Unique identifiers for opened documents

Question

Hello,
I am trying to find the equivalent of the Flex "Document.id" in the C++ SDK.
It seems to me that the UID of a document is always equal to 1 :
InterfacePtr<IApplication> application(GetExecutionContextSession()->QueryApplication());
InterfacePtr<IDocumentList> docList(application->QueryDocumentList());
PMString name;
for (int i=0; i < docList->GetDocCount(); i++)
     IDocument* doc = docList->GetNthDoc(i);
     if(nil == doc)
          continue;
     UIDRef myUIDRef = GetUIDRef(doc);
     UID myUID = myUIDRef.GetDataBase()->GetRootUID();//or myUIDRef.GetUID()
     doc->GetName(name);
     printf("%dth doc : %d (%s)", i, myUID.Get(), name.GetPlatformString().c_str());
In Flex, it is incremental.
Thank you,
David

Answer 1

UIDs are unique only within their database.
You could take the database pointer as unique value, but after close and open another document may receive the same memory location for its database. Another approach is a guid stored within the document meta data, but I don't know how InDesign will deal with duplicated files in this regard. The best would be you internally track open / close document signals and create your own completely unique IDs (with a mapping to the database pointer).
For either kind of unique value, you'd have to implement your own scripting property to hopefully expose it to Flex - assuming you go through CSXS.
Dirk