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* Copyright (C) 1999 Lars Knoll (
* (C) 1999 Antti Koivisto (
* (C) 2001 Peter Kelly (
* (C) 2001 Dirk Mueller (
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013 Apple Inc. All rights reserved.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* 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.
#ifndef Element_h
#define Element_h
#include "CSSPropertyNames.h"
#include "HTMLNames.h"
#include "core/css/CSSPrimitiveValue.h"
#include "core/dom/Attribute.h"
#include "core/dom/Document.h"
#include "core/dom/ElementData.h"
#include "core/dom/SpaceSplitString.h"
#include "core/html/CollectionType.h"
#include "core/page/FocusDirection.h"
#include "core/rendering/RegionOversetState.h"
#include "platform/scroll/ScrollTypes.h"
namespace WebCore {
class ActiveAnimations;
class Attr;
class Attribute;
class ClientRect;
class ClientRectList;
class DOMStringMap;
class DOMTokenList;
class ElementRareData;
class ElementShadow;
class ExceptionState;
class Image;
class InputMethodContext;
class IntSize;
class Locale;
class MutableStylePropertySet;
class PropertySetCSSStyleDeclaration;
class PseudoElement;
class RenderRegion;
class ShadowRoot;
class StylePropertySet;
enum AffectedSelectorType {
AffectedSelectorChecked = 1,
AffectedSelectorEnabled = 1 << 1,
AffectedSelectorDisabled = 1 << 2,
AffectedSelectorIndeterminate = 1 << 3,
AffectedSelectorLink = 1 << 4,
AffectedSelectorTarget = 1 << 5,
AffectedSelectorVisited = 1 << 6
typedef int AffectedSelectorMask;
enum SpellcheckAttributeState {
class Element : public ContainerNode {
static PassRefPtr<Element> create(const QualifiedName&, Document*);
virtual ~Element();
bool hasAttribute(const QualifiedName&) const;
const AtomicString& getAttribute(const QualifiedName&) const;
void setAttribute(const QualifiedName&, const AtomicString& value);
void setSynchronizedLazyAttribute(const QualifiedName&, const AtomicString& value);
void removeAttribute(const QualifiedName&);
// Typed getters and setters for language bindings.
int getIntegralAttribute(const QualifiedName& attributeName) const;
void setIntegralAttribute(const QualifiedName& attributeName, int value);
unsigned getUnsignedIntegralAttribute(const QualifiedName& attributeName) const;
void setUnsignedIntegralAttribute(const QualifiedName& attributeName, unsigned value);
// Call this to get the value of an attribute that is known not to be the style
// attribute or one of the SVG animatable attributes.
bool fastHasAttribute(const QualifiedName&) const;
const AtomicString& fastGetAttribute(const QualifiedName&) const;
#ifndef NDEBUG
bool fastAttributeLookupAllowed(const QualifiedName&) const;
bool hasNamedNodeMap() const;
bool hasAttributes() const;
// This variant will not update the potentially invalid attributes. To be used when not interested
// in style attribute or one of the SVG animation attributes.
bool hasAttributesWithoutUpdate() const;
bool hasAttribute(const AtomicString& name) const;
bool hasAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName) const;
const AtomicString& getAttribute(const AtomicString& name) const;
const AtomicString& getAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName) const;
void setAttribute(const AtomicString& name, const AtomicString& value, ExceptionState&);
static bool parseAttributeName(QualifiedName&, const AtomicString& namespaceURI, const AtomicString& qualifiedName, ExceptionState&);
void setAttributeNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, const AtomicString& value, ExceptionState&);
bool isIdAttributeName(const QualifiedName&) const;
const AtomicString& getIdAttribute() const;
void setIdAttribute(const AtomicString&);
const AtomicString& getNameAttribute() const;
const AtomicString& getClassAttribute() const;
bool shouldIgnoreAttributeCase() const;
// Call this to get the value of the id attribute for style resolution purposes.
