Introduce SVGPathQuery to hold SVG path query methods

third_party/WebKit/Source/core/svg/SVGPathQuery.h

 /*
+ * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
-#ifndef SVGPathByteStreamBuilder_h
-#define SVGPathByteStreamBuilder_h
-
-#include "core/svg/SVGPathConsumer.h"
+#ifndef SVGPathQuery_h
+#define SVGPathQuery_h
 
 namespace blink {
 
+class FloatPoint;
 class SVGPathByteStream;
 
-class SVGPathByteStreamBuilder final : public SVGPathConsumer {
+class SVGPathQuery {
 public:
-    SVGPathByteStreamBuilder(SVGPathByteStream&);
+    explicit SVGPathQuery(const SVGPathByteStream&);
+
+    float getTotalLength() const;
+    FloatPoint getPointAtLength(float length) const;
+    unsigned getPathSegIndexAtLength(float length) const;
 
 private:
-    void incrementPathSegmentCount() override { }
-    bool continueConsuming() override { return true; }
-
-    void emitSegment(const PathSegmentData&) override;
-
-    SVGPathByteStream& m_byteStream;
+    const SVGPathByteStream& m_pathByteStream;
 };
 
 } // namespace blink
 
-#endif // SVGPathByteStreamBuilder_h
+#endif // SVGPathQuery_h