WIP merge MVDs into geometry workarounds UI. Cleaner, more usable import / export UI. Remove obsoleted MVD options. See #1222.

src/ifcblenderexport/blenderbim/bim/module/geometry/remove_representation.py

@@ -1,3 +1,5 @@
+import ifcopenshell.util.element
+
 class Usecase:
     def __init__(self, file, settings=None):
         self.file = file
@@ -6,17 +8,10 @@ class Usecase:
             self.settings[key] = value
 
     def execute(self):
-        styles = []
+        dummy_context = self.file.create_entity("IfcRepresentationContext")
         for subelement in self.file.traverse(self.settings["representation"]):
             if subelement.is_a("IfcRepresentationItem") and subelement.StyledByItem:
-                styles.append(subelement)
-        for style in styles:
-            self.remove_deep(style)
-        self.remove_deep(self.settings["representation"])
-
-    def remove_deep(self, element):
-        subgraph = list(self.file.traverse(element))
-        subgraph_set = set(subgraph)
-        for ref in subgraph[::-1]:
-            if ref.id() and len(set(self.file.get_inverse(ref)) - subgraph_set) == 0:
-                self.file.remove(ref)
+                [self.file.remove(s) for s in subelement.StyledByItem]
+            elif subelement.is_a("IfcRepresentation"):
+                subelement.ContextOfItems = dummy_context
+        ifcopenshell.util.element.remove_deep(self.file, self.settings["representation"])