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chromium / chromium / blink / 5b06b91b79098f7d42e480f85be32198315d2440 / . / Source / core / dom / Element.cpp
blob: 4df0e40593ff1b2113b0e186ed69722c7b247af6 [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 "CSSValueKeywords.h"
#include "RuntimeEnabledFeatures.h"
#include "SVGNames.h"
#include "XMLNames.h"
#include "bindings/v8/Dictionary.h"
#include "bindings/v8/ExceptionState.h"
#include "core/accessibility/AXObjectCache.h"
#include "core/animation/DocumentTimeline.h"
#include "core/animation/css/CSSAnimations.h"
#include "core/css/CSSStyleSheet.h"
#include "core/css/CSSValuePool.h"
#include "core/css/PropertySetCSSStyleDeclaration.h"
#include "core/css/StylePropertySet.h"
#include "core/css/parser/BisonCSSParser.h"
#include "core/css/resolver/StyleResolver.h"
#include "core/dom/Attr.h"
#include "core/dom/CSSSelectorWatch.h"
#include "core/dom/ClientRect.h"
#include "core/dom/ClientRectList.h"
#include "core/dom/DatasetDOMStringMap.h"
#include "core/dom/ElementDataCache.h"
#include "core/dom/ElementRareData.h"
#include "core/dom/ExceptionCode.h"
#include "core/dom/FullscreenElementStack.h"
#include "core/dom/MutationObserverInterestGroup.h"
#include "core/dom/MutationRecord.h"
#include "core/dom/NamedNodeMap.h"
#include "core/dom/NodeRenderStyle.h"
#include "core/dom/PostAttachCallbacks.h"
#include "core/dom/PresentationAttributeStyle.h"
#include "core/dom/PseudoElement.h"
#include "core/dom/RenderTreeBuilder.h"
#include "core/dom/ScriptableDocumentParser.h"
#include "core/dom/SelectorQuery.h"
#include "core/dom/Text.h"
#include "core/dom/custom/CustomElement.h"
#include "core/dom/custom/CustomElementRegistrationContext.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/editing/markup.h"
#include "core/events/EventDispatcher.h"
#include "core/events/FocusEvent.h"
#include "core/frame/ContentSecurityPolicy.h"
#include "core/frame/Frame.h"
#include "core/frame/FrameView.h"
#include "core/frame/UseCounter.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/HTMLTemplateElement.h"
#include "core/html/parser/HTMLParserIdioms.h"
#include "core/inspector/InspectorInstrumentation.h"
#include "core/page/FocusController.h"
#include "core/page/Page.h"
#include "core/page/PointerLockController.h"
#include "core/rendering/FlowThreadController.h"
#include "core/rendering/RenderLayer.h"
#include "core/rendering/RenderNamedFlowFragment.h"
#include "core/rendering/RenderView.h"
#include "core/rendering/RenderWidget.h"
#include "core/svg/SVGDocumentExtensions.h"
#include "core/svg/SVGElement.h"
#include "platform/scroll/ScrollableArea.h"
#include "wtf/BitVector.h"
#include "wtf/HashFunctions.h"
#include "wtf/text/CString.h"
#include "wtf/text/StringBuilder.h"
#include "wtf/text/TextPosition.h"
namespace WebCore {
using namespace HTMLNames;
using namespace XMLNames;
class StyleResolverParentPusher {
public:
explicit StyleResolverParentPusher(Element& parent)
: m_parent(parent)
, m_pushedStyleResolver(0)
{
}
void push()
{
if (m_pushedStyleResolver)
return;
m_pushedStyleResolver = &m_parent.document().ensureStyleResolver();
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;
}
static void removeAttrNodeListForElement(Element* element)
{
ASSERT(element->hasSyntheticAttrChildNodes());
ASSERT(attrNodeListMap().contains(element));
attrNodeListMap().remove(element);
element->setHasSyntheticAttrChildNodes(false);
}
static Attr* findAttrNodeInList(const AttrNodeList& attrNodeList, const QualifiedName& name)
{
AttrNodeList::const_iterator end = attrNodeList.end();
for (AttrNodeList::const_iterator it = attrNodeList.begin(); it != end; ++it) {
if ((*it)->qualifiedName() == name)
return it->get();
}
return 0;
}
PassRefPtr<Element> Element::create(const QualifiedName& tagName, Document* document)
{
return adoptRef(new Element(tagName, document, CreateElement));
}
Element::~Element()
{
// 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(!document().renderView() || !inNamedFlow());
ASSERT(needsAttach());
if (hasRareData())
elementRareData()->clearShadow();
if (isCustomElement())
CustomElement::wasDestroyed(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::setFocusedElement that would currently fail on
// them. See crbug.com/251163
if (!renderer()) {
// 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;
}
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 == kNotFound)
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();
}
ActiveAnimations* Element::activeAnimations() const
{
if (hasRareData())
return elementRareData()->activeAnimations();
return 0;
}
ActiveAnimations* Element::ensureActiveAnimations()
{
ElementRareData& rareData = ensureElementRareData();
if (!rareData.activeAnimations())
rareData.setActiveAnimations(adoptPtr(new ActiveAnimations()));
return rareData.activeAnimations();
}
bool Element::hasActiveAnimations() const
{
if (!hasRareData())
return false;
ActiveAnimations* activeAnimations = elementRareData()->activeAnimations();
return activeAnimations && !activeAnimations->isEmpty();
}
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;
// NOTE: anyAttributeMatches in SelectorChecker.cpp
// currently assumes that all lazy attributes have a null namespace.
// If that ever changes we'll need to fix that code.
if (elementData()->m_styleAttributeIsDirty) {
ASSERT(isStyledElement());
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());
synchronizeStyleAttributeInternal();
return;
}
if (UNLIKELY(elementData()->m_animatedSVGAttributesAreDirty)) {
ASSERT(isSVGElement());
// See comment in the AtomicString version of synchronizeAttribute()
// also.
toSVGElement(this)->synchronizeAnimatedSVGAttribute(name);
}
}
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())) {
ASSERT(isStyledElement());
synchronizeStyleAttributeInternal();
return;
}
if (elementData()->m_animatedSVGAttributesAreDirty) {
// We're not passing a namespace argument on purpose. SVGNames::*Attr are defined w/o namespaces as well.
// FIXME: this code is called regardless of whether name is an
// animated SVG Attribute. It would seem we should only call this method
// if SVGElement::isAnimatableAttribute is true, but the list of
// animatable attributes in isAnimatableAttribute does not suffice to
// pass all layout tests. Also, m_animatedSVGAttributesAreDirty stays
// dirty unless synchronizeAnimatedSVGAttribute is called with
// anyQName(). This means that even if Element::synchronizeAttribute()
// is called on all attributes, m_animatedSVGAttributesAreDirty remains
// true.
