215 lines
7.7 KiB
C++
215 lines
7.7 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 1999 Antti Koivisto (koivisto@kde.org)
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* (C) 2000 Simon Hausmann (hausmann@kde.org)
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* (C) 2001 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2004-2019 Apple Inc. All rights reserved.
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* Copyright (C) 2009 Ericsson AB. All rights reserved.
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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 "HTMLIFrameElement.h"
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#include "CSSPropertyNames.h"
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#include "DOMTokenList.h"
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#include "Frame.h"
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#include "HTMLNames.h"
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#include "HTMLParserIdioms.h"
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#include "LazyLoadFrameObserver.h"
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#include "RenderIFrame.h"
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#include "ScriptController.h"
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#include "ScriptableDocumentParser.h"
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#include "Settings.h"
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#include <wtf/IsoMallocInlines.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLIFrameElement);
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using namespace HTMLNames;
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inline HTMLIFrameElement::HTMLIFrameElement(const QualifiedName& tagName, Document& document)
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: HTMLFrameElementBase(tagName, document)
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{
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ASSERT(hasTagName(iframeTag));
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}
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Ref<HTMLIFrameElement> HTMLIFrameElement::create(const QualifiedName& tagName, Document& document)
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{
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return adoptRef(*new HTMLIFrameElement(tagName, document));
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}
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int HTMLIFrameElement::defaultTabIndex() const
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{
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return 0;
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}
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DOMTokenList& HTMLIFrameElement::sandbox()
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{
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if (!m_sandbox) {
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m_sandbox = makeUnique<DOMTokenList>(*this, sandboxAttr, [](Document&, StringView token) {
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return SecurityContext::isSupportedSandboxPolicy(token);
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});
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}
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return *m_sandbox;
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}
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bool HTMLIFrameElement::hasPresentationalHintsForAttribute(const QualifiedName& name) const
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{
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if (name == widthAttr || name == heightAttr || name == frameborderAttr)
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return true;
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return HTMLFrameElementBase::hasPresentationalHintsForAttribute(name);
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}
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void HTMLIFrameElement::collectPresentationalHintsForAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
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{
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if (name == widthAttr)
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addHTMLLengthToStyle(style, CSSPropertyWidth, value);
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else if (name == heightAttr)
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addHTMLLengthToStyle(style, CSSPropertyHeight, value);
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else if (name == alignAttr)
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applyAlignmentAttributeToStyle(value, style);
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else if (name == frameborderAttr) {
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// Frame border doesn't really match the HTML4 spec definition for iframes. It simply adds
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// a presentational hint that the border should be off if set to zero.
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if (!parseHTMLInteger(value).value_or(0)) {
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// Add a rule that nulls out our border width.
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addPropertyToPresentationalHintStyle(style, CSSPropertyBorderWidth, 0, CSSUnitType::CSS_PX);
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}
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} else
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HTMLFrameElementBase::collectPresentationalHintsForAttribute(name, value, style);
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}
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void HTMLIFrameElement::parseAttribute(const QualifiedName& name, const AtomString& value)
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{
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if (name == sandboxAttr) {
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if (m_sandbox)
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m_sandbox->associatedAttributeValueChanged(value);
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String invalidTokens;
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setSandboxFlags(value.isNull() ? SandboxNone : SecurityContext::parseSandboxPolicy(value, invalidTokens));
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if (!invalidTokens.isNull())
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document().addConsoleMessage(MessageSource::Other, MessageLevel::Error, "Error while parsing the 'sandbox' attribute: " + invalidTokens);
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} else if (name == allowAttr || name == allowfullscreenAttr || name == webkitallowfullscreenAttr) {
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m_featurePolicy = std::nullopt;
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} else if (name == loadingAttr) {
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// Allow loading=eager to load the frame immediately if the lazy load was started, but
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// do not allow the reverse situation since the eager load is already started.
