void AGroupActor::PostRemove()
{
// If all children have been removed (or only one subgroup remains), this group is no longer active.
if( GroupActors.Num() == 0 && SubGroups.Num() <= 1 )
{
// Remove any potentially remaining subgroups
SubGroups.Empty();
// Destroy the actor and remove it from active groups
AGroupActor* ParentGroup = AGroupActor::GetParentForActor(this);
if(ParentGroup)
{
ParentGroup->Modify();
ParentGroup->Remove(*this);
}
UWorld* MyWorld = GetWorld();
if( MyWorld )
{
// Group is no longer active
MyWorld->ActiveGroupActors.Remove(this);
MyWorld->ModifyLevel(GetLevel());
// Mark the group actor for removal
MarkPackageDirty();
// If not currently garbage collecting (changing maps, saving, etc), remove the group immediately
if(!GIsGarbageCollecting)
{
// Refresh all editor browsers after removal
FScopedRefreshAllBrowsers LevelRefreshAllBrowsers;
// Destroy group and clear references.
GEditor->Layers->DisassociateActorFromLayers( this );
MyWorld->EditorDestroyActor( this, false );
LevelRefreshAllBrowsers.Request();
}
}
}
}
bool EditorDestroyLevel( ULevel* InLevel )
{
check(InLevel);
check(!InLevel->IsPersistentLevel());
InLevel->ReleaseRenderingResources();
GStreamingManager->RemoveLevel( InLevel );
UWorld* World = InLevel->OwningWorld;
World->RemoveLevel(InLevel);
InLevel->ClearLevelComponents();
int32 NumFailedDestroyedAttempts = 0;
bool bDestroyedActor = false;
for(int32 ActorIndex = 0; ActorIndex < InLevel->Actors.Num(); ++ActorIndex)
{
AActor* ActorToRemove = InLevel->Actors[ActorIndex];
if (ActorToRemove)
{
bDestroyedActor = World->EditorDestroyActor(ActorToRemove, false);
// Keep track of how many actors were not destroyed because all actors need to be destroyed
if(!bDestroyedActor)
{
NumFailedDestroyedAttempts++;
}
}
}
if(NumFailedDestroyedAttempts > 0)
{
UE_LOG(LogLevelTools, Log, TEXT("Failed to destroy %d actors after attempting to destroy level!"), NumFailedDestroyedAttempts);
}
InLevel->MarkPendingKill();
InLevel->GetOuter()->ClearFlags(RF_Public|RF_Standalone);
World->MarkPackageDirty();
World->BroadcastLevelsChanged();
return true;
}
void FBlueprintCompileReinstancer::ReplaceInstancesOfClass(UClass* OldClass, UClass* NewClass, UObject* OriginalCDO, TSet<UObject*>* ObjectsThatShouldUseOldStuff)
{
USelection* SelectedActors;
bool bSelectionChanged = false;
TArray<UObject*> ObjectsToReplace;
const bool bLogConversions = false; // for debugging
// Map of old objects to new objects
TMap<UObject*, UObject*> OldToNewInstanceMap;
TMap<UClass*, UClass*> OldToNewClassMap;
OldToNewClassMap.Add(OldClass, NewClass);
TMap<FStringAssetReference, UObject*> ReinstancedObjectsWeakReferenceMap;
// actors being replace
TArray<FActorReplacementHelper> ReplacementActors;
// A list of objects (e.g. Blueprints) that potentially have editors open that we need to refresh
TArray<UObject*> PotentialEditorsForRefreshing;
// A list of component owners that need their construction scripts re-ran (because a component of theirs has been reinstanced)
TSet<AActor*> OwnersToReconstruct;
// Set global flag to let system know we are reconstructing blueprint instances
TGuardValue<bool> GuardTemplateNameFlag(GIsReconstructingBlueprintInstances, true);
struct FObjectRemappingHelper
{
void OnObjectsReplaced(const TMap<UObject*, UObject*>& InReplacedObjects)
{
ReplacedObjects.Append(InReplacedObjects);
}
TMap<UObject*, UObject*> ReplacedObjects;
} ObjectRemappingHelper;
FDelegateHandle OnObjectsReplacedHandle = GEditor->OnObjectsReplaced().AddRaw(&ObjectRemappingHelper,&FObjectRemappingHelper::OnObjectsReplaced);
{ BP_SCOPED_COMPILER_EVENT_STAT(EKismetReinstancerStats_ReplaceInstancesOfClass);
const bool bIncludeDerivedClasses = false;
GetObjectsOfClass(OldClass, ObjectsToReplace, bIncludeDerivedClasses);
SelectedActors = GEditor->GetSelectedActors();
SelectedActors->BeginBatchSelectOperation();
SelectedActors->Modify();
// Then fix 'real' (non archetype) instances of the class
for (UObject* OldObject : ObjectsToReplace)
{
// Skip non-archetype instances, EXCEPT for component templates
const bool bIsComponent = NewClass->IsChildOf(UActorComponent::StaticClass());
if ((!bIsComponent && OldObject->IsTemplate()) || OldObject->IsPendingKill())
{
continue;
}
UBlueprint* CorrespondingBlueprint = Cast<UBlueprint>(OldObject->GetClass()->ClassGeneratedBy);
UObject* OldBlueprintDebugObject = nullptr;
// If this object is being debugged, cache it off so we can preserve the 'object being debugged' association
if ((CorrespondingBlueprint != nullptr) && (CorrespondingBlueprint->GetObjectBeingDebugged() == OldObject))
{
OldBlueprintDebugObject = OldObject;
}
AActor* OldActor = Cast<AActor>(OldObject);
UObject* NewUObject = nullptr;
// if the object to replace is an actor...
