Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 748 insertions, 0 deletions

diff --git a/Source/WebCore/dom/Node.h b/Source/WebCore/dom/Node.h
new file mode 100644
index 0000000..31a4a65
--- /dev/null
+++ b/Source/WebCore/dom/Node.h
@@ -0,0 +1,748 @@
+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ *           (C) 1999 Antti Koivisto (koivisto@kde.org)
+ *           (C) 2001 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
+ *
+ * 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.
+ *
+ */
+
+#ifndef Node_h
+#define Node_h
+
+#include "EventTarget.h"
+#include "KURLHash.h"
+#include "RenderStyleConstants.h"
+#include "ScriptWrappable.h"
+#include "TreeShared.h"
+#include <wtf/Forward.h>
+#include <wtf/ListHashSet.h>
+
+#if USE(JSC)
+namespace JSC {
+    class JSGlobalData;
+    class MarkStack;
+}
+#endif
+
+namespace WebCore {
+
+class Attribute;
+class ClassNodeList;
+class ContainerNode;
+class Document;
+class DynamicNodeList;
+class Element;
+class Event;
+class EventContext;
+class EventListener;
+class FloatPoint;
+class Frame;
+class IntRect;
+class KeyboardEvent;
+class NSResolver;
+class NamedNodeMap;
+class NameNodeList;
+class NodeList;
+class NodeRareData;
+class PlatformKeyboardEvent;
+class PlatformMouseEvent;
+class PlatformWheelEvent;
+class QualifiedName;
+class RegisteredEventListener;
+class RenderArena;
+class RenderBox;
+class RenderBoxModelObject;
+class RenderObject;
+class RenderStyle;
+class TagNodeList;
+
+typedef int ExceptionCode;
+
+const int nodeStyleChangeShift = 25;
+
+// SyntheticStyleChange means that we need to go through the entire style change logic even though
+// no style property has actually changed. It is used to restructure the tree when, for instance,
+// RenderLayers are created or destroyed due to animation changes.
+enum StyleChangeType { 
+    NoStyleChange = 0, 
+    InlineStyleChange = 1 << nodeStyleChangeShift, 
+    FullStyleChange = 2 << nodeStyleChangeShift, 
+    SyntheticStyleChange = 3 << nodeStyleChangeShift
+};
+
+enum EventDispatchBehavior {
+    RetargetEvent,
+    StayInsideShadowDOM
+};
+
+class Node : public EventTarget, public TreeShared<ContainerNode>, public ScriptWrappable {
+    friend class Document;
+public:
+    enum NodeType {
+        ELEMENT_NODE = 1,
+        ATTRIBUTE_NODE = 2,
+        TEXT_NODE = 3,
+        CDATA_SECTION_NODE = 4,
+        ENTITY_REFERENCE_NODE = 5,
+        ENTITY_NODE = 6,
+        PROCESSING_INSTRUCTION_NODE = 7,
+        COMMENT_NODE = 8,
+        DOCUMENT_NODE = 9,
+        DOCUMENT_TYPE_NODE = 10,
+        DOCUMENT_FRAGMENT_NODE = 11,
+        NOTATION_NODE = 12,
+        XPATH_NAMESPACE_NODE = 13
+    };
+    enum DocumentPosition {
+        DOCUMENT_POSITION_EQUIVALENT = 0x00,
+        DOCUMENT_POSITION_DISCONNECTED = 0x01,
+        DOCUMENT_POSITION_PRECEDING = 0x02,
+        DOCUMENT_POSITION_FOLLOWING = 0x04,
+        DOCUMENT_POSITION_CONTAINS = 0x08,
+        DOCUMENT_POSITION_CONTAINED_BY = 0x10,
+        DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20,
+    };
+
+    static bool isSupported(const String& feature, const String& version);
+
+    static void startIgnoringLeaks();
+    static void stopIgnoringLeaks();
+
+    static void dumpStatistics();
+
+    enum StyleChange { NoChange, NoInherit, Inherit, Detach, Force };    
+    static StyleChange diff(const RenderStyle*, const RenderStyle*);
+
+    virtual ~Node();
+
+    // DOM methods & attributes for Node
+
+    bool hasTagName(const QualifiedName&) const;
+    virtual String nodeName() const = 0;
+    virtual String nodeValue() const;
+    virtual void setNodeValue(const String&, ExceptionCode&);
+    virtual NodeType nodeType() const = 0;
+    ContainerNode* parentNode() const;
+    Element* parentElement() const;
+    Node* previousSibling() const { return m_previous; }
+    Node* nextSibling() const { return m_next; }
