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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "core/animation/Interpolation.h"
namespace blink {
DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(Interpolation);
namespace {
bool typesMatch(const InterpolableValue* start, const InterpolableValue* end)
{
if (start->isNumber())
return end->isNumber();
if (start->isBool())
return end->isBool();
if (start->isAnimatableValue())
return end->isAnimatableValue();
if (!(start->isList() && end->isList()))
return false;
const InterpolableList* startList = toInterpolableList(start);
const InterpolableList* endList = toInterpolableList(end);
if (startList->length() != endList->length())
return false;
for (size_t i = 0; i < startList->length(); ++i) {
if (!typesMatch(startList->get(i), endList->get(i)))
return false;
}
return true;
}
}
Interpolation::Interpolation(PassOwnPtrWillBeRawPtr<InterpolableValue> start, PassOwnPtrWillBeRawPtr<InterpolableValue> end)
: m_start(start)
, m_end(end)
, m_cachedFraction(0)
, m_cachedIteration(0)
, m_cachedValue(m_start->clone())
{
RELEASE_ASSERT(typesMatch(m_start.get(), m_end.get()));
}
void Interpolation::interpolate(int iteration, double fraction) const
{
if (m_cachedFraction != fraction || m_cachedIteration != iteration) {
m_start->interpolate(*m_end, fraction, *m_cachedValue);
m_cachedIteration = iteration;
m_cachedFraction = fraction;
}
}
void Interpolation::trace(Visitor* visitor)
{
visitor->trace(m_start);
visitor->trace(m_end);
visitor->trace(m_cachedValue);
}
}
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