/* * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis * Copyright (C) 2008-2019 Apple Inc. All rights reserved. * Copyright (C) 2008 Alp Toker * Copyright (C) 2009 Cameron McCormack * Copyright (C) 2013 Samsung Electronics. All rights reserved. * Copyright (C) 2014 Adobe Systems Incorporated. All rights reserved. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public License * along with this library; see the file COPYING.LIB. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301, USA. */ #include "config.h" #include "SVGElement.h" #include "CSSComputedStyleDeclaration.h" #include "CSSPrimitiveValueMappings.h" #include "CSSPropertyParser.h" #include "Document.h" #include "ElementChildIterator.h" #include "Event.h" #include "EventNames.h" #include "HTMLElement.h" #include "HTMLNames.h" #include "HTMLParserIdioms.h" #include "JSEventListener.h" #include "RenderAncestorIterator.h" #include "RenderSVGResourceFilter.h" #include "RenderSVGResourceMasker.h" #include "SVGDocumentExtensions.h" #include "SVGElementRareData.h" #include "SVGElementTypeHelpers.h" #include "SVGForeignObjectElement.h" #include "SVGGraphicsElement.h" #include "SVGImageElement.h" #include "SVGNames.h" #include "SVGPropertyAnimatorFactory.h" #include "SVGRenderStyle.h" #include "SVGRenderSupport.h" #include "SVGResourceElementClient.h" #include "SVGSVGElement.h" #include "SVGTitleElement.h" #include "SVGUseElement.h" #include "ShadowRoot.h" #include "StyleAdjuster.h" #include "XMLNames.h" #include #include #include #include #include namespace WebCore { WTF_MAKE_ISO_ALLOCATED_IMPL(SVGElement); static NEVER_INLINE MemoryCompactLookupOnlyRobinHoodHashMap createAttributeNameToCSSPropertyIDMap() { using namespace HTMLNames; using namespace SVGNames; // This list should include all base CSS and SVG CSS properties which are exposed as SVG XML attributes. static constexpr std::array attributeNames { &alignment_baselineAttr, &baseline_shiftAttr, &buffered_renderingAttr, &clipAttr, &clip_pathAttr, &clip_ruleAttr, &SVGNames::colorAttr, &color_interpolationAttr, &color_interpolation_filtersAttr, &cursorAttr, &cxAttr, &cyAttr, &SVGNames::directionAttr, &displayAttr, &dominant_baselineAttr, &fillAttr, &fill_opacityAttr, &fill_ruleAttr, &filterAttr, &flood_colorAttr, &flood_opacityAttr, &font_familyAttr, &font_sizeAttr, &font_stretchAttr, &font_styleAttr, &font_variantAttr, &font_weightAttr, &glyph_orientation_horizontalAttr, &glyph_orientation_verticalAttr, &image_renderingAttr, &SVGNames::heightAttr, &kerningAttr, &letter_spacingAttr, &lighting_colorAttr, &marker_endAttr, &marker_midAttr, &marker_startAttr, &maskAttr, &mask_typeAttr, &opacityAttr, &overflowAttr, &paint_orderAttr, &pointer_eventsAttr, &rAttr, &rxAttr, &ryAttr, &shape_renderingAttr, &stop_colorAttr, &stop_opacityAttr, &strokeAttr, &stroke_dasharrayAttr, &stroke_dashoffsetAttr, &stroke_linecapAttr, &stroke_linejoinAttr, &stroke_miterlimitAttr, &stroke_opacityAttr, &stroke_widthAttr, &text_anchorAttr, &text_decorationAttr, &text_renderingAttr, &unicode_bidiAttr, &vector_effectAttr, &visibilityAttr, &SVGNames::widthAttr, &word_spacingAttr, &writing_modeAttr, &xAttr, &yAttr, }; MemoryCompactLookupOnlyRobinHoodHashMap map; for (auto& name : attributeNames) { auto& localName = name->get().localName(); map.add(localName, cssPropertyID(localName)); } // FIXME: When CSS supports "transform-origin" this special case can be removed, // and we can add transform_originAttr to the table above instead. map.add(transform_originAttr->localName(), CSSPropertyTransformOrigin); return map; } SVGElement::SVGElement(const QualifiedName& tagName, Document& document, ConstructionType constructionType) : StyledElement(tagName, document, constructionType) , m_propertyAnimatorFactory(makeUnique()) { static std::once_flag