WindowGo.hs: +raiseBrowser, raiseEditor

Specialize runOrRaise in the same way as with Actions.Search, for one's browser and one's editors.

XMonad/Actions/WindowGo.hs

@@ -10,8 +10,7 @@ Defines a few convenient operations for raising (traveling to) windows based on
 monad, such as 'runOrRaise'. runOrRaise will run a shell command unless it can
 find a specified window; you would use this to automatically travel to your
 Firefox or Emacs session, or start a new one (for example), instead of trying to
-remember where you left it or whether you still have one running.
--}
+remember where you left it or whether you still have one running. -}
 
 module XMonad.Actions.WindowGo (
                  -- * Usage
@@ -19,13 +18,19 @@ module XMonad.Actions.WindowGo (
                  raise,
                  runOrRaise,
                  raiseMaybe,
+
+                 raiseBrowser,
+                 raiseEditor,
                  module XMonad.ManageHook
                 ) where
 
-import XMonad (Query(), X(), withWindowSet, spawn, runQuery, focus)
 import Control.Monad (filterM)
-import qualified XMonad.StackSet as W (allWindows)
+import Data.Char (toLower)
+
+import XMonad (Query(), X(), withWindowSet, spawn, runQuery, liftIO, focus)
 import XMonad.ManageHook
+import XMonad.Prompt.Shell (getBrowser, getEditor)
+import qualified XMonad.StackSet as W (allWindows)
 
 {- $usage
 
@@ -39,7 +44,10 @@ and define appropriate key bindings:
 > , ((modMask x .|. shiftMask, xK_b), runOrRaise "firefox" (className =? "Firefox"))
 
 (Note that Firefox v3 and up have a class-name of "Firefox" and "Navigator";
-lower versions use other classnames such as "Firefox-bin"
+lower versions use other classnames such as "Firefox-bin". Either choose the
+appropriate one, or cover your bases by using instead something like
+ @(className =? "Firefox" <||> className =? "Firefox-bin")@.)
+
 For detailed instructions on editing your key bindings, see
 "XMonad.Doc.Extending#Editing_key_bindings". -}
 
@@ -84,3 +92,15 @@ raiseMaybe f thatUserQuery = withWindowSet $ \s -> do
     case maybeResult of
       []     -> f
       (x:_)  -> focus x
+
+-- | Given a function which gets us a String, we try to raise a window with that classname,
+--   or we then interpret that String as a executable name.
+raiseVar :: IO String -> X ()
+raiseVar getvar = liftIO getvar >>= \var -> runOrRaise var (fmap (map toLower) className =? var)
+
+-- | 'raiseBrowser' and 'raiseEditor' grab $BROWSER and $EDITOR respectively and they either
+--   take you to the specified, or they try to run it. This is most useful if your variables are simple
+--   and look like 'firefox' or 'emacs'.
+raiseBrowser, raiseEditor :: X ()
+raiseBrowser = raiseVar getBrowser
+raiseEditor  = raiseVar getEditor