gecko/parser/html/nsHtml5TreeBuilderCppSupplement.h

571 lines
20 KiB
C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=78: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
* Henri Sivonen <hsivonen@iki.fi>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsContentErrors.h"
#include "nsContentCreatorFunctions.h"
#include "nsIDOMDocumentType.h"
#include "nsIPresShell.h"
#include "nsPresContext.h"
#include "nsEvent.h"
#include "nsGUIEvent.h"
#include "nsEventDispatcher.h"
#include "nsContentUtils.h"
#include "nsIDOMHTMLFormElement.h"
#include "nsIFormControl.h"
#include "nsNodeUtils.h"
#include "nsIStyleSheetLinkingElement.h"
#include "nsTraceRefcnt.h"
#include "mozAutoDocUpdate.h"
#include "nsIScriptElement.h"
#define NS_HTML5_TREE_BUILDER_MAX_QUEUE_TIME 3000UL // milliseconds
#define NS_HTML5_TREE_BUILDER_DEFAULT_QUEUE_LENGTH 200
#define NS_HTML5_TREE_BUILDER_MIN_QUEUE_LENGTH 100
#define NS_HTML5_TREE_BUILDER_MAX_TIME_WITHOUT_FLUSH 5000 // milliseconds
// this really should be autogenerated...
jArray<PRUnichar,PRInt32> nsHtml5TreeBuilder::ISINDEX_PROMPT = jArray<PRUnichar,PRInt32>();
nsHtml5TreeBuilder::nsHtml5TreeBuilder(nsHtml5Parser* aParser)
: parser(aParser)
, scriptingEnabled(PR_FALSE)
, fragment(PR_FALSE)
, contextNode(nsnull)
, formPointer(nsnull)
, headPointer(nsnull)
, mNeedsFlush(PR_FALSE)
, mFlushTimer(do_CreateInstance("@mozilla.org/timer;1"))
, mHasProcessedBase(PR_FALSE)
#ifdef DEBUG
, mActive(PR_FALSE)
#endif
{
MOZ_COUNT_CTOR(nsHtml5TreeBuilder);
}
nsHtml5TreeBuilder::~nsHtml5TreeBuilder()
{
MOZ_COUNT_DTOR(nsHtml5TreeBuilder);
NS_ASSERTION(!mActive, "nsHtml5TreeBuilder deleted without ever calling end() on it!");
mOpQueue.Clear();
if (mFlushTimer) {
mFlushTimer->Cancel(); // XXX why is this even necessary? it is, though.
}
}
nsIContent*
nsHtml5TreeBuilder::createElement(PRInt32 aNamespace, nsIAtom* aName, nsHtml5HtmlAttributes* aAttributes)
{
nsIContent* newContent;
nsCOMPtr<nsINodeInfo> nodeInfo = parser->GetNodeInfoManager()->GetNodeInfo(aName, nsnull, aNamespace);
NS_ASSERTION(nodeInfo, "Got null nodeinfo.");
NS_NewElement(&newContent, nodeInfo->NamespaceID(), nodeInfo, PR_TRUE);
NS_ASSERTION(newContent, "Element creation created null pointer.");
PRInt32 len = aAttributes->getLength();
for (PRInt32 i = 0; i < len; ++i) {
newContent->SetAttr(aAttributes->getURI(i), aAttributes->getLocalName(i), aAttributes->getPrefix(i), *(aAttributes->getValue(i)), PR_FALSE);
// XXX what to do with nsresult?
