aboutsummaryrefslogtreecommitdiff
path: root/src/Text/Pandoc/Options.hs
blob: 367a19da5795750f429fcb41b74ac9a293a1718f (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
{-# LANGUAGE CPP                #-}
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric      #-}
{-# LANGUAGE NoImplicitPrelude  #-}
{-# LANGUAGE TemplateHaskell    #-}
{-# LANGUAGE OverloadedStrings  #-}
{- |
   Module      : Text.Pandoc.Options
   Copyright   : Copyright (C) 2012-2019 John MacFarlane
   License     : GNU GPL, version 2 or above

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

Data structures and functions for representing parser and writer
options.
-}
module Text.Pandoc.Options ( module Text.Pandoc.Extensions
                           , ReaderOptions(..)
                           , HTMLMathMethod (..)
                           , CiteMethod (..)
                           , ObfuscationMethod (..)
                           , HTMLSlideVariant (..)
                           , EPUBVersion (..)
                           , WrapOption (..)
                           , TopLevelDivision (..)
                           , WriterOptions (..)
                           , TrackChanges (..)
                           , ReferenceLocation (..)
                           , def
                           , isEnabled
                           , defaultMathJaxURL
                           , defaultKaTeXURL
                           ) where
import Prelude
import Control.Applicative ((<|>))
import Data.Char (toLower)
import Data.Data (Data)
import Data.Default
import Data.Text (Text, unpack)
import Text.DocTemplates (Context(..))
import qualified Data.Set as Set
import Data.Typeable (Typeable)
import GHC.Generics (Generic)
import Skylighting (SyntaxMap, defaultSyntaxMap)
import Text.Pandoc.Extensions
import Text.Pandoc.Highlighting (Style, pygments)
import Text.Pandoc.Shared (camelCaseToHyphenated)
import Text.DocTemplates (Template)
import Data.Aeson.TH (deriveJSON, defaultOptions, Options(..),
                      SumEncoding(..))
import Data.YAML

class HasSyntaxExtensions a where
  getExtensions :: a -> Extensions

data ReaderOptions = ReaderOptions{
         readerExtensions            :: Extensions  -- ^ Syntax extensions
       , readerStandalone            :: Bool -- ^ Standalone document with header
       , readerColumns               :: Int  -- ^ Number of columns in terminal
       , readerTabStop               :: Int  -- ^ Tab stop
       , readerIndentedCodeClasses   :: [String] -- ^ Default classes for
                                       -- indented code blocks
       , readerAbbreviations         :: Set.Set String -- ^ Strings to treat as abbreviations
       , readerDefaultImageExtension :: String -- ^ Default extension for images
       , readerTrackChanges          :: TrackChanges -- ^ Track changes setting for docx
       , readerStripComments         :: Bool -- ^ Strip HTML comments instead of parsing as raw HTML
} deriving (Show, Read, Data, Typeable, Generic)

instance HasSyntaxExtensions ReaderOptions where
  getExtensions opts = readerExtensions opts

instance Default ReaderOptions
  where def = ReaderOptions{
                 readerExtensions            = emptyExtensions
               , readerStandalone            = False
               , readerColumns               = 80
               , readerTabStop               = 4
               , readerIndentedCodeClasses   = []
               , readerAbbreviations         = defaultAbbrevs
               , readerDefaultImageExtension = ""
               , readerTrackChanges          = AcceptChanges
               , readerStripComments         = False
               }

defaultAbbrevs :: Set.Set String
defaultAbbrevs = Set.fromList
                 [ "Mr.", "Mrs.", "Ms.", "Capt.", "Dr.", "Prof.",
                   "Gen.", "Gov.", "e.g.", "i.e.", "Sgt.", "St.",
                   "vol.", "vs.", "Sen.", "Rep.", "Pres.", "Hon.",
                   "Rev.", "Ph.D.", "M.D.", "M.A.", "p.", "pp.",
                   "ch.", "sec.", "cf.", "cp."]

