/// <summary>
/// 开始解析标签数据
/// </summary>
/// <param name="ownerTemplate">宿主模板</param>
/// <param name="container">标签的容器</param>
/// <param name="tagStack">标签堆栈</param>
/// <param name="text"></param>
/// <param name="match"></param>
/// <param name="isClosedTag">是否闭合标签</param>
/// <returns>如果需要继续处理EndTag则返回true.否则请返回false</returns>
internal override bool ProcessBeginTag(Template ownerTemplate, Tag container, Stack <Tag> tagStack, string text, ref Match match, bool isClosedTag)
{
if (this.Values.Count == 0)
{
throw new ParserException(string.Format("{0}标签中缺少value属性", this.TagName));
}
//判断标签的容器是否为IfTag标签
if (!(container is IfTag))
{
throw new ParserException(string.Format("未找到和{0}标签对应的{1}标签", this.TagName, this.EndTagName));
}
IfTag ifTag = (IfTag)container;
//判断此条件是否带var属性.如果不带则设置为if的条件
if (this.VarExpression == null)
{
this.VarExpression = ifTag.VarExpression;
}
//加入到If标签的ElseIf队列
ifTag.AddElseCondition(this);
return(true);
}
/// <summary>
/// 克隆当前元素到新的宿主模板
/// </summary>
/// <param name="ownerTemplate"></param>
/// <returns></returns>
internal override Element Clone(Template ownerTemplate)
{
IfTag tag = new IfTag(ownerTemplate);
this.CopyTo((IfConditionTag)tag);
tag.Else = this.Else == null ? null : (ElseTag)(this.Else.Clone(ownerTemplate));
foreach (IfConditionTag elseTag in this.ElseIfs)
{
tag.AddElseCondition((IfConditionTag)elseTag.Clone(ownerTemplate));
}
return(tag);
}
/// <summary>
/// 解析标签数据
/// </summary>
/// <param name="ownerTemplate">宿主模板</param>
/// <param name="container">标签的容器</param>
/// <param name="tagStack">标签堆栈</param>
/// <param name="text"></param>
/// <param name="match"></param>
/// <param name="isClosedTag">是否闭合标签</param>
/// <returns>如果需要继续处理EndTag则返回true.否则请返回false</returns>
internal override bool ProcessBeginTag(Template ownerTemplate, Tag container, Stack <Tag> tagStack, string text, ref Match match, bool isClosedTag)
{
//判断标签的容器是否为IfTag标签
if (!(container is IfTag))
{
throw new ParserException(string.Format("未找到和{0}标签对应的{1}标签", this.TagName, this.EndTagName));
}
IfTag ifTag = (IfTag)container;
if (ifTag.Else != null)
{
throw new ParserException(string.Format("{0}标签不能定义多个{1}标签", this.EndTagName, this.TagName));
}
//加入到If标签的Else节点
ifTag.Else = this;
return(true);
}
