From 2230371304f299ca7333af8ad0ee7bcd099a4aa0 Mon Sep 17 00:00:00 2001
From: Alexander Krotov <ilabdsf@gmail.com>
Date: Sat, 9 Sep 2017 11:51:36 +0300
Subject: Muse reader: debug inline code markup

---
 src/Text/Pandoc/Readers/Muse.hs | 15 ++++++---------
 test/Tests/Readers/Muse.hs      | 34 ++++++++++++++++++++++++++++++++--
 2 files changed, 38 insertions(+), 11 deletions(-)

diff --git a/src/Text/Pandoc/Readers/Muse.hs b/src/Text/Pandoc/Readers/Muse.hs
index 2454057fa..3b089772f 100644
--- a/src/Text/Pandoc/Readers/Muse.hs
+++ b/src/Text/Pandoc/Readers/Muse.hs
@@ -575,13 +575,6 @@ enclosedInlines :: (PandocMonad m, Show a, Show b)
 enclosedInlines start end = try $
   trimInlinesF . mconcat <$> enclosed start end inline
 
-verbatimBetween :: PandocMonad m
-                => Char
-                -> MuseParser m String
-verbatimBetween c = try $ do
-  char c
-  many1Till anyChar $ char c
-
 inlineTag :: PandocMonad m
           => (Inlines -> Inlines)
           -> String
@@ -617,9 +610,13 @@ code = try $ do
   sp <- if sourceColumn pos == 1
           then pure mempty
           else skipMany1 spaceChar >> pure B.space
-  cd <- verbatimBetween '='
+  char '='
+  contents <- many1Till (noneOf "\n\r" <|> (newline <* notFollowedBy newline)) $ char '='
+  guard $ not $ null contents
+  guard $ head contents `notElem` " \t\n"
+  guard $ last contents `notElem` " \t\n"
   notFollowedBy nonspaceChar
-  return $ return (sp B.<> B.code cd)
+  return $ return (sp B.<> B.code contents)
 
 codeTag :: PandocMonad m => MuseParser m (F Inlines)
 codeTag = do
diff --git a/test/Tests/Readers/Muse.hs b/test/Tests/Readers/Muse.hs
index dac167a92..6f602d7c3 100644
--- a/test/Tests/Readers/Muse.hs
+++ b/test/Tests/Readers/Muse.hs
@@ -72,9 +72,39 @@ tests =
 
       , "Linebreak" =: "Line <br>  break" =?> para ("Line" <> linebreak <> "break")
 
-      , "Code" =: "=foo(bar)=" =?> para (code "foo(bar)")
+      , testGroup "Code markup"
+        [ "Code" =: "=foo(bar)=" =?> para (code "foo(bar)")
 
-      , "Not code" =: "a=b= =c=d" =?> para (text "a=b= =c=d")
+        , "Not code" =: "a=b= =c=d" =?> para (text "a=b= =c=d")
+
+        -- Emacs Muse 3.20 parses this as code, we follow Amusewiki
+        , "Not code if closing = is detached" =: "=this is not a code =" =?> para "=this is not a code ="
+
+        , "Not code if opening = is detached" =: "= this is not a code=" =?> para "= this is not a code="
+
+        , "One character code" =: "=c=" =?> para (code "c")
+
+        , "Three = characters is not a code" =: "===" =?> para "==="
+
+        , "Multiline code markup" =:
+          "foo =bar\nbaz= end of code" =?>
+          para (text "foo " <> code "bar\nbaz" <> text " end of code")
+
+{- Emacs Muse 3.20 has a bug: it publishes
+ - <p>foo <code>bar
+ -
+ - baz</code> foo</p>
+ - which is displayed as one paragraph by browsers.
+ - We follow Amusewiki here and avoid joining paragraphs.
+ -}
+        , "No multiparagraph code" =:
+          T.unlines [ "foo =bar"
+                    , ""
+                    , "baz= foo"
+                    ] =?>
+          para "foo =bar" <>
+          para "baz= foo"
+        ]
 
       , "Code tag" =: "<code>foo(bar)</code>" =?> para (code "foo(bar)")
 
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