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flutter_flutter/engine/core/html/parser/HTMLTokenizer.cpp
Adam Barth 22b946ab61 Remove HTMLParserOptions 
We always use threading now and there aren't any other options.

R=eseidel@chromium.org, esprehn@chromium.org

Review URL: https://codereview.chromium.org/676133002
2014-10-24 22:49:38 -07:00

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/*
* Copyright (C) 2008 Apple Inc. All Rights Reserved.
* Copyright (C) 2009 Torch Mobile, Inc. http://www.torchmobile.com/
* Copyright (C) 2010 Google, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "core/html/parser/HTMLTokenizer.h"
#include "core/HTMLNames.h"
#include "core/HTMLTokenizerNames.h"
#include "core/html/parser/AtomicHTMLToken.h"
#include "core/html/parser/HTMLEntityParser.h"
#include "core/html/parser/HTMLParserIdioms.h"
#include "core/html/parser/HTMLTreeBuilder.h"
#include "core/html/parser/MarkupTokenizerInlines.h"
#include "platform/NotImplemented.h"
#include "wtf/ASCIICType.h"
#include "wtf/text/AtomicString.h"
#include "wtf/unicode/Unicode.h"
// Please don't use DEFINE_STATIC_LOCAL in this file. The HTMLTokenizer is used
// from multiple threads and DEFINE_STATIC_LOCAL isn't threadsafe.
#undef DEFINE_STATIC_LOCAL
namespace blink {
// This has to go in a .cpp file, as the linker doesn't like it being included more than once.
// We don't have an HTMLToken.cpp though, so this is the next best place.
QualifiedName AtomicHTMLToken::nameForAttribute(const HTMLToken::Attribute& attribute) const
{
return QualifiedName(AtomicString(attribute.name));
}
bool AtomicHTMLToken::usesName() const
{
return m_type == HTMLToken::StartTag || m_type == HTMLToken::EndTag;
}
bool AtomicHTMLToken::usesAttributes() const
{
return m_type == HTMLToken::StartTag || m_type == HTMLToken::EndTag;
}
static inline UChar toLowerCase(UChar cc)
{
ASSERT(isASCIIUpper(cc));
const int lowerCaseOffset = 0x20;
return cc + lowerCaseOffset;
}
static inline bool vectorEqualsString(const Vector<LChar, 32>& vector, const String& string)
{
if (vector.size() != string.length())
return false;
if (!string.length())
return true;
return equal(string.impl(), vector.data(), vector.size());
}
static inline bool isEndTagBufferingState(HTMLTokenizer::State state)
{
switch (state) {
case HTMLTokenizer::RAWTEXTEndTagOpenState:
case HTMLTokenizer::RAWTEXTEndTagNameState:
case HTMLTokenizer::ScriptDataEndTagOpenState:
case HTMLTokenizer::ScriptDataEndTagNameState:
case HTMLTokenizer::ScriptDataEscapedEndTagOpenState:
case HTMLTokenizer::ScriptDataEscapedEndTagNameState:
return true;
default:
return false;
}
}
#define HTML_BEGIN_STATE(stateName) BEGIN_STATE(HTMLTokenizer, stateName)
#define HTML_RECONSUME_IN(stateName) RECONSUME_IN(HTMLTokenizer, stateName)
#define HTML_ADVANCE_TO(stateName) ADVANCE_TO(HTMLTokenizer, stateName)
#define HTML_SWITCH_TO(stateName) SWITCH_TO(HTMLTokenizer, stateName)
HTMLTokenizer::HTMLTokenizer()
: m_inputStreamPreprocessor(this)
{
reset();
}
HTMLTokenizer::~HTMLTokenizer()
{
}
void HTMLTokenizer::reset()
{
m_state = HTMLTokenizer::DataState;
m_token = 0;
m_additionalAllowedCharacter = '\0';
}
inline bool HTMLTokenizer::processEntity(SegmentedString& source)
{
bool notEnoughCharacters = false;
DecodedHTMLEntity decodedEntity;
bool success = consumeHTMLEntity(source, decodedEntity, notEnoughCharacters);
if (notEnoughCharacters)
return false;
if (!success) {
ASSERT(decodedEntity.isEmpty());
bufferCharacter('&');
} else {
for (unsigned i = 0; i < decodedEntity.length; ++i)
bufferCharacter(decodedEntity.data[i]);
}
return true;
}
bool HTMLTokenizer::flushBufferedEndTag(SegmentedString& source)
