/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

#ifndef INCLUDED_TILEBUFFER_HXX
#define INCLUDED_TILEBUFFER_HXX

#include <gdk/gdkkeysyms.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <map>

#define LOK_USE_UNSTABLE_API
#include <LibreOfficeKit/LibreOfficeKit.h>
#include <LibreOfficeKit/LibreOfficeKitEnums.h>
#include <LibreOfficeKit/LibreOfficeKitGtk.h>

/*
  This class represents a single tile in the tile buffer.
  TODO: Extend it to support features like double buffering
*/
class Tile
{
 public:
 Tile() : valid(0) {}
    ~Tile() {
    }

    GdkPixbuf* tile_get_buffer();
    void tile_release();
    void tile_set_pixbuf(GdkPixbuf*);
    bool valid;
 private:
    GdkPixbuf *m_pBuffer;
};

/*
  TileBuffer is the buffer caching all the recently rendered tiles.
  The buffer is set to invalid when zoom factor changes.
*/
class TileBuffer
{
 public:
 TileBuffer(LibreOfficeKitDocument *document,
            int tileSize,
            int rows,
            int columns)
     : m_pLOKDocument(document)
        , m_nTileSize(tileSize)
        , m_fZoomFactor(1)
        , m_nWidth(columns)
        , m_nHeight(rows)
    {  }

    ~TileBuffer() {}

    void tile_buffer_set_zoom(float zoomFactor, int rows, int columns);
    Tile& tile_buffer_get_tile(int x, int y);
    void tile_buffer_update();
    void tile_buffer_reset_all_tiles();
    void tile_buffer_set_invalid(int x, int y);
 private:
    LibreOfficeKitDocument *m_pLOKDocument;
    int m_nTileSize;
    float m_fZoomFactor;
    std::map<int, Tile> m_mTiles;
    //TODO: Also set width and height when document size changes
    int m_nWidth;
    int m_nHeight;
};

#endif // INCLUDED_TILEBUFFER_HXX