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-rw-r--r--Source/WebCore/svg/SVGUseElement.cpp1048
1 files changed, 330 insertions, 718 deletions
diff --git a/Source/WebCore/svg/SVGUseElement.cpp b/Source/WebCore/svg/SVGUseElement.cpp
index a45910643..e1a8ef787 100644
--- a/Source/WebCore/svg/SVGUseElement.cpp
+++ b/Source/WebCore/svg/SVGUseElement.cpp
@@ -5,6 +5,7 @@
* Copyright (C) 2011 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
* Copyright (C) 2012 University of Szeged
* Copyright (C) 2012 Renata Hodovan <reni@webkit.org>
+ * Copyright (C) 2015 Apple Inc. 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
@@ -23,46 +24,23 @@
*/
#include "config.h"
-
-#if ENABLE(SVG)
#include "SVGUseElement.h"
#include "CachedResourceLoader.h"
-#include "CachedResourceRequest.h"
#include "CachedSVGDocument.h"
-#include "Document.h"
#include "ElementIterator.h"
#include "Event.h"
-#include "EventListener.h"
-#include "HTMLNames.h"
-#include "NodeRenderStyle.h"
-#include "RegisteredEventListener.h"
+#include "EventNames.h"
#include "RenderSVGResource.h"
#include "RenderSVGTransformableContainer.h"
#include "ShadowRoot.h"
-#include "SVGElementInstance.h"
-#include "SVGElementRareData.h"
-#include "SVGElementInstanceList.h"
#include "SVGGElement.h"
-#include "SVGLengthContext.h"
-#include "SVGNames.h"
-#include "SVGSMILElement.h"
#include "SVGSVGElement.h"
#include "SVGSymbolElement.h"
-#include "StyleResolver.h"
#include "XLinkNames.h"
-#include "XMLDocumentParser.h"
-#include "XMLSerializer.h"
-
-// Dump SVGElementInstance object tree - useful to debug instanceRoot problems
-// #define DUMP_INSTANCE_TREE
-
-// Dump the deep-expanded shadow tree (where the renderers are built from)
-// #define DUMP_SHADOW_TREE
namespace WebCore {
-// Animated property definitions
DEFINE_ANIMATED_LENGTH(SVGUseElement, SVGNames::xAttr, X, x)
DEFINE_ANIMATED_LENGTH(SVGUseElement, SVGNames::yAttr, Y, y)
DEFINE_ANIMATED_LENGTH(SVGUseElement, SVGNames::widthAttr, Width, width)
@@ -80,158 +58,106 @@ BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGUseElement)
REGISTER_PARENT_ANIMATED_PROPERTIES(SVGGraphicsElement)
END_REGISTER_ANIMATED_PROPERTIES
-inline SVGUseElement::SVGUseElement(const QualifiedName& tagName, Document& document, bool wasInsertedByParser)
+inline SVGUseElement::SVGUseElement(const QualifiedName& tagName, Document& document)
: SVGGraphicsElement(tagName, document)
, m_x(LengthModeWidth)
, m_y(LengthModeHeight)
, m_width(LengthModeWidth)
, m_height(LengthModeHeight)
- , m_wasInsertedByParser(wasInsertedByParser)
- , m_haveFiredLoadEvent(false)
- , m_needsShadowTreeRecreation(false)
- , m_svgLoadEventTimer(this, &SVGElement::svgLoadEventTimerFired)
+ , m_svgLoadEventTimer(*this, &SVGElement::svgLoadEventTimerFired)
{
ASSERT(hasCustomStyleResolveCallbacks());
ASSERT(hasTagName(SVGNames::useTag));
registerAnimatedPropertiesForSVGUseElement();
}
-PassRefPtr<SVGUseElement> SVGUseElement::create(const QualifiedName& tagName, Document& document, bool wasInsertedByParser)
+Ref<SVGUseElement> SVGUseElement::create(const QualifiedName& tagName, Document& document)
{
- // Always build a #shadow-root for SVGUseElement.
- RefPtr<SVGUseElement> use = adoptRef(new SVGUseElement(tagName, document, wasInsertedByParser));
- use->ensureUserAgentShadowRoot();
- return use.release();
+ return adoptRef(*new SVGUseElement(tagName, document));
}
SVGUseElement::~SVGUseElement()
{
- setCachedDocument(0);
-
- clearResourceReferences();
-}
-
-SVGElementInstance* SVGUseElement::instanceRoot()
-{
- // If there is no element instance tree, force immediate SVGElementInstance tree
- // creation by asking the document to invoke our recalcStyle function - as we can't
- // wait for the lazy creation to happen if e.g. JS wants to access the instanceRoot
- // object right after creating the element on-the-fly
- if (!m_targetElementInstance)
- document().updateLayoutIgnorePendingStylesheets();
-
- return m_targetElementInstance.get();
-}
-
-SVGElementInstance* SVGUseElement::animatedInstanceRoot() const
-{
- // FIXME: Implement me.
- return 0;
-}
-
-bool SVGUseElement::isSupportedAttribute(const QualifiedName& attrName)
-{
- DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
- if (supportedAttributes.isEmpty()) {
- SVGLangSpace::addSupportedAttributes(supportedAttributes);
- SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
- SVGURIReference::addSupportedAttributes(supportedAttributes);
- supportedAttributes.add(SVGNames::xAttr);
- supportedAttributes.add(SVGNames::yAttr);
- supportedAttributes.add(SVGNames::widthAttr);
- supportedAttributes.add(SVGNames::heightAttr);
- }
- return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
+ if (m_externalDocument)
+ m_externalDocument->removeClient(*this);
}
void SVGUseElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
SVGParsingError parseError = NoError;
- if (!isSupportedAttribute(name))
- SVGGraphicsElement::parseAttribute(name, value);
- else if (name == SVGNames::xAttr)
- setXBaseValue(SVGLength::construct(LengthModeWidth, value, parseError));
+ if (name == SVGNames::xAttr)
+ setXBaseValue(SVGLengthValue::construct(LengthModeWidth, value, parseError));
else if (name == SVGNames::yAttr)
- setYBaseValue(SVGLength::construct(LengthModeHeight, value, parseError));
+ setYBaseValue(SVGLengthValue::construct(LengthModeHeight, value, parseError));
else if (name == SVGNames::widthAttr)
- setWidthBaseValue(SVGLength::construct(LengthModeWidth, value, parseError, ForbidNegativeLengths));
+ setWidthBaseValue(SVGLengthValue::construct(LengthModeWidth, value, parseError, ForbidNegativeLengths));
else if (name == SVGNames::heightAttr)
- setHeightBaseValue(SVGLength::construct(LengthModeHeight, value, parseError, ForbidNegativeLengths));
- else if (SVGLangSpace::parseAttribute(name, value)
- || SVGExternalResourcesRequired::parseAttribute(name, value)
- || SVGURIReference::parseAttribute(name, value)) {
- } else
- ASSERT_NOT_REACHED();
+ setHeightBaseValue(SVGLengthValue::construct(LengthModeHeight, value, parseError, ForbidNegativeLengths));
reportAttributeParsingError(parseError, name, value);
-}
-#if !ASSERT_DISABLED
-static inline bool isWellFormedDocument(Document& document)
-{
- if (document.isSVGDocument() || document.isXHTMLDocument())
- return static_cast<XMLDocumentParser*>(document.parser())->wellFormed();
- return true;
+ SVGExternalResourcesRequired::parseAttribute(name, value);
+ SVGGraphicsElement::parseAttribute(name, value);
+ SVGURIReference::parseAttribute(name, value);
}
-#endif
Node::InsertionNotificationRequest SVGUseElement::insertedInto(ContainerNode& rootParent)
{
- // This functions exists to assure assumptions made in the code regarding SVGElementInstance creation/destruction are satisfied.
