1 /*
2 * Copyright (C) 2003, 2006, 2007 Apple Inc. All rights reserved.
3 * Copyright (C) 2005 Nokia. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #ifndef FloatRect_h
28 #define FloatRect_h
29
30 #include "platform/geometry/FloatPoint.h"
31 #include "third_party/skia/include/core/SkRect.h"
32 #include "wtf/Vector.h"
33
34 #if OS(MACOSX)
35 typedef struct CGRect CGRect;
36
37 #ifdef __OBJC__
38 #import <Foundation/Foundation.h>
39 #endif
40 #endif
41
42 namespace blink {
43
44 class LayoutRect;
45 class IntRect;
46
47 class PLATFORM_EXPORT FloatRect {
48 public:
49 enum ContainsMode {
50 InsideOrOnStroke,
51 InsideButNotOnStroke
52 };
53
FloatRect()54 FloatRect() { }
FloatRect(const FloatPoint & location,const FloatSize & size)55 FloatRect(const FloatPoint& location, const FloatSize& size)
56 : m_location(location), m_size(size) { }
FloatRect(float x,float y,float width,float height)57 FloatRect(float x, float y, float width, float height)
58 : m_location(FloatPoint(x, y)), m_size(FloatSize(width, height)) { }
59 FloatRect(const IntRect&);
60 FloatRect(const LayoutRect&);
61 FloatRect(const SkRect&);
62
63 static FloatRect narrowPrecision(double x, double y, double width, double height);
64
location()65 FloatPoint location() const { return m_location; }
size()66 FloatSize size() const { return m_size; }
67
setLocation(const FloatPoint & location)68 void setLocation(const FloatPoint& location) { m_location = location; }
setSize(const FloatSize & size)69 void setSize(const FloatSize& size) { m_size = size; }
70
x()71 float x() const { return m_location.x(); }
y()72 float y() const { return m_location.y(); }
maxX()73 float maxX() const { return x() + width(); }
maxY()74 float maxY() const { return y() + height(); }
width()75 float width() const { return m_size.width(); }
height()76 float height() const { return m_size.height(); }
77
setX(float x)78 void setX(float x) { m_location.setX(x); }
setY(float y)79 void setY(float y) { m_location.setY(y); }
setWidth(float width)80 void setWidth(float width) { m_size.setWidth(width); }
setHeight(float height)81 void setHeight(float height) { m_size.setHeight(height); }
82
isEmpty()83 bool isEmpty() const { return m_size.isEmpty(); }
isZero()84 bool isZero() const { return m_size.isZero(); }
85 bool isExpressibleAsIntRect() const;
86
center()87 FloatPoint center() const { return FloatPoint(x() + width() / 2, y() + height() / 2); }
88
move(const FloatSize & delta)89 void move(const FloatSize& delta) { m_location += delta; }
moveBy(const FloatPoint & delta)90 void moveBy(const FloatPoint& delta) { m_location.move(delta.x(), delta.y()); }
move(float dx,float dy)91 void move(float dx, float dy) { m_location.move(dx, dy); }
92
expand(const FloatSize & size)93 void expand(const FloatSize& size) { m_size += size; }
expand(float dw,float dh)94 void expand(float dw, float dh) { m_size.expand(dw, dh); }
contract(const FloatSize & size)95 void contract(const FloatSize& size) { m_size -= size; }
contract(float dw,float dh)96 void contract(float dw, float dh) { m_size.expand(-dw, -dh); }
97
shiftXEdgeTo(float edge)98 void shiftXEdgeTo(float edge)
99 {
100 float delta = edge - x();
101 setX(edge);
102 setWidth(std::max(0.0f, width() - delta));
103 }
shiftMaxXEdgeTo(float edge)104 void shiftMaxXEdgeTo(float edge)
105 {
106 float delta = edge - maxX();
107 setWidth(std::max(0.0f, width() + delta));
108 }
shiftYEdgeTo(float edge)109 void shiftYEdgeTo(float edge)
110 {
111 float delta = edge - y();
112 setY(edge);
113 setHeight(std::max(0.0f, height() - delta));
114 }
shiftMaxYEdgeTo(float edge)115 void shiftMaxYEdgeTo(float edge)
116 {
117 float delta = edge - maxY();
118 setHeight(std::max(0.0f, height() + delta));
119 }
120
minXMinYCorner()121 FloatPoint minXMinYCorner() const { return m_location; } // typically topLeft
maxXMinYCorner()122 FloatPoint maxXMinYCorner() const { return FloatPoint(m_location.x() + m_size.width(), m_location.y()); } // typically topRight
minXMaxYCorner()123 FloatPoint minXMaxYCorner() const { return FloatPoint(m_location.x(), m_location.y() + m_size.height()); } // typically bottomLeft
maxXMaxYCorner()124 FloatPoint maxXMaxYCorner() const { return FloatPoint(m_location.x() + m_size.width(), m_location.y() + m_size.height()); } // typically bottomRight
125
126 bool intersects(const FloatRect&) const;
127 bool contains(const FloatRect&) const;
128 bool contains(const FloatPoint&, ContainsMode = InsideOrOnStroke) const;
129
130 void intersect(const FloatRect&);
131 void unite(const FloatRect&);
132 void uniteEvenIfEmpty(const FloatRect&);
133 void uniteIfNonZero(const FloatRect&);
134 void extend(const FloatPoint&);
135
136 // Note, this doesn't match what IntRect::contains(IntPoint&) does; the int version
137 // is really checking for containment of 1x1 rect, but that doesn't make sense with floats.
