UActorComponent* AActor::AddComponent(FName TemplateName, bool bManualAttachment, const FTransform& RelativeTransform, const UObject* ComponentTemplateContext)
{
UActorComponent* Template = nullptr;
UBlueprintGeneratedClass* BlueprintGeneratedClass = Cast<UBlueprintGeneratedClass>((ComponentTemplateContext != nullptr) ? ComponentTemplateContext->GetClass() : GetClass());
while(BlueprintGeneratedClass != nullptr)
{
Template = BlueprintGeneratedClass->FindComponentTemplateByName(TemplateName);
if(nullptr != Template)
{
break;
}
BlueprintGeneratedClass = Cast<UBlueprintGeneratedClass>(BlueprintGeneratedClass->GetSuperClass());
}
bool bIsSceneComponent = false;
UActorComponent* NewActorComp = CreateComponentFromTemplate(Template);
if(NewActorComp != nullptr)
{
// Call function to notify component it has been created
NewActorComp->OnComponentCreated();
// The user has the option of doing attachment manually where they have complete control or via the automatic rule
// that the first component added becomes the root component, with subsequent components attached to the root.
USceneComponent* NewSceneComp = Cast<USceneComponent>(NewActorComp);
if(NewSceneComp != nullptr)
{
if (!bManualAttachment)
{
if (RootComponent == nullptr)
{
RootComponent = NewSceneComp;
}
else
{
NewSceneComp->AttachTo(RootComponent);
}
}
NewSceneComp->SetRelativeTransform(RelativeTransform);
bIsSceneComponent = true;
}
// Register component, which will create physics/rendering state, now component is in correct position
NewActorComp->RegisterComponent();
UWorld* World = GetWorld();
if (!bRunningUserConstructionScript && World && bIsSceneComponent)
{
UPrimitiveComponent* NewPrimitiveComponent = Cast<UPrimitiveComponent>(NewActorComp);
if (NewPrimitiveComponent && ACullDistanceVolume::CanBeAffectedByVolumes(NewPrimitiveComponent))
{
World->UpdateCullDistanceVolumes(this, NewPrimitiveComponent);
}
}
}
return NewActorComp;
}
void UActorComponent::PostLoad()
{
Super::PostLoad();
if (GetLinkerUE4Version() < VER_UE4_ACTOR_COMPONENT_CREATION_METHOD)
{
if (IsTemplate())
{
CreationMethod = EComponentCreationMethod::Native;
}
else if (bCreatedByConstructionScript_DEPRECATED)
{
CreationMethod = EComponentCreationMethod::SimpleConstructionScript;
}
else if (bInstanceComponent_DEPRECATED)
{
CreationMethod = EComponentCreationMethod::Instance;
}
if (CreationMethod == EComponentCreationMethod::SimpleConstructionScript)
{
UBlueprintGeneratedClass* Class = CastChecked<UBlueprintGeneratedClass>(GetOuter()->GetClass());
while (Class)
{
USimpleConstructionScript* SCS = Class->SimpleConstructionScript;
if (SCS != nullptr && SCS->FindSCSNode(GetFName()))
{
break;
}
else
{
Class = Cast<UBlueprintGeneratedClass>(Class->GetSuperClass());
if (Class == nullptr)
{
CreationMethod = EComponentCreationMethod::UserConstructionScript;
}
}
}
}
}
if (CreationMethod == EComponentCreationMethod::SimpleConstructionScript)
{
if ((GetLinkerUE4Version() < VER_UE4_TRACK_UCS_MODIFIED_PROPERTIES) && !HasAnyFlags(RF_ClassDefaultObject))
{
DetermineUCSModifiedProperties();
}
}
else
{
// For a brief period of time we were inadvertently storing these for all components, need to clear it out
UCSModifiedProperties.Empty();
}
}
FFindHeadersToInclude(FGatherConvertedClassDependencies& InDependencies)
: FGatherConvertedClassDependenciesHelperBase(InDependencies)
{
FindReferences(Dependencies.GetActualStruct());
// special case - literal enum
UBlueprintGeneratedClass* BPGC = Cast<UBlueprintGeneratedClass>(Dependencies.GetActualStruct());
UBlueprint* BP = BPGC ? Cast<UBlueprint>(BPGC->ClassGeneratedBy) : nullptr;
if (BP)
{
TArray<UEdGraph*> Graphs;
BP->GetAllGraphs(Graphs);
for (UEdGraph* Graph : Graphs)
{
if (Graph)
{
