/*

 * Copyright (C) 2006, 2007 Eric Seidel <eric@webkit.org>

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#ifndef PathTraversalState_h

#define PathTraversalState_h

#include "FloatPoint.h"

#include <wtf/Vector.h>

namespace WebCore {

    class Path;

    class PathTraversalState {

    public:

        enum PathTraversalAction {

            TraversalTotalLength,

            TraversalPointAtLength,

            TraversalSegmentAtLength,

            TraversalNormalAngleAtLength

        };

        PathTraversalState(PathTraversalAction);

        float closeSubpath();

        float moveTo(const FloatPoint&);

        float lineTo(const FloatPoint&);

        float quadraticBezierTo(const FloatPoint& newControl, const FloatPoint& newEnd);

        float cubicBezierTo(const FloatPoint& newControl1, const FloatPoint& newControl2, const FloatPoint& newEnd);

    public:

        PathTraversalAction m_action;

        bool m_success;

        FloatPoint m_current;

        FloatPoint m_start;

        FloatPoint m_control1;

        FloatPoint m_control2;

        float m_totalLength;

        unsigned m_segmentIndex;

        float m_desiredLength;

        // For normal calculations

        FloatPoint m_previous;

        float m_normalAngle; // degrees

    };    

}

#endif