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HTMLAnchorElement.cpp
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732 lines (608 loc) · 27.1 KB
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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Simon Hausmann <hausmann@kde.org>
* Copyright (C) 2003-2016 Apple Inc. All rights reserved.
* (C) 2006 Graham Dennis (graham.dennis@gmail.com)
*
* 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 "HTMLAnchorElement.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "DOMTokenList.h"
#include "ElementIterator.h"
#include "EventHandler.h"
#include "EventNames.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "FrameLoaderTypes.h"
#include "FrameSelection.h"
#include "HTMLCanvasElement.h"
#include "HTMLImageElement.h"
#include "HTMLParserIdioms.h"
#include "HTMLPictureElement.h"
#include "KeyboardEvent.h"
#include "LoaderStrategy.h"
#include "MouseEvent.h"
#include "PingLoader.h"
#include "PlatformMouseEvent.h"
#include "PlatformStrategies.h"
#include "PrivateClickMeasurement.h"
#include "RegistrableDomain.h"
#include "RenderImage.h"
#include "ResourceRequest.h"
#include "RuntimeApplicationChecks.h"
#include "SVGImage.h"
#include "ScriptController.h"
#include "SecurityOrigin.h"
#include "SecurityPolicy.h"
#include "Settings.h"
#include "UserGestureIndicator.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/WeakHashMap.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/text/StringConcatenateNumbers.h>
#if PLATFORM(COCOA)
#include "DataDetection.h"
#endif
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLAnchorElement);
using namespace HTMLNames;
HTMLAnchorElement::HTMLAnchorElement(const QualifiedName& tagName, Document& document)
: HTMLElement(tagName, document)
{
}
Ref<HTMLAnchorElement> HTMLAnchorElement::create(Document& document)
{
return adoptRef(*new HTMLAnchorElement(aTag, document));
}
Ref<HTMLAnchorElement> HTMLAnchorElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new HTMLAnchorElement(tagName, document));
}
HTMLAnchorElement::~HTMLAnchorElement()
{
clearRootEditableElementForSelectionOnMouseDown();
}
bool HTMLAnchorElement::supportsFocus() const
{
if (hasEditableStyle())
return HTMLElement::supportsFocus();
// If not a link we should still be able to focus the element if it has tabIndex.
return isLink() || HTMLElement::supportsFocus();
}
bool HTMLAnchorElement::isMouseFocusable() const
{
#if !(PLATFORM(GTK) || PLATFORM(WPE))
// Only allow links with tabIndex or contentEditable to be mouse focusable.
if (isLink())
return HTMLElement::supportsFocus();
#endif
return HTMLElement::isMouseFocusable();
}
bool HTMLAnchorElement::isInteractiveContent() const
{
return isLink();
}
static bool hasNonEmptyBox(RenderBoxModelObject* renderer)
{
if (!renderer)
return false;
// Before calling absoluteRects, check for the common case where borderBoundingBox
// is non-empty, since this is a faster check and almost always returns true.
// FIXME: Why do we need to call absoluteRects at all?
if (!renderer->borderBoundingBox().isEmpty())
return true;
// FIXME: Since all we are checking is whether the rects are empty, could we just
// pass in 0,0 for the layout point instead of calling localToAbsolute?
Vector<IntRect> rects;
renderer->absoluteRects(rects, flooredLayoutPoint(renderer->localToAbsolute()));
for (auto& rect : rects) {
if (!rect.isEmpty())
return true;
}
return false;
}
bool HTMLAnchorElement::isKeyboardFocusable(KeyboardEvent* event) const
{
if (!isLink())
return HTMLElement::isKeyboardFocusable(event);
if (!isFocusable())
return false;
if (!document().frame())
return false;
if (!document().frame()->eventHandler().tabsToLinks(event))
return false;
if (!renderer() && ancestorsOfType<HTMLCanvasElement>(*this).first())
return true;
return hasNonEmptyBox(renderBoxModelObject());
}
static void appendServerMapMousePosition(StringBuilder& url, Event& event)
{
if (!is<MouseEvent>(event))
return;
auto& mouseEvent = downcast<MouseEvent>(event);
if (!is<HTMLImageElement>(mouseEvent.target()))
return;
auto& imageElement = downcast<HTMLImageElement>(*mouseEvent.target());
if (!imageElement.isServerMap())
return;
auto* renderer = imageElement.renderer();
if (!is<RenderImage>(renderer))
return;
// FIXME: This should probably pass UseTransforms in the OptionSet<MapCoordinatesMode>.
