1 /* 2 * Copyright (c) 2013, Opera Software ASA. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Opera Software ASA nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef BorderImageLength_h 32 #define BorderImageLength_h 33 34 #include "platform/Length.h" 35 36 namespace WebCore { 37 38 // Represents an individual computed border image width or outset. 39 // 40 // http://www.w3.org/TR/css3-background/#border-image-width 41 // http://www.w3.org/TR/css3-background/#border-image-outset 42 class BorderImageLength { 43 public: BorderImageLength(double number)44 BorderImageLength(double number) 45 : m_length(Undefined) 46 , m_number(number) 47 , m_type(NumberType) 48 { 49 } 50 BorderImageLength(const Length & length)51 BorderImageLength(const Length& length) 52 : m_length(length) 53 , m_number(0) 54 , m_type(LengthType) 55 { 56 } 57 isNumber()58 bool isNumber() const { return m_type == NumberType; } isLength()59 bool isLength() const { return m_type == LengthType; } 60 length()61 const Length& length() const { ASSERT(isLength()); return m_length; } length()62 Length& length() { ASSERT(isLength()); return m_length; } 63 number()64 double number() const { ASSERT(isNumber()); return m_number; } 65 66 bool operator==(const BorderImageLength& other) const 67 { 68 return m_type == other.m_type && m_length == other.m_length && m_number == other.m_number; 69 } 70 isZero()71 bool isZero() const 72 { 73 return (isLength() && m_length.isZero()) || (isNumber() && m_number); 74 } 75 76 private: 77 // Ideally we would put the 2 following fields in a union, but Length has a constructor, 78 // a destructor and a copy assignment which isn't allowed. 79 Length m_length; 80 double m_number; 81 enum { 82 LengthType, 83 NumberType 84 } m_type; 85 }; 86 87 } // namespace WebCore 88 89 #endif // BorderImageLength_h 90