gecko/parser/html/nsHtml5StreamParser.cpp

629 lines
22 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=2 et tw=79: */
/* ***** 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.org 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 "nsHtml5StreamParser.h"
#include "nsICharsetConverterManager.h"
#include "nsServiceManagerUtils.h"
#include "nsEncoderDecoderUtils.h"
#include "nsContentUtils.h"
#include "nsICharsetDetector.h"
#include "nsHtml5Tokenizer.h"
#include "nsIHttpChannel.h"
#include "nsHtml5Parser.h"
static NS_DEFINE_CID(kCharsetAliasCID, NS_CHARSETALIAS_CID);
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsHtml5StreamParser)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsHtml5StreamParser)
NS_INTERFACE_TABLE_HEAD(nsHtml5StreamParser)
NS_INTERFACE_TABLE2(nsHtml5StreamParser,
nsIStreamListener,
nsICharsetDetectionObserver)
NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(nsHtml5StreamParser)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTION_3(nsHtml5StreamParser, mObserver, mRequest, mOwner)
nsHtml5StreamParser::nsHtml5StreamParser(nsHtml5Tokenizer* aTokenizer,
nsHtml5TreeOpExecutor* aExecutor,
nsHtml5Parser* aOwner)
: mFirstBuffer(new nsHtml5UTF16Buffer(NS_HTML5_STREAM_PARSER_READ_BUFFER_SIZE))
, mLastBuffer(mFirstBuffer)
, mExecutor(aExecutor)
, mTokenizer(aTokenizer)
, mOwner(aOwner)
{
}
nsHtml5StreamParser::~nsHtml5StreamParser()
{
mRequest = nsnull;
mObserver = nsnull;
mUnicodeDecoder = nsnull;
mSniffingBuffer = nsnull;
mMetaScanner = nsnull;
while (mFirstBuffer) {
nsHtml5UTF16Buffer* old = mFirstBuffer;
mFirstBuffer = mFirstBuffer->next;
delete old;
}
mExecutor = nsnull;
mTreeBuilder = nsnull;
mTokenizer = nsnull;
mOwner = nsnull;
}
nsresult
nsHtml5StreamParser::GetChannel(nsIChannel** aChannel)
{
return mRequest ? CallQueryInterface(mRequest, aChannel) :
NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsHtml5StreamParser::Notify(const char* aCharset, nsDetectionConfident aConf)
{
if (aConf == eBestAnswer || aConf == eSureAnswer) {
mCharset.Assign(aCharset);
mCharsetSource = kCharsetFromAutoDetection;
mExecutor->SetDocumentCharset(mCharset);
}
return NS_OK;
}
nsresult
nsHtml5StreamParser::SetupDecodingAndWriteSniffingBufferAndCurrentSegment(const PRUint8* aFromSegment, // can be null
PRUint32 aCount,
PRUint32* aWriteCount)
{
nsresult rv = NS_OK;
nsCOMPtr<nsICharsetConverterManager> convManager = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = convManager->GetUnicodeDecoder(mCharset.get(), getter_AddRefs(mUnicodeDecoder));
if (rv == NS_ERROR_UCONV_NOCONV) {
mCharset.Assign("windows-1252"); // lower case is the raw form
mCharsetSource = kCharsetFromWeakDocTypeDefault;
rv = convManager->GetUnicodeDecoderRaw(mCharset.get(), getter_AddRefs(mUnicodeDecoder));
mExecutor->SetDocumentCharset(mCharset);
}
NS_ENSURE_SUCCESS(rv, rv);
mUnicodeDecoder->SetInputErrorBehavior(nsIUnicodeDecoder::kOnError_Recover);
return WriteSniffingBufferAndCurrentSegment(aFromSegment, aCount, aWriteCount);
}
nsresult
nsHtml5StreamParser::WriteSniffingBufferAndCurrentSegment(const PRUint8* aFromSegment, // can be null
PRUint32 aCount,
