diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Text/Pandoc/Readers/HTML.hs | 235 |
1 files changed, 126 insertions, 109 deletions
diff --git a/src/Text/Pandoc/Readers/HTML.hs b/src/Text/Pandoc/Readers/HTML.hs index d1e4d0024..4fab251bb 100644 --- a/src/Text/Pandoc/Readers/HTML.hs +++ b/src/Text/Pandoc/Readers/HTML.hs @@ -40,6 +40,7 @@ import Text.HTML.TagSoup import Text.HTML.TagSoup.Match import Text.Pandoc.Definition import qualified Text.Pandoc.Builder as B +import Text.Pandoc.Builder (Blocks, Inlines, trimInlines) import Text.Pandoc.Shared import Text.Pandoc.Options import Text.Pandoc.Parsing @@ -48,6 +49,8 @@ import Data.List ( intercalate ) import Data.Char ( isDigit ) import Control.Monad ( liftM, guard, when, mzero ) import Control.Applicative ( (<$>), (<$), (<*) ) +import Data.Monoid +import Data.Sequence (ViewL(..), ViewR(..), viewr, viewl) isSpace :: Char -> Bool isSpace ' ' = True @@ -66,30 +69,30 @@ readHtml opts inp = where tags = canonicalizeTags $ parseTagsOptions parseOptions{ optTagPosition = True } inp parseDoc = do - blocks <- (fixPlains False . concat) <$> manyTill block eof + blocks <- (fixPlains False) . mconcat <$> manyTill block eof meta <- stateMeta <$> getState - return $ Pandoc meta blocks + return $ Pandoc meta (B.toList blocks) type TagParser = Parser [Tag String] ParserState -pBody :: TagParser [Block] +pBody :: TagParser Blocks pBody = pInTags "body" block -pHead :: TagParser [Block] -pHead = pInTags "head" $ pTitle <|> pMetaTag <|> ([] <$ pAnyTag) - where pTitle = pInTags "title" inline >>= setTitle . normalizeSpaces - setTitle t = [] <$ (updateState $ B.setMeta "title" (B.fromList t)) +pHead :: TagParser Blocks +pHead = pInTags "head" $ pTitle <|> pMetaTag <|> (mempty <$ pAnyTag) + where pTitle = pInTags "title" inline >>= setTitle . trimInlines + setTitle t = mempty <$ (updateState $ B.setMeta "title" t) pMetaTag = do mt <- pSatisfy (~== TagOpen "meta" []) let name = fromAttrib "name" mt if null name - then return [] + then return mempty else do let content = fromAttrib "content" mt updateState $ B.setMeta name (B.text content) - return [] + return mempty -block :: TagParser [Block] +block :: TagParser Blocks block = choice [ pPara , pHeader @@ -105,10 +108,10 @@ block = choice , pRawHtmlBlock ] -pList :: TagParser [Block] +pList :: TagParser Blocks pList = pBulletList <|> pOrderedList <|> pDefinitionList -pBulletList :: TagParser [Block] +pBulletList :: TagParser Blocks pBulletList = try $ do pSatisfy (~== TagOpen "ul" []) let nonItem = pSatisfy (\t -> @@ -118,9 +121,9 @@ pBulletList = try $ do -- treat it as a list item, though it's not valid xhtml... skipMany nonItem items <- manyTill (pInTags "li" block >>~ skipMany nonItem) (pCloses "ul") - return [BulletList $ map (fixPlains True) items] + return $ B.bulletList $ map (fixPlains True) items -pOrderedList :: TagParser [Block] +pOrderedList :: TagParser Blocks pOrderedList = try $ do TagOpen _ attribs <- pSatisfy (~== TagOpen "ol" []) let (start, style) = (sta', sty') @@ -146,27 +149,27 @@ pOrderedList = try $ do -- treat it as a list item, though it's not valid xhtml... skipMany nonItem items <- manyTill (pInTags "li" block >>~ skipMany nonItem) (pCloses "ol") - return [OrderedList (start, style, DefaultDelim) $ map (fixPlains True) items] + return $ B.orderedListWith (start, style, DefaultDelim) $ map (fixPlains True) items -pDefinitionList :: TagParser [Block] +pDefinitionList :: TagParser Blocks pDefinitionList = try $ do pSatisfy (~== TagOpen "dl" []) items <- manyTill pDefListItem (pCloses "dl") - return [DefinitionList items] + return $ B.definitionList items -pDefListItem :: TagParser ([Inline],[[Block]]) +pDefListItem :: TagParser (Inlines, [Blocks]) pDefListItem = try $ do let nonItem = pSatisfy (\t -> not (t ~== TagOpen "dt" []) && not (t ~== TagOpen "dd" []) && not (t ~== TagClose "dl")) terms <- many1 (try $ skipMany nonItem >> pInTags "dt" inline) defs <- many1 (try $ skipMany nonItem >> pInTags "dd" block) skipMany nonItem - let term = intercalate [LineBreak] terms + let term = foldl1 (\x y -> x <> B.linebreak <> y) terms return (term, map (fixPlains True) defs) -fixPlains :: Bool -> [Block] -> [Block] -fixPlains inList bs = if any isParaish bs - then map plainToPara bs +fixPlains :: Bool -> Blocks -> Blocks +fixPlains inList bs = if any isParaish bs' + then B.fromList $ map plainToPara bs' else bs where isParaish (Para _) = True isParaish (CodeBlock _ _) = True @@ -178,6 +181,7 @@ fixPlains inList bs = if any isParaish bs isParaish _ = False plainToPara (Plain xs) = Para xs plainToPara x = x + bs' = B.toList bs pRawTag :: TagParser String pRawTag = do @@ -187,20 +191,20 @@ pRawTag = do then return [] else return $ renderTags' [tag] -pDiv :: TagParser [Block] +pDiv :: TagParser Blocks pDiv = try $ do getOption readerParseRaw >>= guard TagOpen _ attr <- lookAhead $ pSatisfy $ tagOpen (=="div") (const True) contents <- pInTags "div" block - return [Div (mkAttr attr) contents] + return $ B.divWith (mkAttr attr) contents -pRawHtmlBlock :: TagParser [Block] +pRawHtmlBlock :: TagParser Blocks pRawHtmlBlock = do raw <- pHtmlBlock "script" <|> pHtmlBlock "style" <|> pRawTag parseRaw <- getOption readerParseRaw if parseRaw && not (null raw) - then return [RawBlock (Format "html") raw] - else return [] + then return $ B.rawBlock "html" raw + else return mempty pHtmlBlock :: String -> TagParser String pHtmlBlock t = try $ do @@ -208,35 +212,34 @@ pHtmlBlock t = try $ do contents <- manyTill pAnyTag (pSatisfy (~== TagClose t)) return $ renderTags' $ [open] ++ contents ++ [TagClose t] -pHeader :: TagParser [Block] +pHeader :: TagParser Blocks pHeader = try $ do TagOpen tagtype attr <- pSatisfy $ tagOpen (`elem` ["h1","h2","h3","h4","h5","h6"]) (const True) let bodyTitle = TagOpen tagtype attr ~== TagOpen "h1" [("class","title")] let level = read (drop 1 tagtype) - contents <- liftM concat $ manyTill inline (pCloses tagtype <|> eof) + contents <- trimInlines . mconcat <$> manyTill inline (pCloses tagtype <|> eof) let ident = fromMaybe "" $ lookup "id" attr let classes = maybe [] words $ lookup "class" attr let keyvals = [(k,v) | (k,v) <- attr, k /= "class", k /= "id"] return $ if bodyTitle - then [] -- skip a representation of the title in the body - else [Header level (ident, classes, keyvals) $ - normalizeSpaces contents] + then mempty -- skip a representation of the title in the body + else B.headerWith (ident, classes, keyvals) level contents -pHrule :: TagParser [Block] +pHrule :: TagParser Blocks pHrule = do pSelfClosing (=="hr") (const True) - return [HorizontalRule] + return B.horizontalRule -pTable :: TagParser [Block] +pTable :: TagParser Blocks