private void ProcessBeginTag(Match match)
{
string tagName = match.Groups["tagName"].Value;
bool selfClosed = match.Groups["selfClosed"].Success;
if (HtmlSpecification.selfCloseTags.Contains(tagName, StringComparer.OrdinalIgnoreCase))
{
selfClosed = true;
}
//检查父标签是否可选结束标记，并相应处理
{
var element = containerStack.Peek() as DomElement;
if (element != null && HtmlSpecification.optionalCloseTags.Contains(element.Name, StringComparer.OrdinalIgnoreCase))
{
if (HtmlSpecification.ImmediatelyClose(element.Name, tagName))
{
containerStack.Pop();
}
}
}
//处理所有属性
var attributes = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
foreach (Capture capture in match.Groups["attribute"].Captures)
{
string name = capture.FindCaptures(match.Groups["attrName"]).Single().Value;
string value = capture.FindCaptures(match.Groups["attrValue"]).Select(c => c.Value).SingleOrDefault();
value = HtmlEncoding.HtmlDecode(value);
if (attributes.ContainsKey(name))
{
continue;
}
attributes.Add(name, value);
}
//加入容器堆栈。
{
var element = CreateElement(tagName, attributes);
if (!selfClosed)
{
containerStack.Push(element);
}
}
}
/// <summary>
/// 处理元素开始标签
/// </summary>
/// <param name="beginTag">开始标签信息</param>
/// <returns>处理过程中所创建的元素对象，若不支持则返回 null</returns>
protected virtual IHtmlElement ProcessBeginTag(HtmlBeginTag beginTag)
{
string tagName = beginTag.TagName;
bool selfClosed = beginTag.SelfClosed;
//检查是否为自结束标签，并作相应处理
if (IsSelfCloseElement(beginTag))
{
selfClosed = true;
}
//检查是否为CData标签，并作相应处理
if (IsCDataElement(beginTag))
{
Reader.EnterCDataMode(tagName.ToLowerInvariant());
}
//检查父级是否可选结束标记，并作相应处理
{
var element = CurrentContainer as IHtmlElement;
if (element != null && HtmlSpecification.optionalCloseTags.Contains(element.Name, StringComparer.OrdinalIgnoreCase))
{
if (ImmediatelyClose(tagName, element))
{
ContainerStack.Pop();
}
}
}
//处理所有属性
var attributes = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
foreach (var a in beginTag.Attributes)
{
string name = a.Name;
string value = a.Value;
if (value != null)
{
value = HtmlEncoding.HtmlDecode(value);
}
if (attributes.ContainsKey(name))//重复的属性名，只取第一个
{
continue;
}
attributes.Add(name, value);
}
//创建元素
{
var element = CreateElement(tagName, attributes);
//加入容器堆栈
if (!selfClosed)
{
ContainerStack.Push(element);
}
return(element);
}
}
