blob: 41c734aa68083ac7e8da55ccc916ff6d1dcdfd13 [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 "CSSPropertyNames.h"
#include "CSSValueKeywords.h"
#include "HTMLNames.h"
#include "RuntimeEnabledFeatures.h"
#include "SVGNames.h"
#include "XMLNames.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/CSSParser.h"
#include "core/css/CSSStyleSheet.h"
#include "core/css/CSSValuePool.h"
#include "core/css/PropertySetCSSStyleDeclaration.h"
#include "core/css/StylePropertySet.h"
#include "core/css/resolver/StyleResolver.h"
#include "core/dom/Attr.h"
#include "core/dom/Attribute.h"
#include "core/dom/CSSSelectorWatch.h"
#include "core/dom/ClientRect.h"
#include "core/dom/ClientRectList.h"
#include "core/dom/DatasetDOMStringMap.h"
#include "core/dom/Document.h"
#include "core/dom/DocumentSharedObjectPool.h"
#include "core/dom/ElementRareData.h"
#include "core/dom/ExceptionCode.h"
#include "core/dom/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/NodeRenderingContext.h"
#include "core/dom/PostAttachCallbacks.h"
#include "core/dom/PresentationAttributeStyle.h"
#include "core/dom/PseudoElement.h"
#include "core/dom/ScriptableDocumentParser.h"
#include "core/dom/SelectorQuery.h"
#include "core/dom/Text.h"
#include "core/dom/WhitespaceChildList.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/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/html/ClassList.h"
#include "core/html/HTMLCollection.h"
#include "core/html/HTMLDocument.h"
#include "core/html/HTMLElement.h"
#include "core/html/HTMLFormControlsCollection.h"
#include "core/html/HTMLFrameOwnerElement.h"
#include "core/html/HTMLLabelElement.h"
#include "core/html/HTMLOptionsCollection.h"
#include "core/html/HTMLTableRowsCollection.h"
#include "core/html/parser/HTMLParserIdioms.h"
#include "core/page/FocusController.h"
#include "core/page/Page.h"
#include "core/page/PointerLockController.h"
#include "core/rendering/FlowThreadController.h"
#include "core/rendering/RenderRegion.h"
#include "core/rendering/RenderView.h"
#include "core/rendering/RenderWidget.h"
#include "core/svg/SVGDocumentExtensions.h"
#include "core/svg/SVGElement.h"
#include "wtf/BitVector.h"
#include "wtf/HashFunctions.h"
#include "wtf/text/CString.h"
#include "wtf/text/TextPosition.h"
namespace WebCore {
using namespace HTMLNames;
using namespace XMLNames;
class StyleResolverParentPusher {
public:
StyleResolverParentPusher(Element* parent)
: m_parent(parent)
, m_pushedStyleResolver(0)
{
}
void push()
{
if (m_pushedStyleResolver)
return;
m_pushedStyleResolver = m_parent->document().styleResolver();
m_pushedStyleResolver->pushParentElement(m_parent);
}
~StyleResolverParentPusher()
{
if (!m_pushedStyleResolver)
return;
// This tells us that our pushed style selector is in a bad state,
// so we should just bail out in that scenario.
ASSERT(m_pushedStyleResolver == m_parent->document().styleResolver());
if (m_pushedStyleResolver != m_parent->document().styleResolver())
return;
m_pushedStyleResolver->popParentElement(m_parent);
}
private:
Element* m_parent;
StyleResolver* m_pushedStyleResolver;
};
typedef Vector<RefPtr<Attr> > AttrNodeList;
typedef HashMap<Element*, OwnPtr<AttrNodeList> > AttrNodeListMap;
static AttrNodeListMap& attrNodeListMap()
{
DEFINE_STATIC_LOCAL(AttrNodeListMap, map, ());
return map;
}
static AttrNodeList* attrNodeListForElement(Element* element)
{
if (!element->hasSyntheticAttrChildNodes())
return 0;
ASSERT(attrNodeListMap().contains(element));
return attrNodeListMap().get(element);
}
static AttrNodeList& ensureAttrNodeListForElement(Element* element)
{
if (element->hasSyntheticAttrChildNodes()) {
ASSERT(attrNodeListMap().contains(element));
return *attrNodeListMap().get(element);
}
ASSERT(!attrNodeListMap().contains(element));
element->setHasSyntheticAttrChildNodes(true);
AttrNodeListMap::AddResult result = attrNodeListMap().add(element, adoptPtr(new AttrNodeList));
return *result.iterator->value;
}
static void removeAttrNodeListForElement(Element* element)
{
ASSERT(element->hasSyntheticAttrChildNodes());
ASSERT(attrNodeListMap().contains(element));
attrNodeListMap().remove(element);
element->setHasSyntheticAttrChildNodes(false);
}
static Attr* findAttrNodeInList(AttrNodeList& attrNodeList, const QualifiedName& name)
{
for (unsigned i = 0; i < attrNodeList.size(); ++i) {
if (attrNodeList[i]->qualifiedName() == name)
return attrNodeList[i].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());
if (PropertySetCSSStyleDeclaration* cssomWrapper = inlineStyleCSSOMWrapper())
cssomWrapper->clearParentElement();
if (hasRareData()) {
ElementRareData* data = elementRareData();
data->setPseudoElement(BEFORE, 0);
data->setPseudoElement(AFTER, 0);
data->setPseudoElement(BACKDROP, 0);
data->clearShadow();
if (RuntimeEnabledFeatures::webAnimationsCSSEnabled()) {
if (ActiveAnimations* activeAnimations = data->activeAnimations())
activeAnimations->cssAnimations().cancel();
}
}
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()) {
ASSERT(!renderer()->needsLayout());
} else {
// We can't just use needsStyleRecalc() because if the node is in a
// display:none tree it might say it needs style recalc but the whole
// document is actually up to date.
ASSERT(!document().childNeedsStyleRecalc());
}
// FIXME: Even if we are not visible, we might have a child that is visible.
// Hyatt wants to fix that some day with a "has visible content" flag or the like.
if (!renderer() || renderer()->style()->visibility() != VISIBLE)
return false;
return true;
}
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 (hasActiveAnimations())
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 (!RuntimeEnabledFeatures::webAnimationsEnabled())
return false;
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;
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());
toSVGElement(this)->synchronizeAnimatedSVGAttribute(name);
}
}
inline void Element::synchronizeAttribute(const AtomicString& localName) const
{
// This version of synchronizeAttribute() is streamlined for the case where you don't have a full QualifiedName,
// e.g when called from DOM API.
if (!elementData())
return;
if (elementData()->m_styleAttributeIsDirty && equalPossiblyIgnoringCase(localName, styleAttr.localName(), shouldIgnoreAttributeCase())) {
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.