onceFlag; std::call_once(onceFlag, [] { PropertyRegistry::registerProperty(); }); } SVGElement::~SVGElement() { if (m_svgRareData) { RELEASE_ASSERT(m_svgRareData->referencingElements().computesEmpty()); for (SVGElement& instance : copyToVectorOf>(instances())) instance.m_svgRareData->setCorrespondingElement(nullptr); RELEASE_ASSERT(!m_svgRareData->correspondingElement()); m_svgRareData = nullptr; } document().accessSVGExtensions().removeElementToRebuild(*this); } void SVGElement::willRecalcStyle(Style::Change change) { if (!m_svgRareData || styleResolutionShouldRecompositeLayer()) return; // If the style changes because of a regular property change (not induced by SMIL animations themselves) // reset the "computed style without SMIL style properties", so the base value change gets reflected. if (change > Style::Change::None || needsStyleRecalc()) m_svgRareData->setNeedsOverrideComputedStyleUpdate(); } SVGElementRareData& SVGElement::ensureSVGRareData() { if (!m_svgRareData) m_svgRareData = makeUnique(); return *m_svgRareData; } bool SVGElement::isOutermostSVGSVGElement() const { if (!is(*this)) return false; // Element may not be in the document, pretend we're outermost for viewport(), getCTM(), etc. if (!parentNode()) return true; // We act like an outermost SVG element, if we're a direct child of a element. if (is(*parentNode())) return true; // If we're inside the shadow tree of a element, we're always an inner element. if (isInShadowTree() && is(shadowHost())) return false; // This is true whenever this is the outermost SVG, even if there are HTML elements outside it return !is(*parentNode()); } void SVGElement::reportAttributeParsingError(SVGParsingError error, const QualifiedName& name, const AtomString& value) { if (error == NoError) return; String errorString = "<" + tagName() + "> attribute " + name.toString() + "=\"" + value + "\""; SVGDocumentExtensions& extensions = document().accessSVGExtensions(); if (error == NegativeValueForbiddenError) { extensions.reportError("Invalid negative value for " + errorString); return; } if (error == ParsingAttributeFailedError) { extensions.reportError("Invalid value for " + errorString); return; } ASSERT_NOT_REACHED(); } void SVGElement::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree) { if (removalType.disconnectedFromDocument) updateRelativeLengthsInformation(false, *this); StyledElement::removedFromAncestor(removalType, oldParentOfRemovedTree); if (removalType.disconnectedFromDocument) { auto& extensions = document().accessSVGExtensions(); if (m_svgRareData) { for (auto& element : m_svgRareData->takeReferencingElements()) { extensions.addElementToRebuild(element); Ref { element }->clearTarget(); } RELEASE_ASSERT(m_svgRareData->referencingElements().computesEmpty()); } extensions.removeElementToRebuild(*this); } invalidateInstances(); if (removalType.treeScopeChanged && oldParentOfRemovedTree.isUserAgentShadowRoot()) setCorrespondingElement(nullptr); } SVGSVGElement* SVGElement::ownerSVGElement() const { ContainerNode* node = parentOrShadowHostNode(); while (node) { if (is(*node)) return downcast(node); node = node->parentOrShadowHostNode(); } return nullptr; } SVGElement* SVGElement::viewportElement() const { // This function needs shadow tree support - as RenderSVGContainer uses this function // to determine the "overflow" property. on wouldn't work otherwhise. ContainerNode* node = parentOrShadowHostNode(); while (node) { if (is(*node) || is(*node) || node->hasTagName(SVGNames::symbolTag)) return downcast(node); node = node->parentOrShadowHostNode(); } return nullptr; } const WeakHashSet& SVGElement::instances() const { if (!m_svgRareData) { static NeverDestroyed> emptyInstances; return emptyInstances; } return m_svgRareData->instances(); } std::optional SVGElement::getBoundingBox() const { if (is(*this)) { if (auto renderer = this->renderer()) return