How to use

advance

method

in

com.intellij.openapi.editor.highlighter.HighlighterIterator

 @Nullable
 @Override
 public BracePair findPair(boolean left, HighlighterIterator iterator, CharSequence fileText, FileType fileType) {
  BracePair pair = super.findPair(left, iterator, fileText, fileType);

  if (pair == Paired.DO_END || pair == Paired.FN_END) {
   iterator.advance();

   if (!iterator.atEnd()) {
    IElementType tokenType = iterator.getTokenType();

    if (tokenType == ElixirTypes.KEYWORD_PAIR_COLON) {
     pair = null;
    }
   }

   iterator.retreat();
  }

  return pair;
 }
}

@Nullable
@Override
public CharSequence getClosingQuote(HighlighterIterator highlighterIterator, int offset) {
  CharSequence closingQuote = null;
  if (highlighterIterator.getStart() > 0) {
    highlighterIterator.retreat();
    try {
      IElementType tokenType = highlighterIterator.getTokenType();
      if (CLOSING_QUOTE_BY_OPENING_QUOTE.get(tokenType) != null) {
        Document document = highlighterIterator.getDocument();
        if (document != null) {
          String promoter = document.getText(
              new TextRange(highlighterIterator.getStart(), highlighterIterator.getEnd())
          );
          String terminator = StackFrame.TERMINATOR_BY_PROMOTER.get(promoter);
          if (terminator != null) {
            if (terminator.length() >= 3) {
              closingQuote = "\n" + terminator;
            } else {
              closingQuote = terminator;
            }
          }
        }
      }
    } finally {
      highlighterIterator.advance();
    }
  }
  return closingQuote;
}

/**
 * Iterates forward until atEnd or non-space token
 */
@NotNull
public static HighlighterIterator moveToNextMeaningfulToken(@NotNull HighlighterIterator iterator) {
 iterator.advance();
 while (!iterator.atEnd()) {
  IElementType tokenType = iterator.getTokenType();
  if (tokenType != TokenType.WHITE_SPACE) {
   break;
  }
  iterator.advance();
 }
 return iterator;
}

 return true;
highlighterIterator.advance();

int initOffset = iterator.atEnd() ? -1 : iterator.getStart();
Stack<IElementType> braceStack = new Stack<>();
for (; !iterator.atEnd(); iterator.advance()) {
  final IElementType tokenType = iterator.getTokenType();

iterator.advance();
IElementType possibleCloseQuoteType = iterator.atEnd() ? null : iterator.getTokenType();
if (QUOTE_CLOSE_FIRST_ANY.contains(possibleCloseQuoteType) && closeChar == text.charAt(iterator.getStart())) {
 if (COMPLEX_QUOTE_OPENERS.contains(quotePrefixType) && StringUtil.containsChar(HANDLED_BY_BRACE_MATCHER, openChar)) {
  iterator.advance();
  if (iterator.atEnd() || !QUOTE_OPEN_ANY.contains(iterator.getTokenType())) {
   EditorModificationUtil.insertStringAtCaret(editor, Character.toString(closeChar) + openChar, false, false);

protected void doLexerHighlightingTest(String fileContent, IElementType targetElementType) {
  BashSyntaxHighlighter syntaxHighlighter = new BashSyntaxHighlighter();
  TextAttributesKey[] keys = syntaxHighlighter.getTokenHighlights(targetElementType);
  Assert.assertEquals("Expected one key", 1, keys.length);
  TextAttributesKey attributesKey = keys[0];
  Assert.assertNotNull(attributesKey);
  EditorColorsManager manager = EditorColorsManager.getInstance();
  EditorColorsScheme scheme = (EditorColorsScheme) manager.getGlobalScheme().clone();
  manager.addColorsScheme(scheme);
  EditorColorsManager.getInstance().setGlobalScheme(scheme);
  TextAttributes targetAttributes = new TextAttributes(JBColor.RED, JBColor.BLUE, JBColor.GRAY, EffectType.BOXED, Font.BOLD);
  scheme.setAttributes(attributesKey, targetAttributes);
  myFixture.configureByText(BashFileType.BASH_FILE_TYPE, fileContent);
  TextAttributes actualAttributes = null;
  HighlighterIterator iterator = ((EditorImpl) myFixture.getEditor()).getHighlighter().createIterator(0);
  while (!iterator.atEnd()) {
    if (iterator.getTokenType() == targetElementType) {
      actualAttributes = iterator.getTextAttributes();
      break;
    }
    iterator.advance();
  }
  Assert.assertEquals("Expected text attributes for " + attributesKey, targetAttributes, actualAttributes);
}