1 /* 2 * Copyright (C) Research In Motion Limited 2011. All rights reserved. 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 #include "config.h" 21 #include "core/rendering/svg/SVGPathData.h" 22 23 #include "core/SVGNames.h" 24 #include "core/svg/SVGCircleElement.h" 25 #include "core/svg/SVGEllipseElement.h" 26 #include "core/svg/SVGLineElement.h" 27 #include "core/svg/SVGPathElement.h" 28 #include "core/svg/SVGPathUtilities.h" 29 #include "core/svg/SVGPolygonElement.h" 30 #include "core/svg/SVGPolylineElement.h" 31 #include "core/svg/SVGRectElement.h" 32 #include "platform/graphics/Path.h" 33 #include "wtf/HashMap.h" 34 35 namespace WebCore { 36 37 using namespace SVGNames; 38 39 static void updatePathFromCircleElement(SVGElement* element, Path& path) 40 { 41 SVGCircleElement* circle = toSVGCircleElement(element); 42 43 SVGLengthContext lengthContext(element); 44 float r = circle->r()->currentValue()->value(lengthContext); 45 if (r > 0) 46 path.addEllipse(FloatRect(circle->cx()->currentValue()->value(lengthContext) - r, circle->cy()->currentValue()->value(lengthContext) - r, r * 2, r * 2)); 47 } 48 49 static void updatePathFromEllipseElement(SVGElement* element, Path& path) 50 { 51 SVGEllipseElement* ellipse = toSVGEllipseElement(element); 52 53 SVGLengthContext lengthContext(element); 54 float rx = ellipse->rx()->currentValue()->value(lengthContext); 55 if (rx < 0) 56 return; 57 float ry = ellipse->ry()->currentValue()->value(lengthContext); 58 if (ry < 0) 59 return; 60 if (!rx && !ry) 61 return; 62 63 path.addEllipse(FloatRect(ellipse->cx()->currentValue()->value(lengthContext) - rx, ellipse->cy()->currentValue()->value(lengthContext) - ry, rx * 2, ry * 2)); 64 } 65 66 static void updatePathFromLineElement(SVGElement* element, Path& path) 67 { 68 SVGLineElement* line = toSVGLineElement(element); 69 70 SVGLengthContext lengthContext(element); 71 path.moveTo(FloatPoint(line->x1()->currentValue()->value(lengthContext), line->y1()->currentValue()->value(lengthContext))); 72 path.addLineTo(FloatPoint(line->x2()->currentValue()->value(lengthContext), line->y2()->currentValue()->value(lengthContext))); 73 } 74 75 static void updatePathFromPathElement(SVGElement* element, Path& path) 76 { 77 buildPathFromByteStream(toSVGPathElement(element)->pathByteStream(), path); 78 } 79 80 static void updatePathFromPolylineElement(SVGElement* element, Path& path) 81 { 82 RefPtr<SVGPointList> points = toSVGPolyElement(element)->points()->currentValue(); 83 if (points->isEmpty()) 84 return; 85 86 SVGPointList::ConstIterator it = points->begin(); 87 SVGPointList::ConstIterator itEnd = points->end(); 88 ASSERT(it != itEnd); 89 path.moveTo(it->value()); 90 ++it; 91 92 for (; it != itEnd; ++it) 93 path.addLineTo(it->value()); 94 } 95 96 static void updatePathFromPolygonElement(SVGElement* element, Path& path) 97 { 98 updatePathFromPolylineElement(element, path); 99 path.closeSubpath(); 100 } 101 102 static void updatePathFromRectElement(SVGElement* element, Path& path) 103 { 104 SVGRectElement* rect = toSVGRectElement(element); 105 106 SVGLengthContext lengthContext(element); 107 float width = rect->width()->currentValue()->value(lengthContext); 108 if (width < 0) 109 return; 110 float height = rect->height()->currentValue()->value(lengthContext); 111 if (height < 0) 112 return; 113 if (!width && !height) 114 return; 115 float x = rect->x()->currentValue()->value(lengthContext); 116 float y = rect->y()->currentValue()->value(lengthContext); 117 float rx = rect->rx()->currentValue()->value(lengthContext); 118 float ry = rect->ry()->currentValue()->value(lengthContext); 119 bool hasRx = rx > 0; 120 bool hasRy = ry > 0; 121 if (hasRx || hasRy) { 122 if (!hasRx) 123 rx = ry; 124 else if (!hasRy) 125 ry = rx; 126 127 path.addRoundedRect(FloatRect(x, y, width, height), FloatSize(rx, ry)); 128 return; 129 } 130 131 path.addRect(FloatRect(x, y, width, height)); 132 } 133 134 void updatePathFromGraphicsElement(SVGElement* element, Path& path) 135 { 136 ASSERT(element); 137 ASSERT(path.isEmpty()); 138 139 typedef void (*PathUpdateFunction)(SVGElement*, Path&); 140 static HashMap<StringImpl*, PathUpdateFunction>* map = 0; 141 if (!map) { 142 map = new HashMap<StringImpl*, PathUpdateFunction>; 143 map->set(circleTag.localName().impl(), updatePathFromCircleElement); 144 map->set(ellipseTag.localName().impl(), updatePathFromEllipseElement); 145 map->set(lineTag.localName().impl(), updatePathFromLineElement); 146 map->set(pathTag.localName().impl(), updatePathFromPathElement); 147 map->set(polygonTag.localName().impl(), updatePathFromPolygonElement); 148 map->set(polylineTag.localName().impl(), updatePathFromPolylineElement); 149 map->set(rectTag.localName().impl(), updatePathFromRectElement); 150 } 151 152 if (PathUpdateFunction pathUpdateFunction = map->get(element->localName().impl())) 153 (*pathUpdateFunction)(element, path); 154 } 155 156 } // namespace WebCore 157