--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/dom/Element.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,1590 @@
+/*
+ * 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 "ClientRect.h"
+#include "ClientRectList.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 "InspectorController.h"
+#include "NodeList.h"
+#include "NodeRenderStyle.h"
+#include "Page.h"
+#include "RenderLayer.h"
+#include "RenderView.h"
+#include "RenderWidget.h"
+#include "TextIterator.h"
+#include "XMLNames.h"
+#include <wtf/text/CString.h>
+
+#if ENABLE(SVG)
+#include "SVGNames.h"
+#endif
+
+namespace WebCore {
+
+using namespace HTMLNames;
+using namespace XMLNames;
+
+PassRefPtr<Element> Element::create(const QualifiedName& tagName, Document* document)
+{
+ return adoptRef(new Element(tagName, document, CreateElement));
+}
+
+Element::~Element()
+{
+ 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;
+}
+
+PassRefPtr<DocumentFragment> Element::createContextualFragment(const String& markup, FragmentScriptingPermission scriptingPermission)
+{
+ RefPtr<DocumentFragment> fragment = document()->createDocumentFragment();
+
+ if (document()->isHTMLDocument())
+ fragment->parseHTML(markup, 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)) {
+ Node* firstChild = node->firstChild();
+ if (firstChild)
+ nextNode = firstChild;
+ RefPtr<Node> nextChild;
+ for (RefPtr<Node> child = firstChild; child; child = nextChild) {
+ nextChild = child->nextSibling();
+ node->removeChild(child.get(), ignoredExceptionCode);
+ ASSERT(!ignoredExceptionCode);
+ fragment->insertBefore(child, node.get(), ignoredExceptionCode);
+ ASSERT(!ignoredExceptionCode);
+ }
+ fragment->removeChild(node.get(), 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 = document()->createElement(tagQName(), false);
+ // 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();
+}
+
+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 = 1.0f;
+ if (renderer->style()->effectiveZoom() != 1.0f) {
+ // 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 inCompatMode = document()->inCompatMode();
+ if ((!inCompatMode && document()->documentElement() == this) ||
+ (inCompatMode && 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 inCompatMode = document()->inCompatMode();
+
+ if ((!inCompatMode && document()->documentElement() == this) ||
+ (inCompatMode && 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;
+}
+
+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);
+
+ 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);
+ }
+ }
+
+ return ClientRectList::create(quads);
+}
+
+PassRefPtr<ClientRect> Element::getBoundingClientRect() const
+{
+ document()->updateLayoutIgnorePendingStylesheets();
+ RenderBoxModelObject* renderBoxModelObject = this->renderBoxModelObject();
+ if (!renderBoxModelObject)
+ return ClientRect::create();
+
+ Vector<FloatQuad> quads;
+ renderBoxModelObject->absoluteQuads(quads);
+
+ if (quads.isEmpty())
+ return ClientRect::create();
+
+ IntRect result = quads[0].enclosingBoundingBox();
+ for (size_t i = 1; i < quads.size(); ++i)
+ result.unite(quads[i].enclosingBoundingBox());
+
+ if (FrameView* view = document()->view()) {
+ IntRect visibleContentRect = view->visibleContentRect();
+ result.move(-visibleContentRect.x(), -visibleContentRect.y());
+ }
+
+ adjustIntRectForAbsoluteZoom(result, renderBoxModelObject);
+
+ return ClientRect::create(result);
+}
+
+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 COMPILER(RVCT)
+ const AtomicString localName = shouldIgnoreAttributeCase(this) ? name.lower() : name;
+#else
+ const AtomicString& localName = shouldIgnoreAttributeCase(this) ? name.lower() : name;
+#endif
+
+ // Allocate attribute map if necessary.
+ Attribute* old = attributes(false)->getAttributeItem(localName, false);
+
+ document()->incDOMTreeVersion();
+
+ // FIXME: This check is probably not correct for the case where the document has an id attribute
+ // with a non-null namespace, because it will return true if the local name happens to match
+ // but the namespace does not.
