/
LaTeX.hs
1727 lines (1660 loc) · 73.8 KB
/
LaTeX.hs
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{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PatternGuards #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE ViewPatterns #-}
{- |
Module : Text.Pandoc.Writers.LaTeX
Copyright : Copyright (C) 2006-2020 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Conversion of 'Pandoc' format into LaTeX.
-}
module Text.Pandoc.Writers.LaTeX (
writeLaTeX
, writeBeamer
) where
import Control.Applicative ((<|>))
import Control.Monad.State.Strict
import Data.Monoid (Any(..))
import Data.Char (isAlphaNum, isAscii, isDigit, isLetter, isSpace,
isPunctuation, ord)
import Data.List (foldl', intersperse, nubBy, (\\), uncons)
import Data.Maybe (catMaybes, fromMaybe, isJust, mapMaybe, isNothing)
import qualified Data.Map as M
import Data.Text (Text)
import qualified Data.Text as T
import Network.URI (unEscapeString)
import Text.DocTemplates (FromContext(lookupContext), renderTemplate,
Val(..), Context(..))
import Text.Pandoc.BCP47 (Lang (..), getLang, renderLang)
import Text.Pandoc.Class.PandocMonad (PandocMonad, report, toLang)
import Text.Pandoc.Definition
import Text.Pandoc.Highlighting (formatLaTeXBlock, formatLaTeXInline, highlight,
styleToLaTeX, toListingsLanguage)
import Text.Pandoc.ImageSize
import Text.Pandoc.Logging
import Text.Pandoc.Options
import Text.DocLayout
import Text.Pandoc.Shared
import Text.Pandoc.Slides
import Text.Pandoc.Walk
import Text.Pandoc.Writers.Shared
import Text.Printf (printf)
import qualified Data.Text.Normalize as Normalize
data WriterState =
WriterState { stInNote :: Bool -- true if we're in a note
, stInQuote :: Bool -- true if in a blockquote
, stExternalNotes :: Bool -- true if in context where
-- we need to store footnotes
, stInMinipage :: Bool -- true if in minipage
, stInHeading :: Bool -- true if in a section heading
, stInItem :: Bool -- true if in \item[..]
, stNotes :: [Doc Text] -- 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
, stHasChapters :: Bool -- true if document has chapters
, 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 :: [Text] -- list of internal link targets
, stBeamer :: Bool -- produce beamer
, stEmptyLine :: Bool -- true if no content on line
, stHasCslRefs :: Bool -- has a Div with class refs
, stCslHangingIndent :: Bool -- use hanging indent for bib
}
startingState :: WriterOptions -> WriterState
startingState options = WriterState {
stInNote = False
, stInQuote = False
, stExternalNotes = False
, stInHeading = False
, stInMinipage = False
, stInItem = False
, stNotes = []
, stOLLevel = 1
, stOptions = options
, stVerbInNote = False
, stTable = False
, stStrikeout = False
, stUrl = False
, stGraphics = False
, stLHS = False
, stHasChapters = case writerTopLevelDivision options of
TopLevelPart -> True
TopLevelChapter -> True
_ -> False
, stCsquotes = False
, stHighlighting = False
, stIncremental = writerIncremental options
, stInternalLinks = []
, stBeamer = False
, stEmptyLine = True
, stHasCslRefs = False
, stCslHangingIndent = False }
-- | Convert Pandoc to LaTeX.
writeLaTeX :: PandocMonad m => WriterOptions -> Pandoc -> m Text
writeLaTeX options document =
evalStateT (pandocToLaTeX options document) $
startingState options
-- | Convert Pandoc to LaTeX Beamer.
writeBeamer :: PandocMonad m => WriterOptions -> Pandoc -> m Text
writeBeamer options document =
evalStateT (pandocToLaTeX options document) $
(startingState options){ stBeamer = True }
type LW m = StateT WriterState m
pandocToLaTeX :: PandocMonad m
=> WriterOptions -> Pandoc -> LW m Text
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 ("refs",_,_) _:xs -> reverse xs
_ -> blocks
else blocks
-- see if there are internal links
let isInternalLink (Link _ _ (s,_))
| Just ('#', xs) <- T.uncons s = [xs]
isInternalLink _ = []
modify $ \s -> s{ stInternalLinks = query isInternalLink blocks' }
let colwidth = if writerWrapText options == WrapAuto
then Just $ writerColumns options
else Nothing
metadata <- metaToContext options
blockListToLaTeX
(fmap chomp . inlineListToLaTeX)
meta
let chaptersClasses = ["memoir","book","report","scrreprt","scrbook","extreport","extbook","tufte-book"]
let frontmatterClasses = ["memoir","book","scrbook","extbook","tufte-book"]
-- these have \frontmatter etc.
