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Element.cpp
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Element.cpp
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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Peter Kelly (pmk@post.com)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* (C) 2007 David Smith (catfish.man@gmail.com)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
* (C) 2007 Eric Seidel (eric@webkit.org)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "Element.h"
#include "AXObjectCache.h"
#include "Attr.h"
#include "CSSParser.h"
#include "CSSSelectorList.h"
#include "CSSStyleSelector.h"
#include "ClassList.h"
#include "ClientRect.h"
#include "ClientRectList.h"
#include "DOMTokenList.h"
#include "DatasetDOMStringMap.h"
#include "Document.h"
#include "DocumentFragment.h"
#include "ElementRareData.h"
#include "ExceptionCode.h"
#include "FocusController.h"
#include "Frame.h"
#include "FrameView.h"
#include "HTMLElement.h"
#include "HTMLNames.h"
#include "HTMLParserIdioms.h"
#include "InspectorInstrumentation.h"
#include "NodeList.h"
#include "NodeRenderStyle.h"
#include "Page.h"
#include "RenderLayer.h"
#include "RenderView.h"
#include "RenderWidget.h"
#include "Settings.h"
#include "ShadowRoot.h"
#include "TextIterator.h"
#include "WebKitAnimationList.h"
#include "XMLNames.h"
#include "htmlediting.h"
#include <wtf/text/CString.h>
#if ENABLE(SVG)
#include "SVGElement.h"
#include "SVGNames.h"
#endif
namespace WebCore {
using namespace HTMLNames;
using namespace XMLNames;
class StyleSelectorParentPusher {
public:
StyleSelectorParentPusher(Element* parent)
: m_parent(parent)
, m_pushedStyleSelector(0)
{
}
void push()
{
if (m_pushedStyleSelector)
return;
m_pushedStyleSelector = m_parent->document()->styleSelector();
m_pushedStyleSelector->pushParent(m_parent);
}
~StyleSelectorParentPusher()
{
if (!m_pushedStyleSelector)
return;
// This tells us that our pushed style selector is in a bad state,
// so we should just bail out in that scenario.
ASSERT(m_pushedStyleSelector == m_parent->document()->styleSelector());
if (m_pushedStyleSelector != m_parent->document()->styleSelector())
return;
m_pushedStyleSelector->popParent(m_parent);
}
private:
Element* m_parent;
CSSStyleSelector* m_pushedStyleSelector;
};
PassRefPtr<Element> Element::create(const QualifiedName& tagName, Document* document)
{
return adoptRef(new Element(tagName, document, CreateElement));
}
Element::~Element()
{
removeShadowRoot();
if (m_attributeMap)
m_attributeMap->detachFromElement();
}
inline ElementRareData* Element::rareData() const
{
ASSERT(hasRareData());
return static_cast<ElementRareData*>(NodeRareData::rareDataFromMap(this));
}
inline ElementRareData* Element::ensureRareData()
{
return static_cast<ElementRareData*>(Node::ensureRareData());
}
NodeRareData* Element::createRareData()
{
return new ElementRareData;
}
DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(Element, blur);
DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(Element, error);
DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(Element, focus);
DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(Element, load);
PassRefPtr<DocumentFragment> Element::deprecatedCreateContextualFragment(const String& markup, FragmentScriptingPermission scriptingPermission)
{
RefPtr<DocumentFragment> fragment = document()->createDocumentFragment();
if (document()->isHTMLDocument())
fragment->parseHTML(markup, this, scriptingPermission);
else {
if (!fragment->parseXML(markup, this, scriptingPermission))
// FIXME: We should propagate a syntax error exception out here.
return 0;
}
// Exceptions are ignored because none ought to happen here.
ExceptionCode ignoredExceptionCode;
// We need to pop <html> and <body> elements and remove <head> to
// accommodate folks passing complete HTML documents to make the
// child of an element.
