{-# LANGUAGE OverloadedStrings, ScopedTypeVariables, PatternGuards #-} {- Copyright (C) 2006-2014 John MacFarlane 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.LaTeX Copyright : Copyright (C) 2006-2014 John MacFarlane License : GNU GPL, version 2 or above Maintainer : John MacFarlane Stability : alpha Portability : portable Conversion of 'Pandoc' format into LaTeX. -} module Text.Pandoc.Writers.LaTeX ( writeLaTeX ) where import Text.Pandoc.Definition import Text.Pandoc.Walk import Text.Pandoc.Shared import Text.Pandoc.Writers.Shared import Text.Pandoc.Options import Text.Pandoc.Templates import Text.Printf ( printf ) import Network.URI ( isURI, unEscapeString ) import Data.List ( (\\), isSuffixOf, isInfixOf, stripPrefix, isPrefixOf, intercalate, intersperse ) import Data.Char ( toLower, isPunctuation, isAscii, isLetter, isDigit, ord ) import Data.Maybe ( fromMaybe ) import Control.Applicative ((<|>)) import Control.Monad.State import Text.Pandoc.Pretty import Text.Pandoc.Slides import Text.Pandoc.Highlighting (highlight, styleToLaTeX, formatLaTeXInline, formatLaTeXBlock, toListingsLanguage) data WriterState = WriterState { stInNote :: Bool -- true if we're in a note , stInQuote :: Bool -- true if in a blockquote , stInMinipage :: Bool -- true if in minipage , stNotes :: [Doc] -- notes in a minipage , stOLLevel :: Int -- level of ordered list nesting , stOptions :: WriterOptions -- writer options, so they don't have to be parameter , stVerbInNote :: Bool -- true if document has verbatim text in note , stTable :: Bool -- true if document has a table , stStrikeout :: Bool -- true if document has strikeout , stUrl :: Bool -- true if document has visible URL link , stGraphics :: Bool -- true if document contains images , stLHS :: Bool -- true if document has literate haskell code , stBook :: Bool -- true if document uses book or memoir class , stCsquotes :: Bool -- true if document uses csquotes , stHighlighting :: Bool -- true if document has highlighted code , stIncremental :: Bool -- true if beamer lists should be displayed bit by bit , stInternalLinks :: [String] -- list of internal link targets , stUsesEuro :: Bool -- true if euro symbol used } -- | Convert Pandoc to LaTeX. writeLaTeX :: WriterOptions -> Pandoc -> String writeLaTeX options document = evalState (pandocToLaTeX options document) $ WriterState { stInNote = False, stInQuote = False, stInMinipage = False, stNotes = [], stOLLevel = 1, stOptions = options, stVerbInNote = False, stTable = False, stStrikeout = False, stUrl = False, stGraphics = False, stLHS = False, stBook = writerChapters options, stCsquotes = False, stHighlighting = False, stIncremental = writerIncremental options, stInternalLinks = [], stUsesEuro = False } pandocToLaTeX :: WriterOptions -> Pandoc -> State WriterState String pandocToLaTeX options (Pandoc meta blocks) = do -- Strip off final 'references' header if --natbib or --biblatex let method = writerCiteMethod options let blocks' = if method == Biblatex || method == Natbib then case reverse blocks of (Div (_,["references"],_) _):xs -> reverse xs _ -> blocks else blocks -- see if there are internal links let isInternalLink (Link _ ('#':xs,_)) = [xs] isInternalLink _ = [] modify $ \s -> s{ stInternalLinks = query isInternalLink blocks' } let template = writerTemplate options -- set stBook depending on documentclass let bookClasses = ["memoir","book","report","scrreprt","scrbook"] case lookup "documentclass" (writerVariables options) of Just x | x `elem` bookClasses -> modify $ \s -> s{stBook = True} | otherwise -> return () Nothing | any (\x -> "\\documentclass" `isPrefixOf` x && (any (`isSuffixOf` x) bookClasses)) (lines template) -> modify $ \s -> s{stBook = True} | otherwise -> return () -- check for \usepackage...{csquotes}; if present, we'll use -- \enquote{...