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webkit / WebKit / ba181c4f3780460fd07d40b92718cbb6448ebd97 / . / Source / WebCore / dom / Element.cpp
blob: da570ba71598563f2aa962234dfd118abdcc4307 [file] [log] [blame]
/*
* 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, 2005, 2006, 2007, 2008, 2009, 2010 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 "CSSParser.h"
#include "CSSSelectorList.h"
#include "CSSStyleSelector.h"
#include "ClassList.h"
#include "ClientRect.h"
#include "ClientRectList.h"
#include "DOMTokenList.h"
#include "DatasetDOMStringMap.h"
#include "Document.h"
#include "DocumentFragment.h"
#include "ElementRareData.h"
#include "ExceptionCode.h"
#include "FocusController.h"
#include "Frame.h"
#include "FrameView.h"
#include "HTMLCollection.h"
#include "HTMLDocument.h"
#include "HTMLElement.h"
#include "HTMLFrameOwnerElement.h"
#include "HTMLNames.h"
#include "HTMLParserIdioms.h"
#include "InspectorInstrumentation.h"
#include "MutationObserverInterestGroup.h"
#include "MutationRecord.h"
#include "NamedNodeMap.h"
#include "NodeList.h"
#include "NodeRenderStyle.h"
#include "NodeRenderingContext.h"
#include "Page.h"
#include "RenderLayer.h"
#include "RenderRegion.h"
#include "RenderView.h"
#include "RenderWidget.h"
#include "RuntimeEnabledFeatures.h"
#include "Settings.h"
#include "ShadowRoot.h"
#include "Text.h"
#include "TextIterator.h"
#include "WebKitMutationObserver.h"
#include "WebKitAnimationList.h"
#include "XMLNSNames.h"
#include "XMLNames.h"
#include "htmlediting.h"
#include <wtf/text/CString.h>
#if ENABLE(SVG)
#include "SVGElement.h"
#include "SVGNames.h"
#endif
namespace WebCore {
using namespace HTMLNames;
using namespace XMLNames;
class StyleSelectorParentPusher {
public:
StyleSelectorParentPusher(Element* parent)
: m_parent(parent)
, m_pushedStyleSelector(0)
{
}
void push()
{
if (m_pushedStyleSelector)
return;
m_pushedStyleSelector = m_parent->document()->styleSelector();
m_pushedStyleSelector->pushParentElement(m_parent);
}
~StyleSelectorParentPusher()
{
if (!m_pushedStyleSelector)
return;
// This tells us that our pushed style selector is in a bad state,
// so we should just bail out in that scenario.
ASSERT(m_pushedStyleSelector == m_parent->document()->styleSelector());
if (m_pushedStyleSelector != m_parent->document()->styleSelector())
return;
m_pushedStyleSelector->popParentElement(m_parent);
}
private:
Element* m_parent;
CSSStyleSelector* m_pushedStyleSelector;
};
PassRefPtr<Element> Element::create(const QualifiedName& tagName, Document* document)
{
return adoptRef(new Element(tagName, document, CreateElement));
}
Element::~Element()
{
if (shadowTree())
rareData()->m_shadowTree.clear();
if (m_attributeData)
m_attributeData->clearAttributes();
}
inline ElementRareData* Element::rareData() const
{
ASSERT(hasRareData());
return static_cast<ElementRareData*>(NodeRareData::rareDataFromMap(this));
}
inline ElementRareData* Element::ensureRareData()
{
return static_cast<ElementRareData*>(Node::ensureRareData());
}
OwnPtr<NodeRareData> Element::createRareData()
{
return adoptPtr(new ElementRareData);
}
DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(Element, blur);
DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(Element, error);
DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(Element, focus);
DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(Element, load);
PassRefPtr<Node> Element::cloneNode(bool deep)
{
return deep ? cloneElementWithChildren() : cloneElementWithoutChildren();
}
PassRefPtr<Element> Element::cloneElementWithChildren()
{
RefPtr<Element> clone = cloneElementWithoutChildren();
cloneChildNodes(clone.get());
return clone.release();
}
PassRefPtr<Element> Element::cloneElementWithoutChildren()
{
RefPtr<Element> clone = cloneElementWithoutAttributesAndChildren();
// 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->setAttributesFromElement(*this);
clone->copyNonAttributeProperties(this);
return clone.release();
}
PassRefPtr<Element> Element::cloneElementWithoutAttributesAndChildren()
{
return document()->createElement(tagQName(), false);
}
void Element::copyNonAttributeProperties(const Element*)
{
}
void Element::removeAttribute(const QualifiedName& name)
{
if (!attributeData())
return;
attributeData()->removeAttribute(name, this);
}
void Element::setBooleanAttribute(const QualifiedName& name, bool value)
{
if (value)
setAttribute(name, emptyAtom);
else
removeAttribute(name);
}
NamedNodeMap* Element::attributes() const
{
ensureUpdatedAttributeData();
ElementRareData* rareData = const_cast<Element*>(this)->ensureRareData();
if (NamedNodeMap* attributeMap = rareData->m_attributeMap.get())
return attributeMap;
rareData->m_attributeMap = NamedNodeMap::create(const_cast<Element*>(this));
return rareData->m_attributeMap.get();
}
Node::NodeType Element::nodeType() const
{
return ELEMENT_NODE;
}
bool Element::hasAttribute(const QualifiedName& name) const
{
return hasAttributeNS(name.namespaceURI(), name.localName());
}
const AtomicString& Element::getAttribute(const QualifiedName& name) const
{
if (UNLIKELY(name == styleAttr) && !isStyleAttributeValid())
updateStyleAttribute();
#if ENABLE(SVG)
if (UNLIKELY(!areSVGAttributesValid()))
updateAnimatedSVGAttribute(name);
#endif
if (m_attributeData) {
if (Attribute* attribute = getAttributeItem(name))
return attribute->value();
}
return nullAtom;
}
void Element::scrollIntoView(bool alignToTop)
{
document()->updateLayoutIgnorePendingStylesheets();
if (!renderer())
return;
LayoutRect bounds = getRect();
// Align to the top / bottom and to the closest edge.
if (alignToTop)
renderer()->enclosingLayer()->scrollRectToVisible(bounds, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignTopAlways);
else
renderer()->enclosingLayer()->scrollRectToVisible(bounds, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignBottomAlways);
}
void Element::scrollIntoViewIfNeeded(bool centerIfNeeded)
{
document()->updateLayoutIgnorePendingStylesheets();
if (!renderer())
return;
LayoutRect bounds = getRect();
if (centerIfNeeded)
renderer()->enclosingLayer()->scrollRectToVisible(bounds, ScrollAlignment::alignCenterIfNeeded, ScrollAlignment::alignCenterIfNeeded);
else
renderer()->enclosingLayer()->scrollRectToVisible(bounds, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignToEdgeIfNeeded);
}
void Element::scrollByUnits(int units, ScrollGranularity granularity)
{
document()->updateLayoutIgnorePendingStylesheets();
if (!renderer())
return;
if (!renderer()->hasOverflowClip())
return;
ScrollDirection direction = ScrollDown;
if (units < 0) {
direction = ScrollUp;
units = -units;
}
toRenderBox(renderer())->layer()->scroll(direction, granularity, units);
}
void Element::scrollByLines(int lines)
{
scrollByUnits(lines, ScrollByLine);
}
void Element::scrollByPages(int pages)
{
scrollByUnits(pages, ScrollByPage);
}
static float localZoomForRenderer(RenderObject* 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).
float zoomFactor = 1;
if (renderer->style()->effectiveZoom() != 1) {
// Need to find the nearest enclosing RenderObject that set up
// a differing zoom, and then we divide our result by it to eliminate the zoom.