// The value will already be lowercased if the document is in compatibility mode,
// so this function is not suitable for non-style uses.
const AtomicString& idForStyleResolution() const;
// Internal methods that assume the existence of attribute storage, one should use hasAttributes()
// before calling them.
size_t attributeCount() const;
const Attribute* attributeItem(unsigned index) const;
const Attribute* getAttributeItem(const QualifiedName&) const;
size_t getAttributeItemIndex(const QualifiedName& name) const { return elementData()->getAttributeItemIndex(name); }
size_t getAttributeItemIndex(const AtomicString& name, bool shouldIgnoreAttributeCase) const { return elementData()->getAttributeItemIndex(name, shouldIgnoreAttributeCase); }
void scrollIntoView(bool alignToTop = true);
void scrollIntoViewIfNeeded(bool centerIfNeeded = true);
void scrollByLines(int lines);
void scrollByPages(int pages);
int offsetLeft();
int offsetTop();
int offsetWidth();
int offsetHeight();
// FIXME: Replace uses of offsetParent in the platform with calls
// to the render layer and merge bindingsOffsetParent and offsetParent.
Element* bindingsOffsetParent();
Element* offsetParent();
int clientLeft();
int clientTop();
int clientWidth();
int clientHeight();
virtual int scrollLeft();
virtual int scrollTop();
virtual void setScrollLeft(int);
virtual void setScrollTop(int);
virtual int scrollWidth();
virtual int scrollHeight();
IntRect boundsInRootViewSpace();
PassRefPtr<ClientRectList> getClientRects();
PassRefPtr<ClientRect> getBoundingClientRect();
// Returns the absolute bounding box translated into screen coordinates:
IntRect screenRect() const;
virtual void didMoveToNewDocument(Document&) OVERRIDE;
void removeAttribute(const AtomicString& name);
void removeAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName);
PassRefPtr<Attr> detachAttribute(size_t index);
PassRefPtr<Attr> getAttributeNode(const AtomicString& name);
PassRefPtr<Attr> getAttributeNodeNS(const AtomicString& namespaceURI, const AtomicString& localName);
PassRefPtr<Attr> setAttributeNode(Attr*, ExceptionState&);
PassRefPtr<Attr> setAttributeNodeNS(Attr*, ExceptionState&);
PassRefPtr<Attr> removeAttributeNode(Attr*, ExceptionState&);
PassRefPtr<Attr> attrIfExists(const QualifiedName&);
PassRefPtr<Attr> ensureAttr(const QualifiedName&);
const Vector<RefPtr<Attr> >& attrNodeList();
CSSStyleDeclaration* style();
const QualifiedName& tagQName() const { return m_tagName; }
String tagName() const { return nodeName(); }
bool hasTagName(const QualifiedName& tagName) const { return m_tagName.matches(tagName); }
// A fast function for checking the local name against another atomic string.
bool hasLocalName(const AtomicString& other) const { return m_tagName.localName() == other; }
bool hasLocalName(const QualifiedName& other) const { return m_tagName.localName() == other.localName(); }
virtual const AtomicString& localName() const OVERRIDE { return m_tagName.localName(); }
virtual const AtomicString& prefix() const OVERRIDE { return m_tagName.prefix(); }
virtual const AtomicString& namespaceURI() const OVERRIDE { return m_tagName.namespaceURI(); }
virtual KURL baseURI() const OVERRIDE FINAL;
virtual String nodeName() const;
PassRefPtr<Element> cloneElementWithChildren();
PassRefPtr<Element> cloneElementWithoutChildren();
void scheduleLayerUpdate();
void normalizeAttributes();
String nodeNamePreservingCase() const;
void setBooleanAttribute(const QualifiedName& name, bool);
virtual const StylePropertySet* additionalPresentationAttributeStyle() { return 0; }
void invalidateStyleAttribute();
const StylePropertySet* inlineStyle() const { return elementData() ? elementData()->m_inlineStyle.get() : 0; }
bool setInlineStyleProperty(CSSPropertyID, CSSValueID identifier, bool important = false);
bool setInlineStyleProperty(CSSPropertyID, CSSPropertyID identifier, bool important = false);
bool setInlineStyleProperty(CSSPropertyID, double value, CSSPrimitiveValue::UnitTypes, bool important = false);
bool setInlineStyleProperty(CSSPropertyID, const String& value, bool important = false);
bool removeInlineStyleProperty(CSSPropertyID);
void removeAllInlineStyleProperties();
void synchronizeStyleAttributeInternal() const;
const StylePropertySet* presentationAttributeStyle();
virtual bool isPresentationAttribute(const QualifiedName&) const { return false; }
virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) { }
// For exposing to DOM only.
