5 files changed, 31 insertions, 20 deletions
diff --git a/src/Text/Pandoc/App.hs b/src/Text/Pandoc/App.hs
index 920462d48..a59fd9bbe 100644
--- a/src/Text/Pandoc/App.hs
+++ b/src/Text/Pandoc/App.hs
@@ -1403,6 +1403,12 @@ options =
                   "URL")
                   "" -- Use KaTeX for HTML Math
 
+    , Option "" ["gladtex"]
+                 (NoArg
+                  (\opt ->
+                      return opt { optHTMLMathMethod = GladTeX }))
+                 "" -- "Use gladtex for HTML math"
+
     , Option "" ["abbreviations"]
                 (ReqArg
                  (\arg opt -> return opt { optAbbreviations = Just arg })
diff --git a/src/Text/Pandoc/Options.hs b/src/Text/Pandoc/Options.hs
index 4797a3094..e5ca1764c 100644
--- a/src/Text/Pandoc/Options.hs
+++ b/src/Text/Pandoc/Options.hs
@@ -107,6 +107,7 @@ data EPUBVersion = EPUB2 | EPUB3 deriving (Eq, Show, Read, Data, Typeable, Gener
 
 data HTMLMathMethod = PlainMath
                     | WebTeX String               -- url of TeX->image script.
+                    | GladTeX
                     | MathML
                     | MathJax String              -- url of MathJax.js
                     | KaTeX String                -- url of KaTeX files
diff --git a/src/Text/Pandoc/Parsing.hs b/src/Text/Pandoc/Parsing.hs
index fa6baf1c7..05f4f7d36 100644
--- a/src/Text/Pandoc/Parsing.hs
+++ b/src/Text/Pandoc/Parsing.hs
@@ -1366,7 +1366,9 @@ singleQuoteStart = do
   failIfInQuoteContext InSingleQuote
   -- single quote start can't be right after str
   guard =<< notAfterString
-  () <$ charOrRef "'\8216\145"
+  try $ do
+    charOrRef "'\8216\145"
+    notFollowedBy (oneOf [' ', '\t', '\n'])
 
 singleQuoteEnd :: Stream s m Char
                => ParserT s st m ()
@@ -1379,7 +1381,7 @@ doubleQuoteStart :: (HasQuoteContext st m, Stream s m Char)
 doubleQuoteStart = do
   failIfInQuoteContext InDoubleQuote
   try $ do charOrRef "\"\8220\147"
-           notFollowedBy . satisfy $ flip elem [' ', '\t', '\n']
+           notFollowedBy (oneOf [' ', '\t', '\n'])
 
 doubleQuoteEnd :: Stream s m Char
                => ParserT s st m ()
diff --git a/src/Text/Pandoc/Readers/Org/Shared.hs b/src/Text/Pandoc/Readers/Org/Shared.hs
index 07dbeca2a..17fe34738 100644
--- a/src/Text/Pandoc/Readers/Org/Shared.hs
+++ b/src/Text/Pandoc/Readers/Org/Shared.hs
@@ -36,17 +36,18 @@ module Text.Pandoc.Readers.Org.Shared
 
 import Prelude
 import Data.Char (isAlphaNum)
-import Data.List (isPrefixOf, isSuffixOf)
+import Data.List (isPrefixOf)
+import System.FilePath (isValid, takeExtension)
 
 
 -- | Check whether the given string looks like the path to of URL of an image.
 isImageFilename :: String -> Bool
-isImageFilename filename =
-  any (\x -> ('.':x)  `isSuffixOf` filename) imageExtensions &&
-  (any (\x -> (x ++ "://") `isPrefixOf` filename) protocols ||
-   ':' `notElem` filename)
+isImageFilename fp = hasImageExtension && (isValid fp || isKnownProtocolUri)
  where
-   imageExtensions = [ "jpeg" , "jpg" , "png" , "gif" , "svg" ]
+   hasImageExtension = takeExtension fp `elem` imageExtensions
+   isKnownProtocolUri = any (\x -> (x ++ "://") `isPrefixOf` fp) protocols
+
+   imageExtensions = [ ".jpeg", ".jpg", ".png", ".gif", ".svg" ]
    protocols = [ "file", "http", "https" ]
 
 -- | Cleanup and canonicalize a string describing a link.  Return @Nothing@ if
diff --git a/src/Text/Pandoc/Writers/HTML.hs b/src/Text/Pandoc/Writers/HTML.hs
index 646168c72..a09ad2fda 100644
--- a/src/Text/Pandoc/Writers/HTML.hs
+++ b/src/Text/Pandoc/Writers/HTML.hs
@@ -58,7 +58,7 @@ import qualified Data.Text.Lazy as TL
 import Network.HTTP (urlEncode)
 import Network.URI (URI (..), parseURIReference, unEscapeString)
 import Numeric (showHex)
-import Text.Blaze.Internal (customLeaf, MarkupM(Empty))
+import Text.Blaze.Internal (customLeaf, customParent, MarkupM(Empty))
 #if MIN_VERSION_blaze_markup(0,6,3)
 #else
 import Text.Blaze.Internal (preEscapedString, preEscapedText)
@@ -665,16 +665,11 @@ blockToHtml opts (Para [Image attr@(_,classes,_) txt (src,tit)])
 -- title beginning with fig: indicates that the image is a figure
 blockToHtml opts (Para [Image attr txt (s,'f':'i':'g':':':tit)]) =
   figure opts attr txt (s,tit)
-blockToHtml opts (Para lst)
-  | isEmptyRaw lst = return mempty
-  | null lst && not (isEnabled Ext_empty_paragraphs opts) = return mempty
-  | otherwise = do
-      contents <- inlineListToHtml opts lst
-      return $ H.p contents
-  where
-    isEmptyRaw [RawInline f _] = f `notElem` [Format "html",
-                                    Format "html4", Format "html5"]
-    isEmptyRaw _               = False
+blockToHtml opts (Para lst) = do
+  contents <- inlineListToHtml opts lst
+  case contents of
+       Empty _ | not (isEnabled Ext_empty_paragraphs opts) -> return mempty
+       _ -> return $ H.p contents
 blockToHtml opts (LineBlock lns) =
   if writerWrapText opts == WrapNone
   then blockToHtml opts $ linesToPara lns
@@ -1034,6 +1029,13 @@ inlineToHtml opts inline = do
               return $ case t of
                         InlineMath  -> m
                         DisplayMath -> brtag >> m >> brtag
+           GladTeX ->
+              return $
+                customParent (textTag "eq") !
+                  customAttribute "env"
+                    (toValue $ if t == InlineMath
+                                  then ("math" :: Text)
+                                  else "displaymath") $ strToHtml str
            MathML -> do
               let conf = useShortEmptyTags (const False)
                            defaultConfigPP
@@ -1063,7 +1065,6 @@ inlineToHtml opts inline = do
       if ishtml
          then return $ preEscapedString str
          else if (f == Format "latex" || f == Format "tex") &&
-                "\\begin" `isPrefixOf` str &&
                 allowsMathEnvironments (writerHTMLMathMethod opts) &&
                 isMathEnvironment str
                 then inlineToHtml opts $ Math DisplayMath str