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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) 2008-2010 Andrea Rossato
License : GNU GPL, version 2 or above
Maintainer : Andrea Rossato <andrea.rossato@unitn.it>
Stability : alpha
Portability : portable
-}
module Text.Pandoc.Biblio ( processBiblio ) where
import Data.List
import Data.Char ( isDigit, isPunctuation )
import qualified Data.Map as M
import Text.CSL hiding ( Cite(..), Citation(..), endWithPunct )
import qualified Text.CSL as CSL ( Cite(..) )
import Text.Pandoc.Definition
import Text.Pandoc.Generic
import Text.Pandoc.Walk
import Text.Pandoc.Shared (stringify)
import Text.Parsec hiding (State)
import Control.Monad
import Control.Monad.State
-- | Process a 'Pandoc' document by adding citations formatted
-- according to a CSL style, using 'citeproc' from citeproc-hs.
processBiblio :: Maybe Style -> [Reference] -> Pandoc -> Pandoc
processBiblio Nothing _ p = p
processBiblio _ [] p = p
processBiblio (Just style) r p =
let p' = evalState (bottomUpM setHash p) 1
grps = query getCitation p'
result = citeproc procOpts style r (setNearNote style $
map (map toCslCite) grps)
cits_map = M.fromList $ zip grps (citations result)
biblioList = map (renderPandoc' style) (bibliography result)
Pandoc m b = bottomUp mvPunct . deNote . topDown (processCite style cits_map) $ p'
(bs, lastb) = case reverse b of
x@(Header _ _ _) : xs -> (reverse xs, [x])
_ -> (b, [])
in Pandoc m $ bs ++ [Div ("",["references"],[]) (lastb ++ biblioList)]
-- | Substitute 'Cite' elements with formatted citations.
processCite :: Style -> M.Map [Citation] [FormattedOutput] -> Inline -> Inline
processCite s cs (Cite t _) =
case M.lookup t cs of
Just (x:xs)
| isTextualCitation t && not (null xs) ->
let xs' = renderPandoc s xs
in if styleClass s == "note"
then Cite t (renderPandoc s [x] ++ [Note [Para xs']])
else Cite t (renderPandoc s [x] ++ [Space | not (startWithPunct xs')] ++ xs')
| otherwise -> if styleClass s == "note"
then Cite t [Note [Para $ renderPandoc s (x:xs)]]
else Cite t (renderPandoc s (x:xs))
_ -> Strong [Str "???"] -- TODO raise error instead?
processCite _ _ x = x
isNote :: Inline -> Bool
isNote (Note _) = True
isNote (Cite _ [Note _]) = True
isNote _ = False
mvPunct :: [Inline] -> [Inline]
mvPunct (Space : Space : xs) = Space : xs
mvPunct (Space : x : ys) | isNote x, startWithPunct ys =
Str (headInline ys) : x : tailFirstInlineStr ys
mvPunct (Space : x : ys) | isNote x = x : ys
mvPunct xs = xs
-- A replacement for citeproc-hs's endWithPunct, which wrongly treats
-- a sentence ending in '.)' as not ending with punctuation, leading
-- to an extra period.
endWithPunct :: [Inline] -> Bool
endWithPunct [] = True
endWithPunct xs@(_:_) = case reverse (stringify [last xs]) of
[] -> True
(')':c:_) | isEndPunct c -> True
(c:_) | isEndPunct c -> True
| otherwise -> False
where isEndPunct c = c `elem` ".,;:!?"
deNote :: Pandoc -> Pandoc
deNote = topDown go
where go (Cite (c:cs) [Note xs]) =
Cite (c:cs) [Note $ bottomUp go' $ sanitize c xs]
go (Note xs) = Note $ bottomUp go' xs
go x = x
go' (Note [Para xs]:ys) =
if startWithPunct ys && endWithPunct xs
then initInline xs ++ ys
else xs ++ ys
go' xs = xs
sanitize :: Citation -> [Block] -> [Block]
sanitize Citation{citationPrefix = pref} [Para xs] =
case (null pref, endWithPunct xs) of
(True, False) -> [Para $ xs ++ [Str "."]]
(True, True) -> [Para xs]
(False, False) -> [Para $ toCapital $ xs ++ [Str "."]]
(False, True) -> [Para $ toCapital xs]
sanitize _ bs = bs
isTextualCitation :: [Citation] -> Bool
isTextualCitation (c:_) = citationMode c == AuthorInText
isTextualCitation _ = False
-- | Retrieve all citations from a 'Pandoc' docuument. To be used with
-- 'query'.
getCitation :: Inline -> [[Citation]]
getCitation i | Cite t _ <- i = [t]
| otherwise = []
setHash :: Citation -> State Int Citation
setHash c = do
ident <- get
put $ ident + 1
return c{ citationHash = ident }
toCslCite :: Citation -> CSL.Cite
toCslCite c
= let (l, s) = locatorWords $ citationSuffix c
(la,lo) = parseLocator l
s' = case (l,s) of
-- treat a bare locator as if it begins with space
-- so @item1 [blah] is like [@item1, blah]
("",(x:_))
| not (isPunct x) -> [Space] ++ s
_ -> s
isPunct (Str (x:_)) = isPunctuation x
isPunct _ = False
citMode = case citationMode c of
AuthorInText -> (True, False)
SuppressAuthor -> (False,True )
NormalCitation -> (False,False)
in emptyCite { CSL.citeId = citationId c
, CSL.citePrefix = PandocText $ citationPrefix c
, CSL.citeSuffix = PandocText s'
, CSL.citeLabel = la
, CSL.citeLocator = lo
, CSL.citeNoteNumber = show $ citationNoteNum c
, CSL.authorInText = fst citMode
, CSL.suppressAuthor = snd citMode
, CSL.citeHash = citationHash c
}
locatorWords :: [Inline] -> (String, [Inline])
locatorWords inp =
case parse pLocatorWords "suffix" $ breakup inp of
Right r -> r
Left _ -> ("",inp)
where breakup [] = []
breakup (Str x : xs) = map Str (splitup x) ++ breakup xs
breakup (x : xs) = x : breakup xs
splitup = groupBy (\x y -> x /= '\160' && y /= '\160')
pLocatorWords :: Parsec [Inline] st (String, [Inline])
pLocatorWords = do
l <- pLocator
s <- getInput -- rest is suffix
if length l > 0 && last l == ','
then return (init l, Str "," : s)
else return (l, s)
pMatch :: (Inline -> Bool) -> Parsec [Inline] st Inline
pMatch condition = try $ do
t <- anyToken
guard $ condition t
return t
pSpace :: Parsec [Inline] st Inline
pSpace = pMatch (\t -> t == Space || t == Str "\160")
pLocator :: Parsec [Inline] st String
pLocator = try $ do
optional $ pMatch (== Str ",")
optional pSpace
f <- (guardFollowingDigit >> return [Str "p"]) -- "page" the default
<|> many1 (notFollowedBy pSpace >> anyToken)
gs <- many1 pWordWithDigits
return $ stringify f ++ (' ' : unwords gs)
guardFollowingDigit :: Parsec [Inline] st ()
guardFollowingDigit = do
t <- lookAhead anyToken
case t of
Str (d:_) | isDigit d -> return ()
_ -> mzero
pWordWithDigits :: Parsec [Inline] st String
pWordWithDigits = try $ do
optional pSpace
r <- many1 (notFollowedBy pSpace >> anyToken)
let s = stringify r
guard $ any isDigit s
return s
|