auto absolutePosition = downcast<RenderImage>(*renderer).absoluteToLocal(FloatPoint(mouseEvent.pageX(), mouseEvent.pageY()));
url.append('?', std::lround(absolutePosition.x()), ',', std::lround(absolutePosition.y()));
}
void HTMLAnchorElement::defaultEventHandler(Event& event)
{
if (isLink()) {
if (focused() && isEnterKeyKeydownEvent(event) && treatLinkAsLiveForEventType(NonMouseEvent)) {
event.setDefaultHandled();
dispatchSimulatedClick(&event);
return;
}
if (MouseEvent::canTriggerActivationBehavior(event) && treatLinkAsLiveForEventType(eventType(event))) {
handleClick(event);
return;
}
if (hasEditableStyle()) {
// This keeps track of the editable block that the selection was in (if it was in one) just before the link was clicked
// for the LiveWhenNotFocused editable link behavior
auto& eventNames = WebCore::eventNames();
if (event.type() == eventNames.mousedownEvent && is<MouseEvent>(event) && downcast<MouseEvent>(event).button() != RightButton && document().frame()) {
setRootEditableElementForSelectionOnMouseDown(document().frame()->selection().selection().rootEditableElement());
m_wasShiftKeyDownOnMouseDown = downcast<MouseEvent>(event).shiftKey();
} else if (event.type() == eventNames.mouseoverEvent) {
// These are cleared on mouseover and not mouseout because their values are needed for drag events,
// but drag events happen after mouse out events.
clearRootEditableElementForSelectionOnMouseDown();
m_wasShiftKeyDownOnMouseDown = false;
}
}
}
HTMLElement::defaultEventHandler(event);
}
void HTMLAnchorElement::setActive(bool down, bool pause, Style::InvalidationScope invalidationScope)
{
if (down && hasEditableStyle()) {
switch (document().settings().editableLinkBehavior()) {
case EditableLinkBehavior::Default:
case EditableLinkBehavior::AlwaysLive:
break;
// Don't set the link to be active if the current selection is in the same editable block as this link.
case EditableLinkBehavior::LiveWhenNotFocused:
if (down && document().frame() && document().frame()->selection().selection().rootEditableElement() == rootEditableElement())
return;
break;
case EditableLinkBehavior::NeverLive:
case EditableLinkBehavior::OnlyLiveWithShiftKey:
return;
}
}
HTMLElement::setActive(down, pause, invalidationScope);
}
void HTMLAnchorElement::parseAttribute(const QualifiedName& name, const AtomString& value)
{
if (name == hrefAttr) {
bool wasLink = isLink();
setIsLink(!value.isNull() && !shouldProhibitLinks(this));
if (wasLink != isLink())
invalidateStyleForSubtree();
if (isLink()) {
String parsedURL = stripLeadingAndTrailingHTMLSpaces(value);
if (document().isDNSPrefetchEnabled() && document().frame()) {
if (protocolIsInHTTPFamily(parsedURL) || parsedURL.startsWith("//"_s))
document().frame()->loader().client().prefetchDNS(document().completeURL(parsedURL).host().toString());
}
}
} else if (name == nameAttr || name == titleAttr) {
// Do nothing.