}
if (aNamespace != kNameSpaceID_MathML && (aName == nsHtml5Atoms::style || (aNamespace == kNameSpaceID_XHTML && aName == nsHtml5Atoms::link))) {
nsCOMPtr<nsIStyleSheetLinkingElement> ssle(do_QueryInterface(newContent));
if (ssle) {
ssle->InitStyleLinkElement(PR_FALSE);
ssle->SetEnableUpdates(PR_FALSE);
#if 0
if (!aNodeInfo->Equals(nsGkAtoms::link, kNameSpaceID_XHTML)) {
ssle->SetLineNumber(aLineNumber);
}
#endif
}
}
return newContent;
}
nsIContent*
nsHtml5TreeBuilder::createElement(PRInt32 aNamespace, nsIAtom* aName, nsHtml5HtmlAttributes* aAttributes, nsIContent* aFormElement)
{
nsIContent* content = createElement(aNamespace, aName, aAttributes);
if (aFormElement) {
nsCOMPtr<nsIFormControl> formControl(do_QueryInterface(content));
NS_ASSERTION(formControl, "Form-associated element did not implement nsIFormControl.");
nsCOMPtr<nsIDOMHTMLFormElement> formElement(do_QueryInterface(aFormElement));
NS_ASSERTION(formElement, "The form element doesn't implement nsIDOMHTMLFormElement.");
if (formControl) { // avoid crashing on <output>
formControl->SetForm(formElement);
}
}
return content;
}
nsIContent*
nsHtml5TreeBuilder::createHtmlElementSetAsRoot(nsHtml5HtmlAttributes* aAttributes)
{
nsIContent* content = createElement(kNameSpaceID_XHTML, nsHtml5Atoms::html, aAttributes);
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpAppendToDocument, content);
return content;
}
void
nsHtml5TreeBuilder::detachFromParent(nsIContent* aElement)
{
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpDetach, aElement);
}
nsIContent*
nsHtml5TreeBuilder::shallowClone(nsIContent* aElement)
{
nsINode* clone;
aElement->Clone(aElement->NodeInfo(), &clone);
// XXX nsresult
NS_ASSERTION(clone->IsNodeOfType(nsINode::eCONTENT), "Cloning an element didn't yield a content node.");
return static_cast<nsIContent*>(clone);
}
void
nsHtml5TreeBuilder::appendElement(nsIContent* aChild, nsIContent* aParent)
{
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(aChild, aParent);
}
void
nsHtml5TreeBuilder::appendChildrenToNewParent(nsIContent* aOldParent, nsIContent* aNewParent)
{
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpAppendChildrenToNewParent, aOldParent, aNewParent);
}
void
nsHtml5TreeBuilder::insertFosterParentedCharacters(PRUnichar* aBuffer, PRInt32 aStart, PRInt32 aLength, nsIContent* aTable, nsIContent* aStackParent)
{
nsCOMPtr<nsIContent> text;
NS_NewTextNode(getter_AddRefs(text), parser->GetNodeInfoManager());
// XXX nsresult and comment null check?
text->SetText(aBuffer + aStart, aLength, PR_FALSE);
// XXX nsresult
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpFosterParent, text, aStackParent, aTable);
}
void
nsHtml5TreeBuilder::insertFosterParentedChild(nsIContent* aChild, nsIContent* aTable, nsIContent* aStackParent)
{
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpFosterParent, aChild, aStackParent, aTable);
}
void
nsHtml5TreeBuilder::appendCharacters(nsIContent* aParent, PRUnichar* aBuffer, PRInt32 aStart, PRInt32 aLength)
{
nsCOMPtr<nsIContent> text;
NS_NewTextNode(getter_AddRefs(text), parser->GetNodeInfoManager());
// XXX nsresult and comment null check?
text->SetText(aBuffer + aStart, aLength, PR_FALSE);
// XXX nsresult
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(text, aParent);
}
void
nsHtml5TreeBuilder::appendComment(nsIContent* aParent, PRUnichar* aBuffer, PRInt32 aStart, PRInt32 aLength)
{
nsCOMPtr<nsIContent> comment;
NS_NewCommentNode(getter_AddRefs(comment), parser->GetNodeInfoManager());
// XXX nsresult and comment null check?
comment->SetText(aBuffer + aStart, aLength, PR_FALSE);
// XXX nsresult
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(comment, aParent);
}
void
nsHtml5TreeBuilder::appendCommentToDocument(PRUnichar* aBuffer, PRInt32 aStart, PRInt32 aLength)
{
nsCOMPtr<nsIContent> comment;
NS_NewCommentNode(getter_AddRefs(comment), parser->GetNodeInfoManager());
// XXX nsresult and comment null check?