PRUint32* aWriteCount)
{
nsresult rv = NS_OK;
if (mSniffingBuffer) {
PRUint32 writeCount;
rv = WriteStreamBytes(mSniffingBuffer, mSniffingLength, &writeCount);
NS_ENSURE_SUCCESS(rv, rv);
mSniffingBuffer = nsnull;
}
mMetaScanner = nsnull;
if (aFromSegment) {
rv = WriteStreamBytes(aFromSegment, aCount, aWriteCount);
}
return rv;
}
nsresult
nsHtml5StreamParser::SetupDecodingFromBom(const char* aCharsetName, const char* aDecoderCharsetName)
{
nsresult rv = NS_OK;
nsCOMPtr<nsICharsetConverterManager> convManager = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = convManager->GetUnicodeDecoderRaw(aDecoderCharsetName, getter_AddRefs(mUnicodeDecoder));
NS_ENSURE_SUCCESS(rv, rv);
mCharset.Assign(aCharsetName);
mCharsetSource = kCharsetFromByteOrderMark;
mExecutor->SetDocumentCharset(mCharset);
mSniffingBuffer = nsnull;
mMetaScanner = nsnull;
mBomState = BOM_SNIFFING_OVER;
return rv;
}
nsresult
nsHtml5StreamParser::FinalizeSniffing(const PRUint8* aFromSegment, // can be null
PRUint32 aCount,
PRUint32* aWriteCount,
PRUint32 aCountToSniffingLimit)
{
// meta scan failed.
if (mCharsetSource >= kCharsetFromHintPrevDoc) {
return SetupDecodingAndWriteSniffingBufferAndCurrentSegment(aFromSegment, aCount, aWriteCount);
}
// maybe try chardet now; instantiation copied from nsDOMFile
const nsAdoptingString& detectorName = nsContentUtils::GetLocalizedStringPref("intl.charset.detector");
if (!detectorName.IsEmpty()) {
nsCAutoString detectorContractID;
detectorContractID.AssignLiteral(NS_CHARSET_DETECTOR_CONTRACTID_BASE);
AppendUTF16toUTF8(detectorName, detectorContractID);
nsCOMPtr<nsICharsetDetector> detector = do_CreateInstance(detectorContractID.get());
if (detector) {
nsresult rv = detector->Init(this);
NS_ENSURE_SUCCESS(rv, rv);
PRBool dontFeed = PR_FALSE;
if (mSniffingBuffer) {
rv = detector->DoIt((const char*)mSniffingBuffer.get(), mSniffingLength, &dontFeed);
NS_ENSURE_SUCCESS(rv, rv);
}
if (!dontFeed && aFromSegment) {
rv = detector->DoIt((const char*)aFromSegment, aCountToSniffingLimit, &dontFeed);
NS_ENSURE_SUCCESS(rv, rv);
}
rv = detector->Done();
NS_ENSURE_SUCCESS(rv, rv);
// fall thru; callback may have changed charset
} else {
NS_ERROR("Could not instantiate charset detector.");
}
}
if (mCharsetSource == kCharsetUninitialized) {
// Hopefully this case is never needed, but dealing with it anyway
mCharset.Assign("windows-1252");
mCharsetSource = kCharsetFromWeakDocTypeDefault;
mExecutor->SetDocumentCharset(mCharset);
}
return SetupDecodingAndWriteSniffingBufferAndCurrentSegment(aFromSegment, aCount, aWriteCount);
}
nsresult
nsHtml5StreamParser::SniffStreamBytes(const PRUint8* aFromSegment,
PRUint32 aCount,
PRUint32* aWriteCount)
{
nsresult rv = NS_OK;
PRUint32 writeCount;
for (PRUint32 i = 0; i < aCount; i++) {
switch (mBomState) {
case BOM_SNIFFING_NOT_STARTED:
NS_ASSERTION(i == 0, "Bad BOM sniffing state.");
switch (*aFromSegment) {
case 0xEF:
mBomState = SEEN_UTF_8_FIRST_BYTE;
break;
case 0xFF:
mBomState = SEEN_UTF_16_LE_FIRST_BYTE;
break;
case 0xFE:
mBomState = SEEN_UTF_16_BE_FIRST_BYTE;
break;
default:
mBomState = BOM_SNIFFING_OVER;
break;
}
break;
case SEEN_UTF_16_LE_FIRST_BYTE:
