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{- Copyright © 2015 Benjamin Barenblat
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 3 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, see <http://www.gnu.org/licenses/>. -}
module Weave (weave) where
import Fragment
weave :: [Fragment] -> Either String String
weave = Right . concatMap weaveFragment
weaveFragment :: Fragment -> String
weaveFragment (Documentation text) = text
weaveFragment (BlockCode name body) =
"\\begin{LytBlockCode}{" ++ name ++ "}\n"
++ weaveBlockBody body
++ "\\end{LytBlockCode}\n"
weaveBlockBody :: [CodeOrReference] -> String
weaveBlockBody ((Code first):rest) =
{- The first block is code. To make sure it gets typeset correctly, drop
everything up to the first newline or non-space character. -}
(case dropWhile (==' ') first of
'\n' : first' -> first'
first' -> first')
++ concatMap weaveCodeOrReference rest
weaveBlockBody blocks = concatMap weaveCodeOrReference blocks
weaveCodeOrReference :: CodeOrReference -> String
weaveCodeOrReference (Code text) = text
weaveCodeOrReference (Reference name) = "\\LytFragmentReference{" ++ name ++ "}"
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