--
-- Writer options
--

data EPUBVersion = EPUB2 | EPUB3 deriving (Eq, Show, Read, Data, Typeable, Generic)

data HTMLMathMethod = PlainMath
                    | WebTeX String               -- url of TeX->image script.
                    | GladTeX
                    | MathML
                    | MathJax String              -- url of MathJax.js
                    | KaTeX String                -- url of KaTeX files
                    deriving (Show, Read, Eq, Data, Typeable, Generic)

instance FromYAML HTMLMathMethod where
   parseYAML node =
     (withMap "HTMLMathMethod" $ \m -> do
        method <- m .: "method"
        mburl <- m .:? "url"
        case unpack method of
          "plain" -> return PlainMath
          "webtex" -> return $ WebTeX $ maybe "" unpack mburl
          "gladtex" -> return GladTeX
          "mathml" -> return MathML
          "mathjax" -> return $ MathJax $
                         maybe defaultMathJaxURL unpack mburl
          "katex" -> return $ KaTeX $
                         maybe defaultKaTeXURL unpack mburl
          _ -> fail $ "Unknown HTML math method " ++ show method) node
       <|> (withStr "HTMLMathMethod" $ \method ->
             case unpack method of
               "plain" -> return PlainMath
               "webtex" -> return $ WebTeX ""
               "gladtex" -> return GladTeX
               "mathml" -> return MathML
               "mathjax" -> return $ MathJax defaultMathJaxURL
               "katex" -> return $ KaTeX defaultKaTeXURL
               _  -> fail $ "Unknown HTML math method " ++ show method) node

data CiteMethod = Citeproc                        -- use citeproc to render them
                  | Natbib                        -- output natbib cite commands
                  | Biblatex                      -- output biblatex cite commands
                deriving (Show, Read, Eq, Data, Typeable, Generic)

instance FromYAML CiteMethod where
  parseYAML = withStr "Citeproc" $ \t ->
    case t of
      "citeproc" -> return Citeproc
      "natbib"   -> return Natbib
      "biblatex" -> return Biblatex
      _          -> fail $ "Unknown citation method " ++ show t

-- | Methods for obfuscating email addresses in HTML.
data ObfuscationMethod = NoObfuscation
                       | ReferenceObfuscation
                       | JavascriptObfuscation
                       deriving (Show, Read, Eq, Data, Typeable, Generic)

instance FromYAML ObfuscationMethod where
  parseYAML = withStr "Citeproc" $ \t ->
    case t of
      "none"       -> return NoObfuscation
      "references" -> return ReferenceObfuscation
      "javascript" -> return JavascriptObfuscation
      _            -> fail $ "Unknown obfuscation method " ++ show t

-- | Varieties of HTML slide shows.
data HTMLSlideVariant = S5Slides
                      | SlidySlides
                      | SlideousSlides
                      | DZSlides
                      | RevealJsSlides
                      | NoSlides
                      deriving (Show, Read, Eq, Data, Typeable, Generic)

-- | Options for accepting or rejecting MS Word track-changes.
data TrackChanges = AcceptChanges
                  | RejectChanges
                  | AllChanges
                  deriving (Show, Read, Eq, Data, Typeable, Generic)

instance FromYAML TrackChanges where
  parseYAML = withStr "TrackChanges" $ \t ->
    case t of
      "accept"     -> return AcceptChanges
      "reject"     -> return RejectChanges
      "all"        -> return AllChanges
      _            -> fail $ "Unknown track changes method " ++ show t

-- | Options for wrapping text in the output.
data WrapOption = WrapAuto        -- ^ Automatically wrap to width
                | WrapNone        -- ^ No non-semantic newlines
                | WrapPreserve    -- ^ Preserve wrapping of input source
                deriving (Show, Read, Eq, Data, Typeable, Generic)

instance FromYAML WrapOption where
  parseYAML = withStr "WrapOption" $ \t ->
    case t of
      "auto"     -> return WrapAuto
      "none"     -> return WrapNone
      "preserve" -> return WrapPreserve
      _          -> fail $ "Unknown wrap method " ++ show t