beamer <- gets stBeamer
let documentClass =
case lookupContext "documentclass" (writerVariables options) `mplus`
(stringify <$> lookupMeta "documentclass" meta) of
Just x -> x
Nothing | beamer -> "beamer"
| otherwise -> case writerTopLevelDivision options of
TopLevelPart -> "book"
TopLevelChapter -> "book"
_ -> "article"
when (documentClass `elem` chaptersClasses) $
modify $ \s -> s{ stHasChapters = True }
case lookupContext "csquotes" (writerVariables options) `mplus`
(stringify <$> lookupMeta "csquotes" meta) of
Nothing -> return ()
Just "false" -> return ()
Just _ -> modify $ \s -> s{stCsquotes = True}
let (blocks'', lastHeader) = if writerCiteMethod options == Citeproc then
(blocks', [])
else case reverse blocks' of
Header 1 _ il : _ -> (init blocks', il)
_ -> (blocks', [])
blocks''' <- if beamer
then toSlides blocks''
else return $ makeSections False Nothing blocks''
main <- blockListToLaTeX blocks'''
biblioTitle <- inlineListToLaTeX lastHeader
st <- get
titleMeta <- stringToLaTeX TextString $ stringify $ docTitle meta
authorsMeta <- mapM (stringToLaTeX TextString . stringify) $ docAuthors meta
docLangs <- catMaybes <$>
mapM (toLang . Just) (ordNub (query (extract "lang") blocks))
let hasStringValue x = isJust (getField x metadata :: Maybe (Doc Text))
let geometryFromMargins = mconcat $ intersperse ("," :: Doc Text) $
mapMaybe (\(x,y) ->
((x <> "=") <>) <$> getField y metadata)
[("lmargin","margin-left")
,("rmargin","margin-right")
,("tmargin","margin-top")
,("bmargin","margin-bottom")
]
let toPolyObj :: Lang -> Val Text
toPolyObj lang = MapVal $ Context $
M.fromList [ ("name" , SimpleVal $ literal name)
, ("options" , SimpleVal $ literal opts) ]
where
(name, opts) = toPolyglossia lang
mblang <- toLang $ case getLang options meta of
Just l -> Just l
Nothing | null docLangs -> Nothing
| otherwise -> Just "en"
-- we need a default here since lang is used in template conditionals
let dirs = query (extract "dir") blocks
let context = defField "toc" (writerTableOfContents options) $
defField "toc-depth" (tshow
(writerTOCDepth options -
if stHasChapters st
then 1
else 0)) $
defField "body" main $
defField "title-meta" titleMeta $
defField "author-meta"
(T.intercalate "; " authorsMeta) $
defField "documentclass" documentClass $
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 "has-chapters" (stHasChapters st) $
defField "has-frontmatter" (documentClass `elem` frontmatterClasses) $
defField "listings" (writerListings options || stLHS st) $
defField "beamer" beamer $
(if stHighlighting st
then case writerHighlightStyle options of
Just sty ->
defField "highlighting-macros"
(T.stripEnd $ styleToLaTeX sty)
Nothing -> id
else id) $
(case writerCiteMethod options of
Natbib -> defField "biblio-title" biblioTitle .
defField "natbib" True
Biblatex -> defField "biblio-title" biblioTitle .
defField "biblatex" True
_ -> id) $
defField "colorlinks" (any hasStringValue
["citecolor", "urlcolor", "linkcolor", "toccolor",
"filecolor"]) $
(if null dirs
then id
else defField "dir" ("ltr" :: Text)) $
defField "section-titles" True $
defField "csl-refs" (stHasCslRefs st) $
defField "csl-hanging-indent" (stCslHangingIndent st) $
defField "geometry" geometryFromMargins $
(case T.uncons . render Nothing <$>
getField "papersize" metadata of
-- uppercase a4, a5, etc.