SVGGraphicsElement::insertedInto(rootParent);
- if (!rootParent.inDocument())
- return InsertionDone;
- ASSERT(!m_targetElementInstance || !isWellFormedDocument(document()));
- ASSERT(!hasPendingResources() || !isWellFormedDocument(document()));
- if (!m_wasInsertedByParser)
- buildPendingResource();
- SVGExternalResourcesRequired::insertedIntoDocument(this);
+ if (isConnected()) {
+ SVGExternalResourcesRequired::insertedIntoDocument(this);
+ invalidateShadowTree();
+ updateExternalDocument();
+ }
return InsertionDone;
}
void SVGUseElement::removedFrom(ContainerNode& rootParent)
{
SVGGraphicsElement::removedFrom(rootParent);
- if (rootParent.inDocument())
- clearResourceReferences();
+ clearShadowTree();
+ updateExternalDocument();
}
-Document* SVGUseElement::referencedDocument() const
+inline Document* SVGUseElement::externalDocument() const
{
- if (!isExternalURIReference(href(), document()))
- return &document();
- return externalDocument();
+ return m_externalDocument ? m_externalDocument->document() : nullptr;
}
-Document* SVGUseElement::externalDocument() const
+void SVGUseElement::transferSizeAttributesToTargetClone(SVGElement& shadowElement) const
{
- if (m_cachedDocument && m_cachedDocument->isLoaded()) {
- // Gracefully handle error condition.
- if (m_cachedDocument->errorOccurred())
- return 0;
- ASSERT(m_cachedDocument->document());
- return m_cachedDocument->document();
+ // FIXME: The check for valueInSpecifiedUnits being non-zero below is a workaround for the fact
+ // that we currently have no good way to tell whether a particular animatable attribute is a value
+ // indicating it was unspecified, or specified but could not be parsed. Would be nice to fix that some day.
+ if (is<SVGSymbolElement>(shadowElement)) {
+ // Spec (<use> on <symbol>): This generated 'svg' will always have explicit values for attributes width and height.
+ // If attributes width and/or height are provided on the 'use' element, then these attributes
+ // will be transferred to the generated 'svg'. If attributes width and/or height are not specified,
+ // the generated 'svg' element will use values of 100% for these attributes.
+ shadowElement.setAttribute(SVGNames::widthAttr, (widthIsValid() && width().valueInSpecifiedUnits()) ? AtomicString(width().valueAsString()) : "100%");
+ shadowElement.setAttribute(SVGNames::heightAttr, (heightIsValid() && height().valueInSpecifiedUnits()) ? AtomicString(height().valueAsString()) : "100%");
+ } else if (is<SVGSVGElement>(shadowElement)) {
+ // Spec (<use> on <svg>): If attributes width and/or height are provided on the 'use' element, then these
+ // values will override the corresponding attributes on the 'svg' in the generated tree.
+ SVGElement* correspondingElement = shadowElement.correspondingElement();
+ shadowElement.setAttribute(SVGNames::widthAttr, (widthIsValid() && width().valueInSpecifiedUnits()) ? AtomicString(width().valueAsString()) : (correspondingElement ? correspondingElement->getAttribute(SVGNames::widthAttr) : nullAtom));
+ shadowElement.setAttribute(SVGNames::heightAttr, (heightIsValid() && height().valueInSpecifiedUnits()) ? AtomicString(height().valueAsString()) : (correspondingElement ? correspondingElement->getAttribute(SVGNames::heightAttr) : nullAtom));
}
- return 0;
}
void SVGUseElement::svgAttributeChanged(const QualifiedName& attrName)
{
- if (!isSupportedAttribute(attrName)) {
- SVGGraphicsElement::svgAttributeChanged(attrName);
- return;
- }
+ InstanceInvalidationGuard guard(*this);
- SVGElementInstance::InvalidationGuard invalidationGuard(this);
-
- auto renderer = this->renderer();
- if (attrName == SVGNames::xAttr
- || attrName == SVGNames::yAttr
- || attrName == SVGNames::widthAttr
- || attrName == SVGNames::heightAttr) {
+ if (attrName == SVGNames::xAttr || attrName == SVGNames::yAttr || attrName == SVGNames::widthAttr || attrName == SVGNames::heightAttr) {
updateRelativeLengthsInformation();
- if (renderer)
+ if (attrName == SVGNames::widthAttr || attrName == SVGNames::heightAttr) {
+ // FIXME: It's unnecessarily inefficient to update both width and height each time either is changed.
+ if (auto* targetClone = this->targetClone())
+ transferSizeAttributesToTargetClone(*targetClone);
+ }
+ if (auto* renderer = this->renderer())
RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer);
return;
}
@@ -240,758 +166,444 @@ void SVGUseElement::svgAttributeChanged(const QualifiedName& attrName)
return;
if (SVGURIReference::isKnownAttribute(attrName)) {
- bool isExternalReference = isExternalURIReference(href(), document());
- if (isExternalReference) {
- URL url = document().completeURL(href());
- if (url.hasFragmentIdentifier()) {
- CachedResourceRequest request(ResourceRequest(url.string()));
- request.setInitiator(this);
- setCachedDocument(document().cachedResourceLoader()->requestSVGDocument(request));
- }
- } else
- setCachedDocument(0);
-
- if (!m_wasInsertedByParser)
- buildPendingResource();
-
+ updateExternalDocument();
+ invalidateShadowTree();
return;
}
- if (SVGLangSpace::isKnownAttribute(attrName)
- || SVGExternalResourcesRequired::isKnownAttribute(attrName)) {
+ if (SVGLangSpace::isKnownAttribute(attrName) || SVGExternalResourcesRequired::isKnownAttribute(attrName)) {
invalidateShadowTree();
return;
}
- ASSERT_NOT_REACHED();
+ SVGGraphicsElement::svgAttributeChanged(attrName);
}
-void SVGUseElement::willAttachRenderers()
+void SVGUseElement::willRecalcStyle(Style::Change change)
{
- if (m_needsShadowTreeRecreation)
- buildPendingResource();
+ // FIXME: Shadow tree should be updated before style recalc.
