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webkit / WebKit / 877cc5032c248ceb633b4527392c50ba3651e594 / . / Source / WebCore / dom / Element.cpp
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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Peter Kelly (pmk@post.com)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* (C) 2007 David Smith (catfish.man@gmail.com)
* Copyright (C) 2004-2020 Apple Inc. All rights reserved.
* (C) 2007 Eric Seidel (eric@webkit.org)
*
* 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 "Element.h"
#include "AXObjectCache.h"
#include "Attr.h"
#include "AttributeChangeInvalidation.h"
#include "CSSParser.h"
#include "ChildChangeInvalidation.h"
#include "ChildListMutationScope.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "ClassChangeInvalidation.h"
#include "ComposedTreeAncestorIterator.h"
#include "ComposedTreeIterator.h"
#include "ComputedStylePropertyMapReadOnly.h"
#include "ContainerNodeAlgorithms.h"
#include "CustomElementReactionQueue.h"
#include "CustomElementRegistry.h"
#include "DOMRect.h"
#include "DOMRectList.h"
#include "DOMTokenList.h"
#include "DOMWindow.h"
#include "DocumentInlines.h"
#include "DocumentSharedObjectPool.h"
#include "Editing.h"
#include "ElementAnimationRareData.h"
#include "ElementInlines.h"
#include "ElementIterator.h"
#include "ElementRareData.h"
#include "EventDispatcher.h"
#include "EventHandler.h"
#include "EventLoop.h"
#include "EventNames.h"
#include "FocusController.h"
#include "FocusEvent.h"
#include "Frame.h"
#include "FrameSelection.h"
#include "FrameView.h"
#include "FullscreenManager.h"
#include "GetAnimationsOptions.h"
#include "HTMLBodyElement.h"
#include "HTMLCanvasElement.h"
#include "HTMLDialogElement.h"
#include "HTMLDocument.h"
#include "HTMLHtmlElement.h"
#include "HTMLLabelElement.h"
#include "HTMLNameCollection.h"
#include "HTMLObjectElement.h"
#include "HTMLOptGroupElement.h"
#include "HTMLOptionElement.h"
#include "HTMLParserIdioms.h"
#include "HTMLScriptElement.h"
#include "HTMLSelectElement.h"
#include "HTMLTemplateElement.h"
#include "IdChangeInvalidation.h"
#include "IdTargetObserverRegistry.h"
#include "InspectorInstrumentation.h"
#include "JSLazyEventListener.h"
#include "KeyboardEvent.h"
#include "KeyframeAnimationOptions.h"
#include "KeyframeEffect.h"
#include "Logging.h"
#include "MutationObserverInterestGroup.h"
#include "MutationRecord.h"
#include "NodeRenderStyle.h"
#include "PlatformMouseEvent.h"
#include "PlatformWheelEvent.h"
#include "PointerCaptureController.h"
#include "PointerEvent.h"
#include "PointerLockController.h"
#include "PseudoClassChangeInvalidation.h"
#include "Quirks.h"
#include "RenderFragmentedFlow.h"
#include "RenderLayer.h"
#include "RenderLayerBacking.h"
#include "RenderLayerCompositor.h"
#include "RenderLayerScrollableArea.h"
#include "RenderListBox.h"
#include "RenderTheme.h"
#include "RenderTreeUpdater.h"
#include "RenderView.h"
#include "RenderWidget.h"
#include "RuntimeEnabledFeatures.h"
#include "SVGDocumentExtensions.h"
#include "SVGElementTypeHelpers.h"
#include "SVGNames.h"
#include "SVGSVGElement.h"
#include "SVGScriptElement.h"
#include "ScriptDisallowedScope.h"
#include "ScrollIntoViewOptions.h"
#include "ScrollLatchingController.h"
#include "SecurityPolicyViolationEvent.h"
#include "SelectorQuery.h"
#include "Settings.h"
#include "ShadowRootInit.h"
#include "SimulatedClick.h"
#include "SlotAssignment.h"
#include "StyleInvalidator.h"
#include "StyleProperties.h"
#include "StyleResolver.h"
#include "StyleScope.h"
#include "StyleTreeResolver.h"
#include "TextIterator.h"
#include "TouchAction.h"
#include "VoidCallback.h"
#include "WebAnimation.h"
#include "WebAnimationTypes.h"
#include "WheelEvent.h"
#include "XLinkNames.h"
#include "XMLNSNames.h"
#include "XMLNames.h"
#include "markup.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/text/CString.h>
#include <wtf/text/TextStream.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(Element);
using namespace HTMLNames;
using namespace XMLNames;
static HashMap<Element*, Vector<RefPtr<Attr>>>& attrNodeListMap()
{
static NeverDestroyed<HashMap<Element*, Vector<RefPtr<Attr>>>> map;
return map;
}
static Vector<RefPtr<Attr>>* attrNodeListForElement(Element& element)
{
if (!element.hasSyntheticAttrChildNodes())
return nullptr;
ASSERT(attrNodeListMap().contains(&element));
return &attrNodeListMap().find(&element)->value;
}
static Vector<RefPtr<Attr>>& ensureAttrNodeListForElement(Element& element)
{
if (element.hasSyntheticAttrChildNodes()) {
ASSERT(attrNodeListMap().contains(&element));
return attrNodeListMap().find(&element)->value;
}
ASSERT(!attrNodeListMap().contains(&element));
element.setHasSyntheticAttrChildNodes(true);
return attrNodeListMap().add(&element, Vector<RefPtr<Attr>>()).iterator->value;
}
static void removeAttrNodeListForElement(Element& element)
{
ASSERT(element.hasSyntheticAttrChildNodes());
ASSERT(attrNodeListMap().contains(&element));
attrNodeListMap().remove(&element);
element.setHasSyntheticAttrChildNodes(false);
}
static Attr* findAttrNodeInList(Vector<RefPtr<Attr>>& attrNodeList, const QualifiedName& name)
{
for (auto& node : attrNodeList) {
if (node->qualifiedName().matches(name))
return node.get();
}
return nullptr;
}
static Attr* findAttrNodeInList(Vector<RefPtr<Attr>>& attrNodeList, const AtomString& localName, bool shouldIgnoreAttributeCase)
{
const AtomString& caseAdjustedName = shouldIgnoreAttributeCase ? localName.convertToASCIILowercase() : localName;
for (auto& node : attrNodeList) {
if (node->qualifiedName().localName() == caseAdjustedName)
return node.get();
}
return nullptr;
}
static bool shouldAutofocus(const Element& element)
{
if (!element.hasAttributeWithoutSynchronization(HTMLNames::autofocusAttr))
return false;
auto& document = element.document();
if (!element.isConnected() || !document.hasBrowsingContext())
return false;
if (document.isSandboxed(SandboxAutomaticFeatures)) {
// FIXME: This message should be moved off the console once a solution to https://bugs.webkit.org/show_bug.cgi?id=103274 exists.
document.addConsoleMessage(MessageSource::Security, MessageLevel::Error, "Blocked autofocusing on a form control because the form's frame is sandboxed and the 'allow-scripts' permission is not set."_s);
return false;
}
if (!document.frame()->isMainFrame() && !document.topOrigin().isSameOriginDomain(document.securityOrigin())) {
document.addConsoleMessage(MessageSource::Security, MessageLevel::Error, "Blocked autofocusing on a form control in a cross-origin subframe."_s);
return false;
}
if (document.topDocument().isAutofocusProcessed())
return false;
return true;
}
Ref<Element> Element::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new Element(tagName, document, CreateElement));
}
Element::Element(const QualifiedName& tagName, Document& document, ConstructionType type)
: ContainerNode(document, type)
, m_tagName(tagName)
{
}
Element::~Element()
{
ASSERT(!beforePseudoElement());
ASSERT(!afterPseudoElement());
disconnectFromIntersectionObservers();
disconnectFromResizeObservers();
removeShadowRoot();
if (hasSyntheticAttrChildNodes())
detachAllAttrNodesFromElement();
#if ENABLE(CSS_TYPED_OM)
if (hasRareData()) {
if (auto* map = elementRareData()->attributeStyleMap())
map->clearElement();
}
#endif
if (hasPendingResources()) {
document().accessSVGExtensions().removeElementFromPendingResources(*this);
ASSERT(!hasPendingResources());
}
}
inline ElementRareData& Element::ensureElementRareData()
{
return static_cast<ElementRareData&>(ensureRareData());
}
inline void Node::setTabIndexState(TabIndexState state)
{
auto bitfields = rareDataBitfields();
bitfields.tabIndexState = static_cast<uint16_t>(state);
setRareDataBitfields(bitfields);
}
void Element::setTabIndexExplicitly(std::optional<int> tabIndex)
{
if (!tabIndex) {
setTabIndexState(TabIndexState::NotSet);
return;
}
setTabIndexState([this, value = tabIndex.value()]() {
switch (value) {
case 0:
return TabIndexState::Zero;
case -1:
return TabIndexState::NegativeOne;
default:
ensureElementRareData().setUnusualTabIndex(value);
return TabIndexState::InRareData;
}
}());
}
std::optional<int> Element::tabIndexSetExplicitly() const
{
switch (tabIndexState()) {
case TabIndexState::NotSet:
return std::nullopt;
case TabIndexState::Zero:
return 0;
case TabIndexState::NegativeOne:
return -1;
case TabIndexState::InRareData:
ASSERT(hasRareData());
return elementRareData()->unusualTabIndex();
}
ASSERT_NOT_REACHED();
return std::nullopt;
}
int Element::defaultTabIndex() const
{
return -1;
}
bool Element::isNonceable() const
{
// https://www.w3.org/TR/CSP3/#is-element-nonceable
if (elementRareData()->nonce().isNull())
return false;
if (hasDuplicateAttribute())
return false;
if (hasAttributes()
&& (is<HTMLScriptElement>(*this) || is<SVGScriptElement>(*this))) {
static constexpr auto scriptString = "<script"_s;
static constexpr auto styleString = "<style"_s;
for (const auto& attribute : attributesIterator()) {
auto name = attribute.localName().convertToASCIILowercase();
auto value = attribute.value().convertToASCIILowercase();
if (name.contains(scriptString)
|| name.contains(styleString)
|| value.contains(scriptString)
|| value.contains(styleString))
return false;
}
}
return true;
}
const AtomString& Element::nonce() const
{
if (hasRareData() && isNonceable())
return elementRareData()->nonce();
return emptyAtom();
}
void Element::setNonce(const AtomString& newValue)
{
if (newValue == emptyAtom() && !hasRareData())
return;
ensureElementRareData().setNonce(newValue);
}
void Element::hideNonce()
{
// https://html.spec.whatwg.org/multipage/urls-and-fetching.html#nonce-attributes
if (!isConnected())
return;
const auto& csp = document().contentSecurityPolicy();
if (!csp->isHeaderDelivered())
return;
// Retain previous IDL nonce.
AtomString currentNonce = nonce();
if (!getAttribute(nonceAttr).isEmpty())
setAttribute(nonceAttr, emptyAtom());
setNonce(currentNonce);
}
bool Element::supportsFocus() const
{
return !!tabIndexSetExplicitly();
}
RefPtr<Element> Element::focusDelegate()
{
return this;
}
int Element::tabIndexForBindings() const
{
return valueOrCompute(tabIndexSetExplicitly(), [&] { return defaultTabIndex(); });
}
void Element::setTabIndexForBindings(int value)
{
setIntegralAttribute(tabindexAttr, value);
}
bool Element::isKeyboardFocusable(KeyboardEvent*) const
{
if (!(isFocusable() && !shouldBeIgnoredInSequentialFocusNavigation() && tabIndexSetExplicitly().value_or(0) >= 0))
return false;
if (auto* root = shadowRoot()) {
if (root->delegatesFocus())
return false;
}
return true;
}
bool Element::isMouseFocusable() const
{
return isFocusable();
}
bool Element::shouldUseInputMethod()
{
return computeEditability(UserSelectAllIsAlwaysNonEditable, ShouldUpdateStyle::Update) != Editability::ReadOnly;
}
static bool isForceEvent(const PlatformMouseEvent& platformEvent)
{
return platformEvent.type() == PlatformEvent::MouseForceChanged || platformEvent.type() == PlatformEvent::MouseForceDown || platformEvent.type() == PlatformEvent::MouseForceUp;
}
static bool isCompatibilityMouseEvent(const MouseEvent& mouseEvent)
{
// https://www.w3.org/TR/pointerevents/#compatibility-mapping-with-mouse-events
const auto& type = mouseEvent.type();
auto& eventNames = WebCore::eventNames();
return type != eventNames.clickEvent && type != eventNames.mouseoverEvent && type != eventNames.mouseoutEvent && type != eventNames.mouseenterEvent && type != eventNames.mouseleaveEvent;
}
enum class ShouldIgnoreMouseEvent : bool { No, Yes };
static ShouldIgnoreMouseEvent dispatchPointerEventIfNeeded(Element& element, const MouseEvent& mouseEvent, const PlatformMouseEvent& platformEvent, bool& didNotSwallowEvent)
{
if (auto* page = element.document().page()) {
auto& pointerCaptureController = page->pointerCaptureController();
#if ENABLE(TOUCH_EVENTS)
if (platformEvent.pointerId() != mousePointerID && mouseEvent.type() != eventNames().clickEvent && pointerCaptureController.preventsCompatibilityMouseEventsForIdentifier(platformEvent.pointerId()))
return ShouldIgnoreMouseEvent::Yes;
#else
UNUSED_PARAM(platformEvent);
#endif
if (platformEvent.syntheticClickType() != NoTap)
return ShouldIgnoreMouseEvent::No;
if (auto pointerEvent = pointerCaptureController.pointerEventForMouseEvent(mouseEvent, platformEvent.pointerId(), platformEvent.pointerType())) {
pointerCaptureController.dispatchEvent(*pointerEvent, &element);
if (isCompatibilityMouseEvent(mouseEvent) && pointerCaptureController.preventsCompatibilityMouseEventsForIdentifier(pointerEvent->pointerId()))
return ShouldIgnoreMouseEvent::Yes;
if (pointerEvent->defaultPrevented() || pointerEvent->defaultHandled()) {
didNotSwallowEvent = false;
if (pointerEvent->type() == eventNames().pointerdownEvent)
return ShouldIgnoreMouseEvent::Yes;
}
}
}
return ShouldIgnoreMouseEvent::No;
}
bool Element::dispatchMouseEvent(const PlatformMouseEvent& platformEvent, const AtomString& eventType, int detail, Element* relatedTarget, IsSyntheticClick isSyntheticClick)
{
if (isDisabledFormControl())
return false;
if (isForceEvent(platformEvent) && !document().hasListenerTypeForEventType(platformEvent.type()))
return false;
Ref<MouseEvent> mouseEvent = MouseEvent::create(eventType, document().windowProxy(), platformEvent, detail, relatedTarget);
if (mouseEvent->type().isEmpty())
return true; // Shouldn't happen.
Ref protectedThis { *this };
bool didNotSwallowEvent = true;
if (dispatchPointerEventIfNeeded(*this, mouseEvent.get(), platformEvent, didNotSwallowEvent) == ShouldIgnoreMouseEvent::Yes)
return false;
auto isParentProcessAFullWebBrowser = false;
#if PLATFORM(IOS_FAMILY)
if (Frame* frame = document().frame())
isParentProcessAFullWebBrowser = frame->loader().client().isParentProcessAFullWebBrowser();
#elif PLATFORM(MAC)
isParentProcessAFullWebBrowser = MacApplication::isSafari();
#endif
if (Quirks::StorageAccessResult::ShouldCancelEvent == document().quirks().triggerOptionalStorageAccessQuirk(*this, platformEvent, eventType, detail, relatedTarget, isParentProcessAFullWebBrowser, isSyntheticClick))
return false;
ASSERT(!mouseEvent->target() || mouseEvent->target() != relatedTarget);
dispatchEvent(mouseEvent);
if (mouseEvent->defaultPrevented() || mouseEvent->defaultHandled())
didNotSwallowEvent = false;
if (mouseEvent->type() == eventNames().clickEvent && mouseEvent->detail() == 2) {
// Special case: If it's a double click event, we also send the dblclick event. This is not part
// of the DOM specs, but is used for compatibility with the ondblclick="" attribute. This is treated
// as a separate event in other DOM-compliant browsers like Firefox, and so we do the same.
// FIXME: Is it okay that mouseEvent may have been mutated by scripts via initMouseEvent in dispatchEvent above?
Ref<MouseEvent> doubleClickEvent = MouseEvent::create(eventNames().dblclickEvent,
mouseEvent->bubbles() ? Event::CanBubble::Yes : Event::CanBubble::No,
mouseEvent->cancelable() ? Event::IsCancelable::Yes : Event::IsCancelable::No,
Event::IsComposed::Yes,
mouseEvent->view(), mouseEvent->detail(),
mouseEvent->screenX(), mouseEvent->screenY(), mouseEvent->clientX(), mouseEvent->clientY(),
mouseEvent->modifierKeys(), mouseEvent->button(), mouseEvent->buttons(), mouseEvent->syntheticClickType(), relatedTarget);
if (mouseEvent->defaultHandled())
doubleClickEvent->setDefaultHandled();
dispatchEvent(doubleClickEvent);
if (doubleClickEvent->defaultHandled() || doubleClickEvent->defaultPrevented())
return false;
}
return didNotSwallowEvent;
}
bool Element::dispatchWheelEvent(const PlatformWheelEvent& platformEvent, OptionSet<EventHandling>& processing, Event::IsCancelable isCancelable)
{
auto event = WheelEvent::create(platformEvent, document().windowProxy(), isCancelable);
// Events with no deltas are important because they convey platform information about scroll gestures
// and momentum beginning or ending. However, those events should not be sent to the DOM since some
// websites will break. They need to be dispatched because dispatching them will call into the default
// event handler, and our platform code will correctly handle the phase changes. Calling stopPropagation()
// will prevent the event from being sent to the DOM, but will still call the default event handler.
// FIXME: Move this logic into WheelEvent::create.
if (platformEvent.delta().isZero())
event->stopPropagation();
else
processing.add(EventHandling::DispatchedToDOM);
dispatchEvent(event);
LOG_WITH_STREAM(Scrolling, stream << "Element " << *this << " dispatchWheelEvent: (cancelable " << event->cancelable() << ") defaultPrevented " << event->defaultPrevented() << " defaultHandled " << event->defaultHandled());
if (event->defaultPrevented())
processing.add(EventHandling::DefaultPrevented);
if (event->defaultHandled())
processing.add(EventHandling::DefaultHandled);
return !event->defaultPrevented() && !event->defaultHandled();
}
bool Element::dispatchKeyEvent(const PlatformKeyboardEvent& platformEvent)
{
auto event = KeyboardEvent::create(platformEvent, document().windowProxy());
if (Frame* frame = document().frame()) {
if (frame->eventHandler().accessibilityPreventsEventPropagation(event))
event->stopPropagation();
}
dispatchEvent(event);
return !event->defaultPrevented() && !event->defaultHandled();
}
bool Element::dispatchSimulatedClick(Event* underlyingEvent, SimulatedClickMouseEventOptions eventOptions, SimulatedClickVisualOptions visualOptions)
{
return simulateClick(*this, underlyingEvent, eventOptions, visualOptions, SimulatedClickSource::UserAgent);
}
Ref<Node> Element::cloneNodeInternal(Document& targetDocument, CloningOperation type)
{
switch (type) {
case CloningOperation::OnlySelf:
case CloningOperation::SelfWithTemplateContent:
return cloneElementWithoutChildren(targetDocument);
case CloningOperation::Everything:
break;
}
return cloneElementWithChildren(targetDocument);
}
Ref<Element> Element::cloneElementWithChildren(Document& targetDocument)
{
Ref<Element> clone = cloneElementWithoutChildren(targetDocument);
cloneChildNodes(clone);
return clone;
}
Ref<Element> Element::cloneElementWithoutChildren(Document& targetDocument)
{
Ref<Element> clone = cloneElementWithoutAttributesAndChildren(targetDocument);
// This will catch HTML elements in the wrong namespace that are not correctly copied.
// This is a sanity check as HTML overloads some of the DOM methods.
