| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "core/animation/animatable/AnimatableRepeatable.h" |
| |
| #include "wtf/MathExtras.h" |
| |
| namespace blink { |
| |
| bool AnimatableRepeatable::usesDefaultInterpolationWith( |
| const AnimatableValue* value) const { |
| const Vector<RefPtr<AnimatableValue>>& fromValues = m_values; |
| const Vector<RefPtr<AnimatableValue>>& toValues = |
| toAnimatableRepeatable(value)->m_values; |
| DCHECK(!fromValues.isEmpty() && !toValues.isEmpty()); |
| size_t size = lowestCommonMultiple(fromValues.size(), toValues.size()); |
| DCHECK_GT(size, 0U); |
| for (size_t i = 0; i < size; ++i) { |
| const AnimatableValue* from = fromValues[i % fromValues.size()].get(); |
| const AnimatableValue* to = toValues[i % toValues.size()].get(); |
| // Spec: If a pair of values cannot be interpolated, then the lists are not |
| // interpolable. |
| if (AnimatableValue::usesDefaultInterpolation(from, to)) |
| return true; |
| } |
| return false; |
| } |
| |
| bool AnimatableRepeatable::interpolateLists( |
| const Vector<RefPtr<AnimatableValue>>& fromValues, |
| const Vector<RefPtr<AnimatableValue>>& toValues, |
| double fraction, |
| Vector<RefPtr<AnimatableValue>>& interpolatedValues) { |
| // Interpolation behaviour spec: |
| // http://www.w3.org/TR/css3-transitions/#animtype-repeatable-list |
| DCHECK(interpolatedValues.isEmpty()); |
| DCHECK(!fromValues.isEmpty() && !toValues.isEmpty()); |
| size_t size = lowestCommonMultiple(fromValues.size(), toValues.size()); |
| DCHECK_GT(size, 0U); |
| for (size_t i = 0; i < size; ++i) { |
| const AnimatableValue* from = fromValues[i % fromValues.size()].get(); |
| const AnimatableValue* to = toValues[i % toValues.size()].get(); |
| // Spec: If a pair of values cannot be interpolated, then the lists are not |
| // interpolable. |
| if (AnimatableValue::usesDefaultInterpolation(from, to)) |
| return false; |
| interpolatedValues.append(interpolate(from, to, fraction)); |
| } |
| return true; |
| } |
| |
| PassRefPtr<AnimatableValue> AnimatableRepeatable::interpolateTo( |
| const AnimatableValue* value, |
| double fraction) const { |
| Vector<RefPtr<AnimatableValue>> interpolatedValues; |
| bool success = |
| interpolateLists(m_values, toAnimatableRepeatable(value)->m_values, |
| fraction, interpolatedValues); |
| if (success) |
| return create(interpolatedValues); |
| return defaultInterpolateTo(this, value, fraction); |
| } |
| |
| bool AnimatableRepeatable::equalTo(const AnimatableValue* value) const { |
| const Vector<RefPtr<AnimatableValue>>& otherValues = |
| toAnimatableRepeatable(value)->m_values; |
| if (m_values.size() != otherValues.size()) |
| return false; |
| for (size_t i = 0; i < m_values.size(); ++i) { |
| if (!m_values[i]->equals(otherValues[i].get())) |
| return false; |
| } |
| return true; |
| } |
| |
| } // namespace blink |