Carla/source/utils/CarlaExternalUI.hpp

// SPDX-FileCopyrightText: 2011-2025 Filipe Coelho <falktx@falktx.com>
// SPDX-License-Identifier: GPL-2.0-or-later

#ifndef CARLA_EXTERNAL_UI_HPP_INCLUDED
#define CARLA_EXTERNAL_UI_HPP_INCLUDED

#include "CarlaPipeUtils.hpp"

#include "distrho/extra/String.hpp"

// -----------------------------------------------------------------------

class CarlaExternalUI : public CarlaPipeServer
{
public:
    enum UiState {
        UiNone = 0,
        UiHide,
        UiShow,
        UiCrashed
    };

    CarlaExternalUI() noexcept
        : fFilename(),
          fArg1(),
          fArg2(),
          fUiState(UiNone) {}

    ~CarlaExternalUI() /*noexcept*/ override
    {
        CARLA_SAFE_ASSERT_INT(fUiState == UiNone, fUiState);
    }

    UiState getAndResetUiState() noexcept
    {
        const UiState uiState(fUiState);
        fUiState = UiNone;
        return uiState;
    }

    void setData(const char* const filename, const char* const arg1, const char* const arg2) noexcept
    {
        fFilename = filename;
        fArg1     = arg1;
        fArg2     = arg2;
    }

    void setData(const char* const filename, const double sampleRate, const char* const uiTitle) noexcept
    {
        fFilename = filename;
        fArg1     = String(sampleRate);
        fArg2     = uiTitle;
    }

    bool startPipeServer(const bool show = true) noexcept
    {
        if (CarlaPipeServer::startPipeServer(fFilename, fArg1, fArg2))
        {
            if (show)
                writeShowMessage();
            return true;
        }

        return false;
    }

protected:
    // returns true if msg was handled
    bool msgReceived(const char* const msg) noexcept override
    {
        if (std::strcmp(msg, "exiting") == 0)
        {
            closePipeServer();
            fUiState = UiHide;
            return true;
        }

        return false;
    }

private:
    String fFilename;
    String fArg1;
    String fArg2;
    UiState fUiState;

    CARLA_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(CarlaExternalUI)
};

// -----------------------------------------------------------------------

#endif // CARLA_EXTERNAL_UI_HPP_INCLUDED