toSVGElement(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;
}
toRenderBox(renderer())->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 int adjustForLocalZoom(LayoutUnit value, RenderObject& renderer)
{
float zoomFactor = localZoomForRenderer(renderer);
if (zoomFactor == 1)
return value;
return lroundf(value / zoomFactor);
}
int Element::offsetLeft()
{
document().partialUpdateLayoutIgnorePendingStylesheets(this);
if (RenderBoxModelObject* renderer = renderBoxModelObject())
return adjustForLocalZoom(renderer->pixelSnappedOffsetLeft(), *renderer);
return 0;
}
int Element::offsetTop()
{
document().partialUpdateLayoutIgnorePendingStylesheets(this);
if (RenderBoxModelObject* renderer = renderBoxModelObject())
return adjustForLocalZoom(renderer->pixelSnappedOffsetTop(), *renderer);
return 0;
}
int Element::offsetWidth()
{
document().updateStyleForNodeIfNeeded(this);
if (RenderBox* renderer = renderBox()) {
if (renderer->canDetermineWidthWithoutLayout())
return adjustLayoutUnitForAbsoluteZoom(renderer->fixedOffsetWidth(), *renderer).round();
}
document().partialUpdateLayoutIgnorePendingStylesheets(this);
if (RenderBoxModelObject* renderer = renderBoxModelObject())
return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedOffsetWidth(), *renderer).round();
return 0;
}
int Element::offsetHeight()
{
document().partialUpdateLayoutIgnorePendingStylesheets(this);
if (RenderBoxModelObject* renderer = renderBoxModelObject())
return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedOffsetHeight(), *renderer).round();
return 0;
}
Element* Element::offsetParentForBindings()
{
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->layoutSize().width(), 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->layoutSize().height(), renderView);
}
}
if (RenderBox* renderer = renderBox())
return adjustLayoutUnitForAbsoluteZoom(renderer->pixelSnappedClientHeight(), *renderer).round();
return 0;
}
int Element::scrollLeft()
{
document().updateLayoutIgnorePendingStylesheets();
if (document().documentElement() != this) {
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollLeft(), rend);
return 0;
}
if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
if (document().inQuirksMode())
return 0;
if (FrameView* view = document().view()) {
if (RenderView* renderView = document().renderView())
return adjustForAbsoluteZoom(view->scrollX(), renderView);
}
}
return 0;
}
int Element::scrollTop()
{
document().updateLayoutIgnorePendingStylesheets();
if (document().documentElement() != this) {
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollTop(), rend);
return 0;
}
if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
if (document().inQuirksMode())
return 0;
if (FrameView* view = document().view()) {
if (RenderView* renderView = document().renderView())
return adjustForAbsoluteZoom(view->scrollY(), renderView);
}
}
return 0;
}
void Element::setScrollLeft(int newLeft)
{
document().updateLayoutIgnorePendingStylesheets();
if (document().documentElement() != this) {
if (RenderBox* rend = renderBox())
rend->setScrollLeft(static_cast<int>(newLeft * rend->style()->effectiveZoom()));
return;
}
if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
if (document().inQuirksMode())
return;
Frame* frame = document().frame();
if (!frame)
return;
FrameView* view = frame->view();
if (!view)
return;
view->setScrollPosition(IntPoint(static_cast<int>(newLeft * frame->pageZoomFactor()), view->scrollY()));
}
}
void Element::setScrollLeft(const Dictionary& scrollOptionsHorizontal, ExceptionState& exceptionState)
{
String scrollBehaviorString;
ScrollBehavior scrollBehavior = ScrollBehaviorAuto;
if (scrollOptionsHorizontal.get("behavior", scrollBehaviorString)) {
if (!ScrollableArea::scrollBehaviorFromString(scrollBehaviorString, scrollBehavior)) {
exceptionState.throwTypeError("The ScrollBehavior provided is invalid.");
return;
}
}
int position;
if (!scrollOptionsHorizontal.get("x", position)) {
exceptionState.throwTypeError("ScrollOptionsHorizontal must include an 'x' member.");
return;
}
// FIXME: Use scrollBehavior to decide whether to scroll smoothly or instantly.
setScrollLeft(position);
}
void Element::setScrollTop(int newTop)
{
document().updateLayoutIgnorePendingStylesheets();
if (document().documentElement() != this) {
if (RenderBox* rend = renderBox())
rend->setScrollTop(static_cast<int>(newTop * rend->style()->effectiveZoom()));
return;
}
if (RuntimeEnabledFeatures::scrollTopLeftInteropEnabled()) {
if (document().inQuirksMode())
return;
Frame* frame = document().frame();
if (!frame)
return;
FrameView* view = frame->view();
if (!view)
return;
view->setScrollPosition(IntPoint(view->scrollX(), static_cast<int>(newTop * frame->pageZoomFactor())));
}
}
void Element::setScrollTop(const Dictionary& scrollOptionsVertical, ExceptionState& exceptionState)
{
String scrollBehaviorString;
ScrollBehavior scrollBehavior = ScrollBehaviorAuto;
if (scrollOptionsVertical.get("behavior", scrollBehaviorString)) {
if (!ScrollableArea::scrollBehaviorFromString(scrollBehaviorString, scrollBehavior)) {
exceptionState.throwTypeError("The ScrollBehavior provided is invalid.");
return;
}
}
int position;
if (!scrollOptionsVertical.get("y", position)) {
exceptionState.throwTypeError("ScrollOptionsVertical must include a 'y' member.");
return;
}
// FIXME: Use scrollBehavior to decide whether to scroll smoothly or instantly.
setScrollTop(position);
}
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());
ASSERT(renderer());
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()))
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, ExceptionState& exceptionState)
{
if (!Document::isValidName(localName)) {
exceptionState.throwDOMException(InvalidCharacterError, "'" + localName + "' is not a valid attribute name.");
return;
}
synchronizeAttribute(localName);
const AtomicString& caseAdjustedLocalName = shouldIgnoreAttributeCase() ? localName.lower() : localName;
size_t index = elementData() ? elementData()->getAttributeItemIndex(caseAdjustedLocalName, false) : kNotFound;
const QualifiedName& qName = index != kNotFound ? 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) : kNotFound;
setAttributeInternal(index, name, value, NotInSynchronizationOfLazyAttribute);
}
void Element::setSynchronizedLazyAttribute(const QualifiedName& name, const AtomicString& value)
{
size_t index = elementData() ? elementData()->getAttributeItemIndex(name) : kNotFound;
setAttributeInternal(index, name, value, InSynchronizationOfLazyAttribute);
}
ALWAYS_INLINE void Element::setAttributeInternal(size_t index, const QualifiedName& name, const AtomicString& newValue, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
{
if (newValue.isNull()) {
if (index != kNotFound)
removeAttributeInternal(index, inSynchronizationOfLazyAttribute);
return;
}
if (index == kNotFound) {
addAttributeInternal(name, newValue, inSynchronizationOfLazyAttribute);
return;
}
const Attribute* existingAttribute = attributeItem(index);
QualifiedName existingAttributeName = existingAttribute->name();
if (!inSynchronizationOfLazyAttribute)
willModifyAttribute(existingAttributeName, existingAttribute->value(), newValue);
if (newValue != existingAttribute->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(existingAttributeName))
attrNode->setValue(newValue);
else
ensureUniqueElementData()->attributeItem(index)->setValue(newValue);
}
if (!inSynchronizationOfLazyAttribute)
didModifyAttribute(existingAttributeName, 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, const RuleFeatureSet& features)
{
ASSERT(newId != oldId);
if (!oldId.isEmpty() && features.hasSelectorForId(oldId))
return true;
if (!newId.isEmpty() && features.hasSelectorForId(newId))
return true;
return false;
}
void Element::attributeChanged(const QualifiedName& name, const AtomicString& newValue, AttributeModificationReason reason)
{
if (ElementShadow* parentElementShadow = shadowWhereNodeCanBeDistributed(*this)) {
if (shouldInvalidateDistributionWhenAttributeChanged(parentElementShadow, name, newValue))
parentElementShadow->setNeedsDistributionRecalc();
}
parseAttribute(name, newValue);
document().incDOMTreeVersion();
StyleResolver* styleResolver = document().styleResolver();
bool testShouldInvalidateStyle = inActiveDocument() && styleResolver && styleChangeType() < SubtreeStyleChange;
bool shouldInvalidateStyle = false;
if (isStyledElement() && name == styleAttr) {
styleAttributeChanged(newValue, reason);
} else if (isStyledElement() && isPresentationAttribute(name)) {
elementData()->m_presentationAttributeStyleIsDirty = true;
setNeedsStyleRecalc(LocalStyleChange);
}
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->ensureRuleFeatureSet());
}
} else if (name == classAttr) {
classAttributeChanged(newValue);
} else if (name == HTMLNames::nameAttr) {
setHasName(!newValue.isNull());
}
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(SubtreeStyleChange);
if (AXObjectCache* cache = document().existingAXObjectCache())
cache->handleAttributeChanged(name, this);
}
inline void Element::attributeChangedFromParserOrByCloning(const QualifiedName& name, const AtomicString& newValue, AttributeModificationReason reason)
{
if (name == isAttr)
CustomElementRegistrationContext::setTypeExtension(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<CharacterType>(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);
}
void Element::classAttributeChanged(const AtomicString& newClassString)
{
StyleResolver* styleResolver = document().styleResolver();
bool testShouldInvalidateStyle = inActiveDocument() && styleResolver && styleChangeType() < SubtreeStyleChange;
if (classStringHasClassName(newClassString)) {
const bool shouldFoldCase = document().inQuirksMode();
const SpaceSplitString oldClasses = elementData()->classNames();
elementData()->setClass(newClassString, shouldFoldCase);
const SpaceSplitString& newClasses = elementData()->classNames();
if (testShouldInvalidateStyle)
styleResolver->ensureRuleFeatureSet().scheduleStyleInvalidationForClassChange(oldClasses, newClasses, this);
} else {
const SpaceSplitString& oldClasses = elementData()->classNames();
if (testShouldInvalidateStyle)
styleResolver->ensureRuleFeatureSet().scheduleStyleInvalidationForClassChange(oldClasses, this);
elementData()->clearClass();
}
if (hasRareData())
elementRareData()->clearClassListValueForQuirksMode();
}
bool Element::shouldInvalidateDistributionWhenAttributeChanged(ElementShadow* elementShadow, const QualifiedName& name, const AtomicString& newValue)
{
ASSERT(elementShadow);
const SelectRuleFeatureSet& featureSet = elementShadow->ensureSelectFeatureSet();
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 (featureSet.checkSelectorsForClassChange(oldClasses, newClasses))
return true;
} else {
const SpaceSplitString& oldClasses = elementData()->classNames();
if (featureSet.checkSelectorsForClassChange(oldClasses))
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().elementDataCache())
m_elementData = document().elementDataCache()->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();
}
void Element::setPrefix(const AtomicString& prefix, ExceptionState& exceptionState)
{
UseCounter::count(document(), UseCounter::ElementSetPrefix);
if (!prefix.isEmpty() && !Document::isValidName(prefix)) {
exceptionState.throwDOMException(InvalidCharacterError, "The prefix '" + prefix + "' is not a valid name.");
return;
}
// FIXME: Raise NamespaceError if prefix is malformed per the Namespaces in XML specification.