-- | Options defining the type of top-level headers.
data TopLevelDivision = TopLevelPart      -- ^ Top-level headers become parts
                      | TopLevelChapter   -- ^ Top-level headers become chapters
                      | TopLevelSection   -- ^ Top-level headers become sections
                      | TopLevelDefault   -- ^ Top-level type is determined via
                                          --   heuristics
                      deriving (Show, Read, Eq, Data, Typeable, Generic)

instance FromYAML TopLevelDivision where
  parseYAML = withStr "TopLevelDivision" $ \t ->
    case t of
      "part"     -> return TopLevelPart
      "chapter"  -> return TopLevelChapter
      "section"  -> return TopLevelSection
      "default"  -> return TopLevelDefault
      _          -> fail $ "Unknown top level division " ++ show t


-- | Locations for footnotes and references in markdown output
data ReferenceLocation = EndOfBlock    -- ^ End of block
                       | EndOfSection  -- ^ prior to next section header (or end of document)
                       | EndOfDocument -- ^ at end of document
                       deriving (Show, Read, Eq, Data, Typeable, Generic)

instance FromYAML ReferenceLocation where
  parseYAML = withStr "ReferenceLocation" $ \t ->
    case t of
      "block"    -> return EndOfBlock
      "section"  -> return EndOfSection
      "document" -> return EndOfDocument
      _          -> fail $ "Unknown reference location " ++ show t


-- | Options for writers
data WriterOptions = WriterOptions
  { writerTemplate          :: Maybe Template -- ^ Template to use
  , writerVariables         :: Context Text -- ^ Variables to set in template
  , writerTabStop           :: Int    -- ^ Tabstop for conversion btw spaces and tabs
  , writerTableOfContents   :: Bool   -- ^ Include table of contents
  , writerIncremental       :: Bool   -- ^ True if lists should be incremental
  , writerHTMLMathMethod    :: HTMLMathMethod  -- ^ How to print math in HTML
  , writerNumberSections    :: Bool   -- ^ Number sections in LaTeX
  , writerNumberOffset      :: [Int]  -- ^ Starting number for section, subsection, ...
  , writerSectionDivs       :: Bool   -- ^ Put sections in div tags in HTML
  , writerExtensions        :: Extensions -- ^ Markdown extensions that can be used
  , writerReferenceLinks    :: Bool   -- ^ Use reference links in writing markdown, rst
  , writerDpi               :: Int    -- ^ Dpi for pixel to\/from inch\/cm conversions
  , writerWrapText          :: WrapOption  -- ^ Option for wrapping text
  , writerColumns           :: Int    -- ^ Characters in a line (for text wrapping)
  , writerEmailObfuscation  :: ObfuscationMethod -- ^ How to obfuscate emails
  , writerIdentifierPrefix  :: String -- ^ Prefix for section & note ids in HTML
                                     -- and for footnote marks in markdown
  , writerCiteMethod        :: CiteMethod -- ^ How to print cites
  , writerHtmlQTags         :: Bool       -- ^ Use @<q>@ tags for quotes in HTML
  , writerSlideLevel        :: Maybe Int  -- ^ Force header level of slides
  , writerTopLevelDivision  :: TopLevelDivision -- ^ Type of top-level divisions
  , writerListings          :: Bool       -- ^ Use listings package for code
  , writerHighlightStyle    :: Maybe Style  -- ^ Style to use for highlighting
                                           -- (Nothing = no highlighting)
  , writerSetextHeaders     :: Bool       -- ^ Use setext headers for levels 1-2 in markdown
  , writerEpubSubdirectory  :: String       -- ^ Subdir for epub in OCF
  , writerEpubMetadata      :: Maybe String -- ^ Metadata to include in EPUB
  , writerEpubFonts         :: [FilePath] -- ^ Paths to fonts to embed
  , writerEpubChapterLevel  :: Int            -- ^ Header level for chapters (separate files)
  , writerTOCDepth          :: Int            -- ^ Number of levels to include in TOC
  , writerReferenceDoc      :: Maybe FilePath -- ^ Path to reference document if specified
  , writerReferenceLocation :: ReferenceLocation    -- ^ Location of footnotes and references for writing markdown
  , writerSyntaxMap         :: SyntaxMap
  , writerPreferAscii       :: Bool           -- ^ Prefer ASCII representations of characters when possible
  } deriving (Show, Data, Typeable, Generic)

