Web Animations: Add SVGPathInterpolationType

third_party/WebKit/Source/core/animation/InterpolatedSVGPathSource.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 InterpolatedSVGPathSource_h
+#define InterpolatedSVGPathSource_h
+
+#include "core/animation/SVGPathSegInterpolationFunctions.h"
+#include "core/svg/SVGPathSource.h"
+#include "wtf/Vector.h"
+
+namespace blink {
+
+class InterpolatedSVGPathSource : public SVGPathSource {
+public:
+    InterpolatedSVGPathSource(const InterpolableList& listValue, const Vector<SVGPathSegType>& pathSegTypes)
+        : m_currentIndex(0)
+        , m_interpolablePathSegs(listValue)
+        , m_pathSegTypes(pathSegTypes)
+    {
+        ASSERT(m_interpolablePathSegs.length() == m_pathSegTypes.size());
+    }
+
+private:
+    bool hasMoreData() const override;
+    SVGPathSegType peekSegmentType() override;
+    PathSegmentData parseSegment() override;
+
+    PathCoordinates m_currentCoordinates;
+    size_t m_currentIndex;
+    const InterpolableList& m_interpolablePathSegs;
+    const Vector<SVGPathSegType>& m_pathSegTypes;
+};
+
+bool InterpolatedSVGPathSource::hasMoreData() const
+{
+    return m_currentIndex < m_interpolablePathSegs.length();
+}
+
+SVGPathSegType InterpolatedSVGPathSource::peekSegmentType()
+{
+    ASSERT(hasMoreData());
+    return m_pathSegTypes.at(m_currentIndex);
+}
+
+PathSegmentData InterpolatedSVGPathSource::parseSegment()
+{
+    PathSegmentData segment = SVGPathSegInterpolationFunctions::consumeInterpolablePathSeg(*m_interpolablePathSegs.get(m_currentIndex), m_pathSegTypes.at(m_currentIndex), m_currentCoordinates);
+    m_currentIndex++;
+    return segment;
+}
+
+} // namespace blink
+
+#endif // InterpolatedSVGPathSource_h