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Side by Side Diff: Source/core/platform/graphics/LayoutRect.cpp

Issue 25494003: Move geometry classes from core/platform/graphics to platform/geometry (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Created 7 years, 2 months ago
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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 "core/platform/graphics/LayoutRect.h"
33
34 #include <algorithm>
35 #include "core/platform/graphics/FloatRect.h"
36 #include "platform/LayoutUnit.h"
37
38 using std::max;
39 using std::min;
40
41 namespace WebCore {
42
43 LayoutRect::LayoutRect(const FloatRect& r)
44 : m_location(LayoutPoint(r.location()))
45 , m_size(LayoutSize(r.size()))
46 {
47 }
48
49 bool LayoutRect::intersects(const LayoutRect& other) const
50 {
51 // Checking emptiness handles negative widths as well as zero.
52 return !isEmpty() && !other.isEmpty()
53 && x() < other.maxX() && other.x() < maxX()
54 && y() < other.maxY() && other.y() < maxY();
55 }
56
57 bool LayoutRect::contains(const LayoutRect& other) const
58 {
59 return x() <= other.x() && maxX() >= other.maxX()
60 && y() <= other.y() && maxY() >= other.maxY();
61 }
62
63 void LayoutRect::intersect(const LayoutRect& other)
64 {
65 LayoutPoint newLocation(max(x(), other.x()), max(y(), other.y()));
66 LayoutPoint newMaxPoint(min(maxX(), other.maxX()), min(maxY(), other.maxY()) );
67
68 // Return a clean empty rectangle for non-intersecting cases.
69 if (newLocation.x() >= newMaxPoint.x() || newLocation.y() >= newMaxPoint.y() ) {
70 newLocation = LayoutPoint(0, 0);
71 newMaxPoint = LayoutPoint(0, 0);
72 }
73
74 m_location = newLocation;
75 m_size = newMaxPoint - newLocation;
76 }
77
78 void LayoutRect::unite(const LayoutRect& other)
79 {
80 // Handle empty special cases first.
81 if (other.isEmpty())
82 return;
83 if (isEmpty()) {
84 *this = other;
85 return;
86 }
87
88 LayoutPoint newLocation(min(x(), other.x()), min(y(), other.y()));
89 LayoutPoint newMaxPoint(max(maxX(), other.maxX()), max(maxY(), other.maxY()) );
90
91 m_location = newLocation;
92 m_size = newMaxPoint - newLocation;
93 }
94
95 void LayoutRect::uniteIfNonZero(const LayoutRect& other)
96 {
97 // Handle empty special cases first.
98 if (!other.width() && !other.height())
99 return;
100 if (!width() && !height()) {
101 *this = other;
102 return;
103 }
104
105 LayoutPoint newLocation(min(x(), other.x()), min(y(), other.y()));
106 LayoutPoint newMaxPoint(max(maxX(), other.maxX()), max(maxY(), other.maxY()) );
107
108 m_location = newLocation;
109 m_size = newMaxPoint - newLocation;
110 }
111
112 void LayoutRect::scale(float s)
113 {
114 m_location.scale(s, s);
115 m_size.scale(s);
116 }
117
118 void LayoutRect::scale(float xAxisScale, float yAxisScale)
119 {
120 m_location.scale(xAxisScale, yAxisScale);
121 m_size.scale(xAxisScale, yAxisScale);
122 }
123
124 LayoutRect unionRect(const Vector<LayoutRect>& rects)
125 {
126 LayoutRect result;
127
128 size_t count = rects.size();
129 for (size_t i = 0; i < count; ++i)
130 result.unite(rects[i]);
131
132 return result;
133 }
134
135 IntRect enclosingIntRect(const LayoutRect& rect)
136 {
137 IntPoint location = flooredIntPoint(rect.minXMinYCorner());
138 IntPoint maxPoint = ceiledIntPoint(rect.maxXMaxYCorner());
139
140 return IntRect(location, maxPoint - location);
141 }
142
143 LayoutRect enclosingLayoutRect(const FloatRect& rect)
144 {
145 LayoutPoint location = flooredLayoutPoint(rect.minXMinYCorner());
146 LayoutPoint maxPoint = ceiledLayoutPoint(rect.maxXMaxYCorner());
147 return LayoutRect(location, maxPoint - location);
148 }
149
150 } // namespace WebCore
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