src/Pure/PIDE/document_editor.scala

--- a/src/Pure/PIDE/document_editor.scala	Tue Dec 20 13:59:07 2022 +0100
+++ b/src/Pure/PIDE/document_editor.scala	Tue Dec 20 16:34:13 2022 +0100
@@ -63,6 +63,9 @@
         case None => Nil
       }
 
+    def active_document_theories: List[Document.Node.Name] =
+      if (is_active) all_document_theories else Nil
+
     def select(
       names: Iterable[Document.Node.Name],
       set: Boolean = false,