/// <summary>
/// Reads the next tag from the tokens.
/// </summary>
private ITag Read()
{
ITag t = null;
if (IsTagStart())
{
Token t1, t2;
t1 = t2 = GetToken();
TokenCollection tc = new TokenCollection();
if (t1 == null)
{
return(null);
}
do
{
this.index++;
t2.Next = GetToken();
t2 = t2.Next;
if (t2 == null)
{
break;
}
tc.Add(t2);
} while (!IsTagEnd());
if (tc.Last != null && (tc.Last.TokenKind == TokenKind.TagEnd))
{
tc.Remove(tc.Last);
}
this.index++;
//if (tc.Count == 1 && tc[0] != null && tc[0].TokenKind == TokenKind.Comment)
//{
// return new TextTag();
//}
try
{
t = Read(tc);
}
catch (TemplateException)
{
throw;
}
catch (System.Exception e)
{
throw new ParseException($"Parse error:{tc.ToString()}\r\nError message:{e.Message}", tc.First.BeginLine, tc.First.BeginColumn);//标签分析异常
}
if (t != null)
{
t.FirstToken = t1;
if (t.Children.Count == 0 || t.LastToken == null || t2.CompareTo(t.LastToken) > 0)
{
t.LastToken = t2;
}
}
else
{
throw new ParseException($"Unexpected tag: {tc.ToString()}", tc.First.BeginLine, tc.First.BeginColumn); //未知的标签
}
}
else
{
t = new TextTag();
t.FirstToken = GetToken();
t.LastToken = null;
this.index++;
}
return(t);
}