Just (Just ('A', ds))
| not (T.null ds) && T.all isDigit ds
-> resetField "papersize" ("a" <> ds)
_ -> id)
metadata
let context' =
-- note: lang is used in some conditionals in the template,
-- so we need to set it if we have any babel/polyglossia:
maybe id (\l -> defField "lang"
(literal $ renderLang l)) mblang
$ maybe id (\l -> defField "babel-lang"
(literal $ toBabel l)) mblang
$ defField "babel-otherlangs"
(map (literal . toBabel) docLangs)
$ defField "babel-newcommands" (vcat $
map (\(poly, babel) -> literal $
-- \textspanish and \textgalician are already used by babel
-- save them as \oritext... and let babel use that
if poly `elem` ["spanish", "galician"]
then "\\let\\oritext" <> poly <> "\\text" <> poly <> "\n" <>
"\\AddBabelHook{" <> poly <> "}{beforeextras}" <>
"{\\renewcommand{\\text" <> poly <> "}{\\oritext"
<> poly <> "}}\n" <>
"\\AddBabelHook{" <> poly <> "}{afterextras}" <>
"{\\renewcommand{\\text" <> poly <> "}[2][]{\\foreignlanguage{"
<> poly <> "}{##2}}}"
else (if poly == "latin" -- see #4161
then "\\providecommand{\\textlatin}{}\n\\renewcommand"
else "\\newcommand") <> "{\\text" <> poly <>
"}[2][]{\\foreignlanguage{" <> babel <> "}{#2}}\n" <>
"\\newenvironment{" <> poly <>
"}[2][]{\\begin{otherlanguage}{" <>
babel <> "}}{\\end{otherlanguage}}"
)
-- eliminate duplicates that have same polyglossia name
$ nubBy (\a b -> fst a == fst b)
-- find polyglossia and babel names of languages used in the document
$ map (\l -> (fst $ toPolyglossia l, toBabel l)) docLangs
)
$ maybe id (defField "polyglossia-lang" . toPolyObj) mblang
$ defField "polyglossia-otherlangs"
(ListVal (map toPolyObj docLangs :: [Val Text]))
$
defField "latex-dir-rtl"
((render Nothing <$> getField "dir" context) ==
Just ("rtl" :: Text)) context
return $ render colwidth $
case writerTemplate options of
Nothing -> main
Just tpl -> renderTemplate tpl context'
data StringContext = TextString
| URLString
| CodeString
deriving (Eq)
-- escape things as needed for LaTeX
stringToLaTeX :: PandocMonad m => StringContext -> Text -> LW m Text
stringToLaTeX context zs = do
opts <- gets stOptions
return $ T.pack $
foldr (go opts context) mempty $ T.unpack $
if writerPreferAscii opts
then Normalize.normalize Normalize.NFD zs
else zs
where
go :: WriterOptions -> StringContext -> Char -> String -> String
go opts ctx x xs =
let ligatures = isEnabled Ext_smart opts && ctx == TextString
isUrl = ctx == URLString
mbAccentCmd =
if writerPreferAscii opts && ctx == TextString
then uncons xs >>= \(c,_) -> M.lookup c accents
else Nothing
emits s =
case mbAccentCmd of
Just cmd ->
cmd <> "{" <> s <> "}" <> drop 1 xs -- drop combining accent
Nothing -> s <> xs
emitc c =
case mbAccentCmd of
Just cmd ->
cmd <> "{" <> [c] <> "}" <> drop 1 xs -- drop combining accent
Nothing -> c : xs
emitcseq cs =
case xs of
c:_ | isLetter c
, ctx == TextString
-> cs <> " " <> xs
| isSpace c -> cs <> "{}" <> xs
| ctx == TextString
-> cs <> xs
_ -> cs <> "{}" <> xs
emitquote cs =
case xs of
'`':_ -> cs <> "\\," <> xs -- add thin space
'\'':_ -> cs <> "\\," <> xs -- add thin space
_ -> cs <> xs
in case x of
'?' | ligatures -> -- avoid ?` ligature
case xs of
'`':_ -> emits "?{}"
_ -> emitc x
'!' | ligatures -> -- avoid !` ligature
case xs of
'`':_ -> emits "!{}"
_ -> emitc x
'{' -> emits "\\{"
'}' -> emits "\\}"
'`' | ctx == CodeString -> emitcseq "\\textasciigrave"
'$' | not isUrl -> emits "\\$"
'%' -> emits "\\%"
'&' -> emits "\\&"
'_' | not isUrl -> emits "\\_"
'#' -> emits "\\#"
