SourceEdit updateInList()

in lib/src/list_mutations.dart [15:58]
32 lines of code
9 McCabe index (conditional complexity)

SourceEdit updateInList(
    YamlEditor yamlEdit, YamlList list, int index, YamlNode newValue) {
  RangeError.checkValueInInterval(index, 0, list.length - 1);

  final currValue = list.nodes[index];
  var offset = currValue.span.start.offset;
  final yaml = yamlEdit.toString();
  String valueString;

  /// We do not use [_formatNewBlock] since we want to only replace the contents
  /// of this node while preserving comments/whitespace, while [_formatNewBlock]
  /// produces a string representation of a new node.
  if (list.style == CollectionStyle.BLOCK) {
    final listIndentation = getListIndentation(yaml, list);
    final indentation = listIndentation + getIndentation(yamlEdit);
    final lineEnding = getLineEnding(yaml);
    valueString = yamlEncodeBlockString(
        wrapAsYamlNode(newValue), indentation, lineEnding);

    /// We prefer the compact nested notation for collections.
    ///
    /// By virtue of [yamlEncodeBlockString], collections automatically
    /// have the necessary line endings.
    if ((newValue is List && (newValue as List).isNotEmpty) ||
        (newValue is Map && (newValue as Map).isNotEmpty)) {
      valueString = valueString.substring(indentation);
    } else if (isCollection(currValue) &&
        getStyle(currValue) == CollectionStyle.BLOCK) {
      valueString += lineEnding;
    }

    var end = getContentSensitiveEnd(currValue);
    if (end <= offset) {
      offset++;
      end = offset;
      valueString = ' ' + valueString;
    }

    return SourceEdit(offset, end - offset, valueString);
  } else {
    valueString = yamlEncodeFlowString(newValue);
    return SourceEdit(offset, currValue.span.length, valueString);
  }
}