/// <summary>
/// Find all live PersistDirectoryAtoms by traversing all UserEditAtoms starting from CurrentUserAtom.
/// </summary>
/// <returns>List of PersistDirectoryAtoms. The oldest PersitDirectoryAtom will be the first element of the list.</returns>
private List <PersistDirectoryAtom> FindLivePersistDirectoryAtoms()
{
List <PersistDirectoryAtom> result = new List <PersistDirectoryAtom>();
UserEditAtom userEditAtom = this.LastUserEdit;
while (userEditAtom != null)
{
this.PowerpointDocumentStream.Seek(userEditAtom.OffsetPersistDirectory, SeekOrigin.Begin);
PersistDirectoryAtom pdAtom = (PersistDirectoryAtom)Record.ReadRecord(this.PowerpointDocumentStream);
result.Insert(0, pdAtom);
this.PowerpointDocumentStream.Seek(userEditAtom.OffsetLastEdit, SeekOrigin.Begin);
if (userEditAtom.OffsetLastEdit != 0)
{
userEditAtom = (UserEditAtom)Record.ReadRecord(this.PowerpointDocumentStream);
}
else
{
userEditAtom = null;
}
}
return(result);
}
public PowerpointDocument(StructuredStorageReader file)
{
try
{
this.CurrentUserStream = file.GetStream("Current User");
Record rec = Record.ReadRecord(this.CurrentUserStream);
if (rec is CurrentUserAtom)
{
this.CurrentUserAtom = (CurrentUserAtom)rec;
}
else
{
this.CurrentUserStream.Position = 0;
byte[] bytes = new byte[this.CurrentUserStream.Length];
this.CurrentUserStream.Read(bytes);
string s = Encoding.UTF8.GetString(bytes).Replace("\0", "");
}
}
catch (InvalidRecordException e)
{
throw new InvalidStreamException("Current user stream is not valid", e);
}
// Optional 'Pictures' stream
if (file.FullNameOfAllStreamEntries.Contains("\\Pictures"))
{
try
{
this.PicturesStream = file.GetStream("Pictures");
this.PicturesContainer = new Pictures(new BinaryReader(this.PicturesStream), (uint)this.PicturesStream.Length, 0, 0, 0);
}
catch (InvalidRecordException e)
{
throw new InvalidStreamException("Pictures stream is not valid", e);
}
}
this.PowerpointDocumentStream = file.GetStream("PowerPoint Document");
try
{
this.DocumentSummaryInformationStream = file.GetStream("DocumentSummaryInformation");
ScanDocumentSummaryInformation();
}
catch (StructuredStorage.Common.StreamNotFoundException e)
{
//ignore
}
if (this.CurrentUserAtom != null)
{
this.PowerpointDocumentStream.Seek(this.CurrentUserAtom.OffsetToCurrentEdit, SeekOrigin.Begin);
this.LastUserEdit = (UserEditAtom)Record.ReadRecord(this.PowerpointDocumentStream);
}
this.ConstructPersistObjectDirectory();
this.IdentifyDocumentPersistObject();
this.IdentifyMasterPersistObjects();
this.IdentifySlidePersistObjects();
this.IdentifyOlePersistObjects();
this.IdentifyVbaProjectObject();
}
