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 23#if ENABLE(SVG) 24#include "SVGTextPathElement.h" 25 26#include "Attribute.h" 27#include "NodeRenderingContext.h" 28#include "RenderSVGResource.h" 29#include "RenderSVGTextPath.h" 30#include "SVGElementInstance.h" 31#include "SVGNames.h" 32 33namespace WebCore { 34 35// Animated property definitions 36DEFINE_ANIMATED_LENGTH(SVGTextPathElement, SVGNames::startOffsetAttr, StartOffset, startOffset) 37DEFINE_ANIMATED_ENUMERATION(SVGTextPathElement, SVGNames::methodAttr, Method, method, SVGTextPathMethodType) 38DEFINE_ANIMATED_ENUMERATION(SVGTextPathElement, SVGNames::spacingAttr, Spacing, spacing, SVGTextPathSpacingType) 39DEFINE_ANIMATED_STRING(SVGTextPathElement, XLinkNames::hrefAttr, Href, href) 40 41BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGTextPathElement) 42 REGISTER_LOCAL_ANIMATED_PROPERTY(startOffset) 43 REGISTER_LOCAL_ANIMATED_PROPERTY(method) 44 REGISTER_LOCAL_ANIMATED_PROPERTY(spacing) 45 REGISTER_LOCAL_ANIMATED_PROPERTY(href) 46 REGISTER_PARENT_ANIMATED_PROPERTIES(SVGTextContentElement) 47END_REGISTER_ANIMATED_PROPERTIES 48 49inline SVGTextPathElement::SVGTextPathElement(const QualifiedName& tagName, Document* document) 50 : SVGTextContentElement(tagName, document) 51 , m_startOffset(LengthModeOther) 52 , m_method(SVGTextPathMethodAlign) 53 , m_spacing(SVGTextPathSpacingExact) 54{ 55 ASSERT(hasTagName(SVGNames::textPathTag)); 56 registerAnimatedPropertiesForSVGTextPathElement(); 57} 58 59PassRefPtr<SVGTextPathElement> SVGTextPathElement::create(const QualifiedName& tagName, Document* document) 60{ 61 return adoptRef(new SVGTextPathElement(tagName, document)); 62} 63 64SVGTextPathElement::~SVGTextPathElement() 65{ 66 clearResourceReferences(); 67} 68 69void SVGTextPathElement::clearResourceReferences() 70{ 71 ASSERT(document()); 72 document()->accessSVGExtensions()->removeAllTargetReferencesForElement(this); 73} 74 75bool SVGTextPathElement::isSupportedAttribute(const QualifiedName& attrName) 76{ 77 DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ()); 78 if (supportedAttributes.isEmpty()) { 79 SVGURIReference::addSupportedAttributes(supportedAttributes); 80 supportedAttributes.add(SVGNames::startOffsetAttr); 81 supportedAttributes.add(SVGNames::methodAttr); 82 supportedAttributes.add(SVGNames::spacingAttr); 83 } 84 return supportedAttributes.contains<QualifiedName, SVGAttributeHashTranslator>(attrName); 85} 86 87void SVGTextPathElement::parseAttribute(const QualifiedName& name, const AtomicString& value) 88{ 89 SVGParsingError parseError = NoError; 90 91 if (!isSupportedAttribute(name)) 92 SVGTextContentElement::parseAttribute(name, value); 93 else if (name == SVGNames::startOffsetAttr) 94 setStartOffsetBaseValue(SVGLength::construct(LengthModeOther, value, parseError)); 95 else if (name == SVGNames::methodAttr) { 96 SVGTextPathMethodType propertyValue = SVGPropertyTraits<SVGTextPathMethodType>::fromString(value); 97 if (propertyValue > 0) 98 setMethodBaseValue(propertyValue); 99 } else if (name == SVGNames::spacingAttr) { 100 SVGTextPathSpacingType propertyValue = SVGPropertyTraits<SVGTextPathSpacingType>::fromString(value); 101 if (propertyValue > 0) 102 setSpacingBaseValue(propertyValue); 103 } else if (SVGURIReference::parseAttribute(name, value)) { 104 } else 105 ASSERT_NOT_REACHED(); 106 107 reportAttributeParsingError(parseError, name, value); 108} 109 110void SVGTextPathElement::svgAttributeChanged(const QualifiedName& attrName) 111{ 112 if (!isSupportedAttribute(attrName)) { 113 SVGTextContentElement::svgAttributeChanged(attrName); 114 return; 115 } 116 117 SVGElementInstance::InvalidationGuard invalidationGuard(this); 118 119 if (SVGURIReference::isKnownAttribute(attrName)) { 120 buildPendingResource(); 121 return; 122 } 123 124 if (attrName == SVGNames::startOffsetAttr) 125 updateRelativeLengthsInformation(); 126 127 if (RenderObject* object = renderer()) 128 RenderSVGResource::markForLayoutAndParentResourceInvalidation(object); 129} 130 131RenderObject* SVGTextPathElement::createRenderer(RenderArena* arena, RenderStyle*) 132{ 133 return new (arena) RenderSVGTextPath(this); 134} 135 136bool SVGTextPathElement::childShouldCreateRenderer(const NodeRenderingContext& childContext) const 137{ 138 if (childContext.node()->isTextNode() 139 || childContext.node()->hasTagName(SVGNames::aTag) 140 || childContext.node()->hasTagName(SVGNames::trefTag) 141 || childContext.node()->hasTagName(SVGNames::tspanTag)) 142 return true; 143 144 return false; 145} 146 147bool SVGTextPathElement::rendererIsNeeded(const NodeRenderingContext& context) 148{ 149 if (parentNode() 150 && (parentNode()->hasTagName(SVGNames::aTag) 151 || parentNode()->hasTagName(SVGNames::textTag))) 152 return StyledElement::rendererIsNeeded(context); 153 154 return false; 155} 156 157void SVGTextPathElement::buildPendingResource() 158{ 159 clearResourceReferences(); 160 if (!inDocument()) 161 return; 162 163 String id; 164 Element* target = SVGURIReference::targetElementFromIRIString(href(), document(), &id); 165 if (!target) { 166 // Do not register as pending if we are already pending this resource. 167 if (document()->accessSVGExtensions()->isElementPendingResource(this, id)) 168 return; 169 170 if (!id.isEmpty()) { 171 document()->accessSVGExtensions()->addPendingResource(id, this); 172 ASSERT(hasPendingResources()); 173 } 174 } else if (target->hasTagName(SVGNames::pathTag)) { 175 // Register us with the target in the dependencies map. Any change of hrefElement 176 // that leads to relayout/repainting now informs us, so we can react to it. 177 document()->accessSVGExtensions()->addElementReferencingTarget(this, toSVGElement(target)); 178 } 179} 180 181Node::InsertionNotificationRequest SVGTextPathElement::insertedInto(ContainerNode* rootParent) 182{ 183 SVGTextContentElement::insertedInto(rootParent); 184 return InsertionShouldCallDidNotifySubtreeInsertions; 185} 186 187void SVGTextPathElement::didNotifySubtreeInsertions(ContainerNode*) 188{ 189 buildPendingResource(); 190} 191 192void SVGTextPathElement::removedFrom(ContainerNode* rootParent) 193{ 194 SVGTextContentElement::removedFrom(rootParent); 195 if (rootParent->inDocument()) 196 clearResourceReferences(); 197} 198 199bool SVGTextPathElement::selfHasRelativeLengths() const 200{ 201 return startOffset().isRelative() 202 || SVGTextContentElement::selfHasRelativeLengths(); 203} 204 205} 206 207#endif // ENABLE(SVG) 208