'-' | not isUrl -> case xs of
-- prevent adjacent hyphens from forming ligatures
('-':_) -> emits "-\\/"
_ -> emitc '-'
'~' | not isUrl -> emitcseq "\\textasciitilde"
'^' -> emits "\\^{}"
'\\'| isUrl -> emitc '/' -- NB. / works as path sep even on Windows
| otherwise -> emitcseq "\\textbackslash"
'|' | not isUrl -> emitcseq "\\textbar"
'<' -> emitcseq "\\textless"
'>' -> emitcseq "\\textgreater"
'[' -> emits "{[}" -- to avoid interpretation as
']' -> emits "{]}" -- optional arguments
'\'' | ctx == CodeString -> emitcseq "\\textquotesingle"
'\160' -> emits "~"
'\x200B' -> emits "\\hspace{0pt}" -- zero-width space
'\x202F' -> emits "\\,"
'\x2026' -> emitcseq "\\ldots"
'\x2018' | ligatures -> emitquote "`"
'\x2019' | ligatures -> emitquote "'"
'\x201C' | ligatures -> emitquote "``"
'\x201D' | ligatures -> emitquote "''"
'\x2014' | ligatures -> emits "---"
'\x2013' | ligatures -> emits "--"
_ | writerPreferAscii opts
-> case x of
'ı' -> emitcseq "\\i"
'ȷ' -> emitcseq "\\j"
'å' -> emitcseq "\\aa"
'Å' -> emitcseq "\\AA"
'ß' -> emitcseq "\\ss"
'ø' -> emitcseq "\\o"
'Ø' -> emitcseq "\\O"
'Ł' -> emitcseq "\\L"
'ł' -> emitcseq "\\l"
'æ' -> emitcseq "\\ae"
'Æ' -> emitcseq "\\AE"
'œ' -> emitcseq "\\oe"
'Œ' -> emitcseq "\\OE"
'£' -> emitcseq "\\pounds"
'€' -> emitcseq "\\euro"
'©' -> emitcseq "\\copyright"
_ -> emitc x
| otherwise -> emitc x
accents :: M.Map Char String
accents = M.fromList
[ ('\779' , "\\H")
, ('\768' , "\\`")
, ('\769' , "\\'")
, ('\770' , "\\^")
, ('\771' , "\\~")
, ('\776' , "\\\"")
, ('\775' , "\\.")
, ('\772' , "\\=")
, ('\781' , "\\|")
, ('\817' , "\\b")
, ('\807' , "\\c")
, ('\783' , "\\G")
, ('\777' , "\\h")
, ('\803' , "\\d")
, ('\785' , "\\f")
, ('\778' , "\\r")
, ('\865' , "\\t")
, ('\782' , "\\U")
, ('\780' , "\\v")
, ('\774' , "\\u")
, ('\808' , "\\k")
, ('\785' , "\\newtie")
, ('\8413', "\\textcircled")
]
toLabel :: PandocMonad m => Text -> LW m Text
toLabel z = go `fmap` stringToLaTeX URLString z
where
go = T.concatMap $ \x -> case x of
_ | (isLetter x || isDigit x) && isAscii x -> T.singleton x
| x `elemText` "_-+=:;." -> T.singleton x
| otherwise -> T.pack $ "ux" <> printf "%x" (ord x)
-- | Puts contents into LaTeX command.
inCmd :: Text -> Doc Text -> Doc Text
inCmd cmd contents = char '\\' <> literal cmd <> braces contents
toSlides :: PandocMonad m => [Block] -> LW m [Block]
toSlides bs = do
opts <- gets stOptions
let slideLevel = fromMaybe (getSlideLevel bs) $ writerSlideLevel opts
let bs' = prepSlides slideLevel bs
walkM (elementToBeamer slideLevel) $ makeSections False Nothing bs'
-- this creates section slides and marks slides with class "slide","block"
elementToBeamer :: PandocMonad m => Int -> Block -> LW m Block
elementToBeamer slideLevel (Div (ident,"section":dclasses,dkvs)
xs@(h@(Header lvl _ _) : ys))
| lvl > slideLevel
= return $ Div (ident,"block":dclasses,dkvs) xs
| lvl < slideLevel
= do let isSlide (Div (_,"slide":_,_) _) = True
isSlide (Div (_,"section":_,_) _) = True
isSlide _ = False
let (titleBs, slideBs) = break isSlide ys
return $
if null titleBs
then Div (ident,"section":dclasses,dkvs) xs
else Div (ident,"section":dclasses,dkvs)
(h : Div ("","slide":dclasses,dkvs) (h:titleBs) : slideBs)
| otherwise
= return $ Div (ident,"slide":dclasses,dkvs) xs
elementToBeamer _ x = return x
isListBlock :: Block -> Bool
isListBlock (BulletList _) = True
isListBlock (OrderedList _ _) = True
isListBlock (DefinitionList _) = True
isListBlock _ = False
-- | Convert Pandoc block element to LaTeX.