TArray<UK2Node_EnumLiteral*> LiteralEnumNodes;
Graph->GetNodesOfClass<UK2Node_EnumLiteral>(LiteralEnumNodes);
for (UK2Node_EnumLiteral* LiteralEnumNode : LiteralEnumNodes)
{
UEnum* Enum = LiteralEnumNode ? LiteralEnumNode->Enum : nullptr;
IncludeTheHeaderInBody(Enum);
}
}
}
}
// Include classes of native subobjects
if (BPGC)
{
UClass* NativeSuperClass = BPGC->GetSuperClass();
for (; NativeSuperClass && !NativeSuperClass->HasAnyClassFlags(CLASS_Native); NativeSuperClass = NativeSuperClass->GetSuperClass())
{}
UObject* NativeCDO = NativeSuperClass ? NativeSuperClass->GetDefaultObject(false) : nullptr;
if (NativeCDO)
{
TArray<UObject*> DefaultSubobjects;
NativeCDO->GetDefaultSubobjects(DefaultSubobjects);
for (UObject* DefaultSubobject : DefaultSubobjects)
{
IncludeTheHeaderInBody(DefaultSubobject ? DefaultSubobject->GetClass() : nullptr);
}
}
}
}
FString FEmitDefaultValueHelper::HandleNonNativeComponent(FEmitterLocalContext& Context, const USCS_Node* Node, TSet<const UProperty*>& OutHandledProperties, TArray<FString>& NativeCreatedComponentProperties, const USCS_Node* ParentNode, TArray<FNonativeComponentData>& ComponenntsToInit)
{
check(Node);
check(Context.CurrentCodeType == FEmitterLocalContext::EGeneratedCodeType::CommonConstructor);
FString NativeVariablePropertyName;
UBlueprintGeneratedClass* BPGC = CastChecked<UBlueprintGeneratedClass>(Context.GetCurrentlyGeneratedClass());
if (UActorComponent* ComponentTemplate = Node->GetActualComponentTemplate(BPGC))
{
const FString VariableCleanName = Node->VariableName.ToString();
const UObjectProperty* VariableProperty = FindField<UObjectProperty>(BPGC, *VariableCleanName);
if (VariableProperty)
{
NativeVariablePropertyName = FEmitHelper::GetCppName(VariableProperty);
OutHandledProperties.Add(VariableProperty);
}
else
{
NativeVariablePropertyName = VariableCleanName;
}
Context.AddCommonSubObject_InConstructor(ComponentTemplate, NativeVariablePropertyName);
if (ComponentTemplate->GetOuter() == BPGC)
{
FNonativeComponentData NonativeComponentData;
NonativeComponentData.NativeVariablePropertyName = NativeVariablePropertyName;
NonativeComponentData.ComponentTemplate = ComponentTemplate;
UClass* ComponentClass = ComponentTemplate->GetClass();
check(ComponentClass != nullptr);
UObject* ObjectToCompare = ComponentClass->GetDefaultObject(false);
if (ComponentTemplate->HasAnyFlags(RF_InheritableComponentTemplate))
{
ObjectToCompare = Node->GetActualComponentTemplate(Cast<UBlueprintGeneratedClass>(BPGC->GetSuperClass()));
}
else
{
Context.AddLine(FString::Printf(TEXT("%s%s = CreateDefaultSubobject<%s>(TEXT(\"%s\"));")
, (VariableProperty == nullptr) ? TEXT("auto ") : TEXT("")
, *NativeVariablePropertyName
, *FEmitHelper::GetCppName(ComponentClass)
, *VariableCleanName));
NonativeComponentData.bSetNativeCreationMethod = true;
NativeCreatedComponentProperties.Add(NativeVariablePropertyName);
FString ParentVariableName;
if (ParentNode)
{
const FString CleanParentVariableName = ParentNode->VariableName.ToString();
const UObjectProperty* ParentVariableProperty = FindField<UObjectProperty>(BPGC, *CleanParentVariableName);
ParentVariableName = ParentVariableProperty ? FEmitHelper::GetCppName(ParentVariableProperty) : CleanParentVariableName;
}
else if (USceneComponent* ParentComponentTemplate = Node->GetParentComponentTemplate(CastChecked<UBlueprint>(BPGC->ClassGeneratedBy)))
{
ParentVariableName = Context.FindGloballyMappedObject(ParentComponentTemplate, USceneComponent::StaticClass());
}
NonativeComponentData.ParentVariableName = ParentVariableName;
NonativeComponentData.AttachToName = Node->AttachToName;
}
NonativeComponentData.ObjectToCompare = ObjectToCompare;
ComponenntsToInit.Add(NonativeComponentData);
}
}
// Recursively handle child nodes.
