static bool CheckLable(List <LableInfo> list, ref int index)
{
LableInfo tmp = list[index];
index++;
if (list[index].Type == 0)
{
if (!CheckLable(list, ref index))
{
return(false);
}
if (index >= list.Count)
{
return(false);
}
}
int c = list[index].Lable;
index++;
if (c == tmp.Lable)
{
return(true);
}
return(false);
}
/// <summary>
/// 删除富文本中的标签
/// </summary>
/// <param name="str">富文本</param>
/// <returns></returns>
public static string DeleteLabel(string str)
{
if (tmp == null)
{
tmp = new StringBuilder();
lables = new List <LableInfo>();
}
else
{
tmp.Clear();
lables.Clear();
}
int index = 0;
LableInfo lable = new LableInfo();
for (int i = 0; i < str.Length; i++)
{
if (GetLable(str, index, ref lable))
{
index = lable.Start + lable.Length;
lables.Add(lable);
}
else
{
break;
}
}
int c = lables.Count;
if (c % 2 > 0)//标签不是成对的
{
return(str);
}
index = 0;
for (int i = 0; i < lables.Count; i++)
{
if (index >= lables.Count)
{
break;
}
if (!CheckLable(lables, ref index))
{
return(str);
}
}
if (lables.Count == 0)
{
return(str);
}
int s = 0;
for (int i = 0; i < lables.Count; i++)
{
int a = lables[i].Start;
int l = lables[i].Length;
int len = a - s;
if (len > 0)
{
tmp.Append(str, s, len);
}
s = a + l;
}
int ol = str.Length - s;
if (ol > 0)
{
tmp.Append(str, s, ol);
}
return(tmp.ToString());
}
static bool GetLable(string str, int index, ref LableInfo info)
{
int s = str.IndexOf(Start, index);
if (s >= 0)
{
info.Start = s;
info.Length = 1;
int ss = s + 1;
if (ss < str.Length)
{
if (str[ss] == '/')//这是标签的结尾
{
for (int i = 0; i < LableEnd.Length; i++)
{
if (Compare(str, s, LableEnd[i]))
{
info.Start = s;
info.Length = LableEnd[i].Length;
info.Type = 1;
info.Lable = i;
return(true);
}
}
}
else
{
for (int i = 0; i < LableStart.Length; i++)
{
if (Compare(str, s, LableStart[i]))
{
int next = LableStart[i].Length;
char c = str[s + next];
info.Start = s;
info.Type = 0;
info.Lable = i;
if (c == equals)
{
if (i < 2)
{
info.Length = LableStart[i].Length + 1;
}
else
{
int e = str.IndexOf(end, s + LableStart[i].Length);
if (e >= 0)
{
info.Length = e - s + 1;
return(true);
}
else
{
return(false);
}
}
}
else if (c == end)
{
info.Length = LableStart[i].Length + 1;
}
return(true);
}
}
}
}
}
return(false);
}
