    {-
    Copyright (C) 2007-2015 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.Readers.TeXMath
       Copyright   : Copyright (C) 2007-2015 John MacFarlane
       License     : GNU GPL, version 2 or above

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

    Conversion of TeX math to a list of 'Pandoc' inline elements.
    -}
    module Text.Pandoc.Readers.TeXMath ( texMathToInlines ) where

    import Text.Pandoc.Definition
    import Text.TeXMath

    -- | Converts a raw TeX math formula to a list of 'Pandoc' inlines.
    -- Defaults to raw formula between @$@ or @$$@ characters if entire formula
    -- can't be converted.
    texMathToInlines :: MathType
                 -> String    -- ^ String to parse (assumes @'\n'@ line endings)
                 -> [Inline]
    texMathToInlines mt inp =
      case writePandoc dt `fmap` readTeX inp of
           Right (Just ils)  -> ils
           _                 -> [Str (delim ++ inp ++ delim)]
        where (dt, delim) = case mt of
                                 DisplayMath -> (DisplayBlock, "$$")
                                 InlineMath  -> (DisplayInline, "$")