renderer->objectBoundingBox(); } return std::nullopt; } Vector> SVGElement::referencingElements() const { if (!m_svgRareData) return { }; return copyToVectorOf>(m_svgRareData->referencingElements()); } void SVGElement::addReferencingElement(SVGElement& element) { ensureSVGRareData().addReferencingElement(element); auto& rareDataOfReferencingElement = element.ensureSVGRareData(); RELEASE_ASSERT(!rareDataOfReferencingElement.referenceTarget()); rareDataOfReferencingElement.setReferenceTarget(*this); } void SVGElement::removeReferencingElement(SVGElement& element) { ensureSVGRareData().removeReferencingElement(element); element.ensureSVGRareData().setReferenceTarget(nullptr); } void SVGElement::removeElementReference() { if (!m_svgRareData) return; if (RefPtr destination = m_svgRareData->referenceTarget()) destination->removeReferencingElement(*this); } Vector> SVGElement::referencingCSSClients() const { if (!m_svgRareData) return { }; return copyToVector(m_svgRareData->referencingCSSClients()); } void SVGElement::addReferencingCSSClient(SVGResourceElementClient& client) { ensureSVGRareData().addReferencingCSSClient(client); } void SVGElement::removeReferencingCSSClient(SVGResourceElementClient& client) { if (!m_svgRareData) return; ensureSVGRareData().removeReferencingCSSClient(client); } SVGElement* SVGElement::correspondingElement() const { return m_svgRareData ? m_svgRareData->correspondingElement() : nullptr; } RefPtr SVGElement::correspondingUseElement() const { auto* root = containingShadowRoot(); if (!root) return nullptr; if (root->mode() != ShadowRootMode::UserAgent) return nullptr; auto* host = root->host(); if (!is(host)) return nullptr; return &downcast(*host); } void SVGElement::setCorrespondingElement(SVGElement* correspondingElement) { if (m_svgRareData) { if (RefPtr oldCorrespondingElement = m_svgRareData->correspondingElement()) oldCorrespondingElement->m_svgRareData->removeInstance(*this); } if (m_svgRareData || correspondingElement) ensureSVGRareData().setCorrespondingElement(correspondingElement); if (correspondingElement) correspondingElement->ensureSVGRareData().addInstance(*this); } void SVGElement::parseAttribute(const QualifiedName& name, const AtomString& value) { if (name == HTMLNames::classAttr) { m_className->setBaseValInternal(value); return; } if (name == HTMLNames::tabindexAttr) { if (value.isEmpty()) setTabIndexExplicitly(std::nullopt); else if (auto optionalTabIndex = parseHTMLInteger(value)) setTabIndexExplicitly(optionalTabIndex.value()); return; } auto& eventName = HTMLElement::eventNameForEventHandlerAttribute(name); if (!eventName.isNull()) { setAttributeEventListener(eventName, name, value); return; } } bool SVGElement::haveLoadedRequiredResources() { for (auto& child : childrenOfType(*this)) { if (!child.haveLoadedRequiredResources()) return false; } return true; } bool SVGElement::addEventListener(const AtomString& eventType, Ref&& listener, const AddEventListenerOptions& options) { // Add event listener to regular DOM element if (!Node::addEventListener(eventType, listener.copyRef(), options)) return false; if (containingShadowRoot()) return true; // Add event listener to all shadow tree DOM element instances ASSERT(!instanceUpdatesBlocked()); for (auto& instance : copyToVectorOf>(instances())) { ASSERT(instance->correspondingElement() == this); ASSERT(instance->isInUserAgentShadowTree()); bool result = instance->Node::addEventListener(eventType, listener.copyRef(), options); ASSERT_UNUSED(result, result); } return true; } bool SVGElement::removeEventListener(const AtomString& eventType, EventListener& listener, const EventListenerOptions& options) { if (containingShadowRoot()) return Node::removeEventListener(eventType, listener, options); // EventTarget::removeEventListener creates a Ref around the given