NamedNodeMap* attributes() const;
enum AttributeModificationReason {
// This method is called whenever an attribute is added, changed or removed.
virtual void attributeChanged(const QualifiedName&, const AtomicString&, AttributeModificationReason = ModifiedDirectly);
virtual void parseAttribute(const QualifiedName&, const AtomicString&) { }
// Only called by the parser immediately after element construction.
void parserSetAttributes(const Vector<Attribute>&);
// Remove attributes that might introduce scripting from the vector leaving the element unchanged.
void stripScriptingAttributes(Vector<Attribute>&) const;
const ElementData* elementData() const { return m_elementData.get(); }
UniqueElementData* ensureUniqueElementData();
void synchronizeAllAttributes() const;
// Clones attributes only.
void cloneAttributesFromElement(const Element&);
// Clones all attribute-derived data, including subclass specifics (through copyNonAttributeProperties.)
void cloneDataFromElement(const Element&);
bool hasEquivalentAttributes(const Element* other) const;
virtual void copyNonAttributePropertiesFromElement(const Element&) { }
virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
virtual void detach(const AttachContext& = AttachContext()) OVERRIDE;
virtual RenderObject* createRenderer(RenderStyle*);
virtual bool rendererIsNeeded(const RenderStyle&);
bool recalcStyle(StyleRecalcChange);
void didAffectSelector(AffectedSelectorMask);
bool supportsStyleSharing() const;
ElementShadow* shadow() const;
ElementShadow& ensureShadow();
PassRefPtr<ShadowRoot> createShadowRoot(ExceptionState&);
ShadowRoot* shadowRoot() const;
bool hasAuthorShadowRoot() const { return shadowRoot(); }
virtual void didAddShadowRoot(ShadowRoot&);
ShadowRoot* userAgentShadowRoot() const;
ShadowRoot* ensureUserAgentShadowRoot();
const AtomicString& shadowPseudoId() const;
RenderStyle* computedStyle(PseudoId = NOPSEUDO);
// Methods for indicating the style is affected by dynamic updates (e.g., children changing, our position changing in our sibling list, etc.)
bool styleAffectedByEmpty() const { return hasRareData() && rareDataStyleAffectedByEmpty(); }
bool childrenAffectedByHover() const { return hasRareData() && rareDataChildrenAffectedByHover(); }
bool childrenAffectedByActive() const { return hasRareData() && rareDataChildrenAffectedByActive(); }
bool childrenAffectedByDrag() const { return hasRareData() && rareDataChildrenAffectedByDrag(); }
bool childrenAffectedByPositionalRules() const { return hasRareData() && (rareDataChildrenAffectedByForwardPositionalRules() || rareDataChildrenAffectedByBackwardPositionalRules()); }
bool childrenAffectedByFirstChildRules() const { return hasRareData() && rareDataChildrenAffectedByFirstChildRules(); }
bool childrenAffectedByLastChildRules() const { return hasRareData() && rareDataChildrenAffectedByLastChildRules(); }
bool childrenAffectedByDirectAdjacentRules() const { return hasRareData() && rareDataChildrenAffectedByDirectAdjacentRules(); }
bool childrenAffectedByForwardPositionalRules() const { return hasRareData() && rareDataChildrenAffectedByForwardPositionalRules(); }
bool childrenAffectedByBackwardPositionalRules() const { return hasRareData() && rareDataChildrenAffectedByBackwardPositionalRules(); }
unsigned childIndex() const { return hasRareData() ? rareDataChildIndex() : 0; }
bool childrenSupportStyleSharing() const;
void setStyleAffectedByEmpty();
void setChildrenAffectedByHover(bool);
void setChildrenAffectedByActive(bool);
void setChildrenAffectedByDrag(bool);
void setChildrenAffectedByFirstChildRules();
void setChildrenAffectedByLastChildRules();
void setChildrenAffectedByDirectAdjacentRules();
void setChildrenAffectedByForwardPositionalRules();
void setChildrenAffectedByBackwardPositionalRules();
void setChildIndex(unsigned);
void setIsInCanvasSubtree(bool);
bool isInCanvasSubtree() const;
bool isUpgradedCustomElement() { return customElementState() == Upgraded; }
bool isUnresolvedCustomElement() { return isCustomElement() && !isUpgradedCustomElement(); }
void setIsInsideRegion(bool);
bool isInsideRegion() const;
void setRegionOversetState(RegionOversetState);
RegionOversetState regionOversetState() const;
AtomicString computeInheritedLanguage() const;
Locale& locale() const;
virtual void accessKeyAction(bool /*sendToAnyEvent*/) { }
virtual bool isURLAttribute(const Attribute&) const { return false; }
virtual bool isHTMLContentAttribute(const Attribute&) const { return false; }
KURL getURLAttribute(const QualifiedName&) const;
KURL getNonEmptyURLAttribute(const QualifiedName&) const;
virtual const AtomicString imageSourceURL() const;
virtual String target() const { return String(); }
virtual Image* imageContents() { return 0; }
virtual void focus(bool restorePreviousSelection = true, FocusDirection = FocusDirectionNone);
virtual void updateFocusAppearance(bool restorePreviousSelection);
virtual void blur();
// Whether this element can receive focus at all. Most elements are not
// focusable but some elements, such as form controls and links, are. Unlike
// rendererIsFocusable(), this method may be called when layout is not up to
// date, so it must not use the renderer to determine focusability.