+ if (m_shadowTreeNeedsUpdate)
+ updateShadowTree();
+ SVGGraphicsElement::willRecalcStyle(change);
}
-#ifdef DUMP_INSTANCE_TREE
-static void dumpInstanceTree(unsigned int& depth, String& text, SVGElementInstance* targetInstance)
-{
- SVGElement* element = targetInstance->correspondingElement();
- ASSERT(element);
-
- if (element->hasTagName(SVGNames::useTag)) {
- if (toSVGUseElement(element)->cachedDocumentIsStillLoading())
- return;
- }
-
- SVGElement* shadowTreeElement = targetInstance->shadowTreeElement();
- ASSERT(shadowTreeElement);
-
- SVGUseElement* directUseElement = targetInstance->directUseElement();
- String directUseElementName = directUseElement ? directUseElement->nodeName() : "null";
-
- String elementId = element->getIdAttribute();
- String elementNodeName = element->nodeName();
- String shadowTreeElementNodeName = shadowTreeElement->nodeName();
- String parentNodeName = element->parentNode() ? element->parentNode()->nodeName() : "null";
- String firstChildNodeName = element->firstChild() ? element->firstChild()->nodeName() : "null";
-
- for (unsigned int i = 0; i < depth; ++i)
- text += " ";
-
- text += String::format("SVGElementInstance this=%p, (parentNode=%s (%p), firstChild=%s (%p), correspondingElement=%s (%p), directUseElement=%s (%p), shadowTreeElement=%s (%p), id=%s)\n",
- targetInstance, parentNodeName.latin1().data(), element->parentNode(), firstChildNodeName.latin1().data(), element->firstChild(),
- elementNodeName.latin1().data(), element, directUseElementName.latin1().data(), directUseElement, shadowTreeElementNodeName.latin1().data(), shadowTreeElement, elementId.latin1().data());
-
- for (unsigned int i = 0; i < depth; ++i)
- text += " ";
-
- const HashSet<SVGElementInstance*>& elementInstances = element->instancesForElement();
- text += "Corresponding element is associated with " + String::number(elementInstances.size()) + " instance(s):\n";
-
- const HashSet<SVGElementInstance*>::const_iterator end = elementInstances.end();
- for (HashSet<SVGElementInstance*>::const_iterator it = elementInstances.begin(); it != end; ++it) {
- for (unsigned int i = 0; i < depth; ++i)
- text += " ";
-
- text += String::format(" -> SVGElementInstance this=%p, (refCount: %i, shadowTreeElement in document? %i)\n",
- *it, (*it)->refCount(), (*it)->shadowTreeElement()->inDocument());
- }
-
- ++depth;
-
- for (SVGElementInstance* instance = targetInstance->firstChild(); instance; instance = instance->nextSibling())
- dumpInstanceTree(depth, text, instance);
-
- --depth;
-}
-#endif
-
-static bool isDisallowedElement(const Element& element)
+static HashSet<AtomicString> createAllowedElementSet()
{
// Spec: "Any 'svg', 'symbol', 'g', graphics element or other 'use' is potentially a template object that can be re-used
// (i.e., "instanced") in the SVG document via a 'use' element."
// "Graphics Element" is defined as 'circle', 'ellipse', 'image', 'line', 'path', 'polygon', 'polyline', 'rect', 'text'
// Excluded are anything that is used by reference or that only make sense to appear once in a document.
-
- if (!element.isSVGElement())
- return true;
-
- DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, allowedElementTags, ());
- if (allowedElementTags.isEmpty()) {
- allowedElementTags.add(SVGNames::aTag);
- allowedElementTags.add(SVGNames::circleTag);
- allowedElementTags.add(SVGNames::descTag);
- allowedElementTags.add(SVGNames::ellipseTag);
- allowedElementTags.add(SVGNames::gTag);
- allowedElementTags.add(SVGNames::imageTag);
- allowedElementTags.add(SVGNames::lineTag);
- allowedElementTags.add(SVGNames::metadataTag);
- allowedElementTags.add(SVGNames::pathTag);
- allowedElementTags.add(SVGNames::polygonTag);
- allowedElementTags.add(SVGNames::polylineTag);
- allowedElementTags.add(SVGNames::rectTag);
- allowedElementTags.add(SVGNames::svgTag);
- allowedElementTags.add(SVGNames::switchTag);
- allowedElementTags.add(SVGNames::symbolTag);
- allowedElementTags.add(SVGNames::textTag);
- allowedElementTags.add(SVGNames::textPathTag);
- allowedElementTags.add(SVGNames::titleTag);
- allowedElementTags.add(SVGNames::trefTag);
- allowedElementTags.add(SVGNames::tspanTag);
- allowedElementTags.add(SVGNames::useTag);
- }
- return !allowedElementTags.contains<SVGAttributeHashTranslator>(element.tagQName());
+ using namespace SVGNames;
+ HashSet<AtomicString> set;
+ for (auto& tag : { aTag, circleTag, descTag, ellipseTag, gTag, imageTag, lineTag, metadataTag, pathTag, polygonTag, polylineTag, rectTag, svgTag, switchTag, symbolTag, textTag, textPathTag, titleTag, trefTag, tspanTag, useTag })
+ set.add(tag.localName());
+ return set;
}
-static bool subtreeContainsDisallowedElement(SVGElement& start)
+static inline bool isDisallowedElement(const SVGElement& element)
{
- for (auto& element : descendantsOfType<Element>(start)) {
- if (isDisallowedElement(element))
- return true;
- }
-
- return false;
+ static NeverDestroyed<HashSet<AtomicString>> set = createAllowedElementSet();
+ return !set.get().contains(element.localName());
}
-void SVGUseElement::clearResourceReferences()
+static inline bool isDisallowedElement(const Element& element)
{
- // FIXME: We should try to optimize this, to at least allow partial reclones.
- if (ShadowRoot* shadowTreeRootElement = shadowRoot())
- shadowTreeRootElement->removeChildren();
-
- if (m_targetElementInstance) {
- m_targetElementInstance->detach();
- m_targetElementInstance = 0;
- }
-
- m_needsShadowTreeRecreation = false;
+ return !element.isSVGElement() || isDisallowedElement(downcast<SVGElement>(element));
+}
- document().accessSVGExtensions()->removeAllTargetReferencesForElement(this);
+void SVGUseElement::clearShadowTree()
+{
+ if (auto* root = userAgentShadowRoot())
+ root->removeChildren();
}
void SVGUseElement::buildPendingResource()
{
- if (!referencedDocument() || isInShadowTree())
- return;
- clearResourceReferences();
- if (!inDocument())
- return;
-
- String id;
- Element* target = SVGURIReference::targetElementFromIRIString(href(), document(), &id, externalDocument());
- if (!target || !target->inDocument()) {
- // If we can't find the target of an external element, just give up.
- // We can't observe if the target somewhen enters the external document, nor should we do it.
- if (externalDocument())
- return;
- if (id.isEmpty())
- return;
-
- referencedDocument()->accessSVGExtensions()->addPendingResource(id, this);
- ASSERT(hasPendingResources());
- return;
- }
-
- if (target->isSVGElement()) {
- buildShadowAndInstanceTree(toSVGElement(target));
- invalidateDependentShadowTrees();
- }
-
- ASSERT(!m_needsShadowTreeRecreation);
+ invalidateShadowTree();
}
-void SVGUseElement::buildShadowAndInstanceTree(SVGElement* target)
+void SVGUseElement::updateShadowTree()
{
- ASSERT(!m_targetElementInstance);
-
- // Do not build the shadow/instance tree for <use> elements living in a shadow tree.
- // The will be expanded soon anyway - see expandUseElementsInShadowTree().
