Options: Added phpMarkdownExtraExtensions.

And added markdown_phpextra input/output format.

README

@@ -140,6 +140,7 @@ General options
 :   Specify input format.  *FORMAT* can be `native` (native Haskell),
     `json` (JSON version of native AST), `markdown` (pandoc's
     extended markdown), `markdown_strict` (original unextended markdown),
+    `markdown_phpextra` (PHP Markdown Extra extended markdown),
     `textile` (Textile), `rst` (reStructuredText), `html` (HTML),
     `docbook` (DocBook XML), `mediawiki` (MediaWiki markup),
     or `latex` (LaTeX). If `+lhs` is appended to `markdown`, `rst`,
@@ -158,7 +159,8 @@ General options
 :   Specify output format.  *FORMAT* can be `native` (native Haskell),
     `json` (JSON version of native AST), `plain` (plain text),
     `markdown` (pandoc's extended markdown), `markdown_strict` (original
-    unextended markdown), `rst` (reStructuredText), `html` (XHTML
+    unextended markdown), `markdown_phpextra` (PHP Markdown extra
+    extended markdown), `rst` (reStructuredText), `html` (XHTML
     1), `html5` (HTML 5), `latex` (LaTeX), `beamer` (LaTeX beamer slide show),
     `context` (ConTeXt), `man` (groff man), `mediawiki` (MediaWiki markup),
     `textile` (Textile), `org` (Emacs Org-Mode), `texinfo` (GNU Texinfo),

pandoc.hs

@@ -703,11 +703,6 @@ options =
 
     ]
 
-readExtension :: String -> IO Extension
-readExtension s = case safeRead ('E':'x':'t':'_':map toLower s) of
-                       Just ext -> return ext
-                       Nothing  -> err 59 $ "Unknown extension: " ++ s
-
 -- Returns usage message
 usageMessage :: String -> [OptDescr (Opt -> IO Opt)] -> String
 usageMessage programName = usageInfo

src/Text/Pandoc.hs

@@ -174,19 +174,20 @@ parseFormatSpec = parse formatSpec ""
                         '-'  -> Set.delete ext
                         _    -> Set.insert ext
 
+-- auxiliary function for readers:
+markdown :: ReaderOptions -> String -> IO Pandoc
+markdown o s = do
+  let (doc, warnings) = readMarkdownWithWarnings o s
+  mapM_ warn warnings
+  return doc
+
 -- | Association list of formats and readers.
 readers :: [(String, ReaderOptions -> String -> IO Pandoc)]
 readers = [("native"       , \_ s -> return $ readNative s)
           ,("json"         , \_ s -> return $ decodeJSON s)
-          ,("markdown_strict" , \o s -> do
-                             let (doc, warnings) = readMarkdownWithWarnings
-                                     o{ readerExtensions = strictExtensions  } s
-                             mapM_ warn warnings
-                             return doc)
-          ,("markdown"     , \o s -> do
-                             let (doc, warnings) = readMarkdownWithWarnings o s
-                             mapM_ warn warnings
-                             return doc)
+          ,("markdown"     , markdown)
+          ,("markdown_strict" , markdown)
+          ,("markdown_phpextra" , markdown)
           ,("rst"          , \o s -> return $ readRST o s)
           ,("mediawiki"    , \o s -> return $ readMediaWiki o s)
           ,("docbook"      , \o s -> return $ readDocBook o s)
@@ -245,6 +246,7 @@ writers = [
 
 getDefaultExtensions :: String -> Set Extension
 getDefaultExtensions "markdown_strict" = strictExtensions
+getDefaultExtensions "markdown_phpextra" = phpMarkdownExtraExtensions
 getDefaultExtensions _        = pandocExtensions
 
 -- | Retrieve reader based on formatSpec (format+extensions).

src/Text/Pandoc/Options.hs

@@ -31,6 +31,7 @@ options.
 module Text.Pandoc.Options ( Extension(..)
                            , pandocExtensions
                            , strictExtensions
+                           , phpMarkdownExtraExtensions
                            , ReaderOptions(..)
                            , HTMLMathMethod (..)
                            , CiteMethod (..)
@@ -134,6 +135,19 @@ pandocExtensions = Set.fromList
   , Ext_implicit_header_references
   ]
 
+phpMarkdownExtraExtensions :: Set Extension
+phpMarkdownExtraExtensions = Set.fromList
+  [ Ext_footnotes
+  , Ext_pipe_tables
+  , Ext_raw_html
+  , Ext_markdown_attribute
+  , Ext_fenced_code_blocks
+  , Ext_definition_lists
+  , Ext_intraword_underscores
+  , Ext_header_attributes
+  , Ext_abbreviations
+  ]
+
 strictExtensions :: Set Extension
 strictExtensions = Set.fromList
   [ Ext_raw_html ]