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IntSize.h

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00001 /*
00002  * Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
00003  *
00004  * Redistribution and use in source and binary forms, with or without
00005  * modification, are permitted provided that the following conditions
00006  * are met:
00007  * 1. Redistributions of source code must retain the above copyright
00008  *    notice, this list of conditions and the following disclaimer.
00009  * 2. Redistributions in binary form must reproduce the above copyright
00010  *    notice, this list of conditions and the following disclaimer in the
00011  *    documentation and/or other materials provided with the distribution.
00012  *
00013  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
00014  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00015  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
00016  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
00017  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00018  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00019  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00020  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
00021  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00022  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00023  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
00024  */
00025 
00026 #ifndef IntSize_h
00027 #define IntSize_h
00028 
00029 #include <wtf/Platform.h>
00030 
00031 #if PLATFORM(CG)
00032 typedef struct CGSize CGSize;
00033 #endif
00034 
00035 #if PLATFORM(MAC)
00036 #ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES
00037 typedef struct CGSize NSSize;
00038 #else
00039 typedef struct _NSSize NSSize;
00040 #endif
00041 #endif
00042 
00043 #if PLATFORM(WIN)
00044 typedef struct tagSIZE SIZE;
00045 #elif PLATFORM(QT)
00046 #include <qglobal.h>
00047 QT_BEGIN_NAMESPACE
00048 class QSize;
00049 QT_END_NAMESPACE
00050 #endif
00051 #if PLATFORM(SYMBIAN)
00052 class TSize;
00053 #endif
00054 
00055 namespace WebCore {
00056 
00057 class IntSize {
00058 public:
00059     IntSize() : m_width(0), m_height(0) { }
00060     IntSize(int width, int height) : m_width(width), m_height(height) { }
00061     
00062     int width() const { return m_width; }
00063     int height() const { return m_height; }
00064 
00065     void setWidth(int width) { m_width = width; }
00066     void setHeight(int height) { m_height = height; }
00067 
00068     bool isEmpty() const { return m_width <= 0 || m_height <= 0; }
00069 
00070     IntSize expandedTo(const IntSize& other) const
00071     {
00072         return IntSize(m_width > other.m_width ? m_width : other.m_width,
00073             m_height > other.m_height ? m_height : other.m_height);
00074     }
00075 
00076     IntSize shrunkTo(const IntSize& other) const
00077     {
00078         return IntSize(m_width < other.m_width ? m_width : other.m_width,
00079             m_height < other.m_height ? m_height : other.m_height);
00080     }
00081 
00082     void clampNegativeToZero()
00083     {
00084         *this = expandedTo(IntSize());
00085     }
00086 
00087 #if PLATFORM(CG)
00088     explicit IntSize(const CGSize&); // don't do this implicitly since it's lossy
00089     operator CGSize() const;
00090 #endif
00091 
00092 #if PLATFORM(MAC) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
00093     explicit IntSize(const NSSize &); // don't do this implicitly since it's lossy
00094     operator NSSize() const;
00095 #endif
00096 
00097 #if PLATFORM(WIN)
00098     IntSize(const SIZE&);
00099     operator SIZE() const;
00100 #endif
00101 
00102 #if PLATFORM(QT)
00103     IntSize(const QSize&);
00104     operator QSize() const;
00105 #endif
00106 #if PLATFORM(SYMBIAN)
00107     IntSize(const TSize&);
00108     operator TSize() const;
00109 #endif
00110 
00111 
00112 private:
00113     int m_width, m_height;
00114 };
00115 
00116 inline IntSize& operator+=(IntSize& a, const IntSize& b)
00117 {
00118     a.setWidth(a.width() + b.width());
00119     a.setHeight(a.height() + b.height());
00120     return a;
00121 }
00122 
00123 inline IntSize& operator-=(IntSize& a, const IntSize& b)
00124 {
00125     a.setWidth(a.width() - b.width());
00126     a.setHeight(a.height() - b.height());
00127     return a;
00128 }
00129 
00130 inline IntSize operator+(const IntSize& a, const IntSize& b)
00131 {
00132     return IntSize(a.width() + b.width(), a.height() + b.height());
00133 }
00134 
00135 inline IntSize operator-(const IntSize& a, const IntSize& b)
00136 {
00137     return IntSize(a.width() - b.width(), a.height() - b.height());
00138 }
00139 
00140 inline IntSize operator-(const IntSize& size)
00141 {
00142     return IntSize(-size.width(), -size.height());
00143 }
00144 
00145 inline bool operator==(const IntSize& a, const IntSize& b)
00146 {
00147     return a.width() == b.width() && a.height() == b.height();
00148 }
00149 
00150 inline bool operator!=(const IntSize& a, const IntSize& b)
00151 {
00152     return a.width() != b.width() || a.height() != b.height();
00153 }
00154 
00155 } // namespace WebCore
00156 
00157 #endif // IntSize_h

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