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#if USE(CG)
30typedef struct CGSize CGSize;
31#endif
32
33#if PLATFORM(MAC)
34#ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES
35typedef struct CGSize NSSize;
36#else
37typedef struct _NSSize NSSize;
38#endif
39#endif
40
41#if PLATFORM(WIN)
42typedef struct tagSIZE SIZE;
43#elif PLATFORM(QT)
44#include <qglobal.h>
45QT_BEGIN_NAMESPACE
46class QSize;
47QT_END_NAMESPACE
48#elif PLATFORM(BLACKBERRY)
49namespace BlackBerry {
50namespace Platform {
51class IntSize;
52}
53}
54#endif
55
56namespace WebCore {
57
58class IntSize {
59public:
60    IntSize() : m_width(0), m_height(0) { }
61    IntSize(int width, int height) : m_width(width), m_height(height) { }
62
63    int width() const { return m_width; }
64    int height() const { return m_height; }
65
66    void setWidth(int width) { m_width = width; }
67    void setHeight(int height) { m_height = height; }
68
69    bool isEmpty() const { return m_width <= 0 || m_height <= 0; }
70    bool isZero() const { return !m_width && !m_height; }
71
72    float aspectRatio() const { return static_cast<float>(m_width) / static_cast<float>(m_height); }
73
74    void expand(int width, int height)
75    {
76        m_width += width;
77        m_height += height;
78    }
79
80    void scale(float widthScale, float heightScale)
81    {
82        m_width = static_cast<int>(static_cast<float>(m_width) * widthScale);
83        m_height = static_cast<int>(static_cast<float>(m_height) * heightScale);
84    }
85
86    void scale(float scale)
87    {
88        this->scale(scale, scale);
89    }
90
91    IntSize expandedTo(const IntSize& other) const
92    {
93        return IntSize(m_width > other.m_width ? m_width : other.m_width,
94            m_height > other.m_height ? m_height : other.m_height);
95    }
96
97    IntSize shrunkTo(const IntSize& other) const
98    {
99        return IntSize(m_width < other.m_width ? m_width : other.m_width,
100            m_height < other.m_height ? m_height : other.m_height);
101    }
102
103    void clampNegativeToZero()
104    {
105        *this = expandedTo(IntSize());
106    }
107
108    void clampToMinimumSize(const IntSize& minimumSize)
109    {
110        if (m_width < minimumSize.width())
111            m_width = minimumSize.width();
112        if (m_height < minimumSize.height())
113            m_height = minimumSize.height();
114    }
115
116    int area() const
117    {
118        return m_width * m_height;
119    }
120
121    int diagonalLengthSquared() const
122    {
123        return m_width * m_width + m_height * m_height;
124    }
125
126    IntSize transposedSize() const
127    {
128        return IntSize(m_height, m_width);
129    }
130
131#if USE(CG)
132    explicit IntSize(const CGSize&); // don't do this implicitly since it's lossy
133    operator CGSize() const;
134#endif
135
136#if PLATFORM(MAC) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
137    explicit IntSize(const NSSize &); // don't do this implicitly since it's lossy
138    operator NSSize() const;
139#endif
140
141#if PLATFORM(WIN)
142    IntSize(const SIZE&);
143    operator SIZE() const;
144#endif
145
146#if PLATFORM(QT)
147    IntSize(const QSize&);
148    operator QSize() const;
149#endif
150
151#if PLATFORM(BLACKBERRY)
152    IntSize(const BlackBerry::Platform::IntSize&);
153    operator BlackBerry::Platform::IntSize() const;
154#endif
155
156private:
157    int m_width, m_height;
158};
159
160inline IntSize& operator+=(IntSize& a, const IntSize& b)
161{
162    a.setWidth(a.width() + b.width());
163    a.setHeight(a.height() + b.height());
164    return a;
165}
166
167inline IntSize& operator-=(IntSize& a, const IntSize& b)
168{
169    a.setWidth(a.width() - b.width());
170    a.setHeight(a.height() - b.height());
171    return a;
172}
173
174inline IntSize operator+(const IntSize& a, const IntSize& b)
175{
176    return IntSize(a.width() + b.width(), a.height() + b.height());
177}
178
179inline IntSize operator-(const IntSize& a, const IntSize& b)
180{
181    return IntSize(a.width() - b.width(), a.height() - b.height());
182}
183
184inline IntSize operator-(const IntSize& size)
185{
186    return IntSize(-size.width(), -size.height());
187}
188
189inline bool operator==(const IntSize& a, const IntSize& b)
190{
191    return a.width() == b.width() && a.height() == b.height();
192}
193
194inline bool operator!=(const IntSize& a, const IntSize& b)
195{
196    return a.width() != b.width() || a.height() != b.height();
197}
198
199} // namespace WebCore
200
201#endif // IntSize_h
202