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/animatable/AnimatableValue.h" 33 34#include "core/animation/animatable/AnimatableNeutral.h" 35#include "wtf/StdLibExtras.h" 36#include <algorithm> 37 38namespace { 39 40const double defaultDistance = 1; 41 42} // namespace 43 44namespace blink { 45 46const AnimatableValue* AnimatableValue::neutralValue() 47{ 48 DEFINE_STATIC_REF_WILL_BE_PERSISTENT(AnimatableNeutral, neutralSentinelValue, (AnimatableNeutral::create())); 49 return neutralSentinelValue; 50} 51 52PassRefPtrWillBeRawPtr<AnimatableValue> AnimatableValue::interpolate(const AnimatableValue* left, const AnimatableValue* right, double fraction) 53{ 54 ASSERT(left); 55 ASSERT(right); 56 ASSERT(!left->isNeutral()); 57 ASSERT(!right->isNeutral()); 58 59 if (fraction && fraction != 1 && left->isSameType(right)) 60 return left->interpolateTo(right, fraction); 61 62 return defaultInterpolateTo(left, right, fraction); 63} 64 65double AnimatableValue::distance(const AnimatableValue* left, const AnimatableValue* right) 66{ 67 ASSERT(left); 68 ASSERT(right); 69 70 if (left->isSameType(right)) 71 return left->distanceTo(right); 72 73 return defaultDistance; 74} 75 76double AnimatableValue::distanceTo(const AnimatableValue*) const 77{ 78 return defaultDistance; 79} 80 81} // namespace blink 82