const AtomicString& nodeNamespaceURI = namespaceURI();
if (nodeNamespaceURI.isEmpty() && !prefix.isEmpty()) {
exceptionState.throwDOMException(NamespaceError, "No namespace is set, so a namespace prefix may not be set.");
return;
}
if (prefix == xmlAtom && nodeNamespaceURI != XMLNames::xmlNamespaceURI) {
exceptionState.throwDOMException(NamespaceError, "The prefix '" + xmlAtom + "' may not be set on namespace '" + nodeNamespaceURI + "'.");
return;
}
if (exceptionState.hadException())
return;
m_tagName.setPrefix(prefix.isEmpty() ? AtomicString() : prefix);
}
const AtomicString& Element::locateNamespacePrefix(const AtomicString& namespaceToLocate) const
{
if (!prefix().isNull() && namespaceURI() == namespaceToLocate)
return prefix();
if (hasAttributes()) {
for (unsigned i = 0; i < attributeCount(); i++) {
const Attribute* attr = attributeItem(i);
if (attr->prefix() == xmlnsAtom && attr->value() == namespaceToLocate)
return attr->localName();
}
}
if (Element* parent = parentElement())
return parent->locateNamespacePrefix(namespaceToLocate);
return nullAtom;
}
KURL Element::baseURI() const
{
const AtomicString& baseAttribute = fastGetAttribute(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 RenderStyle& style)
{
return style.display() != NONE;
}
RenderObject* Element::createRenderer(RenderStyle* style)
{
return RenderObject::createObject(this, style);
}
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);
ASSERT(!hasRareData() || !elementRareData()->hasPseudoElements());
if (!insertionPoint->isInTreeScope())
return InsertionDone;
if (hasRareData())
elementRareData()->clearClassListValueForQuirksMode();
if (isUpgradedCustomElement() && inDocument())
CustomElement::didEnterDocument(this, document());
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));
}
if (parentElement() && parentElement()->isInCanvasSubtree())
setIsInCanvasSubtree(true);
return InsertionDone;
}
void Element::removedFrom(ContainerNode* insertionPoint)
{
bool wasInDocument = insertionPoint->inDocument();
ASSERT(!hasRareData() || !elementRareData()->hasPseudoElements());
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) {
if (hasPendingResources())
document().accessSVGExtensions()->removeElementFromPendingResources(this);
if (isUpgradedCustomElement())
CustomElement::didLeaveDocument(this, insertionPoint->document());
}
document().removeFromTopLayer(this);
if (hasRareData())
elementRareData()->setIsInCanvasSubtree(false);
}
void Element::attach(const AttachContext& context)
{
ASSERT(document().inStyleRecalc());
StyleResolverParentPusher parentPusher(*this);
// We've already been through detach when doing an attach, but we might
// need to clear any state that's been added since then.
if (hasRareData() && styleChangeType() == NeedsReattachStyleChange) {
ElementRareData* data = elementRareData();
data->clearComputedStyle();
data->resetDynamicRestyleObservations();
// Only clear the style state if we're not going to reuse the style from recalcStyle.
if (!context.resolvedStyle)
data->resetStyleState();
}
RenderTreeBuilder(this, context.resolvedStyle).createRendererForElementIfNeeded();
addCallbackSelectors();
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);
createPseudoElementIfNeeded(BACKDROP);
if (hasRareData()) {
ElementRareData* data = elementRareData();
if (data->needsFocusAppearanceUpdateSoonAfterAttach()) {
if (isFocusable() && document().focusedElement() == this)
document().updateFocusAppearanceSoon(false /* don't restore selection */);
data->setNeedsFocusAppearanceUpdateSoonAfterAttach(false);
}
if (!renderer()) {
if (ActiveAnimations* activeAnimations = data->activeAnimations()) {
activeAnimations->cssAnimations().cancel();
activeAnimations->setAnimationStyleChange(false);
}
}
}
InspectorInstrumentation::didRecalculateStyleForElement(this);
}
void Element::unregisterNamedFlowContentNode()
{
if (RuntimeEnabledFeatures::cssRegionsEnabled() && inNamedFlow() && document().renderView())
document().renderView()->flowThreadController()->unregisterNamedFlowContentNode(this);
}
void Element::detach(const AttachContext& context)
{
RenderWidget::UpdateSuspendScope suspendWidgetHierarchyUpdates;
unregisterNamedFlowContentNode();
cancelFocusAppearanceUpdate();
removeCallbackSelectors();
if (hasRareData()) {
ElementRareData* data = elementRareData();
data->clearPseudoElements();
data->setIsInsideRegion(false);
// attach() will perform the below steps for us when inside recalcStyle.
if (!document().inStyleRecalc()) {
data->resetStyleState();
data->clearComputedStyle();
data->resetDynamicRestyleObservations();
}
if (ActiveAnimations* activeAnimations = data->activeAnimations()) {
if (context.performingReattach) {
// FIXME: We call detach from withing style recalc, so compositingState is not up to date.
DisableCompositingQueryAsserts disabler;
// FIXME: restart compositor animations rather than pull back to the main thread
activeAnimations->cancelAnimationOnCompositor();
} else {
activeAnimations->cssAnimations().cancel();
activeAnimations->setAnimationStyleChange(false);
}
}
if (ElementShadow* shadow = data->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()
{
ASSERT(document().inStyleRecalc());
RefPtr<RenderStyle> style;
// FIXME: Instead of clearing updates that may have been added from calls to styleForElement
// outside recalcStyle, we should just never set them if we're not inside recalcStyle.
if (ActiveAnimations* activeAnimations = this->activeAnimations())
activeAnimations->cssAnimations().setPendingUpdate(nullptr);
if (hasCustomStyleCallbacks())
style = customStyleForRenderer();
if (!style)
style = originalStyleForRenderer();
// styleForElement() might add active animations so we need to get it again.
if (ActiveAnimations* activeAnimations = this->activeAnimations())
activeAnimations->cssAnimations().maybeApplyPendingUpdate(this);
ASSERT(style);
return style.release();
}
PassRefPtr<RenderStyle> Element::originalStyleForRenderer()
{
ASSERT(document().inStyleRecalc());
return document().ensureStyleResolver().styleForElement(this);
}
void Element::recalcStyle(StyleRecalcChange change, Text* nextTextSibling)
{
ASSERT(document().inStyleRecalc());
ASSERT(!parentOrShadowHostNode()->needsStyleRecalc());
if (hasCustomStyleCallbacks())
willRecalcStyle(change);
if (change >= Inherit || needsStyleRecalc()) {
if (hasRareData()) {
ElementRareData* data = elementRareData();
data->resetStyleState();
data->clearComputedStyle();
if (change >= Inherit) {
if (ActiveAnimations* activeAnimations = data->activeAnimations())
activeAnimations->setAnimationStyleChange(false);
}
}
if (parentRenderStyle())
change = recalcOwnStyle(change);
clearNeedsStyleRecalc();
}
// If we reattached we don't need to recalc the style of our descendants anymore.
if ((change >= UpdatePseudoElements && change < Reattach) || childNeedsStyleRecalc()) {
recalcChildStyle(change);
clearChildNeedsStyleRecalc();
}
if (hasCustomStyleCallbacks())
didRecalcStyle(change);
if (change == Reattach)
reattachWhitespaceSiblings(nextTextSibling);
}
StyleRecalcChange Element::recalcOwnStyle(StyleRecalcChange change)
{
ASSERT(document().inStyleRecalc());
ASSERT(!parentOrShadowHostNode()->needsStyleRecalc());
ASSERT(change >= Inherit || needsStyleRecalc());
ASSERT(parentRenderStyle());
RefPtr<RenderStyle> oldStyle = renderStyle();
RefPtr<RenderStyle> newStyle = styleForRenderer();
StyleRecalcChange localChange = RenderStyle::compare(oldStyle.get(), newStyle.get());
ASSERT(newStyle);
if (localChange == Reattach) {
AttachContext reattachContext;
reattachContext.resolvedStyle = newStyle.get();
reattach(reattachContext);
return Reattach;
}
ASSERT(oldStyle);
InspectorInstrumentation::didRecalculateStyleForElement(this);
if (localChange != NoChange)
updateCallbackSelectors(oldStyle.get(), newStyle.get());
if (RenderObject* renderer = this->renderer()) {
if (localChange != NoChange || pseudoStyleCacheIsInvalid(oldStyle.get(), newStyle.get()) || shouldNotifyRendererWithIdenticalStyles()) {
renderer->setStyle(newStyle.get());
} else {
// 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.
