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 "platform/geometry/IntRect.h" 28 29 #include "platform/geometry/FloatRect.h" 30 #include "platform/geometry/LayoutRect.h" 31 #include "third_party/skia/include/core/SkRect.h" 32 33 #include <algorithm> 34 35 namespace blink { 36 37 IntRect::IntRect(const FloatRect& r) 38 : m_location(clampToInteger(r.x()), clampToInteger(r.y())) 39 , m_size(clampToInteger(r.width()), clampToInteger(r.height())) 40 { 41 } 42 43 IntRect::IntRect(const LayoutRect& r) 44 : m_location(r.x(), r.y()) 45 , m_size(r.width(), r.height()) 46 { 47 } 48 49 bool IntRect::intersects(const IntRect& 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 IntRect::contains(const IntRect& other) const 58 { 59 return x() <= other.x() && maxX() >= other.maxX() 60 && y() <= other.y() && maxY() >= other.maxY(); 61 } 62 63 void IntRect::intersect(const IntRect& other) 64 { 65 int left = std::max(x(), other.x()); 66 int top = std::max(y(), other.y()); 67 int right = std::min(maxX(), other.maxX()); 68 int bottom = std::min(maxY(), other.maxY()); 69 70 // Return a clean empty rectangle for non-intersecting cases. 71 if (left >= right || top >= bottom) { 72 left = 0; 73 top = 0; 74 right = 0; 75 bottom = 0; 76 } 77 78 m_location.setX(left); 79 m_location.setY(top); 80 m_size.setWidth(right - left); 81 m_size.setHeight(bottom - top); 82 } 83 84 void IntRect::unite(const IntRect& other) 85 { 86 // Handle empty special cases first. 87 if (other.isEmpty()) 88 return; 89 if (isEmpty()) { 90 *this = other; 91 return; 92 } 93 94 int left = std::min(x(), other.x()); 95 int top = std::min(y(), other.y()); 96 int right = std::max(maxX(), other.maxX()); 97 int bottom = std::max(maxY(), other.maxY()); 98 99 m_location.setX(left); 100 m_location.setY(top); 101 m_size.setWidth(right - left); 102 m_size.setHeight(bottom - top); 103 } 104 105 void IntRect::uniteIfNonZero(const IntRect& other) 106 { 107 // Handle empty special cases first. 108 if (!other.width() && !other.height()) 109 return; 110 if (!width() && !height()) { 111 *this = other; 112 return; 113 } 114 115 int left = std::min(x(), other.x()); 116 int top = std::min(y(), other.y()); 117 int right = std::max(maxX(), other.maxX()); 118 int bottom = std::max(maxY(), other.maxY()); 119 120 m_location.setX(left); 121 m_location.setY(top); 122 m_size.setWidth(right - left); 123 m_size.setHeight(bottom - top); 124 } 125 126 void IntRect::scale(float s) 127 { 128 m_location.setX((int)(x() * s)); 129 m_location.setY((int)(y() * s)); 130 m_size.setWidth((int)(width() * s)); 131 m_size.setHeight((int)(height() * s)); 132 } 133 134 static inline int distanceToInterval(int pos, int start, int end) 135 { 136 if (pos < start) 137 return start - pos; 138 if (pos > end) 139 return end - pos; 140 return 0; 141 } 142 143 IntSize IntRect::differenceToPoint(const IntPoint& point) const 144 { 145 int xdistance = distanceToInterval(point.x(), x(), maxX()); 146 int ydistance = distanceToInterval(point.y(), y(), maxY()); 147 return IntSize(xdistance, ydistance); 148 } 149 150 IntRect::operator SkIRect() const 151 { 152 SkIRect rect = { x(), y(), maxX(), maxY() }; 153 return rect; 154 } 155 156 IntRect::operator SkRect() const 157 { 158 SkRect rect; 159 rect.set(SkIntToScalar(x()), SkIntToScalar(y()), SkIntToScalar(maxX()), SkIntToScalar(maxY())); 160 return rect; 161 } 162 163 IntRect unionRect(const Vector<IntRect>& rects) 164 { 165 IntRect result; 166 167 size_t count = rects.size(); 168 for (size_t i = 0; i < count; ++i) 169 result.unite(rects[i]); 170 171 return result; 172 } 173 174 #ifndef NDEBUG 175 // Prints the rect to the screen. 176 void IntRect::show() const 177 { 178 LayoutRect(*this).show(); 179 } 180 #endif 181 182 } // namespace blink 183