ASSERT(isSVGElement());
static_cast<const SVGElement*>(this)->synchronizeAnimatedSVGAttribute(QualifiedName(nullAtom, localName, nullAtom));
}
}
const AtomicString& Element::getAttribute(const QualifiedName& name) const
{
if (!elementData())
return nullAtom;
synchronizeAttribute(name);
if (const Attribute* attribute = getAttributeItem(name))
return attribute->value();
return nullAtom;
}
void Element::scrollIntoView(bool alignToTop)
{
document().updateLayoutIgnorePendingStylesheets();
if (!renderer())
return;
LayoutRect bounds = boundingBox();
// Align to the top / bottom and to the closest edge.
if (alignToTop)
renderer()->scrollRectToVisible(bounds, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignTopAlways);
else
renderer()->scrollRectToVisible(bounds, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignBottomAlways);
}
void Element::scrollIntoViewIfNeeded(bool centerIfNeeded)
{
document().updateLayoutIgnorePendingStylesheets();
if (!renderer())
return;
LayoutRect bounds = boundingBox();
if (centerIfNeeded)
renderer()->scrollRectToVisible(bounds, ScrollAlignment::alignCenterIfNeeded, ScrollAlignment::alignCenterIfNeeded);
else
renderer()->scrollRectToVisible(bounds, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignToEdgeIfNeeded);
}
void Element::scrollByUnits(int units, ScrollGranularity granularity)
{
document().updateLayoutIgnorePendingStylesheets();
if (!renderer())
return;
if (!renderer()->hasOverflowClip())
return;
ScrollDirection direction = ScrollDown;
if (units < 0) {
direction = ScrollUp;
units = -units;
}
Node* stopNode = this;
toRenderBox(renderer())->scroll(direction, granularity, units, &stopNode);
}
void Element::scrollByLines(int lines)
{
scrollByUnits(lines, ScrollByLine);
}
void Element::scrollByPages(int pages)
{
scrollByUnits(pages, ScrollByPage);
}
static float localZoomForRenderer(RenderObject* renderer)
{
// FIXME: This does the wrong thing if two opposing zooms are in effect and canceled each
// other out, but the alternative is that we'd have to crawl up the whole render tree every
// time (or store an additional bit in the RenderStyle to indicate that a zoom was specified).
float zoomFactor = 1;
if (renderer->style()->effectiveZoom() != 1) {
// Need to find the nearest enclosing RenderObject that set up
// a differing zoom, and then we divide our result by it to eliminate the zoom.
RenderObject* prev = renderer;
for (RenderObject* curr = prev->parent(); curr; curr = curr->parent()) {
if (curr->style()->effectiveZoom() != prev->style()->effectiveZoom()) {
zoomFactor = prev->style()->zoom();
break;
}
prev = curr;
}
if (prev->isRenderView())
zoomFactor = prev->style()->zoom();
}
return zoomFactor;
}
static int adjustForLocalZoom(LayoutUnit value, RenderObject* renderer)
{
float zoomFactor = localZoomForRenderer(renderer);
if (zoomFactor == 1)
return value;
return lroundf(value / zoomFactor);
}
int Element::offsetLeft()
{
document().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::bindingsOffsetParent()
{
Element* element = offsetParent();
if (!element || !element->isInShadowTree())
return element;
return element->containingShadowRoot()->shouldExposeToBindings() ? element : 0;
}
Element* Element::offsetParent()
{
document().updateLayoutIgnorePendingStylesheets();
if (RenderObject* renderer = this->renderer())
return renderer->offsetParent();
return 0;
}
int Element::clientLeft()
{
document().updateLayoutIgnorePendingStylesheets();
if (RenderBox* renderer = renderBox())
return adjustForAbsoluteZoom(roundToInt(renderer->clientLeft()), renderer);
return 0;
}
int Element::clientTop()
{
document().updateLayoutIgnorePendingStylesheets();
if (RenderBox* renderer = renderBox())
return adjustForAbsoluteZoom(roundToInt(renderer->clientTop()), renderer);
return 0;
}
int Element::clientWidth()
{
document().updateLayoutIgnorePendingStylesheets();
// When in strict mode, clientWidth for the document element should return the width of the containing frame.
// When in quirks mode, clientWidth for the body element should return the width of the containing frame.
bool inQuirksMode = document().inQuirksMode();
if ((!inQuirksMode && document().documentElement() == this)
|| (inQuirksMode && isHTMLElement() && document().body() == this)) {
if (FrameView* view = document().view()) {
if (RenderView* renderView = document().renderView())
return adjustForAbsoluteZoom(view->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 (document().inQuirksMode())
return 0;
if (FrameView* view = document().view()) {
if (RenderView* renderView = document().renderView())
return adjustForAbsoluteZoom(view->scrollX(), renderView);
}
}
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollLeft(), rend);
return 0;
}
int Element::scrollTop()
{
document().updateLayoutIgnorePendingStylesheets();
if (document().documentElement() == this) {
if (document().inQuirksMode())
return 0;
if (FrameView* view = document().view()) {
if (RenderView* renderView = document().renderView())
return adjustForAbsoluteZoom(view->scrollY(), renderView);
}
}
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollTop(), rend);
return 0;
}
void Element::setScrollLeft(int newLeft)
{
document().updateLayoutIgnorePendingStylesheets();
if (document().documentElement() == this) {
if (document().inQuirksMode())
return;
Frame* frame = document().frame();
if (!frame)
return;
FrameView* view = frame->view();
if (!view)
return;
// WHATWG spec says [1]: "If the element is the root element invoke scroll()
// with x as first argument and zero as second". Blink intentionally matches
// other engine's behaviors here, instead, where the 'y' scroll position is
// preversed. See [2].