- if (isInShadowTree())
- return;
-
- // Do not allow self-referencing.
- // 'target' may be null, if it's a non SVG namespaced element.
- if (!target || target == this)
- return;
-
- // Why a seperated instance/shadow tree? SVG demands it:
- // The instance tree is accesable from JavaScript, and has to
- // expose a 1:1 copy of the referenced tree, whereas internally we need
- // to alter the tree for correct "use-on-symbol", "use-on-svg" support.
-
- // Build instance tree. Create root SVGElementInstance object for the first sub-tree node.
- //
- // Spec: If the 'use' element references a simple graphics element such as a 'rect', then there is only a
- // single SVGElementInstance object, and the correspondingElement attribute on this SVGElementInstance object
- // is the SVGRectElement that corresponds to the referenced 'rect' element.
- m_targetElementInstance = SVGElementInstance::create(this, this, target);
+ m_shadowTreeNeedsUpdate = false;
- // Eventually enter recursion to build SVGElementInstance objects for the sub-tree children
- bool foundProblem = false;
- buildInstanceTree(target, m_targetElementInstance.get(), foundProblem, false);
+ // FIXME: It's expensive to re-clone the entire tree every time. We should find a more efficient way to handle this.
+ clearShadowTree();
- if (instanceTreeIsLoading(m_targetElementInstance.get()))
+ if (isInShadowTree() || !isConnected())
return;
- // SVG specification does not say a word about <use> & cycles. My view on this is: just ignore it!
- // Non-appearing <use> content is easier to debug, then half-appearing content.
- if (foundProblem) {
- clearResourceReferences();
+ String targetID;
+ auto* target = findTarget(&targetID);
+ if (!target) {
+ document().accessSVGExtensions().addPendingResource(targetID, this);
return;
}
- // Assure instance tree building was successfull
- ASSERT(m_targetElementInstance);
- ASSERT(!m_targetElementInstance->shadowTreeElement());
- ASSERT(m_targetElementInstance->correspondingUseElement() == this);
- ASSERT(m_targetElementInstance->directUseElement() == this);
- ASSERT(m_targetElementInstance->correspondingElement() == target);
-
- ShadowRoot* shadowTreeRootElement = shadowRoot();
- ASSERT(shadowTreeRootElement);
-
- // Build shadow tree from instance tree
- // This also handles the special cases: <use> on <symbol>, <use> on <svg>.
- buildShadowTree(target, m_targetElementInstance.get());
-
- // Expand all <use> elements in the shadow tree.
- // Expand means: replace the actual <use> element by what it references.
- expandUseElementsInShadowTree(shadowTreeRootElement);
-
- // Expand all <symbol> elements in the shadow tree.
- // Expand means: replace the actual <symbol> element by the <svg> element.
- expandSymbolElementsInShadowTree(shadowTreeRootElement);
-
- // Now that the shadow tree is completly expanded, we can associate
- // shadow tree elements <-> instances in the instance tree.
- associateInstancesWithShadowTreeElements(shadowTreeRootElement->firstChild(), m_targetElementInstance.get());
-
- // If no shadow tree element is present, this means that the reference root
- // element was removed, as it is disallowed (ie. <use> on <foreignObject>)
- // Do NOT leave an inconsistent instance tree around, instead destruct it.
- if (!m_targetElementInstance->shadowTreeElement()) {
- clearResourceReferences();
- return;
- }
-
- ASSERT(m_targetElementInstance->shadowTreeElement()->parentNode() == shadowTreeRootElement);
+ cloneTarget(ensureUserAgentShadowRoot(), *target);
+ expandUseElementsInShadowTree();
+ expandSymbolElementsInShadowTree();
+ transferEventListenersToShadowTree();
- // Transfer event listeners assigned to the referenced element to our shadow tree elements.
- transferEventListenersToShadowTree(m_targetElementInstance.get());
-
- // Update relative length information.
updateRelativeLengthsInformation();
- // Eventually dump instance tree
-#ifdef DUMP_INSTANCE_TREE
- String text;
- unsigned int depth = 0;
-
- dumpInstanceTree(depth, text, m_targetElementInstance.get());
- fprintf(stderr, "\nDumping <use> instance tree:\n%s\n", text.latin1().data());
-#endif
+ // When we invalidate the other shadow trees, it's important that we don't
+ // follow any cycles and invalidate ourselves. To avoid that, we temporarily
+ // set m_shadowTreeNeedsUpdate to true so invalidateShadowTree will
+ // quickly return and do nothing.
+ ASSERT(!m_shadowTreeNeedsUpdate);
+ m_shadowTreeNeedsUpdate = true;
+ invalidateDependentShadowTrees();
+ m_shadowTreeNeedsUpdate = false;
+}
- // Eventually dump shadow tree
-#ifdef DUMP_SHADOW_TREE
- RefPtr<XMLSerializer> serializer = XMLSerializer::create();
- String markup = serializer->serializeToString(shadowTreeRootElement, ASSERT_NO_EXCEPTION);
- fprintf(stderr, "Dumping <use> shadow tree markup:\n%s\n", markup.latin1().data());
-#endif
+SVGElement* SVGUseElement::targetClone() const
+{
+ auto* root = userAgentShadowRoot();
+ if (!root)
+ return nullptr;
+ return childrenOfType<SVGElement>(*root).first();
}
-RenderPtr<RenderElement> SVGUseElement::createElementRenderer(PassRef<RenderStyle> style)
+RenderPtr<RenderElement> SVGUseElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
- return createRenderer<RenderSVGTransformableContainer>(*this, std::move(style));
+ return createRenderer<RenderSVGTransformableContainer>(*this, WTFMove(style));
}
-static bool isDirectReference(const Node* node)
+static bool isDirectReference(const SVGElement& element)
{
- return node->hasTagName(SVGNames::pathTag)
- || node->hasTagName(SVGNames::rectTag)
- || node->hasTagName(SVGNames::circleTag)
- || node->hasTagName(SVGNames::ellipseTag)
- || node->hasTagName(SVGNames::polygonTag)
- || node->hasTagName(SVGNames::polylineTag)
- || node->hasTagName(SVGNames::textTag);
+ using namespace SVGNames;
+ return element.hasTagName(circleTag)
+ || element.hasTagName(ellipseTag)
+ || element.hasTagName(pathTag)
+ || element.hasTagName(polygonTag)
+ || element.hasTagName(polylineTag)
+ || element.hasTagName(rectTag)
+ || element.hasTagName(textTag);
}
void SVGUseElement::toClipPath(Path& path)
{
ASSERT(path.isEmpty());
- Node* n = m_targetElementInstance ? m_targetElementInstance->shadowTreeElement() : 0;
- if (!n)
+ auto* targetClone = this->targetClone();
+ if (!is<SVGGraphicsElement>(targetClone))
return;
- if (n->isSVGElement() && toSVGElement(n)->isSVGGraphicsElement()) {
- if (!isDirectReference(n))
- // Spec: Indirect references are an error (14.3.5)
- document().accessSVGExtensions()->reportError("Not allowed to use indirect reference in <clip-path>");
- else {
- toSVGGraphicsElement(n)->toClipPath(path);
- // FIXME: Avoid manual resolution of x/y here. Its potentially harmful.
