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-{-
-Copyright (C) 2007-2015 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.Man
- Copyright : Copyright (C) 2007-2015 John MacFarlane
- License : GNU GPL, version 2 or above
-
- Maintainer : John MacFarlane <jgm@berkeley.edu>
- Stability : alpha
- Portability : portable
-
-Conversion of 'Pandoc' documents to groff man page format.
-
--}
-module Text.Pandoc.Writers.Man ( writeMan) where
-import Text.Pandoc.Definition
-import Text.Pandoc.Templates
-import Text.Pandoc.Shared
-import Text.Pandoc.Writers.Shared
-import Text.Pandoc.Options
-import Text.Pandoc.Writers.Math
-import Text.Printf ( printf )
-import Data.List ( stripPrefix, intersperse, intercalate )
-import Data.Maybe (fromMaybe)
-import Text.Pandoc.Pretty
-import Text.Pandoc.Builder (deleteMeta)
-import Control.Monad.State
-import Text.Pandoc.Error
-import Control.Monad.Except (throwError)
-import Text.Pandoc.Class (PandocMonad, report)
-import Text.Pandoc.Logging
-
-type Notes = [[Block]]
-data WriterState = WriterState { stNotes :: Notes
- , stHasTables :: Bool }
-
--- | Convert Pandoc to Man.
-writeMan :: PandocMonad m => WriterOptions -> Pandoc -> m String
-writeMan opts document = evalStateT (pandocToMan opts document) (WriterState [] False)
-
--- | Return groff man representation of document.
-pandocToMan :: PandocMonad m => WriterOptions -> Pandoc -> StateT WriterState m String
-pandocToMan opts (Pandoc meta blocks) = do
- let colwidth = if writerWrapText opts == WrapAuto
- then Just $ writerColumns opts
- else Nothing
- let render' = render colwidth
- titleText <- inlineListToMan opts $ docTitle meta
- let title' = render' titleText
- let setFieldsFromTitle =
- case break (== ' ') title' of
- (cmdName, rest) -> case break (=='(') cmdName of
- (xs, '(':ys) | not (null ys) &&
- last ys == ')' ->
- defField "title" xs .
- defField "section" (init ys) .
- case splitBy (=='|') rest of
- (ft:hds) ->
- defField "footer" (trim ft) .
- defField "header"
- (trim $ concat hds)
- [] -> id
- _ -> defField "title" title'
- metadata <- metaToJSON opts
- (fmap (render colwidth) . blockListToMan opts)
- (fmap (render colwidth) . inlineListToMan opts)
- $ deleteMeta "title" meta
- body <- blockListToMan opts blocks
- notes <- liftM stNotes get
- notes' <- notesToMan opts (reverse notes)
- let main = render' $ body $$ notes' $$ text ""
- hasTables <- liftM stHasTables get
- let context = defField "body" main
- $ setFieldsFromTitle
- $ defField "has-tables" hasTables
- $ defField "hyphenate" True
- $ defField "pandoc-version" pandocVersion
- $ metadata
- case writerTemplate opts of
- Nothing -> return main
- Just tpl -> return $ renderTemplate' tpl context
-
--- | Return man representation of notes.
-notesToMan :: PandocMonad m => WriterOptions -> [[Block]] -> StateT WriterState m 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" $$) . vcat
-
--- | Return man representation of a note.
-noteToMan :: PandocMonad m => WriterOptions -> Int -> [Block] -> StateT WriterState m Doc
-noteToMan opts num note = do
- contents <- blockListToMan opts note
- let marker = cr <> text ".SS " <> brackets (text (show num))
- return $ marker $$ contents
-
--- | Association list of characters to escape.
-manEscapes :: [(Char, String)]
-manEscapes = [ ('\160', "\\ ")
- , ('\'', "\\[aq]")
- , ('’', "'")
- , ('\x2014', "\\[em]")
- , ('\x2013', "\\[en]")
- , ('\x2026', "\\&...")
- ] ++ backslashEscapes "-@\\"
-
--- | Escape special characters for Man.
-escapeString :: String -> String
-escapeString = escapeStringUsing manEscapes
-
--- | Escape a literal (code) section for Man.
-escapeCode :: String -> String
-escapeCode = concat . intersperse "\n" . map escapeLine . lines where
- escapeLine codeline =
- case escapeStringUsing (manEscapes ++ backslashEscapes "\t ") codeline of
- a@('.':_) -> "\\&" ++ a
- b -> b
-
--- We split inline lists into sentences, and print one sentence per
--- line. groff/troff treats the line-ending period differently.
--- See http://code.google.com/p/pandoc/issues/detail?id=148.
-
--- | Returns the first sentence in a list of inlines, and the rest.
