UnrealEngineUWP/Engine/Plugins/Runtime/Metasound/Source/MetasoundEditor/Private/MetasoundDetailCustomization.cpp

// Copyright Epic Games, Inc. All Rights Reserved.
#include "MetasoundDetailCustomization.h"

#include "Containers/Set.h"
#include "Delegates/Delegate.h"
#include "DetailCategoryBuilder.h"
#include "DetailLayoutBuilder.h"
#include "DetailWidgetRow.h"
#include "Framework/Notifications/NotificationManager.h"
#include "IAudioParameterInterfaceRegistry.h"
#include "IAudioParameterTransmitter.h"
#include "IDetailGroup.h"
#include "Input/Events.h"
#include "Interfaces/MetasoundFrontendInterfaceRegistry.h"
#include "MetasoundAssetBase.h"
#include "MetasoundBuilderSubsystem.h"
#include "MetasoundEditor.h"
#include "MetasoundEditorGraphBuilder.h"
#include "MetasoundEditorSettings.h"
#include "MetasoundFrontend.h"
#include "MetasoundFrontendController.h"
#include "MetasoundFrontendSearchEngine.h"
#include "MetasoundSource.h"
#include "MetasoundUObjectRegistry.h"
#include "PropertyCustomizationHelpers.h"
#include "PropertyEditorDelegates.h"
#include "PropertyHandle.h"
#include "PropertyRestriction.h"
#include "SGraphPalette.h"
#include "ScopedTransaction.h"
#include "Sound/SoundWave.h"
#include "Styling/CoreStyle.h"
#include "Styling/SlateColor.h"
#include "Styling/SlateTypes.h"
#include "Templates/Casts.h"
#include "Templates/SharedPointer.h"
#include "UObject/WeakObjectPtr.h"
#include "UObject/WeakObjectPtrTemplates.h"
#include "Widgets/Input/SCheckBox.h"
#include "Widgets/Notifications/SNotificationList.h"
#include "Widgets/Text/STextBlock.h"


#define LOCTEXT_NAMESPACE "MetaSoundEditor"


namespace Metasound
{
	namespace Editor
	{
		FName BuildChildPath(const FString& InBasePath, FName InPropertyName)
		{
			return FName(InBasePath + TEXT(".") + InPropertyName.ToString());
		}

		FName BuildChildPath(const FName& InBasePath, FName InPropertyName)
		{
			return FName(InBasePath.ToString() + TEXT(".") + InPropertyName.ToString());
		}

		FMetasoundDetailCustomization::FMetasoundDetailCustomization(FName InDocumentPropertyName)
			: IDetailCustomization()
			, DocumentPropertyName(InDocumentPropertyName)
		{
			IsGraphEditableAttribute = TAttribute<bool>::Create([this]()
			{
				using namespace Metasound;
				using namespace Metasound::Frontend;
				if (const FMetasoundAssetBase* MetaSoundAsset = IMetasoundUObjectRegistry::Get().GetObjectAsAssetBase(MetaSound.Get()))
				{
					FConstGraphHandle GraphHandle = MetaSoundAsset->GetRootGraphHandle();
					return GraphHandle->GetGraphStyle().bIsGraphEditable;
				}

				return false;
			});
		}

		FName FMetasoundDetailCustomization::GetInterfaceVersionsPath() const
		{
			return Metasound::Editor::BuildChildPath(DocumentPropertyName, GET_MEMBER_NAME_CHECKED(FMetasoundFrontendDocument, Interfaces));
		}

		FName FMetasoundDetailCustomization::GetMetadataRootClassPath() const
		{
			return Metasound::Editor::BuildChildPath(DocumentPropertyName, GET_MEMBER_NAME_CHECKED(FMetasoundFrontendDocument, RootGraph));
		}

		FName FMetasoundDetailCustomization::GetMetadataPropertyPath() const
		{
			const FName RootClass = FName(GetMetadataRootClassPath());
			return Metasound::Editor::BuildChildPath(RootClass, GET_MEMBER_NAME_CHECKED(FMetasoundFrontendClass, Metadata));
		}

		void FMetasoundDetailCustomization::CustomizeDetails(IDetailLayoutBuilder& DetailLayout)
		{
			using namespace Frontend;

			TArray<TWeakObjectPtr<UObject>> Objects;
			DetailLayout.GetObjectsBeingCustomized(Objects);

			// Only support modifying a single MetaSound at a time (Multiple
			// MetaSound editing will be covered most likely by separate tool).
			if (Objects.Num() > 1)
			{
				return;
			}
			MetaSound = Objects.Last();
			if (!MetaSound.IsValid())
			{
				return;
			}

