Muse: add RTL support

Closes #5551

1 files changed, 12 insertions, 0 deletions

diff --git a/src/Text/Pandoc/Readers/Muse.hs b/src/Text/Pandoc/Readers/Muse.hs
index 568287929..ca7c94245 100644
--- a/src/Text/Pandoc/Readers/Muse.hs
+++ b/src/Text/Pandoc/Readers/Muse.hs
@@ -746,6 +746,8 @@ inline' = whitespace
       <|> strikeoutTag
       <|> verbatimTag
       <|> classTag
+      <|> inlineRtl
+      <|> inlineLtr
       <|> nbsp
       <|> linkOrImage
       <|> code
@@ -863,6 +865,16 @@ classTag = do
   classes <- maybe [] words . lookup "name" <$> openTag "class"
   fmap (B.spanWith ("", classes, [])) . mconcat <$> manyTill inline (closeTag "class")
 
+-- | Parse @\<\<\<RTL>>>@ text.
+inlineRtl :: PandocMonad m => MuseParser m (F Inlines)
+inlineRtl = try $
+  fmap (B.spanWith ("", [], [("dir", "rtl")])) . mconcat <$ string "<<<" <*> manyTill inline (string ">>>")
+
+-- | Parse @\<\<\<LTR>>>@ text.
+inlineLtr :: PandocMonad m => MuseParser m (F Inlines)
+inlineLtr = try $
+  fmap (B.spanWith ("", [], [("dir", "ltr")])) . mconcat <$ string ">>>" <*> manyTill inline (string "<<<")
+
 -- | Parse "~~" as nonbreaking space.
 nbsp :: PandocMonad m => MuseParser m (F Inlines)
 nbsp = try $ pure (B.str "\160") <$ string "~~"