List <HtmlAttribute> GetAttributes(ref bool isSingle)
{
List <HtmlAttribute> attributes = new List <HtmlAttribute> ();
TextTokenizer.MoveNext();
while (true)
{
if (IsEnd(ref isSingle))
{
break;
}
switch (TextTokenizer.Current.Type)
{
case HtmlTokenType.String:
HtmlAttribute attribute = new HtmlAttribute(TextTokenizer.Current);
attributes.Add(attribute);
TextTokenizer.MoveNext();
if (IsEnd(ref isSingle))
{
return(attributes);
}
switch (TextTokenizer.Current.Type)
{
case HtmlTokenType.EqualSign:
TextTokenizer.MoveNext();
switch (TextTokenizer.Current.Type)
{
case HtmlTokenType.String:
attribute.Values = new List <string> ();
string value = HtmlAPI.Unescape(TextTokenizer.Current.String);
if (HtmlAPI.Equals(attribute.Name, HtmlKeyword.Class))
{
attribute.Values.AddRange(HtmlAPI.Split(value));
}
else
{
attribute.Values.Add(value);
}
TextTokenizer.MoveNext();
continue;
}
throw new HtmlTextReaderException <HtmlTokenType> (TextTokenizer, "属性值");
case HtmlTokenType.String:
continue;
default:
throw new HtmlTextReaderException <HtmlTokenType> (TextTokenizer, HtmlKeyword.EqualSign, HtmlKeyword.SingleTag, HtmlKeyword.RightAngleBracket);
}
default:
throw new HtmlTextReaderException <HtmlTokenType> (TextTokenizer, "属性名", HtmlKeyword.SingleTag, HtmlKeyword.RightAngleBracket);
}
}
return(attributes);
}
bool ReadNode(HtmlElement parentElement, out HtmlNode node, string endElementLocalName = null)
{
if (MoveNext())
{
switch (Current.Type)
{
case HtmlTagType.Define:
node = new HtmlDocumentType(Current.Attributes, parentElement);
return(true);
case HtmlTagType.Single:
node = new HtmlElement(Current.Name, Current.Attributes, parentElement);
return(true);
case HtmlTagType.Start: {
HtmlElement element = new HtmlElement(Current.Name, Current.Attributes, parentElement);
node = element;
if (HtmlAPI.IsContentTag(element.LocalName))
{
TextTokenizer.SkipIgnoreCharacters();
string text = TextTokenizer.ReadTo($"</{element.LocalName}>").TrimEnd();
if (text.Length > 0)
{
node.ChildNodes.Add(new HtmlText(text, element));
}
return(true);
}
Tags.Add(element.LocalName);
HtmlNode lastNode = null;
while (ReadNode(element, out HtmlNode childNode, element.LocalName))
{
if (childNode is null)
{
continue;
}
if (lastNode != null)
{
lastNode.NextSibling = childNode;
childNode.PreviousSibling = lastNode;
}
node.ChildNodes.Add(childNode);
lastNode = childNode;
}
return(true);
}
case HtmlTagType.End:
if (endElementLocalName != null && !HtmlAPI.Equals(Current.Name, endElementLocalName))
{
if (Tags.Contains(Current.Name))
{
Buffer.Push(Current);
}
else
{
node = null;
return(true);
}
}
if (Tags.Count > 0)
{
Tags.RemoveAt(Tags.Count - 1);
}
break;
case HtmlTagType.Text:
node = new HtmlText(HtmlAPI.Unescape(Current.Content), parentElement);
return(true);
case HtmlTagType.Comment:
node = new HtmlComment(Current.Content, parentElement);
return(true);
default:
throw new NotImplementedException(Current.Type.ToString());
}
}
node = null;
return(false);
}