virtual bool supportsFocus() const;
// Whether the node can actually be focused.
bool isFocusable() const;
virtual bool isKeyboardFocusable() const;
virtual bool isMouseFocusable() const;
virtual void dispatchFocusEvent(Element* oldFocusedElement, FocusDirection);
virtual void dispatchBlurEvent(Element* newFocusedElement);
void dispatchFocusInEvent(const AtomicString& eventType, Element* oldFocusedElement);
void dispatchFocusOutEvent(const AtomicString& eventType, Element* newFocusedElement);
String innerText();
String outerText();
String textFromChildren();
virtual String title() const { return String(); }
const AtomicString& pseudo() const;
virtual const AtomicString& part() const;
void setPart(const AtomicString&);
LayoutSize minimumSizeForResizing() const;
void setMinimumSizeForResizing(const LayoutSize&);
virtual void didBecomeFullscreenElement() { }
virtual void willStopBeingFullscreenElement() { }
bool isFinishedParsingChildren() const { return isParsingChildrenFinished(); }
virtual void finishParsingChildren();
virtual void beginParsingChildren() OVERRIDE FINAL;
PseudoElement* pseudoElement(PseudoId) const;
RenderObject* pseudoElementRenderer(PseudoId) const;
virtual bool matchesReadOnlyPseudoClass() const { return false; }
virtual bool matchesReadWritePseudoClass() const { return false; }
bool webkitMatchesSelector(const String& selectors, ExceptionState&);
virtual bool shouldAppearIndeterminate() const { return false; }
DOMTokenList* classList();
DOMStringMap* dataset();
virtual bool isMediaElement() const { return false; }
virtual bool isInputFieldSpeechButtonElement() const { return false; }
virtual bool isDateTimeEditElement() const { return false; }
virtual bool isDateTimeFieldElement() const { return false; }
virtual bool isPickerIndicatorElement() const { return false; }
virtual bool isFormControlElement() const { return false; }
virtual bool isSpinButtonElement() const { return false; }
virtual bool isTextFormControl() const { return false; }
virtual bool isOptionalFormControl() const { return false; }
virtual bool isRequiredFormControl() const { return false; }
virtual bool isDefaultButtonForForm() const { return false; }
virtual bool willValidate() const { return false; }
virtual bool isValidFormControlElement() { return false; }
virtual bool isInRange() const { return false; }
virtual bool isOutOfRange() const { return false; }
virtual bool isFrameElementBase() const { return false; }
virtual bool isPasswordGeneratorButtonElement() const { return false; }
virtual bool isClearButtonElement() const { return false; }
virtual bool canContainRangeEndPoint() const { return true; }
virtual const AtomicString& formControlType() const { return nullAtom; }
// FIXME: Only HTMLInputElement uses these, they don't need to be virtual.
virtual bool wasChangedSinceLastFormControlChangeEvent() const { return false; }
virtual void setChangedSinceLastFormControlChangeEvent(bool) { }
virtual void dispatchFormControlChangeEvent() { }
// Used for disabled form elements; if true, prevents mouse events from being dispatched
// to event listeners, and prevents DOMActivate events from being sent at all.
