auto import from //depot/cupcake/@135843

1 files changed, 4493 insertions, 0 deletions

diff --git a/WebCore/dom/Document.cpp b/WebCore/dom/Document.cpp
new file mode 100644
index 0000000..f5a72c2
--- /dev/null
+++ b/WebCore/dom/Document.cpp
@@ -0,0 +1,4493 @@
+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ *           (C) 1999 Antti Koivisto (koivisto@kde.org)
+ *           (C) 2001 Dirk Mueller (mueller@kde.org)
+ *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
+ * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ *
+ * 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 "Document.h"
+
+#include "AnimationController.h"
+#include "AXObjectCache.h"
+#include "CDATASection.h"
+#include "CSSHelper.h"
+#include "CSSStyleSelector.h"
+#include "CSSStyleSheet.h"
+#include "CSSValueKeywords.h"
+#include "CString.h"
+#include "CachedCSSStyleSheet.h"
+#include "Comment.h"
+#include "CookieJar.h"
+#include "DOMImplementation.h"
+#include "DOMWindow.h"
+#include "DocLoader.h"
+#include "DocumentFragment.h"
+#include "DocumentLoader.h"
+#include "DocumentType.h"
+#include "EditingText.h"
+#include "Editor.h"
+#include "EntityReference.h"
+#include "Event.h"
+#include "EventHandler.h"
+#include "EventListener.h"
+#include "EventNames.h"
+#include "ExceptionCode.h"
+#include "FocusController.h"
+#include "Frame.h"
+#include "FrameLoader.h"
+#include "FrameTree.h"
+#include "FrameView.h"
+#include "HTMLBodyElement.h"
+#include "HTMLCanvasElement.h"
+#include "HTMLDocument.h"
+#include "HTMLElementFactory.h"
+#include "HTMLFrameOwnerElement.h"
+#include "HTMLHeadElement.h"
+#include "HTMLInputElement.h"
+#include "HTMLLinkElement.h"
+#include "HTMLMapElement.h"
+#include "HTMLNameCollection.h"
+#include "HTMLNames.h"
+#include "HTMLStyleElement.h"
+#include "HTMLTitleElement.h"
+#include "HTTPParsers.h"
+#include "HistoryItem.h"
+#include "HitTestRequest.h"
+#include "HitTestResult.h"
+#include "ImageLoader.h"
+#include "KeyboardEvent.h"
+#include "Logging.h"
+#include "MessageEvent.h"
+#include "MouseEvent.h"
+#include "MouseEventWithHitTestResults.h"
+#include "MutationEvent.h"
+#include "NameNodeList.h"
+#include "NodeFilter.h"
+#include "NodeIterator.h"
+#include "NodeWithIndex.h"
+#include "OverflowEvent.h"
+#include "Page.h"
+#include "PlatformKeyboardEvent.h"
+#include "ProcessingInstruction.h"
+#include "ProgressEvent.h"
+#include "RegisteredEventListener.h"
+#include "RegularExpression.h"
+#include "RenderArena.h"
+#include "RenderView.h"
+#include "RenderWidget.h"
+#include "SecurityOrigin.h"
+#include "SegmentedString.h"
+#include "SelectionController.h"
+#include "Settings.h"
+#include "StringHash.h"
+#include "StyleSheetList.h"
+#include "SystemTime.h"
+#include "TextEvent.h"
+#include "TextIterator.h"
+#include "TextResourceDecoder.h"
+#include "TreeWalker.h"
+#include "UIEvent.h"
+#include "WebKitAnimationEvent.h"
+#include "WebKitTransitionEvent.h"
+#include "WheelEvent.h"
+#include "XMLHttpRequest.h"
+#include "XMLNames.h"
+#include "XMLTokenizer.h"
+#include "JSDOMBinding.h"
+#include "ScriptController.h"
+#include <runtime/JSLock.h>
+
+#if ENABLE(DATABASE)
+#include "Database.h"
+#include "DatabaseThread.h"
+#endif
+
+#if ENABLE(XPATH)
+#include "XPathEvaluator.h"
+#include "XPathExpression.h"
+#include "XPathNSResolver.h"
+#include "XPathResult.h"
+#endif
+
+#if ENABLE(XSLT)
+#include "XSLTProcessor.h"
+#endif
+
+#if ENABLE(XBL)
+#include "XBLBindingManager.h"
+#endif
+
+#if ENABLE(SVG)
+#include "SVGDocumentExtensions.h"
+#include "SVGElementFactory.h"
+#include "SVGZoomEvent.h"
+#include "SVGStyleElement.h"
+#endif
+
+#if ENABLE(TOUCH_EVENTS) // Android
+#include "TouchEvent.h"
+#if PLATFORM(ANDROID)
+#include "WebViewCore.h"
+#endif
+#endif
+
+#ifdef ANDROID_META_SUPPORT
+#include "Settings.h"
+#endif
+
+#ifdef ANDROID_RESET_SELECTION
+#include "CacheBuilder.h"
+#include "HTMLTextAreaElement.h"
+#endif
+
+#ifdef ANDROID_INSTRUMENT
+#include "TimeCounter.h"
+#endif
+
+using namespace std;
+using namespace WTF;
+using namespace Unicode;
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+// #define INSTRUMENT_LAYOUT_SCHEDULING 1
+
+// This amount of time must have elapsed before we will even consider scheduling a layout without a delay.
+// FIXME: For faster machines this value can really be lowered to 200.  250 is adequate, but a little high
+// for dual G5s. :)
+static const int cLayoutScheduleThreshold = 250;
+
+// Use 1 to represent the document's default form.
+static HTMLFormElement* const defaultForm = reinterpret_cast<HTMLFormElement*>(1);
+
+// Golden ratio - arbitrary start value to avoid mapping all 0's to all 0's
+static const unsigned PHI = 0x9e3779b9U;
+
+// DOM Level 2 says (letters added):
+//
+// a) Name start characters must have one of the categories Ll, Lu, Lo, Lt, Nl.
+// b) Name characters other than Name-start characters must have one of the categories Mc, Me, Mn, Lm, or Nd.
+// c) Characters in the compatibility area (i.e. with character code greater than #xF900 and less than #xFFFE) are not allowed in XML names.
+// d) Characters which have a font or compatibility decomposition (i.e. those with a "compatibility formatting tag" in field 5 of the database -- marked by field 5 beginning with a "<") are not allowed.
+// e) The following characters are treated as name-start characters rather than name characters, because the property file classifies them as Alphabetic: [#x02BB-#x02C1], #x0559, #x06E5, #x06E6.
+// f) Characters #x20DD-#x20E0 are excluded (in accordance with Unicode, section 5.14).
+// g) Character #x00B7 is classified as an extender, because the property list so identifies it.
+// h) Character #x0387 is added as a name character, because #x00B7 is its canonical equivalent.
+// i) Characters ':' and '_' are allowed as name-start characters.
+// j) Characters '-' and '.' are allowed as name characters.
+//
+// It also contains complete tables. If we decide it's better, we could include those instead of the following code.
+
+static inline bool isValidNameStart(UChar32 c)
+{
+    // rule (e) above
+    if ((c >= 0x02BB && c <= 0x02C1) || c == 0x559 || c == 0x6E5 || c == 0x6E6)
+        return true;
+
+    // rule (i) above
+    if (c == ':' || c == '_')
+        return true;
+
+    // rules (a) and (f) above
+    const uint32_t nameStartMask = Letter_Lowercase | Letter_Uppercase | Letter_Other | Letter_Titlecase | Number_Letter;
+    if (!(Unicode::category(c) & nameStartMask))
+        return false;
+
+    // rule (c) above
+    if (c >= 0xF900 && c < 0xFFFE)
+        return false;
+
+    // rule (d) above
+    DecompositionType decompType = decompositionType(c);
+    if (decompType == DecompositionFont || decompType == DecompositionCompat)
+        return false;
+
+    return true;
+}
+
+static inline bool isValidNamePart(UChar32 c)
+{
+    // rules (a), (e), and (i) above
+    if (isValidNameStart(c))
+        return true;
+
+    // rules (g) and (h) above
+    if (c == 0x00B7 || c == 0x0387)
+        return true;
+
+    // rule (j) above
+    if (c == '-' || c == '.')
+        return true;
+
+    // rules (b) and (f) above
+    const uint32_t otherNamePartMask = Mark_NonSpacing | Mark_Enclosing | Mark_SpacingCombining | Letter_Modifier | Number_DecimalDigit;
+    if (!(Unicode::category(c) & otherNamePartMask))
+        return false;
+
+    // rule (c) above
+    if (c >= 0xF900 && c < 0xFFFE)
+        return false;
+
+    // rule (d) above
+    DecompositionType decompType = decompositionType(c);
+    if (decompType == DecompositionFont || decompType == DecompositionCompat)
+        return false;
+
+    return true;
+}
+
+static Widget* widgetForNode(Node* focusedNode)
+{
+    if (!focusedNode)
+        return 0;
+    RenderObject* renderer = focusedNode->renderer();
+    if (!renderer || !renderer->isWidget())
+        return 0;
+    return static_cast<RenderWidget*>(renderer)->widget();
+}
+
+static bool acceptsEditingFocus(Node *node)
+{
+    ASSERT(node);
+    ASSERT(node->isContentEditable());
+
+    Node *root = node->rootEditableElement();
+    Frame* frame = node->document()->frame();
+    if (!frame || !root)
+        return false;
+
+    return frame->editor()->shouldBeginEditing(rangeOfContents(root).get());
+}
+
+static HashSet<Document*>* changedDocuments = 0;
+
+Document::Document(Frame* frame, bool isXHTML)
+    : ContainerNode(0)
+    , m_domtree_version(0)
+    , m_styleSheets(StyleSheetList::create(this))
+    , m_title("")
+    , m_titleSetExplicitly(false)
+    , m_imageLoadEventTimer(this, &Document::imageLoadEventTimerFired)
+    , m_updateFocusAppearanceTimer(this, &Document::updateFocusAppearanceTimerFired)
+#if ENABLE(XSLT)
+    , m_transformSource(0)
+#endif
+    , m_xmlVersion("1.0")
+    , m_xmlStandalone(false)
+#if ENABLE(XBL)
+    , m_bindingManager(new XBLBindingManager(this))
+#endif
+    , m_savedRenderer(0)
+    , m_secureForms(0)
+    , m_designMode(inherit)
+    , m_selfOnlyRefCount(0)
+#if ENABLE(SVG)
+    , m_svgExtensions(0)
+#endif
+#if ENABLE(DASHBOARD_SUPPORT)
+    , m_hasDashboardRegions(false)
+    , m_dashboardRegionsDirty(false)
+#endif
+    , m_accessKeyMapValid(false)
+    , m_createRenderers(true)
+    , m_inPageCache(false)
+    , m_useSecureKeyboardEntryWhenActive(false)
+    , m_isXHTML(isXHTML)
+    , m_numNodeListCaches(0)
+#if ENABLE(DATABASE)
+    , m_hasOpenDatabases(false)
+#endif
+    , m_usingGeolocation(false)
+#if USE(LOW_BANDWIDTH_DISPLAY)
+    , m_inLowBandwidthDisplay(false)
+#endif
+#ifdef ANDROID_MOBILE
+    , mExtraLayoutDelay(0)
+#endif
+{
+    m_document.resetSkippingRef(this);
+
+    m_printing = false;
+    
+    m_ignoreAutofocus = false;
+
+    m_frame = frame;
+    m_renderArena = 0;
+
+    m_axObjectCache = 0;
+    
+    m_docLoader = new DocLoader(this);
+
+    visuallyOrdered = false;
+    m_bParsing = false;
+    m_docChanged = false;
+    m_tokenizer = 0;
+    m_wellFormed = false;
+
+    setParseMode(Strict);
+
+    m_textColor = Color::black;
+    m_listenerTypes = 0;
+    m_inDocument = true;
+    m_inStyleRecalc = false;
+    m_closeAfterStyleRecalc = false;
+    m_usesDescendantRules = false;
+    m_usesSiblingRules = false;
+    m_usesFirstLineRules = false;
+    m_usesFirstLetterRules = false;
+    m_gotoAnchorNeededAfterStylesheetsLoad = false;
+ 
+    m_styleSelector = 0;
+    m_didCalculateStyleSelector = false;
+    m_pendingStylesheets = 0;
+    m_ignorePendingStylesheets = false;
+    m_hasNodesWithPlaceholderStyle = false;
+    m_pendingSheetLayout = NoLayoutWithPendingSheets;
+
+    m_cssTarget = 0;
+
+    resetLinkColor();
+    resetVisitedLinkColor();
+    resetActiveLinkColor();
+
+    m_processingLoadEvent = false;
+    m_startTime = currentTime();
+    m_overMinimumLayoutThreshold = false;
+    
+    initSecurityContext();
+    initDNSPrefetch();
+
+    static int docID = 0;
+    m_docID = docID++;
+}
+
+void Document::removedLastRef()
+{
+    ASSERT(!m_deletionHasBegun);
+    if (m_selfOnlyRefCount) {
+        // If removing a child removes the last self-only ref, we don't
+        // want the document to be destructed until after
+        // removeAllChildren returns, so we guard ourselves with an
+        // extra self-only ref.
+
+        DocPtr<Document> guard(this);
+
+        // We must make sure not to be retaining any of our children through
+        // these extra pointers or we will create a reference cycle.
+        m_docType = 0;
+        m_focusedNode = 0;
+        m_hoverNode = 0;
+        m_activeNode = 0;
+        m_titleElement = 0;
+        m_documentElement = 0;
+
+        removeAllChildren();
+
+        deleteAllValues(m_markers);
+        m_markers.clear();
+
+        delete m_tokenizer;
+        m_tokenizer = 0;
+
+        m_cssCanvasElements.clear();
+
+#ifndef NDEBUG
+        m_inRemovedLastRefFunction = false;
+#endif
+    } else {
+#ifndef NDEBUG
+        m_deletionHasBegun = true;
+#endif
+        delete this;
+    }
+}
+
+Document::~Document()
+{
+    ASSERT(!renderer());
+    ASSERT(!m_inPageCache);
+    ASSERT(!m_savedRenderer);
+    ASSERT(m_ranges.isEmpty());
+
+    removeAllEventListeners();
+
+    forgetAllDOMNodesForDocument(this);
+
+    if (m_docChanged && changedDocuments)
+        changedDocuments->remove(this);
+    delete m_tokenizer;
+    m_document.resetSkippingRef(0);
+    delete m_styleSelector;
+    delete m_docLoader;
+    
+    if (m_renderArena) {
+        delete m_renderArena;
+        m_renderArena = 0;
+    }
+
+#if ENABLE(XSLT)
+    xmlFreeDoc((xmlDocPtr)m_transformSource);
+#endif
+
+#if ENABLE(XBL)
+    delete m_bindingManager;
+#endif
+
+    deleteAllValues(m_markers);
+
+    clearAXObjectCache();
+
+    m_decoder = 0;
+    
+    unsigned count = sizeof(m_nameCollectionInfo) / sizeof(m_nameCollectionInfo[0]);
+    for (unsigned i = 0; i < count; i++)
+        deleteAllValues(m_nameCollectionInfo[i]);
+
+#if ENABLE(DATABASE)
+    if (m_databaseThread) {
+        ASSERT(m_databaseThread->terminationRequested());
+        m_databaseThread = 0;
+    }
+#endif
+
+    if (m_styleSheets)
+        m_styleSheets->documentDestroyed();
+
+    m_document = 0;
+}
+
+void Document::resetLinkColor()
+{
+    m_linkColor = Color(0, 0, 238);
+}
+
+void Document::resetVisitedLinkColor()
+{
+    m_visitedLinkColor = Color(85, 26, 139);    
+}
+
+void Document::resetActiveLinkColor()
+{
+    m_activeLinkColor.setNamedColor("red");
+}
+
+void Document::setDocType(PassRefPtr<DocumentType> docType)
+{
+    // This should never be called more than once.
+    // Note: This is not a public DOM method and can only be called by the parser.
+    ASSERT(!m_docType || !docType);
+    if (m_docType && docType)
+        return;
+    m_docType = docType;
+    if (m_docType)
+        m_docType->setDocument(this);
+    determineParseMode();
+}
+
+DOMImplementation* Document::implementation() const
+{
+    if (!m_implementation)
+        m_implementation = DOMImplementation::create();
+    return m_implementation.get();
+}
+
+void Document::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
+{
+    ContainerNode::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
+    
+    // Invalidate the document element we have cached in case it was replaced.
