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#include "SVGStopElement.h" 23 24#include "Attribute.h" 25#include "Document.h" 26#include "RenderSVGGradientStop.h" 27#include "RenderSVGResource.h" 28#include "SVGElementInstance.h" 29#include "SVGGradientElement.h" 30#include "SVGNames.h" 31#include <wtf/NeverDestroyed.h> 32 33namespace WebCore { 34 35// Animated property definitions 36DEFINE_ANIMATED_NUMBER(SVGStopElement, SVGNames::offsetAttr, Offset, offset) 37 38BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGStopElement) 39 REGISTER_LOCAL_ANIMATED_PROPERTY(offset) 40 REGISTER_PARENT_ANIMATED_PROPERTIES(SVGElement) 41END_REGISTER_ANIMATED_PROPERTIES 42 43inline SVGStopElement::SVGStopElement(const QualifiedName& tagName, Document& document) 44 : SVGElement(tagName, document) 45 , m_offset(0) 46{ 47 ASSERT(hasTagName(SVGNames::stopTag)); 48 registerAnimatedPropertiesForSVGStopElement(); 49} 50 51PassRefPtr<SVGStopElement> SVGStopElement::create(const QualifiedName& tagName, Document& document) 52{ 53 return adoptRef(new SVGStopElement(tagName, document)); 54} 55 56bool SVGStopElement::isSupportedAttribute(const QualifiedName& attrName) 57{ 58 static NeverDestroyed<HashSet<QualifiedName>> supportedAttributes; 59 if (supportedAttributes.get().isEmpty()) 60 supportedAttributes.get().add(SVGNames::offsetAttr); 61 return supportedAttributes.get().contains<SVGAttributeHashTranslator>(attrName); 62} 63 64void SVGStopElement::parseAttribute(const QualifiedName& name, const AtomicString& value) 65{ 66 if (!isSupportedAttribute(name)) { 67 SVGElement::parseAttribute(name, value); 68 return; 69 } 70 71 if (name == SVGNames::offsetAttr) { 72 if (value.endsWith('%')) 73 setOffsetBaseValue(value.string().left(value.length() - 1).toFloat() / 100.0f); 74 else 75 setOffsetBaseValue(value.toFloat()); 76 return; 77 } 78 79 ASSERT_NOT_REACHED(); 80} 81 82void SVGStopElement::svgAttributeChanged(const QualifiedName& attrName) 83{ 84 if (!isSupportedAttribute(attrName)) { 85 SVGElement::svgAttributeChanged(attrName); 86 return; 87 } 88 89 SVGElementInstance::InvalidationGuard invalidationGuard(this); 90 91 if (attrName == SVGNames::offsetAttr) { 92 if (auto renderer = this->renderer()) 93 RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer); 94 return; 95 } 96 97 ASSERT_NOT_REACHED(); 98} 99 100RenderPtr<RenderElement> SVGStopElement::createElementRenderer(PassRef<RenderStyle> style) 101{ 102 return createRenderer<RenderSVGGradientStop>(*this, WTF::move(style)); 103} 104 105bool SVGStopElement::rendererIsNeeded(const RenderStyle&) 106{ 107 return true; 108} 109 110Color SVGStopElement::stopColorIncludingOpacity() const 111{ 112 RenderStyle* style = renderer() ? &renderer()->style() : nullptr; 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) 117 return Color(Color::transparent, true); // Transparent black. 118 119 const SVGRenderStyle& svgStyle = style->svgStyle(); 120 return colorWithOverrideAlpha(svgStyle.stopColor().rgb(), svgStyle.stopOpacity()); 121} 122 123} 124