blob: ecaa500322d2d19d5c45f16ec9d6047b471b031f [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, 2012, 2013 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 "core/dom/Element.h"
#include "HTMLNames.h"
#include "SVGNames.h"
#include "XMLNames.h"
#include "core/accessibility/AXObjectCache.h"
#include "core/css/StylePropertySet.h"
#include "core/css/resolver/StyleResolver.h"
#include "core/dom/Attr.h"
#include "core/dom/ClientRect.h"
#include "core/dom/ClientRectList.h"
#include "core/dom/CustomElementRegistry.h"
#include "core/dom/DatasetDOMStringMap.h"
#include "core/dom/Document.h"
#include "core/dom/DocumentSharedObjectPool.h"
#include "core/dom/ElementRareData.h"
#include "core/dom/ExceptionCode.h"
#include "core/dom/FullscreenController.h"
#include "core/dom/MutationObserverInterestGroup.h"
#include "core/dom/MutationRecord.h"
#include "core/dom/NamedNodeMap.h"
#include "core/dom/NodeRenderStyle.h"
#include "core/dom/NodeRenderingContext.h"
#include "core/dom/PseudoElement.h"
#include "core/dom/SelectorQuery.h"
#include "core/dom/Text.h"
#include "core/dom/WebCoreMemoryInstrumentation.h"
#include "core/dom/shadow/InsertionPoint.h"
#include "core/dom/shadow/ShadowRoot.h"
#include "core/editing/FrameSelection.h"
#include "core/editing/TextIterator.h"
#include "core/editing/htmlediting.h"
#include "core/html/ClassList.h"
#include "core/html/HTMLCollection.h"
#include "core/html/HTMLDocument.h"
#include "core/html/HTMLElement.h"
#include "core/html/HTMLFormControlsCollection.h"
#include "core/html/HTMLFrameOwnerElement.h"
#include "core/html/HTMLLabelElement.h"
#include "core/html/HTMLOptionsCollection.h"
#include "core/html/HTMLTableRowsCollection.h"
#include "core/html/parser/HTMLParserIdioms.h"
#include "core/page/FocusController.h"
#include "core/page/Frame.h"
#include "core/page/FrameView.h"
#include "core/page/Page.h"
#include "core/page/PointerLockController.h"
#include "core/rendering/FlowThreadController.h"
#include "core/rendering/RenderRegion.h"
#include "core/rendering/RenderView.h"
#include "core/rendering/RenderWidget.h"
#include "core/svg/SVGDocumentExtensions.h"
#include "core/svg/SVGElement.h"
#include "wtf/BitVector.h"
#include "wtf/MemoryInstrumentationVector.h"
#include "wtf/text/CString.h"
namespace WebCore {
using namespace HTMLNames;
using namespace XMLNames;
static inline bool shouldIgnoreAttributeCase(const Element* e)
{
return e && e->document()->isHTMLDocument() && e->isHTMLElement();
}
class StyleResolverParentPusher {
public:
StyleResolverParentPusher(Element* parent)
: m_parent(parent)
, m_pushedStyleResolver(0)
{
}
void push()
{
if (m_pushedStyleResolver)
return;
m_pushedStyleResolver = m_parent->document()->styleResolver();
m_pushedStyleResolver->pushParentElement(m_parent);
}
~StyleResolverParentPusher()
{
if (!m_pushedStyleResolver)
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_pushedStyleResolver == m_parent->document()->styleResolver());
if (m_pushedStyleResolver != m_parent->document()->styleResolver())
return;
m_pushedStyleResolver->popParentElement(m_parent);
}
private:
Element* m_parent;
StyleResolver* m_pushedStyleResolver;
};
typedef Vector<RefPtr<Attr> > AttrNodeList;
typedef HashMap<Element*, OwnPtr<AttrNodeList> > AttrNodeListMap;
static AttrNodeListMap& attrNodeListMap()
{
DEFINE_STATIC_LOCAL(AttrNodeListMap, map, ());
return map;
}
static AttrNodeList* attrNodeListForElement(Element* element)
{
if (!element->hasSyntheticAttrChildNodes())
return 0;
ASSERT(attrNodeListMap().contains(element));
return attrNodeListMap().get(element);
}
static AttrNodeList* ensureAttrNodeListForElement(Element* element)
{
if (element->hasSyntheticAttrChildNodes()) {
ASSERT(attrNodeListMap().contains(element));
return attrNodeListMap().get(element);
}
ASSERT(!attrNodeListMap().contains(element));
element->setHasSyntheticAttrChildNodes(true);
AttrNodeListMap::AddResult result = attrNodeListMap().add(element, adoptPtr(new AttrNodeList));
return result.iterator->value.get();
}
static void removeAttrNodeListForElement(Element* element)
{
ASSERT(element->hasSyntheticAttrChildNodes());
ASSERT(attrNodeListMap().contains(element));
attrNodeListMap().remove(element);
element->setHasSyntheticAttrChildNodes(false);
}
static Attr* findAttrNodeInList(AttrNodeList* attrNodeList, const QualifiedName& name)
{
for (unsigned i = 0; i < attrNodeList->size(); ++i) {
if (attrNodeList->at(i)->qualifiedName() == name)
return attrNodeList->at(i).get();
}
return 0;
}
PassRefPtr<Element> Element::create(const QualifiedName& tagName, Document* document)
{
return adoptRef(new Element(tagName, document, CreateElement));
}
Element::~Element()
{
#ifndef NDEBUG
if (document() && document()->renderer()) {
// When the document is not destroyed, an element that was part of a named flow
// content nodes should have been removed from the content nodes collection
// and the inNamedFlow flag reset.
ASSERT(!inNamedFlow());
}
#endif
if (hasRareData()) {
ElementRareData* data = elementRareData();
data->setPseudoElement(BEFORE, 0);
data->setPseudoElement(AFTER, 0);
data->clearShadow();
}
if (isCustomElement() && document() && document()->registry()) {
document()->registry()->customElementWasDestroyed(this);
}
if (hasSyntheticAttrChildNodes())
detachAllAttrNodesFromElement();
if (hasPendingResources()) {
document()->accessSVGExtensions()->removeElementFromPendingResources(this);
ASSERT(!hasPendingResources());
}
}
inline ElementRareData* Element::elementRareData() const
{
ASSERT(hasRareData());
return static_cast<ElementRareData*>(rareData());
}
inline ElementRareData* Element::ensureElementRareData()
{
return static_cast<ElementRareData*>(ensureRareData());
}
void Element::clearTabIndexExplicitlyIfNeeded()
{
if (hasRareData())
elementRareData()->clearTabIndexExplicitly();
}
void Element::setTabIndexExplicitly(short tabIndex)
{
ensureElementRareData()->setTabIndexExplicitly(tabIndex);
}
bool Element::supportsFocus() const
{
return hasRareData() && elementRareData()->tabIndexSetExplicitly();
}
short Element::tabIndex() const
{
return hasRareData() ? elementRareData()->tabIndex() : 0;
}
bool Element::rendererIsFocusable() const
{
// 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 (isInCanvasSubtree()) {
const Element* e = this;
while (e && !e->hasLocalName(canvasTag))
e = e->parentElement();
ASSERT(e);
return e->renderer() && e->renderer()->style()->visibility() == VISIBLE;
}
// FIXME: These asserts should be in Node::isFocusable, but there are some
// callsites like Document::setFocusedNode that would currently fail on
// them. See crbug.com/251163
if (renderer()) {
ASSERT(!renderer()->needsLayout());
} else {
// We can't just use needsStyleRecalc() because if the node is in a
// display:none tree it might say it needs style recalc but the whole
// document is actually up to date.
ASSERT(!document()->childNeedsStyleRecalc());
}
// FIXME: Even if we are not visible, we might have a child that is visible.
