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+doc for WindowGo.hs: I've discovered a common usecase for me for raiseMaybe

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gwern0 2008-02-05 03:21:55 +00:00
parent 14792eb6cc
commit 37748e0b26
1 changed files with 8 additions and 1 deletions
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XMonad/Actions/WindowGo.hs
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@ -65,7 +65,14 @@ raise = raiseMaybe $ return ()
the desired program if it isn't found. But you don't have to do that. Maybe the desired program if it isn't found. But you don't have to do that. Maybe
you want to do nothing if the search fails (the definition of 'raise'), or you want to do nothing if the search fails (the definition of 'raise'), or
maybe you want to write to a log file, or call some prompt function, or maybe you want to write to a log file, or call some prompt function, or
something crazy like that. This hook gives you that flexibility. something crazy like that. This hook gives you that flexibility. You can do
some cute things with this hook. Suppose you want to do the same thing for
Mutt which you just did for Firefox - but Mutt runs inside a terminal window?
No problem: you search for a terminal window calling itself 'mutt', and if
there isn't you run a terminal with a command to run mutt! Here's an example,
borrowing 'runInTerm' from XMonad.Utils.Run:
> , ((modm, xK_m ), raiseMaybe (runInTerm -title "mutt" "mutt") (title =? "mutt"))
-} -}
raiseMaybe :: X () -> Query Bool -> X () raiseMaybe :: X () -> Query Bool -> X ()
raiseMaybe f thatUserQuery = withWindowSet $ \s -> do raiseMaybe f thatUserQuery = withWindowSet $ \s -> do