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chromium/external/github.com/WebKit/webkit/8a2c8a97dfd3af0fdb68d49fc58e1163aca8085a/./Source/WebCore/svg/SVGUseElement.cpp
blob: c33bda751fa8ff568d420ceb705babebf38f8a6f [file]
/*
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
* Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
* 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) 2015-2025 Apple Inc. All rights reserved.
* Copyright (C) 2019 Google 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
* 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 "SVGUseElement.h"
#include "CachedResourceLoader.h"
#include "CachedSVGDocument.h"
#include "ContainerNodeInlines.h"
#include "ElementAncestorIteratorInlines.h"
#include "ElementChildIteratorInlines.h"
#include "Event.h"
#include "EventNames.h"
#include "EventTargetInlines.h"
#include "LegacyRenderSVGResource.h"
#include "LegacyRenderSVGTransformableContainer.h"
#include "NodeName.h"
#include "RenderSVGTransformableContainer.h"
#include "SVGDocumentExtensions.h"
#include "SVGElementTypeHelpers.h"
#include "SVGGElement.h"
#include "SVGParsingError.h"
#include "SVGSVGElement.h"
#include "SVGSymbolElement.h"
#include "ScriptDisallowedScope.h"
#include "ShadowRoot.h"
#include "TypedElementDescendantIteratorInlines.h"
#include "XLinkNames.h"
#include <wtf/RobinHoodHashSet.h>
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(SVGUseElement);
inline SVGUseElement::SVGUseElement(const QualifiedName& tagName, Document& document)
: SVGGraphicsElement(tagName, document, makeUniqueRef<PropertyRegistry>(*this))
, SVGURIReference(this)
, m_loadEventTimer(*this, &SVGElement::loadEventTimerFired)
{
ASSERT(hasCustomStyleResolveCallbacks());
ASSERT(hasTagName(SVGNames::useTag));
static std::once_flag onceFlag;
std::call_once(onceFlag, [] {
PropertyRegistry::registerProperty<SVGNames::xAttr, &SVGUseElement::m_x>();
PropertyRegistry::registerProperty<SVGNames::yAttr, &SVGUseElement::m_y>();
PropertyRegistry::registerProperty<SVGNames::widthAttr, &SVGUseElement::m_width>();
PropertyRegistry::registerProperty<SVGNames::heightAttr, &SVGUseElement::m_height>();
});
}
Ref<SVGUseElement> SVGUseElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new SVGUseElement(tagName, document));
}
SVGUseElement::~SVGUseElement()
{
if (CachedResourceHandle externalDocument = m_externalDocument)
externalDocument->removeClient(*this);
}
void SVGUseElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason attributeModificationReason)
{
auto parseError = SVGParsingError::None;
switch (name.nodeName()) {
case AttributeNames::xAttr:
Ref { m_x }->setBaseValInternal(SVGLengthValue::construct(SVGLengthMode::Width, newValue, parseError));
break;
case AttributeNames::yAttr:
Ref { m_y }->setBaseValInternal(SVGLengthValue::construct(SVGLengthMode::Height, newValue, parseError));
break;
case AttributeNames::widthAttr:
Ref { m_width }->setBaseValInternal(SVGLengthValue::construct(SVGLengthMode::Width, newValue, parseError, SVGLengthNegativeValuesMode::Forbid));
break;
case AttributeNames::heightAttr:
Ref { m_height }->setBaseValInternal(SVGLengthValue::construct(SVGLengthMode::Height, newValue, parseError, SVGLengthNegativeValuesMode::Forbid));
break;
default:
break;
}
reportAttributeParsingError(parseError, name, newValue);
SVGURIReference::parseAttribute(name, newValue);
SVGGraphicsElement::attributeChanged(name, oldValue, newValue, attributeModificationReason);
}
Node::InsertedIntoAncestorResult SVGUseElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
{
auto result = SVGGraphicsElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
if (insertionType.connectedToDocument) {
if (m_shadowTreeNeedsUpdate)
protectedDocument()->addElementWithPendingUserAgentShadowTreeUpdate(*this);
invalidateShadowTree();
// FIXME: Move back the call to updateExternalDocument() here once notifyFinished is made always async.
