{-# LANGUAGE OverloadedStrings #-}
{- |
   Module      : Text.Pandoc.Highlighting
   Copyright   : Copyright (C) 2008-2021 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
                                , breezeDark
                                , haddock
                                , Style
                                , fromListingsLanguage
                                , toListingsLanguage
                                ) where
import Control.Monad
import qualified Data.Map as M
import Data.Maybe (fromMaybe)
import qualified Data.Text as T
import Skylighting
import Text.Pandoc.Definition
import Text.Pandoc.Shared (safeRead)

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

languages :: [T.Text]
languages :: [Text]
languages = [Text -> Text
T.toLower (Syntax -> Text
sName Syntax
s) | Syntax
s <- Map Text Syntax -> [Syntax]
forall k a. Map k a -> [a]
M.elems Map Text Syntax
defaultSyntaxMap]

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

highlight :: SyntaxMap
          -> (FormatOptions -> [SourceLine] -> a) -- ^ Formatter
          -> Attr   -- ^ Attributes of the CodeBlock
          -> T.Text -- ^ Raw contents of the CodeBlock
          -> Either T.Text a
highlight :: Map Text Syntax
-> (FormatOptions -> [SourceLine] -> a)
-> Attr
-> Text
-> Either Text a
highlight Map Text Syntax
syntaxmap FormatOptions -> [SourceLine] -> a
formatter (Text
ident, [Text]
classes, [(Text, Text)]
keyvals) Text
rawCode =
  let firstNum :: Int
firstNum = Int -> Maybe Int -> Int
forall a. a -> Maybe a -> a
fromMaybe Int
1 (Text -> Maybe Int
forall (m :: * -> *) a. (MonadPlus m, Read a) => Text -> m a
safeRead (Text -> Maybe Text -> Text
forall a. a -> Maybe a -> a
fromMaybe Text
"1" (Maybe Text -> Text) -> Maybe Text -> Text
forall a b. (a -> b) -> a -> b
$ Text -> [(Text, Text)] -> Maybe Text
forall a b. Eq a => a -> [(a, b)] -> Maybe b
lookup Text
"startFrom" [(Text, Text)]
keyvals))
      fmtOpts :: FormatOptions
fmtOpts = FormatOptions
defaultFormatOpts{
                  startNumber :: Int
startNumber = Int
firstNum,
                  lineAnchors :: Bool
lineAnchors = (Text -> Bool) -> [Text] -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
any (Text -> [Text] -> Bool
forall (t :: * -> *) a. (Foldable t, Eq a) => a -> t a -> Bool
`elem`
                        [Text
"line-anchors", Text
"lineAnchors"]) [Text]
classes,
                  numberLines :: Bool
numberLines = (Text -> Bool) -> [Text] -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
any (Text -> [Text] -> Bool
forall (t :: * -> *) a. (Foldable t, Eq a) => a -> t a -> Bool
`elem`
                        [Text
"number",Text
"numberLines", Text
"number-lines"]) [Text]
classes,
                  lineIdPrefix :: Text
lineIdPrefix = if Text -> Bool
T.null Text
ident
                                    then Text
forall a. Monoid a => a
mempty
                                    else Text
ident Text -> Text -> Text
forall a. Semigroup a => a -> a -> a
<> Text
"-" }
      tokenizeOpts :: TokenizerConfig
tokenizeOpts = TokenizerConfig :: Map Text Syntax -> Bool -> TokenizerConfig
TokenizerConfig{ syntaxMap :: Map Text Syntax
syntaxMap = Map Text Syntax
syntaxmap
                                    , traceOutput :: Bool
traceOutput = Bool
False }
  in  case [Maybe Syntax] -> Maybe Syntax
forall (t :: * -> *) (m :: * -> *) a.
(Foldable t, MonadPlus m) =>
t (m a) -> m a
msum ((Text -> Maybe Syntax) -> [Text] -> [Maybe Syntax]
forall a b. (a -> b) -> [a] -> [b]
map (Text -> Map Text Syntax -> Maybe Syntax
`lookupSyntax` Map Text Syntax
syntaxmap) [Text]
classes) of
            Maybe Syntax
Nothing
              | FormatOptions -> Bool
numberLines FormatOptions
fmtOpts -> a -> Either Text a
forall a b. b -> Either a b
Right
                              (a -> Either Text a) -> a -> Either Text a
forall a b. (a -> b) -> a -> b
$ FormatOptions -> [SourceLine] -> a
formatter FormatOptions
fmtOpts{ codeClasses :: [Text]
codeClasses = [],
                                                   containerClasses :: [Text]
containerClasses = [Text]
classes }
                              ([SourceLine] -> a) -> [SourceLine] -> a
forall a b. (a -> b) -> a -> b
$ (Text -> SourceLine) -> [Text] -> [SourceLine]
forall a b. (a -> b) -> [a] -> [b]
map (\Text
ln -> [(TokenType
NormalTok, Text
ln)])
                              ([Text] -> [SourceLine]) -> [Text] -> [SourceLine]
forall a b. (a -> b) -> a -> b
$ Text -> [Text]
T.lines Text
rawCode
              | Bool
otherwise  -> Text -> Either Text a
forall a b. a -> Either a b
Left Text
""
            Just Syntax
syntax  -> (String -> Either Text a)
-> (a -> Either Text a) -> Either String a -> Either Text a
forall a c b. (a -> c) -> (b -> c) -> Either a b -> c
either (Text -> Either Text a
forall a b. a -> Either a b
Left (Text -> Either Text a)
-> (String -> Text) -> String -> Either Text a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> Text
T.pack) a -> Either Text a
forall a b. b -> Either a b
Right (Either String a -> Either Text a)
-> Either String a -> Either Text a
forall a b. (a -> b) -> a -> b
$
              FormatOptions -> [SourceLine] -> a
formatter FormatOptions
fmtOpts{ codeClasses :: [Text]
codeClasses =
                                   [Text -> Text
T.toLower (Syntax -> Text
sShortname Syntax
syntax)],
                                  containerClasses :: [Text]
containerClasses = [Text]
classes } ([SourceLine] -> a)
-> Either String [SourceLine] -> Either String a
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$>
                TokenizerConfig -> Syntax -> Text -> Either String [SourceLine]
tokenize TokenizerConfig
tokenizeOpts Syntax
syntax Text
rawCode

