question: Object addParserHighlight ( ParserNotice notice , HighlightPainter p ) throws BadLocationException { Document doc = textArea . getDocument ( ) ; TextUI mapper = textArea . getUI ( ) ; int start = notice . getOffset ( ) ; int end = 0 ; if ( start == - 1 ) { int line = notice . getLine ( ) ; Element root = doc . getDefaultRootElement ( ) ; if ( line >= 0 && line < root . getElementCount ( ) ) { Element elem = root . getElement ( line ) ; start = elem . getStartOffset ( ) ; end = elem . getEndOffset ( ) ; } } else { end = start + notice . getLength ( ) ; } HighlightInfo i = new LayeredHighlightInfo ( ) ; i . painter = p ; i . p0 = doc . createPosition ( start ) ; i . p1 = doc . createPosition ( end ) ; i . notice = notice ; parserHighlights . add ( i ) ; mapper . damageRange ( textArea , start , end ) ; return i ; }
target:  Adds a special "marked occurrence" highlight.