- SVGLengthContext lengthContext(this);
- path.translate(FloatSize(x().value(lengthContext), y().value(lengthContext)));
- path.transform(animatedLocalTransform());
- }
+ if (!isDirectReference(*targetClone)) {
+ // Spec: Indirect references are an error (14.3.5)
+ document().accessSVGExtensions().reportError(ASCIILiteral("Not allowed to use indirect reference in <clip-path>"));
+ return;
}
+
+ downcast<SVGGraphicsElement>(*targetClone).toClipPath(path);
+ SVGLengthContext lengthContext(this);
+ // FIXME: Find a way to do this without manual resolution of x/y here. It's potentially incorrect.
+ path.translate(FloatSize(x().value(lengthContext), y().value(lengthContext)));
+ path.transform(animatedLocalTransform());
}
RenderElement* SVGUseElement::rendererClipChild() const
{
- Node* n = m_targetElementInstance ? m_targetElementInstance->shadowTreeElement() : 0;
- if (!n)
- return 0;
-
- if (n->isSVGElement() && isDirectReference(n))
- return toSVGElement(n)->renderer();
-
- return 0;
+ auto* targetClone = this->targetClone();
+ if (!targetClone)
+ return nullptr;
+ if (!isDirectReference(*targetClone))
+ return nullptr;
+ return targetClone->renderer();
}
-void SVGUseElement::buildInstanceTree(SVGElement* target, SVGElementInstance* targetInstance, bool& foundProblem, bool foundUse)
+static inline void disassociateAndRemoveClones(const Vector<Element*>& clones)
{
- ASSERT(target);
- ASSERT(targetInstance);
-
- // Spec: If the referenced object is itself a 'use', or if there are 'use' subelements within the referenced
- // object, the instance tree will contain recursive expansion of the indirect references to form a complete tree.
- bool targetHasUseTag = target->hasTagName(SVGNames::useTag);
- SVGElement* newTarget = 0;
- if (targetHasUseTag) {
- foundProblem = hasCycleUseReferencing(toSVGUseElement(target), targetInstance, newTarget);
- if (foundProblem)
- return;
-
- // We only need to track first degree <use> dependencies. Indirect references are handled
- // as the invalidation bubbles up the dependency chain.
- if (!foundUse) {
- document().accessSVGExtensions()->addElementReferencingTarget(this, target);
- foundUse = true;
- }
- } else if (isDisallowedElement(*target)) {
- foundProblem = true;
- return;
- }
-
- // A general description from the SVG spec, describing what buildInstanceTree() actually does.
- //
- // Spec: If the 'use' element references a 'g' which contains two 'rect' elements, then the instance tree
- // contains three SVGElementInstance objects, a root SVGElementInstance object whose correspondingElement
- // is the SVGGElement object for the 'g', and then two child SVGElementInstance objects, each of which has
- // its correspondingElement that is an SVGRectElement object.
-
- for (auto& element : childrenOfType<SVGElement>(*target)) {
- // Skip any non-svg nodes or any disallowed element.
- if (isDisallowedElement(element))
- continue;
-
- // Create SVGElementInstance object, for both container/non-container nodes.
- RefPtr<SVGElementInstance> instance = SVGElementInstance::create(this, 0, &element);
- SVGElementInstance* instancePtr = instance.get();
- targetInstance->appendChild(instance.release());
-
- // Enter recursion, appending new instance tree nodes to the "instance" object.
- buildInstanceTree(&element, instancePtr, foundProblem, foundUse);
- if (foundProblem)
- return;
+ for (auto& clone : clones) {
+ for (auto& descendant : descendantsOfType<SVGElement>(*clone))
+ descendant.setCorrespondingElement(nullptr);
+ clone->parentNode()->removeChild(*clone);
}
-
- if (!targetHasUseTag || !newTarget)
- return;
-
- RefPtr<SVGElementInstance> newInstance = SVGElementInstance::create(this, toSVGUseElement(target), newTarget);
- SVGElementInstance* newInstancePtr = newInstance.get();
- targetInstance->appendChild(newInstance.release());
- buildInstanceTree(newTarget, newInstancePtr, foundProblem, foundUse);
}
-bool SVGUseElement::hasCycleUseReferencing(SVGUseElement* use, SVGElementInstance* targetInstance, SVGElement*& newTarget)
+static void removeDisallowedElementsFromSubtree(SVGElement& subtree)
{
- ASSERT(referencedDocument());
- Element* targetElement = SVGURIReference::targetElementFromIRIString(use->href(), *referencedDocument());
- newTarget = 0;
- if (targetElement && targetElement->isSVGElement())
- newTarget = toSVGElement(targetElement);
-
- if (!newTarget)
- return false;
-
- // Shortcut for self-references
- if (newTarget == this)
- return true;
+ // Remove disallowed elements after the fact rather than not cloning them in the first place.
+ // This optimizes for the normal case where none of those elements are present.
- AtomicString targetId = newTarget->getIdAttribute();
- SVGElementInstance* instance = targetInstance->parentNode();
- while (instance) {
- SVGElement* element = instance->correspondingElement();
+ // This function is used only on elements in subtrees that are not yet in documents, so
+ // mutation events are not a factor; there are no event listeners to handle those events.
+ // Assert that it's not in a document to make sure callers are still using it this way.
+ ASSERT(!subtree.isConnected());
- if (element->hasID() && element->getIdAttribute() == targetId && &element->document() == &newTarget->document())
- return true;
-
- instance = instance->parentNode();
- }
- return false;
-}
-
-static inline void removeDisallowedElementsFromSubtree(SVGElement& subtree)
-{
- ASSERT(!subtree.inDocument());
- Vector<Element*> toRemove;
- auto it = descendantsOfType<Element>(subtree).begin();
- auto end = descendantsOfType<Element>(subtree).end();
- while (it != end) {
+ Vector<Element*> disallowedElements;
+ auto descendants = descendantsOfType<Element>(subtree);
+ for (auto it = descendants.begin(), end = descendants.end(); it != end; ) {
if (isDisallowedElement(*it)) {
- toRemove.append(&*it);
+ disallowedElements.append(&*it);
it.traverseNextSkippingChildren();
continue;
}
++it;
}
- // The subtree is not in document so this won't generate events that could mutate the tree.
- for (unsigned i = 0; i < toRemove.size(); ++i)
- toRemove[i]->parentNode()->removeChild(toRemove[i]);
+
+ disassociateAndRemoveClones(disallowedElements);
}
-void SVGUseElement::buildShadowTree(SVGElement* target, SVGElementInstance* targetInstance)
+static void removeSymbolElementsFromSubtree(SVGElement& subtree)
{
- ASSERT(target); // FIXME: Don't be a pointer!
-
- // For instance <use> on <foreignObject> (direct case).
- if (isDisallowedElement(*target))
- return;
-
- RefPtr<SVGElement> newChild = static_pointer_cast<SVGElement>(targetInstance->correspondingElement()->cloneElementWithChildren());
-
- // We don't walk the target tree element-by-element, and clone each element,
- // but instead use cloneElementWithChildren(). This is an optimization for the common
- // case where <use> doesn't contain disallowed elements (ie. <foreignObject>).
