorkspaces.hs

(limited to 'XMonad/Actions/DynamicWorkspaces.hs')

diff --git a/XMonad/Actions/DynamicWorkspaces.hs b/XMonad/Actions/DynamicWorkspaces.hs
new file mode 100644
index 0000000..6aa3fb9
--- /dev/null
+++ b/XMonad/Actions/DynamicWorkspaces.hs
@@ -0,0 +1,107 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module      :  XMonad.Actions.DynamicWorkspaces
+-- 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 add and delete workspaces.  Note that you may only
+-- delete a workspace that is already empty.
+--
+-----------------------------------------------------------------------------
+
+module XMonad.Actions.DynamicWorkspaces (
+                                         -- * Usage
+                                         -- $usage
+                                         addWorkspace, removeWorkspace,
+                                         selectWorkspace, renameWorkspace,
+                                         toNthWorkspace, withNthWorkspace
+                                       ) where
+
+import Control.Monad.State ( gets )
+import Data.List ( sort )
+
+import XMonad ( X, XState(..), Layout, WorkspaceId, WindowSet )
+import XMonad.Operations
+import XMonad.StackSet hiding (filter, modify, delete)
+import Graphics.X11.Xlib ( Window )
+import XMonad.Prompt.Workspace
+import XMonad.Prompt ( XPConfig )
+
+-- $usage
+-- You can use this module with the following in your Config.hs file:
+-- 
+-- > import XMonad.Actions.DynamicWorkspaces
+--
+-- >   , ((modMask .|. shiftMask, xK_n), selectWorkspace defaultXPConfig layoutHook)
+-- >   , ((modMask .|. shiftMask, xK_BackSpace), removeWorkspace)
+-- >   , ((modMask .|. shiftMask .|. controlMask, xK_r), renameWorkspace defaultXPConfig)
+-- 
+-- > -- mod-[1..9] %! Switch to workspace N
+-- > -- mod-shift-[1..9] %! Move client to workspace N
+-- >    ++
+-- >    zip (zip (repeat modMask) [xK_1..xK_9]) (map (withNthWorkspace W.greedyView) [0..])
+-- >    ++
+-- >    zip (zip (repeat (modMask .|. shiftMask)) [xK_1..xK_9]) (map (withNthWorkspace W.shift) [0..])
+
+allPossibleTags :: [WorkspaceId]
+allPossibleTags = map (:"") ['0'..]
+
+renameWorkspace :: XPConfig -> X ()
+renameWorkspace conf = workspacePrompt conf $ \w ->
+                       windows $ \s -> let sett wk = wk { tag = w }
+                                           setscr scr = scr { workspace = sett $ workspace scr }
+                                           sets q = q { current = setscr $ current q }
+                                       in sets $ removeWorkspace' w s
+
+toNthWorkspace :: (String -> X ()) -> Int -> X ()
+toNthWorkspace job wnum = do ws <- gets (sort . map tag . workspaces . windowset)
+                             case drop wnum ws of
+                               (w:_) -> job w
+                               [] -> return ()
+
+withNthWorkspace :: (String -> WindowSet -> WindowSet) -> Int -> X ()
+withNthWorkspace job wnum = do ws <- gets (sort . map tag . workspaces . windowset)
+                               case drop wnum ws of
+                                 (w:_) -> windows $ job w
+                                 [] -> return ()
+
+selectWorkspace :: XPConfig -> Layout Window -> X ()
+selectWorkspace conf l = workspacePrompt conf $ \w ->
+                         windows $ \s -> if tagMember w s
+                                         then greedyView w s
+                                         else addWorkspace' w l s
+
+addWorkspace :: Layout Window -> X ()
+addWorkspace l = do s <- gets windowset
+                    let newtag:_ = filter (not . (`tagMember` s)) allPossibleTags
+                    windows (addWorkspace' newtag l)
+
+removeWorkspace :: X ()
+removeWorkspace = do s <- gets windowset
+                     case s of
+                       StackSet { current = Screen { workspace = torem }
+                                , hidden = (w:_) }
+                           -> do windows $ view (tag w)
+                                 windows (removeWorkspace' (tag torem))
+                       _ -> return ()
+
+addWorkspace' :: i -> l -> StackSet i l a sid sd -> StackSet i l a sid sd
+addWorkspace' newtag l s@(StackSet { current = scr@(Screen { workspace = w })
+                                   , hidden = ws })
+    = s { current = scr { workspace = Workspace newtag l Nothing }
+        , hidden = w:ws }
+
+removeWorkspace' :: (Eq i) => i -> StackSet i l a sid sd -> StackSet i l a sid sd
+removeWorkspace' torem s@(StackSet { current = scr@(Screen { workspace = wc })
+                                   , hidden = (w:ws) })
+    | tag w == torem = s { current = scr { workspace = wc { stack = meld (stack w) (stack wc) } }
+                         , hidden = ws }
+   where meld Nothing Nothing = Nothing
+         meld x Nothing = x
+         meld Nothing x = x
+         meld (Just x) (Just y) = differentiate (integrate x ++ integrate y)
+removeWorkspace' _ s = s
-- 
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