+    PassRefPtr<NodeList> childNodes();
+    Node* firstChild() const;
+    Node* lastChild() const;
+    bool hasAttributes() const;
+    NamedNodeMap* attributes() const;
+
+    virtual KURL baseURI() const;
+    
+    void getSubresourceURLs(ListHashSet<KURL>&) const;
+
+    // These should all actually return a node, but this is only important for language bindings,
+    // which will already know and hold a ref on the right node to return. Returning bool allows
+    // these methods to be more efficient since they don't need to return a ref
+    bool insertBefore(PassRefPtr<Node> newChild, Node* refChild, ExceptionCode&, bool shouldLazyAttach = false);
+    bool replaceChild(PassRefPtr<Node> newChild, Node* oldChild, ExceptionCode&, bool shouldLazyAttach = false);
+    bool removeChild(Node* child, ExceptionCode&);
+    bool appendChild(PassRefPtr<Node> newChild, ExceptionCode&, bool shouldLazyAttach = false);
+
+    void remove(ExceptionCode&);
+    bool hasChildNodes() const { return firstChild(); }
+    virtual PassRefPtr<Node> cloneNode(bool deep) = 0;
+    const AtomicString& localName() const { return virtualLocalName(); }
+    const AtomicString& namespaceURI() const { return virtualNamespaceURI(); }
+    const AtomicString& prefix() const { return virtualPrefix(); }
+    virtual void setPrefix(const AtomicString&, ExceptionCode&);
+    void normalize();
+
+    bool isSameNode(Node* other) const { return this == other; }
+    bool isEqualNode(Node*) const;
+    bool isDefaultNamespace(const AtomicString& namespaceURI) const;
+    String lookupPrefix(const AtomicString& namespaceURI) const;
+    String lookupNamespaceURI(const String& prefix) const;
+    String lookupNamespacePrefix(const AtomicString& namespaceURI, const Element* originalElement) const;
+    
+    String textContent(bool convertBRsToNewlines = false) const;
+    void setTextContent(const String&, ExceptionCode&);
+    
+    Node* lastDescendant() const;
+    Node* firstDescendant() const;
+    
+    // Other methods (not part of DOM)
+
+    bool isElementNode() const { return getFlag(IsElementFlag); }
+    bool isContainerNode() const { return getFlag(IsContainerFlag); }
+    bool isTextNode() const { return getFlag(IsTextFlag); }
+
+    bool isHTMLElement() const { return getFlag(IsHTMLFlag); }
+
+    bool isSVGElement() const { return getFlag(IsSVGFlag); }
+
+#if ENABLE(WML)
+    virtual bool isWMLElement() const { return false; }
+#else
+    static bool isWMLElement() { return false; }
+#endif
+
+    virtual bool isMediaControlElement() const { return false; }
+    bool isStyledElement() const { return getFlag(IsStyledElementFlag); }
+    virtual bool isFrameOwnerElement() const { return false; }
+    virtual bool isAttributeNode() const { return false; }
+    bool isCommentNode() const { return getFlag(IsCommentFlag); }
+    virtual bool isCharacterDataNode() const { return false; }
+    bool isDocumentNode() const;
+    bool isShadowRoot() const { return getFlag(IsShadowRootFlag); }
+    Node* shadowAncestorNode();
+    Node* shadowTreeRootNode();
+    bool isInShadowTree();
+    // Node's parent or shadow tree host.
+    ContainerNode* parentOrHostNode() const;
+    // Use when it's guaranteed to that shadowHost is 0.
+    ContainerNode* parentNodeGuaranteedHostFree() const;
+
+    Element* shadowHost() const;
+    void setShadowHost(Element*);
+
+    // Returns the enclosing event parent node (or self) that, when clicked, would trigger a navigation.
+    Node* enclosingLinkEventParentOrSelf();
+
+    // Node ancestors when concerned about event flow.
+    void getEventAncestors(Vector<EventContext>& ancestors, EventTarget*, EventDispatchBehavior = RetargetEvent);
+
+    bool isBlockFlow() const;
+    bool isBlockFlowOrBlockTable() const;
+    
+    // These low-level calls give the caller responsibility for maintaining the integrity of the tree.
