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Implement undo for context and geometry operators. See #1475.

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This commit is contained in:
Dion Moult
2021-07-04 19:45:34 +10:00
parent 8a917dc050
commit b8015644e9
4 changed files with 41 additions and 22 deletions
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src/ifcopenshell-python/ifcopenshell/file.py
+10 -14
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@@ -71,15 +71,19 @@ class Transaction:
for inverse in self.file.get_inverse(element):
inverse_references = []
for i, attribute in enumerate(inverse):
if attribute == element:
inverse_references.append((i, "single"))
elif isinstance(attribute, tuple) and element in attribute:
inverse_references.append((i, "multiple"))
if self.has_element_reference(attribute, element):
inverse_references.append((i, self.serialise_value(inverse, attribute)))
inverses[inverse.id()] = inverse_references
self.operations.append(
{"action": "delete", "inverses": inverses, "value": self.serialise_entity_instance(element)}
)
def has_element_reference(self, value, element):
if isinstance(value, (tuple, list)):
for v in value:
return self.has_element_reference(v, element)
return value == element
def rollback(self):
for operation in self.operations[::-1]:
if operation["action"] == "create":
@@ -105,16 +109,8 @@ class Transaction:
pass
for inverse_id, data in operation["inverses"].items():
inverse = self.file.by_id(inverse_id)
for index, data_type in data:
if data_type == "single":
inverse[index] = e
elif data_type == "multiple":
if inverse[index] is None:
inverse[index] = e
else:
new = list(inverse[index])
new.append(e)
inverse[index] = new
for index, value in data:
inverse[index] = self.unserialise_value(inverse, value)
def commit(self):
for operation in self.operations: