setRoutes method

EditResult setRoutes(Iterable<String> ids, { ConnectorRoute? route, double? portSpacing, Map<String, Object?> options = const {}, })

Validates and changes several connectors with one resolution.

Implementation

EditResult setRoutes(
  Iterable<String> ids, {
  ConnectorRoute? route,
  double? portSpacing,
  Map<String, Object?> options = const {},
}) {
  final routes = store.diagram.resolver.registry.routes;
  if (route != null && !routes.available.contains(route)) {
    return const EditResult.denied(
      code: DiagramDenialCode.unsupportedOperation,
      reason: 'This connector route is not installed.',
    );
  }
  final steps = <ReplaceElementStep>[];
  for (final id in ids.toSet()) {
    final before = store.state.document.elementById(id);
    if (before is! ConnectorElement) {
      return EditResult.denied(
        code: DiagramDenialCode.unavailableTarget,
        reason: 'No connector $id',
      );
    }
    var after = before;
    if (route != null && route != before.route) {
      after = after.copyWith(
        route: route,
        controlPoints: const [],
        routedPoints: const [],
        routeOptions: const {},
      );
    }
    if (portSpacing != null && portSpacing != after.terminalGap) {
      after = after.copyWith(
        terminalGap: portSpacing,
        routedPoints: const [],
      );
    }
    final schema = routes.optionsOf(after.route);
    for (final MapEntry(:key, :value) in options.entries) {
      final option = schema[key];
      final reason = option == null
          ? 'This route has no option "$key".'
          : value == null || option.field.accepts(value)
          ? null
          : 'Route option "$key" is not a valid value.';
      if (reason != null) {
        return EditResult.denied(
          code: DiagramDenialCode.unsupportedOperation,
          reason: reason,
        );
      }
      if (after.routeOptions[key] != value) {
        after = after
            .withRouteOption(key, value)
            .copyWith(routedPoints: const []);
      }
    }
    if (after != before) {
      steps.add(ReplaceElementStep(before: before, after: after));
    }
  }
  if (steps.isEmpty) return const EditResult.allow();
  return store.edits.dispatch(
    DiagramTransaction(label: 'Change connector route', steps: steps),
  );
}