/// <summary>
/// Returns an enumerable collection of <see cref="TreeNode"/> objects containing the nodes
/// of the tree sorted in prefix order.
/// </summary>
/// <param name="treeEntity">The tree entity from which to get the nodes.</param>
/// <returns>
/// An enumerable collection of <see cref="TreeNode"/> objects containing the nodes
/// of the tree sorted in prefix order.
/// </returns>
public static IEnumerable <TreeNode> GetPrefixTree(this TreeEntityBase treeEntity)
{
if (treeEntity is null)
{
throw new ArgumentNullException(nameof(treeEntity));
}
return(TreeEntityExtensions.GetPrefixTree(treeEntity.RootNode));
}
/// <summary>
/// Returns an enumerable collection of <see cref="TreeNode"/> objects containing the nodes
/// of the tree sorted in prefix order.
/// </summary>
/// <param name="node"><see cref="TreeNode"/> to start at.</param>
/// <returns>
/// An enumerable collection of <see cref="TreeNode"/> objects containing the nodes
/// of the tree sorted in prefix order.
/// </returns>
private static IEnumerable <TreeNode> GetPrefixTree(TreeNode?node)
{
if (node != null)
{
yield return(node);
foreach (TreeNode childNode in node.ChildNodes)
{
foreach (TreeNode subChildNode in TreeEntityExtensions.GetPrefixTree(childNode))
{
yield return(subChildNode);
}
}
}
}