ASSERT(isHTMLElement() == clone->isHTMLElement());
clone->cloneDataFromElement(*this);
return clone;
}
Ref<Element> Element::cloneElementWithoutAttributesAndChildren(Document& targetDocument)
{
return targetDocument.createElement(tagQName(), false);
}
Ref<Attr> Element::detachAttribute(unsigned index)
{
ASSERT(elementData());
const Attribute& attribute = elementData()->attributeAt(index);
RefPtr<Attr> attrNode = attrIfExists(attribute.name());
if (attrNode)
detachAttrNodeFromElementWithValue(attrNode.get(), attribute.value());
else
attrNode = Attr::create(document(), attribute.name(), attribute.value());
removeAttributeInternal(index, NotInSynchronizationOfLazyAttribute);
return attrNode.releaseNonNull();
}
bool Element::removeAttribute(const QualifiedName& name)
{
if (!elementData())
return false;
unsigned index = elementData()->findAttributeIndexByName(name);
if (index == ElementData::attributeNotFound)
return false;
removeAttributeInternal(index, NotInSynchronizationOfLazyAttribute);
return true;
}
void Element::setBooleanAttribute(const QualifiedName& name, bool value)
{
if (value)
setAttribute(name, emptyAtom());
else
removeAttribute(name);
}
NamedNodeMap& Element::attributes() const
{
ElementRareData& rareData = const_cast<Element*>(this)->ensureElementRareData();
if (NamedNodeMap* attributeMap = rareData.attributeMap())
return *attributeMap;
rareData.setAttributeMap(makeUnique<NamedNodeMap>(const_cast<Element&>(*this)));
return *rareData.attributeMap();
}
Node::NodeType Element::nodeType() const
{
return ELEMENT_NODE;
}
bool Element::hasAttribute(const QualifiedName& name) const
{
return hasAttributeNS(name.namespaceURI(), name.localName());
}
void Element::synchronizeAllAttributes() const
{
if (!elementData())
return;
if (elementData()->styleAttributeIsDirty()) {
ASSERT(isStyledElement());
static_cast<const StyledElement*>(this)->synchronizeStyleAttributeInternal();
}
if (isSVGElement())
downcast<SVGElement>(const_cast<Element&>(*this)).synchronizeAllAttributes();
}
ALWAYS_INLINE void Element::synchronizeAttribute(const QualifiedName& name) const
{
if (!elementData())
return;
if (UNLIKELY(name == styleAttr && elementData()->styleAttributeIsDirty())) {
ASSERT_WITH_SECURITY_IMPLICATION(isStyledElement());
static_cast<const StyledElement*>(this)->synchronizeStyleAttributeInternal();
return;
}
if (isSVGElement())
downcast<SVGElement>(const_cast<Element&>(*this)).synchronizeAttribute(name);
}
static ALWAYS_INLINE bool isStyleAttribute(const Element& element, const AtomString& attributeLocalName)
{
if (shouldIgnoreAttributeCase(element))
return equalLettersIgnoringASCIICase(attributeLocalName, "style"_s);
return attributeLocalName == styleAttr->localName();
}
ALWAYS_INLINE void Element::synchronizeAttribute(const AtomString& localName) const
{
// This version of synchronizeAttribute() is streamlined for the case where you don't have a full QualifiedName,
// e.g when called from DOM API.
if (!elementData())
return;
if (elementData()->styleAttributeIsDirty() && isStyleAttribute(*this, localName)) {
ASSERT_WITH_SECURITY_IMPLICATION(isStyledElement());
static_cast<const StyledElement*>(this)->synchronizeStyleAttributeInternal();
return;
}
if (isSVGElement())
downcast<SVGElement>(const_cast<Element&>(*this)).synchronizeAttribute(QualifiedName(nullAtom(), localName, nullAtom()));
}
const AtomString& Element::getAttribute(const QualifiedName& name) const
{
if (!elementData())
return nullAtom();
synchronizeAttribute(name);
if (const Attribute* attribute = findAttributeByName(name))
return attribute->value();
return nullAtom();
}
Vector<String> Element::getAttributeNames() const
{
Vector<String> attributesVector;
if (!hasAttributes())
return attributesVector;
auto attributes = attributesIterator();
attributesVector.reserveInitialCapacity(attributes.attributeCount());
for (auto& attribute : attributes)
attributesVector.uncheckedAppend(attribute.name().toString());
return attributesVector;
}
bool Element::isFocusable() const
{
if (!isConnected() || !supportsFocus())
return false;
if (!renderer()) {
// Elements in canvas fallback content are not rendered, but they are allowed to be
// focusable as long as their canvas is displayed and visible.
if (auto* canvas = ancestorsOfType<HTMLCanvasElement>(*this).first())
return canvas->isFocusableWithoutResolvingFullStyle();
}
return isFocusableWithoutResolvingFullStyle();
}
bool Element::isUserActionElementInActiveChain() const
{
ASSERT(isUserActionElement());
return document().userActionElements().isInActiveChain(*this);
}
bool Element::isUserActionElementActive() const
{
ASSERT(isUserActionElement());
return document().userActionElements().isActive(*this);
}
bool Element::isUserActionElementFocused() const
{
ASSERT(isUserActionElement());
return document().userActionElements().isFocused(*this);
}
bool Element::isUserActionElementHovered() const
{
ASSERT(isUserActionElement());
return document().userActionElements().isHovered(*this);
}
bool Element::isUserActionElementDragged() const
{
ASSERT(isUserActionElement());
return document().userActionElements().isBeingDragged(*this);
}
bool Element::isUserActionElementHasFocusVisible() const
{
ASSERT(isUserActionElement());
return document().userActionElements().hasFocusVisible(*this);
}
bool Element::isUserActionElementHasFocusWithin() const
{
ASSERT(isUserActionElement());
return document().userActionElements().hasFocusWithin(*this);
}
void Element::setActive(bool value, bool pause, Style::InvalidationScope invalidationScope)
{
if (value == active())
return;
{
Style::PseudoClassChangeInvalidation styleInvalidation(*this, CSSSelector::PseudoClassActive, value, invalidationScope);
document().userActionElements().setActive(*this, value);
}
if (!renderer())
return;
bool reactsToPress = false;
if (renderer()->style().hasEffectiveAppearance() && renderer()->theme().stateChanged(*renderer(), ControlStates::States::Pressed))
reactsToPress = true;
// The rest of this function implements a feature that only works if the
// platform supports immediate invalidations on the ChromeClient, so bail if
// that isn't supported.
if (!document().page()->chrome().client().supportsImmediateInvalidation())
return;
if (reactsToPress && pause) {
// The delay here is subtle. It relies on an assumption, namely that the amount of time it takes
// to repaint the "down" state of the control is about the same time as it would take to repaint the
// "up" state. Once you assume this, you can just delay for 100ms - that time (assuming that after you
// leave this method, it will be about that long before the flush of the up state happens again).
#ifdef HAVE_FUNC_USLEEP
MonotonicTime startTime = MonotonicTime::now();
#endif
document().updateStyleIfNeeded();
// Do an immediate repaint.
if (renderer())
renderer()->repaint();
// FIXME: Come up with a less ridiculous way of doing this.
#ifdef HAVE_FUNC_USLEEP
// Now pause for a small amount of time (1/10th of a second from before we repainted in the pressed state)
Seconds remainingTime = 100_ms - (MonotonicTime::now() - startTime);
if (remainingTime > 0_s)
usleep(static_cast<useconds_t>(remainingTime.microseconds()));
#endif
}
}
static bool shouldAlwaysHaveFocusVisibleWhenFocused(const Element& element)
{
return element.isTextField() || element.isContentEditable() || is<HTMLSelectElement>(element);
}
void Element::setFocus(bool value, FocusVisibility visibility)
{
if (value == focused())
return;
Style::PseudoClassChangeInvalidation focusStyleInvalidation(*this, { { CSSSelector::PseudoClassFocus, value }, { CSSSelector::PseudoClassFocusVisible, value } });
document().userActionElements().setFocused(*this, value);
// Shadow host with a slot that contain focused element is not considered focused.
for (auto* root = containingShadowRoot(); root; root = root->host()->containingShadowRoot()) {
root->setContainsFocusedElement(value);
root->host()->invalidateStyle();
}
for (auto* element = this; element; element = element->parentElementInComposedTree())
element->setHasFocusWithin(value);
setHasFocusVisible(value && (visibility == FocusVisibility::Visible || shouldAlwaysHaveFocusVisibleWhenFocused(*this)));
}
void Element::setHasFocusVisible(bool value)
{
if (!document().settings().focusVisibleEnabled())
return;
#if ASSERT_ENABLED
ASSERT(!value || focused());
ASSERT(!focused() || !shouldAlwaysHaveFocusVisibleWhenFocused(*this) || value);
#endif
if (hasFocusVisible() == value)
return;
document().userActionElements().setHasFocusVisible(*this, value);
}
void Element::setHasFocusWithin(bool value)
{
if (hasFocusWithin() == value)
return;
{
Style::PseudoClassChangeInvalidation styleInvalidation(*this, CSSSelector::PseudoClassFocusWithin, value);
document().userActionElements().setHasFocusWithin(*this, value);
}
}
void Element::setHovered(bool value, Style::InvalidationScope invalidationScope, HitTestRequest)
{
if (value == hovered())
return;
{
Style::PseudoClassChangeInvalidation styleInvalidation(*this, CSSSelector::PseudoClassHover, value, invalidationScope);
document().userActionElements().setHovered(*this, value);
}
if (auto* style = renderStyle(); style && style->hasEffectiveAppearance())
renderer()->theme().stateChanged(*renderer(), ControlStates::States::Hovered);
}
void Element::setBeingDragged(bool value)
{
if (value == isBeingDragged())
return;
Style::PseudoClassChangeInvalidation styleInvalidation(*this, CSSSelector::PseudoClassDrag, value);
document().userActionElements().setBeingDragged(*this, value);
}
inline ScrollAlignment toScrollAlignmentForInlineDirection(std::optional<ScrollLogicalPosition> position, WritingMode writingMode, bool isLTR)
{
switch (position.value_or(ScrollLogicalPosition::Nearest)) {
case ScrollLogicalPosition::Start: {
switch (writingMode) {
case WritingMode::TopToBottom:
case WritingMode::BottomToTop: {
return isLTR ? ScrollAlignment::alignLeftAlways : ScrollAlignment::alignRightAlways;
}
case WritingMode::LeftToRight:
case WritingMode::RightToLeft: {
return isLTR ? ScrollAlignment::alignTopAlways : ScrollAlignment::alignBottomAlways;
}
default:
ASSERT_NOT_REACHED();
return ScrollAlignment::alignLeftAlways;
}
}
case ScrollLogicalPosition::Center:
return ScrollAlignment::alignCenterAlways;
case ScrollLogicalPosition::End: {
switch (writingMode) {
case WritingMode::TopToBottom:
case WritingMode::BottomToTop: {
return isLTR ? ScrollAlignment::alignRightAlways : ScrollAlignment::alignLeftAlways;
}
case WritingMode::LeftToRight:
case WritingMode::RightToLeft: {
return isLTR ? ScrollAlignment::alignBottomAlways : ScrollAlignment::alignTopAlways;
}
default:
ASSERT_NOT_REACHED();
return ScrollAlignment::alignRightAlways;
}
}
case ScrollLogicalPosition::Nearest:
return ScrollAlignment::alignToEdgeIfNeeded;
default:
ASSERT_NOT_REACHED();
return ScrollAlignment::alignToEdgeIfNeeded;
}
}
inline ScrollAlignment toScrollAlignmentForBlockDirection(std::optional<ScrollLogicalPosition> position, WritingMode writingMode)
{
switch (position.value_or(ScrollLogicalPosition::Start)) {
case ScrollLogicalPosition::Start: {
switch (writingMode) {
case WritingMode::TopToBottom:
return ScrollAlignment::alignTopAlways;
case WritingMode::BottomToTop:
return ScrollAlignment::alignBottomAlways;
case WritingMode::LeftToRight:
return ScrollAlignment::alignLeftAlways;
case WritingMode::RightToLeft:
return ScrollAlignment::alignRightAlways;
default:
ASSERT_NOT_REACHED();
return ScrollAlignment::alignTopAlways;
}
}
case ScrollLogicalPosition::Center:
return ScrollAlignment::alignCenterAlways;
case ScrollLogicalPosition::End: {
switch (writingMode) {
case WritingMode::TopToBottom:
return ScrollAlignment::alignBottomAlways;
case WritingMode::BottomToTop:
return ScrollAlignment::alignTopAlways;
case WritingMode::LeftToRight:
return ScrollAlignment::alignRightAlways;
case WritingMode::RightToLeft:
return ScrollAlignment::alignLeftAlways;
default:
ASSERT_NOT_REACHED();
return ScrollAlignment::alignBottomAlways;
}
}
case ScrollLogicalPosition::Nearest:
return ScrollAlignment::alignToEdgeIfNeeded;
default:
ASSERT_NOT_REACHED();
return ScrollAlignment::alignToEdgeIfNeeded;
}
}
void Element::scrollIntoView(std::optional<std::variant<bool, ScrollIntoViewOptions>>&& arg)
{
document().updateLayoutIgnorePendingStylesheets();
if (!renderer())
return;
bool insideFixed;
LayoutRect absoluteBounds = renderer()->absoluteAnchorRectWithScrollMargin(&insideFixed);
ScrollIntoViewOptions options;
if (arg) {
auto value = arg.value();
if (std::holds_alternative<ScrollIntoViewOptions>(value))
options = std::get<ScrollIntoViewOptions>(value);
else if (!std::get<bool>(value))
options.blockPosition = ScrollLogicalPosition::End;
}
auto writingMode = renderer()->style().writingMode();
ScrollAlignment alignX = toScrollAlignmentForInlineDirection(options.inlinePosition, writingMode, renderer()->style().isLeftToRightDirection());
ScrollAlignment alignY = toScrollAlignmentForBlockDirection(options.blockPosition, writingMode);
alignX.disableLegacyHorizontalVisibilityThreshold();
bool isHorizontal = renderer()->style().isHorizontalWritingMode();
ScrollRectToVisibleOptions visibleOptions {
SelectionRevealMode::Reveal,
isHorizontal ? alignX : alignY,
isHorizontal ? alignY : alignX,
ShouldAllowCrossOriginScrolling::No,
options.behavior.value_or(ScrollBehavior::Auto)
};
renderer()->scrollRectToVisible(absoluteBounds, insideFixed, visibleOptions);
}
void Element::scrollIntoView(bool alignToTop)
{
document().updateLayoutIgnorePendingStylesheets();
if (!renderer())
return;
bool insideFixed;
LayoutRect absoluteBounds = renderer()->absoluteAnchorRectWithScrollMargin(&insideFixed);
// Align to the top / bottom and to the closest edge.
auto alignY = alignToTop ? ScrollAlignment::alignTopAlways : ScrollAlignment::alignBottomAlways;
auto alignX = ScrollAlignment::alignToEdgeIfNeeded;
alignX.disableLegacyHorizontalVisibilityThreshold();
renderer()->scrollRectToVisible(absoluteBounds, insideFixed, { SelectionRevealMode::Reveal, alignX, alignY, ShouldAllowCrossOriginScrolling::No });
}
void Element::scrollIntoViewIfNeeded(bool centerIfNeeded)
{
document().updateLayoutIgnorePendingStylesheets();
if (!renderer())
return;
bool insideFixed;
LayoutRect absoluteBounds = renderer()->absoluteAnchorRectWithScrollMargin(&insideFixed);
auto alignY = centerIfNeeded ? ScrollAlignment::alignCenterIfNeeded : ScrollAlignment::alignToEdgeIfNeeded;
auto alignX = centerIfNeeded ? ScrollAlignment::alignCenterIfNeeded : ScrollAlignment::alignToEdgeIfNeeded;
alignX.disableLegacyHorizontalVisibilityThreshold();
renderer()->scrollRectToVisible(absoluteBounds, insideFixed, { SelectionRevealMode::Reveal, alignX, alignY, ShouldAllowCrossOriginScrolling::No });
}
void Element::scrollIntoViewIfNotVisible(bool centerIfNotVisible)
{
document().updateLayoutIgnorePendingStylesheets();
if (!renderer())
return;
bool insideFixed;
LayoutRect absoluteBounds = renderer()->absoluteAnchorRectWithScrollMargin(&insideFixed);
if (centerIfNotVisible)
renderer()->scrollRectToVisible(absoluteBounds, insideFixed, { SelectionRevealMode::Reveal, ScrollAlignment::alignCenterIfNotVisible, ScrollAlignment::alignCenterIfNotVisible, ShouldAllowCrossOriginScrolling::No });
else
renderer()->scrollRectToVisible(absoluteBounds, insideFixed, { SelectionRevealMode::Reveal, ScrollAlignment::alignToEdgeIfNotVisible, ScrollAlignment::alignToEdgeIfNotVisible, ShouldAllowCrossOriginScrolling::No });
}
void Element::scrollBy(const ScrollToOptions& options)
{
ScrollToOptions scrollToOptions = normalizeNonFiniteCoordinatesOrFallBackTo(options, 0, 0);
scrollToOptions.left.value() += scrollLeft();
scrollToOptions.top.value() += scrollTop();
scrollTo(scrollToOptions, ScrollClamping::Clamped, ScrollSnapPointSelectionMethod::Directional);
}
void Element::scrollBy(double x, double y)
{
scrollBy(ScrollToOptions(x, y));
}
void Element::scrollTo(const ScrollToOptions& options, ScrollClamping clamping, ScrollSnapPointSelectionMethod snapPointSelectionMethod)
{
LOG_WITH_STREAM(Scrolling, stream << "Element " << *this << " scrollTo " << options.left << ", " << options.top);
if (!document().settings().CSSOMViewScrollingAPIEnabled()) {
// If the element is the root element and document is in quirks mode, terminate these steps.
// Note that WebKit always uses quirks mode document scrolling behavior. See Document::scrollingElement().
if (this == document().documentElement())
return;
}
if (auto* view = document().view())
view->cancelScheduledScrollToFocusedElement();
document().updateLayoutIgnorePendingStylesheets();
if (document().scrollingElement() == this) {
// If the element is the scrolling element and is not potentially scrollable,
// invoke scroll() on window with options as the only argument, and terminate these steps.
// FIXME: Scrolling an independently scrollable body is broken: webkit.org/b/161612.
RefPtr window = document().domWindow();
if (!window)
return;
window->scrollTo(options, clamping, snapPointSelectionMethod);
return;
}
// If the element does not have any associated CSS layout box, the element has no associated scrolling box,
// or the element has no overflow, terminate these steps.
RenderBox* renderer = renderBox();
if (!renderer || !renderer->hasNonVisibleOverflow())
return;
auto scrollToOptions = normalizeNonFiniteCoordinatesOrFallBackTo(options,
adjustForAbsoluteZoom(renderer->scrollLeft(), *renderer),
adjustForAbsoluteZoom(renderer->scrollTop(), *renderer)
);
IntPoint scrollPosition(
clampToInteger(scrollToOptions.left.value() * renderer->style().effectiveZoom()),
clampToInteger(scrollToOptions.top.value() * renderer->style().effectiveZoom())
);
auto animated = useSmoothScrolling(scrollToOptions.behavior.value_or(ScrollBehavior::Auto), this) ? ScrollIsAnimated::Yes : ScrollIsAnimated::No;
auto scrollPositionChangeOptions = ScrollPositionChangeOptions::createProgrammaticWithOptions(clamping, animated, snapPointSelectionMethod);
renderer->setScrollPosition(scrollPosition, scrollPositionChangeOptions);
}
void Element::scrollTo(double x, double y)
{
scrollTo(ScrollToOptions(x, y));
}
void Element::scrollByUnits(int units, ScrollGranularity granularity)
{
document().updateLayoutIgnorePendingStylesheets();
auto* renderer = this->renderer();
if (!renderer)
return;
if (!renderer->hasNonVisibleOverflow())
return;
auto direction = units < 0 ? ScrollUp : ScrollDown;
auto* stopElement = this;
downcast<RenderBox>(*renderer).scroll(direction, granularity, std::abs(units), &stopElement);
}
void Element::scrollByLines(int lines)
{
scrollByUnits(lines, ScrollGranularity::Line);
}
void Element::scrollByPages(int pages)
{
scrollByUnits(pages, ScrollGranularity::Page);
}
static double localZoomForRenderer(const RenderElement& renderer)
{
// FIXME: This does the wrong thing if two opposing zooms are in effect and canceled each
// other out, but the alternative is that we'd have to crawl up the whole render tree every
// time (or store an additional bit in the RenderStyle to indicate that a zoom was specified).
double zoomFactor = 1;
if (renderer.style().effectiveZoom() != 1) {
// Need to find the nearest enclosing RenderElement that set up
// a differing zoom, and then we divide our result by it to eliminate the zoom.
const RenderElement* prev = &renderer;
for (RenderElement* curr = prev->parent(); curr; curr = curr->parent()) {
if (curr->style().effectiveZoom() != prev->style().effectiveZoom()) {
zoomFactor = prev->style().zoom();
break;
}
prev = curr;
}
if (prev->isRenderView())
zoomFactor = prev->style().zoom();
}
return zoomFactor;
}
static int adjustContentsScrollPositionOrSizeForZoom(int value, const Frame& frame)
{
double zoomFactor = frame.pageZoomFactor() * frame.frameScaleFactor();
if (zoomFactor == 1)
return value;
// FIXME (webkit.org/b/189397): Why can't we just ceil/floor?
