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 "wtf/Vector.h"
32
33 #if OS(MACOSX)
34 typedef struct CGRect CGRect;
35 #ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES
36 typedef struct CGRect NSRect;
37 #else
38 typedef struct _NSRect NSRect;
39 #endif
40 #endif
41
42 struct SkRect;
43
44 namespace WebCore {
45
46 class LayoutRect;
47 class IntRect;
48 class IntPoint;
49
50 class PLATFORM_EXPORT FloatRect {
51 public:
52 enum ContainsMode {
53 InsideOrOnStroke,
54 InsideButNotOnStroke
55 };
56
FloatRect()57 FloatRect() { }
FloatRect(const FloatPoint & location,const FloatSize & size)58 FloatRect(const FloatPoint& location, const FloatSize& size)
59 : m_location(location), m_size(size) { }
FloatRect(float x,float y,float width,float height)60 FloatRect(float x, float y, float width, float height)
61 : m_location(FloatPoint(x, y)), m_size(FloatSize(width, height)) { }
62 FloatRect(const IntRect&);
63 FloatRect(const LayoutRect&);
64 FloatRect(const SkRect&);
65
66 static FloatRect narrowPrecision(double x, double y, double width, double height);
67
location()68 FloatPoint location() const { return m_location; }
size()69 FloatSize size() const { return m_size; }
70
setLocation(const FloatPoint & location)71 void setLocation(const FloatPoint& location) { m_location = location; }
setSize(const FloatSize & size)72 void setSize(const FloatSize& size) { m_size = size; }
73
x()74 float x() const { return m_location.x(); }
y()75 float y() const { return m_location.y(); }
maxX()76 float maxX() const { return x() + width(); }
maxY()77 float maxY() const { return y() + height(); }
width()78 float width() const { return m_size.width(); }
height()79 float height() const { return m_size.height(); }
80
setX(float x)81 void setX(float x) { m_location.setX(x); }
setY(float y)82 void setY(float y) { m_location.setY(y); }
setWidth(float width)83 void setWidth(float width) { m_size.setWidth(width); }
setHeight(float height)84 void setHeight(float height) { m_size.setHeight(height); }
85
isEmpty()86 bool isEmpty() const { return m_size.isEmpty(); }
isZero()87 bool isZero() const { return m_size.isZero(); }
88 bool isExpressibleAsIntRect() const;
89
center()90 FloatPoint center() const { return FloatPoint(x() + width() / 2, y() + height() / 2); }
91
move(const FloatSize & delta)92 void move(const FloatSize& delta) { m_location += delta; }
moveBy(const FloatPoint & delta)93 void moveBy(const FloatPoint& delta) { m_location.move(delta.x(), delta.y()); }
move(float dx,float dy)94 void move(float dx, float dy) { m_location.move(dx, dy); }
95
expand(const FloatSize & size)96 void expand(const FloatSize& size) { m_size += size; }
expand(float dw,float dh)97 void expand(float dw, float dh) { m_size.expand(dw, dh); }
contract(const FloatSize & size)98 void contract(const FloatSize& size) { m_size -= size; }
contract(float dw,float dh)99 void contract(float dw, float dh) { m_size.expand(-dw, -dh); }
100
shiftXEdgeTo(float edge)101 void shiftXEdgeTo(float edge)
102 {
103 float delta = edge - x();
104 setX(edge);
105 setWidth(std::max(0.0f, width() - delta));
106 }
shiftMaxXEdgeTo(float edge)107 void shiftMaxXEdgeTo(float edge)
108 {
109 float delta = edge - maxX();
110 setWidth(std::max(0.0f, width() + delta));
111 }
shiftYEdgeTo(float edge)112 void shiftYEdgeTo(float edge)
113 {
114 float delta = edge - y();
115 setY(edge);
116 setHeight(std::max(0.0f, height() - delta));
117 }
shiftMaxYEdgeTo(float edge)118 void shiftMaxYEdgeTo(float edge)
119 {
120 float delta = edge - maxY();
121 setHeight(std::max(0.0f, height() + delta));
122 }
123
minXMinYCorner()124 FloatPoint minXMinYCorner() const { return m_location; } // typically topLeft
maxXMinYCorner()125 FloatPoint maxXMinYCorner() const { return FloatPoint(m_location.x() + m_size.width(), m_location.y()); } // typically topRight
minXMaxYCorner()126 FloatPoint minXMaxYCorner() const { return FloatPoint(m_location.x(), m_location.y() + m_size.height()); } // typically bottomLeft
maxXMaxYCorner()127 FloatPoint maxXMaxYCorner() const { return FloatPoint(m_location.x() + m_size.width(), m_location.y() + m_size.height()); } // typically bottomRight
128
129 bool intersects(const FloatRect&) const;
130 bool contains(const FloatRect&) const;
131 bool contains(const FloatPoint&, ContainsMode = InsideOrOnStroke) const;
132
133 void intersect(const FloatRect&);
134 void unite(const FloatRect&);
135 void uniteEvenIfEmpty(const FloatRect&);
136 void uniteIfNonZero(const FloatRect&);
137 void extend(const FloatPoint&);
138
139 // Note, this doesn't match what IntRect::contains(IntPoint&) does; the int version
140 // is really checking for containment of 1x1 rect, but that doesn't make sense with floats.