} else if (name == relAttr) {
// Update HTMLAnchorElement::relList() if more rel attributes values are supported.
static MainThreadNeverDestroyed<const AtomString> noReferrer("noreferrer"_s);
static MainThreadNeverDestroyed<const AtomString> noOpener("noopener"_s);
static MainThreadNeverDestroyed<const AtomString> opener("opener"_s);
SpaceSplitString relValue(value, SpaceSplitString::ShouldFoldCase::Yes);
if (relValue.contains(noReferrer))
m_linkRelations.add(Relation::NoReferrer);
if (relValue.contains(noOpener))
m_linkRelations.add(Relation::NoOpener);
if (relValue.contains(opener))
m_linkRelations.add(Relation::Opener);
if (m_relList)
m_relList->associatedAttributeValueChanged(value);
}
else
HTMLElement::parseAttribute(name, value);
}
bool HTMLAnchorElement::isURLAttribute(const Attribute& attribute) const
{
return attribute.name().localName() == hrefAttr || HTMLElement::isURLAttribute(attribute);
}
bool HTMLAnchorElement::canStartSelection() const
{
if (!isLink())
return HTMLElement::canStartSelection();
return hasEditableStyle();
}
bool HTMLAnchorElement::draggable() const
{
const AtomString& value = attributeWithoutSynchronization(draggableAttr);
if (equalLettersIgnoringASCIICase(value, "true"_s))
return true;
if (equalLettersIgnoringASCIICase(value, "false"_s))
return false;
return hasAttributeWithoutSynchronization(hrefAttr);
}
URL HTMLAnchorElement::href() const
{
return document().completeURL(attributeWithoutSynchronization(hrefAttr));
}
void HTMLAnchorElement::setHref(const AtomString& value)
{
setAttributeWithoutSynchronization(hrefAttr, value);
}
bool HTMLAnchorElement::hasRel(Relation relation) const
{
return m_linkRelations.contains(relation);
}
DOMTokenList& HTMLAnchorElement::relList()
{
if (!m_relList) {
m_relList = makeUnique<DOMTokenList>(*this, HTMLNames::relAttr, [](Document& document, StringView token) {
#if USE(SYSTEM_PREVIEW)
if (equalLettersIgnoringASCIICase(token, "ar"_s))
return document.settings().systemPreviewEnabled();
#else
UNUSED_PARAM(document);
#endif
return equalLettersIgnoringASCIICase(token, "noreferrer"_s) || equalLettersIgnoringASCIICase(token, "noopener"_s) || equalLettersIgnoringASCIICase(token, "opener"_s);
});
}
return *m_relList;
}
const AtomString& HTMLAnchorElement::name() const
{
return getNameAttribute();
}
int HTMLAnchorElement::defaultTabIndex() const
{
return 0;
}
AtomString HTMLAnchorElement::target() const
{
return attributeWithoutSynchronization(targetAttr);
}
String HTMLAnchorElement::origin() const
{
return SecurityOrigin::create(href()).get().toString();
}
String HTMLAnchorElement::text()
{
return textContent();
}
void HTMLAnchorElement::setText(String&& text)
{
setTextContent(WTFMove(text));
}
bool HTMLAnchorElement::isLiveLink() const
{
return isLink() && treatLinkAsLiveForEventType(m_wasShiftKeyDownOnMouseDown ? MouseEventWithShiftKey : MouseEventWithoutShiftKey);
}
void HTMLAnchorElement::sendPings(const URL& destinationURL)
{
if (!document().frame())
return;
if (!hasAttributeWithoutSynchronization(pingAttr) || !document().settings().hyperlinkAuditingEnabled())
return;
SpaceSplitString pingURLs(attributeWithoutSynchronization(pingAttr), SpaceSplitString::ShouldFoldCase::No);
for (unsigned i = 0; i < pingURLs.size(); i++)
PingLoader::sendPing(*document().frame(), document().completeURL(pingURLs[i]), destinationURL);
}
#if USE(SYSTEM_PREVIEW)
bool HTMLAnchorElement::isSystemPreviewLink()
{
if (!document().settings().systemPreviewEnabled())
return false;
static MainThreadNeverDestroyed<const AtomString> systemPreviewRelValue("ar"_s);
if (!relList().contains(systemPreviewRelValue))
return false;
if (auto* child = firstElementChild()) {
if (is<HTMLImageElement>(child) || is<HTMLPictureElement>(child)) {
auto numChildren = childElementCount();
// FIXME: We've documented that it should be the only child, but some early demos have two children.