// [1] http://dev.w3.org/csswg/cssom-view/#dom-element-scrollleft
// [2] https://www.w3.org/Bugs/Public/show_bug.cgi?id=23448
view->setScrollPosition(IntPoint(static_cast<int>(newLeft * frame->pageZoomFactor()), view->scrollY()));
}
if (RenderBox* rend = renderBox())
rend->setScrollLeft(static_cast<int>(newLeft * rend->style()->effectiveZoom()));
}
void Element::setScrollTop(int newTop)
{
document().updateLayoutIgnorePendingStylesheets();
if (document().documentElement() == this) {
if (document().inQuirksMode())
return;
Frame* frame = document().frame();
if (!frame)
return;
FrameView* view = frame->view();
if (!view)
return;
// WHATWG spec says [1]: "If the element is the root element invoke scroll()
// with zero as first argument and y as second". Blink intentionally
// matches other engine's behaviors here, instead, where the 'x' scroll
// position is preversed. See [2].
// [1] http://dev.w3.org/csswg/cssom-view/#dom-element-scrolltop
// [2] https://www.w3.org/Bugs/Public/show_bug.cgi?id=23448
view->setScrollPosition(IntPoint(view->scrollX(), static_cast<int>(newTop * frame->pageZoomFactor())));
}
if (RenderBox* rend = renderBox())
rend->setScrollTop(static_cast<int>(newTop * rend->style()->effectiveZoom()));
}
int Element::scrollWidth()
{
document().updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollWidth(), rend);
return 0;
}
int Element::scrollHeight()
{
document().updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollHeight(), rend);
return 0;
}
IntRect Element::boundsInRootViewSpace()
{
document().updateLayoutIgnorePendingStylesheets();
FrameView* view = document().view();
if (!view)
return IntRect();
Vector<FloatQuad> quads;
if (isSVGElement() && renderer()) {
// Get the bounding rectangle from the SVG model.
SVGElement* svgElement = toSVGElement(this);
FloatRect localRect;
if (svgElement->getBoundingBox(localRect))
quads.append(renderer()->localToAbsoluteQuad(localRect));
} else {
// Get the bounding rectangle from the box model.
if (renderBoxModelObject())
renderBoxModelObject()->absoluteQuads(quads);
}
if (quads.isEmpty())
return IntRect();
IntRect result = quads[0].enclosingBoundingBox();
for (size_t i = 1; i < quads.size(); ++i)
result.unite(quads[i].enclosingBoundingBox());
result = view->contentsToRootView(result);
return result;
}
PassRefPtr<ClientRectList> Element::getClientRects()
{
document().updateLayoutIgnorePendingStylesheets();
RenderBoxModelObject* renderBoxModelObject = this->renderBoxModelObject();
if (!renderBoxModelObject)
return ClientRectList::create();
// FIXME: Handle SVG elements.
// FIXME: Handle table/inline-table with a caption.
Vector<FloatQuad> quads;
renderBoxModelObject->absoluteQuads(quads);
document().adjustFloatQuadsForScrollAndAbsoluteZoom(quads, renderBoxModelObject);
return ClientRectList::create(quads);
}
PassRefPtr<ClientRect> Element::getBoundingClientRect()
{
document().updateLayoutIgnorePendingStylesheets();
Vector<FloatQuad> quads;
if (isSVGElement() && renderer() && !renderer()->isSVGRoot()) {
// Get the bounding rectangle from the SVG model.
SVGElement* svgElement = toSVGElement(this);
FloatRect localRect;
if (svgElement->getBoundingBox(localRect))
quads.append(renderer()->localToAbsoluteQuad(localRect));
} else {
// Get the bounding rectangle from the box model.
if (renderBoxModelObject())
renderBoxModelObject()->absoluteQuads(quads);
}
if (quads.isEmpty())
return ClientRect::create();
FloatRect result = quads[0].boundingBox();
for (size_t i = 1; i < quads.size(); ++i)
result.unite(quads[i].boundingBox());
document().adjustFloatRectForScrollAndAbsoluteZoom(result, renderer());
return ClientRect::create(result);
}
IntRect Element::screenRect() const
{
if (!renderer())
return IntRect();
// FIXME: this should probably respect transforms
return document().view()->contentsToScreen(renderer()->absoluteBoundingBoxRectIgnoringTransforms());
}
const AtomicString& Element::getAttribute(const AtomicString& localName) const
{
if (!elementData())
return nullAtom;
synchronizeAttribute(localName);
if (const Attribute* attribute = elementData()->getAttributeItem(localName, shouldIgnoreAttributeCase()))
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& es)
{
if (!Document::isValidName(localName)) {
es.throwUninformativeAndGenericDOMException(InvalidCharacterError);
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);
}
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;
}
QualifiedName existingAttributeName = attributeItem(index)->name();
if (!inSynchronizationOfLazyAttribute)
willModifyAttribute(existingAttributeName, attributeItem(index)->value(), newValue);
if (newValue != attributeItem(index)->value()) {
// If there is an Attr node hooked to this attribute, the Attr::setValue() call below
// will write into the ElementData.
// FIXME: Refactor this so it makes some sense.
if (RefPtr<Attr> attrNode = inSynchronizationOfLazyAttribute ? 0 : attrIfExists(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 = shadowOfParentForDistribution(this)) {
if (shouldInvalidateDistributionWhenAttributeChanged(parentElementShadow, name, newValue))
parentElementShadow->setNeedsDistributionRecalc();
}
parseAttribute(name, newValue);
document().incDOMTreeVersion();
StyleResolver* styleResolver = document().styleResolverIfExists();
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->ruleFeatureSet());
}
} else if (name == classAttr) {
classAttributeChanged(newValue);
} else if (name == HTMLNames::nameAttr) {
setHasName(!newValue.isNull());
} else if (name == HTMLNames::pseudoAttr) {
shouldInvalidateStyle |= testShouldInvalidateStyle && isInShadowTree();
}
invalidateNodeListCachesInAncestors(&name, this);
// If there is currently no StyleResolver, we can't be sure that this attribute change won't affect style.