RefPtr<Node> nextNode;
for (RefPtr<Node> node = fragment->firstChild(); node; node = nextNode) {
nextNode = node->nextSibling();
if (node->hasTagName(htmlTag) || node->hasTagName(bodyTag)) {
HTMLElement* element = toHTMLElement(node.get());
Node* firstChild = element->firstChild();
if (firstChild)
nextNode = firstChild;
RefPtr<Node> nextChild;
for (RefPtr<Node> child = firstChild; child; child = nextChild) {
nextChild = child->nextSibling();
element->removeChild(child.get(), ignoredExceptionCode);
ASSERT(!ignoredExceptionCode);
fragment->insertBefore(child, element, ignoredExceptionCode);
ASSERT(!ignoredExceptionCode);
}
fragment->removeChild(element, ignoredExceptionCode);
ASSERT(!ignoredExceptionCode);
} else if (node->hasTagName(headTag)) {
fragment->removeChild(node.get(), ignoredExceptionCode);
ASSERT(!ignoredExceptionCode);
}
}
return fragment.release();
}
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());
// Call attributes(true) to force attribute synchronization to occur for SVG and style attributes.
if (NamedNodeMap* attributeMap = attributes(true))
clone->attributes()->setAttributes(*attributeMap);
clone->copyNonAttributeProperties(this);
return clone.release();
}
PassRefPtr<Element> Element::cloneElementWithoutAttributesAndChildren() const
{
return document()->createElement(tagQName(), false);
}
void Element::removeAttribute(const QualifiedName& name, ExceptionCode& ec)
{
if (m_attributeMap) {
ec = 0;
m_attributeMap->removeNamedItem(name, ec);
if (ec == NOT_FOUND_ERR)
ec = 0;
}
}
void Element::setAttribute(const QualifiedName& name, const AtomicString& value)
{
ExceptionCode ec;
setAttribute(name, value, ec);
}
void Element::setCStringAttribute(const QualifiedName& name, const char* cStringValue)
{
ExceptionCode ec;
setAttribute(name, AtomicString(cStringValue), ec);
}
void Element::setBooleanAttribute(const QualifiedName& name, bool b)
{
if (b)
setAttribute(name, emptyAtom);
else {
ExceptionCode ex;
removeAttribute(name, ex);
}
}
Node::NodeType Element::nodeType() const
{
return ELEMENT_NODE;
}
bool Element::hasAttribute(const QualifiedName& name) const
{
return hasAttributeNS(name.namespaceURI(), name.localName());
}
const AtomicString& Element::getAttribute(const QualifiedName& name) const
{
if (UNLIKELY(name == styleAttr) && !isStyleAttributeValid())
updateStyleAttribute();
#if ENABLE(SVG)
if (UNLIKELY(!areSVGAttributesValid()))
updateAnimatedSVGAttribute(name);
#endif
return fastGetAttribute(name);
}
void Element::scrollIntoView(bool alignToTop)
{
document()->updateLayoutIgnorePendingStylesheets();
IntRect bounds = getRect();
if (renderer()) {
// Align to the top / bottom and to the closest edge.
if (alignToTop)
renderer()->enclosingLayer()->scrollRectToVisible(bounds, false, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignTopAlways);
else
renderer()->enclosingLayer()->scrollRectToVisible(bounds, false, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignBottomAlways);
}
}
void Element::scrollIntoViewIfNeeded(bool centerIfNeeded)
{
document()->updateLayoutIgnorePendingStylesheets();
IntRect bounds = getRect();
if (renderer()) {
if (centerIfNeeded)
renderer()->enclosingLayer()->scrollRectToVisible(bounds, false, ScrollAlignment::alignCenterIfNeeded, ScrollAlignment::alignCenterIfNeeded);
else
renderer()->enclosingLayer()->scrollRectToVisible(bounds, false, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignToEdgeIfNeeded);
}
}
void Element::scrollByUnits(int units, ScrollGranularity granularity)
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject *rend = renderer()) {
if (rend->hasOverflowClip()) {
ScrollDirection direction = ScrollDown;
if (units < 0) {
direction = ScrollUp;
units = -units;
}
toRenderBox(rend)->layer()->scroll(direction, granularity, units);
}
}
}
void Element::scrollByLines(int lines)
{
scrollByUnits(lines, ScrollByLine);
}
void Element::scrollByPages(int pages)
{
scrollByUnits(pages, ScrollByPage);
}
static float localZoomForRenderer(RenderObject* renderer)
{
// FIXME: This does the wrong thing if two opposing zooms are in effect and canceled each
// other out, but the alternative is that we'd have to crawl up the whole render tree every
// time (or store an additional bit in the RenderStyle to indicate that a zoom was specified).
