542 lines
21 KiB
Haskell
542 lines
21 KiB
Haskell
{-
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Copyright (C) 2007-2015 John MacFarlane <jgm@berkeley.edu>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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-}
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{- |
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Module : Text.Pandoc.Writers.Ms
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Copyright : Copyright (C) 2007-2015 John MacFarlane
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License : GNU GPL, version 2 or above
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Maintainer : John MacFarlane <jgm@berkeley.edu>
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Stability : alpha
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Portability : portable
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Conversion of 'Pandoc' documents to groff ms format.
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TODO:
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[ ] for links, emails, consider using macros from www: man groff_www
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alo has a raw html macro and support for images.
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[ ] consider using a custom macro package for pandoc (perhaps if
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a variable is set?)
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[ ] is there a better way to do strikeout?
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[ ] options for hyperlink rendering (currently footnote)
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[ ] can we get prettier output using .B, etc. instead of
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the inline forms?
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[ ] tight/loose list distinction
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[ ] internal hyperlinks (this seems to be possible since
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they exist in the groff manual PDF version)
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[ ] better template, with configurable page number,
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columns, etc.
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[ ] support for images? gropdf (and maybe pdfroff) supports the tag
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\X'pdf: pdfpic file alignment width height line-length'
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and also seems to support bookmarks.
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note that in the groff_www macros, .PIMG allows a png to
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be specified and converts it automatically to eps for
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ps output
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NB. -U (unsafe mode) is needed for groff invocations if this
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functionality is used
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-}
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module Text.Pandoc.Writers.Ms ( writeMs ) where
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import Text.Pandoc.Definition
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import Text.Pandoc.Templates
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import Text.Pandoc.Shared
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import Text.Pandoc.Writers.Shared
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import Text.Pandoc.Options
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import Text.Pandoc.Writers.Math
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import Text.Printf ( printf )
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import qualified Data.Map as Map
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import Data.List ( stripPrefix, intersperse, intercalate, sort )
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import Data.Maybe (fromMaybe)
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import Text.Pandoc.Pretty
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import Text.Pandoc.Class (PandocMonad, report)
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import Text.Pandoc.ImageSize
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import Text.Pandoc.Logging
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import Control.Monad.State
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import Data.Char ( isLower, isUpper, toUpper )
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import Text.TeXMath (writeEqn)
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import System.FilePath (takeExtension)
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import Network.URI (isURI)
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data WriterState = WriterState { stHasInlineMath :: Bool
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, stFirstPara :: Bool
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, stNotes :: [Note]
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, stInNote :: Bool
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, stSmallCaps :: Bool
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, stFontFeatures :: Map.Map Char Bool
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}
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defaultWriterState :: WriterState
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defaultWriterState = WriterState{ stHasInlineMath = False
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, stFirstPara = True
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, stNotes = []
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, stInNote = False
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, stSmallCaps = False
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, stFontFeatures = Map.fromList [
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('I',False)
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, ('B',False)
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, ('C',False)
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]
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}
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type Note = [Block]
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type MS = StateT WriterState
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-- | Convert Pandoc to Ms.
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writeMs :: PandocMonad m => WriterOptions -> Pandoc -> m String
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writeMs opts document =
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evalStateT (pandocToMs opts document) defaultWriterState
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-- | Return groff ms representation of document.
