internal Stream ConvertWriteStreamFormat(Stream stream, Charset writeStreamCharset)
{
if (this.internalFormat == (InternalBodyFormat)this.format && (writeStreamCharset == null || this.charset == writeStreamCharset))
{
return(stream);
}
Charset charset = writeStreamCharset ?? this.charset;
TextConverter converter;
if (this.internalFormat == InternalBodyFormat.RtfCompressed)
{
stream = new ConverterStream(stream, new RtfToRtfCompressed(), ConverterStreamAccess.Write);
if (BodyFormat.Rtf == this.format)
{
return(stream);
}
converter = new TextToRtf
{
InputEncoding = charset.GetEncoding()
};
}
else if (this.internalFormat == InternalBodyFormat.Enriched)
{
converter = new HtmlToEnriched
{
InputEncoding = charset.GetEncoding(),
OutputEncoding = this.Encoding
};
}
else if (this.internalFormat == InternalBodyFormat.Html)
{
converter = new HtmlToHtml
{
InputEncoding = charset.GetEncoding(),
OutputEncoding = this.Encoding
};
}
else
{
converter = new TextToText
{
InputEncoding = charset.GetEncoding(),
OutputEncoding = this.Encoding
};
}
return(new ConverterStream(stream, converter, ConverterStreamAccess.Write));
}
public override Stream OpenReadStream(long start, long end)
{
base.ThrowIfDisposed();
BodyFormatConversionStorage.BodyFormatConversion conversion = BodyFormatConversionStorage.GetConversion(this.originalFormat, this.targetFormat);
TextConverter converter = null;
Encoding inputEncoding = null;
if (this.originalCharset != null)
{
inputEncoding = this.originalCharset.GetEncoding();
}
Encoding outputEncoding = null;
if (this.targetCharset != null)
{
outputEncoding = this.targetCharset.GetEncoding();
}
Stream stream = this.originalStorage.OpenReadStream(this.originalStart, this.originalEnd);
switch (conversion)
{
case BodyFormatConversionStorage.BodyFormatConversion.HtmlToText:
converter = new HtmlToText
{
InputEncoding = inputEncoding,
OutputEncoding = outputEncoding
};
break;
case BodyFormatConversionStorage.BodyFormatConversion.HtmlToEnriched:
converter = new HtmlToEnriched
{
InputEncoding = inputEncoding,
OutputEncoding = outputEncoding
};
break;
case BodyFormatConversionStorage.BodyFormatConversion.RtfCompressedToText:
stream = new ConverterStream(stream, new RtfCompressedToRtf(), ConverterStreamAccess.Read);
converter = new RtfToText
{
OutputEncoding = outputEncoding
};
break;
case BodyFormatConversionStorage.BodyFormatConversion.TextToText:
converter = new TextToText
{
InputEncoding = inputEncoding,
OutputEncoding = outputEncoding
};
break;
case BodyFormatConversionStorage.BodyFormatConversion.HtmlToHtml:
converter = new HtmlToHtml
{
InputEncoding = inputEncoding,
OutputEncoding = outputEncoding
};
break;
case BodyFormatConversionStorage.BodyFormatConversion.EnrichedToText:
converter = new EnrichedToText
{
InputEncoding = inputEncoding,
OutputEncoding = outputEncoding
};
break;
}
return(new ConverterStream(stream, converter, ConverterStreamAccess.Read));
}
