1 /* 2 Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann (at) kde.org> 3 2004, 2005, 2006, 2007 Rob Buis <buis (at) kde.org> 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Library General Public 7 License as published by the Free Software Foundation; either 8 version 2 of the License, or (at your option) any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Library General Public License for more details. 14 15 You should have received a copy of the GNU Library General Public License 16 along with this library; see the file COPYING.LIB. If not, write to 17 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 Boston, MA 02110-1301, USA. 19 */ 20 21 #include "config.h" 22 23 #if ENABLE(SVG) 24 #include "SVGGradientElement.h" 25 26 #include "CSSStyleSelector.h" 27 #include "MappedAttribute.h" 28 #include "RenderPath.h" 29 #include "RenderSVGHiddenContainer.h" 30 #include "SVGNames.h" 31 #include "SVGPaintServerLinearGradient.h" 32 #include "SVGPaintServerRadialGradient.h" 33 #include "SVGStopElement.h" 34 #include "SVGTransformList.h" 35 #include "SVGTransformable.h" 36 #include "SVGUnitTypes.h" 37 38 namespace WebCore { 39 40 SVGGradientElement::SVGGradientElement(const QualifiedName& tagName, Document* doc) 41 : SVGStyledElement(tagName, doc) 42 , SVGURIReference() 43 , SVGExternalResourcesRequired() 44 , m_gradientUnits(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) 45 , m_gradientTransform(SVGTransformList::create(SVGNames::gradientTransformAttr)) 46 { 47 } 48 49 SVGGradientElement::~SVGGradientElement() 50 { 51 } 52 53 void SVGGradientElement::parseMappedAttribute(MappedAttribute* attr) 54 { 55 if (attr->name() == SVGNames::gradientUnitsAttr) { 56 if (attr->value() == "userSpaceOnUse") 57 setGradientUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE); 58 else if (attr->value() == "objectBoundingBox") 59 setGradientUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX); 60 } else if (attr->name() == SVGNames::gradientTransformAttr) { 61 SVGTransformList* gradientTransforms = gradientTransformBaseValue(); 62 if (!SVGTransformable::parseTransformAttribute(gradientTransforms, attr->value())) { 63 ExceptionCode ec = 0; 64 gradientTransforms->clear(ec); 65 } 66 } else if (attr->name() == SVGNames::spreadMethodAttr) { 67 if (attr->value() == "reflect") 68 setSpreadMethodBaseValue(SpreadMethodReflect); 69 else if (attr->value() == "repeat") 70 setSpreadMethodBaseValue(SpreadMethodRepeat); 71 else if (attr->value() == "pad") 72 setSpreadMethodBaseValue(SpreadMethodPad); 73 } else { 74 if (SVGURIReference::parseMappedAttribute(attr)) 75 return; 76 if (SVGExternalResourcesRequired::parseMappedAttribute(attr)) 77 return; 78 79 SVGStyledElement::parseMappedAttribute(attr); 80 } 81 } 82 83 void SVGGradientElement::svgAttributeChanged(const QualifiedName& attrName) 84 { 85 SVGStyledElement::svgAttributeChanged(attrName); 86 87 if (!m_resource) 88 return; 89 90 if (attrName == SVGNames::gradientUnitsAttr || 91 attrName == SVGNames::gradientTransformAttr || 92 attrName == SVGNames::spreadMethodAttr || 93 SVGURIReference::isKnownAttribute(attrName) || 94 SVGExternalResourcesRequired::isKnownAttribute(attrName) || 95 SVGStyledElement::isKnownAttribute(attrName)) 96 m_resource->invalidate(); 97 } 98 99 void SVGGradientElement::synchronizeProperty(const QualifiedName& attrName) 100 { 101 SVGStyledElement::synchronizeProperty(attrName); 102 103 if (attrName == anyQName()) { 104 synchronizeGradientUnits(); 105 synchronizeGradientTransform(); 106 synchronizeSpreadMethod(); 107 synchronizeExternalResourcesRequired(); 108 synchronizeHref(); 109 return; 110 } 111 112 if (attrName == SVGNames::gradientUnitsAttr) 113 synchronizeGradientUnits(); 114 else if (attrName == SVGNames::gradientTransformAttr) 115 synchronizeGradientTransform(); 116 else if (attrName == SVGNames::spreadMethodAttr) 117 synchronizeSpreadMethod(); 118 else if (SVGExternalResourcesRequired::isKnownAttribute(attrName)) 119 synchronizeExternalResourcesRequired(); 120 else if (SVGURIReference::isKnownAttribute(attrName)) 121 synchronizeHref(); 122 } 123 124 void SVGGradientElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) 125 { 126 SVGStyledElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta); 127 128 if (m_resource) 129 m_resource->invalidate(); 130 } 131 132 RenderObject* SVGGradientElement::createRenderer(RenderArena* arena, RenderStyle*) 133 { 134 return new (arena) RenderSVGHiddenContainer(this); 135 } 136 137 SVGResource* SVGGradientElement::canvasResource(const RenderObject*) 138 { 139 if (!m_resource) { 140 if (gradientType() == LinearGradientPaintServer) 141 m_resource = SVGPaintServerLinearGradient::create(this); 142 else 143 m_resource = SVGPaintServerRadialGradient::create(this); 144 } 145 146 return m_resource.get(); 147 } 148 149 Vector<SVGGradientStop> SVGGradientElement::buildStops() const 150 { 151 Vector<SVGGradientStop> stops; 152 RefPtr<RenderStyle> gradientStyle; 153 154 for (Node* n = firstChild(); n; n = n->nextSibling()) { 155 SVGElement* element = n->isSVGElement() ? static_cast<SVGElement*>(n) : 0; 156 157 if (element && element->isGradientStop()) { 158 SVGStopElement* stop = static_cast<SVGStopElement*>(element); 159 float stopOffset = stop->offset(); 160 161 Color color; 162 float opacity; 163 164 if (stop->renderer()) { 165 RenderStyle* stopStyle = stop->renderer()->style(); 166 color = stopStyle->svgStyle()->stopColor(); 167 opacity = stopStyle->svgStyle()->stopOpacity(); 168 } else { 169 // If there is no renderer for this stop element, then a parent element 170 // set display="none" - ie. <g display="none"><linearGradient><stop>.. 171 // Unfortunately we have to manually rebuild the stop style. See pservers-grad-19-b.svg 172 if (!gradientStyle) 173 gradientStyle = const_cast<SVGGradientElement*>(this)->styleForRenderer(); 174 175 RefPtr<RenderStyle> stopStyle = stop->resolveStyle(gradientStyle.get()); 176 177 color = stopStyle->svgStyle()->stopColor(); 178 opacity = stopStyle->svgStyle()->stopOpacity(); 179 } 180 181 stops.append(makeGradientStop(stopOffset, makeRGBA(color.red(), color.green(), color.blue(), int(opacity * 255.)))); 182 } 183 } 184 185 return stops; 186 } 187 188 } 189 190 #endif // ENABLE(SVG) 191