/// <summary>
/// Converts a raw string into a raw hexadecimal string literal, possibly encrypted.
/// </summary>
public static string ToHexStringLiteral(string text, PdfStringEncoding encoding, PdfStandardSecurityHandler securityHandler)
{
if (String.IsNullOrEmpty(text))
{
return("<>");
}
byte[] bytes;
switch (encoding)
{
case PdfStringEncoding.RawEncoding:
bytes = RawEncoding.GetBytes(text);
break;
case PdfStringEncoding.WinAnsiEncoding:
bytes = WinAnsiEncoding.GetBytes(text);
break;
case PdfStringEncoding.PDFDocEncoding:
bytes = DocEncoding.GetBytes(text);
break;
case PdfStringEncoding.Unicode:
//bytes = UnicodeEncoding.GetBytes(text);
bytes = RawUnicodeEncoding.GetBytes(text);
break;
default:
throw new NotImplementedException(encoding.ToString());
}
byte[] agTemp = FormatStringLiteral(bytes, encoding == PdfStringEncoding.Unicode, true, true, securityHandler);
return(RawEncoding.GetString(agTemp, 0, agTemp.Length));
}
///// <summary>
///// Encodes a string from a byte array. Each character gets the code of the corresponding byte.
///// </summary>
//public static string RawString(byte[] bytes, int offset, int length)
//{
// char[] chars = new char[length];
// for (int idx = offset, ch = 0; idx < offset + length; idx++, ch++)
// chars[ch] = (char)bytes[idx];
// return new string(chars, 0, length);
//}
//
//public static string RawString(byte[] bytes)
//{
// return RawString(bytes, 0, bytes.Length);
//}
#if true_
public static string EncodeAsLiteral(string text, bool unicode)
{
if (text == null || text == "")
{
return("<>");
}
StringBuilder pdf = new StringBuilder("");
if (!unicode)
{
byte[] bytes = WinAnsiEncoding.GetBytes(text);
int count = bytes.Length;
pdf.Append("(");
for (int idx = 0; idx < count; idx++)
{
char ch = (char)bytes[idx];
if (ch < 32)
{
switch (ch)
{
case '\n':
pdf.Append("\\n");
break;
case '\r':
pdf.Append("\\r");
break;
case '\t':
pdf.Append("\\t");
break;
case '\f':
pdf.Append("\\f");
break;
default:
pdf.Append(InvalidChar); // TODO
break;
}
}
else
{
switch (ch)
{
case '(':
pdf.Append("\\(");
break;
case ')':
pdf.Append("\\)");
break;
case '\\':
pdf.Append("\\\\");
break;
default:
pdf.Append(ch);
break;
}
}
}
pdf.Append(')');
}
else
{
pdf.Append("<");
byte[] bytes = UnicodeEncoding.GetBytes(text);
int count = bytes.Length;
for (int idx = 0; idx < count; idx += 2)
{
pdf.AppendFormat("{0:X2}{1:X2}", bytes[idx + 1], bytes[idx]);
if (idx != 0 && (idx % 48) == 0)
{
pdf.Append("\n");
}
}
pdf.Append(">");
}
return(pdf.ToString());
}