Home | History | Annotate | Download | only in ui 
      1 /*
      2  * Copyright (C) 2009 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 #include <ui/Rect.h>
     18 
     19 namespace android {
     20 
     21 static inline int32_t min(int32_t a, int32_t b) {
     22     return (a<b) ? a : b;
     23 }
     24 
     25 static inline int32_t max(int32_t a, int32_t b) {
     26     return (a>b) ? a : b;
     27 }
     28 
     29 void Rect::makeInvalid() {
     30     left = 0;
     31     top = 0;
     32     right = -1;
     33     bottom = -1;
     34 }
     35 
     36 bool Rect::operator < (const Rect& rhs) const
     37 {
     38     if (top<rhs.top) {
     39         return true;
     40     } else if (top == rhs.top) {
     41         if (left < rhs.left) {
     42             return true;
     43         } else if (left == rhs.left) {
     44             if (bottom<rhs.bottom) {
     45                 return true;
     46             } else if (bottom == rhs.bottom) {
     47                 if (right<rhs.right) {
     48                     return true;
     49                 }
     50             }
     51         }
     52     }
     53     return false;
     54 }
     55 
     56 Rect& Rect::offsetTo(int32_t x, int32_t y)
     57 {
     58     right -= left - x;
     59     bottom -= top - y;
     60     left = x;
     61     top = y;
     62     return *this;
     63 }
     64 
     65 Rect& Rect::offsetBy(int32_t x, int32_t y)
     66 {
     67     left += x;
     68     top  += y;
     69     right+= x;
     70     bottom+=y;
     71     return *this;
     72 }
     73 
     74 const Rect Rect::operator + (const Point& rhs) const
     75 {
     76     const Rect result(left+rhs.x, top+rhs.y, right+rhs.x, bottom+rhs.y);
     77     return result;
     78 }
     79 
     80 const Rect Rect::operator - (const Point& rhs) const
     81 {
     82     const Rect result(left-rhs.x, top-rhs.y, right-rhs.x, bottom-rhs.y);
     83     return result;
     84 }
     85 
     86 bool Rect::intersect(const Rect& with, Rect* result) const
     87 {
     88     result->left    = max(left, with.left);
     89     result->top     = max(top, with.top);
     90     result->right   = min(right, with.right);
     91     result->bottom  = min(bottom, with.bottom);
     92     return !(result->isEmpty());
     93 }
     94 
     95 }; // namespace android
     96