} for smart quotes: when ("{csquotes}" `isInfixOf` template) $ modify $ \s -> s{stCsquotes = True} let colwidth = if writerWrapText options then Just $ writerColumns options else Nothing metadata <- metaToJSON options (fmap (render colwidth) . blockListToLaTeX) (fmap (render colwidth) . inlineListToLaTeX) meta let (blocks'', lastHeader) = if writerCiteMethod options == Citeproc then (blocks', []) else case last blocks' of Header 1 _ il -> (init blocks', il) _ -> (blocks', []) blocks''' <- if writerBeamer options then toSlides blocks'' else return blocks'' body <- mapM (elementToLaTeX options) $ hierarchicalize blocks''' (biblioTitle :: String) <- liftM (render colwidth) $ inlineListToLaTeX lastHeader let main = render colwidth $ vsep body st <- get titleMeta <- stringToLaTeX TextString $ stringify $ docTitle meta authorsMeta <- mapM (stringToLaTeX TextString . stringify) $ docAuthors meta let context = defField "toc" (writerTableOfContents options) $ defField "toc-depth" (show (writerTOCDepth options - if stBook st then 1 else 0)) $ defField "body" main $ defField "title-meta" titleMeta $ defField "author-meta" (intercalate "; " authorsMeta) $ defField "documentclass" (if writerBeamer options then ("beamer" :: String) else if stBook st then "book" else "article") $ defField "verbatim-in-note" (stVerbInNote st) $ defField "tables" (stTable st) $ defField "strikeout" (stStrikeout st) $ defField "url" (stUrl st) $ defField "numbersections" (writerNumberSections options) $ defField "lhs" (stLHS st) $ defField "graphics" (stGraphics st) $ defField "book-class" (stBook st) $ defField "euro" (stUsesEuro st) $ defField "listings" (writerListings options || stLHS st) $ defField "beamer" (writerBeamer options) $ defField "mainlang" (maybe "" (reverse . takeWhile (/=',') . reverse) (lookup "lang" $ writerVariables options)) $ (if stHighlighting st then defField "highlighting-macros" (styleToLaTeX $ writerHighlightStyle options ) else id) $ (case writerCiteMethod options of Natbib -> defField "biblio-title" biblioTitle . defField "natbib" True Biblatex -> defField "biblio-title" biblioTitle . defField "biblatex" True _ -> id) $ metadata return $ if writerStandalone options then renderTemplate' template context else main -- | Convert Elements to LaTeX elementToLaTeX :: WriterOptions -> Element -> State WriterState Doc elementToLaTeX _ (Blk block) = blockToLaTeX block elementToLaTeX opts (Sec level _ (id',classes,_) title' elements) = do header' <- sectionHeader ("unnumbered" `elem` classes) id' level title' innerContents <- mapM (elementToLaTeX opts) elements return $ vsep (header' : innerContents) data StringContext = TextString | URLString | CodeString deriving (Eq) -- escape things as needed for LaTeX stringToLaTeX :: StringContext -> String -> State WriterState String stringToLaTeX _ [] = return "" stringToLaTeX ctx (x:xs) = do opts <- gets stOptions rest <- stringToLaTeX ctx xs let ligatures = writerTeXLigatures opts && ctx == TextString let isUrl = ctx == URLString when (x == '€') $ modify $ \st -> st{ stUsesEuro = True } return $ case x of '€' -> "\\euro{}" ++ rest '{' -> "\\{" ++ rest '}' -> "\\}" ++ rest '$' -> "\\$" ++ rest '%' -> "\\%" ++ rest '&' -> "\\&" ++ rest '_' | not isUrl -> "\\_" ++ rest '#' -> "\\#" ++ rest '-' | not isUrl -> case xs of -- prevent adjacent hyphens from forming ligatures ('-':_) -> "-\\/" ++ rest _ -> '-' : rest '~' | not isUrl -> "\\textasciitilde{}" ++ rest '^' -> "\\^{}" ++ rest '\\'| isUrl -> '/' : rest -- NB. / works as path sep even on Windows | otherwise -> "\\textbackslash{}" ++ rest '|' -> "\\textbar{}" ++ rest '<' -> "\\textless{}" ++ rest '>' -> "\\textgreater{}" ++ rest '[' -> "{[}" ++ rest -- to avoid interpretation as ']' -> "{]}" ++ rest -- optional arguments '\'' | ctx == CodeString -> "\\textquotesingle{}" ++ rest '\160' -> "~" ++ rest '\x2026' -> "\\ldots{}" ++ rest '\x2018' | ligatures -> "`" ++ rest '\x2019' | ligatures -> "'" ++ rest '\x201C' | ligatures -> "``" ++ rest '\x201D' | ligatures -> "''" ++ rest '\x2014' | ligatures -> "---" ++ rest '\x2013' | ligatures -> "--" ++ rest _ -> x : rest toLabel :: String -> State WriterState String toLabel z = go `fmap` stringToLaTeX URLString z where go [] = "" go (x:xs) | (isLetter x || isDigit x) && isAscii x = x:go xs | elem x "-+=:;." = x:go xs | otherwise = "ux" ++ printf "%x" (ord x) ++ go xs -- | Puts contents into LaTeX command. inCmd :: String -> Doc -> Doc inCmd cmd contents = char '\\' <> text cmd <> braces contents toSlides :: [Block] -> State WriterState [Block] toSlides bs = do opts <- gets stOptions let slideLevel = fromMaybe (getSlideLevel bs) $ writerSlideLevel opts let bs' = prepSlides slideLevel bs concat `fmap` (mapM (elementToBeamer slideLevel) $ hierarchicalize bs') elementToBeamer :: Int -> Element -> State WriterState [Block] elementToBeamer _slideLevel (Blk b) = return [b] elementToBeamer slideLevel (Sec lvl _num (ident,classes,kvs) tit elts) | lvl > slideLevel = do bs <- concat `fmap` mapM (elementToBeamer slideLevel) elts return $ Para ( RawInline "latex" "\\begin{block}{" : tit ++ [RawInline "latex" "}"] ) : bs ++ [RawBlock "latex" "\\end{block}"] | lvl < slideLevel = do bs <- concat `fmap` mapM (elementToBeamer slideLevel) elts return $ (Header lvl (ident,classes,kvs) tit) : bs | otherwise = do -- lvl == slideLevel -- note: [fragile] is required or verbatim breaks let hasCodeBlock (CodeBlock _ _) = [True] hasCodeBlock _ = [] let hasCode (Code _ _) = [True] hasCode _ = [] opts <- gets stOptions let fragile = not $ null $ query hasCodeBlock elts ++ if writerListings opts then query hasCode elts else [] let allowframebreaks = "allowframebreaks" `elem` classes let optionslist = ["fragile" | fragile] ++ ["allowframebreaks" | allowframebreaks] let options = if null optionslist then "" else "[" ++ intercalate "," optionslist ++ "]" let slideStart = Para $ RawInline "latex" ("\\begin{frame}" ++ options) : if tit == [Str "\0"] -- marker for hrule then [] else (RawInline "latex" "{") : tit ++ [RawInline "latex" "}"] let slideEnd = RawBlock "latex" "\\end{frame}" -- now carve up slide into blocks if there are sections inside bs <- concat `fmap` mapM (elementToBeamer slideLevel) elts return $ slideStart : bs ++ [slideEnd] isListBlock :: Block -> Bool isListBlock (BulletList _) = True isListBlock (OrderedList _ _) = True isListBlock (DefinitionList _) = True isListBlock _ = False isLineBreakOrSpace :: Inline -> Bool isLineBreakOrSpace LineBreak = True isLineBreakOrSpace Space = True isLineBreakOrSpace _ = False -- | Convert Pandoc block element to LaTeX. blockToLaTeX :: Block -- ^ Block to convert -> State WriterState Doc blockToLaTeX Null = return empty blockToLaTeX (Div (identifier,classes,_) bs) = do beamer <- writerBeamer `fmap` gets stOptions ref <- toLabel identifier let linkAnchor = if null identifier then empty else "\\hyperdef{}" <> braces (text ref) <> "{}" contents <- blockListToLaTeX bs if beamer && "notes" `elem` classes -- speaker notes then return $ "\\note" <> braces contents else return (linkAnchor $$ contents) blockToLaTeX (Plain lst) = inlineListToLaTeX $ dropWhile isLineBreakOrSpace lst -- title beginning with fig: indicates that the image is a figure blockToLaTeX (Para [Image txt (src,'f':'i':'g':':':tit)]) = do inNote <- gets stInNote capt <- inlineListToLaTeX txt img <- inlineToLaTeX (Image txt (src,tit)) return $ if inNote -- can't have figures in notes then "\\begin{center}" $$ img $+$ capt $$ "\\end{center}" else "\\begin{figure}[htbp]" $$ "\\centering" $$ img $$ ("\\caption" <> braces capt) $$ "\\end{figure}" -- . . . indicates pause in beamer slides blockToLaTeX (Para [Str ".",Space,Str ".",Space,Str "."]) = do beamer <- writerBeamer `fmap` gets stOptions if beamer then blockToLaTeX (RawBlock "latex" "\\pause") else inlineListToLaTeX [Str ".",Space,Str ".",Space,Str "."] blockToLaTeX (Para lst) = inlineListToLaTeX $ dropWhile