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pandocToMs :: PandocMonad m => WriterOptions -> Pandoc -> MS m String
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pandocToMs opts (Pandoc meta blocks) = do
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let colwidth = if writerWrapText opts == WrapAuto
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then Just $ writerColumns opts
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else Nothing
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let render' = render colwidth
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metadata <- metaToJSON opts
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(fmap (render colwidth) . blockListToMs opts)
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(fmap (render colwidth) . inlineListToMs' opts)
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meta
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body <- blockListToMs opts blocks
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let main = render' body
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hasInlineMath <- gets stHasInlineMath
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let titleMeta = (escapeString . stringify) $ docTitle meta
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let authorsMeta = map (escapeString . stringify) $ docAuthors meta
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let context = defField "body" main
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$ defField "has-inline-math" hasInlineMath
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$ defField "hyphenate" True
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$ defField "pandoc-version" pandocVersion
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$ defField "toc" (writerTableOfContents opts)
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$ defField "title-meta" titleMeta
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$ defField "author-meta" (intercalate "; " authorsMeta)
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$ metadata
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case writerTemplate opts of
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Nothing -> return main
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Just tpl -> return $ renderTemplate' tpl context
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-- | Association list of characters to escape.
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msEscapes :: Map.Map Char String
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msEscapes = Map.fromList $
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[ ('\160', "\\ ")
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, ('\'', "\\[aq]")
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, ('’', "'")
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, ('"', "\\\"")
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, ('\x2014', "\\[em]")
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, ('\x2013', "\\[en]")
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, ('\x2026', "\\&...")
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, ('|', "\\[u007C]") -- because we use | for inline math
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, ('-', "\\-")
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, ('@', "\\@")
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, ('\\', "\\\\")
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]
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escapeChar :: Char -> String
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escapeChar c = case Map.lookup c msEscapes of
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Just s -> s
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Nothing -> [c]
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-- | Escape | character, used to mark inline math, inside math.
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escapeBar :: String -> String
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escapeBar = concatMap go
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where go '|' = "\\[u007C]"
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go c = [c]
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-- | Escape special characters for Ms.
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escapeString :: String -> String
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escapeString = concatMap escapeChar
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toSmallCaps :: String -> String
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toSmallCaps [] = []
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toSmallCaps (c:cs)
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| isLower c = let (lowers,rest) = span isLower (c:cs)
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in "\\s-2" ++ escapeString (map toUpper lowers) ++
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"\\s0" ++ toSmallCaps rest
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| isUpper c = let (uppers,rest) = span isUpper (c:cs)
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in escapeString uppers ++ toSmallCaps rest
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| otherwise = escapeChar c ++ toSmallCaps cs
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-- | Escape a literal (code) section for Ms.
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escapeCode :: String -> String
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escapeCode = concat . intersperse "\n" . map escapeLine . lines
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where escapeCodeChar ' ' = "\\ "
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escapeCodeChar '\t' = "\\\t"
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escapeCodeChar c = escapeChar c
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escapeLine codeline =
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case concatMap escapeCodeChar codeline of
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a@('.':_) -> "\\&" ++ a
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b -> b
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-- We split inline lists into sentences, and print one sentence per
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-- line. groff/troff treats the line-ending period differently.
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-- See http://code.google.com/p/pandoc/issues/detail?id=148.
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-- | Returns the first sentence in a list of inlines, and the rest.
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breakSentence :: [Inline] -> ([Inline], [Inline])
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breakSentence [] = ([],[])
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breakSentence xs =
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let isSentenceEndInline (Str ys@(_:_)) | last ys == '.' = True
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isSentenceEndInline (Str ys@(_:_)) | last ys == '?' = True
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isSentenceEndInline (LineBreak) = True
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isSentenceEndInline _ = False
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(as, bs) = break isSentenceEndInline xs
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in case bs of
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[] -> (as, [])
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[c] -> (as ++ [c], [])
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(c:Space:cs) -> (as ++ [c], cs)
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(c:SoftBreak:cs) -> (as ++ [c], cs)
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(Str ".":Str (')':ys):cs) -> (as ++ [Str ".", Str (')':ys)], cs)
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(x@(Str ('.':')':_)):cs) -> (as ++ [x], cs)
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(LineBreak:x@(Str ('.':_)):cs) -> (as ++[LineBreak], x:cs)
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(c:cs) -> (as ++ [c] ++ ds, es)
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where (ds, es) = breakSentence cs
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-- | Split a list of inlines into sentences.
