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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"
#if ENABLE(SVG)
#include "SVGPathSegList.h"
#include "FloatConversion.h"
#include "FloatPoint.h"
#include "Path.h"
#include "PathTraversalState.h"
#include "SVGPathSegArc.h"
#include "SVGPathSegClosePath.h"
#include "SVGPathSegMoveto.h"
#include "SVGPathSegLineto.h"
#include "SVGPathSegLinetoHorizontal.h"
#include "SVGPathSegLinetoVertical.h"
#include "SVGPathSegCurvetoCubic.h"
#include "SVGPathSegCurvetoCubicSmooth.h"
#include "SVGPathSegCurvetoQuadratic.h"
#include "SVGPathSegCurvetoQuadraticSmooth.h"
namespace WebCore {
SVGPathSegList::SVGPathSegList(const QualifiedName& attributeName)
: SVGList<RefPtr<SVGPathSeg> >(attributeName)
{
}
SVGPathSegList::~SVGPathSegList()
{
}
unsigned SVGPathSegList::getPathSegAtLength(double length, ExceptionCode& ec)
{
// FIXME : to be useful this will need to support non-normalized SVGPathSegLists
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);
traversalState.m_desiredLength = narrowPrecisionToFloat(length);
for (int i = 0; i < len; ++i) {
SVGPathSeg* segment = getItem(i, ec).get();
if (ec)
return 0;
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++;
}
// The SVG spec is unclear as to what to return when the distance is not on the path.
// WebKit/Opera/FF all return the last path segment if the distance exceeds the actual path length:
return traversalState.m_segmentIndex ? traversalState.m_segmentIndex - 1 : 0;
}
Path SVGPathSegList::toPathData()
{
// FIXME : This should also support non-normalized PathSegLists
Path pathData;
int len = numberOfItems();
ExceptionCode ec = 0;
for (int i = 0; i < len; ++i) {
SVGPathSeg* segment = getItem(i, ec).get();
if (ec)
return Path();
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;
}
float adjustAnimatedValue(float from, float to, float progress)
{
return (to - from) * progress + from;
}
#define BLENDPATHSEG1(class, attr1) \
class::create(adjustAnimatedValue(static_cast<class*>(from)->attr1(), static_cast<class*>(to)->attr1(), progress))
#define BLENDPATHSEG2(class, attr1, attr2) \
class::create(adjustAnimatedValue(static_cast<class*>(from)->attr1(), static_cast<class*>(to)->attr1(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr2(), static_cast<class*>(to)->attr2(), progress))
#define BLENDPATHSEG4(class, attr1, attr2, attr3, attr4) \
class::create(adjustAnimatedValue(static_cast<class*>(from)->attr1(), static_cast<class*>(to)->attr1(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr2(), static_cast<class*>(to)->attr2(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr3(), static_cast<class*>(to)->attr3(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr4(), static_cast<class*>(to)->attr4(), progress))
#define BLENDPATHSEG6(class, attr1, attr2, attr3, attr4, attr5, attr6) \
class::create(adjustAnimatedValue(static_cast<class*>(from)->attr1(), static_cast<class*>(to)->attr1(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr2(), static_cast<class*>(to)->attr2(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr3(), static_cast<class*>(to)->attr3(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr4(), static_cast<class*>(to)->attr4(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr5(), static_cast<class*>(to)->attr5(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr6(), static_cast<class*>(to)->attr6(), progress))
#define BLENDPATHSEG7(class, attr1, attr2, attr3, attr4, attr5, bool1, bool2) \
class::create(adjustAnimatedValue(static_cast<class*>(from)->attr1(), static_cast<class*>(to)->attr1(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr2(), static_cast<class*>(to)->attr2(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr3(), static_cast<class*>(to)->attr3(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr4(), static_cast<class*>(to)->attr4(), progress), \
