aboutsummaryrefslogtreecommitdiff
path: root/src/Text/Pandoc/Writers/MediaWiki.hs
blob: a7c7fc482e4c86e6a7cbc0a21a712312cbe58356 (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
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
{-
Copyright (C) 2008-2010 John MacFarlane <jgm@berkeley.edu>

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.Writers.MediaWiki 
   Copyright   : Copyright (C) 2008-2010 John MacFarlane
   License     : GNU GPL, version 2 or above 

   Maintainer  : John MacFarlane <jgm@berkeley.edu>
   Stability   : alpha
   Portability : portable

Conversion of 'Pandoc' documents to MediaWiki markup.

MediaWiki:  <http://www.mediawiki.org/wiki/MediaWiki>
-}
module Text.Pandoc.Writers.MediaWiki ( writeMediaWiki ) where
import Text.Pandoc.Definition
import Text.Pandoc.Shared 
import Text.Pandoc.Templates (renderTemplate)
import Text.Pandoc.XML ( escapeStringForXML )
import Data.List ( intersect, intercalate )
import Network.URI ( isURI )
import Control.Monad.State

data WriterState = WriterState {
    stNotes     :: Bool            -- True if there are notes
  , stListLevel :: [Char]          -- String at beginning of list items, e.g. "**"
  , stUseTags   :: Bool            -- True if we should use HTML tags because we're in a complex list
  }

-- | Convert Pandoc to MediaWiki.
writeMediaWiki :: WriterOptions -> Pandoc -> String
writeMediaWiki opts document = 
  evalState (pandocToMediaWiki opts document) 
            (WriterState { stNotes = False, stListLevel = [], stUseTags = False }) 

-- | Return MediaWiki representation of document.
pandocToMediaWiki :: WriterOptions -> Pandoc -> State WriterState String
pandocToMediaWiki opts (Pandoc _ blocks) = do
  body <- blockListToMediaWiki opts blocks
  notesExist <- get >>= return . stNotes
  let notes = if notesExist
                 then "\n<references />"
                 else "" 
  let main = body ++ notes
  let context = writerVariables opts ++
                [ ("body", main) ] ++
                [ ("toc", "yes") | writerTableOfContents opts ]
  if writerStandalone opts
     then return $ renderTemplate context $ writerTemplate opts
     else return main

-- | Escape special characters for MediaWiki.
escapeString :: String -> String
escapeString =  escapeStringForXML

-- | Convert Pandoc block element to MediaWiki. 
blockToMediaWiki :: WriterOptions -- ^ Options
                -> Block         -- ^ Block element
                -> State WriterState String 

blockToMediaWiki _ Null = return ""

blockToMediaWiki opts (Plain inlines) = 
  inlineListToMediaWiki opts inlines

blockToMediaWiki opts (Para [Image txt (src,tit)]) = do
  capt <- inlineListToMediaWiki opts txt 
  let opt = if null txt
               then ""
               else "|alt=" ++ if null tit then capt else tit ++
                    "|caption " ++ capt
  return $ "[[Image:" ++ src ++ "|frame|none" ++ opt ++ "]]\n"

blockToMediaWiki opts (Para inlines) = do
  useTags <- get >>= return . stUseTags
  listLevel <- get >>= return . stListLevel
  contents <- inlineListToMediaWiki opts inlines
  return $ if useTags
              then  "<p>" ++ contents ++ "</p>"
              else contents ++ if null listLevel then "\n" else ""

blockToMediaWiki _ (RawBlock "mediawiki" str) = return str
blockToMediaWiki _ (RawBlock "html" str) = return str
blockToMediaWiki _ (RawBlock _ _) = return ""

blockToMediaWiki _ HorizontalRule = return "\n-----\n"

blockToMediaWiki opts (Header level inlines) = do
  contents <- inlineListToMediaWiki opts inlines
  let eqs = replicate level '='
  return $ eqs ++ " " ++ contents ++ " " ++ eqs ++ "\n"