float zoomFactor = 1;
if (renderer->style()->effectiveZoom() != 1) {
// Need to find the nearest enclosing RenderObject that set up
// a differing zoom, and then we divide our result by it to eliminate the zoom.
RenderObject* prev = renderer;
for (RenderObject* curr = prev->parent(); curr; curr = curr->parent()) {
if (curr->style()->effectiveZoom() != prev->style()->effectiveZoom()) {
zoomFactor = prev->style()->zoom();
break;
}
prev = curr;
}
if (prev->isRenderView())
zoomFactor = prev->style()->zoom();
}
return zoomFactor;
}
static int adjustForLocalZoom(int value, RenderObject* renderer)
{
float zoomFactor = localZoomForRenderer(renderer);
if (zoomFactor == 1)
return value;
// Needed because computeLengthInt truncates (rather than rounds) when scaling up.
if (zoomFactor > 1)
value++;
return static_cast<int>(value / zoomFactor);
}
int Element::offsetLeft()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* rend = renderBoxModelObject())
return adjustForLocalZoom(rend->offsetLeft(), rend);
return 0;
}
int Element::offsetTop()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* rend = renderBoxModelObject())
return adjustForLocalZoom(rend->offsetTop(), rend);
return 0;
}
int Element::offsetWidth()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* rend = renderBoxModelObject())
return adjustForAbsoluteZoom(rend->offsetWidth(), rend);
return 0;
}
int Element::offsetHeight()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBoxModelObject* rend = renderBoxModelObject())
return adjustForAbsoluteZoom(rend->offsetHeight(), rend);
return 0;
}
Element* Element::offsetParent()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderObject* rend = renderer())
if (RenderObject* offsetParent = rend->offsetParent())
return static_cast<Element*>(offsetParent->node());
return 0;
}
int Element::clientLeft()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->clientLeft(), rend);
return 0;
}
int Element::clientTop()
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->clientTop(), rend);
return 0;
}
int Element::clientWidth()
{
document()->updateLayoutIgnorePendingStylesheets();
// When in strict mode, clientWidth for the document element should return the width of the containing frame.
// When in quirks mode, clientWidth for the body element should return the width of the containing frame.
bool inQuirksMode = document()->inQuirksMode();
if ((!inQuirksMode && document()->documentElement() == this) ||
(inQuirksMode && isHTMLElement() && document()->body() == this)) {
if (FrameView* view = document()->view()) {
if (RenderView* renderView = document()->renderView())
return adjustForAbsoluteZoom(view->layoutWidth(), renderView);
}
}
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->clientWidth(), rend);
return 0;
}
int Element::clientHeight()
{
document()->updateLayoutIgnorePendingStylesheets();
// When in strict mode, clientHeight for the document element should return the height of the containing frame.
// When in quirks mode, clientHeight for the body element should return the height of the containing frame.
