316 lines
9.6 KiB
C++
316 lines
9.6 KiB
C++
/*
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* Copyright (C) 2006 Apple Inc. All rights reserved.
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* Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
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* Copyright (C) 2007 Rob Buis <buis@kde.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "SVGDocumentExtensions.h"
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#include "DOMWindow.h"
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#include "Document.h"
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#include "EventListener.h"
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#include "Frame.h"
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#include "FrameLoader.h"
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#include "Page.h"
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#include "SMILTimeContainer.h"
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#include "SVGElement.h"
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#include "SVGFontFaceElement.h"
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#include "SVGResourcesCache.h"
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#include "SVGSMILElement.h"
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#include "SVGSVGElement.h"
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#include "SVGUseElement.h"
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#include "ScriptableDocumentParser.h"
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#include "ShadowRoot.h"
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#include <wtf/text/AtomString.h>
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namespace WebCore {
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SVGDocumentExtensions::SVGDocumentExtensions(Document& document)
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: m_document(document)
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, m_resourcesCache(makeUnique<SVGResourcesCache>())
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, m_areAnimationsPaused(!document.page() || !document.page()->isVisible())
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{
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}
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SVGDocumentExtensions::~SVGDocumentExtensions()
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{
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RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(m_useElementsWithPendingShadowTreeUpdate.computesEmpty());
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}
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void SVGDocumentExtensions::addTimeContainer(SVGSVGElement& element)
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{
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m_timeContainers.add(element);
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if (m_areAnimationsPaused)
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element.pauseAnimations();
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}
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void SVGDocumentExtensions::removeTimeContainer(SVGSVGElement& element)
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{
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m_timeContainers.remove(element);
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}
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void SVGDocumentExtensions::addResource(const AtomString& id, RenderSVGResourceContainer& resource)
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{
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if (id.isEmpty())
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return;
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// Replaces resource if already present, to handle potential id changes
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m_resources.set(id, &resource);
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}
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void SVGDocumentExtensions::removeResource(const AtomString& id)
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{
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if (id.isEmpty())
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return;
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m_resources.remove(id);
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}
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RenderSVGResourceContainer* SVGDocumentExtensions::resourceById(const AtomString& id) const
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{
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if (id.isEmpty())
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return 0;
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return m_resources.get(id);
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}
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void SVGDocumentExtensions::addUseElementWithPendingShadowTreeUpdate(SVGUseElement& element)
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{
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auto result = m_useElementsWithPendingShadowTreeUpdate.add(element);
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RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(result.isNewEntry);
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}
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void SVGDocumentExtensions::removeUseElementWithPendingShadowTreeUpdate(SVGUseElement& element)
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{
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m_useElementsWithPendingShadowTreeUpdate.remove(element);
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// FIXME: Assert that element was in m_svgUseElements once re-entrancy to update style and layout have been removed.
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}
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void SVGDocumentExtensions::startAnimations()
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{
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// FIXME: Eventually every "Time Container" will need a way to latch on to some global timer
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// starting animations for a document will do this "latching"
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// FIXME: We hold a ref pointers to prevent a shadow tree from getting removed out from underneath us.
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// In the future we should refactor the use-element to avoid this. See https://webkit.org/b/53704
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auto timeContainers = copyToVectorOf<Ref<SVGSVGElement>>(m_timeContainers);
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for (auto& element : timeContainers)
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element->timeContainer().begin();
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}
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void SVGDocumentExtensions::pauseAnimations()
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{
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for (auto& container : m_timeContainers)
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container.pauseAnimations();
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m_areAnimationsPaused = true;
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}
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void SVGDocumentExtensions::unpauseAnimations()
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{
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for (auto& container : m_timeContainers)
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container.unpauseAnimations();
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m_areAnimationsPaused = false;
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}
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void SVGDocumentExtensions::dispatchLoadEventToOutermostSVGElements()
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{
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auto timeContainers = copyToVectorOf<Ref<SVGSVGElement>>(m_timeContainers);
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for (auto& container : timeContainers) {
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if (!container->isOutermostSVGSVGElement())
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continue;
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container->sendLoadEventIfPossible();
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}
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}
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static void reportMessage(Document& document, MessageLevel level, const String& message)
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{
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if (document.frame())
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document.addConsoleMessage(MessageSource::Rendering, level, message);
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}
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void SVGDocumentExtensions::reportWarning(const String& message)
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{
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reportMessage(m_document, MessageLevel::Warning, "Warning: " + message);
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}
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void SVGDocumentExtensions::reportError(const String& message)
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{
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reportMessage(m_document, MessageLevel::Error, "Error: " + message);
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}
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void SVGDocumentExtensions::addPendingResource(const AtomString& id, Element& element)
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{
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if (id.isEmpty())
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return;
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auto result = m_pendingResources.add(id, WeakHashSet<Element> { });
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result.iterator->value.add(element);
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element.setHasPendingResources();
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}
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bool SVGDocumentExtensions::isIdOfPendingResource(const AtomString& id) const
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{
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if (id.isEmpty())
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return false;
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return m_pendingResources.contains(id);
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}
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bool SVGDocumentExtensions::isElementWithPendingResources(Element& element) const
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{
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// This algorithm takes time proportional to the number of pending resources and need not.
