OpenRCT2/src/openrct2-ui/TextComposition.h

#pragma region Copyright (c) 2014-2017 OpenRCT2 Developers
/*****************************************************************************
* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
*
* OpenRCT2 is the work of many authors, a full list can be found in contributors.md
* For more information, visit https://github.com/OpenRCT2/OpenRCT2
*
* OpenRCT2 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* A full copy of the GNU General Public License can be found in licence.txt
*****************************************************************************/
#pragma endregion

#pragma once

#include <openrct2/common.h>
#include <openrct2/Context.h>
#include <openrct2/ui/UiContext.h>

union SDL_Event;

namespace OpenRCT2::Ui
{
    /**
     * Represents a
     */
    class TextComposition
    {
    private:
        TextInputSession _session = {};

        bool    _imeActive = false;
        sint32  _imeStart = 0;
        sint32  _imeLength = 0;
        utf8    _imeBuffer[32] = {};

    public:
        bool IsActive();
        TextInputSession * Start(utf8 * buffer, size_t bufferSize);
        void Stop();
        void HandleMessage(const SDL_Event * e);

    private:
        void CursorHome();
        void CursorEnd();
        void CursorLeft();
        void CursorRight();
        void Insert(const utf8 * text);
        void InsertCodepoint(codepoint_t codepoint);
        void Clear();
        void Delete();
        void RecalculateLength();
    };
}