1 /* 2 * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann (at) kde.org> 3 * Copyright (C) 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 #include "core/svg/SVGStopElement.h" 24 25 #include "SVGNames.h" 26 #include "core/rendering/svg/RenderSVGGradientStop.h" 27 #include "core/rendering/svg/RenderSVGResource.h" 28 #include "core/svg/SVGElementInstance.h" 29 30 namespace WebCore { 31 32 // Animated property definitions 33 DEFINE_ANIMATED_NUMBER(SVGStopElement, SVGNames::offsetAttr, Offset, offset) 34 35 BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGStopElement) 36 REGISTER_LOCAL_ANIMATED_PROPERTY(offset) 37 REGISTER_PARENT_ANIMATED_PROPERTIES(SVGElement) 38 END_REGISTER_ANIMATED_PROPERTIES 39 40 inline SVGStopElement::SVGStopElement(const QualifiedName& tagName, Document* document) 41 : SVGElement(tagName, document) 42 , m_offset(0) 43 { 44 ASSERT(hasTagName(SVGNames::stopTag)); 45 ScriptWrappable::init(this); 46 registerAnimatedPropertiesForSVGStopElement(); 47 } 48 49 PassRefPtr<SVGStopElement> SVGStopElement::create(const QualifiedName& tagName, Document* document) 50 { 51 return adoptRef(new SVGStopElement(tagName, document)); 52 } 53 54 bool SVGStopElement::isSupportedAttribute(const QualifiedName& attrName) 55 { 56 DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ()); 57 if (supportedAttributes.isEmpty()) 58 supportedAttributes.add(SVGNames::offsetAttr); 59 return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName); 60 } 61 62 void SVGStopElement::parseAttribute(const QualifiedName& name, const AtomicString& value) 63 { 64 if (!isSupportedAttribute(name)) { 65 SVGElement::parseAttribute(name, value); 66 return; 67 } 68 69 if (name == SVGNames::offsetAttr) { 70 if (value.endsWith('%')) 71 setOffsetBaseValue(value.string().left(value.length() - 1).toFloat() / 100.0f); 72 else 73 setOffsetBaseValue(value.toFloat()); 74 return; 75 } 76 77 ASSERT_NOT_REACHED(); 78 } 79 80 void SVGStopElement::svgAttributeChanged(const QualifiedName& attrName) 81 { 82 if (!isSupportedAttribute(attrName)) { 83 SVGElement::svgAttributeChanged(attrName); 84 return; 85 } 86 87 SVGElementInstance::InvalidationGuard invalidationGuard(this); 88 89 if (!renderer()) 90 return; 91 92 if (attrName == SVGNames::offsetAttr) { 93 RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer()); 94 return; 95 } 96 97 ASSERT_NOT_REACHED(); 98 } 99 100 RenderObject* SVGStopElement::createRenderer(RenderStyle*) 101 { 102 return new RenderSVGGradientStop(this); 103 } 104 105 bool SVGStopElement::rendererIsNeeded(const NodeRenderingContext&) 106 { 107 return true; 108 } 109 110 Color SVGStopElement::stopColorIncludingOpacity() const 111 { 112 RenderStyle* style = renderer() ? renderer()->style() : 0; 113 // FIXME: This check for null style exists to address Bug WK 90814, a rare crash condition in 114 // which the renderer or style is null. This entire class is scheduled for removal (Bug WK 86941) 115 // and we will tolerate this null check until then. 116 if (!style || !style->svgStyle()) 117 return Color(Color::transparent); // Transparent black. 118 119 const SVGRenderStyle* svgStyle = style->svgStyle(); 120 return colorWithOverrideAlpha(svgStyle->stopColor().rgb(), svgStyle->stopOpacity()); 121 } 122 123 } 124