RenderObject* prev = renderer;
for (RenderObject* 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 LayoutUnit adjustForLocalZoom(LayoutUnit value, RenderObject* renderer)
{
float zoomFactor = localZoomForRenderer(renderer);
if (zoomFactor == 1)
return value;
// Needed because computeLengthInt truncates (rather than rounds) when scaling up.
if (zoomFactor > 1)
value++;
return static_cast<LayoutUnit>(value / zoomFactor);
}
int Element::offsetLeft()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* rend = renderBoxModelObject())
return adjustForLocalZoom(rend->offsetLeft(), rend);
return 0;
}
int Element::offsetTop()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* rend = renderBoxModelObject())
return adjustForLocalZoom(rend->offsetTop(), rend);
return 0;
}
int Element::offsetWidth()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* rend = renderBoxModelObject())
return adjustForAbsoluteZoom(rend->offsetWidth(), rend);
return 0;
}
int Element::offsetHeight()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* rend = renderBoxModelObject())
return adjustForAbsoluteZoom(rend->offsetHeight(), rend);
return 0;
}
Element* Element::offsetParent()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject* rend = renderer())
if (RenderObject* offsetParent = rend->offsetParent())
return static_cast<Element*>(offsetParent->node());
return 0;
}
int Element::clientLeft()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->clientLeft(), rend);
return 0;
}
int Element::clientTop()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->clientTop(), rend);
return 0;
}
int Element::clientWidth()
{
document()->updateLayoutIgnorePendingStylesheets();
// 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()->body() == this)) {
if (FrameView* view = document()->view()) {
if (RenderView* renderView = document()->renderView())
return adjustForAbsoluteZoom(view->layoutWidth(), renderView);
}
}
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->clientWidth(), rend);
return 0;
}
int Element::clientHeight()
{
document()->updateLayoutIgnorePendingStylesheets();
// 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()->body() == this)) {
if (FrameView* view = document()->view()) {
if (RenderView* renderView = document()->renderView())
return adjustForAbsoluteZoom(view->layoutHeight(), renderView);
}
}
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->clientHeight(), rend);
return 0;
}
int Element::scrollLeft()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollLeft(), rend);
return 0;
}
int Element::scrollTop()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollTop(), rend);
return 0;
}
void Element::setScrollLeft(int newLeft)
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
rend->setScrollLeft(static_cast<int>(newLeft * rend->style()->effectiveZoom()));
}
void Element::setScrollTop(int newTop)
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
rend->setScrollTop(static_cast<int>(newTop * rend->style()->effectiveZoom()));
}
int Element::scrollWidth()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollWidth(), rend);
return 0;
}
int Element::scrollHeight()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollHeight(), rend);
return 0;
}
IntRect Element::boundsInRootViewSpace()
{
document()->updateLayoutIgnorePendingStylesheets();
FrameView* view = document()->view();
if (!view)
return IntRect();
Vector<FloatQuad> quads;
#if ENABLE(SVG)
if (isSVGElement() && renderer()) {
// Get the bounding rectangle from the SVG model.
SVGElement* svgElement = static_cast<SVGElement*>(this);
FloatRect localRect;
if (svgElement->boundingBox(localRect))
quads.append(renderer()->localToAbsoluteQuad(localRect));
} else
#endif
{
// Get the bounding rectangle from the box model.
if (renderBoxModelObject())
renderBoxModelObject()->absoluteQuads(quads);
}
if (quads.isEmpty())
return IntRect();
IntRect result = quads[0].enclosingBoundingBox();
for (size_t i = 1; i < quads.size(); ++i)
result.unite(quads[i].enclosingBoundingBox());
result = view->contentsToRootView(result);
return result;
}
PassRefPtr<ClientRectList> Element::getClientRects()
{
document()->updateLayoutIgnorePendingStylesheets();
RenderBoxModelObject* renderBoxModelObject = this->renderBoxModelObject();
if (!renderBoxModelObject)
return ClientRectList::create();
// FIXME: Handle SVG elements.
// FIXME: Handle table/inline-table with a caption.
Vector<FloatQuad> quads;
renderBoxModelObject->absoluteQuads(quads);
float pageScale = 1;
if (Page* page = document()->page())
pageScale = page->pageScaleFactor();
if (FrameView* view = document()->view()) {
LayoutRect visibleContentRect = view->visibleContentRect();
for (size_t i = 0; i < quads.size(); ++i) {
quads[i].move(-visibleContentRect.x(), -visibleContentRect.y());
adjustFloatQuadForAbsoluteZoom(quads[i], renderBoxModelObject);
if (pageScale != 1)
adjustFloatQuadForPageScale(quads[i], pageScale);
}
}
return ClientRectList::create(quads);
}
PassRefPtr<ClientRect> Element::getBoundingClientRect()
{
document()->updateLayoutIgnorePendingStylesheets();
Vector<FloatQuad> quads;
#if ENABLE(SVG)
if (isSVGElement() && renderer() && !renderer()->isSVGRoot()) {
// Get the bounding rectangle from the SVG model.
SVGElement* svgElement = static_cast<SVGElement*>(this);
FloatRect localRect;
if (svgElement->boundingBox(localRect))
quads.append(renderer()->localToAbsoluteQuad(localRect));
} else
#endif
{
// Get the bounding rectangle from the box model.
if (renderBoxModelObject())
renderBoxModelObject()->absoluteQuads(quads);
}
if (quads.isEmpty())
return ClientRect::create();
FloatRect result = quads[0].boundingBox();
for (size_t i = 1; i < quads.size(); ++i)
result.unite(quads[i].boundingBox());
if (FrameView* view = document()->view()) {
LayoutRect visibleContentRect = view->visibleContentRect();
result.move(-visibleContentRect.x(), -visibleContentRect.y());
}
adjustFloatRectForAbsoluteZoom(result, renderer());
if (Page* page = document()->page())
adjustFloatRectForPageScale(result, page->pageScaleFactor());
return ClientRect::create(result);
}
IntRect Element::screenRect() const
{
if (!renderer())
return IntRect();
// FIXME: this should probably respect transforms
return renderer()->view()->frameView()->contentsToScreen(renderer()->absoluteBoundingBoxRectIgnoringTransforms());
}
static inline bool shouldIgnoreAttributeCase(const Element* e)
{
return e && e->document()->isHTMLDocument() && e->isHTMLElement();
}
const AtomicString& Element::getAttribute(const String& name) const
{
bool ignoreCase = shouldIgnoreAttributeCase(this);
// Update the 'style' attribute if it's invalid and being requested:
if (!isStyleAttributeValid() && equalPossiblyIgnoringCase(name, styleAttr.localName(), ignoreCase))
updateStyleAttribute();
#if ENABLE(SVG)
if (!areSVGAttributesValid()) {
// We're not passing a namespace argument on purpose. SVGNames::*Attr are defined w/o namespaces as well.