bool inQuirksMode = document()->inQuirksMode();
if ((!inQuirksMode && document()->documentElement() == this) ||
(inQuirksMode && isHTMLElement() && document()->body() == this)) {
if (FrameView* view = document()->view()) {
if (RenderView* renderView = document()->renderView())
return adjustForAbsoluteZoom(view->layoutHeight(), renderView);
}
}
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->clientHeight(), rend);
return 0;
}
int Element::scrollLeft() const
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollLeft(), rend);
return 0;
}
int Element::scrollTop() const
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollTop(), rend);
return 0;
}
void Element::setScrollLeft(int newLeft)
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
rend->setScrollLeft(static_cast<int>(newLeft * rend->style()->effectiveZoom()));
}
void Element::setScrollTop(int newTop)
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
rend->setScrollTop(static_cast<int>(newTop * rend->style()->effectiveZoom()));
}
int Element::scrollWidth() const
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollWidth(), rend);
return 0;
}
int Element::scrollHeight() const
{
document()->updateLayoutIgnorePendingStylesheets();
if (RenderBox* rend = renderBox())
return adjustForAbsoluteZoom(rend->scrollHeight(), rend);
return 0;
}
IntRect Element::boundsInWindowSpace() const
{
document()->updateLayoutIgnorePendingStylesheets();
FrameView* view = document()->view();
if (!view)
return IntRect();
Vector<FloatQuad> quads;
#if ENABLE(SVG)
if (isSVGElement() && renderer()) {
// Get the bounding rectangle from the SVG model.
const SVGElement* svgElement = static_cast<const SVGElement*>(this);
FloatRect localRect;
if (svgElement->boundingBox(localRect))
quads.append(renderer()->localToAbsoluteQuad(localRect));
} else
#endif
{
// Get the bounding rectangle from the box model.
if (renderBoxModelObject())
renderBoxModelObject()->absoluteQuads(quads);
}
if (quads.isEmpty())
return IntRect();
IntRect result = quads[0].enclosingBoundingBox();
for (size_t i = 1; i < quads.size(); ++i)
result.unite(quads[i].enclosingBoundingBox());
result = view->contentsToWindow(result);
return result;
}
PassRefPtr<ClientRectList> Element::getClientRects() const
{
document()->updateLayoutIgnorePendingStylesheets();
RenderBoxModelObject* renderBoxModelObject = this->renderBoxModelObject();
if (!renderBoxModelObject)
return ClientRectList::create();
// FIXME: Handle SVG elements.
// FIXME: Handle table/inline-table with a caption.
Vector<FloatQuad> quads;
renderBoxModelObject->absoluteQuads(quads);
float pageScale = 1;
if (Page* page = document()->page()) {
if (Frame* frame = page->mainFrame())
pageScale = frame->pageScaleFactor();
}
if (FrameView* view = document()->view()) {
IntRect visibleContentRect = view->visibleContentRect();
for (size_t i = 0; i < quads.size(); ++i) {
quads[i].move(-visibleContentRect.x(), -visibleContentRect.y());
adjustFloatQuadForAbsoluteZoom(quads[i], renderBoxModelObject);
if (pageScale != 1)
adjustFloatQuadForPageScale(quads[i], pageScale);
}
}
return ClientRectList::create(quads);
}
PassRefPtr<ClientRect> Element::getBoundingClientRect() const
{
document()->updateLayoutIgnorePendingStylesheets();
Vector<FloatQuad> quads;
#if ENABLE(SVG)
if (isSVGElement() && renderer()) {
// Get the bounding rectangle from the SVG model.
const SVGElement* svgElement = static_cast<const SVGElement*>(this);
FloatRect localRect;
if (svgElement->boundingBox(localRect))
quads.append(renderer()->localToAbsoluteQuad(localRect));
} else
#endif
{
// Get the bounding rectangle from the box model.
if (renderBoxModelObject())
renderBoxModelObject()->absoluteQuads(quads);
}
if (quads.isEmpty())
return ClientRect::create();
FloatRect result = quads[0].boundingBox();
for (size_t i = 1; i < quads.size(); ++i)
result.unite(quads[i].boundingBox());
if (FrameView* view = document()->view()) {
IntRect visibleContentRect = view->visibleContentRect();
result.move(-visibleContentRect.x(), -visibleContentRect.y());
}
adjustFloatRectForAbsoluteZoom(result, renderer());
if (Page* page = document()->page()) {
if (Frame* frame = page->mainFrame())
adjustFloatRectForPageScale(result, frame->pageScaleFactor());
}
return ClientRect::create(result);
}
IntRect Element::screenRect() const
{
if (!renderer())
return IntRect();
return renderer()->view()->frameView()->contentsToScreen(renderer()->absoluteBoundingBoxRect());
}
static inline bool shouldIgnoreAttributeCase(const Element* e)
{
return e && e->document()->isHTMLDocument() && e->isHTMLElement();
}
const AtomicString& Element::getAttribute(const String& name) const
{
bool ignoreCase = shouldIgnoreAttributeCase(this);
// Update the 'style' attribute if it's invalid and being requested:
if (!isStyleAttributeValid() && equalPossiblyIgnoringCase(name, styleAttr.localName(), ignoreCase))
updateStyleAttribute();
#if ENABLE(SVG)
if (!areSVGAttributesValid()) {
// We're not passing a namespace argument on purpose. SVGNames::*Attr are defined w/o namespaces as well.