return numChildren == 1 || numChildren == 2;
}
}
return false;
}
#endif
std::optional<URL> HTMLAnchorElement::attributionDestinationURLForPCM() const
{
URL destinationURL { attributeWithoutSynchronization(attributiondestinationAttr) };
if (destinationURL.isValid() && destinationURL.protocolIsInHTTPFamily())
return destinationURL;
document().addConsoleMessage(MessageSource::Other, MessageLevel::Warning, "attributiondestination could not be converted to a valid HTTP-family URL."_s);
return std::nullopt;
}
std::optional<RegistrableDomain> HTMLAnchorElement::mainDocumentRegistrableDomainForPCM() const
{
if (auto frame = document().frame()) {
if (auto mainDocument = frame->mainFrame().document()) {
if (auto mainDocumentRegistrableDomain = RegistrableDomain { mainDocument->url() }; !mainDocumentRegistrableDomain.isEmpty())
return mainDocumentRegistrableDomain;
}
}
document().addConsoleMessage(MessageSource::Other, MessageLevel::Warning, "Could not find a main document to use as source site for Private Click Measurement."_s);
return std::nullopt;
}
std::optional<PrivateClickMeasurement::EphemeralNonce> HTMLAnchorElement::attributionSourceNonceForPCM() const
{
auto attributionSourceNonceAttr = attributeWithoutSynchronization(attributionsourcenonceAttr);
if (attributionSourceNonceAttr.isEmpty())
return std::nullopt;
auto ephemeralNonce = PrivateClickMeasurement::EphemeralNonce { attributionSourceNonceAttr };
if (!ephemeralNonce.isValid()) {
document().addConsoleMessage(MessageSource::Other, MessageLevel::Warning, "attributionsourcenonce was not valid."_s);
return std::nullopt;
}
return ephemeralNonce;
}
std::optional<PrivateClickMeasurement> HTMLAnchorElement::parsePrivateClickMeasurementForSKAdNetwork(const URL& hrefURL) const
{
if (!document().settings().sKAttributionEnabled())
return std::nullopt;
using SourceID = PrivateClickMeasurement::SourceID;
using SourceSite = PrivateClickMeasurement::SourceSite;
using AttributionDestinationSite = PrivateClickMeasurement::AttributionDestinationSite;
auto adamID = PrivateClickMeasurement::appStoreURLAdamID(hrefURL);
if (!adamID)
return std::nullopt;
auto attributionDestinationDomain = attributionDestinationURLForPCM();
if (!attributionDestinationDomain)
return std::nullopt;
auto mainDocumentRegistrableDomain = mainDocumentRegistrableDomainForPCM();
if (!mainDocumentRegistrableDomain)
return std::nullopt;
auto attributionSourceNonce = attributionSourceNonceForPCM();
if (!attributionSourceNonce)
return std::nullopt;
#if PLATFORM(COCOA)
auto bundleID = applicationBundleIdentifier();
#else
String bundleID;
#endif
auto privateClickMeasurement = PrivateClickMeasurement {
SourceID(0),
SourceSite(WTFMove(*mainDocumentRegistrableDomain)),
AttributionDestinationSite(*attributionDestinationDomain),
bundleID,
WallTime::now(),
PrivateClickMeasurement::AttributionEphemeral::No
};
privateClickMeasurement.setEphemeralSourceNonce(WTFMove(*attributionSourceNonce));
privateClickMeasurement.setAdamID(*adamID);
return privateClickMeasurement;
}
std::optional<PrivateClickMeasurement> HTMLAnchorElement::parsePrivateClickMeasurement(const URL& hrefURL) const
{
using SourceID = PrivateClickMeasurement::SourceID;
using SourceSite = PrivateClickMeasurement::SourceSite;
using AttributionDestinationSite = PrivateClickMeasurement::AttributionDestinationSite;
RefPtr<Frame> frame = document().frame();
auto* page = document().page();
if (!frame || !page || page->sessionID().isEphemeral()
|| !document().settings().privateClickMeasurementEnabled()
|| !UserGestureIndicator::processingUserGesture())
return std::nullopt;
if (auto pcm = parsePrivateClickMeasurementForSKAdNetwork(hrefURL))
return pcm;
auto hasAttributionSourceIDAttr = hasAttributeWithoutSynchronization(attributionsourceidAttr);