updateAnimatedSVGAttribute(QualifiedName(nullAtom, name, nullAtom));
}
#endif
if (m_attributeData) {
if (Attribute* attribute = m_attributeData->getAttributeItem(name, ignoreCase))
return attribute->value();
}
return nullAtom;
}
const AtomicString& Element::getAttributeNS(const String& namespaceURI, const String& localName) const
{
return getAttribute(QualifiedName(nullAtom, localName, namespaceURI));
}
void Element::setAttribute(const AtomicString& name, const AtomicString& value, ExceptionCode& ec)
{
if (!Document::isValidName(name)) {
ec = INVALID_CHARACTER_ERR;
return;
}
const AtomicString& localName = shouldIgnoreAttributeCase(this) ? name.lower() : name;
size_t index = ensureUpdatedAttributeData()->getAttributeItemIndex(localName, false);
const QualifiedName& qName = index != notFound ? attributeItem(index)->name() : QualifiedName(nullAtom, localName, nullAtom);
setAttributeInternal(index, qName, value, NotInUpdateStyleAttribute);
}
void Element::setAttribute(const QualifiedName& name, const AtomicString& value, EInUpdateStyleAttribute inUpdateStyleAttribute)
{
setAttributeInternal(ensureUpdatedAttributeData()->getAttributeItemIndex(name), name, value, inUpdateStyleAttribute);
}
inline void Element::setAttributeInternal(size_t index, const QualifiedName& name, const AtomicString& value, EInUpdateStyleAttribute inUpdateStyleAttribute)
{
Attribute* old = index != notFound ? m_attributeData->attributeItem(index) : 0;
if (value.isNull()) {
if (old)
m_attributeData->removeAttribute(index, this, inUpdateStyleAttribute);
return;
}
if (!old) {
m_attributeData->addAttribute(Attribute::create(name, value), this, inUpdateStyleAttribute);
return;
}
if (inUpdateStyleAttribute == NotInUpdateStyleAttribute)
willModifyAttribute(name, old ? old->value() : nullAtom, value);
if (Attr* attrNode = old->attr())
attrNode->setValue(value);
else
old->setValue(value);
if (inUpdateStyleAttribute == NotInUpdateStyleAttribute)
didModifyAttribute(old);
}
void Element::attributeChanged(Attribute* attr)
{
document()->incDOMTreeVersion();
if (isIdAttributeName(attr->name()))
idAttributeChanged(attr);
else if (attr->name() == HTMLNames::nameAttr)
setHasName(!attr->isNull());
if (!needsStyleRecalc() && document()->attached()) {
CSSStyleSelector* styleSelector = document()->styleSelectorIfExists();
if (!styleSelector || styleSelector->hasSelectorForAttribute(attr->name().localName()))
setNeedsStyleRecalc();
}
invalidateNodeListsCacheAfterAttributeChanged(attr->name());
if (!AXObjectCache::accessibilityEnabled())
return;
const QualifiedName& attrName = attr->name();
if (attrName == aria_activedescendantAttr) {
// any change to aria-activedescendant attribute triggers accessibility focus change, but document focus remains intact
document()->axObjectCache()->handleActiveDescendantChanged(renderer());
} else if (attrName == roleAttr) {
// the role attribute can change at any time, and the AccessibilityObject must pick up these changes
document()->axObjectCache()->handleAriaRoleChanged(renderer());
} else if (attrName == aria_valuenowAttr) {
// If the valuenow attribute changes, AX clients need to be notified.
document()->axObjectCache()->postNotification(renderer(), AXObjectCache::AXValueChanged, true);
} else if (attrName == aria_labelAttr || attrName == aria_labeledbyAttr || attrName == altAttr || attrName == titleAttr) {
// If the content of an element changes due to an attribute change, notify accessibility.
document()->axObjectCache()->contentChanged(renderer());
} else if (attrName == aria_checkedAttr)
document()->axObjectCache()->checkedStateChanged(renderer());
else if (attrName == aria_selectedAttr)
document()->axObjectCache()->selectedChildrenChanged(renderer());
else if (attrName == aria_expandedAttr)
document()->axObjectCache()->handleAriaExpandedChange(renderer());
else if (attrName == aria_hiddenAttr)
document()->axObjectCache()->childrenChanged(renderer());
else if (attrName == aria_invalidAttr)
document()->axObjectCache()->postNotification(renderer(), AXObjectCache::AXInvalidStatusChanged, true);
}
void Element::idAttributeChanged(Attribute* attr)
{
if (attributeData()) {
if (attr->isNull())
attributeData()->setIdForStyleResolution(nullAtom);
else if (document()->inQuirksMode())
attributeData()->setIdForStyleResolution(attr->value().lower());
else
attributeData()->setIdForStyleResolution(attr->value());
}
setNeedsStyleRecalc();
}
// 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.
static bool isEventHandlerAttribute(const QualifiedName& name)
{
return name.namespaceURI().isNull() && name.localName().startsWith("on");
}
static bool isAttributeToRemove(const QualifiedName& name, const AtomicString& value)
{
return (name.localName().endsWith(hrefAttr.localName()) || name == srcAttr || name == actionAttr) && protocolIsJavaScript(stripLeadingAndTrailingHTMLSpaces(value));
}
void Element::parserSetAttributes(PassOwnPtr<AttributeVector> attributeVector, FragmentScriptingPermission scriptingPermission)
{
ASSERT(!inDocument());
ASSERT(!parentNode());
ASSERT(!m_attributeData);
if (!attributeVector)
return;
createAttributeData();
m_attributeData->m_attributes.swap(*attributeVector);
// If the element is created as result of a paste or drag-n-drop operation
// we want to remove all the script and event handlers.
if (scriptingPermission == FragmentScriptingNotAllowed) {
unsigned i = 0;
while (i < m_attributeData->length()) {
const QualifiedName& attributeName = m_attributeData->m_attributes[i]->name();
if (isEventHandlerAttribute(attributeName)) {
m_attributeData->m_attributes.remove(i);
continue;
}
if (isAttributeToRemove(attributeName, m_attributeData->m_attributes[i]->value()))
m_attributeData->m_attributes[i]->setValue(nullAtom);
i++;
}
}
// Store the set of attributes that changed on the stack in case
// attributeChanged mutates m_attributeData.
Vector<RefPtr<Attribute> > attributes;
m_attributeData->copyAttributesToVector(attributes);
for (Vector<RefPtr<Attribute> >::iterator iter = attributes.begin(); iter != attributes.end(); ++iter)
attributeChanged(iter->get());
}
bool Element::hasAttributes() const
{
updateInvalidAttributes();
return m_attributeData && m_attributeData->length();
}
bool Element::hasEquivalentAttributes(const Element* other) const
{
ElementAttributeData* attributeData = updatedAttributeData();
ElementAttributeData* otherAttributeData = other->updatedAttributeData();
if (attributeData)
return attributeData->isEquivalent(otherAttributeData);
if (otherAttributeData)
return otherAttributeData->isEquivalent(attributeData);
return true;
}
String Element::nodeName() const
{
return m_tagName.toString();
}
String Element::nodeNamePreservingCase() const
{
return m_tagName.toString();
}
void Element::setPrefix(const AtomicString& prefix, ExceptionCode& ec)
{
ec = 0;
checkSetPrefix(prefix, ec);
if (ec)
return;
m_tagName.setPrefix(prefix.isEmpty() ? AtomicString() : prefix);
}
KURL Element::baseURI() const
{
const AtomicString& baseAttribute = getAttribute(baseAttr);
KURL base(KURL(), baseAttribute);
if (!base.protocol().isEmpty())
return base;
ContainerNode* parent = parentNode();
if (!parent)
return base;
const KURL& parentBase = parent->baseURI();
if (parentBase.isNull())
return base;
return KURL(parentBase, baseAttribute);
}
void Element::createAttributeData() const
{
m_attributeData = ElementAttributeData::create();
}
bool Element::isURLAttribute(Attribute*) const
{
return false;
}
const QualifiedName& Element::imageSourceAttributeName() const
{
return srcAttr;
}
RenderObject* Element::createRenderer(RenderArena* arena, RenderStyle* style)
{
if (document()->documentElement() == this && style->display() == NONE) {
// Ignore display: none on root elements. Force a display of block in that case.
