WIP: Implement CSS transitions on top of InterpolationTypes instead of AnimatableValues

third_party/WebKit/Source/core/animation/StyleInterpolation.cpp

 // 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 "core/animation/Interpolation.h"
+#include "core/animation/StyleInterpolation.h"
 
 #include <memory>
 
 namespace blink {
 
 namespace {
 
 bool typesMatch(const InterpolableValue* start, const InterpolableValue* end)
 {
     if (start == end)
@@ skipping 12 matching lines @@
         return false;
     for (size_t i = 0; i < startList->length(); ++i) {
         if (!typesMatch(startList->get(i), endList->get(i)))
             return false;
     }
     return true;
 }
 
 } // namespace
 
-Interpolation::Interpolation(std::unique_ptr<InterpolableValue> start, std::unique_ptr<InterpolableValue> end)
+StyleInterpolation::StyleInterpolation(std::unique_ptr<InterpolableValue> start, std::unique_ptr<InterpolableValue> end, CSSPropertyID id)
     : m_start(std::move(start))
     , m_end(std::move(end))
-    , m_cachedFraction(0)
-    , m_cachedIteration(0)
+    , m_id(id)
     , m_cachedValue(m_start ? m_start->clone() : nullptr)
 {
     RELEASE_ASSERT(typesMatch(m_start.get(), m_end.get()));
 }
 
-Interpolation::~Interpolation()
+void StyleInterpolation::interpolateImpl()
 {
-}
-
-void Interpolation::interpolate(int iteration, double fraction)
-{
-    if (m_cachedFraction != fraction || m_cachedIteration != iteration) {
-        m_start->interpolate(*m_end, fraction, *m_cachedValue);
-        m_cachedIteration = iteration;
-        m_cachedFraction = fraction;
-    }
+    m_start->interpolate(*m_end, m_currentFraction, *m_cachedValue);
 }
 
 } // namespace blink