+    m_documentElement = 0;
+}
+
+Element* Document::documentElement() const
+{
+    if (!m_documentElement) {
+        Node* n = firstChild();
+        while (n && !n->isElementNode())
+            n = n->nextSibling();
+        m_documentElement = static_cast<Element*>(n);
+    }
+
+    return m_documentElement.get();
+}
+
+PassRefPtr<Element> Document::createElement(const AtomicString& name, ExceptionCode& ec)
+{
+    if (!isValidName(name)) {
+        ec = INVALID_CHARACTER_ERR;
+        return 0;
+    }
+
+    if (m_isXHTML)
+        return HTMLElementFactory::createHTMLElement(name, this, 0, false);
+
+    return createElement(QualifiedName(nullAtom, name, nullAtom), false, ec);
+}
+
+PassRefPtr<DocumentFragment> Document::createDocumentFragment()
+{
+    return new DocumentFragment(document());
+}
+
+PassRefPtr<Text> Document::createTextNode(const String& data)
+{
+    return new Text(this, data);
+}
+
+PassRefPtr<Comment> Document::createComment(const String& data)
+{
+    return new Comment(this, data);
+}
+
+PassRefPtr<CDATASection> Document::createCDATASection(const String& data, ExceptionCode& ec)
+{
+    if (isHTMLDocument()) {
+        ec = NOT_SUPPORTED_ERR;
+        return 0;
+    }
+    return new CDATASection(this, data);
+}
+
+PassRefPtr<ProcessingInstruction> Document::createProcessingInstruction(const String& target, const String& data, ExceptionCode& ec)
+{
+    if (!isValidName(target)) {
+        ec = INVALID_CHARACTER_ERR;
+        return 0;
+    }
+    if (isHTMLDocument()) {
+        ec = NOT_SUPPORTED_ERR;
+        return 0;
+    }
+    return new ProcessingInstruction(this, target, data);
+}
+
+PassRefPtr<EntityReference> Document::createEntityReference(const String& name, ExceptionCode& ec)
+{
+    if (!isValidName(name)) {
+        ec = INVALID_CHARACTER_ERR;
+        return 0;
+    }
+    if (isHTMLDocument()) {
+        ec = NOT_SUPPORTED_ERR;
+        return 0;
+    }
+    return new EntityReference(this, name);
+}
+
+PassRefPtr<EditingText> Document::createEditingTextNode(const String& text)
+{
+    return new EditingText(this, text);
+}
+
+PassRefPtr<CSSStyleDeclaration> Document::createCSSStyleDeclaration()
+{
+    return CSSMutableStyleDeclaration::create();
+}
+
+PassRefPtr<Node> Document::importNode(Node* importedNode, bool deep, ExceptionCode& ec)
+{
+    ec = 0;
+    
+    if (!importedNode
+#if ENABLE(SVG) && ENABLE(DASHBOARD_SUPPORT)
+        || (importedNode->isSVGElement() && page() && page()->settings()->usesDashboardBackwardCompatibilityMode())
+#endif
+        ) {
+        ec = NOT_SUPPORTED_ERR;
+        return 0;
+    }
+
+    switch (importedNode->nodeType()) {
+        case TEXT_NODE:
+            return createTextNode(importedNode->nodeValue());
+        case CDATA_SECTION_NODE:
+            return createCDATASection(importedNode->nodeValue(), ec);
+        case ENTITY_REFERENCE_NODE:
+            return createEntityReference(importedNode->nodeName(), ec);
+        case PROCESSING_INSTRUCTION_NODE:
+            return createProcessingInstruction(importedNode->nodeName(), importedNode->nodeValue(), ec);
+        case COMMENT_NODE:
+            return createComment(importedNode->nodeValue());
+        case ELEMENT_NODE: {
+            Element* oldElement = static_cast<Element*>(importedNode);
+            RefPtr<Element> newElement = createElementNS(oldElement->namespaceURI(), oldElement->tagQName().toString(), ec);
+                        
+            if (ec)
+                return 0;
+
+            NamedAttrMap* attrs = oldElement->attributes(true);
+            if (attrs) {
+                unsigned length = attrs->length();
+                for (unsigned i = 0; i < length; i++) {
+                    Attribute* attr = attrs->attributeItem(i);
+                    newElement->setAttribute(attr->name(), attr->value().impl(), ec);
+                    if (ec)
+                        return 0;
+                }
+            }
+
+            newElement->copyNonAttributeProperties(oldElement);
+
+            if (deep) {
+                for (Node* oldChild = oldElement->firstChild(); oldChild; oldChild = oldChild->nextSibling()) {
+                    RefPtr<Node> newChild = importNode(oldChild, true, ec);
+                    if (ec)
+                        return 0;
+                    newElement->appendChild(newChild.release(), ec);
+                    if (ec)
+                        return 0;
+                }
+            }
+
+            return newElement.release();
+        }
+        case ATTRIBUTE_NODE: {
+            RefPtr<Attr> newAttr = new Attr(0, this, static_cast<Attr*>(importedNode)->attr()->clone());
+            newAttr->createTextChild();
+            return newAttr.release();
+        }
+        case DOCUMENT_FRAGMENT_NODE: {
+            DocumentFragment* oldFragment = static_cast<DocumentFragment*>(importedNode);
+            RefPtr<DocumentFragment> newFragment = createDocumentFragment();
+            if (deep) {
+                for (Node* oldChild = oldFragment->firstChild(); oldChild; oldChild = oldChild->nextSibling()) {
+                    RefPtr<Node> newChild = importNode(oldChild, true, ec);
+                    if (ec)
+                        return 0;
+                    newFragment->appendChild(newChild.release(), ec);
+                    if (ec)
+                        return 0;
+                }
+            }
+            
+            return newFragment.release();
+        }
+        case ENTITY_NODE:
+        case NOTATION_NODE:
+            // FIXME: It should be possible to import these node types, however in DOM3 the DocumentType is readonly, so there isn't much sense in doing that.
+            // Ability to add these imported nodes to a DocumentType will be considered for addition to a future release of the DOM.
+        case DOCUMENT_NODE:
+        case DOCUMENT_TYPE_NODE:
+        case XPATH_NAMESPACE_NODE:
+            break;
+    }
+
+    ec = NOT_SUPPORTED_ERR;
+    return 0;
+}
+
+
+PassRefPtr<Node> Document::adoptNode(PassRefPtr<Node> source, ExceptionCode& ec)
+{
+    if (!source) {
+        ec = NOT_SUPPORTED_ERR;
+        return 0;
+    }
+
+    if (source->isReadOnlyNode()) {
+        ec = NO_MODIFICATION_ALLOWED_ERR;
+        return 0;
+    }
+
+    switch (source->nodeType()) {
+        case ENTITY_NODE:
+        case NOTATION_NODE:
+        case DOCUMENT_NODE:
+        case DOCUMENT_TYPE_NODE:
+        case XPATH_NAMESPACE_NODE:
+            ec = NOT_SUPPORTED_ERR;
+            return 0;            
+        case ATTRIBUTE_NODE: {                   
+            Attr* attr = static_cast<Attr*>(source.get());
+            if (attr->ownerElement())
+                attr->ownerElement()->removeAttributeNode(attr, ec);
+            attr->setSpecified(true);
+            break;
+        }       
+        default:
+            if (source->parentNode())
+                source->parentNode()->removeChild(source.get(), ec);
+    }
+                
+    for (Node* node = source.get(); node; node = node->traverseNextNode(source.get()))
+        node->setDocument(this);
+
+    return source;
+}
+
+bool Document::hasPrefixNamespaceMismatch(const QualifiedName& qName)
+{
+    static const AtomicString xmlnsNamespaceURI("http://www.w3.org/2000/xmlns/");
+    static const AtomicString xmlns("xmlns");
+    static const AtomicString xml("xml");
+
+    // These checks are from DOM Core Level 2, createElementNS
+    // http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-DocCrElNS
+    if (!qName.prefix().isEmpty() && qName.namespaceURI().isNull()) // createElementNS(null, "html:div")
+        return true;
+    if (qName.prefix() == xml && qName.namespaceURI() != XMLNames::xmlNamespaceURI) // createElementNS("http://www.example.com", "xml:lang")
+        return true;
+
+    // Required by DOM Level 3 Core and unspecified by DOM Level 2 Core:
+    // http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/core.html#ID-DocCrElNS
+    // createElementNS("http://www.w3.org/2000/xmlns/", "foo:bar"), createElementNS(null, "xmlns:bar")
+    if ((qName.prefix() == xmlns && qName.namespaceURI() != xmlnsNamespaceURI) || (qName.prefix() != xmlns && qName.namespaceURI() == xmlnsNamespaceURI))
+        return true;
+
+    return false;
+}
+
+// FIXME: This should really be in a possible ElementFactory class
+PassRefPtr<Element> Document::createElement(const QualifiedName& qName, bool createdByParser, ExceptionCode& ec)
+{
+    RefPtr<Element> e;
+
+    // FIXME: Use registered namespaces and look up in a hash to find the right factory.
+    if (qName.namespaceURI() == xhtmlNamespaceURI)
+        e = HTMLElementFactory::createHTMLElement(qName.localName(), this, 0, createdByParser);
+#if ENABLE(SVG)
+    else if (qName.namespaceURI() == SVGNames::svgNamespaceURI)
+        e = SVGElementFactory::createSVGElement(qName, this, createdByParser);
+#endif
+    
+    if (!e)
+        e = new Element(qName, document());
+    
+    // FIXME: The element factories should be fixed to not ignore qName.prefix()
+    // Instead they should pass the entire qName into element creation so we don't
+    // need to manually set the prefix after creation.
+    // Then this code can become ASSERT(qName == e.qname());
+    // and Document::createElement can stop taking ExceptionCode& as well.
+    if (e && !qName.prefix().isNull()) {
+        ec = 0;
+        e->setPrefix(qName.prefix(), ec);
+        if (ec)
+            return 0;
+    }
+    
+    return e.release();
+}
+
+PassRefPtr<Element> Document::createElementNS(const String& namespaceURI, const String& qualifiedName, ExceptionCode& ec)
+{
+    String prefix, localName;
+    if (!parseQualifiedName(qualifiedName, prefix, localName, ec))
+        return 0;
+
+    QualifiedName qName(prefix, localName, namespaceURI);
+    if (hasPrefixNamespaceMismatch(qName)) {
+        ec = NAMESPACE_ERR;
+        return 0;
+    }
+
+    return createElement(qName, false, ec);
+}
+
+Element* Document::getElementById(const AtomicString& elementId) const
+{
+    if (elementId.isEmpty())
+        return 0;
+
+    Element* element = m_elementsById.get(elementId.impl());
+    if (element)
+        return element;
+
+    if (m_duplicateIds.contains(elementId.impl())) {
+        // We know there's at least one node with this id, but we don't know what the first one is.
+        for (Node *n = traverseNextNode(); n != 0; n = n->traverseNextNode()) {
+            if (n->isElementNode()) {
+                element = static_cast<Element*>(n);
+                if (element->hasID() && element->getAttribute(idAttr) == elementId) {
+                    m_duplicateIds.remove(elementId.impl());
+                    m_elementsById.set(elementId.impl(), element);
+                    return element;
+                }
+            }
+        }
+        ASSERT_NOT_REACHED();
+    }
+    return 0;
+}
+
+String Document::readyState() const
+{
+    if (Frame* f = frame()) {
+        if (f->loader()->isComplete()) 
+            return "complete";
+        if (parsing()) 
+            return "loading";
+      return "loaded";
+      // FIXME: What does "interactive" mean?
+      // FIXME: Missing support for "uninitialized".
+    }
+    return String();
+}
+
+String Document::inputEncoding() const
+{
+    if (TextResourceDecoder* d = decoder())
+        return d->encoding().name();
+    return String();
+}
+
+String Document::defaultCharset() const
+{
+    if (Settings* settings = this->settings())
+        return settings->defaultTextEncodingName();
+    return String();
+}
+
+void Document::setCharset(const String& charset)
+{
+    if (!decoder())
+        return;
+    decoder()->setEncoding(charset, TextResourceDecoder::UserChosenEncoding);
+}
+
+void Document::setXMLVersion(const String& version, ExceptionCode& ec)
+{
+    if (!implementation()->hasFeature("XML", String())) {
+        ec = NOT_SUPPORTED_ERR;
+        return;
+    }
+   
+    // FIXME: Also raise NOT_SUPPORTED_ERR if the version is set to a value that is not supported by this Document.
+
+    m_xmlVersion = version;
+}
+
+void Document::setXMLStandalone(bool standalone, ExceptionCode& ec)
+{
+    if (!implementation()->hasFeature("XML", String())) {
+        ec = NOT_SUPPORTED_ERR;
+        return;
+    }
+
+    m_xmlStandalone = standalone;
+}
+
+void Document::setDocumentURI(const String& uri)
+{
+    m_documentURI = uri;
+    updateBaseURL();
+}
+
+KURL Document::baseURI() const
+{
+    return m_baseURL;
+}
+
+Element* Document::elementFromPoint(int x, int y) const
+{
+    if (!renderer())
+        return 0;
+
+    HitTestRequest request(true, true);
+    HitTestResult result(IntPoint(x, y));
+    renderer()->layer()->hitTest(request, result); 
+
+    Node* n = result.innerNode();
+    while (n && !n->isElementNode())
+        n = n->parentNode();
+    if (n)
+        n = n->shadowAncestorNode();
+    return static_cast<Element*>(n);
+}
+
+void Document::addElementById(const AtomicString& elementId, Element* element)
+{
+    typedef HashMap<AtomicStringImpl*, Element*>::iterator iterator;
+    if (!m_duplicateIds.contains(elementId.impl())) {
+        // Fast path. The ID is not already in m_duplicateIds, so we assume that it's
+        // also not already in m_elementsById and do an add. If that add succeeds, we're done.
+        pair<iterator, bool> addResult = m_elementsById.add(elementId.impl(), element);
+        if (addResult.second)
+            return;
+        // The add failed, so this ID was already cached in m_elementsById.
+        // There are multiple elements with this ID. Remove the m_elementsById
+        // cache for this ID so getElementById searches for it next time it is called.
+        m_elementsById.remove(addResult.first);
+        m_duplicateIds.add(elementId.impl());
+    } else {
+        // There are multiple elements with this ID. If it exists, remove the m_elementsById
+        // cache for this ID so getElementById searches for it next time it is called.
+        iterator cachedItem = m_elementsById.find(elementId.impl());
+        if (cachedItem != m_elementsById.end()) {
+            m_elementsById.remove(cachedItem);
+            m_duplicateIds.add(elementId.impl());
+        }
+    }
+    m_duplicateIds.add(elementId.impl());
+}
+
+void Document::removeElementById(const AtomicString& elementId, Element* element)
+{
+    if (m_elementsById.get(elementId.impl()) == element)
+        m_elementsById.remove(elementId.impl());
+    else
+        m_duplicateIds.remove(elementId.impl());
+}
+
+Element* Document::getElementByAccessKey(const String& key) const
+{
+    if (key.isEmpty())
+        return 0;
+    if (!m_accessKeyMapValid) {
+        for (Node* n = firstChild(); n; n = n->traverseNextNode()) {
+            if (!n->isElementNode())
+                continue;
+            Element* element = static_cast<Element*>(n);
+            const AtomicString& accessKey = element->getAttribute(accesskeyAttr);
+            if (!accessKey.isEmpty())
+                m_elementsByAccessKey.set(accessKey.impl(), element);
+        }
+        m_accessKeyMapValid = true;
+    }
+    return m_elementsByAccessKey.get(key.impl());
+}
+
+void Document::updateTitle()
+{
+    if (Frame* f = frame())
+        f->loader()->setTitle(m_title);
+}
+
+void Document::setTitle(const String& title, Element* titleElement)
+{
+    if (!titleElement) {
+        // Title set by JavaScript -- overrides any title elements.
+        m_titleSetExplicitly = true;
+        if (!isHTMLDocument())
+            m_titleElement = 0;
+        else if (!m_titleElement) {
+            if (HTMLElement* headElement = head()) {
+                ExceptionCode ec = 0;
+                m_titleElement = createElement("title", ec);
+                ASSERT(!ec);
+                headElement->appendChild(m_titleElement, ec);
+                ASSERT(!ec);
+            }
+        }
+    } else if (titleElement != m_titleElement) {
+        if (m_titleElement || m_titleSetExplicitly)
+            // Only allow the first title element to change the title -- others have no effect.
+            return;
+        m_titleElement = titleElement;
+    }
+
+    if (m_title == title)
+        return;
+
+    m_title = title;
+    updateTitle();
+
+    if (m_titleSetExplicitly && m_titleElement && m_titleElement->hasTagName(titleTag))
+        static_cast<HTMLTitleElement*>(m_titleElement.get())->setText(m_title);
+}
+
+void Document::removeTitle(Element* titleElement)
+{
+    if (m_titleElement != titleElement)
+        return;
+
+    m_titleElement = 0;
+    m_titleSetExplicitly = false;
+
+    // Update title based on first title element in the head, if one exists.
+    if (HTMLElement* headElement = head()) {
+        for (Node* e = headElement->firstChild(); e; e = e->nextSibling())
+            if (e->hasTagName(titleTag)) {
+                HTMLTitleElement* titleElement = static_cast<HTMLTitleElement*>(e);
+                setTitle(titleElement->text(), titleElement);
+                break;
+            }
+    }
+
+    if (!m_titleElement && !m_title.isEmpty()) {
+        m_title = "";
+        updateTitle();
+    }
+}
+
+String Document::nodeName() const
+{
+    return "#document";
+}
+
+Node::NodeType Document::nodeType() const
+{
+    return DOCUMENT_NODE;
+}
+
+FrameView* Document::view() const
+{
+    return m_frame ? m_frame->view() : 0;
+}
+
+Page* Document::page() const
+{
+    return m_frame ? m_frame->page() : 0;    
+}
+
+Settings* Document::settings() const
+{
+    return m_frame ? m_frame->settings() : 0;
+}
+
+PassRefPtr<Range> Document::createRange()
+{
+    return Range::create(this);
+}
+
+PassRefPtr<NodeIterator> Document::createNodeIterator(Node* root, unsigned whatToShow, 
+    PassRefPtr<NodeFilter> filter, bool expandEntityReferences, ExceptionCode& ec)
+{
+    if (!root) {
+        ec = NOT_SUPPORTED_ERR;
+        return 0;
+    }
+    return NodeIterator::create(root, whatToShow, filter, expandEntityReferences);
+}
+
+PassRefPtr<TreeWalker> Document::createTreeWalker(Node *root, unsigned whatToShow, 
+    PassRefPtr<NodeFilter> filter, bool expandEntityReferences, ExceptionCode& ec)
+{
+    if (!root) {
+        ec = NOT_SUPPORTED_ERR;
+        return 0;
+    }
+    return TreeWalker::create(root, whatToShow, filter, expandEntityReferences);
+}
+
+void Document::setDocumentChanged(bool b)
+{
+    if (b) {
+        if (!m_docChanged) {
+            if (!changedDocuments)
+                changedDocuments = new HashSet<Document*>;
+            changedDocuments->add(this);
+        }
+        if (m_accessKeyMapValid) {
+            m_accessKeyMapValid = false;
+            m_elementsByAccessKey.clear();
+        }
+    } else {
+        if (m_docChanged && changedDocuments)
+            changedDocuments->remove(this);
+    }
+
+    m_docChanged = b;
+}
+
+void Document::recalcStyle(StyleChange change)
+{
+    // we should not enter style recalc while painting
+    if (frame() && frame()->view() && frame()->view()->isPainting()) {
+        ASSERT(!frame()->view()->isPainting());
+        return;
+    }
+    
+    if (m_inStyleRecalc)
+        return; // Guard against re-entrancy. -dwh
+        
+    m_inStyleRecalc = true;
+    suspendPostAttachCallbacks();
+    
+#ifdef ANDROID_INSTRUMENT
+    android::TimeCounter::start(android::TimeCounter::CalculateStyleTimeCounter);
+#endif
+    
+    ASSERT(!renderer() || renderArena());
+    if (!renderer() || !renderArena())
+        goto bail_out;
+
+    if (change == Force) {
+        // style selector may set this again during recalc
+        m_hasNodesWithPlaceholderStyle = false;
+        
+        RefPtr<RenderStyle> documentStyle = RenderStyle::create();
+        documentStyle->setDisplay(BLOCK);
+        documentStyle->setVisuallyOrdered(visuallyOrdered);
+        documentStyle->setZoom(frame()->pageZoomFactor());
+        m_styleSelector->setStyle(documentStyle);
+    
+        FontDescription fontDescription;
+        fontDescription.setUsePrinterFont(printing());
+        if (Settings* settings = this->settings()) {
+            fontDescription.setRenderingMode(settings->fontRenderingMode());
+            if (printing() && !settings->shouldPrintBackgrounds())
+                documentStyle->setForceBackgroundsToWhite(true);
+            const AtomicString& stdfont = settings->standardFontFamily();
+            if (!stdfont.isEmpty()) {
+                fontDescription.firstFamily().setFamily(stdfont);
+                fontDescription.firstFamily().appendFamily(0);
+            }
+            fontDescription.setKeywordSize(CSSValueMedium - CSSValueXxSmall + 1);
+            m_styleSelector->setFontSize(fontDescription, m_styleSelector->fontSizeForKeyword(CSSValueMedium, inCompatMode(), false));
+        }
+
+        documentStyle->setFontDescription(fontDescription);
+        documentStyle->font().update(m_styleSelector->fontSelector());
+        if (inCompatMode())
+            documentStyle->setHtmlHacks(true); // enable html specific rendering tricks
+
+        StyleChange ch = diff(documentStyle.get(), renderer()->style());
+        if (renderer() && ch != NoChange)
+            renderer()->setStyle(documentStyle.release());
+        if (change != Force)
+            change = ch;
+    }
+
+    for (Node* n = firstChild(); n; n = n->nextSibling())
+        if (change >= Inherit || n->hasChangedChild() || n->changed())
+            n->recalcStyle(change);
+
+#ifdef ANDROID_INSTRUMENT
+    android::TimeCounter::record(android::TimeCounter::CalculateStyleTimeCounter, __FUNCTION__);
+#endif
+
+    if (changed() && view())
+        view()->layout();
+
+bail_out:
+    setChanged(NoStyleChange);
+    setHasChangedChild(false);
+    setDocumentChanged(false);
+    
+    resumePostAttachCallbacks();
+    m_inStyleRecalc = false;
+    
+    // If we wanted to call implicitClose() during recalcStyle, do so now that we're finished.