RenderBlock* result = new (arena) RenderBlock(this);
if (result)
result->setAnimatableStyle(style);
return result;
}
return RenderObject::createObject(this, style);
}
bool Element::wasChangedSinceLastFormControlChangeEvent() const
{
return false;
}
void Element::setChangedSinceLastFormControlChangeEvent(bool)
{
}
void Element::willRemove()
{
#if ENABLE(FULLSCREEN_API)
if (containsFullScreenElement())
setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(false);
#endif
if (ShadowTree* tree = shadowTree())
tree->willRemove();
ContainerNode::willRemove();
}
void Element::insertedIntoDocument()
{
// need to do superclass processing first so inDocument() is true
// by the time we reach updateId
ContainerNode::insertedIntoDocument();
if (ShadowTree* tree = shadowTree())
tree->insertedIntoDocument();
if (m_attributeData) {
if (hasID()) {
Attribute* idItem = getAttributeItem(document()->idAttributeName());
if (idItem && !idItem->isNull())
updateId(nullAtom, idItem->value());
}
if (hasName()) {
Attribute* nameItem = getAttributeItem(HTMLNames::nameAttr);
if (nameItem && !nameItem->isNull())
updateName(nullAtom, nameItem->value());
}
}
}
void Element::removedFromDocument()
{
setSavedLayerScrollOffset(IntSize());
if (m_attributeData) {
if (hasID()) {
Attribute* idItem = getAttributeItem(document()->idAttributeName());
if (idItem && !idItem->isNull())
updateId(idItem->value(), nullAtom);
}
if (hasName()) {
Attribute* nameItem = getAttributeItem(HTMLNames::nameAttr);
if (nameItem && !nameItem->isNull())
updateName(nameItem->value(), nullAtom);
}
}
ContainerNode::removedFromDocument();
if (ShadowTree* tree = shadowTree())
tree->removedFromDocument();
}
void Element::insertedIntoTree(bool deep)
{
ContainerNode::insertedIntoTree(deep);
if (!deep)
return;
if (ShadowTree* tree = shadowTree())
tree->insertedIntoTree(true);
#if ENABLE(FULLSCREEN_API)
if (containsFullScreenElement() && parentElement() && !parentElement()->containsFullScreenElement())
setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(true);
#endif
}
void Element::removedFromTree(bool deep)
{
ContainerNode::removedFromTree(deep);
if (!deep)
return;
if (ShadowTree* tree = shadowTree())
tree->removedFromTree(true);
}
void Element::attach()
{
suspendPostAttachCallbacks();
RenderWidget::suspendWidgetHierarchyUpdates();
createRendererIfNeeded();
StyleSelectorParentPusher parentPusher(this);
// When a shadow root exists, it does the work of attaching the children.
if (ShadowTree* tree = shadowTree()) {
parentPusher.push();
tree->attachHost(this);
} else {
if (firstChild())
parentPusher.push();
ContainerNode::attach();
}
if (hasRareData()) {
ElementRareData* data = rareData();
if (data->needsFocusAppearanceUpdateSoonAfterAttach()) {
if (isFocusable() && document()->focusedNode() == this)
document()->updateFocusAppearanceSoon(false /* don't restore selection */);
data->setNeedsFocusAppearanceUpdateSoonAfterAttach(false);
}
}
RenderWidget::resumeWidgetHierarchyUpdates();
resumePostAttachCallbacks();
}
void Element::detach()
{
RenderWidget::suspendWidgetHierarchyUpdates();
cancelFocusAppearanceUpdate();
if (hasRareData())
rareData()->resetComputedStyle();
if (ShadowTree* tree = shadowTree())
tree->detachHost(this);
else
ContainerNode::detach();
RenderWidget::resumeWidgetHierarchyUpdates();
}
bool Element::pseudoStyleCacheIsInvalid(const RenderStyle* currentStyle, RenderStyle* newStyle)
{
ASSERT(currentStyle == renderStyle());
if (!renderer() || !currentStyle)
return false;
const PseudoStyleCache* pseudoStyleCache = currentStyle->cachedPseudoStyles();
if (!pseudoStyleCache)
return false;
size_t cacheSize = pseudoStyleCache->size();
for (size_t i = 0; i < cacheSize; ++i) {
RefPtr<RenderStyle> newPseudoStyle;
PseudoId pseudoId = pseudoStyleCache->at(i)->styleType();
if (pseudoId == FIRST_LINE || pseudoId == FIRST_LINE_INHERITED)
newPseudoStyle = renderer()->uncachedFirstLineStyle(newStyle);
else
newPseudoStyle = renderer()->getUncachedPseudoStyle(pseudoId, newStyle, newStyle);
if (!newPseudoStyle)
return true;
if (*newPseudoStyle != *pseudoStyleCache->at(i)) {
if (pseudoId < FIRST_INTERNAL_PSEUDOID)
newStyle->setHasPseudoStyle(pseudoId);
newStyle->addCachedPseudoStyle(newPseudoStyle);
if (pseudoId == FIRST_LINE || pseudoId == FIRST_LINE_INHERITED) {
// FIXME: We should do an actual diff to determine whether a repaint vs. layout
// is needed, but for now just assume a layout will be required. The diff code
// in RenderObject::setStyle would need to be factored out so that it could be reused.
renderer()->setNeedsLayoutAndPrefWidthsRecalc();
}
return true;
}
}
return false;
}
PassRefPtr<RenderStyle> Element::customStyleForRenderer()
{
ASSERT_NOT_REACHED();
return 0;
}
PassRefPtr<RenderStyle> Element::styleForRenderer()
{
if (hasCustomStyleForRenderer())
return customStyleForRenderer();
return document()->styleSelector()->styleForElement(static_cast<Element*>(this));
}
void Element::recalcStyle(StyleChange change)
{
if (hasCustomWillOrDidRecalcStyle()) {
if (!willRecalcStyle(change))
return;
}
// Ref currentStyle in case it would otherwise be deleted when setRenderStyle() is called.
RefPtr<RenderStyle> currentStyle(renderStyle());
bool hasParentStyle = parentNodeForRenderingAndStyle() ? static_cast<bool>(parentNodeForRenderingAndStyle()->renderStyle()) : false;
bool hasDirectAdjacentRules = currentStyle && currentStyle->childrenAffectedByDirectAdjacentRules();
bool hasIndirectAdjacentRules = currentStyle && currentStyle->childrenAffectedByForwardPositionalRules();
if ((change > NoChange || needsStyleRecalc())) {
if (hasRareData()) {
ElementRareData* data = rareData();
data->resetComputedStyle();
data->m_styleAffectedByEmpty = false;
}
}
if (hasParentStyle && (change >= Inherit || needsStyleRecalc())) {
RefPtr<RenderStyle> newStyle = styleForRenderer();
StyleChange ch = Node::diff(currentStyle.get(), newStyle.get(), document());
if (ch == Detach || !currentStyle) {
// FIXME: The style gets computed twice by calling attach. We could do better if we passed the style along.
reattach();
// attach recalculates the style for all children. No need to do it twice.
clearNeedsStyleRecalc();
clearChildNeedsStyleRecalc();
if (hasCustomWillOrDidRecalcStyle())
didRecalcStyle(change);
return;
}
if (currentStyle) {
// Preserve "affected by" bits that were propagated to us from descendants in the case where we didn't do a full
// style change (e.g., only inline style changed).