comment->SetText(aBuffer + aStart, aLength, PR_FALSE);
// XXX nsresult
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpAppendToDocument, comment);
}
void
nsHtml5TreeBuilder::addAttributesToElement(nsIContent* aElement, nsHtml5HtmlAttributes* aAttributes)
{
nsIContent* holder = createElement(kNameSpaceID_XHTML, nsHtml5Atoms::div, aAttributes);
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpAddAttributes, holder, aElement);
}
void
nsHtml5TreeBuilder::markMalformedIfScript(nsIContent* elt)
{
nsCOMPtr<nsIScriptElement> sele = do_QueryInterface(elt);
if (sele) {
// Make sure to serialize this script correctly, for nice round tripping.
sele->SetIsMalformed();
}
}
void
nsHtml5TreeBuilder::start(PRBool fragment)
{
// XXX check that timer creation didn't fail in constructor
if (fragment) {
mHasProcessedBase = PR_TRUE;
} else {
mHasProcessedBase = PR_FALSE;
parser->WillBuildModelImpl();
parser->GetDocument()->BeginLoad(); // XXX fragment?
}
mNeedsFlush = PR_FALSE;
#ifdef DEBUG
mActive = PR_TRUE;
#endif
}
void
nsHtml5TreeBuilder::end()
{
mFlushTimer->Cancel();
Flush();
#ifdef DEBUG
mActive = PR_FALSE;
#endif
#ifdef DEBUG_hsivonen
printf("MAX INSERTION BATCH LEN: %d\n", sInsertionBatchMaxLength);
printf("MAX NOTIFICATION BATCH LEN: %d\n", sAppendBatchMaxSize);
if (sAppendBatchExaminations != 0) {
printf("AVERAGE SLOTS EXAMINED: %d\n", sAppendBatchSlotsExamined / sAppendBatchExaminations);
}
#endif
}
void
nsHtml5TreeBuilder::appendDoctypeToDocument(nsIAtom* aName, nsString* aPublicId, nsString* aSystemId)
{
// Adapted from nsXMLContentSink
// Create a new doctype node
nsCOMPtr<nsIDOMDocumentType> docType;
nsAutoString voidString;
voidString.SetIsVoid(PR_TRUE);
NS_NewDOMDocumentType(getter_AddRefs(docType),
parser->GetNodeInfoManager(),
nsnull,
aName,
nsnull,
nsnull,
*aPublicId,
*aSystemId,
voidString);
NS_ASSERTION(docType, "Doctype creation failed.");
nsCOMPtr<nsIContent> content = do_QueryInterface(docType);
NS_ASSERTION(content, "doctype isn't content?");
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpAppendToDocument, content);
// nsXMLContentSink can flush here, but what's the point?
// It can also interrupt here, but we can't.
}
void
nsHtml5TreeBuilder::elementPushed(PRInt32 aNamespace, nsIAtom* aName, nsIContent* aElement)
{
NS_ASSERTION(aNamespace == kNameSpaceID_XHTML || aNamespace == kNameSpaceID_SVG || aNamespace == kNameSpaceID_MathML, "Element isn't HTML, SVG or MathML!");
NS_ASSERTION(aName, "Element doesn't have local name!");
NS_ASSERTION(aElement, "No element!");
// Give autoloading links a chance to fire
if (aNamespace == kNameSpaceID_XHTML) {
if (aName == nsHtml5Atoms::body) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpStartLayout, nsnull);
} else if (aName == nsHtml5Atoms::html) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpProcessOfflineManifest, aElement);
return;
}
}
#if 0
else {
nsIDocShell* docShell = parser->GetDocShell();
if (docShell) {
nsresult rv = aElement->MaybeTriggerAutoLink(docShell);
if (rv == NS_XML_AUTOLINK_REPLACE ||
rv == NS_XML_AUTOLINK_UNDEFINED) {
// If we do not terminate the parse, we just keep generating link trigger
// events. We want to parse only up to the first replace link, and stop.
