/*---------------------------------------------------------------------------*
  Project:  Horizon
  File:     scrollBuffer.h

  Copyright (C)2009 Nintendo Co., Ltd.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Rev$
 *---------------------------------------------------------------------------*/

#ifndef SCROLL_BUFFER_H_
#define SCROLL_BUFFER_H_

#include "demo.h"
class ScrollBuffer
{
private:
    enum
    {
        MAX_BUFFER_LINE=128,
        MAX_BUFFER_CHARS=80,
        MAX_DISPLAY_LINES=20,
        FONT_SIZE=12
    };
    // 表示文字のバッファ (リングバッファ)
    static char s_buffers[MAX_BUFFER_LINE][MAX_BUFFER_CHARS];
    int m_head;
    int m_tail;
    int m_currentView;

    demo::RenderSystemDrawing *m_render;

    char *GetFormattedString(const char *fmt, va_list arg);

public:
    ScrollBuffer() : 
        m_head(0), m_tail(0), m_currentView(0)
    {}
    void Initialize(demo::RenderSystemDrawing *render)
    {
        m_render=render;
    }

    ScrollBuffer *Update(); // キー入力を参照して、スクロールする
    ScrollBuffer *AppendText(const char *fmt, ...); // 文字列を追加する
    ScrollBuffer *ReplaceText(const char *fmt, ...); // 最新の文字列を置換する
    void Render(); // レンダリング
};

#endif // SCROLL_BUFFER_H