if (aFromSegment[i] == 0xFE) {
rv = SetupDecodingFromBom("UTF-16", "UTF-16LE"); // upper case is the raw form
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 count = aCount - (i + 1);
rv = WriteStreamBytes(aFromSegment + (i + 1), count, &writeCount);
NS_ENSURE_SUCCESS(rv, rv);
*aWriteCount = writeCount + (i + 1);
return rv;
}
mBomState = BOM_SNIFFING_OVER;
break;
case SEEN_UTF_16_BE_FIRST_BYTE:
if (aFromSegment[i] == 0xFF) {
rv = SetupDecodingFromBom("UTF-16", "UTF-16BE"); // upper case is the raw form
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 count = aCount - (i + 1);
rv = WriteStreamBytes(aFromSegment + (i + 1), count, &writeCount);
NS_ENSURE_SUCCESS(rv, rv);
*aWriteCount = writeCount + (i + 1);
return rv;
}
mBomState = BOM_SNIFFING_OVER;
break;
case SEEN_UTF_8_FIRST_BYTE:
if (aFromSegment[i] == 0xBB) {
mBomState = SEEN_UTF_8_SECOND_BYTE;
} else {
mBomState = BOM_SNIFFING_OVER;
}
break;
case SEEN_UTF_8_SECOND_BYTE:
if (aFromSegment[i] == 0xBF) {
rv = SetupDecodingFromBom("UTF-8", "UTF-8"); // upper case is the raw form
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 count = aCount - (i + 1);
rv = WriteStreamBytes(aFromSegment + (i + 1), count, &writeCount);
NS_ENSURE_SUCCESS(rv, rv);
*aWriteCount = writeCount + (i + 1);
return rv;
}
mBomState = BOM_SNIFFING_OVER;
break;
default:
goto bom_loop_end;
}
}
// if we get here, there either was no BOM or the BOM sniffing isn't complete yet
bom_loop_end:
if (!mMetaScanner) {
mMetaScanner = new nsHtml5MetaScanner();
}
if (mSniffingLength + aCount >= NS_HTML5_STREAM_PARSER_SNIFFING_BUFFER_SIZE) {
// this is the last buffer
PRUint32 countToSniffingLimit = NS_HTML5_STREAM_PARSER_SNIFFING_BUFFER_SIZE - mSniffingLength;
nsHtml5ByteReadable readable(aFromSegment, aFromSegment + countToSniffingLimit);
mMetaScanner->sniff(&readable, getter_AddRefs(mUnicodeDecoder), mCharset);
if (mUnicodeDecoder) {
mUnicodeDecoder->SetInputErrorBehavior(nsIUnicodeDecoder::kOnError_Recover);
// meta scan successful
mCharsetSource = kCharsetFromMetaPrescan;
mExecutor->SetDocumentCharset(mCharset);
mMetaScanner = nsnull;
return WriteSniffingBufferAndCurrentSegment(aFromSegment, aCount, aWriteCount);
}
return FinalizeSniffing(aFromSegment, aCount, aWriteCount, countToSniffingLimit);
}
// not the last buffer
nsHtml5ByteReadable readable(aFromSegment, aFromSegment + aCount);
mMetaScanner->sniff(&readable, getter_AddRefs(mUnicodeDecoder), mCharset);
if (mUnicodeDecoder) {
// meta scan successful
mCharsetSource = kCharsetFromMetaPrescan;
mExecutor->SetDocumentCharset(mCharset);
mMetaScanner = nsnull;
return WriteSniffingBufferAndCurrentSegment(aFromSegment, aCount, aWriteCount);
}
if (!mSniffingBuffer) {
mSniffingBuffer = new PRUint8[NS_HTML5_STREAM_PARSER_SNIFFING_BUFFER_SIZE];
}
memcpy(mSniffingBuffer + mSniffingLength, aFromSegment, aCount);
mSniffingLength += aCount;
*aWriteCount = aCount;
return NS_OK;
}
nsresult
nsHtml5StreamParser::WriteStreamBytes(const PRUint8* aFromSegment,
PRUint32 aCount,
PRUint32* aWriteCount)
{
// mLastBuffer always points to a buffer of the size NS_HTML5_STREAM_PARSER_READ_BUFFER_SIZE.
