Added basic support for reveal.js.

Support unordered and ordered lists with "fragment" elements.

Modified by JGM to remove the --reveal_js-url command-line option.
Instead use -V reveal_js-url=... as with slidy and the other slide
formats.  Also cleaned up the list code in the HTML writer.

data/templates

@@ -1 +1 @@
-Subproject commit 7ac22fea6399ce6fdac093fa9d163d09fc28d440
+Subproject commit 85ec1ef277e914576af176b5ab43bcc27fa51936

pandoc.hs

@@ -1113,7 +1113,7 @@ main = do
                       >>= writerFn outputFile . handleEntities
           where htmlFormat = writerName' `elem`
                                ["html","html+lhs","html5","html5+lhs",
-                               "s5","slidy","slideous","dzslides"]
+                               "s5","slidy","slideous","dzslides","reveal_js"]
                 selfcontain = if selfContained && htmlFormat
                                  then makeSelfContained datadir
                                  else return

src/Text/Pandoc.hs

@@ -231,6 +231,9 @@ writers = [
   ,("dzslides"     , PureStringWriter $ \o ->
      writeHtmlString o{ writerSlideVariant = DZSlides
                       , writerHtml5 = True })
+  ,("reveal_js"     , PureStringWriter $ \o ->
+     writeHtmlString o{ writerSlideVariant = RevealJsSlides
+                      , writerHtml5 = True })
   ,("docbook"      , PureStringWriter writeDocbook)
   ,("opml"         , PureStringWriter writeOPML)
   ,("opendocument" , PureStringWriter writeOpenDocument)

src/Text/Pandoc/Options.hs

@@ -255,6 +255,7 @@ data HTMLSlideVariant = S5Slides
                       | SlidySlides
                       | SlideousSlides
                       | DZSlides
+                      | RevealJsSlides
                       | NoSlides
                       deriving (Show, Read, Eq)
 

src/Text/Pandoc/Slides.hs

@@ -26,7 +26,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    Portability : portable
 
 Utility functions for splitting documents into slides for slide
-show formats (dzslides, s5, slidy, slideous, beamer).
+show formats (dzslides, reveal_js, s5, slidy, slideous, beamer).
 -}
 module Text.Pandoc.Slides ( getSlideLevel, prepSlides ) where
 import Text.Pandoc.Definition

src/Text/Pandoc/Writers/HTML.hs

@@ -224,13 +224,20 @@ prefixedId opts s =
     ""       -> mempty
     _        -> A.id $ toValue $ writerIdentifierPrefix opts ++ s
 
--- | Replacement for Text.XHtml's unordList.
-unordList :: WriterOptions -> ([Html] -> Html)
-unordList opts items = H.ul $ mconcat $ toListItems opts items
+toList :: (Html -> Html) -> WriterOptions -> ([Html] -> Html)
+toList listop opts items = do
+    let items' = toListItems opts items
+    if (writerIncremental opts)
+       then if (writerSlideVariant opts /= RevealJsSlides)
+               then (listop $ mconcat items') ! A.class_ "incremental"
+               else listop $ mconcat $ map (! A.class_ "fragment") items'
+       else listop $ mconcat items'
 
--- | Replacement for Text.XHtml's ordList.
-ordList :: WriterOptions -> ([Html] -> Html)
-ordList opts items = H.ol $ mconcat $ toListItems opts items
+unordList :: WriterOptions -> [Html] -> Html
+unordList = toList H.ul
+
+ordList :: WriterOptions -> [Html] -> Html
+ordList = toList H.ol
 
 -- | Construct table of contents from list of elements.
 tableOfContents :: WriterOptions -> [Element] -> State WriterState (Maybe Html)
@@ -476,18 +483,11 @@ blockToHtml opts (Header level (ident,_,_) lst) = do
               _ -> H.p contents''
 blockToHtml opts (BulletList lst) = do
   contents <- mapM (blockListToHtml opts) lst
-  let lst' = unordList opts contents
-  let lst'' = if writerIncremental opts
-                 then lst' ! A.class_ "incremental"
-                 else lst'
-  return lst''
+  return $ unordList opts contents
 blockToHtml opts (OrderedList (startnum, numstyle, _) lst) = do
   contents <- mapM (blockListToHtml opts) lst
   let numstyle' = camelCaseToHyphenated $ show numstyle
-  let attribs = (if writerIncremental opts
-                   then [A.class_ "incremental"]
-                   else []) ++
-                (if startnum /= 1
+  let attribs = (if startnum /= 1
                    then [A.start $ toValue startnum]
                    else []) ++
                 (if numstyle /= DefaultStyle