return InsertedIntoAncestorResult::NeedsPostInsertionCallback;
}
return result;
}
void SVGUseElement::didFinishInsertingNode()
{
SVGGraphicsElement::didFinishInsertingNode();
updateExternalDocument();
}
void SVGUseElement::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
{
// Check m_shadowTreeNeedsUpdate before calling SVGElement::removedFromAncestor which calls SVGElement::invalidateInstances
// and SVGUseElement::updateExternalDocument which calls invalidateShadowTree().
if (removalType.disconnectedFromDocument) {
if (m_shadowTreeNeedsUpdate) {
Ref<Document> document = this->document();
document->removeElementWithPendingUserAgentShadowTreeUpdate(*this);
}
}
SVGGraphicsElement::removedFromAncestor(removalType, oldParentOfRemovedTree);
if (removalType.disconnectedFromDocument) {
clearShadowTree();
updateExternalDocument();
}
}
inline Document* SVGUseElement::externalDocument() const
{
return m_externalDocument ? m_externalDocument->document() : nullptr;
}
void SVGUseElement::transferSizeAttributesToTargetClone(SVGElement& shadowElement) const
{
// Use |shadowElement| for checking the element type, because we will
// have replaced a <symbol> with an <svg> in the instance tree.
if (!is<SVGSymbolElement>(shadowElement) && !is<SVGSVGElement>(shadowElement))
return;
// "The width and height properties on the 'use' element override the values
// for the corresponding properties on a referenced 'svg' or 'symbol' element
// when determining the used value for that property on the instance root
// element. However, if the computed value for the property on the 'use'
// element is auto, then the property is computed as normal for the element
// instance. ... Because auto is the initial value, if dimensions are not
// explicitly set on the 'use' element, the values set on the 'svg' or
// 'symbol' will be used as defaults."
// https://svgwg.org/svg2-draft/struct.html#UseElement
RefPtr correspondingElement = shadowElement.correspondingElement();
shadowElement.setAttribute(SVGNames::widthAttr, width().valueInSpecifiedUnits() ? width().valueAsAtomString() : (correspondingElement ? correspondingElement->getAttribute(SVGNames::widthAttr) : nullAtom()));
shadowElement.setAttribute(SVGNames::heightAttr, height().valueInSpecifiedUnits() ? height().valueAsAtomString() : (correspondingElement ? correspondingElement->getAttribute(SVGNames::heightAttr) : nullAtom()));
}
void SVGUseElement::svgAttributeChanged(const QualifiedName& attrName)
{
InstanceInvalidationGuard guard(*this);
if (PropertyRegistry::isKnownAttribute(attrName)) {
updateRelativeLengthsInformation();
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);
}
updateSVGRendererForElementChange();
invalidateResourceImageBuffersIfNeeded();
return;
}
if (SVGURIReference::isKnownAttribute(attrName)) {
updateExternalDocument();
invalidateShadowTree();
invalidateResourceImageBuffersIfNeeded();
return;
}
SVGGraphicsElement::svgAttributeChanged(attrName);
}
static inline bool isDisallowedElement(const SVGElement& element)
{
using namespace ElementNames;
// 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.
switch (element.elementName()) {
case SVG::a:
case SVG::circle:
case SVG::desc:
case SVG::ellipse:
case SVG::g:
case SVG::image:
case SVG::line:
case SVG::metadata:
case SVG::path:
case SVG::polygon:
case SVG::polyline:
case SVG::rect:
case SVG::svg:
case SVG::switch_:
case SVG::symbol:
case SVG::text:
case SVG::textPath:
case SVG::title:
case SVG::tref:
case SVG::tspan:
case SVG::use:
return false;
default:
break;
}
return true;
}
static inline bool isDisallowedElement(const Element& element)
{
RefPtr svgElement = dynamicDowncast<SVGElement>(element);
return !svgElement || isDisallowedElement(*svgElement);
}
void SVGUseElement::clearShadowTree()
{
if (RefPtr root = userAgentShadowRoot()) {
// Safe because SVG use element's shadow tree is never used to fire synchronous events during layout or DOM mutations.
