Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "ppapi/cpp/rect.h" |
| 6 | |
| 7 | #include <algorithm> |
| 8 | |
| 9 | namespace { |
| 10 | |
Torne (Richard Coles) | 46d4c2b | 2014-06-09 12:00:27 +0100 | [diff] [blame] | 11 | template<typename T> |
| 12 | void AdjustAlongAxis(T dst_origin, T dst_size, |
| 13 | T* origin, T* size) { |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 14 | if (*origin < dst_origin) { |
| 15 | *origin = dst_origin; |
| 16 | *size = std::min(dst_size, *size); |
| 17 | } else { |
| 18 | *size = std::min(dst_size, *size); |
| 19 | *origin = std::min(dst_origin + dst_size, *origin + *size) - *size; |
| 20 | } |
| 21 | } |
| 22 | |
| 23 | } // namespace |
| 24 | |
| 25 | namespace pp { |
| 26 | |
| 27 | void Rect::Inset(int32_t left, int32_t top, int32_t right, int32_t bottom) { |
| 28 | Offset(left, top); |
| 29 | set_width(std::max<int32_t>(width() - left - right, 0)); |
| 30 | set_height(std::max<int32_t>(height() - top - bottom, 0)); |
| 31 | } |
| 32 | |
| 33 | void Rect::Offset(int32_t horizontal, int32_t vertical) { |
| 34 | rect_.point.x += horizontal; |
| 35 | rect_.point.y += vertical; |
| 36 | } |
| 37 | |
| 38 | bool Rect::Contains(int32_t point_x, int32_t point_y) const { |
| 39 | return (point_x >= x()) && (point_x < right()) && |
| 40 | (point_y >= y()) && (point_y < bottom()); |
| 41 | } |
| 42 | |
| 43 | bool Rect::Contains(const Rect& rect) const { |
| 44 | return (rect.x() >= x() && rect.right() <= right() && |
| 45 | rect.y() >= y() && rect.bottom() <= bottom()); |
| 46 | } |
| 47 | |
| 48 | bool Rect::Intersects(const Rect& rect) const { |
| 49 | return !(rect.x() >= right() || rect.right() <= x() || |
| 50 | rect.y() >= bottom() || rect.bottom() <= y()); |
| 51 | } |
| 52 | |
| 53 | Rect Rect::Intersect(const Rect& rect) const { |
| 54 | int32_t rx = std::max(x(), rect.x()); |
| 55 | int32_t ry = std::max(y(), rect.y()); |
| 56 | int32_t rr = std::min(right(), rect.right()); |
| 57 | int32_t rb = std::min(bottom(), rect.bottom()); |
| 58 | |
| 59 | if (rx >= rr || ry >= rb) |
| 60 | rx = ry = rr = rb = 0; // non-intersecting |
| 61 | |
| 62 | return Rect(rx, ry, rr - rx, rb - ry); |
| 63 | } |
| 64 | |
| 65 | Rect Rect::Union(const Rect& rect) const { |
| 66 | // special case empty rects... |
| 67 | if (IsEmpty()) |
| 68 | return rect; |
| 69 | if (rect.IsEmpty()) |
| 70 | return *this; |
| 71 | |
| 72 | int32_t rx = std::min(x(), rect.x()); |
| 73 | int32_t ry = std::min(y(), rect.y()); |
| 74 | int32_t rr = std::max(right(), rect.right()); |
| 75 | int32_t rb = std::max(bottom(), rect.bottom()); |
| 76 | |
| 77 | return Rect(rx, ry, rr - rx, rb - ry); |
| 78 | } |
| 79 | |
| 80 | Rect Rect::Subtract(const Rect& rect) const { |
| 81 | // boundary cases: |
| 82 | if (!Intersects(rect)) |
| 83 | return *this; |
| 84 | if (rect.Contains(*this)) |
| 85 | return Rect(); |
| 86 | |
| 87 | int32_t rx = x(); |
| 88 | int32_t ry = y(); |
| 89 | int32_t rr = right(); |
| 90 | int32_t rb = bottom(); |
| 91 | |
| 92 | if (rect.y() <= y() && rect.bottom() >= bottom()) { |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 93 | // complete intersection in the y-direction |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 94 | if (rect.x() <= x()) { |
| 95 | rx = rect.right(); |
| 96 | } else { |
| 97 | rr = rect.x(); |
| 98 | } |
| 99 | } else if (rect.x() <= x() && rect.right() >= right()) { |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 100 | // complete intersection in the x-direction |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 101 | if (rect.y() <= y()) { |
| 102 | ry = rect.bottom(); |
| 103 | } else { |
| 104 | rb = rect.y(); |
| 105 | } |
| 106 | } |
| 107 | return Rect(rx, ry, rr - rx, rb - ry); |
| 108 | } |
| 109 | |
| 110 | Rect Rect::AdjustToFit(const Rect& rect) const { |
| 111 | int32_t new_x = x(); |
| 112 | int32_t new_y = y(); |
| 113 | int32_t new_width = width(); |
| 114 | int32_t new_height = height(); |
| 115 | AdjustAlongAxis(rect.x(), rect.width(), &new_x, &new_width); |
| 116 | AdjustAlongAxis(rect.y(), rect.height(), &new_y, &new_height); |
| 117 | return Rect(new_x, new_y, new_width, new_height); |
| 118 | } |
| 119 | |
| 120 | Point Rect::CenterPoint() const { |
| 121 | return Point(x() + (width() + 1) / 2, y() + (height() + 1) / 2); |
| 122 | } |
| 123 | |