isLineBreakOrSpace lst blockToLaTeX (BlockQuote lst) = do beamer <- writerBeamer `fmap` gets stOptions case lst of [b] | beamer && isListBlock b -> do oldIncremental <- gets stIncremental modify $ \s -> s{ stIncremental = not oldIncremental } result <- blockToLaTeX b modify $ \s -> s{ stIncremental = oldIncremental } return result _ -> do oldInQuote <- gets stInQuote modify (\s -> s{stInQuote = True}) contents <- blockListToLaTeX lst modify (\s -> s{stInQuote = oldInQuote}) return $ "\\begin{quote}" $$ contents $$ "\\end{quote}" blockToLaTeX (CodeBlock (identifier,classes,keyvalAttr) str) = do opts <- gets stOptions ref <- toLabel identifier let linkAnchor = if null identifier then empty else "\\hyperdef{}" <> braces (text ref) <> braces ("\\label" <> braces (text ref)) let lhsCodeBlock = do modify $ \s -> s{ stLHS = True } return $ flush (linkAnchor $$ "\\begin{code}" $$ text str $$ "\\end{code}") $$ cr let rawCodeBlock = do st <- get env <- if stInNote st then modify (\s -> s{ stVerbInNote = True }) >> return "Verbatim" else return "verbatim" return $ flush (linkAnchor $$ text ("\\begin{" ++ env ++ "}") $$ text str $$ text ("\\end{" ++ env ++ "}")) <> cr let listingsCodeBlock = do st <- get let params = if writerListings (stOptions st) then (case getListingsLanguage classes of Just l -> [ "language=" ++ l ] Nothing -> []) ++ [ "numbers=left" | "numberLines" `elem` classes || "number" `elem` classes || "number-lines" `elem` classes ] ++ [ (if key == "startFrom" then "firstnumber" else key) ++ "=" ++ attr | (key,attr) <- keyvalAttr ] ++ (if identifier == "" then [] else [ "label=" ++ ref ]) else [] printParams | null params = empty | otherwise = brackets $ hcat (intersperse ", " (map text params)) return $ flush ("\\begin{lstlisting}" <> printParams $$ text str $$ "\\end{lstlisting}") $$ cr let highlightedCodeBlock = case highlight formatLaTeXBlock ("",classes,keyvalAttr) str of Nothing -> rawCodeBlock Just h -> modify (\st -> st{ stHighlighting = True }) >> return (flush $ linkAnchor $$ text h) case () of _ | isEnabled Ext_literate_haskell opts && "haskell" `elem` classes && "literate" `elem` classes -> lhsCodeBlock | writerListings opts -> listingsCodeBlock | writerHighlight opts && not (null classes) -> highlightedCodeBlock | otherwise -> rawCodeBlock blockToLaTeX (RawBlock f x) | f == Format "latex" || f == Format "tex" = return $ text x | otherwise = return empty blockToLaTeX (BulletList []) = return empty -- otherwise latex error blockToLaTeX (BulletList lst) = do incremental <- gets stIncremental let inc = if incremental then "[<+->]" else "" items <- mapM listItemToLaTeX lst let spacing = if isTightList lst then text "\\itemsep1pt\\parskip0pt\\parsep0pt" else empty return $ text ("\\begin{itemize}" ++ inc) $$ spacing $$ vcat items $$ "\\end{itemize}" blockToLaTeX (OrderedList _ []) = return empty -- otherwise latex error blockToLaTeX (OrderedList (start, numstyle, numdelim) lst) = do st <- get let inc = if stIncremental st then "[<+->]" else "" let oldlevel = stOLLevel st put $ st {stOLLevel = oldlevel + 1} items <- mapM listItemToLaTeX lst modify (\s -> s {stOLLevel = oldlevel}) let tostyle x = case numstyle of Decimal -> "\\arabic" <> braces x UpperRoman -> "\\Roman" <> braces x LowerRoman -> "\\roman" <> braces x UpperAlpha -> "\\Alph" <> braces x LowerAlpha -> "\\alph" <> braces x Example -> "\\arabic" <> braces x DefaultStyle -> "\\arabic" <> braces x let todelim x = case numdelim of OneParen -> x <> ")" TwoParens -> parens x Period -> x <> "." _ -> x <> "." let enum = text $ "enum" ++ map toLower (toRomanNumeral oldlevel) let stylecommand = if numstyle == DefaultStyle && numdelim == DefaultDelim then empty else "\\def" <> "\\label" <> enum <> braces (todelim $ tostyle enum) let resetcounter = if start == 1 || oldlevel > 4 then empty else "\\setcounter" <> braces enum <> braces (text $ show $ start - 1) let spacing = if