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|
{-# LANGUAGE NoImplicitPrelude #-}
module Text.Pandoc.Writers.Math
( texMathToInlines
, convertMath
, defaultMathJaxURL
, defaultKaTeXURL
)
where
import Prelude
import Text.Pandoc.Class
import Text.Pandoc.Definition
import Text.Pandoc.Logging
import Text.TeXMath (DisplayType (..), Exp, readTeX, writePandoc)
-- | Converts a raw TeX math formula to a list of 'Pandoc' inlines.
-- Defaults to raw formula between @$@ or @$$@ characters if entire formula
-- can't be converted.
texMathToInlines :: PandocMonad m
=> MathType
-> String -- ^ String to parse (assumes @'\n'@ line endings)
-> m [Inline]
texMathToInlines mt inp = do
res <- convertMath writePandoc mt inp
case res of
Right (Just ils) -> return ils
Right Nothing -> do
report $ CouldNotConvertTeXMath inp ""
return [mkFallback mt inp]
Left il -> return [il]
mkFallback :: MathType -> String -> Inline
mkFallback mt str = Str (delim ++ str ++ delim)
where delim = case mt of
DisplayMath -> "$$"
InlineMath -> "$"
-- | Converts a raw TeX math formula using a writer function,
-- issuing a warning and producing a fallback (a raw string)
-- on failure.
convertMath :: PandocMonad m
=> (DisplayType -> [Exp] -> a) -> MathType -> String
-> m (Either Inline a)
convertMath writer mt str =
case writer dt <$> readTeX str of
Right r -> return (Right r)
Left e -> do
report $ CouldNotConvertTeXMath str e
return (Left $ mkFallback mt str)
where dt = case mt of
DisplayMath -> DisplayBlock
InlineMath -> DisplayInline
defaultMathJaxURL :: String
defaultMathJaxURL = "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/"
defaultKaTeXURL :: String
defaultKaTeXURL = "https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.9.0/"
|
