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 #include "config.h" 32 #include "core/animation/AnimatableValue.h" 33 #include "core/animation/AnimatableNeutral.h" 34 #include <algorithm> 35 36 namespace WebCore { 37 38 const AnimatableValue* AnimatableValue::neutralValue() 39 { 40 static AnimatableNeutral* neutralSentinelValue = AnimatableNeutral::create().leakRef(); 41 return neutralSentinelValue; 42 } 43 44 PassRefPtr<AnimatableValue> AnimatableValue::interpolate(const AnimatableValue* left, const AnimatableValue* right, double fraction) 45 { 46 ASSERT(left); 47 ASSERT(right); 48 ASSERT(!left->isNeutral()); 49 ASSERT(!right->isNeutral()); 50 51 if (fraction && fraction != 1 && left->isSameType(right)) 52 return left->interpolateTo(right, fraction); 53 54 return defaultInterpolateTo(left, right, fraction); 55 } 56 57 PassRefPtr<AnimatableValue> AnimatableValue::add(const AnimatableValue* left, const AnimatableValue* right) 58 { 59 ASSERT(left); 60 ASSERT(right); 61 62 if (left->isNeutral()) 63 return takeConstRef(right); 64 if (right->isNeutral()) 65 return takeConstRef(left); 66 67 if (left->isSameType(right)) 68 return left->addWith(right); 69 70 return defaultAddWith(left, right); 71 } 72 73 } // namespace WebCore 74