{
ASSERT(m_token->type() == HTMLToken::Character || m_token->type() == HTMLToken::Uninitialized);
source.advanceAndUpdateLineNumber();
if (m_token->type() == HTMLToken::Character)
return true;
m_token->beginEndTag(m_bufferedEndTagName);
m_bufferedEndTagName.clear();
m_appropriateEndTagName.clear();
m_temporaryBuffer.clear();
return false;
}
#define FLUSH_AND_ADVANCE_TO(stateName) \
do { \
m_state = HTMLTokenizer::stateName; \
if (flushBufferedEndTag(source)) \
return true; \
if (source.isEmpty() \
|| !m_inputStreamPreprocessor.peek(source)) \
return haveBufferedCharacterToken(); \
cc = m_inputStreamPreprocessor.nextInputCharacter(); \
goto stateName; \
} while (false)
bool HTMLTokenizer::flushEmitAndResumeIn(SegmentedString& source, HTMLTokenizer::State state)
{
m_state = state;
flushBufferedEndTag(source);
return true;
}
bool HTMLTokenizer::nextToken(SegmentedString& source, HTMLToken& token)
{
// If we have a token in progress, then we're supposed to be called back
// with the same token so we can finish it.
ASSERT(!m_token || m_token == &token || token.type() == HTMLToken::Uninitialized);
m_token = &token;
if (!m_bufferedEndTagName.isEmpty() && !isEndTagBufferingState(m_state)) {
// FIXME: This should call flushBufferedEndTag().
// We started an end tag during our last iteration.
m_token->beginEndTag(m_bufferedEndTagName);
m_bufferedEndTagName.clear();
m_appropriateEndTagName.clear();
m_temporaryBuffer.clear();
if (m_state == HTMLTokenizer::DataState) {
// We're back in the data state, so we must be done with the tag.
return true;
}
}
if (source.isEmpty() || !m_inputStreamPreprocessor.peek(source))
return haveBufferedCharacterToken();
UChar cc = m_inputStreamPreprocessor.nextInputCharacter();
// Source: http://www.whatwg.org/specs/web-apps/current-work/#tokenisation0
switch (m_state) {
HTML_BEGIN_STATE(DataState) {
if (cc == '&')
HTML_ADVANCE_TO(CharacterReferenceInDataState);
else if (cc == '<') {
if (m_token->type() == HTMLToken::Character) {
// We have a bunch of character tokens queued up that we
// are emitting lazily here.
return true;
}
HTML_ADVANCE_TO(TagOpenState);
} else if (cc == kEndOfFileMarker)
return emitEndOfFile(source);
else {
bufferCharacter(cc);
HTML_ADVANCE_TO(DataState);
}
}
END_STATE()
HTML_BEGIN_STATE(CharacterReferenceInDataState) {
if (!processEntity(source))
return haveBufferedCharacterToken();
HTML_SWITCH_TO(DataState);
}
END_STATE()
HTML_BEGIN_STATE(RAWTEXTState) {
if (cc == '<')
HTML_ADVANCE_TO(RAWTEXTLessThanSignState);
else if (cc == kEndOfFileMarker)
return emitEndOfFile(source);
else {
bufferCharacter(cc);
HTML_ADVANCE_TO(RAWTEXTState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataState) {
if (cc == '<')
HTML_ADVANCE_TO(ScriptDataLessThanSignState);
else if (cc == kEndOfFileMarker)
return emitEndOfFile(source);
else {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataState);
}
}
END_STATE()
HTML_BEGIN_STATE(PLAINTEXTState) {
if (cc == kEndOfFileMarker)
return emitEndOfFile(source);
bufferCharacter(cc);
HTML_ADVANCE_TO(PLAINTEXTState);
}
END_STATE()
HTML_BEGIN_STATE(TagOpenState) {
if (cc == '!')
HTML_ADVANCE_TO(MarkupDeclarationOpenState);
else if (cc == '/')
HTML_ADVANCE_TO(EndTagOpenState);
else if (isASCIIUpper(cc)) {
m_token->beginStartTag(toLowerCase(cc));
HTML_ADVANCE_TO(TagNameState);
} else if (isASCIILower(cc)) {
m_token->beginStartTag(cc);
HTML_ADVANCE_TO(TagNameState);
} else if (cc == '?') {
parseError();
// The spec consumes the current character before switching
// to the bogus comment state, but it's easier to implement
// if we reconsume the current character.