+    void setPreviousSibling(Node* previous) { m_previous = previous; }
+    void setNextSibling(Node* next) { m_next = next; }
+
+    // FIXME: These two functions belong in editing -- "atomic node" is an editing concept.
+    Node* previousNodeConsideringAtomicNodes() const;
+    Node* nextNodeConsideringAtomicNodes() const;
+    
+    // Returns the next leaf node or 0 if there are no more.
+    // Delivers leaf nodes as if the whole DOM tree were a linear chain of its leaf nodes.
+    // Uses an editing-specific concept of what a leaf node is, and should probably be moved
+    // out of the Node class into an editing-specific source file.
+    Node* nextLeafNode() const;
+
+    // Returns the previous leaf node or 0 if there are no more.
+    // Delivers leaf nodes as if the whole DOM tree were a linear chain of its leaf nodes.
+    // Uses an editing-specific concept of what a leaf node is, and should probably be moved
+    // out of the Node class into an editing-specific source file.
+    Node* previousLeafNode() const;
+
+    // enclosingBlockFlowElement() is deprecated. Use enclosingBlock instead.
+    Element* enclosingBlockFlowElement() const;
+    
+    Element* rootEditableElement() const;
+    
+    bool inSameContainingBlockFlowElement(Node*);
+
+    // FIXME: All callers of this function are almost certainly wrong!
+    virtual void deprecatedParserAddChild(PassRefPtr<Node>);
+
+    // Called by the parser when this element's close tag is reached,
+    // signaling that all child tags have been parsed and added.
+    // This is needed for <applet> and <object> elements, which can't lay themselves out
+    // until they know all of their nested <param>s. [Radar 3603191, 4040848].
+    // Also used for script elements and some SVG elements for similar purposes,
+    // but making parsing a special case in this respect should be avoided if possible.
+    virtual void finishParsingChildren() { }
+    virtual void beginParsingChildren() { }
+
+    // Called on the focused node right before dispatching an unload event.
+    virtual void aboutToUnload() { }
+
+    // For <link> and <style> elements.
+    virtual bool sheetLoaded() { return true; }
+
+    bool hasID() const { return getFlag(HasIDFlag); }
+    bool hasClass() const { return getFlag(HasClassFlag); }
+    bool active() const { return getFlag(IsActiveFlag); }
+    bool inActiveChain() const { return getFlag(InActiveChainFlag); }
+    bool inDetach() const { return getFlag(InDetachFlag); }
+    bool hovered() const { return getFlag(IsHoveredFlag); }
+    bool focused() const { return hasRareData() ? rareDataFocused() : false; }
+    bool attached() const { return getFlag(IsAttachedFlag); }
+    void setAttached() { setFlag(IsAttachedFlag); }
+    bool needsStyleRecalc() const { return styleChangeType() != NoStyleChange; }
+    StyleChangeType styleChangeType() const { return static_cast<StyleChangeType>(m_nodeFlags & StyleChangeMask); }
+    bool childNeedsStyleRecalc() const { return getFlag(ChildNeedsStyleRecalcFlag); }
+    bool isLink() const { return getFlag(IsLinkFlag); }
+
+    void setHasID(bool f) { setFlag(f, HasIDFlag); }
+    void setHasClass(bool f) { setFlag(f, HasClassFlag); }
+    void setChildNeedsStyleRecalc() { setFlag(ChildNeedsStyleRecalcFlag); }
+    void clearChildNeedsStyleRecalc() { clearFlag(ChildNeedsStyleRecalcFlag); }
+    void setInDocument() { setFlag(InDocumentFlag); }
+    void clearInDocument() { clearFlag(InDocumentFlag); }
+
+    void setInActiveChain() { setFlag(InActiveChainFlag); }
+    void clearInActiveChain() { clearFlag(InActiveChainFlag); }
+
+    void setNeedsStyleRecalc(StyleChangeType changeType = FullStyleChange);
+    void clearNeedsStyleRecalc() { m_nodeFlags &= ~StyleChangeMask; }
+
+    void setIsLink(bool f) { setFlag(f, IsLinkFlag); }
+    void setIsLink() { setFlag(IsLinkFlag); }
+    void clearIsLink() { clearFlag(IsLinkFlag); }
+
+    enum ShouldSetAttached {
+        SetAttached,
+        DoNotSetAttached
+    };
+    void lazyAttach(ShouldSetAttached = SetAttached);
+
+    virtual void setFocus(bool = true);
+    virtual void setActive(bool f = true, bool /*pause*/ = false) { setFlag(f, IsActiveFlag); }
+    virtual void setHovered(bool f = true) { setFlag(f, IsHoveredFlag); }
+
+    virtual short tabIndex() const;
+
+    // Whether this kind of node can receive focus by default. Most nodes are
+    // not focusable but some elements, such as form controls and links, are.