EventListener // object when creating a temporary RegisteredEventListener object used to look up the // event listener in a cache. If we want to be able to call removeEventListener() multiple // times on different nodes, we have to delay its immediate destruction, which would happen // after the first call below. Ref protector(listener); // Remove event listener from regular DOM element if (!Node::removeEventListener(eventType, listener, options)) return false; // Remove event listener from all shadow tree DOM element instances ASSERT(!instanceUpdatesBlocked()); for (auto& instance : copyToVectorOf>(instances())) { ASSERT(instance->correspondingElement() == this); ASSERT(instance->isInUserAgentShadowTree()); if (instance->Node::removeEventListener(eventType, listener, options)) continue; // This case can only be hit for event listeners created from markup ASSERT(JSEventListener::wasCreatedFromMarkup(listener)); // If the event listener 'listener' has been created from markup and has been fired before // then JSLazyEventListener::parseCode() has been called and m_jsFunction of that listener // has been created (read: it's not 0 anymore). During shadow tree creation, the event // listener DOM attribute has been cloned, and another event listener has been setup in // the shadow tree. If that event listener has not been used yet, m_jsFunction is still 0, // and tryRemoveEventListener() above will fail. Work around that very rare problem. ASSERT(instance->eventTargetData()); instance->eventTargetData()->eventListenerMap.removeFirstEventListenerCreatedFromMarkup(eventType); } return true; } static bool hasLoadListener(Element* element) { if (element->hasEventListeners(eventNames().loadEvent)) return true; for (element = element->parentOrShadowHostElement(); element; element = element->parentOrShadowHostElement()) { if (element->hasCapturingEventListeners(eventNames().loadEvent)) return true; } return false; } void SVGElement::sendLoadEventIfPossible() { if (!isConnected() || !document().frame()) return; if (!haveLoadedRequiredResources() || !hasLoadListener(this)) return; dispatchEvent(Event::create(eventNames().loadEvent, Event::CanBubble::No, Event::IsCancelable::No)); } void SVGElement::loadEventTimerFired() { sendLoadEventIfPossible(); } Timer* SVGElement::loadEventTimer() { ASSERT_NOT_REACHED(); return nullptr; } void SVGElement::finishParsingChildren() { StyledElement::finishParsingChildren(); if (isOutermostSVGSVGElement()) return; // Notify all the elements which have references to this element to rebuild their shadow and render // trees, e.g. a element references a target element before this target element is defined. invalidateInstances(); } #if ENABLE(LAYER_BASED_SVG_ENGINE) static MemoryCompactLookupOnlyRobinHoodHashSet createSVGLayerAwareElementSet() { // List of all SVG elements whose renderers support the layer aware layout / painting / hit-testing mode ('LBSE-mode'). using namespace SVGNames; MemoryCompactLookupOnlyRobinHoodHashSet set; const Vector allowedTags = { circleTag.get(), ellipseTag.get(), gTag.get(), pathTag.get(), rectTag.get(), textTag.get() }; for (auto& tag : allowedTags) set.add(tag.localName()); return set; } static inline bool isSVGLayerAwareElement(const SVGElement& element) { static NeverDestroyed> set = createSVGLayerAwareElementSet(); return set.get().contains(element.localName()); } #endif bool SVGElement::childShouldCreateRenderer(const Node& child) const { if (!child.isSVGElement()) return false; auto& svgChild = downcast(child); #if ENABLE(LAYER_BASED_SVG_ENGINE) // If the layer based SVG engine is enabled, all renderers that do not support the // RenderLayer aware layout / painting / hit-testing mode ('LBSE-mode') have to be skipped. // FIXME: [LBSE] Upstream support for all elements, and remove 'isSVGLayerAwareElement' check