{- This module was generated from data in the Kate syntax highlighting file wml.xml, version 0.40,
   by  Zachary Palmer (zep01@bahj.com), modif. by Ignacio Riquelme M. (shadowm2006@gmail.com) and Jonathan Schmidt-Dominé (devel@the-user.org) -}

module Text.Highlighting.Kate.Syntax.Wml ( highlight, parseExpression, syntaxName, syntaxExtensions ) where
import Text.Highlighting.Kate.Definitions
import Text.Highlighting.Kate.Common
import qualified Text.Highlighting.Kate.Syntax.Pango
import qualified Text.Highlighting.Kate.Syntax.Lua
import qualified Text.Highlighting.Kate.Syntax.Alert
import Text.ParserCombinators.Parsec
import Control.Monad (when)
import Data.Map (fromList)
import Data.Maybe (fromMaybe, maybeToList)

import qualified Data.Set as Set
-- | Full name of language.
syntaxName :: String
syntaxName = "Wesnoth Markup Language"

-- | Filename extensions for this language.
syntaxExtensions :: String
syntaxExtensions = "*.cfg;*.pbl;*.CFG;*.PBL"

-- | Highlight source code using this syntax definition.
highlight :: String -> Either String [SourceLine]
highlight input =
  case runParser parseSource startingState "source" input of
    Left err     -> Left $ show err
    Right result -> Right result

-- | Parse an expression using appropriate local context.
parseExpression :: GenParser Char SyntaxState LabeledSource
parseExpression = do
  st <- getState
  let oldLang = synStLanguage st
  setState $ st { synStLanguage = "Wesnoth Markup Language" }
  context <- currentContext <|> (pushContext "text" >> currentContext)
  result <- parseRules context
  updateState $ \st -> st { synStLanguage = oldLang }
  return result

parseSource = do 
  lineContents <- lookAhead wholeLine
  updateState $ \st -> st { synStCurrentLine = lineContents }
  result <- manyTill parseSourceLine eof
  return $ map normalizeHighlighting result

startingState = SyntaxState {synStContexts = fromList [("Wesnoth Markup Language",["text"])], synStLanguage = "Wesnoth Markup Language", synStCurrentLine = "", synStCharsParsedInLine = 0, synStPrevChar = '\n', synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}

parseSourceLine = manyTill parseExpressionInternal pEndLine

pEndLine = do
  lookAhead $ newline <|> (eof >> return '\n')
  context <- currentContext
  case context of
    "text" -> return () >> pHandleEndLine
    "string" -> return () >> pHandleEndLine
    "luastring" -> return () >> pHandleEndLine
    "luamacrostring" -> return () >> pHandleEndLine
    "comment" -> (popContext) >> pEndLine
    "macro" -> return () >> pHandleEndLine
    "macroString" -> return () >> pHandleEndLine
    "macroString2" -> return () >> pHandleEndLine
    "section" -> pushContext "error" >> pHandleEndLine
    "value" -> (popContext) >> pEndLine
    "preprocessor" -> (popContext) >> pEndLine
    "error" -> (popContext) >> pEndLine
    "variableSubstitution" -> (popContext) >> pEndLine
    "variableSubscript" -> pushContext "error" >> pHandleEndLine
    "variableSubstitutionRule" -> (popContext) >> pEndLine
    _ -> pHandleEndLine

withAttribute attr txt = do
  when (null txt) $ fail "Parser matched no text"
  let labs = attr : maybeToList (lookup attr styles)
  st <- getState
  let oldCharsParsed = synStCharsParsedInLine st
  let prevchar = if null txt then '\n' else last txt
  updateState $ \st -> st { synStCharsParsedInLine = oldCharsParsed + length txt, synStPrevChar = prevchar } 
  return (labs, txt)

styles = [("Normal Text","st"),("Maintenance script statement","al"),("String","st"),("Comment","co"),("Macro/Include","fu"),("WML Node","kw"),("WML Attribute","dt"),("Preprocessor","ot"),("Error","er"),("Macro String","ch"),("Variable Substitution","dv"),("Variable Subscript","bn")]