+    virtual bool supportsFocus() const;
+    // Whether the node can actually be focused.
+    virtual bool isFocusable() const;
+    virtual bool isKeyboardFocusable(KeyboardEvent*) const;
+    virtual bool isMouseFocusable() const;
+
+    virtual bool isContentEditable() const;
+    virtual bool isContentRichlyEditable() const;
+    virtual bool shouldUseInputMethod() const;
+    virtual IntRect getRect() const;
+    IntRect renderRect(bool* isReplaced);
+
+    // Returns true if the node has a non-empty bounding box in layout.
+    // This does not 100% guarantee the user can see it, but is pretty close.
+    // Note: This method only works properly after layout has occurred.
+    bool hasNonEmptyBoundingBox() const;
+
+    virtual void recalcStyle(StyleChange = NoChange) { }
+
+    unsigned nodeIndex() const;
+
+    // Returns the DOM ownerDocument attribute. This method never returns NULL, except in the case 
+    // of (1) a Document node or (2) a DocumentType node that is not used with any Document yet. 
+    virtual Document* ownerDocument() const;
+
+    // Returns the document associated with this node. This method never returns NULL, except in the case 
+    // of a DocumentType node that is not used with any Document yet. A Document node returns itself.
+    Document* document() const
+    {
+        ASSERT(this);
+        ASSERT(m_document || (nodeType() == DOCUMENT_TYPE_NODE && !inDocument()));
+        return m_document;
+    }
+
+    // Do not use this method to change the document of a node until after the node has been
+    // removed from its previous document.
+    void setDocument(Document*);
+
+    // Returns true if this node is associated with a document and is in its associated document's
+    // node tree, false otherwise.
+    bool inDocument() const 
+    { 
+        ASSERT(m_document || !getFlag(InDocumentFlag));
+        return getFlag(InDocumentFlag);
+    }
+
+    bool isReadOnlyNode() const { return nodeType() == ENTITY_REFERENCE_NODE; }
+    virtual bool childTypeAllowed(NodeType) { return false; }
+    unsigned childNodeCount() const;
+    Node* childNode(unsigned index) const;
+
+    // Does a pre-order traversal of the tree to find the next node after this one.
+    // This uses the same order that tags appear in the source file. If the stayWithin
+    // argument is non-null, the traversal will stop once the specified node is reached.
+    // This can be used to restrict traversal to a particular sub-tree.
+    Node* traverseNextNode(const Node* stayWithin = 0) const;
+    
+    // Like traverseNextNode, but skips children and starts with the next sibling.
+    Node* traverseNextSibling(const Node* stayWithin = 0) const;
+
+    // Does a reverse pre-order traversal to find the node that comes before the current one in document order
+    Node* traversePreviousNode(const Node* stayWithin = 0) const;
+
+    // Like traverseNextNode, but visits parents after their children.
+    Node* traverseNextNodePostOrder() const;
+
+    // Like traversePreviousNode, but visits parents before their children.
+    Node* traversePreviousNodePostOrder(const Node* stayWithin = 0) const;
+    Node* traversePreviousSiblingPostOrder(const Node* stayWithin = 0) const;
+
+    void checkSetPrefix(const AtomicString& prefix, ExceptionCode&);
+    bool isDescendantOf(const Node*) const;
+    bool contains(const Node*) const;
+    bool containsIncludingShadowDOM(Node*);
+
+    // This method is used to do strict error-checking when adding children via
+    // the public DOM API (e.g., appendChild()).
+    void checkAddChild(Node* newChild, ExceptionCode&); // Error-checking when adding via the DOM API
+
+    void checkReplaceChild(Node* newChild, Node* oldChild, ExceptionCode&);
+    virtual bool canReplaceChild(Node* newChild, Node* oldChild);
+    
+    // Used to determine whether range offsets use characters or node indices.