+ if (localName == document()->idAttributeName().localName())
+ updateId(old ? old->value() : nullAtom, value);
+
+ if (old && value.isNull())
+ m_attributeMap->removeAttribute(old->name());
+ else if (!old && !value.isNull())
+ m_attributeMap->addAttribute(createAttribute(QualifiedName(nullAtom, localName, nullAtom), value));
+ else if (old && !value.isNull()) {
+ old->setValue(value);
+ attributeChanged(old);
+ }
+
+#if ENABLE(INSPECTOR)
+ if (Page* page = document()->page()) {
+ if (InspectorController* inspectorController = page->inspectorController()) {
+ if (!isSynchronizingStyleAttribute())
+ inspectorController->didModifyDOMAttr(this);
+ }
+ }
+#endif
+}
+
+void Element::setAttribute(const QualifiedName& name, const AtomicString& value, ExceptionCode&)
+{
+ 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) {
+ old->setValue(value);
+ attributeChanged(old);
+ }
+
+#if ENABLE(INSPECTOR)
+ if (Page* page = document()->page()) {
+ if (InspectorController* inspectorController = page->inspectorController()) {
+ if (!isSynchronizingStyleAttribute())
+ inspectorController->didModifyDOMAttr(this);
+ }
+ }
+#endif
+}
+
+PassRefPtr<Attribute> Element::createAttribute(const QualifiedName& name, const AtomicString& value)
+{
+ return Attribute::create(name, value);
+}
+
+void Element::attributeChanged(Attribute* attr, bool)
+{
+ 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());
+}
+
+void Element::recalcStyleIfNeededAfterAttributeChanged(Attribute* attr)
+{
+ if (document()->attached() && document()->styleSelector()->hasSelectorForAttribute(attr->name().localName()))
+ 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(deprecatedParseURL(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++;
+ }
+ }
+ unsigned len = m_attributeMap->length();
+ for (unsigned i = 0; i < len; i++)
+ attributeChanged(m_attributeMap->m_attributes[i].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;
+
+ Node* 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);
+}
+
+
+void Element::insertedIntoDocument()
+{
+ // need to do superclass processing first so inDocument() is true
+ // by the time we reach updateId
+ ContainerNode::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();
+}
+
+void Element::attach()
+{
+ suspendPostAttachCallbacks();
+ RenderWidget::suspendWidgetHierarchyUpdates();
+
+ createRendererIfNeeded();
+ ContainerNode::attach();
+ if (hasRareData()) {
+ ElementRareData* data = rareData();
+ if (data->needsFocusAppearanceUpdateSoonAfterAttach()) {
+ if (isFocusable() && document()->focusedNode() == this)
+ document()->updateFocusAppearanceSoon(false /* don't restore selection */);
+ data->setNeedsFocusAppearanceUpdateSoonAfterAttach(false);
+ }
+ }
+
+ RenderWidget::resumeWidgetHierarchyUpdates();
+ resumePostAttachCallbacks();
+}
+
+void Element::detach()
+{
+ RenderWidget::suspendWidgetHierarchyUpdates();
+
+ cancelFocusAppearanceUpdate();
+ if (hasRareData())
+ rareData()->resetComputedStyle();
+ ContainerNode::detach();
+
+ RenderWidget::resumeWidgetHierarchyUpdates();
+}
+
+bool Element::pseudoStyleCacheIsInvalid(const RenderStyle* currentStyle, RenderStyle* newStyle)
+{
+ ASSERT(currentStyle == renderStyle());
+
+ if (!renderer() || !currentStyle)
+ return false;
+
+ const PseudoStyleCache* pseudoStyleCache = currentStyle->cachedPseudoStyles();
+ if (!pseudoStyleCache)
+ return false;
+
+ size_t cacheSize = pseudoStyleCache->size();
+ for (size_t i = 0; i < cacheSize; ++i) {
+ RefPtr<RenderStyle> newPseudoStyle;
+ PseudoId pseudoId = pseudoStyleCache->at(i)->styleType();
+ if (pseudoId == VISITED_LINK) {
+ newPseudoStyle = newStyle->getCachedPseudoStyle(VISITED_LINK); // This pseudo-style was aggressively computed already when we first called styleForElement on the new style.
+ if (!newPseudoStyle || *newPseudoStyle != *pseudoStyleCache->at(i))
+ return true;
+ } else if (pseudoId == FIRST_LINE || pseudoId == FIRST_LINE_INHERITED)
+ newPseudoStyle = renderer()->uncachedFirstLineStyle(newStyle);
+ else
+ newPseudoStyle = renderer()->getUncachedPseudoStyle(pseudoId, newStyle, newStyle);
+ if (!newPseudoStyle)
+ return true;
+ if (*newPseudoStyle != *pseudoStyleCache->at(i)) {
+ if (pseudoId < FIRST_INTERNAL_PSEUDOID)
+ newStyle->setHasPseudoStyle(pseudoId);
+ newStyle->addCachedPseudoStyle(newPseudoStyle);
+ if (pseudoId == FIRST_LINE || pseudoId == FIRST_LINE_INHERITED) {
+ // FIXME: We should do an actual diff to determine whether a repaint vs. layout
+ // is needed, but for now just assume a layout will be required. The diff code
+ // in RenderObject::setStyle would need to be factored out so that it could be reused.