shouldInvalidateStyle |= !styleResolver;
if (shouldInvalidateStyle)
setNeedsStyleRecalc();
if (AXObjectCache* cache = document().existingAXObjectCache())
cache->handleAttributeChanged(name, this);
}
inline void Element::attributeChangedFromParserOrByCloning(const QualifiedName& name, const AtomicString& newValue, AttributeModificationReason reason)
{
if (name == isAttr)
CustomElementRegistrationContext::setTypeExtension(this, newValue, reason == ModifiedDirectly ? CustomElementRegistrationContext::CreatedByParser : CustomElementRegistrationContext::NotCreatedByParser);
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);
}
template<typename Checker>
static bool checkSelectorForClassChange(const SpaceSplitString& changedClasses, const Checker& checker)
{
unsigned changedSize = changedClasses.size();
for (unsigned i = 0; i < changedSize; ++i) {
if (checker.hasSelectorForClass(changedClasses[i]))
return true;
}
return false;
}
template<typename Checker>
static bool checkSelectorForClassChange(const SpaceSplitString& oldClasses, const SpaceSplitString& newClasses, const Checker& checker)
{
unsigned oldSize = oldClasses.size();
if (!oldSize)
return checkSelectorForClassChange(newClasses, checker);
BitVector remainingClassBits;
remainingClassBits.ensureSize(oldSize);
// Class vectors tend to be very short. This is faster than using a hash table.
unsigned newSize = newClasses.size();
for (unsigned i = 0; i < newSize; ++i) {
for (unsigned j = 0; j < oldSize; ++j) {
if (newClasses[i] == oldClasses[j]) {
remainingClassBits.quickSet(j);
continue;
}
}
if (checker.hasSelectorForClass(newClasses[i]))
return true;
}
for (unsigned i = 0; i < oldSize; ++i) {
// If the bit is not set the the corresponding class has been removed.
if (remainingClassBits.quickGet(i))
continue;
if (checker.hasSelectorForClass(oldClasses[i]))
return true;
}
return false;
}
void Element::classAttributeChanged(const AtomicString& newClassString)
{
StyleResolver* styleResolver = document().styleResolverIfExists();
bool testShouldInvalidateStyle = inActiveDocument() && styleResolver && styleChangeType() < SubtreeStyleChange;
bool shouldInvalidateStyle = false;
if (classStringHasClassName(newClassString)) {
const bool shouldFoldCase = document().inQuirksMode();
const SpaceSplitString oldClasses = elementData()->classNames();
elementData()->setClass(newClassString, shouldFoldCase);
const SpaceSplitString& newClasses = elementData()->classNames();
shouldInvalidateStyle = testShouldInvalidateStyle && checkSelectorForClassChange(oldClasses, newClasses, styleResolver->ruleFeatureSet());
} else {
const SpaceSplitString& oldClasses = elementData()->classNames();
shouldInvalidateStyle = testShouldInvalidateStyle && checkSelectorForClassChange(oldClasses, styleResolver->ruleFeatureSet());
elementData()->clearClass();
}
if (hasRareData())
elementRareData()->clearClassListValueForQuirksMode();
if (shouldInvalidateStyle)
setNeedsStyleRecalc();
}
bool Element::shouldInvalidateDistributionWhenAttributeChanged(ElementShadow* elementShadow, const QualifiedName& name, const AtomicString& newValue)
{
ASSERT(elementShadow);
const SelectRuleFeatureSet& featureSet = elementShadow->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 (checkSelectorForClassChange(oldClasses, newClasses, featureSet))
return true;
} else {
const SpaceSplitString& oldClasses = elementData()->classNames();
if (checkSelectorForClassChange(oldClasses, featureSet))
return true;
}
}
return featureSet.hasSelectorForAttribute(name.localName());
}
// Returns true is the given attribute is an event handler.
// We consider an event handler any attribute that begins with "on".
// It is a simple solution that has the advantage of not requiring any
// code or configuration change if a new event handler is defined.
static inline bool isEventHandlerAttribute(const Attribute& attribute)
{
return attribute.name().namespaceURI().isNull() && attribute.name().localName().startsWith("on");
}
bool Element::isJavaScriptURLAttribute(const Attribute& attribute) const
{
return isURLAttribute(attribute) && protocolIsJavaScript(stripLeadingAndTrailingHTMLSpaces(attribute.value()));
}
void Element::stripScriptingAttributes(Vector<Attribute>& attributeVector) const
{
size_t destination = 0;
for (size_t source = 0; source < attributeVector.size(); ++source) {
if (isEventHandlerAttribute(attributeVector[source])
|| isJavaScriptURLAttribute(attributeVector[source])
|| isHTMLContentAttribute(attributeVector[source]))
continue;
if (source != destination)
attributeVector[destination] = attributeVector[source];
++destination;
}
attributeVector.shrink(destination);
}
void Element::parserSetAttributes(const Vector<Attribute>& attributeVector)
{
ASSERT(!inDocument());
ASSERT(!parentNode());
ASSERT(!m_elementData);
if (attributeVector.isEmpty())
return;
if (document().sharedObjectPool())
m_elementData = document().sharedObjectPool()->cachedShareableElementDataWithAttributes(attributeVector);
else
m_elementData = ShareableElementData::createWithAttributes(attributeVector);
// Use attributeVector instead of m_elementData because attributeChanged might modify m_elementData.