contains(float px,float py)138 bool contains(float px, float py) const
139 {
140 return px >= x() && px <= maxX() && py >= y() && py <= maxY();
141 }
142
inflateX(float dx)143 void inflateX(float dx)
144 {
145 m_location.setX(m_location.x() - dx);
146 m_size.setWidth(m_size.width() + dx + dx);
147 }
inflateY(float dy)148 void inflateY(float dy)
149 {
150 m_location.setY(m_location.y() - dy);
151 m_size.setHeight(m_size.height() + dy + dy);
152 }
inflate(float d)153 void inflate(float d) { inflateX(d); inflateY(d); }
scale(float s)154 void scale(float s) { scale(s, s); }
155 void scale(float sx, float sy);
156
transposedRect()157 FloatRect transposedRect() const { return FloatRect(m_location.transposedPoint(), m_size.transposedSize()); }
158
159 // Re-initializes this rectangle to fit the sets of passed points.
160 void fitToPoints(const FloatPoint& p0, const FloatPoint& p1);
161 void fitToPoints(const FloatPoint& p0, const FloatPoint& p1, const FloatPoint& p2);
162 void fitToPoints(const FloatPoint& p0, const FloatPoint& p1, const FloatPoint& p2, const FloatPoint& p3);
163
164 #if OS(MACOSX)
165 FloatRect(const CGRect&);
166 operator CGRect() const;
167 #if defined(__OBJC__) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
168 FloatRect(const NSRect&);
169 operator NSRect() const;
170 #endif
171 #endif
172
SkRect()173 operator SkRect() const { return SkRect::MakeXYWH(x(), y(), width(), height()); }
174
175 private:
176 FloatPoint m_location;
177 FloatSize m_size;
178
setLocationAndSizeFromEdges(float left,float top,float right,float bottom)179 void setLocationAndSizeFromEdges(float left, float top, float right, float bottom)
180 {
181 m_location.set(left, top);
182 m_size.setWidth(right - left);
183 m_size.setHeight(bottom - top);
184 }
185 };
186
intersection(const FloatRect & a,const FloatRect & b)187 inline FloatRect intersection(const FloatRect& a, const FloatRect& b)
188 {
189 FloatRect c = a;
190 c.intersect(b);
191 return c;
192 }
193
unionRect(const FloatRect & a,const FloatRect & b)194 inline FloatRect unionRect(const FloatRect& a, const FloatRect& b)
195 {
196 FloatRect c = a;
197 c.unite(b);
198 return c;
199 }
200
201 FloatRect unionRect(const Vector<FloatRect>&);
202
203 inline FloatRect& operator+=(FloatRect& a, const FloatRect& b)
204 {
205 a.move(b.x(), b.y());
206 a.setWidth(a.width() + b.width());
207 a.setHeight(a.height() + b.height());
208 return a;
209 }
210
211 inline FloatRect operator+(const FloatRect& a, const FloatRect& b)
212 {
213 FloatRect c = a;
214 c += b;
215 return c;
216 }
217
218 inline bool operator==(const FloatRect& a, const FloatRect& b)
219 {
220 return a.location() == b.location() && a.size() == b.size();
221 }
222
223 inline bool operator!=(const FloatRect& a, const FloatRect& b)
224 {
225 return a.location() != b.location() || a.size() != b.size();
226 }
227
228 PLATFORM_EXPORT IntRect enclosingIntRect(const FloatRect&);
229
230 // Returns a valid IntRect contained within the given FloatRect.
231 PLATFORM_EXPORT IntRect enclosedIntRect(const FloatRect&);
232
233 PLATFORM_EXPORT IntRect roundedIntRect(const FloatRect&);
234
235 // Map supplied rect from srcRect to an equivalent rect in destRect.
236 PLATFORM_EXPORT FloatRect mapRect(const FloatRect&, const FloatRect& srcRect, const FloatRect& destRect);
237
238 }
239
240 #endif
241