private bool WriteModifiedProperty(TnefWriter writer, TnefReader reader, TnefPropertyTag propertyTag, object value, bool forceUnicode, ref bool startAttribute, byte[] scratchBuffer)
{
TnefPropertyReader propertyReader = reader.PropertyReader;
TnefAttributeTag attributeTag = reader.AttributeTag;
TnefAttributeLevel attributeLevel = reader.AttributeLevel;
StoragePropertyValue storagePropertyValue = value as StoragePropertyValue;
if (storagePropertyValue != null)
{
if (this.attachmentData != null && this.attachmentData.EmbeddedMessage != null && propertyReader.IsEmbeddedMessage)
{
using (TnefReader embeddedMessageReader = propertyReader.GetEmbeddedMessageReader())
{
TnefPropertyBag.StartAttributeIfNecessary(writer, attributeTag, attributeLevel, ref startAttribute);
writer.StartProperty(propertyTag);
EmailMessage embeddedMessage = this.attachmentData.EmbeddedMessage;
PureTnefMessage pureTnefMessage = embeddedMessage.PureTnefMessage;
Charset textCharset = pureTnefMessage.TextCharset;
using (TnefWriter embeddedMessageWriter = writer.GetEmbeddedMessageWriter(textCharset.CodePage))
{
pureTnefMessage.WriteMessage(embeddedMessageReader, embeddedMessageWriter, scratchBuffer);
}
return(true);
}
}
using (Stream readStream = storagePropertyValue.GetReadStream())
{
int num = readStream.Read(scratchBuffer, 0, scratchBuffer.Length);
if (num > 0)
{
propertyTag = storagePropertyValue.PropertyTag;
if (propertyTag.ValueTnefType == TnefPropertyType.Unicode && TnefPropertyBag.IsLegacyAttribute(attributeTag))
{
return(false);
}
TnefPropertyBag.StartAttributeIfNecessary(writer, attributeTag, attributeLevel, ref startAttribute);
writer.StartProperty(propertyTag);
do
{
writer.WritePropertyRawValue(scratchBuffer, 0, num);
num = readStream.Read(scratchBuffer, 0, scratchBuffer.Length);
}while (num > 0);
}
return(true);
}
}
if (propertyTag.ValueTnefType == TnefPropertyType.String8 && forceUnicode)
{
if (TnefPropertyBag.IsLegacyAttribute(attributeTag))
{
return(false);
}
TnefPropertyBag.StartAttributeIfNecessary(writer, attributeTag, attributeLevel, ref startAttribute);
writer.WriteProperty(propertyTag.ToUnicode(), value);
}
else
{
TnefPropertyBag.StartAttributeIfNecessary(writer, attributeTag, attributeLevel, ref startAttribute);
writer.WriteProperty(propertyTag, value);
}
return(true);
}
private void LoadProperty(TnefPropertyReader propertyReader, DataStorage tnefStorage, long tnefStart, long tnefEnd, TnefAttributeLevel level, int embeddingDepth, Charset binaryCharset)
{
TnefPropertyTag propertyTag = propertyReader.PropertyTag;
if (propertyTag.IsMultiValued)
{
return;
}
if (TnefPropertyType.Null == propertyTag.ValueTnefType)
{
return;
}
if (propertyReader.IsNamedProperty)
{
TnefNameId propertyNameId = propertyReader.PropertyNameId;
TnefNameTag key = new TnefNameTag(propertyNameId, propertyTag.ValueTnefType);
if (this.supportedNamedProperties.ContainsKey(key))
{
if (propertyReader.IsLargeValue)
{
return;
}
this[this.GetIndex(propertyNameId)] = propertyReader.ReadValue();
}
return;
}
if (!this.supportedProperties.ContainsKey(propertyTag))
{
return;
}
TnefPropertyId id = propertyTag.Id;
int index = this.GetIndex(id);
if (TnefPropertyId.Body == id || TnefPropertyId.RtfCompressed == id || TnefPropertyId.BodyHtml == id)
{
tnefStart += (long)propertyReader.RawValueStreamOffset;
tnefEnd = tnefStart + (long)propertyReader.RawValueLength;
this[index] = new StoragePropertyValue(propertyTag, tnefStorage, tnefStart, tnefEnd);
return;
}
if (TnefPropertyId.AttachData == id)
{
tnefStart += (long)propertyReader.RawValueStreamOffset;
tnefEnd = tnefStart + (long)propertyReader.RawValueLength;
this[index] = new StoragePropertyValue(propertyTag, tnefStorage, tnefStart, tnefEnd);
if (!propertyReader.IsEmbeddedMessage)
{
return;
}
if (++embeddingDepth > 100)
{
throw new MimeException(EmailMessageStrings.NestingTooDeep(embeddingDepth, 100));
}
using (TnefReader embeddedMessageReader = propertyReader.GetEmbeddedMessageReader())
{
PureTnefMessage pureTnefMessage = new PureTnefMessage(this.attachmentData, tnefStorage, tnefStart, tnefEnd);
pureTnefMessage.Load(embeddedMessageReader, embeddingDepth, binaryCharset);
EmailMessage embeddedMessage = new EmailMessage(pureTnefMessage);
this.attachmentData.EmbeddedMessage = embeddedMessage;
return;
}
}
if (propertyReader.IsLargeValue)
{
return;
}
if (TnefPropertyId.InternetCPID == id)
{
if (TnefPropertyType.Long == propertyTag.TnefType)
{
int num = propertyReader.ReadValueAsInt32();
this[index] = num;
return;
}
}
else
{
this[index] = propertyReader.ReadValue();
}
}
