public void annotate()

in simple_language_plugin/src/main/java/org/intellij/sdk/language/SimpleAnnotator.java [25:66]
28 lines of code
6 McCabe index (conditional complexity)

  public void annotate(@NotNull final PsiElement element, @NotNull AnnotationHolder holder) {
    // Ensure the PSI Element is an expression
    if (!(element instanceof PsiLiteralExpression literalExpression)) {
      return;
    }

    // Ensure the PSI element contains a string that starts with the prefix and separator
    String value = literalExpression.getValue() instanceof String ? (String) literalExpression.getValue() : null;
    if (value == null || !value.startsWith(SIMPLE_PREFIX_STR + SIMPLE_SEPARATOR_STR)) {
      return;
    }

    // Define the text ranges (start is inclusive, end is exclusive)
    // "simple:key"
    //  01234567890
    TextRange prefixRange = TextRange.from(element.getTextRange().getStartOffset(), SIMPLE_PREFIX_STR.length() + 1);
    TextRange separatorRange = TextRange.from(prefixRange.getEndOffset(), SIMPLE_SEPARATOR_STR.length());
    TextRange keyRange = new TextRange(separatorRange.getEndOffset(), element.getTextRange().getEndOffset() - 1);

    // highlight "simple" prefix and ":" separator
    holder.newSilentAnnotation(HighlightSeverity.INFORMATION)
        .range(prefixRange).textAttributes(DefaultLanguageHighlighterColors.KEYWORD).create();
    holder.newSilentAnnotation(HighlightSeverity.INFORMATION)
        .range(separatorRange).textAttributes(SimpleSyntaxHighlighter.SEPARATOR).create();


    // Get the list of properties for given key
    String key = value.substring(SIMPLE_PREFIX_STR.length() + SIMPLE_SEPARATOR_STR.length());
    List<SimpleProperty> properties = SimpleUtil.findProperties(element.getProject(), key);
    if (properties.isEmpty()) {
      holder.newAnnotation(HighlightSeverity.ERROR, "Unresolved property")
          .range(keyRange)
          .highlightType(ProblemHighlightType.LIKE_UNKNOWN_SYMBOL)
          // ** Tutorial step 19. - Add a quick fix for the string containing possible properties
          .withFix(new SimpleCreatePropertyQuickFix(key))
          .create();
    } else {
      // Found at least one property, force the text attributes to Simple syntax value character
      holder.newSilentAnnotation(HighlightSeverity.INFORMATION)
          .range(keyRange).textAttributes(SimpleSyntaxHighlighter.VALUE).create();
    }
  }