			TWeakObjectPtr<UMetaSoundSource> MetaSoundSource = Cast<UMetaSoundSource>(MetaSound.Get());

			// MetaSound patches don't have source settings, so view MetaSound settings by default 
			EMetasoundActiveDetailView DetailsView = EMetasoundActiveDetailView::Metasound;
			if (MetaSoundSource.IsValid())
			{
				// Show source settings by default unless previously set
				DetailsView = EMetasoundActiveDetailView::General;
				if (const UMetasoundEditorSettings* EditorSettings = GetDefault<UMetasoundEditorSettings>())
				{
					DetailsView = EditorSettings->DetailView;
				}
			}

			switch (DetailsView)
			{
				case EMetasoundActiveDetailView::Metasound:
				{
					IDetailCategoryBuilder& GeneralCategoryBuilder = DetailLayout.EditCategory("MetaSound");
					const FName AuthorPropertyPath = BuildChildPath(GetMetadataPropertyPath(), FMetasoundFrontendClassMetadata::GetAuthorPropertyName());
					const FName CategoryHierarchyPropertyPath = BuildChildPath(GetMetadataPropertyPath(), FMetasoundFrontendClassMetadata::GetCategoryHierarchyPropertyName());
					const FName DescPropertyPath = BuildChildPath(GetMetadataPropertyPath(), FMetasoundFrontendClassMetadata::GetDescriptionPropertyName());
					const FName DisplayNamePropertyPath = BuildChildPath(GetMetadataPropertyPath(), FMetasoundFrontendClassMetadata::GetDisplayNamePropertyName());
					const FName KeywordsPropertyPath = BuildChildPath(GetMetadataPropertyPath(), FMetasoundFrontendClassMetadata::GetKeywordsPropertyName());
					const FName IsDeprecatedPropertyPath = BuildChildPath(GetMetadataPropertyPath(), FMetasoundFrontendClassMetadata::GetIsDeprecatedPropertyName());

					const FName ClassNamePropertyPath = BuildChildPath(GetMetadataPropertyPath(), FMetasoundFrontendClassMetadata::GetClassNamePropertyName());
					const FName ClassNameNamePropertyPath = BuildChildPath(ClassNamePropertyPath, GET_MEMBER_NAME_CHECKED(FMetasoundFrontendClassName, Name));

					const FName VersionPropertyPath = BuildChildPath(GetMetadataPropertyPath(), FMetasoundFrontendClassMetadata::GetVersionPropertyName());
					const FName MajorVersionPropertyPath = BuildChildPath(VersionPropertyPath, GET_MEMBER_NAME_CHECKED(FMetasoundFrontendVersionNumber, Major));
					const FName MinorVersionPropertyPath = BuildChildPath(VersionPropertyPath, GET_MEMBER_NAME_CHECKED(FMetasoundFrontendVersionNumber, Minor));

					const FName InterfaceVersionsPropertyPath = GetInterfaceVersionsPath();

					TSharedPtr<IPropertyHandle> AuthorHandle = DetailLayout.GetProperty(AuthorPropertyPath);
					TSharedPtr<IPropertyHandle> CategoryHierarchyHandle = DetailLayout.GetProperty(CategoryHierarchyPropertyPath);
					TSharedPtr<IPropertyHandle> ClassNameHandle = DetailLayout.GetProperty(ClassNameNamePropertyPath);
					TSharedPtr<IPropertyHandle> DisplayNameHandle = DetailLayout.GetProperty(DisplayNamePropertyPath);
					TSharedPtr<IPropertyHandle> DescHandle = DetailLayout.GetProperty(DescPropertyPath);
					TSharedPtr<IPropertyHandle> KeywordsHandle = DetailLayout.GetProperty(KeywordsPropertyPath);
					TSharedPtr<IPropertyHandle> IsDeprecatedHandle = DetailLayout.GetProperty(IsDeprecatedPropertyPath);
					TSharedPtr<IPropertyHandle> InterfaceVersionsHandle = DetailLayout.GetProperty(InterfaceVersionsPropertyPath);
					TSharedPtr<IPropertyHandle> MajorVersionHandle = DetailLayout.GetProperty(MajorVersionPropertyPath);
					TSharedPtr<IPropertyHandle> MinorVersionHandle = DetailLayout.GetProperty(MinorVersionPropertyPath);