auto hasAttributionDestinationAttr = hasAttributeWithoutSynchronization(attributiondestinationAttr);
if (!hasAttributionSourceIDAttr && !hasAttributionDestinationAttr)
return std::nullopt;
auto attributionSourceIDAttr = attributeWithoutSynchronization(attributionsourceidAttr);
auto attributionDestinationAttr = attributeWithoutSynchronization(attributiondestinationAttr);
if (!hasAttributionSourceIDAttr || !hasAttributionDestinationAttr || attributionSourceIDAttr.isEmpty() || attributionDestinationAttr.isEmpty()) {
document().addConsoleMessage(MessageSource::Other, MessageLevel::Warning, "Both attributionsourceid and attributiondestination need to be set for Private Click Measurement to work."_s);
return std::nullopt;
}
auto attributionSourceID = parseHTMLNonNegativeInteger(attributionSourceIDAttr);
if (!attributionSourceID) {
document().addConsoleMessage(MessageSource::Other, MessageLevel::Warning, "attributionsourceid is not a non-negative integer which is required for Private Click Measurement."_s);
return std::nullopt;
}
if (attributionSourceID.value() > PrivateClickMeasurement::SourceID::MaxEntropy) {
document().addConsoleMessage(MessageSource::Other, MessageLevel::Warning, makeString("attributionsourceid must have a non-negative value less than or equal to ", PrivateClickMeasurement::SourceID::MaxEntropy, " for Private Click Measurement."));
return std::nullopt;
}
URL destinationURL { attributionDestinationAttr };
if (!destinationURL.isValid() || !destinationURL.protocolIsInHTTPFamily()) {
document().addConsoleMessage(MessageSource::Other, MessageLevel::Warning, "attributiondestination could not be converted to a valid HTTP-family URL."_s);
return std::nullopt;
}
RegistrableDomain mainDocumentRegistrableDomain;
if (auto mainDocument = frame->mainFrame().document())
mainDocumentRegistrableDomain = RegistrableDomain { mainDocument->url() };
else {
document().addConsoleMessage(MessageSource::Other, MessageLevel::Warning, "Could not find a main document to use as source site for Private Click Measurement."_s);
return std::nullopt;
}
if (mainDocumentRegistrableDomain.matches(destinationURL)) {
document().addConsoleMessage(MessageSource::Other, MessageLevel::Warning, "attributiondestination can not be the same site as the current website."_s);
return std::nullopt;
}
#if PLATFORM(COCOA)
auto bundleID = applicationBundleIdentifier();
#else
String bundleID;
#endif
auto privateClickMeasurement = PrivateClickMeasurement { SourceID(attributionSourceID.value()), SourceSite(WTFMove(mainDocumentRegistrableDomain)), AttributionDestinationSite(destinationURL), bundleID, WallTime::now(), PrivateClickMeasurement::AttributionEphemeral::No };
if (auto ephemeralNonce = attributionSourceNonceForPCM())
privateClickMeasurement.setEphemeralSourceNonce(WTFMove(*ephemeralNonce));
return privateClickMeasurement;
}
void HTMLAnchorElement::handleClick(Event& event)
{
event.setDefaultHandled();
RefPtr<Frame> frame = document().frame();
if (!frame)
return;
if (!hasTagName(aTag) && !isConnected())
return;
StringBuilder url;
url.append(stripLeadingAndTrailingHTMLSpaces(attributeWithoutSynchronization(hrefAttr)));
appendServerMapMousePosition(url, event);
URL completedURL = document().completeURL(url.toString());
#if ENABLE(DATA_DETECTION) && PLATFORM(IOS_FAMILY)
if (DataDetection::isDataDetectorLink(*this) && DataDetection::canPresentDataDetectorsUIForElement(*this)) {
if (auto* page = document().page()) {
if (page->chrome().client().showDataDetectorsUIForElement(*this, event))
return;
}
}
#endif
AtomString downloadAttribute;
#if ENABLE(DOWNLOAD_ATTRIBUTE)
if (document().settings().downloadAttributeEnabled()) {
// Ignore the download attribute completely if the href URL is cross origin.