// Hyatt wants to fix that some day with a "has visible content" flag or the like.
if (!renderer() || renderer()->style()->visibility() != VISIBLE)
return false;
return true;
}
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->cloneDataFromElement(*this);
return clone.release();
}
PassRefPtr<Element> Element::cloneElementWithoutAttributesAndChildren()
{
return document()->createElement(tagQName(), false);
}
PassRefPtr<Attr> Element::detachAttribute(size_t index)
{
ASSERT(elementData());
const Attribute* attribute = elementData()->attributeItem(index);
RefPtr<Attr> attrNode = attrIfExists(attribute->name());
if (attrNode)
detachAttrNodeAtIndex(attrNode.get(), index);
else {
attrNode = Attr::create(document(), attribute->name(), attribute->value());
removeAttributeInternal(index, NotInSynchronizationOfLazyAttribute);
}
return attrNode.release();
}
void Element::detachAttrNodeAtIndex(Attr* attr, size_t index)
{
ASSERT(attr);
ASSERT(elementData());
const Attribute* attribute = elementData()->attributeItem(index);
ASSERT(attribute);
ASSERT(attribute->name() == attr->qualifiedName());
detachAttrNodeFromElementWithValue(attr, attribute->value());
removeAttributeInternal(index, NotInSynchronizationOfLazyAttribute);
}
void Element::removeAttribute(const QualifiedName& name)
{
if (!elementData())
return;
size_t index = elementData()->getAttributeItemIndex(name);
if (index == notFound)
return;
removeAttributeInternal(index, NotInSynchronizationOfLazyAttribute);
}
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(NamedNodeMap::create(const_cast<Element*>(this)));
return rareData->attributeMap();
}
void Element::addActiveAnimation(Animation* animation)
{
ElementRareData* rareData = ensureElementRareData();
if (!rareData->activeAnimations())
rareData->setActiveAnimations(adoptPtr(new Vector<Animation*>));
rareData->activeAnimations()->append(animation);
}
void Element::removeActiveAnimation(Animation* animation)
{
ElementRareData* rareData = elementRareData();
ASSERT(rareData);
size_t position = rareData->activeAnimations()->find(animation);
ASSERT(position != notFound);
rareData->activeAnimations()->remove(position);
}
bool Element::hasActiveAnimations() const
{
return hasRareData() && elementRareData()->activeAnimations()
&& elementRareData()->activeAnimations()->size();
}
Vector<Animation*>* Element::activeAnimations() const
{
if (!elementRareData())
return 0;
return elementRareData()->activeAnimations();
}
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()->m_styleAttributeIsDirty) {
ASSERT(isStyledElement());
static_cast<const StyledElement*>(this)->synchronizeStyleAttributeInternal();
}
if (elementData()->m_animatedSVGAttributesAreDirty) {
ASSERT(isSVGElement());
toSVGElement(this)->synchronizeAnimatedSVGAttribute(anyQName());
}
}
inline void Element::synchronizeAttribute(const QualifiedName& name) const
{
if (!elementData())
return;
if (UNLIKELY(name == styleAttr && elementData()->m_styleAttributeIsDirty)) {
ASSERT(isStyledElement());
static_cast<const StyledElement*>(this)->synchronizeStyleAttributeInternal();
return;
}
if (UNLIKELY(elementData()->m_animatedSVGAttributesAreDirty)) {
ASSERT(isSVGElement());
toSVGElement(this)->synchronizeAnimatedSVGAttribute(name);
}
}
inline void Element::synchronizeAttribute(const AtomicString& 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()->m_styleAttributeIsDirty && equalPossiblyIgnoringCase(localName, styleAttr.localName(), shouldIgnoreAttributeCase(this))) {
ASSERT(isStyledElement());
static_cast<const StyledElement*>(this)->synchronizeStyleAttributeInternal();
return;
}
if (elementData()->m_animatedSVGAttributesAreDirty) {
// We're not passing a namespace argument on purpose. SVGNames::*Attr are defined w/o namespaces as well.
ASSERT(isSVGElement());
static_cast<const SVGElement*>(this)->synchronizeAnimatedSVGAttribute(QualifiedName(nullAtom, localName, nullAtom));
}
}
const AtomicString& Element::getAttribute(const QualifiedName& name) const
{
if (!elementData())
return nullAtom;
synchronizeAttribute(name);
if (const Attribute* attribute = getAttributeItem(name))
return attribute->value();
return nullAtom;
}
void Element::scrollIntoView(bool alignToTop)
{
document()->updateLayoutIgnorePendingStylesheets();
if (!renderer())
return;
LayoutRect bounds = boundingBox();
// Align to the top / bottom and to the closest edge.
if (alignToTop)
renderer()->scrollRectToVisible(bounds, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignTopAlways);
else
renderer()->scrollRectToVisible(bounds, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignBottomAlways);
}
void Element::scrollIntoViewIfNeeded(bool centerIfNeeded)
{
document()->updateLayoutIgnorePendingStylesheets();
if (!renderer())
return;
LayoutRect bounds = boundingBox();
if (centerIfNeeded)
renderer()->scrollRectToVisible(bounds, ScrollAlignment::alignCenterIfNeeded, ScrollAlignment::alignCenterIfNeeded);
else
renderer()->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;
}
Node* stopNode = this;
toRenderBox(renderer())->scroll(direction, granularity, units, &stopNode);
}
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 int adjustForLocalZoom(LayoutUnit value, RenderObject* renderer)
{
float zoomFactor = localZoomForRenderer(renderer);
if (zoomFactor == 1)
return value;
return lroundf(value / zoomFactor);
}
int Element::offsetLeft()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* renderer = renderBoxModelObject())
return adjustForLocalZoom(renderer->pixelSnappedOffsetLeft(), renderer);
return 0;
}
int Element::offsetTop()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* renderer = renderBoxModelObject())
return adjustForLocalZoom(renderer->pixelSnappedOffsetTop(), renderer);
return 0;
}
int Element::offsetWidth()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* renderer = renderBoxModelObject())
return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedOffsetWidth(), renderer).round();
return 0;
}
int Element::offsetHeight()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* renderer = renderBoxModelObject())
return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedOffsetHeight(), renderer).round();
return 0;
}
Element* Element::bindingsOffsetParent()
{
Element* element = offsetParent();
if (!element || !element->isInShadowTree())
return element;
return element->containingShadowRoot()->shouldExposeToBindings() ? element : 0;
}
Element* Element::offsetParent()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject* renderer = this->renderer())
return renderer->offsetParent();
return 0;
}
int Element::clientLeft()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* renderer = renderBox())
return adjustForAbsoluteZoom(roundToInt(renderer->clientLeft()), renderer);
return 0;
}
int Element::clientTop()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* renderer = renderBox())
return adjustForAbsoluteZoom(roundToInt(renderer->clientTop()), renderer);
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* renderer = renderBox())
return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedClientWidth(), renderer).round();
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* renderer = renderBox())
return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedClientHeight(), renderer).round();
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 (isSVGElement() && renderer()) {
// Get the bounding rectangle from the SVG model.
SVGElement* svgElement = toSVGElement(this);
FloatRect localRect;
if (svgElement->getBoundingBox(localRect))
quads.append(renderer()->localToAbsoluteQuad(localRect));
} else {
// 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);
document()->adjustFloatQuadsForScrollAndAbsoluteZoom(quads, renderBoxModelObject);
return ClientRectList::create(quads);
}
PassRefPtr<ClientRect> Element::getBoundingClientRect()
{
document()->updateLayoutIgnorePendingStylesheets();
Vector<FloatQuad> quads;
if (isSVGElement() && renderer() && !renderer()->isSVGRoot()) {
// Get the bounding rectangle from the SVG model.
SVGElement* svgElement = toSVGElement(this);
FloatRect localRect;
if (svgElement->getBoundingBox(localRect))
quads.append(renderer()->localToAbsoluteQuad(localRect));
} else {
// 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());
document()->adjustFloatRectForScrollAndAbsoluteZoom(result, renderer());
return ClientRect::create(result);
}
IntRect Element::screenRect() const
{
if (!renderer())
return IntRect();
// FIXME: this should probably respect transforms
return document()->view()->contentsToScreen(renderer()->absoluteBoundingBoxRectIgnoringTransforms());
}
const AtomicString& Element::getAttribute(const AtomicString& localName) const
{
if (!elementData())
return nullAtom;
synchronizeAttribute(localName);
if (const Attribute* attribute = elementData()->getAttributeItem(localName, shouldIgnoreAttributeCase(this)))
return attribute->value();
return nullAtom;
}
const AtomicString& Element::getAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName) const
{
return getAttribute(QualifiedName(nullAtom, localName, namespaceURI));
}
void Element::setAttribute(const AtomicString& localName, const AtomicString& value, ExceptionCode& ec)
{
if (!Document::isValidName(localName)) {
ec = INVALID_CHARACTER_ERR;
return;
}
synchronizeAttribute(localName);
const AtomicString& caseAdjustedLocalName = shouldIgnoreAttributeCase(this) ? localName.lower() : localName;
size_t index = elementData() ? elementData()->getAttributeItemIndex(caseAdjustedLocalName, false) : notFound;
const QualifiedName& qName = index != notFound ? attributeItem(index)->name() : QualifiedName(nullAtom, caseAdjustedLocalName, nullAtom);
setAttributeInternal(index, qName, value, NotInSynchronizationOfLazyAttribute);
}
void Element::setAttribute(const QualifiedName& name, const AtomicString& value)
{
synchronizeAttribute(name);
size_t index = elementData() ? elementData()->getAttributeItemIndex(name) : notFound;
setAttributeInternal(index, name, value, NotInSynchronizationOfLazyAttribute);
}
void Element::setSynchronizedLazyAttribute(const QualifiedName& name, const AtomicString& value)
{
size_t index = elementData() ? elementData()->getAttributeItemIndex(name) : notFound;
setAttributeInternal(index, name, value, InSynchronizationOfLazyAttribute);
}
inline void Element::setAttributeInternal(size_t index, const QualifiedName& name, const AtomicString& newValue, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
{
if (newValue.isNull()) {
if (index != notFound)
removeAttributeInternal(index, inSynchronizationOfLazyAttribute);
return;
}
if (index == notFound) {
addAttributeInternal(name, newValue, inSynchronizationOfLazyAttribute);
return;
}
if (!inSynchronizationOfLazyAttribute)
willModifyAttribute(name, attributeItem(index)->value(), newValue);
if (newValue != attributeItem(index)->value()) {
// If there is an Attr node hooked to this attribute, the Attr::setValue() call below
// will write into the ElementData.