+    virtual bool offsetInCharacters() const;
+    // Number of DOM 16-bit units contained in node. Note that rendered text length can be different - e.g. because of
+    // css-transform:capitalize breaking up precomposed characters and ligatures.
+    virtual int maxCharacterOffset() const;
+    
+    // FIXME: We should try to find a better location for these methods.
+    virtual bool canSelectAll() const { return false; }
+    virtual void selectAll() { }
+
+    // Whether or not a selection can be started in this object
+    virtual bool canStartSelection() const;
+
+    // Getting points into and out of screen space
+    FloatPoint convertToPage(const FloatPoint&) const;
+    FloatPoint convertFromPage(const FloatPoint&) const;
+
+    // -----------------------------------------------------------------------------
+    // Integration with rendering tree
+
+    RenderObject* renderer() const { return m_renderer; }
+    RenderObject* nextRenderer();
+    RenderObject* previousRenderer();
+    void setRenderer(RenderObject* renderer) { m_renderer = renderer; }
+    
+    // Use these two methods with caution.
+    RenderBox* renderBox() const;
+    RenderBoxModelObject* renderBoxModelObject() const;
+
+    // Attaches this node to the rendering tree. This calculates the style to be applied to the node and creates an
+    // appropriate RenderObject which will be inserted into the tree (except when the style has display: none). This
+    // makes the node visible in the FrameView.
+    virtual void attach();
+
+    // Detaches the node from the rendering tree, making it invisible in the rendered view. This method will remove
+    // the node's rendering object from the rendering tree and delete it.
+    virtual void detach();
+
+    virtual void willRemove();
+    void createRendererIfNeeded();
+    PassRefPtr<RenderStyle> styleForRenderer();
+    virtual bool rendererIsNeeded(RenderStyle*);
+    virtual bool childShouldCreateRenderer(Node*) const { return true; }
+    virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
+    
+    // Wrapper for nodes that don't have a renderer, but still cache the style (like HTMLOptionElement).
+    RenderStyle* renderStyle() const;
+    virtual void setRenderStyle(PassRefPtr<RenderStyle>);
+
+    RenderStyle* computedStyle(PseudoId pseudoElementSpecifier = NOPSEUDO) { return virtualComputedStyle(pseudoElementSpecifier); }
+
+    // -----------------------------------------------------------------------------
+    // Notification of document structure changes
+
+    // Notifies the node that it has been inserted into the document. This is called during document parsing, and also
+    // when a node is added through the DOM methods insertBefore(), appendChild() or replaceChild(). Note that this only
+    // happens when the node becomes part of the document tree, i.e. only when the document is actually an ancestor of
+    // the node. The call happens _after_ the node has been added to the tree.
+    //
+    // This is similar to the DOMNodeInsertedIntoDocument DOM event, but does not require the overhead of event
+    // dispatching.
+    virtual void insertedIntoDocument();
+
+    // Notifies the node that it is no longer part of the document tree, i.e. when the document is no longer an ancestor
+    // node.
+    //
+    // This is similar to the DOMNodeRemovedFromDocument DOM event, but does not require the overhead of event
+    // dispatching, and is called _after_ the node is removed from the tree.
+    virtual void removedFromDocument();
+
+    // These functions are called whenever you are connected or disconnected from a tree.  That tree may be the main
+    // document tree, or it could be another disconnected tree.  Override these functions to do any work that depends
+    // on connectedness to some ancestor (e.g., an ancestor <form> for example).
+    virtual void insertedIntoTree(bool /*deep*/) { }
+    virtual void removedFromTree(bool /*deep*/) { }
+
+    // Notifies the node that it's list of children have changed (either by adding or removing child nodes), or a child
+    // node that is of the type CDATA_SECTION_NODE, TEXT_NODE or COMMENT_NODE has changed its value.
