string ProcessTagFunction(TagFunction tagF)
{
return EvalTagFunction(tagF).ToString();
}
/// <summary>
/// 读取Tag
/// </summary>
/// <returns></returns>
Tag ReadTag()
{
Continue(Token.TokenKind.TagStart);
Token tagID = Continue(Token.TokenKind.ID);
Tag tag;
if (currentToken.Kind == Token.TokenKind.Colon)
{
Continue(Token.TokenKind.Colon);
Token token = Continue(Token.TokenKind.ID);
tag = new TagFunction(tagID.Line, tagID.Col, tagID.Text, token.Text);
}
else
tag = new Tag(tagID.Line, tagID.Col, tagID.Text);
tag.Attributes = ReadAttributes();
////test
//if (currentToken.Kind == Token.TokenKind.TextData)
//{
// Token template = Continue(Token.TokenKind.TextData);
// tag.InnerElements.Add(new StringExpression(currentToken.Line, currentToken.Col, template.Text));
//}
return tag;
}
/// <summary>
/// 执行内置标签函数
/// </summary>
/// <param name="tagF"></param>
/// <returns></returns>
object EvalTagFunction(TagFunction tagF)
{
Dictionary<string, object> temp = new Dictionary<string, object>();
foreach (TagAttribute tagA in tagF.Attributes)
{
temp.Add(tagA.Name, EvalExpression(tagA.Expression));
}
if (tagF.InnerElements.Count > 0)
{
Template t = Template.FromElements(tagF.InnerElements);
temp.Add("template", t);
}
TagFunctionInvoker invoker = new TagFunctionInvoker();
return invoker.Invoke(tagF.FunctionName, temp);
}