// Needed because of truncation (rather than rounding) when scaling up.
if (zoomFactor > 1)
value++;
return static_cast<int>(value / zoomFactor);
}
enum LegacyCSSOMElementMetricsRoundingStrategy { Round, Floor };
static int convertToNonSubpixelValue(double value, const LegacyCSSOMElementMetricsRoundingStrategy roundStrategy = Round)
{
return roundStrategy == Round ? std::round(value) : std::floor(value);
}
static int adjustOffsetForZoomAndSubpixelLayout(RenderBoxModelObject& renderer, const LayoutUnit& offset)
{
auto offsetLeft = LayoutUnit { roundToInt(offset) };
double zoomFactor = localZoomForRenderer(renderer);
if (zoomFactor == 1)
return convertToNonSubpixelValue(offsetLeft, Floor);
return convertToNonSubpixelValue(offsetLeft / zoomFactor, Round);
}
static HashSet<TreeScope*> collectAncestorTreeScopeAsHashSet(Node& node)
{
HashSet<TreeScope*> ancestors;
for (auto* currentScope = &node.treeScope(); currentScope; currentScope = currentScope->parentTreeScope())
ancestors.add(currentScope);
return ancestors;
}
int Element::offsetLeftForBindings()
{
auto offset = offsetLeft();
RefPtr parent = offsetParent();
if (!parent || !parent->isInShadowTree())
return offset;
ASSERT(&parent->document() == &document());
if (&parent->treeScope() == &treeScope())
return offset;
auto ancestorTreeScopes = collectAncestorTreeScopeAsHashSet(*this);
while (parent && !ancestorTreeScopes.contains(&parent->treeScope())) {
offset += parent->offsetLeft();
parent = parent->offsetParent();
}
return offset;
}
int Element::offsetLeft()
{
document().updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* renderer = renderBoxModelObject())
return adjustOffsetForZoomAndSubpixelLayout(*renderer, renderer->offsetLeft());
return 0;
}
int Element::offsetTopForBindings()
{
auto offset = offsetTop();
RefPtr parent = offsetParent();
if (!parent || !parent->isInShadowTree())
return offset;
ASSERT(&parent->document() == &document());
if (&parent->treeScope() == &treeScope())
return offset;
auto ancestorTreeScopes = collectAncestorTreeScopeAsHashSet(*this);
while (parent && !ancestorTreeScopes.contains(&parent->treeScope())) {
offset += parent->offsetTop();
parent = parent->offsetParent();
}
return offset;
}
int Element::offsetTop()
{
document().updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* renderer = renderBoxModelObject())
return adjustOffsetForZoomAndSubpixelLayout(*renderer, renderer->offsetTop());
return 0;
}
int Element::offsetWidth()
{
document().updateLayoutIfDimensionsOutOfDate(*this, WidthDimensionsCheck);
if (RenderBoxModelObject* renderer = renderBoxModelObject()) {
auto offsetWidth = LayoutUnit { roundToInt(renderer->offsetWidth()) };
return convertToNonSubpixelValue(adjustLayoutUnitForAbsoluteZoom(offsetWidth, *renderer).toDouble());
}
return 0;
}
int Element::offsetHeight()
{
document().updateLayoutIfDimensionsOutOfDate(*this, HeightDimensionsCheck);
if (RenderBoxModelObject* renderer = renderBoxModelObject()) {
auto offsetHeight = LayoutUnit { roundToInt(renderer->offsetHeight()) };
return convertToNonSubpixelValue(adjustLayoutUnitForAbsoluteZoom(offsetHeight, *renderer).toDouble());
}
return 0;
}
Element* Element::offsetParentForBindings()
{
Element* element = offsetParent();
if (!element || !element->isInShadowTree())
return element;
while (element && !isDescendantOrShadowDescendantOf(&element->rootNode()))
element = element->offsetParent();
return element;
}
Element* Element::offsetParent()
{
document().updateLayoutIgnorePendingStylesheets();
auto renderer = this->renderer();
if (!renderer)
return nullptr;
auto offsetParent = renderer->offsetParent();
if (!offsetParent)
return nullptr;
return offsetParent->element();
}
int Element::clientLeft()
{
document().updateLayoutIgnorePendingStylesheets();
if (auto* renderer = renderBox()) {
auto clientLeft = LayoutUnit { roundToInt(renderer->clientLeft()) };
return convertToNonSubpixelValue(adjustLayoutUnitForAbsoluteZoom(clientLeft, *renderer).toDouble());
}
return 0;
}
int Element::clientTop()
{
document().updateLayoutIgnorePendingStylesheets();
if (auto* renderer = renderBox()) {
auto clientTop = LayoutUnit { roundToInt(renderer->clientTop()) };
return convertToNonSubpixelValue(adjustLayoutUnitForAbsoluteZoom(clientTop, *renderer).toDouble());
}
return 0;
}
int Element::clientWidth()
{
document().updateLayoutIfDimensionsOutOfDate(*this, WidthDimensionsCheck);
if (!document().hasLivingRenderTree())
return 0;
RenderView& renderView = *document().renderView();
// When in strict mode, clientWidth for the document element should return the width of the containing frame.
// When in quirks mode, clientWidth for the body element should return the width of the containing frame.
bool inQuirksMode = document().inQuirksMode();
if ((!inQuirksMode && document().documentElement() == this) || (inQuirksMode && isHTMLElement() && document().bodyOrFrameset() == this))
return adjustForAbsoluteZoom(renderView.frameView().layoutWidth(), renderView);
if (RenderBox* renderer = renderBox()) {
auto clientWidth = LayoutUnit { roundToInt(renderer->clientWidth()) };
// clientWidth/Height is the visual portion of the box content, not including
// borders or scroll bars, but includes padding. And per
// https://www.w3.org/TR/CSS2/tables.html#model,
// table wrapper box is a principal block box that contains the table box
// itself and any caption boxes, and table grid box is a block-level box that
// contains the table's internal table boxes. When table's border is specified
// in CSS, the border is added to table grid box, not table wrapper box.
// Currently, WebKit doesn't have table wrapper box, and we are supposed to
// retrieve clientWidth/Height from table wrapper box, not table grid box. So
// when we retrieve clientWidth/Height, it includes table's border size.
if (renderer->isTable())
clientWidth += renderer->borderLeft() + renderer->borderRight();
return convertToNonSubpixelValue(adjustLayoutUnitForAbsoluteZoom(clientWidth, *renderer).toDouble());
}
return 0;
}
int Element::clientHeight()
{
document().updateLayoutIfDimensionsOutOfDate(*this, HeightDimensionsCheck);
if (!document().hasLivingRenderTree())
return 0;
RenderView& renderView = *document().renderView();
// When in strict mode, clientHeight for the document element should return the height of the containing frame.
// When in quirks mode, clientHeight for the body element should return the height of the containing frame.
bool inQuirksMode = document().inQuirksMode();
if ((!inQuirksMode && document().documentElement() == this) || (inQuirksMode && isHTMLElement() && document().bodyOrFrameset() == this))
return adjustForAbsoluteZoom(renderView.frameView().layoutHeight(), renderView);
if (RenderBox* renderer = renderBox()) {
auto clientHeight = LayoutUnit { roundToInt(renderer->clientHeight()) };
// clientWidth/Height is the visual portion of the box content, not including
// borders or scroll bars, but includes padding. And per
// https://www.w3.org/TR/CSS2/tables.html#model,
// table wrapper box is a principal block box that contains the table box
// itself and any caption boxes, and table grid box is a block-level box that
// contains the table's internal table boxes. When table's border is specified
// in CSS, the border is added to table grid box, not table wrapper box.
// Currently, WebKit doesn't have table wrapper box, and we are supposed to
// retrieve clientWidth/Height from table wrapper box, not table grid box. So
// when we retrieve clientWidth/Height, it includes table's border size.
if (renderer->isTable())
clientHeight += renderer->borderTop() + renderer->borderBottom();
return convertToNonSubpixelValue(adjustLayoutUnitForAbsoluteZoom(clientHeight, *renderer).toDouble());
}
return 0;
}
ALWAYS_INLINE Frame* Element::documentFrameWithNonNullView() const
{
auto* frame = document().frame();
return frame && frame->view() ? frame : nullptr;
}
int Element::scrollLeft()
{
document().updateLayoutIgnorePendingStylesheets();
if (document().scrollingElement() == this) {
if (auto* frame = documentFrameWithNonNullView())
return adjustContentsScrollPositionOrSizeForZoom(frame->view()->contentsScrollPosition().x(), *frame);
return 0;
}
if (auto* renderer = renderBox())
return adjustForAbsoluteZoom(renderer->scrollLeft(), *renderer);
return 0;
}
int Element::scrollTop()
{
document().updateLayoutIgnorePendingStylesheets();
if (document().scrollingElement() == this) {
if (auto* frame = documentFrameWithNonNullView())
return adjustContentsScrollPositionOrSizeForZoom(frame->view()->contentsScrollPosition().y(), *frame);
return 0;
}
if (RenderBox* renderer = renderBox())
return adjustForAbsoluteZoom(renderer->scrollTop(), *renderer);
return 0;
}
void Element::setScrollLeft(int newLeft)
{
document().updateLayoutIgnorePendingStylesheets();
auto options = ScrollPositionChangeOptions::createProgrammatic();
options.animated = useSmoothScrolling(ScrollBehavior::Auto, this) ? ScrollIsAnimated::Yes : ScrollIsAnimated::No;
if (document().scrollingElement() == this) {
if (RefPtr frame = documentFrameWithNonNullView()) {
IntPoint position(static_cast<int>(newLeft * frame->pageZoomFactor() * frame->frameScaleFactor()), frame->view()->scrollY());
frame->view()->setScrollPosition(position, options);
}
return;
}
if (WeakPtr renderer = renderBox()) {
int clampedLeft = clampToInteger(newLeft * renderer->style().effectiveZoom());
renderer->setScrollLeft(clampedLeft, options);
if (auto* scrollableArea = renderer && renderer->layer() ? renderer->layer()->scrollableArea() : nullptr)
scrollableArea->setScrollShouldClearLatchedState(true);
}
}
void Element::setScrollTop(int newTop)
{
document().updateLayoutIgnorePendingStylesheets();
auto options = ScrollPositionChangeOptions::createProgrammatic();
options.animated = useSmoothScrolling(ScrollBehavior::Auto, this) ? ScrollIsAnimated::Yes : ScrollIsAnimated::No;
if (document().scrollingElement() == this) {
if (RefPtr frame = documentFrameWithNonNullView()) {
IntPoint position(frame->view()->scrollX(), static_cast<int>(newTop * frame->pageZoomFactor() * frame->frameScaleFactor()));
frame->view()->setScrollPosition(position, options);
}
return;
}
if (WeakPtr renderer = renderBox()) {
int clampedTop = clampToInteger(newTop * renderer->style().effectiveZoom());
renderer->setScrollTop(clampedTop, options);
if (auto* scrollableArea = renderer && renderer->layer() ? renderer->layer()->scrollableArea() : nullptr)
scrollableArea->setScrollShouldClearLatchedState(true);
}
}
int Element::scrollWidth()
{
document().updateLayoutIfDimensionsOutOfDate(*this, WidthDimensionsCheck);
if (document().scrollingElement() == this) {
// FIXME (webkit.org/b/182289): updateLayoutIfDimensionsOutOfDate seems to ignore zoom level change.
document().updateLayoutIgnorePendingStylesheets();
if (auto* frame = documentFrameWithNonNullView())
return adjustContentsScrollPositionOrSizeForZoom(frame->view()->contentsWidth(), *frame);
return 0;
}
if (auto* renderer = renderBox())
return adjustForAbsoluteZoom(renderer->scrollWidth(), *renderer);
return 0;
}
int Element::scrollHeight()
{
document().updateLayoutIfDimensionsOutOfDate(*this, HeightDimensionsCheck);
if (document().scrollingElement() == this) {
// FIXME (webkit.org/b/182289): updateLayoutIfDimensionsOutOfDate seems to ignore zoom level change.
document().updateLayoutIgnorePendingStylesheets();
if (auto* frame = documentFrameWithNonNullView())
return adjustContentsScrollPositionOrSizeForZoom(frame->view()->contentsHeight(), *frame);
return 0;
}
if (auto* renderer = renderBox())
return adjustForAbsoluteZoom(renderer->scrollHeight(), *renderer);
return 0;
}
IntRect Element::boundsInRootViewSpace()
{
document().updateLayoutIgnorePendingStylesheets();
FrameView* view = document().view();
if (!view)
return IntRect();
Vector<FloatQuad> quads;
if (isSVGElement() && renderer()) {
// Get the bounding rectangle from the SVG model.
SVGElement& svgElement = downcast<SVGElement>(*this);
if (auto localRect = svgElement.getBoundingBox())
quads.append(renderer()->localToAbsoluteQuad(*localRect));
} else {
// Get the bounding rectangle from the box model.
if (renderBoxModelObject())
renderBoxModelObject()->absoluteQuads(quads);
}
return view->contentsToRootView(enclosingIntRect(unitedBoundingBoxes(quads)));
}
IntRect Element::boundingBoxInRootViewCoordinates() const
{
if (RenderObject* renderer = this->renderer())
return document().view()->contentsToRootView(renderer->absoluteBoundingBoxRect());
return IntRect();
}
static bool layoutOverflowRectContainsAllDescendants(const RenderBox& renderBox)
{
if (renderBox.isRenderView())
return true;
if (!renderBox.element())
return false;
// If there are any position:fixed inside of us, game over.
if (auto* viewPositionedObjects = renderBox.view().positionedObjects()) {
for (auto* positionedBox : *viewPositionedObjects) {
if (positionedBox == &renderBox)
continue;
if (positionedBox->isFixedPositioned() && renderBox.element()->contains(positionedBox->element()))
return false;
}
}
if (renderBox.canContainAbsolutelyPositionedObjects()) {
// Our layout overflow will include all descendant positioned elements.
return true;
}
// This renderer may have positioned descendants whose containing block is some ancestor.
if (auto* containingBlock = RenderObject::containingBlockForPositionType(PositionType::Absolute, renderBox)) {
if (auto* positionedObjects = containingBlock->positionedObjects()) {
for (auto* positionedBox : *positionedObjects) {
if (positionedBox == &renderBox)
continue;
if (renderBox.element()->contains(positionedBox->element()))
return false;
}
}
}
return false;
}
LayoutRect Element::absoluteEventBounds(bool& boundsIncludeAllDescendantElements, bool& includesFixedPositionElements)
{
boundsIncludeAllDescendantElements = false;
includesFixedPositionElements = false;
if (!renderer())
return LayoutRect();
LayoutRect result;
if (isSVGElement()) {
// Get the bounding rectangle from the SVG model.
SVGElement& svgElement = downcast<SVGElement>(*this);
if (auto localRect = svgElement.getBoundingBox())
result = LayoutRect(renderer()->localToAbsoluteQuad(*localRect, UseTransforms, &includesFixedPositionElements).boundingBox());
} else {
auto* renderer = this->renderer();
if (is<RenderBox>(renderer)) {
auto& box = downcast<RenderBox>(*renderer);
bool computedBounds = false;
if (RenderFragmentedFlow* fragmentedFlow = box.enclosingFragmentedFlow()) {
bool wasFixed = false;
Vector<FloatQuad> quads;
if (fragmentedFlow->absoluteQuadsForBox(quads, &wasFixed, &box)) {
result = LayoutRect(unitedBoundingBoxes(quads));
computedBounds = true;
} else {
// Probably columns. Just return the bounds of the multicol block for now.
// FIXME: this doesn't handle nested columns.
RenderElement* multicolContainer = fragmentedFlow->parent();
if (multicolContainer && is<RenderBox>(multicolContainer)) {
auto overflowRect = downcast<RenderBox>(*multicolContainer).layoutOverflowRect();
result = LayoutRect(multicolContainer->localToAbsoluteQuad(FloatRect(overflowRect), UseTransforms, &includesFixedPositionElements).boundingBox());
computedBounds = true;
}
}
}
if (!computedBounds) {
LayoutRect overflowRect = box.layoutOverflowRect();
result = LayoutRect(box.localToAbsoluteQuad(FloatRect(overflowRect), UseTransforms, &includesFixedPositionElements).boundingBox());
boundsIncludeAllDescendantElements = layoutOverflowRectContainsAllDescendants(box);
}
} else
result = LayoutRect(renderer->absoluteBoundingBoxRect(true /* useTransforms */, &includesFixedPositionElements));
}
return result;
}
LayoutRect Element::absoluteEventBoundsOfElementAndDescendants(bool& includesFixedPositionElements)
{
bool boundsIncludeDescendants;
LayoutRect result = absoluteEventBounds(boundsIncludeDescendants, includesFixedPositionElements);
if (boundsIncludeDescendants)
return result;
for (auto& child : childrenOfType<Element>(*this)) {
bool includesFixedPosition = false;
LayoutRect childBounds = child.absoluteEventBoundsOfElementAndDescendants(includesFixedPosition);
includesFixedPositionElements |= includesFixedPosition;
result.unite(childBounds);
}
return result;
}
LayoutRect Element::absoluteEventHandlerBounds(bool& includesFixedPositionElements)
{
// This is not web-exposed, so don't call the FOUC-inducing updateLayoutIgnorePendingStylesheets().
FrameView* frameView = document().view();
if (!frameView)
return LayoutRect();
return absoluteEventBoundsOfElementAndDescendants(includesFixedPositionElements);
}
static std::optional<std::pair<RenderObject*, LayoutRect>> listBoxElementBoundingBox(const Element& element)
{
HTMLSelectElement* selectElement;
bool isGroup;
if (is<HTMLOptionElement>(element)) {
selectElement = downcast<HTMLOptionElement>(element).ownerSelectElement();
isGroup = false;
} else if (is<HTMLOptGroupElement>(element)) {
selectElement = downcast<HTMLOptGroupElement>(element).ownerSelectElement();
isGroup = true;
} else
return std::nullopt;
if (!selectElement || !selectElement->renderer() || !is<RenderListBox>(selectElement->renderer()))
return std::nullopt;
auto& renderer = downcast<RenderListBox>(*selectElement->renderer());
std::optional<LayoutRect> boundingBox;
int optionIndex = 0;
for (auto* item : selectElement->listItems()) {
if (item == &element) {
LayoutPoint additionOffset;
boundingBox = renderer.itemBoundingBoxRect(additionOffset, optionIndex);
if (!isGroup)
break;
} else if (isGroup && boundingBox) {
if (item->parentNode() != &element)
break;
LayoutPoint additionOffset;
boundingBox->setHeight(boundingBox->height() + renderer.itemBoundingBoxRect(additionOffset, optionIndex).height());
}
++optionIndex;
}
if (!boundingBox)
return std::nullopt;
return std::pair<RenderObject*, LayoutRect> { &renderer, boundingBox.value() };
}
Ref<DOMRectList> Element::getClientRects()
{
document().updateLayoutIgnorePendingStylesheets();
RenderObject* renderer = this->renderer();
Vector<FloatQuad> quads;
if (auto pair = listBoxElementBoundingBox(*this)) {
renderer = pair.value().first;
quads.append(renderer->localToAbsoluteQuad(FloatQuad { pair.value().second }));
} else if (auto* renderBoxModelObject = this->renderBoxModelObject())
renderBoxModelObject->absoluteQuads(quads);
else if (isSVGElement() && renderer)
renderer->absoluteQuads(quads);
// FIXME: Handle table/inline-table with a caption.
if (quads.isEmpty())
return DOMRectList::create();
document().convertAbsoluteToClientQuads(quads, renderer->style());
return DOMRectList::create(quads);
}
std::optional<std::pair<RenderObject*, FloatRect>> Element::boundingAbsoluteRectWithoutLayout() const
{
RenderObject* renderer = this->renderer();
Vector<FloatQuad> quads;
if (isSVGElement() && renderer && !renderer->isSVGRootOrLegacySVGRoot()) {
// Get the bounding rectangle from the SVG model.
