/// <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);
}
/// <summary>
/// Container node loading mechanism. Loads attributes and sequentially calls `Load` on all child nodes.
/// </summary>
/// <param name="node">Node to load as Fb2Container</param>
/// <param name="preserveWhitespace">Indicates if whitespace chars (\t, \n, \r) should be preserved. By default `false`.</param>
/// <param name="loadUnsafe">Indicates whether "Unsafe" children should be loaded. By default `true`. </param>
public override void Load(
[In] XNode node,
[In] Fb2Container?parentNode = null,
bool preserveWhitespace = false,
bool loadUnsafe = true,
bool loadNamespaceMetadata = true)
{
base.Load(node, parentNode, preserveWhitespace, loadUnsafe, loadNamespaceMetadata);
var element = node as XElement;
if (element == null || element.IsEmpty)
{
return;
}
var nodes = element.Nodes()
.Where(n =>
{
if (n.NodeType == XmlNodeType.Text)
{
return(true);
}
var isElement = n.NodeType == XmlNodeType.Element;
if (!isElement)
{
return(false);
}
var elementNode = n as XElement;
var nodeLocalName = elementNode.Name.LocalName;
return(!nodeLocalName.EqualsIgnoreCase(ElementNames.FictionText) &&
Fb2NodeFactory.IsKnownNodeName(nodeLocalName));
})
.ToList();
var nodesCount = nodes.Count;
if (nodesCount == 0)
{
return;
}
for (int i = 0; i < nodesCount; i++)
{
var validNode = nodes[i];
string localName = validNode.NodeType == XmlNodeType.Element ?
((XElement)validNode).Name.LocalName.ToLowerInvariant() :
ElementNames.FictionText;
var isUnsafe = validNode.NodeType == XmlNodeType.Text ?
!CanContainText :
!AllowedElements.Contains(localName);
if (isUnsafe && !loadUnsafe)
{
continue;
}
var elem = Fb2NodeFactory.GetNodeByName(localName);
elem.Load(validNode, this, preserveWhitespace, loadUnsafe, loadNamespaceMetadata);
elem.IsUnsafe = isUnsafe;
content.Add(elem);
}
}