- // Though if there are disallowed elements in the subtree, we have to remove them.
- // For instance: <use> on <g> containing <foreignObject> (indirect case).
- if (subtreeContainsDisallowedElement(*newChild))
- removeDisallowedElementsFromSubtree(*newChild);
-
- shadowRoot()->appendChild(newChild.release());
+ // Symbol elements inside the subtree should not be cloned for two reasons: 1) They are invisible and
+ // don't need to be cloned to get correct rendering. 2) expandSymbolElementsInShadowTree will turn them
+ // into <svg> elements, which is correct for symbol elements directly referenced by use elements,
+ // but incorrect for ones that just happen to be in a subtree.
+ Vector<Element*> symbolElements;
+ for (auto& descendant : descendantsOfType<SVGSymbolElement>(subtree))
+ symbolElements.append(&descendant);
+ disassociateAndRemoveClones(symbolElements);
}
-void SVGUseElement::expandUseElementsInShadowTree(Node* element)
+static void associateClonesWithOriginals(SVGElement& clone, SVGElement& original)
{
- // Why expand the <use> elements in the shadow tree here, and not just
- // do this directly in buildShadowTree, if we encounter a <use> element?
- //
- // Short answer: Because we may miss to expand some elements. Ie. if a <symbol>
- // contains <use> tags, we'd miss them. So once we're done with settin' up the
- // actual shadow tree (after the special case modification for svg/symbol) we have
- // to walk it completely and expand all <use> elements.
- if (element->hasTagName(SVGNames::useTag)) {
- SVGUseElement* use = toSVGUseElement(element);
- ASSERT(!use->cachedDocumentIsStillLoading());
-
- ASSERT(referencedDocument());
- Element* targetElement = SVGURIReference::targetElementFromIRIString(use->href(), *referencedDocument());
- SVGElement* target = 0;
- if (targetElement && targetElement->isSVGElement())
- target = toSVGElement(targetElement);
+ // This assertion checks that we don't call this with the arguments backwards.
+ // The clone is new and so it's not installed in a parent yet.
+ ASSERT(!clone.parentNode());
- // Don't ASSERT(target) here, it may be "pending", too.
- // Setup sub-shadow tree root node
- RefPtr<SVGGElement> cloneParent = SVGGElement::create(SVGNames::gTag, *referencedDocument());
- use->cloneChildNodes(cloneParent.get());
-
- // Spec: In the generated content, the 'use' will be replaced by 'g', where all attributes from the
- // 'use' element except for x, y, width, height and xlink:href are transferred to the generated 'g' element.
- transferUseAttributesToReplacedElement(use, cloneParent.get());
+ // The loop below works because we are associating these clones immediately, before
+ // doing transformations like removing disallowed elements or expanding elements.
+ clone.setCorrespondingElement(&original);
+ for (auto pair : descendantsOfType<SVGElement>(clone, original))
+ pair.first.setCorrespondingElement(&pair.second);
+}
- if (target && !isDisallowedElement(*target)) {
- RefPtr<Element> newChild = target->cloneElementWithChildren();
- ASSERT(newChild->isSVGElement());
- cloneParent->appendChild(newChild.release());
- }
+static void associateReplacementCloneWithOriginal(SVGElement& replacementClone, SVGElement& originalClone)
+{
+ auto* correspondingElement = originalClone.correspondingElement();
+ ASSERT(correspondingElement);
+ originalClone.setCorrespondingElement(nullptr);
+ replacementClone.setCorrespondingElement(correspondingElement);
+}
- // We don't walk the target tree element-by-element, and clone each element,
- // but instead use cloneElementWithChildren(). This is an optimization for the common
- // case where <use> doesn't contain disallowed elements (ie. <foreignObject>).
- // Though if there are disallowed elements in the subtree, we have to remove them.
- // For instance: <use> on <g> containing <foreignObject> (indirect case).
- if (subtreeContainsDisallowedElement(*cloneParent))
- removeDisallowedElementsFromSubtree(*cloneParent);
-
- RefPtr<Node> replacingElement(cloneParent.get());
-
- // Replace <use> with referenced content.
- ASSERT(use->parentNode());
- use->parentNode()->replaceChild(cloneParent.release(), use);
-
- // Expand the siblings because the *element* is replaced and we will
- // lose the sibling chain when we are back from recursion.
- element = replacingElement.get();
- for (RefPtr<Node> sibling = element->nextSibling(); sibling; sibling = sibling->nextSibling())
- expandUseElementsInShadowTree(sibling.get());
- }
+static void associateReplacementClonesWithOriginals(SVGElement& replacementClone, SVGElement& originalClone)
+{
+ // This assertion checks that we don't call this with the arguments backwards.
+ // The replacement clone is new and so it's not installed in a parent yet.
+ ASSERT(!replacementClone.parentNode());
- for (RefPtr<Node> child = element->firstChild(); child; child = child->nextSibling())
- expandUseElementsInShadowTree(child.get());
+ // The loop below works because we are associating these clones immediately, before
+ // doing transformations like removing disallowed elements or expanding elements.
+ associateReplacementCloneWithOriginal(replacementClone, originalClone);
+ for (auto pair : descendantsOfType<SVGElement>(replacementClone, originalClone))
+ associateReplacementCloneWithOriginal(pair.first, pair.second);
}
-void SVGUseElement::expandSymbolElementsInShadowTree(Node* element)
+SVGElement* SVGUseElement::findTarget(String* targetID) const
{
- if (element->hasTagName(SVGNames::symbolTag)) {
- // Spec: The referenced 'symbol' and its contents are deep-cloned into the generated tree,
- // with the exception that the 'symbol' is replaced by an 'svg'. This generated 'svg' will
- // always have explicit values for attributes width and height. If attributes width and/or
- // height are provided on the 'use' element, then these attributes will be transferred to
- // the generated 'svg'. If attributes width and/or height are not specified, the generated
- // 'svg' element will use values of 100% for these attributes.
- RefPtr<SVGSVGElement> svgElement = SVGSVGElement::create(SVGNames::svgTag, *referencedDocument());
-
- // Transfer all data (attributes, etc.) from <symbol> to the new <svg> element.
- svgElement->cloneDataFromElement(*toElement(element));
+ auto* correspondingElement = this->correspondingElement();
+ auto& original = correspondingElement ? downcast<SVGUseElement>(*correspondingElement) : *this;
- // Only clone symbol children, and add them to the new <svg> element
- for (Node* child = element->firstChild(); child; child = child->nextSibling()) {
- RefPtr<Node> newChild = child->cloneNode(true);
- svgElement->appendChild(newChild.release());
+ auto* targetCandidate = targetElementFromIRIString(original.href(), original.document(), targetID, original.externalDocument());
+ if (targetID && !targetID->isNull()) {
+ // If the reference is external, don't return the target ID to the caller.
+ // The caller would use the target ID to wait for a pending resource on the wrong document.
+ // If we ever want the change that and let the caller to wait on the external document,
+ // we should change this function so it returns the appropriate document to go with the ID.
