/// <summary>
/// Overrides the base implementation to write strings that are encrypted if they are not a part of an object stream
/// </summary>
/// <param name="value"></param>
/// <param name="encoding"></param>
public override void WriteStringLiteral(string value, Scryber.FontEncoding encoding)
{
PDFObjectEncryptionStream encrypting = this.AssertEncrypterStream;
if (encrypting.InsideStream == false)
{
//If we are not in an object stream, then we want to encrypt the text
if (encrypting.HasEncrypter == false)
{
encrypting.Encrypter = this.CreateEncryptionFilter(encrypting.ObjectRef);
}
byte[] all = GetStringBytes(value, encoding);
all = encrypting.Encrypter.FilterStream(all);
this.WriteStringHex(all);
}
else
{
//We are in an object stream so don't do any encryption now - wait until we close the indirect object
base.WriteStringLiteral(value, encoding);
}
}
public override void WriteStringLiteral(string value, Scryber.FontEncoding encoding)
{
if (UseHex && encoding != FontEncoding.PDFDocEncoding)
{
//TODO Write encoding prefix
CurrentStream.Write(Constants.StartHexString);
value = ToHex(value, encoding);
CurrentStream.Write(value);
CurrentStream.Write(Constants.EndHexString);
}
else
{
Scryber.Text.PDFEncoding enc = Scryber.Text.PDFEncoding.GetEncoding(encoding);
CurrentStream.Write(Constants.StartString);
if (null != enc.Prefix && enc.Prefix.Length > 0)
{
CurrentStream.Write(enc.Prefix);
}
CurrentStream.Write(enc.GetBytes(value));
CurrentStream.Write(Constants.EndString);
}
}
//
// support methods
//
#region private byte[] GetStringBytes(string value, Scryber.FontEncoding encoding)
/// <summary>
/// Converts a string in the specified encoding into a byte[]
/// </summary>
/// <param name="value"></param>
/// <param name="encoding"></param>
/// <returns></returns>
private byte[] GetStringBytes(string value, Scryber.FontEncoding encoding)
{
Scryber.Text.PDFEncoding enc = Scryber.Text.PDFEncoding.GetEncoding(encoding);
byte[] all = enc.GetBytes(value);
return(all);
}
