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2025-06-07 17:43:34 +08:00
using System;
using System.Text;
namespace FairyGUI.Utils
{
/// <summary>
///
/// </summary>
public class XMLUtils
{
public static string DecodeString(string aSource)
{
int len = aSource.Length;
StringBuilder sb = new StringBuilder();
int pos1 = 0, pos2 = 0;
while (true)
{
pos2 = aSource.IndexOf('&', pos1);
if (pos2 == -1)
{
sb.Append(aSource.Substring(pos1));
break;
}
sb.Append(aSource.Substring(pos1, pos2 - pos1));
pos1 = pos2 + 1;
pos2 = pos1;
int end = Math.Min(len, pos2 + 10);
for (; pos2 < end; pos2++)
{
if (aSource[pos2] == ';')
break;
}
if (pos2 < end && pos2 > pos1)
{
string entity = aSource.Substring(pos1, pos2 - pos1);
int u = 0;
if (entity[0] == '#')
{
if (entity.Length > 1)
{
if (entity[1] == 'x')
u = Convert.ToInt16(entity.Substring(2), 16);
else
u = Convert.ToInt16(entity.Substring(1));
sb.Append((char)u);
pos1 = pos2 + 1;
}
else
sb.Append('&');
}
else
{
switch (entity)
{
case "amp":
u = 38;
break;
case "apos":
u = 39;
break;
case "gt":
u = 62;
break;
case "lt":
u = 60;
break;
case "nbsp":
u = 32;
break;
case "quot":
u = 34;
break;
}
if (u > 0)
{
sb.Append((char)u);
pos1 = pos2 + 1;
}
else
sb.Append('&');
}
}
else
{
sb.Append('&');
}
}
return sb.ToString();
}
private static string[] ESCAPES = new string[] {
"&", "&amp;",
"<", "&lt;",
">", "&gt;",
"'", "&apos;",
"\"", "&quot;",
"\t", "&#x9;",
"\n", "&#xA;",
"\r", "&#xD;"
};
public static void EncodeString(StringBuilder sb, int start, bool isAttribute = false)
{
int count;
int len = isAttribute ? ESCAPES.Length : 6;
for (int i = 0; i < len; i += 2)
{
count = sb.Length - start;
sb.Replace(ESCAPES[i], ESCAPES[i + 1], start, count);
}
}
public static string EncodeString(string str, bool isAttribute = false)
{
if (string.IsNullOrEmpty(str))
return "";
else
{
StringBuilder sb = new StringBuilder(str);
EncodeString(sb, 0);
return sb.ToString();
}
}
}
}