// FIXME: We may be able to remove this hack, see discussion in
// https://codereview.chromium.org/30453002/
renderer->setStyleInternal(newStyle.get());
}
}
if (styleChangeType() >= SubtreeStyleChange)
return Force;
if (change > Inherit || localChange > Inherit)
return max(localChange, change);
if (localChange < Inherit && (oldStyle->hasPseudoElementStyle() || newStyle->hasPseudoElementStyle()))
return UpdatePseudoElements;
return localChange;
}
void Element::recalcChildStyle(StyleRecalcChange change)
{
ASSERT(document().inStyleRecalc());
ASSERT(change >= UpdatePseudoElements || childNeedsStyleRecalc());
ASSERT(!needsStyleRecalc());
StyleResolverParentPusher parentPusher(*this);
if (change > UpdatePseudoElements || childNeedsStyleRecalc()) {
for (ShadowRoot* root = youngestShadowRoot(); root; root = root->olderShadowRoot()) {
if (root->shouldCallRecalcStyle(change)) {
parentPusher.push();
root->recalcStyle(change);
}
}
}
updatePseudoElement(BEFORE, change);
if (change < Force && hasRareData() && childNeedsStyleRecalc())
checkForChildrenAdjacentRuleChanges();
if (change > UpdatePseudoElements || childNeedsStyleRecalc()) {
// This loop is deliberately backwards because we use insertBefore in the rendering tree, and want to avoid
// a potentially n^2 loop to find the insertion point while resolving style. Having us start from the last
// child and work our way back means in the common case, we'll find the insertion point in O(1) time.
// See crbug.com/288225
StyleResolver& styleResolver = document().ensureStyleResolver();
Text* lastTextNode = 0;
for (Node* child = lastChild(); child; child = child->previousSibling()) {
if (child->isTextNode()) {
toText(child)->recalcTextStyle(change, lastTextNode);
lastTextNode = toText(child);
} else if (child->isElementNode()) {
Element* element = toElement(child);
if (element->shouldCallRecalcStyle(change)) {
parentPusher.push();
element->recalcStyle(change, lastTextNode);
} else if (element->supportsStyleSharing()) {
styleResolver.addToStyleSharingList(*element);
}
if (element->renderer())
lastTextNode = 0;
}
}
}
updatePseudoElement(AFTER, change);
updatePseudoElement(BACKDROP, change);
}
void Element::checkForChildrenAdjacentRuleChanges()
{
bool hasDirectAdjacentRules = childrenAffectedByDirectAdjacentRules();
bool hasIndirectAdjacentRules = childrenAffectedByForwardPositionalRules();
if (!hasDirectAdjacentRules && !hasIndirectAdjacentRules)
return;
unsigned forceCheckOfNextElementCount = 0;
bool forceCheckOfAnyElementSibling = false;
for (Node* child = firstChild(); child; child = child->nextSibling()) {
if (!child->isElementNode())
continue;
Element* element = toElement(child);
bool childRulesChanged = element->needsStyleRecalc() && element->styleChangeType() >= SubtreeStyleChange;
if (forceCheckOfNextElementCount || forceCheckOfAnyElementSibling)
element->setNeedsStyleRecalc(SubtreeStyleChange);
if (forceCheckOfNextElementCount)
forceCheckOfNextElementCount--;
if (childRulesChanged && hasDirectAdjacentRules)
forceCheckOfNextElementCount = document().styleEngine()->maxDirectAdjacentSelectors();
forceCheckOfAnyElementSibling = forceCheckOfAnyElementSibling || (childRulesChanged && hasIndirectAdjacentRules);
}
}
void Element::updateCallbackSelectors(RenderStyle* oldStyle, RenderStyle* newStyle)
{
Vector<String> emptyVector;
const Vector<String>& oldCallbackSelectors = oldStyle ? oldStyle->callbackSelectors() : emptyVector;
const Vector<String>& newCallbackSelectors = newStyle ? newStyle->callbackSelectors() : emptyVector;
if (oldCallbackSelectors.isEmpty() && newCallbackSelectors.isEmpty())
return;
if (oldCallbackSelectors != newCallbackSelectors)
CSSSelectorWatch::from(document()).updateSelectorMatches(oldCallbackSelectors, newCallbackSelectors);
}
void Element::addCallbackSelectors()
{
updateCallbackSelectors(0, renderStyle());
}
void Element::removeCallbackSelectors()
{
updateCallbackSelectors(renderStyle(), 0);
}
ElementShadow* Element::shadow() const
{
return hasRareData() ? elementRareData()->shadow() : 0;
}
ElementShadow& Element::ensureShadow()
{
return ensureElementRareData().ensureShadow();
}
void Element::didAffectSelector(AffectedSelectorMask mask)
{
setNeedsStyleRecalc(SubtreeStyleChange);
if (ElementShadow* elementShadow = shadowWhereNodeCanBeDistributed(*this))
elementShadow->didAffectSelector(mask);
}
void Element::setAnimationStyleChange(bool animationStyleChange)
{
if (ActiveAnimations* activeAnimations = elementRareData()->activeAnimations())
activeAnimations->setAnimationStyleChange(animationStyleChange);
}
void Element::setNeedsAnimationStyleRecalc()
{
bool recalcPending = styleChangeType() != NoStyleChange;
setNeedsStyleRecalc(LocalStyleChange, StyleChangeFromRenderer);
if (!recalcPending)
setAnimationStyleChange(true);
}
PassRefPtr<ShadowRoot> Element::createShadowRoot(ExceptionState& exceptionState)
{
if (alwaysCreateUserAgentShadowRoot())
ensureUserAgentShadowRoot();
// Some elements make assumptions about what kind of renderers they allow
// as children so we can't allow author shadows on them for now. An override
// flag is provided for testing how author shadows interact on these elements.
if (!areAuthorShadowsAllowed() && !RuntimeEnabledFeatures::authorShadowDOMForAnyElementEnabled()) {
exceptionState.throwDOMException(HierarchyRequestError, "Author-created shadow roots are disabled for this element.");
return 0;
}
return PassRefPtr<ShadowRoot>(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;
}
void Element::didAddShadowRoot(ShadowRoot&)
{
}
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;
}
bool Element::childTypeAllowed(NodeType type) const
{
switch (type) {
case ELEMENT_NODE:
case TEXT_NODE:
case COMMENT_NODE:
case PROCESSING_INSTRUCTION_NODE:
case CDATA_SECTION_NODE:
return true;
default:
break;
}
return false;
}
void Element::checkForEmptyStyleChange(RenderStyle* style)
{
if (!style && !styleAffectedByEmpty())
return;
if (!style || (styleAffectedByEmpty() && (!style->emptyState() || hasChildNodes())))
setNeedsStyleRecalc(SubtreeStyleChange);
}
void Element::checkForSiblingStyleChanges(bool finishedParsingCallback, Node* beforeChange, Node* afterChange, int childCountDelta)
{
if (!inActiveDocument() || document().hasPendingForcedStyleRecalc() || styleChangeType() >= SubtreeStyleChange)
return;
RenderStyle* style = renderStyle();
// :empty selector.
checkForEmptyStyleChange(style);
if (!style || (needsStyleRecalc() && childrenAffectedByPositionalRules()))
return;
// 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 ((childrenAffectedByForwardPositionalRules() && afterChange) || (childrenAffectedByBackwardPositionalRules() && beforeChange)) {
setNeedsStyleRecalc(SubtreeStyleChange);
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 (childrenAffectedByFirstChildRules() && afterChange) {
// Find our new first child.
Node* newFirstChild = firstElementChild();
RenderStyle* newFirstChildStyle = newFirstChild ? newFirstChild->renderStyle() : 0;
// Find the first element node following |afterChange|
Node* firstElementAfterInsertion = afterChange->isElementNode() ? afterChange : afterChange->nextElementSibling();
RenderStyle* firstElementAfterInsertionStyle = firstElementAfterInsertion ? firstElementAfterInsertion->renderStyle() : 0;
// This is the insert/append case.
if (newFirstChild != firstElementAfterInsertion && firstElementAfterInsertionStyle && firstElementAfterInsertionStyle->firstChildState())
firstElementAfterInsertion->setNeedsStyleRecalc(SubtreeStyleChange);
// We also have to handle node removal.
if (childCountDelta < 0 && newFirstChild == firstElementAfterInsertion && newFirstChild && (!newFirstChildStyle || !newFirstChildStyle->firstChildState()))
newFirstChild->setNeedsStyleRecalc(SubtreeStyleChange);
}
// :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 (childrenAffectedByLastChildRules() && beforeChange) {
// Find our new last child.