parser->Terminate();
}
}
}
#endif
MaybeSuspend();
}
void
nsHtml5TreeBuilder::elementPopped(PRInt32 aNamespace, nsIAtom* aName, nsIContent* aElement)
{
NS_ASSERTION(aNamespace == kNameSpaceID_XHTML || aNamespace == kNameSpaceID_SVG || aNamespace == kNameSpaceID_MathML, "Element isn't HTML, SVG or MathML!");
NS_ASSERTION(aName, "Element doesn't have local name!");
NS_ASSERTION(aElement, "No element!");
MaybeSuspend();
if (aNamespace == kNameSpaceID_MathML) {
return;
}
// we now have only SVG and HTML
if (aName == nsHtml5Atoms::script) {
requestSuspension();
parser->SetScriptElement(aElement);
return;
}
if (aName == nsHtml5Atoms::title) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpDoneAddingChildren, aElement);
return;
}
if (aName == nsHtml5Atoms::style || (aNamespace == kNameSpaceID_XHTML && aName == nsHtml5Atoms::link)) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpUpdateStyleSheet, aElement);
return;
}
if (aNamespace == kNameSpaceID_SVG) {
#if 0
if (aElement->HasAttr(kNameSpaceID_None, nsHtml5Atoms::onload)) {
Flush();
nsEvent event(PR_TRUE, NS_SVG_LOAD);
event.eventStructType = NS_SVG_EVENT;
event.flags |= NS_EVENT_FLAG_CANT_BUBBLE;
// Do we care about forcing presshell creation if it hasn't happened yet?
// That is, should this code flush or something? Does it really matter?
// For that matter, do we really want to try getting the prescontext? Does
// this event ever want one?
nsRefPtr<nsPresContext> ctx;
nsCOMPtr<nsIPresShell> shell = parser->GetDocument()->GetPrimaryShell();
if (shell) {
ctx = shell->GetPresContext();
}
nsEventDispatcher::Dispatch(aElement, ctx, &event);
}
#endif
return;
}
// we now have only HTML
// Some HTML nodes need DoneAddingChildren() called to initialize
// properly (e.g. form state restoration).
// XXX expose ElementName group here and do switch
if (aName == nsHtml5Atoms::select ||
aName == nsHtml5Atoms::textarea ||
#ifdef MOZ_MEDIA
aName == nsHtml5Atoms::video ||
aName == nsHtml5Atoms::audio ||
#endif
aName == nsHtml5Atoms::object ||
aName == nsHtml5Atoms::applet) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpDoneAddingChildren, aElement);
return;
}
if (aName == nsHtml5Atoms::input ||
aName == nsHtml5Atoms::button) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpDoneCreatingElement, aElement);
return;
}
if (aName == nsHtml5Atoms::base) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpProcessBase, aElement);
return;
}
if (aName == nsHtml5Atoms::meta) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
// XXX if null, OOM!
treeOp->Init(eTreeOpProcessMeta, aElement);
return;
}
return;
}
void
nsHtml5TreeBuilder::accumulateCharacters(PRUnichar* aBuf, PRInt32 aStart, PRInt32 aLength)
{
PRInt32 newFillLen = charBufferLen + aLength;
if (newFillLen > charBuffer.length) {
PRInt32 newAllocLength = newFillLen + (newFillLen >> 1);
jArray<PRUnichar,PRInt32> newBuf(newAllocLength);
memcpy(newBuf, charBuffer, sizeof(PRUnichar) * charBufferLen);
charBuffer.release();
charBuffer = newBuf;
}
memcpy(charBuffer + charBufferLen, aBuf + aStart, sizeof(PRUnichar) * aLength);
charBufferLen = newFillLen;
}
static void
TimerCallbackFunc(nsITimer* aTimer, void* aClosure)
{
(static_cast<nsHtml5TreeBuilder*> (aClosure))->DeferredTimerFlush();
}
void
nsHtml5TreeBuilder::Flush()
{
mNeedsFlush = PR_FALSE;
MOZ_AUTO_DOC_UPDATE(parser->GetDocument(), UPDATE_CONTENT_MODEL, PR_TRUE);
PRIntervalTime flushStart = 0;
PRUint32 opQueueLength = mOpQueue.Length();
if (opQueueLength > NS_HTML5_TREE_BUILDER_MIN_QUEUE_LENGTH) { // avoid computing averages with too few ops
flushStart = PR_IntervalNow();
}
mElementsSeenInThisAppendBatch.SetCapacity(opQueueLength * 2);
// XXX alloc failure
const nsHtml5TreeOperation* start = mOpQueue.Elements();
const nsHtml5TreeOperation* end = start + opQueueLength;
for (nsHtml5TreeOperation* iter = (nsHtml5TreeOperation*)start; iter < end; ++iter) {
iter->Perform(this);
}
FlushPendingAppendNotifications();
#ifdef DEBUG_hsivonen
if (mOpQueue.Length() > sInsertionBatchMaxLength) {
sInsertionBatchMaxLength = opQueueLength;
}
#endif
mOpQueue.Clear();
if (flushStart) {
PRUint32 delta = PR_IntervalToMilliseconds(PR_IntervalNow() - flushStart);
sTreeOpQueueMaxLength = delta ?