if (mLastBuffer->getEnd() == NS_HTML5_STREAM_PARSER_READ_BUFFER_SIZE) {
mLastBuffer = (mLastBuffer->next = new nsHtml5UTF16Buffer(NS_HTML5_STREAM_PARSER_READ_BUFFER_SIZE));
}
PRUint32 totalByteCount = 0;
for (;;) {
PRInt32 end = mLastBuffer->getEnd();
PRInt32 byteCount = aCount - totalByteCount;
PRInt32 utf16Count = NS_HTML5_STREAM_PARSER_READ_BUFFER_SIZE - end;
NS_ASSERTION(utf16Count, "Trying to convert into a buffer with no free space!");
nsresult convResult = mUnicodeDecoder->Convert((const char*)aFromSegment, &byteCount, mLastBuffer->getBuffer() + end, &utf16Count);
end += utf16Count;
mLastBuffer->setEnd(end);
totalByteCount += byteCount;
aFromSegment += byteCount;
NS_ASSERTION(mLastBuffer->getEnd() <= NS_HTML5_STREAM_PARSER_READ_BUFFER_SIZE, "The Unicode decoder wrote too much data.");
if (NS_FAILED(convResult)) {
if (totalByteCount < aCount) { // mimicking nsScanner even though this seems wrong
++totalByteCount;
++aFromSegment;
}
mLastBuffer->getBuffer()[end] = 0xFFFD;
++end;
mLastBuffer->setEnd(end);
if (end == NS_HTML5_STREAM_PARSER_READ_BUFFER_SIZE) {
mLastBuffer = (mLastBuffer->next = new nsHtml5UTF16Buffer(NS_HTML5_STREAM_PARSER_READ_BUFFER_SIZE));
}
mUnicodeDecoder->Reset();
if (totalByteCount == aCount) {
*aWriteCount = totalByteCount;
return NS_OK;
}
} else if (convResult == NS_PARTIAL_MORE_OUTPUT) {
mLastBuffer = (mLastBuffer->next = new nsHtml5UTF16Buffer(NS_HTML5_STREAM_PARSER_READ_BUFFER_SIZE));
NS_ASSERTION(totalByteCount < aCount, "The Unicode decoder has consumed too many bytes.");
} else {
NS_ASSERTION(totalByteCount == aCount, "The Unicode decoder consumed the wrong number of bytes.");
*aWriteCount = totalByteCount;
return NS_OK;
}
}
}
// nsIRequestObserver methods:
nsresult
nsHtml5StreamParser::OnStartRequest(nsIRequest* aRequest, nsISupports* aContext)
{
NS_PRECONDITION(eNone == mStreamListenerState,
"Parser's nsIStreamListener API was not setup "
"correctly in constructor.");
NS_PRECONDITION(mExecutor->GetLifeCycle() == NOT_STARTED,
"Got OnStartRequest at the wrong stage in the life cycle.");
if (mObserver) {
mObserver->OnStartRequest(aRequest, aContext);
}
#ifdef DEBUG
mStreamListenerState = eOnStart;
#endif
mRequest = aRequest;
/*
* If you move the following line, be very careful not to cause
* WillBuildModel to be called before the document has had its
* script global object set.
