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{-# LANGUAGE OverloadedStrings #-}
{-
Copyright (C) 2006-2015 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.AsciiDoc
Copyright : Copyright (C) 2006-2015 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Conversion of 'Pandoc' documents to asciidoc.
Note that some information may be lost in conversion, due to
expressive limitations of asciidoc. Footnotes and table cells with
paragraphs (or other block items) are not possible in asciidoc.
If pandoc encounters one of these, it will insert a message indicating
that it has omitted the construct.
AsciiDoc: <http://www.methods.co.nz/asciidoc/>
-}
module Text.Pandoc.Writers.AsciiDoc (writeAsciiDoc) where
import Text.Pandoc.Definition
import Text.Pandoc.Templates (renderTemplate')
import Text.Pandoc.Shared
import Text.Pandoc.Writers.Shared
import Text.Pandoc.Options
import Text.Pandoc.Parsing hiding (blankline, space)
import Data.Maybe (fromMaybe)
import Data.List ( stripPrefix, intersperse, intercalate )
import Text.Pandoc.Pretty
import Text.Pandoc.ImageSize
import Control.Monad.State
import qualified Data.Map as M
import Data.Aeson (Value(String), fromJSON, toJSON, Result(..))
import qualified Data.Text as T
import Data.Char (isSpace, isPunctuation)
data WriterState = WriterState { defListMarker :: String
, orderedListLevel :: Int
, bulletListLevel :: Int
, intraword :: Bool
}
-- | Convert Pandoc to AsciiDoc.
writeAsciiDoc :: WriterOptions -> Pandoc -> String
writeAsciiDoc opts document =
evalState (pandocToAsciiDoc opts document) WriterState{
defListMarker = "::"
, orderedListLevel = 1
, bulletListLevel = 1
, intraword = False
}
-- | Return asciidoc representation of document.
pandocToAsciiDoc :: WriterOptions -> Pandoc -> State WriterState String
pandocToAsciiDoc opts (Pandoc meta blocks) = do
let titleblock = not $ null (docTitle meta) && null (docAuthors meta) &&
null (docDate meta)
let colwidth = if writerWrapText opts == WrapAuto
then Just $ writerColumns opts
else Nothing
metadata <- metaToJSON opts
(fmap (render colwidth) . blockListToAsciiDoc opts)
(fmap (render colwidth) . inlineListToAsciiDoc opts)
meta
let addTitleLine (String t) = String $
t <> "\n" <> T.replicate (T.length t) "="
addTitleLine x = x
let metadata' = case fromJSON metadata of
Success m -> toJSON $ M.adjust addTitleLine
("title" :: T.Text) m
_ -> metadata
body <- blockListToAsciiDoc opts blocks
let main = render colwidth body
let context = defField "body" main
$ defField "toc"
(writerTableOfContents opts &&
writerTemplate opts /= Nothing)
$ defField "titleblock" titleblock
$ metadata'
case writerTemplate opts of
Nothing -> return main
Just tpl -> return $ renderTemplate' tpl context
-- | Escape special characters for AsciiDoc.
escapeString :: String -> String
escapeString = escapeStringUsing escs
where escs = backslashEscapes "{"
-- | Ordered list start parser for use in Para below.
olMarker :: Parser [Char] ParserState Char
olMarker = do (start, style', delim) <- anyOrderedListMarker
if delim == Period &&
(style' == UpperAlpha || (style' == UpperRoman &&
start `elem` [1, 5, 10, 50, 100, 500, 1000]))
then spaceChar >> spaceChar
else spaceChar
-- | True if string begins with an ordered list marker
beginsWithOrderedListMarker :: String -> Bool
beginsWithOrderedListMarker str =
case runParser olMarker defaultParserState "para start" (take 10 str) of
Left _ -> False
Right _ -> True
-- | Convert Pandoc block element to asciidoc.
