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-rw-r--r--src/Text/Pandoc/Writers/Man.hs263
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+{-
+Copyright (C) 2006 John MacFarlane <jgm at berkeley dot 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.Man
+ Copyright : Copyright (C) 2006 John MacFarlane
+ License : GNU GPL, version 2 or above
+
+ Maintainer : John MacFarlane <jgm at berkeley dot edu>
+ Stability : alpha
+ Portability : portable
+
+Conversion of 'Pandoc' documents to groff man page format.
+
+-}
+module Text.Pandoc.Writers.Man (
+ writeMan
+ ) where
+import Text.Pandoc.Definition
+import Text.Pandoc.Shared
+import Data.Char ( toUpper )
+import Data.List ( group, isPrefixOf, drop, find )
+import Text.PrettyPrint.HughesPJ hiding ( Str )
+import Control.Monad.State
+
+type Notes = [[Block]]
+type WriterState = Notes
+
+-- | Convert Pandoc to Man.
+writeMan :: WriterOptions -> Pandoc -> String
+writeMan opts document =
+ render $ evalState (pandocToMan opts document) []
+
+-- | Return groff man representation of document.
+pandocToMan :: WriterOptions -> Pandoc -> State WriterState Doc
+pandocToMan opts (Pandoc meta blocks) = do
+ let before = writerIncludeBefore opts
+ let after = writerIncludeAfter opts
+ before' = if null before then empty else text before
+ after' = if null after then empty else text after
+ (head, foot) <- metaToMan opts meta
+ body <- blockListToMan opts blocks
+ notes <- get
+ notes' <- notesToMan opts (reverse notes)
+ return $ head $$ before' $$ body $$ notes' $$ foot $$ after'
+
+-- | Insert bibliographic information into Man header and footer.
+metaToMan :: WriterOptions -- ^ Options, including Man header
+ -> Meta -- ^ Meta with bibliographic information
+ -> State WriterState (Doc, Doc)
+metaToMan options (Meta title authors date) = do
+ title' <- inlineListToMan options title
+ let head = (text ".TH \"") <> title' <> text ("\" 1 \"" ++ date ++
+ "\" \"") <> title' <> text ("\" \"User Manuals\"")
+ let foot = case length authors of
+ 0 -> text $ ""
+ 1 -> text $ ".SH AUTHOR\n" ++ joinWithSep "\n" authors
+ 2 -> text $ ".SH AUTHORS\n" ++ joinWithSep "\n" authors
+ return $ if writerStandalone options
+ then (head, foot)
+ else (empty, empty)
+
+-- | Return man representation of notes.
+notesToMan :: WriterOptions -> [[Block]] -> State WriterState Doc
+notesToMan opts notes =
+ if null notes
+ then return empty
+ else mapM (\(num, note) -> noteToMan opts num note) (zip [1..] notes) >>=
+ (return . (text ".SH NOTES\n" <>) . vcat)
+
+-- | Return man representation of a note.
+noteToMan :: WriterOptions -> Int -> [Block] -> State WriterState Doc
+noteToMan opts num note = do
+ contents <- blockListToMan opts note
+ let marker = text "\n.SS [" <> text (show num) <> text "]"
+ return $ marker $$ contents
+
+wrappedMan :: WriterOptions -> [Inline] -> State WriterState Doc
+wrappedMan opts sect = do
+ let chunks = splitBy Space sect
+ chunks' <- mapM (inlineListToMan opts) chunks
+ return $ fsep chunks'
+
+-- | Escape nonbreaking space as \
+escapeNbsp "" = ""
+escapeNbsp ('\160':xs) = "\\ " ++ escapeNbsp xs
+escapeNbsp str =
+ let (a,b) = break (=='\160') str in
+ a ++ escapeNbsp b
+
+-- | Escape special characters for Man.
+escapeString :: String -> String
+escapeString = escapeNbsp . backslashEscape "-\\"
+
+-- | Escape a literal (code) section for Man.