updateAnimatedSVGAttribute(QualifiedName(nullAtom, name, nullAtom));
}
#endif
if (m_attributeMap) {
if (Attribute* attribute = m_attributeMap->getAttributeItem(name, ignoreCase))
return attribute->value();
}
return nullAtom;
}
const AtomicString& Element::getAttributeNS(const String& namespaceURI, const String& localName) const
{
return getAttribute(QualifiedName(nullAtom, localName, namespaceURI));
}
void Element::setAttribute(const AtomicString& name, const AtomicString& value, ExceptionCode& ec)
{
if (!Document::isValidName(name)) {
ec = INVALID_CHARACTER_ERR;
return;
}
#if ENABLE(INSPECTOR)
if (!isSynchronizingStyleAttribute())
InspectorInstrumentation::willModifyDOMAttr(document(), this);
#endif
const AtomicString& localName = shouldIgnoreAttributeCase(this) ? name.lower() : name;
QualifiedName attributeName(nullAtom, localName, nullAtom);
// Allocate attribute map if necessary.
Attribute* old = attributes(false)->getAttributeItem(localName, false);
document()->incDOMTreeVersion();
if (isIdAttributeName(old ? old->name() : attributeName))
updateId(old ? old->value() : nullAtom, value);
if (old && value.isNull())
m_attributeMap->removeAttribute(old->name());
else if (!old && !value.isNull())
m_attributeMap->addAttribute(createAttribute(attributeName, value));
else if (old && !value.isNull()) {
if (Attr* attrNode = old->attr())
attrNode->setValue(value);
else
old->setValue(value);
attributeChanged(old);
}
#if ENABLE(INSPECTOR)
if (!isSynchronizingStyleAttribute())
InspectorInstrumentation::didModifyDOMAttr(document(), this);
#endif
}
void Element::setAttribute(const QualifiedName& name, const AtomicString& value, ExceptionCode&)
{
#if ENABLE(INSPECTOR)
if (!isSynchronizingStyleAttribute())
InspectorInstrumentation::willModifyDOMAttr(document(), this);
#endif
document()->incDOMTreeVersion();
// Allocate attribute map if necessary.
Attribute* old = attributes(false)->getAttributeItem(name);
if (isIdAttributeName(name))
updateId(old ? old->value() : nullAtom, value);
if (old && value.isNull())
m_attributeMap->removeAttribute(name);
else if (!old && !value.isNull())
m_attributeMap->addAttribute(createAttribute(name, value));
else if (old) {
if (Attr* attrNode = old->attr())
attrNode->setValue(value);
else
old->setValue(value);
attributeChanged(old);
}
#if ENABLE(INSPECTOR)
if (!isSynchronizingStyleAttribute())
InspectorInstrumentation::didModifyDOMAttr(document(), this);
#endif
}
PassRefPtr<Attribute> Element::createAttribute(const QualifiedName& name, const AtomicString& value)
{
return Attribute::create(name, value);
}
void Element::attributeChanged(Attribute* attr, bool)
{
if (isIdAttributeName(attr->name()))
idAttributeChanged(attr);
recalcStyleIfNeededAfterAttributeChanged(attr);
updateAfterAttributeChanged(attr);
}
void Element::updateAfterAttributeChanged(Attribute* attr)
{
if (!AXObjectCache::accessibilityEnabled())
return;
const QualifiedName& attrName = attr->name();
if (attrName == aria_activedescendantAttr) {
// any change to aria-activedescendant attribute triggers accessibility focus change, but document focus remains intact
document()->axObjectCache()->handleActiveDescendantChanged(renderer());
} else if (attrName == roleAttr) {
// the role attribute can change at any time, and the AccessibilityObject must pick up these changes
document()->axObjectCache()->handleAriaRoleChanged(renderer());
} else if (attrName == aria_valuenowAttr) {
// If the valuenow attribute changes, AX clients need to be notified.