					// Invalid for UMetaSounds
					TSharedPtr<IPropertyHandle> OutputFormat = DetailLayout.GetProperty(GET_MEMBER_NAME_CHECKED(UMetaSoundSource, OutputFormat));
					if (OutputFormat.IsValid())
					{
						if (MetaSoundSource.IsValid())
						{
							OutputFormat->SetOnPropertyValuePreChange(FSimpleDelegate::CreateLambda([Source = MetaSoundSource]()
							{
								if (Source.IsValid())
								{
									TSharedPtr<FEditor> ParentEditor = FGraphBuilder::GetEditorForMetasound(*Source.Get());
									if (ParentEditor.IsValid())
									{
										ParentEditor->Stop();
									};
								}
							}));

							OutputFormat->SetOnPropertyValueChanged(FSimpleDelegate::CreateLambda([Source = MetaSoundSource]()
							{
								if (Source.IsValid())
								{
									TSharedPtr<FEditor> ParentEditor = FGraphBuilder::GetEditorForMetasound(*Source.Get());
									if (ParentEditor.IsValid())
									{
										ParentEditor->CreateAnalyzers();
									};
								}
							}));
						}

						TSharedRef<SWidget> OutputFormatValueWidget = OutputFormat->CreatePropertyValueWidget();
						OutputFormatValueWidget->SetEnabled(IsGraphEditableAttribute);

						static const FText OutputFormatName = LOCTEXT("MetasoundOutputFormatPropertyName", "Output Format");
						GeneralCategoryBuilder.AddCustomRow(OutputFormatName)
						.NameContent()
						[
							OutputFormat->CreatePropertyNameWidget()
						]
						.ValueContent()
						[
							OutputFormatValueWidget
						];

						OutputFormat->MarkHiddenByCustomization();
					}

					// Updates FText properties on open editors if required
					{
						FSimpleDelegate RegisterOnChange = FSimpleDelegate::CreateLambda([this]()
							{
								if (MetaSound.IsValid())
								{
									if (FMetasoundAssetBase* MetaSoundAsset = IMetasoundUObjectRegistry::Get().GetObjectAsAssetBase(MetaSound.Get()))
									{
										MetaSoundAsset->GetDocumentChecked().RootGraph.Style.UpdateChangeID();
									}
									constexpr bool bForceViewSynchronization = true;
									FGraphBuilder::RegisterGraphWithFrontend(*MetaSound.Get(), bForceViewSynchronization);
								}
							});
						AuthorHandle->SetOnChildPropertyValueChanged(RegisterOnChange);
						DescHandle->SetOnPropertyValueChanged(RegisterOnChange);
						DisplayNameHandle->SetOnPropertyValueChanged(RegisterOnChange);
						KeywordsHandle->SetOnPropertyValueChanged(RegisterOnChange);
						KeywordsHandle->SetOnChildPropertyValueChanged(RegisterOnChange);
						IsDeprecatedHandle->SetOnPropertyValueChanged(RegisterOnChange);
					}

					GeneralCategoryBuilder.AddProperty(DisplayNameHandle);
					GeneralCategoryBuilder.AddProperty(DescHandle);
					GeneralCategoryBuilder.AddProperty(AuthorHandle);
					GeneralCategoryBuilder.AddProperty(IsDeprecatedHandle);
					GeneralCategoryBuilder.AddProperty(MajorVersionHandle);
					GeneralCategoryBuilder.AddProperty(MinorVersionHandle);

					static const FText ClassGuidName = LOCTEXT("MetasoundClassGuidPropertyName", "Class Guid");
					GeneralCategoryBuilder.AddCustomRow(ClassGuidName).NameContent()
					[
						SNew(SHorizontalBox)
						+ SHorizontalBox::Slot()
						.VAlign(VAlign_Center)
						[
							SNew(STextBlock)
							.Text(ClassGuidName)
							.Font(FAppStyle::GetFontStyle(TEXT("PropertyWindow.NormalFont")))
						]
					]
					.ValueContent()
					[
						ClassNameHandle->CreatePropertyValueWidget()
					];
					GeneralCategoryBuilder.AddProperty(CategoryHierarchyHandle);
					GeneralCategoryBuilder.AddProperty(KeywordsHandle);

					DetailLayout.HideCategory("Attenuation");
					DetailLayout.HideCategory("Developer");
					DetailLayout.HideCategory("Effects");
					DetailLayout.HideCategory("Loading");
					DetailLayout.HideCategory("Modulation");
					DetailLayout.HideCategory("Sound");
					DetailLayout.HideCategory("Voice Management");
				}
				break;

				case EMetasoundActiveDetailView::General:
				default:
					DetailLayout.HideCategory("MetaSound");

