/// <summary>
/// Extracts a OLE v1.0 object from the given <paramref name="stream"/>
/// </summary>
/// <param name="stream"></param>
/// <param name="outputFolder">The output folder</param>
internal static string ExtractOle10(Stream stream, string outputFolder)
{
var ole10 = new Ole10(stream);
if (ole10.Format != OleFormat.File) return null;
switch (ole10.ClassName)
{
case "Package":
var package = new Package(ole10.NativeData);
if (package.Format == OleFormat.Link) return null;
var fileName = Path.GetFileName(package.FileName);
if (string.IsNullOrWhiteSpace(fileName))
fileName = Extraction.DefaultEmbeddedObjectName;
fileName = Path.Combine(outputFolder, fileName);
return Extraction.SaveByteArrayToFile(package.Data, fileName);
default:
if (Extraction.IsCompoundFile(ole10.NativeData))
return Extraction.SaveFromStorageNode(ole10.NativeData, outputFolder, ole10.ItemName);
throw new OEObjectTypeNotSupported("Unsupported OleNative ClassName '" +
ole10.ClassName + "' found");
}
}
/// <summary>
/// Creates this object and sets all its properties
/// </summary>
/// <param name="storage">The OLE version 2.0 object as a <see cref="CFStorage" /></param>
internal Ole10Native(CFStorage storage)
{
if (storage == null)
throw new ArgumentNullException("storage");
var ole10Native = storage.GetStream("\x0001Ole10Native");
var compObj = storage.GetStream("\x0001CompObj");
var compObjStream = new CompObjStream(compObj);
AnsiUserType = compObjStream.AnsiUserType;
StringFormat = compObjStream.StringFormat;
ClipboardFormat = compObjStream.ClipboardFormat;
switch (compObjStream.AnsiUserType)
{
case "OLE Package":
var ole10NativeSize = (int) ole10Native.Size - 4;
var data = ole10Native.GetData(4, ref ole10NativeSize);
var package = new Package(data);
Format = package.Format;
FileName = Path.GetFileName(package.FileName);
FilePath = package.FilePath;
NativeData = package.Data;
break;
case "PBrush":
case "Pakket":
// Ignore
break;
default:
throw new OEObjectTypeNotSupported("Unsupported OleNative AnsiUserType '" +
compObjStream.AnsiUserType + "' found");
}
}
