Added support for Cite to Markdown reader, and conditional support for citeproc module.

+ The citeproc cabal configuration option sets the _CITEPROC macro, which conditionally
  includes code for handling citations.
+ Added Text.Pandoc.Biblio module.
+ Made highlighting option default to False.


git-svn-id: https://pandoc.googlecode.com/svn/trunk@1376 788f1e2b-df1e-0410-8736-df70ead52e1b

5 files changed, 127 insertions, 2 deletions

diff --git a/Text/Pandoc/Biblio.hs b/Text/Pandoc/Biblio.hs
new file mode 100644
index 000000000..f39b6a608
--- /dev/null
+++ b/Text/Pandoc/Biblio.hs
@@ -0,0 +1,76 @@
+{-# LANGUAGE PatternGuards, CPP #-}
+{-
+Copyright (C) 2008 Andrea Rossato <andrea.rossato@ing.unitn.it>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+-}
+
+{- |
+   Module      : Text.Pandoc.Biblio
+   Copyright   : Copyright (C) 2008 Andrea Rossato
+   License     : GNU GPL, version 2 or above
+
+   Maintainer  : Andrea Rossato <andrea.rossato@ing.unitn.it>
+   Stability   : alpha
+   Portability : portable
+-}
+
+#ifdef _CITEPROC
+module Text.Pandoc.Biblio ( processBiblio ) where
+
+import Control.Monad ( when )
+import Data.List
+import Text.CSL
+import Text.Pandoc.Definition
+
+#else
+module Text.Pandoc.Biblio () where
+#endif
+
+#ifdef _CITEPROC
+processBiblio :: String -> [Reference] -> Pandoc -> IO Pandoc
+processBiblio cf r p
+    = if null r then return p
+      else do
+        when (null cf) $ error "Missing the needed citation style file"
+        csl  <- readCSLFile cf
+        let groups     = queryPandoc getCite p
+            citations  = zip groups . processCitations csl r $ groups
+            Pandoc m b = processPandoc (processCite citations) p
+        return $ Pandoc m $ b ++ renderBiblio csl r p
+
+renderBiblio :: Style -> [Reference] -> Pandoc -> [Block]
+renderBiblio s r p
+    = map (read . renderPandoc') $ processBibliography s refs
+      where cits = nub . map fst . concat . queryPandoc getCite $ p
+            refs = getRefs r $ zip cits (repeat "")
+
+processCite :: [([Target],[FormattedOutput])] -> Inline -> Inline
+processCite cs il
+    | Cite t _ <- il = Cite t (process t)
+    | otherwise      = il
+    where
+      process t = case elemIndex t (map fst cs) of
+                    Just i -> read . renderPandoc $ snd (cs !! i)
+                    Nothing -> [Str ("Error processing " ++ show t)]
+
+getCite :: Inline -> [[(String,String)]]
+getCite i | Cite t _ <- i = [t]
+          | otherwise     = []
+
+getRefs :: [Reference] -> [Target] -> [Reference]
+getRefs r = map $ getReference r
+
+#endif
diff --git a/Text/Pandoc/Definition.hs b/Text/Pandoc/Definition.hs
index f302f0dbd..7fc04f698 100644
--- a/Text/Pandoc/Definition.hs
+++ b/Text/Pandoc/Definition.hs
@@ -125,8 +125,10 @@ data Inline
     | Note [Block]          -- ^ Footnote or endnote 
     deriving (Show, Eq, Read, Typeable, Data)
 
+-- | Applies a transformation to matching elements in a Pandoc document.
 processPandoc :: Typeable a => (a -> a) -> Pandoc -> Pandoc
 processPandoc f = everywhere (mkT f)
 
+-- | Runs a query on matching elements in a Pandoc document. 
 queryPandoc :: Typeable a => (a -> [b]) -> Pandoc -> [b]
 queryPandoc f = everything (++) ([] `mkQ` f)
diff --git a/Text/Pandoc/Readers/Markdown.hs b/Text/Pandoc/Readers/Markdown.hs
index 712d66a37..2bf53684f 100644
--- a/Text/Pandoc/Readers/Markdown.hs
+++ b/Text/Pandoc/Readers/Markdown.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-
 Copyright (C) 2006-8 John MacFarlane <jgm@berkeley.edu>
 