if (currentStyle->affectedByHoverRules())
newStyle->setAffectedByHoverRules(true);
if (currentStyle->affectedByActiveRules())
newStyle->setAffectedByActiveRules(true);
if (currentStyle->affectedByDragRules())
newStyle->setAffectedByDragRules(true);
if (currentStyle->childrenAffectedByForwardPositionalRules())
newStyle->setChildrenAffectedByForwardPositionalRules();
if (currentStyle->childrenAffectedByBackwardPositionalRules())
newStyle->setChildrenAffectedByBackwardPositionalRules();
if (currentStyle->childrenAffectedByFirstChildRules())
newStyle->setChildrenAffectedByFirstChildRules();
if (currentStyle->childrenAffectedByLastChildRules())
newStyle->setChildrenAffectedByLastChildRules();
if (currentStyle->childrenAffectedByDirectAdjacentRules())
newStyle->setChildrenAffectedByDirectAdjacentRules();
}
if (ch != NoChange || pseudoStyleCacheIsInvalid(currentStyle.get(), newStyle.get()) || (change == Force && renderer() && renderer()->requiresForcedStyleRecalcPropagation())) {
setRenderStyle(newStyle);
} else if (needsStyleRecalc() && styleChangeType() != SyntheticStyleChange) {
// Although no change occurred, we use the new style so that the cousin style sharing code won't get
// fooled into believing this style is the same.
if (renderer())
renderer()->setStyleInternal(newStyle.get());
else
setRenderStyle(newStyle);
} else if (styleChangeType() == SyntheticStyleChange)
setRenderStyle(newStyle);
// If "rem" units are used anywhere in the document, and if the document element's font size changes, then go ahead and force font updating
// all the way down the tree. This is simpler than having to maintain a cache of objects (and such font size changes should be rare anyway).
if (document()->usesRemUnits() && document()->documentElement() == this && ch != NoChange && currentStyle && newStyle && currentStyle->fontSize() != newStyle->fontSize()) {
// Cached RenderStyles may depend on the rem units.
document()->styleSelector()->invalidateMatchedPropertiesCache();
change = Force;
}
if (change != Force) {
if (styleChangeType() == FullStyleChange)
change = Force;
else
change = ch;
}
}
StyleSelectorParentPusher parentPusher(this);
// FIXME: This check is good enough for :hover + foo, but it is not good enough for :hover + foo + bar.
// For now we will just worry about the common case, since it's a lot trickier to get the second case right
// without doing way too much re-resolution.
bool forceCheckOfNextElementSibling = false;
bool forceCheckOfAnyElementSibling = false;
for (Node *n = firstChild(); n; n = n->nextSibling()) {
if (n->isTextNode()) {
toText(n)->recalcTextStyle(change);
continue;
}
if (!n->isElementNode())
continue;
Element* element = static_cast<Element*>(n);
bool childRulesChanged = element->needsStyleRecalc() && element->styleChangeType() == FullStyleChange;
if ((forceCheckOfNextElementSibling || forceCheckOfAnyElementSibling))
element->setNeedsStyleRecalc();
if (change >= Inherit || element->childNeedsStyleRecalc() || element->needsStyleRecalc()) {
parentPusher.push();
element->recalcStyle(change);
}
forceCheckOfNextElementSibling = childRulesChanged && hasDirectAdjacentRules;
forceCheckOfAnyElementSibling = forceCheckOfAnyElementSibling || (childRulesChanged && hasIndirectAdjacentRules);
}
// FIXME: This does not care about sibling combinators. Will be necessary in XBL2 world.
if (hasShadowRoot()) {
ShadowTree* tree = shadowTree();
if (change >= Inherit || tree->childNeedsStyleRecalc() || tree->needsStyleRecalc()) {
parentPusher.push();
tree->recalcShadowTreeStyle(change);
}
}
clearNeedsStyleRecalc();
clearChildNeedsStyleRecalc();
if (hasCustomWillOrDidRecalcStyle())
didRecalcStyle(change);
}
bool Element::hasShadowRoot() const
{
if (ShadowTree* tree = shadowTree())
return tree->hasShadowRoot();
return false;
}
ShadowTree* Element::shadowTree() const
{
if (!hasRareData())
return 0;
return rareData()->m_shadowTree.get();
}
ShadowTree* Element::ensureShadowTree()
{
if (ShadowTree* tree = ensureRareData()->m_shadowTree.get())
return tree;
rareData()->m_shadowTree = adoptPtr(new ShadowTree());
return rareData()->m_shadowTree.get();
}
ShadowRoot* Element::ensureShadowRoot()
{
if (hasShadowRoot())
return shadowTree()->oldestShadowRoot();
return ShadowRoot::create(this, ShadowRoot::CreatingUserAgentShadowRoot).get();
}
const AtomicString& Element::shadowPseudoId() const
{
return hasRareData() ? rareData()->m_shadowPseudoId : nullAtom;
}
void Element::setShadowPseudoId(const AtomicString& id, ExceptionCode& ec)
{
if (!hasRareData() && id == nullAtom)
return;
if (!CSSSelector::isUnknownPseudoType(id)) {
ec = SYNTAX_ERR;
return;
}
ensureRareData()->m_shadowPseudoId = id;
}
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:
case ENTITY_REFERENCE_NODE:
return true;
default:
break;
}
return false;
}
static void checkForEmptyStyleChange(Element* element, RenderStyle* style)
{
if (!style && !element->styleAffectedByEmpty())
return;
if (!style || (style->affectedByEmpty() && (!style->emptyState() || element->hasChildNodes())))
element->setNeedsStyleRecalc();
}
static void checkForSiblingStyleChanges(Element* e, RenderStyle* style, bool finishedParsingCallback,
Node* beforeChange, Node* afterChange, int childCountDelta)
{
// :empty selector.
checkForEmptyStyleChange(e, style);
if (!style || (e->needsStyleRecalc() && style->childrenAffectedByPositionalRules()))
return;
// :first-child. In the parser callback case, we don't have to check anything, since we were right the first time.
// In the DOM case, we only need to do something if |afterChange| is not 0.
// |afterChange| is 0 in the parser case, so it works out that we'll skip this block.
if (style->childrenAffectedByFirstChildRules() && afterChange) {
// Find our new first child.
Node* newFirstChild = 0;
for (newFirstChild = e->firstChild(); newFirstChild && !newFirstChild->isElementNode(); newFirstChild = newFirstChild->nextSibling()) {};
// Find the first element node following |afterChange|
Node* firstElementAfterInsertion = 0;
for (firstElementAfterInsertion = afterChange;
firstElementAfterInsertion && !firstElementAfterInsertion->isElementNode();
firstElementAfterInsertion = firstElementAfterInsertion->nextSibling()) {};
// This is the insert/append case.
if (newFirstChild != firstElementAfterInsertion && firstElementAfterInsertion && firstElementAfterInsertion->attached() &&
firstElementAfterInsertion->renderStyle() && firstElementAfterInsertion->renderStyle()->firstChildState())
firstElementAfterInsertion->setNeedsStyleRecalc();
// We also have to handle node removal.
if (childCountDelta < 0 && newFirstChild == firstElementAfterInsertion && newFirstChild && newFirstChild->renderStyle() && !newFirstChild->renderStyle()->firstChildState())
newFirstChild->setNeedsStyleRecalc();
}
// :last-child. In the parser callback case, we don't have to check anything, since we were right the first time.
// In the DOM case, we only need to do something if |afterChange| is not 0.
if (style->childrenAffectedByLastChildRules() && beforeChange) {
// Find our new last child.