ScriptDisallowedScope::EventAllowedScope scope(*root);
root->removeChildren();
}
}
void SVGUseElement::buildPendingResource()
{
invalidateShadowTree();
}
void SVGUseElement::updateUserAgentShadowTree()
{
m_shadowTreeNeedsUpdate = 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 (!isConnected())
return;
protectedDocument()->removeElementWithPendingUserAgentShadowTreeUpdate(*this);
AtomString targetID;
RefPtr target = findTarget(&targetID);
if (!target) {
treeScopeForSVGReferences().addPendingSVGResource(targetID, *this);
return;
}
RELEASE_ASSERT(!isDescendantOf(target.get()));
{
Ref shadowRoot = ensureUserAgentShadowRoot();
ScriptDisallowedScope::EventAllowedScope eventAllowedScope { shadowRoot };
cloneTarget(shadowRoot, *target);
expandUseElementsInShadowTree();
expandSymbolElementsInShadowTree();
updateRelativeLengthsInformation();
}
transferEventListenersToShadowTree();
// 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;
}
RefPtr<SVGElement> SVGUseElement::targetClone() const
{
RefPtr root = userAgentShadowRoot();
return root ? downcast<SVGElement>(root->firstChild()) : nullptr;
}
RenderPtr<RenderElement> SVGUseElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
if (document().settings().layerBasedSVGEngineEnabled())
return createRenderer<RenderSVGTransformableContainer>(*this, WTFMove(style));
return createRenderer<LegacyRenderSVGTransformableContainer>(*this, WTFMove(style));
}
static bool isDirectReference(const SVGElement& element)
{
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);
}
Path SVGUseElement::toClipPath()
{
RELEASE_ASSERT(!document().settings().layerBasedSVGEngineEnabled());
RefPtr targetClone = dynamicDowncast<SVGGraphicsElement>(this->targetClone());
if (!targetClone)
return { };
if (!isDirectReference(*targetClone)) {
// Spec: Indirect references are an error (14.3.5)
protectedDocument()->checkedSVGExtensions()->reportError("Not allowed to use indirect reference in <clip-path>"_s);
return { };
}
Path path = targetClone->toClipPath();
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());
return path;
}
RefPtr<SVGElement> SVGUseElement::clipChild() const
{
RefPtr targetClone = this->targetClone();
if (!targetClone || !isDirectReference(*targetClone))
return nullptr;
return targetClone;
}
RenderElement* SVGUseElement::rendererClipChild() const
{
RefPtr targetClone = this->targetClone();
if (!targetClone)
return nullptr;
if (!isDirectReference(*targetClone))
return nullptr;
return targetClone->renderer();
}
static inline void disassociateAndRemoveClones(const Vector<Ref<Element>>& clones)
{
for (Ref clone : clones) {
for (Ref descendant : descendantsOfType<SVGElement>(clone.get()))
descendant->setCorrespondingElement(nullptr);
if (RefPtr svgClone = dynamicDowncast<SVGElement>(clone.get()))
svgClone->setCorrespondingElement(nullptr);
clone->remove();
}
}
static void removeDisallowedElementsFromSubtree(SVGElement& subtree)
{
// 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.