bool isSameOrigin = completedURL.protocolIsData() || document().securityOrigin().canRequest(completedURL);
if (isSameOrigin)
downloadAttribute = AtomString { ResourceResponse::sanitizeSuggestedFilename(attributeWithoutSynchronization(downloadAttr)) };
else if (hasAttributeWithoutSynchronization(downloadAttr))
document().addConsoleMessage(MessageSource::Security, MessageLevel::Warning, "The download attribute on anchor was ignored because its href URL has a different security origin."_s);
}
#endif
SystemPreviewInfo systemPreviewInfo;
#if USE(SYSTEM_PREVIEW)
systemPreviewInfo.isPreview = isSystemPreviewLink() && document().settings().systemPreviewEnabled();
if (systemPreviewInfo.isPreview) {
systemPreviewInfo.element.elementIdentifier = identifier();
systemPreviewInfo.element.documentIdentifier = document().identifier();
systemPreviewInfo.element.webPageIdentifier = valueOrDefault(document().frame()->loader().pageID());
if (auto* child = firstElementChild())
systemPreviewInfo.previewRect = child->boundsInRootViewSpace();
}
#endif
auto referrerPolicy = hasRel(Relation::NoReferrer) ? ReferrerPolicy::NoReferrer : this->referrerPolicy();
auto effectiveTarget = this->effectiveTarget();
NewFrameOpenerPolicy newFrameOpenerPolicy = NewFrameOpenerPolicy::Allow;
if (hasRel(Relation::NoOpener) || hasRel(Relation::NoReferrer) || (!hasRel(Relation::Opener) && document().settings().blankAnchorTargetImpliesNoOpenerEnabled() && isBlankTargetFrameName(effectiveTarget) && !completedURL.protocolIsJavaScript()))
newFrameOpenerPolicy = NewFrameOpenerPolicy::Suppress;
auto privateClickMeasurement = parsePrivateClickMeasurement(completedURL);
// A matching triggering event needs to happen before an attribution report can be sent.
// Thus, URLs should be empty for now.
ASSERT(!privateClickMeasurement || (privateClickMeasurement->attributionReportClickSourceURL().isNull() && privateClickMeasurement->attributionReportClickDestinationURL().isNull()));
frame->loader().changeLocation(completedURL, effectiveTarget, &event, referrerPolicy, document().shouldOpenExternalURLsPolicyToPropagate(), newFrameOpenerPolicy, downloadAttribute, systemPreviewInfo, WTFMove(privateClickMeasurement));
sendPings(completedURL);
// Preconnect to the link's target for improved page load time.
if (completedURL.protocolIsInHTTPFamily() && ((frame->isMainFrame() && isSelfTargetFrameName(effectiveTarget)) || isBlankTargetFrameName(effectiveTarget))) {
auto storageCredentialsPolicy = frame->page() && frame->page()->canUseCredentialStorage() ? StoredCredentialsPolicy::Use : StoredCredentialsPolicy::DoNotUse;
platformStrategies()->loaderStrategy()->preconnectTo(frame->loader(), completedURL, storageCredentialsPolicy, LoaderStrategy::ShouldPreconnectAsFirstParty::Yes, nullptr);
}
}
// Falls back to using <base> element's target if the anchor does not have one.
