/// <summary>
/// 分析 HTML 文本并创建文档
/// </summary>
/// <param name="html">HTML 文本</param>
/// <param name="url">文档的 URL</param>
/// <returns>分析好的 HTML 文档</returns>
public virtual IHtmlDocument Parse(string html, Uri url)
{
if (html == null)
{
throw new ArgumentNullException("html");
}
if (url != null && !url.IsAbsoluteUri)
{
throw new ArgumentException("必须是绝对URI", "url");
}
lock ( SyncRoot )
{
Initialize();
Document = DomProvider.CreateDocument(url);
if (!string.IsNullOrEmpty(html))
{
ContainerStack.Push(Document);
ParseInternal(html);
}
if (Document.HtmlSpecification == null)//若始终没能找到 DTD 声明，则设置默认的规范
{
DomProvider.SetHtmlSpecification(Document, null);
}
return(CompleteDocument(Document));
}
}
/// <summary>
/// 根据 DTD 声明设置相应的 HTML 规范
/// </summary>
/// <param name="doctype">DTD 声明</param>
/// <returns>所适用的 HTML 规范</returns>
protected virtual void SetHtmlSpecification(HtmlDoctypeDeclaration doctype)
{
if (HtmlSpecification == null)
{
var declaration = doctype.IfNull(null, d => d.Declaration);
SetHtmlSpecification(DomProvider.SetHtmlSpecification(Document, declaration));
}
}