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/*
* Copyright (C) 2012 Google, Inc.
*
* 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 SVGSubpathData_h
#define SVGSubpathData_h
#if ENABLE(SVG)
#include "Path.h"
#include <wtf/Vector.h>
namespace WebCore {
class SVGSubpathData {
public:
SVGSubpathData(Vector<FloatPoint>& zeroLengthSubpathLocations)
: m_zeroLengthSubpathLocations(zeroLengthSubpathLocations)
, m_haveSeenMoveOnly(true)
, m_pathIsZeroLength(true)
{
m_lastPoint.set(0, 0);
m_movePoint.set(0, 0);
}
static void updateFromPathElement(void* info, const PathElement* element)
{
SVGSubpathData* subpathFinder = static_cast<SVGSubpathData*>(info);
switch (element->type) {
case PathElementMoveToPoint:
if (subpathFinder->m_pathIsZeroLength && !subpathFinder->m_haveSeenMoveOnly)
subpathFinder->m_zeroLengthSubpathLocations.append(subpathFinder->m_lastPoint);
subpathFinder->m_lastPoint = subpathFinder->m_movePoint = element->points[0];
subpathFinder->m_haveSeenMoveOnly = true;
subpathFinder->m_pathIsZeroLength = true;
break;
case PathElementAddLineToPoint:
if (subpathFinder->m_lastPoint != element->points[0]) {
subpathFinder->m_pathIsZeroLength = false;
subpathFinder->m_lastPoint = element->points[0];
}
subpathFinder->m_haveSeenMoveOnly = false;
break;
case PathElementAddQuadCurveToPoint:
if (subpathFinder->m_lastPoint != element->points[0] || element->points[0] != element->points[1]) {
subpathFinder->m_pathIsZeroLength = false;
subpathFinder->m_lastPoint = element->points[1];
}
subpathFinder->m_haveSeenMoveOnly = false;
break;
case PathElementAddCurveToPoint:
if (subpathFinder->m_lastPoint != element->points[0] || element->points[0] != element->points[1] || element->points[1] != element->points[2]) {
subpathFinder->m_pathIsZeroLength = false;
subpathFinder->m_lastPoint = element->points[2];
}
subpathFinder->m_haveSeenMoveOnly = false;
break;
case PathElementCloseSubpath:
if (subpathFinder->m_pathIsZeroLength)
subpathFinder->m_zeroLengthSubpathLocations.append(subpathFinder->m_lastPoint);
subpathFinder->m_haveSeenMoveOnly = true; // This is an implicit move for the next element
subpathFinder->m_pathIsZeroLength = true; // A new sub-path also starts here
subpathFinder->m_lastPoint = subpathFinder->m_movePoint;
break;
}
}
void pathIsDone()
{
if (m_pathIsZeroLength && !m_haveSeenMoveOnly)
m_zeroLengthSubpathLocations.append(m_lastPoint);
}
private:
Vector<FloatPoint>& m_zeroLengthSubpathLocations;
FloatPoint m_lastPoint;
FloatPoint m_movePoint;
bool m_haveSeenMoveOnly;
bool m_pathIsZeroLength;
};
}
#endif // ENABLE(SVG)
#endif // SVGSubpathData_h
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