-breakSentence :: [Inline] -> ([Inline], [Inline])
-breakSentence [] = ([],[])
-breakSentence xs =
- let isSentenceEndInline (Str ys@(_:_)) | last ys == '.' = True
- isSentenceEndInline (Str ys@(_:_)) | last ys == '?' = True
- isSentenceEndInline (LineBreak) = True
- isSentenceEndInline _ = False
- (as, bs) = break isSentenceEndInline xs
- in case bs of
- [] -> (as, [])
- [c] -> (as ++ [c], [])
- (c:Space:cs) -> (as ++ [c], cs)
- (c:SoftBreak:cs) -> (as ++ [c], cs)
- (Str ".":Str (')':ys):cs) -> (as ++ [Str ".", Str (')':ys)], cs)
- (x@(Str ('.':')':_)):cs) -> (as ++ [x], cs)
- (LineBreak:x@(Str ('.':_)):cs) -> (as ++[LineBreak], x:cs)
- (c:cs) -> (as ++ [c] ++ ds, es)
- where (ds, es) = breakSentence cs
-
--- | Split a list of inlines into sentences.
-splitSentences :: [Inline] -> [[Inline]]
-splitSentences xs =
- let (sent, rest) = breakSentence xs
- in if null rest then [sent] else sent : splitSentences rest
-
--- | Convert Pandoc block element to man.
-blockToMan :: PandocMonad m
- => WriterOptions -- ^ Options
- -> Block -- ^ Block element
- -> StateT WriterState m Doc
-blockToMan _ Null = return empty
-blockToMan opts (Div _ bs) = blockListToMan opts bs
-blockToMan opts (Plain inlines) =
- liftM vcat $ mapM (inlineListToMan opts) $ splitSentences inlines
-blockToMan opts (Para inlines) = do
- contents <- liftM vcat $ mapM (inlineListToMan opts) $
- splitSentences inlines
- return $ text ".PP" $$ contents
-blockToMan opts (LineBlock lns) =
- blockToMan opts $ linesToPara lns
-blockToMan _ b@(RawBlock f str)
- | f == Format "man" = return $ text str
- | otherwise = do
- report $ BlockNotRendered b
- return empty
-blockToMan _ HorizontalRule = return $ text ".PP" $$ text " * * * * *"
-blockToMan opts (Header level _ inlines) = do
- contents <- inlineListToMan opts inlines
- let heading = case level of
- 1 -> ".SH "
- _ -> ".SS "
- return $ text heading <> contents
-blockToMan _ (CodeBlock _ str) = return $
- text ".IP" $$
- text ".nf" $$
- text "\\f[C]" $$
- text (escapeCode str) $$
- text "\\f[]" $$
- text ".fi"
-blockToMan opts (BlockQuote blocks) = do
- contents <- blockListToMan opts blocks
- return $ text ".RS" $$ contents $$ text ".RE"
-blockToMan opts (Table caption alignments widths headers rows) =
- let aligncode AlignLeft = "l"
- aligncode AlignRight = "r"
- aligncode AlignCenter = "c"
- aligncode AlignDefault = "l"
- in do
- caption' <- inlineListToMan opts caption
- modify $ \st -> st{ stHasTables = True }
- let iwidths = if all (== 0) widths
- then repeat ""
- else map (printf "w(%0.1fn)" . (70 *)) widths
- -- 78n default width - 8n indent = 70n
- let coldescriptions = text $ intercalate " "
- (zipWith (\align width -> aligncode align ++ width)
- alignments iwidths) ++ "."
- colheadings <- mapM (blockListToMan opts) headers
- let makeRow cols = text "T{" $$
- (vcat $ intersperse (text "T}@T{") cols) $$
- text "T}"
- let colheadings' = if all null headers
- then empty
- else makeRow colheadings $$ char '_'
- body <- mapM (\row -> do
- cols <- mapM (blockListToMan opts) row
- return $ makeRow cols) rows
- return $ text ".PP" $$ caption' $$
- text ".TS" $$ text "tab(@);" $$ coldescriptions $$
- colheadings' $$ vcat body $$ text ".TE"
-
-blockToMan opts (BulletList items) = do
- contents <- mapM (bulletListItemToMan opts) items
- return (vcat contents)
-blockToMan opts (OrderedList attribs items) = do
- let markers = take (length items) $ orderedListMarkers attribs
- let indent = 1 + (maximum $ map length markers)
- contents <- mapM (\(num, item) -> orderedListItemToMan opts num indent item) $
- zip markers 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 :: PandocMonad m => WriterOptions -> [Block] -> StateT WriterState m Doc
-bulletListItemToMan _ [] = 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 ".IP \\[bu] 2" $$ first'
- let rest'' = if null rest
- then empty
- else text ".RS 2" $$ rest' $$ text ".RE"
- return (first'' $$ rest'')
-bulletListItemToMan opts (first:rest) = do
- first' <- blockToMan opts first
- rest' <- blockListToMan opts rest
- return $ text "\\[bu] .RS 2" $$ first' $$ rest' $$ text ".RE"
-
--- | Convert ordered list item (a list of blocks) to man.