virtual bool isDisabledFormControl() const { return false; }
virtual bool shouldBeReparentedUnderRenderView(const RenderStyle*) const { return isInTopLayer(); }
virtual bool childShouldCreateRenderer(const Node& child) const;
bool hasPendingResources() const;
void setHasPendingResources();
void clearHasPendingResources();
virtual void buildPendingResource() { };
enum {
void webkitRequestFullScreen(unsigned short flags);
bool containsFullScreenElement() const;
void setContainsFullScreenElement(bool);
void setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(bool);
// W3C API
void webkitRequestFullscreen();
bool isInTopLayer() const;
void setIsInTopLayer(bool);
void webkitRequestPointerLock();
bool isSpellCheckingEnabled() const;
PassRefPtr<RenderStyle> styleForRenderer();
PassRefPtr<RenderStyle> originalStyleForRenderer();
RenderRegion* renderRegion() const;
virtual bool shouldMoveToFlowThread(RenderStyle*) const;
const AtomicString& webkitRegionOverset() const;
Vector<RefPtr<Range> > webkitGetRegionFlowRanges() const;
bool hasID() const;
bool hasClass() const;
const SpaceSplitString& classNames() const;
IntSize savedLayerScrollOffset() const;
void setSavedLayerScrollOffset(const IntSize&);
ActiveAnimations* activeAnimations() const;
ActiveAnimations* ensureActiveAnimations();
bool hasActiveAnimations() const;
InputMethodContext* inputMethodContext();
virtual void setPrefix(const AtomicString&, ExceptionState&) OVERRIDE FINAL;
Element(const QualifiedName& tagName, Document* document, ConstructionType type)
: ContainerNode(document, type)
, m_tagName(tagName)
void addPropertyToPresentationAttributeStyle(MutableStylePropertySet*, CSSPropertyID, CSSValueID identifier);
void addPropertyToPresentationAttributeStyle(MutableStylePropertySet*, CSSPropertyID, double value, CSSPrimitiveValue::UnitTypes);
void addPropertyToPresentationAttributeStyle(MutableStylePropertySet*, CSSPropertyID, const String& value);
virtual void addSubresourceAttributeURLs(ListHashSet<KURL>&) const;
virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
virtual void removedFrom(ContainerNode*) OVERRIDE;
virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0) OVERRIDE;
virtual void removeAllEventListeners() OVERRIDE;
virtual void willRecalcStyle(StyleRecalcChange);
virtual void didRecalcStyle(StyleRecalcChange);
virtual PassRefPtr<RenderStyle> customStyleForRenderer();
virtual bool shouldRegisterAsNamedItem() const { return false; }
virtual bool shouldRegisterAsExtraNamedItem() const { return false; }
void clearTabIndexExplicitlyIfNeeded();
void setTabIndexExplicitly(short);
virtual short tabIndex() const OVERRIDE;
// Subclasses may override this method to affect focusability. Unlike
// supportsFocus, this method must be called on an up-to-date layout, so it
// may use the renderer to reason about focusability. This method cannot be
// moved to RenderObject because some focusable nodes don't have renderers,
// e.g., HTMLOptionElement.
virtual bool rendererIsFocusable() const;
PassRefPtr<HTMLCollection> ensureCachedHTMLCollection(CollectionType);
HTMLCollection* cachedHTMLCollection(CollectionType);
// classAttributeChanged() exists to share code between
// parseAttribute (called via setAttribute()) and
// svgAttributeChanged (called when element.className.baseValue is set)
void classAttributeChanged(const AtomicString& newClassString);
void styleAttributeChanged(const AtomicString& newStyleString, AttributeModificationReason);
void updatePresentationAttributeStyle();
void inlineStyleChanged();
PropertySetCSSStyleDeclaration* inlineStyleCSSOMWrapper();
void setInlineStyleFromString(const AtomicString&);
MutableStylePropertySet* ensureMutableInlineStyle();
StyleRecalcChange recalcOwnStyle(StyleRecalcChange);
void recalcChildStyle(StyleRecalcChange);
void updatePseudoElement(PseudoId, StyleRecalcChange);
inline void createPseudoElementIfNeeded(PseudoId);
inline bool needsPseudoElement(PseudoId) const;
void createPseudoElement(PseudoId);
// FIXME: Everyone should allow author shadows.
virtual bool areAuthorShadowsAllowed() const { return true; }
virtual void didAddUserAgentShadowRoot(ShadowRoot*) { }
virtual bool alwaysCreateUserAgentShadowRoot() const { return false; }
// FIXME: Remove the need for Attr to call willModifyAttribute/didModifyAttribute.