if (OldActor != nullptr)
{
FVector Location = FVector::ZeroVector;
FRotator Rotation = FRotator::ZeroRotator;
if (USceneComponent* OldRootComponent = OldActor->GetRootComponent())
{
Location = OldActor->GetActorLocation();
Rotation = OldActor->GetActorRotation();
}
// If this actor was spawned from an Archetype, we spawn the new actor from the new version of that archetype
UObject* OldArchetype = OldActor->GetArchetype();
UWorld* World = OldActor->GetWorld();
AActor* NewArchetype = Cast<AActor>(OldToNewInstanceMap.FindRef(OldArchetype));
// Check that either this was an instance of the class directly, or we found a new archetype for it
check(OldArchetype == OldClass->GetDefaultObject() || NewArchetype);
// Spawn the new actor instance, in the same level as the original, but deferring running the construction script until we have transferred modified properties
ULevel* ActorLevel = OldActor->GetLevel();
UClass** MappedClass = OldToNewClassMap.Find(OldActor->GetClass());
UClass* SpawnClass = MappedClass ? *MappedClass : NewClass;
FActorSpawnParameters SpawnInfo;
SpawnInfo.OverrideLevel = ActorLevel;
SpawnInfo.Template = NewArchetype;
SpawnInfo.bNoCollisionFail = true;
SpawnInfo.bDeferConstruction = true;
// Temporarily remove the deprecated flag so we can respawn the Blueprint in the level
const bool bIsClassDeprecated = SpawnClass->HasAnyClassFlags(CLASS_Deprecated);
SpawnClass->ClassFlags &= ~CLASS_Deprecated;
AActor* NewActor = World->SpawnActor(SpawnClass, &Location, &Rotation, SpawnInfo);
// Reassign the deprecated flag if it was previously assigned
if (bIsClassDeprecated)
{
SpawnClass->ClassFlags |= CLASS_Deprecated;
}
check(NewActor != nullptr);
NewUObject = NewActor;
// store the new actor for the second pass (NOTE: this detaches
// OldActor from all child/parent attachments)
//
// running the NewActor's construction-script is saved for that
// second pass (because the construction-script may reference
// another instance that hasn't been replaced yet).
ReplacementActors.Add(FActorReplacementHelper(NewActor, OldActor));
ReinstancedObjectsWeakReferenceMap.Add(OldObject, NewUObject);
OldActor->DestroyConstructedComponents(); // don't want to serialize components from the old actor
// Unregister native components so we don't copy any sub-components they generate for themselves (like UCameraComponent does)
OldActor->UnregisterAllComponents();
// Unregister any native components, might have cached state based on properties we are going to overwrite
NewActor->UnregisterAllComponents();
UEditorEngine::CopyPropertiesForUnrelatedObjects(OldActor, NewActor);
// reset properties/streams
NewActor->ResetPropertiesForConstruction();
// register native components
NewActor->RegisterAllComponents();
//
// clean up the old actor (unselect it, remove it from the world, etc.)...
if (OldActor->IsSelected())
{
GEditor->SelectActor(OldActor, /*bInSelected =*/false, /*bNotify =*/false);
bSelectionChanged = true;
}
if (GEditor->Layers.IsValid()) // ensure(NULL != GEditor->Layers) ?? While cooking the Layers is NULL.