+    virtual void childrenChanged(bool /*changedByParser*/ = false, Node* /*beforeChange*/ = 0, Node* /*afterChange*/ = 0, int /*childCountDelta*/ = 0) { }
+
+#if !defined(NDEBUG) || defined(ANDROID_DOM_LOGGING)
+    virtual void formatForDebugger(char* buffer, unsigned length) const;
+
+    void showNode(const char* prefix = "") const;
+    void showTreeForThis() const;
+    void showTreeAndMark(const Node* markedNode1, const char* markedLabel1, const Node* markedNode2 = 0, const char* markedLabel2 = 0) const;
+#endif
+
+    void registerDynamicNodeList(DynamicNodeList*);
+    void unregisterDynamicNodeList(DynamicNodeList*);
+    void notifyNodeListsChildrenChanged();
+    void notifyLocalNodeListsChildrenChanged();
+    void notifyNodeListsAttributeChanged();
+    void notifyLocalNodeListsAttributeChanged();
+    void notifyLocalNodeListsLabelChanged();
+    void removeCachedClassNodeList(ClassNodeList*, const String&);
+    void removeCachedNameNodeList(NameNodeList*, const String&);
+    void removeCachedTagNodeList(TagNodeList*, const QualifiedName&);
+    void removeCachedLabelsNodeList(DynamicNodeList*);
+    
+    PassRefPtr<NodeList> getElementsByTagName(const AtomicString&);
+    PassRefPtr<NodeList> getElementsByTagNameNS(const AtomicString& namespaceURI, const AtomicString& localName);
+    PassRefPtr<NodeList> getElementsByName(const String& elementName);
+    PassRefPtr<NodeList> getElementsByClassName(const String& classNames);
+
+    PassRefPtr<Element> querySelector(const String& selectors, ExceptionCode&);
+    PassRefPtr<NodeList> querySelectorAll(const String& selectors, ExceptionCode&);
+
+    unsigned short compareDocumentPosition(Node*);
+
+#ifdef ANDROID_INSTRUMENT
+    // Overridden to prevent the normal new from being called.
+    void* operator new(size_t size);
+    void* operator new[](size_t size);
+
+    // Overridden to prevent the normal delete from being called.
+    void operator delete(void* p, size_t size);
+    void operator delete[](void* p, size_t size);
+
+    static size_t reportDOMNodesSize();
+#endif
+
+    virtual Node* toNode() { return this; }
+
+    virtual ScriptExecutionContext* scriptExecutionContext() const;
+
+    virtual bool addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture);
+    virtual bool removeEventListener(const AtomicString& eventType, EventListener*, bool useCapture);
+
+    // Handlers to do/undo actions on the target node before an event is dispatched to it and after the event
+    // has been dispatched.  The data pointer is handed back by the preDispatch and passed to postDispatch.
+    virtual void* preDispatchEventHandler(Event*) { return 0; }
+    virtual void postDispatchEventHandler(Event*, void* /*dataFromPreDispatch*/) { }
+
+    using EventTarget::dispatchEvent;
+    bool dispatchEvent(PassRefPtr<Event>);
+    void dispatchScopedEvent(PassRefPtr<Event>);
+
+    bool dispatchGenericEvent(PassRefPtr<Event>);
+    virtual void handleLocalEvents(Event*);
+
+    void dispatchSubtreeModifiedEvent();
+    void dispatchUIEvent(const AtomicString& eventType, int detail, PassRefPtr<Event> underlyingEvent);
+    bool dispatchKeyEvent(const PlatformKeyboardEvent&);
+    void dispatchWheelEvent(PlatformWheelEvent&);
+    bool dispatchMouseEvent(const PlatformMouseEvent&, const AtomicString& eventType, int clickCount = 0, Node* relatedTarget = 0);
+    bool dispatchMouseEvent(const AtomicString& eventType, int button, int clickCount,
+        int pageX, int pageY, int screenX, int screenY,
+        bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
+        bool isSimulated, Node* relatedTarget, PassRefPtr<Event> underlyingEvent);
+    void dispatchSimulatedMouseEvent(const AtomicString& eventType, PassRefPtr<Event> underlyingEvent);
+    void dispatchSimulatedClick(PassRefPtr<Event> underlyingEvent, bool sendMouseEvents = false, bool showPressedLook = true);
+
+    virtual void dispatchFocusEvent();
+    virtual void dispatchBlurEvent();
+
+    // Perform the default action for an event.
+    virtual void defaultEventHandler(Event*);
+
+    // Used for disabled form elements; if true, prevents mouse events from being dispatched
+    // to event listeners, and prevents DOMActivate events from being sent at all.