+    if (m_closeAfterStyleRecalc) {
+        m_closeAfterStyleRecalc = false;
+        implicitClose();
+    }
+}
+
+void Document::updateRendering()
+{
+    if (hasChangedChild() && !inPageCache())
+        recalcStyle(NoChange);
+    
+    // Tell the animation controller that the style is available and it can start animations
+    if (m_frame)
+        m_frame->animation()->styleAvailable();
+}
+
+void Document::updateDocumentsRendering()
+{
+    if (!changedDocuments)
+        return;
+
+    while (changedDocuments->size()) {
+        HashSet<Document*>::iterator it = changedDocuments->begin();
+        Document* doc = *it;
+        changedDocuments->remove(it);
+        
+        doc->m_docChanged = false;
+        doc->updateRendering();
+    }
+}
+
+void Document::updateLayout()
+{
+    if (Element* oe = ownerElement())
+        oe->document()->updateLayout();
+
+    // FIXME: Dave Hyatt's pretty sure we can remove this because layout calls recalcStyle as needed.
+    updateRendering();
+
+    // Only do a layout if changes have occurred that make it necessary.      
+    FrameView* v = view();
+    if (v && renderer() && (v->layoutPending() || renderer()->needsLayout()))
+        v->layout();
+}
+
+// FIXME: This is a bad idea and needs to be removed eventually.
+// Other browsers load stylesheets before they continue parsing the web page.
+// Since we don't, we can run JavaScript code that needs answers before the
+// stylesheets are loaded. Doing a layout ignoring the pending stylesheets
+// lets us get reasonable answers. The long term solution to this problem is
+// to instead suspend JavaScript execution.
+void Document::updateLayoutIgnorePendingStylesheets()
+{
+    bool oldIgnore = m_ignorePendingStylesheets;
+    
+    if (!haveStylesheetsLoaded()) {
+        m_ignorePendingStylesheets = true;
+        // FIXME: We are willing to attempt to suppress painting with outdated style info only once.  Our assumption is that it would be
+        // dangerous to try to stop it a second time, after page content has already been loaded and displayed
+        // with accurate style information.  (Our suppression involves blanking the whole page at the
+        // moment.  If it were more refined, we might be able to do something better.)
+        // It's worth noting though that this entire method is a hack, since what we really want to do is
+        // suspend JS instead of doing a layout with inaccurate information.
+        if (body() && !body()->renderer() && m_pendingSheetLayout == NoLayoutWithPendingSheets) {
+            m_pendingSheetLayout = DidLayoutWithPendingSheets;
+            updateStyleSelector();
+        } else if (m_hasNodesWithPlaceholderStyle)
+            // If new nodes have been added or style recalc has been done with style sheets still pending, some nodes 
+            // may not have had their real style calculated yet. Normally this gets cleaned when style sheets arrive 
+            // but here we need up-to-date style immediatly.
+            recalcStyle(Force);
+    }
+
+    updateLayout();
+
+    m_ignorePendingStylesheets = oldIgnore;
+}
+
+void Document::attach()
+{
+    ASSERT(!attached());
+    ASSERT(!m_inPageCache);
+    ASSERT(!m_axObjectCache);
+
+    if (!m_renderArena)
+        m_renderArena = new RenderArena();
+    
+    // Create the rendering tree
+    setRenderer(new (m_renderArena) RenderView(this, view()));
+
+    if (!m_styleSelector) {
+        bool matchAuthorAndUserStyles = true;
+        if (Settings* docSettings = settings())
+            matchAuthorAndUserStyles = docSettings->authorAndUserStylesEnabled();
+        m_styleSelector = new CSSStyleSelector(this, userStyleSheet(), m_styleSheets.get(), m_mappedElementSheet.get(), !inCompatMode(), matchAuthorAndUserStyles);
+    }
+
+    recalcStyle(Force);
+
+    RenderObject* render = renderer();
+    setRenderer(0);
+
+    ContainerNode::attach();
+
+    setRenderer(render);
+}
+
+void Document::detach()
+{
+    ASSERT(attached());
+    ASSERT(!m_inPageCache);
+
+    clearAXObjectCache();
+    
+    RenderObject* render = renderer();
+
+    // indicate destruction mode,  i.e. attached() but renderer == 0
+    setRenderer(0);
+    
+    // Empty out these lists as a performance optimization, since detaching
+    // all the individual render objects will cause all the RenderImage
+    // objects to remove themselves from the lists.
+    m_imageLoadEventDispatchSoonList.clear();
+    m_imageLoadEventDispatchingList.clear();
+    
+    m_hoverNode = 0;
+    m_focusedNode = 0;
+    m_activeNode = 0;
+
+    ContainerNode::detach();
+
+    if (render)
+        render->destroy();
+    
+    // This is required, as our Frame might delete itself as soon as it detaches
+    // us.  However, this violates Node::detach() symantics, as it's never
+    // possible to re-attach.  Eventually Document::detach() should be renamed
+    // or this call made explicit in each of the callers of Document::detach().
+    clearFramePointer();
+    
+    if (m_renderArena) {
+        delete m_renderArena;
+        m_renderArena = 0;
+    }
+}
+
+void Document::clearFramePointer()
+{
+    m_frame = 0;
+}
+
+void Document::removeAllEventListenersFromAllNodes()
+{
+    m_windowEventListeners.clear();
+    removeAllDisconnectedNodeEventListeners();
+    for (Node *n = this; n; n = n->traverseNextNode()) {
+        if (!n->isEventTargetNode())
+            continue;
+        EventTargetNodeCast(n)->removeAllEventListeners();
+    }
+}
+
+void Document::registerDisconnectedNodeWithEventListeners(Node* node)
+{
+    m_disconnectedNodesWithEventListeners.add(node);
+}
+
+void Document::unregisterDisconnectedNodeWithEventListeners(Node* node)
+{
+    m_disconnectedNodesWithEventListeners.remove(node);
+}
+
+void Document::removeAllDisconnectedNodeEventListeners()
+{
+    HashSet<Node*>::iterator end = m_disconnectedNodesWithEventListeners.end();
+    for (HashSet<Node*>::iterator i = m_disconnectedNodesWithEventListeners.begin(); i != end; ++i)
+        EventTargetNodeCast(*i)->removeAllEventListeners();
+    m_disconnectedNodesWithEventListeners.clear();
+}
+
+void Document::clearAXObjectCache()
+{
+    // clear cache in top document
+    if (m_axObjectCache) {
+        delete m_axObjectCache;
+        m_axObjectCache = 0;
+        return;
+    }
+    
+    // ask the top-level document to clear its cache
+    Document* doc = topDocument();
+    if (doc != this)
+        doc->clearAXObjectCache();
+}
+
+AXObjectCache* Document::axObjectCache() const
+{
+    // The only document that actually has a AXObjectCache is the top-level
+    // document.  This is because we need to be able to get from any WebCoreAXObject
+    // to any other WebCoreAXObject on the same page.  Using a single cache allows
+    // lookups across nested webareas (i.e. multiple documents).
+    
+    if (m_axObjectCache) {
+        // return already known top-level cache
+        if (!ownerElement())
+            return m_axObjectCache;
+        
+        // In some pages with frames, the cache is created before the sub-webarea is
+        // inserted into the tree.  Here, we catch that case and just toss the old
+        // cache and start over.
+        // NOTE: This recovery may no longer be needed. I have been unable to trigger
+        // it again. See rdar://5794454
+        // FIXME: Can this be fixed when inserting the subframe instead of now?
+        // FIXME: If this function was called to get the cache in order to remove
+        // an AXObject, we are now deleting the cache as a whole and returning a
+        // new empty cache that does not contain the AXObject! That should actually
+        // be OK. I am concerned about other cases like this where accessing the
+        // cache blows away the AXObject being operated on.
+        delete m_axObjectCache;
+        m_axObjectCache = 0;
+    }
+
+    // ask the top-level document for its cache
+    Document* doc = topDocument();
+    if (doc != this)
+        return doc->axObjectCache();
+    
+    // this is the top-level document, so install a new cache
+    m_axObjectCache = new AXObjectCache;
+    return m_axObjectCache;
+}
+
+void Document::setVisuallyOrdered()
+{
+    visuallyOrdered = true;
+    if (renderer())
+        renderer()->style()->setVisuallyOrdered(true);
+}
+
+Tokenizer* Document::createTokenizer()
+{
+    // FIXME: this should probably pass the frame instead
+    return new XMLTokenizer(this, view());
+}
+
+void Document::open(Document* ownerDocument)
+{
+    if (ownerDocument) {
+        setURL(ownerDocument->url());
+        m_cookieURL = ownerDocument->cookieURL();
+        m_securityOrigin = ownerDocument->securityOrigin();
+    }
+
+    if (m_frame) {
+        if (m_frame->loader()->isLoadingMainResource() || (tokenizer() && tokenizer()->executingScript()))
+            return;
+    
+        if (m_frame->loader()->state() == FrameStateProvisional)
+            m_frame->loader()->stopAllLoaders();
+    }
+    
+    implicitOpen();
+
+    if (m_frame)
+        m_frame->loader()->didExplicitOpen();
+}
+
+void Document::cancelParsing()
+{
+    if (m_tokenizer) {
+        // We have to clear the tokenizer to avoid possibly triggering
+        // the onload handler when closing as a side effect of a cancel-style
+        // change, such as opening a new document or closing the window while
+        // still parsing
+        delete m_tokenizer;
+        m_tokenizer = 0;
+        close();
+    }
+}
+
+void Document::implicitOpen()
+{
+    cancelParsing();
+
+    clear();
+    m_tokenizer = createTokenizer();
+    setParsing(true);
+}
+
+HTMLElement* Document::body()
+{
+    Node* de = documentElement();
+    if (!de)
+        return 0;
+    
+    // try to prefer a FRAMESET element over BODY
+    Node* body = 0;
+    for (Node* i = de->firstChild(); i; i = i->nextSibling()) {
+        if (i->hasTagName(framesetTag))
+            return static_cast<HTMLElement*>(i);
+        
+        if (i->hasTagName(bodyTag) && !body)
+            body = i;
+    }
+    return static_cast<HTMLElement*>(body);
+}
+
+void Document::setBody(PassRefPtr<HTMLElement> newBody, ExceptionCode& ec)
+{
+    if (!newBody || !documentElement()) { 
+        ec = HIERARCHY_REQUEST_ERR;
+        return;
+    }
+
+    HTMLElement* b = body();
+    if (!b)
+        documentElement()->appendChild(newBody, ec);
+    else
+        documentElement()->replaceChild(newBody, b, ec);
+}
+
+HTMLHeadElement* Document::head()
+{
+    Node* de = documentElement();
+    if (!de)
+        return 0;
+
+    for (Node* e = de->firstChild(); e; e = e->nextSibling())
+        if (e->hasTagName(headTag))
+            return static_cast<HTMLHeadElement*>(e);
+
+    return 0;
+}
+
+void Document::close()
+{
+    Frame* frame = this->frame();
+    if (frame) {
+        // This code calls implicitClose() if all loading has completed.
+        FrameLoader* frameLoader = frame->loader();
+        frameLoader->endIfNotLoadingMainResource();
+        frameLoader->checkCompleted();
+    } else {
+        // Because we have no frame, we don't know if all loading has completed,
+        // so we just call implicitClose() immediately. FIXME: This might fire
+        // the load event prematurely <http://bugs.webkit.org/show_bug.cgi?id=14568>.
+        implicitClose();
+    }
+}
+
+void Document::implicitClose()
+{
+    // If we're in the middle of recalcStyle, we need to defer the close until the style information is accurate and all elements are re-attached.
+    if (m_inStyleRecalc) {
+        m_closeAfterStyleRecalc = true;
+        return;
+    }
+
+    bool wasLocationChangePending = frame() && frame()->loader()->isScheduledLocationChangePending();
+    bool doload = !parsing() && m_tokenizer && !m_processingLoadEvent && !wasLocationChangePending;
+    
+    if (!doload)
+        return;
+
+    m_processingLoadEvent = true;
+
+    m_wellFormed = m_tokenizer && m_tokenizer->wellFormed();
+
+    // We have to clear the tokenizer, in case someone document.write()s from the
+    // onLoad event handler, as in Radar 3206524.
+    delete m_tokenizer;
+    m_tokenizer = 0;
+
+    // Parser should have picked up all preloads by now
+    m_docLoader->clearPreloads();
+
+    // Create a body element if we don't already have one. See Radar 3758785.
+    if (!this->body() && isHTMLDocument()) {
+        if (Node* documentElement = this->documentElement()) {
+            ExceptionCode ec = 0;
+            documentElement->appendChild(new HTMLBodyElement(this), ec);
+            ASSERT(!ec);
+        }
+    }
+
+    // FIXME: We kick off the icon loader when the Document is done parsing.
+    // There are earlier opportunities we could start it:
+    //  -When the <head> finishes parsing
+    //  -When any new HTMLLinkElement is inserted into the document
+    // But those add a dynamic component to the favicon that has UI 
+    // ramifications, and we need to decide what is the Right Thing To Do(tm)
+    Frame* f = frame();
+    if (f)
+        f->loader()->startIconLoader();
+
+    // Resume the animations (or start them)
+    if (f)
+        f->animation()->resumeAnimations(this);
+
+    dispatchImageLoadEventsNow();
+    this->dispatchWindowEvent(eventNames().loadEvent, false, false);
+    if (f)
+        f->loader()->handledOnloadEvents();
+#ifdef INSTRUMENT_LAYOUT_SCHEDULING
+    if (!ownerElement())
+        printf("onload fired at %d\n", elapsedTime());
+#endif
+
+    m_processingLoadEvent = false;
+
+    // An event handler may have removed the frame
+    if (!frame())
+        return;
+
+    // Make sure both the initial layout and reflow happen after the onload
+    // fires. This will improve onload scores, and other browsers do it.
+    // If they wanna cheat, we can too. -dwh
+
+    if (frame()->loader()->isScheduledLocationChangePending() && elapsedTime() < cLayoutScheduleThreshold) {
+        // Just bail out. Before or during the onload we were shifted to another page.
+        // The old i-Bench suite does this. When this happens don't bother painting or laying out.        
+        view()->unscheduleRelayout();
+        return;
+    }
+
+    frame()->loader()->checkCallImplicitClose();
+
+    // Now do our painting/layout, but only if we aren't in a subframe or if we're in a subframe
+    // that has been sized already.  Otherwise, our view size would be incorrect, so doing any 
+    // layout/painting now would be pointless.
+    if (!ownerElement() || (ownerElement()->renderer() && !ownerElement()->renderer()->needsLayout())) {
+        updateRendering();
+        
+        // Always do a layout after loading if needed.
+        if (view() && renderer() && (!renderer()->firstChild() || renderer()->needsLayout()))
+            view()->layout();
+            
+        // Paint immediately after the document is ready.  We do this to ensure that any timers set by the
+        // onload don't have a chance to fire before we would have painted.  To avoid over-flushing we only
+        // worry about this for the top-level document.  For platforms that use native widgets for ScrollViews, this
+        // call does nothing (Mac, wx).
+        // FIXME: This causes a timing issue with the dispatchDidFinishLoad delegate callback on Mac, so think
+        // before enabling it, even if Mac becomes viewless later.
+        // See <rdar://problem/5092361>
+        if (view() && !ownerElement())
+            view()->hostWindow()->paint();
+    }
+
+#if PLATFORM(MAC)
+    if (f && renderer() && this == topDocument() && AXObjectCache::accessibilityEnabled())
+        axObjectCache()->postNotificationToElement(renderer(), "AXLoadComplete");
+#endif
+
+#if ENABLE(SVG)
+    // FIXME: Officially, time 0 is when the outermost <svg> receives its
+    // SVGLoad event, but we don't implement those yet.  This is close enough
+    // for now.  In some cases we should have fired earlier.
+    if (svgExtensions())
+        accessSVGExtensions()->startAnimations();
+#endif
+}
+
+void Document::setParsing(bool b)
+{
+    m_bParsing = b;
+    if (!m_bParsing && view())
+        view()->scheduleRelayout();
+
+#ifdef INSTRUMENT_LAYOUT_SCHEDULING
+    if (!ownerElement() && !m_bParsing)
+        printf("Parsing finished at %d\n", elapsedTime());
+#endif
+}
+
+bool Document::shouldScheduleLayout()
+{
+    // We can update layout if:
+    // (a) we actually need a layout
+    // (b) our stylesheets are all loaded
+    // (c) we have a <body>
+    return (renderer() && renderer()->needsLayout() && haveStylesheetsLoaded() &&
+            documentElement() && documentElement()->renderer() &&
+            (!documentElement()->hasTagName(htmlTag) || body()));
+}
+
+int Document::minimumLayoutDelay()
+{
+    if (m_overMinimumLayoutThreshold)
+        return 0;
+    
+    int elapsed = elapsedTime();
+    m_overMinimumLayoutThreshold = elapsed > cLayoutScheduleThreshold;
+    
+    // We'll want to schedule the timer to fire at the minimum layout threshold.
+    return max(0, cLayoutScheduleThreshold - elapsed);
+}
+
+int Document::elapsedTime() const
+{
+    return static_cast<int>((currentTime() - m_startTime) * 1000);
+}
+
+void Document::write(const String& text, Document* ownerDocument)
+{
+#ifdef INSTRUMENT_LAYOUT_SCHEDULING
+    if (!ownerElement())
+        printf("Beginning a document.write at %d\n", elapsedTime());
+#endif
+    
+    if (!m_tokenizer) {
+        open(ownerDocument);
+        ASSERT(m_tokenizer);
+        if (!m_tokenizer)
+            return;
+        write("<html>", ownerDocument);
+    }
+    m_tokenizer->write(text, false);
+    
+#ifdef INSTRUMENT_LAYOUT_SCHEDULING
+    if (!ownerElement())
+        printf("Ending a document.write at %d\n", elapsedTime());
+#endif    
+}
+
+void Document::writeln(const String& text, Document* ownerDocument)
+{
+    write(text, ownerDocument);
+    write("\n", ownerDocument);
+}
+
+void Document::finishParsing()
+{
+#ifdef INSTRUMENT_LAYOUT_SCHEDULING
+    if (!ownerElement())
+        printf("Received all data at %d\n", elapsedTime());
+#endif
+    
+    // Let the tokenizer go through as much data as it can.  There will be three possible outcomes after
+    // finish() is called:
+    // (1) All remaining data is parsed, document isn't loaded yet
+    // (2) All remaining data is parsed, document is loaded, tokenizer gets deleted
+    // (3) Data is still remaining to be parsed.