if (auto localRect = downcast<SVGElement>(*this).getBoundingBox())
quads.append(renderer->localToAbsoluteQuad(*localRect));
} else if (auto pair = listBoxElementBoundingBox(*this)) {
renderer = pair.value().first;
quads.append(renderer->localToAbsoluteQuad(FloatQuad { pair.value().second }));
} else if (auto* renderBoxModelObject = this->renderBoxModelObject())
renderBoxModelObject->absoluteQuads(quads);
if (quads.isEmpty())
return std::nullopt;
return std::make_pair(renderer, unitedBoundingBoxes(quads));
}
FloatRect Element::boundingClientRect()
{
document().updateLayoutIgnorePendingStylesheets();
auto pair = boundingAbsoluteRectWithoutLayout();
if (!pair)
return { };
RenderObject* renderer = pair->first;
FloatRect result = pair->second;
document().convertAbsoluteToClientRect(result, renderer->style());
return result;
}
Ref<DOMRect> Element::getBoundingClientRect()
{
return DOMRect::create(boundingClientRect());
}
IntRect Element::screenRect() const
{
if (RenderObject* renderer = this->renderer())
return document().view()->contentsToScreen(renderer->absoluteBoundingBoxRect());
return IntRect();
}
const AtomString& Element::getAttribute(const AtomString& qualifiedName) const
{
if (!elementData() || qualifiedName.isEmpty())
return nullAtom();
synchronizeAttribute(qualifiedName);
if (const Attribute* attribute = elementData()->findAttributeByName(qualifiedName, shouldIgnoreAttributeCase(*this)))
return attribute->value();
return nullAtom();
}
const AtomString& Element::getAttributeNS(const AtomString& namespaceURI, const AtomString& localName) const
{
return getAttribute(QualifiedName(nullAtom(), localName, namespaceURI));
}
// https://dom.spec.whatwg.org/#dom-element-toggleattribute
ExceptionOr<bool> Element::toggleAttribute(const AtomString& qualifiedName, std::optional<bool> force)
{
if (!Document::isValidName(qualifiedName))
return Exception { InvalidCharacterError };
synchronizeAttribute(qualifiedName);
auto caseAdjustedQualifiedName = shouldIgnoreAttributeCase(*this) ? qualifiedName.convertToASCIILowercase() : qualifiedName;
unsigned index = elementData() ? elementData()->findAttributeIndexByName(caseAdjustedQualifiedName, false) : ElementData::attributeNotFound;
if (index == ElementData::attributeNotFound) {
if (!force || *force) {
setAttributeInternal(index, QualifiedName { nullAtom(), caseAdjustedQualifiedName, nullAtom() }, emptyAtom(), NotInSynchronizationOfLazyAttribute);
return true;
}
return false;
}
if (!force || !*force) {
removeAttributeInternal(index, NotInSynchronizationOfLazyAttribute);
return false;
}
return true;
}
ExceptionOr<void> Element::setAttribute(const AtomString& qualifiedName, const AtomString& value)
{
if (!Document::isValidName(qualifiedName))
return Exception { InvalidCharacterError };
synchronizeAttribute(qualifiedName);
auto caseAdjustedQualifiedName = shouldIgnoreAttributeCase(*this) ? qualifiedName.convertToASCIILowercase() : qualifiedName;
unsigned index = elementData() ? elementData()->findAttributeIndexByName(caseAdjustedQualifiedName, false) : ElementData::attributeNotFound;
auto name = index != ElementData::attributeNotFound ? attributeAt(index).name() : QualifiedName { nullAtom(), caseAdjustedQualifiedName, nullAtom() };
setAttributeInternal(index, name, value, NotInSynchronizationOfLazyAttribute);
return { };
}
void Element::setAttribute(const QualifiedName& name, const AtomString& value)
{
synchronizeAttribute(name);
unsigned index = elementData() ? elementData()->findAttributeIndexByName(name) : ElementData::attributeNotFound;
setAttributeInternal(index, name, value, NotInSynchronizationOfLazyAttribute);
}
void Element::setAttributeWithoutSynchronization(const QualifiedName& name, const AtomString& value)
{
unsigned index = elementData() ? elementData()->findAttributeIndexByName(name) : ElementData::attributeNotFound;
setAttributeInternal(index, name, value, NotInSynchronizationOfLazyAttribute);
}
void Element::setSynchronizedLazyAttribute(const QualifiedName& name, const AtomString& value)
{
unsigned index = elementData() ? elementData()->findAttributeIndexByName(name) : ElementData::attributeNotFound;
setAttributeInternal(index, name, value, InSynchronizationOfLazyAttribute);
}
inline void Element::setAttributeInternal(unsigned index, const QualifiedName& name, const AtomString& newValue, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
{
ASSERT_WITH_MESSAGE(refCount() || parentNode(), "Attribute must not be set on an element before adoptRef");
if (newValue.isNull()) {
if (index != ElementData::attributeNotFound)
removeAttributeInternal(index, inSynchronizationOfLazyAttribute);
return;
}
if (index == ElementData::attributeNotFound) {
addAttributeInternal(name, newValue, inSynchronizationOfLazyAttribute);
return;
}
if (inSynchronizationOfLazyAttribute) {
ensureUniqueElementData().attributeAt(index).setValue(newValue);
return;
}
const Attribute& attribute = attributeAt(index);
QualifiedName attributeName = attribute.name();
AtomString oldValue = attribute.value();
willModifyAttribute(attributeName, oldValue, newValue);
if (newValue != oldValue) {
Style::AttributeChangeInvalidation styleInvalidation(*this, name, oldValue, newValue);
ensureUniqueElementData().attributeAt(index).setValue(newValue);
}
didModifyAttribute(attributeName, oldValue, newValue);
}
static inline AtomString makeIdForStyleResolution(const AtomString& value, bool inQuirksMode)
{
if (inQuirksMode)
return value.convertToASCIILowercase();
return value;
}
static inline bool isElementReflectionAttribute(const QualifiedName& name)
{
return name == HTMLNames::aria_activedescendantAttr || name == HTMLNames::aria_errormessageAttr;
}
static inline bool isElementsArrayReflectionAttribute(const QualifiedName& name)
{
return name == HTMLNames::aria_controlsAttr
|| name == HTMLNames::aria_describedbyAttr
|| name == HTMLNames::aria_detailsAttr
|| name == HTMLNames::aria_flowtoAttr
|| name == HTMLNames::aria_labelledbyAttr
|| name == HTMLNames::aria_ownsAttr;
}
void Element::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason)
{
bool valueIsSameAsBefore = oldValue == newValue;
if (!valueIsSameAsBefore) {
if (name == HTMLNames::accesskeyAttr)
document().invalidateAccessKeyCache();
else if (name == HTMLNames::classAttr)
classAttributeChanged(newValue);
else if (name == HTMLNames::idAttr) {
AtomString oldId = elementData()->idForStyleResolution();
AtomString newId = makeIdForStyleResolution(newValue, document().inQuirksMode());
if (newId != oldId) {
Style::IdChangeInvalidation styleInvalidation(*this, oldId, newId);
elementData()->setIdForStyleResolution(newId);
}
if (!oldValue.isEmpty())
treeScope().idTargetObserverRegistry().notifyObservers(*oldValue.impl());
if (!newValue.isEmpty())
treeScope().idTargetObserverRegistry().notifyObservers(*newValue.impl());
} else if (name == HTMLNames::nameAttr)
elementData()->setHasNameAttribute(!newValue.isNull());
else if (name == HTMLNames::nonceAttr) {
if (is<HTMLElement>(*this) || is<SVGElement>(*this))
setNonce(newValue.isNull() ? emptyAtom() : newValue);
} else if (name == HTMLNames::pseudoAttr) {
if (needsStyleInvalidation() && isInShadowTree())
invalidateStyleForSubtree();
} else if (name == HTMLNames::slotAttr) {
if (auto* parent = parentElement()) {
if (auto* shadowRoot = parent->shadowRoot())
shadowRoot->hostChildElementDidChangeSlotAttribute(*this, oldValue, newValue);
}
} else if (name == HTMLNames::partAttr)
partAttributeChanged(newValue);
else if (document().settings().ariaReflectionForElementReferencesEnabled() && (isElementReflectionAttribute(name) || isElementsArrayReflectionAttribute(name))) {
if (auto* map = explicitlySetAttrElementsMapIfExists())
map->remove(name);
} else if (name == HTMLNames::exportpartsAttr) {
if (auto* shadowRoot = this->shadowRoot()) {
shadowRoot->invalidatePartMappings();
Style::Invalidator::invalidateShadowParts(*shadowRoot);
}
}
}
parseAttribute(name, newValue);
document().incDOMTreeVersion();
if (UNLIKELY(isDefinedCustomElement()))
CustomElementReactionQueue::enqueueAttributeChangedCallbackIfNeeded(*this, name, oldValue, newValue);
if (valueIsSameAsBefore)
return;
invalidateNodeListAndCollectionCachesInAncestorsForAttribute(name);
if (AXObjectCache* cache = document().existingAXObjectCache())
cache->deferAttributeChangeIfNeeded(name, this);
}
ExplicitlySetAttrElementsMap& Element::explicitlySetAttrElementsMap()
{
return ensureElementRareData().explicitlySetAttrElementsMap();
}
ExplicitlySetAttrElementsMap* Element::explicitlySetAttrElementsMapIfExists() const
{
return hasRareData() ? &elementRareData()->explicitlySetAttrElementsMap() : nullptr;
}
Element* Element::getElementAttribute(const QualifiedName& attributeName) const
{
ASSERT(document().settings().ariaReflectionForElementReferencesEnabled());
ASSERT(isElementReflectionAttribute(attributeName));
if (auto* map = explicitlySetAttrElementsMapIfExists()) {
auto it = map->find(attributeName);
if (it != map->end()) {
ASSERT(it->value.size() == 1);
auto* element = it->value[0].get();
if (element && isDescendantOrShadowDescendantOf(element->rootNode()))
return element;
return nullptr;
}
}
auto id = getAttribute(attributeName);
if (id.isNull())
return nullptr;
return treeScope().getElementById(id);
}
void Element::setElementAttribute(const QualifiedName& attributeName, Element* element)
{
ASSERT(document().settings().ariaReflectionForElementReferencesEnabled());
ASSERT(isElementReflectionAttribute(attributeName));
if (!element) {
if (auto* map = explicitlySetAttrElementsMapIfExists())
map->remove(attributeName);
removeAttribute(attributeName);
return;
}
auto id = element->getIdAttribute();
if (!id.isNull() && &rootNode() == &element->rootNode() && treeScope().getElementById(id) == element)
setAttribute(attributeName, id);
else
setAttribute(attributeName, emptyAtom());
explicitlySetAttrElementsMap().set(attributeName, Vector<WeakPtr<Element>> { element });
}
std::optional<Vector<RefPtr<Element>>> Element::getElementsArrayAttribute(const QualifiedName& attributeName) const
{
ASSERT(document().settings().ariaReflectionForElementReferencesEnabled());
ASSERT(isElementsArrayReflectionAttribute(attributeName));
if (auto* map = explicitlySetAttrElementsMapIfExists()) {
if (auto it = map->find(attributeName); it != map->end()) {
return compactMap(it->value, [&](auto& element) -> std::optional<RefPtr<Element>> {
if (element && isDescendantOrShadowDescendantOf(element->rootNode()))
return element.get();
return std::nullopt;
});
}
}
auto attr = attributeName;
if (attr == HTMLNames::aria_labelledbyAttr && !hasAttribute(HTMLNames::aria_labelledbyAttr) && hasAttribute(HTMLNames::aria_labeledbyAttr))
attr = HTMLNames::aria_labeledbyAttr;
if (!hasAttribute(attr))
return std::nullopt;
SpaceSplitString ids(getAttribute(attr), SpaceSplitString::ShouldFoldCase::No);
Vector<RefPtr<Element>> elements;
for (unsigned i = 0; i < ids.size(); ++i) {
if (auto* element = treeScope().getElementById(ids[i]))
elements.append(element);
}
return elements;
}
void Element::setElementsArrayAttribute(const QualifiedName& attributeName, std::optional<Vector<RefPtr<Element>>>&& elements)
{
ASSERT(document().settings().ariaReflectionForElementReferencesEnabled());
ASSERT(isElementsArrayReflectionAttribute(attributeName));
if (!elements) {
if (auto* map = explicitlySetAttrElementsMapIfExists())
map->remove(attributeName);
removeAttribute(attributeName);
return;
}
Vector<WeakPtr<Element>> newElements;
newElements.reserveInitialCapacity(elements->size());
StringBuilder value;
for (auto element : elements.value()) {
newElements.uncheckedAppend(element);
if (value.isEmpty() && newElements.size() > 1)
continue;
auto id = element->getIdAttribute();
if (!id.isNull() && &rootNode() == &element->rootNode() && treeScope().getElementById(id) == element) {
if (!value.isEmpty())
value.append(' ');
value.append(id);
} else
value.clear();
}
setAttribute(attributeName, value.toAtomString());
explicitlySetAttrElementsMap().set(attributeName, WTFMove(newElements));
}
template <typename CharacterType>
static inline bool isNonEmptyTokenList(const CharacterType* characters, unsigned length)
{
ASSERT(length > 0);
unsigned i = 0;
do {
if (isNotHTMLSpace(characters[i]))
break;
++i;
} while (i < length);
return i < length;
}
static inline bool isNonEmptyTokenList(const AtomString& stringValue)
{
unsigned length = stringValue.length();
if (!length)
return false;
if (stringValue.is8Bit())
return isNonEmptyTokenList(stringValue.characters8(), length);
return isNonEmptyTokenList(stringValue.characters16(), length);
}
void Element::classAttributeChanged(const AtomString& newClassString)
{
// Note: We'll need ElementData, but it doesn't have to be UniqueElementData.
if (!elementData())
ensureUniqueElementData();
auto shouldFoldCase = document().inQuirksMode() ? SpaceSplitString::ShouldFoldCase::Yes : SpaceSplitString::ShouldFoldCase::No;
bool newStringHasClasses = isNonEmptyTokenList(newClassString);
auto oldClassNames = elementData()->classNames();
auto newClassNames = newStringHasClasses ? SpaceSplitString(newClassString, shouldFoldCase) : SpaceSplitString();
{
Style::ClassChangeInvalidation styleInvalidation(*this, oldClassNames, newClassNames);
elementData()->setClassNames(WTFMove(newClassNames));
}
if (hasRareData()) {
if (auto* classList = elementRareData()->classList())
classList->associatedAttributeValueChanged(newClassString);
}
}
void Element::partAttributeChanged(const AtomString& newValue)
{
bool hasParts = isNonEmptyTokenList(newValue);
if (hasParts || !partNames().isEmpty()) {
auto newParts = hasParts ? SpaceSplitString(newValue, SpaceSplitString::ShouldFoldCase::No) : SpaceSplitString();
ensureElementRareData().setPartNames(WTFMove(newParts));
}
if (hasRareData()) {
if (auto* partList = elementRareData()->partList())
partList->associatedAttributeValueChanged(newValue);
}
if (needsStyleInvalidation() && isInShadowTree())
invalidateStyleInternal();
}
URL Element::absoluteLinkURL() const
{
if (!isLink())
return URL();
AtomString linkAttribute;
if (hasTagName(SVGNames::aTag))
linkAttribute = getAttribute(SVGNames::hrefAttr, XLinkNames::hrefAttr);
else
linkAttribute = getAttribute(HTMLNames::hrefAttr);
if (linkAttribute.isEmpty())
return URL();
return document().completeURL(stripLeadingAndTrailingHTMLSpaces(linkAttribute));
}
#if ENABLE(TOUCH_EVENTS)
bool Element::allowsDoubleTapGesture() const
{
if (renderStyle() && renderStyle()->touchActions() != TouchAction::Auto)
return false;
Element* parent = parentElement();
return !parent || parent->allowsDoubleTapGesture();
}
#endif
Style::Resolver& Element::styleResolver()
{
if (auto* shadowRoot = containingShadowRoot())
return shadowRoot->styleScope().resolver();
return document().styleScope().resolver();
}
Style::ElementStyle Element::resolveStyle(const Style::ResolutionContext& resolutionContext)
{
return styleResolver().styleForElement(*this, resolutionContext);
}
void invalidateForSiblingCombinators(Element* sibling)
{
for (; sibling; sibling = sibling->nextElementSibling()) {
if (sibling->styleIsAffectedByPreviousSibling())
sibling->invalidateStyleInternal();
if (sibling->descendantsAffectedByPreviousSibling()) {
for (auto* siblingChild = sibling->firstElementChild(); siblingChild; siblingChild = siblingChild->nextElementSibling())
siblingChild->invalidateStyleForSubtreeInternal();
}
if (!sibling->affectsNextSiblingElementStyle())
return;
}
}
static void invalidateSiblingsIfNeeded(Element& element)
{
if (!element.affectsNextSiblingElementStyle())
return;
auto* parent = element.parentElement();
if (parent && parent->styleValidity() >= Style::Validity::SubtreeInvalid)
return;
invalidateForSiblingCombinators(element.nextElementSibling());
}
void Element::invalidateStyle()
{
Node::invalidateStyle(Style::Validity::ElementInvalid);
invalidateSiblingsIfNeeded(*this);
}
void Element::invalidateStyleAndLayerComposition()
{
Node::invalidateStyle(Style::Validity::ElementInvalid, Style::InvalidationMode::RecompositeLayer);
invalidateSiblingsIfNeeded(*this);
}
void Element::invalidateStyleForSubtree()
{
Node::invalidateStyle(Style::Validity::SubtreeInvalid);
invalidateSiblingsIfNeeded(*this);
}
void Element::invalidateStyleAndRenderersForSubtree()
{
Node::invalidateStyle(Style::Validity::SubtreeAndRenderersInvalid);
invalidateSiblingsIfNeeded(*this);
}
void Element::invalidateStyleInternal()
{
Node::invalidateStyle(Style::Validity::ElementInvalid);
}
void Element::invalidateStyleForSubtreeInternal()
{
Node::invalidateStyle(Style::Validity::SubtreeInvalid);
}
void Element::invalidateForQueryContainerSizeChange()
{
// FIXME: Ideally we would just recompute things that are actually affected by containers queries within the subtree.
Node::invalidateStyle(Style::Validity::SubtreeInvalid);
setNodeFlag(NodeFlag::NeedsUpdateQueryContainerDependentStyle);
}
bool Element::needsUpdateQueryContainerDependentStyle() const
{
return hasNodeFlag(NodeFlag::NeedsUpdateQueryContainerDependentStyle);
}
void Element::clearNeedsUpdateQueryContainerDependentStyle()
{
clearNodeFlag(NodeFlag::NeedsUpdateQueryContainerDependentStyle);
}
void Element::invalidateEventListenerRegions()
{
// Event listener region is updated via style update.
invalidateStyleInternal();
}
bool Element::hasDisplayContents() const
{
if (!hasRareData())
return false;
const RenderStyle* style = elementRareData()->computedStyle();
return style && style->display() == DisplayType::Contents;
}
void Element::storeDisplayContentsStyle(std::unique_ptr<RenderStyle> style)
{
ASSERT(style && style->display() == DisplayType::Contents);
ASSERT(!renderer() || isPseudoElement());
ensureElementRareData().setComputedStyle(WTFMove(style));
clearNodeFlag(NodeFlag::IsComputedStyleInvalidFlag);
}
// Returns true is the given attribute is an event handler.
// We consider an event handler any attribute that begins with "on".