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if (m_lazyLoadFrameObserver && !equalLettersIgnoringASCIICase(value, "lazy")) {
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m_lazyLoadFrameObserver->unobserve();
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loadDeferredFrame();
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}
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} else
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HTMLFrameElementBase::parseAttribute(name, value);
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}
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bool HTMLIFrameElement::rendererIsNeeded(const RenderStyle& style)
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{
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return style.display() != DisplayType::None && canLoad();
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}
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RenderPtr<RenderElement> HTMLIFrameElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
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{
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return createRenderer<RenderIFrame>(*this, WTFMove(style));
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}
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void HTMLIFrameElement::setReferrerPolicyForBindings(const AtomString& value)
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{
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setAttributeWithoutSynchronization(referrerpolicyAttr, value);
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}
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String HTMLIFrameElement::referrerPolicyForBindings() const
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{
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return referrerPolicyToString(referrerPolicy());
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}
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ReferrerPolicy HTMLIFrameElement::referrerPolicy() const
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{
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if (m_lazyLoadFrameObserver)
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return m_lazyLoadFrameObserver->referrerPolicy();
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if (document().settings().referrerPolicyAttributeEnabled())
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return parseReferrerPolicy(attributeWithoutSynchronization(referrerpolicyAttr), ReferrerPolicySource::ReferrerPolicyAttribute).value_or(ReferrerPolicy::EmptyString);
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return ReferrerPolicy::EmptyString;
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}
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const FeaturePolicy& HTMLIFrameElement::featurePolicy() const
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{
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if (!m_featurePolicy)
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m_featurePolicy = FeaturePolicy::parse(document(), *this, attributeWithoutSynchronization(allowAttr));
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return *m_featurePolicy;
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}
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const AtomString& HTMLIFrameElement::loadingForBindings() const
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{
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static MainThreadNeverDestroyed<const AtomString> eager("eager", AtomString::ConstructFromLiteral);
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static MainThreadNeverDestroyed<const AtomString> lazy("lazy", AtomString::ConstructFromLiteral);
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return equalLettersIgnoringASCIICase(attributeWithoutSynchronization(HTMLNames::loadingAttr), "lazy") ? lazy : eager;
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}
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void HTMLIFrameElement::setLoadingForBindings(const AtomString& value)
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{
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setAttributeWithoutSynchronization(loadingAttr, value);
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}
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static bool isFrameLazyLoadable(const Document& document, const URL& completeURL, const AtomString& loadingAttributeValue)
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{
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if (!completeURL.protocolIsInHTTPFamily())
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return false;
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if (!document.frame() || !document.frame()->script().canExecuteScripts(NotAboutToExecuteScript))
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return false;
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return equalLettersIgnoringASCIICase(loadingAttributeValue, "lazy");
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}
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bool HTMLIFrameElement::shouldLoadFrameLazily()
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{
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if (!m_lazyLoadFrameObserver && document().settings().lazyIframeLoadingEnabled()) {
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URL completeURL = document().completeURL(frameURL());
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if (isFrameLazyLoadable(document(), completeURL, attributeWithoutSynchronization(HTMLNames::loadingAttr))) {
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auto currentReferrerPolicy = referrerPolicy();
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lazyLoadFrameObserver().observe(completeURL.string(), currentReferrerPolicy);
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return true;
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}
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}
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return false;
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}
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bool HTMLIFrameElement::isLazyLoadObserverActive() const
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{
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return !!m_lazyLoadFrameObserver;
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}
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void HTMLIFrameElement::loadDeferredFrame()
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{
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AtomString currentURL = frameURL();
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setFrameURL(m_lazyLoadFrameObserver->frameURL());
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openURL();
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setFrameURL(currentURL);
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m_lazyLoadFrameObserver = nullptr;
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}
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LazyLoadFrameObserver& HTMLIFrameElement::lazyLoadFrameObserver()
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{
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if (!m_lazyLoadFrameObserver)
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m_lazyLoadFrameObserver = makeUnique<LazyLoadFrameObserver>(*this);
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return *m_lazyLoadFrameObserver;
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}
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}
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