module Text.Highlighting.Kate.Syntax.Lex
(highlight, parseExpression, syntaxName, syntaxExtensions)
where
import Text.Highlighting.Kate.Types
import Text.Highlighting.Kate.Common
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 = "Lex/Flex"
syntaxExtensions :: String
syntaxExtensions = "*.l;*.lex;*.flex"
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 = "Lex/Flex" }
context <- currentContext <|> (pushContext "Pre Start" >> currentContext)
result <- parseRules context
optional $ eof >> pEndLine
updateState $ \st -> st { synStLanguage = oldLang }
return result
startingState = SyntaxState {synStContexts = fromList [("Lex/Flex",["Pre Start"])], synStLanguage = "Lex/Flex", synStLineNumber = 0, synStPrevChar = '\n', synStPrevNonspace = False, synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}
pEndLine = do
updateState $ \st -> st{ synStPrevNonspace = False }
context <- currentContext
case context of
"Pre Start" -> return ()
"Definitions" -> return ()
"Rules" -> return ()
"User Code" -> return ()
"Percent Command" -> (popContext) >> pEndLine
"Comment" -> return ()
"Definition RegExpr" -> (popContext) >> pEndLine
"Rule RegExpr" -> (popContext) >> pEndLine
"RegExpr (" -> return ()
"RegExpr [" -> return ()
"RegExpr {" -> return ()
"RegExpr Q" -> return ()
"RegExpr Base" -> return ()
"Start Conditions Scope" -> return ()
"Action" -> (popContext) >> pEndLine
"Detect C" -> return ()
"Indented C" -> (popContext) >> pEndLine
"Lex C Bloc" -> return ()
"Lex Rule C Bloc" -> return ()
"Normal C Bloc" -> return ()
"Action C" -> (popContext) >> pEndLine
_ -> 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_'2e = compileRegex "."
regex_'5bA'2dZa'2dz'5f'5d'5cw'2a'5cs'2b = compileRegex "[A-Za-z_]\\w*\\s+"
regex_'5cS = compileRegex "\\S"
regex_'2e'2a = compileRegex ".*"
regex_'5c'7b'24 = compileRegex "\\{$"
regex_'5cs'2b = compileRegex "\\s+"
regex_'5c'5c'2e = compileRegex "\\\\."
regex_'5cs'2a'5c'7d = compileRegex "\\s*\\}"
regex_'5cs'2a = compileRegex "\\s*"
regex_'5c'7c'5cs'2a'24 = compileRegex "\\|\\s*$"
regex_'5cs = compileRegex "\\s"
defaultAttributes = [("Pre Start",NormalTok),("Definitions",NormalTok),("Rules",NormalTok),("User Code",NormalTok),("Percent Command",KeywordTok),("Comment",CommentTok),("Definition RegExpr",StringTok),("Rule RegExpr",StringTok),("RegExpr (",StringTok),("RegExpr [",StringTok),("RegExpr {",StringTok),("RegExpr Q",StringTok),("RegExpr Base",StringTok),("Start Conditions Scope",NormalTok),("Action",NormalTok),("Detect C",NormalTok),("Indented C",NormalTok),("Lex C Bloc",NormalTok),("Lex Rule C Bloc",NormalTok),("Normal C Bloc",NormalTok),("Action C",NormalTok)]
parseRules "Pre Start" =
((lookAhead (pRegExpr regex_'2e) >> pushContext "Definitions" >> currentContext >>= parseRules))
parseRules "Definitions" =
(((parseRules "Detect C"))
<|>
((pDetect2Chars False '%' '%' >>= withAttribute BaseNTok) >>~ pushContext "Rules")
<|>
((pDetectChar False '%' >>= withAttribute KeywordTok) >>~ pushContext "Percent Command")
<|>
((pColumn 0 >> pDetect2Chars False '/' '*' >>= withAttribute CommentTok) >>~ pushContext "Comment")
<|>
((pColumn 0 >> pRegExpr regex_'5bA'2dZa'2dz'5f'5d'5cw'2a'5cs'2b >>= withAttribute DataTypeTok) >>~ pushContext "Definition RegExpr"))
parseRules "Rules" =
(((parseRules "Detect C"))
<|>
((pDetect2Chars False '%' '%' >>= withAttribute BaseNTok) >>~ pushContext "User Code")
<|>
(pushContext "Rule RegExpr" >> currentContext >>= parseRules))
parseRules "User Code" =
((Text.Highlighting.Kate.Syntax.Cpp.parseExpression))
parseRules "Percent Command" =
pzero