+escapeCode :: String -> String
+escapeCode = backslashEscape "-\\\t "
+
+-- | Convert Pandoc block element to man.
+blockToMan :: WriterOptions -- ^ Options
+ -> Block -- ^ Block element
+ -> State WriterState Doc
+blockToMan opts Null = return empty
+blockToMan opts (Plain inlines) = wrappedMan opts inlines
+blockToMan opts (Para inlines) = do
+ contents <- wrappedMan opts inlines
+ return $ text "\n.PP" $$ contents
+blockToMan opts (RawHtml str) = return $ text str
+blockToMan opts HorizontalRule = return $ text $ "\n.PP\n" ++ " * * * * *"
+blockToMan opts (Header level inlines) = do
+ contents <- inlineListToMan opts inlines
+ let heading = case level of
+ 1 -> "\n.SH "
+ _ -> "\n.SS "
+ return $ text heading <> contents
+blockToMan opts (CodeBlock str) = return $
+ text "\n\\f[B]" $$ text ((unlines . map (" " ++) . lines) (escapeCode str)) <>
+ text "\\f[]"
+blockToMan opts (BlockQuote blocks) = do
+ contents <- blockListToMan opts blocks
+ return $ text "\n.RS" $$ contents $$ text "\n.RE"
+blockToMan opts (Table caption _ _ headers rows) = blockToMan opts
+ (Para [Str "pandoc: TABLE unsupported in Man writer"])
+
+blockToMan opts (BulletList items) = do
+ contents <- mapM (bulletListItemToMan opts) items
+ return (vcat contents)
+blockToMan opts (OrderedList items) = do
+ contents <- mapM (\(item, num) -> orderedListItemToMan opts item num) $
+ zip [1..] items
+ return (vcat contents)
+blockToMan opts (DefinitionList items) = do
+ contents <- mapM (definitionListItemToMan opts) items
+ return (vcat contents)
+
+-- | Convert bullet list item (list of blocks) to man.
+bulletListItemToMan :: WriterOptions -> [Block] -> State WriterState Doc
+bulletListItemToMan opts [] = return empty
+bulletListItemToMan opts ((Para first):rest) =
+ bulletListItemToMan opts ((Plain first):rest)
+bulletListItemToMan opts ((Plain first):rest) = do
+ first' <- blockToMan opts (Plain first)
+ rest' <- blockListToMan opts rest
+ let first'' = text "\n.IP \\[bu] 2" $$ first'
+ let rest'' = if null rest
+ then empty
+ else text "\n.RS 2" $$ rest' $$ text "\n.RE"
+ return (first'' $$ rest'')
+bulletListItemToMan opts (first:rest) = do
+ first' <- blockToMan opts first
+ rest' <- blockListToMan opts rest
+ return $ text "\n\\[bu] \n.RS 2" $$ first' $$ rest' $$ text "\n.RE"
+
+-- | Convert ordered list item (a list of blocks) to man.
+orderedListItemToMan :: WriterOptions -- ^ options
+ -> Int -- ^ ordinal number of list item
+ -> [Block] -- ^ list item (list of blocks)
+ -> State WriterState Doc
+orderedListItemToMan _ _ [] = return empty
+orderedListItemToMan opts num ((Para first):rest) =
+ orderedListItemToMan opts num ((Plain first):rest)
+orderedListItemToMan opts num ((Plain first):rest) = do
+ first' <- blockToMan opts (Plain first)
+ rest' <- blockListToMan opts rest
+ let first'' = text ("\n.IP " ++ show num ++ "." ++ " 4") $$ first'
+ let rest'' = if null rest
+ then text "\n"
+ else text "\n.RS 4" $$ rest' $$ text "\n.RE"
+ return (first'' $$ rest'')
+orderedListItemToMan opts num (first:rest) = do
+ first' <- blockToMan opts first
+ rest' <- blockListToMan opts rest
+ return $ text ("\n.IP " ++ show num ++ "." ++ " 4") $$ first' $$
+ rest' $$ text "\n.RE"
+
+-- | Convert definition list item (label, list of blocks) to man.
