Use new flexible metadata type.

* Depend on pandoc 1.12.
* Added yaml dependency.
* `Text.Pandoc.XML`: Removed `stripTags`.  (API change.)
* `Text.Pandoc.Shared`:  Added `metaToJSON`.
  This will be used in writers to create a JSON object for use
  in the templates from the pandoc metadata.
* Revised readers and writers to use the new Meta type.
* `Text.Pandoc.Options`: Added `Ext_yaml_title_block`.
* Markdown reader:  Added support for YAML metadata block.
  Note that it must come at the beginning of the document.
* `Text.Pandoc.Parsing.ParserState`:  Replace `stateTitle`,
  `stateAuthors`, `stateDate` with `stateMeta`.
* RST reader:  Improved metadata.
  Treat initial field list as metadata when standalone specified.
  Previously ALL fields "title", "author", "date" in field lists
  were treated as metadata, even if not at the beginning.
  Use `subtitle` metadata field for subtitle.
* `Text.Pandoc.Templates`:  Export `renderTemplate'` that takes a string
  instead of a compiled template..
* OPML template:  Use 'for' loop for authors.
* Org template: '#+TITLE:' is inserted before the title.
  Previously the writer did this.

1 files changed, 8 insertions, 4 deletions

diff --git a/src/Text/Pandoc/Writers/Textile.hs b/src/Text/Pandoc/Writers/Textile.hs
index 6a3f2fea5..58d1a3a95 100644
--- a/src/Text/Pandoc/Writers/Textile.hs
+++ b/src/Text/Pandoc/Writers/Textile.hs
@@ -33,7 +33,7 @@ module Text.Pandoc.Writers.Textile ( writeTextile ) where
 import Text.Pandoc.Definition
 import Text.Pandoc.Options
 import Text.Pandoc.Shared
-import Text.Pandoc.Templates (renderTemplate)
+import Text.Pandoc.Templates (renderTemplate')
 import Text.Pandoc.XML ( escapeStringForXML )
 import Data.List ( intercalate )
 import Control.Monad.State
@@ -53,13 +53,17 @@ writeTextile opts document =
 
 -- | Return Textile representation of document.
 pandocToTextile :: WriterOptions -> Pandoc -> State WriterState String
-pandocToTextile opts (Pandoc _ blocks) = do
+pandocToTextile opts (Pandoc meta blocks) = do
+  metadata <- metaToJSON
+               (blockListToTextile opts) (inlineListToTextile opts) meta
   body <- blockListToTextile opts blocks
   notes <- liftM (unlines . reverse . stNotes) get
   let main = body ++ if null notes then "" else ("\n\n" ++ notes)
-  let context = writerVariables opts ++ [ ("body", main) ]
+  let context = setField "body" main
+                $ foldl (\acc (x,y) -> setField x y acc)
+                     metadata (writerVariables opts)
   if writerStandalone opts
-     then return $ renderTemplate context $ writerTemplate opts
+     then return $ renderTemplate' (writerTemplate opts) context
      else return main
 
 withUseTags :: State WriterState a -> State WriterState a