*/
mTokenizer->start();
mExecutor->SetLifeCycle(PARSING);
if (mCharsetSource < kCharsetFromChannel) {
// we aren't ready to commit to an encoding yet
// leave converter uninstantiated for now
return NS_OK;
}
nsresult rv = NS_OK;
nsCOMPtr<nsICharsetConverterManager> convManager = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = convManager->GetUnicodeDecoder(mCharset.get(), getter_AddRefs(mUnicodeDecoder));
NS_ENSURE_SUCCESS(rv, rv);
mUnicodeDecoder->SetInputErrorBehavior(nsIUnicodeDecoder::kOnError_Recover);
return NS_OK;
}
nsresult
nsHtml5StreamParser::OnStopRequest(nsIRequest* aRequest,
nsISupports* aContext,
nsresult status)
{
mExecutor->MaybeFlush();
NS_ASSERTION(mRequest == aRequest, "Got Stop on wrong stream.");
nsresult rv = NS_OK;
if (!mUnicodeDecoder) {
PRUint32 writeCount;
rv = FinalizeSniffing(nsnull, 0, &writeCount, 0);
NS_ENSURE_SUCCESS(rv, rv);
}
switch (mExecutor->GetLifeCycle()) {
case TERMINATED:
break;
case NOT_STARTED:
NS_NOTREACHED("OnStopRequest before calling Parse() on the owner.");
break;
case STREAM_ENDING:
NS_ERROR("OnStopRequest when the stream lifecycle was already ending.");
break;
default:
mExecutor->SetLifeCycle(STREAM_ENDING);
break;
}
#ifdef DEBUG
mStreamListenerState = eOnStop;
#endif
if (!mExecutor->IsScriptExecuting()) {
ParseUntilSuspend();
}
if (mObserver) {
mObserver->OnStopRequest(aRequest, aContext, status);
}
return NS_OK;
}
// nsIStreamListener method:
/*
* This function is invoked as a result of a call to a stream's
* ReadSegments() method. It is called for each contiguous buffer
* of data in the underlying stream or pipe. Using ReadSegments
* allows us to avoid copying data to read out of the stream.
*/
NS_METHOD
nsHtml5StreamParser::ParserWriteFunc(nsIInputStream* aInStream,
void* aHtml5StreamParser,
const char* aFromSegment,
PRUint32 aToOffset,
PRUint32 aCount,
PRUint32* aWriteCount)
{
nsHtml5StreamParser* streamParser = static_cast<nsHtml5StreamParser*> (aHtml5StreamParser);
if (streamParser->HasDecoder()) {
return streamParser->WriteStreamBytes((const PRUint8*)aFromSegment, aCount, aWriteCount);
} else {
return streamParser->SniffStreamBytes((const PRUint8*)aFromSegment, aCount, aWriteCount);
}
}
nsresult
nsHtml5StreamParser::OnDataAvailable(nsIRequest* aRequest,
nsISupports* aContext,
nsIInputStream* aInStream,
PRUint32 aSourceOffset,
PRUint32 aLength)
{
mExecutor->MaybeFlush();
NS_PRECONDITION(eOnStart == mStreamListenerState ||
eOnDataAvail == mStreamListenerState,
"Error: OnStartRequest() must be called before OnDataAvailable()");
NS_ASSERTION(mRequest == aRequest, "Got data on wrong stream.");
PRUint32 totalRead;
nsresult rv = aInStream->ReadSegments(nsHtml5StreamParser::ParserWriteFunc,
static_cast<void*> (this),
aLength,
&totalRead);
NS_ASSERTION(totalRead == aLength, "ReadSegments read the wrong number of bytes.");
if (!mExecutor->IsScriptExecuting()) {
ParseUntilSuspend();
}
return rv;
}
void
nsHtml5StreamParser::internalEncodingDeclaration(nsString* aEncoding)
{
if (mCharsetSource >= kCharsetFromMetaTag) { // this threshold corresponds to "confident" in the HTML5 spec
return;
}
nsresult rv = NS_OK;
nsCOMPtr<nsICharsetAlias> calias(do_GetService(kCharsetAliasCID, &rv));
if (NS_FAILED(rv)) {
return;
}
nsCAutoString newEncoding;
CopyUTF16toUTF8(*aEncoding, newEncoding);
PRBool eq;
rv = calias->Equals(newEncoding, mCharset, &eq);
if (NS_FAILED(rv)) {
return;
}
if (eq) {
mCharsetSource = kCharsetFromMetaTag; // become confident
return;
}
// XXX check HTML5 non-IANA aliases here
// The encodings are different. We want to reparse.
