check method

@override List<A11yViolation> check(List<A11ySemanticsNodeInfo> nodes)

Inspects nodes — a snapshot captured by SemanticsTreeWalker — and returns any violations found.

Implementation

@override
List<A11yViolation> check(List<A11ySemanticsNodeInfo> nodes) {
  final violations = <A11yViolation>[];

  for (final node in nodes) {
    if (node.isHidden || node.isTextField || !node.isInteractive) continue;
    if (node.label.isNotEmpty ||
        node.value.isNotEmpty ||
        node.tooltip.isNotEmpty) {
      continue;
    }

    violations.add(
      A11yViolation(
        ruleId: id,
        severity: A11ySeverity.error,
        bounds: node.rect,
        message:
            'Interactive element has no label, value, or tooltip for a '
            'screen reader to announce.',
        suggestedFix:
            'Add Semantics(label: \'...\', child: ...) around the widget, '
            'or a semanticLabel/label parameter if the widget already '
            'accepts one.',
      ),
    );
  }

  return violations;
}