Node* newLastChild = 0;
for (newLastChild = e->lastChild(); newLastChild && !newLastChild->isElementNode(); newLastChild = newLastChild->previousSibling()) {};
// Find the last element node going backwards from |beforeChange|
Node* lastElementBeforeInsertion = 0;
for (lastElementBeforeInsertion = beforeChange;
lastElementBeforeInsertion && !lastElementBeforeInsertion->isElementNode();
lastElementBeforeInsertion = lastElementBeforeInsertion->previousSibling()) {};
if (newLastChild != lastElementBeforeInsertion && lastElementBeforeInsertion && lastElementBeforeInsertion->attached() &&
lastElementBeforeInsertion->renderStyle() && lastElementBeforeInsertion->renderStyle()->lastChildState())
lastElementBeforeInsertion->setNeedsStyleRecalc();
// We also have to handle node removal. The parser callback case is similar to node removal as well in that we need to change the last child
// to match now.
if ((childCountDelta < 0 || finishedParsingCallback) && newLastChild == lastElementBeforeInsertion && newLastChild && newLastChild->renderStyle() && !newLastChild->renderStyle()->lastChildState())
newLastChild->setNeedsStyleRecalc();
}
// The + selector. We need to invalidate the first element following the insertion point. It is the only possible element
// that could be affected by this DOM change.
if (style->childrenAffectedByDirectAdjacentRules() && afterChange) {
Node* firstElementAfterInsertion = 0;
for (firstElementAfterInsertion = afterChange;
firstElementAfterInsertion && !firstElementAfterInsertion->isElementNode();
firstElementAfterInsertion = firstElementAfterInsertion->nextSibling()) {};
if (firstElementAfterInsertion && firstElementAfterInsertion->attached())
firstElementAfterInsertion->setNeedsStyleRecalc();
}
// Forward positional selectors include the ~ selector, nth-child, nth-of-type, first-of-type and only-of-type.
// Backward positional selectors include nth-last-child, nth-last-of-type, last-of-type and only-of-type.
// We have to invalidate everything following the insertion point in the forward case, and everything before the insertion point in the
// backward case.
// |afterChange| is 0 in the parser callback case, so we won't do any work for the forward case if we don't have to.
// For performance reasons we just mark the parent node as changed, since we don't want to make childrenChanged O(n^2) by crawling all our kids
// here. recalcStyle will then force a walk of the children when it sees that this has happened.
if ((style->childrenAffectedByForwardPositionalRules() && afterChange) ||
(style->childrenAffectedByBackwardPositionalRules() && beforeChange))
e->setNeedsStyleRecalc();
}
void Element::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
{
ContainerNode::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
if (changedByParser)
checkForEmptyStyleChange(this, renderStyle());
else
checkForSiblingStyleChanges(this, renderStyle(), false, beforeChange, afterChange, childCountDelta);
if (hasRareData()) {
if (hasShadowRoot())
shadowTree()->hostChildrenChanged();
}
}
void Element::beginParsingChildren()
{
clearIsParsingChildrenFinished();
CSSStyleSelector* styleSelector = document()->styleSelectorIfExists();
if (styleSelector && attached())
styleSelector->pushParentElement(this);
}
void Element::finishParsingChildren()
{
ContainerNode::finishParsingChildren();
setIsParsingChildrenFinished();
checkForSiblingStyleChanges(this, renderStyle(), true, lastChild(), 0, 0);
if (CSSStyleSelector* styleSelector = document()->styleSelectorIfExists())
styleSelector->popParentElement(this);
}
#ifndef NDEBUG
void Element::formatForDebugger(char* buffer, unsigned length) const
{
String result;
String s;
s = nodeName();
if (s.length() > 0) {
result += s;
}
s = getIdAttribute();
if (s.length() > 0) {
if (result.length() > 0)
result += "; ";
result += "id=";
result += s;
}
s = getAttribute(classAttr);
if (s.length() > 0) {
if (result.length() > 0)
result += "; ";
result += "class=";
result += s;
}
strncpy(buffer, result.utf8().data(), length - 1);
}
#endif
PassRefPtr<Attr> Element::setAttributeNode(Attr* attr, ExceptionCode& ec)
{
if (!attr) {
ec = TYPE_MISMATCH_ERR;
return 0;
}
ElementAttributeData* attributeData = ensureUpdatedAttributeData();
Attribute* attribute = attr->attr();
size_t index = attributeData->getAttributeItemIndex(attribute->name());
Attribute* oldAttribute = index != notFound ? attributeData->attributeItem(index) : 0;
if (oldAttribute == attribute)
return attr; // we know about it already
// INUSE_ATTRIBUTE_ERR: 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 (attr->ownerElement()) {
ec = INUSE_ATTRIBUTE_ERR;
return 0;
}
RefPtr<Attr> oldAttr;
if (oldAttribute) {
oldAttr = oldAttribute->createAttrIfNeeded(this);
attributeData->replaceAttribute(index, attribute, this);
} else
attributeData->addAttribute(attribute, this);
return oldAttr.release();
}
PassRefPtr<Attr> Element::setAttributeNodeNS(Attr* attr, ExceptionCode& ec)
{
return setAttributeNode(attr, ec);
}
PassRefPtr<Attr> Element::removeAttributeNode(Attr* attr, ExceptionCode& ec)
{
if (!attr) {
ec = TYPE_MISMATCH_ERR;
return 0;
}
if (attr->ownerElement() != this) {
ec = NOT_FOUND_ERR;
return 0;
}
ASSERT(document() == attr->document());
ElementAttributeData* attributeData = updatedAttributeData();
if (!attributeData)
return 0;
size_t index = attributeData->getAttributeItemIndex(attr->qualifiedName());
if (index == notFound) {
ec = NOT_FOUND_ERR;
return 0;
}
return attributeData->takeAttribute(index, this);
}
void Element::setAttributeNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, const AtomicString& value, ExceptionCode& ec, FragmentScriptingPermission scriptingPermission)
{
String prefix, localName;
if (!Document::parseQualifiedName(qualifiedName, prefix, localName, ec))
return;
QualifiedName qName(prefix, localName, namespaceURI);
if (!Document::hasValidNamespaceForAttributes(qName)) {
ec = NAMESPACE_ERR;
return;
}
if (scriptingPermission == FragmentScriptingNotAllowed && (isEventHandlerAttribute(qName) || isAttributeToRemove(qName, value)))
return;
setAttribute(qName, value);
}
void Element::removeAttribute(const String& name)
{
ElementAttributeData* attributeData = this->attributeData();
if (!attributeData)
return;
String localName = shouldIgnoreAttributeCase(this) ? name.lower() : name;
size_t index = attributeData->getAttributeItemIndex(localName, false);
if (index == notFound)
return;
attributeData->removeAttribute(index, this);
}
void Element::removeAttributeNS(const String& namespaceURI, const String& localName)
{
removeAttribute(QualifiedName(nullAtom, localName, namespaceURI));
}
PassRefPtr<Attr> Element::getAttributeNode(const String& name)
{
ElementAttributeData* attributeData = updatedAttributeData();
if (!attributeData)
return 0;
return attributeData->getAttributeNode(name, shouldIgnoreAttributeCase(this), this);
}
PassRefPtr<Attr> Element::getAttributeNodeNS(const String& namespaceURI, const String& localName)
{
ElementAttributeData* attributeData = updatedAttributeData();
if (!attributeData)
return 0;
return attributeData->getAttributeNode(QualifiedName(nullAtom, localName, namespaceURI), this);
}
bool Element::hasAttribute(const String& name) const
{
ElementAttributeData* attributeData = updatedAttributeData();
if (!attributeData)
return false;
// This call to String::lower() seems to be required but
// there may be a way to remove it.