parseExpressionInternal = do
  context <- currentContext
  parseRules context <|> (pDefault >>= withAttribute (fromMaybe "" $ lookup context defaultAttributes))

list_alerts'5fwml'5futils = Set.fromList $ words $ "wmllint wmlindent wmlscope"
list_preprocessor'5fdirective'5fstatements = Set.fromList $ words $ "#textdomain #else #undef"
list_preprocessor'5fblock'5fbegin'5fstatements = Set.fromList $ words $ "#define #ifdef #ifndef"
list_preprocessor'5fblock'5fend'5fstatements = Set.fromList $ words $ "#enddef #endif"

regex_'28'5f_'2a'29'3f'22 = compileRegex "(_ *)?\""
regex__'2a'3c'3c = compileRegex " *<<"
regex_'5c'5b'28'3f'21'2f'29 = compileRegex "\\[(?!/)"
regex_'5c'5b'2f = compileRegex "\\[/"
regex_'28'5cw'7c'2c'7c_'29'2b'3d = compileRegex "(\\w|,| )+="
regex_'3e'3e = compileRegex ">>"
regex_'5b'5eA'2dZa'2dz0'2d9'5f'5c'2e'5d = compileRegex "[^A-Za-z0-9_\\.]"

defaultAttributes = [("text","Normal WML Text"),("string","String"),("luastring","String"),("luamacrostring","Macro String"),("comment","Comment"),("macro","Macro/Include"),("macroString","Macro String"),("macroString2","Macro String"),("section","WML Node"),("value","WML Attribute"),("preprocessor","Preprocessor"),("error","Error"),("variableSubstitution","Variable Substitution"),("variableSubscript","Variable Subscript"),("variableSubstitutionRule","Variable Substitution")]

parseRules "text" = 
  do (attr, result) <- (((pRegExpr regex_'28'5f_'2a'29'3f'22 >>= withAttribute "String") >>~ pushContext "string")
                        <|>
                        ((pRegExpr regex__'2a'3c'3c >>= withAttribute "String") >>~ pushContext "luastring")
                        <|>
                        ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_preprocessor'5fdirective'5fstatements >>= withAttribute "Preprocessor") >>~ pushContext "preprocessor")
                        <|>
                        ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_preprocessor'5fblock'5fbegin'5fstatements >>= withAttribute "Preprocessor") >>~ pushContext "preprocessor")
                        <|>
                        ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_preprocessor'5fblock'5fend'5fstatements >>= withAttribute "Preprocessor") >>~ pushContext "preprocessor")
                        <|>
                        ((pDetectChar False '#' >>= withAttribute "Comment") >>~ pushContext "comment")
                        <|>
                        ((pDetectChar False '{' >>= withAttribute "Macro/Include") >>~ pushContext "macro")
                        <|>
                        ((pRegExpr regex_'5c'5b'28'3f'21'2f'29 >>= withAttribute "WML Node") >>~ pushContext "section")
                        <|>
                        ((pRegExpr regex_'5c'5b'2f >>= withAttribute "WML Node") >>~ pushContext "section")
                        <|>
                        ((lookAhead (pRegExpr regex_'28'5cw'7c'2c'7c_'29'2b'3d) >> return ([],"") ) >>~ pushContext "value")
                        <|>
                        ((parseRules "variableSubstitutionRule")))
     return (attr, result)

parseRules "string" = 
  do (attr, result) <- (((pDetectChar False '"' >>= withAttribute "String") >>~ (popContext))
                        <|>
                        ((pDetectChar False '{' >>= withAttribute "Macro/Include") >>~ pushContext "macro")
                        <|>
                        ((parseRules "variableSubstitutionRule"))
                        <|>
                        ((Text.Highlighting.Kate.Syntax.Pango.parseExpression)))
     return (attr, result)