// 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());
Vector<Ref<Element>> disallowedElements;
for (auto it = descendantsOfType<Element>(subtree).begin(); it; ) {
if (isDisallowedElement(*it)) {
disallowedElements.append(*it);
it.traverseNextSkippingChildren();
continue;
}
++it;
}
disassociateAndRemoveClones(disallowedElements);
}
static void removeSymbolElementsFromSubtree(SVGElement& subtree)
{
// 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<Ref<Element>> symbolElements;
for (auto it = descendantsOfType<Element>(subtree).begin(); it; ) {
if (is<SVGSymbolElement>(*it)) {
symbolElements.append(*it);
it.traverseNextSkippingChildren();
continue;
}
++it;
}
disassociateAndRemoveClones(symbolElements);
}
static void associateClonesWithOriginals(SVGElement& clone, SVGElement& original)
{
// 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());
// 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(Ref { pair.second }.ptr());
}
static void associateReplacementCloneWithOriginal(SVGElement& replacementClone, SVGElement& originalClone)
{
RefPtr correspondingElement = originalClone.correspondingElement();
ASSERT(correspondingElement);
originalClone.setCorrespondingElement(nullptr);
replacementClone.setCorrespondingElement(correspondingElement.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());
// 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(Ref { pair.first }, Ref { pair.second });
}
RefPtr<SVGElement> SVGUseElement::findTarget(AtomString* targetID) const
{
RefPtr correspondingElement = this->correspondingElement();
Ref original = correspondingElement ? downcast<SVGUseElement>(*correspondingElement) : *this;
auto targetResult = targetElementFromIRIString(original->href(), original->treeScope(), original->externalDocument());
if (targetID) {
*targetID = WTFMove(targetResult.identifier);
// 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 (!targetID->isNull() && isExternalURIReference(original->href(), original->protectedDocument()))
*targetID = nullAtom();
}
RefPtr target = dynamicDowncast<SVGElement>(targetResult.element.get());
if (!target)
return nullptr;
if (!target->isConnected() || isDisallowedElement(*target))
return nullptr;
if (correspondingElement) {
for (auto& ancestor : lineageOfType<SVGElement>(*this)) {
if (ancestor.correspondingElement() == target)
return nullptr;
}
} else {
if (target->contains(this))
return nullptr;
// Target should only refer to a node in the same tree or a node in another document.
ASSERT(!isShadowIncludingDescendantOf(target.get()));
}
return target;
}
void SVGUseElement::cloneTarget(ContainerNode& container, SVGElement& target) const
{
Ref targetClone = downcast<SVGElement>(target.cloneElementWithChildren(protectedDocument(), nullptr));
ScriptDisallowedScope::EventAllowedScope eventAllowedScope { targetClone };
associateClonesWithOriginals(targetClone.get(), target);
removeDisallowedElementsFromSubtree(targetClone.get());
removeSymbolElementsFromSubtree(targetClone.get());
transferSizeAttributesToTargetClone(targetClone.get());
container.appendChild(targetClone);
}
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());
replacementClone.cloneDataFromElement(originalClone);
originalClone.cloneChildNodes(replacementClone.document(), nullptr, replacementClone);
associateReplacementClonesWithOriginals(replacementClone, originalClone);
removeDisallowedElementsFromSubtree(replacementClone);
}
void SVGUseElement::expandUseElementsInShadowTree() const
{
auto descendants = descendantsOfType<SVGUseElement>(*protectedUserAgentShadowRoot());
for (auto it = descendants.begin(); it; ) {
Ref originalClone = *it;
it.dropAssertions();
RefPtr target = originalClone->findTarget();
// 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.
Ref replacementClone = SVGGElement::create(protectedDocument());
ScriptDisallowedScope::EventAllowedScope eventAllowedScope { replacementClone };
cloneDataAndChildren(replacementClone.get(), originalClone);
replacementClone->removeAttribute(SVGNames::xAttr);
replacementClone->removeAttribute(SVGNames::yAttr);
replacementClone->removeAttribute(SVGNames::widthAttr);
replacementClone->removeAttribute(SVGNames::heightAttr);
replacementClone->removeAttribute(SVGNames::hrefAttr);
replacementClone->removeAttribute(XLinkNames::hrefAttr);
if (target)
originalClone->cloneTarget(replacementClone.get(), *target);
originalClone->protectedParentNode()->replaceChild(replacementClone, originalClone);
// Resume iterating, starting just inside the replacement clone.
it = descendants.from(replacementClone.get());
}
}
void SVGUseElement::expandSymbolElementsInShadowTree() const
{
auto descendants = descendantsOfType<SVGSymbolElement>(*protectedUserAgentShadowRoot());
for (auto it = descendants.begin(); it; ) {
Ref originalClone = *it;
it.dropAssertions();
// 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.