for (unsigned i = 0; i < attributeVector.size(); ++i)
attributeChangedFromParserOrByCloning(attributeVector[i].name(), attributeVector[i].value(), ModifiedDirectly);
}
bool Element::hasAttributes() const
{
synchronizeAllAttributes();
return elementData() && elementData()->length();
}
bool Element::hasEquivalentAttributes(const Element* other) const
{
synchronizeAllAttributes();
other->synchronizeAllAttributes();
if (elementData() == other->elementData())
return true;
if (elementData())
return elementData()->isEquivalent(other->elementData());
if (other->elementData())
return other->elementData()->isEquivalent(elementData());
return true;
}
String Element::nodeName() const
{
return m_tagName.toString();
}
String Element::nodeNamePreservingCase() const
{
return m_tagName.toString();
}
void Element::setPrefix(const AtomicString& prefix, ExceptionState& es)
{
checkSetPrefix(prefix, es);
if (es.hadException())
return;
m_tagName.setPrefix(prefix.isEmpty() ? AtomicString() : prefix);
}
KURL Element::baseURI() const
{
const AtomicString& baseAttribute = getAttribute(baseAttr);
KURL base(KURL(), baseAttribute);
if (!base.protocol().isEmpty())
return base;
ContainerNode* parent = parentNode();
if (!parent)
return base;
const KURL& parentBase = parent->baseURI();
if (parentBase.isNull())
return base;
return KURL(parentBase, baseAttribute);
}
const AtomicString Element::imageSourceURL() const
{
return getAttribute(srcAttr);
}
bool Element::rendererIsNeeded(const 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);
if (Element* before = pseudoElement(BEFORE))
before->insertedInto(insertionPoint);
if (Element* after = pseudoElement(AFTER))
after->insertedInto(insertionPoint);
if (Element* backdrop = pseudoElement(BACKDROP))
backdrop->insertedInto(insertionPoint);
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();
if (Element* before = pseudoElement(BEFORE))
before->removedFrom(insertionPoint);
if (Element* after = pseudoElement(AFTER))
after->removedFrom(insertionPoint);
if (Element* backdrop = pseudoElement(BACKDROP))
backdrop->removedFrom(insertionPoint);
document().removeFromTopLayer(this);
if (containsFullScreenElement())
setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(false);
if (document().page())
document().page()->pointerLockController().elementRemoved(this);
setSavedLayerScrollOffset(IntSize());
if (insertionPoint->isInTreeScope() && treeScope() == document()) {
const AtomicString& idValue = getIdAttribute();
if (!idValue.isNull())
updateId(insertionPoint->treeScope(), idValue, nullAtom);
const AtomicString& nameValue = getNameAttribute();
if (!nameValue.isNull())
updateName(nameValue, nullAtom);
if (hasTagName(labelTag)) {
TreeScope& treeScope = insertionPoint->treeScope();
if (treeScope.shouldCacheLabelsByForAttribute())
updateLabel(treeScope, fastGetAttribute(forAttr), nullAtom);
}
}
ContainerNode::removedFrom(insertionPoint);
if (wasInDocument) {
if (hasPendingResources())
document().accessSVGExtensions()->removeElementFromPendingResources(this);
if (isUpgradedCustomElement())
CustomElement::didLeaveDocument(this, insertionPoint->document());
}
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 a lazyAttach, 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();
if (!context.resolvedStyle)
data->resetStyleState();
}
NodeRenderingContext(this, context.resolvedStyle).createRendererForElementIfNeeded();
if (RenderStyle* style = renderStyle())
updateCallbackSelectors(0, style);
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);
}
}
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();
if (RenderStyle* style = renderStyle()) {
if (!style->callbackSelectors().isEmpty())
updateCallbackSelectors(style, 0);
}
if (hasRareData()) {
ElementRareData* data = elementRareData();
data->setPseudoElement(BEFORE, 0);
data->setPseudoElement(AFTER, 0);
data->setPseudoElement(BACKDROP, 0);
data->clearComputedStyle();
data->resetDynamicRestyleObservations();
data->setIsInsideRegion(false);
// Only clear the style state if we're not going to reuse the style from recalcStyle.
if (!context.resolvedStyle)
data->resetStyleState();
if (RuntimeEnabledFeatures::webAnimationsCSSEnabled() && !context.performingReattach) {
if (ActiveAnimations* activeAnimations = data->activeAnimations())
activeAnimations->cssAnimations().cancel();
}
}
if (ElementShadow* shadow = this->shadow())
shadow->detach(context);
ContainerNode::detach(context);
}
bool Element::pseudoStyleCacheIsInvalid(const RenderStyle* currentStyle, RenderStyle* newStyle)
{
ASSERT(currentStyle == renderStyle());
ASSERT(renderer());
if (!currentStyle)
return false;
const PseudoStyleCache* pseudoStyleCache = currentStyle->cachedPseudoStyles();
if (!pseudoStyleCache)
return false;
size_t cacheSize = pseudoStyleCache->size();
for (size_t i = 0; i < cacheSize; ++i) {
RefPtr<RenderStyle> newPseudoStyle;
PseudoId pseudoId = pseudoStyleCache->at(i)->styleType();
if (pseudoId == FIRST_LINE || pseudoId == FIRST_LINE_INHERITED)
newPseudoStyle = renderer()->uncachedFirstLineStyle(newStyle);
else
newPseudoStyle = renderer()->getUncachedPseudoStyle(PseudoStyleRequest(pseudoId), newStyle, newStyle);
if (!newPseudoStyle)
return true;
if (*newPseudoStyle != *pseudoStyleCache->at(i)) {
if (pseudoId < FIRST_INTERNAL_PSEUDOID)
newStyle->setHasPseudoStyle(pseudoId);
newStyle->addCachedPseudoStyle(newPseudoStyle);
if (pseudoId == FIRST_LINE || pseudoId == FIRST_LINE_INHERITED) {
// FIXME: We should do an actual diff to determine whether a repaint vs. layout
// is needed, but for now just assume a layout will be required. The diff code
// in RenderObject::setStyle would need to be factored out so that it could be reused.
renderer()->setNeedsLayoutAndPrefWidthsRecalc();
}
return true;
}
}
return false;
}
PassRefPtr<RenderStyle> Element::styleForRenderer()
{
if (hasCustomStyleCallbacks()) {
if (RefPtr<RenderStyle> style = customStyleForRenderer())
return style.release();
}
return originalStyleForRenderer();
}
PassRefPtr<RenderStyle> Element::originalStyleForRenderer()
{
return document().styleResolver()->styleForElement(this);
}
bool Element::recalcStyle(StyleRecalcChange change)
{
ASSERT(document().inStyleRecalc());
if (hasCustomStyleCallbacks())
willRecalcStyle(change);
if (hasRareData() && (change > NoChange || needsStyleRecalc())) {
ElementRareData* data = elementRareData();
data->resetStyleState();
data->clearComputedStyle();
}
// Active InsertionPoints have no renderers so they never need to go through a recalc.
if ((change >= Inherit || needsStyleRecalc()) && parentRenderStyle() && !isActiveInsertionPoint(this))
change = recalcOwnStyle(change);
// If we reattached we don't need to recalc the style of our descendants anymore.
if (change < Reattach)
recalcChildStyle(change);
clearNeedsStyleRecalc();
clearChildNeedsStyleRecalc();
if (hasCustomStyleCallbacks())
didRecalcStyle(change);
return change == Reattach;
}
static bool callbackSelectorsDiffer(RenderStyle* style1, RenderStyle* style2)
{
const Vector<String> emptyVector;
const Vector<String>& callbackSelectors1 = style1 ? style1->callbackSelectors() : emptyVector;
const Vector<String>& callbackSelectors2 = style2 ? style2->callbackSelectors() : emptyVector;
if (callbackSelectors1.isEmpty() && callbackSelectors2.isEmpty()) {
// Help the inliner with this common case.