blockToAsciiDoc :: WriterOptions -- ^ Options
-> Block -- ^ Block element
-> State WriterState Doc
blockToAsciiDoc _ Null = return empty
blockToAsciiDoc opts (Plain inlines) = do
contents <- inlineListToAsciiDoc opts inlines
return $ contents <> blankline
blockToAsciiDoc opts (Para [Image attr alt (src,'f':'i':'g':':':tit)]) = do
blockToAsciiDoc opts (Para [Image attr alt (src,tit)])
blockToAsciiDoc opts (Para inlines) = do
contents <- inlineListToAsciiDoc opts inlines
-- escape if para starts with ordered list marker
let esc = if beginsWithOrderedListMarker (render Nothing contents)
then text "\\"
else empty
return $ esc <> contents <> blankline
blockToAsciiDoc opts (LineBlock lns) = do
let docify line = if null line
then return blankline
else inlineListToAsciiDoc opts line
let joinWithLinefeeds = nowrap . mconcat . intersperse cr
contents <- joinWithLinefeeds <$> mapM docify lns
return $ "[verse]" $$ text "--" $$ contents $$ text "--" $$ blankline
blockToAsciiDoc _ (RawBlock f s)
| f == "asciidoc" = return $ text s
| otherwise = return empty
blockToAsciiDoc _ HorizontalRule =
return $ blankline <> text "'''''" <> blankline
blockToAsciiDoc opts (Header level (ident,_,_) inlines) = do
contents <- inlineListToAsciiDoc opts inlines
let len = offset contents
-- ident seem to be empty most of the time and asciidoc will generate them automatically
-- so lets make them not show up when null
let identifier = if (null ident) then empty else ("[[" <> text ident <> "]]")
let setext = writerSetextHeaders opts
return $
(if setext
then
identifier $$ contents $$
(case level of
1 -> text $ replicate len '-'
2 -> text $ replicate len '~'
3 -> text $ replicate len '^'
4 -> text $ replicate len '+'
_ -> empty) <> blankline
else
identifier $$ text (replicate level '=') <> space <> contents <> blankline)
blockToAsciiDoc _ (CodeBlock (_,classes,_) str) = return $ (flush $
if null classes
then "...." $$ text str $$ "...."
else attrs $$ "----" $$ text str $$ "----")
<> blankline
where attrs = "[" <> text (intercalate "," ("source" : classes)) <> "]"
blockToAsciiDoc opts (BlockQuote blocks) = do
contents <- blockListToAsciiDoc opts blocks
let isBlock (BlockQuote _) = True
isBlock _ = False
-- if there are nested block quotes, put in an open block
let contents' = if any isBlock blocks
then "--" $$ contents $$ "--"
else contents
let cols = offset contents'
let bar = text $ replicate cols '_'
return $ bar $$ chomp contents' $$ bar <> blankline
blockToAsciiDoc opts (Table caption aligns widths headers rows) = do
caption' <- inlineListToAsciiDoc opts caption
let caption'' = if null caption
then empty
else "." <> caption' <> cr
let isSimple = all (== 0) widths
let relativePercentWidths = if isSimple
then widths
else map (/ (sum widths)) widths
let widths'' :: [Integer]
widths'' = map (floor . (* 100)) relativePercentWidths
-- ensure that the widths sum to 100
let widths' = case widths'' of
_ | isSimple -> widths''
(w:ws) | sum (w:ws) < 100
-> (100 - sum ws) : ws
ws -> ws
let totalwidth :: Integer
totalwidth = floor $ sum widths * 100
let colspec al wi = (case al of
AlignLeft -> "<"
AlignCenter -> "^"
AlignRight -> ">"
AlignDefault -> "") ++
if wi == 0 then "" else (show wi ++ "%")
let headerspec = if all null headers
then empty
else text "options=\"header\","
let widthspec = if totalwidth == 0
then empty
else text "width="
<> doubleQuotes (text $ show totalwidth ++ "%")
<> text ","
let tablespec = text "["
<> widthspec
<> text "cols="
<> doubleQuotes (text $ intercalate ","