+    virtual bool disabled() const;
+
+    using TreeShared<ContainerNode>::ref;
+    using TreeShared<ContainerNode>::deref;
+
+    virtual EventTargetData* eventTargetData();
+    virtual EventTargetData* ensureEventTargetData();
+
+#if USE(JSC)
+    void markCachedNodeLists(JSC::MarkStack& markStack, JSC::JSGlobalData& globalData)
+    {
+        // NodeLists may be present.  If so, they need to be marked.
+        if (!hasRareData())
+            return;
+
+        markCachedNodeListsSlow(markStack, globalData);
+    }
+#endif
+
+private:
+    enum NodeFlags {
+        IsTextFlag = 1,
+        IsCommentFlag = 1 << 1,
+        IsContainerFlag = 1 << 2,
+        IsElementFlag = 1 << 3,
+        IsStyledElementFlag = 1 << 4,
+        IsHTMLFlag = 1 << 5,
+        IsSVGFlag = 1 << 6,
+        HasIDFlag = 1 << 7,
+        HasClassFlag = 1 << 8,
+        IsAttachedFlag = 1 << 9,
+        ChildNeedsStyleRecalcFlag = 1 << 10,
+        InDocumentFlag = 1 << 11,
+        IsLinkFlag = 1 << 12,
+        IsActiveFlag = 1 << 13,
+        IsHoveredFlag = 1 << 14,
+        InActiveChainFlag = 1 << 15,
+        InDetachFlag = 1 << 16,
+        HasRareDataFlag = 1 << 17,
+        IsShadowRootFlag = 1 << 18,
+
+        // These bits are used by derived classes, pulled up here so they can
+        // be stored in the same memory word as the Node bits above.
+        IsParsingChildrenFinishedFlag = 1 << 19, // Element
+        IsStyleAttributeValidFlag = 1 << 20, // StyledElement
+        IsSynchronizingStyleAttributeFlag = 1 << 21, // StyledElement
+#if ENABLE(SVG)
+        AreSVGAttributesValidFlag = 1 << 22, // Element
+        IsSynchronizingSVGAttributesFlag = 1 << 23, // SVGElement
+        HasSVGRareDataFlag = 1 << 24, // SVGElement
+#endif
+
+        StyleChangeMask = 1 << nodeStyleChangeShift | 1 << (nodeStyleChangeShift + 1),
+
+#if ENABLE(SVG)
+        DefaultNodeFlags = IsParsingChildrenFinishedFlag | IsStyleAttributeValidFlag | AreSVGAttributesValidFlag
+#else
+        DefaultNodeFlags = IsParsingChildrenFinishedFlag | IsStyleAttributeValidFlag
+#endif
+    };
+
+    // 4 bits remaining
+
+    bool getFlag(NodeFlags mask) const { return m_nodeFlags & mask; }
+    void setFlag(bool f, NodeFlags mask) const { m_nodeFlags = (m_nodeFlags & ~mask) | (-(int32_t)f & mask); } 
+    void setFlag(NodeFlags mask) const { m_nodeFlags |= mask; } 
+    void clearFlag(NodeFlags mask) const { m_nodeFlags &= ~mask; } 
+
+protected:
+    enum ConstructionType { 
+        CreateOther = DefaultNodeFlags,
+        CreateText = DefaultNodeFlags | IsTextFlag,
+        CreateComment = DefaultNodeFlags | IsCommentFlag,
+        CreateContainer = DefaultNodeFlags | IsContainerFlag, 
+        CreateElement = CreateContainer | IsElementFlag, 
+        CreateStyledElement = CreateElement | IsStyledElementFlag, 
+        CreateHTMLElement = CreateStyledElement | IsHTMLFlag, 
+        CreateSVGElement = CreateStyledElement | IsSVGFlag, 
+    };
+    Node(Document*, ConstructionType);
+
+    virtual void willMoveToNewOwnerDocument();
+    virtual void didMoveToNewOwnerDocument();
+    
+    virtual void addSubresourceAttributeURLs(ListHashSet<KURL>&) const { }
+    void setTabIndexExplicitly(short);
+    
+    bool hasRareData() const { return getFlag(HasRareDataFlag); }
+
+    NodeRareData* rareData() const;
+    NodeRareData* ensureRareData();
+
+private:
+#if USE(JSC)
+    void markCachedNodeListsSlow(JSC::MarkStack&, JSC::JSGlobalData&);
+#endif
+
+    void setStyleChange(StyleChangeType);
+
+    // Used to share code between lazyAttach and setNeedsStyleRecalc.