for (auto ChildNode : Node->ChildNodes)
{
HandleNonNativeComponent(Context, ChildNode, OutHandledProperties, NativeCreatedComponentProperties, Node, ComponenntsToInit);
}
return NativeVariablePropertyName;
}
EReplacementResult FBlueprintNativeCodeGenModule::IsTargetedForReplacement(const UObject* Object) const
{
if (Object == nullptr)
{
return EReplacementResult::DontReplace;
}
const UStruct* Struct = Cast<UStruct>(Object);
const UEnum* Enum = Cast<UEnum>(Object);
if (Struct == nullptr && Enum == nullptr)
{
return EReplacementResult::DontReplace;
}
EReplacementResult Result = EReplacementResult::ReplaceCompletely;
if (const UClass* BlueprintClass = Cast<UClass>(Struct))
{
if (UBlueprint* Blueprint = Cast<UBlueprint>(BlueprintClass->ClassGeneratedBy))
{
static const FBoolConfigValueHelper NativizeAnimBPOnlyWhenNonReducibleFuncitons(TEXT("BlueprintNativizationSettings"), TEXT("bNativizeAnimBPOnlyWhenNonReducibleFuncitons"));
if (NativizeAnimBPOnlyWhenNonReducibleFuncitons)
{
if (UAnimBlueprint* AnimBlueprint = Cast<UAnimBlueprint>(Blueprint))
{
ensure(AnimBlueprint->bHasBeenRegenerated);
if (AnimBlueprint->bHasAnyNonReducibleFunction == UBlueprint::EIsBPNonReducible::No)
{
UE_LOG(LogBlueprintCodeGen, Log, TEXT("AnimBP %s without non-reducible functions is excluded from nativization"), *GetPathNameSafe(Blueprint));
Result = EReplacementResult::GenerateStub;
}
}
}
const EBlueprintType UnconvertableBlueprintTypes[] = {
//BPTYPE_Const, // WTF is a "const" Blueprint?
BPTYPE_MacroLibrary,
BPTYPE_LevelScript,
};
EBlueprintType BlueprintType = Blueprint->BlueprintType;
for (int32 TypeIndex = 0; TypeIndex < ARRAY_COUNT(UnconvertableBlueprintTypes); ++TypeIndex)
{
if (BlueprintType == UnconvertableBlueprintTypes[TypeIndex])
{
Result = EReplacementResult::GenerateStub;
}
}
static const FBoolConfigValueHelper DontNativizeDataOnlyBP(TEXT("BlueprintNativizationSettings"), TEXT("bDontNativizeDataOnlyBP"));
if (DontNativizeDataOnlyBP)
{
if (FBlueprintEditorUtils::IsDataOnlyBlueprint(Blueprint))
{
return EReplacementResult::DontReplace;
}
}
for (UBlueprintGeneratedClass* ParentClassIt = Cast<UBlueprintGeneratedClass>(BlueprintClass->GetSuperClass())
; ParentClassIt; ParentClassIt = Cast<UBlueprintGeneratedClass>(ParentClassIt->GetSuperClass()))
{
EReplacementResult ParentResult = IsTargetedForReplacement(ParentClassIt);
if (ParentResult != EReplacementResult::ReplaceCompletely)
{
Result = EReplacementResult::GenerateStub;
}
}
for (TAssetSubclassOf<UBlueprint> ExcludedBlueprintTypeAsset : ExcludedBlueprintTypes)
{
UClass* ExcludedBPClass = ExcludedBlueprintTypeAsset.Get();
if (!ExcludedBPClass)
{
ExcludedBPClass = ExcludedBlueprintTypeAsset.LoadSynchronous();
}
if (ExcludedBPClass && Blueprint->IsA(ExcludedBPClass))
{
Result = EReplacementResult::GenerateStub;
}
}
}
}
auto IsObjectFromDeveloperPackage = [](const UObject* Obj) -> bool
{
return Obj && Obj->GetOutermost()->HasAllPackagesFlags(PKG_Developer);
};
auto IsDeveloperObject = [&](const UObject* Obj) -> bool
{
if (Obj)
{
if (IsObjectFromDeveloperPackage(Obj))
{
return true;
}
const UStruct* StructToTest = Obj->IsA<UStruct>() ? CastChecked<const UStruct>(Obj) : Obj->GetClass();
for (; StructToTest; StructToTest = StructToTest->GetSuperStruct())
{
if (IsObjectFromDeveloperPackage(StructToTest))
{
return true;
}
}
}
return false;
};
if (Object && (IsEditorOnlyObject(Object) || IsDeveloperObject(Object)))
{
UE_LOG(LogBlueprintCodeGen, Warning, TEXT("Object %s depends on Editor or Development stuff. It shouldn't be cooked."), *GetPathNameSafe(Object));
return EReplacementResult::DontReplace;
}
// check blacklists:
// we can't use FindObject, because we may be converting a type while saving
if (Enum && ExcludedAssetTypes.Find(Enum->GetPathName()) != INDEX_NONE)
{
Result = EReplacementResult::GenerateStub;
}
while (Struct)
{
if (ExcludedAssetTypes.Find(Struct->GetPathName()) != INDEX_NONE)
{
Result = EReplacementResult::GenerateStub;
}
Struct = Struct->GetSuperStruct();
}
if (ExcludedAssets.Contains(Object->GetOutermost()))
{
