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 WebCore {
43
44 class LayoutRect;
45 class IntRect;
46 class IntPoint;
47
48 class PLATFORM_EXPORT FloatRect {
49 public:
50 enum ContainsMode {
51 InsideOrOnStroke,
52 InsideButNotOnStroke
53 };
54
FloatRect()55 FloatRect() { }
FloatRect(const FloatPoint & location,const FloatSize & size)56 FloatRect(const FloatPoint& location, const FloatSize& size)
57 : m_location(location), m_size(size) { }
FloatRect(float x,float y,float width,float height)58 FloatRect(float x, float y, float width, float height)
59 : m_location(FloatPoint(x, y)), m_size(FloatSize(width, height)) { }
60 FloatRect(const IntRect&);
61 FloatRect(const LayoutRect&);
62 FloatRect(const SkRect&);
63
64 static FloatRect narrowPrecision(double x, double y, double width, double height);
65
location()66 FloatPoint location() const { return m_location; }
size()67 FloatSize size() const { return m_size; }
68
setLocation(const FloatPoint & location)69 void setLocation(const FloatPoint& location) { m_location = location; }
setSize(const FloatSize & size)70 void setSize(const FloatSize& size) { m_size = size; }
71
x()72 float x() const { return m_location.x(); }
y()73 float y() const { return m_location.y(); }
maxX()74 float maxX() const { return x() + width(); }
maxY()75 float maxY() const { return y() + height(); }
width()76 float width() const { return m_size.width(); }
height()77 float height() const { return m_size.height(); }
78
setX(float x)79 void setX(float x) { m_location.setX(x); }
setY(float y)80 void setY(float y) { m_location.setY(y); }
setWidth(float width)81 void setWidth(float width) { m_size.setWidth(width); }
setHeight(float height)82 void setHeight(float height) { m_size.setHeight(height); }
83
isEmpty()84 bool isEmpty() const { return m_size.isEmpty(); }
isZero()85 bool isZero() const { return m_size.isZero(); }
86 bool isExpressibleAsIntRect() const;
87
center()88 FloatPoint center() const { return FloatPoint(x() + width() / 2, y() + height() / 2); }
89
move(const FloatSize & delta)90 void move(const FloatSize& delta) { m_location += delta; }
moveBy(const FloatPoint & delta)91 void moveBy(const FloatPoint& delta) { m_location.move(delta.x(), delta.y()); }
move(float dx,float dy)92 void move(float dx, float dy) { m_location.move(dx, dy); }
93
expand(const FloatSize & size)94 void expand(const FloatSize& size) { m_size += size; }
expand(float dw,float dh)95 void expand(float dw, float dh) { m_size.expand(dw, dh); }
contract(const FloatSize & size)96 void contract(const FloatSize& size) { m_size -= size; }
contract(float dw,float dh)97 void contract(float dw, float dh) { m_size.expand(-dw, -dh); }
98
shiftXEdgeTo(float edge)99 void shiftXEdgeTo(float edge)
100 {
101 float delta = edge - x();
102 setX(edge);
103 setWidth(std::max(0.0f, width() - delta));
104 }
shiftMaxXEdgeTo(float edge)105 void shiftMaxXEdgeTo(float edge)
106 {
107 float delta = edge - maxX();
108 setWidth(std::max(0.0f, width() + delta));
109 }
shiftYEdgeTo(float edge)110 void shiftYEdgeTo(float edge)
111 {
112 float delta = edge - y();
113 setY(edge);
114 setHeight(std::max(0.0f, height() - delta));
115 }
shiftMaxYEdgeTo(float edge)116 void shiftMaxYEdgeTo(float edge)
117 {
118 float delta = edge - maxY();
119 setHeight(std::max(0.0f, height() + delta));
120 }
121
minXMinYCorner()122 FloatPoint minXMinYCorner() const { return m_location; } // typically topLeft
maxXMinYCorner()123 FloatPoint maxXMinYCorner() const { return FloatPoint(m_location.x() + m_size.width(), m_location.y()); } // typically topRight
minXMaxYCorner()124 FloatPoint minXMaxYCorner() const { return FloatPoint(m_location.x(), m_location.y() + m_size.height()); } // typically bottomLeft
maxXMaxYCorner()125 FloatPoint maxXMaxYCorner() const { return FloatPoint(m_location.x() + m_size.width(), m_location.y() + m_size.height()); } // typically bottomRight
126
127 bool intersects(const FloatRect&) const;
128 bool contains(const FloatRect&) const;
129 bool contains(const FloatPoint&, ContainsMode = InsideOrOnStroke) const;
130
131 void intersect(const FloatRect&);
132 void unite(const FloatRect&);
133 void uniteEvenIfEmpty(const FloatRect&);
134 void uniteIfNonZero(const FloatRect&);
135 void extend(const FloatPoint&);
136
137 // Note, this doesn't match what IntRect::contains(IntPoint&) does; the int version
138 // is really checking for containment of 1x1 rect, but that doesn't make sense with floats.
