diff options
Diffstat (limited to 'src/Text/Pandoc/Readers/LaTeX/Macro.hs')
| -rw-r--r-- | src/Text/Pandoc/Readers/LaTeX/Macro.hs | 100 |
1 files changed, 58 insertions, 42 deletions
diff --git a/src/Text/Pandoc/Readers/LaTeX/Macro.hs b/src/Text/Pandoc/Readers/LaTeX/Macro.hs index 6a7b0eed3..5709cbb8c 100644 --- a/src/Text/Pandoc/Readers/LaTeX/Macro.hs +++ b/src/Text/Pandoc/Readers/LaTeX/Macro.hs @@ -15,6 +15,8 @@ import Control.Applicative ((<|>), optional) import qualified Data.Map as M import Data.Text (Text) import qualified Data.Text as T +import qualified Data.List.NonEmpty as NonEmpty +import Data.List.NonEmpty (NonEmpty(..)) macroDef :: (PandocMonad m, Monoid a) => (Text -> a) -> LP m a macroDef constructor = do @@ -26,24 +28,36 @@ macroDef constructor = do nameMacroPairs <- newcommand <|> letmacro <|> edefmacro <|> defmacro <|> newif guardDisabled Ext_latex_macros <|> - mapM_ (\(name, macro') -> - updateState (\s -> s{ sMacros = M.insert name macro' - (sMacros s) })) nameMacroPairs + mapM_ insertMacro nameMacroPairs environmentDef = do mbenv <- newenvironment case mbenv of Nothing -> return () Just (name, macro1, macro2) -> guardDisabled Ext_latex_macros <|> - do updateState $ \s -> s{ sMacros = - M.insert name macro1 (sMacros s) } - updateState $ \s -> s{ sMacros = - M.insert ("end" <> name) macro2 (sMacros s) } + do insertMacro (name, macro1) + insertMacro ("end" <> name, macro2) -- @\newenvironment{envname}[n-args][default]{begin}{end}@ -- is equivalent to -- @\newcommand{\envname}[n-args][default]{begin}@ -- @\newcommand{\endenvname}@ +insertMacro :: PandocMonad m => (Text, Macro) -> LP m () +insertMacro (name, macro'@(Macro GlobalScope _ _ _ _)) = + updateState $ \s -> + s{ sMacros = NonEmpty.map (M.insert name macro') (sMacros s) } +insertMacro (name, macro'@(Macro GroupScope _ _ _ _)) = + updateState $ \s -> + s{ sMacros = M.insert name macro' (NonEmpty.head (sMacros s)) :| + NonEmpty.tail (sMacros s) } + +lookupMacro :: PandocMonad m => Text -> LP m Macro +lookupMacro name = do + macros :| _ <- sMacros <$> getState + case M.lookup name macros of + Just m -> return m + Nothing -> fail "Macro not found" + letmacro :: PandocMonad m => LP m [(Text, Macro)] letmacro = do controlSeq "let" @@ -54,20 +68,19 @@ letmacro = do -- we first parse in verbatim mode, and then expand macros, -- because we don't want \let\foo\bar to turn into -- \let\foo hello if we have previously \def\bar{hello} - macros <- sMacros <$> getState target <- anyControlSeq <|> singleChar case target of (Tok _ (CtrlSeq name') _) -> - case M.lookup name' macros of - Just m -> return [(name, m)] - Nothing -> return [(name, Macro ExpandWhenDefined [] Nothing [target])] - _ -> return [(name, Macro ExpandWhenDefined [] Nothing [target])] + (do m <- lookupMacro name' + pure [(name, m)]) + <|> pure [(name, + Macro GroupScope ExpandWhenDefined [] Nothing [target])] + _ -> pure [(name, Macro GroupScope ExpandWhenDefined [] Nothing [target])] edefmacro :: PandocMonad m => LP m [(Text, Macro)] edefmacro = do - controlSeq "edef" <|> controlSeq "xdef" - -- TODO Currently we don't distinguish these. \edef should only - -- affect its own group, while \xdef sets a global macro. + scope <- (GroupScope <$ controlSeq "edef") + <|> (GlobalScope <$ controlSeq "xdef") (name, contents) <- withVerbatimMode $ do Tok _ (CtrlSeq name) _ <- anyControlSeq -- we first parse in verbatim mode, and then expand macros, @@ -77,20 +90,19 @@ edefmacro = do return (name, contents) -- expand macros contents' <- parseFromToks (many anyTok) contents - return [(name, Macro ExpandWhenDefined [] Nothing contents')] + return [(name, Macro scope ExpandWhenDefined [] Nothing contents')] defmacro :: PandocMonad m => LP m [(Text, Macro)] defmacro = do -- we use withVerbatimMode, because macros are to be expanded -- at point of use, not point of definition - controlSeq "def" <|> controlSeq "gdef" - -- TODO Currently we don't distinguish these. \def should only - -- affect its own group, while \gdef sets a global macro. + scope <- (GroupScope <$ controlSeq "def") + <|> (GlobalScope <$ controlSeq "gdef") withVerbatimMode $ do Tok _ (CtrlSeq name) _ <- anyControlSeq argspecs <- many (argspecArg <|> argspecPattern) contents <- bracedOrToken - return [(name, Macro ExpandWhenUsed argspecs Nothing contents)] + return [(name, Macro scope ExpandWhenUsed argspecs Nothing contents)] -- \newif\iffoo' defines: -- \iffoo to be \iffalse @@ -105,16 +117,16 @@ newif = do -- \def\footrue{\def\iffoo\iftrue} -- \def\foofalse{\def\iffoo\iffalse} let base = T.drop 2 name - return [ (name, Macro ExpandWhenUsed [] Nothing + return [ (name, Macro GroupScope ExpandWhenUsed [] Nothing [Tok pos (CtrlSeq "iffalse") "\\iffalse"]) , (base <> "true", - Macro ExpandWhenUsed [] Nothing + Macro GroupScope ExpandWhenUsed [] Nothing [ Tok pos (CtrlSeq "def") "\\def" , Tok pos (CtrlSeq name) ("\\" <> name) , Tok pos (CtrlSeq "iftrue") "\\iftrue" ]) , (base <> "false", - Macro ExpandWhenUsed [] Nothing + Macro GroupScope ExpandWhenUsed [] Nothing [ Tok pos (CtrlSeq "def") "\\def" , Tok pos (CtrlSeq name) ("\\" <> name) , Tok pos (CtrlSeq "iffalse") "\\iffalse" @@ -161,14 +173,13 @@ newcommand = do : (contents' ++ [ Tok pos Symbol "}", Tok pos Symbol "}" ]) _ -> contents' - macros <- sMacros <$> getState - case M.lookup name macros of - Just macro - | mtype == "newcommand" -> do - report $ MacroAlreadyDefined txt pos - return [(name, macro)] - | mtype == "providecommand" -> return [(name, macro)] - _ -> return [(name, Macro ExpandWhenUsed argspecs optarg contents)] + let macro = Macro GroupScope ExpandWhenUsed argspecs optarg contents + (do lookupMacro name + case mtype of + "providecommand" -> return [] + "renewcommand" -> return [(name, macro)] + _ -> [] <$ report (MacroAlreadyDefined txt pos)) + <|> pure [(name, macro)] newenvironment :: PandocMonad m => LP m (Maybe (Text, Macro, Macro)) newenvironment = do @@ -187,17 +198,22 @@ newenvironment = do let argspecs = map (\i -> ArgNum i) [1..numargs] startcontents <- spaces >> bracedOrToken endcontents <- spaces >> bracedOrToken - macros <- sMacros <$> getState - case M.lookup name macros of - Just _ - | mtype == "newenvironment" -> do - report $ MacroAlreadyDefined name pos - return Nothing - | mtype == "provideenvironment" -> - return Nothing - _ -> return $ Just (name, - Macro ExpandWhenUsed argspecs optarg startcontents, - Macro ExpandWhenUsed [] Nothing endcontents) + -- we need the environment to be in a group so macros defined + -- inside behave correctly: + let bg = Tok pos (CtrlSeq "bgroup") "\\bgroup " + let eg = Tok pos (CtrlSeq "egroup") "\\egroup " + let result = (name, + Macro GroupScope ExpandWhenUsed argspecs optarg + (bg:startcontents), + Macro GroupScope ExpandWhenUsed [] Nothing (eg:endcontents)) + (do lookupMacro name + case mtype of + "provideenvironment" -> return Nothing + "renewenvironment" -> return (Just result) + _ -> do + report $ MacroAlreadyDefined name pos + return Nothing) + <|> return (Just result) bracketedNum :: PandocMonad m => LP m Int bracketedNum = do |