Result = EReplacementResult::GenerateStub;
}
return Result;
}
UObject* FBlueprintNativeCodeGenModule::FindReplacedNameAndOuter(UObject* Object, FName& OutName) const
{
OutName = NAME_None;
UObject* Outer = nullptr;
UActorComponent* ActorComponent = Cast<UActorComponent>(Object);
if (ActorComponent)
{
//if is child of a BPGC and not child of a CDO
UBlueprintGeneratedClass* BPGC = nullptr;
for (UObject* OuterObject = ActorComponent->GetOuter(); OuterObject && !BPGC; OuterObject = OuterObject->GetOuter())
{
if (OuterObject->HasAnyFlags(RF_ClassDefaultObject))
{
return Outer;
}
BPGC = Cast<UBlueprintGeneratedClass>(OuterObject);
}
for (UBlueprintGeneratedClass* SuperBPGC = BPGC; SuperBPGC && (OutName == NAME_None); SuperBPGC = Cast<UBlueprintGeneratedClass>(SuperBPGC->GetSuperClass()))
{
if (SuperBPGC->InheritableComponentHandler)
{
FComponentKey FoundKey = SuperBPGC->InheritableComponentHandler->FindKey(ActorComponent);
if (FoundKey.IsValid())
{
OutName = FoundKey.IsSCSKey() ? FoundKey.GetSCSVariableName() : ActorComponent->GetFName();
Outer = BPGC->GetDefaultObject(false);
break;
}
}
if (SuperBPGC->SimpleConstructionScript)
{
for (auto Node : SuperBPGC->SimpleConstructionScript->GetAllNodes())
{
if (Node->ComponentTemplate == ActorComponent)
{
OutName = Node->VariableName;
if (OutName != NAME_None)
{
Outer = BPGC->GetDefaultObject(false);
break;
}
}
}
}
}
}
if (Outer && (EReplacementResult::ReplaceCompletely == IsTargetedForReplacement(Object->GetClass())))
{
UE_LOG(LogBlueprintCodeGen, Log, TEXT("Object '%s' has replaced name '%s' and outer: '%s'"), *GetPathNameSafe(Object), *OutName.ToString(), *GetPathNameSafe(Outer));
return Outer;
}
return nullptr;
}
UActorComponent* AActor::AddComponent(FName TemplateName, bool bManualAttachment, const FTransform& RelativeTransform, const UObject* ComponentTemplateContext)
{
UActorComponent* Template = NULL;
UBlueprintGeneratedClass* BlueprintGeneratedClass = Cast<UBlueprintGeneratedClass>((ComponentTemplateContext != NULL) ? ComponentTemplateContext->GetClass() : GetClass());
while(BlueprintGeneratedClass != NULL)
{
Template = BlueprintGeneratedClass->FindComponentTemplateByName(TemplateName);
if(NULL != Template)
{
break;
}
BlueprintGeneratedClass = Cast<UBlueprintGeneratedClass>(BlueprintGeneratedClass->GetSuperClass());
}
UActorComponent* NewActorComp = CreateComponentFromTemplate(Template);
if(NewActorComp != NULL)
{
// The user has the option of doing attachment manually where they have complete control or via the automatic rule
// that the first component added becomes the root component, with subsequent components attached to the root.
USceneComponent* NewSceneComp = Cast<USceneComponent>(NewActorComp);
bool bDeferRegisterStaticComponent = false;
EComponentMobility::Type OriginalMobility = EComponentMobility::Movable;
if(NewSceneComp != NULL)
{
// Components with Mobility set to EComponentMobility::Static or EComponentMobility::Stationary can't be properly set up in UCS (all changes will be rejected
// due to EComponentMobility::Static flag) so we're going to temporarily change the flag and defer the registration until UCS has finished.
bDeferRegisterStaticComponent = bRunningUserConstructionScript && NewSceneComp->Mobility != EComponentMobility::Movable;
OriginalMobility = NewSceneComp->Mobility;
if (bDeferRegisterStaticComponent)
{
NewSceneComp->Mobility = EComponentMobility::Movable;
}
if (!bManualAttachment)
{
if (RootComponent == NULL)
{
RootComponent = NewSceneComp;
}
else
{
NewSceneComp->AttachTo(RootComponent);
}
}
NewSceneComp->SetRelativeTransform(RelativeTransform);
}
// Call function to notify component it has been created
NewActorComp->OnComponentCreated();
if (bDeferRegisterStaticComponent)
{
// Defer registration until after UCS has completed.
FDeferRegisterStaticComponents::Get().DeferStaticComponent(this, NewSceneComp, OriginalMobility);
}
else
{
// Register component, which will create physics/rendering state, now component is in correct position
NewActorComp->RegisterComponent();
}
}
return NewActorComp;
}
