FeatherMC/src/logging/Logger.cpp

#include "Logger.h"

#include <cstdio>
#include <cstdarg>

// Instead of defining FMT_HEADER_ONLY or building fmtlib
// we can just include all implementation code in Logger.cpp
#include "fmt/src/format.cc"

namespace Feather::Log
{
    namespace Channels
    {
        ChannelID General = Logger::Instance().RegisterChannel("General");
    }

    ChannelID Logger::RegisterChannel(const char* name)
    {
        size_t id = m_channels.size();
        m_channels.emplace_back(name);
        return id;
    }

    Logger& Logger::Instance()
    {
        static std::unique_ptr<Logger> s_logger = nullptr;
        if (s_logger == nullptr)
            s_logger = std::make_unique<Logger>();

        return *s_logger;
    }
}

#ifdef _WIN32

#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif

#include <windows.h>
#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x0004

#endif

namespace
{
    class LoggingManager
    {
    public:
        LoggingManager()
        {
#ifdef _WIN32
            HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
            if (handle != INVALID_HANDLE_VALUE)
            {
                DWORD mode = 0;
                if (GetConsoleMode(handle, &mode))
                {
                    // To enable ANSI escape sequences on Windows 10 we need to set this flag
                    mode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
                    SetConsoleMode(handle, mode);
                }
            }
#endif
        }
    };

    static LoggingManager s_loggingManager;
}