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Fix bug where when deleting representations it could sometimes overreach and delete geometric, style, or layer data of other elements. See #1812.

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This commit is contained in:
Dion Moult
2021-10-20 14:11:49 +11:00
parent 52062bc7e8
commit 58859ef8c3
3 changed files with 99 additions and 29 deletions
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src/ifcopenshell-python/ifcopenshell/api/geometry/remove_representation.py
+18 -28
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@@ -9,35 +9,25 @@ class Usecase:
self.settings[key] = value
def execute(self):
if self.settings["representation"].RepresentationType == "MappedRepresentation":
return self.remove_mapped_representation_portion_only()
return self.remove_entire_representation_tree()
def remove_mapped_representation_portion_only(self):
for item in self.settings["representation"].Items:
if len(self.file.get_inverse(item.MappingTarget)) == 1:
ifcopenshell.util.element.remove_deep(self.file, item.MappingTarget)
self.file.remove(item.MappingTarget)
self.file.remove(item)
self.file.remove(self.settings["representation"])
def remove_entire_representation_tree(self):
dummy_context = self.file.create_entity("IfcRepresentationContext")
styled_items = set()
presentation_layer_assignments = set()
for subelement in self.file.traverse(self.settings["representation"]):
if subelement.is_a("IfcRepresentationItem") and subelement.StyledByItem:
[self.file.remove(s) for s in subelement.StyledByItem]
[styled_items.add(s) for s in subelement.StyledByItem]
elif subelement.is_a("IfcRepresentation"):
subelement.ContextOfItems = dummy_context
self.purge_representation_inverses(subelement)
self.purge_representation_inverses(self.settings["representation"])
ifcopenshell.util.element.remove_deep(self.file, self.settings["representation"])
for inverse in self.file.get_inverse(subelement):
if inverse.is_a("IfcPresentationLayerAssignment"):
presentation_layer_assignments.add(inverse)
def purge_representation_inverses(self, element):
for inverse in self.file.get_inverse(element):
if inverse.is_a("IfcPresentationLayerAssignment"):
assigned_items = set(inverse.AssignedItems)
if len(assigned_items) == 1:
self.file.remove(inverse)
else:
assigned_items.remove(element)
inverse.AssignedItems = list(assigned_items)
ifcopenshell.util.element.remove_deep2(
self.file,
self.settings["representation"],
extra_subgraph_elements=list(styled_items | presentation_layer_assignments),
)
for element in styled_items:
if not element.Item:
self.file.remove(element)
for element in presentation_layer_assignments:
if len(element.AssignedItems) == 0:
self.file.remove(element)