isTightList lst then text "\\itemsep1pt\\parskip0pt\\parsep0pt" else empty return $ text ("\\begin{enumerate}" ++ inc) $$ stylecommand $$ resetcounter $$ spacing $$ vcat items $$ "\\end{enumerate}" blockToLaTeX (DefinitionList []) = return empty blockToLaTeX (DefinitionList lst) = do incremental <- gets stIncremental let inc = if incremental then "[<+->]" else "" items <- mapM defListItemToLaTeX lst let spacing = if all isTightList (map snd lst) then text "\\itemsep1pt\\parskip0pt\\parsep0pt" else empty return $ text ("\\begin{description}" ++ inc) $$ spacing $$ vcat items $$ "\\end{description}" blockToLaTeX HorizontalRule = return $ "\\begin{center}\\rule{0.5\\linewidth}{\\linethickness}\\end{center}" blockToLaTeX (Header level (id',classes,_) lst) = sectionHeader ("unnumbered" `elem` classes) id' level lst blockToLaTeX (Table caption aligns widths heads rows) = do headers <- if all null heads then return empty else ($$ "\\midrule\n") `fmap` (tableRowToLaTeX True aligns widths) heads let endhead = if all null heads then empty else text "\\endhead" captionText <- inlineListToLaTeX caption let capt = if isEmpty captionText then empty else text "\\caption" <> braces captionText <> "\\tabularnewline\n\\toprule\n" <> headers <> "\\endfirsthead" rows' <- mapM (tableRowToLaTeX False aligns widths) rows let colDescriptors = text $ concat $ map toColDescriptor aligns modify $ \s -> s{ stTable = True } return $ "\\begin{longtable}[c]" <> braces ("@{}" <> colDescriptors <> "@{}") -- the @{} removes extra space at beginning and end $$ capt $$ "\\toprule" $$ headers $$ endhead $$ vcat rows' $$ "\\bottomrule" $$ "\\end{longtable}" toColDescriptor :: Alignment -> String toColDescriptor align = case align of AlignLeft -> "l" AlignRight -> "r" AlignCenter -> "c" AlignDefault -> "l" blockListToLaTeX :: [Block] -> State WriterState Doc blockListToLaTeX lst = vsep `fmap` mapM blockToLaTeX lst tableRowToLaTeX :: Bool -> [Alignment] -> [Double] -> [[Block]] -> State WriterState Doc tableRowToLaTeX header aligns widths cols = do -- scale factor compensates for extra space between columns -- so the whole table isn't larger than columnwidth let scaleFactor = 0.97 ** fromIntegral (length aligns) let widths' = map (scaleFactor *) widths cells <- mapM (tableCellToLaTeX header) $ zip3 widths' aligns cols return $ hsep (intersperse "&" cells) <> "\\tabularnewline" -- For simple latex tables (without minipages or parboxes), -- we need to go to some lengths to get line breaks working: -- as LineBreak bs = \vtop{\hbox{\strut as}\hbox{\strut bs}}. fixLineBreaks :: Block -> Block fixLineBreaks (Para ils) = Para $ fixLineBreaks' ils fixLineBreaks (Plain ils) = Plain $ fixLineBreaks' ils fixLineBreaks x = x fixLineBreaks' :: [Inline] -> [Inline] fixLineBreaks' ils = case splitBy (== LineBreak) ils of [] -> [] [xs] -> xs chunks -> RawInline "tex" "\\vtop{" : concatMap tohbox chunks ++ [RawInline "tex" "}"] where tohbox ys = RawInline "tex" "\\hbox{\\strut " : ys ++ [RawInline "tex" "}"] tableCellToLaTeX :: Bool -> (Double, Alignment, [Block]) -> State WriterState Doc tableCellToLaTeX _ (0, _, blocks) = blockListToLaTeX $ walk fixLineBreaks blocks tableCellToLaTeX header (width, align, blocks) = do modify $ \st -> st{ stInMinipage = True, stNotes = [] } cellContents <- blockListToLaTeX blocks notes <- gets stNotes modify $ \st -> st{ stInMinipage = False, stNotes = [] } let valign = text $ if header then "[b]" else "[t]" let halign = case align of AlignLeft -> "\\raggedright" AlignRight -> "\\raggedleft" AlignCenter -> "\\centering" AlignDefault -> "\\raggedright" return $ ("\\begin{minipage}" <> valign <> braces (text (printf "%.2f\\columnwidth" width)) <> (halign <> "\\strut" <> cr <> cellContents <> cr) <> "\\strut\\end{minipage}") $$ case notes of [] -> empty ns -> (case length ns of n | n > 1 -> "\\addtocounter" <> braces "footnote" <> braces (text $ show $ 1 - n) | otherwise -> empty) $$ vcat (intersperse ("\\addtocounter" <> braces "footnote" <> braces "1") $ map (\x -> "\\footnotetext" <> braces x) $ reverse ns) listItemToLaTeX :: [Block] -> State WriterState Doc listItemToLaTeX lst -- we need to put some text before a header if it's the first -- element in an item. This will look ugly in LaTeX regardless, but -- this will keep the typesetter from throwing an error. | ((Header _ _ _) :_) <- lst = blockListToLaTeX lst >>= return . (text "\\item ~" $$) . (nest 2) | otherwise = blockListToLaTeX lst >>= return . (text "\\item" $$) . (nest 2) defListItemToLaTeX :: ([Inline], [[Block]]) -> State WriterState Doc defListItemToLaTeX (term, defs) = do term' <- inlineListToLaTeX term -- put braces around term if it contains an internal link, -- since otherwise we get bad bracket interactions: \item[\hyperref[..] let isInternalLink (Link _ ('#':_,_)) = True isInternalLink _ = False let term'' = if any isInternalLink term then braces term' else term' def' <- liftM vsep $ mapM blockListToLaTeX defs return $ case defs of (((Header _ _ _) : _) : _) -> "\\item" <> brackets term'' <> " ~ " $$ def' _ -> "\\item" <> brackets term'' $$ def' -- | Craft the section header, inserting the secton reference, if supplied. sectionHeader :: Bool -- True for unnumbered -> [Char] -> Int -> [Inline] -> State WriterState Doc sectionHeader unnumbered ref level lst = do txt <- inlineListToLaTeX lst lab <- text `fmap` toLabel ref let noNote (Note _) = Str "" noNote x = x let lstNoNotes = walk noNote lst txtNoNotes <- inlineListToLaTeX lstNoNotes let star = if unnumbered then text "*" else empty -- footnotes in sections don't work (except for starred variants) -- unless you specify an optional argument: -- \section[mysec]{mysec\footnote{blah}} optional <- if unnumbered || lstNoNotes == lst then return empty else do return $ brackets txtNoNotes let stuffing = star <> optional <> braces txt book <- gets stBook opts <- gets stOptions let level' = if book || writerChapters opts then level - 1 else level internalLinks <- gets stInternalLinks let refLabel x = (if ref `elem` internalLinks then text "\\hyperdef" <> braces empty <> braces lab <> braces x else x) let headerWith x y = refLabel $ text x <> y <> if null ref then empty else text "\\label" <> braces lab let sectionType = case level' of 0 | writerBeamer opts -> "part" | otherwise -> "chapter" 1 -> "section" 2 -> "subsection" 3 -> "subsubsection" 4 -> "paragraph" 5 -> "subparagraph" _ -> "" inQuote <- gets stInQuote let prefix = if inQuote && level' >= 4 then text "\\mbox{}%" -- needed for \paragraph, \subparagraph in quote environment -- see http://tex.stackexchange.com/questions/169830/ else empty return $ if level' > 5 then txt else prefix $$ headerWith ('\\':sectionType) stuffing $$ if unnumbered then "\\addcontentsline{toc}" <> braces (text sectionType) <> braces txtNoNotes else empty -- | Convert list of inline elements to LaTeX. inlineListToLaTeX :: [Inline] -- ^ Inlines to convert -> State WriterState Doc inlineListToLaTeX lst = mapM inlineToLaTeX (fixLineInitialSpaces lst) >>= return . hcat -- nonbreaking spaces (~) in LaTeX don't work after line breaks, -- so we turn nbsps after hard breaks to \hspace commands. -- this is mostly used in verse. where fixLineInitialSpaces [] = [] fixLineInitialSpaces (LineBreak : Str s@('\160':_) : xs) = LineBreak : fixNbsps s ++ fixLineInitialSpaces xs fixLineInitialSpaces (x:xs) = x : fixLineInitialSpaces xs fixNbsps s = let (ys,zs) = span (=='\160') s in replicate (length ys) hspace ++ [Str zs] hspace = RawInline "latex" "\\hspace*{0.333em}" isQuoted :: Inline -> Bool isQuoted (Quoted _ _) = True isQuoted _ = False -- | Convert inline element to LaTeX inlineToLaTeX :: Inline -- ^ Inline to convert -> State WriterState Doc inlineToLaTeX (Span (id',classes,_) ils) = do let noEmph = "csl-no-emph" `elem` classes let noStrong = "csl-no-strong" `elem` classes