// It is a simple solution that has the advantage of not requiring any
// code or configuration change if a new event handler is defined.
bool Element::isEventHandlerAttribute(const Attribute& attribute) const
{
return attribute.name().namespaceURI().isNull() && attribute.name().localName().startsWith("on"_s);
}
bool Element::isJavaScriptURLAttribute(const Attribute& attribute) const
{
return isURLAttribute(attribute) && WTF::protocolIsJavaScript(stripLeadingAndTrailingHTMLSpaces(attribute.value()));
}
void Element::stripScriptingAttributes(Vector<Attribute>& attributeVector) const
{
attributeVector.removeAllMatching([this](auto& attribute) -> bool {
return this->isEventHandlerAttribute(attribute)
|| this->isJavaScriptURLAttribute(attribute)
|| this->isHTMLContentAttribute(attribute);
});
}
void Element::parserSetAttributes(const Vector<Attribute>& attributeVector)
{
ASSERT(!isConnected());
ASSERT(!parentNode());
ASSERT(!m_elementData);
if (!attributeVector.isEmpty()) {
if (document().sharedObjectPool())
m_elementData = document().sharedObjectPool()->cachedShareableElementDataWithAttributes(attributeVector);
else
m_elementData = ShareableElementData::createWithAttributes(attributeVector);
}
parserDidSetAttributes();
// Use attributeVector instead of m_elementData because attributeChanged might modify m_elementData.
for (const auto& attribute : attributeVector)
attributeChanged(attribute.name(), nullAtom(), attribute.value(), ModifiedDirectly);
}
void Element::parserDidSetAttributes()
{
}
void Element::didMoveToNewDocument(Document& oldDocument, Document& newDocument)
{
ASSERT_WITH_SECURITY_IMPLICATION(&document() == &newDocument);
if (oldDocument.inQuirksMode() != document().inQuirksMode()) {
// ElementData::m_classNames or ElementData::m_idForStyleResolution need to be updated with the right case.
if (hasID())
attributeChanged(idAttr, nullAtom(), getIdAttribute());
if (hasClass())
attributeChanged(classAttr, nullAtom(), getAttribute(classAttr));
}
if (UNLIKELY(isDefinedCustomElement()))
CustomElementReactionQueue::enqueueAdoptedCallbackIfNeeded(*this, oldDocument, newDocument);
if (auto* observerData = intersectionObserverDataIfExists()) {
for (const auto& observer : observerData->observers) {
if (observer->hasObservationTargets()) {
oldDocument.removeIntersectionObserver(*observer);
newDocument.addIntersectionObserver(*observer);
}
}
}
}
bool Element::hasAttributes() const
{
synchronizeAllAttributes();
return elementData() && elementData()->length();
}
bool Element::hasEquivalentAttributes(const Element& other) const
{
synchronizeAllAttributes();
other.synchronizeAllAttributes();
if (elementData() == other.elementData())
return true;
if (elementData())
return elementData()->isEquivalent(other.elementData());
if (other.elementData())
return other.elementData()->isEquivalent(elementData());
return true;
}
String Element::nodeName() const
{
return m_tagName.toString();
}
String Element::nodeNamePreservingCase() const
{
return m_tagName.toString();
}
ExceptionOr<void> Element::setPrefix(const AtomString& prefix)
{
auto result = checkSetPrefix(prefix);
if (result.hasException())
return result.releaseException();
m_tagName.setPrefix(prefix.isEmpty() ? nullAtom() : prefix);
return { };
}
const AtomString& Element::imageSourceURL() const
{
return attributeWithoutSynchronization(srcAttr);
}
bool Element::rendererIsNeeded(const RenderStyle& style)
{
return rendererIsEverNeeded() && style.display() != DisplayType::None && style.display() != DisplayType::Contents;
}
RenderPtr<RenderElement> Element::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
return RenderElement::createFor(*this, WTFMove(style));
}
Node::InsertedIntoAncestorResult Element::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
{
ContainerNode::insertedIntoAncestor(insertionType, parentOfInsertedTree);
#if ENABLE(FULLSCREEN_API)
if (containsFullScreenElement() && parentElement() && !parentElement()->containsFullScreenElement())
setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(true);
#endif
if (parentNode() == &parentOfInsertedTree) {
if (auto* shadowRoot = parentNode()->shadowRoot())
shadowRoot->hostChildElementDidChange(*this);
}
if (!parentOfInsertedTree.isInTreeScope())
return InsertedIntoAncestorResult::Done;
bool becomeConnected = insertionType.connectedToDocument;
TreeScope* newScope = &parentOfInsertedTree.treeScope();
auto* newDocument = becomeConnected ? dynamicDowncast<HTMLDocument>(newScope->documentScope()) : nullptr;
if (!insertionType.treeScopeChanged)
newScope = nullptr;
const AtomString& idValue = getIdAttribute();
if (!idValue.isNull()) {
if (newScope)
updateIdForTreeScope(*newScope, nullAtom(), idValue);
if (newDocument)
updateIdForDocument(*newDocument, nullAtom(), idValue, AlwaysUpdateHTMLDocumentNamedItemMaps);
}
const AtomString& nameValue = getNameAttribute();
if (!nameValue.isNull()) {
if (newScope)
updateNameForTreeScope(*newScope, nullAtom(), nameValue);
if (newDocument)
updateNameForDocument(*newDocument, nullAtom(), nameValue);
}
if (becomeConnected) {
if (UNLIKELY(isCustomElementUpgradeCandidate())) {
ASSERT(isConnected());
CustomElementReactionQueue::tryToUpgradeElement(*this);
}
if (UNLIKELY(isDefinedCustomElement()))
CustomElementReactionQueue::enqueueConnectedCallbackIfNeeded(*this);
}
if (shouldAutofocus(*this))
document().topDocument().appendAutofocusCandidate(*this);
return InsertedIntoAncestorResult::Done;
}
void Element::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
{
#if ENABLE(FULLSCREEN_API)
if (containsFullScreenElement())
setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(false);
#endif
if (auto* page = document().page()) {
#if ENABLE(POINTER_LOCK)
page->pointerLockController().elementWasRemoved(*this);
#endif
page->pointerCaptureController().elementWasRemoved(*this);
}
setSavedLayerScrollPosition(ScrollPosition());
if (oldParentOfRemovedTree.isInTreeScope()) {
TreeScope* oldScope = &oldParentOfRemovedTree.treeScope();
Document* oldDocument = removalType.disconnectedFromDocument ? &oldScope->documentScope() : nullptr;
auto* oldHTMLDocument = dynamicDowncast<HTMLDocument>(oldDocument);
if (!removalType.treeScopeChanged)
oldScope = nullptr;
const AtomString& idValue = getIdAttribute();
if (!idValue.isNull()) {
if (oldScope)
updateIdForTreeScope(*oldScope, idValue, nullAtom());
if (oldHTMLDocument)
updateIdForDocument(*oldHTMLDocument, idValue, nullAtom(), AlwaysUpdateHTMLDocumentNamedItemMaps);
}
const AtomString& nameValue = getNameAttribute();
if (!nameValue.isNull()) {
if (oldScope)
updateNameForTreeScope(*oldScope, nameValue, nullAtom());
if (oldHTMLDocument)
updateNameForDocument(*oldHTMLDocument, nameValue, nullAtom());
}
if (oldDocument) {
if (oldDocument->cssTarget() == this)
oldDocument->setCSSTarget(nullptr);
}
if (removalType.disconnectedFromDocument && UNLIKELY(isDefinedCustomElement()))
CustomElementReactionQueue::enqueueDisconnectedCallbackIfNeeded(*this);
}
if (!parentNode()) {
if (auto* shadowRoot = oldParentOfRemovedTree.shadowRoot())
shadowRoot->hostChildElementDidChange(*this);
}
clearBeforePseudoElement();
clearAfterPseudoElement();
ContainerNode::removedFromAncestor(removalType, oldParentOfRemovedTree);
if (hasPendingResources())
document().accessSVGExtensions().removeElementFromPendingResources(*this);
Styleable::fromElement(*this).elementWasRemoved();
#if ENABLE(WHEEL_EVENT_LATCHING)
if (RefPtr frame = document().frame(); frame && frame->page()) {
if (auto* scrollLatchingController = frame->page()->scrollLatchingControllerIfExists())
scrollLatchingController->removeLatchingStateForTarget(*this);
}
#endif
if (UNLIKELY(isInTopLayer()))
removeFromTopLayer();
}
void Element::addShadowRoot(Ref<ShadowRoot>&& newShadowRoot)
{
ASSERT(!newShadowRoot->hasChildNodes());
ASSERT(!shadowRoot());
ShadowRoot& shadowRoot = newShadowRoot;
{
WidgetHierarchyUpdatesSuspensionScope suspendWidgetHierarchyUpdates;
ScriptDisallowedScope::InMainThread scriptDisallowedScope;
if (renderer() || hasDisplayContents())
RenderTreeUpdater::tearDownRenderers(*this);
ensureElementRareData().setShadowRoot(WTFMove(newShadowRoot));
shadowRoot.setHost(*this);
shadowRoot.setParentTreeScope(treeScope());
NodeVector postInsertionNotificationTargets;
notifyChildNodeInserted(*this, shadowRoot, postInsertionNotificationTargets);
ASSERT_UNUSED(postInsertionNotificationTargets, postInsertionNotificationTargets.isEmpty());
InspectorInstrumentation::didPushShadowRoot(*this, shadowRoot);
invalidateStyleAndRenderersForSubtree();
}
if (shadowRoot.mode() == ShadowRootMode::UserAgent)
didAddUserAgentShadowRoot(shadowRoot);
}
void Element::removeShadowRoot()
{
RefPtr<ShadowRoot> oldRoot = shadowRoot();
if (!oldRoot)
return;
InspectorInstrumentation::willPopShadowRoot(*this, *oldRoot);
document().adjustFocusedNodeOnNodeRemoval(*oldRoot);
ASSERT(!oldRoot->renderer());
elementRareData()->clearShadowRoot();
oldRoot->setHost(nullptr);
oldRoot->setParentTreeScope(document());
}
static bool canAttachAuthorShadowRoot(const Element& element)
{
static NeverDestroyed tagNames = [] {
static constexpr std::array tagList {
&articleTag,
&asideTag,
&blockquoteTag,
&bodyTag,
&divTag,
&footerTag,
&h1Tag,
&h2Tag,
&h3Tag,
&h4Tag,
&h5Tag,
&h6Tag,
&headerTag,
&mainTag,
&navTag,
&pTag,
&sectionTag,
&spanTag
};
MemoryCompactLookupOnlyRobinHoodHashSet<AtomString> set;
set.reserveInitialCapacity(sizeof(tagList));
for (auto& name : tagList)
set.add(name->get().localName());
return set;
}();
if (!is<HTMLElement>(element))
return false;
const auto& localName = element.localName();
if (tagNames.get().contains(localName))
return true;
if (Document::validateCustomElementName(localName) == CustomElementNameValidationStatus::Valid) {
if (auto* window = element.document().domWindow()) {
auto* registry = window->customElementRegistry();
if (registry && registry->isShadowDisabled(localName))
return false;
}
return true;
}
return false;
}
ExceptionOr<ShadowRoot&> Element::attachShadow(const ShadowRootInit& init)
{
if (!canAttachAuthorShadowRoot(*this))
return Exception { NotSupportedError };
if (shadowRoot())
return Exception { NotSupportedError };
if (init.mode == ShadowRootMode::UserAgent)
return Exception { TypeError };
auto shadow = ShadowRoot::create(document(), init.mode, init.delegatesFocus ? ShadowRoot::DelegatesFocus::Yes : ShadowRoot::DelegatesFocus::No);
auto& result = shadow.get();
addShadowRoot(WTFMove(shadow));
return result;
}
ShadowRoot* Element::shadowRootForBindings(JSC::JSGlobalObject& lexicalGlobalObject) const
{
auto* shadow = shadowRoot();
if (!shadow)
return nullptr;
if (shadow->mode() == ShadowRootMode::Open)
return shadow;
if (JSC::jsCast<JSDOMGlobalObject*>(&lexicalGlobalObject)->world().shadowRootIsAlwaysOpen())
return shadow;
return nullptr;
}
RefPtr<ShadowRoot> Element::userAgentShadowRoot() const
{
ASSERT(!shadowRoot() || shadowRoot()->mode() == ShadowRootMode::UserAgent);
return shadowRoot();
}
ShadowRoot& Element::ensureUserAgentShadowRoot()
{
if (auto shadow = userAgentShadowRoot())
return *shadow;
return createUserAgentShadowRoot();
}
ShadowRoot& Element::createUserAgentShadowRoot()
{
ASSERT(!userAgentShadowRoot());
auto newShadow = ShadowRoot::create(document(), ShadowRootMode::UserAgent);
ShadowRoot& shadow = newShadow;
addShadowRoot(WTFMove(newShadow));
return shadow;
}
inline void Node::setCustomElementState(CustomElementState state)
{
auto bitfields = rareDataBitfields();
bitfields.customElementState = static_cast<uint16_t>(state);
setRareDataBitfields(bitfields);
}
void Element::setIsDefinedCustomElement(JSCustomElementInterface& elementInterface)
{
setCustomElementState(CustomElementState::Custom);
auto& data = ensureElementRareData();
if (!data.customElementReactionQueue())
data.setCustomElementReactionQueue(makeUnique<CustomElementReactionQueue>(elementInterface));
invalidateStyleForSubtree();
InspectorInstrumentation::didChangeCustomElementState(*this);
}
void Element::setIsFailedCustomElement()
{
setIsFailedCustomElementWithoutClearingReactionQueue();
clearReactionQueueFromFailedCustomElement();
}
void Element::setIsFailedCustomElementWithoutClearingReactionQueue()
{
ASSERT(isUndefinedCustomElement());
ASSERT(customElementState() == CustomElementState::Undefined);
setCustomElementState(CustomElementState::Failed);
InspectorInstrumentation::didChangeCustomElementState(*this);
}
void Element::clearReactionQueueFromFailedCustomElement()
{
ASSERT(isFailedCustomElement());
if (hasRareData()) {
// Clear the queue instead of deleting it since this function can be called inside CustomElementReactionQueue::invokeAll during upgrades.
if (auto* queue = elementRareData()->customElementReactionQueue())
queue->clear();
}
}
void Element::setIsCustomElementUpgradeCandidate()
{
ASSERT(customElementState() == CustomElementState::Uncustomized);
setCustomElementState(CustomElementState::Undefined);
InspectorInstrumentation::didChangeCustomElementState(*this);
}
void Element::enqueueToUpgrade(JSCustomElementInterface& elementInterface)
{
ASSERT(isCustomElementUpgradeCandidate());
ASSERT(!isDefinedCustomElement() && !isFailedCustomElement());
auto& data = ensureElementRareData();
bool alreadyScheduledToUpgrade = data.customElementReactionQueue();
if (!alreadyScheduledToUpgrade)
data.setCustomElementReactionQueue(makeUnique<CustomElementReactionQueue>(elementInterface));
data.customElementReactionQueue()->enqueueElementUpgrade(*this, alreadyScheduledToUpgrade);
}
CustomElementReactionQueue* Element::reactionQueue() const
{
#if ASSERT_ENABLED
if (isFailedCustomElement()) {
auto* queue = elementRareData()->customElementReactionQueue();
ASSERT(queue);
ASSERT(queue->isEmpty() || queue->hasJustUpgradeReaction());
} else
ASSERT(isDefinedCustomElement() || isCustomElementUpgradeCandidate());
#endif
if (!hasRareData())
return nullptr;
return elementRareData()->customElementReactionQueue();
}
const AtomString& Element::shadowPseudoId() const
{
return pseudo();
}
bool Element::childTypeAllowed(NodeType type) const
{
switch (type) {
case ELEMENT_NODE:
case TEXT_NODE:
case COMMENT_NODE:
case PROCESSING_INSTRUCTION_NODE:
case CDATA_SECTION_NODE:
return true;
default:
break;
}
return false;
}
void Element::childrenChanged(const ChildChange& change)
{
ContainerNode::childrenChanged(change);
if (auto* shadowRoot = this->shadowRoot()) {
switch (change.type) {
case ChildChange::Type::ElementInserted:
case ChildChange::Type::ElementRemoved:
// For elements, we notify shadowRoot in Element::insertedIntoAncestor and Element::removedFromAncestor.
break;
case ChildChange::Type::AllChildrenRemoved:
case ChildChange::Type::AllChildrenReplaced:
shadowRoot->didRemoveAllChildrenOfShadowHost();
break;
case ChildChange::Type::TextInserted:
case ChildChange::Type::TextRemoved:
case ChildChange::Type::TextChanged:
shadowRoot->didChangeDefaultSlot();
break;
case ChildChange::Type::NonContentsChildInserted:
case ChildChange::Type::NonContentsChildRemoved:
break;
}
}
}
void Element::setAttributeEventListener(const AtomString& eventType, const QualifiedName& attributeName, const AtomString& attributeValue)
{
setAttributeEventListener(eventType, JSLazyEventListener::create(*this, attributeName, attributeValue), mainThreadNormalWorld());
}
void Element::removeAllEventListeners()
{
ContainerNode::removeAllEventListeners();
if (ShadowRoot* shadowRoot = this->shadowRoot())
shadowRoot->removeAllEventListeners();
}
void Element::beginParsingChildren()
{
clearIsParsingChildrenFinished();
}
void Element::finishParsingChildren()
{
ContainerNode::finishParsingChildren();
setIsParsingChildrenFinished();
Style::ChildChangeInvalidation::invalidateAfterFinishedParsingChildren(*this);
}
static void appendAttributes(StringBuilder& builder, const Element& element)
{
if (element.hasID())
builder.append(" id=\'", element.getIdAttribute(), '\'');
if (element.hasClass()) {
builder.append(" class=\'");
size_t classNamesToDump = element.classNames().size();
constexpr size_t maxNumClassNames = 7;
bool addEllipsis = false;
if (classNamesToDump > maxNumClassNames) {
classNamesToDump = maxNumClassNames;
addEllipsis = true;
}
for (size_t i = 0; i < classNamesToDump; ++i) {
if (i > 0)
builder.append(' ');
builder.append(element.classNames()[i]);
}
if (addEllipsis)
builder.append(" ...");
builder.append('\'');
}
}
String Element::description() const
{
StringBuilder builder;
builder.append(ContainerNode::description());
appendAttributes(builder, *this);
return builder.toString();
}
String Element::debugDescription() const
{
StringBuilder builder;
builder.append(ContainerNode::debugDescription());
appendAttributes(builder, *this);
return builder.toString();
}
const Vector<RefPtr<Attr>>& Element::attrNodeList()
{
ASSERT(hasSyntheticAttrChildNodes());
return *attrNodeListForElement(*this);
}
void Element::attachAttributeNodeIfNeeded(Attr& attrNode)
{
ASSERT(!attrNode.ownerElement() || attrNode.ownerElement() == this);
if (attrNode.ownerElement() == this)
return;
ScriptDisallowedScope::InMainThread scriptDisallowedScope;
attrNode.attachToElement(*this);
ensureAttrNodeListForElement(*this).append(&attrNode);
}
ExceptionOr<RefPtr<Attr>> Element::setAttributeNode(Attr& attrNode)
{
RefPtr<Attr> oldAttrNode = attrIfExists(attrNode.localName(), shouldIgnoreAttributeCase(*this));
if (oldAttrNode.get() == &attrNode)
return oldAttrNode;
// InUseAttributeError: Raised if node is an Attr that is already an attribute of another Element object.
// The DOM user must explicitly clone Attr nodes to re-use them in other elements.
if (attrNode.ownerElement() && attrNode.ownerElement() != this)
return Exception { InUseAttributeError };
{
ScriptDisallowedScope::InMainThread scriptDisallowedScope;
synchronizeAllAttributes();
}
auto& elementData = ensureUniqueElementData();
auto existingAttributeIndex = elementData.findAttributeIndexByName(attrNode.localName(), shouldIgnoreAttributeCase(*this));
// Attr::value() will return its 'm_standaloneValue' member any time its Element is set to nullptr. We need to cache this value
// before making changes to attrNode's Element connections.
auto attrNodeValue = attrNode.value();
if (existingAttributeIndex == ElementData::attributeNotFound) {
attachAttributeNodeIfNeeded(attrNode);
setAttributeInternal(elementData.findAttributeIndexByName(attrNode.qualifiedName()), attrNode.qualifiedName(), attrNodeValue, NotInSynchronizationOfLazyAttribute);
} else {
const Attribute& attribute = attributeAt(existingAttributeIndex);
if (oldAttrNode)
detachAttrNodeFromElementWithValue(oldAttrNode.get(), attribute.value());
else
oldAttrNode = Attr::create(document(), attrNode.qualifiedName(), attribute.value());
attachAttributeNodeIfNeeded(attrNode);
if (attribute.name().matches(attrNode.qualifiedName()))
setAttributeInternal(existingAttributeIndex, attrNode.qualifiedName(), attrNodeValue, NotInSynchronizationOfLazyAttribute);
else {
removeAttributeInternal(existingAttributeIndex, NotInSynchronizationOfLazyAttribute);
setAttributeInternal(ensureUniqueElementData().findAttributeIndexByName(attrNode.qualifiedName()), attrNode.qualifiedName(), attrNodeValue, NotInSynchronizationOfLazyAttribute);
}
}
return oldAttrNode;
}
ExceptionOr<RefPtr<Attr>> Element::setAttributeNodeNS(Attr& attrNode)
{
RefPtr<Attr> oldAttrNode = attrIfExists(attrNode.qualifiedName());
if (oldAttrNode.get() == &attrNode)
return oldAttrNode;
// InUseAttributeError: Raised if node is an Attr that is already an attribute of another Element object.
