Style.create constructor

Style.create(Iterable<Attribute> attributes)

Constructs a Style from an iterable of Attribute instances.

This factory constructor segregates the attributes into visual and variant attributes, initializing a new Style with these segregated collections.

Example:

final style = Style.create([attribute1, attribute2]);

Implementation

factory Style.create(Iterable<Attribute> attributes) {
  final applyVariants = <VariantAttribute>[];
  final styleList = <StyledAttribute>[];

  for (final attribute in attributes) {
    if (attribute is StyledAttribute) {
      styleList.add(attribute);
    } else if (attribute is VariantAttribute) {
      applyVariants.add(attribute);
    } else if (attribute is NestedStyleAttribute) {
      applyVariants.addAll(attribute.value.variants.values);
      styleList.addAll(attribute.value.styles.values);
    } else {
      throw UnsupportedError('Unsupported attribute type: $attribute');
    }
  }

  return Style._(
    styles: AttributeMap(styleList),
    variants: AttributeMap(applyVariants),
  );
}