aboutsummaryrefslogtreecommitdiff
path: root/src/Text/Pandoc/Biblio.hs
blob: d65c9de1c49c38e955932ce710da8387cbe88598 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
{-# 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.Unique
import Data.Char ( isDigit, isPunctuation )
import qualified Data.Map as M
import Text.CSL hiding ( Cite(..), Citation(..) )
import qualified Text.CSL as CSL ( Cite(..) )
import Text.Pandoc.Definition
import Text.Pandoc.Generic
import Text.Pandoc.Shared (stringify)
import Text.ParserCombinators.Parsec
import Control.Monad

-- | Process a 'Pandoc' document by adding citations formatted
-- according to a CSL style, using 'citeproc' from citeproc-hs.
processBiblio :: FilePath -> [Reference] -> Pandoc -> IO Pandoc
processBiblio cslfile r p
    = if null r then return p
      else do
        csl <- readCSLFile cslfile
        p'   <- bottomUpM setHash p
        let (nts,grps) = if styleClass csl == "note"
                         then let cits   = queryWith getCite p'
                                  ncits  = map (queryWith getCite) $ queryWith getNote p'
                                  needNt = cits \\ concat ncits
                              in (,) needNt $ getNoteCitations needNt p'
                         else (,) [] $ queryWith getCitation p'
            result     = citeproc procOpts csl r (setNearNote csl $
                            map (map toCslCite) grps)
            cits_map   = M.fromList $ zip grps (citations result)
            biblioList = map (renderPandoc' csl) (bibliography result)
            Pandoc m b = bottomUp (procInlines $ processCite csl cits_map) p'
        return . generateNotes nts . Pandoc m $ b ++ biblioList

-- | Substitute 'Cite' elements with formatted citations.
processCite :: Style -> M.Map [Citation] [FormattedOutput] -> [Inline] -> [Inline]
processCite _ _ [] = []
processCite s cs (i:is)
    | Cite t _ <- i = process t ++ processCite s cs is
    | otherwise     = i          : processCite s cs is
    where
      addNt t x = if null x then [] else [Cite t $ renderPandoc s x]
      process t = case M.lookup t cs of
                    Just  x -> if isTextualCitation t && x /= []
                               then renderPandoc s [head x] ++
                                    if tail x /= []
                                    then Space : addNt t (tail x)
                                    else []
                               else [Cite t $ renderPandoc s x]
                    Nothing -> [Str ("Error processing " ++ show t)]

isTextualCitation :: [Citation] -> Bool
isTextualCitation (c:_) = citationMode c == AuthorInText
isTextualCitation _     = False

-- | Retrieve all citations from a 'Pandoc' docuument. To be used with
-- 'queryWith'.
getCitation :: Inline -> [[Citation]]
getCitation i | Cite t _ <- i = [t]
              | otherwise     = []

getNote :: Inline -> [Inline]
getNote i | Note _ <- i = [i]
          | otherwise   = []

getCite :: Inline -> [Inline]
getCite i | Cite _ _ <- i = [i]
          | otherwise     = []

getNoteCitations :: [Inline] -> Pandoc -> [[Citation]]
getNoteCitations needNote
    = let mvCite i = if i `elem` needNote then Note [Para [i]] else i
          setNote  = bottomUp mvCite
          getCits  = concat . flip (zipWith $ setCiteNoteNum) [1..] .
                     map (queryWith getCite) . queryWith getNote . setNote
      in  queryWith getCitation . getCits

setHash :: Citation -> IO Citation
setHash (Citation i p s cm nn _)
    = hashUnique `fmap` newUnique >>= return . Citation i p s cm nn

generateNotes :: [Inline] -> Pandoc -> Pandoc
generateNotes needNote = bottomUp (mvCiteInNote needNote)

procInlines :: ([Inline] -> [Inline]) -> Block -> Block
procInlines f b
    | Plain    inls <- b = Plain    $ f inls
    | Para     inls <- b = Para     $ f inls
    | Header i inls <- b = Header i $ f inls
    | otherwise          = b

mvCiteInNote :: [Inline] -> Block -> Block
mvCiteInNote is = procInlines mvCite
    where
      mvCite :: [Inline] -> [Inline]
      mvCite inls
          | x:i:xs <- inls, startWithPunct xs
          , x == Space,   i `elem_` is = switch i xs ++ mvCite (tailFirstInlineStr xs)
          | x:i:xs <- inls
          , x == Space,   i `elem_` is = mvInNote i :   mvCite xs
          | i:xs <- inls, i `elem_` is
          , startWithPunct xs          = switch i xs ++ mvCite (tailFirstInlineStr xs)
          | i:xs <- inls, Note _ <- i  = checkNt  i :   mvCite xs
          | i:xs <- inls               = i          :   mvCite xs
          | otherwise                  = []
      elem_  x xs = case x of Cite cs _ -> (Cite cs []) `elem` xs; _ -> False
      switch i xs = Str (headInline xs) : mvInNote i : []
      mvInNote i
          | Cite t o <- i = Note [Para [Cite t $ sanitize o]]
          | otherwise     = Note [Para [i                  ]]
      sanitize i
          | endWithPunct   i = toCapital i
          | otherwise        = toCapital (i ++ [Str "."])

      checkPt i
          | Cite c o : xs <- i
          , endWithPunct o, startWithPunct xs
          , endWithPunct o = Cite c (initInline o) : checkPt xs
          | x:xs <- i      = x : checkPt xs
          | otherwise      = []
      checkNt  = bottomUp $ procInlines checkPt

setCiteNoteNum :: [Inline] -> Int -> [Inline]
setCiteNoteNum ((Cite cs o):xs) n = Cite (setCitationNoteNum n cs) o : setCiteNoteNum xs n
setCiteNoteNum               _  _ = []

setCitationNoteNum :: Int -> [Citation] -> [Citation]
setCitationNoteNum i = map $ \c -> c { citationNoteNum = i}

toCslCite :: Citation -> CSL.Cite
toCslCite c
    = let (l, s)  = locatorWords $ citationSuffix c
          (la,lo) = parseLocator l
          citMode = case citationMode c of
                      AuthorInText   -> (True, False)
                      SuppressAuthor -> (False,True )
                      NormalCitation -> (False,False)
          s'      = case s of
                         []                                -> []
                         (Str (y:_) : _) | isPunctuation y -> s
                         _                                 -> Str "," : Space : s
      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" inp of
       Right r   -> r
       Left _    -> ("",inp)

pLocatorWords :: GenParser 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) -> GenParser Inline st Inline
pMatch condition = try $ do
  t <- anyToken
  guard $ condition t
  return t

pSpace :: GenParser Inline st Inline
pSpace = pMatch (== Space)

pLocator :: GenParser Inline st String
pLocator = try $ do
  optional $ pMatch (== Str ",")
  optional pSpace
  f  <- many1 (notFollowedBy pSpace >> anyToken)
  gs <- many1 pWordWithDigits
  return $ stringify f ++ (' ' : unwords gs)

pWordWithDigits :: GenParser Inline st String
pWordWithDigits = try $ do
  pSpace
  r <- many1 (notFollowedBy pSpace >> anyToken)
  let s = stringify r
  guard $ any isDigit s
  return s