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splitSentences :: [Inline] -> [[Inline]]
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splitSentences xs =
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let (sent, rest) = breakSentence xs
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in if null rest then [sent] else sent : splitSentences rest
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blockToMs :: PandocMonad m
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=> WriterOptions -- ^ Options
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-> Block -- ^ Block element
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-> MS m Doc
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blockToMs _ Null = return empty
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blockToMs opts (Div _ bs) = do
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setFirstPara
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res <- blockListToMs opts bs
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setFirstPara
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return res
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blockToMs opts (Plain inlines) =
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liftM vcat $ mapM (inlineListToMs' opts) $ splitSentences inlines
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blockToMs opts (Para [Image attr alt (src,_tit)])
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| let ext = takeExtension src in (ext == ".ps" || ext == ".eps") = do
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let (mbW,mbH) = (inPoints opts <$> dimension Width attr,
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inPoints opts <$> dimension Height attr)
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let sizeAttrs = case (mbW, mbH) of
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(Just wp, Nothing) -> space <> doubleQuotes
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(text (show (floor wp :: Int) ++ "p"))
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(Just wp, Just hp) -> space <> doubleQuotes
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(text (show (floor wp :: Int) ++ "p")) <>
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space <>
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doubleQuotes (text (show (floor hp :: Int)))
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_ -> empty
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capt <- inlineListToMs' opts alt
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return $ nowrap (text ".PSPIC -C " <>
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doubleQuotes (text (escapeString src)) <>
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sizeAttrs) $$
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text ".ce 1000" $$
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capt $$
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text ".ce 0"
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blockToMs opts (Para inlines) = do
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firstPara <- gets stFirstPara
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resetFirstPara
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contents <- liftM vcat $ mapM (inlineListToMs' opts) $
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splitSentences inlines
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return $ text (if firstPara then ".LP" else ".PP") $$ contents
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blockToMs _ b@(RawBlock f str)
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| f == Format "ms" = return $ text str
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| otherwise = do
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report $ BlockNotRendered b
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return empty
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blockToMs _ HorizontalRule = do
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resetFirstPara
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return $ text ".HLINE"
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blockToMs opts (Header level _ inlines) = do
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setFirstPara
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contents <- inlineListToMs' opts inlines
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let tocEntry = if writerTableOfContents opts &&
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level <= writerTOCDepth opts
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then text ".XS" $$
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(text (replicate level '\t') <> contents) $$
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text ".XE"
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else empty
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let heading = if writerNumberSections opts
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then ".NH"
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else ".SH"
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modify $ \st -> st{ stFirstPara = True }
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return $ text heading <> space <> text (show level) $$ contents $$ tocEntry
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blockToMs _ (CodeBlock _ str) = do
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setFirstPara
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return $
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text ".IP" $$
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text ".nf" $$
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text "\\f[C]" $$
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text (escapeCode str) $$
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text "\\f[]" $$
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text ".fi"
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blockToMs opts (LineBlock ls) = do
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resetFirstPara
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blockToMs opts $ Para $ intercalate [LineBreak] ls
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blockToMs opts (BlockQuote blocks) = do
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setFirstPara
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contents <- blockListToMs opts blocks
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setFirstPara
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return $ text ".RS" $$ contents $$ text ".RE"
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blockToMs opts (Table caption alignments widths headers rows) =
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let aligncode AlignLeft = "l"
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aligncode AlignRight = "r"
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aligncode AlignCenter = "c"
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aligncode AlignDefault = "l"
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in do
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caption' <- inlineListToMs' opts caption
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let iwidths = if all (== 0) widths
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then repeat ""
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else map (printf "w(%0.1fn)" . (70 *)) widths
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-- 78n default width - 8n indent = 70n
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let coldescriptions = text $ intercalate " "
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(zipWith (\align width -> aligncode align ++ width)
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alignments iwidths) ++ "."
