html inlines and html blocks handling in textile reader

src/Text/Pandoc/Readers/Textile.hs

@@ -28,7 +28,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 Conversion from Textile to 'Pandoc' document, based on the spec
 available at ahttp://redcloth.org/hobix.com/textile/
 
-Implemented and parsed :
+Implemented and parsed:
  - Paragraphs
  - Code blocks
  - Lists
@@ -36,8 +36,14 @@ Implemented and parsed :
  - Inlines : strong, emph, cite, code, deleted, superscript,
    subscript, links
 
-Implemented but discarded :
+Implemented but discarded:
  - HTML-specific and CSS-specific attributes
+
+Left to be implemented:
+ - Pandoc Meta Information (title, author, date)
+ - footnotes
+ - should autolink be shared through Parsing.hs ?
+
 -}
 
 
@@ -47,7 +53,8 @@ module Text.Pandoc.Readers.Textile (
 import Text.Pandoc.Definition
 import Text.Pandoc.Shared 
 import Text.Pandoc.Parsing
-import Text.Pandoc.Readers.HTML ( htmlTag, htmlEndTag )
+import Text.Pandoc.Readers.HTML ( htmlTag, htmlEndTag, -- find code blocks
+                                  rawHtmlBlock, rawHtmlInline )
 import Text.ParserCombinators.Parsec
 import Data.Char ( digitToInt )
 
@@ -83,6 +90,7 @@ blockParsers = [ codeBlock
                , header
                , blockQuote
                , anyList
+               , rawHtmlBlock'
                , maybeExplicitBlock "table" table
                , maybeExplicitBlock "p" para
                , nullBlock ]
@@ -170,10 +178,19 @@ orderedListItemAtDepth depth = try $ do
   sublist <- option [] (anyListAtDepth (depth + 1) >>= return . (:[]))
   return (p:sublist)
 
--- | This terminates a block such as a paragraph.
+-- | This terminates a block such as a paragraph. Because of raw html
+-- blocks support, we have to lookAhead for a rawHtmlBlock.
 blockBreak :: GenParser Char ParserState ()
-blockBreak = try $ newline >> blanklines >> return ()
+blockBreak = try $ choice 
+             [newline >> blanklines >> return (),
+              lookAhead rawHtmlBlock' >> return ()]
 
+-- | A raw Html Block, optionally followed by blanklines
+rawHtmlBlock' :: GenParser Char ParserState Block
+rawHtmlBlock' = try $ do
+  b <- rawHtmlBlock
+  optional blanklines
+  return b
 
 -- | In textile, paragraphs are separated by blank lines.
 para :: GenParser Char ParserState Block
@@ -260,6 +277,7 @@ inlineParsers = [ autoLink
                 , str
                 , whitespace
                 , endline
+                , rawHtmlInline
                 , code
                 , simpleInline (string "??") (Cite [])
                 , simpleInline (string "**") Strong
@@ -322,7 +340,6 @@ code :: GenParser Char ParserState Inline
 code = surrounded (char '@') anyChar >>= 
        return . Code
 
-
 -- | Html / CSS attributes
 attributes :: GenParser Char ParserState String
 attributes = choice [ enclosed (char '(') (char ')') anyChar,
@@ -342,11 +359,3 @@ simpleInline :: GenParser Char ParserState t           -- ^ surrounding parser
 simpleInline border construct = surrounded border (inlineWithAttribute) >>=
                                 return . construct . normalizeSpaces
   where inlineWithAttribute = (try $ optional attributes) >> inline
-
-
--- TODO
--- 
---  - Pandoc Meta Information (title, author, date)
---  - footnotes
---  - should autolink be shared through Parsing.hs ?
---  - embeded HTML, both inlines and blocks

tests/textile-reader.native

@@ -113,4 +113,18 @@ Pandoc (Meta {docTitle = [Str ""], docAuthors = [[Str ""]], docDate = [Str ""]})
   , [ Plain [Str "sex"] ] ],
   [ [ Plain [Str "joan"] ]
   , [ Plain [Str "24"] ]
-  , [ Plain [Str "f"] ] ] ] ]
+  , [ Plain [Str "f"] ] ] ]
+, Header 1 [Str "Raw",Space,Str "HTML"]
+, Para [Str "However,",Space,HtmlInline "<strong>",Space,Str "raw",Space,Str "HTML",Space,Str "inlines",Space,HtmlInline "</strong>",Space,Str "are",Space,Str "accepted,",Space,Str "as",Space,Str "well",Space,Str "as",Space,Str ":"]
+, RawHtml "<div class=\"foobar\">"
+, Para [Str "any",Space,Strong [Str "Raw",Space,Str "HTML",Space,Str "Block"],Space,Str "with",Space,Str "bold"]
+, RawHtml "</div>"
+, Para [Str "Html",Space,Str "blocks",Space,Str "can",Space,Str "be"]
+, RawHtml "<div>"
+, Para [Str "inlined"]
+, RawHtml "</div>"
+, Para [Str "as",Space,Str "well."]
+, BulletList
+  [ [ Plain [Str "this",Space,Str "<",Str "div",Str ">",Space,Str "won",Str "'",Str "t",Space,Str "produce",Space,Str "raw",Space,Str "html",Space,Str "blocks",Space,Str "<",Str "/div",Str ">"] ]
+  , [ Plain [Str "but",Space,Str "this",Space,HtmlInline "<strong>",Space,Str "will",Space,Str "produce",Space,Str "inline",Space,Str "html",Space,HtmlInline "</strong>"] ] ]
+, Para [Str "Can",Space,Str "you",Space,Str "prove",Space,Str "that",Space,Str "2",Space,Str "<",Space,Str "3",Space,Str "?"] ]

tests/textile-reader.textile

@@ -161,3 +161,18 @@ p{color:green}. and paragraph attributes, and table attributes.
 table{foo:bar}.
 | name   | age | sex |
 | joan   | 24  | f   |
+
+h1. Raw HTML
+
+However, <strong> raw HTML inlines </strong> are accepted, as well as :
+
+<div class="foobar">
+  any *Raw HTML Block* with bold
+</div>
+
+Html blocks can be <div>inlined</div> as well. 
+
+* this <div> won't produce raw html blocks </div>
+* but this <strong> will produce inline html </strong>
+
+Can you prove that 2 < 3 ?