1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_UI_RECT 18 #define ANDROID_UI_RECT 19 20 #include <utils/Flattenable.h> 21 #include <utils/Log.h> 22 #include <utils/TypeHelpers.h> 23 #include <log/log.h> 24 25 #include <ui/FloatRect.h> 26 #include <ui/Point.h> 27 28 #include <android/rect.h> 29 30 namespace android { 31 32 class Rect : public ARect, public LightFlattenablePod<Rect> 33 { 34 public: 35 typedef ARect::value_type value_type; 36 37 static const Rect INVALID_RECT; 38 static const Rect EMPTY_RECT; 39 40 // we don't provide copy-ctor and operator= on purpose 41 // because we want the compiler generated versions 42 Rect()43 inline Rect() : Rect(INVALID_RECT) {} 44 45 template <typename T> Rect(T w,T h)46 inline Rect(T w, T h) { 47 if (w > INT32_MAX) { 48 w = INT32_MAX; 49 } 50 if (h > INT32_MAX) { 51 h = INT32_MAX; 52 } 53 left = top = 0; 54 right = static_cast<int32_t>(w); 55 bottom = static_cast<int32_t>(h); 56 } 57 Rect(int32_t l,int32_t t,int32_t r,int32_t b)58 inline Rect(int32_t l, int32_t t, int32_t r, int32_t b) { 59 left = l; 60 top = t; 61 right = r; 62 bottom = b; 63 } 64 Rect(const Point & lt,const Point & rb)65 inline Rect(const Point& lt, const Point& rb) { 66 left = lt.x; 67 top = lt.y; 68 right = rb.x; 69 bottom = rb.y; 70 } 71 72 void makeInvalid(); 73 clear()74 inline void clear() { 75 left = top = right = bottom = 0; 76 } 77 78 // a valid rectangle has a non negative width and height isValid()79 inline bool isValid() const { 80 return (getWidth() >= 0) && (getHeight() >= 0); 81 } 82 83 // an empty rect has a zero width or height, or is invalid isEmpty()84 inline bool isEmpty() const { 85 return (getWidth() <= 0) || (getHeight() <= 0); 86 } 87 88 // rectangle's width getWidth()89 inline int32_t getWidth() const { 90 return right - left; 91 } 92 93 // rectangle's height getHeight()94 inline int32_t getHeight() const { 95 return bottom - top; 96 } 97 getBounds()98 inline Rect getBounds() const { 99 return Rect(right - left, bottom - top); 100 } 101 setLeftTop(const Point & lt)102 void setLeftTop(const Point& lt) { 103 left = lt.x; 104 top = lt.y; 105 } 106 setRightBottom(const Point & rb)107 void setRightBottom(const Point& rb) { 108 right = rb.x; 109 bottom = rb.y; 110 } 111 112 // the following 4 functions return the 4 corners of the rect as Point leftTop()113 Point leftTop() const { 114 return Point(left, top); 115 } rightBottom()116 Point rightBottom() const { 117 return Point(right, bottom); 118 } rightTop()119 Point rightTop() const { 120 return Point(right, top); 121 } leftBottom()122 Point leftBottom() const { 123 return Point(left, bottom); 124 } 125 126 // comparisons 127 inline bool operator == (const Rect& rhs) const { 128 return (left == rhs.left) && (top == rhs.top) && 129 (right == rhs.right) && (bottom == rhs.bottom); 130 } 131 132 inline bool operator != (const Rect& rhs) const { 133 return !operator == (rhs); 134 } 135 136 // operator < defines an order which allows to use rectangles in sorted 137 // vectors. 138 bool operator < (const Rect& rhs) const; 139 140 const Rect operator + (const Point& rhs) const; 141 const Rect operator - (const Point& rhs) const; 142 143 Rect& operator += (const Point& rhs) { 144 return offsetBy(rhs.x, rhs.y); 145 } 146 Rect& operator -= (const Point& rhs) { 147 return offsetBy(-rhs.x, -rhs.y); 148 } 149 offsetToOrigin()150 Rect& offsetToOrigin() { 151 right -= left; 152 bottom -= top; 153 left = top = 0; 154 return *this; 155 } offsetTo(const Point & p)156 Rect& offsetTo(const Point& p) { 157 return offsetTo(p.x, p.y); 158 } offsetBy(const Point & dp)159 Rect& offsetBy(const Point& dp) { 160 return offsetBy(dp.x, dp.y); 161 } 162 163 Rect& offsetTo(int32_t x, int32_t y); 164 Rect& offsetBy(int32_t x, int32_t y); 165 166 bool intersect(const Rect& with, Rect* result) const; 167 168 // Create a new Rect by transforming this one using a graphics HAL 169 // transform. This rectangle is defined in a coordinate space starting at 170 // the origin and extending to (width, height). If the transform includes 171 // a ROT90 then the output rectangle is defined in a space extending to 172 // (height, width). Otherwise the output rectangle is in the same space as 173 // the input. 174 Rect transform(uint32_t xform, int32_t width, int32_t height) const; 175 176 // this calculates (Region(*this) - exclude).bounds() efficiently 177 Rect reduce(const Rect& exclude) const; 178 179 // for backward compatibility width()180 inline int32_t width() const { return getWidth(); } height()181 inline int32_t height() const { return getHeight(); } set(const Rect & rhs)182 inline void set(const Rect& rhs) { operator = (rhs); } 183 toFloatRect()184 FloatRect toFloatRect() const { 185 return {static_cast<float>(left), static_cast<float>(top), 186 static_cast<float>(right), static_cast<float>(bottom)}; 187 } 188 }; 189 190 ANDROID_BASIC_TYPES_TRAITS(Rect) 191 192 }; // namespace android 193 194 #endif // ANDROID_UI_RECT 195