parseRules "luastring" = 
  do (attr, result) <- (((pRegExpr regex_'3e'3e >>= withAttribute "String") >>~ (popContext))
                        <|>
                        ((Text.Highlighting.Kate.Syntax.Lua.parseExpression)))
     return (attr, result)

parseRules "luamacrostring" = 
  do (attr, result) <- (((pRegExpr regex_'3e'3e >>= withAttribute "Macro String") >>~ (popContext))
                        <|>
                        ((Text.Highlighting.Kate.Syntax.Lua.parseExpression)))
     return (attr, result)

parseRules "comment" = 
  do (attr, result) <- (((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_alerts'5fwml'5futils >>= withAttribute "Maintenance script statement"))
                        <|>
                        ((Text.Highlighting.Kate.Syntax.Alert.parseExpression)))
     return (attr, result)

parseRules "macro" = 
  do (attr, result) <- (((pDetectChar False '{' >>= withAttribute "Macro/Include") >>~ pushContext "macro")
                        <|>
                        ((pRegExpr regex_'28'5f_'2a'29'3f'22 >>= withAttribute "Macro String") >>~ pushContext "macroString")
                        <|>
                        ((pRegExpr regex__'2a'3c'3c >>= withAttribute "Macro String") >>~ pushContext "luamacrostring")
                        <|>
                        ((pDetectChar False '(' >>= withAttribute "Macro String") >>~ pushContext "macroString2")
                        <|>
                        ((pDetectChar False '}' >>= withAttribute "Macro/Include") >>~ (popContext))
                        <|>
                        ((parseRules "variableSubstitutionRule")))
     return (attr, result)

parseRules "macroString" = 
  do (attr, result) <- (((pDetectChar False '"' >>= withAttribute "Macro String") >>~ (popContext))
                        <|>
                        ((pDetectChar False '{' >>= withAttribute "Macro/Include") >>~ pushContext "macro")
                        <|>
                        ((parseRules "variableSubstitutionRule"))
                        <|>
                        ((Text.Highlighting.Kate.Syntax.Pango.parseExpression)))
     return (attr, result)

parseRules "macroString2" = 
  do (attr, result) <- (((pDetectChar False ')' >>= withAttribute "Macro String") >>~ (popContext))
                        <|>
                        ((pDetectChar False '{' >>= withAttribute "Macro/Include") >>~ pushContext "macro")
                        <|>
                        ((parseRules "text")))
     return (attr, result)

parseRules "section" = 
  do (attr, result) <- ((pDetectChar False ']' >>= withAttribute "WML Node") >>~ (popContext))
     return (attr, result)

parseRules "value" = 
  do (attr, result) <- ((pDetectChar False '=' >>= withAttribute "Normal WML Text") >>~ (popContext))
     return (attr, result)

parseRules "preprocessor" = 
  pzero

parseRules "error" = 
  pzero

parseRules "variableSubstitution" = 
  do (attr, result) <- (((pDetectChar False '|' >>= withAttribute "Variable Substitution") >>~ (popContext))
                        <|>
                        ((pDetectChar False '$' >>= withAttribute "Variable Substitution") >>~ pushContext "variableSubstitution")
                        <|>
                        ((pDetectChar False '[' >>= withAttribute "Variable Subscript") >>~ pushContext "variableSubscript")
                        <|>
                        ((lookAhead (pRegExpr regex_'5b'5eA'2dZa'2dz0'2d9'5f'5c'2e'5d) >> return ([],"") ) >>~ (popContext)))
     return (attr, result)

parseRules "variableSubscript" = 
  do (attr, result) <- ((pDetectChar False ']' >>= withAttribute "Variable Subscript") >>~ (popContext))
     return (attr, result)

parseRules "variableSubstitutionRule" = 
  do (attr, result) <- ((pDetectChar False '$' >>= withAttribute "Variable Substitution") >>~ pushContext "variableSubstitution")
     return (attr, result)

parseRules "" = parseRules "text"

parseRules x = fail $ "Unknown context" ++ x