1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 #ifndef _BGFX_RANGE_BASICBOX_HXX 25 #define _BGFX_RANGE_BASICBOX_HXX 26 27 #include <basegfx/range/basicrange.hxx> 28 29 30 namespace basegfx 31 { 32 /** Specialization of BasicRange, handling the inside predicates 33 differently. 34 35 This template considers the rightmost and bottommost border as 36 <em>outside</em> of the range, in contrast to BasicRange, 37 which considers them inside. 38 */ 39 class BasicBox : public BasicRange< sal_Int32, Int32Traits > 40 { 41 typedef BasicRange< sal_Int32, Int32Traits > Base; 42 public: BasicBox()43 BasicBox() : 44 Base() 45 { 46 } 47 BasicBox(sal_Int32 nValue)48 BasicBox( sal_Int32 nValue ) : 49 Base( nValue ) 50 { 51 } 52 BasicBox(const BasicBox & rBox)53 BasicBox(const BasicBox& rBox) : 54 Base( rBox ) 55 { 56 } 57 getCenter() const58 double getCenter() const 59 { 60 if(isEmpty()) 61 { 62 return 0.0; 63 } 64 else 65 { 66 return ((mnMaximum + mnMinimum - 1.0) / 2.0); 67 } 68 } 69 70 using Base::isInside; 71 isInside(sal_Int32 nValue) const72 bool isInside(sal_Int32 nValue) const 73 { 74 if(isEmpty()) 75 { 76 return false; 77 } 78 else 79 { 80 return (nValue >= mnMinimum) && (nValue < mnMaximum); 81 } 82 } 83 84 using Base::overlaps; 85 overlaps(const BasicBox & rBox) const86 bool overlaps(const BasicBox& rBox) const 87 { 88 if(isEmpty()) 89 { 90 return false; 91 } 92 else 93 { 94 if(rBox.isEmpty()) 95 { 96 return false; 97 } 98 else 99 { 100 return !((rBox.mnMaximum <= mnMinimum) || (rBox.mnMinimum >= mnMaximum)); 101 } 102 } 103 } 104 grow(sal_Int32 nValue)105 void grow(sal_Int32 nValue) 106 { 107 if(!isEmpty()) 108 { 109 bool bLessThanZero(nValue < 0); 110 111 if(nValue > 0 || bLessThanZero) 112 { 113 mnMinimum -= nValue; 114 mnMaximum += nValue; 115 116 if(bLessThanZero) 117 { 118 // test if range did collapse 119 if(mnMinimum > mnMaximum) 120 { 121 // if yes, collapse to center 122 mnMinimum = mnMaximum = ((mnMaximum + mnMinimum - 1) / 2); 123 } 124 } 125 } 126 } 127 } 128 }; 129 130 } // end of namespace basegfx 131 132 #endif /* _BGFX_RANGE_BASICBOX_HXX */ 133