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{-
Copyright (C) 2006-2010 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.Writers.Native
Copyright : Copyright (C) 2006-2010 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Utility functions and definitions used by the various Pandoc modules.
-}
module Text.Pandoc.Writers.Native ( writeNative )
where
import Text.Pandoc.Shared ( WriterOptions )
import Data.List ( intercalate )
import Text.Pandoc.Definition
-- | Indent string as a block.
indentBy :: Int -- ^ Number of spaces to indent the block
-> Int -- ^ Number of spaces (rel to block) to indent first line
-> String -- ^ Contents of block to indent
-> String
indentBy _ _ [] = ""
indentBy num first str =
let (firstLine:restLines) = lines str
firstLineIndent = num + first
in (replicate firstLineIndent ' ') ++ firstLine ++ "\n" ++
(intercalate "\n" $ map ((replicate num ' ') ++ ) restLines)
-- | Prettyprint list of Pandoc blocks elements.
prettyBlockList :: Int -- ^ Number of spaces to indent list of blocks
-> [Block] -- ^ List of blocks
-> String
prettyBlockList indent [] = indentBy indent 0 "[]"
prettyBlockList indent blocks = indentBy indent (-2) $ "[ " ++
(intercalate "\n, " (map prettyBlock blocks)) ++ " ]"
-- | Prettyprint Pandoc block element.
prettyBlock :: Block -> String
prettyBlock (BlockQuote blocks) = "BlockQuote\n " ++
(prettyBlockList 2 blocks)
prettyBlock (OrderedList attribs blockLists) =
"OrderedList " ++ show attribs ++ "\n" ++ indentBy 2 0 ("[ " ++
(intercalate ", " $ map (\blocks -> prettyBlockList 2 blocks)
blockLists)) ++ " ]"
prettyBlock (BulletList blockLists) = "BulletList\n" ++
indentBy 2 0 ("[ " ++ (intercalate ", "
(map (\blocks -> prettyBlockList 2 blocks) blockLists))) ++ " ]"
prettyBlock (DefinitionList items) = "DefinitionList\n" ++
indentBy 2 0 ("[ " ++ (intercalate "\n, "
(map (\(term, defs) -> "(" ++ show term ++ ",\n" ++
indentBy 3 0 ("[ " ++ (intercalate ", "
(map (\blocks -> prettyBlockList 2 blocks) defs)) ++ "]") ++
")") items))) ++ " ]"
prettyBlock (Table caption aligns widths header rows) =
"Table " ++ show caption ++ " " ++ show aligns ++ " " ++
show widths ++ "\n" ++ prettyRow header ++ " [\n" ++
(intercalate ",\n" (map prettyRow rows)) ++ " ]"
where prettyRow cols = indentBy 2 0 ("[ " ++ (intercalate ", "
(map (\blocks -> prettyBlockList 2 blocks)
cols))) ++ " ]"
prettyBlock block = show block
-- | Prettyprint Pandoc document.
writeNative :: WriterOptions -> Pandoc -> String
writeNative _ (Pandoc meta blocks) = "Pandoc " ++ "(" ++ show meta ++
")\n" ++ (prettyBlockList 0 blocks) ++ "\n"
|
