LevelInstancePropertyOverrideAsset.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreFwd.h"
#include "UObject/ObjectMacros.h"
#include "UObject/UObjectGlobals.h"
#include "UObject/Object.h"
#include "WorldPartition/WorldPartitionActorContainerID.h"
#include "WorldPartition/WorldPartitionPropertyOverride.h"
#include "LevelInstance/LevelInstanceTypes.h"
 
#include "LevelInstancePropertyOverrideAsset.generated.h"
 
class ULevelStreamingLevelInstanceEditorPropertyOverride;
class ILevelInstanceInterface;
class ULevelStreamingLevelInstanceEditorPropertyOverride;
class FLevelInstancePropertyOverrideDesc;
 
struct FLevelInstanceActorPropertyOverride
{
    FLevelInstanceActorPropertyOverride(const FLevelInstanceID& InLevelInstanceID, const FActorPropertyOverride* InActorPropertyOverride)
        : LevelInstanceID(InLevelInstanceID)
        , ActorPropertyOverride(InActorPropertyOverride) {}
 
    FLevelInstanceID LevelInstanceID;
    const FActorPropertyOverride* ActorPropertyOverride = nullptr;
};
 
UCLASS(MinimalAPI, NotBlueprintable)
class ULevelInstancePropertyOverrideAsset : public UWorldPartitionPropertyOverride
{
    GENERATED_BODY()
public:
    ULevelInstancePropertyOverrideAsset() {}
    virtual ~ULevelInstancePropertyOverrideAsset() {}
        
#if WITH_EDITOR
    const TSoftObjectPtr<UWorld>& GetWorldAsset() const { return WorldAsset; }
            
private:
    // Begin UWorldPartitionPropertyOverride Interface
    using UWorldPartitionPropertyOverride::ApplyPropertyOverrides;
    // End UWorldPartitionPropertyOverride Interface
 
    static bool SerializeActorPropertyOverrides(ULevelStreamingLevelInstanceEditorPropertyOverride* InLevelStreaming, AActor* InActor, bool bForReset, FActorPropertyOverride& OutActorPropertyOverrides);
 
    void Initialize(const TSoftObjectPtr<UWorld> InWorldAsset) { WorldAsset = InWorldAsset; }
    void SerializePropertyOverrides(ILevelInstanceInterface* InLevelInstanceOverrideOwner, ULevelStreamingLevelInstanceEditorPropertyOverride* InLevelStreamingInterface);
    void ResetPropertyOverridesForActor(ULevelStreamingLevelInstanceEditorPropertyOverride* InLevelStreamingInterface, AActor* InActor);
    
    // Return non instanced SoftObjectPtr to this Object
    TSoftObjectPtr<ULevelInstancePropertyOverrideAsset> GetSourceAssetPtr() const;
 
    // Return FActorContainerPath to InChild relative to InParent
    FActorContainerPath GetContainerPropertyOverridePath(ILevelInstanceInterface* InParent, ILevelInstanceInterface* InChild);
 
    friend class ULevelInstanceSubsystem;
    friend class ULevelStreamingLevelInstance;
    friend class ULevelStreamingLevelInstanceEditorPropertyOverride;
    friend class FLevelInstancePropertyOverrideDesc;
#endif
 
#if WITH_EDITORONLY_DATA
    // Not editable for now, user can reset the property overrides on its owning level instance to change the loaded world
    UPROPERTY(VisibleAnywhere, Category = Level, meta = (NoCreate, DisplayName = "Level", ToolTip = "Reset Property Override to change level"))
    TSoftObjectPtr<UWorld> WorldAsset;
 
    UPROPERTY(Transient)
    bool bSavingOverrideEdit = false;
#endif
};