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 #include "core/platform/graphics/Path.h" 24 #include "wtf/Vector.h" 25 26 namespace WebCore { 27 28 class SVGSubpathData { 29 public: 30 SVGSubpathData(Vector<FloatPoint>& zeroLengthSubpathLocations) 31 : m_zeroLengthSubpathLocations(zeroLengthSubpathLocations) 32 , m_haveSeenMoveOnly(true) 33 , m_pathIsZeroLength(true) 34 { 35 m_lastPoint.set(0, 0); 36 m_movePoint.set(0, 0); 37 } 38 39 static void updateFromPathElement(void* info, const PathElement* element) 40 { 41 SVGSubpathData* subpathFinder = static_cast<SVGSubpathData*>(info); 42 switch (element->type) { 43 case PathElementMoveToPoint: 44 if (subpathFinder->m_pathIsZeroLength && !subpathFinder->m_haveSeenMoveOnly) 45 subpathFinder->m_zeroLengthSubpathLocations.append(subpathFinder->m_lastPoint); 46 subpathFinder->m_lastPoint = subpathFinder->m_movePoint = element->points[0]; 47 subpathFinder->m_haveSeenMoveOnly = true; 48 subpathFinder->m_pathIsZeroLength = true; 49 break; 50 case PathElementAddLineToPoint: 51 if (subpathFinder->m_lastPoint != element->points[0]) { 52 subpathFinder->m_pathIsZeroLength = false; 53 subpathFinder->m_lastPoint = element->points[0]; 54 } 55 subpathFinder->m_haveSeenMoveOnly = false; 56 break; 57 case PathElementAddQuadCurveToPoint: 58 if (subpathFinder->m_lastPoint != element->points[0] || element->points[0] != element->points[1]) { 59 subpathFinder->m_pathIsZeroLength = false; 60 subpathFinder->m_lastPoint = element->points[1]; 61 } 62 subpathFinder->m_haveSeenMoveOnly = false; 63 break; 64 case PathElementAddCurveToPoint: 65 if (subpathFinder->m_lastPoint != element->points[0] || element->points[0] != element->points[1] || element->points[1] != element->points[2]) { 66 subpathFinder->m_pathIsZeroLength = false; 67 subpathFinder->m_lastPoint = element->points[2]; 68 } 69 subpathFinder->m_haveSeenMoveOnly = false; 70 break; 71 case PathElementCloseSubpath: 72 if (subpathFinder->m_pathIsZeroLength) 73 subpathFinder->m_zeroLengthSubpathLocations.append(subpathFinder->m_lastPoint); 74 subpathFinder->m_haveSeenMoveOnly = true; // This is an implicit move for the next element 75 subpathFinder->m_pathIsZeroLength = true; // A new sub-path also starts here 76 subpathFinder->m_lastPoint = subpathFinder->m_movePoint; 77 break; 78 } 79 } 80 81 void pathIsDone() 82 { 83 if (m_pathIsZeroLength && !m_haveSeenMoveOnly) 84 m_zeroLengthSubpathLocations.append(m_lastPoint); 85 } 86 87 private: 88 Vector<FloatPoint>& m_zeroLengthSubpathLocations; 89 FloatPoint m_lastPoint; 90 FloatPoint m_movePoint; 91 bool m_haveSeenMoveOnly; 92 bool m_pathIsZeroLength; 93 }; 94 95 } 96 97 #endif // SVGSubpathData_h 98