contains(float px,float py)139 bool contains(float px, float py) const
140 {
141 return px >= x() && px <= maxX() && py >= y() && py <= maxY();
142 }
143
inflateX(float dx)144 void inflateX(float dx)
145 {
146 m_location.setX(m_location.x() - dx);
147 m_size.setWidth(m_size.width() + dx + dx);
148 }
inflateY(float dy)149 void inflateY(float dy)
150 {
151 m_location.setY(m_location.y() - dy);
152 m_size.setHeight(m_size.height() + dy + dy);
153 }
inflate(float d)154 void inflate(float d) { inflateX(d); inflateY(d); }
scale(float s)155 void scale(float s) { scale(s, s); }
156 void scale(float sx, float sy);
157
transposedRect()158 FloatRect transposedRect() const { return FloatRect(m_location.transposedPoint(), m_size.transposedSize()); }
159
160 // Re-initializes this rectangle to fit the sets of passed points.
161 void fitToPoints(const FloatPoint& p0, const FloatPoint& p1);
162 void fitToPoints(const FloatPoint& p0, const FloatPoint& p1, const FloatPoint& p2);
163 void fitToPoints(const FloatPoint& p0, const FloatPoint& p1, const FloatPoint& p2, const FloatPoint& p3);
164
165 #if OS(MACOSX)
166 FloatRect(const CGRect&);
167 operator CGRect() const;
168 #if defined(__OBJC__) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
169 FloatRect(const NSRect&);
170 operator NSRect() const;
171 #endif
172 #endif
173
SkRect()174 operator SkRect() const { return SkRect::MakeXYWH(x(), y(), width(), height()); }
175
176 private:
177 FloatPoint m_location;
178 FloatSize m_size;
179
setLocationAndSizeFromEdges(float left,float top,float right,float bottom)180 void setLocationAndSizeFromEdges(float left, float top, float right, float bottom)
181 {
182 m_location.set(left, top);
183 m_size.setWidth(right - left);
184 m_size.setHeight(bottom - top);
185 }
186 };
187
intersection(const FloatRect & a,const FloatRect & b)188 inline FloatRect intersection(const FloatRect& a, const FloatRect& b)
189 {
190 FloatRect c = a;
191 c.intersect(b);
192 return c;
193 }
194
unionRect(const FloatRect & a,const FloatRect & b)195 inline FloatRect unionRect(const FloatRect& a, const FloatRect& b)
196 {
197 FloatRect c = a;
198 c.unite(b);
199 return c;
200 }
201
202 FloatRect unionRect(const Vector<FloatRect>&);
203
204 inline FloatRect& operator+=(FloatRect& a, const FloatRect& b)
205 {
206 a.move(b.x(), b.y());
207 a.setWidth(a.width() + b.width());
208 a.setHeight(a.height() + b.height());
209 return a;
210 }
211
212 inline FloatRect operator+(const FloatRect& a, const FloatRect& b)
213 {
214 FloatRect c = a;
215 c += b;
216 return c;
217 }
218
219 inline bool operator==(const FloatRect& a, const FloatRect& b)
220 {
221 return a.location() == b.location() && a.size() == b.size();
222 }
223
224 inline bool operator!=(const FloatRect& a, const FloatRect& b)
225 {
226 return a.location() != b.location() || a.size() != b.size();
227 }
228
229 PLATFORM_EXPORT IntRect enclosingIntRect(const FloatRect&);
230
231 // Returns a valid IntRect contained within the given FloatRect.
232 PLATFORM_EXPORT IntRect enclosedIntRect(const FloatRect&);
233
234 PLATFORM_EXPORT IntRect roundedIntRect(const FloatRect&);
235
236 // Map supplied rect from srcRect to an equivalent rect in destRect.
237 PLATFORM_EXPORT FloatRect mapRect(const FloatRect&, const FloatRect& srcRect, const FloatRect& destRect);
238
239 }
240
241 #endif
242