/// <summary>
/// 在指定位置添加节点
/// </summary>
/// <param name="container">要添加节点的容器</param>
/// <param name="index">要插入节点的位置</param>
/// <param name="node">要添加的节点</param>
/// <exception cref="System.InvalidOperationException">添加的节点与节点容器不属于同一个文档</exception>
public static TContainer Insert <TContainer>(this TContainer container, int index, IFreeNode node) where TContainer : IHtmlContainer
{
if (container == null)
{
throw new ArgumentNullException("container");
}
if (node == null)
{
throw new ArgumentNullException("node");
}
var fragment = container as HtmlFragment;
if (fragment != null)
{
fragment.AddNode(index, node);
return(container);
}
lock (container.SyncRoot)
{
if (!container.Document.Equals(node.Document))
{
throw new InvalidOperationException();
}
node.Into(container, index);
return(container);
}
}
/// <summary>
/// 替换指定节点
/// </summary>
/// <param name="oldNode">被替换的节点</param>
/// <param name="newNode">用于替换的节点</param>
/// <exception cref="System.InvalidOperationException">被替换的节点与用于替换的节点不属于同一个文档</exception>
public static IHtmlNode Replace(this IHtmlNode oldNode, IFreeNode newNode)
{
if (oldNode == null)
{
throw new ArgumentNullException("oldNode");
}
if (newNode == null)
{
throw new ArgumentNullException("newNode");
}
var container = oldNode.Container;
if (container == null)
{
throw new InvalidOperationException();
}
lock (container.SyncRoot)
{
var result = newNode.Into(container, oldNode.NodesIndexOfSelf());
oldNode.Remove();
return(result);
}
}