{-# LANGUAGE OverloadedStrings #-}
-----------------------------------------------------------------------------
-- |
-- Module      :  Text.Trifecta.Highlight.Rendering.HTML
-- Copyright   :  (C) 2011 Edward Kmett
-- License     :  BSD-style (see the file LICENSE)
--
-- Maintainer  :  Edward Kmett <ekmett@gmail.com>
-- Stability   :  experimental
-- Portability :  non-portable
--
----------------------------------------------------------------------------
module Text.Trifecta.Highlight.Rendering.HTML 
  ( Doc(..)
  , doc
  ) where

import Data.Monoid
import Prelude hiding (head)
import Text.Blaze
import Text.Blaze.Html5 hiding (b,i)
import Text.Blaze.Html5.Attributes hiding (title)
import Text.Trifecta.Highlight.Class
import Text.Trifecta.Rope.Highlighted

-- | Represents a source file like an HsColour rendered document
data Doc = Doc 
  { docTitle   :: String
  , docCss     :: String -- href for the css file
  , docContent :: HighlightedRope
  }

-- | 
--
-- > renderHtml $ toHtml $ addHighlights highlightedRope $ doc "Foo.hs"
doc :: String -> Doc
doc t = Doc t "trifecta.css" mempty

instance ToHtml Doc where
  toHtml (Doc t css cs) = docTypeHtml $ do
    head $ do
      preEscapedString "<!-- Generated by trifecta, http://github.com/ekmett/trifecta/ -->\n"
      title $ toHtml t
      link ! rel "stylesheet" ! type_ "text/css" ! href (toValue css)
    body $ toHtml cs

instance Highlightable Doc where 
  addHighlights h (Doc t c r) = Doc t c (addHighlights h r)