1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Defines a simple integer rectangle class. The containment semantics 6 // are array-like; that is, the coordinate (x, y) is considered to be 7 // contained by the rectangle, but the coordinate (x + width, y) is not. 8 // The class will happily let you create malformed rectangles (that is, 9 // rectangles with negative width and/or height), but there will be assertions 10 // in the operations (such as Contains()) to complain in this case. 11 12 #ifndef UI_GFX_GEOMETRY_RECT_H_ 13 #define UI_GFX_GEOMETRY_RECT_H_ 14 15 #include <cmath> 16 #include <string> 17 18 #include "ui/gfx/geometry/point.h" 19 #include "ui/gfx/geometry/rect_base.h" 20 #include "ui/gfx/geometry/rect_f.h" 21 #include "ui/gfx/geometry/size.h" 22 #include "ui/gfx/geometry/vector2d.h" 23 24 #if defined(OS_WIN) 25 typedef struct tagRECT RECT; 26 #elif defined(OS_IOS) 27 #include <CoreGraphics/CoreGraphics.h> 28 #elif defined(OS_MACOSX) 29 #include <ApplicationServices/ApplicationServices.h> 30 #endif 31 32 namespace gfx { 33 34 class Insets; 35 36 class GFX_EXPORT Rect 37 : public RectBase<Rect, Point, Size, Insets, Vector2d, int> { 38 public: 39 Rect() : RectBase<Rect, Point, Size, Insets, Vector2d, int>(Point()) {} 40 41 Rect(int width, int height) 42 : RectBase<Rect, Point, Size, Insets, Vector2d, int> 43 (Size(width, height)) {} 44 45 Rect(int x, int y, int width, int height) 46 : RectBase<Rect, Point, Size, Insets, Vector2d, int> 47 (Point(x, y), Size(width, height)) {} 48 49 #if defined(OS_WIN) 50 explicit Rect(const RECT& r); 51 #elif defined(OS_MACOSX) 52 explicit Rect(const CGRect& r); 53 #endif 54 55 explicit Rect(const gfx::Size& size) 56 : RectBase<Rect, Point, Size, Insets, Vector2d, int>(size) {} 57 58 Rect(const gfx::Point& origin, const gfx::Size& size) 59 : RectBase<Rect, Point, Size, Insets, Vector2d, int>(origin, size) {} 60 61 ~Rect() {} 62 63 #if defined(OS_WIN) 64 // Construct an equivalent Win32 RECT object. 65 RECT ToRECT() const; 66 #elif defined(OS_MACOSX) 67 // Construct an equivalent CoreGraphics object. 68 CGRect ToCGRect() const; 69 #endif 70 71 operator RectF() const { 72 return RectF(origin().x(), origin().y(), size().width(), size().height()); 73 } 74 75 std::string ToString() const; 76 }; 77 78 inline bool operator==(const Rect& lhs, const Rect& rhs) { 79 return lhs.origin() == rhs.origin() && lhs.size() == rhs.size(); 80 } 81 82 inline bool operator!=(const Rect& lhs, const Rect& rhs) { 83 return !(lhs == rhs); 84 } 85 86 GFX_EXPORT Rect operator+(const Rect& lhs, const Vector2d& rhs); 87 GFX_EXPORT Rect operator-(const Rect& lhs, const Vector2d& rhs); 88 89 inline Rect operator+(const Vector2d& lhs, const Rect& rhs) { 90 return rhs + lhs; 91 } 92 93 GFX_EXPORT Rect IntersectRects(const Rect& a, const Rect& b); 94 GFX_EXPORT Rect UnionRects(const Rect& a, const Rect& b); 95 GFX_EXPORT Rect SubtractRects(const Rect& a, const Rect& b); 96 97 // Constructs a rectangle with |p1| and |p2| as opposite corners. 98 // 99 // This could also be thought of as "the smallest rect that contains both 100 // points", except that we consider points on the right/bottom edges of the 101 // rect to be outside the rect. So technically one or both points will not be 102 // contained within the rect, because they will appear on one of these edges. 103 GFX_EXPORT Rect BoundingRect(const Point& p1, const Point& p2); 104 105 inline Rect ScaleToEnclosingRect(const Rect& rect, 106 float x_scale, 107 float y_scale) { 108 int x = std::floor(rect.x() * x_scale); 109 int y = std::floor(rect.y() * y_scale); 110 int r = rect.width() == 0 ? x : std::ceil(rect.right() * x_scale); 111 int b = rect.height() == 0 ? y : std::ceil(rect.bottom() * y_scale); 112 return Rect(x, y, r - x, b - y); 113 } 114 115 inline Rect ScaleToEnclosingRect(const Rect& rect, float scale) { 116 return ScaleToEnclosingRect(rect, scale, scale); 117 } 118 119 inline Rect ScaleToEnclosedRect(const Rect& rect, 120 float x_scale, 121 float y_scale) { 122 int x = std::ceil(rect.x() * x_scale); 123 int y = std::ceil(rect.y() * y_scale); 124 int r = rect.width() == 0 ? x : std::floor(rect.right() * x_scale); 125 int b = rect.height() == 0 ? y : std::floor(rect.bottom() * y_scale); 126 return Rect(x, y, r - x, b - y); 127 } 128 129 inline Rect ScaleToEnclosedRect(const Rect& rect, float scale) { 130 return ScaleToEnclosedRect(rect, scale, scale); 131 } 132 133 #if !defined(COMPILER_MSVC) 134 extern template class RectBase<Rect, Point, Size, Insets, Vector2d, int>; 135 #endif 136 137 } // namespace gfx 138 139 #endif // UI_GFX_GEOMETRY_RECT_H_ 140