+    if (m_tokenizer)
+        m_tokenizer->finish();
+}
+
+void Document::clear()
+{
+    delete m_tokenizer;
+    m_tokenizer = 0;
+
+    removeChildren();
+
+    m_windowEventListeners.clear();
+}
+
+const KURL& Document::virtualURL() const
+{
+    return m_url;
+}
+
+void Document::setURL(const KURL& url)
+{
+    const KURL& newURL = url.isEmpty() ? blankURL() : url;
+    if (newURL == m_url)
+        return;
+
+    m_url = newURL;
+    m_documentURI = m_url.string();
+    updateBaseURL();
+}
+
+void Document::setBaseElementURL(const KURL& baseElementURL)
+{ 
+    m_baseElementURL = baseElementURL;
+    updateBaseURL();
+}
+
+void Document::updateBaseURL()
+{
+    m_baseURL = m_baseElementURL.isEmpty() ? KURL(documentURI()) : m_baseElementURL;
+    if (!m_baseURL.isValid())
+        m_baseURL = KURL();
+
+    if (m_elemSheet)
+        m_elemSheet->setHref(m_baseURL.string());
+    if (m_mappedElementSheet)
+        m_mappedElementSheet->setHref(m_baseURL.string());
+}
+
+void Document::setCSSStyleSheet(const String& url, const String& charset, const CachedCSSStyleSheet* sheet)
+{
+    m_sheet = CSSStyleSheet::create(this, url, charset);
+    m_sheet->parseString(sheet->sheetText());
+
+    updateStyleSelector();
+}
+
+#if FRAME_LOADS_USER_STYLESHEET
+void Document::setUserStyleSheet(const String& sheet)
+{
+    if (m_usersheet != sheet) {
+        m_usersheet = sheet;
+        updateStyleSelector();
+    }
+}
+#endif
+
+String Document::userStyleSheet() const
+{
+#if FRAME_LOADS_USER_STYLESHEET
+    return m_usersheet;
+#else
+    Page* page = this->page();
+    if (!page)
+        return String();
+    return page->userStyleSheet();
+#endif
+}
+
+CSSStyleSheet* Document::elementSheet()
+{
+    if (!m_elemSheet)
+        m_elemSheet = CSSStyleSheet::create(this, m_baseURL.string());
+    return m_elemSheet.get();
+}
+
+CSSStyleSheet* Document::mappedElementSheet()
+{
+    if (!m_mappedElementSheet)
+        m_mappedElementSheet = CSSStyleSheet::create(this, m_baseURL.string());
+    return m_mappedElementSheet.get();
+}
+
+static Node* nextNodeWithExactTabIndex(Node* start, int tabIndex, KeyboardEvent* event)
+{
+    // Search is inclusive of start
+    for (Node* n = start; n; n = n->traverseNextNode())
+        if (n->isKeyboardFocusable(event) && n->tabIndex() == tabIndex)
+            return n;
+    
+    return 0;
+}
+
+static Node* previousNodeWithExactTabIndex(Node* start, int tabIndex, KeyboardEvent* event)
+{
+    // Search is inclusive of start
+    for (Node* n = start; n; n = n->traversePreviousNode())
+        if (n->isKeyboardFocusable(event) && n->tabIndex() == tabIndex)
+            return n;
+    
+    return 0;
+}
+
+static Node* nextNodeWithGreaterTabIndex(Node* start, int tabIndex, KeyboardEvent* event)
+{
+    // Search is inclusive of start
+    int winningTabIndex = SHRT_MAX + 1;
+    Node* winner = 0;
+    for (Node* n = start; n; n = n->traverseNextNode())
+        if (n->isKeyboardFocusable(event) && n->tabIndex() > tabIndex && n->tabIndex() < winningTabIndex) {
+            winner = n;
+            winningTabIndex = n->tabIndex();
+        }
+    
+    return winner;
+}
+
+static Node* previousNodeWithLowerTabIndex(Node* start, int tabIndex, KeyboardEvent* event)
+{
+    // Search is inclusive of start
+    int winningTabIndex = 0;
+    Node* winner = 0;
+    for (Node* n = start; n; n = n->traversePreviousNode())
+        if (n->isKeyboardFocusable(event) && n->tabIndex() < tabIndex && n->tabIndex() > winningTabIndex) {
+            winner = n;
+            winningTabIndex = n->tabIndex();
+        }
+    
+    return winner;
+}
+
+Node* Document::nextFocusableNode(Node* start, KeyboardEvent* event)
+{
+    if (start) {
+        // If a node is excluded from the normal tabbing cycle, the next focusable node is determined by tree order
+        if (start->tabIndex() < 0) {
+            for (Node* n = start->traverseNextNode(); n; n = n->traverseNextNode())
+                if (n->isKeyboardFocusable(event) && n->tabIndex() >= 0)
+                    return n;
+        }
+    
+        // First try to find a node with the same tabindex as start that comes after start in the document.
+        if (Node* winner = nextNodeWithExactTabIndex(start->traverseNextNode(), start->tabIndex(), event))
+            return winner;
+
+        if (start->tabIndex() == 0)
+            // We've reached the last node in the document with a tabindex of 0. This is the end of the tabbing order.
+            return 0;
+    }
+
+    // Look for the first node in the document that:
+    // 1) has the lowest tabindex that is higher than start's tabindex (or 0, if start is null), and
+    // 2) comes first in the document, if there's a tie.
+    if (Node* winner = nextNodeWithGreaterTabIndex(this, start ? start->tabIndex() : 0, event))
+        return winner;
+
+    // There are no nodes with a tabindex greater than start's tabindex,
+    // so find the first node with a tabindex of 0.
+    return nextNodeWithExactTabIndex(this, 0, event);
+}
+
+Node* Document::previousFocusableNode(Node* start, KeyboardEvent* event)
+{
+    Node* last;
+    for (last = this; last->lastChild(); last = last->lastChild())
+        ; // Empty loop.
+
+    // First try to find the last node in the document that comes before start and has the same tabindex as start.
+    // If start is null, find the last node in the document with a tabindex of 0.
+    Node* startingNode;
+    int startingTabIndex;
+    if (start) {
+        startingNode = start->traversePreviousNode();
+        startingTabIndex = start->tabIndex();
+    } else {
+        startingNode = last;
+        startingTabIndex = 0;
+    }
+    
+    // However, if a node is excluded from the normal tabbing cycle, the previous focusable node is determined by tree order
+    if (startingTabIndex < 0) {
+        for (Node* n = startingNode; n; n = n->traversePreviousNode())
+            if (n->isKeyboardFocusable(event) && n->tabIndex() >= 0)
+                return n;        
+    }
+
+    if (Node* winner = previousNodeWithExactTabIndex(startingNode, startingTabIndex, event))
+        return winner;
+
+    // There are no nodes before start with the same tabindex as start, so look for a node that:
+    // 1) has the highest non-zero tabindex (that is less than start's tabindex), and
+    // 2) comes last in the document, if there's a tie.
+    startingTabIndex = (start && start->tabIndex()) ? start->tabIndex() : SHRT_MAX;
+    return previousNodeWithLowerTabIndex(last, startingTabIndex, event);
+}
+
+int Document::nodeAbsIndex(Node *node)
+{
+    ASSERT(node->document() == this);
+
+    int absIndex = 0;
+    for (Node *n = node; n && n != this; n = n->traversePreviousNode())
+        absIndex++;
+    return absIndex;
+}
+
+Node *Document::nodeWithAbsIndex(int absIndex)
+{
+    Node *n = this;
+    for (int i = 0; n && (i < absIndex); i++) {
+        n = n->traverseNextNode();
+    }
+    return n;
+}
+
+#ifdef ANDROID_META_SUPPORT
+// Though isspace() considers \t and \v to be whitespace, Win IE doesn't.
+static bool isSeparator(::UChar c)
+{
+    return c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '=' || c == ',' || c == ';' || c == '\0';
+}
+
+void Document::processMetadataSettings(const String& content)
+{
+    ASSERT(!content.isNull());
+    
+    int keyBegin, keyEnd, valueBegin, valueEnd;
+    int i = 0;
+    int length = content.length();
+    String buffer = content.lower();
+    while (i < length) {
+        // skip to first non-separator, but don't skip past the end of the string
+        while (isSeparator(buffer[i])) {
+            if (i >= length)
+                break;
+            i++;
+        }
+        keyBegin = i;
+        
+        // skip to first separator
+        while (!isSeparator(buffer[i]))
+            i++;
+        keyEnd = i;
+        
+        // skip to first '=', but don't skip past a ',', ';' or the end of the string
+        while (buffer[i] != '=') {
+            if (buffer[i] == ',' || buffer[i] == ';' || i >= length)
+                break;
+            i++;
+        }
+        
+        // skip to first non-separator, but don't skip past a ',', ';' or the end of the string
+        while (isSeparator(buffer[i])) {
+            if (buffer[i] == ',' || buffer[i] == ';' || i >= length)
+                break;
+            i++;
+        }
+        valueBegin = i;
+        
+        // skip to first separator
+        while (!isSeparator(buffer[i]))
+            i++;
+        valueEnd = i;
+        
+        ASSERT(i <= length);
+        
+        String key(buffer.substring(keyBegin, keyEnd - keyBegin));
+        String value(buffer.substring(valueBegin, valueEnd - valueBegin));
+        frame()->settings()->setMetadataSettings(key, value);
+    }
+}
+#endif
+
+void Document::processHttpEquiv(const String &equiv, const String &content)
+{
+    ASSERT(!equiv.isNull() && !content.isNull());
+
+    Frame *frame = this->frame();
+
+    if (equalIgnoringCase(equiv, "default-style")) {
+        // The preferred style set has been overridden as per section 
+        // 14.3.2 of the HTML4.0 specification.  We need to update the
+        // sheet used variable and then update our style selector. 
+        // For more info, see the test at:
+        // http://www.hixie.ch/tests/evil/css/import/main/preferred.html
+        // -dwh
+        m_selectedStylesheetSet = content;
+        m_preferredStylesheetSet = content;
+        updateStyleSelector();
+    } else if (equalIgnoringCase(equiv, "refresh")) {
+        double delay;
+        String url;
+        if (frame && parseHTTPRefresh(content, true, delay, url)) {
+            if (url.isEmpty())
+                url = frame->loader()->url().string();
+            else
+                url = completeURL(url).string();
+            frame->loader()->scheduleHTTPRedirection(delay, url);
+        }
+    } else if (equalIgnoringCase(equiv, "set-cookie")) {
+        // FIXME: make setCookie work on XML documents too; e.g. in case of <html:meta .....>
+        if (isHTMLDocument())
+            static_cast<HTMLDocument*>(this)->setCookie(content);
+    } else if (equalIgnoringCase(equiv, "content-language"))
+        setContentLanguage(content);
+    else if (equalIgnoringCase(equiv, "x-dns-prefetch-control"))
+        parseDNSPrefetchControlHeader(content);
+}
+
+MouseEventWithHitTestResults Document::prepareMouseEvent(const HitTestRequest& request, const IntPoint& documentPoint, const PlatformMouseEvent& event)
+{
+    ASSERT(!renderer() || renderer()->isRenderView());
+
+    if (!renderer())
+        return MouseEventWithHitTestResults(event, HitTestResult(IntPoint()));
+
+    HitTestResult result(documentPoint);
+    renderer()->layer()->hitTest(request, result);
+
+    if (!request.readonly)
+        updateRendering();
+
+    return MouseEventWithHitTestResults(event, result);
+}
+
+// DOM Section 1.1.1
+bool Document::childTypeAllowed(NodeType type)
+{
+    switch (type) {
+        case ATTRIBUTE_NODE:
+        case CDATA_SECTION_NODE:
+        case DOCUMENT_FRAGMENT_NODE:
+        case DOCUMENT_NODE:
+        case ENTITY_NODE:
+        case ENTITY_REFERENCE_NODE:
+        case NOTATION_NODE:
+        case TEXT_NODE:
+        case XPATH_NAMESPACE_NODE:
+            return false;
+        case COMMENT_NODE:
+        case PROCESSING_INSTRUCTION_NODE:
+            return true;
+        case DOCUMENT_TYPE_NODE:
+        case ELEMENT_NODE:
+            // Documents may contain no more than one of each of these.
+            // (One Element and one DocumentType.)
+            for (Node* c = firstChild(); c; c = c->nextSibling())
+                if (c->nodeType() == type)
+                    return false;
+            return true;
+    }
+    return false;
+}
+
+bool Document::canReplaceChild(Node* newChild, Node* oldChild)
+{
+    if (!oldChild)
+        // ContainerNode::replaceChild will raise a NOT_FOUND_ERR.
+        return true;
+
+    if (oldChild->nodeType() == newChild->nodeType())
+        return true;
+
+    int numDoctypes = 0;
+    int numElements = 0;
+
+    // First, check how many doctypes and elements we have, not counting
+    // the child we're about to remove.
+    for (Node* c = firstChild(); c; c = c->nextSibling()) {
+        if (c == oldChild)
+            continue;
+        
+        switch (c->nodeType()) {
+            case DOCUMENT_TYPE_NODE:
+                numDoctypes++;
+                break;
+            case ELEMENT_NODE:
+                numElements++;
+                break;
+            default:
+                break;
+        }
+    }
+    
+    // Then, see how many doctypes and elements might be added by the new child.
+    if (newChild->nodeType() == DOCUMENT_FRAGMENT_NODE) {
+        for (Node* c = firstChild(); c; c = c->nextSibling()) {
+            switch (c->nodeType()) {
+                case ATTRIBUTE_NODE:
+                case CDATA_SECTION_NODE:
+                case DOCUMENT_FRAGMENT_NODE:
+                case DOCUMENT_NODE:
+                case ENTITY_NODE:
+                case ENTITY_REFERENCE_NODE:
+                case NOTATION_NODE:
+                case TEXT_NODE:
+                case XPATH_NAMESPACE_NODE:
+                    return false;
+                case COMMENT_NODE:
+                case PROCESSING_INSTRUCTION_NODE:
+                    break;
+                case DOCUMENT_TYPE_NODE:
+                    numDoctypes++;
+                    break;
+                case ELEMENT_NODE:
+                    numElements++;
+                    break;
+            }
+        }
+    } else {
+        switch (newChild->nodeType()) {
+            case ATTRIBUTE_NODE:
+            case CDATA_SECTION_NODE:
+            case DOCUMENT_FRAGMENT_NODE:
+            case DOCUMENT_NODE:
+            case ENTITY_NODE:
+            case ENTITY_REFERENCE_NODE:
+            case NOTATION_NODE:
+            case TEXT_NODE:
+            case XPATH_NAMESPACE_NODE:
+                return false;
+            case COMMENT_NODE:
+            case PROCESSING_INSTRUCTION_NODE:
+                return true;
+            case DOCUMENT_TYPE_NODE:
+                numDoctypes++;
+                break;
+            case ELEMENT_NODE:
+                numElements++;
+                break;
+        }                
+    }
+        
+    if (numElements > 1 || numDoctypes > 1)
+        return false;
+    
+    return true;
+}
+
+PassRefPtr<Node> Document::cloneNode(bool /*deep*/)
+{
+    // Spec says cloning Document nodes is "implementation dependent"
+    // so we do not support it...
+    return 0;
+}
+
+StyleSheetList* Document::styleSheets()
+{
+    return m_styleSheets.get();
+}
+
+String Document::preferredStylesheetSet() const
+{
+    return m_preferredStylesheetSet;
+}
+
+String Document::selectedStylesheetSet() const
+{
+    return m_selectedStylesheetSet;
+}
+
+void Document::setSelectedStylesheetSet(const String& aString)
+{
+    m_selectedStylesheetSet = aString;
+    updateStyleSelector();
+    if (renderer())
+        renderer()->repaint();
+}
+
+// This method is called whenever a top-level stylesheet has finished loading.
+void Document::removePendingSheet()
+{
+    // Make sure we knew this sheet was pending, and that our count isn't out of sync.
+    ASSERT(m_pendingStylesheets > 0);
+
+    m_pendingStylesheets--;
+    
+#ifdef INSTRUMENT_LAYOUT_SCHEDULING
+    if (!ownerElement())
+        printf("Stylesheet loaded at time %d. %d stylesheets still remain.\n", elapsedTime(), m_pendingStylesheets);
+#endif
+
+    updateStyleSelector();
+    
+    if (!m_pendingStylesheets && m_tokenizer)
+        m_tokenizer->executeScriptsWaitingForStylesheets();
+
+    if (!m_pendingStylesheets && m_gotoAnchorNeededAfterStylesheetsLoad && m_frame)
+        m_frame->loader()->gotoAnchor();
+}
+
+void Document::updateStyleSelector()
+{
+    // Don't bother updating, since we haven't loaded all our style info yet
+    // and haven't calculated the style selector for the first time.
+    if (!m_didCalculateStyleSelector && !haveStylesheetsLoaded())
+        return;
+
+    if (didLayoutWithPendingStylesheets() && m_pendingStylesheets <= 0) {
+        m_pendingSheetLayout = IgnoreLayoutWithPendingSheets;
+        if (renderer())
+            renderer()->repaint();
+    }
+
+#ifdef INSTRUMENT_LAYOUT_SCHEDULING
+    if (!ownerElement())
+        printf("Beginning update of style selector at time %d.\n", elapsedTime());
+#endif
+
+    recalcStyleSelector();
+    recalcStyle(Force);
+
+#ifdef INSTRUMENT_LAYOUT_SCHEDULING
+    if (!ownerElement())
+        printf("Finished update of style selector at time %d\n", elapsedTime());
+#endif
+
+    if (renderer()) {
+        renderer()->setNeedsLayoutAndPrefWidthsRecalc();
+        if (view())
+            view()->scheduleRelayout();
+    }
+}
+
+void Document::addStyleSheetCandidateNode(Node* node, bool createdByParser)
+{
+    // Until the <body> exists, we have no choice but to compare document positions,
+    // since styles outside of the body and head continue to be shunted into the head
+    // (and thus can shift to end up before dynamically added DOM content that is also
+    // outside the body).
+    if ((createdByParser && body()) || m_styleSheetCandidateNodes.isEmpty()) {
+        m_styleSheetCandidateNodes.add(node);
+        return;
+    }
+
+    // Determine an appropriate insertion point.
+    ListHashSet<Node*>::iterator begin = m_styleSheetCandidateNodes.begin();
+    ListHashSet<Node*>::iterator end = m_styleSheetCandidateNodes.end();
+    ListHashSet<Node*>::iterator it = end;
+    Node* followingNode = 0;
+    do {
+        --it;
+        Node* n = *it;
+        unsigned short position = n->compareDocumentPosition(node);
+        if (position == DOCUMENT_POSITION_FOLLOWING) {
+            m_styleSheetCandidateNodes.insertBefore(followingNode, node);
+            return;
+        }
+        followingNode = n;
+    } while (it != begin);
+    
+    m_styleSheetCandidateNodes.insertBefore(followingNode, node);
+}
+
+void Document::removeStyleSheetCandidateNode(Node* node)
+{
+    m_styleSheetCandidateNodes.remove(node);
+}
+
+void Document::recalcStyleSelector()
+{
+    if (!renderer() || !attached())
+        return;
+
+    StyleSheetVector sheets;
+
+    bool matchAuthorAndUserStyles = true;
+    if (Settings* settings = this->settings())
+        matchAuthorAndUserStyles = settings->authorAndUserStylesEnabled();
+
+    ListHashSet<Node*>::iterator begin = m_styleSheetCandidateNodes.begin();
+    ListHashSet<Node*>::iterator end = m_styleSheetCandidateNodes.end();
+    if (!matchAuthorAndUserStyles)
+        end = begin;
+    for (ListHashSet<Node*>::iterator it = begin; it != end; ++it) {
+        Node* n = *it;
+
+        StyleSheet* sheet = 0;
+
+        if (n->nodeType() == PROCESSING_INSTRUCTION_NODE) {
+            // Processing instruction (XML documents only)
+            ProcessingInstruction* pi = static_cast<ProcessingInstruction*>(n);
+            sheet = pi->sheet();
+#if ENABLE(XSLT)
+            // Don't apply XSL transforms to already transformed documents -- <rdar://problem/4132806>
+            if (pi->isXSL() && !transformSourceDocument()) {
+                // Don't apply XSL transforms until loading is finished.
