diff --git a/src/App/Gui.hs b/src/App/Gui.hs
index 689258b..ec99aaf 100644
--- a/src/App/Gui.hs
+++ b/src/App/Gui.hs
@@ -91,6 +91,12 @@ appEvent st ev
 
 
 -- TODO Refactor parts into SyntaxChecker.hs somehow
+-- Rough idea:
+-- 1) make some monad that carries kind of markup-info
+--    state from one checker function to the next
+-- 2) call checker functions in editor
+-- 3) get (combined) markup-info from checkers
+-- 4) apply markup-info in editor function
 
 brackets :: [(Char,Char)]
 brackets = [('(',')'),('[',']'),('{','}')]