From 9bcd0908482f26e3630a02e3ad3596a2f67fcab9 Mon Sep 17 00:00:00 2001
From: Alexander Krotov <ilabdsf@gmail.com>
Date: Sat, 10 Mar 2018 07:27:24 +0300
Subject: Muse reader: parse <class> tag

<class> tag is supported by Emacs Muse
---
 src/Text/Pandoc/Readers/Muse.hs | 8 ++++++++
 test/Tests/Readers/Muse.hs      | 3 +++
 2 files changed, 11 insertions(+)

diff --git a/src/Text/Pandoc/Readers/Muse.hs b/src/Text/Pandoc/Readers/Muse.hs
index 4c398080c..3e642b386 100644
--- a/src/Text/Pandoc/Readers/Muse.hs
+++ b/src/Text/Pandoc/Readers/Muse.hs
@@ -756,6 +756,7 @@ inlineList = [ whitespace
              , subscriptTag
              , strikeoutTag
              , verbatimTag
+             , classTag
              , nbsp
              , link
              , code
@@ -858,6 +859,13 @@ strikeoutTag = inlineTag B.strikeout "del"
 verbatimTag :: PandocMonad m => MuseParser m (F Inlines)
 verbatimTag = return . B.text . snd <$> htmlElement "verbatim"
 
+classTag :: PandocMonad m => MuseParser m (F Inlines)
+classTag = do
+  (TagOpen _ attrs, _) <- htmlTag (~== TagOpen "class" [])
+  res <- manyTill inline (void $ htmlTag (~== TagClose "class"))
+  let classes = maybe [] words $ lookup "name" attrs
+  return $ B.spanWith ("", classes, []) <$> mconcat res
+
 nbsp :: PandocMonad m => MuseParser m (F Inlines)
 nbsp = try $ do
   string "~~"
diff --git a/test/Tests/Readers/Muse.hs b/test/Tests/Readers/Muse.hs
index 9fa79234b..01e8d7b85 100644
--- a/test/Tests/Readers/Muse.hs
+++ b/test/Tests/Readers/Muse.hs
@@ -173,6 +173,9 @@ tests =
 
       , "Verbatim tag after text" =: "Foo <verbatim>bar</verbatim>" =?> para "Foo bar"
 
+      , "Class tag" =: "<class name=\"foo\">bar</class>" =?> para (spanWith ("", ["foo"], []) "bar")
+      , "Class tag without name" =: "<class>foobar</class>" =?> para (spanWith ("", [], []) "foobar")
+
       -- <em> tag should match with the last </em> tag, not verbatim one
       , "Nested \"</em>\" inside em tag" =: "<em>foo<verbatim></em></verbatim>bar</em>" =?> para (emph ("foo</em>bar"))
 
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