parseRules "Comment" =
((pDetect2Chars False '*' '/' >>= withAttribute CommentTok) >>~ (popContext))
parseRules "Definition RegExpr" =
(((parseRules "RegExpr Base"))
<|>
((pRegExpr regex_'5cS >>= withAttribute StringTok))
<|>
((pRegExpr regex_'2e'2a >>= withAttribute AlertTok)))
parseRules "Rule RegExpr" =
(((pRegExpr regex_'5c'7b'24 >>= withAttribute BaseNTok) >>~ pushContext "Start Conditions Scope")
<|>
((parseRules "RegExpr Base"))
<|>
((pRegExpr regex_'5cS >>= withAttribute StringTok))
<|>
((pRegExpr regex_'5cs'2b >>= withAttribute NormalTok) >>~ pushContext "Action"))
parseRules "RegExpr (" =
(((parseRules "RegExpr Base"))
<|>
((pDetectChar False ')' >>= withAttribute StringTok) >>~ (popContext))
<|>
((pRegExpr regex_'2e >>= withAttribute StringTok)))
parseRules "RegExpr [" =
(((pRegExpr regex_'5c'5c'2e >>= withAttribute StringTok))
<|>
((pDetectChar False ']' >>= withAttribute StringTok) >>~ (popContext))
<|>
((pRegExpr regex_'2e >>= withAttribute StringTok)))
parseRules "RegExpr {" =
(((pRegExpr regex_'5c'5c'2e >>= withAttribute StringTok))
<|>
((pDetectChar False '}' >>= withAttribute StringTok) >>~ (popContext))
<|>
((pRegExpr regex_'2e >>= withAttribute StringTok)))
parseRules "RegExpr Q" =
(((pRegExpr regex_'5c'5c'2e >>= withAttribute StringTok))
<|>
((pDetectChar False '"' >>= withAttribute StringTok) >>~ (popContext))
<|>
((pRegExpr regex_'2e >>= withAttribute StringTok)))
parseRules "RegExpr Base" =
(((pRegExpr regex_'5c'5c'2e >>= withAttribute StringTok))
<|>
((pDetectChar False '(' >>= withAttribute StringTok) >>~ pushContext "RegExpr (")
<|>
((pDetectChar False '[' >>= withAttribute StringTok) >>~ pushContext "RegExpr [")
<|>
((pDetectChar False '{' >>= withAttribute StringTok) >>~ pushContext "RegExpr {")
<|>
((pDetectChar False '"' >>= withAttribute StringTok) >>~ pushContext "RegExpr Q"))
parseRules "Start Conditions Scope" =
(((pRegExpr regex_'5cs'2a'5c'7d >>= withAttribute BaseNTok) >>~ (popContext))
<|>
((pRegExpr regex_'5cs'2a >>= withAttribute NormalTok) >>~ pushContext "Rule RegExpr")
<|>
(pushContext "Rule RegExpr" >> currentContext >>= parseRules))
parseRules "Action" =
(((pRegExpr regex_'5c'7c'5cs'2a'24 >>= withAttribute KeywordTok))
<|>
((pDetect2Chars False '%' '{' >>= withAttribute BaseNTok) >>~ pushContext "Lex Rule C Bloc")
<|>
(pushContext "Action C" >> currentContext >>= parseRules))
parseRules "Detect C" =
(((pColumn 0 >> pRegExpr regex_'5cs >>= withAttribute NormalTok) >>~ pushContext "Indented C")
<|>
((pColumn 0 >> pDetect2Chars False '%' '{' >>= withAttribute BaseNTok) >>~ pushContext "Lex C Bloc"))
parseRules "Indented C" =
((Text.Highlighting.Kate.Syntax.Cpp.parseExpression))
parseRules "Lex C Bloc" =
(((pColumn 0 >> pDetect2Chars False '%' '}' >>= withAttribute BaseNTok) >>~ (popContext))
<|>
((Text.Highlighting.Kate.Syntax.Cpp.parseExpression)))
parseRules "Lex Rule C Bloc" =
(((pDetect2Chars False '%' '}' >>= withAttribute BaseNTok) >>~ (popContext))
<|>
((Text.Highlighting.Kate.Syntax.Cpp.parseExpression)))
parseRules "Normal C Bloc" =
(((pDetectChar False '{' >>= withAttribute NormalTok) >>~ pushContext "Normal C Bloc")
<|>
((pDetectChar False '}' >>= withAttribute NormalTok) >>~ (popContext))
<|>
((Text.Highlighting.Kate.Syntax.Cpp.parseExpression)))
parseRules "Action C" =
(((pDetectChar False '{' >>= withAttribute NormalTok) >>~ pushContext "Normal C Bloc")
<|>
((pDetectChar False '}' >>= withAttribute AlertTok))
<|>
((Text.Highlighting.Kate.Syntax.Cpp.parseExpression)))
parseRules "" = parseRules "Pre Start"
parseRules x = fail $ "Unknown context" ++ x