/// <summary>
/// Removes given node from <see cref="Content"/>.
/// </summary>
/// <param name="node">Node to remove.</param>
/// <returns>Current container.</returns>
/// <exception cref="ArgumentNullException"></exception>
public Fb2Container RemoveContent(Fb2Node node)
{
if (node == null)
{
throw new ArgumentNullException(nameof(node));
}
if (!IsEmpty && content.Contains(node))
{
content.Remove(node);
node.Parent = null;
}
return(this);
}
/// <summary>
/// Adds given node to <see cref="Content"/>.
/// </summary>
/// <param name="node">Child node to add to Content.</param>
/// <returns>Current container.</returns>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="InvalidNodeException"></exception>
/// <exception cref="UnexpectedNodeException"></exception>
public Fb2Container AddContent(Fb2Node node)
{
if (node == null)
{
throw new ArgumentNullException(nameof(node));
}
if (!Fb2NodeFactory.IsKnownNode(node))
{
throw new InvalidNodeException(node);
}
var nodeName = node.Name;
var isTextNode = node is TextItem;
if (isTextNode && !CanContainText)
{
throw new UnexpectedNodeException(Name, nodeName);
}
if (!AllowedElements.Contains(nodeName) && !isTextNode)
{
throw new UnexpectedNodeException(Name, nodeName);
}
if (isTextNode)
{
return(TryMergeTextContent((node as TextItem) !.Content));
}
node.Parent = this;
if (node.NodeMetadata == null && NodeMetadata?.DefaultNamespace != null) // copy parent default namespace to prevent serialization issues
{
node.NodeMetadata = new Fb2NodeMetadata(NodeMetadata?.DefaultNamespace);
}
content.Add(node);
return(this);
}
private XNode ToXmlInternal(Fb2Node element) => element is TextItem textItem ? (XNode) new XText(textItem.Content) : element.ToXml();