Node* newLastChild = lastElementChild();
RenderStyle* newLastChildStyle = newLastChild ? newLastChild->renderStyle() : 0;
// Find the last element node going backwards from |beforeChange|
Node* lastElementBeforeInsertion = beforeChange->isElementNode() ? beforeChange : beforeChange->previousElementSibling();
RenderStyle* lastElementBeforeInsertionStyle = lastElementBeforeInsertion ? lastElementBeforeInsertion->renderStyle() : 0;
if (newLastChild != lastElementBeforeInsertion && lastElementBeforeInsertionStyle && lastElementBeforeInsertionStyle->lastChildState())
lastElementBeforeInsertion->setNeedsStyleRecalc(SubtreeStyleChange);
// 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 && (!newLastChildStyle || !newLastChildStyle->lastChildState()))
newLastChild->setNeedsStyleRecalc(SubtreeStyleChange);
}
// 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 (childrenAffectedByDirectAdjacentRules() && afterChange) {
if (Node* firstElementAfterInsertion = afterChange->isElementNode() ? afterChange : afterChange->nextElementSibling())
firstElementAfterInsertion->setNeedsStyleRecalc(SubtreeStyleChange);
}
}
void Element::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
{
ContainerNode::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
if (changedByParser)
checkForEmptyStyleChange(renderStyle());
else
checkForSiblingStyleChanges(false, beforeChange, afterChange, childCountDelta);
if (ElementShadow* shadow = this->shadow())
shadow->setNeedsDistributionRecalc();
}
void Element::removeAllEventListeners()
{
ContainerNode::removeAllEventListeners();
if (ElementShadow* shadow = this->shadow())
shadow->removeAllEventListeners();
}
void Element::finishParsingChildren()
{
setIsFinishedParsingChildren(true);
checkForSiblingStyleChanges(this, lastChild(), 0, 0);
}
#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, ExceptionState& exceptionState)
{
if (!attrNode) {
exceptionState.throwDOMException(TypeMismatchError, "The node provided is invalid.");
return 0;
}
RefPtr<Attr> oldAttrNode = attrIfExists(attrNode->qualifiedName());
if (oldAttrNode.get() == attrNode)
return attrNode; // This Attr is already attached to the element.
// InUseAttributeError: Raised if node is an Attr that is already an attribute of another Element object.
// The DOM user must explicitly clone Attr nodes to re-use them in other elements.
if (attrNode->ownerElement()) {
exceptionState.throwDOMException(InUseAttributeError, "The node provided is an attribute node that is already an attribute of another Element; attribute nodes must be explicitly cloned.");
return 0;
}
synchronizeAllAttributes();
UniqueElementData* elementData = ensureUniqueElementData();
size_t index = elementData->getAttributeItemIndex(attrNode->qualifiedName(), shouldIgnoreAttributeCase());
if (index != kNotFound) {
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);
treeScope().adoptIfNeeded(*attrNode);
ensureAttrNodeListForElement(this).append(attrNode);
return oldAttrNode.release();
}
PassRefPtr<Attr> Element::removeAttributeNode(Attr* attr, ExceptionState& exceptionState)
{
if (!attr) {
exceptionState.throwDOMException(TypeMismatchError, "The node provided is invalid.");
return 0;
}
if (attr->ownerElement() != this) {
exceptionState.throwDOMException(NotFoundError, "The node provided is owned by another element.");
return 0;
}
ASSERT(document() == attr->document());
synchronizeAttribute(attr->qualifiedName());
size_t index = elementData()->getAttrIndex(attr);
if (index == kNotFound) {
exceptionState.throwDOMException(NotFoundError, "The attribute was not found on this element.");
return 0;
}
RefPtr<Attr> guard(attr);
detachAttrNodeAtIndex(attr, index);
return guard.release();
}
bool Element::parseAttributeName(QualifiedName& out, const AtomicString& namespaceURI, const AtomicString& qualifiedName, ExceptionState& exceptionState)
{
AtomicString prefix, localName;
if (!Document::parseQualifiedName(qualifiedName, prefix, localName, exceptionState))
return false;
ASSERT(!exceptionState.hadException());
QualifiedName qName(prefix, localName, namespaceURI);
if (!Document::hasValidNamespaceForAttributes(qName)) {
exceptionState.throwDOMException(NamespaceError, "'" + namespaceURI + "' is an invalid namespace for attributes.");
return false;
}
out = qName;
return true;
}
void Element::setAttributeNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, const AtomicString& value, ExceptionState& exceptionState)
{
QualifiedName parsedName = anyName;
if (!parseAttributeName(parsedName, namespaceURI, qualifiedName, exceptionState))
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() ? name.lower() : name;
size_t index = elementData()->getAttributeItemIndex(localName, false);
if (index == kNotFound) {
if (UNLIKELY(localName == styleAttr) && elementData()->m_styleAttributeIsDirty && isStyledElement())
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());
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() ? 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);
}
void Element::focus(bool restorePreviousSelection, FocusDirection direction)
{
if (!inDocument())
return;
Document& doc = document();
if (doc.focusedElement() == 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().setFocusedElement(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);
frame->selection().setSelection(newSelection);
frame->selection().revealSelection();
} else if (renderer() && !renderer()->isWidget())
renderer()->scrollRectToVisible(boundingBox());
}
void Element::blur()
{
cancelFocusAppearanceUpdate();
if (treeScope().adjustedFocusedElement() == this) {
Document& doc = document();
if (doc.page())
doc.page()->focusController().setFocusedElement(0, doc.frame());
else
doc.setFocusedElement(0);
}
}
bool Element::isFocusable() const
{
return inDocument() && supportsFocus() && !isInert() && rendererIsFocusable();
}
bool Element::isKeyboardFocusable() const
{
return isFocusable() && tabIndex() >= 0;
}
bool Element::isMouseFocusable() const
{
return isFocusable();
}
void Element::dispatchFocusEvent(Element* oldFocusedElement, FocusDirection)
{
RefPtr<FocusEvent> event = FocusEvent::create(EventTypeNames::focus, false, false, document().domWindow(), 0, oldFocusedElement);
EventDispatcher::dispatchEvent(this, FocusEventDispatchMediator::create(event.release()));
}
void Element::dispatchBlurEvent(Element* newFocusedElement)
{
RefPtr<FocusEvent> event = FocusEvent::create(EventTypeNames::blur, false, false, document().domWindow(), 0, newFocusedElement);
EventDispatcher::dispatchEvent(this, BlurEventDispatchMediator::create(event.release()));
}
void Element::dispatchFocusInEvent(const AtomicString& eventType, Element* oldFocusedElement)
{
ASSERT(!NoEventDispatchAssertion::isEventDispatchForbidden());
ASSERT(eventType == EventTypeNames::focusin || eventType == EventTypeNames::DOMFocusIn);
dispatchScopedEventDispatchMediator(FocusInEventDispatchMediator::create(FocusEvent::create(eventType, true, false, document().domWindow(), 0, oldFocusedElement)));
}
void Element::dispatchFocusOutEvent(const AtomicString& eventType, Element* newFocusedElement)
{
ASSERT(!NoEventDispatchAssertion::isEventDispatchForbidden());
ASSERT(eventType == EventTypeNames::focusout || eventType == EventTypeNames::DOMFocusOut);
dispatchScopedEventDispatchMediator(FocusOutEventDispatchMediator::create(FocusEvent::create(eventType, true, false, document().domWindow(), 0, newFocusedElement)));
}
String Element::innerHTML() const
{
return createMarkup(this, ChildrenOnly);
}
String Element::outerHTML() const
{
return createMarkup(this);
}
void Element::setInnerHTML(const String& html, ExceptionState& exceptionState)
{
if (RefPtr<DocumentFragment> fragment = createFragmentForInnerOuterHTML(html, this, AllowScriptingContent, "innerHTML", exceptionState)) {
ContainerNode* container = this;
if (hasTagName(templateTag))
container = toHTMLTemplateElement(this)->content();
replaceChildrenWithFragment(container, fragment.release(), exceptionState);
}
}
void Element::setOuterHTML(const String& html, ExceptionState& exceptionState)
{
Node* p = parentNode();
if (!p) {
exceptionState.throwDOMException(NoModificationAllowedError, "This element has no parent node.");
return;
}
if (!p->isElementNode()) {
exceptionState.throwDOMException(NoModificationAllowedError, "This element's parent is of type '" + p->nodeName() + "', which is not an element node.");
