Web Animations: Add SVGNumberInterpolationType

third_party/WebKit/Source/core/animation/SVGNumberInterpolationType.h

+// 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.
+
+#ifndef SVGNumberInterpolationType_h
+#define SVGNumberInterpolationType_h
+
+#include "core/animation/NumberAttributeFunctions.h"
+#include "core/animation/SVGInterpolationType.h"
+
+namespace blink {
+
+class SVGNumberInterpolationType : public SVGInterpolationType {
+public:
+    SVGNumberInterpolationType(const QualifiedName& attribute)
+        : SVGInterpolationType(attribute)
+        , m_isNonNegative(NumberAttributeFunctions::isNonNegative(attribute))
+    { }
+
+private:
+    PassOwnPtr<InterpolationValue> maybeConvertNeutral() const final;
+    PassOwnPtr<InterpolationValue> maybeConvertSVGValue(const SVGPropertyBase& svgValue) const final;
+    PassOwnPtr<InterpolationValue> maybeConvertUnderlyingValue(const InterpolationEnvironment&) const final;
+    RefPtrWillBeRawPtr<SVGPropertyBase> appliedSVGValue(const InterpolableValue&, const NonInterpolableValue*) const final;
+
+    bool m_isNonNegative;
+};
+
+} // namespace blink
+
+#endif // SVGNumberInterpolationType_h