1 /*
2 * Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved.
3 * Copyright (C) 2010 Google Inc. All rights reserved.
4 * Copyright (C) 2013 Xidorn Quan (quanxunzhen@gmail.com)
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "config.h"
29 #include "platform/geometry/RoundedRect.h"
30
31 #include "wtf/Assertions.h"
32 #include <algorithm>
33
34 using namespace std;
35
36 namespace WebCore {
37
isZero() const38 bool RoundedRect::Radii::isZero() const
39 {
40 return m_topLeft.isZero() && m_topRight.isZero() && m_bottomLeft.isZero() && m_bottomRight.isZero();
41 }
42
scale(float factor)43 void RoundedRect::Radii::scale(float factor)
44 {
45 if (factor == 1)
46 return;
47
48 // If either radius on a corner becomes zero, reset both radii on that corner.
49 m_topLeft.scale(factor);
50 if (!m_topLeft.width() || !m_topLeft.height())
51 m_topLeft = IntSize();
52 m_topRight.scale(factor);
53 if (!m_topRight.width() || !m_topRight.height())
54 m_topRight = IntSize();
55 m_bottomLeft.scale(factor);
56 if (!m_bottomLeft.width() || !m_bottomLeft.height())
57 m_bottomLeft = IntSize();
58 m_bottomRight.scale(factor);
59 if (!m_bottomRight.width() || !m_bottomRight.height())
60 m_bottomRight = IntSize();
61
62 }
63
expand(int topWidth,int bottomWidth,int leftWidth,int rightWidth)64 void RoundedRect::Radii::expand(int topWidth, int bottomWidth, int leftWidth, int rightWidth)
65 {
66 if (m_topLeft.width() > 0 && m_topLeft.height() > 0) {
67 m_topLeft.setWidth(max<int>(0, m_topLeft.width() + leftWidth));
68 m_topLeft.setHeight(max<int>(0, m_topLeft.height() + topWidth));
69 }
70 if (m_topRight.width() > 0 && m_topRight.height() > 0) {
71 m_topRight.setWidth(max<int>(0, m_topRight.width() + rightWidth));
72 m_topRight.setHeight(max<int>(0, m_topRight.height() + topWidth));
73 }
74 if (m_bottomLeft.width() > 0 && m_bottomLeft.height() > 0) {
75 m_bottomLeft.setWidth(max<int>(0, m_bottomLeft.width() + leftWidth));
76 m_bottomLeft.setHeight(max<int>(0, m_bottomLeft.height() + bottomWidth));
77 }
78 if (m_bottomRight.width() > 0 && m_bottomRight.height() > 0) {
79 m_bottomRight.setWidth(max<int>(0, m_bottomRight.width() + rightWidth));
80 m_bottomRight.setHeight(max<int>(0, m_bottomRight.height() + bottomWidth));
81 }
82 }
83
inflateWithRadii(int size)84 void RoundedRect::inflateWithRadii(int size)
85 {
86 IntRect old = m_rect;
87
88 m_rect.inflate(size);
89 // Considering the inflation factor of shorter size to scale the radii seems appropriate here
90 float factor;
91 if (m_rect.width() < m_rect.height())
92 factor = old.width() ? (float)m_rect.width() / old.width() : int(0);
93 else
94 factor = old.height() ? (float)m_rect.height() / old.height() : int(0);
95
96 m_radii.scale(factor);
97 }
98
includeLogicalEdges(const RoundedRect::Radii & edges,bool isHorizontal,bool includeLogicalLeftEdge,bool includeLogicalRightEdge)99 void RoundedRect::Radii::includeLogicalEdges(const RoundedRect::Radii& edges, bool isHorizontal, bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
100 {
101 if (includeLogicalLeftEdge) {
102 if (isHorizontal)
103 m_bottomLeft = edges.bottomLeft();
104 else
105 m_topRight = edges.topRight();
106 m_topLeft = edges.topLeft();
107 }
108
109 if (includeLogicalRightEdge) {
110 if (isHorizontal)
111 m_topRight = edges.topRight();
112 else
113 m_bottomLeft = edges.bottomLeft();
114 m_bottomRight = edges.bottomRight();
115 }
116 }
117
excludeLogicalEdges(bool isHorizontal,bool excludeLogicalLeftEdge,bool excludeLogicalRightEdge)118 void RoundedRect::Radii::excludeLogicalEdges(bool isHorizontal, bool excludeLogicalLeftEdge, bool excludeLogicalRightEdge)
119 {
120 if (excludeLogicalLeftEdge) {
121 if (isHorizontal)
122 m_bottomLeft = IntSize();
123 else
124 m_topRight = IntSize();
125 m_topLeft = IntSize();
126 }
127
128 if (excludeLogicalRightEdge) {
129 if (isHorizontal)
130 m_topRight = IntSize();
131 else
132 m_bottomLeft = IntSize();
133 m_bottomRight = IntSize();
134 }
135 }
136
RoundedRect(int x,int y,int width,int height)137 RoundedRect::RoundedRect(int x, int y, int width, int height)
138 : m_rect(x, y, width, height)
139 {
140 }
141
RoundedRect(const IntRect & rect,const Radii & radii)142 RoundedRect::RoundedRect(const IntRect& rect, const Radii& radii)
143 : m_rect(rect)
144 , m_radii(radii)
145 {
146 }
147
RoundedRect(const IntRect & rect,const IntSize & topLeft,const IntSize & topRight,const IntSize & bottomLeft,const IntSize & bottomRight)148 RoundedRect::RoundedRect(const IntRect& rect, const IntSize& topLeft, const IntSize& topRight, const IntSize& bottomLeft, const IntSize& bottomRight)