afterwards. if (document().settings().layerBasedSVGEngineEnabled()) return isSVGLayerAwareElement(svgChild); #endif static const QualifiedName* const invalidTextContent[] { &SVGNames::altGlyphTag.get(), &SVGNames::textPathTag.get(), &SVGNames::trefTag.get(), &SVGNames::tspanTag.get(), }; auto& name = svgChild.localName(); for (auto* tag : invalidTextContent) { if (name == tag->localName()) return false; } return svgChild.isValid(); } void SVGElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason) { StyledElement::attributeChanged(name, oldValue, newValue); if (name == HTMLNames::idAttr) document().accessSVGExtensions().rebuildAllElementReferencesForTarget(*this); // Changes to the style attribute are processed lazily (see Element::getAttribute() and related methods), // so we don't want changes to the style attribute to result in extra work here except invalidateInstances(). if (name == HTMLNames::styleAttr) invalidateInstances(); else svgAttributeChanged(name); } void SVGElement::synchronizeAttribute(const QualifiedName& name) { // If the value of the property has changed, serialize the new value to the attribute. if (auto value = propertyRegistry().synchronize(name)) setSynchronizedLazyAttribute(name, AtomString { *value }); } void SVGElement::synchronizeAllAttributes() { // SVGPropertyRegistry::synchronizeAllAttributes() returns the new values of // the properties which have changed but not committed yet. auto map = propertyRegistry().synchronizeAllAttributes(); for (const auto& entry : map) setSynchronizedLazyAttribute(entry.key, AtomString { entry.value }); } void SVGElement::commitPropertyChange(SVGProperty* property) { // We want to dirty the top-level property when a descendant changes. For example // a change in an SVGLength item in SVGLengthList should set the dirty flag on // SVGLengthList and not the SVGLength. property->setDirty(); setAnimatedSVGAttributesAreDirty(); svgAttributeChanged(propertyRegistry().propertyAttributeName(*property)); } void SVGElement::commitPropertyChange(SVGAnimatedProperty& animatedProperty) { QualifiedName attributeName = propertyRegistry().animatedPropertyAttributeName(animatedProperty); ASSERT(attributeName != nullQName()); // A change in a style property, e.g SVGRectElement::x should be serialized to // the attribute immediately. Otherwise it is okay to be lazy in this regard. if (!propertyRegistry().isAnimatedStylePropertyAttribute(attributeName)) propertyRegistry().setAnimatedPropertyDirty(attributeName, animatedProperty); else setSynchronizedLazyAttribute(attributeName, AtomString { animatedProperty.baseValAsString() }); setAnimatedSVGAttributesAreDirty(); svgAttributeChanged(attributeName); } bool SVGElement::isAnimatedPropertyAttribute(const QualifiedName& attributeName) const { return propertyRegistry().isAnimatedPropertyAttribute(attributeName); } bool SVGElement::isAnimatedAttribute(const QualifiedName& attributeName) const { return SVGPropertyAnimatorFactory::isKnownAttribute(attributeName) || isAnimatedPropertyAttribute(attributeName); } bool SVGElement::isAnimatedStyleAttribute(const QualifiedName& attributeName) const { return SVGPropertyAnimatorFactory::isKnownAttribute(attributeName) || propertyRegistry().isAnimatedStylePropertyAttribute(attributeName); } RefPtr SVGElement::createAnimator(const QualifiedName& attributeName, AnimationMode animationMode, CalcMode calcMode, bool isAccumulated, bool isAdditive) { // Property animator, e.g. "fill" or "fill-opacity". if (auto animator = propertyAnimatorFactory().createAnimator(attributeName, animationMode, calcMode, isAccumulated, isAdditive)) return animator; // Animated property animator. auto animator = propertyRegistry().createAnimator(attributeName, animationMode, calcMode, isAccumulated, isAdditive); if (!animator) return animator; for (auto& instance : copyToVectorOf>(instances())) instance->propertyRegistry().appendAnimatedInstance(attributeName, *animator); return animator; } void SVGElement::animatorWillBeDeleted(const QualifiedName& attributeName) { propertyAnimatorFactory().animatorWillBeDeleted(attributeName); } std::optional SVGElement::resolveCustomStyle(const Style::ResolutionContext& resolutionContext, const RenderStyle*) { // If the element is in a tree we get the style from the definition tree. if (RefPtr styleElement = this->correspondingElement()) { auto styleElementResolutionContext = resolutionContext; // Can't use the state since we are going to another part of the tree. styleElementResolutionContext.selectorMatchingState = nullptr; auto style = styleElement->resolveStyle(styleElementResolutionContext); Style::Adjuster::adjustSVGElementStyle(*style.renderStyle, *this); return style; } return resolveStyle(resolutionContext); } MutableStyleProperties* SVGElement::animatedSMILStyleProperties() const { if (m_svgRareData) return m_svgRareData->animatedSMILStyleProperties(); return 0; } MutableStyleProperties& SVGElement::ensureAnimatedSMILStyleProperties() { return ensureSVGRareData().ensureAnimatedSMILStyleProperties(); } void SVGElement::setUseOverrideComputedStyle(bool value) { if (m_svgRareData) m_svgRareData->setUseOverrideComputedStyle(value); } const RenderStyle* SVGElement::computedStyle(PseudoId pseudoElementSpecifier) { if (!m_svgRareData || !m_svgRareData->useOverrideComputedStyle()) return Element::computedStyle(pseudoElementSpecifier); const RenderStyle* parentStyle = nullptr; if (RefPtr parent = parentOrShadowHostElement()) { if (auto renderer = parent->renderer()) parentStyle = &renderer->style(); } return m_svgRareData->overrideComputedStyle(*this, parentStyle); } ColorInterpolation SVGElement::colorInterpolation() const { if (auto renderer = this->renderer()) return renderer->style().svgStyle().colorInterpolationFilters(); // Try to determine the property value from the computed style. if (auto value = ComputedStyleExtractor(const_cast(this)).propertyValue(CSSPropertyColorInterpolationFilters, DoNotUpdateLayout)) { if (is(value)) return downcast(*value); } return ColorInterpolation::Auto; } QualifiedName SVGElement::animatableAttributeForName(const AtomString& localName) { static NeverDestroyed animatableAttributes = [] { static constexpr std::array names { &HTMLNames::classAttr, &SVGNames::amplitudeAttr, &SVGNames::azimuthAttr, &SVGNames::baseFrequencyAttr, &SVGNames::biasAttr, &SVGNames::clipPathUnitsAttr, &SVGNames::cxAttr, &SVGNames::cyAttr, &SVGNames::diffuseConstantAttr, &SVGNames::divisorAttr, &SVGNames::dxAttr, &SVGNames::dyAttr, &SVGNames::edgeModeAttr, &SVGNames::elevationAttr, &SVGNames::exponentAttr, &SVGNames::externalResourcesRequiredAttr, &SVGNames::filterUnitsAttr, &SVGNames::fxAttr, &SVGNames::fyAttr, &SVGNames::gradientTransformAttr, &SVGNames::gradientUnitsAttr, &SVGNames::heightAttr, &SVGNames::in2Attr, &SVGNames::inAttr, &SVGNames::interceptAttr, &SVGNames::k1Attr, &SVGNames::k2Attr, &SVGNames::k3Attr, &SVGNames::k4Attr, &SVGNames::kernelMatrixAttr, &SVGNames::kernelUnitLengthAttr, &SVGNames::lengthAdjustAttr, &SVGNames::limitingConeAngleAttr, &SVGNames::markerHeightAttr, &SVGNames::markerUnitsAttr, &SVGNames::markerWidthAttr, &SVGNames::maskContentUnitsAttr, &SVGNames::maskUnitsAttr, &SVGNames::methodAttr, &SVGNames::modeAttr, &SVGNames::numOctavesAttr, &SVGNames::offsetAttr, &SVGNames::operatorAttr, &SVGNames::orderAttr, &SVGNames::orientAttr, &SVGNames::pathLengthAttr, &SVGNames::patternContentUnitsAttr, &SVGNames::patternTransformAttr, &SVGNames::patternUnitsAttr, &SVGNames::pointsAtXAttr, &SVGNames::pointsAtYAttr, &SVGNames::pointsAtZAttr, &SVGNames::preserveAlphaAttr, &SVGNames::preserveAspectRatioAttr, &SVGNames::primitiveUnitsAttr, &SVGNames::radiusAttr, &SVGNames::rAttr, &SVGNames::refXAttr, &SVGNames::refYAttr, &SVGNames::resultAttr, &SVGNames::rotateAttr, &SVGNames::rxAttr, &SVGNames::ryAttr, &SVGNames::scaleAttr, &SVGNames::seedAttr, &SVGNames::slopeAttr, &SVGNames::spacingAttr, &SVGNames::specularConstantAttr, &SVGNames::specularExponentAttr, &SVGNames::spreadMethodAttr, &SVGNames::startOffsetAttr, &SVGNames::stdDeviationAttr, &SVGNames::stitchTilesAttr, &SVGNames::surfaceScaleAttr, &SVGNames::tableValuesAttr, &SVGNames::targetAttr, &SVGNames::targetXAttr, &SVGNames::targetYAttr, &SVGNames::transformAttr, &SVGNames::typeAttr, &SVGNames::valuesAttr, &SVGNames::viewBoxAttr, &SVGNames::widthAttr, &SVGNames::x1Attr, &SVGNames::x2Attr, &SVGNames::xAttr, &SVGNames::xChannelSelectorAttr, &SVGNames::y1Attr, &SVGNames::y2Attr, &SVGNames::yAttr, &SVGNames::yChannelSelectorAttr, &SVGNames::zAttr, &SVGNames::hrefAttr, }; MemoryCompactLookupOnlyRobinHoodHashMap map; for (auto& name : names) { auto addResult = map.add(name->get().localName(), *name); ASSERT_UNUSED(addResult, addResult.isNewEntry); } return map; }(); return animatableAttributes.get().get(localName); } #ifndef NDEBUG bool SVGElement::isAnimatableAttribute(const QualifiedName& name) const { if (animatableAttributeForName(name.localName()) == name) return !filterOutAnimatableAttribute(name); return false; } bool SVGElement::filterOutAnimatableAttribute(const QualifiedName&) const { return false; } #endif String SVGElement::title() const { // According to spec, for stand-alone SVG documents we should not return a title when // hovering over the rootmost SVG element (the first element is the title of // the document, not a tooltip) so we instantly return. if (isOutermostSVGSVGElement() && document().topDocument().isSVGDocument()) return String(); auto firstTitle = childrenOfType(*this).first(); return firstTitle ? const_cast(firstTitle)->innerText() : String(); } bool SVGElement::rendererIsNeeded(const RenderStyle& style) { // http://www.w3.org/TR/SVG/extend.html#PrivateData // Prevent anything other than SVG renderers from appearing in our render tree // Spec: SVG allows inclusion of elements from foreign namespaces anywhere // with the SVG content. In general, the SVG user agent will include the unknown // elements in the DOM but will otherwise ignore unknown elements. if (!parentOrShadowHostElement() || is(*parentOrShadowHostElement())) return StyledElement::rendererIsNeeded(style); return false; } CSSPropertyID SVGElement::cssPropertyIdForSVGAttributeName(const QualifiedName& attrName) { if (!attrName.namespaceURI().isNull()) return CSSPropertyInvalid; static NeverDestroyed properties = createAttributeNameToCSSPropertyIDMap(); return properties.get().get(attrName.localName()); } bool SVGElement::hasPresentationalHintsForAttribute(const QualifiedName& name) const { if (cssPropertyIdForSVGAttributeName(name) > 0) return true; return StyledElement::hasPresentationalHintsForAttribute(name); } void SVGElement::collectPresentationalHintsForAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style) { CSSPropertyID propertyID = cssPropertyIdForSVGAttributeName(name); if (propertyID > 0) addPropertyToPresentationalHintStyle(style, propertyID, value); } void SVGElement::updateSVGRendererForElementChange() { document().updateSVGRenderer(*this); } void SVGElement::svgAttributeChanged(const QualifiedName& attrName) { CSSPropertyID propId = cssPropertyIdForSVGAttributeName(attrName); if (propId > 0) { invalidateInstances(); return; } if (attrName == HTMLNames::classAttr) { classAttributeChanged(className()); invalidateInstances(); return; } if (attrName == HTMLNames::idAttr) { auto renderer = this->renderer(); // Notify resources about id changes, this is important as we cache resources by id in SVGDocumentExtensions if (is(renderer)) downcast(*renderer).idChanged(); if (isConnected()) buildPendingResourcesIfNeeded(); invalidateInstances(); return; } } Node::InsertedIntoAncestorResult SVGElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree) { StyledElement::insertedIntoAncestor(insertionType, parentOfInsertedTree); updateRelativeLengthsInformation(); if (needsPendingResourceHandling() && insertionType.connectedToDocument && !isInShadowTree()) { SVGDocumentExtensions& extensions = document().accessSVGExtensions(); auto& resourceId = getIdAttribute(); if (extensions.isIdOfPendingResource(resourceId)) return InsertedIntoAncestorResult::NeedsPostInsertionCallback; } hideNonce(); return InsertedIntoAncestorResult::Done; } void SVGElement::didFinishInsertingNode() { buildPendingResourcesIfNeeded(); } void SVGElement::buildPendingResourcesIfNeeded() { if (!needsPendingResourceHandling() || !isConnected() || isInShadowTree()) return; SVGDocumentExtensions& extensions = document().accessSVGExtensions(); auto resourceId = getIdAttribute(); if (!extensions.isIdOfPendingResource(resourceId)) return; // Mark pending resources as pending for removal. extensions.markPendingResourcesForRemoval(resourceId); // Rebuild pending resources for each client of a pending resource that is being removed. while (auto clientElement = extensions.takeElementFromPendingResourcesForRemovalMap(resourceId)) { ASSERT(clientElement->hasPendingResources()); if (clientElement->hasPendingResources()) { clientElement->buildPendingResource(); if (auto renderer = clientElement->renderer()) { for (auto& ancestor : ancestorsOfType(*renderer)) ancestor.markAllClientsForRepaint(); } extensions.clearHasPendingResourcesIfPossible(*clientElement); } } } void SVGElement::childrenChanged(const ChildChange& change) { StyledElement::childrenChanged(change); if (change.source == ChildChange::Source::Parser) return; invalidateInstances(); } bool SVGElement::instanceUpdatesBlocked() const { return m_svgRareData && m_svgRareData->instanceUpdatesBlocked(); } void SVGElement::setInstanceUpdatesBlocked(bool value) { // Catch any callers that calls setInstanceUpdatesBlocked(true) twice in a row. // That probably indicates nested use of InstanceUpdateBlocker and a bug. ASSERT(!value || !instanceUpdatesBlocked()); if (m_svgRareData) m_svgRareData->setInstanceUpdatesBlocked(value); } AffineTransform SVGElement::localCoordinateSpaceTransform(SVGLocatable::CTMScope) const { // To be overridden by SVGGraphicsElement (or as special case SVGTextElement and SVGPatternElement) return AffineTransform(); } void SVGElement::updateRelativeLengthsInformation(bool hasRelativeLengths, SVGElement& element) { // If we're not yet in a document, this function will be called again from insertedIntoAncestor(). Do nothing now. if (!isConnected()) return; // An element wants to notify us that its own relative lengths state changed. // Register it in the relative length map, and register us in the parent relative length map. // Register the parent in the grandparents map, etc. Repeat procedure until the root of the SVG tree. if (hasRelativeLengths) m_elementsWithRelativeLengths.add(element); else { bool neverRegistered = !m_elementsWithRelativeLengths.contains(element); if (neverRegistered) return; m_elementsWithRelativeLengths.remove(element); } if (is(element)) { if (RefPtr parent = parentNode(); is(parent)) downcast(*parent).updateRelativeLengthsInformation(hasRelativeLengths, *this); } } bool SVGElement::accessKeyAction(bool sendMouseEvents) { return dispatchSimulatedClick(0, sendMouseEvents ? SendMouseUpDownEvents : SendNoEvents); } void SVGElement::invalidateInstances() { if (instanceUpdatesBlocked()) return; for (auto& instance : copyToVectorOf>(instances())) { if (auto useElement = instance->correspondingUseElement()) useElement->invalidateShadowTree(); instance->setCorrespondingElement(nullptr); } } }