return false;
}
return callbackSelectors1 != callbackSelectors2;
}
StyleRecalcChange Element::recalcOwnStyle(StyleRecalcChange change)
{
ASSERT(document().inStyleRecalc());
CSSAnimationUpdateScope cssAnimationUpdateScope(this);
RefPtr<RenderStyle> oldStyle = renderStyle();
RefPtr<RenderStyle> newStyle = styleForRenderer();
StyleRecalcChange localChange = RenderStyle::compare(oldStyle.get(), newStyle.get());
if (localChange == Reattach) {
AttachContext reattachContext;
reattachContext.resolvedStyle = newStyle.get();
reattach(reattachContext);
return Reattach;
}
InspectorInstrumentation::didRecalculateStyleForElement(this);
if (localChange != NoChange && callbackSelectorsDiffer(oldStyle.get(), newStyle.get()))
updateCallbackSelectors(oldStyle.get(), newStyle.get());
if (RenderObject* renderer = this->renderer()) {
if (localChange != NoChange || pseudoStyleCacheIsInvalid(oldStyle.get(), newStyle.get()) || (change == Force && renderer->requiresForcedStyleRecalcPropagation()) || shouldNotifyRendererWithIdenticalStyles()) {
renderer->setAnimatableStyle(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 "rem" units are used anywhere in the document, and if the document element's font size changes, then go ahead and force font updating
// all the way down the tree. This is simpler than having to maintain a cache of objects (and such font size changes should be rare anyway).
if (document().styleEngine()->usesRemUnits() && document().documentElement() == this && oldStyle && newStyle && oldStyle->fontSize() != newStyle->fontSize()) {
// Cached RenderStyles may depend on the re units.
document().styleResolver()->invalidateMatchedPropertiesCache();
return Force;
}
if (styleChangeType() >= SubtreeStyleChange)
return Force;
return max(localChange, change);
}
void Element::recalcChildStyle(StyleRecalcChange change)
{
ASSERT(document().inStyleRecalc());
StyleResolverParentPusher parentPusher(this);
for (ShadowRoot* root = youngestShadowRoot(); root; root = root->olderShadowRoot()) {
if (shouldRecalcStyle(change, root)) {
parentPusher.push();
root->recalcStyle(change);
}
}
if (shouldRecalcStyle(change, this))
updatePseudoElement(BEFORE, change);
bool hasDirectAdjacentRules = childrenAffectedByDirectAdjacentRules();
bool hasIndirectAdjacentRules = childrenAffectedByForwardPositionalRules();
unsigned forceCheckOfNextElementCount = 0;
bool forceCheckOfAnyElementSibling = false;
if (hasDirectAdjacentRules || hasIndirectAdjacentRules) {
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();
if (forceCheckOfNextElementCount)
forceCheckOfNextElementCount--;
if (childRulesChanged && hasDirectAdjacentRules)
forceCheckOfNextElementCount = document().styleEngine()->maxDirectAdjacentSelectors();
forceCheckOfAnyElementSibling = forceCheckOfAnyElementSibling || (childRulesChanged && hasIndirectAdjacentRules);
}
}
// 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.
// Reversing this loop can lead to non-deterministic results in our code to optimize out empty whitespace
// RenderTexts. We try to put off recalcing their style until the end to avoid this issue.
// See crbug.com/288225
WhitespaceChildList whitespaceChildList(change);
for (Node* child = lastChild(); child; child = child->previousSibling()) {
if (child->isTextNode()) {
Text* textChild = toText(child);
// FIXME: This check is expensive and may negate the performance gained by the optimization of
// avoiding whitespace renderers.
if (textChild->containsOnlyWhitespace())
whitespaceChildList.append(textChild);
else
textChild->recalcTextStyle(change);
} else if (child->isElementNode()) {
Element* element = toElement(child);
if (shouldRecalcStyle(change, element)) {
parentPusher.push();
element->recalcStyle(change);
} else if (element->supportsStyleSharing()) {
document().styleResolver()->addToStyleSharingList(element);
}
}
}
whitespaceChildList.recalcStyle();
if (shouldRecalcStyle(change, this)) {
updatePseudoElement(AFTER, change);
updatePseudoElement(BACKDROP, change);
}
}
ElementShadow* Element::shadow() const
{
return hasRareData() ? elementRareData()->shadow() : 0;
}
ElementShadow& Element::ensureShadow()
{
return ensureElementRareData().ensureShadow();
}
void Element::didAffectSelector(AffectedSelectorMask mask)
{
setNeedsStyleRecalc();
if (ElementShadow* elementShadow = shadowOfParentForDistribution(this))
elementShadow->didAffectSelector(mask);
}
PassRefPtr<ShadowRoot> Element::createShadowRoot(ExceptionState& es)
{
if (alwaysCreateUserAgentShadowRoot())
ensureUserAgentShadowRoot();
if (RuntimeEnabledFeatures::authorShadowDOMForAnyElementEnabled())
return ensureShadow().addShadowRoot(*this, ShadowRoot::AuthorShadowRoot);
// Since some elements recreates shadow root dynamically, multiple shadow
// subtrees won't work well in that element. Until they are fixed, we disable
// adding author shadow root for them.
if (!areAuthorShadowsAllowed()) {
es.throwUninformativeAndGenericDOMException(HierarchyRequestError);
return 0;
}
return ensureShadow().addShadowRoot(*this, ShadowRoot::AuthorShadowRoot);
}
ShadowRoot* Element::shadowRoot() const
{
ElementShadow* elementShadow = shadow();
if (!elementShadow)
return 0;
ShadowRoot* shadowRoot = elementShadow->youngestShadowRoot();
if (shadowRoot->type() == ShadowRoot::AuthorShadowRoot)
return shadowRoot;
return 0;
}
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;
}
static void inline checkForEmptyStyleChange(Element* element, RenderStyle* style)
{
if (!style && !element->styleAffectedByEmpty())
return;
if (!style || (element->styleAffectedByEmpty() && (!style->emptyState() || element->hasChildNodes())))
element->setNeedsStyleRecalc();
}
static void checkForSiblingStyleChanges(Element* e, RenderStyle* style, bool finishedParsingCallback,
Node* beforeChange, Node* afterChange, int childCountDelta)
{
if (!e->inActiveDocument() || e->document().hasPendingForcedStyleRecalc() || e->styleChangeType() >= SubtreeStyleChange)
return;
// :empty selector.
checkForEmptyStyleChange(e, style);
if (!style || (e->needsStyleRecalc() && e->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 ((e->childrenAffectedByForwardPositionalRules() && afterChange) || (e->childrenAffectedByBackwardPositionalRules() && beforeChange)) {
e->setNeedsStyleRecalc();
return;
}
// :first-child. In the parser callback case, we don't have to check anything, since we were right the first time.