blockToLaTeX :: PandocMonad m
=> Block -- ^ Block to convert
-> LW m (Doc Text)
blockToLaTeX Null = return empty
blockToLaTeX (Div attr@(identifier,"block":_,_) (Header _ _ ils : bs)) = do
ref <- toLabel identifier
let anchor = if T.null identifier
then empty
else cr <> "\\protect\\hypertarget" <>
braces (literal ref) <> braces empty
title' <- inlineListToLaTeX ils
contents <- blockListToLaTeX bs
wrapDiv attr $ ("\\begin{block}" <> braces title' <> anchor) $$
contents $$ "\\end{block}"
blockToLaTeX (Div (identifier,"slide":dclasses,dkvs)
(Header _ (_,hclasses,hkvs) ils : bs)) = do
-- note: [fragile] is required or verbatim breaks
let hasCodeBlock (CodeBlock _ _) = [True]
hasCodeBlock _ = []
let hasCode (Code _ _) = [True]
hasCode _ = []
let classes = ordNub $ dclasses ++ hclasses
let kvs = ordNub $ dkvs ++ hkvs
let fragile = "fragile" `elem` classes ||
not (null $ query hasCodeBlock bs ++ query hasCode bs)
let frameoptions = ["allowdisplaybreaks", "allowframebreaks", "fragile",
"b", "c", "t", "environment",
"label", "plain", "shrink", "standout",
"noframenumbering"]
let optionslist = ["fragile" | fragile
, isNothing (lookup "fragile" kvs)
, "fragile" `notElem` classes] ++
[k | k <- classes, k `elem` frameoptions] ++
[k <> "=" <> v | (k,v) <- kvs, k `elem` frameoptions]
let options = if null optionslist
then empty
else brackets (literal (T.intercalate "," optionslist))
slideTitle <- if ils == [Str "\0"] -- marker for hrule
then return empty
else braces <$> inlineListToLaTeX ils
ref <- toLabel identifier
let slideAnchor = if T.null identifier
then empty
else cr <> "\\protect\\hypertarget" <>
braces (literal ref) <> braces empty
contents <- blockListToLaTeX bs >>= wrapDiv (identifier,classes,kvs)
return $ ("\\begin{frame}" <> options <> slideTitle <> slideAnchor) $$
contents $$ "\\end{frame}"
blockToLaTeX (Div (identifier@(T.uncons -> Just (_,_)),dclasses,dkvs)
(Header lvl ("",hclasses,hkvs) ils : bs)) =
-- move identifier from div to header
blockToLaTeX (Div ("",dclasses,dkvs)
(Header lvl (identifier,hclasses,hkvs) ils : bs))
blockToLaTeX (Div (identifier,classes,kvs) bs) = do
beamer <- gets stBeamer
oldIncremental <- gets stIncremental
if beamer && "incremental" `elem` classes
then modify $ \st -> st{ stIncremental = True }
else when (beamer && "nonincremental" `elem` classes) $
modify $ \st -> st { stIncremental = False }
result <- if identifier == "refs"
then do
inner <- blockListToLaTeX bs
modify $ \st -> st{ stHasCslRefs = True
, stCslHangingIndent =
"hanging-indent" `elem` classes }
return $ "\\begin{cslreferences}" $$
inner $$
"\\end{cslreferences}"
else blockListToLaTeX bs
modify $ \st -> st{ stIncremental = oldIncremental }
linkAnchor' <- hypertarget True identifier empty
-- see #2704 for the motivation for adding \leavevmode:
let linkAnchor =
case bs of
Para _ : _
| not (isEmpty linkAnchor')
-> "\\leavevmode" <> linkAnchor' <> "%"
_ -> linkAnchor'
wrapNotes txt = if beamer && "notes" `elem` classes
then "\\note" <> braces txt -- speaker notes
else linkAnchor $$ txt
wrapNotes <$> wrapDiv (identifier,classes,kvs) result
blockToLaTeX (Plain lst) =
inlineListToLaTeX lst
-- title beginning with fig: indicates that the image is a figure
blockToLaTeX (Para [Image attr@(ident, _, _) txt (src,tgt)])
| Just tit <- T.stripPrefix "fig:" tgt
= do
(capt, captForLof, footnotes) <- getCaption True txt
lab <- labelFor ident
let caption = "\\caption" <> captForLof <> braces capt <> lab
img <- inlineToLaTeX (Image attr txt (src,tit))
innards <- hypertarget True ident $
"\\centering" $$ img $$ caption <> cr
let figure = cr <> "\\begin{figure}" $$ innards $$ "\\end{figure}"
st <- get
return $ (if stInMinipage st
-- can't have figures in notes or minipage (here, table cell)
-- http://www.tex.ac.uk/FAQ-ouparmd.html
then cr <> "\\begin{center}" $$ img $+$ capt $$
"\\end{center}"
else figure) $$ footnotes
-- . . . indicates pause in beamer slides
blockToLaTeX (Para [Str ".",Space,Str ".",Space,Str "."]) = do
beamer <- gets stBeamer
if beamer
then blockToLaTeX (RawBlock "latex" "\\pause")
else inlineListToLaTeX [Str ".",Space,Str ".",Space,Str "."]