HTML_RECONSUME_IN(BogusCommentState);
} else {
parseError();
bufferCharacter('<');
HTML_RECONSUME_IN(DataState);
}
}
END_STATE()
HTML_BEGIN_STATE(EndTagOpenState) {
if (isASCIIUpper(cc)) {
m_token->beginEndTag(static_cast<LChar>(toLowerCase(cc)));
m_appropriateEndTagName.clear();
HTML_ADVANCE_TO(TagNameState);
} else if (isASCIILower(cc)) {
m_token->beginEndTag(static_cast<LChar>(cc));
m_appropriateEndTagName.clear();
HTML_ADVANCE_TO(TagNameState);
} else if (cc == '>') {
parseError();
HTML_ADVANCE_TO(DataState);
} else if (cc == kEndOfFileMarker) {
parseError();
bufferCharacter('<');
bufferCharacter('/');
HTML_RECONSUME_IN(DataState);
} else {
parseError();
HTML_RECONSUME_IN(BogusCommentState);
}
}
END_STATE()
HTML_BEGIN_STATE(TagNameState) {
if (isTokenizerWhitespace(cc))
HTML_ADVANCE_TO(BeforeAttributeNameState);
else if (cc == '/')
HTML_ADVANCE_TO(SelfClosingStartTagState);
else if (cc == '>')
return emitAndResumeIn(source, HTMLTokenizer::DataState);
else if (isASCIIUpper(cc)) {
m_token->appendToName(toLowerCase(cc));
HTML_ADVANCE_TO(TagNameState);
} else if (cc == kEndOfFileMarker) {
parseError();
HTML_RECONSUME_IN(DataState);
} else {
m_token->appendToName(cc);
HTML_ADVANCE_TO(TagNameState);
}
}
END_STATE()
HTML_BEGIN_STATE(RAWTEXTLessThanSignState) {
if (cc == '/') {
m_temporaryBuffer.clear();
ASSERT(m_bufferedEndTagName.isEmpty());
HTML_ADVANCE_TO(RAWTEXTEndTagOpenState);
} else {
bufferCharacter('<');
HTML_RECONSUME_IN(RAWTEXTState);
}
}
END_STATE()
HTML_BEGIN_STATE(RAWTEXTEndTagOpenState) {
if (isASCIIUpper(cc)) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
addToPossibleEndTag(static_cast<LChar>(toLowerCase(cc)));
HTML_ADVANCE_TO(RAWTEXTEndTagNameState);
} else if (isASCIILower(cc)) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
addToPossibleEndTag(static_cast<LChar>(cc));
HTML_ADVANCE_TO(RAWTEXTEndTagNameState);
} else {
bufferCharacter('<');
bufferCharacter('/');
HTML_RECONSUME_IN(RAWTEXTState);
}
}
END_STATE()
HTML_BEGIN_STATE(RAWTEXTEndTagNameState) {
if (isASCIIUpper(cc)) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
addToPossibleEndTag(static_cast<LChar>(toLowerCase(cc)));
HTML_ADVANCE_TO(RAWTEXTEndTagNameState);
} else if (isASCIILower(cc)) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
addToPossibleEndTag(static_cast<LChar>(cc));
HTML_ADVANCE_TO(RAWTEXTEndTagNameState);
} else {
if (isTokenizerWhitespace(cc)) {
if (isAppropriateEndTag()) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
FLUSH_AND_ADVANCE_TO(BeforeAttributeNameState);
}
} else if (cc == '/') {
if (isAppropriateEndTag()) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
FLUSH_AND_ADVANCE_TO(SelfClosingStartTagState);
}
} else if (cc == '>') {
if (isAppropriateEndTag()) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
return flushEmitAndResumeIn(source, HTMLTokenizer::DataState);
}
}
bufferCharacter('<');
bufferCharacter('/');
m_token->appendToCharacter(m_temporaryBuffer);
m_bufferedEndTagName.clear();
m_temporaryBuffer.clear();
HTML_RECONSUME_IN(RAWTEXTState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataLessThanSignState) {
if (cc == '/') {
m_temporaryBuffer.clear();
ASSERT(m_bufferedEndTagName.isEmpty());
HTML_ADVANCE_TO(ScriptDataEndTagOpenState);
} else if (cc == '!') {
bufferCharacter('<');
bufferCharacter('!');
HTML_ADVANCE_TO(ScriptDataEscapeStartState);
} else {
bufferCharacter('<');
HTML_RECONSUME_IN(ScriptDataState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataEndTagOpenState) {
if (isASCIIUpper(cc)) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
addToPossibleEndTag(static_cast<LChar>(toLowerCase(cc)));
HTML_ADVANCE_TO(ScriptDataEndTagNameState);
} else if (isASCIILower(cc)) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
