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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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