HierarchicalLogArchive.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/UnrealString.h"
#include "CoreMinimal.h"
#include "HAL/Platform.h"
#include "Misc/AssertionMacros.h"
#include "Serialization/ArchiveProxy.h"
 
class FArchive;
 
struct FHierarchicalLogArchive : private FArchiveProxy
{
public:
    FHierarchicalLogArchive(FArchive& InInnerArchive);
 
    struct FIndentScope
    {
        FIndentScope(FHierarchicalLogArchive* InAr) : Ar(InAr) { Ar->Indentation++; }
        ~FIndentScope() { check(Ar->Indentation); Ar->Indentation--; }
        FHierarchicalLogArchive* Ar;
    };
 
    void Print(const TCHAR* InLine)
    {
        WriteLine(InLine, false);
    }
 
    UE_NODISCARD FIndentScope PrintIndent(const TCHAR* InLine)
    {
        WriteLine(InLine, true);
        return FIndentScope(this);
    }
 
    template <typename FmtType, typename... Types>
    void Printf(const FmtType& Fmt, Types... Args)
    {
        WriteLine(FString::Printf(Fmt, Args...), false);
    }
 
    template <typename FmtType, typename... Types>
    UE_NODISCARD FIndentScope PrintfIndent(const FmtType& Fmt, Types... Args)
    {
        WriteLine(FString::Printf(Fmt, Args...), true);
        return FIndentScope(this);
    }
 
private:
    void WriteLine(const FString& InLine, bool bIndent = false);
 
    int32 Indentation;
};
 
#if NO_LOGGING
#define UE_SCOPED_INDENT_LOG_ARCHIVE(Code)
#else
#define UE_SCOPED_INDENT_LOG_ARCHIVE(Code)
    FHierarchicalLogArchive::FIndentScope BODY_MACRO_COMBINE(Scoped,Indent,_,__LINE__) = Code
#endif