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{-# LANGUAGE OverloadedStrings #-}
{- |
Module : Text.Pandoc.Writers.Native
Copyright : Copyright (C) 2006-2020 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Conversion of a 'Pandoc' document to a string representation.
-}
module Text.Pandoc.Writers.Native ( writeNative )
where
import Data.List (intersperse)
import Data.Text (Text)
import Text.Pandoc.Class.PandocMonad (PandocMonad)
import Text.Pandoc.Definition
import Text.Pandoc.Options (WrapOption (..), WriterOptions (..))
import Text.DocLayout
prettyList :: [Doc Text] -> Doc Text
prettyList ds =
"[" <>
mconcat (intersperse (cr <> ",") $ map (nest 1) ds) <> "]"
-- | Prettyprint Pandoc block element.
prettyBlock :: Block -> Doc Text
prettyBlock (LineBlock lines') =
"LineBlock" $$ prettyList (map (text . show) lines')
prettyBlock (BlockQuote blocks) =
"BlockQuote" $$ prettyList (map prettyBlock blocks)
prettyBlock (OrderedList attribs blockLists) =
"OrderedList" <> space <> text (show attribs) $$
prettyList (map (prettyList . map prettyBlock) blockLists)
prettyBlock (BulletList blockLists) =
"BulletList" $$
prettyList (map (prettyList . map prettyBlock) blockLists)
prettyBlock (DefinitionList items) = "DefinitionList" $$
prettyList (map deflistitem items)
where deflistitem (term, defs) = "(" <> text (show term) <> "," <> cr <>
nest 1 (prettyList $ map (prettyList . map prettyBlock) defs) <> ")"
prettyBlock (Table caption aligns widths header rows) =
"Table " <> text (show caption) <> " " <> text (show aligns) <> " " <>
text (show widths) $$
prettyRow header $$
prettyList (map prettyRow rows)
where prettyRow cols = prettyList (map (prettyList . map prettyBlock) cols)
prettyBlock (Div attr blocks) =
text ("Div " <> show attr) $$ prettyList (map prettyBlock blocks)
prettyBlock block = text $ show block
-- | Prettyprint Pandoc document.
writeNative :: PandocMonad m => WriterOptions -> Pandoc -> m Text
writeNative opts (Pandoc meta blocks) = return $
let colwidth = if writerWrapText opts == WrapAuto
then Just $ writerColumns opts
else Nothing
withHead = case writerTemplate opts of
Just _ -> \bs -> text ("Pandoc (" ++ show meta ++ ")") $$
bs $$ cr
Nothing -> id
in render colwidth $ withHead $ prettyList $ map prettyBlock blocks
|
