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FloatRect.h

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00001 /*
00002  * Copyright (C) 2003, 2006, 2007 Apple Inc.  All rights reserved.
00003  * Copyright (C) 2005 Nokia.  All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  *
00014  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
00015  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00016  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
00017  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
00018  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00019  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00020  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00021  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
00022  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00023  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00024  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00025  */
00026 
00027 #ifndef FloatRect_h
00028 #define FloatRect_h
00029 
00030 #include "FloatPoint.h"
00031 #include "IntRect.h"
00032 
00033 #if PLATFORM(CG)
00034 typedef struct CGRect CGRect;
00035 #endif
00036 
00037 #if PLATFORM(MAC)
00038 #ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES
00039 typedef struct CGRect NSRect;
00040 #else
00041 typedef struct _NSRect NSRect;
00042 #endif
00043 #endif
00044 
00045 #if PLATFORM(QT)
00046 QT_BEGIN_NAMESPACE
00047 class QRectF;
00048 QT_END_NAMESPACE
00049 #endif
00050 
00051 #if PLATFORM(WX) && USE(WXGC)
00052 class wxRect2DDouble;
00053 #endif
00054 
00055 namespace WebCore {
00056 
00057 class IntRect;
00058 
00059 class FloatRect {
00060 public:
00061     FloatRect() { }
00062     FloatRect(const FloatPoint& location, const FloatSize& size)
00063         : m_location(location), m_size(size) { }
00064     FloatRect(float x, float y, float width, float height)
00065         : m_location(FloatPoint(x, y)), m_size(FloatSize(width, height)) { }
00066     FloatRect(const IntRect&);
00067 
00068     static FloatRect narrowPrecision(double x, double y, double width, double height);
00069 
00070     FloatPoint location() const { return m_location; }
00071     FloatSize size() const { return m_size; }
00072 
00073     void setLocation(const FloatPoint& location) { m_location = location; }
00074     void setSize(const FloatSize& size) { m_size = size; }
00075 
00076     float x() const { return m_location.x(); }
00077     float y() const { return m_location.y(); }
00078     float width() const { return m_size.width(); }
00079     float height() const { return m_size.height(); }
00080 
00081     void setX(float x) { m_location.setX(x); }
00082     void setY(float y) { m_location.setY(y); }
00083     void setWidth(float width) { m_size.setWidth(width); }
00084     void setHeight(float height) { m_size.setHeight(height); }
00085 
00086     bool isEmpty() const { return m_size.isEmpty(); }
00087 
00088     float right() const { return x() + width(); }
00089     float bottom() const { return y() + height(); }
00090 
00091     void move(const FloatSize& delta) { m_location += delta; } 
00092     void move(float dx, float dy) { m_location.move(dx, dy); } 
00093 
00094     bool intersects(const FloatRect&) const;
00095     bool contains(const FloatRect&) const;
00096 
00097     void intersect(const FloatRect&);
00098     void unite(const FloatRect&);
00099 
00100     // Note, this doesn't match what IntRect::contains(IntPoint&) does; the int version
00101     // is really checking for containment of 1x1 rect, but that doesn't make sense with floats.
00102     bool contains(float px, float py) const
00103         { return px >= x() && px <= right() && py >= y() && py <= bottom(); }
00104     bool contains(const FloatPoint& point) const { return contains(point.x(), point.y()); }
00105 
00106 
00107     void inflateX(float dx) {
00108         m_location.setX(m_location.x() - dx);
00109         m_size.setWidth(m_size.width() + dx + dx);
00110     }
00111     void inflateY(float dy) {
00112         m_location.setY(m_location.y() - dy);
00113         m_size.setHeight(m_size.height() + dy + dy);
00114     }
00115     void inflate(float d) { inflateX(d); inflateY(d); }
00116     void scale(float s);
00117 
00118 #if PLATFORM(CG)
00119     FloatRect(const CGRect&);
00120     operator CGRect() const;
00121 #endif
00122 
00123 #if PLATFORM(MAC) && !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
00124     FloatRect(const NSRect&);
00125     operator NSRect() const;
00126 #endif
00127 
00128 #if PLATFORM(QT)
00129     FloatRect(const QRectF&);
00130     operator QRectF() const;
00131 #endif
00132 #if PLATFORM(SYMBIAN)
00133     FloatRect(const TRect&);
00134     operator TRect() const;
00135     TRect rect() const;
00136 #endif
00137 
00138 #if PLATFORM(WX) && USE(WXGC)
00139     FloatRect(const wxRect2DDouble&);
00140     operator wxRect2DDouble() const;
00141 #endif
00142 
00143 private:
00144     FloatPoint m_location;
00145     FloatSize m_size;
00146 };
00147 
00148 inline FloatRect intersection(const FloatRect& a, const FloatRect& b)
00149 {
00150     FloatRect c = a;
00151     c.intersect(b);
00152     return c;
00153 }
00154 
00155 inline FloatRect unionRect(const FloatRect& a, const FloatRect& b)
00156 {
00157     FloatRect c = a;
00158     c.unite(b);
00159     return c;
00160 }
00161 
00162 inline bool operator==(const FloatRect& a, const FloatRect& b)
00163 {
00164     return a.location() == b.location() && a.size() == b.size();
00165 }
00166 
00167 inline bool operator!=(const FloatRect& a, const FloatRect& b)
00168 {
00169     return a.location() != b.location() || a.size() != b.size();
00170 }
00171 
00172 IntRect enclosingIntRect(const FloatRect&);
00173 
00174 }
00175 
00176 #endif

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