let noSmallCaps = "csl-no-smallcaps" `elem` classes ref <- toLabel id' let linkAnchor = if null id' then empty else "\\hyperdef{}" <> braces (text ref) <> "{}" fmap (linkAnchor <>) ((if noEmph then inCmd "textup" else id) . (if noStrong then inCmd "textnormal" else id) . (if noSmallCaps then inCmd "textnormal" else id) . (if not (noEmph || noStrong || noSmallCaps) then braces else id)) `fmap` inlineListToLaTeX ils inlineToLaTeX (Emph lst) = inlineListToLaTeX lst >>= return . inCmd "emph" inlineToLaTeX (Strong lst) = inlineListToLaTeX lst >>= return . inCmd "textbf" inlineToLaTeX (Strikeout lst) = do -- we need to protect VERB in an mbox or we get an error -- see #1294 contents <- inlineListToLaTeX $ protectCode lst modify $ \s -> s{ stStrikeout = True } return $ inCmd "sout" contents inlineToLaTeX (Superscript lst) = inlineListToLaTeX lst >>= return . inCmd "textsuperscript" inlineToLaTeX (Subscript lst) = do inlineListToLaTeX lst >>= return . inCmd "textsubscript" inlineToLaTeX (SmallCaps lst) = inlineListToLaTeX lst >>= return . inCmd "textsc" inlineToLaTeX (Cite cits lst) = do st <- get let opts = stOptions st case writerCiteMethod opts of Natbib -> citationsToNatbib cits Biblatex -> citationsToBiblatex cits _ -> inlineListToLaTeX lst inlineToLaTeX (Code (_,classes,_) str) = do opts <- gets stOptions case () of _ | writerListings opts -> listingsCode | writerHighlight opts && not (null classes) -> highlightCode | otherwise -> rawCode where listingsCode = do inNote <- gets stInNote when inNote $ modify $ \s -> s{ stVerbInNote = True } let chr = ((enumFromTo '!' '~') \\ str) !! 0 return $ text $ "\\lstinline" ++ [chr] ++ str ++ [chr] highlightCode = do case highlight formatLaTeXInline ("",classes,[]) str of Nothing -> rawCode Just h -> modify (\st -> st{ stHighlighting = True }) >> return (text h) rawCode = liftM (text . (\s -> "\\texttt{" ++ s ++ "}")) $ stringToLaTeX CodeString str inlineToLaTeX (Quoted qt lst) = do contents <- inlineListToLaTeX lst csquotes <- liftM stCsquotes get opts <- gets stOptions if csquotes then return $ "\\enquote" <> braces contents else do let s1 = if (not (null lst)) && (isQuoted (head lst)) then "\\," else empty let s2 = if (not (null lst)) && (isQuoted (last lst)) then "\\," else empty let inner = s1 <> contents <> s2 return $ case qt of DoubleQuote -> if writerTeXLigatures opts then text "``" <> inner <> text "''" else char '\x201C' <> inner <> char '\x201D' SingleQuote -> if writerTeXLigatures opts then char '`' <> inner <> char '\'' else char '\x2018' <> inner <> char '\x2019' inlineToLaTeX (Str str) = liftM text $ stringToLaTeX TextString str inlineToLaTeX (Math InlineMath str) = return $ "\\(" <> text str <> "\\)" inlineToLaTeX (Math DisplayMath str) = return $ "\\[" <> text str <> "\\]" inlineToLaTeX (RawInline f str) | f == Format "latex" || f == Format "tex" = return $ text str | otherwise = return empty inlineToLaTeX (LineBreak) = return "\\\\" inlineToLaTeX Space = return space inlineToLaTeX (Link txt ('#':ident, _)) = do contents <- inlineListToLaTeX txt lab <- toLabel ident return $ text "\\hyperref" <> brackets (text lab) <> braces contents inlineToLaTeX (Link txt (src, _)) = case txt of [Str x] | escapeURI x == src -> -- autolink do modify $ \s -> s{ stUrl = True } src' <- stringToLaTeX URLString src return $ text $ "\\url{" ++ src' ++ "}" [Str x] | Just rest <- stripPrefix "mailto:" src, escapeURI x == rest -> -- email autolink do modify $ \s -> s{ stUrl = True } src' <- stringToLaTeX URLString src contents <- inlineListToLaTeX txt return $ "\\href" <> braces (text src') <> braces ("\\nolinkurl" <> braces contents) _ -> do contents <- inlineListToLaTeX txt src' <- stringToLaTeX URLString src return $ text ("\\href{" ++ src' ++ "}{") <> contents <> char '}' inlineToLaTeX (Image _ (source, _)) = do modify $ \s -> s{ stGraphics = True } let source' = if isURI source then source else unEscapeString source source'' <- stringToLaTeX URLString source' return $ "\\includegraphics" <> braces (text source'') inlineToLaTeX (Note contents) = do inMinipage <- gets stInMinipage modify (\s -> s{stInNote = True}) contents' <- blockListToLaTeX contents modify (\s -> s {stInNote = False}) let optnl = case reverse contents of (CodeBlock _ _ : _) -> cr _ -> empty let noteContents = nest 2 contents' <> optnl opts <- gets stOptions -- in beamer slides, display footnote from current overlay forward let beamerMark = if writerBeamer opts then text "<.