// FIXME: Refactor this so it makes some sense.
if (RefPtr<Attr> attrNode = inSynchronizationOfLazyAttribute ? 0 : attrIfExists(name))
attrNode->setValue(newValue);
else
ensureUniqueElementData()->attributeItem(index)->setValue(newValue);
}
if (!inSynchronizationOfLazyAttribute)
didModifyAttribute(name, newValue);
}
static inline AtomicString makeIdForStyleResolution(const AtomicString& value, bool inQuirksMode)
{
if (inQuirksMode)
return value.lower();
return value;
}
static bool checkNeedsStyleInvalidationForIdChange(const AtomicString& oldId, const AtomicString& newId, StyleResolver* styleResolver)
{
ASSERT(newId != oldId);
if (!oldId.isEmpty() && styleResolver->hasSelectorForId(oldId))
return true;
if (!newId.isEmpty() && styleResolver->hasSelectorForId(newId))
return true;
return false;
}
void Element::attributeChanged(const QualifiedName& name, const AtomicString& newValue, AttributeModificationReason)
{
if (ElementShadow* parentElementShadow = shadowOfParentForDistribution(this)) {
if (shouldInvalidateDistributionWhenAttributeChanged(parentElementShadow, name, newValue))
parentElementShadow->invalidateDistribution();
}
parseAttribute(name, newValue);
document()->incDOMTreeVersion();
StyleResolver* styleResolver = document()->styleResolverIfExists();
bool testShouldInvalidateStyle = attached() && styleResolver && styleChangeType() < FullStyleChange;
bool shouldInvalidateStyle = false;
if (isIdAttributeName(name)) {
AtomicString oldId = elementData()->idForStyleResolution();
AtomicString newId = makeIdForStyleResolution(newValue, document()->inQuirksMode());
if (newId != oldId) {
elementData()->setIdForStyleResolution(newId);
shouldInvalidateStyle = testShouldInvalidateStyle && checkNeedsStyleInvalidationForIdChange(oldId, newId, styleResolver);
}
} else if (name == classAttr)
classAttributeChanged(newValue);
else if (name == HTMLNames::nameAttr)
setHasName(!newValue.isNull());
else if (name == HTMLNames::pseudoAttr)
shouldInvalidateStyle |= testShouldInvalidateStyle && isInShadowTree();
invalidateNodeListCachesInAncestors(&name, this);
// If there is currently no StyleResolver, we can't be sure that this attribute change won't affect style.
shouldInvalidateStyle |= !styleResolver;
if (shouldInvalidateStyle)
setNeedsStyleRecalc();
if (AXObjectCache* cache = document()->existingAXObjectCache())
cache->handleAttributeChanged(name, this);
}
inline void Element::attributeChangedFromParserOrByCloning(const QualifiedName& name, const AtomicString& newValue, AttributeModificationReason reason)
{
if (RuntimeEnabledFeatures::customDOMElementsEnabled() && name == isAttr) {
document()->ensureCustomElementRegistry()->didGiveTypeExtension(this, newValue);
}
attributeChanged(name, newValue, reason);
}
template <typename CharacterType>
static inline bool classStringHasClassName(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 classStringHasClassName(const AtomicString& newClassString)
{
unsigned length = newClassString.length();
if (!length)
return false;
if (newClassString.is8Bit())
return classStringHasClassName(newClassString.characters8(), length);
return classStringHasClassName(newClassString.characters16(), length);
}
template<typename Checker>
static bool checkSelectorForClassChange(const SpaceSplitString& changedClasses, const Checker& checker)
{
unsigned changedSize = changedClasses.size();
for (unsigned i = 0; i < changedSize; ++i) {
if (checker.hasSelectorForClass(changedClasses[i]))
return true;
}
return false;
}
template<typename Checker>
static bool checkSelectorForClassChange(const SpaceSplitString& oldClasses, const SpaceSplitString& newClasses, const Checker& checker)
{
unsigned oldSize = oldClasses.size();
if (!oldSize)
return checkSelectorForClassChange(newClasses, checker);
BitVector remainingClassBits;
remainingClassBits.ensureSize(oldSize);
// Class vectors tend to be very short. This is faster than using a hash table.
unsigned newSize = newClasses.size();
for (unsigned i = 0; i < newSize; ++i) {
for (unsigned j = 0; j < oldSize; ++j) {
if (newClasses[i] == oldClasses[j]) {
remainingClassBits.quickSet(j);
continue;
}
}
if (checker.hasSelectorForClass(newClasses[i]))
return true;
}
for (unsigned i = 0; i < oldSize; ++i) {
// If the bit is not set the the corresponding class has been removed.
if (remainingClassBits.quickGet(i))
continue;
if (checker.hasSelectorForClass(oldClasses[i]))
return true;
}
return false;
}
void Element::classAttributeChanged(const AtomicString& newClassString)
{
StyleResolver* styleResolver = document()->styleResolverIfExists();
bool testShouldInvalidateStyle = attached() && styleResolver && styleChangeType() < FullStyleChange;
bool shouldInvalidateStyle = false;
if (classStringHasClassName(newClassString)) {
const bool shouldFoldCase = document()->inQuirksMode();
const SpaceSplitString oldClasses = elementData()->classNames();
elementData()->setClass(newClassString, shouldFoldCase);
const SpaceSplitString& newClasses = elementData()->classNames();
shouldInvalidateStyle = testShouldInvalidateStyle && checkSelectorForClassChange(oldClasses, newClasses, *styleResolver);
} else {
const SpaceSplitString& oldClasses = elementData()->classNames();
shouldInvalidateStyle = testShouldInvalidateStyle && checkSelectorForClassChange(oldClasses, *styleResolver);
elementData()->clearClass();
}
if (hasRareData())
elementRareData()->clearClassListValueForQuirksMode();
if (shouldInvalidateStyle)
setNeedsStyleRecalc();
}
bool Element::shouldInvalidateDistributionWhenAttributeChanged(ElementShadow* elementShadow, const QualifiedName& name, const AtomicString& newValue)
{
ASSERT(elementShadow);
const SelectRuleFeatureSet& featureSet = elementShadow->distributor().ensureSelectFeatureSet(elementShadow);
if (isIdAttributeName(name)) {
AtomicString oldId = elementData()->idForStyleResolution();
AtomicString newId = makeIdForStyleResolution(newValue, document()->inQuirksMode());
if (newId != oldId) {
if (!oldId.isEmpty() && featureSet.hasSelectorForId(oldId))
return true;
if (!newId.isEmpty() && featureSet.hasSelectorForId(newId))
return true;
}
}
if (name == HTMLNames::classAttr) {
const AtomicString& newClassString = newValue;
if (classStringHasClassName(newClassString)) {
const bool shouldFoldCase = document()->inQuirksMode();
const SpaceSplitString& oldClasses = elementData()->classNames();
const SpaceSplitString newClasses(newClassString, shouldFoldCase);
if (checkSelectorForClassChange(oldClasses, newClasses, featureSet))
return true;
} else {
const SpaceSplitString& oldClasses = elementData()->classNames();
if (checkSelectorForClassChange(oldClasses, featureSet))
return true;
}
}
return featureSet.hasSelectorForAttribute(name.localName());
}
// 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 inline bool isEventHandlerAttribute(const Attribute& attribute)
{
return attribute.name().namespaceURI().isNull() && attribute.name().localName().startsWith("on");
}
bool Element::isJavaScriptURLAttribute(const Attribute& attribute) const
{
return isURLAttribute(attribute) && protocolIsJavaScript(stripLeadingAndTrailingHTMLSpaces(attribute.value()));
}
void Element::stripScriptingAttributes(Vector<Attribute>& attributeVector) const
{
size_t destination = 0;
for (size_t source = 0; source < attributeVector.size(); ++source) {
if (isEventHandlerAttribute(attributeVector[source])
|| isJavaScriptURLAttribute(attributeVector[source])
|| isHTMLContentAttribute(attributeVector[source]))
continue;
if (source != destination)
attributeVector[destination] = attributeVector[source];
++destination;
}
attributeVector.shrink(destination);
}
void Element::parserSetAttributes(const Vector<Attribute>& attributeVector)
{
ASSERT(!inDocument());
ASSERT(!parentNode());
ASSERT(!m_elementData);
if (attributeVector.isEmpty())
return;
if (document() && document()->sharedObjectPool())
m_elementData = document()->sharedObjectPool()->cachedShareableElementDataWithAttributes(attributeVector);
else
m_elementData = ShareableElementData::createWithAttributes(attributeVector);
// Use attributeVector instead of m_elementData because attributeChanged might modify m_elementData.
