1/* 2 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org> 3 * Copyright (C) 2010 Rob Buis <rwlbuis@gmail.com> 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 "SVGTextPathElement.h" 23 24#include "Attribute.h" 25#include "RenderSVGResource.h" 26#include "RenderSVGTextPath.h" 27#include "SVGElementInstance.h" 28#include "SVGNames.h" 29#include "XLinkNames.h" 30#include <wtf/NeverDestroyed.h> 31 32namespace WebCore { 33 34// Animated property definitions 35DEFINE_ANIMATED_LENGTH(SVGTextPathElement, SVGNames::startOffsetAttr, StartOffset, startOffset) 36DEFINE_ANIMATED_ENUMERATION(SVGTextPathElement, SVGNames::methodAttr, Method, method, SVGTextPathMethodType) 37DEFINE_ANIMATED_ENUMERATION(SVGTextPathElement, SVGNames::spacingAttr, Spacing, spacing, SVGTextPathSpacingType) 38DEFINE_ANIMATED_STRING(SVGTextPathElement, XLinkNames::hrefAttr, Href, href) 39 40BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGTextPathElement) 41 REGISTER_LOCAL_ANIMATED_PROPERTY(startOffset) 42 REGISTER_LOCAL_ANIMATED_PROPERTY(method) 43 REGISTER_LOCAL_ANIMATED_PROPERTY(spacing) 44 REGISTER_LOCAL_ANIMATED_PROPERTY(href) 45 REGISTER_PARENT_ANIMATED_PROPERTIES(SVGTextContentElement) 46END_REGISTER_ANIMATED_PROPERTIES 47 48inline SVGTextPathElement::SVGTextPathElement(const QualifiedName& tagName, Document& document) 49 : SVGTextContentElement(tagName, document) 50 , m_startOffset(LengthModeOther) 51 , m_method(SVGTextPathMethodAlign) 52 , m_spacing(SVGTextPathSpacingExact) 53{ 54 ASSERT(hasTagName(SVGNames::textPathTag)); 55 registerAnimatedPropertiesForSVGTextPathElement(); 56} 57 58PassRefPtr<SVGTextPathElement> SVGTextPathElement::create(const QualifiedName& tagName, Document& document) 59{ 60 return adoptRef(new SVGTextPathElement(tagName, document)); 61} 62 63SVGTextPathElement::~SVGTextPathElement() 64{ 65 clearResourceReferences(); 66} 67 68void SVGTextPathElement::clearResourceReferences() 69{ 70 document().accessSVGExtensions()->removeAllTargetReferencesForElement(this); 71} 72 73bool SVGTextPathElement::isSupportedAttribute(const QualifiedName& attrName) 74{ 75 static NeverDestroyed<HashSet<QualifiedName>> supportedAttributes; 76 if (supportedAttributes.get().isEmpty()) { 77 SVGURIReference::addSupportedAttributes(supportedAttributes); 78 supportedAttributes.get().add(SVGNames::startOffsetAttr); 79 supportedAttributes.get().add(SVGNames::methodAttr); 80 supportedAttributes.get().add(SVGNames::spacingAttr); 81 } 82 return supportedAttributes.get().contains<SVGAttributeHashTranslator>(attrName); 83} 84 85void SVGTextPathElement::parseAttribute(const QualifiedName& name, const AtomicString& value) 86{ 87 SVGParsingError parseError = NoError; 88 89 if (!isSupportedAttribute(name)) 90 SVGTextContentElement::parseAttribute(name, value); 91 else if (name == SVGNames::startOffsetAttr) 92 setStartOffsetBaseValue(SVGLength::construct(LengthModeOther, value, parseError)); 93 else if (name == SVGNames::methodAttr) { 94 SVGTextPathMethodType propertyValue = SVGPropertyTraits<SVGTextPathMethodType>::fromString(value); 95 if (propertyValue > 0) 96 setMethodBaseValue(propertyValue); 97 } else if (name == SVGNames::spacingAttr) { 98 SVGTextPathSpacingType propertyValue = SVGPropertyTraits<SVGTextPathSpacingType>::fromString(value); 99 if (propertyValue > 0) 100 setSpacingBaseValue(propertyValue); 101 } else if (SVGURIReference::parseAttribute(name, value)) { 102 } else 103 ASSERT_NOT_REACHED(); 104 105 reportAttributeParsingError(parseError, name, value); 106} 107 108void SVGTextPathElement::svgAttributeChanged(const QualifiedName& attrName) 109{ 110 if (!isSupportedAttribute(attrName)) { 111 SVGTextContentElement::svgAttributeChanged(attrName); 112 return; 113 } 114 115 SVGElementInstance::InvalidationGuard invalidationGuard(this); 116 117 if (SVGURIReference::isKnownAttribute(attrName)) { 118 buildPendingResource(); 119 return; 120 } 121 122 if (attrName == SVGNames::startOffsetAttr) 123 updateRelativeLengthsInformation(); 124 125 if (auto renderer = this->renderer()) 126 RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer); 127} 128 129RenderPtr<RenderElement> SVGTextPathElement::createElementRenderer(PassRef<RenderStyle> style) 130{ 131 return createRenderer<RenderSVGTextPath>(*this, WTF::move(style)); 132} 133 134bool SVGTextPathElement::childShouldCreateRenderer(const Node& child) const 135{ 136 if (child.isTextNode() 137 || child.hasTagName(SVGNames::aTag) 138 || child.hasTagName(SVGNames::trefTag) 139 || child.hasTagName(SVGNames::tspanTag)) 140 return true; 141 142 return false; 143} 144 145bool SVGTextPathElement::rendererIsNeeded(const RenderStyle& style) 146{ 147 if (parentNode() 148 && (parentNode()->hasTagName(SVGNames::aTag) 149 || parentNode()->hasTagName(SVGNames::textTag))) 150 return StyledElement::rendererIsNeeded(style); 151 152 return false; 153} 154 155void SVGTextPathElement::buildPendingResource() 156{ 157 clearResourceReferences(); 158 if (!inDocument()) 159 return; 160 161 String id; 162 Element* target = SVGURIReference::targetElementFromIRIString(href(), document(), &id); 163 if (!target) { 164 // Do not register as pending if we are already pending this resource. 165 if (document().accessSVGExtensions()->isPendingResource(this, id)) 166 return; 167 168 if (!id.isEmpty()) { 169 document().accessSVGExtensions()->addPendingResource(id, this); 170 ASSERT(hasPendingResources()); 171 } 172 } else if (target->hasTagName(SVGNames::pathTag)) { 173 // Register us with the target in the dependencies map. Any change of hrefElement 174 // that leads to relayout/repainting now informs us, so we can react to it. 175 document().accessSVGExtensions()->addElementReferencingTarget(this, toSVGElement(target)); 176 } 177} 178 179Node::InsertionNotificationRequest SVGTextPathElement::insertedInto(ContainerNode& rootParent) 180{ 181 SVGTextContentElement::insertedInto(rootParent); 182 return InsertionShouldCallDidNotifySubtreeInsertions; 183} 184 185void SVGTextPathElement::didNotifySubtreeInsertions(ContainerNode*) 186{ 187 buildPendingResource(); 188} 189 190void SVGTextPathElement::removedFrom(ContainerNode& rootParent) 191{ 192 SVGTextContentElement::removedFrom(rootParent); 193 if (rootParent.inDocument()) 194 clearResourceReferences(); 195} 196 197bool SVGTextPathElement::selfHasRelativeLengths() const 198{ 199 return startOffset().isRelative() 200 || SVGTextContentElement::selfHasRelativeLengths(); 201} 202 203} 204