return;
}
RefPtr<Element> parent = toElement(p);
RefPtr<Node> prev = previousSibling();
RefPtr<Node> next = nextSibling();
RefPtr<DocumentFragment> fragment = createFragmentForInnerOuterHTML(html, parent.get(), AllowScriptingContent, "outerHTML", exceptionState);
if (exceptionState.hadException())
return;
parent->replaceChild(fragment.release(), this, exceptionState);
RefPtr<Node> node = next ? next->previousSibling() : 0;
if (!exceptionState.hadException() && node && node->isTextNode())
mergeWithNextTextNode(node.release(), exceptionState);
if (!exceptionState.hadException() && prev && prev->isTextNode())
mergeWithNextTextNode(prev.release(), exceptionState);
}
Node* Element::insertAdjacent(const String& where, Node* newChild, ExceptionState& exceptionState)
{
if (equalIgnoringCase(where, "beforeBegin")) {
if (ContainerNode* parent = this->parentNode()) {
parent->insertBefore(newChild, this, exceptionState);
if (!exceptionState.hadException())
return newChild;
}
return 0;
}
if (equalIgnoringCase(where, "afterBegin")) {
insertBefore(newChild, firstChild(), exceptionState);
return exceptionState.hadException() ? 0 : newChild;
}
if (equalIgnoringCase(where, "beforeEnd")) {
appendChild(newChild, exceptionState);
return exceptionState.hadException() ? 0 : newChild;
}
if (equalIgnoringCase(where, "afterEnd")) {
if (ContainerNode* parent = this->parentNode()) {
parent->insertBefore(newChild, nextSibling(), exceptionState);
if (!exceptionState.hadException())
return newChild;
}
return 0;
}
exceptionState.throwDOMException(SyntaxError, "The value provided ('" + where + "') is not one of 'beforeBegin', 'afterBegin', 'beforeEnd', or 'afterEnd'.");
return 0;
}
// Step 1 of http://domparsing.spec.whatwg.org/#insertadjacenthtml()
static Element* contextElementForInsertion(const String& where, Element* element, ExceptionState& exceptionState)
{
if (equalIgnoringCase(where, "beforeBegin") || equalIgnoringCase(where, "afterEnd")) {
ContainerNode* parent = element->parentNode();
if (!parent || !parent->isElementNode()) {
exceptionState.throwDOMException(NoModificationAllowedError, "The element has no parent.");
return 0;
}
return toElement(parent);
}
if (equalIgnoringCase(where, "afterBegin") || equalIgnoringCase(where, "beforeEnd"))
return element;
exceptionState.throwDOMException(SyntaxError, "The value provided ('" + where + "') is not one of 'beforeBegin', 'afterBegin', 'beforeEnd', or 'afterEnd'.");
return 0;
}
Element* Element::insertAdjacentElement(const String& where, Element* newChild, ExceptionState& exceptionState)
{
if (!newChild) {
// IE throws COM Exception E_INVALIDARG; this is the best DOM exception alternative.
exceptionState.throwTypeError("The node provided is null.");
return 0;
}
Node* returnValue = insertAdjacent(where, newChild, exceptionState);
return toElement(returnValue);
}
void Element::insertAdjacentText(const String& where, const String& text, ExceptionState& exceptionState)
{
RefPtr<Text> textNode = document().createTextNode(text);
insertAdjacent(where, textNode.get(), exceptionState);
}
void Element::insertAdjacentHTML(const String& where, const String& markup, ExceptionState& exceptionState)
{
RefPtr<Element> contextElement = contextElementForInsertion(where, this, exceptionState);
if (!contextElement)
return;
RefPtr<DocumentFragment> fragment = createFragmentForInnerOuterHTML(markup, contextElement.get(), AllowScriptingContent, "insertAdjacentHTML", exceptionState);
if (!fragment)
return;
insertAdjacent(where, fragment.get(), exceptionState);
}
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::textFromChildren()
{
Text* firstTextNode = 0;
bool foundMultipleTextNodes = false;
unsigned totalLength = 0;
for (Node* child = firstChild(); child; child = child->nextSibling()) {
if (!child->isTextNode())
continue;
Text* text = toText(child);
if (!firstTextNode)
firstTextNode = text;
else
foundMultipleTextNodes = true;
unsigned length = text->data().length();
if (length > std::numeric_limits<unsigned>::max() - totalLength)
return emptyString();
totalLength += length;
}
if (!firstTextNode)
return emptyString();
if (firstTextNode && !foundMultipleTextNodes) {
firstTextNode->atomize();
return firstTextNode->data();
}
StringBuilder content;
content.reserveCapacity(totalLength);
for (Node* child = firstTextNode; child; child = child->nextSibling()) {
if (!child->isTextNode())
continue;
content.append(toText(child)->data());
}
ASSERT(content.length() == totalLength);
return content.toString();
}
const AtomicString& Element::shadowPseudoId() const
{
if (ShadowRoot* root = containingShadowRoot()) {
if (root->type() == ShadowRoot::UserAgentShadowRoot)
return fastGetAttribute(pseudoAttr);
}
return nullAtom;
}
void Element::setShadowPseudoId(const AtomicString& id)
{
ASSERT(CSSSelector::parsePseudoType(id) == CSSSelector::PseudoWebKitCustomElement || CSSSelector::parsePseudoType(id) == CSSSelector::PseudoUserAgentCustomElement);
setAttribute(pseudoAttr, id);
}
bool Element::isInDescendantTreeOf(const Element* shadowHost) const
{
ASSERT(shadowHost);
ASSERT(isShadowHost(shadowHost));
const ShadowRoot* shadowRoot = containingShadowRoot();
while (shadowRoot) {
const Element* ancestorShadowHost = shadowRoot->shadowHost();
if (ancestorShadowHost == shadowHost)
return true;
shadowRoot = ancestorShadowHost->containingShadowRoot();
}
return false;
}
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 (!inActiveDocument())
// 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& rareData = ensureElementRareData();
if (!rareData.computedStyle())
rareData.setComputedStyle(document().styleForElementIgnoringPendingStylesheets(this));
return pseudoElementSpecifier ? rareData.computedStyle()->getCachedPseudoStyle(pseudoElementSpecifier) : rareData.computedStyle();
}
void Element::setStyleAffectedByEmpty()
{
ensureElementRareData().setStyleAffectedByEmpty(true);
}
void Element::setChildrenAffectedByFocus()
{
ensureElementRareData().setChildrenAffectedByFocus(true);
}
void Element::setChildrenAffectedByHover()
{
ensureElementRareData().setChildrenAffectedByHover(true);
}
void Element::setChildrenAffectedByActive()
{
ensureElementRareData().setChildrenAffectedByActive(true);
}
void Element::setChildrenAffectedByDrag()
{
ensureElementRareData().setChildrenAffectedByDrag(true);
}
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::childrenSupportStyleSharing() const
{
if (!hasRareData())
return true;
return !rareDataChildrenAffectedByFocus()
&& !rareDataChildrenAffectedByHover()
&& !rareDataChildrenAffectedByActive()
&& !rareDataChildrenAffectedByDrag()
&& !rareDataChildrenAffectedByFirstChildRules()
&& !rareDataChildrenAffectedByLastChildRules()
&& !rareDataChildrenAffectedByDirectAdjacentRules()
&& !rareDataChildrenAffectedByForwardPositionalRules()
&& !rareDataChildrenAffectedByBackwardPositionalRules();
}
bool Element::rareDataStyleAffectedByEmpty() const
{
ASSERT(hasRareData());
return elementRareData()->styleAffectedByEmpty();
}
bool Element::rareDataChildrenAffectedByFocus() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByFocus();
}
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();
}
void Element::setIsInsideRegion(bool value)
{
if (value == isInsideRegion())
return;
ensureElementRareData().setIsInsideRegion(value);
}
bool Element::isInsideRegion() const
{
return hasRareData() ? elementRareData()->isInsideRegion() : false;
}
void Element::setRegionOversetState(RegionOversetState state)
{
ensureElementRareData().setRegionOversetState(state);
}
RegionOversetState Element::regionOversetState() const
{
return hasRareData() ? elementRareData()->regionOversetState() : RegionUndefined;
}
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().focusedElement() == 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, StyleRecalcChange change)
{
ASSERT(!needsStyleRecalc());
PseudoElement* element = pseudoElement(pseudoId);
if (element && (change == UpdatePseudoElements || element->shouldCallRecalcStyle(change))) {
// Need to clear the cached style if the PseudoElement wants a recalc so it
// computes a new style.
if (element->needsStyleRecalc())
renderer()->style()->removeCachedPseudoStyle(pseudoId);
// PseudoElement styles hang off their parent element's style so if we needed
// a style recalc we should Force one on the pseudo.
