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|
--------------------------------------------------------------------------------
-- | Wraps pandocs bibiliography handling
--
-- In order to add a bibliography, you will need a bibliography file (e.g.
-- @.bib@) and a CSL file (@.csl@). Both need to be compiled with their
-- respective compilers ('biblioCompiler' and 'cslCompiler'). Then, you can
-- refer to these files when you use 'readPandocBiblio'. This function also
-- takes the reader options for completeness -- you can use
-- 'defaultHakyllReaderOptions' if you're unsure.
-- 'pandocBiblioCompiler' is a convenience wrapper which works like 'pandocCompiler',
-- but also takes paths to compiled bibliography and csl files.
{-# LANGUAGE Arrows #-}
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
module Hakyll.Web.Pandoc.Biblio
( CSL
, cslCompiler
, Biblio (..)
, biblioCompiler
, readPandocBiblio
, pandocBiblioCompiler
) where
--------------------------------------------------------------------------------
import Control.Applicative ((<$>))
import Control.Monad (replicateM, liftM)
import Data.Binary (Binary (..))
import Data.Default (def)
import Data.Typeable (Typeable)
import qualified Text.CSL as CSL
import Text.CSL.Pandoc (processCites)
import Text.Pandoc (Pandoc, ReaderOptions (..))
--------------------------------------------------------------------------------
import Hakyll.Core.Compiler
import Hakyll.Core.Identifier
import Hakyll.Core.Item
import Hakyll.Core.Writable
import Hakyll.Web.Pandoc
import Hakyll.Web.Pandoc.Binary ()
--------------------------------------------------------------------------------
data CSL = CSL
deriving (Show, Typeable)
--------------------------------------------------------------------------------
instance Binary CSL where
put CSL = return ()
get = return CSL
--------------------------------------------------------------------------------
instance Writable CSL where
-- Shouldn't be written.
write _ _ = return ()
--------------------------------------------------------------------------------
cslCompiler :: Compiler (Item CSL)
cslCompiler = makeItem CSL
--------------------------------------------------------------------------------
newtype Biblio = Biblio [CSL.Reference]
deriving (Show, Typeable)
--------------------------------------------------------------------------------
instance Binary Biblio where
-- Ugly.
get = do
len <- get
Biblio <$> replicateM len get
put (Biblio rs) = put (length rs) >> mapM_ put rs
--------------------------------------------------------------------------------
instance Writable Biblio where
-- Shouldn't be written.
write _ _ = return ()
--------------------------------------------------------------------------------
biblioCompiler :: Compiler (Item Biblio)
biblioCompiler = do
filePath <- toFilePath <$> getUnderlying
makeItem =<< unsafeCompiler (Biblio <$> CSL.readBiblioFile filePath)
--------------------------------------------------------------------------------
readPandocBiblio :: ReaderOptions
-> Item CSL
-> Item Biblio
-> (Item String)
-> Compiler (Item Pandoc)
readPandocBiblio ropt csl biblio item = do
-- Parse CSL file, if given
style <- unsafeCompiler $ CSL.readCSLFile Nothing . toFilePath . itemIdentifier $ csl
-- We need to know the citation keys, add then *before* actually parsing the
-- actual page. If we don't do this, pandoc won't even consider them
-- citations!
let Biblio refs = itemBody biblio
pandoc <- itemBody <$> readPandocWith ropt item
let pandoc' = processCites style refs pandoc
return $ fmap (const pandoc') item
--------------------------------------------------------------------------------
pandocBiblioCompiler :: String -> String -> Compiler (Item String)
pandocBiblioCompiler cslFileName bibFileName = do
csl <- load $ fromFilePath cslFileName
bib <- load $ fromFilePath bibFileName
liftM writePandoc
(getResourceBody >>= readPandocBiblio def csl bib)
|
