/// <summary>
/// 带变量字段的初始化
/// </summary>
/// <param name="ownerTemplate"></param>
/// <param name="varExp"></param>
internal DMEWeb_VariableTag(DMEWeb_Template ownerTemplate, DMEWeb_VariableExpression varExp)
: base(ownerTemplate)
{
//注册添加属性时触发事件.用于设置自身的某些属性值
this.Attributes = new DMEWeb_AttributeCollection(this);
this.Attributes.Adding += OnAddingAttribute;
this.VarExpression = varExp;
this.CallFunctions = new List<DMEWeb_IExpression>();
}
/// <summary>
/// 变量表达式
/// </summary>
/// <param name="parentExp"></param>
/// <param name="fieldName"></param>
/// <param name="isMethod"></param>
internal DMEWeb_VariableExpression(DMEWeb_VariableExpression parentExp, string fieldName, bool isMethod)
{
parentExp.NextExpression = this;
this.ParentExpression = parentExp;
this.VariableId = parentExp.VariableId;
this.FieldName = fieldName;
this.IsMethod = isMethod;
this.NeedCacheData = parentExp.NeedCacheData;
}
/// <summary>
/// 克隆表达式
/// </summary>
/// <param name="ownerTemplate"></param>
/// <returns></returns>
public DMEWeb_IExpression Clone(DMEWeb_Template ownerTemplate)
{
DMEWeb_VariableIdentity variableId = this.VariableId.Clone(ownerTemplate);
DMEWeb_VariableExpression exp = new DMEWeb_VariableExpression(variableId, this.FieldName, this.IsMethod, this.NeedCacheData);
if (this.NextExpression != null)
{
exp.NextExpression = (DMEWeb_VariableExpression)(this.NextExpression.Clone(ownerTemplate));
exp.NextExpression.ParentExpression = exp;
}
return exp;
}
/// <summary>
/// 构建变量的字段列表
/// </summary>
/// <param name="variableId"></param>
/// <param name="match"></param>
/// <param name="needCacheData"></param>
/// <returns></returns>
internal static DMEWeb_VariableExpression CreateVariableExpression(DMEWeb_VariableIdentity variableId, Match match, bool needCacheData)
{
//解析变量字段列表
DMEWeb_VariableExpression field = new DMEWeb_VariableExpression(variableId, needCacheData);
CaptureCollection fields = match.Groups["field"].Captures;
CaptureCollection methods = match.Groups["method"].Captures;
DMEWeb_VariableExpression item = field;
for (var i = 0; i < fields.Count; i++)
{
string fieldName = fields[i].Value;
DMEWeb_VariableExpression exp = new DMEWeb_VariableExpression(item, fieldName, !string.IsNullOrEmpty(methods[i].Value));
item = exp;
}
return field;
}