+                if (!parsing())
+                    applyXSLTransform(pi);
+                return;
+            }
+#endif
+            if (!sheet && !pi->localHref().isEmpty()) {
+                // Processing instruction with reference to an element in this document - e.g.
+                // <?xml-stylesheet href="#mystyle">, with the element
+                // <foo id="mystyle">heading { color: red; }</foo> at some location in
+                // the document
+                Element* elem = getElementById(pi->localHref().impl());
+                if (elem) {
+                    String sheetText("");
+                    for (Node* c = elem->firstChild(); c; c = c->nextSibling()) {
+                        if (c->nodeType() == TEXT_NODE || c->nodeType() == CDATA_SECTION_NODE)
+                            sheetText += c->nodeValue();
+                    }
+
+                    RefPtr<CSSStyleSheet> cssSheet = CSSStyleSheet::create(this);
+                    cssSheet->parseString(sheetText);
+                    pi->setCSSStyleSheet(cssSheet);
+                    sheet = cssSheet.get();
+                }
+            }
+        } else if (n->isHTMLElement() && (n->hasTagName(linkTag) || n->hasTagName(styleTag))
+#if ENABLE(SVG)
+            ||  (n->isSVGElement() && n->hasTagName(SVGNames::styleTag))
+#endif
+        ) {
+            Element* e = static_cast<Element*>(n);
+            AtomicString title = e->getAttribute(titleAttr);
+            bool enabledViaScript = false;
+            if (e->hasLocalName(linkTag)) {
+                // <LINK> element
+                HTMLLinkElement* l = static_cast<HTMLLinkElement*>(n);
+                if (l->isDisabled())
+                    continue;
+                enabledViaScript = l->isEnabledViaScript();
+                if (l->isLoading()) {
+                    // it is loading but we should still decide which style sheet set to use
+                    if (!enabledViaScript && !title.isEmpty() && m_preferredStylesheetSet.isEmpty()) {
+                        const AtomicString& rel = e->getAttribute(relAttr);
+                        if (!rel.contains("alternate")) {
+                            m_preferredStylesheetSet = title;
+                            m_selectedStylesheetSet = title;
+                        }
+                    }
+                    continue;
+                }
+                if (!l->sheet())
+                    title = nullAtom;
+            }
+
+            // Get the current preferred styleset.  This is the
+            // set of sheets that will be enabled.
+#if ENABLE(SVG)
+            if (n->isSVGElement() && n->hasTagName(SVGNames::styleTag))
+                sheet = static_cast<SVGStyleElement*>(n)->sheet();
+            else
+#endif
+            if (e->hasLocalName(linkTag))
+                sheet = static_cast<HTMLLinkElement*>(n)->sheet();
+            else
+                // <STYLE> element
+                sheet = static_cast<HTMLStyleElement*>(n)->sheet();
+
+            // Check to see if this sheet belongs to a styleset
+            // (thus making it PREFERRED or ALTERNATE rather than
+            // PERSISTENT).
+            if (!enabledViaScript && !title.isEmpty()) {
+                // Yes, we have a title.
+                if (m_preferredStylesheetSet.isEmpty()) {
+                    // No preferred set has been established.  If
+                    // we are NOT an alternate sheet, then establish
+                    // us as the preferred set.  Otherwise, just ignore
+                    // this sheet.
+                    AtomicString rel = e->getAttribute(relAttr);
+                    if (e->hasLocalName(styleTag) || !rel.contains("alternate"))
+                        m_preferredStylesheetSet = m_selectedStylesheetSet = title;
+                }
+
+                if (title != m_preferredStylesheetSet)
+                    sheet = 0;
+            }
+        }
+
+        if (sheet)
+            sheets.append(sheet);
+    }
+
+    m_styleSheets->swap(sheets);
+
+    // Create a new style selector
+    delete m_styleSelector;
+    m_styleSelector = new CSSStyleSelector(this, userStyleSheet(), m_styleSheets.get(), m_mappedElementSheet.get(), !inCompatMode(), matchAuthorAndUserStyles);
+    m_didCalculateStyleSelector = true;
+}
+
+void Document::setHoverNode(PassRefPtr<Node> newHoverNode)
+{
+    m_hoverNode = newHoverNode;
+}
+
+void Document::setActiveNode(PassRefPtr<Node> newActiveNode)
+{
+    m_activeNode = newActiveNode;
+}
+
+void Document::focusedNodeRemoved()
+{
+    setFocusedNode(0);
+}
+
+void Document::removeFocusedNodeOfSubtree(Node* node, bool amongChildrenOnly)
+{
+    if (!m_focusedNode || this->inPageCache()) // If the document is in the page cache, then we don't need to clear out the focused node.
+        return;
+        
+    bool nodeInSubtree = false;
+    if (amongChildrenOnly)
+        nodeInSubtree = m_focusedNode->isDescendantOf(node);
+    else
+        nodeInSubtree = (m_focusedNode == node) || m_focusedNode->isDescendantOf(node);
+    
+    if (nodeInSubtree)
+        document()->focusedNodeRemoved();
+}
+
+void Document::hoveredNodeDetached(Node* node)
+{
+    if (!m_hoverNode || (node != m_hoverNode && (!m_hoverNode->isTextNode() || node != m_hoverNode->parent())))
+        return;
+
+    m_hoverNode = node->parent();
+    while (m_hoverNode && !m_hoverNode->renderer())
+        m_hoverNode = m_hoverNode->parent();
+    if (frame())
+        frame()->eventHandler()->scheduleHoverStateUpdate();
+}
+
+void Document::activeChainNodeDetached(Node* node)
+{
+    if (!m_activeNode || (node != m_activeNode && (!m_activeNode->isTextNode() || node != m_activeNode->parent())))
+        return;
+
+    m_activeNode = node->parent();
+    while (m_activeNode && !m_activeNode->renderer())
+        m_activeNode = m_activeNode->parent();
+}
+
+#if ENABLE(DASHBOARD_SUPPORT)
+const Vector<DashboardRegionValue>& Document::dashboardRegions() const
+{
+    return m_dashboardRegions;
+}
+
+void Document::setDashboardRegions(const Vector<DashboardRegionValue>& regions)
+{
+    m_dashboardRegions = regions;
+    setDashboardRegionsDirty(false);
+}
+#endif
+
+bool Document::setFocusedNode(PassRefPtr<Node> newFocusedNode)
+{    
+    // Make sure newFocusedNode is actually in this document
+    if (newFocusedNode && (newFocusedNode->document() != this))
+        return true;
+
+    if (m_focusedNode == newFocusedNode)
+        return true;
+
+    if (m_inPageCache)
+        return false;
+
+    bool focusChangeBlocked = false;
+    RefPtr<Node> oldFocusedNode = m_focusedNode;
+    m_focusedNode = 0;
+
+    // Remove focus from the existing focus node (if any)
+    if (oldFocusedNode && !oldFocusedNode->m_inDetach) { 
+        if (oldFocusedNode->active())
+            oldFocusedNode->setActive(false);
+
+        oldFocusedNode->setFocus(false);
+                
+        // Dispatch a change event for text fields or textareas that have been edited
+        RenderObject* r = static_cast<RenderObject*>(oldFocusedNode.get()->renderer());
+        if (r && (r->isTextArea() || r->isTextField()) && r->isEdited()) {
+            EventTargetNodeCast(oldFocusedNode.get())->dispatchEventForType(eventNames().changeEvent, true, false);
+            if ((r = static_cast<RenderObject*>(oldFocusedNode.get()->renderer())))
+                r->setEdited(false);
+        }
+
+        // Dispatch the blur event and let the node do any other blur related activities (important for text fields)
+        EventTargetNodeCast(oldFocusedNode.get())->dispatchBlurEvent();
+
+        if (m_focusedNode) {
+            // handler shifted focus
+            focusChangeBlocked = true;
+            newFocusedNode = 0;
+        }
+        EventTargetNodeCast(oldFocusedNode.get())->dispatchUIEvent(eventNames().DOMFocusOutEvent);
+        if (m_focusedNode) {
+            // handler shifted focus
+            focusChangeBlocked = true;
+            newFocusedNode = 0;
+        }
+        if ((oldFocusedNode.get() == this) && oldFocusedNode->hasOneRef())
+            return true;
+            
+        if (oldFocusedNode.get() == oldFocusedNode->rootEditableElement())
+            frame()->editor()->didEndEditing();
+    }
+
+    if (newFocusedNode) {
+        if (newFocusedNode == newFocusedNode->rootEditableElement() && !acceptsEditingFocus(newFocusedNode.get())) {
+            // delegate blocks focus change
+            focusChangeBlocked = true;
+            goto SetFocusedNodeDone;
+        }
+        // Set focus on the new node
+        m_focusedNode = newFocusedNode.get();
+
+        // Dispatch the focus event and let the node do any other focus related activities (important for text fields)
+        EventTargetNodeCast(m_focusedNode.get())->dispatchFocusEvent();
+
+        if (m_focusedNode != newFocusedNode) {
+            // handler shifted focus
+            focusChangeBlocked = true;
+            goto SetFocusedNodeDone;
+        }
+        EventTargetNodeCast(m_focusedNode.get())->dispatchUIEvent(eventNames().DOMFocusInEvent);
+        if (m_focusedNode != newFocusedNode) { 
+            // handler shifted focus
+            focusChangeBlocked = true;
+            goto SetFocusedNodeDone;
+        }
+        m_focusedNode->setFocus();
+
+        if (m_focusedNode.get() == m_focusedNode->rootEditableElement())
+            frame()->editor()->didBeginEditing();
+
+        // eww, I suck. set the qt focus correctly
+        // ### find a better place in the code for this
+        if (view()) {
+            Widget *focusWidget = widgetForNode(m_focusedNode.get());
+            if (focusWidget) {
+                // Make sure a widget has the right size before giving it focus.
+                // Otherwise, we are testing edge cases of the Widget code.
+                // Specifically, in WebCore this does not work well for text fields.
+                updateLayout();
+                // Re-get the widget in case updating the layout changed things.
+                focusWidget = widgetForNode(m_focusedNode.get());
+            }
+            if (focusWidget)
+                focusWidget->setFocus();
+            else
+                view()->setFocus();
+        }
+   }
+
+#if PLATFORM(MAC)
+    if (!focusChangeBlocked && m_focusedNode && AXObjectCache::accessibilityEnabled())
+        axObjectCache()->handleFocusedUIElementChanged();
+#endif
+
+SetFocusedNodeDone:
+    updateRendering();
+    return !focusChangeBlocked;
+  }
+  
+void Document::setCSSTarget(Node* n)
+{
+    if (m_cssTarget)
+        m_cssTarget->setChanged();
+    m_cssTarget = n;
+    if (n)
+        n->setChanged();
+}
+
+Node* Document::getCSSTarget() const
+{
+    return m_cssTarget;
+}
+
+void Document::attachNodeIterator(NodeIterator *ni)
+{
+    m_nodeIterators.add(ni);
+}
+
+void Document::detachNodeIterator(NodeIterator *ni)
+{
+    m_nodeIterators.remove(ni);
+}
+
+void Document::nodeChildrenChanged(ContainerNode* container)
+{
+    if (!page() || !page()->settings()->rangeMutationDisabledForOldAppleMail()) {
+        HashSet<Range*>::const_iterator end = m_ranges.end();
+        for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
+            (*it)->nodeChildrenChanged(container);
+    }
+}
+
+void Document::nodeWillBeRemoved(Node* n)
+{
+    HashSet<NodeIterator*>::const_iterator nodeIteratorsEnd = m_nodeIterators.end();
+    for (HashSet<NodeIterator*>::const_iterator it = m_nodeIterators.begin(); it != nodeIteratorsEnd; ++it)
+        (*it)->nodeWillBeRemoved(n);
+
+    if (!page() || !page()->settings()->rangeMutationDisabledForOldAppleMail()) {
+        HashSet<Range*>::const_iterator rangesEnd = m_ranges.end();
+        for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != rangesEnd; ++it)
+            (*it)->nodeWillBeRemoved(n);
+    }
+
+    if (Frame* frame = this->frame()) {
+        frame->selection()->nodeWillBeRemoved(n);
+        frame->dragCaretController()->nodeWillBeRemoved(n);
+    }
+}
+
+void Document::textInserted(Node* text, unsigned offset, unsigned length)
+{
+    if (!page() || !page()->settings()->rangeMutationDisabledForOldAppleMail()) {
+        HashSet<Range*>::const_iterator end = m_ranges.end();
+        for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
+            (*it)->textInserted(text, offset, length);
+    }
+
+    // Update the markers for spelling and grammar checking.
+    shiftMarkers(text, offset, length);
+}
+
+void Document::textRemoved(Node* text, unsigned offset, unsigned length)
+{
+    if (!page() || !page()->settings()->rangeMutationDisabledForOldAppleMail()) {
+        HashSet<Range*>::const_iterator end = m_ranges.end();
+        for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
+            (*it)->textRemoved(text, offset, length);
+    }
+
+    // Update the markers for spelling and grammar checking.
+    removeMarkers(text, offset, length);
+    shiftMarkers(text, offset + length, 0 - length);
+}
+
+void Document::textNodesMerged(Text* oldNode, unsigned offset)
+{
+    if (!page() || !page()->settings()->rangeMutationDisabledForOldAppleMail()) {
+        NodeWithIndex oldNodeWithIndex(oldNode);
+        HashSet<Range*>::const_iterator end = m_ranges.end();
+        for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
+            (*it)->textNodesMerged(oldNodeWithIndex, offset);
+    }
+
+    // FIXME: This should update markers for spelling and grammar checking.
+}
+
+void Document::textNodeSplit(Text* oldNode)
+{
+    if (!page() || !page()->settings()->rangeMutationDisabledForOldAppleMail()) {
+        HashSet<Range*>::const_iterator end = m_ranges.end();
+        for (HashSet<Range*>::const_iterator it = m_ranges.begin(); it != end; ++it)
+            (*it)->textNodeSplit(oldNode);
+    }
+
+    // FIXME: This should update markers for spelling and grammar checking.
+}
+
+// FIXME: eventually, this should return a DOMWindow stored in the document.
+DOMWindow* Document::domWindow() const
+{
+    if (!frame())
+        return 0;
+    return frame()->domWindow();
+}
+
+PassRefPtr<Event> Document::createEvent(const String& eventType, ExceptionCode& ec)
+{
+    if (eventType == "UIEvents" || eventType == "UIEvent")
+        return UIEvent::create();
+    if (eventType == "MouseEvents" || eventType == "MouseEvent")
+        return MouseEvent::create();
+    if (eventType == "MutationEvents" || eventType == "MutationEvent")
+        return MutationEvent::create();
+    if (eventType == "KeyboardEvents" || eventType == "KeyboardEvent")
+        return KeyboardEvent::create();
+    if (eventType == "HTMLEvents" || eventType == "Event" || eventType == "Events")
+        return Event::create();
+    if (eventType == "ProgressEvent")
+        return ProgressEvent::create();
+    if (eventType == "TextEvent")
+        return TextEvent::create();
+    if (eventType == "OverflowEvent")
+        return OverflowEvent::create();
+    if (eventType == "WheelEvent")
+        return WheelEvent::create();
+#if ENABLE(SVG)
+    if (eventType == "SVGEvents")
+        return Event::create();
+    if (eventType == "SVGZoomEvents")
+        return SVGZoomEvent::create();
+#endif
+    if (eventType == "MessageEvent")
+        return MessageEvent::create();
+    if (eventType == "WebKitAnimationEvent")
+        return WebKitAnimationEvent::create();
+    if (eventType == "WebKitTransitionEvent")
+        return WebKitTransitionEvent::create();
+#if ENABLE(TOUCH_EVENTS) // Android
+    if (eventType == "TouchEvent")
+        return TouchEvent::create();
+#endif
+    ec = NOT_SUPPORTED_ERR;
+    return 0;
+}
+
+void Document::addListenerTypeIfNeeded(const AtomicString& eventType)
+{
+    if (eventType == eventNames().DOMSubtreeModifiedEvent)
+        addListenerType(DOMSUBTREEMODIFIED_LISTENER);
+    else if (eventType == eventNames().DOMNodeInsertedEvent)
+        addListenerType(DOMNODEINSERTED_LISTENER);
+    else if (eventType == eventNames().DOMNodeRemovedEvent)
+        addListenerType(DOMNODEREMOVED_LISTENER);
+    else if (eventType == eventNames().DOMNodeRemovedFromDocumentEvent)
+        addListenerType(DOMNODEREMOVEDFROMDOCUMENT_LISTENER);
+    else if (eventType == eventNames().DOMNodeInsertedIntoDocumentEvent)
+        addListenerType(DOMNODEINSERTEDINTODOCUMENT_LISTENER);
+    else if (eventType == eventNames().DOMAttrModifiedEvent)
+        addListenerType(DOMATTRMODIFIED_LISTENER);
+    else if (eventType == eventNames().DOMCharacterDataModifiedEvent)
+        addListenerType(DOMCHARACTERDATAMODIFIED_LISTENER);
+    else if (eventType == eventNames().overflowchangedEvent)
+        addListenerType(OVERFLOWCHANGED_LISTENER);
+    else if (eventType == eventNames().webkitAnimationStartEvent)
+        addListenerType(ANIMATIONSTART_LISTENER);
+    else if (eventType == eventNames().webkitAnimationEndEvent)
+        addListenerType(ANIMATIONEND_LISTENER);
+    else if (eventType == eventNames().webkitAnimationIterationEvent)
+        addListenerType(ANIMATIONITERATION_LISTENER);
+    else if (eventType == eventNames().webkitTransitionEndEvent)
+        addListenerType(TRANSITIONEND_LISTENER);
+}
+
+CSSStyleDeclaration* Document::getOverrideStyle(Element*, const String&)
+{
+    return 0;
+}
+
+void Document::handleWindowEvent(Event* evt, bool useCapture)
+{
+    if (m_windowEventListeners.isEmpty())
+        return;
+        
+    // if any html event listeners are registered on the window, then dispatch them here
+    RegisteredEventListenerList listenersCopy = m_windowEventListeners;
+    RegisteredEventListenerList::iterator it = listenersCopy.begin();
+    
+    for (; it != listenersCopy.end(); ++it)
+        if ((*it)->eventType() == evt->type() && (*it)->useCapture() == useCapture && !(*it)->removed()) 
+            (*it)->listener()->handleEvent(evt, true);
+}
+
+void Document::setWindowInlineEventListenerForType(const AtomicString& eventType, PassRefPtr<EventListener> listener)
+{
+    // If we already have it we don't want removeWindowEventListener to delete it
+    removeWindowInlineEventListenerForType(eventType);
+    if (listener)
+        addWindowEventListener(eventType, listener, false);
+}
+
+EventListener* Document::windowInlineEventListenerForType(const AtomicString& eventType)
+{
+    RegisteredEventListenerList::iterator it = m_windowEventListeners.begin();
+    for (; it != m_windowEventListeners.end(); ++it) {
+        if ((*it)->eventType() == eventType && (*it)->listener()->isInline())
+            return (*it)->listener();
+    }
+    return 0;
+}
+
+void Document::removeWindowInlineEventListenerForType(const AtomicString& eventType)
+{
+    RegisteredEventListenerList::iterator it = m_windowEventListeners.begin();
+    for (; it != m_windowEventListeners.end(); ++it) {
+        if ((*it)->eventType() == eventType && (*it)->listener()->isInline()) {
+            if (eventType == eventNames().unloadEvent)
+                removePendingFrameUnloadEventCount();
+            else if (eventType == eventNames().beforeunloadEvent)
+                removePendingFrameBeforeUnloadEventCount();
+            m_windowEventListeners.remove(it);
+            return;
+        }
+    }
+}
+
+void Document::addWindowEventListener(const AtomicString& eventType, PassRefPtr<EventListener> listener, bool useCapture)
+{
+    if (eventType == eventNames().unloadEvent)
+        addPendingFrameUnloadEventCount();
+    else if (eventType == eventNames().beforeunloadEvent)
+        addPendingFrameBeforeUnloadEventCount();
+    // Remove existing identical listener set with identical arguments.
