diff options
Diffstat (limited to 'src/Text/Pandoc/Readers')
| -rw-r--r-- | src/Text/Pandoc/Readers/Markdown.hs | 146 |
1 files changed, 64 insertions, 82 deletions
diff --git a/src/Text/Pandoc/Readers/Markdown.hs b/src/Text/Pandoc/Readers/Markdown.hs index a7f46a864..06768d170 100644 --- a/src/Text/Pandoc/Readers/Markdown.hs +++ b/src/Text/Pandoc/Readers/Markdown.hs @@ -58,42 +58,13 @@ testString = testStringWith parseMarkdown -- spaceChars = " \t" -endLineChars = "\n" -labelStart = '[' -labelEnd = ']' -labelSep = ':' -srcStart = '(' -srcEnd = ')' -imageStart = '!' -noteStart = '^' -codeStart = '`' -codeEnd = '`' -emphStart = '*' -emphEnd = '*' -emphStartAlt = '_' -emphEndAlt = '_' -autoLinkStart = '<' -autoLinkEnd = '>' -mathStart = '$' -mathEnd = '$' bulletListMarkers = "*+-" -escapeChar = '\\' hruleChars = "*-_" -quoteChars = "'\"" -atxHChar = '#' titleOpeners = "\"'(" -setextHChars = ['=','-'] -blockQuoteChar = '>' -hyphenChar = '-' -ellipsesChar = '.' -listColSepChar = '|' -entityStart = '&' +setextHChars = "=-" -- treat these as potentially non-text when parsing inline: -specialChars = [escapeChar, labelStart, labelEnd, emphStart, emphEnd, - emphStartAlt, emphEndAlt, codeStart, codeEnd, autoLinkEnd, - autoLinkStart, mathStart, mathEnd, imageStart, noteStart, - hyphenChar, ellipsesChar, entityStart] ++ quoteChars +specialChars = "\\[]*_~`<>$!^-.&'\"" -- -- auxiliary functions @@ -113,11 +84,6 @@ nonindentSpaces = do let tabStop = stateTabStop state choice (map (\n -> (try (count n (char ' ')))) (reverse [0..(tabStop - 1)])) --- | Fail if reader is in strict markdown syntax mode. -failIfStrict = do - state <- getState - if stateStrict state then fail "Strict markdown mode" else return () - -- | Fail unless we're at beginning of a line. failUnlessBeginningOfLine = do pos <- getPosition @@ -208,21 +174,21 @@ parseMarkdown = do referenceKey = try $ do nonindentSpaces label <- reference - char labelSep + char ':' skipSpaces - option ' ' (char autoLinkStart) - src <- many (noneOf [autoLinkEnd, '\n', '\t', ' ']) - option ' ' (char autoLinkEnd) + option ' ' (char '<') + src <- many (noneOf "> \n\t") + option ' ' (char '>') tit <- option "" title blanklines return $ KeyBlock label (removeTrailingSpace src, tit) -noteMarker = try (do - char labelStart - char noteStart - manyTill (noneOf " \t\n") (char labelEnd)) +noteMarker = try $ do + char '[' + char '^' + manyTill (noneOf " \t\n") (char ']') -rawLine = try (do +rawLine = try $ do notFollowedBy' blankline notFollowedBy' noteMarker contents <- many1 nonEndline @@ -230,7 +196,7 @@ rawLine = try (do newline option "" (try indentSpaces) return "\n") - return (contents ++ end)) + return (contents ++ end) rawLines = do lines <- many1 rawLine @@ -276,13 +242,13 @@ block = choice [ header header = choice [ setextHeader, atxHeader ] <?> "header" atxHeader = try (do - lead <- many1 (char atxHChar) + lead <- many1 (char '#') skipSpaces txt <- manyTill inline atxClosing return (Header (length lead) (normalizeSpaces txt))) atxClosing = try (do - skipMany (char atxHChar) + skipMany (char '#') skipSpaces newline option "" blanklines) @@ -357,7 +323,7 @@ emacsBoxQuote = try (do emailBlockQuoteStart = try (do nonindentSpaces - char blockQuoteChar + char '>' option ' ' (char ' ') return "> ") @@ -741,6 +707,9 @@ inline = choice [ rawLaTeXInline' , math , strong , emph + , strikeout + , superscript + , subscript , smartPunctuation , code , ltSign @@ -755,7 +724,7 @@ escapedChar = try $ do char '\\' state <- getState result <- if stateStrict state - then oneOf "\\`*_{}[]()>#+-.!" + then oneOf "\\`*_{}[]()>#+-.!