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

langToListingsMap :: M.Map T.Text T.Text
langToListingsMap :: Map Text Text
langToListingsMap = [(Text, Text)] -> Map Text Text
forall k a. Ord k => [(k, a)] -> Map k a
M.fromList [(Text, Text)]
langsList

listingsToLangMap :: M.Map T.Text T.Text
listingsToLangMap :: Map Text Text
listingsToLangMap = [(Text, Text)] -> Map Text Text
forall k a. Ord k => [(k, a)] -> Map k a
M.fromList ([(Text, Text)] -> Map Text Text)
-> [(Text, Text)] -> Map Text Text
forall a b. (a -> b) -> a -> b
$ ((Text, Text) -> (Text, Text)) -> [(Text, Text)] -> [(Text, Text)]
forall a b. (a -> b) -> [a] -> [b]
map (Text, Text) -> (Text, Text)
forall b a. (b, a) -> (a, b)
switch [(Text, Text)]
langsList
  where switch :: (b, a) -> (a, b)
switch (b
a,a
b) = (a
b,b
a)

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

-- | Determine listings language name from skylighting language name.
toListingsLanguage :: T.Text -> Maybe T.Text
toListingsLanguage :: Text -> Maybe Text
toListingsLanguage Text
lang = Text -> Map Text Text -> Maybe Text
forall k a. Ord k => k -> Map k a -> Maybe a
M.lookup (Text -> Text
T.toLower Text
lang) Map Text Text
langToListingsMap

-- | Determine skylighting language name from listings language name.
fromListingsLanguage :: T.Text -> Maybe T.Text
fromListingsLanguage :: Text -> Maybe Text
fromListingsLanguage Text
lang = Text -> Map Text Text -> Maybe Text
forall k a. Ord k => k -> Map k a -> Maybe a
M.lookup Text
lang Map Text Text
listingsToLangMap