for (unsigned i = 0; i < attributeVector.size(); ++i)
attributeChangedFromParserOrByCloning(attributeVector[i].name(), attributeVector[i].value(), ModifiedDirectly);
}
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();
}
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);
}
const AtomicString& Element::imageSourceURL() const
{
return getAttribute(srcAttr);
}
bool Element::rendererIsNeeded(const NodeRenderingContext& context)
{
return context.style()->display() != NONE;
}
RenderObject* Element::createRenderer(RenderStyle* style)
{
return RenderObject::createObject(this, style);
}
#if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
bool Element::isDateTimeEditElement() const
{
return false;
}
bool Element::isDateTimeFieldElement() const
{
return false;
}
bool Element::isPickerIndicatorElement() const
{
return false;
}
#endif
bool Element::isClearButtonElement() const
{
return false;
}
bool Element::wasChangedSinceLastFormControlChangeEvent() const
{
return false;
}
void Element::setChangedSinceLastFormControlChangeEvent(bool)
{
}
bool Element::isInert() const
{
const Element* dialog = document()->activeModalDialog();
if (dialog && !containsIncludingShadowDOM(dialog) && !dialog->containsIncludingShadowDOM(this))
return true;
return document()->ownerElement() && document()->ownerElement()->isInert();
}
Node::InsertionNotificationRequest Element::insertedInto(ContainerNode* insertionPoint)
{
// need to do superclass processing first so inDocument() is true
// by the time we reach updateId
ContainerNode::insertedInto(insertionPoint);
if (containsFullScreenElement() && parentElement() && !parentElement()->containsFullScreenElement())
setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(true);
if (Element* before = pseudoElement(BEFORE))
before->insertedInto(insertionPoint);
if (Element* after = pseudoElement(AFTER))
after->insertedInto(insertionPoint);
if (!insertionPoint->isInTreeScope())
return InsertionDone;
if (hasRareData())
elementRareData()->clearClassListValueForQuirksMode();
TreeScope* scope = insertionPoint->treeScope();
if (scope != treeScope())
return InsertionDone;
const AtomicString& idValue = getIdAttribute();
if (!idValue.isNull())
updateId(scope, nullAtom, idValue);
const AtomicString& nameValue = getNameAttribute();
if (!nameValue.isNull())
updateName(nullAtom, nameValue);
if (hasTagName(labelTag)) {
if (scope->shouldCacheLabelsByForAttribute())
updateLabel(scope, nullAtom, fastGetAttribute(forAttr));
}
return InsertionDone;
}
void Element::removedFrom(ContainerNode* insertionPoint)
{
bool wasInDocument = insertionPoint->document();
if (Element* before = pseudoElement(BEFORE))
before->removedFrom(insertionPoint);
if (Element* after = pseudoElement(AFTER))
after->removedFrom(insertionPoint);
document()->removeFromTopLayer(this);
if (containsFullScreenElement())
setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(false);
if (document()->page())
document()->page()->pointerLockController()->elementRemoved(this);
setSavedLayerScrollOffset(IntSize());
if (insertionPoint->isInTreeScope() && treeScope() == document()) {
const AtomicString& idValue = getIdAttribute();
if (!idValue.isNull())
updateId(insertionPoint->treeScope(), idValue, nullAtom);
const AtomicString& nameValue = getNameAttribute();
if (!nameValue.isNull())
updateName(nameValue, nullAtom);
if (hasTagName(labelTag)) {
TreeScope* treeScope = insertionPoint->treeScope();
if (treeScope->shouldCacheLabelsByForAttribute())
updateLabel(treeScope, fastGetAttribute(forAttr), nullAtom);
}
}
ContainerNode::removedFrom(insertionPoint);
if (wasInDocument && hasPendingResources())
document()->accessSVGExtensions()->removeElementFromPendingResources(this);
}
void Element::createRendererIfNeeded(const AttachContext& context)
{
NodeRenderingContext(this, context).createRendererForElementIfNeeded();
}
void Element::attach(const AttachContext& context)
{
PostAttachCallbackDisabler callbackDisabler(this);
StyleResolverParentPusher parentPusher(this);
WidgetHierarchyUpdatesSuspensionScope suspendWidgetHierarchyUpdates;
createRendererIfNeeded(context);
if (parentElement() && parentElement()->isInCanvasSubtree())
setIsInCanvasSubtree(true);
createPseudoElementIfNeeded(BEFORE);
// When a shadow root exists, it does the work of attaching the children.
if (ElementShadow* shadow = this->shadow()) {
parentPusher.push();
shadow->attach(context);
} else if (firstChild())
parentPusher.push();
ContainerNode::attach(context);
createPseudoElementIfNeeded(AFTER);
if (hasRareData()) {
ElementRareData* data = elementRareData();
if (data->needsFocusAppearanceUpdateSoonAfterAttach()) {
if (isFocusable() && document()->focusedNode() == this)
document()->updateFocusAppearanceSoon(false /* don't restore selection */);
data->setNeedsFocusAppearanceUpdateSoonAfterAttach(false);
}
}
}
void Element::unregisterNamedFlowContentNode()
{
if (RuntimeEnabledFeatures::cssRegionsEnabled() && inNamedFlow() && document()->renderView())
document()->renderView()->flowThreadController()->unregisterNamedFlowContentNode(this);
}
void Element::detach(const AttachContext& context)
{
WidgetHierarchyUpdatesSuspensionScope suspendWidgetHierarchyUpdates;
unregisterNamedFlowContentNode();
cancelFocusAppearanceUpdate();
if (hasRareData()) {
ElementRareData* data = elementRareData();
data->setPseudoElement(BEFORE, 0);
data->setPseudoElement(AFTER, 0);
data->setIsInCanvasSubtree(false);
data->resetComputedStyle();
data->resetDynamicRestyleObservations();
}
if (ElementShadow* shadow = this->shadow())
shadow->detach(context);
ContainerNode::detach(context);
}
bool Element::pseudoStyleCacheIsInvalid(const RenderStyle* currentStyle, RenderStyle* newStyle)
{
ASSERT(currentStyle == renderStyle());
ASSERT(renderer());
if (!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(PseudoStyleRequest(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::styleForRenderer()
{
if (hasCustomStyleCallbacks()) {
if (RefPtr<RenderStyle> style = customStyleForRenderer())
return style.release();
}
return originalStyleForRenderer();
}
PassRefPtr<RenderStyle> Element::originalStyleForRenderer()
{
return document()->styleResolver()->styleForElement(this);
}
void Element::recalcStyle(StyleChange change)
{
ASSERT(document()->inStyleRecalc());
if (hasCustomStyleCallbacks())
willRecalcStyle(change);
// Ref currentStyle in case it would otherwise be deleted when setting the new style in the renderer.
RefPtr<RenderStyle> currentStyle(renderStyle());
bool hasParentStyle = parentNodeForRenderingAndStyle() ? static_cast<bool>(parentNodeForRenderingAndStyle()->renderStyle()) : false;
bool hasDirectAdjacentRules = childrenAffectedByDirectAdjacentRules();
bool hasIndirectAdjacentRules = childrenAffectedByForwardPositionalRules();
if ((change > NoChange || needsStyleRecalc())) {
if (hasRareData())
elementRareData()->resetComputedStyle();
}
if (hasParentStyle && (change >= Inherit || needsStyleRecalc())) {
StyleChange localChange = Detach;
RefPtr<RenderStyle> newStyle;
if (currentStyle) {
// FIXME: This still recalcs style twice when changing display types, but saves
// us from recalcing twice when going from none -> anything else which is more
// common, especially during lazy attach.
newStyle = styleForRenderer();
localChange = Node::diff(currentStyle.get(), newStyle.get(), document());
} else if (attached() && isActiveInsertionPoint(this)) {
// Active InsertionPoints will never have renderers so there's no reason to
// reattach them repeatedly once they're already attached.
localChange = change;
}
if (localChange == Detach) {
AttachContext reattachContext;
reattachContext.resolvedStyle = newStyle.get();
reattach(reattachContext);
// attach recalculates the style for all children. No need to do it twice.
clearNeedsStyleRecalc();
clearChildNeedsStyleRecalc();
if (hasCustomStyleCallbacks())
didRecalcStyle(change);
return;
}
if (RenderObject* renderer = this->renderer()) {
if (localChange != NoChange || pseudoStyleCacheIsInvalid(currentStyle.get(), newStyle.get()) || (change == Force && renderer->requiresForcedStyleRecalcPropagation()) || styleChangeType() == SyntheticStyleChange)
renderer->setAnimatableStyle(newStyle.get());
else if (needsStyleRecalc()) {
// 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.
