Web Animations: Add SVGNumberListInterpolationType

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..95da7cdd63b6b8dce1cb95e468d1d6ec04a66189
--- /dev/null
+++ b/third_party/WebKit/Source/core/animation/SVGNumberListInterpolationType.cpp
@@ -0,0 +1,91 @@
+// 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/animation/UnderlyingLengthChecker.h"
+#include "core/svg/SVGNumberList.h"
+
+namespace blink {
+
+PassOwnPtr<InterpolationValue> SVGNumberListInterpolationType::maybeConvertNeutral(const UnderlyingValue& underlyingValue, ConversionCheckers& conversionCheckers) const
+{
+    size_t underlyingLength = UnderlyingLengthChecker::getUnderlyingLength(underlyingValue);
+    conversionCheckers.append(UnderlyingLengthChecker::create(*this, underlyingLength));
+
+    if (underlyingLength == 0)
+        return nullptr;
+
+    OwnPtr<InterpolableList> result = InterpolableList::create(underlyingLength);
+    for (size_t i = 0; i < underlyingLength; i++)
+        result->set(i, InterpolableNumber::create(0));
+    return InterpolationValue::create(*this, result.release());
+}
+
+PassOwnPtr<InterpolationValue> SVGNumberListInterpolationType::maybeConvertSVGValue(const SVGPropertyBase& svgValue) const
+{
+    if (svgValue.type() != AnimatedNumberList)
+        return nullptr;
+
+    const SVGNumberList& numberList = toSVGNumberList(svgValue);
+    OwnPtr<InterpolableList> result = InterpolableList::create(numberList.length());
+    for (size_t i = 0; i < numberList.length(); i++)
+        result->set(i, InterpolableNumber::create(numberList.at(i)->value()));
+    return InterpolationValue::create(*this, result.release());
+}
+
+PassOwnPtr<PairwisePrimitiveInterpolation> SVGNumberListInterpolationType::mergeSingleConversions(InterpolationValue& startValue, InterpolationValue& endValue) const
+{
+    size_t startLength = toInterpolableList(startValue.interpolableValue()).length();
+    size_t endLength = toInterpolableList(endValue.interpolableValue()).length();
+    if (startLength != endLength)
+        return nullptr;
+    return InterpolationType::mergeSingleConversions(startValue, endValue);
+}
+
+static void padWithZeroes(OwnPtr<InterpolableValue>& listPointer, size_t paddedLength)
+{
+    InterpolableList& list = toInterpolableList(*listPointer);
+
+    if (list.length() >= paddedLength)
+        return;
+
+    OwnPtr<InterpolableList> result = InterpolableList::create(paddedLength);
+    size_t i = 0;
+    for (; i < list.length(); i++)
+        result->set(i, list.getMutable(i).release());
+    for (; i < paddedLength; i++)
+        result->set(i, InterpolableNumber::create(0));
+    listPointer = result.release();
+}
+
+void SVGNumberListInterpolationType::composite(UnderlyingValue& underlyingValue, double underlyingFraction, const InterpolationValue& value) const
+{
+    const InterpolableList& list = toInterpolableList(value.interpolableValue());
+
+    if (toInterpolableList(underlyingValue->interpolableValue()).length() <= list.length())
+        padWithZeroes(underlyingValue.mutableComponent().interpolableValue, list.length());
+
+    InterpolableList& underlyingList = *toInterpolableList(underlyingValue.mutableComponent().interpolableValue.get());
+
+    ASSERT(underlyingList.length() >= list.length());
+    size_t i = 0;
+    for (; i < list.length(); i++)
+        underlyingList.getMutable(i)->scaleAndAdd(underlyingFraction, *list.get(i));
+    for (; i < underlyingList.length(); i++)
+        underlyingList.getMutable(i)->scale(underlyingFraction);
+}
+
+PassRefPtrWillBeRawPtr<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();
+}
+
+} // namespace blink