Add XMonad.Actions.SpawnOn

Ignore-this: 63869d1ab11f2ed5aab1690763065800

darcs-hash:20090117040432-25a6b-306aa18fed69a47197ca8c349cf6452939db5188.gz

1 files changed, 77 insertions, 0 deletions

diff --git a/XMonad/Actions/SpawnOn.hs b/XMonad/Actions/SpawnOn.hs
new file mode 100644
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--- /dev/null
+++ b/XMonad/Actions/SpawnOn.hs
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+-----------------------------------------------------------------------------
+-- |
+-- Module       : XMonad.Actions.SpawnOn
+-- Copyright    : (c) Spencer Janssen
+-- License      : BSD
+--
+-- Maintainer   : Spencer Janssen <spencerjanssen@gmail.com>
+-- Stability    : unstable
+-- Portability  : unportable
+--
+-- This module provides helper functions to be used in @manageHook@. Here's
+-- how you might use this:
+--
+-- > import XMonad.Hooks.ManageHelpers
+-- > main = do
+-- >     sp <- mkSpawner
+-- >     xmonad defaultConfig {
+-- >         ...
+-- >         manageHook = spawnHook sp <+> manageHook defaultConfig
+-- >         ...
+-- >     }
+
+module XMonad.Actions.SpawnOn (
+    Spawner,
+    mkSpawner,
+    manageSpawn,
+    spawnHere,
+    spawnOn,
+    shellPromptHere,
+    shellPromptOn
+) where
+
+import Data.IORef
+import System.Posix.Types (ProcessID)
+
+import XMonad
+import qualified XMonad.StackSet as W
+
+import XMonad.Hooks.ManageHelpers
+import XMonad.Prompt
+import XMonad.Prompt.Shell
+
+newtype Spawner = Spawner {pidsRef :: IORef [(ProcessID, WorkspaceId)]}
+
+maxPids :: Int
+maxPids = 5
+
+mkSpawner :: (Functor m, MonadIO m) => m Spawner
+mkSpawner = io . fmap Spawner $ newIORef []
+
+manageSpawn :: Spawner -> ManageHook
+manageSpawn sp = do
+    pids <- io . readIORef $ pidsRef sp
+    mp <- pid
+    case flip lookup pids =<< mp of
+        Just w -> doF (W.shift w)
+        Nothing -> doF id
+
+mkPrompt :: (String -> X ()) -> XPConfig -> X ()
+mkPrompt cb c = do
+    cmds <- io $ getCommands
+    mkXPrompt Shell c (getShellCompl cmds) cb
+
+shellPromptHere :: Spawner -> XPConfig -> X ()
+shellPromptHere sp = mkPrompt (spawnHere sp)
+
+shellPromptOn :: Spawner -> WorkspaceId -> XPConfig -> X ()
+shellPromptOn sp ws = mkPrompt (spawnOn sp ws)
+
+spawnHere :: Spawner -> String -> X ()
+spawnHere sp cmd = withWindowSet $ \ws -> spawnOn sp (currTag ws) cmd
+ where currTag = W.tag . W.workspace . W.current
+
+spawnOn :: Spawner -> WorkspaceId -> String -> X ()
+spawnOn sp ws cmd = do
+    p <- spawnPID cmd
+    io $ modifyIORef (pidsRef sp) (take maxPids . ((p, ws) :))