renderer->setStyleInternal(newStyle.get());
}
}
// 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()->styleSheetCollection()->usesRemUnits() && document()->documentElement() == this && localChange != NoChange && currentStyle && newStyle && currentStyle->fontSize() != newStyle->fontSize()) {
// Cached RenderStyles may depend on the re units.
document()->styleResolver()->invalidateMatchedPropertiesCache();
change = Force;
}
if (styleChangeType() == FullStyleChange)
change = Force;
else if (change != Force)
change = localChange;
}
StyleResolverParentPusher parentPusher(this);
// FIXME: This does not care about sibling combinators. Will be necessary in XBL2 world.
if (ElementShadow* shadow = this->shadow()) {
if (shouldRecalcStyle(change, shadow)) {
parentPusher.push();
shadow->recalcStyle(change);
}
}
if (shouldRecalcStyle(change, this))
updatePseudoElement(BEFORE, change);
// 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 = toElement(n);
bool childRulesChanged = element->needsStyleRecalc() && element->styleChangeType() == FullStyleChange;
if ((forceCheckOfNextElementSibling || forceCheckOfAnyElementSibling))
element->setNeedsStyleRecalc();
if (shouldRecalcStyle(change, element)) {
parentPusher.push();
element->recalcStyle(change);
}
forceCheckOfNextElementSibling = childRulesChanged && hasDirectAdjacentRules;
forceCheckOfAnyElementSibling = forceCheckOfAnyElementSibling || (childRulesChanged && hasIndirectAdjacentRules);
}
if (shouldRecalcStyle(change, this))
updatePseudoElement(AFTER, change);
clearNeedsStyleRecalc();
clearChildNeedsStyleRecalc();
if (hasCustomStyleCallbacks())
didRecalcStyle(change);
InspectorInstrumentation::didRecalculateStyleForElement(this);
}
ElementShadow* Element::shadow() const
{
return hasRareData() ? elementRareData()->shadow() : 0;
}
ElementShadow* Element::ensureShadow()
{
return ensureElementRareData()->ensureShadow();
}
void Element::didAffectSelector(AffectedSelectorMask mask)
{
setNeedsStyleRecalc();
if (ElementShadow* elementShadow = shadowOfParentForDistribution(this))
elementShadow->didAffectSelector(mask);
}
PassRefPtr<ShadowRoot> Element::createShadowRoot(ExceptionCode& ec)
{
if (alwaysCreateUserAgentShadowRoot())
ensureUserAgentShadowRoot();
if (RuntimeEnabledFeatures::authorShadowDOMForAnyElementEnabled())
return ensureShadow()->addShadowRoot(this, ShadowRoot::AuthorShadowRoot);
// Since some elements recreates shadow root dynamically, multiple shadow
// subtrees won't work well in that element. Until they are fixed, we disable
// adding author shadow root for them.
if (!areAuthorShadowsAllowed()) {
ec = HIERARCHY_REQUEST_ERR;
return 0;
}
return ensureShadow()->addShadowRoot(this, ShadowRoot::AuthorShadowRoot);
}
ShadowRoot* Element::shadowRoot() const
{
ElementShadow* elementShadow = shadow();
if (!elementShadow)
return 0;
ShadowRoot* shadowRoot = elementShadow->youngestShadowRoot();
if (shadowRoot->type() == ShadowRoot::AuthorShadowRoot)
return shadowRoot;
return 0;
}
ShadowRoot* Element::userAgentShadowRoot() const
{
if (ElementShadow* elementShadow = shadow()) {
if (ShadowRoot* shadowRoot = elementShadow->oldestShadowRoot()) {
ASSERT(shadowRoot->type() == ShadowRoot::UserAgentShadowRoot);
return shadowRoot;
}
}
return 0;
}
ShadowRoot* Element::ensureUserAgentShadowRoot()
{
if (ShadowRoot* shadowRoot = userAgentShadowRoot())
return shadowRoot;
ShadowRoot* shadowRoot = ensureShadow()->addShadowRoot(this, ShadowRoot::UserAgentShadowRoot);
didAddUserAgentShadowRoot(shadowRoot);
return shadowRoot;
}
const AtomicString& 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;
}
static void checkForEmptyStyleChange(Element* element, RenderStyle* style)
{
if (!style && !element->styleAffectedByEmpty())
return;
if (!style || (element->styleAffectedByEmpty() && (!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() && e->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 (e->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 (e->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 (e->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 ((e->childrenAffectedByForwardPositionalRules() && afterChange)
|| (e->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 (ElementShadow * shadow = this->shadow())
shadow->invalidateDistribution();
}
void Element::removeAllEventListeners()
{
ContainerNode::removeAllEventListeners();
if (ElementShadow* shadow = this->shadow())
shadow->removeAllEventListeners();
}
void Element::beginParsingChildren()
{
clearIsParsingChildrenFinished();
StyleResolver* styleResolver = document()->styleResolverIfExists();
if (styleResolver && attached())
styleResolver->pushParentElement(this);
}
void Element::finishParsingChildren()
{
ContainerNode::finishParsingChildren();
setIsParsingChildrenFinished();
checkForSiblingStyleChanges(this, renderStyle(), true, lastChild(), 0, 0);
if (StyleResolver* styleResolver = document()->styleResolverIfExists())
styleResolver->popParentElement(this);
}
#ifndef NDEBUG
void Element::formatForDebugger(char* buffer, unsigned length) const
{
StringBuilder result;
String s;
result.append(nodeName());
s = getIdAttribute();
if (s.length() > 0) {
if (result.length() > 0)
result.appendLiteral("; ");
result.appendLiteral("id=");
result.append(s);
}
s = getAttribute(classAttr);
if (s.length() > 0) {
if (result.length() > 0)
result.appendLiteral("; ");
result.appendLiteral("class=");
result.append(s);
}
strncpy(buffer, result.toString().utf8().data(), length - 1);
}
#endif
const Vector<RefPtr<Attr> >& Element::attrNodeList()
{
ASSERT(hasSyntheticAttrChildNodes());
return *attrNodeListForElement(this);
}
PassRefPtr<Attr> Element::setAttributeNode(Attr* attrNode, ExceptionCode& ec)
{
if (!attrNode) {
ec = TYPE_MISMATCH_ERR;
return 0;
}
RefPtr<Attr> oldAttrNode = attrIfExists(attrNode->qualifiedName());
if (oldAttrNode.get() == attrNode)
return attrNode; // This Attr is already attached to the element.