					TArray<TSharedRef<IPropertyHandle>>DeveloperProperties;
					TArray<TSharedRef<IPropertyHandle>>SoundProperties;

					DetailLayout.EditCategory("Sound")
						.GetDefaultProperties(SoundProperties);
					DetailLayout.EditCategory("Developer")
						.GetDefaultProperties(DeveloperProperties);

					auto HideProperties = [](const TSet<FName>& PropsToHide, const TArray<TSharedRef<IPropertyHandle>>& Properties)
					{
						for (TSharedRef<IPropertyHandle> Property : Properties)
						{
							if (PropsToHide.Contains(Property->GetProperty()->GetFName()))
							{
								Property->MarkHiddenByCustomization();
							}
						}
					};

					static const TSet<FName> SoundPropsToHide =
					{
						GET_MEMBER_NAME_CHECKED(USoundWave, bLooping),
						GET_MEMBER_NAME_CHECKED(USoundWave, SoundGroup)
					};
					HideProperties(SoundPropsToHide, SoundProperties);

					static const TSet<FName> DeveloperPropsToHide =
					{
						GET_MEMBER_NAME_CHECKED(USoundBase, Duration),
						GET_MEMBER_NAME_CHECKED(USoundBase, MaxDistance),
						GET_MEMBER_NAME_CHECKED(USoundBase, TotalSamples)
					};
					HideProperties(DeveloperPropsToHide, DeveloperProperties);

					break;
			}

			// Hack to hide parent structs for nested metadata properties
			DetailLayout.HideCategory("CustomView");

			DetailLayout.HideCategory("Advanced");
			DetailLayout.HideCategory("Analysis");
			DetailLayout.HideCategory("Curves");
			DetailLayout.HideCategory("File Path");
			DetailLayout.HideCategory("Format");
			DetailLayout.HideCategory("Info");
			DetailLayout.HideCategory("Loading");
			DetailLayout.HideCategory("Playback");
			DetailLayout.HideCategory("Subtitles");
			DetailLayout.HideCategory("Waveform Processing");;
		}

		FMetasoundInterfacesDetailCustomization::FMetasoundInterfacesDetailCustomization()
		{
			IsGraphEditableAttribute = TAttribute<bool>::Create([this]()
			{
				using namespace Metasound;
				using namespace Metasound::Frontend;
				if (const FMetasoundAssetBase* MetaSoundAsset = IMetasoundUObjectRegistry::Get().GetObjectAsAssetBase(MetaSound.Get()))
				{
					FConstGraphHandle GraphHandle = MetaSoundAsset->GetRootGraphHandle();
					return GraphHandle->GetGraphStyle().bIsGraphEditable;
				}

				return false;
			});
		}

		void FMetasoundInterfacesDetailCustomization::CustomizeDetails(IDetailLayoutBuilder& DetailLayout)
		{
			TArray<TWeakObjectPtr<UObject>> Objects;
			DetailLayout.GetObjectsBeingCustomized(Objects);

			// Only support modifying a single MetaSound at a time (Multiple
			// MetaSound editing will be covered most likely by separate tool).
			if (Objects.Num() > 1)
			{
				return;
			}
			if (UMetasoundInterfacesView* InterfacesView = CastChecked<UMetasoundInterfacesView>(Objects.Last()))
			{
				MetaSound = InterfacesView->GetMetasound();
			}

			UpdateInterfaceNames();

			SAssignNew(InterfaceComboBox, SSearchableComboBox)
				.OptionsSource(&AddableInterfaceNames)
				.OnGenerateWidget_Lambda([](TSharedPtr<FString> InItem)
				{
					return SNew(STextBlock)
						.Text(FText::FromString(*InItem));
				})
				.OnSelectionChanged_Lambda([this](TSharedPtr<FString> NameToAdd, ESelectInfo::Type InSelectInfo)
				{
					using namespace Metasound;
					using namespace Metasound::Frontend;

					FMetasoundAssetBase* MetaSoundAsset = IMetasoundUObjectRegistry::Get().GetObjectAsAssetBase(MetaSound.Get());
					if (!ensure(MetaSoundAsset))
					{
						return;
					}

					if (InSelectInfo != ESelectInfo::OnNavigation)
					{
						FMetasoundFrontendInterface InterfaceToAdd;
						const FName InterfaceName { *NameToAdd.Get() };
						if (ensure(ISearchEngine::Get().FindInterfaceWithHighestVersion(InterfaceName, InterfaceToAdd)))
						{
							const FScopedTransaction Transaction(FText::Format(LOCTEXT("AddInterfaceTransactionFormat", "Add MetaSound Interface '{0}'"), FText::FromString(InterfaceToAdd.Version.ToString())));
							MetaSound.Get()->Modify();
							MetaSoundAsset->GetGraphChecked().Modify();