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colheadings <- mapM (blockListToMs opts) headers
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let makeRow cols = text "T{" $$
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(vcat $ intersperse (text "T}@T{") cols) $$
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text "T}"
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let colheadings' = if all null headers
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then empty
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else makeRow colheadings $$ char '_'
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body <- mapM (\row -> do
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cols <- mapM (blockListToMs opts) row
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return $ makeRow cols) rows
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setFirstPara
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return $ text ".PP" $$ caption' $$
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text ".TS" $$ text "tab(@);" $$ coldescriptions $$
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colheadings' $$ vcat body $$ text ".TE"
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blockToMs opts (BulletList items) = do
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contents <- mapM (bulletListItemToMs opts) items
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setFirstPara
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return (vcat contents)
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blockToMs opts (OrderedList attribs items) = do
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let markers = take (length items) $ orderedListMarkers attribs
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let indent = 1 + (maximum $ map length markers)
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contents <- mapM (\(num, item) -> orderedListItemToMs opts num indent item) $
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zip markers items
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setFirstPara
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return (vcat contents)
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blockToMs opts (DefinitionList items) = do
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contents <- mapM (definitionListItemToMs opts) items
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setFirstPara
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return (vcat contents)
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-- | Convert bullet list item (list of blocks) to ms.
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bulletListItemToMs :: PandocMonad m => WriterOptions -> [Block] -> MS m Doc
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bulletListItemToMs _ [] = return empty
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bulletListItemToMs opts ((Para first):rest) =
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bulletListItemToMs opts ((Plain first):rest)
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bulletListItemToMs opts ((Plain first):rest) = do
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first' <- blockToMs opts (Plain first)
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rest' <- blockListToMs opts rest
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let first'' = text ".IP \\[bu] 2" $$ first'
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let rest'' = if null rest
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then empty
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else text ".RS 2" $$ rest' $$ text ".RE"
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return (first'' $$ rest'')
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bulletListItemToMs opts (first:rest) = do
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first' <- blockToMs opts first
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rest' <- blockListToMs opts rest
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return $ text "\\[bu] .RS 2" $$ first' $$ rest' $$ text ".RE"
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-- | Convert ordered list item (a list of blocks) to ms.
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orderedListItemToMs :: PandocMonad m
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=> WriterOptions -- ^ options
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-> String -- ^ order marker for list item
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-> Int -- ^ number of spaces to indent
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-> [Block] -- ^ list item (list of blocks)
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-> MS m Doc
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orderedListItemToMs _ _ _ [] = return empty
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orderedListItemToMs opts num indent ((Para first):rest) =
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orderedListItemToMs opts num indent ((Plain first):rest)
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orderedListItemToMs opts num indent (first:rest) = do
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first' <- blockToMs opts first
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rest' <- blockListToMs opts rest
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let num' = printf ("%" ++ show (indent - 1) ++ "s") num
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let first'' = text (".IP \"" ++ num' ++ "\" " ++ show indent) $$ first'
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let rest'' = if null rest
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then empty
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else text ".RS 4" $$ rest' $$ text ".RE"
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return $ first'' $$ rest''
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-- | Convert definition list item (label, list of blocks) to ms.
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definitionListItemToMs :: PandocMonad m
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=> WriterOptions
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-> ([Inline],[[Block]])
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-> MS m Doc
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definitionListItemToMs opts (label, defs) = do
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labelText <- inlineListToMs' opts label
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contents <- if null defs
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then return empty
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else liftM vcat $ forM defs $ \blocks -> do
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let (first, rest) = case blocks of
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((Para x):y) -> (Plain x,y)
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(x:y) -> (x,y)
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[] -> error "blocks is null"
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rest' <- liftM vcat $
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mapM (\item -> blockToMs opts item) rest
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first' <- blockToMs opts first
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return $ first' $$ text ".RS" $$ rest' $$ text ".RE"
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return $ nowrap (text ".IP " <> doubleQuotes labelText) $$ contents
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-- | Convert list of Pandoc block elements to ms.
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blockListToMs :: PandocMonad m
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=> WriterOptions -- ^ Options
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-> [Block] -- ^ List of block elements
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-> MS m Doc
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blockListToMs opts blocks =
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mapM (blockToMs opts) blocks >>= (return . vcat)
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-- | Convert list of Pandoc inline elements to ms.
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inlineListToMs :: PandocMonad m => WriterOptions -> [Inline] -> MS m Doc
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-- if list starts with ., insert a zero-width character \& so it
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-- won't be interpreted as markup if it falls at the beginning of a line.
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inlineListToMs opts lst@(Str ('.':_) : _) = mapM (inlineToMs opts) lst >>=
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(return . (text "\\&" <>) . hcat)
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inlineListToMs opts lst = hcat <$> mapM (inlineToMs opts) lst
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-- This version to be used when there is no further inline content;
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-- forces a note at the end.
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inlineListToMs' :: PandocMonad m => WriterOptions -> [Inline] -> MS m Doc
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inlineListToMs' opts lst = do
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x <- hcat <$> mapM (inlineToMs opts) lst
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y <- handleNotes opts empty
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return $ x <> y
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-- | Convert Pandoc inline element to ms.
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inlineToMs :: PandocMonad m => WriterOptions -> Inline -> MS m Doc
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inlineToMs opts (Span _ ils) = inlineListToMs opts ils
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inlineToMs opts (Emph lst) =
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withFontFeature 'I' (inlineListToMs opts lst)
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inlineToMs opts (Strong lst) =
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withFontFeature 'B' (inlineListToMs opts lst)
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inlineToMs opts (Strikeout lst) = do
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contents <- inlineListToMs opts lst
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return $ text "[STRIKEOUT:" <> contents <> char ']'
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inlineToMs opts (Superscript lst) = do
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contents <- inlineListToMs opts lst
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return $ text "\\*{" <> contents <> text "\\*}"
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inlineToMs opts (Subscript lst) = do
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contents <- inlineListToMs opts lst
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return $ text "\\*<" <> contents <> text "\\*>"
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inlineToMs opts (SmallCaps lst) = do
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-- see https://lists.gnu.org/archive/html/groff/2015-01/msg00016.html
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modify $ \st -> st{ stSmallCaps = not (stSmallCaps st) }
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res <- inlineListToMs opts lst
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modify $ \st -> st{ stSmallCaps = not (stSmallCaps st) }
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return res
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inlineToMs opts (Quoted SingleQuote lst) = do
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contents <- inlineListToMs opts lst
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return $ char '`' <> contents <> char '\''
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inlineToMs opts (Quoted DoubleQuote lst) = do
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contents <- inlineListToMs opts lst
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return $ text "\\[lq]" <> contents <> text "\\[rq]"
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inlineToMs opts (Cite _ lst) =
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inlineListToMs opts lst
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inlineToMs _ (Code _ str) =
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withFontFeature 'C' (return $ text $ escapeCode str)
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inlineToMs _ (Str str) = do
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smallcaps <- gets stSmallCaps
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if smallcaps
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then return $ text $ toSmallCaps str
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else return $ text $ escapeString str
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inlineToMs opts (Math InlineMath str) = do
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modify $ \st -> st{ stHasInlineMath = True }
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res <- convertMath writeEqn InlineMath str
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case res of
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Left il -> inlineToMs opts il
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Right r -> return $ text "|" <> text (escapeBar r) <> text "|"
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inlineToMs opts (Math DisplayMath str) = do
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res <- convertMath writeEqn InlineMath str
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case res of
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Left il -> do
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contents <- inlineToMs opts il
|
||
return $ cr <> text ".RS" $$ contents $$ text ".RE"
|
||
Right r -> return $
|
||
cr <> text ".EQ" $$ text (escapeBar r) $$ text ".EN"
|
||
inlineToMs _ il@(RawInline f str)
|
||
| f == Format "ms" = return $ text str
|
||
| otherwise = do
|
||
report $ InlineNotRendered il
|
||
return empty
|
||
inlineToMs _ (LineBreak) = return $ cr <> text ".br" <> cr
|
||
inlineToMs opts SoftBreak = handleNotes opts cr
|
||
inlineToMs opts Space = handleNotes opts space
|
||
inlineToMs opts (Link _ txt (src, _)) = do
|
||
let srcSuffix = fromMaybe src (stripPrefix "mailto:" src)
|
||
inNote <- gets stInNote
|
||
case txt of
|
||
[Str s]
|
||
| escapeURI s == srcSuffix ->
|
||
return $ text (escapeString srcSuffix)
|
||
_ | not (isURI src) -> inlineListToMs opts txt
|
||
| inNote -> do
|
||
-- avoid a note in a note!