// The DOM user must explicitly clone Attr nodes to re-use them in other elements.
if (attrNode.ownerElement() && attrNode.ownerElement() != this)
return Exception { InUseAttributeError };
// Attr::value() will return its 'm_standaloneValue' member any time its Element is set to nullptr. We need to cache this value
// before making changes to attrNode's Element connections.
auto attrNodeValue = attrNode.value();
unsigned index = 0;
{
ScriptDisallowedScope::InMainThread scriptDisallowedScope;
synchronizeAllAttributes();
auto& elementData = ensureUniqueElementData();
index = elementData.findAttributeIndexByName(attrNode.qualifiedName());
if (index != ElementData::attributeNotFound) {
if (oldAttrNode)
detachAttrNodeFromElementWithValue(oldAttrNode.get(), elementData.attributeAt(index).value());
else
oldAttrNode = Attr::create(document(), attrNode.qualifiedName(), elementData.attributeAt(index).value());
}
}
attachAttributeNodeIfNeeded(attrNode);
setAttributeInternal(index, attrNode.qualifiedName(), attrNodeValue, NotInSynchronizationOfLazyAttribute);
return oldAttrNode;
}
ExceptionOr<Ref<Attr>> Element::removeAttributeNode(Attr& attr)
{
if (attr.ownerElement() != this)
return Exception { NotFoundError };
ASSERT(&document() == &attr.document());
synchronizeAllAttributes();
if (!m_elementData)
return Exception { NotFoundError };
auto existingAttributeIndex = m_elementData->findAttributeIndexByName(attr.qualifiedName());
if (existingAttributeIndex == ElementData::attributeNotFound)
return Exception { NotFoundError };
Ref<Attr> oldAttrNode { attr };
detachAttrNodeFromElementWithValue(&attr, m_elementData->attributeAt(existingAttributeIndex).value());
removeAttributeInternal(existingAttributeIndex, NotInSynchronizationOfLazyAttribute);
return oldAttrNode;
}
ExceptionOr<QualifiedName> Element::parseAttributeName(const AtomString& namespaceURI, const AtomString& qualifiedName)
{
auto parseResult = Document::parseQualifiedName(namespaceURI, qualifiedName);
if (parseResult.hasException())
return parseResult.releaseException();
QualifiedName parsedAttributeName { parseResult.releaseReturnValue() };
if (!Document::hasValidNamespaceForAttributes(parsedAttributeName))
return Exception { NamespaceError };
return parsedAttributeName;
}
ExceptionOr<void> Element::setAttributeNS(const AtomString& namespaceURI, const AtomString& qualifiedName, const AtomString& value)
{
auto result = parseAttributeName(namespaceURI, qualifiedName);
if (result.hasException())
return result.releaseException();
setAttribute(result.releaseReturnValue(), value);
return { };
}
void Element::removeAttributeInternal(unsigned index, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
{
ASSERT_WITH_SECURITY_IMPLICATION(index < attributeCount());
UniqueElementData& elementData = ensureUniqueElementData();
QualifiedName name = elementData.attributeAt(index).name();
AtomString valueBeingRemoved = elementData.attributeAt(index).value();
if (RefPtr<Attr> attrNode = attrIfExists(name))
detachAttrNodeFromElementWithValue(attrNode.get(), elementData.attributeAt(index).value());
if (inSynchronizationOfLazyAttribute) {
elementData.removeAttribute(index);
return;
}
ASSERT(!valueBeingRemoved.isNull());
willModifyAttribute(name, valueBeingRemoved, nullAtom());
{
Style::AttributeChangeInvalidation styleInvalidation(*this, name, valueBeingRemoved, nullAtom());
elementData.removeAttribute(index);
}
didRemoveAttribute(name, valueBeingRemoved);
}
void Element::addAttributeInternal(const QualifiedName& name, const AtomString& value, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
{
if (inSynchronizationOfLazyAttribute) {
ensureUniqueElementData().addAttribute(name, value);
return;
}
willModifyAttribute(name, nullAtom(), value);
{
Style::AttributeChangeInvalidation styleInvalidation(*this, name, nullAtom(), value);
ensureUniqueElementData().addAttribute(name, value);
}
didAddAttribute(name, value);
}
bool Element::removeAttribute(const AtomString& qualifiedName)
{
if (!elementData())
return false;
AtomString caseAdjustedQualifiedName = shouldIgnoreAttributeCase(*this) ? qualifiedName.convertToASCIILowercase() : qualifiedName;
unsigned index = elementData()->findAttributeIndexByName(caseAdjustedQualifiedName, false);
if (index == ElementData::attributeNotFound) {
if (UNLIKELY(caseAdjustedQualifiedName == styleAttr) && elementData()->styleAttributeIsDirty() && is<StyledElement>(*this))
downcast<StyledElement>(*this).removeAllInlineStyleProperties();
return false;
}
removeAttributeInternal(index, NotInSynchronizationOfLazyAttribute);
return true;
}
bool Element::removeAttributeNS(const AtomString& namespaceURI, const AtomString& localName)
{
return removeAttribute(QualifiedName(nullAtom(), localName, namespaceURI));
}
RefPtr<Attr> Element::getAttributeNode(const AtomString& qualifiedName)
{
if (!elementData())
return nullptr;
synchronizeAttribute(qualifiedName);
const Attribute* attribute = elementData()->findAttributeByName(qualifiedName, shouldIgnoreAttributeCase(*this));
if (!attribute)
return nullptr;
return ensureAttr(attribute->name());
}
RefPtr<Attr> Element::getAttributeNodeNS(const AtomString& namespaceURI, const AtomString& localName)
{
if (!elementData())
return nullptr;
QualifiedName qName(nullAtom(), localName, namespaceURI);
synchronizeAttribute(qName);
const Attribute* attribute = elementData()->findAttributeByName(qName);
if (!attribute)
return nullptr;
return ensureAttr(attribute->name());
}
bool Element::hasAttribute(const AtomString& qualifiedName) const
{
if (!elementData())
return false;
synchronizeAttribute(qualifiedName);
return elementData()->findAttributeByName(qualifiedName, shouldIgnoreAttributeCase(*this));
}
bool Element::hasAttributeNS(const AtomString& namespaceURI, const AtomString& localName) const
{
if (!elementData())
return false;
QualifiedName qName(nullAtom(), localName, namespaceURI);
synchronizeAttribute(qName);
return elementData()->findAttributeByName(qName);
}
static RefPtr<ShadowRoot> shadowRootWithDelegatesFocus(const Element& element)
{
if (auto* root = element.shadowRoot()) {
if (root->delegatesFocus())
return root;
}
return nullptr;
}
static bool isProgramaticallyFocusable(Element& element)
{
ScriptDisallowedScope::InMainThread scriptDisallowedScope;
if (shadowRootWithDelegatesFocus(element))
return false;
// If the stylesheets have already been loaded we can reliably check isFocusable.
// If not, we continue and set the focused node on the focus controller below so that it can be updated soon after attach.
if (element.document().haveStylesheetsLoaded()) {
if (!element.isFocusable())
return false;
}
return element.supportsFocus();
}
static RefPtr<Element> findFirstProgramaticallyFocusableElementInComposedTree(Element& host)
{
ASSERT(host.shadowRoot());
for (auto& node : composedTreeDescendants(host)) {
if (!is<Element>(node))
continue;
auto& element = downcast<Element>(node);
if (isProgramaticallyFocusable(element))
return &element;
}
return nullptr;
}
void Element::focus(const FocusOptions& options)
{
if (!isConnected())
return;
Ref document { this->document() };
if (document->focusedElement() == this) {
if (document->page())
document->page()->chrome().client().elementDidRefocus(*this, options);
return;
}
RefPtr<Element> newTarget = this;
// If we don't have renderer yet, isFocusable will compute it without style update.
// FIXME: Expand it to avoid style update in all cases.
if (renderer() && document->haveStylesheetsLoaded())
document->updateStyleIfNeeded();
if (&newTarget->document() != document.ptr())
return;
if (auto root = shadowRootWithDelegatesFocus(*this)) {
RefPtr currentlyFocusedElement = document->focusedElement();
if (root->containsIncludingShadowDOM(currentlyFocusedElement.get())) {
if (document->page())
document->page()->chrome().client().elementDidRefocus(*currentlyFocusedElement, options);
return;
}
newTarget = findFirstProgramaticallyFocusableElementInComposedTree(*this);
if (!newTarget)
return;
} else if (!isProgramaticallyFocusable(*newTarget))
return;
if (Page* page = document->page()) {
auto& frame = *document->frame();
if (!frame.hasHadUserInteraction() && !frame.isMainFrame() && !document->topOrigin().isSameOriginDomain(document->securityOrigin()))
return;
FocusOptions optionsWithVisibility = options;
if (options.trigger == FocusTrigger::Bindings && document->wasLastFocusByClick())
optionsWithVisibility.visibility = FocusVisibility::Invisible;
else if (options.trigger != FocusTrigger::Click)
optionsWithVisibility.visibility = FocusVisibility::Visible;
// Focus and change event handlers can cause us to lose our last ref.
// If a focus event handler changes the focus to a different node it
// does not make sense to continue and update appearence.
if (!CheckedRef(page->focusController())->setFocusedElement(newTarget.get(), *document->frame(), optionsWithVisibility))
return;
}
newTarget->findTargetAndUpdateFocusAppearance(options.selectionRestorationMode, options.preventScroll ? SelectionRevealMode::DoNotReveal : SelectionRevealMode::Reveal);
}
void Element::focusForBindings(FocusOptions&& options)
{
options.trigger = FocusTrigger::Bindings;
focus(WTFMove(options));
}
void Element::findTargetAndUpdateFocusAppearance(SelectionRestorationMode selectionMode, SelectionRevealMode revealMode)
{
#if PLATFORM(IOS_FAMILY)
// Focusing a form element triggers animation in UIKit to scroll to the right position.
// Calling updateFocusAppearance() would generate an unnecessary call to ScrollView::setScrollPosition(),
// which would jump us around during this animation. See <rdar://problem/6699741>.
if (revealMode == SelectionRevealMode::Reveal && is<HTMLFormControlElement>(*this))
revealMode = SelectionRevealMode::RevealUpToMainFrame;
#endif
auto target = focusAppearanceUpdateTarget();
if (!target)
return;
target->updateFocusAppearance(selectionMode, revealMode);
}
// https://html.spec.whatwg.org/#focus-processing-model
RefPtr<Element> Element::focusAppearanceUpdateTarget()
{
return this;
}
void Element::updateFocusAppearance(SelectionRestorationMode, SelectionRevealMode revealMode)
{
if (isRootEditableElement()) {
// Keep frame alive in this method, since setSelection() may release the last reference to |frame|.
RefPtr<Frame> frame = document().frame();
if (!frame)
return;
// When focusing an editable element in an iframe, don't reset the selection if it already contains a selection.
if (this == frame->selection().selection().rootEditableElement())
return;
// FIXME: We should restore the previous selection if there is one.
VisibleSelection newSelection = VisibleSelection(firstPositionInOrBeforeNode(this));
if (frame->selection().shouldChangeSelection(newSelection)) {
frame->selection().setSelection(newSelection, FrameSelection::defaultSetSelectionOptions(), Element::defaultFocusTextStateChangeIntent());
frame->selection().revealSelection(revealMode);
return;
}
}
if (RefPtr<FrameView> view = document().view())
view->scheduleScrollToFocusedElement(revealMode);
}
void Element::blur()
{
if (treeScope().focusedElementInScope() == this) {
if (RefPtr frame = document().frame())
CheckedRef(frame->page()->focusController())->setFocusedElement(nullptr, *frame);
else
document().setFocusedElement(nullptr);
}
}
void Element::runFocusingStepsForAutofocus()
{
focus();
}
void Element::dispatchFocusInEventIfNeeded(RefPtr<Element>&& oldFocusedElement)
{
if (!document().hasListenerType(Document::FOCUSIN_LISTENER))
return;
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(ScriptDisallowedScope::InMainThread::isScriptAllowed() || !isInWebProcess());
dispatchScopedEvent(FocusEvent::create(eventNames().focusinEvent, Event::CanBubble::Yes, Event::IsCancelable::No, document().windowProxy(), 0, WTFMove(oldFocusedElement)));
}
void Element::dispatchFocusOutEventIfNeeded(RefPtr<Element>&& newFocusedElement)
{
if (!document().hasListenerType(Document::FOCUSOUT_LISTENER))
return;
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(ScriptDisallowedScope::InMainThread::isScriptAllowed() || !isInWebProcess());
dispatchScopedEvent(FocusEvent::create(eventNames().focusoutEvent, Event::CanBubble::Yes, Event::IsCancelable::No, document().windowProxy(), 0, WTFMove(newFocusedElement)));
}
void Element::dispatchFocusEvent(RefPtr<Element>&& oldFocusedElement, const FocusOptions& options)
{
if (auto* page = document().page())
page->chrome().client().elementDidFocus(*this, options);
dispatchEvent(FocusEvent::create(eventNames().focusEvent, Event::CanBubble::No, Event::IsCancelable::No, document().windowProxy(), 0, WTFMove(oldFocusedElement)));
}
void Element::dispatchBlurEvent(RefPtr<Element>&& newFocusedElement)
{
if (auto* page = document().page())
page->chrome().client().elementDidBlur(*this);
dispatchEvent(FocusEvent::create(eventNames().blurEvent, Event::CanBubble::No, Event::IsCancelable::No, document().windowProxy(), 0, WTFMove(newFocusedElement)));
}
void Element::dispatchWebKitImageReadyEventForTesting()
{
if (document().settings().webkitImageReadyEventEnabled())
dispatchEvent(Event::create("webkitImageFrameReady"_s, Event::CanBubble::Yes, Event::IsCancelable::Yes));
}
bool Element::dispatchMouseForceWillBegin()
{
#if ENABLE(MOUSE_FORCE_EVENTS)
if (!document().hasListenerType(Document::FORCEWILLBEGIN_LISTENER))
return false;
Frame* frame = document().frame();
if (!frame)
return false;
PlatformMouseEvent platformMouseEvent { frame->eventHandler().lastKnownMousePosition(), frame->eventHandler().lastKnownMouseGlobalPosition(), NoButton, PlatformEvent::NoType, 1, false, false, false, false, WallTime::now(), ForceAtClick, NoTap };
auto mouseForceWillBeginEvent = MouseEvent::create(eventNames().webkitmouseforcewillbeginEvent, document().windowProxy(), platformMouseEvent, 0, nullptr);
mouseForceWillBeginEvent->setTarget(this);
dispatchEvent(mouseForceWillBeginEvent);
if (mouseForceWillBeginEvent->defaultHandled() || mouseForceWillBeginEvent->defaultPrevented())
return true;
#endif
return false;
}
void Element::enqueueSecurityPolicyViolationEvent(SecurityPolicyViolationEventInit&& eventInit)
{
document().eventLoop().queueTask(TaskSource::DOMManipulation, [this, protectedThis = Ref { *this }, event = SecurityPolicyViolationEvent::create(eventNames().securitypolicyviolationEvent, WTFMove(eventInit), Event::IsTrusted::Yes)] {
if (!isConnected())
document().dispatchEvent(event);
else
dispatchEvent(event);
});
}
ExceptionOr<void> Element::mergeWithNextTextNode(Text& node)
{
auto* next = node.nextSibling();
if (!is<Text>(next))
return { };
Ref<Text> textNext { downcast<Text>(*next) };
node.appendData(textNext->data());
return textNext->remove();
}
String Element::innerHTML() const
{
return serializeFragment(*this, SerializedNodes::SubtreesOfChildren);
}
String Element::outerHTML() const
{
return serializeFragment(*this, SerializedNodes::SubtreeIncludingNode);
}
ExceptionOr<void> Element::setOuterHTML(const String& html)
{
// The specification allows setting outerHTML on an Element whose parent is a DocumentFragment and Gecko supports this.
// However, as of June 2021, Blink matches our behavior and throws a NoModificationAllowedError for non-Element parents.
RefPtr parent = parentElement();
if (UNLIKELY(!parent)) {
if (!parentNode())
return Exception { NoModificationAllowedError, "Cannot set outerHTML on element because it doesn't have a parent"_s };
return Exception { NoModificationAllowedError, "Cannot set outerHTML on element because its parent is not an Element"_s };
}
RefPtr<Node> prev = previousSibling();
RefPtr<Node> next = nextSibling();
auto fragment = createFragmentForInnerOuterHTML(*parent, html, AllowScriptingContent);
if (fragment.hasException())
return fragment.releaseException();
auto replaceResult = parent->replaceChild(fragment.releaseReturnValue().get(), *this);
if (replaceResult.hasException())
return replaceResult.releaseException();
// The following is not part of the specification but matches Blink's behavior as of June 2021.
RefPtr<Node> node = next ? next->previousSibling() : nullptr;
if (is<Text>(node)) {
auto result = mergeWithNextTextNode(downcast<Text>(*node));
if (result.hasException())
return result.releaseException();
}
if (is<Text>(prev)) {
auto result = mergeWithNextTextNode(downcast<Text>(*prev));
if (result.hasException())
return result.releaseException();
}
return { };
}
ExceptionOr<void> Element::setInnerHTML(const String& html)
{
ContainerNode* container;
if (!is<HTMLTemplateElement>(*this))
container = this;
else
container = &downcast<HTMLTemplateElement>(*this).content();
// Parsing empty string creates additional elements only inside <html> container
// https://html.spec.whatwg.org/multipage/parsing.html#parsing-main-inhtml
if (html.isEmpty() && !is<HTMLHtmlElement>(*container)) {
ChildListMutationScope mutation(*container);
container->removeChildren();
return { };
}
auto fragment = createFragmentForInnerOuterHTML(*this, html, AllowScriptingContent);
if (fragment.hasException())
return fragment.releaseException();
return replaceChildrenWithFragment(*container, fragment.releaseReturnValue());
}
String Element::innerText()
{
// We need to update layout, since plainText uses line boxes in the render tree.
document().updateLayoutIgnorePendingStylesheets();
if (!renderer())
return textContent(true);
return plainText(makeRangeSelectingNodeContents(*this));
}
String Element::outerText()
{
// Getting outerText is the same as getting innerText, only
// setting is different. You would think this should get the plain
// text for the outer range, but this is wrong, <br> for instance
// would return different values for inner and outer text by such
// a rule, but it doesn't in WinIE, and we want to match that.
return innerText();
}
String Element::title() const
{
return String();
}
const AtomString& Element::pseudo() const
{
return attributeWithoutSynchronization(pseudoAttr);
}
void Element::setPseudo(const AtomString& value)
{
setAttributeWithoutSynchronization(pseudoAttr, value);
}
void Element::willBecomeFullscreenElement()
{
for (auto& child : descendantsOfType<Element>(*this))
child.ancestorWillEnterFullscreen();
}
static void forEachRenderLayer(Element& element, const std::function<void(RenderLayer&)>& function)
{
auto* renderer = element.renderer();
if (!renderer || !is<RenderLayerModelObject>(renderer))
return;
auto& layerModelObject = downcast<RenderLayerModelObject>(*renderer);
if (!is<RenderBoxModelObject>(layerModelObject)) {
if (layerModelObject.hasLayer())
function(*layerModelObject.layer());
return;
}
RenderBoxModelObject::forRendererAndContinuations(downcast<RenderBoxModelObject>(*renderer), [function](RenderBoxModelObject& renderer) {
if (renderer.hasLayer())
function(*renderer.layer());
});
}
void Element::addToTopLayer()
{
RELEASE_ASSERT(!isInTopLayer());
ScriptDisallowedScope scriptDisallowedScope;
forEachRenderLayer(*this, [](RenderLayer& layer) {
layer.establishesTopLayerWillChange();
});
document().addTopLayerElement(*this);
setNodeFlag(NodeFlag::IsInTopLayer);
// Invalidate inert state
invalidateStyleInternal();
if (document().documentElement())
document().documentElement()->invalidateStyleInternal();
forEachRenderLayer(*this, [](RenderLayer& layer) {
layer.establishesTopLayerDidChange();
});
}
void Element::removeFromTopLayer()
{
RELEASE_ASSERT(isInTopLayer());
ScriptDisallowedScope scriptDisallowedScope;
forEachRenderLayer(*this, [](RenderLayer& layer) {
layer.establishesTopLayerWillChange();
});
// We need to call Styleable::fromRenderer() while this element is still contained in
// Document::topLayerElements(), since Styleable::fromRenderer() relies on this to
// find the backdrop's associated element.
if (auto* renderer = this->renderer()) {
if (auto backdrop = renderer->backdropRenderer()) {
if (auto styleable = Styleable::fromRenderer(*backdrop))
styleable->cancelDeclarativeAnimations();
}
}
document().removeTopLayerElement(*this);
clearNodeFlag(NodeFlag::IsInTopLayer);
// Invalidate inert state
invalidateStyleInternal();
if (document().documentElement())
document().documentElement()->invalidateStyleInternal();
if (auto* modalElement = document().activeModalDialog())
modalElement->invalidateStyleInternal();
forEachRenderLayer(*this, [](RenderLayer& layer) {
layer.establishesTopLayerDidChange();
});
}
static PseudoElement* beforeOrAfterPseudoElement(const Element& host, PseudoId pseudoElementSpecifier)
{
switch (pseudoElementSpecifier) {
case PseudoId::Before:
return host.beforePseudoElement();
case PseudoId::After:
return host.afterPseudoElement();
default:
return nullptr;
}
}
const RenderStyle* Element::existingComputedStyle() const
{
if (hasRareData()) {
if (auto* style = elementRareData()->computedStyle())
return style;
}
return renderStyle();
}
const RenderStyle* Element::renderOrDisplayContentsStyle(PseudoId pseudoId) const
{
if (pseudoId != PseudoId::None) {
if (auto* pseudoElement = beforeOrAfterPseudoElement(*this, pseudoId))
return pseudoElement->renderOrDisplayContentsStyle();
if (auto* computedStyle = existingComputedStyle()) {
if (auto* cachedPseudoStyle = computedStyle->getCachedPseudoStyle(pseudoId))
return cachedPseudoStyle;
}
return nullptr;
}
if (auto* style = renderStyle())
return style;
if (!hasRareData())
return nullptr;
auto* style = elementRareData()->computedStyle();
if (style && style->display() == DisplayType::Contents)
return style;
return nullptr;
}
const RenderStyle* Element::resolveComputedStyle(ResolveComputedStyleMode mode)
{
ASSERT(isConnected());
ASSERT(!existingComputedStyle() || hasNodeFlag(NodeFlag::IsComputedStyleInvalidFlag));
Deque<RefPtr<Element>, 32> elementsRequiringComputedStyle({ this });
const RenderStyle* computedStyle = nullptr;
// Collect ancestors until we find one that has style.
for (auto& ancestor : composedTreeAncestors(*this)) {
if (auto* existingStyle = ancestor.existingComputedStyle()) {
computedStyle = existingStyle;
break;
}
elementsRequiringComputedStyle.prepend(&ancestor);
}
// On iOS request delegates called during styleForElement may result in re-entering WebKit and killing the style resolver.