document()->axObjectCache()->postNotification(renderer(), AXObjectCache::AXValueChanged, true);
} else if (attrName == aria_labelAttr || attrName == aria_labeledbyAttr || attrName == altAttr || attrName == titleAttr) {
// If the content of an element changes due to an attribute change, notify accessibility.
document()->axObjectCache()->contentChanged(renderer());
} else if (attrName == aria_selectedAttr)
document()->axObjectCache()->selectedChildrenChanged(renderer());
else if (attrName == aria_expandedAttr)
document()->axObjectCache()->handleAriaExpandedChange(renderer());
else if (attrName == aria_hiddenAttr)
document()->axObjectCache()->childrenChanged(renderer());
else if (attrName == aria_invalidAttr)
document()->axObjectCache()->postNotification(renderer(), AXObjectCache::AXInvalidStatusChanged, true);
}
void Element::recalcStyleIfNeededAfterAttributeChanged(Attribute* attr)
{
if (document()->attached() && document()->styleSelector()->hasSelectorForAttribute(attr->name().localName()))
setNeedsStyleRecalc();
}
void Element::idAttributeChanged(Attribute* attr)
{
setHasID(!attr->isNull());
if (attributeMap()) {
if (attr->isNull())
attributeMap()->setIdForStyleResolution(nullAtom);
else if (document()->inQuirksMode())
attributeMap()->setIdForStyleResolution(attr->value().lower());
else
attributeMap()->setIdForStyleResolution(attr->value());
}
setNeedsStyleRecalc();
}
// Returns true is the given attribute is an event handler.
// We consider an event handler any attribute that begins with "on".
// It is a simple solution that has the advantage of not requiring any
// code or configuration change if a new event handler is defined.
static bool isEventHandlerAttribute(const QualifiedName& name)
{
return name.namespaceURI().isNull() && name.localName().startsWith("on");
}
static bool isAttributeToRemove(const QualifiedName& name, const AtomicString& value)
{
return (name.localName().endsWith(hrefAttr.localName()) || name == srcAttr || name == actionAttr) && protocolIsJavaScript(stripLeadingAndTrailingHTMLSpaces(value));
}
void Element::setAttributeMap(PassRefPtr<NamedNodeMap> list, FragmentScriptingPermission scriptingPermission)
{
document()->incDOMTreeVersion();
// If setting the whole map changes the id attribute, we need to call updateId.
const QualifiedName& idName = document()->idAttributeName();
Attribute* oldId = m_attributeMap ? m_attributeMap->getAttributeItem(idName) : 0;
Attribute* newId = list ? list->getAttributeItem(idName) : 0;
if (oldId || newId)
updateId(oldId ? oldId->value() : nullAtom, newId ? newId->value() : nullAtom);
if (m_attributeMap)
m_attributeMap->m_element = 0;
m_attributeMap = list;
if (m_attributeMap) {
m_attributeMap->m_element = this;
// If the element is created as result of a paste or drag-n-drop operation
// we want to remove all the script and event handlers.
if (scriptingPermission == FragmentScriptingNotAllowed) {
unsigned i = 0;
while (i < m_attributeMap->length()) {
const QualifiedName& attributeName = m_attributeMap->m_attributes[i]->name();
if (isEventHandlerAttribute(attributeName)) {
m_attributeMap->m_attributes.remove(i);
continue;
}
if (isAttributeToRemove(attributeName, m_attributeMap->m_attributes[i]->value()))
m_attributeMap->m_attributes[i]->setValue(nullAtom);
i++;
}
}
// Store the set of attributes that changed on the stack in case
// attributeChanged mutates m_attributeMap.
