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{-
Copyright (C) 2008 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 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 ( languages
, languagesByExtension
, highlight
, formatLaTeXInline
, formatLaTeXBlock
, styleToLaTeX
, formatHtmlInline
, formatHtmlBlock
, styleToCss
, pygments
, espresso
, zenburn
, tango
, kate
, monochrome
, haddock
, Style
) where
import Text.Pandoc.Definition
import Text.Pandoc.Shared (safeRead)
import Text.Highlighting.Kate
import Data.List (find)
import Data.Maybe (fromMaybe)
import Data.Char (toLower)
lcLanguages :: [String]
lcLanguages = map (map toLower) languages
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 = case safeRead (fromMaybe "1" $ lookup "startFrom" keyvals) of
Just n -> n
Nothing -> 1
fmtOpts = defaultFormatOpts{
startNumber = firstNum,
numberLines = any (`elem`
["number","numberLines", "number-lines"]) classes }
lcclasses = map (map toLower) classes
in case find (`elem` lcLanguages) lcclasses of
Nothing -> Nothing
Just language -> Just
$ formatter fmtOpts{ codeClasses = [language],
containerClasses = classes }
$ highlightAs language rawCode
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