protected internal HTMLElementNode InsertChild(int index, IHTMLElement nodeData)
{
var newNode = new HTMLElementNode(this, nodeData);
Children.Insert(index, newNode);
return(newNode);
}
protected internal HTMLElementNode AddChild(IHTMLElement nodeData)
{
var newNode = new HTMLElementNode(this, nodeData);
Children.Add(newNode);
return(newNode);
}
/// <summary>
/// Returns a collection containing this element and all descendant elements.
/// </summary>
public static IEnumerable <HTMLElementNode> DescendantsAndSelf(this HTMLElementNode adapter)
{
yield return(adapter);
foreach (HTMLElementNode child in adapter.Descendants())
{
yield return(child);
}
}
/// <summary>
/// Returns a collection of ancestor elements.
/// </summary>
public static IEnumerable <HTMLElementNode> AncestorsAndSelf(this HTMLElementNode adapter)
{
yield return(adapter);
foreach (HTMLElementNode child in adapter.Ancestors())
{
yield return(child);
}
}
/// <summary>
/// Returns a collection of child elements.
/// </summary>
public static IEnumerable <HTMLElementNode> Elements(this HTMLElementNode adapter)
{
if (adapter == null)
{
throw new ArgumentNullException(nameof(adapter));
}
foreach (HTMLElementNode child in adapter.Children)
{
yield return(child);
}
}
public HTMLElementNode(HTMLElementNode parent, IHTMLElement nodeData)
{
Element = nodeData;
if (parent == null)
{
Parent = this;
}
else
{
Parent = parent;
}
Children = new List <HTMLElementNode>();
}
/// <summary>
/// Returns a collection of ancestor elements.
/// </summary>
public static IEnumerable <HTMLElementNode> Ancestors(this HTMLElementNode adapter)
{
if (adapter == null)
{
throw new ArgumentNullException(nameof(adapter));
}
var parent = adapter.Parent;
while (parent != null && parent != parent.Parent)
{
yield return(parent);
parent = parent.Parent;
}
}
protected internal void RemoveChild(HTMLElementNode nodeData)
{
Children.Remove(nodeData);
}
/// <summary>
/// Returns a collection of descendant elements.
/// </summary>
public static IEnumerable <HTMLElementNode> Descendants <T>(this HTMLElementNode adapter)
{
return(adapter.Descendants().Where(i => i is T));
}
public HTMLBuilder Parent()
{
lastNode = lastNode.Parent;
return(this);
}
private void WriteTree(StringBuilder sb, HTMLElementNode root, int nestedLevel = 0)
{
if (root != null)
{
string content = "";
var elementType = root.Element.GetType();
if (elementType == typeof(HTMLEmpty) || !Settings.WriteComments & elementType == typeof(HTMLComment))
{
foreach (HTMLElementNode child in root.Children)
{
WriteTree(sb, child, nestedLevel);
}
}
else if (root.Children.Count == 0 && string.IsNullOrEmpty(root.Element.Content) && HTMLTags.SelfClosing.Contains(root.Element.Tag().ToLowerInvariant()))
{
sb.AppendLine(new string(' ', nestedLevel * Settings.TabSize) + root.Element.Empty(Settings.EnforceProperCase));
}
else
{
sb.Append(new string(' ', nestedLevel * Settings.TabSize) + root.Element.Open(Settings.EnforceProperCase));
if (root.Children.Count > 0 | root.Element.IsMultiLine)
{
sb.AppendLine();
}
if (!string.IsNullOrEmpty(root.Element.Content))
{
if (root.Children.Count > 0 | root.Element.IsMultiLine)
{
using (var sr = new System.IO.StringReader(root.Element.Content))
{
while (sr.Peek() != -1)
{
content += new string(' ', (nestedLevel + 1) * Settings.TabSize) + sr.ReadLine() + Environment.NewLine;
}
}
}
else
{
content += root.Element.Content;
}
if (root.Element.ContentPosition == (int)ContentPosition.BeforeElements)
{
sb.Append(content);
}
}
foreach (HTMLElementNode child in root.Children)
{
if (Settings.IndentHeaderAndBodyTags || !Settings.IndentHeaderAndBodyTags && !((root.Element.Tag(true) ?? "") == "html"))
{
nestedLevel += 1;
}
WriteTree(sb, child, nestedLevel);
if (Settings.IndentHeaderAndBodyTags || !Settings.IndentHeaderAndBodyTags && !((root.Element.Tag(true) ?? "") == "html"))
{
nestedLevel -= 1;
}
}
if ((int)root.Element.ContentPosition == (int)ContentPosition.AfterAlements && !string.IsNullOrEmpty(content))
{
sb.Append(content);
}
if (root.Children.Count == 0 && !root.Element.IsMultiLine)
{
sb.AppendLine(root.Element.Close(Settings.EnforceProperCase));
}
else
{
sb.AppendLine(new string(' ', nestedLevel * Settings.TabSize) + root.Element.Close(Settings.EnforceProperCase));
}
}
}
}