							TScriptInterface<IMetaSoundDocumentInterface> MetaSoundPatchDocInterface = MetaSound.Get();
							FMetaSoundFrontendDocumentBuilder Builder(MetaSoundPatchDocInterface);
							FModifyInterfaceOptions Options({ }, { InterfaceToAdd });
							Options.bSetDefaultNodeLocations = false; // Don't automatically add nodes to ed graph
							Builder.ModifyInterfaces(MoveTemp(Options));
						}

						UpdateInterfaceNames();
						InterfaceComboBox->RefreshOptions();
						FGraphBuilder::RegisterGraphWithFrontend(*MetaSound.Get());
					}
				})
				.Content()
				[
					SNew(STextBlock)
					.Text(LOCTEXT("UpdateInterfaceAction", "Add Interface..."))
					.IsEnabled(IsGraphEditableAttribute)
				];

			TSharedRef<SWidget> InterfaceUtilities = SNew(SHorizontalBox)
				+ SHorizontalBox::Slot()
				.Padding(2.0f)
				.HAlign(HAlign_Left)
				.VAlign(VAlign_Center)
				.AutoWidth()
				[
					InterfaceComboBox->AsShared()
				]
			+ SHorizontalBox::Slot()
				.Padding(2.0f)
				.HAlign(HAlign_Left)
				.VAlign(VAlign_Center)
				.AutoWidth()
				[
					PropertyCustomizationHelpers::MakeDeleteButton(FSimpleDelegate::CreateLambda([this]()
					{
						using namespace Frontend;

						FMetasoundAssetBase* MetaSoundAsset = IMetasoundUObjectRegistry::Get().GetObjectAsAssetBase(MetaSound.Get());
						if (!ensure(MetaSoundAsset))
						{
							return;
						}

						TArray<FMetasoundFrontendInterface> ImplementedInterfaces;
						Algo::Transform(ImplementedInterfaceNames, ImplementedInterfaces, [](const FName& Name)
						{
							FMetasoundFrontendInterface Interface;
							ISearchEngine::Get().FindInterfaceWithHighestVersion(Name, Interface);
							return Interface;
						});

						{
							const FScopedTransaction Transaction(LOCTEXT("RemoveAllInterfacesTransaction", "Remove All MetaSound Interfaces"));
							MetaSound.Get()->Modify();
							MetaSoundAsset->GetGraphChecked().Modify();

							FDocumentHandle DocumentHandle = MetaSoundAsset->GetDocumentHandle();
							FModifyRootGraphInterfaces({ ImplementedInterfaces }, { }).Transform(DocumentHandle);
						}

						UpdateInterfaceNames();
						InterfaceComboBox->RefreshOptions();
						FGraphBuilder::RegisterGraphWithFrontend(*MetaSound.Get());

					}), LOCTEXT("RemoveInterfaceTooltip1", "Removes all interfaces from the given MetaSound."))
				];
			InterfaceUtilities->SetEnabled(IsGraphEditableAttribute);

			const FText HeaderName = LOCTEXT("InterfacesGroupDisplayName", "Interfaces");
			IDetailCategoryBuilder& InterfaceCategory = DetailLayout.EditCategory("Interfaces", HeaderName);

			InterfaceCategory.AddCustomRow(HeaderName)
			[
				InterfaceUtilities
			];

			auto CreateInterfaceEntryWidget = [&](FName InInterfaceName) -> TSharedRef<SWidget>
			{
				using namespace Frontend;

				FMetasoundFrontendInterface InterfaceEntry;
				if (!ensure(ISearchEngine::Get().FindInterfaceWithHighestVersion(InInterfaceName, InterfaceEntry)))
				{
					return SNullWidget::NullWidget;
				}

				TSharedRef<SWidget> RemoveButtonWidget = PropertyCustomizationHelpers::MakeDeleteButton(FSimpleDelegate::CreateLambda([this, InInterfaceName, InterfaceEntry]()
				{
					using namespace Frontend;

