Old annotation systems now creates IFC elements again. Also text and misc annotations now work again with new system. See #1153.

src/ifcopenshell-python/ifcopenshell/util/representation.py

@@ -0,0 +1,42 @@
+def get_context(ifc_file, context, subcontext=None, target_view=None):
+    if subcontext or target_view:
+        elements = ifc_file.by_type("IfcGeometricRepresentationSubContext")
+    else:
+        elements = ifc_file.by_type("IfcGeometricRepresentationContext", include_subtypes=False)
+    for element in elements:
+        if context and element.ContextType != context:
+            continue
+        if subcontext and getattr(element, "ContextIdentifier") != subcontext:
+            continue
+        if target_view and getattr(element, "TargetView") != target_view:
+            continue
+        return element
+
+
+def is_representation_of_context(representation, context, subcontext=None, target_view=None):
+    if target_view is not None:
+        return (
+            representation.ContextOfItems.is_a("IfcGeometricRepresentationSubContext")
+            and representation.ContextOfItems.TargetView == target_view
+            and representation.ContextOfItems.ContextIdentifier == subcontext
+            and representation.ContextOfItems.ContextType == context
+        )
+    elif subcontext is not None:
+        return (
+            representation.ContextOfItems.is_a("IfcGeometricRepresentationSubContext")
+            and representation.ContextOfItems.ContextIdentifier == subcontext
+            and representation.ContextOfItems.ContextType == context
+        )
+    elif representation.ContextOfItems.ContextType == context:
+        return True
+
+
+def get_representation(element, context, subcontext=None, target_view=None):
+    if element.is_a("IfcProduct") and element.Representation:
+        for r in element.Representation.Representations:
+            if is_representation_of_context(r, context, subcontext, target_view):
+                return r
+    elif element.is_a("IfcTypeProduct") and element.RepresentationMaps:
+        for r in element.RepresentationMaps:
+            if is_representation_of_context(r.MappedRepresentation, context, subcontext, target_view):
+                return r.MappedRepresentation