|
||
contents <- inlineListToMs opts txt
|
||
return $ contents <> space <> char '(' <>
|
||
text (escapeString src) <> char ')'
|
||
| otherwise -> do
|
||
let linknote = [Plain [Str src]]
|
||
inlineListToMs opts (txt ++ [Note linknote])
|
||
inlineToMs opts (Image attr alternate (source, tit)) = do
|
||
let alt = if null alternate then [Str "image"] else alternate
|
||
linkPart <- inlineToMs opts (Link attr alt (source, tit))
|
||
return $ char '[' <> text "IMAGE: " <> linkPart <> char ']'
|
||
inlineToMs _ (Note contents) = do
|
||
modify $ \st -> st{ stNotes = contents : stNotes st }
|
||
return $ text "\\**"
|
||
|
||
handleNotes :: PandocMonad m => WriterOptions -> Doc -> MS m Doc
|
||
handleNotes opts fallback = do
|
||
notes <- gets stNotes
|
||
if null notes
|
||
then return fallback
|
||
else do
|
||
modify $ \st -> st{ stNotes = [], stInNote = True }
|
||
res <- vcat <$> mapM (handleNote opts) notes
|
||
modify $ \st -> st{ stInNote = False }
|
||
return res
|
||
|
||
handleNote :: PandocMonad m => WriterOptions -> Note -> MS m Doc
|
||
handleNote opts bs = do
|
||
-- don't start with Paragraph or we'll get a spurious blank
|
||
-- line after the note ref:
|
||
let bs' = case bs of
|
||
(Para ils : rest) -> Plain ils : rest
|
||
_ -> bs
|
||
contents <- blockListToMs opts bs'
|
||
return $ cr <> text ".FS" $$ contents $$ text ".FE" <> cr
|
||
|
||
fontChange :: PandocMonad m => MS m Doc
|
||
fontChange = do
|
||
features <- gets stFontFeatures
|
||
let filling = sort [c | (c,True) <- Map.toList features]
|
||
return $ text $ "\\f[" ++ filling ++ "]"
|
||
|
||
withFontFeature :: PandocMonad m => Char -> MS m Doc -> MS m Doc
|
||
withFontFeature c action = do
|
||
modify $ \st -> st{ stFontFeatures = Map.adjust not c $ stFontFeatures st }
|
||
begin <- fontChange
|
||
d <- action
|
||
modify $ \st -> st{ stFontFeatures = Map.adjust not c $ stFontFeatures st }
|
||
end <- fontChange
|
||
return $ begin <> d <> end
|
||
|
||
setFirstPara :: PandocMonad m => MS m ()
|
||
setFirstPara = modify $ \st -> st{ stFirstPara = True }
|
||
|
||
resetFirstPara :: PandocMonad m => MS m ()
|
||
resetFirstPara = modify $ \st -> st{ stFirstPara = False }
|