1/*
2 * Copyright (C) 2003, 2006, 2009 Apple 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 INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "IntRect.h"
28
29#include "FloatRect.h"
30#include "LayoutRect.h"
31#include <algorithm>
32#include <wtf/text/TextStream.h>
33
34namespace WebCore {
35
36IntRect::IntRect(const FloatRect& r)
37 : m_location(clampToInteger(r.x()), clampToInteger(r.y()))
38 , m_size(clampToInteger(r.width()), clampToInteger(r.height()))
39{
40}
41
42IntRect::IntRect(const LayoutRect& r)
43 : m_location(r.x(), r.y())
44 , m_size(r.width(), r.height())
45{
46}
47
48bool IntRect::intersects(const IntRect& other) const
49{
50 // Checking emptiness handles negative widths as well as zero.
51 return !isEmpty() && !other.isEmpty()
52 && x() < other.maxX() && other.x() < maxX()
53 && y() < other.maxY() && other.y() < maxY();
54}
55
56bool IntRect::contains(const IntRect& other) const
57{
58 return x() <= other.x() && maxX() >= other.maxX()
59 && y() <= other.y() && maxY() >= other.maxY();
60}
61
62void IntRect::intersect(const IntRect& other)
63{
64 int l = std::max(x(), other.x());
65 int t = std::max(y(), other.y());
66 int r = std::min(maxX(), other.maxX());
67 int b = std::min(maxY(), other.maxY());
68
69 // Return a clean empty rectangle for non-intersecting cases.
70 if (l >= r || t >= b) {
71 l = 0;
72 t = 0;
73 r = 0;
74 b = 0;
75 }
76
77 m_location.setX(l);
78 m_location.setY(t);
79 m_size.setWidth(r - l);
80 m_size.setHeight(b - t);
81}
82
83void IntRect::unite(const IntRect& other)
84{
85 // Handle empty special cases first.
86 if (other.isEmpty())
87 return;
88 if (isEmpty()) {
89 *this = other;
90 return;
91 }
92
93 int l = std::min(x(), other.x());
94 int t = std::min(y(), other.y());
95 int r = std::max(maxX(), other.maxX());
96 int b = std::max(maxY(), other.maxY());
97
98 m_location.setX(l);
99 m_location.setY(t);
100 m_size.setWidth(r - l);
101 m_size.setHeight(b - t);
102}
103
104void IntRect::uniteIfNonZero(const IntRect& other)
105{
106 // Handle empty special cases first.
107 if (!other.width() && !other.height())
108 return;
109 if (!width() && !height()) {
110 *this = other;
111 return;
112 }
113
114 int left = std::min(x(), other.x());
115 int top = std::min(y(), other.y());
116 int right = std::max(maxX(), other.maxX());
117 int bottom = std::max(maxY(), other.maxY());
118
119 m_location.setX(left);
120 m_location.setY(top);
121 m_size.setWidth(right - left);
122 m_size.setHeight(bottom - top);
123}
124
125void IntRect::scale(float s)
126{
127 m_location.setX((int)(x() * s));
128 m_location.setY((int)(y() * s));
129 m_size.setWidth((int)(width() * s));
130 m_size.setHeight((int)(height() * s));
131}
132
133static inline int distanceToInterval(int pos, int start, int end)
134{
135 if (pos < start)
136 return start - pos;
137 if (pos > end)
138 return end - pos;
139 return 0;
140}
141
142IntSize IntRect::differenceToPoint(const IntPoint& point) const
143{
144 int xdistance = distanceToInterval(point.x(), x(), maxX());
145 int ydistance = distanceToInterval(point.y(), y(), maxY());
146 return IntSize(xdistance, ydistance);
147}
148
149TextStream& operator<<(TextStream& ts, const IntRect& r)
150{
151 if (ts.hasFormattingFlag(TextStream::Formatting::SVGStyleRect))
152 return ts << "at (" << r.x() << "," << r.y() << ") size " << r.width() << "x" << r.height();
153
154 return ts << r.location() << " " << r.size();
155}
156
157} // namespace WebCore
158