+    // The DOM 2 spec says that "duplicate instances are discarded" in this case.
+    removeWindowEventListener(eventType, listener.get(), useCapture);
+    m_windowEventListeners.append(RegisteredEventListener::create(eventType, listener, useCapture));
+}
+
+void Document::removeWindowEventListener(const AtomicString& eventType, EventListener* listener, bool useCapture)
+{
+    RegisteredEventListenerList::iterator it = m_windowEventListeners.begin();
+    for (; it != m_windowEventListeners.end(); ++it) {
+        RegisteredEventListener& r = **it;
+        if (r.eventType() == eventType && r.listener() == listener && r.useCapture() == useCapture) {
+            if (eventType == eventNames().unloadEvent)
+                removePendingFrameUnloadEventCount();
+            else if (eventType == eventNames().beforeunloadEvent)
+                removePendingFrameBeforeUnloadEventCount();
+            m_windowEventListeners.remove(it);
+            return;
+        }
+    }
+}
+
+bool Document::hasWindowEventListener(const AtomicString& eventType)
+{
+    RegisteredEventListenerList::iterator it = m_windowEventListeners.begin();
+    for (; it != m_windowEventListeners.end(); ++it)
+        if ((*it)->eventType() == eventType)
+            return true;
+    return false;
+}
+
+void Document::addPendingFrameUnloadEventCount() 
+{
+    if (m_frame)
+         m_frame->eventHandler()->addPendingFrameUnloadEventCount();
+}
+
+void Document::removePendingFrameUnloadEventCount() 
+{
+    if (m_frame)
+        m_frame->eventHandler()->removePendingFrameUnloadEventCount();
+}
+
+void Document::addPendingFrameBeforeUnloadEventCount() 
+{
+    if (m_frame)
+         m_frame->eventHandler()->addPendingFrameBeforeUnloadEventCount();
+}
+
+void Document::removePendingFrameBeforeUnloadEventCount() 
+{
+    if (m_frame)
+        m_frame->eventHandler()->removePendingFrameBeforeUnloadEventCount();
+}
+
+PassRefPtr<EventListener> Document::createEventListener(const String& functionName, const String& code, Node* node)
+{
+    Frame* frm = frame();
+    if (!frm || !frm->script()->isEnabled())
+        return 0;
+
+#if ENABLE(SVG)
+    if (node ? node->isSVGElement() : isSVGDocument())
+        return frm->script()->createSVGEventHandler(functionName, code, node);
+#endif
+
+    // We may want to treat compound document event handlers in a different way, in future.
+    return frm->script()->createInlineEventListener(functionName, code, node);
+}
+
+void Document::setWindowInlineEventListenerForTypeAndAttribute(const AtomicString& eventType, Attribute* attr)
+{
+    setWindowInlineEventListenerForType(eventType, createEventListener(attr->localName().string(), attr->value(), 0));
+}
+
+void Document::dispatchImageLoadEventSoon(ImageLoader* image)
+{
+    m_imageLoadEventDispatchSoonList.append(image);
+    if (!m_imageLoadEventTimer.isActive())
+        m_imageLoadEventTimer.startOneShot(0);
+}
+
+void Document::removeImage(ImageLoader* image)
+{
+    // Remove instances of this image from both lists.
+    // Use loops because we allow multiple instances to get into the lists.
+    while (m_imageLoadEventDispatchSoonList.removeRef(image)) { }
+    while (m_imageLoadEventDispatchingList.removeRef(image)) { }
+    if (m_imageLoadEventDispatchSoonList.isEmpty())
+        m_imageLoadEventTimer.stop();
+}
+
+void Document::dispatchImageLoadEventsNow()
+{
+    // need to avoid re-entering this function; if new dispatches are
+    // scheduled before the parent finishes processing the list, they
+    // will set a timer and eventually be processed
+    if (!m_imageLoadEventDispatchingList.isEmpty())
+        return;
+
+    m_imageLoadEventTimer.stop();
+    
+    m_imageLoadEventDispatchingList = m_imageLoadEventDispatchSoonList;
+    m_imageLoadEventDispatchSoonList.clear();
+    for (DeprecatedPtrListIterator<ImageLoader> it(m_imageLoadEventDispatchingList); it.current();) {
+        ImageLoader* image = it.current();
+        // Must advance iterator *before* dispatching call.
+        // Otherwise, it might be advanced automatically if dispatching the call had a side effect
+        // of destroying the current ImageLoader, and then we would advance past the *next* item,
+        // missing one altogether.
+        ++it;
+        image->dispatchLoadEvent();
+    }
+    m_imageLoadEventDispatchingList.clear();
+}
+
+void Document::imageLoadEventTimerFired(Timer<Document>*)
+{
+    dispatchImageLoadEventsNow();
+}
+
+Element* Document::ownerElement() const
+{
+    if (!frame())
+        return 0;
+    return frame()->ownerElement();
+}
+
+String Document::cookie() const
+{
+    if (page() && !page()->cookieEnabled())
+        return String();
+
+    return cookies(this, cookieURL());
+}
+
+void Document::setCookie(const String& value)
+{
+    if (page() && !page()->cookieEnabled())
+        return;
+
+    setCookies(this, cookieURL(), policyBaseURL(), value);
+}
+
+String Document::referrer() const
+{
+    if (frame())
+        return frame()->loader()->referrer();
+    return String();
+}
+
+String Document::domain() const
+{
+    return m_securityOrigin->domain();
+}
+
+void Document::setDomain(const String& newDomain)
+{
+    // Both NS and IE specify that changing the domain is only allowed when
+    // the new domain is a suffix of the old domain.
+
+    // FIXME: We should add logging indicating why a domain was not allowed.
+
+    // If the new domain is the same as the old domain, still call
+    // m_securityOrigin.setDomainForDOM. This will change the
+    // security check behavior. For example, if a page loaded on port 8000
+    // assigns its current domain using document.domain, the page will
+    // allow other pages loaded on different ports in the same domain that
+    // have also assigned to access this page.
+    if (equalIgnoringCase(domain(), newDomain)) {
+        m_securityOrigin->setDomainFromDOM(newDomain);
+        return;
+    }
+
+    int oldLength = domain().length();
+    int newLength = newDomain.length();
+    // e.g. newDomain = webkit.org (10) and domain() = www.webkit.org (14)
+    if (newLength >= oldLength)
+        return;
+
+    String test = domain();
+    // Check that it's a subdomain, not e.g. "ebkit.org"
+    if (test[oldLength - newLength - 1] != '.')
+        return;
+
+    // Now test is "webkit.org" from domain()
+    // and we check that it's the same thing as newDomain
+    test.remove(0, oldLength - newLength);
+    if (test != newDomain)
+        return;
+
+    m_securityOrigin->setDomainFromDOM(newDomain);
+}
+
+String Document::lastModified() const
+{
+    Frame* f = frame();
+    if (!f)
+        return String();
+    DocumentLoader* loader = f->loader()->documentLoader();
+    if (!loader)
+        return String();
+    return loader->response().httpHeaderField("Last-Modified");
+}
+
+static bool isValidNameNonASCII(const UChar* characters, unsigned length)
+{
+    unsigned i = 0;
+
+    UChar32 c;
+    U16_NEXT(characters, i, length, c)
+    if (!isValidNameStart(c))
+        return false;
+
+    while (i < length) {
+        U16_NEXT(characters, i, length, c)
+        if (!isValidNamePart(c))
+            return false;
+    }
+
+    return true;
+}
+
+static inline bool isValidNameASCII(const UChar* characters, unsigned length)
+{
+    UChar c = characters[0];
+    if (!(isASCIIAlpha(c) || c == ':' || c == '_'))
+        return false;
+
+    for (unsigned i = 1; i < length; ++i) {
+        c = characters[i];
+        if (!(isASCIIAlphanumeric(c) || c == ':' || c == '_' || c == '-' || c == '.'))
+            return false;
+    }
+
+    return true;
+}
+
+bool Document::isValidName(const String& name)
+{
+    unsigned length = name.length();
+    if (!length)
+        return false;
+
+    const UChar* characters = name.characters();
+    return isValidNameASCII(characters, length) || isValidNameNonASCII(characters, length);
+}
+
+bool Document::parseQualifiedName(const String& qualifiedName, String& prefix, String& localName, ExceptionCode& ec)
+{
+    unsigned length = qualifiedName.length();
+
+    if (length == 0) {
+        ec = INVALID_CHARACTER_ERR;
+        return false;
+    }
+
+    bool nameStart = true;
+    bool sawColon = false;
+    int colonPos = 0;
+
+    const UChar* s = qualifiedName.characters();
+    for (unsigned i = 0; i < length;) {
+        UChar32 c;
+        U16_NEXT(s, i, length, c)
+        if (c == ':') {
+            if (sawColon) {
+                ec = NAMESPACE_ERR;
+                return false; // multiple colons: not allowed
+            }
+            nameStart = true;
+            sawColon = true;
+            colonPos = i - 1;
+        } else if (nameStart) {
+            if (!isValidNameStart(c)) {
+                ec = INVALID_CHARACTER_ERR;
+                return false;
+            }
+            nameStart = false;
+        } else {
+            if (!isValidNamePart(c)) {
+                ec = INVALID_CHARACTER_ERR;
+                return false;
+            }
+        }
+    }
+
+    if (!sawColon) {
+        prefix = String();
+        localName = qualifiedName;
+    } else {
+        prefix = qualifiedName.substring(0, colonPos);
+        if (prefix.isEmpty()) {
+            ec = NAMESPACE_ERR;
+            return false;
+        }
+        localName = qualifiedName.substring(colonPos + 1);
+    }
+
+    if (localName.isEmpty()) {
+        ec = NAMESPACE_ERR;
+        return false;
+    }
+
+    return true;
+}
+
+void Document::addImageMap(HTMLMapElement* imageMap)
+{
+    const AtomicString& name = imageMap->getName();
+    if (!name.impl())
+        return;
+
+    // Add the image map, unless there's already another with that name.
+    // "First map wins" is the rule other browsers seem to implement.
+    m_imageMapsByName.add(name.impl(), imageMap);
+}
+
+void Document::removeImageMap(HTMLMapElement* imageMap)
+{
+    // Remove the image map by name.
+    // But don't remove some other image map that just happens to have the same name.
+    // FIXME: Use a HashCountedSet as we do for IDs to find the first remaining map
+    // once a map has been removed.
+    const AtomicString& name = imageMap->getName();
+    if (!name.impl())
+        return;
+
+    ImageMapsByName::iterator it = m_imageMapsByName.find(name.impl());
+    if (it != m_imageMapsByName.end() && it->second == imageMap)
+        m_imageMapsByName.remove(it);
+}
+
+HTMLMapElement *Document::getImageMap(const String& url) const
+{
+    if (url.isNull())
+        return 0;
+    int hashPos = url.find('#');
+    String name = (hashPos < 0 ? url : url.substring(hashPos + 1)).impl();
+    AtomicString mapName = isHTMLDocument() ? name.lower() : name;
+    return m_imageMapsByName.get(mapName.impl());
+}
+
+void Document::setDecoder(PassRefPtr<TextResourceDecoder> decoder)
+{
+    m_decoder = decoder;
+}
+
+UChar Document::backslashAsCurrencySymbol() const
+{
+    if (!m_decoder)
+        return '\\';
+    return m_decoder->encoding().backslashAsCurrencySymbol();
+}
+
+KURL Document::completeURL(const String& url) const
+{
+    // Always return a null URL when passed a null string.
+    // FIXME: Should we change the KURL constructor to have this behavior?
+    if (url.isNull())
+        return KURL();
+    if (!m_decoder)
+        return KURL(m_baseURL, url);
+    return KURL(m_baseURL, url, m_decoder->encoding());
+}
+
+bool Document::inPageCache()
+{
+    return m_inPageCache;
+}
+
+void Document::setInPageCache(bool flag)
+{
+    if (m_inPageCache == flag)
+        return;
+
+    m_inPageCache = flag;
+    if (flag) {
+        ASSERT(m_savedRenderer == 0);
+        m_savedRenderer = renderer();
+        if (FrameView* v = view())
+            v->resetScrollbars();
+    } else {
+        ASSERT(renderer() == 0 || renderer() == m_savedRenderer);
+        ASSERT(m_renderArena);
+        setRenderer(m_savedRenderer);
+        m_savedRenderer = 0;
+    }
+}
+
+void Document::documentWillBecomeInactive() 
+{
+    HashSet<Element*>::iterator end = m_documentActivationCallbackElements.end();
+    for (HashSet<Element*>::iterator i = m_documentActivationCallbackElements.begin(); i != end; ++i)
+        (*i)->documentWillBecomeInactive();
+}
+
+void Document::documentDidBecomeActive() 
+{
+    HashSet<Element*>::iterator end = m_documentActivationCallbackElements.end();
+    for (HashSet<Element*>::iterator i = m_documentActivationCallbackElements.begin(); i != end; ++i)
+        (*i)->documentDidBecomeActive();
+}
+
+void Document::registerForDocumentActivationCallbacks(Element* e)
+{
+    m_documentActivationCallbackElements.add(e);
+}
+
+void Document::unregisterForDocumentActivationCallbacks(Element* e)
+{
+    m_documentActivationCallbackElements.remove(e);
+}
+
+void Document::setShouldCreateRenderers(bool f)
+{
+    m_createRenderers = f;
+}
+
+bool Document::shouldCreateRenderers()
+{
+    return m_createRenderers;
+}
+
+// Support for Javascript execCommand, and related methods
+
+static Editor::Command command(Document* document, const String& commandName, bool userInterface = false)
+{
+    Frame* frame = document->frame();
+    if (!frame || frame->document() != document)
+        return Editor::Command();
+    return frame->editor()->command(commandName,
+        userInterface ? CommandFromDOMWithUserInterface : CommandFromDOM);
+}
+
+bool Document::execCommand(const String& commandName, bool userInterface, const String& value)
+{
+    return command(this, commandName, userInterface).execute(value);
+}
+
+bool Document::queryCommandEnabled(const String& commandName)
+{
+    return command(this, commandName).isEnabled();
+}
+
+bool Document::queryCommandIndeterm(const String& commandName)
+{
+    return command(this, commandName).state() == MixedTriState;
+}
+
+bool Document::queryCommandState(const String& commandName)
+{
+    return command(this, commandName).state() != FalseTriState;
+}
+
+bool Document::queryCommandSupported(const String& commandName)
+{
+    return command(this, commandName).isSupported();
+}
+
+String Document::queryCommandValue(const String& commandName)
+{
+    return command(this, commandName).value();
+}
+
+static IntRect placeholderRectForMarker()
+{
+    return IntRect(-1, -1, -1, -1);
+}
+
+void Document::addMarker(Range *range, DocumentMarker::MarkerType type, String description)
+{
+    // Use a TextIterator to visit the potentially multiple nodes the range covers.
+    for (TextIterator markedText(range); !markedText.atEnd(); markedText.advance()) {
+        RefPtr<Range> textPiece = markedText.range();
+        int exception = 0;
+        DocumentMarker marker = {type, textPiece->startOffset(exception), textPiece->endOffset(exception), description};
+        addMarker(textPiece->startContainer(exception), marker);
+    }
+}
+
+void Document::removeMarkers(Range* range, DocumentMarker::MarkerType markerType)
+{
+    if (m_markers.isEmpty())
+        return;
+
+    ExceptionCode ec = 0;
+    Node* startContainer = range->startContainer(ec);
+    Node* endContainer = range->endContainer(ec);
+
+    Node* pastLastNode = range->pastLastNode();
+    for (Node* node = range->firstNode(); node != pastLastNode; node = node->traverseNextNode()) {
+        int startOffset = node == startContainer ? range->startOffset(ec) : 0;
+        int endOffset = node == endContainer ? range->endOffset(ec) : INT_MAX;
+        int length = endOffset - startOffset;
+        removeMarkers(node, startOffset, length, markerType);
+    }
+}
+
+// Markers are stored in order sorted by their start offset.
+// Markers of the same type do not overlap each other.
+
+void Document::addMarker(Node* node, DocumentMarker newMarker) 
+{
+    ASSERT(newMarker.endOffset >= newMarker.startOffset);
+    if (newMarker.endOffset == newMarker.startOffset)
+        return;
+
+    MarkerMapVectorPair* vectorPair = m_markers.get(node);
+
+    if (!vectorPair) {
+        vectorPair = new MarkerMapVectorPair;
+        vectorPair->first.append(newMarker);
+        vectorPair->second.append(placeholderRectForMarker());
+        m_markers.set(node, vectorPair);
+    } else {
+        Vector<DocumentMarker>& markers = vectorPair->first;
+        Vector<IntRect>& rects = vectorPair->second;
+        size_t numMarkers = markers.size();
+        ASSERT(numMarkers == rects.size());
+        size_t i;
+        // Iterate over all markers whose start offset is less than or equal to the new marker's.
+        // If one of them is of the same type as the new marker and touches it or intersects with it
+        // (there is at most one), remove it and adjust the new marker's start offset to encompass it.
+        for (i = 0; i < numMarkers; ++i) {
+            DocumentMarker marker = markers[i];
+            if (marker.startOffset > newMarker.startOffset)
+                break;
+            if (marker.type == newMarker.type && marker.endOffset >= newMarker.startOffset) {
+                newMarker.startOffset = marker.startOffset;
+                markers.remove(i);
+                rects.remove(i);
+                numMarkers--;
+                break;
+            }
+        }
+        size_t j = i;
+        // Iterate over all markers whose end offset is less than or equal to the new marker's,
+        // removing markers of the same type as the new marker which touch it or intersect with it,
+        // adjusting the new marker's end offset to cover them if necessary.
+        while (j < numMarkers) {
+            DocumentMarker marker = markers[j];
+            if (marker.startOffset > newMarker.endOffset)
+                break;
+            if (marker.type == newMarker.type) {
+                markers.remove(j);
+                rects.remove(j);
+                if (newMarker.endOffset <= marker.endOffset) {
+                    newMarker.endOffset = marker.endOffset;
+                    break;
+                }
+                numMarkers--;
+            } else
+                j++;
+        }
+        // At this point i points to the node before which we want to insert.