->" else empty modify $ \st -> st{ stNotes = noteContents : stNotes st } return $ if inMinipage then "\\footnotemark{}" -- note: a \n before } needed when note ends with a Verbatim environment else "\\footnote" <> beamerMark <> braces noteContents protectCode :: [Inline] -> [Inline] protectCode [] = [] protectCode (x@(Code ("",[],[]) _) : xs) = x : protectCode xs protectCode (x@(Code _ _) : xs) = ltx "\\mbox{" : x : ltx "}" : xs where ltx = RawInline (Format "latex") protectCode (x : xs) = x : protectCode xs citationsToNatbib :: [Citation] -> State WriterState Doc citationsToNatbib (one:[]) = citeCommand c p s k where Citation { citationId = k , citationPrefix = p , citationSuffix = s , citationMode = m } = one c = case m of AuthorInText -> "citet" SuppressAuthor -> "citeyearpar" NormalCitation -> "citep" citationsToNatbib cits | noPrefix (tail cits) && noSuffix (init cits) && ismode NormalCitation cits = citeCommand "citep" p s ks where noPrefix = all (null . citationPrefix) noSuffix = all (null . citationSuffix) ismode m = all (((==) m) . citationMode) p = citationPrefix $ head $ cits s = citationSuffix $ last $ cits ks = intercalate ", " $ map citationId cits citationsToNatbib (c:cs) | citationMode c == AuthorInText = do author <- citeCommand "citeauthor" [] [] (citationId c) cits <- citationsToNatbib (c { citationMode = SuppressAuthor } : cs) return $ author <+> cits citationsToNatbib cits = do cits' <- mapM convertOne cits return $ text "\\citetext{" <> foldl combineTwo empty cits' <> text "}" where combineTwo a b | isEmpty a = b | otherwise = a <> text "; " <> b convertOne Citation { citationId = k , citationPrefix = p , citationSuffix = s , citationMode = m } = case m of AuthorInText -> citeCommand "citealt" p s k SuppressAuthor -> citeCommand "citeyear" p s k NormalCitation -> citeCommand "citealp" p s k citeCommand :: String -> [Inline] -> [Inline] -> String -> State WriterState Doc citeCommand c p s k = do args <- citeArguments p s k return $ text ("\\" ++ c) <> args citeArguments :: [Inline] -> [Inline] -> String -> State WriterState Doc citeArguments p s k = do let s' = case s of (Str (x:[]) : r) | isPunctuation x -> dropWhile (== Space) r (Str (x:xs) : r) | isPunctuation x -> Str xs : r _ -> s pdoc <- inlineListToLaTeX p sdoc <- inlineListToLaTeX s' let optargs = case (isEmpty pdoc, isEmpty sdoc) of (True, True ) -> empty (True, False) -> brackets sdoc (_ , _ ) -> brackets pdoc <> brackets sdoc return $ optargs <> braces (text k) citationsToBiblatex :: [Citation] -> State WriterState Doc citationsToBiblatex (one:[]) = citeCommand cmd p s k where Citation { citationId = k , citationPrefix = p , citationSuffix = s , citationMode = m } = one cmd = case m of SuppressAuthor -> "autocite*" AuthorInText -> "textcite" NormalCitation -> "autocite" citationsToBiblatex (c:cs) = do args <- mapM convertOne (c:cs) return $ text cmd <> foldl (<>) empty args where cmd = case citationMode c of AuthorInText -> "\\textcites" _ -> "\\autocites" convertOne Citation { citationId = k , citationPrefix = p , citationSuffix = s } = citeArguments p s k citationsToBiblatex _ = return empty -- Determine listings language from list of class attributes. getListingsLanguage :: [String] -> Maybe String getListingsLanguage [] = Nothing getListingsLanguage (x:xs) = toListingsLanguage x <|> getListingsLanguage xs