File indexing completed on 2024-04-28 15:24:39

 /*
     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 "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)