GHOST_Rect.h

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef _H_GHOST_Rect
#define _H_GHOST_Rect

#include "GHOST_Types.h"


class GHOST_Rect {
public:

    GHOST_Rect(GHOST_TInt32 l=0, GHOST_TInt32 t=0, GHOST_TInt32 r=0, GHOST_TInt32 b=0)
        : m_l(l), m_t(t), m_r(r), m_b(b) {}

    GHOST_Rect(const GHOST_Rect& r)
        : m_l(r.m_l), m_t(r.m_t), m_r(r.m_r), m_b(r.m_b) {}
    
    virtual ~GHOST_Rect() {};

    virtual inline GHOST_TInt32 getWidth() const;

    virtual inline GHOST_TInt32 getHeight() const;

    virtual inline void set(GHOST_TInt32 l, GHOST_TInt32 t, GHOST_TInt32 r, GHOST_TInt32 b);

    virtual inline bool isEmpty() const;

    virtual inline bool isValid() const;

    virtual void inset(GHOST_TInt32 i);

    virtual inline void unionRect(const GHOST_Rect& r);

    virtual inline void unionPoint(GHOST_TInt32 x, GHOST_TInt32 y);

    virtual inline void wrapPoint(GHOST_TInt32 &x, GHOST_TInt32 &y, GHOST_TInt32 ofs);

    virtual inline bool isInside(GHOST_TInt32 x, GHOST_TInt32 y) const;

    virtual GHOST_TVisibility getVisibility(GHOST_Rect& r) const;

    virtual void setCenter(GHOST_TInt32 cx, GHOST_TInt32 cy);

    virtual void setCenter(GHOST_TInt32 cx, GHOST_TInt32 cy, GHOST_TInt32 w, GHOST_TInt32 h);

    virtual bool clip(GHOST_Rect& r) const;

    GHOST_TInt32 m_l;
    GHOST_TInt32 m_t;
    GHOST_TInt32 m_r;
    GHOST_TInt32 m_b;

#ifdef WITH_CXX_GUARDEDALLOC
public:
    void *operator new(size_t num_bytes) { return MEM_mallocN(num_bytes, "GHOST:GHOST_Rect"); }
    void operator delete( void *mem ) { MEM_freeN(mem); }
#endif
};


inline GHOST_TInt32 GHOST_Rect::getWidth() const
{
    return m_r - m_l;
}

inline GHOST_TInt32 GHOST_Rect::getHeight() const
{
    return m_b - m_t;
}

inline void GHOST_Rect::set(GHOST_TInt32 l, GHOST_TInt32 t, GHOST_TInt32 r, GHOST_TInt32 b)
{
    m_l = l; m_t = t; m_r = r; m_b = b;
}

inline bool GHOST_Rect::isEmpty() const
{
    return (getWidth() == 0) || (getHeight() == 0);
}

inline bool GHOST_Rect::isValid() const
{
    return (m_l <= m_r) && (m_t <= m_b);
}

inline void GHOST_Rect::unionRect(const GHOST_Rect& r)
{
    if (r.m_l < m_l) m_l = r.m_l;
    if (r.m_r > m_r) m_r = r.m_r;
    if (r.m_t < m_t) m_t = r.m_t;
    if (r.m_b > m_b) m_b = r.m_b;
}

inline void GHOST_Rect::unionPoint(GHOST_TInt32 x, GHOST_TInt32 y)
{
    if (x < m_l) m_l = x;
    if (x > m_r) m_r = x;
    if (y < m_t) m_t = y;
    if (y > m_b) m_b = y;
}
#include <stdio.h>
inline void GHOST_Rect::wrapPoint(GHOST_TInt32 &x, GHOST_TInt32 &y, GHOST_TInt32 ofs)
{
    GHOST_TInt32 w= getWidth();
    GHOST_TInt32 h= getHeight();

    /* highly unlikely but avoid eternal loop */
    if(w-ofs*2 <= 0 || h-ofs*2 <= 0)
        return;
    while(x-ofs < m_l)      x+= w-(ofs*2);
    while(y-ofs < m_t)      y+= h-(ofs*2);
    while(x+ofs > m_r)      x-= w-(ofs*2);
    while(y+ofs > m_b)      y-= h-(ofs*2);
}

inline bool GHOST_Rect::isInside(GHOST_TInt32 x, GHOST_TInt32 y) const
{
    return (x >= m_l) && (x <= m_r) && (y >= m_t) && (y <= m_b);
}

#endif // _H_GHOST_Rect