Really barebones UI to list space boundaries.

src/ifcopenshell-python/ifcopenshell/api/boundary/data.py

@@ -0,0 +1,33 @@
+class Data:
+    is_loaded = False
+    boundaries = {}
+    spaces = {}
+
+    @classmethod
+    def purge(cls):
+        cls.is_loaded = False
+        cls.boundaries = {}
+        cls.spaces = {}
+
+    @classmethod
+    def load(cls, file):
+        cls._file = file
+        for boundary in cls._file.by_type("IfcRelSpaceBoundary"):
+            data = boundary.get_info()
+            data["RelatingSpace"] = data["RelatingSpace"].id() if data["RelatingSpace"] else None
+            data["RelatedBuildingElement"] = (
+                data["RelatedBuildingElement"].id() if data["RelatedBuildingElement"] else None
+            )
+            del data["ConnectionGeometry"]
+            if cls._file.schema == "IFC2X3":
+                pass
+            else:
+                if boundary.is_a("IfcRelSpaceBoundary1stLevel"):
+                    data["ParentBoundary"] = data["ParentBoundary"].id() if data["ParentBoundary"] else None
+                if boundary.is_a("IfcRelSpaceBoundary2ndLevel"):
+                    data["CorrespondingBoundary"] = (
+                        data["CorrespondingBoundary"].id() if data["CorrespondingBoundary"] else None
+                    )
+            cls.boundaries[boundary.id()] = data
+            cls.spaces.setdefault(data["RelatingSpace"], []).append(boundary.id())
+        cls.is_loaded = True