// In the DOM case, we only need to do something if |afterChange| is not 0.
// |afterChange| is 0 in the parser case, so it works out that we'll skip this block.
if (e->childrenAffectedByFirstChildRules() && afterChange) {
// Find our new first child.
Node* newFirstChild = e->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();
// We also have to handle node removal.
if (childCountDelta < 0 && newFirstChild == firstElementAfterInsertion && newFirstChild && (!newFirstChildStyle || !newFirstChildStyle->firstChildState()))
newFirstChild->setNeedsStyleRecalc();
}
// :last-child. In the parser callback case, we don't have to check anything, since we were right the first time.
// In the DOM case, we only need to do something if |afterChange| is not 0.
if (e->childrenAffectedByLastChildRules() && beforeChange) {
// Find our new last child.
Node* newLastChild = e->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();
// 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();
}
// The + selector. We need to invalidate the first element following the insertion point. It is the only possible element
// that could be affected by this DOM change.
if (e->childrenAffectedByDirectAdjacentRules() && afterChange) {
if (Node* firstElementAfterInsertion = afterChange->isElementNode() ? afterChange : afterChange->nextElementSibling())
firstElementAfterInsertion->setNeedsStyleRecalc();
}
}
void Element::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
{
ContainerNode::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
if (changedByParser)
checkForEmptyStyleChange(this, renderStyle());
else
checkForSiblingStyleChanges(this, renderStyle(), false, beforeChange, afterChange, childCountDelta);
if (ElementShadow* shadow = this->shadow())
shadow->setNeedsDistributionRecalc();
}
void Element::removeAllEventListeners()
{
ContainerNode::removeAllEventListeners();
if (ElementShadow* shadow = this->shadow())
shadow->removeAllEventListeners();
}
void Element::beginParsingChildren()
{
clearIsParsingChildrenFinished();
}
void Element::finishParsingChildren()
{
setIsParsingChildrenFinished();
checkForSiblingStyleChanges(this, renderStyle(), true, lastChild(), 0, 0);
if (isCustomElement())
CustomElement::didFinishParsingChildren(this);
}
#ifndef NDEBUG
void Element::formatForDebugger(char* buffer, unsigned length) const
{
StringBuilder result;
String s;
result.append(nodeName());
s = getIdAttribute();
if (s.length() > 0) {
if (result.length() > 0)
result.appendLiteral("; ");
result.appendLiteral("id=");
result.append(s);
}
s = getAttribute(classAttr);
if (s.length() > 0) {
if (result.length() > 0)
result.appendLiteral("; ");
result.appendLiteral("class=");
result.append(s);
}
strncpy(buffer, result.toString().utf8().data(), length - 1);
}
#endif
const Vector<RefPtr<Attr> >& Element::attrNodeList()
{
ASSERT(hasSyntheticAttrChildNodes());
return *attrNodeListForElement(this);
}
PassRefPtr<Attr> Element::setAttributeNode(Attr* attrNode, ExceptionState& es)
{
if (!attrNode) {
es.throwUninformativeAndGenericDOMException(TypeMismatchError);
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()) {
es.throwUninformativeAndGenericDOMException(InUseAttributeError);
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::setAttributeNodeNS(Attr* attr, ExceptionState& es)
{
return setAttributeNode(attr, es);
}
PassRefPtr<Attr> Element::removeAttributeNode(Attr* attr, ExceptionState& es)
{
if (!attr) {
es.throwUninformativeAndGenericDOMException(TypeMismatchError);
return 0;
}
if (attr->ownerElement() != this) {
es.throwUninformativeAndGenericDOMException(NotFoundError);
return 0;
}
ASSERT(document() == attr->document());
synchronizeAttribute(attr->qualifiedName());
size_t index = elementData()->getAttrIndex(attr);
if (index == kNotFound) {
es.throwUninformativeAndGenericDOMException(NotFoundError);
return 0;
}
RefPtr<Attr> guard(attr);
detachAttrNodeAtIndex(attr, index);
return guard.release();
}
bool Element::parseAttributeName(QualifiedName& out, const AtomicString& namespaceURI, const AtomicString& qualifiedName, ExceptionState& es)
{
String prefix, localName;
if (!Document::parseQualifiedName(qualifiedName, prefix, localName, es))
return false;
ASSERT(!es.hadException());
QualifiedName qName(prefix, localName, namespaceURI);
if (!Document::hasValidNamespaceForAttributes(qName)) {
es.throwUninformativeAndGenericDOMException(NamespaceError);
return false;
}
out = qName;
return true;
}
void Element::setAttributeNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, const AtomicString& value, ExceptionState& es)
{
QualifiedName parsedName = anyName;
if (!parseAttributeName(parsedName, namespaceURI, qualifiedName, es))
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::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();
}
// pseudo is used via shadowPseudoId.
const AtomicString& Element::pseudo() const
{
return getAttribute(pseudoAttr);
}
const AtomicString& Element::part() const
{
return getAttribute(partAttr);
}
void Element::setPart(const AtomicString& value)
{
setAttribute(partAttr, value);
}
LayoutSize Element::minimumSizeForResizing() const
{
return hasRareData() ? elementRareData()->minimumSizeForResizing() : defaultMinimumSizeForResizing();
}
void Element::setMinimumSizeForResizing(const LayoutSize& size)
{
if (!hasRareData() && size == defaultMinimumSizeForResizing())
return;
ensureElementRareData().setMinimumSizeForResizing(size);
}
RenderStyle* Element::computedStyle(PseudoId pseudoElementSpecifier)
{
if (PseudoElement* element = pseudoElement(pseudoElementSpecifier))
return element->computedStyle();
// FIXME: Find and use the renderer from the pseudo element instead of the actual element so that the 'length'
// properties, which are only known by the renderer because it did the layout, will be correct and so that the
// values returned for the ":selection" pseudo-element will be correct.