+ renderer()->setNeedsLayoutAndPrefWidthsRecalc();
+ }
+ return true;
+ }
+ }
+ return false;
+}
+
+void Element::recalcStyle(StyleChange change)
+{
+ // Ref currentStyle in case it would otherwise be deleted when setRenderStyle() is called.
+ RefPtr<RenderStyle> currentStyle(renderStyle());
+ bool hasParentStyle = parentNode() ? parentNode()->renderStyle() : false;
+ bool hasPositionalRules = needsStyleRecalc() && currentStyle && currentStyle->childrenAffectedByPositionalRules();
+ bool hasDirectAdjacentRules = currentStyle && currentStyle->childrenAffectedByDirectAdjacentRules();
+
+#if ENABLE(SVG)
+ if (!hasParentStyle && isShadowNode() && isSVGElement())
+ hasParentStyle = true;
+#endif
+
+ if ((change > NoChange || needsStyleRecalc())) {
+ if (hasRareData())
+ rareData()->resetComputedStyle();
+ }
+ if (hasParentStyle && (change >= Inherit || needsStyleRecalc())) {
+ RefPtr<RenderStyle> newStyle = document()->styleSelector()->styleForElement(this);
+ StyleChange ch = diff(currentStyle.get(), newStyle.get());
+ if (ch == Detach || !currentStyle) {
+ if (attached())
+ detach();
+ attach(); // FIXME: The style gets computed twice by calling attach. We could do better if we passed the style along.
+ // attach recalulates the style for all children. No need to do it twice.
+ setNeedsStyleRecalc(NoStyleChange);
+ clearChildNeedsStyleRecalc();
+ return;
+ }
+
+ if (currentStyle) {
+ // Preserve "affected by" bits that were propagated to us from descendants in the case where we didn't do a full
+ // style change (e.g., only inline style changed).
+ if (currentStyle->affectedByHoverRules())
+ newStyle->setAffectedByHoverRules(true);
+ if (currentStyle->affectedByActiveRules())
+ newStyle->setAffectedByActiveRules(true);
+ if (currentStyle->affectedByDragRules())
+ newStyle->setAffectedByDragRules(true);
+ if (currentStyle->childrenAffectedByForwardPositionalRules())
+ newStyle->setChildrenAffectedByForwardPositionalRules();
+ if (currentStyle->childrenAffectedByBackwardPositionalRules())
+ newStyle->setChildrenAffectedByBackwardPositionalRules();
+ if (currentStyle->childrenAffectedByFirstChildRules())
+ newStyle->setChildrenAffectedByFirstChildRules();
+ if (currentStyle->childrenAffectedByLastChildRules())
+ newStyle->setChildrenAffectedByLastChildRules();
+ if (currentStyle->childrenAffectedByDirectAdjacentRules())
+ newStyle->setChildrenAffectedByDirectAdjacentRules();
+ }
+
+ if (ch != NoChange || pseudoStyleCacheIsInvalid(currentStyle.get(), newStyle.get()) || (change == Force && renderer() && renderer()->requiresForcedStyleRecalcPropagation())) {
+ setRenderStyle(newStyle);
+ } else if (needsStyleRecalc() && (styleChangeType() != SyntheticStyleChange) && (document()->usesSiblingRules() || document()->usesDescendantRules())) {
+ // 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. This is only necessary if the document actually uses
+ // sibling/descendant rules, since otherwise it isn't possible for ancestor styles to affect sharing of
+ // descendants.
+ if (renderer())
+ renderer()->setStyleInternal(newStyle.get());
+ else
+ setRenderStyle(newStyle);
+ } else if (styleChangeType() == SyntheticStyleChange)
+ setRenderStyle(newStyle);
+
+ if (change != Force) {
+ // If "rem" units are used anywhere in the document, and if the document element's font size changes, then go ahead and force font updating
+ // all the way down the tree. This is simpler than having to maintain a cache of objects (and such font size changes should be rare anyway).
+ if (document()->usesRemUnits() && ch != NoChange && currentStyle && newStyle && currentStyle->fontSize() != newStyle->fontSize() && document()->documentElement() == this)
+ change = Force;
+ else if ((document()->usesDescendantRules() || hasPositionalRules) && styleChangeType() >= FullStyleChange)
+ change = Force;
+ else
+ change = ch;
+ }
+ }
+
+ // FIXME: This check is good enough for :hover + foo, but it is not good enough for :hover + foo + bar.