friend class Attr;
enum SynchronizationOfLazyAttribute { NotInSynchronizationOfLazyAttribute = 0, InSynchronizationOfLazyAttribute };
void didAddAttribute(const QualifiedName&, const AtomicString&);
void willModifyAttribute(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue);
void didModifyAttribute(const QualifiedName&, const AtomicString&);
void didRemoveAttribute(const QualifiedName&);
void synchronizeAttribute(const QualifiedName&) const;
void synchronizeAttribute(const AtomicString& localName) const;
void updateId(const AtomicString& oldId, const AtomicString& newId);
void updateId(TreeScope&, const AtomicString& oldId, const AtomicString& newId);
void updateName(const AtomicString& oldName, const AtomicString& newName);
void updateLabel(TreeScope&, const AtomicString& oldForAttributeValue, const AtomicString& newForAttributeValue);
void scrollByUnits(int units, ScrollGranularity);
virtual NodeType nodeType() const OVERRIDE FINAL;
virtual bool childTypeAllowed(NodeType) const OVERRIDE FINAL;
void setAttributeInternal(size_t index, const QualifiedName&, const AtomicString& value, SynchronizationOfLazyAttribute);
void addAttributeInternal(const QualifiedName&, const AtomicString& value, SynchronizationOfLazyAttribute);
void removeAttributeInternal(size_t index, SynchronizationOfLazyAttribute);
void attributeChangedFromParserOrByCloning(const QualifiedName&, const AtomicString&, AttributeModificationReason);
#ifndef NDEBUG
virtual void formatForDebugger(char* buffer, unsigned length) const;
bool pseudoStyleCacheIsInvalid(const RenderStyle* currentStyle, RenderStyle* newStyle);
void cancelFocusAppearanceUpdate();
virtual RenderStyle* virtualComputedStyle(PseudoId pseudoElementSpecifier = NOPSEUDO) { return computedStyle(pseudoElementSpecifier); }
void updateCallbackSelectors(RenderStyle* oldStyle, RenderStyle* newStyle);
// cloneNode is private so that non-virtual cloneElementWithChildren and cloneElementWithoutChildren
// are used instead.
virtual PassRefPtr<Node> cloneNode(bool deep) OVERRIDE;
virtual PassRefPtr<Element> cloneElementWithoutAttributesAndChildren();
QualifiedName m_tagName;
bool rareDataStyleAffectedByEmpty() const;
bool rareDataChildrenAffectedByHover() const;
bool rareDataChildrenAffectedByActive() const;
bool rareDataChildrenAffectedByDrag() const;
bool rareDataChildrenAffectedByFirstChildRules() const;
bool rareDataChildrenAffectedByLastChildRules() const;
bool rareDataChildrenAffectedByDirectAdjacentRules() const;
bool rareDataChildrenAffectedByForwardPositionalRules() const;
bool rareDataChildrenAffectedByBackwardPositionalRules() const;
unsigned rareDataChildIndex() const;
SpellcheckAttributeState spellcheckAttributeState() const;
void updateNamedItemRegistration(const AtomicString& oldName, const AtomicString& newName);
void updateExtraNamedItemRegistration(const AtomicString& oldName, const AtomicString& newName);
void unregisterNamedFlowContentNode();
void createUniqueElementData();
bool shouldInvalidateDistributionWhenAttributeChanged(ElementShadow*, const QualifiedName&, const AtomicString&);
ElementRareData* elementRareData() const;
ElementRareData& ensureElementRareData();
void detachAllAttrNodesFromElement();
void detachAttrNodeFromElementWithValue(Attr*, const AtomicString& value);
void detachAttrNodeAtIndex(Attr*, size_t index);
bool isJavaScriptURLAttribute(const Attribute&) const;
RefPtr<ElementData> m_elementData;
DEFINE_NODE_TYPE_CASTS(Element, isElementNode());
inline bool isDisabledFormControl(const Node* node)
return node->isElementNode() && toElement(node)->isDisabledFormControl();
inline bool Node::hasTagName(const QualifiedName& name) const
return isElementNode() && toElement(this)->hasTagName(name);
inline Element* Node::parentElement() const
ContainerNode* parent = parentNode();
return parent && parent->isElementNode() ? toElement(parent) : 0;
inline Element* Node::previousElementSibling() const
Node* n = previousSibling();
while (n && !n->isElementNode())
n = n->previousSibling();
return toElement(n);
inline Element* Node::nextElementSibling() const
Node* n = nextSibling();
while (n && !n->isElementNode())
n = n->nextSibling();
return toElement(n);
inline bool Element::fastHasAttribute(const QualifiedName& name) const
return elementData() && getAttributeItem(name);
inline const AtomicString& Element::fastGetAttribute(const QualifiedName& name) const
if (elementData()) {
if (const Attribute* attribute = getAttributeItem(name))
return attribute->value();
return nullAtom;
inline bool Element::hasAttributesWithoutUpdate() const
return elementData() && !elementData()->isEmpty();
inline const AtomicString& Element::idForStyleResolution() const
return elementData()->idForStyleResolution();
inline const AtomicString& Element::shadowPseudoId() const
// FIXME: We should remove both part() and pseudo(), neither are in the new spec.