AtomString HTMLAnchorElement::effectiveTarget() const
{
auto effectiveTarget = target();
if (effectiveTarget.isEmpty())
effectiveTarget = document().baseTarget();
return effectiveTarget;
}
HTMLAnchorElement::EventType HTMLAnchorElement::eventType(Event& event)
{
if (!is<MouseEvent>(event))
return NonMouseEvent;
return downcast<MouseEvent>(event).shiftKey() ? MouseEventWithShiftKey : MouseEventWithoutShiftKey;
}
bool HTMLAnchorElement::treatLinkAsLiveForEventType(EventType eventType) const
{
if (!hasEditableStyle())
return true;
switch (document().settings().editableLinkBehavior()) {
case EditableLinkBehavior::Default:
case EditableLinkBehavior::AlwaysLive:
return true;
case EditableLinkBehavior::NeverLive:
return false;
// If the selection prior to clicking on this link resided in the same editable block as this link,
// and the shift key isn't pressed, we don't want to follow the link.
case EditableLinkBehavior::LiveWhenNotFocused:
return eventType == MouseEventWithShiftKey || (eventType == MouseEventWithoutShiftKey && rootEditableElementForSelectionOnMouseDown() != rootEditableElement());
case EditableLinkBehavior::OnlyLiveWithShiftKey:
return eventType == MouseEventWithShiftKey;
}
ASSERT_NOT_REACHED();
return false;
}
bool isEnterKeyKeydownEvent(Event& event)
{
return event.type() == eventNames().keydownEvent && is<KeyboardEvent>(event) && downcast<KeyboardEvent>(event).keyIdentifier() == "Enter"_s;
}
bool shouldProhibitLinks(Element* element)
{
return isInSVGImage(element);
}
bool HTMLAnchorElement::willRespondToMouseClickEventsWithEditability(Editability editability) const
{
return isLink() || HTMLElement::willRespondToMouseClickEventsWithEditability(editability);
}
static auto& rootEditableElementMap()
{
static NeverDestroyed<WeakHashMap<HTMLAnchorElement, WeakPtr<Element>>> map;
return map.get();
}
Element* HTMLAnchorElement::rootEditableElementForSelectionOnMouseDown() const
{
if (!m_hasRootEditableElementForSelectionOnMouseDown)
return 0;
return rootEditableElementMap().get(*this).get();
}
void HTMLAnchorElement::clearRootEditableElementForSelectionOnMouseDown()
{
if (!m_hasRootEditableElementForSelectionOnMouseDown)
return;
rootEditableElementMap().remove(*this);
m_hasRootEditableElementForSelectionOnMouseDown = false;
}
void HTMLAnchorElement::setRootEditableElementForSelectionOnMouseDown(Element* element)
{
if (!element) {
clearRootEditableElementForSelectionOnMouseDown();
return;
}
rootEditableElementMap().set(*this, element);
m_hasRootEditableElementForSelectionOnMouseDown = true;
}
void HTMLAnchorElement::setReferrerPolicyForBindings(const AtomString& value)
{
setAttributeWithoutSynchronization(referrerpolicyAttr, value);
}
String HTMLAnchorElement::referrerPolicyForBindings() const
{
return referrerPolicyToString(referrerPolicy());
}
ReferrerPolicy HTMLAnchorElement::referrerPolicy() const
{
if (document().settings().referrerPolicyAttributeEnabled())
return parseReferrerPolicy(attributeWithoutSynchronization(referrerpolicyAttr), ReferrerPolicySource::ReferrerPolicyAttribute).value_or(ReferrerPolicy::EmptyString);
return ReferrerPolicy::EmptyString;
}
}