createProviderNode method

ProviderNode createProviderNode(int childNodeCount, List<ProviderNode> children)

Creates a ProviderNode for this element.

Note that childNodeCount can be greater than children.length, as it counts nodes that can't produce providers such as HTML text and comments.

Implementation

ProviderNode createProviderNode(
    int childNodeCount, List<ProviderNode> children) {
  final providers = <ProviderInstance>[];
  final nodeIndex = this.nodeIndex!;
  if (childNodeCount == 0) {
    // If there aren't any child nodes, both regular and view providers are
    // injectable within the same range ([nodeIndex, nodeIndex]), so they can
    // both be added to the same `ProviderNode`.
    _createProviderInstances(providers, providers);
  } else {
    // Otherwise view providers must be added to their own `ProviderNode`.
    // This node is added as a child because its restricted range ([nodeIndex,
    // nodeIndex]) lies within the range for normal providers ([nodeIndex,
    // nodeIndex + childNodeCount]).
    final viewProviders = <ProviderInstance>[];
    _createProviderInstances(providers, viewProviders);
    if (viewProviders.isNotEmpty) {
      children.add(ProviderNode(
        nodeIndex,
        nodeIndex,
        providers: viewProviders,
      ));
    }
  }
  return ProviderNode(
    nodeIndex,
    nodeIndex + childNodeCount,
    providers: providers,
    children: children,
  );
}