+ if (isExternalURIReference(original.href(), original.document()))
+ *targetID = String();
+ }
+ if (!is<SVGElement>(targetCandidate))
+ return nullptr;
+ auto& target = downcast<SVGElement>(*targetCandidate);
+
+ if (!target.isConnected() || isDisallowedElement(target))
+ return nullptr;
+
+ // Reject any target that has already been cloned to create one of the ancestors of this element,
+ // already in the shadow tree. This is sufficient to prevent cycles.
+ if (correspondingElement) {
+ for (auto& ancestor : lineageOfType<SVGElement>(*this)) {
+ if (ancestor.correspondingElement() == &target)
+ return nullptr;
}
-
- // We don't walk the target tree element-by-element, and clone each element,
- // but instead use cloneNode(deep=true). This is an optimization for the common
- // case where <use> doesn't contain disallowed elements (ie. <foreignObject>).
- // Though if there are disallowed elements in the subtree, we have to remove them.
- // For instance: <use> on <g> containing <foreignObject> (indirect case).
- if (subtreeContainsDisallowedElement(*svgElement))
- removeDisallowedElementsFromSubtree(*svgElement);
-
- RefPtr<Node> replacingElement(svgElement.get());
-
- // Replace <symbol> with <svg>.
- element->parentNode()->replaceChild(svgElement.release(), element);
-
- // Expand the siblings because the *element* is replaced and we will
- // lose the sibling chain when we are back from recursion.
- element = replacingElement.get();
- for (RefPtr<Node> sibling = element->nextSibling(); sibling; sibling = sibling->nextSibling())
- expandSymbolElementsInShadowTree(sibling.get());
}
- for (RefPtr<Node> child = element->firstChild(); child; child = child->nextSibling())
- expandSymbolElementsInShadowTree(child.get());
+ return &target;
}
-void SVGUseElement::transferEventListenersToShadowTree(SVGElementInstance* target)
+void SVGUseElement::cloneTarget(ContainerNode& container, SVGElement& target) const
{
- if (!target)
- return;
-
- SVGElement* originalElement = target->correspondingElement();
- ASSERT(originalElement);
+ Ref<SVGElement> targetClone = static_cast<SVGElement&>(target.cloneElementWithChildren(document()).get());
+ associateClonesWithOriginals(targetClone.get(), target);
+ removeDisallowedElementsFromSubtree(targetClone.get());
+ removeSymbolElementsFromSubtree(targetClone.get());
+ transferSizeAttributesToTargetClone(targetClone.get());
+ container.appendChild(targetClone);
+}
- if (SVGElement* shadowTreeElement = target->shadowTreeElement()) {
- if (EventTargetData* data = originalElement->eventTargetData())
- data->eventListenerMap.copyEventListenersNotCreatedFromMarkupToTarget(shadowTreeElement);
- }
+static void cloneDataAndChildren(SVGElement& replacementClone, SVGElement& originalClone)
+{
+ // This assertion checks that we don't call this with the arguments backwards.
+ // The replacement clone is new and so it's not installed in a parent yet.
+ ASSERT(!replacementClone.parentNode());
- for (SVGElementInstance* instance = target->firstChild(); instance; instance = instance->nextSibling())
- transferEventListenersToShadowTree(instance);
+ replacementClone.cloneDataFromElement(originalClone);
+ originalClone.cloneChildNodes(replacementClone);
+ associateReplacementClonesWithOriginals(replacementClone, originalClone);
+ removeDisallowedElementsFromSubtree(replacementClone);
}
-void SVGUseElement::associateInstancesWithShadowTreeElements(Node* target, SVGElementInstance* targetInstance)
+void SVGUseElement::expandUseElementsInShadowTree() const
{
- if (!target || !targetInstance)
- return;
+ auto descendants = descendantsOfType<SVGUseElement>(*userAgentShadowRoot());
+ for (auto it = descendants.begin(), end = descendants.end(); it != end; ) {
+ SVGUseElement& originalClone = *it;
+ it = end; // Efficiently quiets assertions due to the outstanding iterator.
- SVGElement* originalElement = targetInstance->correspondingElement();
+ auto* target = originalClone.findTarget();
- if (originalElement->hasTagName(SVGNames::useTag)) {
- // <use> gets replaced by <g>
- ASSERT(target->nodeName() == SVGNames::gTag);
- } else if (originalElement->hasTagName(SVGNames::symbolTag)) {
- // <symbol> gets replaced by <svg>
- ASSERT(target->nodeName() == SVGNames::svgTag);
- } else
- ASSERT(target->nodeName() == originalElement->nodeName());
+ // Spec: In the generated content, the 'use' will be replaced by 'g', where all attributes from the
+ // 'use' element except for x, y, width, height and xlink:href are transferred to the generated 'g' element.
- SVGElement* element = 0;
- if (target->isSVGElement())
- element = toSVGElement(target);
+ auto replacementClone = SVGGElement::create(document());
+ cloneDataAndChildren(replacementClone.get(), originalClone);
- ASSERT(!targetInstance->shadowTreeElement());
- targetInstance->setShadowTreeElement(element);
- element->setCorrespondingElement(originalElement);
+ replacementClone->removeAttribute(SVGNames::xAttr);
+ replacementClone->removeAttribute(SVGNames::yAttr);
+ replacementClone->removeAttribute(SVGNames::widthAttr);
+ replacementClone->removeAttribute(SVGNames::heightAttr);
+ replacementClone->removeAttribute(XLinkNames::hrefAttr);
- Node* node = target->firstChild();
- for (SVGElementInstance* instance = targetInstance->firstChild(); node && instance; instance = instance->nextSibling()) {
- // Skip any non-svg elements in shadow tree
- while (node && !node->isSVGElement())
- node = node->nextSibling();
+ if (target)
+ originalClone.cloneTarget(replacementClone.get(), *target);
- if (!node)
- break;
+ originalClone.parentNode()->replaceChild(replacementClone, originalClone);
- associateInstancesWithShadowTreeElements(node, instance);
- node = node->nextSibling();
+ // Resume iterating, starting just inside the replacement clone.
+ it = descendants.from(replacementClone.get());
}
}
-SVGElementInstance* SVGUseElement::instanceForShadowTreeElement(Node* element) const
+void SVGUseElement::expandSymbolElementsInShadowTree() const
{
- if (!m_targetElementInstance) {
- ASSERT(!inDocument());
- return 0;
- }
-
- return instanceForShadowTreeElement(element, m_targetElementInstance.get());
-}
+ auto descendants = descendantsOfType<SVGSymbolElement>(*userAgentShadowRoot());
+ for (auto it = descendants.begin(), end = descendants.end(); it != end; ) {
+ SVGSymbolElement& originalClone = *it;
+ it = end; // Efficiently quiets assertions due to the outstanding iterator.
-SVGElementInstance* SVGUseElement::instanceForShadowTreeElement(Node* element, SVGElementInstance* instance) const
-{
- ASSERT(element);
- ASSERT(instance);
+ // Spec: The referenced 'symbol' and its contents are deep-cloned into the generated tree,
+ // with the exception that the 'symbol' is replaced by an 'svg'. This generated 'svg' will
+ // always have explicit values for attributes width and height. If attributes width and/or
+ // height are provided on the 'use' element, then these attributes will be transferred to
+ // the generated 'svg'. If attributes width and/or height are not specified, the generated
+ // 'svg' element will use values of 100% for these attributes.
