1/*
2 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
3 * Copyright (C) 2013 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#ifndef IntPoint_h
28#define IntPoint_h
29
30#include "platform/geometry/IntSize.h"
31#include "wtf/MathExtras.h"
32#include "wtf/VectorTraits.h"
33
34#if OS(MACOSX)
35typedef struct CGPoint CGPoint;
36
37#ifdef __OBJC__
38#import <Foundation/Foundation.h>
39#endif
40#endif
41
42namespace blink {
43
44class PLATFORM_EXPORT IntPoint {
45public:
46    IntPoint() : m_x(0), m_y(0) { }
47    IntPoint(int x, int y) : m_x(x), m_y(y) { }
48    explicit IntPoint(const IntSize& size) : m_x(size.width()), m_y(size.height()) { }
49
50    static IntPoint zero() { return IntPoint(); }
51
52    int x() const { return m_x; }
53    int y() const { return m_y; }
54
55    void setX(int x) { m_x = x; }
56    void setY(int y) { m_y = y; }
57
58    void move(const IntSize& s) { move(s.width(), s.height()); }
59    void moveBy(const IntPoint& offset) { move(offset.x(), offset.y()); }
60    void move(int dx, int dy) { m_x += dx; m_y += dy; }
61    void scale(float sx, float sy)
62    {
63        m_x = lroundf(static_cast<float>(m_x * sx));
64        m_y = lroundf(static_cast<float>(m_y * sy));
65    }
66
67    IntPoint expandedTo(const IntPoint& other) const
68    {
69        return IntPoint(m_x > other.m_x ? m_x : other.m_x,
70            m_y > other.m_y ? m_y : other.m_y);
71    }
72
73    IntPoint shrunkTo(const IntPoint& other) const
74    {
75        return IntPoint(m_x < other.m_x ? m_x : other.m_x,
76            m_y < other.m_y ? m_y : other.m_y);
77    }
78
79    int distanceSquaredToPoint(const IntPoint&) const;
80
81    void clampNegativeToZero()
82    {
83        *this = expandedTo(zero());
84    }
85
86    IntPoint transposedPoint() const
87    {
88        return IntPoint(m_y, m_x);
89    }
90
91#if OS(MACOSX)
92    explicit IntPoint(const CGPoint&); // don't do this implicitly since it's lossy
93    operator CGPoint() const;
94
95#if defined(__OBJC__) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
96    explicit IntPoint(const NSPoint&); // don't do this implicitly since it's lossy
97    operator NSPoint() const;
98#endif
99#endif
100
101private:
102    int m_x, m_y;
103};
104
105inline IntPoint& operator+=(IntPoint& a, const IntSize& b)
106{
107    a.move(b.width(), b.height());
108    return a;
109}
110
111inline IntPoint& operator-=(IntPoint& a, const IntSize& b)
112{
113    a.move(-b.width(), -b.height());
114    return a;
115}
116
117inline IntPoint operator+(const IntPoint& a, const IntSize& b)
118{
119    return IntPoint(a.x() + b.width(), a.y() + b.height());
120}
121
122inline IntPoint operator+(const IntPoint& a, const IntPoint& b)
123{
124    return IntPoint(a.x() + b.x(), a.y() + b.y());
125}
126
127inline IntSize operator-(const IntPoint& a, const IntPoint& b)
128{
129    return IntSize(a.x() - b.x(), a.y() - b.y());
130}
131
132inline IntPoint operator-(const IntPoint& a, const IntSize& b)
133{
134    return IntPoint(a.x() - b.width(), a.y() - b.height());
135}
136
137inline IntPoint operator-(const IntPoint& point)
138{
139    return IntPoint(-point.x(), -point.y());
140}
141
142inline bool operator==(const IntPoint& a, const IntPoint& b)
143{
144    return a.x() == b.x() && a.y() == b.y();
145}
146
147inline bool operator!=(const IntPoint& a, const IntPoint& b)
148{
149    return a.x() != b.x() || a.y() != b.y();
150}
151
152inline IntSize toIntSize(const IntPoint& a)
153{
154    return IntSize(a.x(), a.y());
155}
156
157inline int IntPoint::distanceSquaredToPoint(const IntPoint& point) const
158{
159    return ((*this) - point).diagonalLengthSquared();
160}
161
162} // namespace blink
163
164WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::IntPoint);
165
166#endif // IntPoint_h
167