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 <iosfwd> 17 #include <string> 18 19 #include "ui/gfx/geometry/point.h" 20 #include "ui/gfx/geometry/rect_base.h" 21 #include "ui/gfx/geometry/rect_f.h" 22 #include "ui/gfx/geometry/size.h" 23 #include "ui/gfx/geometry/vector2d.h" 24 25 #if defined(OS_WIN) 26 typedef struct tagRECT RECT; 27 #elif defined(OS_IOS) 28 #include <CoreGraphics/CoreGraphics.h> 29 #elif defined(OS_MACOSX) 30 #include <ApplicationServices/ApplicationServices.h> 31 #endif 32 33 namespace gfx { 34 35 class Insets; 36 37 class GFX_EXPORT Rect 38 : public RectBase<Rect, Point, Size, Insets, Vector2d, int> { 39 public: 40 Rect() : RectBase<Rect, Point, Size, Insets, Vector2d, int>(Point()) {} 41 42 Rect(int width, int height) 43 : RectBase<Rect, Point, Size, Insets, Vector2d, int> 44 (Size(width, height)) {} 45 46 Rect(int x, int y, int width, int height) 47 : RectBase<Rect, Point, Size, Insets, Vector2d, int> 48 (Point(x, y), Size(width, height)) {} 49 50 #if defined(OS_WIN) 51 explicit Rect(const RECT& r); 52 #elif defined(OS_MACOSX) 53 explicit Rect(const CGRect& r); 54 #endif 55 56 explicit Rect(const gfx::Size& size) 57 : RectBase<Rect, Point, Size, Insets, Vector2d, int>(size) {} 58 59 Rect(const gfx::Point& origin, const gfx::Size& size) 60 : RectBase<Rect, Point, Size, Insets, Vector2d, int>(origin, size) {} 61 62 ~Rect() {} 63 64 #if defined(OS_WIN) 65 // Construct an equivalent Win32 RECT object. 66 RECT ToRECT() const; 67 #elif defined(OS_MACOSX) 68 // Construct an equivalent CoreGraphics object. 69 CGRect ToCGRect() const; 70 #endif 71 72 operator RectF() const { 73 return RectF(origin().x(), origin().y(), size().width(), size().height()); 74 } 75 76 std::string ToString() const; 77 }; 78 79 inline bool operator==(const Rect& lhs, const Rect& rhs) { 80 return lhs.origin() == rhs.origin() && lhs.size() == rhs.size(); 81 } 82 83 inline bool operator!=(const Rect& lhs, const Rect& rhs) { 84 return !(lhs == rhs); 85 } 86 87 GFX_EXPORT Rect operator+(const Rect& lhs, const Vector2d& rhs); 88 GFX_EXPORT Rect operator-(const Rect& lhs, const Vector2d& rhs); 89 90 inline Rect operator+(const Vector2d& lhs, const Rect& rhs) { 91 return rhs + lhs; 92 } 93 94 GFX_EXPORT Rect IntersectRects(const Rect& a, const Rect& b); 95 GFX_EXPORT Rect UnionRects(const Rect& a, const Rect& b); 96 GFX_EXPORT Rect SubtractRects(const Rect& a, const Rect& b); 97 98 // Constructs a rectangle with |p1| and |p2| as opposite corners. 99 // 100 // This could also be thought of as "the smallest rect that contains both 101 // points", except that we consider points on the right/bottom edges of the 102 // rect to be outside the rect. So technically one or both points will not be 103 // contained within the rect, because they will appear on one of these edges. 104 GFX_EXPORT Rect BoundingRect(const Point& p1, const Point& p2); 105 106 inline Rect ScaleToEnclosingRect(const Rect& rect, 107 float x_scale, 108 float y_scale) { 109 int x = std::floor(rect.x() * x_scale); 110 int y = std::floor(rect.y() * y_scale); 111 int r = rect.width() == 0 ? x : std::ceil(rect.right() * x_scale); 112 int b = rect.height() == 0 ? y : std::ceil(rect.bottom() * y_scale); 113 return Rect(x, y, r - x, b - y); 114 } 115 116 inline Rect ScaleToEnclosingRect(const Rect& rect, float scale) { 117 return ScaleToEnclosingRect(rect, scale, scale); 118 } 119 120 inline Rect ScaleToEnclosedRect(const Rect& rect, 121 float x_scale, 122 float y_scale) { 123 int x = std::ceil(rect.x() * x_scale); 124 int y = std::ceil(rect.y() * y_scale); 125 int r = rect.width() == 0 ? x : std::floor(rect.right() * x_scale); 126 int b = rect.height() == 0 ? y : std::floor(rect.bottom() * y_scale); 127 return Rect(x, y, r - x, b - y); 128 } 129 130 inline Rect ScaleToEnclosedRect(const Rect& rect, float scale) { 131 return ScaleToEnclosedRect(rect, scale, scale); 132 } 133 134 #if !defined(COMPILER_MSVC) && !defined(__native_client__) 135 extern template class RectBase<Rect, Point, Size, Insets, Vector2d, int>; 136 #endif 137 138 // This is declared here for use in gtest-based unit tests but is defined in 139 // the gfx_test_support target. Depend on that to use this in your unit test. 140 // This should not be used in production code - call ToString() instead. 141 void PrintTo(const Rect& rect, ::std::ostream* os); 142 143 } // namespace gfx 144 145 #endif // UI_GFX_GEOMETRY_RECT_H_ 146