// FIXME: We should figure out the right text sibling to pass.
element->recalcStyle(change == UpdatePseudoElements ? 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 >= UpdatePseudoElements) {
createPseudoElementIfNeeded(pseudoId);
}
}
void Element::createPseudoElementIfNeeded(PseudoId pseudoId)
{
if (isPseudoElement())
return;
RefPtr<PseudoElement> element = document().ensureStyleResolver().createPseudoElementIfNeeded(*this, pseudoId);
if (!element)
return;
if (pseudoId == BACKDROP)
document().addToTopLayer(element.get(), this);
element->insertedInto(this);
element->attach();
InspectorInstrumentation::pseudoElementCreated(element.get());
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::matches(const String& selectors, ExceptionState& exceptionState)
{
SelectorQuery* selectorQuery = document().selectorQueryCache().add(AtomicString(selectors), document(), exceptionState);
if (!selectorQuery)
return false;
return selectorQuery->matches(*this);
}
DOMTokenList* Element::classList()
{
ElementRareData& rareData = ensureElementRareData();
if (!rareData.classList())
rareData.setClassList(ClassList::create(this));
return rareData.classList();
}
DOMStringMap* Element::dataset()
{
ElementRareData& rareData = ensureElementRareData();
if (!rareData.dataset())
rareData.setDataset(DatasetDOMStringMap::create(this));
return rareData.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)
{
setAttribute(attributeName, AtomicString::number(value));
}
unsigned Element::getUnsignedIntegralAttribute(const QualifiedName& attributeName) const
{
return getAttribute(attributeName).string().toUInt();
}
void Element::setUnsignedIntegralAttribute(const QualifiedName& attributeName, unsigned value)
{
// Range restrictions are enforced for unsigned IDL attributes that
// reflect content attributes,
// http://www.whatwg.org/specs/web-apps/current-work/multipage/common-dom-interfaces.html#reflecting-content-attributes-in-idl-attributes
if (value > 0x7fffffffu)
value = 0;
setAttribute(attributeName, AtomicString::number(value));
}
double Element::getFloatingPointAttribute(const QualifiedName& attributeName, double fallbackValue) const
{
return parseToDoubleForNumberType(getAttribute(attributeName), fallbackValue);
}
void Element::setFloatingPointAttribute(const QualifiedName& attributeName, double value)
{
setAttribute(attributeName, AtomicString::number(value));
}
void Element::webkitRequestFullscreen()
{
FullscreenElementStack::from(&document())->requestFullScreenForElement(this, ALLOW_KEYBOARD_INPUT, FullscreenElementStack::EnforceIFrameAllowFullScreenRequirement);
}
void Element::webkitRequestFullScreen(unsigned short flags)
{
FullscreenElementStack::from(&document())->requestFullScreenForElement(this, (flags | LEGACY_MOZILLA_REQUEST), FullscreenElementStack::EnforceIFrameAllowFullScreenRequirement);
}
bool Element::containsFullScreenElement() const
{
return hasRareData() && elementRareData()->containsFullScreenElement();
}
void Element::setContainsFullScreenElement(bool flag)
{
ensureElementRareData().setContainsFullScreenElement(flag);
setNeedsStyleRecalc(SubtreeStyleChange);
}
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 = fastGetAttribute(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()->isRenderNamedFlowFragmentContainer())
return toRenderBlockFlow(renderer())->renderNamedFlowFragment();
return 0;
}
const AtomicString& Element::webkitRegionOverset() const
{
DEFINE_STATIC_LOCAL(AtomicString, undefinedState, ("undefined", AtomicString::ConstructFromLiteral));
if (!RuntimeEnabledFeatures::cssRegionsEnabled())
return undefinedState;
document().updateLayoutIgnorePendingStylesheets();
if (!renderRegion())
return undefinedState;
switch (renderRegion()->regionOversetState()) {
case RegionFit: {
DEFINE_STATIC_LOCAL(AtomicString, fitState, ("fit", AtomicString::ConstructFromLiteral));
return fitState;
}
case RegionEmpty: {
DEFINE_STATIC_LOCAL(AtomicString, emptyState, ("empty", AtomicString::ConstructFromLiteral));
return emptyState;
}
case RegionOverset: {
DEFINE_STATIC_LOCAL(AtomicString, overflowState, ("overset", AtomicString::ConstructFromLiteral));
return overflowState;
}
case RegionUndefined:
return undefinedState;
}
ASSERT_NOT_REACHED();
return undefinedState;
}
Vector<RefPtr<Range> > Element::webkitGetRegionFlowRanges() const
{
Vector<RefPtr<Range> > rangeObjects;
if (!RuntimeEnabledFeatures::cssRegionsEnabled())
return rangeObjects;
document().updateLayoutIgnorePendingStylesheets();
if (renderer() && renderer()->isRenderNamedFlowFragmentContainer()) {
RenderNamedFlowFragment* region = toRenderBlockFlow(renderer())->renderNamedFlowFragment();
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 !toSVGElement(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, toHTMLLabelElement(this));
if (!newForAttributeValue.isEmpty())
scope.addLabel(newForAttributeValue, toHTMLLabelElement(this));
}
static bool hasSelectorForAttribute(Document* document, const AtomicString& localName)
{
return document->ensureStyleResolver().ensureRuleFeatureSet().hasSelectorForAttribute(localName);
}
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 (inActiveDocument() && hasSelectorForAttribute(&document(), name.localName()))
setNeedsStyleRecalc(SubtreeStyleChange);
if (isUpgradedCustomElement())
CustomElement::attributeDidChange(this, name.localName(), oldValue, newValue);
}
if (OwnPtr<MutationObserverInterestGroup> recipients = MutationObserverInterestGroup::createForAttributesMutation(*this, name))
recipients->enqueueMutationRecord(MutationRecord::createAttributes(this, name, oldValue));
InspectorInstrumentation::willModifyDOMAttr(this, oldValue, newValue);
}
void Element::didAddAttribute(const QualifiedName& name, const AtomicString& value)
{
attributeChanged(name, value);
InspectorInstrumentation::didModifyDOMAttr(this, name.localName(), value);
dispatchSubtreeModifiedEvent();
}
void Element::didModifyAttribute(const QualifiedName& name, const AtomicString& value)
{
attributeChanged(name, value);
InspectorInstrumentation::didModifyDOMAttr(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(this, name.localName());
dispatchSubtreeModifiedEvent();
}
void Element::didMoveToNewDocument(Document& oldDocument)
{
Node::didMoveToNewDocument(oldDocument);
// If the documents differ by quirks mode then they differ by case sensitivity
// for class and id names so we need to go through the attribute change logic
// to pick up the new casing in the ElementData.
if (oldDocument.inQuirksMode() != document().inQuirksMode()) {
if (hasID())
setIdAttribute(getIdAttribute());
if (hasClass())
setAttribute(HTMLNames::classAttr, getClassAttribute());
}
}
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;
if (type == TableRows) {
ASSERT(hasTagName(tableTag));
return ensureRareData().ensureNodeLists().addCache<HTMLTableRowsCollection>(this, type);
} else if (type == SelectOptions) {
ASSERT(hasTagName(selectTag));
return ensureRareData().ensureNodeLists().addCache<HTMLOptionsCollection>(this, type);
} else if (type == FormControls) {
ASSERT(hasTagName(formTag) || hasTagName(fieldsetTag));
return ensureRareData().ensureNodeLists().addCache<HTMLFormControlsCollection>(this, type);
}
return ensureRareData().ensureNodeLists().addCache<HTMLCollection>(this, type);
}
static void scheduleLayerUpdateCallback(Node* node)
{
// Notify the renderer even is the styles are identical since it may need to
// create or destroy a RenderLayer.
node->setNeedsStyleRecalc(LocalStyleChange, StyleChangeFromRenderer);
}
void Element::scheduleLayerUpdate()
{
if (document().inStyleRecalc())
PostAttachCallbacks::queueCallback(scheduleLayerUpdateCallback, this);
else
scheduleLayerUpdateCallback(this);
}
HTMLCollection* Element::cachedHTMLCollection(CollectionType type)
{
return hasRareData() && rareData()->nodeLists() ? rareData()->nodeLists()->cached<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);
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(StyleRecalcChange)
{
ASSERT(hasCustomStyleCallbacks());
}
void Element::didRecalcStyle(StyleRecalcChange)
{
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);
// Quirks mode makes class and id not case sensitive. We can't share the ElementData
// if the idForStyleResolution and the className need different casing.
bool ownerDocumentsHaveDifferentCaseSensitivity = false;
if (other.hasClass() || other.hasID())
ownerDocumentsHaveDifferentCaseSensitivity = other.document().inQuirksMode() != document().inQuirksMode();
// 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 are no presentation attributes and sharing the data won't result in different case sensitivity of class or id.