					FMetasoundAssetBase* MetaSoundAsset = IMetasoundUObjectRegistry::Get().GetObjectAsAssetBase(MetaSound.Get());
					if (!ensure(MetaSoundAsset))
					{
						return;
					}

					{
						const FScopedTransaction Transaction(FText::Format(LOCTEXT("RemoveInterfaceTransactionFormat", "Remove MetaSound Interface '{0}'"), FText::FromString(InterfaceEntry.Version.ToString())));
						MetaSound.Get()->Modify();
						MetaSoundAsset->GetGraphChecked().Modify();

						FDocumentHandle DocumentHandle = MetaSoundAsset->GetDocumentHandle();
						FModifyRootGraphInterfaces({ InterfaceEntry }, { }).Transform(DocumentHandle);
					}

					UpdateInterfaceNames();
					InterfaceComboBox->RefreshOptions();
					FGraphBuilder::RegisterGraphWithFrontend(*MetaSound.Get());

				}), LOCTEXT("RemoveInterfaceTooltip2", "Removes the associated interface from the MetaSound."));

				TSharedRef<SWidget> EntryWidget = SNew(SHorizontalBox)
					+ SHorizontalBox::Slot()
					.Padding(2.0f)
					.HAlign(HAlign_Center)
					.VAlign(VAlign_Center)
					.AutoWidth()
					[
						SNew(STextBlock)
						.Text(FText::FromName(InterfaceEntry.Version.Name))
					]
				+ SHorizontalBox::Slot()
					.Padding(2.0f)
					.HAlign(HAlign_Center)
					.VAlign(VAlign_Center)
					.AutoWidth()
					[
						RemoveButtonWidget
					];

				EntryWidget->SetEnabled(IsGraphEditableAttribute);
				return EntryWidget;
			};

			TArray<FName> InterfaceNames = ImplementedInterfaceNames.Array();
			InterfaceNames.Sort([](const FName& A, const FName& B) { return A.LexicalLess(B); });
			for (const FName& InterfaceName : InterfaceNames)
			{
				InterfaceCategory.AddCustomRow(FText::FromName(InterfaceName))
				[
					CreateInterfaceEntryWidget(InterfaceName)
				];
			}
		}

		void FMetasoundInterfacesDetailCustomization::UpdateInterfaceNames()
		{
			AddableInterfaceNames.Reset();
			ImplementedInterfaceNames.Reset();

			const UObject* MetaSoundObject = MetaSound.Get();
			if (const FMetasoundAssetBase* MetaSoundAsset = IMetasoundUObjectRegistry::Get().GetObjectAsAssetBase(MetaSoundObject))
			{
				auto GetVersionName = [](const FMetasoundFrontendVersion& Version) { return Version.Name; };
				const UClass* MetaSoundClass = MetaSoundObject->GetClass();
				auto CanAddOrRemoveInterface = [ClassName = MetaSoundClass->GetClassPathName()](const FMetasoundFrontendVersion& Version)
				{
					using namespace Frontend;

					const FInterfaceRegistryKey Key = GetInterfaceRegistryKey(Version);
					if (const IInterfaceRegistryEntry* Entry = IInterfaceRegistry::Get().FindInterfaceRegistryEntry(Key))
					{
						if (const FMetasoundFrontendInterfaceUClassOptions* Options = Entry->GetInterface().FindClassOptions(ClassName))
						{
							return Options->bIsModifiable;
						}

						// If no options are found for the given class, interface is modifiable by default.
						return true;
					}

					return false;
				};

				const TSet<FMetasoundFrontendVersion>& ImplementedInterfaces = MetaSoundAsset->GetDocumentChecked().Interfaces;
				Algo::TransformIf(ImplementedInterfaces, ImplementedInterfaceNames, CanAddOrRemoveInterface, GetVersionName);

				TArray<FMetasoundFrontendInterface> Interfaces = Frontend::ISearchEngine::Get().FindAllInterfaces();
				for (const FMetasoundFrontendInterface& Interface : Interfaces)
				{
					if (!ImplementedInterfaceNames.Contains(Interface.Version.Name))
					{
						if (CanAddOrRemoveInterface(Interface.Version))
						{
							FString Name = Interface.Version.Name.ToString();
							AddableInterfaceNames.Add(MakeShared<FString>(MoveTemp(Name)));
						}
					}
				}

				AddableInterfaceNames.Sort([](const TSharedPtr<FString>& A, const TSharedPtr<FString>& B) { return A->Compare(*B) < 0; });
			}
		}
	} // namespace Editor
} // namespace Metasound
#undef LOCTEXT_NAMESPACE