+    void markAncestorsWithChildNeedsStyleRecalc();
+
+    virtual void refEventTarget();
+    virtual void derefEventTarget();
+
+    virtual NodeRareData* createRareData();
+    bool rareDataFocused() const;
+
+    virtual RenderStyle* nonRendererRenderStyle() const;
+
+    virtual const AtomicString& virtualPrefix() const;
+    virtual const AtomicString& virtualLocalName() const;
+    virtual const AtomicString& virtualNamespaceURI() const;
+    virtual RenderStyle* virtualComputedStyle(PseudoId = NOPSEUDO);
+
+    Element* ancestorElement() const;
+
+    // Use Node::parentNode as the consistent way of querying a parent node.
+    // This method is made private to ensure a compiler error on call sites that
+    // don't follow this rule.
+    using TreeShared<ContainerNode>::parent;
+
+    void trackForDebugging();
+
+    Document* m_document;
+    Node* m_previous;
+    Node* m_next;
+    RenderObject* m_renderer;
+    mutable uint32_t m_nodeFlags;
+
+protected:
+    bool isParsingChildrenFinished() const { return getFlag(IsParsingChildrenFinishedFlag); }
+    void setIsParsingChildrenFinished() { setFlag(IsParsingChildrenFinishedFlag); }
+    void clearIsParsingChildrenFinished() { clearFlag(IsParsingChildrenFinishedFlag); }
+    bool isStyleAttributeValid() const { return getFlag(IsStyleAttributeValidFlag); }
+    void setIsStyleAttributeValid(bool f) { setFlag(f, IsStyleAttributeValidFlag); }
+    void setIsStyleAttributeValid() const { setFlag(IsStyleAttributeValidFlag); }
+    void clearIsStyleAttributeValid() { clearFlag(IsStyleAttributeValidFlag); }
+    bool isSynchronizingStyleAttribute() const { return getFlag(IsSynchronizingStyleAttributeFlag); }
+    void setIsSynchronizingStyleAttribute(bool f) { setFlag(f, IsSynchronizingStyleAttributeFlag); }
+    void setIsSynchronizingStyleAttribute() const { setFlag(IsSynchronizingStyleAttributeFlag); }
+    void clearIsSynchronizingStyleAttribute() const { clearFlag(IsSynchronizingStyleAttributeFlag); }
+
+#if ENABLE(SVG)
+    bool areSVGAttributesValid() const { return getFlag(AreSVGAttributesValidFlag); }
+    void setAreSVGAttributesValid() const { setFlag(AreSVGAttributesValidFlag); }
+    void clearAreSVGAttributesValid() { clearFlag(AreSVGAttributesValidFlag); }
+    bool isSynchronizingSVGAttributes() const { return getFlag(IsSynchronizingSVGAttributesFlag); }
+    void setIsSynchronizingSVGAttributes() const { setFlag(IsSynchronizingSVGAttributesFlag); }
+    void clearIsSynchronizingSVGAttributes() const { clearFlag(IsSynchronizingSVGAttributesFlag); }
+    bool hasRareSVGData() const { return getFlag(HasSVGRareDataFlag); }
+    void setHasRareSVGData() { setFlag(HasSVGRareDataFlag); }
+    void clearHasRareSVGData() { clearFlag(HasSVGRareDataFlag); }
+#endif
+};
+
+// Used in Node::addSubresourceAttributeURLs() and in addSubresourceStyleURLs()
+inline void addSubresourceURL(ListHashSet<KURL>& urls, const KURL& url)
+{
+    if (!url.isNull())
+        urls.add(url);
+}
+
+inline ContainerNode* Node::parentNode() const
+{
+    return getFlag(IsShadowRootFlag) ? 0 : parent();
+}
+
+inline ContainerNode* Node::parentOrHostNode() const
+{
+    return parent();
+}
+
+inline ContainerNode* Node::parentNodeGuaranteedHostFree() const
+{
+    ASSERT(!getFlag(IsShadowRootFlag));
+    return parentOrHostNode();
+}
+
+} //namespace
+
+#ifndef NDEBUG
+// Outside the WebCore namespace for ease of invocation from gdb.
+void showTree(const WebCore::Node*);
+#endif
+
+#endif