Style::PostResolutionCallbackDisabler disabler(document(), Style::PostResolutionCallbackDisabler::DrainCallbacks::No);
// Resolve and cache styles starting from the most distant ancestor.
for (auto& element : elementsRequiringComputedStyle) {
auto style = document().styleForElementIgnoringPendingStylesheets(*element, computedStyle);
computedStyle = style.get();
ElementRareData& rareData = element->ensureElementRareData();
rareData.setComputedStyle(WTFMove(style));
element->clearNodeFlag(NodeFlag::IsComputedStyleInvalidFlag);
if (mode == ResolveComputedStyleMode::RenderedOnly && computedStyle->display() == DisplayType::None)
return nullptr;
}
return computedStyle;
}
bool Element::hasValidStyle() const
{
if (!document().needsStyleRecalc())
return true;
if (document().hasPendingFullStyleRebuild())
return false;
for (auto& element : lineageOfType<Element>(*this)) {
if (element.styleValidity() != Style::Validity::Valid)
return false;
}
return true;
}
bool Element::isFocusableWithoutResolvingFullStyle() const
{
auto isFocusableStyle = [](const RenderStyle* style) {
return style
&& style->display() != DisplayType::None
&& style->display() != DisplayType::Contents
&& style->visibility() == Visibility::Visible
&& !style->effectiveInert();
};
if (renderStyle() || hasValidStyle())
return isFocusableStyle(renderStyle());
auto computedStyleForElement = [](Element& element) -> const RenderStyle* {
auto* style = element.hasNodeFlag(NodeFlag::IsComputedStyleInvalidFlag) ? nullptr : element.existingComputedStyle();
return style ? style : element.resolveComputedStyle(ResolveComputedStyleMode::RenderedOnly);
};
// Compute style in yet unstyled subtree.
auto* style = computedStyleForElement(const_cast<Element&>(*this));
if (!isFocusableStyle(style))
return false;
for (auto& element : composedTreeAncestors(const_cast<Element&>(*this))) {
auto* style = computedStyleForElement(element);
if (!style || style->display() == DisplayType::None)
return false;
}
return true;
}
const RenderStyle& Element::resolvePseudoElementStyle(PseudoId pseudoElementSpecifier)
{
ASSERT(!isPseudoElement());
auto* parentStyle = existingComputedStyle();
ASSERT(parentStyle);
ASSERT(!parentStyle->getCachedPseudoStyle(pseudoElementSpecifier));
Style::PostResolutionCallbackDisabler disabler(document(), Style::PostResolutionCallbackDisabler::DrainCallbacks::No);
auto style = document().styleForElementIgnoringPendingStylesheets(*this, parentStyle, pseudoElementSpecifier);
if (!style) {
style = RenderStyle::createPtr();
style->inheritFrom(*parentStyle);
style->setStyleType(pseudoElementSpecifier);
}
auto* computedStyle = style.get();
const_cast<RenderStyle*>(parentStyle)->addCachedPseudoStyle(WTFMove(style));
return *computedStyle;
}
const RenderStyle* Element::computedStyle(PseudoId pseudoElementSpecifier)
{
if (!isConnected())
return nullptr;
if (PseudoElement* pseudoElement = beforeOrAfterPseudoElement(*this, pseudoElementSpecifier))
return pseudoElement->computedStyle();
auto* style = existingComputedStyle();
if (!style)
style = resolveComputedStyle();
if (pseudoElementSpecifier != PseudoId::None) {
if (auto* cachedPseudoStyle = style->getCachedPseudoStyle(pseudoElementSpecifier))
return cachedPseudoStyle;
return &resolvePseudoElementStyle(pseudoElementSpecifier);
}
return style;
}
bool Element::needsStyleInvalidation() const
{
if (!inRenderedDocument())
return false;
// If :has() is present a change in an element may affect elements outside its subtree.
if (styleValidity() >= Style::Validity::SubtreeInvalid && !Style::Scope::forNode(*this).usesHasPseudoClass())
return false;
if (document().documentElement() && document().documentElement()->styleValidity() >= Style::Validity::SubtreeInvalid)
return false;
if (document().hasPendingFullStyleRebuild())
return false;
return true;
}
void Element::setChildIndex(unsigned index)
{
ElementRareData& rareData = ensureElementRareData();
rareData.setChildIndex(index);
}
bool Element::hasFlagsSetDuringStylingOfChildren() const
{
return childrenAffectedByFirstChildRules()
|| childrenAffectedByLastChildRules()
|| childrenAffectedByForwardPositionalRules()
|| descendantsAffectedByForwardPositionalRules()
|| childrenAffectedByBackwardPositionalRules()
|| descendantsAffectedByBackwardPositionalRules()
|| childrenAffectedByPropertyBasedBackwardPositionalRules();
}
unsigned Element::rareDataChildIndex() const
{
ASSERT(hasRareData());
return elementRareData()->childIndex();
}
AtomString Element::computeInheritedLanguage() const
{
// The language property is inherited, so we iterate over the parents to find the first language.
for (auto& element : lineageOfType<Element>(*this)) {
if (auto* elementData = element.elementData()) {
if (auto* attribute = elementData->findLanguageAttribute())
return attribute->value();
}
}
return document().contentLanguage();
}
Locale& Element::locale() const
{
return document().getCachedLocale(computeInheritedLanguage());
}
void Element::normalizeAttributes()
{
if (!hasAttributes())
return;
auto* attrNodeList = attrNodeListForElement(*this);
if (!attrNodeList)
return;
// Copy the Attr Vector because Node::normalize() can fire synchronous JS
// events (e.g. DOMSubtreeModified) and a JS listener could add / remove
// attributes while we are iterating.
auto copyOfAttrNodeList = *attrNodeList;
for (auto& attrNode : copyOfAttrNodeList)
attrNode->normalize();
}
PseudoElement& Element::ensurePseudoElement(PseudoId pseudoId)
{
if (pseudoId == PseudoId::Before) {
if (!beforePseudoElement())
ensureElementRareData().setBeforePseudoElement(PseudoElement::create(*this, pseudoId));
return *beforePseudoElement();
}
ASSERT(pseudoId == PseudoId::After);
if (!afterPseudoElement())
ensureElementRareData().setAfterPseudoElement(PseudoElement::create(*this, pseudoId));
return *afterPseudoElement();
}
PseudoElement* Element::beforePseudoElement() const
{
return hasRareData() ? elementRareData()->beforePseudoElement() : nullptr;
}
PseudoElement* Element::afterPseudoElement() const
{
return hasRareData() ? elementRareData()->afterPseudoElement() : nullptr;
}
static void disconnectPseudoElement(PseudoElement* pseudoElement)
{
if (!pseudoElement)
return;
ASSERT(!pseudoElement->renderer());
ASSERT(pseudoElement->hostElement());
pseudoElement->clearHostElement();
}
void Element::clearBeforePseudoElementSlow()
{
ASSERT(hasRareData());
disconnectPseudoElement(elementRareData()->beforePseudoElement());
elementRareData()->setBeforePseudoElement(nullptr);
}
void Element::clearAfterPseudoElementSlow()
{
ASSERT(hasRareData());
disconnectPseudoElement(elementRareData()->afterPseudoElement());
elementRareData()->setAfterPseudoElement(nullptr);
}
bool Element::matchesValidPseudoClass() const
{
return false;
}
bool Element::matchesInvalidPseudoClass() const
{
return false;
}
bool Element::matchesReadWritePseudoClass() const
{
return false;
}
bool Element::matchesIndeterminatePseudoClass() const
{
return shouldAppearIndeterminate();
}
bool Element::matchesDefaultPseudoClass() const
{
return false;
}
ExceptionOr<bool> Element::matches(const String& selector)
{
auto query = document().selectorQueryForString(selector);
if (query.hasException())
return query.releaseException();
return query.releaseReturnValue().matches(*this);
}
ExceptionOr<Element*> Element::closest(const String& selector)
{
auto query = document().selectorQueryForString(selector);
if (query.hasException())
return query.releaseException();
return query.releaseReturnValue().closest(*this);
}
bool Element::shouldAppearIndeterminate() const
{
return false;
}
bool Element::mayCauseRepaintInsideViewport(const IntRect* visibleRect) const
{
return renderer() && renderer()->mayCauseRepaintInsideViewport(visibleRect);
}
DOMTokenList& Element::classList()
{
ElementRareData& data = ensureElementRareData();
if (!data.classList())
data.setClassList(makeUnique<DOMTokenList>(*this, HTMLNames::classAttr));
return *data.classList();
}
SpaceSplitString Element::partNames() const
{
return hasRareData() ? elementRareData()->partNames() : SpaceSplitString();
}
DOMTokenList& Element::part()
{
auto& data = ensureElementRareData();
if (!data.partList())
data.setPartList(makeUnique<DOMTokenList>(*this, HTMLNames::partAttr));
return *data.partList();
}
DatasetDOMStringMap& Element::dataset()
{
ElementRareData& data = ensureElementRareData();
if (!data.dataset())
data.setDataset(makeUnique<DatasetDOMStringMap>(*this));
return *data.dataset();
}
URL Element::getURLAttribute(const QualifiedName& name) const
{
#if ASSERT_ENABLED
if (elementData()) {
if (const Attribute* attribute = findAttributeByName(name))
ASSERT(isURLAttribute(*attribute));
}
#endif
return document().completeURL(getAttribute(name));
}
URL Element::getNonEmptyURLAttribute(const QualifiedName& name) const
{
#if ASSERT_ENABLED
if (elementData()) {
if (const Attribute* attribute = findAttributeByName(name))
ASSERT(isURLAttribute(*attribute));
}
#endif
String value = stripLeadingAndTrailingHTMLSpaces(getAttribute(name));
if (value.isEmpty())
return URL();
return document().completeURL(value);
}
int Element::getIntegralAttribute(const QualifiedName& attributeName) const
{
return parseHTMLInteger(getAttribute(attributeName)).value_or(0);
}
void Element::setIntegralAttribute(const QualifiedName& attributeName, int value)
{
setAttribute(attributeName, AtomString::number(value));
}
unsigned Element::getUnsignedIntegralAttribute(const QualifiedName& attributeName) const
{
return parseHTMLNonNegativeInteger(getAttribute(attributeName)).value_or(0);
}
void Element::setUnsignedIntegralAttribute(const QualifiedName& attributeName, unsigned value)
{
setAttribute(attributeName, AtomString::number(limitToOnlyHTMLNonNegative(value)));
}
bool Element::childShouldCreateRenderer(const Node& child) const
{
// Only create renderers for SVG elements whose parents are SVG elements, or for proper <svg xmlns="svgNS"> subdocuments.
if (child.isSVGElement()) {
ASSERT(!isSVGElement());
const SVGElement& childElement = downcast<SVGElement>(child);
return is<SVGSVGElement>(childElement) && childElement.isValid();
}
return true;
}
#if ENABLE(FULLSCREEN_API)
static Element* parentCrossingFrameBoundaries(const Element* element)
{
ASSERT(element);
if (auto* parent = element->parentElementInComposedTree())
return parent;
return element->document().ownerElement();
}
void Element::webkitRequestFullscreen()
{
document().fullscreenManager().requestFullscreenForElement(*this, FullscreenManager::EnforceIFrameAllowFullscreenRequirement);
}
void Element::setContainsFullScreenElement(bool flag)
{
if (flag)
setNodeFlag(NodeFlag::ContainsFullScreenElement);
else
clearNodeFlag(NodeFlag::ContainsFullScreenElement);
invalidateStyleAndLayerComposition();
}
void Element::setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(bool flag)
{
Element* element = this;
while ((element = parentCrossingFrameBoundaries(element)))
element->setContainsFullScreenElement(flag);
}
#endif
ExceptionOr<void> Element::setPointerCapture(int32_t pointerId)
{
if (document().page())
return document().page()->pointerCaptureController().setPointerCapture(this, pointerId);
return { };
}
ExceptionOr<void> Element::releasePointerCapture(int32_t pointerId)
{
if (document().page())
return document().page()->pointerCaptureController().releasePointerCapture(this, pointerId);
return { };
}
bool Element::hasPointerCapture(int32_t pointerId)
{
if (document().page())
return document().page()->pointerCaptureController().hasPointerCapture(this, pointerId);
return false;
}
#if ENABLE(POINTER_LOCK)
void Element::requestPointerLock()
{
if (document().page())
document().page()->pointerLockController().requestPointerLock(this);
}
#endif
void Element::disconnectFromIntersectionObservers()
{
auto* observerData = intersectionObserverDataIfExists();
if (!observerData)
return;
for (const auto& registration : observerData->registrations) {
if (registration.observer)
registration.observer->targetDestroyed(*this);
}
observerData->registrations.clear();
for (const auto& observer : observerData->observers) {
if (observer)
observer->rootDestroyed();
}
observerData->observers.clear();
}
IntersectionObserverData& Element::ensureIntersectionObserverData()
{
auto& rareData = ensureElementRareData();
if (!rareData.intersectionObserverData())
rareData.setIntersectionObserverData(makeUnique<IntersectionObserverData>());
return *rareData.intersectionObserverData();
}
IntersectionObserverData* Element::intersectionObserverDataIfExists()
{
return hasRareData() ? elementRareData()->intersectionObserverData() : nullptr;
}
ElementAnimationRareData* Element::animationRareData(PseudoId pseudoId) const
{
return hasRareData() ? elementRareData()->animationRareData(pseudoId) : nullptr;
}
ElementAnimationRareData& Element::ensureAnimationRareData(PseudoId pseudoId)
{
return ensureElementRareData().ensureAnimationRareData(pseudoId);
}
KeyframeEffectStack* Element::keyframeEffectStack(PseudoId pseudoId) const
{
if (auto* animationData = animationRareData(pseudoId))
return animationData->keyframeEffectStack();
return nullptr;
}
KeyframeEffectStack& Element::ensureKeyframeEffectStack(PseudoId pseudoId)
{
return ensureAnimationRareData(pseudoId).ensureKeyframeEffectStack();
}
bool Element::hasKeyframeEffects(PseudoId pseudoId) const
{
if (auto* animationData = animationRareData(pseudoId)) {
if (auto* keyframeEffectStack = animationData->keyframeEffectStack())
return keyframeEffectStack->hasEffects();
}
return false;
}
const AnimationCollection* Element::animations(PseudoId pseudoId) const
{
if (auto* animationData = animationRareData(pseudoId))
return &animationData->animations();
return nullptr;
}
bool Element::hasCompletedTransitionForProperty(PseudoId pseudoId, CSSPropertyID property) const
{
if (auto* animationData = animationRareData(pseudoId))
return animationData->completedTransitionsByProperty().contains(property);
return false;
}
bool Element::hasRunningTransitionForProperty(PseudoId pseudoId, CSSPropertyID property) const
{
if (auto* animationData = animationRareData(pseudoId))
return animationData->runningTransitionsByProperty().contains(property);
return false;
}
bool Element::hasRunningTransitions(PseudoId pseudoId) const
{
if (auto* animationData = animationRareData(pseudoId))
return !animationData->runningTransitionsByProperty().isEmpty();
return false;
}
AnimationCollection& Element::ensureAnimations(PseudoId pseudoId)
{
return ensureAnimationRareData(pseudoId).animations();
}
CSSAnimationCollection& Element::animationsCreatedByMarkup(PseudoId pseudoId)
{
return ensureAnimationRareData(pseudoId).animationsCreatedByMarkup();
}
void Element::setAnimationsCreatedByMarkup(PseudoId pseudoId, CSSAnimationCollection&& animations)
{
if (animations.isEmpty() && !animationRareData(pseudoId))
return;
ensureAnimationRareData(pseudoId).setAnimationsCreatedByMarkup(WTFMove(animations));
}
PropertyToTransitionMap& Element::ensureCompletedTransitionsByProperty(PseudoId pseudoId)
{
return ensureAnimationRareData(pseudoId).completedTransitionsByProperty();
}
PropertyToTransitionMap& Element::ensureRunningTransitionsByProperty(PseudoId pseudoId)
{
return ensureAnimationRareData(pseudoId).runningTransitionsByProperty();
}
const RenderStyle* Element::lastStyleChangeEventStyle(PseudoId pseudoId) const
{
if (auto* animationData = animationRareData(pseudoId))
return animationData->lastStyleChangeEventStyle();
return nullptr;
}
void Element::setLastStyleChangeEventStyle(PseudoId pseudoId, std::unique_ptr<const RenderStyle>&& style)
{
if (auto* animationData = animationRareData(pseudoId))
animationData->setLastStyleChangeEventStyle(WTFMove(style));
else if (style)
ensureAnimationRareData(pseudoId).setLastStyleChangeEventStyle(WTFMove(style));
}
void Element::cssAnimationsDidUpdate(PseudoId pseudoId)
{
ensureAnimationRareData(pseudoId).cssAnimationsDidUpdate();
}
void Element::keyframesRuleDidChange(PseudoId pseudoId)
{
ensureAnimationRareData(pseudoId).keyframesRuleDidChange();
}
bool Element::hasPendingKeyframesUpdate(PseudoId pseudoId) const
{
auto* data = animationRareData(pseudoId);
return data && data->hasPendingKeyframesUpdate();
}
void Element::disconnectFromResizeObservers()
{
auto* observerData = resizeObserverData();
if (!observerData)
return;
for (const auto& observer : observerData->observers)
observer->targetDestroyed(*this);
observerData->observers.clear();
}
ResizeObserverData& Element::ensureResizeObserverData()
{
auto& rareData = ensureElementRareData();
if (!rareData.resizeObserverData())
rareData.setResizeObserverData(makeUnique<ResizeObserverData>());
return *rareData.resizeObserverData();
}
ResizeObserverData* Element::resizeObserverData()
{
return hasRareData() ? elementRareData()->resizeObserverData() : nullptr;
}
bool Element::isSpellCheckingEnabled() const
{
for (auto* ancestor = this; ancestor; ancestor = ancestor->parentOrShadowHostElement()) {
auto& value = ancestor->attributeWithoutSynchronization(HTMLNames::spellcheckAttr);
if (value.isNull())
continue;
if (value.isEmpty() || equalLettersIgnoringASCIICase(value, "true"_s))
return true;
if (equalLettersIgnoringASCIICase(value, "false"_s))
return false;
}
return true;
}
#if ASSERT_ENABLED
bool Element::fastAttributeLookupAllowed(const QualifiedName& name) const
{
if (name == HTMLNames::styleAttr)
return false;
if (isSVGElement())
return !downcast<SVGElement>(*this).isAnimatedPropertyAttribute(name);
return true;
}
#endif
#if DUMP_NODE_STATISTICS
bool Element::hasNamedNodeMap() const
{
return hasRareData() && elementRareData()->attributeMap();
}
#endif
inline void Element::updateName(const AtomString& oldName, const AtomString& newName)
{
if (!isInTreeScope())
return;
if (oldName == newName)
return;
updateNameForTreeScope(treeScope(), oldName, newName);
if (!isConnected())
return;
if (!is<HTMLDocument>(document()))
return;
updateNameForDocument(downcast<HTMLDocument>(document()), oldName, newName);
}
void Element::updateNameForTreeScope(TreeScope& scope, const AtomString& oldName, const AtomString& newName)
{
ASSERT(oldName != newName);
if (!oldName.isEmpty())
scope.removeElementByName(*oldName.impl(), *this);
if (!newName.isEmpty())
scope.addElementByName(*newName.impl(), *this);
}
void Element::updateNameForDocument(HTMLDocument& document, const AtomString& oldName, const AtomString& newName)
{
ASSERT(oldName != newName);
if (isInShadowTree())
return;
if (WindowNameCollection::elementMatchesIfNameAttributeMatch(*this)) {
const AtomString& id = WindowNameCollection::elementMatchesIfIdAttributeMatch(*this) ? getIdAttribute() : nullAtom();
if (!oldName.isEmpty() && oldName != id)
document.removeWindowNamedItem(*oldName.impl(), *this);
if (!newName.isEmpty() && newName != id)
document.addWindowNamedItem(*newName.impl(), *this);
}
if (DocumentNameCollection::elementMatchesIfNameAttributeMatch(*this)) {
const AtomString& id = DocumentNameCollection::elementMatchesIfIdAttributeMatch(*this) ? getIdAttribute() : nullAtom();
if (!oldName.isEmpty() && oldName != id)
document.removeDocumentNamedItem(*oldName.impl(), *this);
if (!newName.isEmpty() && newName != id)
document.addDocumentNamedItem(*newName.impl(), *this);
}
}
inline void Element::updateId(const AtomString& oldId, const AtomString& newId, NotifyObservers notifyObservers)
{
if (!isInTreeScope())
return;
if (oldId == newId)
return;
updateIdForTreeScope(treeScope(), oldId, newId, notifyObservers);
if (!isConnected())
return;
if (!is<HTMLDocument>(document()))
return;
updateIdForDocument(downcast<HTMLDocument>(document()), oldId, newId, UpdateHTMLDocumentNamedItemMapsOnlyIfDiffersFromNameAttribute);
}
void Element::updateIdForTreeScope(TreeScope& scope, const AtomString& oldId, const AtomString& newId, NotifyObservers notifyObservers)
{
ASSERT(isInTreeScope());
ASSERT(oldId != newId);
if (!oldId.isEmpty())
scope.removeElementById(*oldId.impl(), *this, notifyObservers == NotifyObservers::Yes);
if (!newId.isEmpty())
scope.addElementById(*newId.impl(), *this, notifyObservers == NotifyObservers::Yes);
}
void Element::updateIdForDocument(HTMLDocument& document, const AtomString& oldId, const AtomString& newId, HTMLDocumentNamedItemMapsUpdatingCondition condition)
{
ASSERT(isConnected());
ASSERT(oldId != newId);
if (isInShadowTree())
return;
if (WindowNameCollection::elementMatchesIfIdAttributeMatch(*this)) {
const AtomString& name = condition == UpdateHTMLDocumentNamedItemMapsOnlyIfDiffersFromNameAttribute && WindowNameCollection::elementMatchesIfNameAttributeMatch(*this) ? getNameAttribute() : nullAtom();
if (!oldId.isEmpty() && oldId != name)
document.removeWindowNamedItem(*oldId.impl(), *this);
if (!newId.isEmpty() && newId != name)
document.addWindowNamedItem(*newId.impl(), *this);
}
if (DocumentNameCollection::elementMatchesIfIdAttributeMatch(*this)) {
const AtomString& name = condition == UpdateHTMLDocumentNamedItemMapsOnlyIfDiffersFromNameAttribute && DocumentNameCollection::elementMatchesIfNameAttributeMatch(*this) ? getNameAttribute() : nullAtom();
if (!oldId.isEmpty() && oldId != name)
document.removeDocumentNamedItem(*oldId.impl(), *this);
if (!newId.isEmpty() && newId != name)
document.addDocumentNamedItem(*newId.impl(), *this);
}
}
void Element::updateLabel(TreeScope& scope, const AtomString& oldForAttributeValue, const AtomString& newForAttributeValue)
{
ASSERT(hasTagName(labelTag));
if (!isConnected())
return;
if (oldForAttributeValue == newForAttributeValue)
return;
if (!oldForAttributeValue.isEmpty())
scope.removeLabel(*oldForAttributeValue.impl(), downcast<HTMLLabelElement>(*this));
if (!newForAttributeValue.isEmpty())
scope.addLabel(*newForAttributeValue.impl(), downcast<HTMLLabelElement>(*this));
}
void Element::willModifyAttribute(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue)
{
if (name == HTMLNames::idAttr)
updateId(oldValue, newValue, NotifyObservers::No); // Will notify observers after the attribute is actually changed.
