Parsing: Add extractIdClass, modified type of KeyTable.

(mb21)

src/Text/Pandoc/Parsing.hs

@@ -164,7 +164,8 @@ module Text.Pandoc.Parsing ( anyLine,
                              setSourceLine,
                              newPos,
                              addWarning,
-                             (<+?>)
+                             (<+?>),
+                             extractIdClass
                              )
 where
 
@@ -1067,7 +1068,7 @@ toKey = Key . map toLower . unwords . words . unbracket
   where unbracket ('[':xs) | "]" `isSuffixOf` xs = take (length xs - 1) xs
         unbracket xs       = xs
 
-type KeyTable = M.Map Key Target
+type KeyTable = M.Map Key (Target, Attr)
 
 type SubstTable = M.Map Key Inlines
 
@@ -1264,3 +1265,14 @@ addWarning mbpos msg =
 infixr 5 <+?>
 (<+?>) :: (Monoid a, Monad m) => ParserT s st m a -> ParserT s st m a -> ParserT s st m a
 a <+?> b = a >>= flip fmap (try b <|> return mempty) . (<>)
+
+extractIdClass :: Attr -> Attr
+extractIdClass (ident, cls, kvs) = (ident', cls', kvs')
+  where
+    ident' = case (lookup "id" kvs) of
+               Just v  -> v
+               Nothing -> ident
+    cls'   = case (lookup "class" kvs) of
+               Just cl -> words cl
+               Nothing -> cls
+    kvs'  = filter (\(k,_) -> k /= "id" || k /= "class") kvs