diff options
Diffstat (limited to 'src/Text/Pandoc/Writers')
| -rw-r--r-- | src/Text/Pandoc/Writers/Markdown.hs | 184 |
1 files changed, 101 insertions, 83 deletions
diff --git a/src/Text/Pandoc/Writers/Markdown.hs b/src/Text/Pandoc/Writers/Markdown.hs index a055af4aa..41bec8b87 100644 --- a/src/Text/Pandoc/Writers/Markdown.hs +++ b/src/Text/Pandoc/Writers/Markdown.hs @@ -39,7 +39,7 @@ import Text.Pandoc.Writers.Shared import Text.Pandoc.Options import Text.Pandoc.Parsing hiding (blankline, char, space) import Data.List ( group, isPrefixOf, find, intersperse, transpose, sortBy ) -import Data.Char ( isSpace, isPunctuation ) +import Data.Char ( isSpace, isPunctuation, toUpper ) import Data.Ord ( comparing ) import Text.Pandoc.Pretty import Control.Monad.State @@ -77,27 +77,10 @@ writePlain :: WriterOptions -> Pandoc -> String writePlain opts document = evalState (pandocToMarkdown opts{ writerExtensions = Set.delete Ext_escaped_line_breaks $ + Set.delete Ext_pipe_tables $ + Set.delete Ext_raw_html $ writerExtensions opts } - document') def{ stPlain = True } - where document' = plainify document - -plainify :: Pandoc -> Pandoc -plainify = walk go - where go :: Inline -> Inline - go (Emph xs) = Span ("",[],[]) xs - go (Strong xs) = Span ("",[],[]) xs - go (Strikeout xs) = Span ("",[],[]) xs - go (Superscript xs) = Span ("",[],[]) xs - go (Subscript xs) = Span ("",[],[]) xs - go (SmallCaps xs) = Span ("",[],[]) xs - go (Span _ xs) = Span ("",[],[]) xs - go (Code _ s) = Str s - go (Math _ s) = Str s - go (RawInline _ _) = Str "" - go (Link xs _) = Span ("",[],[]) xs - go (Image xs _) = Span ("",[],[]) $ [Str "["] ++ xs ++ [Str "]"] - go (Cite _ cits) = Span ("",[],[]) cits - go x = x + document) def{ stPlain = True } pandocTitleBlock :: Doc -> [Doc] -> Doc -> Doc pandocTitleBlock tit auths dat = @@ -309,9 +292,9 @@ blockToMarkdown :: WriterOptions -- ^ Options -> State WriterState Doc blockToMarkdown _ Null = return empty blockToMarkdown opts (Div attrs ils) = do - isPlain <- gets stPlain + plain <- gets stPlain contents <- blockListToMarkdown opts ils - return $ if isPlain || not (isEnabled Ext_markdown_in_html_blocks opts) + return $ if plain || not (isEnabled Ext_markdown_in_html_blocks opts) then contents <> blankline else tagWithAttrs "div" attrs <> blankline <> contents <> blankline <> "</div>" <> blankline @@ -338,21 +321,22 @@ blockToMarkdown opts (Para inlines) = (<> blankline) `fmap` blockToMarkdown opts (Plain inlines) blockToMarkdown opts (RawBlock f str) | f == "html" = do - st <- get - if stPlain st - then return empty - else return $ if isEnabled Ext_markdown_attribute opts + plain <- gets stPlain + return $ if plain + then empty + else if isEnabled Ext_markdown_attribute opts then text (addMarkdownAttribute str) <> text "\n" else text str <> text "\n" | f `elem` ["latex", "tex", "markdown"] = do - st <- get - if stPlain st - then return empty - else return $ text str <> text "\n" + plain <- gets stPlain + return $ if plain + then empty + else text str <> text "\n" blockToMarkdown _ (RawBlock _ _) = return empty -blockToMarkdown _ HorizontalRule = - return $ blankline <> text "* * * * *" <> blankline +blockToMarkdown opts HorizontalRule = do + return $ blankline <> text (replicate (writerColumns opts) '-') <> blankline blockToMarkdown opts (Header level attr inlines) = do + plain <- gets stPlain -- we calculate the id that would be used by auto_identifiers -- so we know whether to print an explicit identifier ids <- gets stIds @@ -368,18 +352,19 @@ blockToMarkdown opts (Header level attr inlines) = do space <> attrsToMarkdown attr | otherwise -> empty contents <- inlineListToMarkdown opts inlines - st <- get let setext = writerSetextHeaders opts return $ nowrap $ case level of - 1 | setext -> + 1 | plain -> blankline <> text "\n\n" <> contents <> blankline <> text "\n" + | setext -> contents <> attr' <> cr <> text (replicate (offset contents) '=') <> blankline - 2 | setext -> + 2 | plain -> blankline <> text "\n" <> contents <> blankline + | setext -> contents <> attr' <> cr <> text (replicate (offset contents) '-') <> blankline -- ghc interprets '#' characters in column 1 as linenum specifiers. - _ | stPlain st || isEnabled Ext_literate_haskell opts -> + _ | plain || isEnabled Ext_literate_haskell opts -> contents <> blankline _ -> text (replicate level '#') <> space <> contents <> attr' <> blankline blockToMarkdown opts (CodeBlock (_,classes,_) str) @@ -409,14 +394,12 @@ blockToMarkdown opts (CodeBlock attribs str) = return $ (_,(cls:_),_) -> " " <> text cls _ -> empty blockToMarkdown opts (BlockQuote blocks) = do - st <- get + plain <- gets stPlain -- if we're writing literate haskell, put a space before the bird tracks -- so they won't be interpreted as lhs... let leader = if isEnabled Ext_literate_haskell opts then " > " - else if stPlain st - then " " - else "> " + else if plain then " " else "> " contents <- blockListToMarkdown opts blocks return $ (prefixed leader contents) <> blankline blockToMarkdown opts t@(Table caption aligns widths headers rows) = do @@ -680,62 +663,84 @@ escapeSpaces (Str s) = Str $ substitute " " "\\ " s escapeSpaces Space = Str "\\ " escapeSpaces x = x +toCaps :: Inline -> Inline +toCaps (Str s) = Str (map toUpper s) +toCaps x = x + -- | Convert Pandoc inline element to markdown. inlineToMarkdown :: WriterOptions -> Inline -> State WriterState Doc inlineToMarkdown opts (Span attrs ils) = do - st <- get + plain <- gets stPlain contents <- inlineListToMarkdown opts ils - return $ if stPlain st + return $ if plain then contents else tagWithAttrs "span" attrs <> contents <> text "</span>" inlineToMarkdown opts (Emph lst) = do + plain <- gets stPlain contents <- inlineListToMarkdown opts lst - return $ "*" <> contents <> "*" + return $ if plain + then "_" <> contents <> "_" + else "*" <> contents <> "*" inlineToMarkdown opts (Strong lst) = do - contents <- inlineListToMarkdown opts lst - return $ "**" <> contents <> "**" + plain <- gets stPlain + if plain + then inlineListToMarkdown opts $ walk toCaps lst + else do + contents <- inlineListToMarkdown opts lst + return $ "**" <> contents <> "**" inlineToMarkdown opts (Strikeout lst) = do contents <- inlineListToMarkdown opts lst - return $ if isEnabled Ext_strikeout opts + plain <- gets stPlain + return $ if plain || isEnabled Ext_strikeout opts then "~~" <> contents <> "~~" else "<s>" <> contents <> "</s>" inlineToMarkdown opts (Superscript lst) = do - let lst' = walk escapeSpaces lst - contents <- inlineListToMarkdown opts lst' - return $ if isEnabled Ext_superscript opts - then "^" <> contents <> "^" - else "<sup>" <> contents <> "</sup>" + plain <- gets stPlain + if plain + then inlineListToMarkdown opts lst + else do + contents <- inlineListToMarkdown opts $ walk escapeSpaces lst + return $ if isEnabled Ext_superscript opts + then "^" <> contents <> "^" + else "<sup>" <> contents <> "</sup>" inlineToMarkdown opts (Subscript lst) = do - let lst' = walk escapeSpaces lst - contents <- inlineListToMarkdown opts lst' - return $ if isEnabled Ext_subscript opts - then "~" <> contents <> "~" - else "<sub>" <> contents <> "</sub>" + plain <- gets stPlain + if plain + then inlineListToMarkdown opts lst + else do + contents <- inlineListToMarkdown opts $ walk escapeSpaces lst + return $ if isEnabled Ext_subscript opts + then "~" <> contents <> "~" + else "<sub>" <> contents <> "</sub>" inlineToMarkdown opts (SmallCaps lst) = do - contents <- inlineListToMarkdown opts lst - st <- get - return $ if stPlain st - then contents - else tagWithAttrs "span" - ("",[],[("style","font-variant:small-caps;")]) - <> contents <> text "</span>" + plain <- gets stPlain + if plain + then inlineListToMarkdown opts $ walk