+ // For now we will just worry about the common case, since it's a lot trickier to get the second case right
+ // without doing way too much re-resolution.
+ bool forceCheckOfNextElementSibling = false;
+ for (Node *n = firstChild(); n; n = n->nextSibling()) {
+ bool childRulesChanged = n->needsStyleRecalc() && n->styleChangeType() == FullStyleChange;
+ if (forceCheckOfNextElementSibling && n->isElementNode())
+ n->setNeedsStyleRecalc();
+ if (change >= Inherit || n->isTextNode() || n->childNeedsStyleRecalc() || n->needsStyleRecalc())
+ n->recalcStyle(change);
+ if (n->isElementNode())
+ forceCheckOfNextElementSibling = childRulesChanged && hasDirectAdjacentRules;
+ }
+
+ setNeedsStyleRecalc(NoStyleChange);
+ clearChildNeedsStyleRecalc();
+}
+
+bool Element::childTypeAllowed(NodeType type)
+{
+ switch (type) {
+ case ELEMENT_NODE:
+ case TEXT_NODE:
+ case COMMENT_NODE:
+ case PROCESSING_INSTRUCTION_NODE:
+ case CDATA_SECTION_NODE:
+ case ENTITY_REFERENCE_NODE:
+ return true;
+ break;
+ default:
+ return false;
+ }
+}
+
+static void checkForSiblingStyleChanges(Element* e, RenderStyle* style, bool finishedParsingCallback,
+ Node* beforeChange, Node* afterChange, int childCountDelta)
+{
+ if (!style || (e->needsStyleRecalc() && style->childrenAffectedByPositionalRules()))
+ return;
+
+ // :first-child. In the parser callback case, we don't have to check anything, since we were right the first time.
+ // In the DOM case, we only need to do something if |afterChange| is not 0.
+ // |afterChange| is 0 in the parser case, so it works out that we'll skip this block.
+ if (style->childrenAffectedByFirstChildRules() && afterChange) {
+ // Find our new first child.
+ Node* newFirstChild = 0;
+ for (newFirstChild = e->firstChild(); newFirstChild && !newFirstChild->isElementNode(); newFirstChild = newFirstChild->nextSibling()) {};
+
+ // Find the first element node following |afterChange|
+ Node* firstElementAfterInsertion = 0;
+ for (firstElementAfterInsertion = afterChange;
+ firstElementAfterInsertion && !firstElementAfterInsertion->isElementNode();
+ firstElementAfterInsertion = firstElementAfterInsertion->nextSibling()) {};
+
+ // This is the insert/append case.
+ if (newFirstChild != firstElementAfterInsertion && firstElementAfterInsertion && firstElementAfterInsertion->attached() &&
+ firstElementAfterInsertion->renderStyle() && firstElementAfterInsertion->renderStyle()->firstChildState())
+ firstElementAfterInsertion->setNeedsStyleRecalc();
+
+ // We also have to handle node removal.
+ if (childCountDelta < 0 && newFirstChild == firstElementAfterInsertion && newFirstChild && newFirstChild->renderStyle() && !newFirstChild->renderStyle()->firstChildState())
+ newFirstChild->setNeedsStyleRecalc();
+ }
+
+ // :last-child. In the parser callback case, we don't have to check anything, since we were right the first time.
+ // In the DOM case, we only need to do something if |afterChange| is not 0.
+ if (style->childrenAffectedByLastChildRules() && beforeChange) {
+ // Find our new last child.
+ Node* newLastChild = 0;
+ for (newLastChild = e->lastChild(); newLastChild && !newLastChild->isElementNode(); newLastChild = newLastChild->previousSibling()) {};
+
+ // Find the last element node going backwards from |beforeChange|
+ Node* lastElementBeforeInsertion = 0;
+ for (lastElementBeforeInsertion = beforeChange;
+ lastElementBeforeInsertion && !lastElementBeforeInsertion->isElementNode();
+ lastElementBeforeInsertion = lastElementBeforeInsertion->previousSibling()) {};
+
+ if (newLastChild != lastElementBeforeInsertion && lastElementBeforeInsertion && lastElementBeforeInsertion->attached() &&
+ lastElementBeforeInsertion->renderStyle() && lastElementBeforeInsertion->renderStyle()->lastChildState())
+ lastElementBeforeInsertion->setNeedsStyleRecalc();
+
+ // We also have to handle node removal. The parser callback case is similar to node removal as well in that we need to change the last child
+ // to match now.
