query method

dynamic query(NodeQuery query, { int? maxDepth, })

Implementation

dynamic query(NodeQuery query, {int? maxDepth}) {
  NodeV3? k = this;

  int currentDepth = 0;

  while (k != null) {
    if (k.tag != null) {
      if (query.includedTypes.contains(QueryType.tag)) {
        if (query.includedValues.contains(k.tag!.name)) {
          return k.tag!.name;
        }
      }

      if (query.includedTypes.contains(QueryType.property)) {
        List<String> intersection = List<String>.from(query.includedValues);
        intersection.removeWhere(
          (element) => !k!.tag!.properties.containsKey(element),
        );

        if (intersection.isNotEmpty) {
          return k.tag!.properties[intersection.first];
        }
      }

      if (query.includedTypes.contains(QueryType.styleProperty)) {
        List<String> intersection = List<String>.from(query.includedValues);
        intersection.removeWhere(
          (element) => !k!.tag!.styleProperties.containsKey(element),
        );

        if (intersection.isNotEmpty) {
          return k.tag!.styleProperties[intersection.first];
        }
      }
    }

    k = k.parent;

    currentDepth++;

    if (currentDepth == maxDepth) {
      return null;
    }
  }
}