@@ -34,7 +35,7 @@ module Text.Pandoc.Readers.Markdown (
 import Data.List ( transpose, isPrefixOf, isSuffixOf, lookup, sortBy, findIndex )
 import Data.Ord ( comparing )
 import Data.Char ( isAlphaNum, isAlpha, isLower, isDigit )
-import Data.Maybe ( fromMaybe )
+import Data.Maybe
 import Text.Pandoc.Definition
 import Text.Pandoc.Shared 
 import Text.Pandoc.Readers.LaTeX ( rawLaTeXInline, rawLaTeXEnvironment )
@@ -173,7 +174,7 @@ parseMarkdown = do
              setPosition startPos
   -- now parse it for real...
   (title, author, date) <- option ([],[],"") titleBlock
-  blocks <- parseBlocks 
+  blocks <- parseBlocks
   return $ Pandoc (Meta title author date) $ filter (/= Null) blocks
 
 -- 
@@ -804,6 +805,9 @@ inlineParsers = [ abbrev
                 , note
                 , inlineNote
                 , link
+#ifdef _CITEPROC
+                , inlineCitation
+#endif
                 , image
                 , math
                 , strikeout
@@ -1152,3 +1156,38 @@ rawHtmlInline' = do
                else anyHtmlInlineTag
   return $ HtmlInline result
 
+#ifdef _CITEPROC
+inlineCitation :: GenParser Char ParserState Inline
+inlineCitation = try $ do
+  failIfStrict
+  cit <- citeMarker
+  let citations = readWith parseCitation defaultParserState cit
+  mr <- mapM chkCit citations
+  if catMaybes mr /= []
+     then return $ Cite citations []
+     else fail "no citation found"
+
+chkCit :: Target -> GenParser Char ParserState (Maybe Target)
+chkCit t = do
+  st <- getState
+  case lookupKeySrc (stateKeys st) [Str $ fst t] of
+     Just  _ -> fail "This is a link"
+     Nothing -> if elem (fst t) $ stateCitations st
+                then return $ Just t
+                else return $ Nothing
+
+citeMarker :: GenParser Char ParserState String
+citeMarker = string "[" >> manyTill (noneOf "\t\n") (string "]")
+
+parseCitation :: GenParser Char ParserState [(String,String)]
+parseCitation = try $ sepBy (parseLabel) (oneOf ";")
+
+parseLabel :: GenParser Char ParserState (String,String)
+parseLabel = try $ do
+  res <- sepBy (skipSpaces >> many1 (noneOf "@;\n\t")) (oneOf "@")
+  case res of
+    [lab,loc] -> return (lab, loc)
+    [lab]     -> return (lab, "" )
+    _         -> return ("" , "" )
+
+#endif
diff --git a/Text/Pandoc/Shared.hs b/Text/Pandoc/Shared.hs
index 6ae507cfa..bc0791d77 100644
--- a/Text/Pandoc/Shared.hs
+++ b/Text/Pandoc/Shared.hs
@@ -629,6 +629,9 @@ data ParserState = ParserState
       stateQuoteContext    :: QuoteContext,  -- ^ Inside quoted environment?
       stateSanitizeHTML    :: Bool,          -- ^ Sanitize HTML?
       stateKeys            :: KeyTable,      -- ^ List of reference keys
+#ifdef _CITEPROC
+      stateCitations       :: [String],      -- ^ List of available citations
+#endif
       stateNotes           :: NoteTable,     -- ^ List of notes
       stateTabStop         :: Int,           -- ^ Tab stop
       stateStandalone      :: Bool,          -- ^ Parse bibliographic info?
@@ -649,6 +652,9 @@ defaultParserState =
                   stateQuoteContext    = NoQuote,
                   stateSanitizeHTML    = False,
                   stateKeys            = [],
+#ifdef _CITEPROC
+                  stateCitations       = [],
+#endif
                   stateNotes           = [],
                   stateTabStop         = 4,
                   stateStandalone      = False,
diff --git a/Text/Pandoc/Writers/MediaWiki.hs b/Text/Pandoc/Writers/MediaWiki.hs
index 14df15bfe..97d9d00c6 100644
--- a/Text/Pandoc/Writers/MediaWiki.hs
+++ b/Text/Pandoc/Writers/MediaWiki.hs
@@ -342,6 +342,8 @@ inlineToMediaWiki opts (Quoted DoubleQuote lst) = do
   contents <- inlineListToMediaWiki opts lst
   return $ "&ldquo;" ++ contents ++ "&rdquo;"
 
+inlineToMediaWiki opts (Cite _  lst) = inlineListToMediaWiki opts lst
+
 inlineToMediaWiki _ EmDash = return "&mdash;"
 
 inlineToMediaWiki _ EnDash = return "&ndash;"