blockToLaTeX (Para lst) =
inlineListToLaTeX lst
blockToLaTeX (LineBlock lns) =
blockToLaTeX $ linesToPara lns
blockToLaTeX (BlockQuote lst) = do
beamer <- gets stBeamer
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
lab <- labelFor identifier
linkAnchor' <- hypertarget True identifier lab
let linkAnchor = if isEmpty linkAnchor'
then empty
else linkAnchor' <> "%"
let lhsCodeBlock = do
modify $ \s -> s{ stLHS = True }
return $ flush (linkAnchor $$ "\\begin{code}" $$ literal 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 $$ literal ("\\begin{" <> env <> "}") $$
literal str $$ literal ("\\end{" <> env <> "}")) <> cr
let listingsCodeBlock = do
st <- get
ref <- toLabel identifier
let params = if writerListings (stOptions st)
then (case getListingsLanguage classes of
Just l -> [ "language=" <> mbBraced l ]
Nothing -> []) ++
[ "numbers=left" | "numberLines" `elem` classes
|| "number" `elem` classes
|| "number-lines" `elem` classes ] ++
[ (if key == "startFrom"
then "firstnumber"
else key) <> "=" <> mbBraced attr |
(key,attr) <- keyvalAttr,
key `notElem` ["exports", "tangle", "results"]
-- see #4889
] ++
["label=" <> ref | not (T.null identifier)]
else []
printParams
| null params = empty
| otherwise = brackets $ hcat (intersperse ", "
(map literal params))
return $ flush ("\\begin{lstlisting}" <> printParams $$ literal str $$
"\\end{lstlisting}") $$ cr
let highlightedCodeBlock =
case highlight (writerSyntaxMap opts)
formatLaTeXBlock ("",classes,keyvalAttr) str of
Left msg -> do
unless (T.null msg) $
report $ CouldNotHighlight msg
rawCodeBlock
Right h -> do
st <- get
when (stInNote st) $ modify (\s -> s{ stVerbInNote = True })
modify (\s -> s{ stHighlighting = True })
return (flush $ linkAnchor $$ text (T.unpack h))
case () of
_ | isEnabled Ext_literate_haskell opts && "haskell" `elem` classes &&
"literate" `elem` classes -> lhsCodeBlock
| writerListings opts -> listingsCodeBlock
| not (null classes) && isJust (writerHighlightStyle opts)
-> highlightedCodeBlock
| otherwise -> rawCodeBlock
blockToLaTeX b@(RawBlock f x) = do
beamer <- gets stBeamer
if f == Format "latex" || f == Format "tex" ||
(f == Format "beamer" && beamer)
then return $ literal x
else do
report $ BlockNotRendered b
return empty
blockToLaTeX (BulletList []) = return empty -- otherwise latex error
blockToLaTeX (BulletList lst) = do
incremental <- gets stIncremental
beamer <- gets stBeamer
let inc = if beamer && incremental then "[<+->]" else ""
items <- mapM listItemToLaTeX lst
let spacing = if isTightList lst
then text "\\tightlist"
else empty
return $ text ("\\begin{itemize}" <> inc) $$ spacing $$ vcat items $$
"\\end{itemize}"
blockToLaTeX (OrderedList _ []) = return empty -- otherwise latex error
blockToLaTeX (OrderedList (start, numstyle, numdelim) lst) = do
st <- get
let inc = if stBeamer st && stIncremental st then "[<+->]" else ""
let oldlevel = stOLLevel st
put $ st {stOLLevel = oldlevel + 1}
items <- mapM listItemToLaTeX lst
modify (\s -> s {stOLLevel = oldlevel})
let beamer = stBeamer st
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 exemplar = case numstyle of
Decimal -> "1"
UpperRoman -> "I"
LowerRoman -> "i"
UpperAlpha -> "A"
LowerAlpha -> "a"
Example -> "1"
DefaultStyle -> "1"
let enum = literal $ "enum" <> T.toLower (toRomanNumeral oldlevel)
let stylecommand
| numstyle == DefaultStyle && numdelim == DefaultDelim = empty
| beamer && numstyle == Decimal && numdelim == Period = empty
| beamer = brackets (todelim exemplar)
| otherwise = "\\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 "\\tightlist"
else empty
return $ text ("\\begin{enumerate}" <> inc)
$$ stylecommand