+ if ((childCountDelta < 0 || finishedParsingCallback) && newLastChild == lastElementBeforeInsertion && newLastChild && newLastChild->renderStyle() && !newLastChild->renderStyle()->lastChildState())
+ newLastChild->setNeedsStyleRecalc();
+ }
+
+ // The + selector. We need to invalidate the first element following the insertion point. It is the only possible element
+ // that could be affected by this DOM change.
+ if (style->childrenAffectedByDirectAdjacentRules() && afterChange) {
+ Node* firstElementAfterInsertion = 0;
+ for (firstElementAfterInsertion = afterChange;
+ firstElementAfterInsertion && !firstElementAfterInsertion->isElementNode();
+ firstElementAfterInsertion = firstElementAfterInsertion->nextSibling()) {};
+ if (firstElementAfterInsertion && firstElementAfterInsertion->attached())
+ firstElementAfterInsertion->setNeedsStyleRecalc();
+ }
+
+ // Forward positional selectors include the ~ selector, nth-child, nth-of-type, first-of-type and only-of-type.
+ // Backward positional selectors include nth-last-child, nth-last-of-type, last-of-type and only-of-type.
+ // We have to invalidate everything following the insertion point in the forward case, and everything before the insertion point in the
+ // backward case.
+ // |afterChange| is 0 in the parser callback case, so we won't do any work for the forward case if we don't have to.
+ // For performance reasons we just mark the parent node as changed, since we don't want to make childrenChanged O(n^2) by crawling all our kids
+ // here. recalcStyle will then force a walk of the children when it sees that this has happened.
+ if ((style->childrenAffectedByForwardPositionalRules() && afterChange) ||
+ (style->childrenAffectedByBackwardPositionalRules() && beforeChange))
+ e->setNeedsStyleRecalc();
+
+ // :empty selector.
+ if (style->affectedByEmpty() && (!style->emptyState() || e->hasChildNodes()))
+ e->setNeedsStyleRecalc();
+}
+
+void Element::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
+{
+ ContainerNode::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
+ if (!changedByParser)
+ checkForSiblingStyleChanges(this, renderStyle(), false, beforeChange, afterChange, childCountDelta);
+}
+
+void Element::finishParsingChildren()
+{
+ ContainerNode::finishParsingChildren();
+ setIsParsingChildrenFinished();
+ checkForSiblingStyleChanges(this, renderStyle(), true, lastChild(), 0, 0);
+}
+
+void Element::dispatchAttrRemovalEvent(Attribute*)
+{
+ ASSERT(!eventDispatchForbidden());
+
+#if 0
+ if (!document()->hasListenerType(Document::DOMATTRMODIFIED_LISTENER))
+ return;
+ ExceptionCode ec = 0;
+ dispatchEvent(MutationEvent::create(DOMAttrModifiedEvent, true, attr, attr->value(),
+ attr->value(), document()->attrName(attr->id()), MutationEvent::REMOVAL), ec);
+#endif
+}
+
+void Element::dispatchAttrAdditionEvent(Attribute*)
+{
+ ASSERT(!eventDispatchForbidden());
+
+#if 0
+ if (!document()->hasListenerType(Document::DOMATTRMODIFIED_LISTENER))
+ return;
+ ExceptionCode ec = 0;
+ dispatchEvent(MutationEvent::create(DOMAttrModifiedEvent, true, attr, attr->value(),
+ attr->value(), document()->attrName(attr->id()), MutationEvent::ADDITION), ec);
+#endif
+}
+
+String Element::openTagStartToString() const
+{
+ String result = "<" + nodeName();
+
+ NamedNodeMap* attrMap = attributes(true);
+
+ if (attrMap) {
+ unsigned numAttrs = attrMap->length();
+ for (unsigned i = 0; i < numAttrs; i++) {
+ result += " ";
+
+ Attribute *attribute = attrMap->attributeItem(i);
+ result += attribute->name().toString();
+ if (!attribute->value().isNull()) {
+ result += "=\"";
+ // FIXME: substitute entities for any instances of " or '
+ result += attribute->value();
+ result += "\"";
+ }
+ }
+ }
+
+ return result;
+}
+
+#ifndef NDEBUG
+void Element::formatForDebugger(char* buffer, unsigned length) const
+{
+ String result;
+ String s;
+
+ s = nodeName();
+ if (s.length() > 0) {
+ result += s;
+ }
+
+ s = getIdAttribute();
+ if (s.length() > 0) {