// 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 (attrNode->ownerElement()) {
ec = INUSE_ATTRIBUTE_ERR;
return 0;
}
synchronizeAllAttributes();
UniqueElementData* elementData = ensureUniqueElementData();
size_t index = elementData->getAttributeItemIndex(attrNode->qualifiedName());
if (index != notFound) {
if (oldAttrNode)
detachAttrNodeFromElementWithValue(oldAttrNode.get(), elementData->attributeItem(index)->value());
else
oldAttrNode = Attr::create(document(), attrNode->qualifiedName(), elementData->attributeItem(index)->value());
}
setAttributeInternal(index, attrNode->qualifiedName(), attrNode->value(), NotInSynchronizationOfLazyAttribute);
attrNode->attachToElement(this);
ensureAttrNodeListForElement(this)->append(attrNode);
return oldAttrNode.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());
synchronizeAttribute(attr->qualifiedName());
size_t index = elementData()->getAttrIndex(attr);
if (index == notFound) {
ec = NOT_FOUND_ERR;
return 0;
}
RefPtr<Attr> guard(attr);
detachAttrNodeAtIndex(attr, index);
return guard.release();
}
bool Element::parseAttributeName(QualifiedName& out, const AtomicString& namespaceURI, const AtomicString& qualifiedName, ExceptionCode& ec)
{
String prefix, localName;
if (!Document::parseQualifiedName(qualifiedName, prefix, localName, ec))
return false;
ASSERT(!ec);
QualifiedName qName(prefix, localName, namespaceURI);
if (!Document::hasValidNamespaceForAttributes(qName)) {
ec = NAMESPACE_ERR;
return false;
}
out = qName;
return true;
}
void Element::setAttributeNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, const AtomicString& value, ExceptionCode& ec)
{
QualifiedName parsedName = anyName;
if (!parseAttributeName(parsedName, namespaceURI, qualifiedName, ec))
return;
setAttribute(parsedName, value);
}
void Element::removeAttributeInternal(size_t index, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
{
ASSERT_WITH_SECURITY_IMPLICATION(index < attributeCount());
UniqueElementData* elementData = ensureUniqueElementData();
QualifiedName name = elementData->attributeItem(index)->name();
AtomicString valueBeingRemoved = elementData->attributeItem(index)->value();
if (!inSynchronizationOfLazyAttribute) {
if (!valueBeingRemoved.isNull())
willModifyAttribute(name, valueBeingRemoved, nullAtom);
}
if (RefPtr<Attr> attrNode = attrIfExists(name))
detachAttrNodeFromElementWithValue(attrNode.get(), elementData->attributeItem(index)->value());
elementData->removeAttribute(index);
if (!inSynchronizationOfLazyAttribute)
didRemoveAttribute(name);
}
void Element::addAttributeInternal(const QualifiedName& name, const AtomicString& value, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
{
if (!inSynchronizationOfLazyAttribute)
willModifyAttribute(name, nullAtom, value);
ensureUniqueElementData()->addAttribute(name, value);
if (!inSynchronizationOfLazyAttribute)
didAddAttribute(name, value);
}
void Element::removeAttribute(const AtomicString& name)
{
if (!elementData())
return;
AtomicString localName = shouldIgnoreAttributeCase(this) ? name.lower() : name;
size_t index = elementData()->getAttributeItemIndex(localName, false);
if (index == notFound) {
if (UNLIKELY(localName == styleAttr) && elementData()->m_styleAttributeIsDirty && isStyledElement())
static_cast<StyledElement*>(this)->removeAllInlineStyleProperties();
return;
}
removeAttributeInternal(index, NotInSynchronizationOfLazyAttribute);
}
void Element::removeAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName)
{
removeAttribute(QualifiedName(nullAtom, localName, namespaceURI));
}
PassRefPtr<Attr> Element::getAttributeNode(const AtomicString& localName)
{
if (!elementData())
return 0;
synchronizeAttribute(localName);
const Attribute* attribute = elementData()->getAttributeItem(localName, shouldIgnoreAttributeCase(this));
if (!attribute)
return 0;
return ensureAttr(attribute->name());
}
PassRefPtr<Attr> Element::getAttributeNodeNS(const AtomicString& namespaceURI, const AtomicString& localName)
{
if (!elementData())
return 0;
QualifiedName qName(nullAtom, localName, namespaceURI);
synchronizeAttribute(qName);
const Attribute* attribute = elementData()->getAttributeItem(qName);
if (!attribute)
return 0;
return ensureAttr(attribute->name());
}
bool Element::hasAttribute(const AtomicString& localName) const
{
if (!elementData())
return false;
synchronizeAttribute(localName);
return elementData()->getAttributeItem(shouldIgnoreAttributeCase(this) ? localName.lower() : localName, false);
}
bool Element::hasAttributeNS(const AtomicString& namespaceURI, const AtomicString& localName) const
{
if (!elementData())
return false;
QualifiedName qName(nullAtom, localName, namespaceURI);
synchronizeAttribute(qName);
return elementData()->getAttributeItem(qName);
}
CSSStyleDeclaration *Element::style()
{
return 0;
}
void Element::focus(bool restorePreviousSelection, FocusDirection direction)
{
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(), direction))
return;
}
// Setting the focused node above might have invalidated the layout due to scripts.
doc->updateLayoutIgnorePendingStylesheets();
if (!isFocusable()) {
ensureElementRareData()->setNeedsFocusAppearanceUpdateSoonAfterAttach(true);
return;
}
cancelFocusAppearanceUpdate();
updateFocusAppearance(restorePreviousSelection);
}
void Element::updateFocusAppearance(bool /*restorePreviousSelection*/)
{
if (isRootEditableElement()) {
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()->scrollRectToVisible(boundingBox());
}
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();
}
const AtomicString& Element::pseudo() const
{
return getAttribute(pseudoAttr);
}
void Element::setPseudo(const AtomicString& value)
{
setAttribute(pseudoAttr, value);
}
LayoutSize Element::minimumSizeForResizing() const
{
return hasRareData() ? elementRareData()->minimumSizeForResizing() : defaultMinimumSizeForResizing();
}
void Element::setMinimumSizeForResizing(const LayoutSize& size)
{
if (!hasRareData() && size == defaultMinimumSizeForResizing())
return;
ensureElementRareData()->setMinimumSizeForResizing(size);
}
RenderStyle* Element::computedStyle(PseudoId pseudoElementSpecifier)
{
if (PseudoElement* element = pseudoElement(pseudoElementSpecifier))
return element->computedStyle();
// 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 = ensureElementRareData();
if (!data->computedStyle())
data->setComputedStyle(document()->styleForElementIgnoringPendingStylesheets(this));
return pseudoElementSpecifier ? data->computedStyle()->getCachedPseudoStyle(pseudoElementSpecifier) : data->computedStyle();
}
void Element::setStyleAffectedByEmpty()
{
ensureElementRareData()->setStyleAffectedByEmpty(true);
}
void Element::setChildrenAffectedByHover(bool value)
{
if (value || hasRareData())
ensureElementRareData()->setChildrenAffectedByHover(value);
}
void Element::setChildrenAffectedByActive(bool value)
{
if (value || hasRareData())
ensureElementRareData()->setChildrenAffectedByActive(value);
}
void Element::setChildrenAffectedByDrag(bool value)
{
if (value || hasRareData())
ensureElementRareData()->setChildrenAffectedByDrag(value);
}
void Element::setChildrenAffectedByFirstChildRules()
{
ensureElementRareData()->setChildrenAffectedByFirstChildRules(true);
}
void Element::setChildrenAffectedByLastChildRules()
{
ensureElementRareData()->setChildrenAffectedByLastChildRules(true);
}
void Element::setChildrenAffectedByDirectAdjacentRules()
{
ensureElementRareData()->setChildrenAffectedByDirectAdjacentRules(true);
}
void Element::setChildrenAffectedByForwardPositionalRules()
{
ensureElementRareData()->setChildrenAffectedByForwardPositionalRules(true);
}
void Element::setChildrenAffectedByBackwardPositionalRules()
{
ensureElementRareData()->setChildrenAffectedByBackwardPositionalRules(true);
}
void Element::setChildIndex(unsigned index)
{
ElementRareData* rareData = ensureElementRareData();
if (RenderStyle* style = renderStyle())
style->setUnique();
rareData->setChildIndex(index);
}
bool Element::hasFlagsSetDuringStylingOfChildren() const
{
if (!hasRareData())
return false;
return rareDataChildrenAffectedByHover()
|| rareDataChildrenAffectedByActive()
|| rareDataChildrenAffectedByDrag()
|| rareDataChildrenAffectedByFirstChildRules()
|| rareDataChildrenAffectedByLastChildRules()
|| rareDataChildrenAffectedByDirectAdjacentRules()
|| rareDataChildrenAffectedByForwardPositionalRules()
|| rareDataChildrenAffectedByBackwardPositionalRules();
}
bool Element::rareDataStyleAffectedByEmpty() const
{
ASSERT(hasRareData());
return elementRareData()->styleAffectedByEmpty();
}
bool Element::rareDataChildrenAffectedByHover() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByHover();
}
bool Element::rareDataChildrenAffectedByActive() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByActive();
}
bool Element::rareDataChildrenAffectedByDrag() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByDrag();
}
bool Element::rareDataChildrenAffectedByFirstChildRules() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByFirstChildRules();
}
bool Element::rareDataChildrenAffectedByLastChildRules() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByLastChildRules();
}
bool Element::rareDataChildrenAffectedByDirectAdjacentRules() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByDirectAdjacentRules();
}
bool Element::rareDataChildrenAffectedByForwardPositionalRules() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByForwardPositionalRules();
}
bool Element::rareDataChildrenAffectedByBackwardPositionalRules() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByBackwardPositionalRules();
}
unsigned Element::rareDataChildIndex() const
{
ASSERT(hasRareData());
return elementRareData()->childIndex();
}
void Element::setIsInCanvasSubtree(bool isInCanvasSubtree)
{
ensureElementRareData()->setIsInCanvasSubtree(isInCanvasSubtree);
}
bool Element::isInCanvasSubtree() const
{
return hasRareData() && elementRareData()->isInCanvasSubtree();
}
bool Element::isUnresolvedCustomElement()
{
return isCustomElement() && document()->registry()->isUnresolved(this);
}
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.
