/// <summary>
/// Replaces the child node oldChild with newChild node.
/// </summary>
/// <param name="newChild">
/// The new node to put in the child list.
/// </param>
/// <param name="oldChild">
/// The node being replaced in the list.
/// </param>
/// <returns>
/// The node replaced.
/// </returns>
public HtmlNode ReplaceChild(HtmlNode newChild, HtmlNode oldChild)
{
if (newChild == null)
{
return this.RemoveChild(oldChild);
}
if (oldChild == null)
{
return this.AppendChild(newChild);
}
int index = -1;
if (this.childnodes != null)
{
index = this.childnodes[oldChild];
}
if (index == -1)
{
throw new ArgumentException(HtmlDocument.HtmlExceptionRefNotChild);
}
if (this.childnodes != null)
{
this.childnodes.Replace(index, newChild);
}
this.OwnerDocument.SetIdForNode(null, oldChild.GetId());
this.OwnerDocument.SetIdForNode(newChild, newChild.GetId());
this.OuterChanged = true;
this.InnerChanged = true;
return newChild;
}
/// <summary>
/// Adds the specified node to the end of the list of children of this node.
/// </summary>
/// <param name="newChild">
/// The node to add. May not be null.
/// </param>
/// <returns>
/// The node added.
/// </returns>
public HtmlNode AppendChild(HtmlNode newChild)
{
if (newChild == null)
{
throw new ArgumentNullException("newChild");
}
this.ChildNodes.Append(newChild);
this.OwnerDocument.SetIdForNode(newChild, newChild.GetId());
this.OuterChanged = true;
this.InnerChanged = true;
return newChild;
}
/// <summary>
/// Inserts the specified node immediately before the specified reference node.
/// </summary>
/// <param name="newChild">
/// The node to insert. May not be <c>null</c> .
/// </param>
/// <param name="refChild">
/// The node that is the reference node. The newChild is placed before this node.
/// </param>
/// <returns>
/// The node being inserted.
/// </returns>
public HtmlNode InsertBefore(HtmlNode newChild, HtmlNode refChild)
{
if (newChild == null)
{
throw new ArgumentNullException("newChild");
}
if (refChild == null)
{
return this.AppendChild(newChild);
}
if (newChild == refChild)
{
return newChild;
}
int index = -1;
if (this.childnodes != null)
{
index = this.childnodes[refChild];
}
if (index == -1)
{
throw new ArgumentException(HtmlDocument.HtmlExceptionRefNotChild);
}
if (this.childnodes != null)
{
this.childnodes.Insert(index, newChild);
}
this.OwnerDocument.SetIdForNode(newChild, newChild.GetId());
this.OuterChanged = true;
this.InnerChanged = true;
return newChild;
}