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// If performance becomes an issue we can keep a counted set of elements and answer the question efficiently.
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return WTF::anyOf(m_pendingResources.values(), [&] (auto& elements) {
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return elements.contains(element);
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});
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}
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bool SVGDocumentExtensions::isPendingResource(Element& element, const AtomString& id) const
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{
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if (id.isEmpty())
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return false;
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auto it = m_pendingResources.find(id);
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if (it == m_pendingResources.end())
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return false;
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return it->value.contains(element);
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}
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void SVGDocumentExtensions::clearHasPendingResourcesIfPossible(Element& element)
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{
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if (!isElementWithPendingResources(element))
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element.clearHasPendingResources();
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}
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void SVGDocumentExtensions::removeElementFromPendingResources(Element& element)
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{
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// Remove the element from pending resources.
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if (!m_pendingResources.isEmpty() && element.hasPendingResources()) {
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Vector<AtomString> toBeRemoved;
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for (auto& resource : m_pendingResources) {
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auto& elements = resource.value;
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elements.remove(element);
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if (elements.computesEmpty())
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toBeRemoved.append(resource.key);
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}
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clearHasPendingResourcesIfPossible(element);
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// We use the removePendingResource function here because it deals with set lifetime correctly.
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for (auto& resource : toBeRemoved)
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removePendingResource(resource);
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}
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// Remove the element from pending resources that were scheduled for removal.
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if (!m_pendingResourcesForRemoval.isEmpty()) {
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Vector<AtomString> toBeRemoved;
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for (auto& resource : m_pendingResourcesForRemoval) {
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auto& elements = resource.value;
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elements.remove(element);
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if (elements.computesEmpty())
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toBeRemoved.append(resource.key);
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}
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// We use the removePendingResourceForRemoval function here because it deals with set lifetime correctly.
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for (auto& resource : toBeRemoved)
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m_pendingResourcesForRemoval.remove(resource);
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}
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}
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void SVGDocumentExtensions::markPendingResourcesForRemoval(const AtomString& id)
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{
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if (id.isEmpty())
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return;
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ASSERT(!m_pendingResourcesForRemoval.contains(id));
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auto existing = m_pendingResources.take(id);
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if (!existing.computesEmpty())
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m_pendingResourcesForRemoval.add(id, WTFMove(existing));
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}
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RefPtr<Element> SVGDocumentExtensions::takeElementFromPendingResourcesForRemovalMap(const AtomString& id)
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{
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if (id.isEmpty())
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return nullptr;
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auto it = m_pendingResourcesForRemoval.find(id);
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if (it == m_pendingResourcesForRemoval.end())
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return nullptr;
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auto& resourceSet = it->value;
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auto firstElement = makeRefPtr(resourceSet.begin().get());
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if (!firstElement)
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return nullptr;
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resourceSet.remove(*firstElement);
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if (resourceSet.computesEmpty())
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m_pendingResourcesForRemoval.remove(id);
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return firstElement;
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}
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void SVGDocumentExtensions::addElementToRebuild(SVGElement& element)
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{
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m_rebuildElements.append(element);
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}
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void SVGDocumentExtensions::removeElementToRebuild(SVGElement& element)
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{
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m_rebuildElements.removeFirst(element);
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}
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void SVGDocumentExtensions::rebuildElements()
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{
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auto shadowRebuildElements = std::exchange(m_rebuildElements, { });
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for (auto& element : shadowRebuildElements)
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element->svgAttributeChanged(SVGNames::hrefAttr);
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}
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void SVGDocumentExtensions::clearTargetDependencies(SVGElement& referencedElement)
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{
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for (auto& element : referencedElement.referencingElements()) {
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m_rebuildElements.append(element.get());
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element->callClearTarget();
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}
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}
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void SVGDocumentExtensions::rebuildAllElementReferencesForTarget(SVGElement& referencedElement)
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{
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for (auto& element : referencedElement.referencingElements())
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element->svgAttributeChanged(SVGNames::hrefAttr);
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}
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void SVGDocumentExtensions::registerSVGFontFaceElement(SVGFontFaceElement& element)
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{
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m_svgFontFaceElements.add(element);
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}
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void SVGDocumentExtensions::unregisterSVGFontFaceElement(SVGFontFaceElement& element)
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{
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ASSERT(m_svgFontFaceElements.contains(element));
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m_svgFontFaceElements.remove(element);
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}
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}
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