const AtomicString& part = this->part();
if (!part.isEmpty())
return part;
return pseudo();
inline bool Element::isIdAttributeName(const QualifiedName& attributeName) const
// FIXME: This check is probably not correct for the case where the document has an id attribute
// with a non-null namespace, because it will return false, a false negative, if the prefixes
// don't match but the local name and namespace both do. However, since this has been like this
// for a while and the code paths may be hot, we'll have to measure performance if we fix it.
return attributeName == document().idAttributeName();
inline const AtomicString& Element::getIdAttribute() const
return hasID() ? fastGetAttribute(document().idAttributeName()) : nullAtom;
inline const AtomicString& Element::getNameAttribute() const
return hasName() ? fastGetAttribute(HTMLNames::nameAttr) : nullAtom;
inline const AtomicString& Element::getClassAttribute() const
if (!hasClass())
return nullAtom;
if (isSVGElement())
return getAttribute(HTMLNames::classAttr);
return fastGetAttribute(HTMLNames::classAttr);
inline bool Element::shouldIgnoreAttributeCase() const
return isHTMLElement() && document().isHTMLDocument();
inline void Element::setIdAttribute(const AtomicString& value)
setAttribute(document().idAttributeName(), value);
inline const SpaceSplitString& Element::classNames() const
return elementData()->classNames();
inline size_t Element::attributeCount() const
return elementData()->length();
inline const Attribute* Element::attributeItem(unsigned index) const
return elementData()->attributeItem(index);
inline const Attribute* Element::getAttributeItem(const QualifiedName& name) const
return elementData()->getAttributeItem(name);
inline bool Element::hasID() const
return elementData() && elementData()->hasID();
inline bool Element::hasClass() const
return elementData() && elementData()->hasClass();
inline UniqueElementData* Element::ensureUniqueElementData()
if (!elementData() || !elementData()->isUnique())
return static_cast<UniqueElementData*>(m_elementData.get());
// Put here to make them inline.
inline bool Node::hasID() const
return isElementNode() && toElement(this)->hasID();
inline bool Node::hasClass() const
return isElementNode() && toElement(this)->hasClass();
inline Node::InsertionNotificationRequest Node::insertedInto(ContainerNode* insertionPoint)
ASSERT(insertionPoint->inDocument() || isContainerNode());
if (insertionPoint->inDocument())
if (parentOrShadowHostNode()->isInShadowTree())
if (childNeedsDistributionRecalc() && !insertionPoint->childNeedsDistributionRecalc())
return InsertionDone;
inline void Node::removedFrom(ContainerNode* insertionPoint)
ASSERT(insertionPoint->inDocument() || isContainerNode());
if (insertionPoint->inDocument())
if (isInShadowTree() && !treeScope().rootNode()->isShadowRoot())
inline void Element::invalidateStyleAttribute()
elementData()->m_styleAttributeIsDirty = true;
inline const StylePropertySet* Element::presentationAttributeStyle()
if (!elementData())
return 0;
if (elementData()->m_presentationAttributeStyleIsDirty)
// Need to call elementData() again since updatePresentationAttributeStyle()
// might swap it with a UniqueElementData.
return elementData()->presentationAttributeStyle();
inline bool isShadowHost(const Node* node)
return node && node->isElementNode() && toElement(node)->shadow();
inline bool isShadowHost(const Element* element)
return element && element->shadow();
} // namespace