$ zipWith colspec aligns widths')
<> text ","
<> headerspec <> text "]"
let makeCell [Plain x] = do d <- blockListToAsciiDoc opts [Plain x]
return $ text "|" <> chomp d
makeCell [Para x] = makeCell [Plain x]
makeCell [] = return $ text "|"
makeCell bs = do d <- blockListToAsciiDoc opts bs
return $ text "a|" $$ d
let makeRow cells = hsep `fmap` mapM makeCell cells
rows' <- mapM makeRow rows
head' <- makeRow headers
let head'' = if all null headers then empty else head'
let colwidth = if writerWrapText opts == WrapAuto
then writerColumns opts
else 100000
let maxwidth = maximum $ map offset (head':rows')
let body = if maxwidth > colwidth then vsep rows' else vcat rows'
let border = text $ "|" ++ replicate (max 5 (min maxwidth colwidth) - 1) '='
return $
caption'' $$ tablespec $$ border $$ head'' $$ body $$ border $$ blankline
blockToAsciiDoc opts (BulletList items) = do
contents <- mapM (bulletListItemToAsciiDoc opts) items
return $ cat contents <> blankline
blockToAsciiDoc opts (OrderedList (_start, sty, _delim) items) = do
let sty' = case sty of
UpperRoman -> UpperAlpha
LowerRoman -> LowerAlpha
x -> x
let markers = orderedListMarkers (1, sty', Period) -- start num not used
let markers' = map (\m -> if length m < 3
then m ++ replicate (3 - length m) ' '
else m) markers
contents <- mapM (\(item, num) -> orderedListItemToAsciiDoc opts item num) $
zip markers' items
return $ cat contents <> blankline
blockToAsciiDoc opts (DefinitionList items) = do
contents <- mapM (definitionListItemToAsciiDoc opts) items
return $ cat contents <> blankline
blockToAsciiDoc opts (Div (ident,_,_) bs) = do
let identifier = if (null ident) then empty else ("[[" <> text ident <> "]]")
contents <- blockListToAsciiDoc opts bs
return $ identifier $$ contents
-- | Convert bullet list item (list of blocks) to asciidoc.
bulletListItemToAsciiDoc :: WriterOptions -> [Block] -> State WriterState Doc
bulletListItemToAsciiDoc opts blocks = do
let addBlock :: Doc -> Block -> State WriterState Doc
addBlock d b | isEmpty d = chomp `fmap` blockToAsciiDoc opts b
addBlock d b@(BulletList _) = do x <- blockToAsciiDoc opts b
return $ d <> cr <> chomp x
addBlock d b@(OrderedList _ _) = do x <- blockToAsciiDoc opts b
return $ d <> cr <> chomp x
addBlock d b = do x <- blockToAsciiDoc opts b
return $ d <> cr <> text "+" <> cr <> chomp x
lev <- bulletListLevel `fmap` get
modify $ \s -> s{ bulletListLevel = lev + 1 }
contents <- foldM addBlock empty blocks
modify $ \s -> s{ bulletListLevel = lev }
let marker = text (replicate lev '*')
return $ marker <> text " " <> contents <> cr
-- | Convert ordered list item (a list of blocks) to asciidoc.
orderedListItemToAsciiDoc :: WriterOptions -- ^ options
-> String -- ^ list item marker
-> [Block] -- ^ list item (list of blocks)
-> State WriterState Doc
orderedListItemToAsciiDoc opts marker blocks = do
let addBlock :: Doc -> Block -> State WriterState Doc
addBlock d b | isEmpty d = chomp `fmap` blockToAsciiDoc opts b
addBlock d b@(BulletList _) = do x <- blockToAsciiDoc opts b
return $ d <> cr <> chomp x
addBlock d b@(OrderedList _ _) = do x <- blockToAsciiDoc opts b
return $ d <> cr <> chomp x
addBlock d b = do x <- blockToAsciiDoc opts b
return $ d <> cr <> text "+" <> cr <> chomp x
lev <- orderedListLevel `fmap` get
modify $ \s -> s{ orderedListLevel = lev + 1 }
contents <- foldM addBlock empty blocks
modify $ \s -> s{ orderedListLevel = lev }
return $ text marker <> text " " <> contents <> cr
-- | Convert definition list item (label, list of blocks) to asciidoc.
