HTML, LaTeX writer: Don't print header row in headerless table.

Resolves Issue #210.

git-svn-id: https://pandoc.googlecode.com/svn/trunk@1856 788f1e2b-df1e-0410-8736-df70ead52e1b

src/Text/Pandoc/Writers/HTML.hs

@@ -346,8 +346,7 @@ blockToHtml opts (Table capt aligns widths headers rows') = do
   captionDoc <- if null capt
                    then return noHtml
                    else inlineListToHtml opts capt >>= return . caption
-  colHeads <- colHeadsToHtml opts alignStrings 
-                             widths headers
+  colHeads <- colHeadsToHtml opts alignStrings widths headers
   rows'' <- zipWithM (tableRowToHtml opts alignStrings) (cycle ["odd", "even"]) rows'
   return $ table $ captionDoc +++ colHeads +++ rows''
 
@@ -356,6 +355,7 @@ colHeadsToHtml :: WriterOptions
                -> [Double]
                -> [[Block]]
                -> State WriterState Html
+colHeadsToHtml _ _ _ headers | all null headers = return noHtml
 colHeadsToHtml opts alignStrings widths headers = do
   heads <- sequence $ zipWith3 
            (\alignment columnwidth item -> tableItemToHtml opts th alignment columnwidth item) 

src/Text/Pandoc/Writers/LaTeX.hs

@@ -213,13 +213,14 @@ blockToLaTeX (Header level lst) = do
                 (False, 3)   -> text "\\subsubsection" <> stuffing <> char '\n'
                 _            -> txt <> char '\n' 
 blockToLaTeX (Table caption aligns widths heads rows) = do
-  headers <- tableRowToLaTeX heads
+  headers <- if all null heads
+                then return empty
+                else liftM ($$ text "\\hline") $ tableRowToLaTeX heads
   captionText <- inlineListToLaTeX caption
   rows' <- mapM tableRowToLaTeX rows
   let colDescriptors = concat $ zipWith toColDescriptor widths aligns
   let tableBody = text ("\\begin{tabular}{" ++ colDescriptors ++ "}") $$
-                  headers $$ text "\\hline" $$ vcat rows' $$ 
-                  text "\\end{tabular}" 
+                  headers $$ vcat rows' $$ text "\\end{tabular}" 
   let centered txt = text "\\begin{center}" $$ txt $$ text "\\end{center}"
   modify $ \s -> s{ stTable = True }
   return $ if isEmpty captionText