else if (name == HTMLNames::nameAttr)
updateName(oldValue, newValue);
else if (name == HTMLNames::forAttr && hasTagName(labelTag)) {
if (treeScope().shouldCacheLabelsByForAttribute())
updateLabel(treeScope(), oldValue, newValue);
}
if (auto recipients = MutationObserverInterestGroup::createForAttributesMutation(*this, name))
recipients->enqueueMutationRecord(MutationRecord::createAttributes(*this, name, oldValue));
InspectorInstrumentation::willModifyDOMAttr(document(), *this, oldValue, newValue);
}
void Element::didAddAttribute(const QualifiedName& name, const AtomString& value)
{
attributeChanged(name, nullAtom(), value);
InspectorInstrumentation::didModifyDOMAttr(document(), *this, name.toAtomString(), value);
dispatchSubtreeModifiedEvent();
}
void Element::didModifyAttribute(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue)
{
attributeChanged(name, oldValue, newValue);
InspectorInstrumentation::didModifyDOMAttr(document(), *this, name.toAtomString(), newValue);
// Do not dispatch a DOMSubtreeModified event here; see bug 81141.
}
void Element::didRemoveAttribute(const QualifiedName& name, const AtomString& oldValue)
{
attributeChanged(name, oldValue, nullAtom());
InspectorInstrumentation::didRemoveDOMAttr(document(), *this, name.toAtomString());
dispatchSubtreeModifiedEvent();
}
IntPoint Element::savedLayerScrollPosition() const
{
return hasRareData() ? elementRareData()->savedLayerScrollPosition() : IntPoint();
}
void Element::setSavedLayerScrollPositionSlow(const IntPoint& position)
{
ASSERT(!position.isZero() || hasRareData());
ensureElementRareData().setSavedLayerScrollPosition(position);
}
RefPtr<Attr> Element::attrIfExists(const AtomString& localName, bool shouldIgnoreAttributeCase)
{
if (auto* attrNodeList = attrNodeListForElement(*this))
return findAttrNodeInList(*attrNodeList, localName, shouldIgnoreAttributeCase);
return nullptr;
}
RefPtr<Attr> Element::attrIfExists(const QualifiedName& name)
{
if (auto* attrNodeList = attrNodeListForElement(*this))
return findAttrNodeInList(*attrNodeList, name);
return nullptr;
}
Ref<Attr> Element::ensureAttr(const QualifiedName& name)
{
auto& attrNodeList = ensureAttrNodeListForElement(*this);
RefPtr<Attr> attrNode = findAttrNodeInList(attrNodeList, name);
if (!attrNode) {
attrNode = Attr::create(*this, name);
attrNode->setTreeScopeRecursively(treeScope());
attrNodeList.append(attrNode);
}
return attrNode.releaseNonNull();
}
void Element::detachAttrNodeFromElementWithValue(Attr* attrNode, const AtomString& value)
{
ASSERT(hasSyntheticAttrChildNodes());
attrNode->detachFromElementWithValue(value);
auto& attrNodeList = *attrNodeListForElement(*this);
bool found = attrNodeList.removeFirstMatching([attrNode](auto& attribute) {
return attribute->qualifiedName() == attrNode->qualifiedName();
});
ASSERT_UNUSED(found, found);
if (attrNodeList.isEmpty())
removeAttrNodeListForElement(*this);
}
void Element::detachAllAttrNodesFromElement()
{
auto* attrNodeList = attrNodeListForElement(*this);
ASSERT(attrNodeList);
for (const Attribute& attribute : attributesIterator()) {
if (RefPtr<Attr> attrNode = findAttrNodeInList(*attrNodeList, attribute.name()))
attrNode->detachFromElementWithValue(attribute.value());
}
removeAttrNodeListForElement(*this);
}
void Element::resetComputedStyle()
{
if (!hasRareData() || !elementRareData()->computedStyle())
return;
auto reset = [](Element& element) {
if (element.hasCustomStyleResolveCallbacks())
element.willResetComputedStyle();
element.elementRareData()->resetComputedStyle();
};
reset(*this);
for (auto& child : descendantsOfType<Element>(*this)) {
if (!child.hasRareData() || !child.elementRareData()->computedStyle() || child.hasDisplayContents())
continue;
reset(child);
}
}
void Element::resetStyleRelations()
{
clearStyleFlags(NodeStyleFlag::StyleAffectedByEmpty);
if (!hasRareData())
return;
elementRareData()->setChildIndex(0);
}
void Element::resetChildStyleRelations()
{
clearStyleFlags({
NodeStyleFlag::ChildrenAffectedByFirstChildRules,
NodeStyleFlag::ChildrenAffectedByLastChildRules,
NodeStyleFlag::ChildrenAffectedByForwardPositionalRules,
NodeStyleFlag::ChildrenAffectedByBackwardPositionalRules,
NodeStyleFlag::ChildrenAffectedByPropertyBasedBackwardPositionalRules
});
}
void Element::resetAllDescendantStyleRelations()
{
resetChildStyleRelations();
clearStyleFlags({
NodeStyleFlag::DescendantsAffectedByForwardPositionalRules,
NodeStyleFlag::DescendantsAffectedByBackwardPositionalRules
});
}
void Element::clearHoverAndActiveStatusBeforeDetachingRenderer()
{
if (!isUserActionElement())
return;
if (hovered())
document().hoveredElementDidDetach(*this);
if (isInActiveChain())
document().elementInActiveChainDidDetach(*this);
document().userActionElements().clearActiveAndHovered(*this);
}
void Element::willRecalcStyle(Style::Change)
{
ASSERT(hasCustomStyleResolveCallbacks());
}
void Element::didRecalcStyle(Style::Change)
{
ASSERT(hasCustomStyleResolveCallbacks());
}
void Element::willResetComputedStyle()
{
ASSERT(hasCustomStyleResolveCallbacks());
}
void Element::willAttachRenderers()
{
ASSERT(hasCustomStyleResolveCallbacks());
}
void Element::didAttachRenderers()
{
ASSERT(hasCustomStyleResolveCallbacks());
}
void Element::willDetachRenderers()
{
ASSERT(hasCustomStyleResolveCallbacks());
}
void Element::didDetachRenderers()
{
ASSERT(hasCustomStyleResolveCallbacks());
}
std::optional<Style::ElementStyle> Element::resolveCustomStyle(const Style::ResolutionContext&, const RenderStyle*)
{
ASSERT(hasCustomStyleResolveCallbacks());
return std::nullopt;
}
void Element::cloneAttributesFromElement(const Element& other)
{
if (hasSyntheticAttrChildNodes())
detachAllAttrNodesFromElement();
other.synchronizeAllAttributes();
if (!other.m_elementData) {
m_elementData = nullptr;
return;
}
// We can't update window and document's named item maps since the presence of image and object elements depend on other attributes and children.
// Fortunately, those named item maps are only updated when this element is in the document, which should never be the case.
ASSERT(!isConnected());
const AtomString& oldID = getIdAttribute();
const AtomString& newID = other.getIdAttribute();
if (!oldID.isNull() || !newID.isNull())
updateId(oldID, newID, NotifyObservers::No); // Will notify observers after the attribute is actually changed.
const AtomString& oldName = getNameAttribute();
const AtomString& newName = other.getNameAttribute();
if (!oldName.isNull() || !newName.isNull())
updateName(oldName, newName);
// If 'other' has a mutable ElementData, convert it to an immutable one so we can share it between both elements.
// We can only do this if there is no CSSOM wrapper for other's inline style, and there are no presentation attributes.
if (is<UniqueElementData>(*other.m_elementData)
&& !other.m_elementData->presentationalHintStyle()
&& (!other.m_elementData->inlineStyle() || !other.m_elementData->inlineStyle()->hasCSSOMWrapper()))
const_cast<Element&>(other).m_elementData = downcast<UniqueElementData>(*other.m_elementData).makeShareableCopy();
if (!other.m_elementData->isUnique())
m_elementData = other.m_elementData;
else
m_elementData = other.m_elementData->makeUniqueCopy();
for (const Attribute& attribute : attributesIterator())
attributeChanged(attribute.name(), nullAtom(), attribute.value(), ModifiedByCloning);
setNonce(other.nonce());
}
void Element::cloneDataFromElement(const Element& other)
{
cloneAttributesFromElement(other);
copyNonAttributePropertiesFromElement(other);
}
void Element::createUniqueElementData()
{
if (!m_elementData)
m_elementData = UniqueElementData::create();
else
m_elementData = downcast<ShareableElementData>(*m_elementData).makeUniqueCopy();
}
bool Element::canContainRangeEndPoint() const
{
return !equalLettersIgnoringASCIICase(attributeWithoutSynchronization(roleAttr), "img"_s);
}
String Element::completeURLsInAttributeValue(const URL& base, const Attribute& attribute) const
{
return URL(base, attribute.value()).string();
}
ExceptionOr<Node*> Element::insertAdjacent(const String& where, Ref<Node>&& newChild)
{
// In Internet Explorer if the element has no parent and where is "beforeBegin" or "afterEnd",
// a document fragment is created and the elements appended in the correct order. This document
// fragment isn't returned anywhere.
//
// This is impossible for us to implement as the DOM tree does not allow for such structures,
// Opera also appears to disallow such usage.
if (equalLettersIgnoringASCIICase(where, "beforebegin"_s)) {
auto* parent = this->parentNode();
if (!parent)
return nullptr;
auto result = parent->insertBefore(newChild, this);
if (result.hasException())
return result.releaseException();
return newChild.ptr();
}
if (equalLettersIgnoringASCIICase(where, "afterbegin"_s)) {
auto result = insertBefore(newChild, firstChild());
if (result.hasException())
return result.releaseException();
return newChild.ptr();
}
if (equalLettersIgnoringASCIICase(where, "beforeend"_s)) {
auto result = appendChild(newChild);
if (result.hasException())
return result.releaseException();
return newChild.ptr();
}
if (equalLettersIgnoringASCIICase(where, "afterend"_s)) {
auto* parent = this->parentNode();
if (!parent)
return nullptr;
auto result = parent->insertBefore(newChild, nextSibling());
if (result.hasException())
return result.releaseException();
return newChild.ptr();
}
return Exception { SyntaxError };
}
ExceptionOr<Element*> Element::insertAdjacentElement(const String& where, Element& newChild)
{
auto result = insertAdjacent(where, newChild);
if (result.hasException())
return result.releaseException();
return downcast<Element>(result.releaseReturnValue());
}
// Step 1 of https://w3c.github.io/DOM-Parsing/#dom-element-insertadjacenthtml.
static ExceptionOr<ContainerNode&> contextNodeForInsertion(const String& where, Element& element)
{
if (equalLettersIgnoringASCIICase(where, "beforebegin"_s) || equalLettersIgnoringASCIICase(where, "afterend"_s)) {
auto* parent = element.parentNode();
if (!parent || is<Document>(*parent))
return Exception { NoModificationAllowedError };
return *parent;
}
if (equalLettersIgnoringASCIICase(where, "afterbegin"_s) || equalLettersIgnoringASCIICase(where, "beforeend"_s))
return element;
return Exception { SyntaxError };
}
// Step 2 of https://w3c.github.io/DOM-Parsing/#dom-element-insertadjacenthtml.
static ExceptionOr<Ref<Element>> contextElementForInsertion(const String& where, Element& element)
{
auto contextNodeResult = contextNodeForInsertion(where, element);
if (contextNodeResult.hasException())
return contextNodeResult.releaseException();
auto& contextNode = contextNodeResult.releaseReturnValue();
if (!is<Element>(contextNode) || (contextNode.document().isHTMLDocument() && is<HTMLHtmlElement>(contextNode)))
return Ref<Element> { HTMLBodyElement::create(contextNode.document()) };
return Ref<Element> { downcast<Element>(contextNode) };
}
// https://w3c.github.io/DOM-Parsing/#dom-element-insertadjacenthtml
ExceptionOr<void> Element::insertAdjacentHTML(const String& where, const String& markup, NodeVector* addedNodes)
{
// Steps 1 and 2.
auto contextElement = contextElementForInsertion(where, *this);
if (contextElement.hasException())
return contextElement.releaseException();
// Step 3.
auto fragment = createFragmentForInnerOuterHTML(contextElement.releaseReturnValue(), markup, AllowScriptingContent);
if (fragment.hasException())
return fragment.releaseException();
if (UNLIKELY(addedNodes)) {
// Must be called before insertAdjacent, as otherwise the children of fragment will be moved
// to their new parent and will be harder to keep track of.
collectChildNodes(fragment.returnValue(), *addedNodes);
}
// Step 4.
auto result = insertAdjacent(where, fragment.releaseReturnValue());
if (result.hasException())
return result.releaseException();
return { };
}
ExceptionOr<void> Element::insertAdjacentHTML(const String& where, const String& markup)
{
return insertAdjacentHTML(where, markup, nullptr);
}
ExceptionOr<void> Element::insertAdjacentText(const String& where, String&& text)
{
auto result = insertAdjacent(where, document().createTextNode(WTFMove(text)));
if (result.hasException())
return result.releaseException();
return { };
}
Element* Element::findAnchorElementForLink(String& outAnchorName)
{
if (!isLink())
return nullptr;
const AtomString& href = attributeWithoutSynchronization(HTMLNames::hrefAttr);
if (href.isNull())
return nullptr;
Document& document = this->document();
URL url = document.completeURL(href);
if (!url.isValid())
return nullptr;
if (url.hasFragmentIdentifier() && equalIgnoringFragmentIdentifier(url, document.baseURL())) {
outAnchorName = url.fragmentIdentifier().toString();
return document.findAnchor(outAnchorName);
}
return nullptr;
}
ExceptionOr<Ref<WebAnimation>> Element::animate(JSC::JSGlobalObject& lexicalGlobalObject, JSC::Strong<JSC::JSObject>&& keyframes, std::optional<std::variant<double, KeyframeAnimationOptions>>&& options)
{
String id = emptyString();
std::optional<RefPtr<AnimationTimeline>> timeline;
std::variant<FramesPerSecond, AnimationFrameRatePreset> frameRate = AnimationFrameRatePreset::Auto;
std::optional<std::variant<double, KeyframeEffectOptions>> keyframeEffectOptions;
if (options) {
auto optionsValue = options.value();
std::variant<double, KeyframeEffectOptions> keyframeEffectOptionsVariant;
if (std::holds_alternative<double>(optionsValue))
keyframeEffectOptionsVariant = std::get<double>(optionsValue);
else {
auto keyframeEffectOptions = std::get<KeyframeAnimationOptions>(optionsValue);
id = keyframeEffectOptions.id;
frameRate = keyframeEffectOptions.frameRate;
timeline = keyframeEffectOptions.timeline;
keyframeEffectOptionsVariant = WTFMove(keyframeEffectOptions);
}
keyframeEffectOptions = keyframeEffectOptionsVariant;
}
auto keyframeEffectResult = KeyframeEffect::create(lexicalGlobalObject, document(), this, WTFMove(keyframes), WTFMove(keyframeEffectOptions));
if (keyframeEffectResult.hasException())
return keyframeEffectResult.releaseException();
auto animation = WebAnimation::create(document(), &keyframeEffectResult.returnValue().get());
animation->setId(id);
if (timeline)
animation->setTimeline(timeline->get());
animation->setBindingsFrameRate(WTFMove(frameRate));
auto animationPlayResult = animation->play();
if (animationPlayResult.hasException())
return animationPlayResult.releaseException();
return animation;
}
Vector<RefPtr<WebAnimation>> Element::getAnimations(std::optional<GetAnimationsOptions> options)
{
// If we are to return animations in the subtree, we can get all of the document's animations and filter
// animations targeting that are not registered on this element, one of its pseudo elements or a child's
// pseudo element.
if (options && options->subtree) {
return document().matchingAnimations([&] (Element& target) -> bool {
return contains(&target);
});
}
// For the list of animations to be current, we need to account for any pending CSS changes,
// such as updates to CSS Animations and CSS Transitions. This requires updating layout as
// well since resolving layout-dependent media queries could yield animations.
// FIXME: We might be able to use ComputedStyleExtractor which is more optimized.
if (RefPtr owner = document().ownerElement())
owner->document().updateLayout();
document().updateStyleIfNeeded();
Vector<RefPtr<WebAnimation>> animations;
if (auto* effectStack = keyframeEffectStack(PseudoId::None)) {
for (auto& effect : effectStack->sortedEffects()) {
if (effect->animation()->isRelevant())
animations.append(effect->animation());
}
}
return animations;
}
static WeakHashMap<Element, ElementIdentifier>& elementIdentifiersMap()
{
static MainThreadNeverDestroyed<WeakHashMap<Element, ElementIdentifier>> map;
return map;
}
ElementIdentifier Element::identifier() const
{
return elementIdentifiersMap().ensure(*this, [] { return ElementIdentifier::generate(); }).iterator->value;
}
Element* Element::fromIdentifier(ElementIdentifier identifier)
{
for (auto [element, elementIdentifier] : elementIdentifiersMap()) {
if (elementIdentifier == identifier)
return &element;
}
return nullptr;
}
#if ENABLE(CSS_TYPED_OM)
StylePropertyMap* Element::attributeStyleMap()
{
if (!hasRareData())
return nullptr;
return elementRareData()->attributeStyleMap();
}
void Element::setAttributeStyleMap(Ref<StylePropertyMap>&& map)
{
ensureElementRareData().setAttributeStyleMap(WTFMove(map));
}
StylePropertyMapReadOnly* Element::computedStyleMap()
{
auto& rareData = ensureElementRareData();
if (auto* map = rareData.computedStyleMap())
return map;
auto map = ComputedStylePropertyMapReadOnly::create(*this);
rareData.setComputedStyleMap(WTFMove(map));
return rareData.computedStyleMap();
}
#endif
} // namespace WebCore