definitionListItemToAsciiDoc :: WriterOptions
-> ([Inline],[[Block]])
-> State WriterState Doc
definitionListItemToAsciiDoc opts (label, defs) = do
labelText <- inlineListToAsciiDoc opts label
marker <- defListMarker `fmap` get
if marker == "::"
then modify (\st -> st{ defListMarker = ";;"})
else modify (\st -> st{ defListMarker = "::"})
let divider = cr <> text "+" <> cr
let defsToAsciiDoc :: [Block] -> State WriterState Doc
defsToAsciiDoc ds = (vcat . intersperse divider . map chomp)
`fmap` mapM (blockToAsciiDoc opts) ds
defs' <- mapM defsToAsciiDoc defs
modify (\st -> st{ defListMarker = marker })
let contents = nest 2 $ vcat $ intersperse divider $ map chomp defs'
return $ labelText <> text marker <> cr <> contents <> cr
-- | Convert list of Pandoc block elements to asciidoc.
blockListToAsciiDoc :: WriterOptions -- ^ Options
-> [Block] -- ^ List of block elements
-> State WriterState Doc
blockListToAsciiDoc opts blocks = cat `fmap` mapM (blockToAsciiDoc opts) blocks
data SpacyLocation = End | Start
-- | Convert list of Pandoc inline elements to asciidoc.
inlineListToAsciiDoc :: WriterOptions -> [Inline] -> State WriterState Doc
inlineListToAsciiDoc opts lst = do
oldIntraword <- gets intraword
setIntraword False
result <- go lst
setIntraword oldIntraword
return result
where go [] = return empty
go (y:x:xs)
| not (isSpacy End y) = do
y' <- if isSpacy Start x
then inlineToAsciiDoc opts y
else withIntraword $ inlineToAsciiDoc opts y
x' <- withIntraword $ inlineToAsciiDoc opts x
xs' <- go xs
return (y' <> x' <> xs')
| not (isSpacy Start x) = do
y' <- withIntraword $ inlineToAsciiDoc opts y
xs' <- go (x:xs)
return (y' <> xs')
go (x:xs) = do
x' <- inlineToAsciiDoc opts x
xs' <- go xs
return (x' <> xs')
isSpacy :: SpacyLocation -> Inline -> Bool
isSpacy _ Space = True
isSpacy _ LineBreak = True
isSpacy _ SoftBreak = True
-- Note that \W characters count as spacy in AsciiDoc
-- for purposes of determining interword:
isSpacy End (Str xs) = case reverse xs of
c:_ -> isPunctuation c || isSpace c
_ -> False
isSpacy Start (Str (c:_)) = isPunctuation c || isSpace c
isSpacy _ _ = False
setIntraword :: Bool -> State WriterState ()
setIntraword b = modify $ \st -> st{ intraword = b }
withIntraword :: State WriterState a -> State WriterState a
withIntraword p = setIntraword True *> p <* setIntraword False
-- | Convert Pandoc inline element to asciidoc.
