WebCore/IntSize.h

   1 /*
   2  * Copyright (C) 2003, 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 IntSize_h
  27 #define IntSize_h
  28
  29 #include <wtf/Platform.h>
  30
  31 #include <CoreGraphics/CoreGraphics.h>
  32
  33 #if PLATFORM(CG)
  34 typedef struct CGSize CGSize;
  35 #endif
  36
  37
  38 #ifndef NSSize
  39 #define NSSize CGSize
  40 #endif
  41
  42
  43 #if PLATFORM(WIN)
  44 typedef struct tagSIZE SIZE;
  45 #elif PLATFORM(QT)
  46 #include <qglobal.h>
  47 QT_BEGIN_NAMESPACE
  48 class QSize;
  49 QT_END_NAMESPACE
  50 #endif
  51 #if PLATFORM(SYMBIAN)
  52 class TSize;
  53 #endif
  54
  55 namespace WebCore {
  56
  57 class IntSize {
  58 public:
  59     IntSize() : m_width(0), m_height(0) { }
  60     IntSize(int width, int height) : m_width(width), m_height(height) { }
  61
  62     int width() const { return m_width; }
  63     int height() const { return m_height; }
  64
  65     void setWidth(int width) { m_width = width; }
  66     void setHeight(int height) { m_height = height; }
  67
  68     bool isEmpty() const { return m_width <= 0 || m_height <= 0; }
  69
  70     void expand(int width, int height)
  71     {
  72         m_width += width;
  73         m_height += height;
  74     }
  75
  76     IntSize expandedTo(const IntSize& other) const
  77     {
  78         return IntSize(m_width > other.m_width ? m_width : other.m_width,
  79             m_height > other.m_height ? m_height : other.m_height);
  80     }
  81
  82     IntSize shrunkTo(const IntSize& other) const
  83     {
  84         return IntSize(m_width < other.m_width ? m_width : other.m_width,
  85             m_height < other.m_height ? m_height : other.m_height);
  86     }
  87
  88     void clampNegativeToZero()
  89     {
  90         *this = expandedTo(IntSize());
  91     }
  92
  93 #if PLATFORM(CG)
  94     explicit IntSize(const CGSize&); // don't do this implicitly since it's lossy
  95     operator CGSize() const;
  96 #endif
  97
  98
  99 #if PLATFORM(WIN)
 100     IntSize(const SIZE&);
 101     operator SIZE() const;
 102 #endif
 103
 104 #if PLATFORM(QT)
 105     IntSize(const QSize&);
 106     operator QSize() const;
 107 #endif
 108 #if PLATFORM(SYMBIAN)
 109     IntSize(const TSize&);
 110     operator TSize() const;
 111 #endif
 112
 113
 114 private:
 115     int m_width, m_height;
 116 };
 117
 118 inline IntSize& operator+=(IntSize& a, const IntSize& b)
 119 {
 120     a.setWidth(a.width() + b.width());
 121     a.setHeight(a.height() + b.height());
 122     return a;
 123 }
 124
 125 inline IntSize& operator-=(IntSize& a, const IntSize& b)
 126 {
 127     a.setWidth(a.width() - b.width());
 128     a.setHeight(a.height() - b.height());
 129     return a;
 130 }
 131
 132 inline IntSize operator+(const IntSize& a, const IntSize& b)
 133 {
 134     return IntSize(a.width() + b.width(), a.height() + b.height());
 135 }
 136
 137 inline IntSize operator-(const IntSize& a, const IntSize& b)
 138 {
 139     return IntSize(a.width() - b.width(), a.height() - b.height());
 140 }
 141
 142 inline IntSize operator-(const IntSize& size)
 143 {
 144     return IntSize(-size.width(), -size.height());
 145 }
 146
 147 inline bool operator==(const IntSize& a, const IntSize& b)
 148 {
 149     return a.width() == b.width() && a.height() == b.height();
 150 }
 151
 152 inline bool operator!=(const IntSize& a, const IntSize& b)
 153 {
 154     return a.width() != b.width() || a.height() != b.height();
 155 }
 156
 157 } // namespace WebCore
 158
 159 #endif // IntSize_h