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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 #ifndef LayoutPoint_h | |
32 #define LayoutPoint_h | |
33 | |
34 #include "core/platform/graphics/FloatPoint.h" | |
35 #include "core/platform/graphics/LayoutSize.h" | |
36 #include "wtf/MathExtras.h" | |
37 | |
38 namespace WebCore { | |
39 | |
40 class LayoutPoint { | |
41 public: | |
42 LayoutPoint() { } | |
43 LayoutPoint(LayoutUnit x, LayoutUnit y) : m_x(x), m_y(y) { } | |
44 LayoutPoint(const IntPoint& point) : m_x(point.x()), m_y(point.y()) { } | |
45 explicit LayoutPoint(const FloatPoint& size) : m_x(size.x()), m_y(size.y())
{ } | |
46 explicit LayoutPoint(const LayoutSize& size) : m_x(size.width()), m_y(size.h
eight()) { } | |
47 | |
48 static LayoutPoint zero() { return LayoutPoint(); } | |
49 | |
50 LayoutUnit x() const { return m_x; } | |
51 LayoutUnit y() const { return m_y; } | |
52 | |
53 void setX(LayoutUnit x) { m_x = x; } | |
54 void setY(LayoutUnit y) { m_y = y; } | |
55 | |
56 void move(const LayoutSize& s) { move(s.width(), s.height()); } | |
57 void moveBy(const LayoutPoint& offset) { move(offset.x(), offset.y()); } | |
58 void move(LayoutUnit dx, LayoutUnit dy) { m_x += dx; m_y += dy; } | |
59 void scale(float sx, float sy) | |
60 { | |
61 m_x *= sx; | |
62 m_y *= sy; | |
63 } | |
64 | |
65 LayoutPoint expandedTo(const LayoutPoint& other) const | |
66 { | |
67 return LayoutPoint(std::max(m_x, other.m_x), std::max(m_y, other.m_y)); | |
68 } | |
69 | |
70 LayoutPoint shrunkTo(const LayoutPoint& other) const | |
71 { | |
72 return LayoutPoint(std::min(m_x, other.m_x), std::min(m_y, other.m_y)); | |
73 } | |
74 | |
75 void clampNegativeToZero() | |
76 { | |
77 *this = expandedTo(zero()); | |
78 } | |
79 | |
80 LayoutPoint transposedPoint() const | |
81 { | |
82 return LayoutPoint(m_y, m_x); | |
83 } | |
84 | |
85 private: | |
86 LayoutUnit m_x, m_y; | |
87 }; | |
88 | |
89 inline LayoutPoint& operator+=(LayoutPoint& a, const LayoutSize& b) | |
90 { | |
91 a.move(b.width(), b.height()); | |
92 return a; | |
93 } | |
94 | |
95 inline LayoutPoint& operator-=(LayoutPoint& a, const LayoutSize& b) | |
96 { | |
97 a.move(-b.width(), -b.height()); | |
98 return a; | |
99 } | |
100 | |
101 inline LayoutPoint operator+(const LayoutPoint& a, const LayoutSize& b) | |
102 { | |
103 return LayoutPoint(a.x() + b.width(), a.y() + b.height()); | |
104 } | |
105 | |
106 inline LayoutPoint operator+(const LayoutPoint& a, const LayoutPoint& b) | |
107 { | |
108 return LayoutPoint(a.x() + b.x(), a.y() + b.y()); | |
109 } | |
110 | |
111 inline LayoutSize operator-(const LayoutPoint& a, const LayoutPoint& b) | |
112 { | |
113 return LayoutSize(a.x() - b.x(), a.y() - b.y()); | |
114 } | |
115 | |
116 inline LayoutPoint operator-(const LayoutPoint& a, const LayoutSize& b) | |
117 { | |
118 return LayoutPoint(a.x() - b.width(), a.y() - b.height()); | |
119 } | |
120 | |
121 inline LayoutPoint operator-(const LayoutPoint& point) | |
122 { | |
123 return LayoutPoint(-point.x(), -point.y()); | |
124 } | |
125 | |
126 inline bool operator==(const LayoutPoint& a, const LayoutPoint& b) | |
127 { | |
128 return a.x() == b.x() && a.y() == b.y(); | |
129 } | |
130 | |
131 inline bool operator!=(const LayoutPoint& a, const LayoutPoint& b) | |
132 { | |
133 return a.x() != b.x() || a.y() != b.y(); | |
134 } | |
135 | |
136 inline LayoutPoint toPoint(const LayoutSize& size) | |
137 { | |
138 return LayoutPoint(size.width(), size.height()); | |
139 } | |
140 | |
141 inline LayoutPoint toLayoutPoint(const LayoutSize& p) | |
142 { | |
143 return LayoutPoint(p.width(), p.height()); | |
144 } | |
145 | |
146 inline LayoutSize toSize(const LayoutPoint& a) | |
147 { | |
148 return LayoutSize(a.x(), a.y()); | |
149 } | |
150 | |
151 inline IntPoint flooredIntPoint(const LayoutPoint& point) | |
152 { | |
153 return IntPoint(point.x().floor(), point.y().floor()); | |
154 } | |
155 | |
156 inline IntPoint roundedIntPoint(const LayoutPoint& point) | |
157 { | |
158 return IntPoint(point.x().round(), point.y().round()); | |
159 } | |
160 | |
161 inline IntPoint roundedIntPoint(const LayoutSize& size) | |
162 { | |
163 return IntPoint(size.width().round(), size.height().round()); | |
164 } | |
165 | |
166 inline IntPoint ceiledIntPoint(const LayoutPoint& point) | |
167 { | |
168 return IntPoint(point.x().ceil(), point.y().ceil()); | |
169 } | |
170 | |
171 inline LayoutPoint flooredLayoutPoint(const FloatPoint& p) | |
172 { | |
173 return LayoutPoint(LayoutUnit::fromFloatFloor(p.x()), LayoutUnit::fromFloatF
loor(p.y())); | |
174 } | |
175 | |
176 inline LayoutPoint ceiledLayoutPoint(const FloatPoint& p) | |
177 { | |
178 return LayoutPoint(LayoutUnit::fromFloatCeil(p.x()), LayoutUnit::fromFloatCe
il(p.y())); | |
179 } | |
180 | |
181 inline IntSize pixelSnappedIntSize(const LayoutSize& s, const LayoutPoint& p) | |
182 { | |
183 return IntSize(snapSizeToPixel(s.width(), p.x()), snapSizeToPixel(s.height()
, p.y())); | |
184 } | |
185 | |
186 inline LayoutPoint roundedLayoutPoint(const FloatPoint& p) | |
187 { | |
188 return LayoutPoint(p); | |
189 } | |
190 | |
191 inline LayoutSize toLayoutSize(const LayoutPoint& p) | |
192 { | |
193 return LayoutSize(p.x(), p.y()); | |
194 } | |
195 | |
196 inline LayoutPoint flooredLayoutPoint(const FloatSize& s) | |
197 { | |
198 return flooredLayoutPoint(FloatPoint(s)); | |
199 } | |
200 | |
201 | |
202 } // namespace WebCore | |
203 | |
204 #endif // LayoutPoint_h | |
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