inlineToAsciiDoc :: WriterOptions -> Inline -> State WriterState Doc
inlineToAsciiDoc opts (Emph lst) = do
contents <- inlineListToAsciiDoc opts lst
isIntraword <- gets intraword
let marker = if isIntraword then "__" else "_"
return $ marker <> contents <> marker
inlineToAsciiDoc opts (Strong lst) = do
contents <- inlineListToAsciiDoc opts lst
isIntraword <- gets intraword
let marker = if isIntraword then "**" else "*"
return $ marker <> contents <> marker
inlineToAsciiDoc opts (Strikeout lst) = do
contents <- inlineListToAsciiDoc opts lst
return $ "[line-through]*" <> contents <> "*"
inlineToAsciiDoc opts (Superscript lst) = do
contents <- inlineListToAsciiDoc opts lst
return $ "^" <> contents <> "^"
inlineToAsciiDoc opts (Subscript lst) = do
contents <- inlineListToAsciiDoc opts lst
return $ "~" <> contents <> "~"
inlineToAsciiDoc opts (SmallCaps lst) = inlineListToAsciiDoc opts lst
inlineToAsciiDoc opts (Quoted SingleQuote lst) =
inlineListToAsciiDoc opts (Str "`" : lst ++ [Str "'"])
inlineToAsciiDoc opts (Quoted DoubleQuote lst) =
inlineListToAsciiDoc opts (Str "``" : lst ++ [Str "''"])
inlineToAsciiDoc _ (Code _ str) = return $
text "`" <> text (escapeStringUsing (backslashEscapes "`") str) <> "`"
inlineToAsciiDoc _ (Str str) = return $ text $ escapeString str
inlineToAsciiDoc _ (Math InlineMath str) =
return $ "latexmath:[$" <> text str <> "$]"
inlineToAsciiDoc _ (Math DisplayMath str) =
return $ "latexmath:[\\[" <> text str <> "\\]]"
inlineToAsciiDoc _ (RawInline f s)
| f == "asciidoc" = return $ text s
| otherwise = return empty
inlineToAsciiDoc _ (LineBreak) = return $ " +" <> cr
inlineToAsciiDoc _ Space = return space
inlineToAsciiDoc opts SoftBreak =
case writerWrapText opts of
WrapAuto -> return space
WrapPreserve -> return cr
WrapNone -> return space
inlineToAsciiDoc opts (Cite _ lst) = inlineListToAsciiDoc opts lst
inlineToAsciiDoc opts (Link _ txt (src, _tit)) = do
-- relative: link:downloads/foo.zip[download foo.zip]
-- abs: http://google.cod[Google]
-- or my@email.com[email john]
linktext <- inlineListToAsciiDoc opts txt
let isRelative = ':' `notElem` src
let prefix = if isRelative
then text "link:"
else empty
let srcSuffix = fromMaybe src (stripPrefix "mailto:" src)
let useAuto = case txt of
[Str s] | escapeURI s == srcSuffix -> True
_ -> False
return $ if useAuto
then text srcSuffix
else prefix <> text src <> "[" <> linktext <> "]"
inlineToAsciiDoc opts (Image attr alternate (src, tit)) = do
-- image:images/logo.png[Company logo, title="blah"]
let txt = if (null alternate) || (alternate == [Str ""])
then [Str "image"]
else alternate
linktext <- inlineListToAsciiDoc opts txt
let linktitle = if null tit
then empty
else ",title=\"" <> text tit <> "\""
showDim dir = case (dimension dir attr) of
Just (Percent a) ->
["scaledwidth=" <> text (show (Percent a))]
Just dim ->
[text (show dir) <> "=" <> text (showInPixel opts dim)]
Nothing ->
[]
dimList = showDim Width ++ showDim Height
dims = if null dimList
then empty
else "," <> cat (intersperse "," dimList)
return $ "image:" <> text src <> "[" <> linktext <> linktitle <> dims <> "]"
inlineToAsciiDoc opts (Note [Para inlines]) =
inlineToAsciiDoc opts (Note [Plain inlines])
inlineToAsciiDoc opts (Note [Plain inlines]) = do
contents <- inlineListToAsciiDoc opts inlines
return $ text "footnote:[" <> contents <> "]"
-- asciidoc can't handle blank lines in notes
inlineToAsciiDoc _ (Note _) = return "[multiblock footnote omitted]"
inlineToAsciiDoc opts (Span (ident,_,_) ils) = do
let identifier = if (null ident) then empty else ("[[" <> text ident <> "]]")
contents <- inlineListToAsciiDoc opts ils
return $ identifier <> contents
|