MaterialExpressionSettings.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "CoreMinimal.h"
#include "Delegates/Delegate.h"
#include "UObject/TopLevelAssetPath.h"
 
#if WITH_EDITOR
 
class FMaterialExpressionSettings
{
public:
    static ENGINE_API FMaterialExpressionSettings* Get();
 
    DECLARE_DELEGATE_RetVal_OneParam(bool, FOnIsClassPathAllowed, const FTopLevelAssetPath& /*InClassPath*/);
 
    ENGINE_API void RegisterIsClassPathAllowedDelegate(const FName OwnerName, FOnIsClassPathAllowed Delegate);
    ENGINE_API void UnregisterIsClassPathAllowedDelegate(const FName OwnerName);
    ENGINE_API bool IsClassPathAllowed(const FTopLevelAssetPath& InClassPath) const;
    ENGINE_API bool HasClassPathFiltering() const;
 
private:
    FMaterialExpressionSettings() = default;
    ~FMaterialExpressionSettings() = default;
 
    TMap<FName, FOnIsClassPathAllowed> IsClassPathAllowedDelegates;
};
 
#endif // WITH_EDITOR
 
bool IsExpressionClassPermitted(const UClass* const Class);