blockToMediaWiki _ (CodeBlock (_,classes,_) str) = do
  let at  = classes `intersect` ["actionscript", "ada", "apache", "applescript", "asm", "asp",
                       "autoit", "bash", "blitzbasic", "bnf", "c", "c_mac", "caddcl", "cadlisp", "cfdg", "cfm",
                       "cpp", "cpp-qt", "csharp", "css", "d", "delphi", "diff", "div", "dos", "eiffel", "fortran",
                       "freebasic", "gml", "groovy", "html4strict", "idl", "ini", "inno", "io", "java", "java5",
                       "javascript", "latex", "lisp", "lua", "matlab", "mirc", "mpasm", "mysql", "nsis", "objc",
                       "ocaml", "ocaml-brief", "oobas", "oracle8", "pascal", "perl", "php", "php-brief", "plsql",
                       "python", "qbasic", "rails", "reg", "robots", "ruby", "sas", "scheme", "sdlbasic",
                       "smalltalk", "smarty", "sql", "tcl", "", "thinbasic", "tsql", "vb", "vbnet", "vhdl", 
                       "visualfoxpro", "winbatch", "xml", "xpp", "z80"]
  let (beg, end) = if null at
                      then ("<pre" ++ if null classes then ">" else " class=\"" ++ unwords classes ++ "\">", "</pre>")
                      else ("<source lang=\"" ++ head at ++ "\">", "</source>")
  return $ beg ++ escapeString str ++ end

blockToMediaWiki opts (BlockQuote blocks) = do
  contents <- blockListToMediaWiki opts blocks
  return $ "<blockquote>" ++ contents ++ "</blockquote>" 

blockToMediaWiki opts (Table capt aligns widths headers rows') = do
  let alignStrings = map alignmentToString aligns
  captionDoc <- if null capt
                   then return ""
                   else do
                      c <- inlineListToMediaWiki opts capt
                      return $ "<caption>" ++ c ++ "</caption>\n"
  let percent w = show (truncate (100*w) :: Integer) ++ "%"
  let coltags = if all (== 0.0) widths
                   then ""
                   else unlines $ map
                         (\w -> "<col width=\"" ++ percent w ++ "\" />") widths
  head' <- if all null headers
              then return ""
              else do
                 hs <- tableRowToMediaWiki opts alignStrings 0 headers
                 return $ "<thead>\n" ++ hs ++ "\n</thead>\n"
  body' <- zipWithM (tableRowToMediaWiki opts alignStrings) [1..] rows'
  return $ "<table>\n" ++ captionDoc ++ coltags ++ head' ++
            "<tbody>\n" ++ unlines body' ++ "</tbody>\n</table>\n"

blockToMediaWiki opts x@(BulletList items) = do
  oldUseTags <- get >>= return . stUseTags
  let useTags = oldUseTags || not (isSimpleList x)
  if useTags
     then do
        modify $ \s -> s { stUseTags = True }
        contents <- mapM (listItemToMediaWiki opts) items
        modify $ \s -> s { stUseTags = oldUseTags }
        return $ "<ul>\n" ++ vcat contents ++ "</ul>\n"
     else do
        modify $ \s -> s { stListLevel = stListLevel s ++ "*" }
        contents <- mapM (listItemToMediaWiki opts) items
        modify $ \s -> s { stListLevel = init (stListLevel s) }
        return $ vcat contents ++ "\n"

blockToMediaWiki opts x@(OrderedList attribs items) = do
  oldUseTags <- get >>= return . stUseTags
  let useTags = oldUseTags || not (isSimpleList x)
  if useTags
     then do
        modify $ \s -> s { stUseTags = True }
        contents <- mapM (listItemToMediaWiki opts) items
        modify $ \s -> s { stUseTags = oldUseTags }
        return $ "<ol" ++ listAttribsToString attribs ++ ">\n" ++ vcat contents ++ "</ol>\n"
     else do
        modify $ \s -> s { stListLevel = stListLevel s ++ "#" }
        contents <- mapM (listItemToMediaWiki opts) items
        modify $ \s -> s { stListLevel = init (stListLevel s) }
        return $ vcat contents ++ "\n"

blockToMediaWiki opts x@(DefinitionList items) = do
  oldUseTags <- get >>= return . stUseTags
  let useTags = oldUseTags || not (isSimpleList x)
  if useTags
     then do
        modify $ \s -> s { stUseTags = True }
        contents <- mapM (definitionListItemToMediaWiki opts) items
        modify $ \s -> s { stUseTags = oldUseTags }
        return $ "<dl>\n" ++ vcat contents ++ "</dl>\n"
     else do
        modify $ \s -> s { stListLevel = stListLevel s ++ ";" }
        contents <- mapM (definitionListItemToMediaWiki opts) items
        modify $ \s -> s { stListLevel = init (stListLevel s) }
        return $ vcat contents ++ "\n"

-- Auxiliary functions for lists:

-- | Convert ordered list attributes to HTML attribute string
listAttribsToString :: ListAttributes -> String
listAttribsToString (startnum, numstyle, _) =
  let numstyle' = camelCaseToHyphenated $ show numstyle
  in  (if startnum /= 1
          then " start=\"" ++ show startnum ++ "\""
          else "") ++
      (if numstyle /= DefaultStyle
          then " style=\"list-style-type: " ++ numstyle' ++ ";\""
          else "")

-- | Convert bullet or ordered list item (list of blocks) to MediaWiki.
listItemToMediaWiki :: WriterOptions -> [Block] -> State WriterState String
listItemToMediaWiki opts items = do
  contents <- blockListToMediaWiki opts items
  useTags <- get >>= return . stUseTags
  if useTags
     then return $ "<li>" ++ contents ++ "</li>"
     else do
       marker <- get >>= return . stListLevel
       return $ marker ++ " " ++ contents

-- | Convert definition list item (label, list of blocks) to MediaWiki.
definitionListItemToMediaWiki :: WriterOptions
                             -> ([Inline],[[Block]]) 
                             -> State WriterState String
definitionListItemToMediaWiki opts (label, items) = do
  labelText <- inlineListToMediaWiki opts label
  contents <- mapM (blockListToMediaWiki opts) items
  useTags <- get >>= return . stUseTags
  if useTags
     then return $ "<dt>" ++ labelText ++ "</dt>\n" ++
           (intercalate "\n" $ map (\d -> "<dd>" ++ d ++ "</dd>") contents)
     else do
       marker <- get >>= return . stListLevel
       return $ marker ++ " " ++ labelText ++ "\n" ++
           (intercalate "\n" $ map (\d -> init marker ++ ": " ++ d) contents)

-- | True if the list can be handled by simple wiki markup, False if HTML tags will be needed.
isSimpleList :: Block -> Bool
isSimpleList x =
  case x of
       BulletList items                 -> all isSimpleListItem items
       OrderedList (num, sty, _) items  -> all isSimpleListItem items &&
                                            num == 1 && sty `elem` [DefaultStyle, Decimal]
       DefinitionList items             -> all isSimpleListItem $ concatMap snd items 
       _                                -> False

-- | True if list item can be handled with the simple wiki syntax.  False if
--   HTML tags will be needed.
isSimpleListItem :: [Block] -> Bool
isSimpleListItem []  = True
isSimpleListItem [x] =
  case x of
       Plain _           -> True
       Para  _           -> True
       BulletList _      -> isSimpleList x
       OrderedList _ _   -> isSimpleList x
       DefinitionList _  -> isSimpleList x
       _                 -> False
isSimpleListItem [x, y] | isPlainOrPara x =
  case y of
       BulletList _      -> isSimpleList y
       OrderedList _ _   -> isSimpleList y
       DefinitionList _  -> isSimpleList y
       _                 -> False
isSimpleListItem _ = False

isPlainOrPara :: Block -> Bool
isPlainOrPara (Plain _) = True
isPlainOrPara (Para  _) = True
isPlainOrPara _         = False

-- | Concatenates strings with line breaks between them.
vcat :: [String] -> String
vcat = intercalate "\n"

-- Auxiliary functions for tables:

tableRowToMediaWiki :: WriterOptions
                    -> [String]
                    -> Int
                    -> [[Block]]
                    -> State WriterState String
tableRowToMediaWiki opts alignStrings rownum cols' = do
  let celltype = if rownum == 0 then "th" else "td"
  let rowclass = case rownum of
                      0                  -> "header"
                      x | x `rem` 2 == 1 -> "odd"
                      _                  -> "even"
  cols'' <- sequence $ zipWith 
            (\alignment item -> tableItemToMediaWiki opts celltype alignment item) 
            alignStrings cols'
  return $ "<tr class=\"" ++ rowclass ++ "\">\n" ++ unlines cols'' ++ "</tr>"

alignmentToString :: Alignment -> [Char]
alignmentToString alignment = case alignment of
                                 AlignLeft    -> "left"
                                 AlignRight   -> "right"
                                 AlignCenter  -> "center"
                                 AlignDefault -> "left"

tableItemToMediaWiki :: WriterOptions
                     -> String
                     -> String
                     -> [Block]
                     -> State WriterState String
tableItemToMediaWiki opts celltype align' item = do
  let mkcell x = "<" ++ celltype ++ " align=\"" ++ align' ++ "\">" ++
                    x ++ "</" ++ celltype ++ ">"
  contents <- blockListToMediaWiki opts item
  return $ mkcell contents