$$ resetcounter
$$ spacing
$$ vcat items
$$ "\\end{enumerate}"
blockToLaTeX (DefinitionList []) = return empty
blockToLaTeX (DefinitionList lst) = do
incremental <- gets stIncremental
beamer <- gets stBeamer
let inc = if beamer && incremental then "[<+->]" else ""
items <- mapM defListItemToLaTeX lst
let spacing = if all (isTightList . snd) lst
then text "\\tightlist"
else empty
return $ text ("\\begin{description}" <> inc) $$ spacing $$ vcat items $$
"\\end{description}"
blockToLaTeX HorizontalRule =
return
"\\begin{center}\\rule{0.5\\linewidth}{0.5pt}\\end{center}"
blockToLaTeX (Header level (id',classes,_) lst) = do
modify $ \s -> s{stInHeading = True}
hdr <- sectionHeader classes id' level lst
modify $ \s -> s{stInHeading = False}
return hdr
blockToLaTeX (Table _ blkCapt specs thead tbody tfoot) = do
let (caption, aligns, widths, heads, rows) = toLegacyTable blkCapt specs thead tbody tfoot
(captionText, captForLof, captNotes) <- getCaption False caption
let toHeaders hs = do contents <- tableRowToLaTeX True aligns widths hs
return ("\\toprule" $$ contents $$ "\\midrule")
let removeNote (Note _) = Span ("", [], []) []
removeNote x = x
firsthead <- if isEmpty captionText || all null heads
then return empty
else ($$ text "\\endfirsthead") <$> toHeaders heads
head' <- if all null heads
then return "\\toprule"
-- avoid duplicate notes in head and firsthead:
else toHeaders (if isEmpty firsthead
then heads
else walk removeNote heads)
let capt = if isEmpty captionText
then empty
else "\\caption" <> captForLof <> braces captionText
<> "\\tabularnewline"
rows' <- mapM (tableRowToLaTeX False aligns widths) rows
let colDescriptors = literal $ T.concat $ map toColDescriptor aligns
modify $ \s -> s{ stTable = True }
notes <- notesToLaTeX <$> gets stNotes
return $ "\\begin{longtable}[]" <>
braces ("@{}" <> colDescriptors <> "@{}")
-- the @{} removes extra space at beginning and end
$$ capt
$$ firsthead
$$ head'
$$ "\\endhead"
$$ vcat rows'
$$ "\\bottomrule"
$$ "\\end{longtable}"
$$ captNotes
$$ notes
getCaption :: PandocMonad m
=> Bool -> [Inline] -> LW m (Doc Text, Doc Text, Doc Text)
getCaption externalNotes txt = do
oldExternalNotes <- gets stExternalNotes
modify $ \st -> st{ stExternalNotes = externalNotes, stNotes = [] }
capt <- inlineListToLaTeX txt
footnotes <- if externalNotes
then notesToLaTeX <$> gets stNotes
else return empty
modify $ \st -> st{ stExternalNotes = oldExternalNotes, stNotes = [] }
-- We can't have footnotes in the list of figures/tables, so remove them:
let getNote (Note _) = Any True
getNote _ = Any False
let hasNotes = getAny . query getNote
captForLof <- if hasNotes txt
then brackets <$> inlineListToLaTeX (walk deNote txt)
else return empty
return (capt, captForLof, footnotes)
toColDescriptor :: Alignment -> Text
toColDescriptor align =
case align of
AlignLeft -> "l"
AlignRight -> "r"
AlignCenter -> "c"
AlignDefault -> "l"
blockListToLaTeX :: PandocMonad m => [Block] -> LW m (Doc Text)
blockListToLaTeX lst =
vsep `fmap` mapM (\b -> setEmptyLine True >> blockToLaTeX b) lst
tableRowToLaTeX :: PandocMonad m
=> Bool
-> [Alignment]
-> [Double]
-> [[Block]]
-> LW m (Doc Text)
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 isSimple [Plain _] = True
isSimple [Para _] = True
isSimple [] = True
isSimple _ = False
-- simple tables have to have simple cells:
let widths' = if all (== 0) widths && not (all isSimple cols)
then replicate (length aligns)
(scaleFactor / fromIntegral (length aligns))
else 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" "}"]
-- We also change display math to inline math, since display
-- math breaks in simple tables.
