[WIP] Web Animations: Migrate SVG number list interpolation to interpolation types

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

Index: third_party/WebKit/Source/core/animation/SVGNumberListInterpolationType.cpp
diff --git a/third_party/WebKit/Source/core/animation/SVGNumberListInterpolationType.cpp b/third_party/WebKit/Source/core/animation/SVGNumberListInterpolationType.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..c8a7c511c66416cd4b1885462bee1c3fdd7fc123
--- /dev/null
+++ b/third_party/WebKit/Source/core/animation/SVGNumberListInterpolationType.cpp
@@ -0,0 +1,74 @@
+// Copyright 2015 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/SVGNumberListInterpolationType.h"
+
+#include "core/animation/InterpolationEnvironment.h"
+#include "core/svg/SVGNumberList.h"
+#include "core/svg/properties/SVGAnimatedProperty.h"
+
+namespace blink {
+
+PassOwnPtr<InterpolationValue> SVGNumberListInterpolationType::maybeConvertNeutral() const
+{
+    return InterpolationValue::create(*this, InterpolableList::create(0));
+}
+
+PassOwnPtr<InterpolationValue> SVGNumberListInterpolationType::maybeConvertSVGValue(const SVGPropertyBase& svgValue) const
+{
+    if (svgValue.type() != AnimatedNumberList)
+        return nullptr;
+    const SVGNumberList& svgList = static_cast<const SVGNumberList&>(svgValue);
+    OwnPtr<InterpolableList> result = InterpolableList::create(svgList.length());
+    for (size_t i = 0; i < svgList.length(); i++)
+        result->set(i, InterpolableNumber::create(svgList.at(i)->value()));
+    return InterpolationValue::create(*this, result.release());
+}
+
+PassOwnPtr<InterpolationValue> SVGNumberListInterpolationType::maybeConvertUnderlyingValue(const InterpolationEnvironment& environment) const
+{
+    return maybeConvertSVGValue(environment.svgBaseValue());
+}
+
+RefPtrWillBeRawPtr<SVGPropertyBase> SVGNumberListInterpolationType::appliedSVGValue(const InterpolableValue& interpolableValue, const NonInterpolableValue*) const
+{
+    RefPtrWillBeRawPtr<SVGNumberList> result = SVGNumberList::create();
+    const InterpolableList& list = toInterpolableList(interpolableValue);
+    for (size_t i = 0; i < list.length(); ++i)
+        result->append(SVGNumber::create(toInterpolableNumber(list.get(i))->value()));
+    return result.release();
+}
+
+PassOwnPtr<InterpolableList> padWithZeroes(PassOwnPtr<InterpolableValue> listValue, size_t paddedLength)
+{
+    ASSERT(listValue && listValue->isList());
+    InterpolableList& list = toInterpolableList(*listValue);
+    OwnPtr<InterpolableList> result = InterpolableList::create(paddedLength);
+    for (size_t i = 0; i < list.length(); ++i)
+        result->set(i, list.getMutable(i).release());
+    for (size_t i = list.length(); i < paddedLength; ++i)
+        result->set(i, InterpolableNumber::create(0));
+
+    return result.release();
+}
+
+PassOwnPtr<PairwisePrimitiveInterpolation> SVGNumberListInterpolationType::mergeSingleConversions(InterpolationValue& startValue, InterpolationValue& endValue) const
+{
+    OwnPtr<InterpolableValue> start = startValue.mutableComponent().interpolableValue.release();
+    OwnPtr<InterpolableValue> end = endValue.mutableComponent().interpolableValue.release();
+
+    size_t startLength = toInterpolableList(*start).length();
+    size_t endLength = toInterpolableList(*end).length();
+    if (startLength < endLength)
+        start = padWithZeroes(start.release(), endLength);
+    if (endLength < startLength)
+        end = padWithZeroes(end.release(), startLength);
+
+    RELEASE_ASSERT(toInterpolableList(*start).length() == toInterpolableList(*end).length());
+
+    return PairwisePrimitiveInterpolation::create(*this, start.release(), end.release(), nullptr);
+}
+
+} // namespace blink