{
GEditor->Layers->DisassociateActorFromLayers(OldActor);
}
World->EditorDestroyActor(OldActor, /*bShouldModifyLevel =*/true);
OldToNewInstanceMap.Add(OldActor, NewActor);
}
else
{
FName OldName(OldObject->GetFName());
OldObject->Rename(NULL, OldObject->GetOuter(), REN_DoNotDirty | REN_DontCreateRedirectors);
NewUObject = NewObject<UObject>(OldObject->GetOuter(), NewClass, OldName);
check(NewUObject != nullptr);
UEditorEngine::CopyPropertiesForUnrelatedObjects(OldObject, NewUObject);
if (UAnimInstance* AnimTree = Cast<UAnimInstance>(NewUObject))
{
// Initialising the anim instance isn't enough to correctly set up the skeletal mesh again in a
// paused world, need to initialise the skeletal mesh component that contains the anim instance.
if (USkeletalMeshComponent* SkelComponent = Cast<USkeletalMeshComponent>(AnimTree->GetOuter()))
{
SkelComponent->InitAnim(true);
}
}
OldObject->RemoveFromRoot();
OldObject->MarkPendingKill();
OldToNewInstanceMap.Add(OldObject, NewUObject);
if (bIsComponent)
{
UActorComponent* Component = Cast<UActorComponent>(NewUObject);
AActor* OwningActor = Component->GetOwner();
if (OwningActor)
{
OwningActor->ResetOwnedComponents();
// Check to see if they have an editor that potentially needs to be refreshed
if (OwningActor->GetClass()->ClassGeneratedBy)
{
PotentialEditorsForRefreshing.AddUnique(OwningActor->GetClass()->ClassGeneratedBy);
}
// we need to keep track of actor instances that need
// their construction scripts re-ran (since we've just
// replaced a component they own)
OwnersToReconstruct.Add(OwningActor);
}
}
}
// If this original object came from a blueprint and it was in the selected debug set, change the debugging to the new object.
if ((CorrespondingBlueprint) && (OldBlueprintDebugObject) && (NewUObject))
{
CorrespondingBlueprint->SetObjectBeingDebugged(NewUObject);
}
if (bLogConversions)
{
UE_LOG(LogBlueprint, Log, TEXT("Converted instance '%s' to '%s'"), *OldObject->GetPathName(), *NewUObject->GetPathName());
}
}
}
GEditor->OnObjectsReplaced().Remove(OnObjectsReplacedHandle);
// Now replace any pointers to the old archetypes/instances with pointers to the new one
TArray<UObject*> SourceObjects;
TArray<UObject*> DstObjects;
OldToNewInstanceMap.GenerateKeyArray(SourceObjects);
OldToNewInstanceMap.GenerateValueArray(DstObjects); // Also look for references in new spawned objects.
SourceObjects.Append(DstObjects);
FReplaceReferenceHelper::IncludeCDO(OldClass, NewClass, OldToNewInstanceMap, SourceObjects, OriginalCDO);
FReplaceReferenceHelper::FindAndReplaceReferences(SourceObjects, ObjectsThatShouldUseOldStuff, ObjectsToReplace, OldToNewInstanceMap, ReinstancedObjectsWeakReferenceMap);
{ BP_SCOPED_COMPILER_EVENT_STAT(EKismetReinstancerStats_ReplacementConstruction);
// the process of setting up new replacement actors is split into two
// steps (this here, is the second)...
//
// the "finalization" here runs the replacement actor's construction-
// script and is left until late to account for a scenario where the
// construction-script attempts to modify another instance of the
// same class... if this were to happen above, in the ObjectsToReplace
// loop, then accessing that other instance would cause an assert in
// UProperty::ContainerPtrToValuePtrInternal() (which appropriatly
// complains that the other instance's type doesn't match because it
// hasn't been replaced yet... that's why we wait until after
// FArchiveReplaceObjectRef to run construction-scripts).
for (FActorReplacementHelper& ReplacementActor : ReplacementActors)
{
ReplacementActor.Finalize(ObjectRemappingHelper.ReplacedObjects);
}
}
SelectedActors->EndBatchSelectOperation();
if (bSelectionChanged)
{
GEditor->NoteSelectionChange();
}
if (GEditor)
{
// Refresh any editors for objects that we've updated components for
for (auto BlueprintAsset : PotentialEditorsForRefreshing)
{
FBlueprintEditor* BlueprintEditor = static_cast<FBlueprintEditor*>(FAssetEditorManager::Get().FindEditorForAsset(BlueprintAsset, /*bFocusIfOpen =*/false));
if (BlueprintEditor)
{
BlueprintEditor->RefreshEditors();
}
}
}
// in the case where we're replacing component instances, we need to make
// sure to re-run their owner's construction scripts
for (AActor* ActorInstance : OwnersToReconstruct)
{
ActorInstance->RerunConstructionScripts();
}
}
