/*
 * SPDX-FileCopyrightText: 2014 Hugo Pereira Da Costa <hugo.pereira@free.fr>
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#pragma once

#include <QPixmap>
#include <QRect>
#include <QVector>

//* handles proper scaling of pixmap to match widget rect.
/**
tilesets are collections of stretchable pixmaps corresponding to a given widget corners, sides, and center.
corner pixmaps are never stretched. center pixmaps are
*/
namespace Breeze
{
class TileSet
{
public:
    /**
    Create a TileSet from a pixmap. The size of the bottom/right chunks is
    whatever is left over from the other chunks, whose size is specified
    in the required parameters.

    @param w1 width of the left chunks
    @param h1 height of the top chunks
    @param w2 width of the not-left-or-right chunks
    @param h2 height of the not-top-or-bottom chunks
    */
    TileSet(const QPixmap &, int w1, int h1, int w2, int h2);

    //* empty constructor
    TileSet();

    //* destructor
    virtual ~TileSet()
    {
    }

    /**
    Flags specifying what sides to draw in ::render. Corners are drawn when
    the sides forming that corner are drawn, e.g. Top|Left draws the
    top-center, center-left, and top-left chunks. The center-center chunk is
    only drawn when Center is requested.
    */
    enum Tile {
        Top = 0x1,
        Left = 0x2,
        Bottom = 0x4,
        Right = 0x8,
        Center = 0x10,
        TopLeft = Top | Left,
        TopRight = Top | Right,
        BottomLeft = Bottom | Left,
        BottomRight = Bottom | Right,
        Ring = Top | Left | Bottom | Right,
        Horizontal = Left | Right | Center,
        Vertical = Top | Bottom | Center,
        Full = Ring | Center,
    };
    Q_DECLARE_FLAGS(Tiles, Tile)

    /**
    Fills the specified rect with tiled chunks. Corners are never tiled,
    edges are tiled in one direction, and the center chunk is tiled in both
    directions. Partial tiles are used as needed so that the entire rect is
    perfectly filled. Filling is performed as if all chunks are being drawn.
    */
    void render(const QRect &, QPainter *, Tiles = Ring) const;

    //* return size associated to this tileset
    QSize size() const
    {
        return QSize(_w1 + _w3, _h1 + _h3);
    }

    //* is valid
    bool isValid() const
    {
        return _pixmaps.size() == 9;
    }

    //* returns pixmap for given index
    QPixmap pixmap(int index) const
    {
        return _pixmaps[index];
    }

protected:
    //* shortcut to pixmap list
    using PixmapList = QVector<QPixmap>;

    //* initialize pixmap
    void initPixmap(PixmapList &, const QPixmap &, int w, int h, const QRect &);

private:
    //* pixmap arry
    PixmapList _pixmaps;

    // dimensions
    int _w1;
    int _h1;
    int _w3;
    int _h3;
};

}

Q_DECLARE_OPERATORS_FOR_FLAGS(Breeze::TileSet::Tiles)
