Fix unintuitive UI where objects had to be visible for the operation to run.

src/blenderbim/blenderbim/bim/module/attribute/operator.py

@@ -117,5 +117,5 @@ class CopyAttributeToSelection(bpy.types.Operator, Operator):
 
     def _execute(self, context):
         value = context.active_object.BIMAttributeProperties.attributes.get(self.name).get_value()
-        for obj in context.selected_objects:
+        for obj in tool.Blender.get_selected_objects():
             core.copy_attribute_to_selection(tool.Ifc, name=self.name, value=value, obj=obj)

src/blenderbim/blenderbim/bim/module/document/operator.py

@@ -128,7 +128,7 @@ class AssignDocument(bpy.types.Operator, tool.Ifc.Operator):
 
     def _execute(self, context):
         document = tool.Ifc.get().by_id(self.document)
-        objs = [bpy.data.objects.get(self.obj)] if self.obj else context.selected_objects
+        objs = [bpy.data.objects.get(self.obj)] if self.obj else tool.Blender.get_selected_objects()
         for obj in objs:
             element = tool.Ifc.get_entity(obj)
             if element:
@@ -144,7 +144,7 @@ class UnassignDocument(bpy.types.Operator, tool.Ifc.Operator):
 
     def _execute(self, context):
         document = tool.Ifc.get().by_id(self.document)
-        objs = [bpy.data.objects.get(self.obj)] if self.obj else context.selected_objects
+        objs = [bpy.data.objects.get(self.obj)] if self.obj else tool.Blender.get_selected_objects()
         for obj in objs:
             element = tool.Ifc.get_entity(obj)
             if element:

src/blenderbim/blenderbim/bim/module/material/operator.py

@@ -142,7 +142,7 @@ class AssignMaterial(bpy.types.Operator, tool.Ifc.Operator):
     material_type: bpy.props.StringProperty()
 
     def _execute(self, context):
-        objects = [bpy.data.objects.get(self.obj)] if self.obj else context.selected_objects
+        objects = [bpy.data.objects.get(self.obj)] if self.obj else tool.Blender.get_selected_objects()
         active_obj = context.active_object
         active_object_material_type = self.material_type or active_obj.BIMObjectMaterialProperties.material_type
         material = tool.Ifc.get().by_id(int(active_obj.BIMObjectMaterialProperties.material))
@@ -205,7 +205,7 @@ class UnassignMaterial(bpy.types.Operator, tool.Ifc.Operator):
     obj: bpy.props.StringProperty()
 
     def _execute(self, context):
-        objects = [bpy.data.objects.get(self.obj)] if self.obj else context.selected_objects
+        objects = [bpy.data.objects.get(self.obj)] if self.obj else tool.Blender.get_selected_objects()
         for obj in objects:
             element = tool.Ifc.get_entity(obj)
             if element:
@@ -472,7 +472,7 @@ class EditAssignedMaterial(bpy.types.Operator, tool.Ifc.Operator):
         element = tool.Ifc.get_entity(active_obj)
         material = ifcopenshell.util.element.get_material(element)
 
-        objects = context.selected_objects
+        objects = tool.Blender.get_selected_objects()
 
         if props.active_material_set_item_id != 0:  # We were editing a material layer set item
             bpy.ops.bim.edit_material_set_item(material_set_item=props.active_material_set_item_id)
@@ -668,7 +668,7 @@ class CopyMaterial(bpy.types.Operator, tool.Ifc.Operator):
         material = ifcopenshell.util.element.get_material(
             self.file.by_id(context.active_object.BIMObjectProperties.ifc_definition_id)
         )
-        for obj in context.selected_objects:
+        for obj in tool.Blender.get_selected_objects():
             if obj == context.active_object:
                 continue
             if not obj.BIMObjectProperties.ifc_definition_id:

src/blenderbim/blenderbim/bim/module/pset/operator.py

@@ -289,7 +289,7 @@ class RemovePset(bpy.types.Operator, Operator):
     def _execute(self, context):
         if self.obj_type == "Object":
             if context.selected_objects:
-                objects = [o.name for o in context.selected_objects]
+                objects = [o.name for o in tool.Blender.get_selected_objects()]
             else:
                 objects = [context.active_object.name]
         else:
@@ -318,7 +318,7 @@ class AddPset(bpy.types.Operator, Operator):
         pset_name = get_pset_props(context, self.obj, self.obj_type).pset_name
         if self.obj_type == "Object":
             if context.selected_objects:
-                objects = [o.name for o in context.selected_objects]
+                objects = [o.name for o in tool.Blender.get_selected_objects()]
             else:
                 objects = [context.active_object.name]
         else:
@@ -446,7 +446,7 @@ class CopyPropertyToSelection(bpy.types.Operator, Operator):
         is_pset = tool.Ifc.get().by_id(context.active_object.PsetProperties.active_pset_id).is_a("IfcPropertySet")
         pset_name = context.active_object.PsetProperties.active_pset_name
         prop_value = context.active_object.PsetProperties.properties.get(self.name).metadata.get_value()
-        for obj in context.selected_objects:
+        for obj in tool.Blender.get_selected_objects():
             core.copy_property_to_selection(
                 tool.Ifc,
                 tool.Pset,
@@ -548,10 +548,9 @@ class BIM_OT_add_edit_custom_property(bpy.types.Operator):
 
     def _execute(self, context):
         self.file = IfcStore.get_file()
-        selected_objects = context.selected_objects
         props = context.scene.AddEditProperties
 
-        for obj in selected_objects:
+        for obj in tool.Blender.get_selected_objects():
             ifc_definition_id = obj.BIMObjectProperties.ifc_definition_id
             if not ifc_definition_id:
                 continue
@@ -607,10 +606,9 @@ class BIM_OT_bulk_remove_psets(bpy.types.Operator):
 
     def _execute(self, context):
         self.file = IfcStore.get_file()
-        selected_objects = context.selected_objects
         props = context.scene.DeletePsets
 
-        for obj in selected_objects:
+        for obj in tool.Blender.get_selected_objects():
             ifc_definition_id = obj.BIMObjectProperties.ifc_definition_id
             if not ifc_definition_id:
                 continue

src/blenderbim/blenderbim/tool/blender.py

@@ -37,6 +37,10 @@ class Blender:
             i += 1
         return f"{name} {i}"
 
+    @classmethod
+    def get_selected_objects(cls):
+         return set(bpy.context.selected_objects + [bpy.context.active_object])
+
     @classmethod
     def create_ifc_object(cls, ifc_class: str, name: str = None, data=None) -> bpy.types.Object:
         name = name or "My " + ifc_class