-- | Convert list of Pandoc block elements to MediaWiki.
blockListToMediaWiki :: WriterOptions -- ^ Options
                    -> [Block]       -- ^ List of block elements
                    -> State WriterState String 
blockListToMediaWiki opts blocks =
  mapM (blockToMediaWiki opts) blocks >>= return . vcat

-- | Convert list of Pandoc inline elements to MediaWiki.
inlineListToMediaWiki :: WriterOptions -> [Inline] -> State WriterState String
inlineListToMediaWiki opts lst =
  mapM (inlineToMediaWiki opts) lst >>= return . concat

-- | Convert Pandoc inline element to MediaWiki.
inlineToMediaWiki :: WriterOptions -> Inline -> State WriterState String

inlineToMediaWiki opts (Emph lst) = do 
  contents <- inlineListToMediaWiki opts lst
  return $ "''" ++ contents ++ "''" 

inlineToMediaWiki opts (Strong lst) = do
  contents <- inlineListToMediaWiki opts lst
  return $ "'''" ++ contents ++ "'''"

inlineToMediaWiki opts (Strikeout lst) = do
  contents <- inlineListToMediaWiki opts lst
  return $ "<s>" ++ contents ++ "</s>"

inlineToMediaWiki opts (Superscript lst) = do
  contents <- inlineListToMediaWiki opts lst
  return $ "<sup>" ++ contents ++ "</sup>"

inlineToMediaWiki opts (Subscript lst) = do
  contents <- inlineListToMediaWiki opts lst
  return $ "<sub>" ++ contents ++ "</sub>"

inlineToMediaWiki opts (SmallCaps lst) = inlineListToMediaWiki opts lst

inlineToMediaWiki opts (Quoted SingleQuote lst) = do
  contents <- inlineListToMediaWiki opts lst
  return $ "&lsquo;" ++ contents ++ "&rsquo;"

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;"

inlineToMediaWiki _ Apostrophe = return "&rsquo;"

inlineToMediaWiki _ Ellipses = return "&hellip;"

inlineToMediaWiki _ (Code _ str) =
  return $ "<tt>" ++ (escapeString str) ++ "</tt>"

inlineToMediaWiki _ (Str str) = return $ escapeString str

inlineToMediaWiki _ (Math _ str) = return $ "<math>" ++ str ++ "</math>"
                                 -- note:  str should NOT be escaped

inlineToMediaWiki _ (RawInline "mediawiki" str) = return str 
inlineToMediaWiki _ (RawInline "html" str) = return str 
inlineToMediaWiki _ (RawInline _ _) = return ""

inlineToMediaWiki _ (LineBreak) = return "<br />\n"

inlineToMediaWiki _ Space = return " "

inlineToMediaWiki opts (Link txt (src, _)) = do
  label <- inlineListToMediaWiki opts txt
  case txt of
     [Code _ s] | s == src -> return src
     _  -> if isURI src
              then return $ "[" ++ src ++ " " ++ label ++ "]"
              else return $ "[[" ++ src' ++ "|" ++ label ++ "]]"
                     where src' = case src of
                                     '/':xs -> xs  -- with leading / it's a
                                     _      -> src -- link to a help page
inlineToMediaWiki opts (Image alt (source, tit)) = do
  alt' <- inlineListToMediaWiki opts alt
  let txt = if (null tit)
               then if null alt
                       then ""
                       else "|" ++ alt'
               else "|" ++ tit
  return $ "[[Image:" ++ source ++ txt ++ "]]"

inlineToMediaWiki opts (Note contents) = do 
  contents' <- blockListToMediaWiki opts contents
  modify (\s -> s { stNotes = True })
  return $ "<ref>" ++ contents' ++ "</ref>"
  -- note - may not work for notes with multiple blocks