String localName = shouldIgnoreAttributeCase(this) ? name.lower() : name;
return attributeData->getAttributeItem(localName, false);
}
bool Element::hasAttributeNS(const String& namespaceURI, const String& localName) const
{
ElementAttributeData* attributeData = updatedAttributeData();
if (!attributeData)
return false;
return attributeData->getAttributeItem(QualifiedName(nullAtom, localName, namespaceURI));
}
CSSStyleDeclaration *Element::style()
{
return 0;
}
void Element::focus(bool restorePreviousSelection)
{
if (!inDocument())
return;
Document* doc = document();
if (doc->focusedNode() == this)
return;
// 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 (doc->haveStylesheetsLoaded()) {
doc->updateLayoutIgnorePendingStylesheets();
if (!isFocusable())
return;
}
if (!supportsFocus())
return;
RefPtr<Node> protect;
if (Page* page = doc->page()) {
// 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.
protect = this;
if (!page->focusController()->setFocusedNode(this, doc->frame()))
return;
}
// Setting the focused node above might have invalidated the layout due to scripts.
doc->updateLayoutIgnorePendingStylesheets();
if (!isFocusable()) {
ensureRareData()->setNeedsFocusAppearanceUpdateSoonAfterAttach(true);
return;
}
cancelFocusAppearanceUpdate();
updateFocusAppearance(restorePreviousSelection);
}
void Element::updateFocusAppearance(bool /*restorePreviousSelection*/)
{
if (this == rootEditableElement()) {
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()->rootEditableElement())
return;
// FIXME: We should restore the previous selection if there is one.
VisibleSelection newSelection = VisibleSelection(firstPositionInOrBeforeNode(this), DOWNSTREAM);
if (frame->selection()->shouldChangeSelection(newSelection)) {
frame->selection()->setSelection(newSelection);
frame->selection()->revealSelection();
}
} else if (renderer() && !renderer()->isWidget())
renderer()->enclosingLayer()->scrollRectToVisible(getRect());
}
void Element::blur()
{
cancelFocusAppearanceUpdate();
Document* doc = document();
if (treeScope()->focusedNode() == this) {
if (doc->frame())
doc->frame()->page()->focusController()->setFocusedNode(0, doc->frame());
else
doc->setFocusedNode(0);
}
}
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(rangeOfContents(const_cast<Element*>(this)).get());
}
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();
}
LayoutSize Element::minimumSizeForResizing() const
{
return hasRareData() ? rareData()->m_minimumSizeForResizing : defaultMinimumSizeForResizing();
}
void Element::setMinimumSizeForResizing(const LayoutSize& size)
{
if (size == defaultMinimumSizeForResizing() && !hasRareData())
return;
ensureRareData()->m_minimumSizeForResizing = size;
}
RenderStyle* Element::computedStyle(PseudoId pseudoElementSpecifier)
{
// FIXME: Find and use the renderer from the pseudo element instead of the actual element so that the 'length'
// properties, which are only known by the renderer because it did the layout, will be correct and so that the
// values returned for the ":selection" pseudo-element will be correct.
if (RenderStyle* usedStyle = renderStyle()) {
if (pseudoElementSpecifier) {
RenderStyle* cachedPseudoStyle = usedStyle->getCachedPseudoStyle(pseudoElementSpecifier);
return cachedPseudoStyle ? cachedPseudoStyle : usedStyle;
} else
return usedStyle;
}
if (!attached())
// FIXME: Try to do better than this. Ensure that styleForElement() works for elements that are not in the
// document tree and figure out when to destroy the computed style for such elements.
return 0;
ElementRareData* data = ensureRareData();
if (!data->m_computedStyle)
data->m_computedStyle = document()->styleForElementIgnoringPendingStylesheets(this);
return pseudoElementSpecifier ? data->m_computedStyle->getCachedPseudoStyle(pseudoElementSpecifier) : data->m_computedStyle.get();
}
void Element::setStyleAffectedByEmpty()
{
ElementRareData* data = ensureRareData();
data->m_styleAffectedByEmpty = true;
}
bool Element::styleAffectedByEmpty() const
{
return hasRareData() && rareData()->m_styleAffectedByEmpty;
}
AtomicString Element::computeInheritedLanguage() const
{
const Node* n = this;
AtomicString value;
// The language property is inherited, so we iterate over the parents to find the first language.
while (n && value.isNull()) {
if (n->isElementNode()) {
// Spec: xml:lang takes precedence -- http://www.w3.org/TR/xhtml1/#C_7
value = static_cast<const Element*>(n)->fastGetAttribute(XMLNames::langAttr);
if (value.isNull())
value = static_cast<const Element*>(n)->fastGetAttribute(HTMLNames::langAttr);
} else if (n->isDocumentNode()) {
// checking the MIME content-language
value = static_cast<const Document*>(n)->contentLanguage();
}
n = n->parentNode();
}
return value;
}
void Element::cancelFocusAppearanceUpdate()
{
if (hasRareData())
rareData()->setNeedsFocusAppearanceUpdateSoonAfterAttach(false);
if (document()->focusedNode() == this)
document()->cancelFocusAppearanceUpdate();
}
void Element::normalizeAttributes()
{
ElementAttributeData* attributeData = updatedAttributeData();
if (!attributeData || attributeData->isEmpty())
return;
Vector<RefPtr<Attribute> > attributeVector;
attributeData->copyAttributesToVector(attributeVector);
size_t numAttrs = attributeVector.size();
for (size_t i = 0; i < numAttrs; ++i) {
if (Attr* attr = attributeVector[i]->attr())
attr->normalize();
}
}
// ElementTraversal API
Element* Element::firstElementChild() const
{
return WebCore::firstElementChild(this);
}
Element* Element::lastElementChild() const
{
Node* n = lastChild();
while (n && !n->isElementNode())
n = n->previousSibling();
return static_cast<Element*>(n);
}
unsigned Element::childElementCount() const
{
unsigned count = 0;
Node* n = firstChild();
while (n) {
count += n->isElementNode();
n = n->nextSibling();
}
return count;
}
bool Element::webkitMatchesSelector(const String& selector, ExceptionCode& ec)
{
if (selector.isEmpty()) {
ec = SYNTAX_ERR;
return false;
}
bool strictParsing = !document()->inQuirksMode();
CSSParser p(strictToCSSParserMode(strictParsing));
CSSSelectorList selectorList;
p.parseSelector(selector, document(), selectorList);
if (!selectorList.first()) {
ec = SYNTAX_ERR;
return false;
}
// Throw a NAMESPACE_ERR if the selector includes any namespace prefixes.
if (selectorList.selectorsNeedNamespaceResolution()) {
ec = NAMESPACE_ERR;
return false;
}
SelectorChecker selectorChecker(document(), strictParsing);
for (CSSSelector* selector = selectorList.first(); selector; selector = CSSSelectorList::next(selector)) {
if (selectorChecker.checkSelector(selector, this))
return true;
}
return false;
}
DOMTokenList* Element::classList()
{
ElementRareData* data = ensureRareData();
if (!data->m_classList)
data->m_classList = ClassList::create(this);
return data->m_classList.get();
}
DOMTokenList* Element::optionalClassList() const
{
if (!hasRareData())
return 0;
return rareData()->m_classList.get();
}
DOMStringMap* Element::dataset()
{
ElementRareData* data = ensureRareData();
if (!data->m_datasetDOMStringMap)
data->m_datasetDOMStringMap = DatasetDOMStringMap::create(this);
return data->m_datasetDOMStringMap.get();
}
KURL Element::getURLAttribute(const QualifiedName& name) const
{
#if !ASSERT_DISABLED
if (m_attributeData) {
if (Attribute* attribute = getAttributeItem(name))
ASSERT(isURLAttribute(attribute));
}
#endif
return document()->completeURL(stripLeadingAndTrailingHTMLSpaces(getAttribute(name)));
}
KURL Element::getNonEmptyURLAttribute(const QualifiedName& name) const
{
#if !ASSERT_DISABLED
if (m_attributeData) {
if (Attribute* attribute = getAttributeItem(name))
ASSERT(isURLAttribute(attribute));
}
#endif
String value = stripLeadingAndTrailingHTMLSpaces(getAttribute(name));
if (value.isEmpty())
return KURL();
return document()->completeURL(value);
}
int Element::getIntegralAttribute(const QualifiedName& attributeName) const
{
return getAttribute(attributeName).string().toInt();
}
void Element::setIntegralAttribute(const QualifiedName& attributeName, int value)
{
// FIXME: Need an AtomicString version of String::number.
