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/*
Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
2004, 2005 Rob Buis <buis@kde.org>
Copyright (C) 2007 Eric Seidel <eric@webkit.org>
This file is part of the WebKit project
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.
*/
#include "config.h"
#include "wtf/Platform.h"
#if ENABLE(SVG)
#include "SVGPathSegList.h"
#include "FloatPoint.h"
#include "Path.h"
#include "PathTraversalState.h"
#include "SVGPathSegMoveto.h"
#include "SVGPathSegLineto.h"
#include "SVGPathSegCurvetoCubic.h"
namespace WebCore {
SVGPathSegList::SVGPathSegList(const QualifiedName& attributeName)
: SVGList<RefPtr<SVGPathSeg> >(attributeName)
{
}
SVGPathSegList::~SVGPathSegList()
{
}
unsigned SVGPathSegList::getPathSegAtLength(double)
{
// FIXME : to be useful this will need to support non-normalized SVGPathSegLists
ExceptionCode ec = 0;
int len = numberOfItems();
// FIXME: Eventually this will likely move to a "path applier"-like model, until then PathTraversalState is less useful as we could just use locals
PathTraversalState traversalState(PathTraversalState::TraversalSegmentAtLength);
for (int i = 0; i < len; ++i) {
SVGPathSeg* segment = getItem(i, ec).get();
float segmentLength = 0;
switch (segment->pathSegType()) {
case SVGPathSeg::PATHSEG_MOVETO_ABS:
{
SVGPathSegMovetoAbs* moveTo = static_cast<SVGPathSegMovetoAbs*>(segment);
segmentLength = traversalState.moveTo(FloatPoint(moveTo->x(), moveTo->y()));
break;
}
case SVGPathSeg::PATHSEG_LINETO_ABS:
{
SVGPathSegLinetoAbs* lineTo = static_cast<SVGPathSegLinetoAbs*>(segment);
segmentLength = traversalState.lineTo(FloatPoint(lineTo->x(), lineTo->y()));
break;
}
case SVGPathSeg::PATHSEG_CURVETO_CUBIC_ABS:
{
SVGPathSegCurvetoCubicAbs* curveTo = static_cast<SVGPathSegCurvetoCubicAbs*>(segment);
segmentLength = traversalState.cubicBezierTo(FloatPoint(curveTo->x1(), curveTo->y1()),
FloatPoint(curveTo->x2(), curveTo->y2()),
FloatPoint(curveTo->x(), curveTo->y()));
break;
}
case SVGPathSeg::PATHSEG_CLOSEPATH:
segmentLength = traversalState.closeSubpath();
break;
default:
ASSERT(false); // FIXME: This only works with normalized/processed path data.
break;
}
traversalState.m_totalLength += segmentLength;
if ((traversalState.m_action == PathTraversalState::TraversalSegmentAtLength)
&& (traversalState.m_totalLength > traversalState.m_desiredLength)) {
return traversalState.m_segmentIndex;
}
traversalState.m_segmentIndex++;
}
return 0; // The SVG spec is unclear as to what to return when the distance is not on the path
}
khtml::Path SVGPathSegList::toPathData()
{
// FIXME : This should also support non-normalized PathSegLists
Path pathData;
ExceptionCode ec = 0;
int len = numberOfItems();
for (int i = 0; i < len; ++i) {
SVGPathSeg* segment = getItem(i, ec).get();
switch (segment->pathSegType())
{
case SVGPathSeg::PATHSEG_MOVETO_ABS:
{
SVGPathSegMovetoAbs* moveTo = static_cast<SVGPathSegMovetoAbs*>(segment);
pathData.moveTo(FloatPoint(moveTo->x(), moveTo->y()));
break;
}
case SVGPathSeg::PATHSEG_LINETO_ABS:
{
SVGPathSegLinetoAbs* lineTo = static_cast<SVGPathSegLinetoAbs*>(segment);
pathData.addLineTo(FloatPoint(lineTo->x(), lineTo->y()));
break;
}
case SVGPathSeg::PATHSEG_CURVETO_CUBIC_ABS:
{
SVGPathSegCurvetoCubicAbs* curveTo = static_cast<SVGPathSegCurvetoCubicAbs*>(segment);
pathData.addBezierCurveTo(FloatPoint(curveTo->x1(), curveTo->y1()),
FloatPoint(curveTo->x2(), curveTo->y2()),
FloatPoint(curveTo->x(), curveTo->y()));
break;
}
case SVGPathSeg::PATHSEG_CLOSEPATH:
pathData.closeSubpath();
break;
default:
ASSERT(false); // FIXME: This only works with normalized/processed path data.
break;
}
}
return pathData;
}
}
#endif // ENABLE(SVG)
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