/////////////////////////////////////////////////////////////////////////////
// Name:        wx/gtk/region.h
// Purpose:
// Author:      Robert Roebling
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_GTK_REGION_H_
#define _WX_GTK_REGION_H_

#ifdef __WXGTK3__
typedef struct _cairo_region cairo_region_t;
#endif

// ----------------------------------------------------------------------------
// wxRegion
// ----------------------------------------------------------------------------

class WXDLLIMPEXP_CORE wxRegion : public wxRegionBase
{
public:
    wxRegion() = default;

    wxRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
    {
        InitRect(x, y, w, h);
    }

    wxRegion( const wxPoint& topLeft, const wxPoint& bottomRight )
    {
        InitRect(topLeft.x, topLeft.y,
                 bottomRight.x - topLeft.x, bottomRight.y - topLeft.y);
    }

    wxRegion( const wxRect& rect )
    {
        InitRect(rect.x, rect.y, rect.width, rect.height);
    }

    wxRegion( size_t n, const wxPoint *points,
              wxPolygonFillMode fillStyle = wxODDEVEN_RULE );

#if wxUSE_IMAGE
    wxRegion( const wxBitmap& bmp)
    {
        Union(bmp);
    }
    wxRegion( const wxBitmap& bmp,
              const wxColour& transColour, int tolerance = 0)
    {
        Union(bmp, transColour, tolerance);
    }
#endif // wxUSE_IMAGE

    virtual ~wxRegion();

    // wxRegionBase methods
    virtual void Clear() override;
    virtual bool IsEmpty() const override;

#ifdef __WXGTK3__
    cairo_region_t* GetRegion() const;
#else
    wxRegion(const GdkRegion* region);
    GdkRegion *GetRegion() const;
#endif

protected:
    virtual wxGDIRefData *CreateGDIRefData() const override;
    wxNODISCARD virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const override;

    // wxRegionBase pure virtuals
    virtual bool DoIsEqual(const wxRegion& region) const override;
    virtual bool DoGetBox(wxCoord& x, wxCoord& y, wxCoord& w, wxCoord& h) const override;
    virtual wxRegionContain DoContainsPoint(wxCoord x, wxCoord y) const override;
    virtual wxRegionContain DoContainsRect(const wxRect& rect) const override;

    virtual bool DoOffset(wxCoord x, wxCoord y) override;
    virtual bool DoUnionWithRect(const wxRect& rect) override;
    virtual bool DoUnionWithRegion(const wxRegion& region) override;
    virtual bool DoIntersect(const wxRegion& region) override;
    virtual bool DoSubtract(const wxRegion& region) override;
    virtual bool DoXor(const wxRegion& region) override;

    // common part of ctors for a rectangle region
    void InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h);

private:
    wxDECLARE_DYNAMIC_CLASS(wxRegion);
};

// ----------------------------------------------------------------------------
// wxRegionIterator: decomposes a region into rectangles
// ----------------------------------------------------------------------------

class WXDLLIMPEXP_CORE wxRegionIterator: public wxObject
{
public:
    wxRegionIterator();
    wxRegionIterator(const wxRegion& region);
    wxRegionIterator(const wxRegionIterator& ri) : wxObject(ri) { Init(); *this = ri; }
    ~wxRegionIterator();

    wxRegionIterator& operator=(const wxRegionIterator& ri);

    void Reset() { m_current = 0u; }
    void Reset(const wxRegion& region);

    bool HaveRects() const;
    operator bool () const { return HaveRects(); }

    wxRegionIterator& operator ++ ();
    wxRegionIterator operator ++ (int);

    wxCoord GetX() const;
    wxCoord GetY() const;
    wxCoord GetW() const;
    wxCoord GetWidth() const { return GetW(); }
    wxCoord GetH() const;
    wxCoord GetHeight() const { return GetH(); }
    wxRect GetRect() const;

private:
    void Init();
    void CreateRects( const wxRegion& r );

    wxRegion m_region;
    wxRect *m_rects;
    int m_numRects;
    int m_current;

    wxDECLARE_DYNAMIC_CLASS(wxRegionIterator);
};


#endif
        // _WX_GTK_REGION_H_