+ if (result.length() > 0)
+ result += "; ";
+ result += "id=";
+ result += s;
+ }
+
+ s = getAttribute(classAttr);
+ if (s.length() > 0) {
+ if (result.length() > 0)
+ result += "; ";
+ result += "class=";
+ result += s;
+ }
+
+ strncpy(buffer, result.utf8().data(), length - 1);
+}
+#endif
+
+PassRefPtr<Attr> Element::setAttributeNode(Attr* attr, ExceptionCode& ec)
+{
+ if (!attr) {
+ ec = TYPE_MISMATCH_ERR;
+ return 0;
+ }
+ return static_pointer_cast<Attr>(attributes(false)->setNamedItem(attr, ec));
+}
+
+PassRefPtr<Attr> Element::setAttributeNodeNS(Attr* attr, ExceptionCode& ec)
+{
+ if (!attr) {
+ ec = TYPE_MISMATCH_ERR;
+ return 0;
+ }
+ return static_pointer_cast<Attr>(attributes(false)->setNamedItem(attr, ec));
+}
+
+PassRefPtr<Attr> Element::removeAttributeNode(Attr* attr, ExceptionCode& ec)
+{
+ if (!attr) {
+ ec = TYPE_MISMATCH_ERR;
+ return 0;
+ }
+ if (attr->ownerElement() != this) {
+ ec = NOT_FOUND_ERR;
+ return 0;
+ }
+ if (document() != attr->document()) {
+ ec = WRONG_DOCUMENT_ERR;
+ return 0;
+ }
+
+ NamedNodeMap* attrs = attributes(true);
+ if (!attrs)
+ return 0;
+
+ return static_pointer_cast<Attr>(attrs->removeNamedItem(attr->qualifiedName(), ec));
+}
+
+void Element::setAttributeNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, const AtomicString& value, ExceptionCode& ec, FragmentScriptingPermission scriptingPermission)
+{
+ String prefix, localName;
+ if (!Document::parseQualifiedName(qualifiedName, prefix, localName, ec))
+ return;
+
+ QualifiedName qName(prefix, localName, namespaceURI);
+
+ if (scriptingPermission == FragmentScriptingNotAllowed && (isEventHandlerAttribute(qName) || isAttributeToRemove(qName, value)))
+ return;
+
+ setAttribute(qName, value, ec);
+}
+
+void Element::removeAttribute(const String& name, ExceptionCode& ec)
+{
+ String localName = shouldIgnoreAttributeCase(this) ? name.lower() : name;
+
+ if (m_attributeMap) {
+ m_attributeMap->removeNamedItem(localName, ec);
+ if (ec == NOT_FOUND_ERR)
+ ec = 0;
+ }
+
+#if ENABLE(INSPECTOR)
+ if (Page* page = document()->page()) {
+ if (InspectorController* inspectorController = page->inspectorController())
+ inspectorController->didModifyDOMAttr(this);
+ }
+#endif
+
+}
+
+void Element::removeAttributeNS(const String& namespaceURI, const String& localName, ExceptionCode& ec)
+{
+ removeAttribute(QualifiedName(nullAtom, localName, namespaceURI), ec);
+}
+
+PassRefPtr<Attr> Element::getAttributeNode(const String& name)
+{
+ NamedNodeMap* attrs = attributes(true);
+ if (!attrs)
+ return 0;
+ String localName = shouldIgnoreAttributeCase(this) ? name.lower() : name;
+ return static_pointer_cast<Attr>(attrs->getNamedItem(localName));
+}
+
+PassRefPtr<Attr> Element::getAttributeNodeNS(const String& namespaceURI, const String& localName)
+{
+ NamedNodeMap* attrs = attributes(true);
+ if (!attrs)
+ return 0;
+ return static_pointer_cast<Attr>(attrs->getNamedItem(QualifiedName(nullAtom, localName, namespaceURI)));
+}
+
+bool Element::hasAttribute(const String& name) const
+{
+ NamedNodeMap* attrs = attributes(true);
+ if (!attrs)
+ return false;
+
+ // This call to String::lower() seems to be required but
+ // there may be a way to remove it.
+ String localName = shouldIgnoreAttributeCase(this) ? name.lower() : name;
+ return attrs->getAttributeItem(localName, false);
+}
+
+bool Element::hasAttributeNS(const String& namespaceURI, const String& localName) const
+{
+ NamedNodeMap* attrs = attributes(true);
+ if (!attrs)
+ return false;
+ return attrs->getAttributeItem(QualifiedName(nullAtom, localName, namespaceURI));
+}
+
+CSSStyleDeclaration *Element::style()
+{
+ return 0;
+}
+
+void Element::focus(bool restorePreviousSelection)
+{
+ Document* doc = document();
+ if (doc->focusedNode() == this)
+ return;
+
+ if (!supportsFocus())
+ 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;
+ }
+
+ RefPtr<Node> protect;
+ if (Page* page = doc->page()) {
+ // Focus and change event handlers can cause us to lose our last ref.
