| /* |
| * 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 |
| |
| #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 // SVGSubpathData_h |
| |