adjustAnimatedValue(static_cast<class*>(from)->attr5(), static_cast<class*>(to)->attr5(), progress), \
static_cast<bool>(adjustAnimatedValue(static_cast<class*>(from)->bool1(), static_cast<class*>(to)->bool1(), progress)), \
static_cast<bool>(adjustAnimatedValue(static_cast<class*>(from)->bool2(), static_cast<class*>(to)->bool2(), progress)))
PassRefPtr<SVGPathSegList> SVGPathSegList::createAnimated(const SVGPathSegList* fromList, const SVGPathSegList* toList, float progress)
{
unsigned itemCount = fromList->numberOfItems();
if (!itemCount || itemCount != toList->numberOfItems())
return 0;
RefPtr<SVGPathSegList> result = create(fromList->associatedAttributeName());
ExceptionCode ec = 0;
for (unsigned n = 0; n < itemCount; ++n) {
SVGPathSeg* from = fromList->getItem(n, ec).get();
if (ec)
return 0;
SVGPathSeg* to = toList->getItem(n, ec).get();
if (ec)
return 0;
if (from->pathSegType() == SVGPathSeg::PATHSEG_UNKNOWN || from->pathSegType() != to->pathSegType())
return 0;
RefPtr<SVGPathSeg> segment = 0;
switch (static_cast<SVGPathSeg::SVGPathSegType>(from->pathSegType())) {
case SVGPathSeg::PATHSEG_CLOSEPATH:
segment = SVGPathSegClosePath::create();
break;
case SVGPathSeg::PATHSEG_LINETO_HORIZONTAL_ABS:
segment = BLENDPATHSEG1(SVGPathSegLinetoHorizontalAbs, x);
break;
case SVGPathSeg::PATHSEG_LINETO_HORIZONTAL_REL:
segment = BLENDPATHSEG1(SVGPathSegLinetoHorizontalRel, x);
break;
case SVGPathSeg::PATHSEG_LINETO_VERTICAL_ABS:
segment = BLENDPATHSEG1(SVGPathSegLinetoVerticalAbs, y);
break;
case SVGPathSeg::PATHSEG_LINETO_VERTICAL_REL:
segment = BLENDPATHSEG1(SVGPathSegLinetoVerticalRel, y);
break;
case SVGPathSeg::PATHSEG_MOVETO_ABS:
segment = BLENDPATHSEG2(SVGPathSegMovetoAbs, x, y);
break;
case SVGPathSeg::PATHSEG_MOVETO_REL:
segment = BLENDPATHSEG2(SVGPathSegMovetoRel, x, y);
break;
case SVGPathSeg::PATHSEG_LINETO_ABS:
segment = BLENDPATHSEG2(SVGPathSegLinetoAbs, x, y);
break;
case SVGPathSeg::PATHSEG_LINETO_REL:
segment = BLENDPATHSEG2(SVGPathSegLinetoRel, x, y);
break;
case SVGPathSeg::PATHSEG_CURVETO_CUBIC_ABS:
segment = BLENDPATHSEG6(SVGPathSegCurvetoCubicAbs, x, y, x1, y1, x2, y2);
break;
case SVGPathSeg::PATHSEG_CURVETO_CUBIC_REL:
segment = BLENDPATHSEG6(SVGPathSegCurvetoCubicRel, x, y, x1, y1, x2, y2);
break;
case SVGPathSeg::PATHSEG_CURVETO_CUBIC_SMOOTH_ABS:
segment = BLENDPATHSEG4(SVGPathSegCurvetoCubicSmoothAbs, x, y, x2, y2);
break;
case SVGPathSeg::PATHSEG_CURVETO_CUBIC_SMOOTH_REL:
segment = BLENDPATHSEG4(SVGPathSegCurvetoCubicSmoothRel, x, y, x2, y2);
break;
case SVGPathSeg::PATHSEG_CURVETO_QUADRATIC_ABS:
segment = BLENDPATHSEG4(SVGPathSegCurvetoQuadraticAbs, x, y, x1, y1);
break;
case SVGPathSeg::PATHSEG_CURVETO_QUADRATIC_REL:
segment = BLENDPATHSEG4(SVGPathSegCurvetoQuadraticRel, x, y, x1, y1);
break;
case SVGPathSeg::PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS:
segment = BLENDPATHSEG2(SVGPathSegCurvetoQuadraticSmoothAbs, x, y);
break;
case SVGPathSeg::PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL:
segment = BLENDPATHSEG2(SVGPathSegCurvetoQuadraticSmoothRel, x, y);
break;
case SVGPathSeg::PATHSEG_ARC_ABS:
segment = BLENDPATHSEG7(SVGPathSegArcAbs, x, y, r1, r2, angle, largeArcFlag, sweepFlag);
break;
case SVGPathSeg::PATHSEG_ARC_REL:
segment = BLENDPATHSEG7(SVGPathSegArcRel, x, y, r1, r2, angle, largeArcFlag, sweepFlag);
break;
case SVGPathSeg::PATHSEG_UNKNOWN:
ASSERT_NOT_REACHED();
}
result->appendItem(segment, ec);
if (ec)
return 0;
}
return result.release();
}
}
#endif // ENABLE(SVG)
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