if (other.m_elementData->isUnique()
&& !ownerDocumentsHaveDifferentCaseSensitivity
&& !other.m_elementData->presentationAttributeStyle())
const_cast<Element&>(other).m_elementData = static_cast<const UniqueElementData*>(other.m_elementData.get())->makeShareableCopy();
if (!other.m_elementData->isUnique() && !ownerDocumentsHaveDifferentCaseSensitivity)
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();
}
}
InputMethodContext* Element::inputMethodContext()
{
return ensureElementRareData().ensureInputMethodContext(toHTMLElement(this));
}
bool Element::hasInputMethodContext() const
{
return hasRareData() && elementRareData()->hasInputMethodContext();
}
bool Element::hasPendingResources() const
{
return hasRareData() && elementRareData()->hasPendingResources();
}
void Element::setHasPendingResources()
{
ensureElementRareData().setHasPendingResources(true);
}
void Element::clearHasPendingResources()
{
ensureElementRareData().setHasPendingResources(false);
}
void Element::synchronizeStyleAttributeInternal() const
{
ASSERT(isStyledElement());
ASSERT(elementData());
ASSERT(elementData()->m_styleAttributeIsDirty);
elementData()->m_styleAttributeIsDirty = false;
const StylePropertySet* inlineStyle = this->inlineStyle();
const_cast<Element*>(this)->setSynchronizedLazyAttribute(styleAttr,
inlineStyle ? AtomicString(inlineStyle->asText()) : nullAtom);
}
CSSStyleDeclaration* Element::style()
{
if (!isStyledElement())
return 0;
return ensureElementRareData().ensureInlineCSSStyleDeclaration(this);
}
MutableStylePropertySet* Element::ensureMutableInlineStyle()
{
ASSERT(isStyledElement());
RefPtr<StylePropertySet>& inlineStyle = ensureUniqueElementData()->m_inlineStyle;
if (!inlineStyle) {
CSSParserMode mode = (!isHTMLElement() || document().inQuirksMode()) ? HTMLQuirksMode : HTMLStandardMode;
inlineStyle = MutableStylePropertySet::create(mode);
} else if (!inlineStyle->isMutable()) {
inlineStyle = inlineStyle->mutableCopy();
}
return toMutableStylePropertySet(inlineStyle);
}
void Element::clearMutableInlineStyleIfEmpty()
{
if (ensureMutableInlineStyle()->isEmpty()) {
ensureUniqueElementData()->m_inlineStyle.clear();
}
}
inline void Element::setInlineStyleFromString(const AtomicString& newStyleString)
{
ASSERT(isStyledElement());
RefPtr<StylePropertySet>& inlineStyle = elementData()->m_inlineStyle;
// Avoid redundant work if we're using shared attribute data with already parsed inline style.
if (inlineStyle && !elementData()->isUnique())
return;
// We reconstruct the property set instead of mutating if there is no CSSOM wrapper.
// This makes wrapperless property sets immutable and so cacheable.
if (inlineStyle && !inlineStyle->isMutable())
inlineStyle.clear();
if (!inlineStyle) {
inlineStyle = BisonCSSParser::parseInlineStyleDeclaration(newStyleString, this);
} else {
ASSERT(inlineStyle->isMutable());
static_pointer_cast<MutableStylePropertySet>(inlineStyle)->parseDeclaration(newStyleString, document().elementSheet()->contents());
}
}
void Element::styleAttributeChanged(const AtomicString& newStyleString, AttributeModificationReason modificationReason)
{
ASSERT(isStyledElement());
WTF::OrdinalNumber startLineNumber = WTF::OrdinalNumber::beforeFirst();
if (document().scriptableDocumentParser() && !document().isInDocumentWrite())
startLineNumber = document().scriptableDocumentParser()->lineNumber();
if (newStyleString.isNull()) {
ensureUniqueElementData()->m_inlineStyle.clear();
} else if (modificationReason == ModifiedByCloning || document().contentSecurityPolicy()->allowInlineStyle(document().url(), startLineNumber)) {
setInlineStyleFromString(newStyleString);
}
elementData()->m_styleAttributeIsDirty = false;
setNeedsStyleRecalc(LocalStyleChange);
InspectorInstrumentation::didInvalidateStyleAttr(this);
}
void Element::inlineStyleChanged()
{
ASSERT(isStyledElement());
setNeedsStyleRecalc(LocalStyleChange);
ASSERT(elementData());
elementData()->m_styleAttributeIsDirty = true;
InspectorInstrumentation::didInvalidateStyleAttr(this);
}
bool Element::setInlineStyleProperty(CSSPropertyID propertyID, CSSValueID identifier, bool important)
{
ASSERT(isStyledElement());
ensureMutableInlineStyle()->setProperty(propertyID, cssValuePool().createIdentifierValue(identifier), important);
inlineStyleChanged();
return true;
}
bool Element::setInlineStyleProperty(CSSPropertyID propertyID, CSSPropertyID identifier, bool important)
{
ASSERT(isStyledElement());
ensureMutableInlineStyle()->setProperty(propertyID, cssValuePool().createIdentifierValue(identifier), important);
inlineStyleChanged();
return true;
}
bool Element::setInlineStyleProperty(CSSPropertyID propertyID, double value, CSSPrimitiveValue::UnitTypes unit, bool important)
{
ASSERT(isStyledElement());
ensureMutableInlineStyle()->setProperty(propertyID, cssValuePool().createValue(value, unit), important);
inlineStyleChanged();
return true;
}
bool Element::setInlineStyleProperty(CSSPropertyID propertyID, const String& value, bool important)
{
ASSERT(isStyledElement());
bool changes = ensureMutableInlineStyle()->setProperty(propertyID, value, important, document().elementSheet()->contents());
if (changes)
inlineStyleChanged();
return changes;
}
bool Element::removeInlineStyleProperty(CSSPropertyID propertyID)
{
ASSERT(isStyledElement());
if (!inlineStyle())
return false;
bool changes = ensureMutableInlineStyle()->removeProperty(propertyID);
if (changes)
inlineStyleChanged();
return changes;
}
void Element::removeAllInlineStyleProperties()
{
ASSERT(isStyledElement());
if (!inlineStyle())
return;
ensureMutableInlineStyle()->clear();
inlineStyleChanged();
}
void Element::updatePresentationAttributeStyle()
{
// ShareableElementData doesn't store presentation attribute style, so make sure we have a UniqueElementData.
UniqueElementData* elementData = ensureUniqueElementData();
elementData->m_presentationAttributeStyleIsDirty = false;
elementData->m_presentationAttributeStyle = computePresentationAttributeStyle(*this);
}
void Element::addPropertyToPresentationAttributeStyle(MutableStylePropertySet* style, CSSPropertyID propertyID, CSSValueID identifier)
{
ASSERT(isStyledElement());
style->setProperty(propertyID, cssValuePool().createIdentifierValue(identifier));
}
void Element::addPropertyToPresentationAttributeStyle(MutableStylePropertySet* style, CSSPropertyID propertyID, double value, CSSPrimitiveValue::UnitTypes unit)
{
ASSERT(isStyledElement());
style->setProperty(propertyID, cssValuePool().createValue(value, unit));
}
void Element::addPropertyToPresentationAttributeStyle(MutableStylePropertySet* style, CSSPropertyID propertyID, const String& value)
{
ASSERT(isStyledElement());
style->setProperty(propertyID, value, false);
}
bool Element::supportsStyleSharing() const
{
if (!isStyledElement() || !parentOrShadowHostElement())
return false;
// If the element has inline style it is probably unique.
if (inlineStyle())
return false;
if (isSVGElement() && toSVGElement(this)->animatedSMILStyleProperties())
return false;
// Ids stop style sharing if they show up in the stylesheets.
if (hasID() && document().ensureStyleResolver().hasRulesForId(idForStyleResolution()))
return false;
// Active and hovered elements always make a chain towards the document node
// and no siblings or cousins will have the same state.
if (hovered())
return false;
if (active())
return false;
if (focused())
return false;
if (!parentOrShadowHostElement()->childrenSupportStyleSharing())
return false;
if (hasScopedHTMLStyleChild())
return false;
if (this == document().cssTarget())
return false;
if (isHTMLElement() && toHTMLElement(this)->hasDirectionAuto())
return false;
if (hasActiveAnimations())
return false;
// Turn off style sharing for elements that can gain layers for reasons outside of the style system.
// See comments in RenderObject::setStyle().
// FIXME: Why does gaining a layer from outside the style system require disabling sharing?
if (hasTagName(iframeTag)
|| hasTagName(frameTag)
|| hasTagName(embedTag)
|| hasTagName(objectTag)
|| hasTagName(appletTag)
|| hasTagName(canvasTag))
return false;
// FIXME: We should share style for option and optgroup whenever possible.
// Before doing so, we need to resolve issues in HTMLSelectElement::recalcListItems
// and RenderMenuList::setText. See also https://bugs.webkit.org/show_bug.cgi?id=88405
if (hasTagName(optionTag) || hasTagName(optgroupTag))
return false;
if (FullscreenElementStack::isActiveFullScreenElement(this))
return false;
return true;
}
} // namespace WebCore