1/* 2 * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org> 3 * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@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#include "core/svg/SVGStopElement.h" 24 25#include "core/rendering/svg/RenderSVGGradientStop.h" 26#include "core/rendering/svg/RenderSVGResource.h" 27#include "core/svg/SVGElementInstance.h" 28 29namespace WebCore { 30 31// Animated property definitions 32DEFINE_ANIMATED_NUMBER(SVGStopElement, SVGNames::offsetAttr, Offset, offset) 33 34BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGStopElement) 35 REGISTER_LOCAL_ANIMATED_PROPERTY(offset) 36 REGISTER_PARENT_ANIMATED_PROPERTIES(SVGElement) 37END_REGISTER_ANIMATED_PROPERTIES 38 39inline SVGStopElement::SVGStopElement(Document& document) 40 : SVGElement(SVGNames::stopTag, document) 41 , m_offset(0) 42{ 43 ScriptWrappable::init(this); 44 registerAnimatedPropertiesForSVGStopElement(); 45} 46 47PassRefPtr<SVGStopElement> SVGStopElement::create(Document& document) 48{ 49 return adoptRef(new SVGStopElement(document)); 50} 51 52bool SVGStopElement::isSupportedAttribute(const QualifiedName& attrName) 53{ 54 DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ()); 55 if (supportedAttributes.isEmpty()) 56 supportedAttributes.add(SVGNames::offsetAttr); 57 return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName); 58} 59 60void SVGStopElement::parseAttribute(const QualifiedName& name, const AtomicString& value) 61{ 62 if (!isSupportedAttribute(name)) { 63 SVGElement::parseAttribute(name, value); 64 return; 65 } 66 67 if (name == SVGNames::offsetAttr) { 68 if (value.endsWith('%')) 69 setOffsetBaseValue(value.string().left(value.length() - 1).toFloat() / 100.0f); 70 else 71 setOffsetBaseValue(value.toFloat()); 72 return; 73 } 74 75 ASSERT_NOT_REACHED(); 76} 77 78void SVGStopElement::svgAttributeChanged(const QualifiedName& attrName) 79{ 80 if (!isSupportedAttribute(attrName)) { 81 SVGElement::svgAttributeChanged(attrName); 82 return; 83 } 84 85 SVGElementInstance::InvalidationGuard invalidationGuard(this); 86 87 if (!renderer()) 88 return; 89 90 if (attrName == SVGNames::offsetAttr) { 91 RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer()); 92 return; 93 } 94 95 ASSERT_NOT_REACHED(); 96} 97 98RenderObject* SVGStopElement::createRenderer(RenderStyle*) 99{ 100 return new RenderSVGGradientStop(this); 101} 102 103bool SVGStopElement::rendererIsNeeded(const RenderStyle&) 104{ 105 return true; 106} 107 108Color SVGStopElement::stopColorIncludingOpacity() const 109{ 110 RenderStyle* style = renderer() ? renderer()->style() : 0; 111 // FIXME: This check for null style exists to address Bug WK 90814, a rare crash condition in 112 // which the renderer or style is null. This entire class is scheduled for removal (Bug WK 86941) 113 // and we will tolerate this null check until then. 114 if (!style || !style->svgStyle()) 115 return Color(Color::transparent, true); // Transparent black. 116 117 const SVGRenderStyle* svgStyle = style->svgStyle(); 118 return colorWithOverrideAlpha(svgStyle->stopColor().rgb(), svgStyle->stopOpacity()); 119} 120 121} 122