do {
if (n->isElementNode()) {
if (const ElementData* elementData = toElement(n)->elementData()) {
// Spec: xml:lang takes precedence -- http://www.w3.org/TR/xhtml1/#C_7
if (const Attribute* attribute = elementData->getAttributeItem(XMLNames::langAttr))
value = attribute->value();
else if (const Attribute* attribute = elementData->getAttributeItem(HTMLNames::langAttr))
value = attribute->value();
}
} else if (n->isDocumentNode()) {
// checking the MIME content-language
value = toDocument(n)->contentLanguage();
}
n = n->parentNode();
} while (n && value.isNull());
return value;
}
Locale& Element::locale() const
{
return document()->getCachedLocale(computeInheritedLanguage());
}
void Element::cancelFocusAppearanceUpdate()
{
if (hasRareData())
elementRareData()->setNeedsFocusAppearanceUpdateSoonAfterAttach(false);
if (document()->focusedNode() == this)
document()->cancelFocusAppearanceUpdate();
}
void Element::normalizeAttributes()
{
if (!hasAttributes())
return;
for (unsigned i = 0; i < attributeCount(); ++i) {
if (RefPtr<Attr> attr = attrIfExists(attributeItem(i)->name()))
attr->normalize();
}
}
void Element::updatePseudoElement(PseudoId pseudoId, StyleChange change)
{
PseudoElement* element = pseudoElement(pseudoId);
if (element && (needsStyleRecalc() || shouldRecalcStyle(change, element))) {
// PseudoElement styles hang off their parent element's style so if we needed
// a style recalc we should Force one on the pseudo.
element->recalcStyle(needsStyleRecalc() ? Force : change);
// Wait until our parent is not displayed or pseudoElementRendererIsNeeded
// is false, otherwise we could continously create and destroy PseudoElements
// when RenderObject::isChildAllowed on our parent returns false for the
// PseudoElement's renderer for each style recalc.
if (!renderer() || !pseudoElementRendererIsNeeded(renderer()->getCachedPseudoStyle(pseudoId)))
elementRareData()->setPseudoElement(pseudoId, 0);
} else if (change >= Inherit || needsStyleRecalc())
createPseudoElementIfNeeded(pseudoId);
}
void Element::createPseudoElementIfNeeded(PseudoId pseudoId)
{
if (!document()->styleSheetCollection()->usesBeforeAfterRules())
return;
if (!renderer() || !pseudoElementRendererIsNeeded(renderer()->getCachedPseudoStyle(pseudoId)))
return;
if (!renderer()->canHaveGeneratedChildren())
return;
ASSERT(!isPseudoElement());
RefPtr<PseudoElement> element = PseudoElement::create(this, pseudoId);
element->attach();
ensureElementRareData()->setPseudoElement(pseudoId, element.release());
}
PseudoElement* Element::pseudoElement(PseudoId pseudoId) const
{
return hasRareData() ? elementRareData()->pseudoElement(pseudoId) : 0;
}
RenderObject* Element::pseudoElementRenderer(PseudoId pseudoId) const
{
if (PseudoElement* element = pseudoElement(pseudoId))
return element->renderer();
return 0;
}
bool Element::matchesReadOnlyPseudoClass() const
{
return false;
}
bool Element::matchesReadWritePseudoClass() const
{
return false;
}
bool Element::webkitMatchesSelector(const String& selector, ExceptionCode& ec)
{
if (selector.isEmpty()) {
ec = SYNTAX_ERR;
return false;
}
SelectorQuery* selectorQuery = document()->selectorQueryCache()->add(selector, document(), ec);
if (!selectorQuery)
return false;
return selectorQuery->matches(this);
}
bool Element::shouldAppearIndeterminate() const
{
return false;
}
DOMTokenList* Element::classList()
{
ElementRareData* data = ensureElementRareData();
if (!data->classList())
data->setClassList(ClassList::create(this));
return data->classList();
}
DOMStringMap* Element::dataset()
{
ElementRareData* data = ensureElementRareData();
if (!data->dataset())
data->setDataset(DatasetDOMStringMap::create(this));
return data->dataset();
}
KURL Element::getURLAttribute(const QualifiedName& name) const
{
#if !ASSERT_DISABLED
if (elementData()) {
if (const 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 (elementData()) {
if (const 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));
}
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 ContainerNode::childShouldCreateRenderer(childContext);
}
void Element::webkitRequestFullscreen()
{
FullscreenController::from(document())->requestFullScreenForElement(this, ALLOW_KEYBOARD_INPUT, FullscreenController::EnforceIFrameAllowFullScreenRequirement);
}
void Element::webkitRequestFullScreen(unsigned short flags)
{
FullscreenController::from(document())->requestFullScreenForElement(this, (flags | LEGACY_MOZILLA_REQUEST), FullscreenController::EnforceIFrameAllowFullScreenRequirement);
}
bool Element::containsFullScreenElement() const
{
return hasRareData() && elementRareData()->containsFullScreenElement();
}
void Element::setContainsFullScreenElement(bool flag)
{
ensureElementRareData()->setContainsFullScreenElement(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);
}
bool Element::isInTopLayer() const
{
return hasRareData() && elementRareData()->isInTopLayer();
}
void Element::setIsInTopLayer(bool inTopLayer)
{
if (isInTopLayer() == inTopLayer)
return;
ensureElementRareData()->setIsInTopLayer(inTopLayer);
// We must ensure a reattach occurs so the renderer is inserted in the correct sibling order under RenderView according to its
// top layer position, or in its usual place if not in the top layer.
lazyReattachIfAttached();
}
void Element::webkitRequestPointerLock()
{
if (document()->page())
document()->page()->pointerLockController()->requestPointerLock(this);
}
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
{
for (const Element* element = this; element; element = element->parentOrShadowHostElement()) {
switch (element->spellcheckAttributeState()) {
case SpellcheckAttributeTrue:
return true;
case SpellcheckAttributeFalse:
return false;
case SpellcheckAttributeDefault:
break;
}
}
return true;
}
RenderRegion* Element::renderRegion() const
{
if (renderer() && renderer()->isRenderRegion())
return toRenderRegion(renderer());
return 0;
}
const AtomicString& Element::webkitRegionOverset() const
{
document()->updateLayoutIgnorePendingStylesheets();
DEFINE_STATIC_LOCAL(AtomicString, undefinedState, ("undefined", AtomicString::ConstructFromLiteral));
if (!RuntimeEnabledFeatures::cssRegionsEnabled() || !renderRegion())
return undefinedState;
switch (renderRegion()->regionState()) {
case RenderRegion::RegionFit: {
DEFINE_STATIC_LOCAL(AtomicString, fitState, ("fit", AtomicString::ConstructFromLiteral));
return fitState;
}
case RenderRegion::RegionEmpty: {
DEFINE_STATIC_LOCAL(AtomicString, emptyState, ("empty", AtomicString::ConstructFromLiteral));
return emptyState;
}
case RenderRegion::RegionOverset: {
DEFINE_STATIC_LOCAL(AtomicString, overflowState, ("overset", AtomicString::ConstructFromLiteral));
return overflowState;
}
case RenderRegion::RegionUndefined:
return undefinedState;
}
ASSERT_NOT_REACHED();
return undefinedState;
}
Vector<RefPtr<Range> > Element::webkitGetRegionFlowRanges() const
{
document()->updateLayoutIgnorePendingStylesheets();
Vector<RefPtr<Range> > rangeObjects;
if (RuntimeEnabledFeatures::cssRegionsEnabled() && renderer() && renderer()->isRenderRegion()) {
RenderRegion* region = toRenderRegion(renderer());
if (region->isValid())
region->getRanges(rangeObjects);
}
return rangeObjects;
}
#ifndef NDEBUG
bool Element::fastAttributeLookupAllowed(const QualifiedName& name) const
{
if (name == HTMLNames::styleAttr)
return false;
if (isSVGElement())
return !static_cast<const SVGElement*>(this)->isAnimatableAttribute(name);
return true;
}
#endif
#ifdef DUMP_NODE_STATISTICS
bool Element::hasNamedNodeMap() const
{
return hasRareData() && elementRareData()->attributeMap();
}
#endif
inline void Element::updateName(const AtomicString& oldName, const AtomicString& newName)
{
if (!inDocument() || isInShadowTree())
return;
if (oldName == newName)
return;
if (shouldRegisterAsNamedItem())
updateNamedItemRegistration(oldName, newName);
}
inline void Element::updateId(const AtomicString& oldId, const AtomicString& newId)
{
if (!isInTreeScope())
return;
if (oldId == newId)
return;
updateId(treeScope(), oldId, newId);
}
inline void Element::updateId(TreeScope* scope, const AtomicString& oldId, const AtomicString& newId)
{
ASSERT(isInTreeScope());
ASSERT(oldId != newId);
if (!oldId.isEmpty())
scope->removeElementById(oldId, this);
if (!newId.isEmpty())
scope->addElementById(newId, this);
if (shouldRegisterAsExtraNamedItem())
updateExtraNamedItemRegistration(oldId, newId);
}
void Element::updateLabel(TreeScope* scope, const AtomicString& oldForAttributeValue, const AtomicString& newForAttributeValue)
{
ASSERT(hasTagName(labelTag));
if (!inDocument())
return;
if (oldForAttributeValue == newForAttributeValue)
return;
if (!oldForAttributeValue.isEmpty())
scope->removeLabel(oldForAttributeValue, static_cast<HTMLLabelElement*>(this));
if (!newForAttributeValue.isEmpty())
scope->addLabel(newForAttributeValue, static_cast<HTMLLabelElement*>(this));
}
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);
else if (name == HTMLNames::forAttr && hasTagName(labelTag)) {
TreeScope* scope = treeScope();
if (scope->shouldCacheLabelsByForAttribute())
updateLabel(scope, oldValue, newValue);
}
if (oldValue != newValue) {
if (attached() && document()->styleResolver() && document()->styleResolver()->hasSelectorForAttribute(name.localName()))
setNeedsStyleRecalc();
}
if (OwnPtr<MutationObserverInterestGroup> 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 AtomicString& value)
{
attributeChanged(name, value);
InspectorInstrumentation::didModifyDOMAttr(document(), this, name.localName(), value);
dispatchSubtreeModifiedEvent();
}
void Element::didModifyAttribute(const QualifiedName& name, const AtomicString& value)
{
attributeChanged(name, value);
InspectorInstrumentation::didModifyDOMAttr(document(), this, name.localName(), value);
// Do not dispatch a DOMSubtreeModified event here; see bug 81141.