~" else satisfy (not . isAlphaNum) return (Str [result]) @@ -771,42 +740,55 @@ symbol = do result <- oneOf specialCharsMinusLt return (Str [result]) --- parses inline code, between n codeStarts and n codeEnds +-- parses inline code, between n `s and n `s code = try (do - starts <- many1 (char codeStart) + starts <- many1 (char '`') let num = length starts - result <- many1Till anyChar (try (count num (char codeEnd))) + result <- many1Till anyChar (try (count num (char '`'))) -- get rid of any internal newlines let result' = removeLeadingTrailingSpace $ joinWithSep " " $ lines result return (Code result')) -mathWord = many1 (choice [ (noneOf (" \t\n\\" ++ [mathEnd])), +mathWord = many1 (choice [ (noneOf " \t\n\\$"), (try (do c <- char '\\' - notFollowedBy (char mathEnd) + notFollowedBy (char '$') return c))]) math = try (do failIfStrict - char mathStart + char '$' notFollowedBy space words <- sepBy1 mathWord (many1 space) - char mathEnd + char '$' return (TeX ("$" ++ (joinWithSep " " words) ++ "$"))) emph = do - result <- choice [ (enclosed (char emphStart) (char emphEnd) inline), - (enclosed (char emphStartAlt) (char emphEndAlt) inline) ] - return (Emph (normalizeSpaces result)) + result <- choice [ (enclosed (char '*') (char '*') inline), + (enclosed (char '_') (char '_') inline) ] + return $ Emph (normalizeSpaces result) strong = do - result <- (enclosed strongStart strongEnd inline) <|> - (enclosed strongStartAlt strongEndAlt inline) - return (Strong (normalizeSpaces result)) - where strongStart = count 2 (char emphStart) - strongEnd = try strongStart - strongStartAlt = count 2 (char emphStartAlt) - strongEndAlt = try strongStartAlt + result <- (enclosed (string "**") (string "**") inline) <|> + (enclosed (string "__") (string "__") inline) + return $ Strong (normalizeSpaces result) + +strikeout = do + failIfStrict + result <- enclosed (string "~~") (string "~~") inline + return $ Strikeout (normalizeSpaces result) + +superscript = do + failIfStrict + result <- enclosed (char '^') (char '^') + (notFollowedBy' whitespace >> inline) -- may not contain Space + return $ Superscript result + +subscript = do + failIfStrict + result <- enclosed (char '~') (char '~') + (notFollowedBy' whitespace >> inline) -- may not contain Space + return $ Subscript result smartPunctuation = do failUnlessSmart @@ -899,13 +881,13 @@ linebreak = try (do endline return LineBreak ) -nonEndline = noneOf endLineChars +nonEndline = satisfy (/='\n') entity = do ent <- characterEntity return $ Str [ent] -strChar = noneOf (specialChars ++ spaceChars ++ endLineChars) +strChar = noneOf (specialChars ++ spaceChars ++ "\n") str = do result <- many1 strChar @@ -919,7 +901,7 @@ endline = try (do if stateStrict st then do notFollowedBy' emailBlockQuoteStart - notFollowedBy (char atxHChar) -- atx header + notFollowedBy (char '#') -- atx header notFollowedBy (try (do{manyTill anyChar newline; oneOf setextHChars})) -- setext header else return () @@ -934,17 +916,17 @@ endline = try (do -- -- a reference label for a link -reference = inlinesInBalanced [labelStart] [labelEnd] >>= (return . normalizeSpaces) +reference = inlinesInBalanced "[" "]" >>= (return . normalizeSpaces) -- source for a link, with optional title source = try $ do - char srcStart - option ' ' (char autoLinkStart) - src <- many (noneOf [srcEnd, autoLinkEnd, ' ', '\t', '\n']) - option ' ' (char autoLinkEnd) + char '(' + option ' ' (char '<') + src <- many (noneOf ")> \t\n") + option ' ' (char '>') tit <- option "" title skipSpaces - char srcEnd + char ')' return (removeTrailingSpace src, tit) titleWith startChar endChar = try (do @@ -986,23 +968,23 @@ autoLink = autoLinkEmail <|> autoLinkRegular -- a link <like@this.com> autoLinkEmail = try $ do - char autoLinkStart + char '<' name <- many1Till (noneOf "/:<> \t\n") (char '@') domain <- sepBy1 (many1 (noneOf "/:.@<> \t\n")) (char '.') let src = name ++ "@" ++ (joinWithSep "." domain) - char autoLinkEnd + char '>' return $ Link [Str src] (("mailto:" ++ src), "") -- a link <http://like.this.com> autoLinkRegular = try $ do - char autoLinkStart + char '<' prot <- oneOfStrings ["http:", "ftp:", "mailto:"] - rest <- many1Till (noneOf " \t\n<>") (char autoLinkEnd) + rest <- many1Till (noneOf " \t\n<>") (char '>') let src = prot ++ rest return $ Link [Str src] (src, "") image = try (do - char imageStart + char '!' (Link label src) <- link return (Image label src)) @@ -1017,7 +999,7 @@ note = try $ do inlineNote = try $ do failIfStrict - char noteStart + char '^' contents <- inlinesInBalanced "[" "]" return (Note [Para contents]) |