pTable = try $ do TagOpen _ _ <- pSatisfy (~== TagOpen "table" []) skipMany pBlank - caption <- option [] $ pInTags "caption" inline >>~ skipMany pBlank + caption <- option mempty $ pInTags "caption" inline >>~ skipMany pBlank -- TODO actually read these and take width information from them widths' <- pColgroup <|> many pCol - head' <- option [] $ pOptInTag "thead" $ pInTags "tr" (pCell "th") + head' <- option mempty $ pOptInTag "thead" $ pInTags "tr" (pCell "th") skipMany pBlank rows <- pOptInTag "tbody" $ many1 $ try $ skipMany pBlank >> pInTags "tr" (pCell "td") @@ -245,19 +248,21 @@ pTable = try $ do let isSinglePlain [] = True isSinglePlain [Plain _] = True isSinglePlain _ = False - let isSimple = all isSinglePlain $ concat (head':rows) - let cols = length $ if null head' - then head rows - else head' + let lHead = B.toList head' + let lRows = map B.toList rows + let isSimple = all isSinglePlain (lHead:lRows) + let cols = length $ if null lHead + then head lRows + else lHead -- fail if there are colspans or rowspans - guard $ all (\r -> length r == cols) rows + guard $ all (\r -> length r == cols) lRows let aligns = replicate cols AlignLeft let widths = if null widths' then if isSimple then replicate cols 0 else replicate cols (1.0 / fromIntegral cols) else widths' - return [Table caption aligns widths head' rows] + return $ B.table caption (zip aligns widths) [head'] [rows] pCol :: TagParser Double pCol = try $ do @@ -275,31 +280,31 @@ pColgroup = try $ do skipMany pBlank manyTill pCol (pCloses "colgroup" <|> eof) <* skipMany pBlank -pCell :: String -> TagParser [TableCell] +pCell :: String -> TagParser Blocks pCell celltype = try $ do skipMany pBlank res <- pInTags celltype block skipMany pBlank - return [res] + return res -pBlockQuote :: TagParser [Block] +pBlockQuote :: TagParser Blocks pBlockQuote = do contents <- pInTags "blockquote" block - return [BlockQuote $ fixPlains False contents] + return $ B.blockQuote $ fixPlains False contents -pPlain :: TagParser [Block] +pPlain :: TagParser Blocks pPlain = do - contents <- liftM (normalizeSpaces . concat) $ many1 inline - if null contents - then return [] - else return [Plain contents] + contents <- trimInlines . mconcat <$> many1 inline + if B.isNull contents + then return mempty + else return $ B.plain contents -pPara :: TagParser [Block] +pPara :: TagParser Blocks pPara = do - contents <- pInTags "p" inline - return [Para $ normalizeSpaces contents] + contents <- trimInlines <$> pInTags "p" inline + return $ B.para contents -pCodeBlock :: TagParser [Block] +pCodeBlock :: TagParser Blocks pCodeBlock = try $ do TagOpen _ attr <- pSatisfy (~== TagOpen "pre" []) contents <- manyTill pAnyTag (pCloses "pre" <|> eof) @@ -312,9 +317,9 @@ pCodeBlock = try $ do let result = case reverse result' of '\n':_ -> init result' _ -> result' - return [CodeBlock (mkAttr attr) result] + return $ B.codeBlockWith (mkAttr attr) result -inline :: TagParser [Inline] +inline :: TagParser Inlines inline = choice [ pTagText , pQ @@ -354,7 +359,7 @@ pSelfClosing f g = do optional $ pSatisfy (tagClose f) return open -pQ :: TagParser [Inline] +pQ :: TagParser Inlines pQ = do quoteContext <- stateQuoteContext `fmap` getState let quoteType = case quoteContext of @@ -363,82 +368,93 @@ pQ = do let innerQuoteContext = if quoteType == SingleQuote then