+definitionListItemToMan :: WriterOptions
+ -> ([Inline],[Block])
+ -> State WriterState Doc
+definitionListItemToMan opts (label, items) = do
+ labelText <- inlineListToMan opts label
+ contents <- if null items
+ then return empty
+ else do
+ let (first, rest) = case items of
+ ((Para x):y) -> (Plain x,y)
+ (x:y) -> (x,y)
+ rest' <- mapM (\item -> blockToMan opts item)
+ rest >>= (return . vcat)
+ first' <- blockToMan opts first
+ return $ first' $$ text "\n.RS" $$ rest' $$ text "\n.RE"
+ return $ text "\n.TP\n.B " <> labelText $+$ contents
+
+-- | Convert list of Pandoc block elements to man.
+blockListToMan :: WriterOptions -- ^ Options
+ -> [Block] -- ^ List of block elements
+ -> State WriterState Doc
+blockListToMan opts blocks =
+ mapM (blockToMan opts) blocks >>= (return . vcat)
+
+-- | Convert list of Pandoc inline elements to man.
+inlineListToMan :: WriterOptions -> [Inline] -> State WriterState Doc
+inlineListToMan opts lst = mapM (inlineToMan opts) lst >>= (return . hcat)
+
+-- | Convert Pandoc inline element to man.
+inlineToMan :: WriterOptions -> Inline -> State WriterState Doc
+inlineToMan opts (Emph lst) = do
+ contents <- inlineListToMan opts lst
+ return $ text "\\f[I]" <> contents <> text "\\f[]"
+inlineToMan opts (Strong lst) = do
+ contents <- inlineListToMan opts lst
+ return $ text "\\f[B]" <> contents <> text "\\f[]"
+inlineToMan opts (Quoted SingleQuote lst) = do
+ contents <- inlineListToMan opts lst
+ return $ char '`' <> contents <> char '\''
+inlineToMan opts (Quoted DoubleQuote lst) = do
+ contents <- inlineListToMan opts lst
+ return $ text "\\[lq]" <> contents <> text "\\[rq]"
+inlineToMan opts EmDash = return $ text "\\[em]"
+inlineToMan opts EnDash = return $ text "\\[en]"
+inlineToMan opts Apostrophe = return $ char '\''
+inlineToMan opts Ellipses = return $ text "\\&..."
+inlineToMan opts (Code str) =
+ return $ text $ "\\f[B]" ++ escapeCode str ++ "\\f[]"
+inlineToMan opts (Str str) = return $ text $ escapeString str
+inlineToMan opts (TeX str) = return $ text $ escapeCode str
+inlineToMan opts (HtmlInline str) = return $ text $ escapeCode str
+inlineToMan opts (LineBreak) = return $ text "\n.P\n"
+inlineToMan opts Space = return $ char ' '
+inlineToMan opts (Link txt (src, _)) = do
+ linktext <- inlineListToMan opts txt
+ let srcSuffix = if isPrefixOf "mailto:" src then drop 7 src else src
+ return $ if txt == [Str srcSuffix]
+ then char '<' <> text srcSuffix <> char '>'
+ else linktext <> text " (" <> text src <> char ')'
+inlineToMan opts (Image alternate (source, tit)) = do
+ let txt = if (null alternate) || (alternate == [Str ""]) ||
+ (alternate == [Str source]) -- to prevent autolinks
+ then [Str "image"]
+ else alternate
+ linkPart <- inlineToMan opts (Link txt (source, tit))
+ return $ char '[' <> text "IMAGE: " <> linkPart <> char ']'
+inlineToMan opts (Note contents) = do
+ modify (\notes -> contents:notes) -- add to notes in state
+ notes <- get
+ let ref = show $ (length notes)
+ return $ text "[^" <> text ref <> char ']'
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 14:11:42 +0000