aboutsummaryrefslogtreecommitdiff
path: root/src/Text/Pandoc/Highlighting.hs
blob: df060915c866b50b349e47d1d986e37e732b9c6c (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
{-
Copyright (C) 2008-2016 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.Highlighting
   Copyright   : Copyright (C) 2008-2016 John MacFarlane
   License     : GNU GPL, version 2 or above

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

Exports functions for syntax highlighting.
-}

module Text.Pandoc.Highlighting ( highlightingStyles
                                , languages
                                , languagesByExtension
                                , highlight
                                , formatLaTeXInline
                                , formatLaTeXBlock
                                , styleToLaTeX
                                , formatHtmlInline
                                , formatHtmlBlock
                                , styleToCss
                                , pygments
                                , espresso
                                , zenburn
                                , tango
                                , kate
                                , monochrome
                                , haddock
                                , Style
                                , fromListingsLanguage
                                , toListingsLanguage
                                ) where
import Text.Pandoc.Definition
import Text.Pandoc.Shared (safeRead)
import Skylighting
import Data.Maybe (fromMaybe)
import Data.Char (toLower)
import qualified Data.Map as M
import Control.Monad
import qualified Data.Text as T

highlightingStyles :: [(String, Style)]
highlightingStyles =
  [("pygments", pygments),
   ("tango", tango),
   ("espresso", espresso),
   ("zenburn", zenburn),
   ("kate", kate),
   ("monochrome", monochrome),
   ("breezedark", breezeDark),
   ("haddock", haddock)]

languages :: [String]
languages = [T.unpack (T.toLower (sName s)) | s <- M.elems defaultSyntaxMap]

languagesByExtension :: String -> [String]
languagesByExtension ext =
  [T.unpack (T.toLower (sName s)) | s <- syntaxesByExtension defaultSyntaxMap ext]

highlight :: (FormatOptions -> [SourceLine] -> a) -- ^ Formatter
          -> Attr   -- ^ Attributes of the CodeBlock
          -> String -- ^ Raw contents of the CodeBlock
          -> Maybe a -- ^ Maybe the formatted result
highlight formatter (_, classes, keyvals) rawCode =
  let firstNum = fromMaybe 1 (safeRead (fromMaybe "1" $ lookup "startFrom" keyvals))
      fmtOpts = defaultFormatOpts{
                  startNumber = firstNum,
                  numberLines = any (`elem`
                        ["number","numberLines", "number-lines"]) classes }
      tokenizeOpts = TokenizerConfig{ syntaxMap = defaultSyntaxMap
                                    , traceOutput = False }
      classes' = map T.pack classes
      rawCode' = T.pack rawCode
  in  case msum (map (\l -> lookupSyntax l defaultSyntaxMap) classes') of
            Nothing
              | numberLines fmtOpts -> Just
                              $ formatter fmtOpts{ codeClasses = [],
                                                   containerClasses = classes' }
                              $ map (\ln -> [(NormalTok, ln)]) $ T.lines rawCode'
              | otherwise  -> Nothing
            Just syntax  ->
              case tokenize tokenizeOpts syntax rawCode' of
                   Right slines -> Just $
                         formatter fmtOpts{ codeClasses =
                                               [T.toLower (sShortname syntax)],
                                            containerClasses = classes' } slines
                   Left _ -> Nothing

-- Functions for correlating latex listings package's language names
-- with skylighting language names:

langToListingsMap :: M.Map String String
langToListingsMap = M.fromList langsList

listingsToLangMap :: M.Map String String
listingsToLangMap = M.fromList $ map switch langsList
  where switch (a,b) = (b,a)

langsList :: [(String, String)]
langsList =
  [("abap","ABAP"),
  ("acm","ACM"),
  ("acmscript","ACMscript"),
  ("acsl","ACSL"),
  ("ada","Ada"),
  ("algol","Algol"),
  ("ant","Ant"),
  ("assembler","Assembler"),
  ("gnuassembler","Assembler"),
  ("awk","Awk"),
  ("bash","bash"),
  ("monobasic","Basic"),
  ("purebasic","Basic"),
  ("c","C"),
  ("cpp","C++"),
  ("c++","C++"),
  ("ocaml","Caml"),
  ("cil","CIL"),
  ("clean","Clean"),
  ("cobol","Cobol"),
  ("comal80","Comal80"),
  ("command.com","command.com"),
  ("comsol","Comsol"),
  ("csh","csh"),
  ("delphi","Delphi"),
  ("elan","Elan"),
  ("erlang","erlang"),
  ("euphoria","Euphoria"),
  ("fortran","Fortran"),
  ("gap","GAP"),
  ("gcl","GCL"),
  ("gnuplot","Gnuplot"),
  ("hansl","hansl"),
  ("haskell","Haskell"),
  ("html","HTML"),
  ("idl","IDL"),
  ("inform","inform"),
  ("java","Java"),
  ("jvmis","JVMIS"),
  ("ksh","ksh"),
  ("lingo","Lingo"),
  ("lisp","Lisp"),
  ("commonlisp","Lisp"),
  ("llvm","LLVM"),
  ("logo","Logo"),
  ("lua","Lua"),
  ("make","make"),
  ("makefile","make"),
  ("mathematica","Mathematica"),
  ("matlab","Matlab"),
  ("mercury","Mercury"),
  ("metapost","MetaPost"),
  ("miranda","Miranda"),
  ("mizar","Mizar"),
  ("ml","ML"),
  ("modula2","Modula-2"),
  ("mupad","MuPAD"),
  ("nastran","NASTRAN"),
  ("oberon2","Oberon-2"),
  ("ocl","OCL"),
  ("octave","Octave"),
  ("oz","Oz"),
  ("pascal","Pascal"),
  ("perl","Perl"),
  ("php","PHP"),
  ("pli","PL/I"),
  ("plasm","Plasm"),
  ("postscript","PostScript"),
  ("pov","POV"),
  ("prolog","Prolog"),
  ("promela","Promela"),
  ("pstricks","PSTricks"),
  ("python","Python"),
  ("r","R"),
  ("reduce","Reduce"),
  ("rexx","Rexx"),
  ("rsl","RSL"),
  ("ruby","Ruby"),
  ("s","S"),
  ("sas","SAS"),
  ("scala","Scala"),
  ("scilab","Scilab"),
  ("sh","sh"),
  ("shelxl","SHELXL"),
  ("simula","Simula"),
  ("sparql","SPARQL"),
  ("sql","SQL"),
  ("tcl","tcl"),
  ("tex","TeX"),
  ("latex","TeX"),
  ("vbscript","VBScript"),
  ("verilog","Verilog"),
  ("vhdl","VHDL"),
  ("vrml","VRML"),
  ("xml","XML"),
  ("xslt","XSLT")]

-- | Determine listings language name from skylighting language name.
toListingsLanguage :: String -> Maybe String
toListingsLanguage lang = M.lookup (map toLower lang) langToListingsMap

-- | Determine skylighting language name from listings language name.
fromListingsLanguage :: String -> Maybe String
fromListingsLanguage lang = M.lookup lang listingsToLangMap