1 /* 2 * Copyright (C) 2013 Google Inc. 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 Google Inc. 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 StyleColor_h 32 #define StyleColor_h 33 34 #include "platform/graphics/Color.h" 35 36 namespace blink { 37 38 class StyleColor { 39 public: 40 StyleColor(Color color) : m_color(color), m_currentColor(false) { } 41 static StyleColor currentColor() { return StyleColor(); } 42 43 bool isCurrentColor() const { return m_currentColor; } 44 Color color() const { ASSERT(!isCurrentColor()); return m_color; } 45 46 Color resolve(Color currentColor) const { return m_currentColor ? currentColor : m_color; } 47 48 private: 49 StyleColor() : m_currentColor(true) { } 50 Color m_color; 51 bool m_currentColor; 52 }; 53 54 inline bool operator==(const StyleColor& a, const StyleColor& b) 55 { 56 if (a.isCurrentColor() || b.isCurrentColor()) 57 return a.isCurrentColor() && b.isCurrentColor(); 58 return a.color() == b.color(); 59 } 60 61 inline bool operator!=(const StyleColor& a, const StyleColor& b) 62 { 63 return !(a == b); 64 } 65 66 67 } // namespace blink 68 69 #endif // StyleColor_h 70