| 124 | bool Rect::SharesEdgeWith(const Rect& rect) const { |
| 125 | return (y() == rect.y() && height() == rect.height() && |
| 126 | (x() == rect.right() || right() == rect.x())) || |
| 127 | (x() == rect.x() && width() == rect.width() && |
| 128 | (y() == rect.bottom() || bottom() == rect.y())); |
| 129 | } |
| 130 | |
Torne (Richard Coles) | 46d4c2b | 2014-06-09 12:00:27 +0100 | [diff] [blame] | 131 | void FloatRect::Inset(float left, float top, float right, float bottom) { |
| 132 | Offset(left, top); |
| 133 | set_width(std::max<float>(width() - left - right, 0.0f)); |
| 134 | set_height(std::max<float>(height() - top - bottom, 0.0f)); |
| 135 | } |
| 136 | |
| 137 | void FloatRect::Offset(float horizontal, float vertical) { |
| 138 | rect_.point.x += horizontal; |
| 139 | rect_.point.y += vertical; |
| 140 | } |
| 141 | |
| 142 | bool FloatRect::Contains(float point_x, float point_y) const { |
| 143 | return (point_x >= x()) && (point_x < right()) && |
| 144 | (point_y >= y()) && (point_y < bottom()); |
| 145 | } |
| 146 | |
| 147 | bool FloatRect::Contains(const FloatRect& rect) const { |
| 148 | return (rect.x() >= x() && rect.right() <= right() && |
| 149 | rect.y() >= y() && rect.bottom() <= bottom()); |
| 150 | } |
| 151 | |
| 152 | bool FloatRect::Intersects(const FloatRect& rect) const { |
| 153 | return !(rect.x() >= right() || rect.right() <= x() || |
| 154 | rect.y() >= bottom() || rect.bottom() <= y()); |
| 155 | } |
| 156 | |
| 157 | FloatRect FloatRect::Intersect(const FloatRect& rect) const { |
| 158 | float rx = std::max(x(), rect.x()); |
| 159 | float ry = std::max(y(), rect.y()); |
| 160 | float rr = std::min(right(), rect.right()); |
| 161 | float rb = std::min(bottom(), rect.bottom()); |
| 162 | |
| 163 | if (rx >= rr || ry >= rb) |
| 164 | rx = ry = rr = rb = 0; // non-intersecting |
| 165 | |
| 166 | return FloatRect(rx, ry, rr - rx, rb - ry); |
| 167 | } |
| 168 | |
| 169 | FloatRect FloatRect::Union(const FloatRect& rect) const { |
| 170 | // special case empty rects... |
| 171 | if (IsEmpty()) |
| 172 | return rect; |
| 173 | if (rect.IsEmpty()) |
| 174 | return *this; |
| 175 | |
| 176 | float rx = std::min(x(), rect.x()); |
| 177 | float ry = std::min(y(), rect.y()); |
| 178 | float rr = std::max(right(), rect.right()); |
| 179 | float rb = std::max(bottom(), rect.bottom()); |
| 180 | |
| 181 | return FloatRect(rx, ry, rr - rx, rb - ry); |
| 182 | } |
| 183 | |
| 184 | FloatRect FloatRect::Subtract(const FloatRect& rect) const { |
| 185 | // boundary cases: |
| 186 | if (!Intersects(rect)) |
| 187 | return *this; |
| 188 | if (rect.Contains(*this)) |
| 189 | return FloatRect(); |
| 190 | |
| 191 | float rx = x(); |
| 192 | float ry = y(); |
| 193 | float rr = right(); |
| 194 | float rb = bottom(); |
| 195 | |
| 196 | if (rect.y() <= y() && rect.bottom() >= bottom()) { |
| 197 | // complete intersection in the y-direction |
| 198 | if (rect.x() <= x()) { |
| 199 | rx = rect.right(); |
| 200 | } else { |
| 201 | rr = rect.x(); |
| 202 | } |
| 203 | } else if (rect.x() <= x() && rect.right() >= right()) { |
| 204 | // complete intersection in the x-direction |
| 205 | if (rect.y() <= y()) { |
| 206 | ry = rect.bottom(); |
| 207 | } else { |
| 208 | rb = rect.y(); |
| 209 | } |
| 210 | } |
| 211 | return FloatRect(rx, ry, rr - rx, rb - ry); |
| 212 | } |
| 213 | |
| 214 | FloatRect FloatRect::AdjustToFit(const FloatRect& rect) const { |
| 215 | float new_x = x(); |
| 216 | float new_y = y(); |
| 217 | float new_width = width(); |
| 218 | float new_height = height(); |
| 219 | AdjustAlongAxis(rect.x(), rect.width(), &new_x, &new_width); |
| 220 | AdjustAlongAxis(rect.y(), rect.height(), &new_y, &new_height); |
| 221 | return FloatRect(new_x, new_y, new_width, new_height); |
| 222 | } |
| 223 | |
| 224 | FloatPoint FloatRect::CenterPoint() const { |
| 225 | return FloatPoint(x() + (width() + 1.0f) / 2.0f, |
| 226 | y() + (height() + 1.0f) / 2.0f); |
| 227 | } |
| 228 | |
| 229 | bool FloatRect::SharesEdgeWith(const FloatRect& rect) const { |
| 230 | return (y() == rect.y() && height() == rect.height() && |
| 231 | (x() == rect.right() || right() == rect.x())) || |
| 232 | (x() == rect.x() && width() == rect.width() && |
| 233 | (y() == rect.bottom() || bottom() == rect.y())); |
| 234 | } |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 235 | } // namespace pp |