setAttribute(attributeName, String::number(value));
}
unsigned Element::getUnsignedIntegralAttribute(const QualifiedName& attributeName) const
{
return getAttribute(attributeName).string().toUInt();
}
void Element::setUnsignedIntegralAttribute(const QualifiedName& attributeName, unsigned value)
{
// FIXME: Need an AtomicString version of String::number.
setAttribute(attributeName, String::number(value));
}
#if ENABLE(SVG)
bool Element::childShouldCreateRenderer(const NodeRenderingContext& childContext) const
{
// Only create renderers for SVG elements whose parents are SVG elements, or for proper <svg xmlns="svgNS"> subdocuments.
if (childContext.node()->isSVGElement())
return childContext.node()->hasTagName(SVGNames::svgTag) || isSVGElement();
return Node::childShouldCreateRenderer(childContext);
}
#endif
#if ENABLE(FULLSCREEN_API)
void Element::webkitRequestFullscreen()
{
document()->requestFullScreenForElement(this, ALLOW_KEYBOARD_INPUT, Document::EnforceIFrameAllowFulScreenRequirement);
}
void Element::webkitRequestFullScreen(unsigned short flags)
{
document()->requestFullScreenForElement(this, (flags | LEGACY_MOZILLA_REQUEST), Document::EnforceIFrameAllowFulScreenRequirement);
}
bool Element::containsFullScreenElement() const
{
return hasRareData() ? rareData()->m_containsFullScreenElement : false;
}
void Element::setContainsFullScreenElement(bool flag)
{
ensureRareData()->m_containsFullScreenElement = flag;
setNeedsStyleRecalc(SyntheticStyleChange);
}
static Element* parentCrossingFrameBoundaries(Element* element)
{
ASSERT(element);
return element->parentElement() ? element->parentElement() : element->document()->ownerElement();
}
void Element::setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(bool flag)
{
Element* element = this;
while ((element = parentCrossingFrameBoundaries(element)))
element->setContainsFullScreenElement(flag);
}
#endif
SpellcheckAttributeState Element::spellcheckAttributeState() const
{
const AtomicString& value = getAttribute(HTMLNames::spellcheckAttr);
if (value == nullAtom)
return SpellcheckAttributeDefault;
if (equalIgnoringCase(value, "true") || equalIgnoringCase(value, ""))
return SpellcheckAttributeTrue;
if (equalIgnoringCase(value, "false"))
return SpellcheckAttributeFalse;
return SpellcheckAttributeDefault;
}
bool Element::isSpellCheckingEnabled() const
{
const Element* element = this;
while (element) {
switch (element->spellcheckAttributeState()) {
case SpellcheckAttributeTrue:
return true;
case SpellcheckAttributeFalse:
return false;
case SpellcheckAttributeDefault:
break;
}
ContainerNode* parent = const_cast<Element*>(element)->parentOrHostNode();
if (parent && parent->isElementNode())
element = toElement(parent);
else if (parent && parent->isShadowRoot())
element = toElement(parent->parentOrHostNode());
else
element = 0;
}
return true;
}
PassRefPtr<WebKitAnimationList> Element::webkitGetAnimations() const
{
if (!renderer())
return 0;
AnimationController* animController = renderer()->animation();
if (!animController)
return 0;
return animController->animationsForRenderer(renderer());
}
const AtomicString& Element::webkitRegionOverflow() const
{
document()->updateLayoutIgnorePendingStylesheets();
if (document()->cssRegionsEnabled() && renderer() && renderer()->isRenderRegion()) {
RenderRegion* region = toRenderRegion(renderer());
switch (region->regionState()) {
case RenderRegion::RegionFit: {
DEFINE_STATIC_LOCAL(AtomicString, fitState, ("fit"));
return fitState;
}
case RenderRegion::RegionEmpty: {
DEFINE_STATIC_LOCAL(AtomicString, emptyState, ("empty"));
return emptyState;
}
case RenderRegion::RegionOverflow: {
DEFINE_STATIC_LOCAL(AtomicString, overflowState, ("overflow"));
return overflowState;
}
default:
break;
}
}
DEFINE_STATIC_LOCAL(AtomicString, undefinedState, ("undefined"));
return undefinedState;
}
#ifndef NDEBUG
bool Element::fastAttributeLookupAllowed(const QualifiedName& name) const
{
if (name == HTMLNames::styleAttr)
return false;
#if ENABLE(SVG)
if (isSVGElement())
return !SVGElement::isAnimatableAttribute(name);
#endif
return true;
}
#endif
#ifdef DUMP_NODE_STATISTICS
bool Element::hasNamedNodeMap() const
{
return hasRareData() && rareData()->m_attributeMap;
}
#endif
void Element::willModifyAttribute(const QualifiedName& name, const AtomicString& oldValue, const AtomicString& newValue)
{
if (isIdAttributeName(name))
updateId(oldValue, newValue);
else if (name == HTMLNames::nameAttr)
updateName(oldValue, newValue);
#if ENABLE(MUTATION_OBSERVERS)
if (OwnPtr<MutationObserverInterestGroup> recipients = MutationObserverInterestGroup::createForAttributesMutation(this, name))
recipients->enqueueMutationRecord(MutationRecord::createAttributes(this, name, oldValue));
#endif
#if ENABLE(INSPECTOR)
InspectorInstrumentation::willModifyDOMAttr(document(), this, oldValue, newValue);
#endif
}
void Element::didAddAttribute(Attribute* attr)
{
attributeChanged(attr);
InspectorInstrumentation::didModifyDOMAttr(document(), this, attr->name().localName(), attr->value());
dispatchSubtreeModifiedEvent();
}
void Element::didModifyAttribute(Attribute* attr)
{
attributeChanged(attr);
InspectorInstrumentation::didModifyDOMAttr(document(), this, attr->name().localName(), attr->value());
// Do not dispatch a DOMSubtreeModified event here; see bug 81141.
}
void Element::didRemoveAttribute(Attribute* attr)
{
if (attr->isNull())
return;
AtomicString savedValue = attr->value();
attr->setValue(nullAtom);
attributeChanged(attr);
attr->setValue(savedValue);
InspectorInstrumentation::didRemoveDOMAttr(document(), this, attr->name().localName());
dispatchSubtreeModifiedEvent();
}
void Element::updateNamedItemRegistration(const AtomicString& oldName, const AtomicString& newName)
{
if (!document()->isHTMLDocument())
return;
if (!oldName.isEmpty())
static_cast<HTMLDocument*>(document())->removeNamedItem(oldName);
if (!newName.isEmpty())
static_cast<HTMLDocument*>(document())->addNamedItem(newName);
}
void Element::updateExtraNamedItemRegistration(const AtomicString& oldId, const AtomicString& newId)
{
if (!document()->isHTMLDocument())
return;
if (!oldId.isEmpty())
static_cast<HTMLDocument*>(document())->removeExtraNamedItem(oldId);
if (!newId.isEmpty())
static_cast<HTMLDocument*>(document())->addExtraNamedItem(newId);
}
HTMLCollection* Element::ensureCachedHTMLCollection(CollectionType type)
{
return ensureRareData()->ensureCachedHTMLCollection(this, type);
}
IntSize Element::savedLayerScrollOffset() const
{
return hasRareData() ? rareData()->m_savedLayerScrollOffset : IntSize();
}
void Element::setSavedLayerScrollOffset(const IntSize& size)
{
if (size.isZero() && !hasRareData())
return;
ensureRareData()->m_savedLayerScrollOffset = size;
}
} // namespace WebCore