if (RenderStyle* usedStyle = renderStyle()) {
if (pseudoElementSpecifier) {
RenderStyle* cachedPseudoStyle = usedStyle->getCachedPseudoStyle(pseudoElementSpecifier);
return cachedPseudoStyle ? cachedPseudoStyle : usedStyle;
} else
return usedStyle;
}
if (!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::setChildrenAffectedByHover(bool value)
{
if (value || hasRareData())
ensureElementRareData().setChildrenAffectedByHover(value);
}
void Element::setChildrenAffectedByActive(bool value)
{
if (value || hasRareData())
ensureElementRareData().setChildrenAffectedByActive(value);
}
void Element::setChildrenAffectedByDrag(bool value)
{
if (value || hasRareData())
ensureElementRareData().setChildrenAffectedByDrag(value);
}
void Element::setChildrenAffectedByFirstChildRules()
{
ensureElementRareData().setChildrenAffectedByFirstChildRules(true);
}
void Element::setChildrenAffectedByLastChildRules()
{
ensureElementRareData().setChildrenAffectedByLastChildRules(true);
}
void Element::setChildrenAffectedByDirectAdjacentRules()
{
ensureElementRareData().setChildrenAffectedByDirectAdjacentRules(true);
}
void Element::setChildrenAffectedByForwardPositionalRules()
{
ensureElementRareData().setChildrenAffectedByForwardPositionalRules(true);
}
void Element::setChildrenAffectedByBackwardPositionalRules()
{
ensureElementRareData().setChildrenAffectedByBackwardPositionalRules(true);
}
void Element::setChildIndex(unsigned index)
{
ElementRareData& rareData = ensureElementRareData();
if (RenderStyle* style = renderStyle())
style->setUnique();
rareData.setChildIndex(index);
}
bool Element::childrenSupportStyleSharing() const
{
if (!hasRareData())
return true;
return !rareDataChildrenAffectedByHover()
&& !rareDataChildrenAffectedByActive()
&& !rareDataChildrenAffectedByDrag()
&& !rareDataChildrenAffectedByFirstChildRules()
&& !rareDataChildrenAffectedByLastChildRules()
&& !rareDataChildrenAffectedByDirectAdjacentRules()
&& !rareDataChildrenAffectedByForwardPositionalRules()
&& !rareDataChildrenAffectedByBackwardPositionalRules();
}
bool Element::rareDataStyleAffectedByEmpty() const
{
ASSERT(hasRareData());
return elementRareData()->styleAffectedByEmpty();
}
bool Element::rareDataChildrenAffectedByHover() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByHover();
}
bool Element::rareDataChildrenAffectedByActive() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByActive();
}
bool Element::rareDataChildrenAffectedByDrag() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByDrag();
}
bool Element::rareDataChildrenAffectedByFirstChildRules() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByFirstChildRules();
}
bool Element::rareDataChildrenAffectedByLastChildRules() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByLastChildRules();
}
bool Element::rareDataChildrenAffectedByDirectAdjacentRules() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByDirectAdjacentRules();
}
bool Element::rareDataChildrenAffectedByForwardPositionalRules() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByForwardPositionalRules();
}
bool Element::rareDataChildrenAffectedByBackwardPositionalRules() const
{
ASSERT(hasRareData());
return elementRareData()->childrenAffectedByBackwardPositionalRules();
}
unsigned Element::rareDataChildIndex() const
{
ASSERT(hasRareData());
return elementRareData()->childIndex();
}
void Element::setIsInCanvasSubtree(bool isInCanvasSubtree)
{
ensureElementRareData().setIsInCanvasSubtree(isInCanvasSubtree);
}
bool Element::isInCanvasSubtree() const
{
return hasRareData() && elementRareData()->isInCanvasSubtree();
}
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::updateCallbackSelectors(RenderStyle* oldStyle, RenderStyle* newStyle)
{
const Vector<String> emptyVector;
const Vector<String>& oldCallbackSelectors = oldStyle ? oldStyle->callbackSelectors() : emptyVector;
const Vector<String>& newCallbackSelectors = newStyle ? newStyle->callbackSelectors() : emptyVector;
CSSSelectorWatch::from(document()).updateSelectorMatches(oldCallbackSelectors, newCallbackSelectors);
}
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)
{
PseudoElement* element = pseudoElement(pseudoId);
if (element && (needsStyleRecalc() || shouldRecalcStyle(change, element))) {
// PseudoElement styles hang off their parent element's style so if we needed
// a style recalc we should Force one on the pseudo.
element->recalcStyle(needsStyleRecalc() ? Force : change);
// Wait until our parent is not displayed or pseudoElementRendererIsNeeded
// is false, otherwise we could continously create and destroy PseudoElements
// when RenderObject::isChildAllowed on our parent returns false for the
// PseudoElement's renderer for each style recalc.
if (!renderer() || !pseudoElementRendererIsNeeded(renderer()->getCachedPseudoStyle(pseudoId)))
elementRareData()->setPseudoElement(pseudoId, 0);
} else if (change >= Inherit || needsStyleRecalc())
createPseudoElementIfNeeded(pseudoId);
}
void Element::createPseudoElementIfNeeded(PseudoId pseudoId)
{
if (needsPseudoElement(pseudoId))
createPseudoElement(pseudoId);
}
bool Element::needsPseudoElement(PseudoId pseudoId) const
{
if (pseudoId == BACKDROP && !isInTopLayer())
return false;
if (!renderer() || !pseudoElementRendererIsNeeded(renderer()->getCachedPseudoStyle(pseudoId)))
return false;
if (!renderer()->canHaveGeneratedChildren())
return false;
return true;
}
void Element::createPseudoElement(PseudoId pseudoId)
{
ASSERT(needsPseudoElement(pseudoId));
ASSERT(!isPseudoElement());
RefPtr<PseudoElement> element = PseudoElement::create(this, pseudoId);
if (pseudoId == BACKDROP)
document().addToTopLayer(element.get(), this);
element->attach();
ensureElementRareData().setPseudoElement(pseudoId, element.release());
}
PseudoElement* Element::pseudoElement(PseudoId pseudoId) const
{
return hasRareData() ? elementRareData()->pseudoElement(pseudoId) : 0;
}
RenderObject* Element::pseudoElementRenderer(PseudoId pseudoId) const
{
if (PseudoElement* element = pseudoElement(pseudoId))
return element->renderer();
return 0;
}
bool Element::webkitMatchesSelector(const String& selector, ExceptionState& es)
{
if (selector.isEmpty()) {
es.throwUninformativeAndGenericDOMException(SyntaxError);
return false;
}
SelectorQuery* selectorQuery = document().selectorQueryCache().add(selector, document(), es);
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