module Text.Highlighting.Kate.Syntax.Noweb
(highlight, parseExpression, syntaxName, syntaxExtensions)
where
import Text.Highlighting.Kate.Types
import Text.Highlighting.Kate.Common
import qualified Text.Highlighting.Kate.Syntax.Html
import qualified Text.Highlighting.Kate.Syntax.Cpp
import Text.ParserCombinators.Parsec hiding (State)
import Data.Map (fromList)
import Control.Monad.State
import Data.Char (isSpace)
import Data.Maybe (fromMaybe)
syntaxName :: String
syntaxName = "noweb"
syntaxExtensions :: String
syntaxExtensions = "*.w;*.nw"
highlight :: String -> [SourceLine]
highlight input = evalState (mapM parseSourceLine $ lines input) startingState
parseSourceLine :: String -> State SyntaxState SourceLine
parseSourceLine = mkParseSourceLine parseExpressionInternal pEndLine
parseExpression :: KateParser Token
parseExpression = do
st <- getState
let oldLang = synStLanguage st
setState $ st { synStLanguage = "noweb" }
context <- currentContext <|> (pushContext "RawDocumentation" >> currentContext)
result <- parseRules context
optional $ eof >> pEndLine
updateState $ \st -> st { synStLanguage = oldLang }
return result
startingState = SyntaxState {synStContexts = fromList [("noweb",["RawDocumentation"])], synStLanguage = "noweb", synStLineNumber = 0, synStPrevChar = '\n', synStPrevNonspace = False, synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}
pEndLine = do
updateState $ \st -> st{ synStPrevNonspace = False }
context <- currentContext
case context of
"RawDocumentation" -> return ()
"CodeQuote" -> return ()
"CodeSection" -> return ()
"SectionNames" -> return ()
_ -> return ()
withAttribute attr txt = do
when (null txt) $ fail "Parser matched no text"
updateState $ \st -> st { synStPrevChar = last txt
, synStPrevNonspace = synStPrevNonspace st || not (all isSpace txt) }
return (attr, txt)
parseExpressionInternal = do
context <- currentContext
parseRules context <|> (pDefault >>= withAttribute (fromMaybe NormalTok $ lookup context defaultAttributes))
regex_'3c'3c'2e'2a'3e'3e'3d'24 = compileRegex "<<.*>>=$"
regex_'5c'5d'5c'5d'28'3f'21'5c'5d'29 = compileRegex "\\]\\](?!\\])"
regex_'40'24 = compileRegex "@$"
regex_'40'28'3f'3d'5b'5cs'25'5d'29 = compileRegex "@(?=[\\s%])"
regex_'40'3c'3c = compileRegex "@<<"
regex_'3c'3c'2e'2a'5b'5e'40'5d'3e'3e'28'3f'21'3d'29 = compileRegex "<<.*[^@]>>(?!=)"
defaultAttributes = [("RawDocumentation",NormalTok),("CodeQuote",NormalTok),("CodeSection",NormalTok),("SectionNames",NormalTok)]
parseRules "RawDocumentation" =
(((pColumn 0 >> pRegExpr regex_'3c'3c'2e'2a'3e'3e'3d'24 >>= withAttribute RegionMarkerTok) >>~ pushContext "CodeSection")
<|>
((pDetect2Chars False '@' '[' >>= withAttribute NormalTok))
<|>
((pDetect2Chars False '[' '[' >>= withAttribute RegionMarkerTok) >>~ pushContext "CodeQuote")
<|>
((Text.Highlighting.Kate.Syntax.Html.parseExpression)))
parseRules "CodeQuote" =
(((pDetect2Chars False '@' ']' >>= withAttribute NormalTok))
<|>
((pRegExpr regex_'5c'5d'5c'5d'28'3f'21'5c'5d'29 >>= withAttribute RegionMarkerTok) >>~ (popContext))
<|>
((parseRules "SectionNames"))
<|>
((Text.Highlighting.Kate.Syntax.Cpp.parseExpression)))
parseRules "CodeSection" =
(((pColumn 0 >> pRegExpr regex_'40'24 >>= withAttribute RegionMarkerTok) >>~ pushContext "RawDocumentation")
<|>
((pColumn 0 >> pRegExpr regex_'40'28'3f'3d'5b'5cs'25'5d'29 >>= withAttribute RegionMarkerTok) >>~ pushContext "RawDocumentation")
<|>
((pColumn 0 >> lookAhead (pRegExpr regex_'3c'3c'2e'2a'3e'3e'3d'24) >> pushContext "RawDocumentation" >> currentContext >>= parseRules))
<|>
((parseRules "SectionNames"))
<|>
((Text.Highlighting.Kate.Syntax.Cpp.parseExpression)))
parseRules "SectionNames" =
(((pRegExpr regex_'40'3c'3c >>= withAttribute NormalTok))
<|>
((pRegExpr regex_'3c'3c'2e'2a'5b'5e'40'5d'3e'3e'28'3f'21'3d'29 >>= withAttribute RegionMarkerTok)))
parseRules "" = parseRules "RawDocumentation"
parseRules x = fail $ "Unknown context" ++ x