toCaps lst + else do + contents <- inlineListToMarkdown opts lst + return $ tagWithAttrs "span" + ("",[],[("style","font-variant:small-caps;")]) + <> contents <> text "</span>" inlineToMarkdown opts (Quoted SingleQuote lst) = do contents <- inlineListToMarkdown opts lst return $ "‘" <> contents <> "’" inlineToMarkdown opts (Quoted DoubleQuote lst) = do contents <- inlineListToMarkdown opts lst return $ "“" <> contents <> "”" -inlineToMarkdown opts (Code attr str) = +inlineToMarkdown opts (Code attr str) = do let tickGroups = filter (\s -> '`' `elem` s) $ group str - longest = if null tickGroups + let longest = if null tickGroups then 0 else maximum $ map length tickGroups - marker = replicate (longest + 1) '`' - spacer = if (longest == 0) then "" else " " - attrs = if isEnabled Ext_inline_code_attributes opts && attr /= nullAttr + let marker = replicate (longest + 1) '`' + let spacer = if (longest == 0) then "" else " " + let attrs = if isEnabled Ext_inline_code_attributes opts && attr /= nullAttr then attrsToMarkdown attr else empty - in return $ text (marker ++ spacer ++ str ++ spacer ++ marker) <> attrs + plain <- gets stPlain + if plain + then return $ text str + else return $ text (marker ++ spacer ++ str ++ spacer ++ marker) <> attrs inlineToMarkdown _ (Str str) = do st <- get if stPlain st @@ -758,15 +763,20 @@ inlineToMarkdown opts (Math DisplayMath str) return $ "\\\\[" <> text str <> "\\\\]" | otherwise = (\x -> cr <> x <> cr) `fmap` inlineListToMarkdown opts (texMathToInlines DisplayMath str) -inlineToMarkdown opts (RawInline f str) - | f == "html" || f == "markdown" || - (isEnabled Ext_raw_tex opts && (f == "latex" || f == "tex")) = - return $ text str -inlineToMarkdown _ (RawInline _ _) = return empty -inlineToMarkdown opts (LineBreak) - | isEnabled Ext_hard_line_breaks opts = return cr - | isEnabled Ext_escaped_line_breaks opts = return $ "\\" <> cr - | otherwise = return $ " " <> cr +inlineToMarkdown opts (RawInline f str) = do + plain <- gets stPlain + if not plain && f == "html" || f == "markdown" || + (isEnabled Ext_raw_tex opts && (f == "latex" || f == "tex")) + then return $ text str + else return empty +inlineToMarkdown opts (LineBreak) = do + plain <- gets stPlain + if plain || isEnabled Ext_hard_line_breaks opts + then return cr + else return $ + if isEnabled Ext_escaped_line_breaks opts + then "\\" <> cr + else " " <> cr inlineToMarkdown _ Space = return space inlineToMarkdown opts (Cite [] lst) = inlineListToMarkdown opts lst inlineToMarkdown opts (Cite (c:cs) lst) @@ -799,6 +809,7 @@ inlineToMarkdown opts (Cite (c:cs) lst) modekey SuppressAuthor = "-" modekey _ = "" inlineToMarkdown opts (Link txt (src, tit)) = do + plain <- gets stPlain linktext <- inlineListToMarkdown opts txt let linktitle = if null tit then empty @@ -812,22 +823,29 @@ inlineToMarkdown opts (Link txt (src, tit)) = do ref <- if useRefLinks then getReference txt (src, tit) else return [] reftext <- inlineListToMarkdown opts ref return $ if useAuto - then "<" <> text srcSuffix <> ">" + then if plain + then text srcSuffix + else "<" <> text srcSuffix <> ">" else if useRefLinks then let first = "[" <> linktext <> "]" second = if txt == ref then "[]" else "[" <> reftext <> "]" in first <> second - else "[" <> linktext <> "](" <> - text src <> linktitle <> ")" + else if plain + then linktext + else "[" <> linktext <> "](" <> + text src <> linktitle <> ")" inlineToMarkdown opts (Image alternate (source, tit)) = do + plain <- gets stPlain let txt = if null alternate || alternate == [Str source] -- to prevent autolinks then [Str ""] else alternate linkPart <- inlineToMarkdown opts (Link txt (source, tit)) - return $ "!" <> linkPart + return $ if plain + then "[" <> linkPart <> "]" + else "!" <> linkPart inlineToMarkdown opts (Note contents) = do modify (\st -> st{ stNotes = contents : stNotes st }) st <- get |