+ protect = this;
+ page->focusController()->setFocusedNode(this, doc->frame());
+ }
+
+ // Setting the focused node above might have invalidated the layout due to scripts.
+ doc->updateLayoutIgnorePendingStylesheets();
+
+ if (!isFocusable()) {
+ ensureRareData()->setNeedsFocusAppearanceUpdateSoonAfterAttach(true);
+ return;
+ }
+
+ cancelFocusAppearanceUpdate();
+ updateFocusAppearance(restorePreviousSelection);
+}
+
+void Element::updateFocusAppearance(bool /*restorePreviousSelection*/)
+{
+ if (this == rootEditableElement()) {
+ Frame* frame = document()->frame();
+ if (!frame)
+ return;
+
+ // FIXME: We should restore the previous selection if there is one.
+ VisibleSelection newSelection = hasTagName(htmlTag) || hasTagName(bodyTag) ? VisibleSelection(Position(this, 0), DOWNSTREAM) : VisibleSelection::selectionFromContentsOfNode(this);
+
+ if (frame->shouldChangeSelection(newSelection)) {
+ frame->selection()->setSelection(newSelection);
+ frame->revealSelection();
+ }
+ } else if (renderer() && !renderer()->isWidget())
+ renderer()->enclosingLayer()->scrollRectToVisible(getRect());
+}
+
+void Element::blur()
+{
+ cancelFocusAppearanceUpdate();
+ Document* doc = document();
+ if (doc->focusedNode() == this) {
+ if (doc->frame())
+ doc->frame()->page()->focusController()->setFocusedNode(0, doc->frame());
+ else
+ doc->setFocusedNode(0);
+ }
+}
+
+String Element::innerText() const
+{
+ // 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() const
+{
+ // Getting outerText is the same as getting innerText, only
+ // setting is different. You would think this should get the plain
+ // text for the outer range, but this is wrong, <br> for instance
+ // would return different values for inner and outer text by such
+ // a rule, but it doesn't in WinIE, and we want to match that.
+ return innerText();
+}
+
+String Element::title() const
+{
+ return String();
+}
+
+IntSize Element::minimumSizeForResizing() const
+{
+ return hasRareData() ? rareData()->m_minimumSizeForResizing : defaultMinimumSizeForResizing();
+}
+
+void Element::setMinimumSizeForResizing(const IntSize& size)
+{
+ if (size == defaultMinimumSizeForResizing() && !hasRareData())
+ return;
+ ensureRareData()->m_minimumSizeForResizing = size;
+}
+
+RenderStyle* Element::computedStyle(PseudoId pseudoElementSpecifier)
+{
+ // FIXME: Find and use the renderer from the pseudo element instead of the actual element so that the 'length'
+ // properties, which are only known by the renderer because it did the layout, will be correct and so that the
+ // values returned for the ":selection" pseudo-element will be correct.
+ if (RenderStyle* usedStyle = renderStyle())
+ return pseudoElementSpecifier ? usedStyle->getCachedPseudoStyle(pseudoElementSpecifier) : usedStyle;
+
+ if (!attached())
+ // FIXME: Try to do better than this. Ensure that styleForElement() works for elements that are not in the
+ // document tree and figure out when to destroy the computed style for such elements.
+ return 0;
+
+ ElementRareData* data = ensureRareData();
+ if (!data->m_computedStyle)
+ data->m_computedStyle = document()->styleForElementIgnoringPendingStylesheets(this);
+ return pseudoElementSpecifier ? data->m_computedStyle->getCachedPseudoStyle(pseudoElementSpecifier) : data->m_computedStyle.get();
+}
+
+void Element::cancelFocusAppearanceUpdate()
+{
+ if (hasRareData())
+ rareData()->setNeedsFocusAppearanceUpdateSoonAfterAttach(false);
+ if (document()->focusedNode() == this)
+ document()->cancelFocusAppearanceUpdate();
+}
+
+void Element::normalizeAttributes()
+{
+ // Normalize attributes.