Vector<RefPtr<Attribute> > attributes;
m_attributeMap->copyAttributesToVector(attributes);
for (Vector<RefPtr<Attribute> >::iterator iter = attributes.begin(); iter != attributes.end(); ++iter)
attributeChanged(iter->get());
// FIXME: What about attributes that were in the old map that are not in the new map?
}
}
bool Element::hasAttributes() const
{
if (!isStyleAttributeValid())
updateStyleAttribute();
#if ENABLE(SVG)
if (!areSVGAttributesValid())
updateAnimatedSVGAttribute(anyQName());
#endif
return m_attributeMap && m_attributeMap->length();
}
String Element::nodeName() const
{
return m_tagName.toString();
}
String Element::nodeNamePreservingCase() const
{
return m_tagName.toString();
}
void Element::setPrefix(const AtomicString& prefix, ExceptionCode& ec)
{
ec = 0;
checkSetPrefix(prefix, ec);
if (ec)
return;
m_tagName.setPrefix(prefix.isEmpty() ? AtomicString() : prefix);
}
KURL Element::baseURI() const
{
const AtomicString& baseAttribute = getAttribute(baseAttr);
KURL base(KURL(), baseAttribute);
if (!base.protocol().isEmpty())
return base;
ContainerNode* parent = parentNode();
if (!parent)
return base;
const KURL& parentBase = parent->baseURI();
if (parentBase.isNull())
return base;
return KURL(parentBase, baseAttribute);
}
void Element::createAttributeMap() const
{
m_attributeMap = NamedNodeMap::create(const_cast<Element*>(this));
}
bool Element::isURLAttribute(Attribute*) const
{
return false;
}
const QualifiedName& Element::imageSourceAttributeName() const
{
return srcAttr;
}
RenderObject* Element::createRenderer(RenderArena* arena, RenderStyle* style)
{
if (document()->documentElement() == this && style->display() == NONE) {
// Ignore display: none on root elements. Force a display of block in that case.
RenderBlock* result = new (arena) RenderBlock(this);
if (result)
result->setAnimatableStyle(style);
return result;
}
return RenderObject::createObject(this, style);
}
bool Element::wasChangedSinceLastFormControlChangeEvent() const
{
return false;
}
void Element::setChangedSinceLastFormControlChangeEvent(bool)
{
}
void Element::insertedIntoDocument()
{
// need to do superclass processing first so inDocument() is true
// by the time we reach updateId
ContainerNode::insertedIntoDocument();
if (Node* shadow = shadowRoot())
shadow->insertedIntoDocument();
if (hasID()) {
if (m_attributeMap) {
Attribute* idItem = m_attributeMap->getAttributeItem(document()->idAttributeName());
if (idItem && !idItem->isNull())
updateId(nullAtom, idItem->value());
}
}
}
void Element::removedFromDocument()
{
if (hasID()) {
if (m_attributeMap) {
Attribute* idItem = m_attributeMap->getAttributeItem(document()->idAttributeName());
if (idItem && !idItem->isNull())
updateId(idItem->value(), nullAtom);
}
}
ContainerNode::removedFromDocument();
if (Node* shadow = shadowRoot())
shadow->removedFromDocument();
}
void Element::insertedIntoTree(bool deep)
{
ContainerNode::insertedIntoTree(deep);
if (!deep)
return;
if (Node* shadow = shadowRoot())
shadow->insertedIntoTree(true);
}
void Element::removedFromTree(bool deep)
{
ContainerNode::removedFromTree(deep);
if (!deep)
return;
if (Node* shadow = shadowRoot())
shadow->removedFromTree(true);
}
void Element::attach()
{
suspendPostAttachCallbacks();
RenderWidget::suspendWidgetHierarchyUpdates();
createRendererIfNeeded();
StyleSelectorParentPusher parentPusher(this);
if (Node* shadow = shadowRoot()) {
parentPusher.push();
shadow->attach();
}
if (firstChild())