- // We're dispatching a mutation event during shadow tree construction
- // this instance hasn't yet been associated to a shadowTree element.
- if (!instance->shadowTreeElement())
- return 0;
+ auto replacementClone = SVGSVGElement::create(document());
+ cloneDataAndChildren(replacementClone.get(), originalClone);
- if (element == instance->shadowTreeElement())
- return instance;
+ originalClone.parentNode()->replaceChild(replacementClone, originalClone);
- for (SVGElementInstance* current = instance->firstChild(); current; current = current->nextSibling()) {
- if (SVGElementInstance* search = instanceForShadowTreeElement(element, current))
- return search;
+ // Resume iterating, starting just inside the replacement clone.
+ it = descendants.from(replacementClone.get());
}
+}
- return 0;
+void SVGUseElement::transferEventListenersToShadowTree() const
+{
+ for (auto& descendant : descendantsOfType<SVGElement>(*userAgentShadowRoot())) {
+ if (EventTargetData* data = descendant.correspondingElement()->eventTargetData())
+ data->eventListenerMap.copyEventListenersNotCreatedFromMarkupToTarget(&descendant);
+ }
}
void SVGUseElement::invalidateShadowTree()
{
- if (m_needsShadowTreeRecreation)
+ if (m_shadowTreeNeedsUpdate)
return;
- m_needsShadowTreeRecreation = true;
- setNeedsStyleRecalc(ReconstructRenderTree);
+ m_shadowTreeNeedsUpdate = true;
+ invalidateStyleAndRenderersForSubtree();
invalidateDependentShadowTrees();
}
void SVGUseElement::invalidateDependentShadowTrees()
{
- // Recursively invalidate dependent <use> shadow trees
- const HashSet<SVGElementInstance*>& instances = instancesForElement();
- const HashSet<SVGElementInstance*>::const_iterator end = instances.end();
- for (HashSet<SVGElementInstance*>::const_iterator it = instances.begin(); it != end; ++it) {
- if (SVGUseElement* element = (*it)->correspondingUseElement()) {
- ASSERT(element->inDocument());
+ for (auto* instance : instances()) {
+ if (auto* element = instance->correspondingUseElement())
element->invalidateShadowTree();
- }
}
}
-void SVGUseElement::transferUseAttributesToReplacedElement(SVGElement* from, SVGElement* to) const
-{
- ASSERT(from);
- ASSERT(to);
-
- to->cloneDataFromElement(*from);
-
- to->removeAttribute(SVGNames::xAttr);
- to->removeAttribute(SVGNames::yAttr);
- to->removeAttribute(SVGNames::widthAttr);
- to->removeAttribute(SVGNames::heightAttr);
- to->removeAttribute(XLinkNames::hrefAttr);
-}
-
bool SVGUseElement::selfHasRelativeLengths() const
{
- if (x().isRelative()
- || y().isRelative()
- || width().isRelative()
- || height().isRelative())
+ if (x().isRelative() || y().isRelative() || width().isRelative() || height().isRelative())
return true;
- if (!m_targetElementInstance)
- return false;
-
- SVGElement* element = m_targetElementInstance->correspondingElement();
- if (!element)
- return false;
-
- return element->hasRelativeLengths();
+ auto* targetClone = this->targetClone();
+ return targetClone && targetClone->hasRelativeLengths();
}
-void SVGUseElement::notifyFinished(CachedResource* resource)
+void SVGUseElement::notifyFinished(CachedResource& resource)
{
- if (!inDocument())
- return;
-
invalidateShadowTree();
- if (resource->errorOccurred())
+ if (resource.errorOccurred())
dispatchEvent(Event::create(eventNames().errorEvent, false, false));
- else if (!resource->wasCanceled())
+ else if (!resource.wasCanceled())
SVGExternalResourcesRequired::dispatchLoadEvent(this);
}
-bool SVGUseElement::cachedDocumentIsStillLoading()
+void SVGUseElement::finishParsingChildren()
{
- if (m_cachedDocument && m_cachedDocument->isLoading())
- return true;
- return false;
+ SVGGraphicsElement::finishParsingChildren();
+ SVGExternalResourcesRequired::finishParsingChildren();
}
-bool SVGUseElement::instanceTreeIsLoading(SVGElementInstance* targetElementInstance)
+void SVGUseElement::updateExternalDocument()
{
- for (SVGElementInstance* instance = targetElementInstance->firstChild(); instance; instance = instance->nextSibling()) {
- if (SVGUseElement* use = instance->correspondingUseElement()) {
- if (use->cachedDocumentIsStillLoading())
- return true;
- }
- if (instance->hasChildNodes())
- instanceTreeIsLoading(instance);
+ URL externalDocumentURL;
+ if (isConnected() && isExternalURIReference(href(), document())) {
+ externalDocumentURL = document().completeURL(href());
+ if (!externalDocumentURL.hasFragmentIdentifier())
+ externalDocumentURL = URL();
}
- return false;
+
+ if (externalDocumentURL == (m_externalDocument ? m_externalDocument->url() : URL()))
+ return;
+
+ if (m_externalDocument)
+ m_externalDocument->removeClient(*this);
+
+ if (externalDocumentURL.isNull())
+ m_externalDocument = nullptr;
+ else {
+ ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();
+ options.contentSecurityPolicyImposition = isInUserAgentShadowTree() ? ContentSecurityPolicyImposition::SkipPolicyCheck : ContentSecurityPolicyImposition::DoPolicyCheck;
+ options.mode = FetchOptions::Mode::SameOrigin;
+ CachedResourceRequest request { ResourceRequest { externalDocumentURL }, options };
+ request.setInitiator(*this);
+ m_externalDocument = document().cachedResourceLoader().requestSVGDocument(WTFMove(request));
+ if (m_externalDocument)
+ m_externalDocument->addClient(*this);
+ }
+
+ invalidateShadowTree();
}
-void SVGUseElement::finishParsingChildren()
+bool SVGUseElement::isValid() const
{
- SVGGraphicsElement::finishParsingChildren();
- SVGExternalResourcesRequired::finishParsingChildren();
- if (m_wasInsertedByParser) {
- buildPendingResource();
- m_wasInsertedByParser = false;
- }
+ return SVGTests::isValid();
}
-void SVGUseElement::setCachedDocument(CachedResourceHandle<CachedSVGDocument> cachedDocument)
+bool SVGUseElement::haveLoadedRequiredResources()
{
- if (m_cachedDocument == cachedDocument)
- return;
+ return SVGExternalResourcesRequired::haveLoadedRequiredResources();
+}
- if (m_cachedDocument)
- m_cachedDocument->removeClient(this);
+void SVGUseElement::setHaveFiredLoadEvent(bool haveFiredLoadEvent)
+{
+ m_haveFiredLoadEvent = haveFiredLoadEvent;
+}
- m_cachedDocument = cachedDocument;
- if (m_cachedDocument)
- m_cachedDocument->addClient(this);
+bool SVGUseElement::haveFiredLoadEvent() const
+{
+ return m_haveFiredLoadEvent;
}
+Timer* SVGUseElement::svgLoadEventTimer()
+{
+ return &m_svgLoadEventTimer;
}
-#endif // ENABLE(SVG)
+}
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