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{-
Copyright (C) 2007 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.ConTeXt
Copyright : Copyright (C) 2007 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Conversion of 'Pandoc' format into ConTeXt.
-}
module Text.Pandoc.Writers.ConTeXt ( writeConTeXt ) where
import Text.Pandoc.Definition
import Text.Pandoc.Shared
import Text.Printf ( printf )
import Data.List ( (\\), intersperse )
import Control.Monad.State
import Text.PrettyPrint.HughesPJ hiding ( Str )
type WriterState = Int -- number of next URL reference
-- | Convert Pandoc to ConTeXt.
writeConTeXt :: WriterOptions -> Pandoc -> String
writeConTeXt options document = render $
evalState (pandocToConTeXt options document) 1
pandocToConTeXt :: WriterOptions -> Pandoc -> State WriterState Doc
pandocToConTeXt options (Pandoc meta blocks) = do
main <- blockListToConTeXt options blocks
let before = if null (writerIncludeBefore options)
then empty
else text $ writerIncludeBefore options
let after = if null (writerIncludeAfter options)
then empty
else text $ writerIncludeAfter options
let body = before $$ main $$ after
head <- if writerStandalone options
then contextHeader options meta
else return empty
let toc = if writerTableOfContents options
then text "\\placecontent\n"
else empty
let foot = if writerStandalone options
then text "\\stoptext\n"
else empty
return $ head $$ toc $$ body $$ foot
-- | Insert bibliographic information into ConTeXt header.
contextHeader :: WriterOptions -- ^ Options, including ConTeXt header
-> Meta -- ^ Meta with bibliographic information
-> State WriterState Doc
contextHeader options (Meta title authors date) = do
titletext <- if null title
then return empty
else inlineListToConTeXt options title
let authorstext = if null authors
then ""
else if length authors == 1
then stringToConTeXt $ head authors
else stringToConTeXt $ (joinWithSep ", " $
init authors) ++ " & " ++ last authors
let datetext = if date == ""
then ""
else stringToConTeXt date
let titleblock = text "\\doctitle{" <> titletext <> char '}' $$
text ("\\author{" ++ authorstext ++ "}") $$
text ("\\date{" ++ datetext ++ "}")
let header = text $ writerHeader options
return $ header $$ titleblock $$ text "\\starttext\n\\maketitle\n"
-- escape things as needed for ConTeXt
escapeCharForConTeXt :: Char -> String
escapeCharForConTeXt ch =
case ch of
'{' -> "\\letteropenbrace{}"
'}' -> "\\letterclosebrace{}"
'\\' -> "\\letterbackslash{}"
'$' -> "\\$"
'|' -> "\\letterbar{}"
'^' -> "\\letterhat{}"
'%' -> "\\%"
'~' -> "\\lettertilde{}"
'&' -> "\\&"
'#' -> "\\#"
'<' -> "\\letterless{}"
'>' -> "\\lettermore{}"
'_' -> "\\letterunderscore{}"
x -> [x]
-- | Escape string for ConTeXt
stringToConTeXt :: String -> String
stringToConTeXt = concatMap escapeCharForConTeXt
-- | Convert Pandoc block element to ConTeXt.
blockToConTeXt :: WriterOptions
-> Block
-> State WriterState Doc
blockToConTeXt opts Null = return empty
blockToConTeXt opts (Plain lst) =
wrapTeXIfNeeded opts (inlineListToConTeXt opts) lst >>= return
blockToConTeXt opts (Para lst) =
wrapTeXIfNeeded opts (inlineListToConTeXt opts) lst >>= return . (<> char '\n')
blockToConTeXt opts (BlockQuote lst) = do
contents <- blockListToConTeXt opts lst
return $ text "\\startblockquote\n" $$ contents $$ text "\\stopblockquote"
blockToConTeXt opts (CodeBlock str) =
return $ text $ "\\starttyping\n" ++ str ++ "\n\\stoptyping\n" -- \n needed
-- because \stoptyping can't have anything after it
blockToConTeXt opts (RawHtml str) = return empty
blockToConTeXt opts (BulletList lst) = do
contents <- mapM (listItemToConTeXt opts) lst
return $ text "\\startltxitem" $$ vcat contents $$ text "\\stopltxitem"
blockToConTeXt opts (OrderedList attribs lst) = case attribs of
(1, DefaultStyle, DefaultDelim) -> do
contents <- mapM (listItemToConTeXt opts) lst
return $ text "\\startltxenum"$$ vcat contents $$ text "\\stopltxenum"
_ -> do
let markers = take (length lst) $ orderedListMarkers attribs
contents <- zipWithM (orderedListItemToConTeXt opts) markers lst
let markerWidth = maximum $ map length markers
let markerWidth' = if markerWidth < 3
then ""
else "[width=" ++
show ((markerWidth + 2) `div` 2) ++ "em]"
return $ text ("\\startitemize" ++ markerWidth') $$ vcat contents $$
text "\\stopitemize"
blockToConTeXt opts (DefinitionList lst) =
mapM (defListItemToConTeXt opts) lst >>= return . (<> char '\n') . vcat
blockToConTeXt opts HorizontalRule = return $ text "\\thinrule\n"
blockToConTeXt opts (Header level lst) = do
contents <- inlineListToConTeXt opts lst
let base = if writerNumberSections opts then "section" else "subject"
