Handle --lhs-out option in HTML, LaTeX, and Markdown writers.

Documented lhs options in man page and README.

Note:  HTML output with --lhs-out is not strictly literate haskell,
but it is designed so that the result of copying and pasting the
page in the browser will be a literate haskell file.


git-svn-id: https://pandoc.googlecode.com/svn/trunk@1501 788f1e2b-df1e-0410-8736-df70ead52e1b

3 files changed, 14 insertions, 5 deletions

diff --git a/Text/Pandoc/Writers/HTML.hs b/Text/Pandoc/Writers/HTML.hs
index 8dafd2440..087fff623 100644
--- a/Text/Pandoc/Writers/HTML.hs
+++ b/Text/Pandoc/Writers/HTML.hs
@@ -297,6 +297,10 @@ blockToHtml opts (Plain lst) = inlineListToHtml opts lst
 blockToHtml opts (Para lst) = inlineListToHtml opts lst >>= (return . paragraph)
 blockToHtml _ (RawHtml str) = return $ primHtml str
 blockToHtml _ (HorizontalRule) = return $ hr
+blockToHtml opts (CodeBlock (_,classes,_) rawCode) | "haskell" `elem` classes &&
+                                                          writerLiterateHaskell opts =
+  let classes' = map (\c -> if c == "haskell" then "literatehaskell" else c) classes
+  in  blockToHtml opts $ CodeBlock ("",classes',[]) $ intercalate "\n" $ map ("> " ++) $ lines rawCode
 blockToHtml _ (CodeBlock attr@(_,classes,_) rawCode) = do
   case highlightHtml attr rawCode of
          Left _  -> -- change leading newlines into <br /> tags, because some
diff --git a/Text/Pandoc/Writers/LaTeX.hs b/Text/Pandoc/Writers/LaTeX.hs
index dd0e23981..f3cbf1acb 100644
--- a/Text/Pandoc/Writers/LaTeX.hs
+++ b/Text/Pandoc/Writers/LaTeX.hs
@@ -147,12 +147,14 @@ blockToLaTeX (Para lst) = do
 blockToLaTeX (BlockQuote lst) = do
   contents <- blockListToLaTeX lst
   return $ text "\\begin{quote}" $$ contents $$ text "\\end{quote}"
-blockToLaTeX (CodeBlock _ str) = do
+blockToLaTeX (CodeBlock (_,classes,_) str) = do
   st <- get
-  env <- if stInNote st
-            then do addToHeader "\\usepackage{fancyvrb}"
-                    return "Verbatim"
-            else return "verbatim"
+  env <- if writerLiterateHaskell (stOptions st) && "haskell" `elem` classes
+            then return "code"
+            else if stInNote st
+                    then do addToHeader "\\usepackage{fancyvrb}"
+                            return "Verbatim"
+                    else return "verbatim"
   return $ text ("\\begin{" ++ env ++ "}\n") <> text str <> 
            text ("\n\\end{" ++ env ++ "}")
 blockToLaTeX (RawHtml _) = return empty
diff --git a/Text/Pandoc/Writers/Markdown.hs b/Text/Pandoc/Writers/Markdown.hs
index 32ebcf758..4b365773f 100644
--- a/Text/Pandoc/Writers/Markdown.hs
+++ b/Text/Pandoc/Writers/Markdown.hs
@@ -185,6 +185,9 @@ blockToMarkdown _ HorizontalRule = return $ text "\n* * * * *\n"
 blockToMarkdown opts (Header level inlines) = do
   contents <- inlineListToMarkdown opts inlines
   return $ text ((replicate level '#') ++ " ") <> contents <> text "\n"
+blockToMarkdown opts (CodeBlock (_,classes,_) str) | "haskell" `elem` classes &&
+                                                     writerLiterateHaskell opts =
+  return $ (vcat $ map (text "> " <>) $ map text (lines str)) <> text "\n"
 blockToMarkdown opts (CodeBlock _ str) = return $
   (nest (writerTabStop opts) $ vcat $ map text (lines str)) <> text "\n"
 blockToMarkdown opts (BlockQuote blocks) = do