1 /*
2 * Copyright (c) 2012, Google 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 are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "platform/geometry/LayoutRect.h"
33
34 #include "platform/LayoutUnit.h"
35 #include "platform/geometry/FloatRect.h"
36 #include <algorithm>
37
38 namespace WebCore {
39
LayoutRect(const FloatRect & r)40 LayoutRect::LayoutRect(const FloatRect& r)
41 : m_location(LayoutPoint(r.location()))
42 , m_size(LayoutSize(r.size()))
43 {
44 }
45
intersects(const LayoutRect & other) const46 bool LayoutRect::intersects(const LayoutRect& other) const
47 {
48 // Checking emptiness handles negative widths as well as zero.
49 return !isEmpty() && !other.isEmpty()
50 && x() < other.maxX() && other.x() < maxX()
51 && y() < other.maxY() && other.y() < maxY();
52 }
53
contains(const LayoutRect & other) const54 bool LayoutRect::contains(const LayoutRect& other) const
55 {
56 return x() <= other.x() && maxX() >= other.maxX()
57 && y() <= other.y() && maxY() >= other.maxY();
58 }
59
intersect(const LayoutRect & other)60 void LayoutRect::intersect(const LayoutRect& other)
61 {
62 LayoutPoint newLocation(std::max(x(), other.x()), std::max(y(), other.y()));
63 LayoutPoint newMaxPoint(std::min(maxX(), other.maxX()), std::min(maxY(), other.maxY()));
64
65 // Return a clean empty rectangle for non-intersecting cases.
66 if (newLocation.x() >= newMaxPoint.x() || newLocation.y() >= newMaxPoint.y()) {
67 newLocation = LayoutPoint(0, 0);
68 newMaxPoint = LayoutPoint(0, 0);
69 }
70
71 m_location = newLocation;
72 m_size = newMaxPoint - newLocation;
73 }
74
unite(const LayoutRect & other)75 void LayoutRect::unite(const LayoutRect& other)
76 {
77 // Handle empty special cases first.
78 if (other.isEmpty())
79 return;
80 if (isEmpty()) {
81 *this = other;
82 return;
83 }
84
85 LayoutPoint newLocation(std::min(x(), other.x()), std::min(y(), other.y()));
86 LayoutPoint newMaxPoint(std::max(maxX(), other.maxX()), std::max(maxY(), other.maxY()));
87
88 m_location = newLocation;
89 m_size = newMaxPoint - newLocation;
90 }
91
uniteIfNonZero(const LayoutRect & other)92 void LayoutRect::uniteIfNonZero(const LayoutRect& other)
93 {
94 // Handle empty special cases first.
95 if (!other.width() && !other.height())
96 return;
97 if (!width() && !height()) {
98 *this = other;
99 return;
100 }
101
102 LayoutPoint newLocation(std::min(x(), other.x()), std::min(y(), other.y()));
103 LayoutPoint newMaxPoint(std::max(maxX(), other.maxX()), std::max(maxY(), other.maxY()));
104
105 m_location = newLocation;
106 m_size = newMaxPoint - newLocation;
107 }
108
scale(float s)109 void LayoutRect::scale(float s)
110 {
111 m_location.scale(s, s);
112 m_size.scale(s);
113 }
114
scale(float xAxisScale,float yAxisScale)115 void LayoutRect::scale(float xAxisScale, float yAxisScale)
116 {
117 m_location.scale(xAxisScale, yAxisScale);
118 m_size.scale(xAxisScale, yAxisScale);
119 }
120
unionRect(const Vector<LayoutRect> & rects)121 LayoutRect unionRect(const Vector<LayoutRect>& rects)
122 {
123 LayoutRect result;
124
125 size_t count = rects.size();
126 for (size_t i = 0; i < count; ++i)
127 result.unite(rects[i]);
128
129 return result;
130 }
131
enclosingIntRect(const LayoutRect & rect)132 IntRect enclosingIntRect(const LayoutRect& rect)
133 {
134 IntPoint location = flooredIntPoint(rect.minXMinYCorner());
135 IntPoint maxPoint = ceiledIntPoint(rect.maxXMaxYCorner());
136
137 return IntRect(location, maxPoint - location);
138 }
139
enclosingLayoutRect(const FloatRect & rect)140 LayoutRect enclosingLayoutRect(const FloatRect& rect)
141 {
142 LayoutPoint location = flooredLayoutPoint(rect.minXMinYCorner());
143 LayoutPoint maxPoint = ceiledLayoutPoint(rect.maxXMaxYCorner());
144 return LayoutRect(location, maxPoint - location);
145 }
146
147 } // namespace WebCore
148