return $ if level > 0 && level <= 3
then char '\\' <> text (concat (replicate (level - 1) "sub")) <>
text base <> char '{' <> contents <> char '}' <> char '\n'
else contents <> char '\n'
blockToConTeXt opts (Table caption aligns widths heads rows) = do
let colWidths = map printDecimal widths
let colDescriptor colWidth alignment = (case alignment of
AlignLeft -> 'l'
AlignRight -> 'r'
AlignCenter -> 'c'
AlignDefault -> 'l'):
"p(" ++ colWidth ++ "\\textwidth)|"
let colDescriptors = "|" ++ (concat $
zipWith colDescriptor colWidths aligns)
headers <- tableRowToConTeXt opts heads
captionText <- inlineListToConTeXt opts caption
let captionText' = if null caption then text "none" else captionText
rows' <- mapM (tableRowToConTeXt opts) rows
return $ text "\\placetable[here]{" <> captionText' <> char '}' $$
text "\\starttable[" <> text colDescriptors <> char ']' $$
text "\\HL" $$ headers $$ text "\\HL" $$
vcat rows' $$ text "\\HL\n\\stoptable\n"
printDecimal :: Float -> String
printDecimal = printf "%.2f"
tableRowToConTeXt opts cols = do
cols' <- mapM (blockListToConTeXt opts) cols
return $ (vcat (map (text "\\NC " <>) cols')) $$
text "\\NC\\AR"
listItemToConTeXt opts list = blockListToConTeXt opts list >>=
return . (text "\\item " $$) . (nest 2)
orderedListItemToConTeXt opts marker list = blockListToConTeXt opts list >>=
return . (text ("\\sym{" ++ marker ++ "} ") $$) . (nest 2)
defListItemToConTeXt opts (term, def) = do
term' <- inlineListToConTeXt opts term
def' <- blockListToConTeXt opts def
return $ text "\\startdescr{" <> term' <> char '}' $$ def' $$ text "\\stopdescr"
-- | Convert list of block elements to ConTeXt.
blockListToConTeXt :: WriterOptions -> [Block] -> State WriterState Doc
blockListToConTeXt opts lst = mapM (blockToConTeXt opts) lst >>= return . vcat
-- | Convert list of inline elements to ConTeXt.
inlineListToConTeXt :: WriterOptions
-> [Inline] -- ^ Inlines to convert
-> State WriterState Doc
inlineListToConTeXt opts lst = mapM (inlineToConTeXt opts) lst >>= return . hcat
isQuoted :: Inline -> Bool
isQuoted (Quoted _ _) = True
isQuoted Apostrophe = True
isQuoted _ = False
-- | Convert inline element to ConTeXt
inlineToConTeXt :: WriterOptions
-> Inline -- ^ Inline to convert
-> State WriterState Doc
inlineToConTeXt opts (Emph lst) = do
contents <- inlineListToConTeXt opts lst
return $ text "{\\em " <> contents <> char '}'
inlineToConTeXt opts (Strong lst) = do
contents <- inlineListToConTeXt opts lst
return $ text "{\\bf " <> contents <> char '}'
inlineToConTeXt opts (Strikeout lst) = do
contents <- inlineListToConTeXt opts lst
return $ text "\\overstrikes{" <> contents <> char '}'
inlineToConTeXt opts (Superscript lst) = do
contents <- inlineListToConTeXt opts lst
return $ text "\\high{" <> contents <> char '}'
inlineToConTeXt opts (Subscript lst) = do
contents <- inlineListToConTeXt opts lst
return $ text "\\low{" <> contents <> char '}'
inlineToConTeXt opts (Code str) = return $ text $ "\\type{" ++ str ++ "}"
inlineToConTeXt opts (Quoted SingleQuote lst) = do
contents <- inlineListToConTeXt opts lst
return $ text "\\quote{" <> contents <> char '}'
inlineToConTeXt opts (Quoted DoubleQuote lst) = do
contents <- inlineListToConTeXt opts lst
return $ text "\\quotation{" <> contents <> char '}'
inlineToConTeXt opts Apostrophe = return $ char '\''
inlineToConTeXt opts EmDash = return $ text "---"
inlineToConTeXt opts EnDash = return $ text "--"
inlineToConTeXt opts Ellipses = return $ text "\\ldots{}"
inlineToConTeXt opts (Str str) = return $ text $ stringToConTeXt str
inlineToConTeXt opts (TeX str) = return $ text str
inlineToConTeXt opts (HtmlInline str) = return empty
inlineToConTeXt opts (LineBreak) = return $ text "\\crlf\n"
inlineToConTeXt opts Space = return $ char ' '
inlineToConTeXt opts (Link [Code str] (src, tit)) = -- since ConTeXt has its own
inlineToConTeXt opts (Link [Str str] (src, tit)) -- way of printing links...
inlineToConTeXt opts (Link txt (src, _)) = do
next <- get
put (next + 1)
let ref = show next
label <- inlineListToConTeXt opts txt
return $ text "\\useurl[" <> text ref <> text "][" <> text src <>
text "][][" <> label <> text "]\\from[" <> text ref <> char ']'
inlineToConTeXt opts (Image alternate (src, tit)) = do
alt <- inlineListToConTeXt opts alternate
return $ text "\\placefigure\n[]\n[fig:" <> alt <> text "]\n{" <>
text tit <> text "}\n{\\externalfigure[" <> text src <> text "]}"
inlineToConTeXt opts (Note contents) = do
contents' <- blockListToConTeXt opts contents
return $ text "\\footnote{" <>
text (stripTrailingNewlines $ render contents') <>
char '}'
|