module Anansi.Loom.LaTeX (loomLaTeX) where
import qualified Data.Text.Lazy as TL
import Control.Monad (forM_)
import Control.Monad.Writer (tell)
import Anansi.Types
import Anansi.Loom
loomLaTeX :: Loom
loomLaTeX = Loom "latex" $ mapM_ putBlock where
putBlock b = case b of
BlockText text -> tell text
BlockFile path content -> do
tell "\\begin{alltt}\n"
tell "{\\bf\\(\\gg\\) "
tell $ escape path
tell "}\n"
putContent content
tell "\\end{alltt}\n"
BlockDefine name content -> do
tell "\\begin{alltt}\n"
tell "{\\bf\\(\\ll\\)"
tell $ escape name
tell "\\(\\gg\\)}\n"
putContent content
tell "\\end{alltt}\n"
putContent cs = forM_ cs $ \c -> case c of
ContentText _ text -> tell . escape $ TL.append text "\n"
ContentMacro _ indent name -> tell $ formatMacro indent name
formatMacro :: TL.Text -> TL.Text -> TL.Text
formatMacro indent name = TL.concat [escape indent, "|\\emph{", escape name, "}|\n"]
escape :: TL.Text -> TL.Text
escape = TL.concatMap $ \c -> case c of
'\t' -> " "
'\\' -> "\\textbackslash{}"
'{' -> "\\{"
'}' -> "\\}"
'_' -> "\\_"
_ -> TL.singleton c