contains(float px,float py)141 bool contains(float px, float py) const
142 {
143 return px >= x() && px <= maxX() && py >= y() && py <= maxY();
144 }
145
inflateX(float dx)146 void inflateX(float dx)
147 {
148 m_location.setX(m_location.x() - dx);
149 m_size.setWidth(m_size.width() + dx + dx);
150 }
inflateY(float dy)151 void inflateY(float dy)
152 {
153 m_location.setY(m_location.y() - dy);
154 m_size.setHeight(m_size.height() + dy + dy);
155 }
inflate(float d)156 void inflate(float d) { inflateX(d); inflateY(d); }
scale(float s)157 void scale(float s) { scale(s, s); }
158 void scale(float sx, float sy);
159
transposedRect()160 FloatRect transposedRect() const { return FloatRect(m_location.transposedPoint(), m_size.transposedSize()); }
161
162 // Re-initializes this rectangle to fit the sets of passed points.
163 void fitToPoints(const FloatPoint& p0, const FloatPoint& p1);
164 void fitToPoints(const FloatPoint& p0, const FloatPoint& p1, const FloatPoint& p2);
165 void fitToPoints(const FloatPoint& p0, const FloatPoint& p1, const FloatPoint& p2, const FloatPoint& p3);
166
167 #if OS(MACOSX)
168 FloatRect(const CGRect&);
169 operator CGRect() const;
170 #if !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
171 FloatRect(const NSRect&);
172 operator NSRect() const;
173 #endif
174 #endif
175
176 operator SkRect() const;
177
178 private:
179 FloatPoint m_location;
180 FloatSize m_size;
181
setLocationAndSizeFromEdges(float left,float top,float right,float bottom)182 void setLocationAndSizeFromEdges(float left, float top, float right, float bottom)
183 {
184 m_location.set(left, top);
185 m_size.setWidth(right - left);
186 m_size.setHeight(bottom - top);
187 }
188 };
189
intersection(const FloatRect & a,const FloatRect & b)190 inline FloatRect intersection(const FloatRect& a, const FloatRect& b)
191 {
192 FloatRect c = a;
193 c.intersect(b);
194 return c;
195 }
196
unionRect(const FloatRect & a,const FloatRect & b)197 inline FloatRect unionRect(const FloatRect& a, const FloatRect& b)
198 {
199 FloatRect c = a;
200 c.unite(b);
201 return c;
202 }
203
204 FloatRect unionRect(const Vector<FloatRect>&);
205
206 inline FloatRect& operator+=(FloatRect& a, const FloatRect& b)
207 {
208 a.move(b.x(), b.y());
209 a.setWidth(a.width() + b.width());
210 a.setHeight(a.height() + b.height());
211 return a;
212 }
213
214 inline FloatRect operator+(const FloatRect& a, const FloatRect& b)
215 {
216 FloatRect c = a;
217 c += b;
218 return c;
219 }
220
221 inline bool operator==(const FloatRect& a, const FloatRect& b)
222 {
223 return a.location() == b.location() && a.size() == b.size();
224 }
225
226 inline bool operator!=(const FloatRect& a, const FloatRect& b)
227 {
228 return a.location() != b.location() || a.size() != b.size();
229 }
230
231 PLATFORM_EXPORT IntRect enclosingIntRect(const FloatRect&);
232
233 // Returns a valid IntRect contained within the given FloatRect.
234 PLATFORM_EXPORT IntRect enclosedIntRect(const FloatRect&);
235
236 PLATFORM_EXPORT IntRect roundedIntRect(const FloatRect&);
237
238 // Map supplied rect from srcRect to an equivalent rect in destRect.
239 PLATFORM_EXPORT FloatRect mapRect(const FloatRect&, const FloatRect& srcRect, const FloatRect& destRect);
240
241 }
242
243 #endif
244