Ref replacementClone = SVGSVGElement::create(protectedDocument());
ScriptDisallowedScope::EventAllowedScope eventAllowedScope { replacementClone };
cloneDataAndChildren(replacementClone.get(), originalClone);
originalClone->protectedParentNode()->replaceChild(replacementClone, originalClone);
// Resume iterating, starting just inside the replacement clone.
it = descendants.from(replacementClone.get());
}
}
void SVGUseElement::transferEventListenersToShadowTree() const
{
// FIXME: Don't directly add event listeners on each descendant. Copy event listeners on the use element instead.
for (Ref descendant : descendantsOfType<SVGElement>(*protectedUserAgentShadowRoot())) {
if (EventTargetData* data = descendant->correspondingElement()->eventTargetData())
data->eventListenerMap.copyEventListenersNotCreatedFromMarkupToTarget(descendant.ptr());
}
}
void SVGUseElement::invalidateShadowTree()
{
if (m_shadowTreeNeedsUpdate)
return;
m_shadowTreeNeedsUpdate = true;
invalidateStyleAndRenderersForSubtree();
invalidateDependentShadowTrees();
if (isConnected()) {
Ref<Document> document = this->document();
document->addElementWithPendingUserAgentShadowTreeUpdate(*this);
}
}
void SVGUseElement::invalidateDependentShadowTrees()
{
for (auto& instance : copyToVectorOf<Ref<SVGElement>>(instances())) {
if (RefPtr element = instance->correspondingUseElement())
element->invalidateShadowTree();
}
}
bool SVGUseElement::selfHasRelativeLengths() const
{
if (x().isRelative() || y().isRelative() || width().isRelative() || height().isRelative())
return true;
RefPtr targetClone = this->targetClone();
return targetClone && targetClone->hasRelativeLengths();
}
void SVGUseElement::notifyFinished(CachedResource& resource, const NetworkLoadMetrics&, LoadWillContinueInAnotherProcess)
{
ASSERT(ScriptDisallowedScope::InMainThread::isScriptAllowed());
invalidateShadowTree();
if (resource.errorOccurred()) {
setErrorOccurred(true);
dispatchEvent(Event::create(eventNames().errorEvent, Event::CanBubble::No, Event::IsCancelable::No));
} else if (!resource.wasCanceled())
SVGURIReference::dispatchLoadEvent();
}
void SVGUseElement::updateExternalDocument()
{
URL externalDocumentURL;
Ref<Document> document = this->document();
// FIXME: This early exit should be removed once the ASSERT(!url.protocolIsData()) is removed from isExternalURIReference().
if (document->completeURL(href()).protocolIsData())
return;
if (isConnected() && isExternalURIReference(href(), document)) {
externalDocumentURL = document->completeURL(href());
if (!externalDocumentURL.hasFragmentIdentifier())
externalDocumentURL = URL();
}
if (externalDocumentURL == (m_externalDocument ? m_externalDocument->url() : URL()))
return;
if (CachedResourceHandle externalDocument = m_externalDocument)
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;
options.destination = FetchOptions::Destination::Image;
options.sniffContent = ContentSniffingPolicy::DoNotSniffContent;
CachedResourceRequest request { ResourceRequest { WTFMove(externalDocumentURL) }, options };
request.setInitiator(*this);
m_externalDocument = document->protectedCachedResourceLoader()->requestSVGDocument(WTFMove(request)).value_or(nullptr);
if (CachedResourceHandle externalDocument = m_externalDocument)
externalDocument->addClient(*this);
}
invalidateShadowTree();
}
}