+        markers.insert(i, newMarker);
+        rects.insert(i, placeholderRectForMarker());
+    }
+    
+    // repaint the affected node
+    if (node->renderer())
+        node->renderer()->repaint();
+}
+
+// copies markers from srcNode to dstNode, applying the specified shift delta to the copies.  The shift is
+// useful if, e.g., the caller has created the dstNode from a non-prefix substring of the srcNode.
+void Document::copyMarkers(Node *srcNode, unsigned startOffset, int length, Node *dstNode, int delta, DocumentMarker::MarkerType markerType)
+{
+    if (length <= 0)
+        return;
+    
+    MarkerMapVectorPair* vectorPair = m_markers.get(srcNode);
+    if (!vectorPair)
+        return;
+
+    ASSERT(vectorPair->first.size() == vectorPair->second.size());
+
+    bool docDirty = false;
+    unsigned endOffset = startOffset + length - 1;
+    Vector<DocumentMarker>& markers = vectorPair->first;
+    for (size_t i = 0; i != markers.size(); ++i) {
+        DocumentMarker marker = markers[i];
+
+        // stop if we are now past the specified range
+        if (marker.startOffset > endOffset)
+            break;
+        
+        // skip marker that is before the specified range or is the wrong type
+        if (marker.endOffset < startOffset || (marker.type != markerType && markerType != DocumentMarker::AllMarkers))
+            continue;
+
+        // pin the marker to the specified range and apply the shift delta
+        docDirty = true;
+        if (marker.startOffset < startOffset)
+            marker.startOffset = startOffset;
+        if (marker.endOffset > endOffset)
+            marker.endOffset = endOffset;
+        marker.startOffset += delta;
+        marker.endOffset += delta;
+        
+        addMarker(dstNode, marker);
+    }
+    
+    // repaint the affected node
+    if (docDirty && dstNode->renderer())
+        dstNode->renderer()->repaint();
+}
+
+void Document::removeMarkers(Node* node, unsigned startOffset, int length, DocumentMarker::MarkerType markerType)
+{
+    if (length <= 0)
+        return;
+
+    MarkerMapVectorPair* vectorPair = m_markers.get(node);
+    if (!vectorPair)
+        return;
+
+    Vector<DocumentMarker>& markers = vectorPair->first;
+    Vector<IntRect>& rects = vectorPair->second;
+    ASSERT(markers.size() == rects.size());
+    bool docDirty = false;
+    unsigned endOffset = startOffset + length;
+    for (size_t i = 0; i < markers.size();) {
+        DocumentMarker marker = markers[i];
+
+        // markers are returned in order, so stop if we are now past the specified range
+        if (marker.startOffset >= endOffset)
+            break;
+        
+        // skip marker that is wrong type or before target
+        if (marker.endOffset < startOffset || (marker.type != markerType && markerType != DocumentMarker::AllMarkers)) {
+            i++;
+            continue;
+        }
+
+        // at this point we know that marker and target intersect in some way
+        docDirty = true;
+
+        // pitch the old marker and any associated rect
+        markers.remove(i);
+        rects.remove(i);
+        
+        // add either of the resulting slices that are left after removing target
+        if (startOffset > marker.startOffset) {
+            DocumentMarker newLeft = marker;
+            newLeft.endOffset = startOffset;
+            markers.insert(i, newLeft);
+            rects.insert(i, placeholderRectForMarker());
+            // i now points to the newly-inserted node, but we want to skip that one
+            i++;
+        }
+        if (marker.endOffset > endOffset) {
+            DocumentMarker newRight = marker;
+            newRight.startOffset = endOffset;
+            markers.insert(i, newRight);
+            rects.insert(i, placeholderRectForMarker());
+            // i now points to the newly-inserted node, but we want to skip that one
+            i++;
+        }
+    }
+
+    if (markers.isEmpty()) {
+        ASSERT(rects.isEmpty());
+        m_markers.remove(node);
+        delete vectorPair;
+    }
+
+    // repaint the affected node
+    if (docDirty && node->renderer())
+        node->renderer()->repaint();
+}
+
+DocumentMarker* Document::markerContainingPoint(const IntPoint& point, DocumentMarker::MarkerType markerType)
+{
+    // outer loop: process each node that contains any markers
+    MarkerMap::iterator end = m_markers.end();
+    for (MarkerMap::iterator nodeIterator = m_markers.begin(); nodeIterator != end; ++nodeIterator) {
+        // inner loop; process each marker in this node
+        MarkerMapVectorPair* vectorPair = nodeIterator->second;
+        Vector<DocumentMarker>& markers = vectorPair->first;
+        Vector<IntRect>& rects = vectorPair->second;
+        ASSERT(markers.size() == rects.size());
+        unsigned markerCount = markers.size();
+        for (unsigned markerIndex = 0; markerIndex < markerCount; ++markerIndex) {
+            DocumentMarker& marker = markers[markerIndex];
+            
+            // skip marker that is wrong type
+            if (marker.type != markerType && markerType != DocumentMarker::AllMarkers)
+                continue;
+            
+            IntRect& r = rects[markerIndex];
+            
+            // skip placeholder rects
+            if (r == placeholderRectForMarker())
+                continue;
+            
+            if (r.contains(point))
+                return &marker;
+        }
+    }
+    
+    return 0;
+}
+
+Vector<DocumentMarker> Document::markersForNode(Node* node)
+{
+    MarkerMapVectorPair* vectorPair = m_markers.get(node);
+    if (vectorPair)
+        return vectorPair->first;
+    return Vector<DocumentMarker>();
+}
+
+Vector<IntRect> Document::renderedRectsForMarkers(DocumentMarker::MarkerType markerType)
+{
+    Vector<IntRect> result;
+    
+    // outer loop: process each node
+    MarkerMap::iterator end = m_markers.end();
+    for (MarkerMap::iterator nodeIterator = m_markers.begin(); nodeIterator != end; ++nodeIterator) {
+        // inner loop; process each marker in this node
+        MarkerMapVectorPair* vectorPair = nodeIterator->second;
+        Vector<DocumentMarker>& markers = vectorPair->first;
+        Vector<IntRect>& rects = vectorPair->second;
+        ASSERT(markers.size() == rects.size());
+        unsigned markerCount = markers.size();
+        for (unsigned markerIndex = 0; markerIndex < markerCount; ++markerIndex) {
+            DocumentMarker marker = markers[markerIndex];
+            
+            // skip marker that is wrong type
+            if (marker.type != markerType && markerType != DocumentMarker::AllMarkers)
+                continue;
+            
+            IntRect r = rects[markerIndex];
+            // skip placeholder rects
+            if (r == placeholderRectForMarker())
+                continue;
+
+            result.append(r);
+        }
+    }
+    
+    return result;
+}
+
+void Document::removeMarkers(Node* node)
+{
+    MarkerMap::iterator i = m_markers.find(node);
+    if (i != m_markers.end()) {
+        delete i->second;
+        m_markers.remove(i);
+        if (RenderObject* renderer = node->renderer())
+            renderer->repaint();
+    }
+}
+
+void Document::removeMarkers(DocumentMarker::MarkerType markerType)
+{
+    // outer loop: process each markered node in the document
+    MarkerMap markerMapCopy = m_markers;
+    MarkerMap::iterator end = markerMapCopy.end();
+    for (MarkerMap::iterator i = markerMapCopy.begin(); i != end; ++i) {
+        Node* node = i->first.get();
+        bool nodeNeedsRepaint = false;
+
+        // inner loop: process each marker in the current node
+        MarkerMapVectorPair* vectorPair = i->second;
+        Vector<DocumentMarker>& markers = vectorPair->first;
+        Vector<IntRect>& rects = vectorPair->second;
+        ASSERT(markers.size() == rects.size());
+        for (size_t i = 0; i != markers.size();) {
+            DocumentMarker marker = markers[i];
+
+            // skip nodes that are not of the specified type
+            if (marker.type != markerType && markerType != DocumentMarker::AllMarkers) {
+                ++i;
+                continue;
+            }
+
+            // pitch the old marker
+            markers.remove(i);
+            rects.remove(i);
+            nodeNeedsRepaint = true;
+            // markerIterator now points to the next node
+        }
+
+        // Redraw the node if it changed. Do this before the node is removed from m_markers, since 
+        // m_markers might contain the last reference to the node.
+        if (nodeNeedsRepaint) {
+            RenderObject* renderer = node->renderer();
+            if (renderer)
+                renderer->repaint();
+        }
+
+        // delete the node's list if it is now empty
+        if (markers.isEmpty()) {
+            ASSERT(rects.isEmpty());
+            m_markers.remove(node);
+            delete vectorPair;
+        }
+    }
+}
+
+void Document::repaintMarkers(DocumentMarker::MarkerType markerType)
+{
+    // outer loop: process each markered node in the document
+    MarkerMap::iterator end = m_markers.end();
+    for (MarkerMap::iterator i = m_markers.begin(); i != end; ++i) {
+        Node* node = i->first.get();
+        
+        // inner loop: process each marker in the current node
+        MarkerMapVectorPair* vectorPair = i->second;
+        Vector<DocumentMarker>& markers = vectorPair->first;
+        bool nodeNeedsRepaint = false;
+        for (size_t i = 0; i != markers.size(); ++i) {
+            DocumentMarker marker = markers[i];
+            
+            // skip nodes that are not of the specified type
+            if (marker.type == markerType || markerType == DocumentMarker::AllMarkers) {
+                nodeNeedsRepaint = true;
+                break;
+            }
+        }
+        
+        if (!nodeNeedsRepaint)
+            continue;
+        
+        // cause the node to be redrawn
+        if (RenderObject* renderer = node->renderer())
+            renderer->repaint();
+    }
+}
+
+void Document::setRenderedRectForMarker(Node* node, DocumentMarker marker, const IntRect& r)
+{
+    MarkerMapVectorPair* vectorPair = m_markers.get(node);
+    if (!vectorPair) {
+        ASSERT_NOT_REACHED(); // shouldn't be trying to set the rect for a marker we don't already know about
+        return;
+    }
+    
+    Vector<DocumentMarker>& markers = vectorPair->first;
+    ASSERT(markers.size() == vectorPair->second.size());
+    unsigned markerCount = markers.size();
+    for (unsigned markerIndex = 0; markerIndex < markerCount; ++markerIndex) {
+        DocumentMarker m = markers[markerIndex];
+        if (m == marker) {
+            vectorPair->second[markerIndex] = r;
+            return;
+        }
+    }
+    
+    ASSERT_NOT_REACHED(); // shouldn't be trying to set the rect for a marker we don't already know about
+}
+
+void Document::invalidateRenderedRectsForMarkersInRect(const IntRect& r)
+{
+    // outer loop: process each markered node in the document
+    MarkerMap::iterator end = m_markers.end();
+    for (MarkerMap::iterator i = m_markers.begin(); i != end; ++i) {
+        
+        // inner loop: process each rect in the current node
+        MarkerMapVectorPair* vectorPair = i->second;
+        Vector<IntRect>& rects = vectorPair->second;
+        
+        unsigned rectCount = rects.size();
+        for (unsigned rectIndex = 0; rectIndex < rectCount; ++rectIndex)
+            if (rects[rectIndex].intersects(r))
+                rects[rectIndex] = placeholderRectForMarker();
+    }
+}
+
+void Document::shiftMarkers(Node *node, unsigned startOffset, int delta, DocumentMarker::MarkerType markerType)
+{
+    MarkerMapVectorPair* vectorPair = m_markers.get(node);
+    if (!vectorPair)
+        return;
+    
+    Vector<DocumentMarker>& markers = vectorPair->first;
+    Vector<IntRect>& rects = vectorPair->second;
+    ASSERT(markers.size() == rects.size());
+    
+    bool docDirty = false;
+    for (size_t i = 0; i != markers.size(); ++i) {
+        DocumentMarker &marker = markers[i];
+        if (marker.startOffset >= startOffset && (markerType == DocumentMarker::AllMarkers || marker.type == markerType)) {
+            ASSERT((int)marker.startOffset + delta >= 0);
+            marker.startOffset += delta;
+            marker.endOffset += delta;
+            docDirty = true;
+            
+            // Marker moved, so previously-computed rendered rectangle is now invalid
+            rects[i] = placeholderRectForMarker();
+        }
+    }
+    
+    // repaint the affected node
+    if (docDirty && node->renderer())
+        node->renderer()->repaint();
+}
+
+#if ENABLE(XSLT)
+
+void Document::applyXSLTransform(ProcessingInstruction* pi)
+{
+    RefPtr<XSLTProcessor> processor = XSLTProcessor::create();
+    processor->setXSLStyleSheet(static_cast<XSLStyleSheet*>(pi->sheet()));
+    String resultMIMEType;
+    String newSource;
+    String resultEncoding;
+    if (!processor->transformToString(this, resultMIMEType, newSource, resultEncoding))
+        return;
+    // FIXME: If the transform failed we should probably report an error (like Mozilla does).
+    processor->createDocumentFromSource(newSource, resultEncoding, resultMIMEType, this, frame());
+}
+
+void Document::setTransformSource(void* doc)
+{
+    if (doc == m_transformSource)
+        return;
+
+    xmlFreeDoc((xmlDocPtr)m_transformSource);
+    m_transformSource = doc;
+}
+
+#endif
+
+void Document::setDesignMode(InheritedBool value)
+{
+    m_designMode = value;
+}
+
+Document::InheritedBool Document::getDesignMode() const
+{
+    return m_designMode;
+}
+
+bool Document::inDesignMode() const
+{
+    for (const Document* d = this; d; d = d->parentDocument()) {
+        if (d->m_designMode != inherit)
+            return d->m_designMode;
+    }
+    return false;
+}
+
+Document *Document::parentDocument() const
+{
+    Frame *childPart = frame();
+    if (!childPart)
+        return 0;
+    Frame *parent = childPart->tree()->parent();
+    if (!parent)
+        return 0;
+    return parent->document();
+}
+
+Document *Document::topDocument() const
+{
+    Document *doc = const_cast<Document *>(this);
+    Element *element;
+    while ((element = doc->ownerElement()))
+        doc = element->document();
+    
+    return doc;
+}
+
+PassRefPtr<Attr> Document::createAttributeNS(const String& namespaceURI, const String& qualifiedName, ExceptionCode& ec, bool shouldIgnoreNamespaceChecks)
+{
+    String prefix, localName;
+    if (!parseQualifiedName(qualifiedName, prefix, localName, ec))
+        return 0;
+
+    QualifiedName qName(prefix, localName, namespaceURI);
+    if (!shouldIgnoreNamespaceChecks && hasPrefixNamespaceMismatch(qName)) {
+        ec = NAMESPACE_ERR;
+        return 0;
+    }
+
+    // Spec: DOM Level 2 Core: http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-DocCrAttrNS
+    if (!shouldIgnoreNamespaceChecks && qName.localName() == "xmlns" && qName.namespaceURI() != "http://www.w3.org/2000/xmlns/") {
+        ec = NAMESPACE_ERR;
+        return 0;
+    }
+
+    // FIXME: Assume this is a mapped attribute, since createAttribute isn't namespace-aware.  There's no harm to XML
+    // documents if we're wrong.
+    return new Attr(0, this, MappedAttribute::create(qName, StringImpl::empty()));
+}
+
+#if ENABLE(SVG)
+const SVGDocumentExtensions* Document::svgExtensions()
+{
+    return m_svgExtensions.get();
+}
+
+SVGDocumentExtensions* Document::accessSVGExtensions()
+{
+    if (!m_svgExtensions)
+        m_svgExtensions.set(new SVGDocumentExtensions(this));
+    return m_svgExtensions.get();
+}
+#endif
+
+PassRefPtr<HTMLCollection> Document::images()
+{
+    return HTMLCollection::create(this, HTMLCollection::DocImages);
+}
+
+PassRefPtr<HTMLCollection> Document::applets()
+{
+    return HTMLCollection::create(this, HTMLCollection::DocApplets);
+}
+
+PassRefPtr<HTMLCollection> Document::embeds()
+{
+    return HTMLCollection::create(this, HTMLCollection::DocEmbeds);
+}
+
+PassRefPtr<HTMLCollection> Document::plugins()
+{
+    // This is an alias for embeds() required for the JS DOM bindings.
+    return HTMLCollection::create(this, HTMLCollection::DocEmbeds);
+}
+
+PassRefPtr<HTMLCollection> Document::objects()
+{
+    return HTMLCollection::create(this, HTMLCollection::DocObjects);
+}
+
+PassRefPtr<HTMLCollection> Document::scripts()
+{
+    return HTMLCollection::create(this, HTMLCollection::DocScripts);
+}
+
+PassRefPtr<HTMLCollection> Document::links()
+{
+    return HTMLCollection::create(this, HTMLCollection::DocLinks);
+}
+
+PassRefPtr<HTMLCollection> Document::forms()
+{
+    return HTMLCollection::create(this, HTMLCollection::DocForms);
+}
+
+PassRefPtr<HTMLCollection> Document::anchors()
+{
+    return HTMLCollection::create(this, HTMLCollection::DocAnchors);
+}
+
+PassRefPtr<HTMLCollection> Document::all()
+{
+    return HTMLCollection::create(this, HTMLCollection::DocAll);
+}
+
+PassRefPtr<HTMLCollection> Document::windowNamedItems(const String &name)
+{
+    return HTMLNameCollection::create(this, HTMLCollection::WindowNamedItems, name);
+}
+
+PassRefPtr<HTMLCollection> Document::documentNamedItems(const String &name)
+{
+    return HTMLNameCollection::create(this, HTMLCollection::DocumentNamedItems, name);
+}
+
+HTMLCollection::CollectionInfo* Document::nameCollectionInfo(HTMLCollection::Type type, const AtomicString& name)
+{
+    ASSERT(type >= HTMLCollection::FirstNamedDocumentCachedType);
+    unsigned index = type - HTMLCollection::FirstNamedDocumentCachedType;
+    ASSERT(index < HTMLCollection::NumNamedDocumentCachedTypes);
+
+    NamedCollectionMap& map = m_nameCollectionInfo[index];
+    NamedCollectionMap::iterator iter = map.find(name.impl());
+    if (iter == map.end())
+        iter = map.add(name.impl(), new HTMLCollection::CollectionInfo).first;
+    return iter->second;
+}
+
+void Document::finishedParsing()
+{
+    setParsing(false);
+
+    ExceptionCode ec = 0;
+    dispatchEvent(Event::create(eventNames().DOMContentLoadedEvent, true, false), ec);
+
+    if (Frame* f = frame())
+        f->loader()->finishedParsing();
+}
+
+Vector<String> Document::formElementsState() const
+{
+    Vector<String> stateVector;
+    stateVector.reserveCapacity(m_formElementsWithState.size() * 3);
+    typedef ListHashSet<HTMLFormControlElementWithState*>::const_iterator Iterator;
+    Iterator end = m_formElementsWithState.end();
+    for (Iterator it = m_formElementsWithState.begin(); it != end; ++it) {
+        HTMLFormControlElementWithState* e = *it;
+        String value;
+        if (e->saveState(value)) {
+            stateVector.append(e->name().string());
+            stateVector.append(e->type().string());
+            stateVector.append(value);
+        }
+    }
+    return stateVector;
+}
+
+#if ENABLE(XPATH)
+
+PassRefPtr<XPathExpression> Document::createExpression(const String& expression,
+                                                       XPathNSResolver* resolver,
+                                                       ExceptionCode& ec)
+{
+    if (!m_xpathEvaluator)
+        m_xpathEvaluator = XPathEvaluator::create();
+    return m_xpathEvaluator->createExpression(expression, resolver, ec);
+}
+
+PassRefPtr<XPathNSResolver> Document::createNSResolver(Node* nodeResolver)
+{
+    if (!m_xpathEvaluator)
+        m_xpathEvaluator = XPathEvaluator::create();
+    return m_xpathEvaluator->createNSResolver(nodeResolver);
+}
+
+PassRefPtr<XPathResult> Document::evaluate(const String& expression,
+                                           Node* contextNode,
+                                           XPathNSResolver* resolver,
+                                           unsigned short type,
+                                           XPathResult* result,
+                                           ExceptionCode& ec)
+{
+    if (!m_xpathEvaluator)
+        m_xpathEvaluator = XPathEvaluator::create();
+    return m_xpathEvaluator->evaluate(expression, contextNode, resolver, type, result, ec);
+}
+
+#endif // ENABLE(XPATH)
+
+void Document::setStateForNewFormElements(const Vector<String>& stateVector)
+{
+    // Walk the state vector backwards so that the value to use for each
+    // name/type pair first is the one at the end of each individual vector
+    // in the FormElementStateMap. We're using them like stacks.