displayMathToInline :: Inline -> Inline
displayMathToInline (Math DisplayMath x) = Math InlineMath x
displayMathToInline x = x
tableCellToLaTeX :: PandocMonad m => Bool -> (Double, Alignment, [Block])
-> LW m (Doc Text)
tableCellToLaTeX _ (0, _, blocks) =
blockListToLaTeX $ walk fixLineBreaks $ walk displayMathToInline blocks
tableCellToLaTeX header (width, align, blocks) = do
beamer <- gets stBeamer
externalNotes <- gets stExternalNotes
inMinipage <- gets stInMinipage
-- See #5367 -- footnotehyper/footnote don't work in beamer,
-- so we need to produce the notes outside the table...
modify $ \st -> st{ stExternalNotes = beamer,
stInMinipage = True }
cellContents <- blockListToLaTeX blocks
modify $ \st -> st{ stExternalNotes = externalNotes,
stInMinipage = inMinipage }
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 <> cr <> cellContents <> "\\strut" <> cr <>
"\\end{minipage}"
notesToLaTeX :: [Doc Text] -> Doc Text
notesToLaTeX [] = empty
notesToLaTeX ns = (case length ns of
n | n > 1 -> "\\addtocounter" <>
braces "footnote" <>
braces (text $ show $ 1 - n)
| otherwise -> empty)
$$
vcat (intersperse
("\\addtocounter" <> braces "footnote" <> braces "1")
$ map (\x -> "\\footnotetext" <> braces x)
$ reverse ns)
listItemToLaTeX :: PandocMonad m => [Block] -> LW m (Doc Text)
listItemToLaTeX lst
-- we need to put some text before a header if it's the first
-- element in an item. This will look ugly in LaTeX regardless, but
-- this will keep the typesetter from throwing an error.
| (Header{} :_) <- lst =
(text "\\item ~" $$) . nest 2 <$> blockListToLaTeX lst
| Plain (Str "☐":Space:is) : bs <- lst = taskListItem False is bs
| Plain (Str "☒":Space:is) : bs <- lst = taskListItem True is bs
| Para (Str "☐":Space:is) : bs <- lst = taskListItem False is bs
| Para (Str "☒":Space:is) : bs <- lst = taskListItem True is bs
| otherwise = (text "\\item" $$) . nest 2 <$> blockListToLaTeX lst
where
taskListItem checked is bs = do
let checkbox = if checked
then "$\\boxtimes$"
else "$\\square$"
isContents <- inlineListToLaTeX is
bsContents <- blockListToLaTeX bs
return $ "\\item" <> brackets checkbox
$$ nest 2 (isContents $+$ bsContents)
defListItemToLaTeX :: PandocMonad m => ([Inline], [[Block]]) -> LW m (Doc Text)
defListItemToLaTeX (term, defs) = do
-- needed to turn off 'listings' because it breaks inside \item[...]:
modify $ \s -> s{stInItem = True}
term' <- inlineListToLaTeX term
modify $ \s -> s{stInItem = False}
-- put braces around term if it contains an internal link,
-- since otherwise we get bad bracket interactions: \item[\hyperref[..]
let isInternalLink (Link _ _ (src,_))
| Just ('#', _) <- T.uncons src = 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'' <> " ~ " $$ def'
((CodeBlock{} : _) : _) -> -- see #4662
"\\item" <> brackets term'' <> " ~ " $$ def'
_ ->
"\\item" <> brackets term'' $$ def'
-- | Craft the section header, inserting the secton reference, if supplied.
sectionHeader :: PandocMonad m
=> [Text] -- classes
-> Text
-> Int
-> [Inline]
-> LW m (Doc Text)
sectionHeader classes ident level lst = do
let unnumbered = "unnumbered" `elem` classes
let unlisted = "unlisted" `elem` classes
txt <- inlineListToLaTeX lst
plain <- stringToLaTeX TextString $ T.concat $ map stringify lst
let removeInvalidInline (Note _) = []
removeInvalidInline (Span (id', _, _) _) | not (T.null id') = []
removeInvalidInline Image{} = []
removeInvalidInline x = [x]
let lstNoNotes = foldr (mappend . (\x -> walkM removeInvalidInline x)) mempty lst
txtNoNotes <- inlineListToLaTeX lstNoNotes
-- 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 || null lstNoNotes
then return empty
else
return $ brackets txtNoNotes
let contents = if render Nothing txt == plain
then braces txt
else braces (text "\\texorpdfstring"
<> braces txt
<> braces (literal plain))
book <- gets stHasChapters
opts <- gets stOptions
let topLevelDivision = if book && writerTopLevelDivision opts == TopLevelDefault
then TopLevelChapter
else writerTopLevelDivision opts
beamer <- gets stBeamer
let level' = if beamer &&
topLevelDivision `elem` [TopLevelPart, TopLevelChapter]
-- beamer has parts but no chapters
then if level == 1 then -1 else level - 1
else case topLevelDivision of