instance Default WriterOptions where
  def = WriterOptions { writerTemplate         = Nothing
                      , writerVariables        = mempty
                      , writerTabStop          = 4
                      , writerTableOfContents  = False
                      , writerIncremental      = False
                      , writerHTMLMathMethod   = PlainMath
                      , writerNumberSections   = False
                      , writerNumberOffset     = [0,0,0,0,0,0]
                      , writerSectionDivs      = False
                      , writerExtensions       = emptyExtensions
                      , writerReferenceLinks   = False
                      , writerDpi              = 96
                      , writerWrapText         = WrapAuto
                      , writerColumns          = 72
                      , writerEmailObfuscation = NoObfuscation
                      , writerIdentifierPrefix = ""
                      , writerCiteMethod       = Citeproc
                      , writerHtmlQTags        = False
                      , writerSlideLevel       = Nothing
                      , writerTopLevelDivision = TopLevelDefault
                      , writerListings         = False
                      , writerHighlightStyle   = Just pygments
                      , writerSetextHeaders    = True
                      , writerEpubSubdirectory = "EPUB"
                      , writerEpubMetadata     = Nothing
                      , writerEpubFonts        = []
                      , writerEpubChapterLevel = 1
                      , writerTOCDepth         = 3
                      , writerReferenceDoc     = Nothing
                      , writerReferenceLocation = EndOfDocument
                      , writerSyntaxMap        = defaultSyntaxMap
                      , writerPreferAscii      = False
                      }

instance HasSyntaxExtensions WriterOptions where
  getExtensions opts = writerExtensions opts

-- | Returns True if the given extension is enabled.
isEnabled :: HasSyntaxExtensions a => Extension -> a -> Bool
isEnabled ext opts = ext `extensionEnabled` getExtensions opts

defaultMathJaxURL :: String
defaultMathJaxURL = "https://cdn.jsdelivr.net/npm/mathjax@3/es5/"

defaultKaTeXURL :: String
defaultKaTeXURL = "https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.11.1/"

$(deriveJSON defaultOptions ''ReaderOptions)

$(deriveJSON defaultOptions{
   constructorTagModifier = map toLower,
   sumEncoding = TaggedObject{
                    tagFieldName = "method",
                    contentsFieldName = "url" }
                           } ''HTMLMathMethod)

$(deriveJSON defaultOptions{ constructorTagModifier =
                               camelCaseToHyphenated
                           } ''CiteMethod)

$(deriveJSON defaultOptions{ constructorTagModifier =
                            \t -> case t of
                                    "NoObfuscation"         -> "none"
                                    "ReferenceObfuscation"  -> "references"
                                    "JavascriptObfuscation" -> "javascript"
                                    _                       -> "none"
                           } ''ObfuscationMethod)

$(deriveJSON defaultOptions ''HTMLSlideVariant)

$(deriveJSON defaultOptions{ constructorTagModifier =
                               camelCaseToHyphenated
                           } ''TrackChanges)

$(deriveJSON defaultOptions{ constructorTagModifier =
                               camelCaseToHyphenated
                           } ''WrapOption)

$(deriveJSON defaultOptions{ constructorTagModifier =
                               camelCaseToHyphenated . drop 8
                           } ''TopLevelDivision)

$(deriveJSON defaultOptions{ constructorTagModifier =
                               camelCaseToHyphenated
                           } ''ReferenceLocation)