149 : m_rect(rect)
150 , m_radii(topLeft, topRight, bottomLeft, bottomRight)
151 {
152 }
153
radiusCenterRect() const154 IntRect RoundedRect::radiusCenterRect() const
155 {
156 ASSERT(isRenderable());
157 int minX = m_rect.x() + max(m_radii.topLeft().width(), m_radii.bottomLeft().width());
158 int minY = m_rect.y() + max(m_radii.topLeft().height(), m_radii.topRight().height());
159 int maxX = m_rect.maxX() - max(m_radii.topRight().width(), m_radii.bottomRight().width());
160 int maxY = m_rect.maxY() - max(m_radii.bottomLeft().height(), m_radii.bottomRight().height());
161 return IntRect(minX, minY, maxX - minX, maxY - minY);
162 }
163
includeLogicalEdges(const Radii & edges,bool isHorizontal,bool includeLogicalLeftEdge,bool includeLogicalRightEdge)164 void RoundedRect::includeLogicalEdges(const Radii& edges, bool isHorizontal, bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
165 {
166 m_radii.includeLogicalEdges(edges, isHorizontal, includeLogicalLeftEdge, includeLogicalRightEdge);
167 }
168
excludeLogicalEdges(bool isHorizontal,bool excludeLogicalLeftEdge,bool excludeLogicalRightEdge)169 void RoundedRect::excludeLogicalEdges(bool isHorizontal, bool excludeLogicalLeftEdge, bool excludeLogicalRightEdge)
170 {
171 m_radii.excludeLogicalEdges(isHorizontal, excludeLogicalLeftEdge, excludeLogicalRightEdge);
172 }
173
isRenderable() const174 bool RoundedRect::isRenderable() const
175 {
176 return m_radii.topLeft().width() + m_radii.topRight().width() <= m_rect.width()
177 && m_radii.bottomLeft().width() + m_radii.bottomRight().width() <= m_rect.width()
178 && m_radii.topLeft().height() + m_radii.bottomLeft().height() <= m_rect.height()
179 && m_radii.topRight().height() + m_radii.bottomRight().height() <= m_rect.height();
180 }
181
adjustRadii()182 void RoundedRect::adjustRadii()
183 {
184 int maxRadiusWidth = std::max(m_radii.topLeft().width() + m_radii.topRight().width(), m_radii.bottomLeft().width() + m_radii.bottomRight().width());
185 int maxRadiusHeight = std::max(m_radii.topLeft().height() + m_radii.bottomLeft().height(), m_radii.topRight().height() + m_radii.bottomRight().height());
186
187 if (maxRadiusWidth <= 0 || maxRadiusHeight <= 0) {
188 m_radii.scale(0.0f);
189 return;
190 }
191 float widthRatio = static_cast<float>(m_rect.width()) / maxRadiusWidth;
192 float heightRatio = static_cast<float>(m_rect.height()) / maxRadiusHeight;
193 m_radii.scale(widthRatio < heightRatio ? widthRatio : heightRatio);
194 }
195
intersectsQuad(const FloatQuad & quad) const196 bool RoundedRect::intersectsQuad(const FloatQuad& quad) const
197 {
198 FloatRect rect(m_rect);
199 if (!quad.intersectsRect(rect))
200 return false;
201
202 const IntSize& topLeft = m_radii.topLeft();
203 if (!topLeft.isEmpty()) {
204 FloatRect rect(m_rect.x(), m_rect.y(), topLeft.width(), topLeft.height());
205 if (quad.intersectsRect(rect)) {
206 FloatPoint center(m_rect.x() + topLeft.width(), m_rect.y() + topLeft.height());
207 FloatSize size(topLeft.width(), topLeft.height());
208 if (!quad.intersectsEllipse(center, size))
209 return false;
210 }
211 }
212
213 const IntSize& topRight = m_radii.topRight();
214 if (!topRight.isEmpty()) {
215 FloatRect rect(m_rect.maxX() - topRight.width(), m_rect.y(), topRight.width(), topRight.height());
216 if (quad.intersectsRect(rect)) {
217 FloatPoint center(m_rect.maxX() - topRight.width(), m_rect.y() + topRight.height());
218 FloatSize size(topRight.width(), topRight.height());
219 if (!quad.intersectsEllipse(center, size))
220 return false;
221 }
222 }
223
224 const IntSize& bottomLeft = m_radii.bottomLeft();
225 if (!bottomLeft.isEmpty()) {
226 FloatRect rect(m_rect.x(), m_rect.maxY() - bottomLeft.height(), bottomLeft.width(), bottomLeft.height());
227 if (quad.intersectsRect(rect)) {
228 FloatPoint center(m_rect.x() + bottomLeft.width(), m_rect.maxY() - bottomLeft.height());
229 FloatSize size(bottomLeft.width(), bottomLeft.height());
230 if (!quad.intersectsEllipse(center, size))
231 return false;
232 }
233 }
234
235 const IntSize& bottomRight = m_radii.bottomRight();
236 if (!bottomRight.isEmpty()) {
237 FloatRect rect(m_rect.maxX() - bottomRight.width(), m_rect.maxY() - bottomRight.height(), bottomRight.width(), bottomRight.height());
238 if (quad.intersectsRect(rect)) {
239 FloatPoint center(m_rect.maxX() - bottomRight.width(), m_rect.maxY() - bottomRight.height());
240 FloatSize size(bottomRight.width(), bottomRight.height());
241 if (!quad.intersectsEllipse(center, size))
242 return false;
243 }
244 }
245
246 return true;
247 }
248
249 } // namespace WebCore
250