InSingleQuote else InDoubleQuote - withQuoteContext innerQuoteContext $ pInlinesInTags "q" (Quoted quoteType) + let constructor = case quoteType of + SingleQuote -> B.singleQuoted + DoubleQuote -> B.doubleQuoted + withQuoteContext innerQuoteContext $ + pInlinesInTags "q" constructor -pEmph :: TagParser [Inline] -pEmph = pInlinesInTags "em" Emph <|> pInlinesInTags "i" Emph +pEmph :: TagParser Inlines +pEmph = pInlinesInTags "em" B.emph <|> pInlinesInTags "i" B.emph -pStrong :: TagParser [Inline] -pStrong = pInlinesInTags "strong" Strong <|> pInlinesInTags "b" Strong +pStrong :: TagParser Inlines +pStrong = pInlinesInTags "strong" B.strong <|> pInlinesInTags "b" B.strong -pSuperscript :: TagParser [Inline] -pSuperscript = pInlinesInTags "sup" Superscript +pSuperscript :: TagParser Inlines +pSuperscript = pInlinesInTags "sup" B.superscript -pSubscript :: TagParser [Inline] -pSubscript = pInlinesInTags "sub" Subscript +pSubscript :: TagParser Inlines +pSubscript = pInlinesInTags "sub" B.subscript -pStrikeout :: TagParser [Inline] +pStrikeout :: TagParser Inlines pStrikeout = do - pInlinesInTags "s" Strikeout <|> - pInlinesInTags "strike" Strikeout <|> - pInlinesInTags "del" Strikeout <|> + pInlinesInTags "s" B.strikeout <|> + pInlinesInTags "strike" B.strikeout <|> + pInlinesInTags "del" B.strikeout <|> try (do pSatisfy (~== TagOpen "span" [("class","strikeout")]) - contents <- liftM concat $ manyTill inline (pCloses "span") - return [Strikeout contents]) + contents <- mconcat <$> manyTill inline (pCloses "span") + return $ B.strikeout contents) -pLineBreak :: TagParser [Inline] +pLineBreak :: TagParser Inlines pLineBreak = do pSelfClosing (=="br") (const True) - return [LineBreak] + return B.linebreak -pLink :: TagParser [Inline] +pLink :: TagParser Inlines pLink = try $ do tag <- pSatisfy (tagOpenLit "a" (isJust . lookup "href")) let url = fromAttrib "href" tag let title = fromAttrib "title" tag - lab <- liftM concat $ manyTill inline (pCloses "a") - return [Link (normalizeSpaces lab) (escapeURI url, title)] + lab <- trimInlines . mconcat <$> manyTill inline (pCloses "a") + return $ B.link (escapeURI url) title lab -pImage :: TagParser [Inline] +pImage :: TagParser Inlines pImage = do tag <- pSelfClosing (=="img") (isJust . lookup "src") let url = fromAttrib "src" tag let title = fromAttrib "title" tag let alt = fromAttrib "alt" tag - return [Image (B.toList $ B.text alt) (escapeURI url, title)] + return $ B.image (escapeURI url) title (B.text alt) -pCode :: TagParser [Inline] +pCode :: TagParser Inlines pCode = try $ do (TagOpen open attr) <- pSatisfy $ tagOpen (`elem` ["code","tt"]) (const True) result <- manyTill pAnyTag (pCloses open) - return [Code (mkAttr attr) $ intercalate " " $ lines $ innerText result] + return $ B.codeWith (mkAttr attr) $ intercalate " " $ lines $ innerText result -pSpan :: TagParser [Inline] +pSpan :: TagParser Inlines pSpan = try $ do getOption readerParseRaw >>= guard TagOpen _ attr <- lookAhead $ pSatisfy $ tagOpen (=="span") (const True) contents <- pInTags "span" inline - return [Span (mkAttr attr) contents] + return $ B.spanWith (mkAttr attr) contents -pRawHtmlInline :: TagParser [Inline] +pRawHtmlInline :: TagParser Inlines pRawHtmlInline = do result <- pSatisfy (tagComment (const True)) <|> pSatisfy isInlineTag parseRaw <- getOption readerParseRaw if