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{-# LANGUAGE PatternGuards #-}
{-
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
-}
module Text.Pandoc.Biblio ( processBiblio ) where
import Control.Monad ( when )
import Data.List
import Text.CSL
import Text.Pandoc.Definition
-- | Process a 'Pandoc' document by adding citations formatted
-- according to a CSL style, using 'citeproc' from citeproc-hs.
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 = queryWith getCite p
result = citeproc csl r groups
cits_map = zip groups (citations result)
biblioList = map (read . renderPandoc' csl) (bibliography result)
Pandoc m b = processWith (processCite csl cits_map) p
return $ Pandoc m $ b ++ biblioList
-- | Substitute 'Cite' elements with formatted citations.
processCite :: Style -> [([Target],[FormattedOutput])] -> Inline -> Inline
processCite s 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 s $ snd (cs !! i)
Nothing -> [Str ("Error processing " ++ show t)]
-- | Retrieve all citations from a 'Pandoc' docuument. To be used with
-- 'queryWith'.
getCite :: Inline -> [[(String,String)]]
getCite i | Cite t _ <- i = [t]
| otherwise = []
|
