LevelInstanceActorDesc.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#if WITH_EDITOR
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "UObject/GCObject.h"
#include "UObject/ObjectPtr.h"
#include "Containers/Map.h"
#include "WorldPartition/WorldPartitionActorDesc.h"
#include "WorldPartition/HLOD/StandaloneHLODActor.h"
#include "WorldPartition/LevelInstance/LevelInstancePropertyOverrideDesc.h"
#include "WorldPartition/Filter/WorldPartitionActorFilter.h"
 
class ULevelInstanceSubsystem;
class FWorldPartitionActorDescInstance;
class IStreamingGenerationErrorHandler;
class IWorldPartitionActorDescInstanceView;
class UActorDescContainerInstance;
enum class ELevelInstanceRuntimeBehavior : uint8;
 
class FLevelInstanceActorDesc : public FWorldPartitionActorDesc
{
public:
    ENGINE_API FLevelInstanceActorDesc();
    ENGINE_API virtual ~FLevelInstanceActorDesc() override;
        
    ENGINE_API virtual bool IsChildContainerInstance() const override;
 
    virtual EWorldPartitionActorFilterType GetChildContainerFilterType() const { return IsChildContainerInstance() ? EWorldPartitionActorFilterType::Loading : EWorldPartitionActorFilterType::None; }
    virtual FName GetChildContainerPackage() const override { return WorldAsset.GetLongPackageFName(); }
    virtual FString GetChildContainerName() const override;
    virtual const FWorldPartitionActorFilter* GetChildContainerFilter() const override { return &Filter; }
        
    ENGINE_API virtual void CheckForErrors(const IWorldPartitionActorDescInstanceView* InActorDescView, IStreamingGenerationErrorHandler* ErrorHandler) const override;
 
    virtual UActorDescContainer* GetChildContainer() const override { check(IsChildContainerInstance()); return ChildContainer.Get(); }
 
    virtual bool HasStandaloneHLOD() const override { return bHasStandaloneHLOD; }
    virtual ELevelInstanceRuntimeBehavior GetDesiredRuntimeBehavior() const { return DesiredRuntimeBehavior; }
 
protected:
    ENGINE_API virtual void Init(const AActor* InActor) override;
    ENGINE_API virtual void Init(const FWorldPartitionActorDescInitData& DescData) override;
    ENGINE_API virtual bool Equals(const FWorldPartitionActorDesc* Other) const override;
    ENGINE_API virtual void TransferFrom(const FWorldPartitionActorDesc* From) override;
    virtual uint32 GetSizeOf() const override { return sizeof(FLevelInstanceActorDesc); }
    ENGINE_API virtual void Serialize(FArchive& Ar) override;
    ENGINE_API virtual void SetContainer(UActorDescContainer* InContainer) override;
    ENGINE_API virtual UActorDescContainerInstance* CreateChildContainerInstance(const FWorldPartitionActorDescInstance* InActorDescInstance) const override;
    ENGINE_API virtual bool GetChildContainerInstance(const FWorldPartitionActorDescInstance* InActorDescInstance, FContainerInstance& OutContainerInstance) const override;
    ENGINE_API virtual UWorldPartition* GetLoadedChildWorldPartition(const FWorldPartitionActorDescInstance* InActorDescInstance) const override;
    ENGINE_API FTransform GetChildContainerTransform() const;
    FLevelInstancePropertyOverrideDesc* GetOverrideDesc() const { return PropertyOverrideDesc.Get(); }
    ENGINE_API static bool ValidateCircularReference(const UActorDescContainerInstance* InParentContainer, FName InChildContainerPackage);
 
    FSoftObjectPath WorldAsset;
    ELevelInstanceRuntimeBehavior DesiredRuntimeBehavior;
 
    TWeakObjectPtr<UActorDescContainer> ChildContainer;
 
    FWorldPartitionActorFilter Filter;
    bool bIsChildContainerInstance;
    bool bHasStandaloneHLOD;
 
    FSoftObjectPath PropertyOverrideAsset;
    TSharedPtr<FLevelInstancePropertyOverrideDesc> PropertyOverrideDesc;
private:
    ENGINE_API bool IsChildContainerInstanceInternal() const;
    ENGINE_API void RegisterChildContainer();
    ENGINE_API void UnregisterChildContainer();
    ENGINE_API void UpdateBounds();
};
#endif