parseRaw - then return [RawInline (Format "html") $ renderTags' [result]] - else return [] + then return $ B.rawInline "html" $ renderTags' [result] + else return mempty -pInlinesInTags :: String -> ([Inline] -> Inline) - -> TagParser [Inline] +pInlinesInTags :: String -> (Inlines -> Inlines) + -> TagParser Inlines pInlinesInTags tagtype f = do - contents <- pInTags tagtype inline - return [f $ normalizeSpaces contents] - -pInTags :: String -> TagParser [a] - -> TagParser [a] + contents <- B.unMany <$> pInTags tagtype inline + let left = case viewl contents of + EmptyL -> mempty + (a :< _) -> padSpace a + let right = case viewr contents of + EmptyR -> mempty + (_ :> a) -> padSpace a + return (left <> f (trimInlines . B.Many $ contents) <> right) + where padSpace a = if a == Space then B.space else mempty + +pInTags :: (Monoid a) => String -> TagParser a + -> TagParser a pInTags tagtype parser = try $ do pSatisfy (~== TagOpen tagtype []) - liftM concat $ manyTill parser (pCloses tagtype <|> eof) + mconcat <$> manyTill parser (pCloses tagtype <|> eof) pOptInTag :: String -> TagParser a -> TagParser a @@ -461,36 +477,36 @@ pCloses tagtype = try $ do (TagClose "dl") | tagtype == "li" -> return () _ -> mzero -pTagText :: TagParser [Inline] +pTagText :: TagParser Inlines pTagText = try $ do (TagText str) <- pSatisfy isTagText st <- getState case runParser (many pTagContents) st "text" str of Left _ -> fail $ "Could not parse `" ++ str ++ "'" - Right result -> return result + Right result -> return $ mconcat result pBlank :: TagParser () pBlank = try $ do (TagText str) <- pSatisfy isTagText guard $ all isSpace str -pTagContents :: Parser [Char] ParserState Inline +pTagContents :: Parser [Char] ParserState Inlines pTagContents = - Math DisplayMath `fmap` mathDisplay - <|> Math InlineMath `fmap` mathInline + B.displayMath <$> mathDisplay + <|> B.math <$> mathInline <|> pStr <|> pSpace <|> smartPunctuation pTagContents <|> pSymbol <|> pBad -pStr :: Parser [Char] ParserState Inline +pStr :: Parser [Char] ParserState Inlines pStr = do result <- many1 $ satisfy $ \c -> not (isSpace c) && not (isSpecial c) && not (isBad c) pos <- getPosition updateState $ \s -> s{ stateLastStrPos = Just pos } - return $ Str result + return $ B.str result isSpecial :: Char -> Bool isSpecial '"' = True @@ -504,13 +520,13 @@ isSpecial '\8220' = True isSpecial '\8221' = True isSpecial _ = False -pSymbol :: Parser [Char] ParserState Inline -pSymbol = satisfy isSpecial >>= return . Str . (:[]) +pSymbol :: Parser [Char] ParserState Inlines +pSymbol = satisfy isSpecial >>= return . B.str . (:[]) isBad :: Char -> Bool isBad c = c >= '\128' && c <= '\159' -- not allowed in HTML -pBad :: Parser [Char] ParserState Inline +pBad :: Parser [Char] ParserState Inlines pBad = do c <- satisfy isBad let c' = case c of @@ -542,10 +558,10 @@ pBad = do '\158' -> '\382' '\159' -> '\376' _ -> '?' - return $ Str [c'] + return $ B.str [c'] -pSpace :: Parser [Char] ParserState Inline -pSpace = many1 (satisfy isSpace) >> return Space +pSpace :: Parser [Char] ParserState Inlines +pSpace = many1 (satisfy isSpace) >> return B.space -- -- Constants @@ -679,3 +695,4 @@ mkAttr attr = (attribsId, attribsClasses, attribsKV) attribsClasses = words $ fromMaybe "" $ lookup "class" attr attribsKV = filter (\(k,_) -> k /= "class" && k /= "id") attr + |