(PRUint32)((NS_HTML5_TREE_BUILDER_MAX_QUEUE_TIME * (PRUint64)opQueueLength) / delta) :
0;
if (sTreeOpQueueMaxLength < NS_HTML5_TREE_BUILDER_MIN_QUEUE_LENGTH) {
sTreeOpQueueMaxLength = NS_HTML5_TREE_BUILDER_MIN_QUEUE_LENGTH;
}
#ifdef DEBUG_hsivonen
printf("QUEUE MAX LENGTH: %d\n", sTreeOpQueueMaxLength);
#endif
}
mFlushTimer->InitWithFuncCallback(TimerCallbackFunc, static_cast<void*> (this), NS_HTML5_TREE_BUILDER_MAX_TIME_WITHOUT_FLUSH, nsITimer::TYPE_ONE_SHOT);
}
void
nsHtml5TreeBuilder::DoUnlink()
{
nsHtml5TreeBuilder* tmp = this;
if (mFlushTimer) {
mFlushTimer->Cancel();
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mFlushTimer);
NS_IF_RELEASE(contextNode);
NS_IF_RELEASE(formPointer);
NS_IF_RELEASE(headPointer);
while (currentPtr > -1) {
stack[currentPtr]->release();
currentPtr--;
}
while (listPtr > -1) {
if (listOfActiveFormattingElements[listPtr]) {
listOfActiveFormattingElements[listPtr]->release();
}
listPtr--;
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSTARRAY(mOpQueue);
}
void
nsHtml5TreeBuilder::DoTraverse(nsCycleCollectionTraversalCallback &cb)
{
nsHtml5TreeBuilder* tmp = this;
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mFlushTimer);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(contextNode);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(formPointer);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(headPointer);
if (stack) {
for (PRInt32 i = 0; i <= currentPtr; i++) {
#ifdef DEBUG_CC
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "stack[i]");
#endif
cb.NoteNativeChild(stack[i], &NS_CYCLE_COLLECTION_NAME(nsHtml5StackNode));
}
}
if (listOfActiveFormattingElements) {
for (PRInt32 i = 0; i <= listPtr; i++) {
if (listOfActiveFormattingElements[i]) {
#ifdef DEBUG_CC
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "listOfActiveFormattingElements[i]");
#endif
cb.NoteNativeChild(listOfActiveFormattingElements[i], &NS_CYCLE_COLLECTION_NAME(nsHtml5StackNode));
}
}
}
const nsHtml5TreeOperation* start = mOpQueue.Elements();
const nsHtml5TreeOperation* end = start + mOpQueue.Length();
for (nsHtml5TreeOperation* iter = (nsHtml5TreeOperation*)start; iter < end; ++iter) {
#ifdef DEBUG_CC
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mOpQueue[i]");
#endif
iter->DoTraverse(cb);
}
}
#ifdef DEBUG_hsivonen
PRUint32 nsHtml5TreeBuilder::sInsertionBatchMaxLength = 0;
PRUint32 nsHtml5TreeBuilder::sAppendBatchMaxSize = 0;
PRUint32 nsHtml5TreeBuilder::sAppendBatchSlotsExamined = 0;
PRUint32 nsHtml5TreeBuilder::sAppendBatchExaminations = 0;
#endif
PRUint32 nsHtml5TreeBuilder::sTreeOpQueueMaxLength = NS_HTML5_TREE_BUILDER_DEFAULT_QUEUE_LENGTH;