}
void Element::didRemoveAttribute(const QualifiedName& name)
{
attributeChanged(name, nullAtom);
InspectorInstrumentation::didRemoveDOMAttr(document(), this, name.localName());
dispatchSubtreeModifiedEvent();
}
void Element::updateNamedItemRegistration(const AtomicString& oldName, const AtomicString& newName)
{
if (!document()->isHTMLDocument())
return;
if (!oldName.isEmpty())
toHTMLDocument(document())->removeNamedItem(oldName);
if (!newName.isEmpty())
toHTMLDocument(document())->addNamedItem(newName);
}
void Element::updateExtraNamedItemRegistration(const AtomicString& oldId, const AtomicString& newId)
{
if (!document()->isHTMLDocument())
return;
if (!oldId.isEmpty())
toHTMLDocument(document())->removeExtraNamedItem(oldId);
if (!newId.isEmpty())
toHTMLDocument(document())->addExtraNamedItem(newId);
}
PassRefPtr<HTMLCollection> Element::ensureCachedHTMLCollection(CollectionType type)
{
if (HTMLCollection* collection = cachedHTMLCollection(type))
return collection;
RefPtr<HTMLCollection> collection;
if (type == TableRows) {
ASSERT(hasTagName(tableTag));
return ensureRareData()->ensureNodeLists()->addCacheWithAtomicName<HTMLTableRowsCollection>(this, type);
} else if (type == SelectOptions) {
ASSERT(hasTagName(selectTag));
return ensureRareData()->ensureNodeLists()->addCacheWithAtomicName<HTMLOptionsCollection>(this, type);
} else if (type == FormControls) {
ASSERT(hasTagName(formTag) || hasTagName(fieldsetTag));
return ensureRareData()->ensureNodeLists()->addCacheWithAtomicName<HTMLFormControlsCollection>(this, type);
}
return ensureRareData()->ensureNodeLists()->addCacheWithAtomicName<HTMLCollection>(this, type);
}
static void needsSyntheticStyleChangeCallback(Node* node)
{
node->setNeedsStyleRecalc(SyntheticStyleChange);
}
void Element::scheduleSyntheticStyleChange()
{
if (postAttachCallbacksAreSuspended())
queuePostAttachCallback(needsSyntheticStyleChangeCallback, this);
else
setNeedsStyleRecalc(SyntheticStyleChange);
}
HTMLCollection* Element::cachedHTMLCollection(CollectionType type)
{
return hasRareData() && rareData()->nodeLists() ? rareData()->nodeLists()->cacheWithAtomicName<HTMLCollection>(type) : 0;
}
IntSize Element::savedLayerScrollOffset() const
{
return hasRareData() ? elementRareData()->savedLayerScrollOffset() : IntSize();
}
void Element::setSavedLayerScrollOffset(const IntSize& size)
{
if (size.isZero() && !hasRareData())
return;
ensureElementRareData()->setSavedLayerScrollOffset(size);
}
PassRefPtr<Attr> Element::attrIfExists(const QualifiedName& name)
{
if (AttrNodeList* attrNodeList = attrNodeListForElement(this))
return findAttrNodeInList(attrNodeList, name);
return 0;
}
PassRefPtr<Attr> Element::ensureAttr(const QualifiedName& name)
{
AttrNodeList* attrNodeList = ensureAttrNodeListForElement(this);
RefPtr<Attr> attrNode = findAttrNodeInList(attrNodeList, name);
if (!attrNode) {
attrNode = Attr::create(this, name);
treeScope()->adoptIfNeeded(attrNode.get());
attrNodeList->append(attrNode);
}
return attrNode.release();
}
void Element::detachAttrNodeFromElementWithValue(Attr* attrNode, const AtomicString& value)
{
ASSERT(hasSyntheticAttrChildNodes());
attrNode->detachFromElementWithValue(value);
AttrNodeList* attrNodeList = attrNodeListForElement(this);
for (unsigned i = 0; i < attrNodeList->size(); ++i) {
if (attrNodeList->at(i)->qualifiedName() == attrNode->qualifiedName()) {
attrNodeList->remove(i);
if (attrNodeList->isEmpty())
removeAttrNodeListForElement(this);
return;
}
}
ASSERT_NOT_REACHED();
}
void Element::detachAllAttrNodesFromElement()
{
AttrNodeList* attrNodeList = attrNodeListForElement(this);
ASSERT(attrNodeList);
for (unsigned i = 0; i < attributeCount(); ++i) {
const Attribute* attribute = attributeItem(i);
if (RefPtr<Attr> attrNode = findAttrNodeInList(attrNodeList, attribute->name()))
attrNode->detachFromElementWithValue(attribute->value());
}
removeAttrNodeListForElement(this);
}
void Element::willRecalcStyle(StyleChange)
{
ASSERT(hasCustomStyleCallbacks());
}
void Element::didRecalcStyle(StyleChange)
{
ASSERT(hasCustomStyleCallbacks());
}
PassRefPtr<RenderStyle> Element::customStyleForRenderer()
{
ASSERT(hasCustomStyleCallbacks());
return 0;
}
void Element::cloneAttributesFromElement(const Element& other)
{
if (hasSyntheticAttrChildNodes())
detachAllAttrNodesFromElement();
other.synchronizeAllAttributes();
if (!other.m_elementData) {
m_elementData.clear();
return;
}
const AtomicString& oldID = getIdAttribute();
const AtomicString& newID = other.getIdAttribute();
if (!oldID.isNull() || !newID.isNull())
updateId(oldID, newID);
const AtomicString& oldName = getNameAttribute();
const AtomicString& 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 (other.m_elementData->isUnique()
&& !other.m_elementData->presentationAttributeStyle()
&& (!other.m_elementData->inlineStyle() || !other.m_elementData->inlineStyle()->hasCSSOMWrapper()))
const_cast<Element&>(other).m_elementData = static_cast<const UniqueElementData*>(other.m_elementData.get())->makeShareableCopy();
if (!other.m_elementData->isUnique())
m_elementData = other.m_elementData;
else
m_elementData = other.m_elementData->makeUniqueCopy();
for (unsigned i = 0; i < m_elementData->length(); ++i) {
const Attribute* attribute = const_cast<const ElementData*>(m_elementData.get())->attributeItem(i);
attributeChangedFromParserOrByCloning(attribute->name(), attribute->value(), ModifiedByCloning);
}
}
void Element::cloneDataFromElement(const Element& other)
{
cloneAttributesFromElement(other);
copyNonAttributePropertiesFromElement(other);
}
void Element::createUniqueElementData()
{
if (!m_elementData)
m_elementData = UniqueElementData::create();
else {
ASSERT(!m_elementData->isUnique());
m_elementData = static_cast<ShareableElementData*>(m_elementData.get())->makeUniqueCopy();
}
}
void Element::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
{
MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::DOM);
ContainerNode::reportMemoryUsage(memoryObjectInfo);
info.addMember(m_tagName, "tagName");
info.addMember(m_elementData, "elementData");
}
InputMethodContext* Element::getInputContext()
{
return ensureElementRareData()->ensureInputMethodContext(toHTMLElement(this));
}
bool Element::hasPendingResources() const
{
return hasRareData() && elementRareData()->hasPendingResources();
}
void Element::setHasPendingResources()
{
ensureElementRareData()->setHasPendingResources(true);
}
void Element::clearHasPendingResources()
{
ensureElementRareData()->setHasPendingResources(false);
}
void ElementData::deref()
{
if (!derefBase())
return;
if (m_isUnique)
delete static_cast<UniqueElementData*>(this);
else
delete static_cast<ShareableElementData*>(this);
}
ElementData::ElementData()
: m_isUnique(true)
, m_arraySize(0)
, m_presentationAttributeStyleIsDirty(false)