WebCore/IntPoint.h

   1 /*
   2  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef IntPoint_h
  27 #define IntPoint_h
  28
  29 #include "IntSize.h"
  30 #include <wtf/Platform.h>
  31
  32 #if PLATFORM(CG)
  33 typedef struct CGPoint CGPoint;
  34 #endif
  35
  36
  37 #if PLATFORM(WIN)
  38 typedef struct tagPOINT POINT;
  39 typedef struct tagPOINTS POINTS;
  40 #elif PLATFORM(QT)
  41 QT_BEGIN_NAMESPACE
  42 class QPoint;
  43 QT_END_NAMESPACE
  44 #elif PLATFORM(GTK)
  45 typedef struct _GdkPoint GdkPoint;
  46 #endif
  47 #if PLATFORM(SYMBIAN)
  48 class TPoint;
  49 #endif
  50
  51 #if PLATFORM(WX)
  52 class wxPoint;
  53 #endif
  54
  55 #if PLATFORM(SKIA)
  56 struct SkPoint;
  57 struct SkIPoint;
  58 #endif
  59
  60 namespace WebCore {
  61
  62 class IntPoint {
  63 public:
  64     IntPoint() : m_x(0), m_y(0) { }
  65     IntPoint(int x, int y) : m_x(x), m_y(y) { }
  66
  67     int x() const { return m_x; }
  68     int y() const { return m_y; }
  69
  70     void setX(int x) { m_x = x; }
  71     void setY(int y) { m_y = y; }
  72
  73     void move(int dx, int dy) { m_x += dx; m_y += dy; }
  74
  75     IntPoint expandedTo(const IntPoint& other) const
  76     {
  77         return IntPoint(m_x > other.m_x ? m_x : other.m_x,
  78             m_y > other.m_y ? m_y : other.m_y);
  79     }
  80
  81     IntPoint shrunkTo(const IntPoint& other) const
  82     {
  83         return IntPoint(m_x < other.m_x ? m_x : other.m_x,
  84             m_y < other.m_y ? m_y : other.m_y);
  85     }
  86
  87     void clampNegativeToZero()
  88     {
  89         *this = expandedTo(IntPoint());
  90     }
  91
  92 #if PLATFORM(CG)
  93     explicit IntPoint(const CGPoint&); // don't do this implicitly since it's lossy
  94     operator CGPoint() const;
  95 #endif
  96
  97
  98 #if PLATFORM(WIN)
  99     IntPoint(const POINT&);
 100     operator POINT() const;
 101     IntPoint(const POINTS&);
 102     operator POINTS() const;
 103 #elif PLATFORM(QT)
 104     IntPoint(const QPoint&);
 105     operator QPoint() const;
 106 #elif PLATFORM(GTK)
 107     IntPoint(const GdkPoint&);
 108     operator GdkPoint() const;
 109 #endif
 110 #if PLATFORM(SYMBIAN)
 111     IntPoint(const TPoint&);
 112     operator TPoint() const;
 113 #endif
 114
 115 #if PLATFORM(WX)
 116     IntPoint(const wxPoint&);
 117     operator wxPoint() const;
 118 #endif
 119
 120 #if PLATFORM(SKIA)
 121     IntPoint(const SkIPoint&);
 122     operator SkIPoint() const;
 123     operator SkPoint() const;
 124 #endif
 125
 126 private:
 127     int m_x, m_y;
 128 };
 129
 130 inline IntPoint& operator+=(IntPoint& a, const IntSize& b)
 131 {
 132     a.move(b.width(), b.height());
 133     return a;
 134 }
 135
 136 inline IntPoint& operator-=(IntPoint& a, const IntSize& b)
 137 {
 138     a.move(-b.width(), -b.height());
 139     return a;
 140 }
 141
 142 inline IntPoint operator+(const IntPoint& a, const IntSize& b)
 143 {
 144     return IntPoint(a.x() + b.width(), a.y() + b.height());
 145 }
 146
 147 inline IntSize operator-(const IntPoint& a, const IntPoint& b)
 148 {
 149     return IntSize(a.x() - b.x(), a.y() - b.y());
 150 }
 151
 152 inline IntPoint operator-(const IntPoint& a, const IntSize& b)
 153 {
 154     return IntPoint(a.x() - b.width(), a.y() - b.height());
 155 }
 156
 157 inline bool operator==(const IntPoint& a, const IntPoint& b)
 158 {
 159     return a.x() == b.x() && a.y() == b.y();
 160 }
 161
 162 inline bool operator!=(const IntPoint& a, const IntPoint& b)
 163 {
 164     return a.x() != b.x() || a.y() != b.y();
 165 }
 166
 167 } // namespace WebCore
 168
 169 #endif // IntPoint_h