-orderedListItemToMan :: PandocMonad m
- => WriterOptions -- ^ options
- -> String -- ^ order marker for list item
- -> Int -- ^ number of spaces to indent
- -> [Block] -- ^ list item (list of blocks)
- -> StateT WriterState m Doc
-orderedListItemToMan _ _ _ [] = return empty
-orderedListItemToMan opts num indent ((Para first):rest) =
- orderedListItemToMan opts num indent ((Plain first):rest)
-orderedListItemToMan opts num indent (first:rest) = do
- first' <- blockToMan opts first
- rest' <- blockListToMan opts rest
- let num' = printf ("%" ++ show (indent - 1) ++ "s") num
- let first'' = text (".IP \"" ++ num' ++ "\" " ++ show indent) $$ first'
- let rest'' = if null rest
- then empty
- else text ".RS 4" $$ rest' $$ text ".RE"
- return $ first'' $$ rest''
-
--- | Convert definition list item (label, list of blocks) to man.
-definitionListItemToMan :: PandocMonad m
- => WriterOptions
- -> ([Inline],[[Block]])
- -> StateT WriterState m Doc
-definitionListItemToMan opts (label, defs) = do
- labelText <- inlineListToMan opts label
- contents <- if null defs
- then return empty
- else liftM vcat $ forM defs $ \blocks -> do
- (first, rest) <- case blocks of
- ((Para x):y) -> return (Plain x,y)
- (x:y) -> return (x,y)
- [] -> throwError $ PandocSomeError "blocks is null"
- rest' <- liftM vcat $
- mapM (\item -> blockToMan opts item) rest
- first' <- blockToMan opts first
- return $ first' $$ text ".RS" $$ rest' $$ text ".RE"
- return $ text ".TP" $$ nowrap (text ".B " <> labelText) $$ contents
-
--- | Convert list of Pandoc block elements to man.
-blockListToMan :: PandocMonad m
- => WriterOptions -- ^ Options
- -> [Block] -- ^ List of block elements
- -> StateT WriterState m Doc
-blockListToMan opts blocks =
- mapM (blockToMan opts) blocks >>= (return . vcat)
-
--- | Convert list of Pandoc inline elements to man.
-inlineListToMan :: PandocMonad m => WriterOptions -> [Inline] -> StateT WriterState m Doc
-inlineListToMan opts lst = mapM (inlineToMan opts) lst >>= (return . hcat)
-
--- | Convert Pandoc inline element to man.
-inlineToMan :: PandocMonad m => WriterOptions -> Inline -> StateT WriterState m Doc
-inlineToMan opts (Span _ ils) = inlineListToMan opts ils
-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 (Strikeout lst) = do
- contents <- inlineListToMan opts lst
- return $ text "[STRIKEOUT:" <> contents <> char ']'
-inlineToMan opts (Superscript lst) = do
- contents <- inlineListToMan opts lst
- return $ char '^' <> contents <> char '^'
-inlineToMan opts (Subscript lst) = do
- contents <- inlineListToMan opts lst
- return $ char '~' <> contents <> char '~'
-inlineToMan opts (SmallCaps lst) = inlineListToMan opts lst -- not supported
-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 (Cite _ lst) =
- inlineListToMan opts lst
-inlineToMan _ (Code _ str) =
- return $ text $ "\\f[C]" ++ escapeCode str ++ "\\f[]"
-inlineToMan _ (Str str@('.':_)) =
- return $ afterBreak "\\&" <> text (escapeString str)
-inlineToMan _ (Str str) = return $ text $ escapeString str
-inlineToMan opts (Math InlineMath str) =
- lift (texMathToInlines InlineMath str) >>= inlineListToMan opts
-inlineToMan opts (Math DisplayMath str) = do
- contents <- lift (texMathToInlines DisplayMath str) >>= inlineListToMan opts
- return $ cr <> text ".RS" $$ contents $$ text ".RE"
-inlineToMan _ il@(RawInline f str)
- | f == Format "man" = return $ text str
- | otherwise = do
- report $ InlineNotRendered il
- return empty
-inlineToMan _ LineBreak = return $
- cr <> text ".PD 0" $$ text ".P" $$ text ".PD" <> cr
-inlineToMan _ SoftBreak = return space
-inlineToMan _ Space = return space
-inlineToMan opts (Link _ txt (src, _)) = do
- linktext <- inlineListToMan opts txt
- let srcSuffix = fromMaybe src (stripPrefix "mailto:" src)
- return $ case txt of
- [Str s]
- | escapeURI s == srcSuffix ->
- char '<' <> text srcSuffix <> char '>'
- _ -> linktext <> text " (" <> text src <> char ')'
-inlineToMan opts (Image attr 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 attr txt (source, tit))
- return $ char '[' <> text "IMAGE: " <> linkPart <> char ']'
-inlineToMan _ (Note contents) = do
- -- add to notes in state
- modify $ \st -> st{ stNotes = contents : stNotes st }
- notes <- liftM stNotes get
- let ref = show $ (length notes)
- return $ char '[' <> text ref <> char ']'