1/* 2 * Copyright (C) 2012 Google, Inc. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20#ifndef SVGSubpathData_h 21#define SVGSubpathData_h 22 23#if ENABLE(SVG) 24#include "Path.h" 25#include <wtf/Vector.h> 26 27namespace WebCore { 28 29class SVGSubpathData { 30public: 31 SVGSubpathData(Vector<FloatPoint>& zeroLengthSubpathLocations) 32 : m_zeroLengthSubpathLocations(zeroLengthSubpathLocations) 33 , m_haveSeenMoveOnly(true) 34 , m_pathIsZeroLength(true) 35 { 36 m_lastPoint.set(0, 0); 37 m_movePoint.set(0, 0); 38 } 39 40 static void updateFromPathElement(void* info, const PathElement* element) 41 { 42 SVGSubpathData* subpathFinder = static_cast<SVGSubpathData*>(info); 43 switch (element->type) { 44 case PathElementMoveToPoint: 45 if (subpathFinder->m_pathIsZeroLength && !subpathFinder->m_haveSeenMoveOnly) 46 subpathFinder->m_zeroLengthSubpathLocations.append(subpathFinder->m_lastPoint); 47 subpathFinder->m_lastPoint = subpathFinder->m_movePoint = element->points[0]; 48 subpathFinder->m_haveSeenMoveOnly = true; 49 subpathFinder->m_pathIsZeroLength = true; 50 break; 51 case PathElementAddLineToPoint: 52 if (subpathFinder->m_lastPoint != element->points[0]) { 53 subpathFinder->m_pathIsZeroLength = false; 54 subpathFinder->m_lastPoint = element->points[0]; 55 } 56 subpathFinder->m_haveSeenMoveOnly = false; 57 break; 58 case PathElementAddQuadCurveToPoint: 59 if (subpathFinder->m_lastPoint != element->points[0] || element->points[0] != element->points[1]) { 60 subpathFinder->m_pathIsZeroLength = false; 61 subpathFinder->m_lastPoint = element->points[1]; 62 } 63 subpathFinder->m_haveSeenMoveOnly = false; 64 break; 65 case PathElementAddCurveToPoint: 66 if (subpathFinder->m_lastPoint != element->points[0] || element->points[0] != element->points[1] || element->points[1] != element->points[2]) { 67 subpathFinder->m_pathIsZeroLength = false; 68 subpathFinder->m_lastPoint = element->points[2]; 69 } 70 subpathFinder->m_haveSeenMoveOnly = false; 71 break; 72 case PathElementCloseSubpath: 73 if (subpathFinder->m_pathIsZeroLength) 74 subpathFinder->m_zeroLengthSubpathLocations.append(subpathFinder->m_lastPoint); 75 subpathFinder->m_haveSeenMoveOnly = true; // This is an implicit move for the next element 76 subpathFinder->m_pathIsZeroLength = true; // A new sub-path also starts here 77 subpathFinder->m_lastPoint = subpathFinder->m_movePoint; 78 break; 79 } 80 } 81 82 void pathIsDone() 83 { 84 if (m_pathIsZeroLength && !m_haveSeenMoveOnly) 85 m_zeroLengthSubpathLocations.append(m_lastPoint); 86 } 87 88private: 89 Vector<FloatPoint>& m_zeroLengthSubpathLocations; 90 FloatPoint m_lastPoint; 91 FloatPoint m_movePoint; 92 bool m_haveSeenMoveOnly; 93 bool m_pathIsZeroLength; 94}; 95 96} 97 98#endif // ENABLE(SVG) 99#endif // SVGSubpathData_h 100 101