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(mRequest, &rv));
if (NS_SUCCEEDED(rv)) {
nsCAutoString method;
httpChannel->GetRequestMethod(method);
// XXX does Necko have a way to renavigate POST, etc. without hitting
// the network?
if (!method.EqualsLiteral("GET")) {
// This is the old Gecko behavior but the spec disagrees.
// Don't reparse on POST.
return;
}
}
// we still want to reparse
mExecutor->NeedsCharsetSwitchTo(newEncoding);
}
void
nsHtml5StreamParser::ParseUntilSuspend()
{
NS_PRECONDITION(!mExecutor->NeedsCharsetSwitch(), "ParseUntilSuspend called when charset switch needed.");
if (mBlocked) {
return;
}
switch (mExecutor->GetLifeCycle()) {
case TERMINATED:
return;
case NOT_STARTED:
NS_NOTREACHED("Bad life cycle!");
break;
default:
break;
}
mExecutor->WillResume();
mSuspending = PR_FALSE;
for (;;) {
if (!mFirstBuffer->hasMore()) {
if (mFirstBuffer == mLastBuffer) {
switch (mExecutor->GetLifeCycle()) {
case TERMINATED:
// something like cache manisfests stopped the parse in mid-flight
return;
case PARSING:
// never release the last buffer. instead just zero its indeces for refill
mFirstBuffer->setStart(0);
mFirstBuffer->setEnd(0);
return; // no more data for now but expecting more
case STREAM_ENDING:
mDone = PR_TRUE;
if (mExecutor->ReadyToCallDidBuildModel(PR_FALSE)) {
mExecutor->DidBuildModel();
}
return; // no more data and not expecting more
default:
NS_NOTREACHED("It should be impossible to reach this.");
return;
}
} else {
nsHtml5UTF16Buffer* oldBuf = mFirstBuffer;
mFirstBuffer = mFirstBuffer->next;
delete oldBuf;
continue;
}
}
if (mBlocked || (mExecutor->GetLifeCycle() == TERMINATED)) {
return;
}
// now we have a non-empty buffer
mFirstBuffer->adjust(mLastWasCR);
mLastWasCR = PR_FALSE;
if (mFirstBuffer->hasMore()) {
mLastWasCR = mTokenizer->tokenizeBuffer(mFirstBuffer);
NS_ASSERTION(!(mExecutor->HasScriptElement() && mExecutor->NeedsCharsetSwitch()), "Can't have both script and charset switch.");
mExecutor->MaybeExecuteScript();
if (mExecutor->MaybePerformCharsetSwitch() == NS_ERROR_HTMLPARSER_STOPPARSING) {
return;
}
if (mBlocked) {
mExecutor->WillInterrupt();
return;
}
// XXX we may now have document.written stuff in the other buffer
// queue
if (mSuspending) {
mOwner->MaybePostContinueEvent();
mExecutor->WillInterrupt();
return;
}
}
continue;
}
}