写出ue5的c++代码 以增加资源查看的上下文菜单

以下是UE5的C++代码示例，用于增加资源查看的上下文菜单：

#include "CoreMinimal.h"
#include "LevelEditor.h"
#include "Editor/UnrealEd/Public/Editor.h"
#include "Editor/UnrealEd/Public/EditorStyleSet.h"
#include "Editor/UnrealEd/Public/LevelEditorContextMenuContext.h"
#include "Editor/UnrealEd/Public/Toolkits/AssetEditorToolkit.h"
#include "Editor/UnrealEd/Public/Toolkits/ToolkitManager.h"
#include "Editor/UnrealEd/Public/Toolkits/AssetEditorManager.h"

void OnContextMenuOpened(const TSharedRef<FUICommandList> CommandList, TArray<FLevelEditorContextMenuContext>& Contexts)
{
    for (const FLevelEditorContextMenuContext& Context : Contexts)
    {
        if (Context.AssetName.IsEmpty())
        {
            continue;
        }

        const FString CommandName = FString::Printf(TEXT("OpenAssetInViewer_%s"), *Context.AssetName);
        FUIAction OpenAssetInViewerAction(FExecuteAction::CreateLambda([=]()
        {
            UAssetEditorSubsystem* AssetEditorSubsystem = GEditor->GetEditorSubsystem<UAssetEditorSubsystem>();
            if (AssetEditorSubsystem)
            {
                FAssetEditorToolkit* AssetEditorToolkit = AssetEditorSubsystem->FindEditorForAsset(Context.Object);
                if (!AssetEditorToolkit)
                {
                    const FAssetEditorManager& AssetEditorManager = FAssetEditorManager::Get();
                    FAssetEditorToolkitCreationOptions Options;
                    Options.HostMode = EToolkitMode::Standalone;
                    Options.RequestBringToFront = true;
                    AssetEditorToolkit = AssetEditorManager.OpenEditorForAsset(Context.Object, Options);
                }

                if (AssetEditorToolkit)
                {
                    AssetEditorToolkit->BringToFront();
                }
            }
        }));
        const FText CommandLabel = FText::Format(NSLOCTEXT("OpenAssetInViewerCommands", "OpenAssetInViewerCommand_Label", "Open {0} in Viewer"), FText::FromString(Context.AssetName));
        const FText CommandDescription = FText::Format(NSLOCTEXT("OpenAssetInViewerCommands", "OpenAssetInViewerCommand_Description", "Opens {0} in the asset viewer"), FText::FromString(Context.AssetName));
        CommandList->MapAction(FUICommandInfoDecl(CommandName, CommandLabel, CommandDescription, EUserInterfaceActionType::Button, FInputChord()), OpenAssetInViewerAction);
    }
}

void RegisterAssetViewerCommands()
{
    FLevelEditorModule& LevelEditorModule = FModuleManager::GetModuleChecked<FLevelEditorModule>("LevelEditor");
    LevelEditorModule.OnContextMenuOpened().AddStatic(&OnContextMenuOpened);
}

#undef LOCTEXT_NAMESPACE

IMPLEMENT_MODULE(FDefaultModuleImpl, AssetViewerCommands)

这段代码监听上下文菜单打开事件，为每个选中的资源添加一个“在查看器中打开”的菜单项。如果资源已经在查看器中打开，则激活该查看器并将其置于前台。 如果资源尚未在查看器中打开，则打开一个新的查看器并将其置于前台。