+    typedef FormElementStateMap::iterator Iterator;
+    m_formElementsWithState.clear();
+    for (size_t i = stateVector.size() / 3 * 3; i; i -= 3) {
+        AtomicString a = stateVector[i - 3];
+        AtomicString b = stateVector[i - 2];
+        const String& c = stateVector[i - 1];
+        FormElementKey key(a.impl(), b.impl());
+        Iterator it = m_stateForNewFormElements.find(key);
+        if (it != m_stateForNewFormElements.end())
+            it->second.append(c);
+        else {
+            Vector<String> v(1);
+            v[0] = c;
+            m_stateForNewFormElements.set(key, v);
+        }
+    }
+}
+
+bool Document::hasStateForNewFormElements() const
+{
+    return !m_stateForNewFormElements.isEmpty();
+}
+
+bool Document::takeStateForFormElement(AtomicStringImpl* name, AtomicStringImpl* type, String& state)
+{
+    typedef FormElementStateMap::iterator Iterator;
+    Iterator it = m_stateForNewFormElements.find(FormElementKey(name, type));
+    if (it == m_stateForNewFormElements.end())
+        return false;
+    ASSERT(it->second.size());
+    state = it->second.last();
+    if (it->second.size() > 1)
+        it->second.removeLast();
+    else
+        m_stateForNewFormElements.remove(it);
+    return true;
+}
+
+FormElementKey::FormElementKey(AtomicStringImpl* name, AtomicStringImpl* type)
+    : m_name(name), m_type(type)
+{
+    ref();
+}
+
+FormElementKey::~FormElementKey()
+{
+    deref();
+}
+
+FormElementKey::FormElementKey(const FormElementKey& other)
+    : m_name(other.name()), m_type(other.type())
+{
+    ref();
+}
+
+FormElementKey& FormElementKey::operator=(const FormElementKey& other)
+{
+    other.ref();
+    deref();
+    m_name = other.name();
+    m_type = other.type();
+    return *this;
+}
+
+void FormElementKey::ref() const
+{
+    if (name())
+        name()->ref();
+    if (type())
+        type()->ref();
+}
+
+void FormElementKey::deref() const
+{
+    if (name())
+        name()->deref();
+    if (type())
+        type()->deref();
+}
+
+unsigned FormElementKeyHash::hash(const FormElementKey& k)
+{
+    ASSERT(sizeof(k) % (sizeof(uint16_t) * 2) == 0);
+
+    unsigned l = sizeof(k) / (sizeof(uint16_t) * 2);
+    const uint16_t* s = reinterpret_cast<const uint16_t*>(&k);
+    uint32_t hash = PHI;
+
+    // Main loop
+    for (; l > 0; l--) {
+        hash += s[0];
+        uint32_t tmp = (s[1] << 11) ^ hash;
+        hash = (hash << 16) ^ tmp;
+        s += 2;
+        hash += hash >> 11;
+    }
+        
+    // Force "avalanching" of final 127 bits
+    hash ^= hash << 3;
+    hash += hash >> 5;
+    hash ^= hash << 2;
+    hash += hash >> 15;
+    hash ^= hash << 10;
+
+    // this avoids ever returning a hash code of 0, since that is used to
+    // signal "hash not computed yet", using a value that is likely to be
+    // effectively the same as 0 when the low bits are masked
+    if (hash == 0)
+        hash = 0x80000000;
+
+    return hash;
+}
+
+void Document::setIconURL(const String& iconURL, const String& type)
+{
+    // FIXME - <rdar://problem/4727645> - At some point in the future, we might actually honor the "type" 
+    if (m_iconURL.isEmpty())
+        m_iconURL = iconURL;
+    else if (!type.isEmpty())
+        m_iconURL = iconURL;
+}
+
+void Document::setUseSecureKeyboardEntryWhenActive(bool usesSecureKeyboard)
+{
+    if (m_useSecureKeyboardEntryWhenActive == usesSecureKeyboard)
+        return;
+        
+    m_useSecureKeyboardEntryWhenActive = usesSecureKeyboard;
+    m_frame->updateSecureKeyboardEntryIfActive();
+}
+
+bool Document::useSecureKeyboardEntryWhenActive() const
+{
+    return m_useSecureKeyboardEntryWhenActive;
+}
+
+void Document::initSecurityContext()
+{
+    if (m_securityOrigin && !m_securityOrigin->isEmpty())
+        return;  // m_securityOrigin has already been initialized.
+
+    if (!m_frame) {
+        // No source for a security context.
+        // This can occur via document.implementation.createDocument().
+        m_cookieURL = KURL("");
+        m_securityOrigin = SecurityOrigin::createEmpty();
+        return;
+    }
+
+    // In the common case, create the security context from the currently
+    // loading URL.
+    const KURL& url = m_frame->loader()->url();
+    m_cookieURL = url;
+    m_securityOrigin = SecurityOrigin::create(url);
+
+    if (FrameLoader::allowSubstituteDataAccessToLocal()) {
+        // If this document was loaded with substituteData, then the document can
+        // load local resources.  See https://bugs.webkit.org/show_bug.cgi?id=16756
+        // and https://bugs.webkit.org/show_bug.cgi?id=19760 for further
+        // discussion.
+        DocumentLoader* documentLoader = m_frame->loader()->documentLoader();
+        if (documentLoader && documentLoader->substituteData().isValid())
+            m_securityOrigin->grantLoadLocalResources();
+    }
+
+    if (!m_securityOrigin->isEmpty())
+        return;
+
+    // If we do not obtain a meaningful origin from the URL, then we try to
+    // find one via the frame hierarchy.
+
+    Frame* ownerFrame = m_frame->tree()->parent();
+    if (!ownerFrame)
+        ownerFrame = m_frame->loader()->opener();
+
+    if (ownerFrame && ownerFrame->document()) {
+        m_cookieURL = ownerFrame->document()->cookieURL();
+        // We alias the SecurityOrigins to match Firefox, see Bug 15313
+        // https://bugs.webkit.org/show_bug.cgi?id=15313
+        m_securityOrigin = ownerFrame->document()->securityOrigin();
+    }
+}
+
+void Document::setSecurityOrigin(SecurityOrigin* securityOrigin)
+{
+    m_securityOrigin = securityOrigin;
+    initDNSPrefetch();
+}
+
+void Document::updateFocusAppearanceSoon()
+{
+    if (!m_updateFocusAppearanceTimer.isActive())
+        m_updateFocusAppearanceTimer.startOneShot(0);
+}
+
+void Document::cancelFocusAppearanceUpdate()
+{
+    m_updateFocusAppearanceTimer.stop();
+}
+
+void Document::updateFocusAppearanceTimerFired(Timer<Document>*)
+{
+    Node* node = focusedNode();
+    if (!node)
+        return;
+    if (!node->isElementNode())
+        return;
+
+    updateLayout();
+
+    Element* element = static_cast<Element*>(node);
+    if (element->isFocusable())
+        element->updateFocusAppearance(false);
+}
+
+// FF method for accessing the selection added for compatability.
+DOMSelection* Document::getSelection() const
+{
+    return frame() ? frame()->domWindow()->getSelection() : 0;
+}
+
+static inline int findSlashDotDotSlash(const UChar* characters, size_t length)
+{
+    if (length < 4)
+        return -1;
+    unsigned loopLimit = length - 3;
+    for (unsigned i = 0; i < loopLimit; ++i) {
+        if (characters[i] == '/' && characters[i + 1] == '.' && characters[i + 2] == '.' && characters[i + 3] == '/')
+            return i;
+    }
+    return -1;
+}
+
+static inline int findSlashSlash(const UChar* characters, size_t length, int position)
+{
+    if (length < 2)
+        return -1;
+    unsigned loopLimit = length - 1;
+    for (unsigned i = position; i < loopLimit; ++i) {
+        if (characters[i] == '/' && characters[i + 1] == '/')
+            return i;
+    }
+    return -1;
+}
+
+static inline int findSlashDotSlash(const UChar* characters, size_t length)
+{
+    if (length < 3)
+        return -1;
+    unsigned loopLimit = length - 2;
+    for (unsigned i = 0; i < loopLimit; ++i) {
+        if (characters[i] == '/' && characters[i + 1] == '.' && characters[i + 2] == '/')
+            return i;
+    }
+    return -1;
+}
+
+static inline bool containsColonSlashSlash(const UChar* characters, unsigned length)
+{
+    if (length < 3)
+        return false;
+    unsigned loopLimit = length - 2;
+    for (unsigned i = 0; i < loopLimit; ++i) {
+        if (characters[i] == ':' && characters[i + 1] == '/' && characters[i + 2] == '/')
+            return true;
+    }
+    return false;
+}
+
+static inline void cleanPath(Vector<UChar, 512>& path)
+{
+    // FIXME: Shold not do this in the query or anchor part.
+    int pos;
+    while ((pos = findSlashDotDotSlash(path.data(), path.size())) != -1) {
+        int prev = reverseFind(path.data(), path.size(), '/', pos - 1);
+        // don't remove the host, i.e. http://foo.org/../foo.html
+        if (prev < 0 || (prev > 3 && path[prev - 2] == ':' && path[prev - 1] == '/'))
+            path.remove(pos, 3);
+        else
+            path.remove(prev, pos - prev + 3);
+    }
+
+    // FIXME: Shold not do this in the query part.
+    // Set refPos to -2 to mean "I haven't looked for the anchor yet".
+    // We don't want to waste a function call on the search for the the anchor
+    // in the vast majority of cases where there is no "//" in the path.
+    pos = 0;
+    int refPos = -2;
+    while ((pos = findSlashSlash(path.data(), path.size(), pos)) != -1) {
+        if (refPos == -2)
+            refPos = find(path.data(), path.size(), '#');
+        if (refPos > 0 && pos >= refPos)
+            break;
+
+        if (pos == 0 || path[pos - 1] != ':')
+            path.remove(pos);
+        else
+            pos += 2;
+    }
+
+    // FIXME: Shold not do this in the query or anchor part.
+    while ((pos = findSlashDotSlash(path.data(), path.size())) != -1)
+        path.remove(pos, 2);
+}
+
+static inline bool matchLetter(UChar c, UChar lowercaseLetter)
+{
+    return (c | 0x20) == lowercaseLetter;
+}
+
+static inline bool needsTrailingSlash(const UChar* characters, unsigned length)
+{
+    if (length < 6)
+        return false;
+    if (!matchLetter(characters[0], 'h')
+            || !matchLetter(characters[1], 't')
+            || !matchLetter(characters[2], 't')
+            || !matchLetter(characters[3], 'p'))
+        return false;
+    if (!(characters[4] == ':'
+            || (matchLetter(characters[4], 's') && characters[5] == ':')))
+        return false;
+
+    unsigned pos = characters[4] == ':' ? 5 : 6;
+
+    // Skip initial two slashes if present.
+    if (pos + 1 < length && characters[pos] == '/' && characters[pos + 1] == '/')
+        pos += 2;
+
+    // Find next slash.
+    while (pos < length && characters[pos] != '/')
+        ++pos;
+
+    return pos == length;
+}
+
+unsigned Document::visitedLinkHash(const AtomicString& attributeURL) const
+{
+    const UChar* characters = attributeURL.characters();
+    unsigned length = attributeURL.length();
+    if (!length)
+        return 0;
+
+    // This is a poor man's completeURL. Faster with less memory allocation.
+    // FIXME: It's missing a lot of what completeURL does and a lot of what KURL does.
+    // For example, it does not handle international domain names properly.
+
+    // FIXME: It is wrong that we do not do further processing on strings that have "://" in them:
+    //    1) The "://" could be in the query or anchor.
+    //    2) The URL's path could have a "/./" or a "/../" or a "//" sequence in it.
+
+    // FIXME: needsTrailingSlash does not properly return true for a URL that has no path, but does
+    // have a query or anchor.
+
+    bool hasColonSlashSlash = containsColonSlashSlash(characters, length);
+
+    if (hasColonSlashSlash && !needsTrailingSlash(characters, length))
+        return AlreadyHashed::avoidDeletedValue(attributeURL.string().impl()->hash());
+
+    Vector<UChar, 512> buffer;
+
+    if (hasColonSlashSlash) {
+        // FIXME: This is incorrect for URLs that have a query or anchor; the "/" needs to go at the
+        // end of the path, *before* the query or anchor.
+        buffer.append(characters, length);
+        buffer.append('/');
+        return AlreadyHashed::avoidDeletedValue(StringImpl::computeHash(buffer.data(), buffer.size()));
+    }
+
+    switch (characters[0]) {
+        case '/':
+            buffer.append(m_baseURL.string().characters(), m_baseURL.pathStart());
+            break;
+        case '#':
+            buffer.append(m_baseURL.string().characters(), m_baseURL.pathEnd());
+            break;
+        default:
+            buffer.append(m_baseURL.string().characters(), m_baseURL.pathAfterLastSlash());
+            break;
+    }
+    buffer.append(characters, length);
+    cleanPath(buffer);
+    if (needsTrailingSlash(buffer.data(), buffer.size())) {
+        // FIXME: This is incorrect for URLs that have a query or anchor; the "/" needs to go at the
+        // end of the path, *before* the query or anchor.
+        buffer.append('/');
+    }
+
+    return AlreadyHashed::avoidDeletedValue(StringImpl::computeHash(buffer.data(), buffer.size()));
+}
+
+#if ENABLE(DATABASE)
+
+void Document::addOpenDatabase(Database* database)
+{
+    if (!m_openDatabaseSet)
+        m_openDatabaseSet.set(new DatabaseSet);
+
+    ASSERT(!m_openDatabaseSet->contains(database));
+    m_openDatabaseSet->add(database);
+}
+
+void Document::removeOpenDatabase(Database* database)
+{
+    ASSERT(m_openDatabaseSet && m_openDatabaseSet->contains(database));
+    if (!m_openDatabaseSet)
+        return;
+        
+    m_openDatabaseSet->remove(database);
+}
+
+DatabaseThread* Document::databaseThread()
+{
+    if (!m_databaseThread && !m_hasOpenDatabases) {
+        // Create the database thread on first request - but not if at least one database was already opened,
+        // because in that case we already had a database thread and terminated it and should not create another.
+        m_databaseThread = DatabaseThread::create(this);
+        if (!m_databaseThread->start())
+            m_databaseThread = 0;
+    }
+
+    return m_databaseThread.get();
+}
+
+void Document::stopDatabases()
+{
+    if (m_openDatabaseSet) {
+        DatabaseSet::iterator i = m_openDatabaseSet->begin();
+        DatabaseSet::iterator end = m_openDatabaseSet->end();
+        for (; i != end; ++i) {
+            (*i)->stop();
+            if (m_databaseThread)
+                m_databaseThread->unscheduleDatabaseTasks(*i);
+        }
+    }
+    
+    if (m_databaseThread)
+        m_databaseThread->requestTermination();
+}
+
+#endif
+
+void Document::attachRange(Range* range)
+{
+    ASSERT(!m_ranges.contains(range));
+    m_ranges.add(range);
+}
+
+void Document::detachRange(Range* range)
+{
+    ASSERT(m_ranges.contains(range));
+    m_ranges.remove(range);
+}
+
+CanvasRenderingContext2D* Document::getCSSCanvasContext(const String& type, const String& name, int width, int height)
+{
+    HTMLCanvasElement* result = getCSSCanvasElement(name);
+    if (!result)
+        return 0;
+    result->setSize(IntSize(width, height));
+    return result->getContext(type);
+}
+
+HTMLCanvasElement* Document::getCSSCanvasElement(const String& name)
+{
+    RefPtr<HTMLCanvasElement> result = m_cssCanvasElements.get(name).get();
+    if (!result) {
+        result = new HTMLCanvasElement(this);
+        m_cssCanvasElements.set(name, result);
+    }
+    return result.get();
+}
+
+void Document::initDNSPrefetch()
+{
+    m_haveExplicitlyDisabledDNSPrefetch = false;
+    m_isDNSPrefetchEnabled = securityOrigin()->protocol() == "http";
+
+    // Inherit DNS prefetch opt-out from parent frame    
+    if (Document* parent = parentDocument()) {
+        if (!parent->isDNSPrefetchEnabled())
+            m_isDNSPrefetchEnabled = false;
+    }
+}
+
+void Document::parseDNSPrefetchControlHeader(const String& dnsPrefetchControl)
+{
+    if (equalIgnoringCase(dnsPrefetchControl, "on") && !m_haveExplicitlyDisabledDNSPrefetch) {
+        m_isDNSPrefetchEnabled = true;
+        return;
+    }
+
+    m_isDNSPrefetchEnabled = false;
+    m_haveExplicitlyDisabledDNSPrefetch = true;
+}
+
+#if ENABLE(TOUCH_EVENTS) // Android
+void Document::addTouchEventListener(Node* node)
+{
+    // Note: we only keep track of touch listener in the top frame
+    if (m_frame && m_frame->tree()->parent()) {
+        m_frame->page()->mainFrame()->document()->addTouchEventListener(node);
+    } else {
+#if PLATFORM(ANDROID)
+        if (m_frame && m_frame->view() && m_touchEventListeners.isEmpty())
+            android::WebViewCore::getWebViewCore(m_frame->view())->needTouchEvents(true);
+#endif
+        m_touchEventListeners.add(node, 0);
+    }
+}
+
+void Document::removeTouchEventListener(Node* node)
+{
+    // Note: we only keep track of touch listener in the top frame
+    if (m_frame && m_frame->tree()->parent()) {
+        m_frame->page()->mainFrame()->document()->removeTouchEventListener(node);
+    } else {
+#if PLATFORM(ANDROID)
+        if (m_frame && m_frame->view() && m_touchEventListeners.size() == 1 &&
+                m_touchEventListeners.contains(node))
+            android::WebViewCore::getWebViewCore(m_frame->view())->needTouchEvents(false);
+#endif
+        m_touchEventListeners.remove(node);
+    }
+}
+
+#endif
+} // namespace WebCore