+ NamedNodeMap* attrs = attributes(true);
+ if (!attrs)
+ return;
+
+ if (attrs->isEmpty())
+ return;
+
+ Vector<RefPtr<Attribute> > attributeVector;
+ attrs->copyAttributesToVector(attributeVector);
+ size_t numAttrs = attributeVector.size();
+ for (size_t i = 0; i < numAttrs; ++i) {
+ if (Attr* attr = attributeVector[i]->attr())
+ attr->normalize();
+ }
+}
+
+// ElementTraversal API
+Element* Element::firstElementChild() const
+{
+ Node* n = firstChild();
+ while (n && !n->isElementNode())
+ n = n->nextSibling();
+ return static_cast<Element*>(n);
+}
+
+Element* Element::lastElementChild() const
+{
+ Node* n = lastChild();
+ while (n && !n->isElementNode())
+ n = n->previousSibling();
+ return static_cast<Element*>(n);
+}
+
+Element* Element::previousElementSibling() const
+{
+ Node* n = previousSibling();
+ while (n && !n->isElementNode())
+ n = n->previousSibling();
+ return static_cast<Element*>(n);
+}
+
+Element* Element::nextElementSibling() const
+{
+ Node* n = nextSibling();
+ while (n && !n->isElementNode())
+ n = n->nextSibling();
+ return static_cast<Element*>(n);
+}
+
+unsigned Element::childElementCount() const
+{
+ unsigned count = 0;
+ Node* n = firstChild();
+ while (n) {
+ count += n->isElementNode();
+ n = n->nextSibling();
+ }
+ return count;
+}
+
+bool Element::webkitMatchesSelector(const String& selector, ExceptionCode& ec)
+{
+ if (selector.isEmpty()) {
+ ec = SYNTAX_ERR;
+ return false;
+ }
+
+ bool strictParsing = !document()->inCompatMode();
+ CSSParser p(strictParsing);
+
+ CSSSelectorList selectorList;
+ p.parseSelector(selector, document(), selectorList);
+
+ if (!selectorList.first()) {
+ ec = SYNTAX_ERR;
+ return false;
+ }
+
+ // Throw a NAMESPACE_ERR if the selector includes any namespace prefixes.
+ if (selectorList.selectorsNeedNamespaceResolution()) {
+ ec = NAMESPACE_ERR;
+ return false;
+ }
+
+ CSSStyleSelector::SelectorChecker selectorChecker(document(), strictParsing);
+ for (CSSSelector* selector = selectorList.first(); selector; selector = CSSSelectorList::next(selector)) {
+ if (selectorChecker.checkSelector(selector, this))
+ return true;
+ }
+
+ return false;
+}
+
+DOMStringMap* Element::dataset()
+{
+ ElementRareData* data = ensureRareData();
+ if (!data->m_datasetDOMStringMap)
+ data->m_datasetDOMStringMap = DatasetDOMStringMap::create(this);
+ return data->m_datasetDOMStringMap.get();
+}
+
+KURL Element::getURLAttribute(const QualifiedName& name) const
+{
+#if !ASSERT_DISABLED
+ if (m_attributeMap) {
+ if (Attribute* attribute = m_attributeMap->getAttributeItem(name))
+ ASSERT(isURLAttribute(attribute));
+ }
+#endif
+ return document()->completeURL(deprecatedParseURL(getAttribute(name)));
+}
+
+KURL Element::getNonEmptyURLAttribute(const QualifiedName& name) const
+{
+#if !ASSERT_DISABLED
+ if (m_attributeMap) {
+ if (Attribute* attribute = m_attributeMap->getAttributeItem(name))
+ ASSERT(isURLAttribute(attribute));
+ }
+#endif
+ String value = deprecatedParseURL(getAttribute(name));
+ if (value.isEmpty())
+ return KURL();
+ return document()->completeURL(value);
+}
+
+int Element::getIntegralAttribute(const QualifiedName& attributeName) const
+{
+ return getAttribute(attributeName).string().toInt();
+}
+
+void Element::setIntegralAttribute(const QualifiedName& attributeName, int value)
+{
+ // FIXME: Need an AtomicString version of String::number.
+ ExceptionCode ec;
+ setAttribute(attributeName, String::number(value), ec);
+}
+
+unsigned Element::getUnsignedIntegralAttribute(const QualifiedName& attributeName) const
+{
+ return getAttribute(attributeName).string().toUInt();
+}
+
+void Element::setUnsignedIntegralAttribute(const QualifiedName& attributeName, unsigned value)
+{
+ // FIXME: Need an AtomicString version of String::number.
+ ExceptionCode ec;
+ setAttribute(attributeName, String::number(value), ec);
+}
+
+#if ENABLE(SVG)
+bool Element::childShouldCreateRenderer(Node* child) const
+{
+ // Only create renderers for SVG elements whose parents are SVG elements, or for proper <svg xmlns="svgNS"> subdocuments.
+ if (child->isSVGElement())
+ return child->hasTagName(SVGNames::svgTag) || isSVGElement();
+
+ return Node::childShouldCreateRenderer(child);
+}
+#endif
+
+} // namespace WebCore