addToPossibleEndTag(static_cast<LChar>(cc));
HTML_ADVANCE_TO(ScriptDataEndTagNameState);
} else {
bufferCharacter('<');
bufferCharacter('/');
HTML_RECONSUME_IN(ScriptDataState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataEndTagNameState) {
if (isASCIIUpper(cc)) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
addToPossibleEndTag(static_cast<LChar>(toLowerCase(cc)));
HTML_ADVANCE_TO(ScriptDataEndTagNameState);
} else if (isASCIILower(cc)) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
addToPossibleEndTag(static_cast<LChar>(cc));
HTML_ADVANCE_TO(ScriptDataEndTagNameState);
} else {
if (isTokenizerWhitespace(cc)) {
if (isAppropriateEndTag()) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
FLUSH_AND_ADVANCE_TO(BeforeAttributeNameState);
}
} else if (cc == '/') {
if (isAppropriateEndTag()) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
FLUSH_AND_ADVANCE_TO(SelfClosingStartTagState);
}
} else if (cc == '>') {
if (isAppropriateEndTag()) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
return flushEmitAndResumeIn(source, HTMLTokenizer::DataState);
}
}
bufferCharacter('<');
bufferCharacter('/');
m_token->appendToCharacter(m_temporaryBuffer);
m_bufferedEndTagName.clear();
m_temporaryBuffer.clear();
HTML_RECONSUME_IN(ScriptDataState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataEscapeStartState) {
if (cc == '-') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataEscapeStartDashState);
} else
HTML_RECONSUME_IN(ScriptDataState);
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataEscapeStartDashState) {
if (cc == '-') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataEscapedDashDashState);
} else
HTML_RECONSUME_IN(ScriptDataState);
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataEscapedState) {
if (cc == '-') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataEscapedDashState);
} else if (cc == '<')
HTML_ADVANCE_TO(ScriptDataEscapedLessThanSignState);
else if (cc == kEndOfFileMarker) {
parseError();
HTML_RECONSUME_IN(DataState);
} else {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataEscapedState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataEscapedDashState) {
if (cc == '-') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataEscapedDashDashState);
} else if (cc == '<')
HTML_ADVANCE_TO(ScriptDataEscapedLessThanSignState);
else if (cc == kEndOfFileMarker) {
parseError();
HTML_RECONSUME_IN(DataState);
} else {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataEscapedState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataEscapedDashDashState) {
if (cc == '-') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataEscapedDashDashState);
} else if (cc == '<')
HTML_ADVANCE_TO(ScriptDataEscapedLessThanSignState);
else if (cc == '>') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataState);
} else if (cc == kEndOfFileMarker) {
parseError();
HTML_RECONSUME_IN(DataState);
} else {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataEscapedState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataEscapedLessThanSignState) {
if (cc == '/') {
m_temporaryBuffer.clear();
ASSERT(m_bufferedEndTagName.isEmpty());
HTML_ADVANCE_TO(ScriptDataEscapedEndTagOpenState);
} else if (isASCIIUpper(cc)) {
bufferCharacter('<');
bufferCharacter(cc);
m_temporaryBuffer.clear();
m_temporaryBuffer.append(toLowerCase(cc));
HTML_ADVANCE_TO(ScriptDataDoubleEscapeStartState);
} else if (isASCIILower(cc)) {
bufferCharacter('<');
bufferCharacter(cc);
m_temporaryBuffer.clear();
m_temporaryBuffer.append(static_cast<LChar>(cc));
HTML_ADVANCE_TO(ScriptDataDoubleEscapeStartState);
} else {
bufferCharacter('<');
HTML_RECONSUME_IN(ScriptDataEscapedState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataEscapedEndTagOpenState) {
if (isASCIIUpper(cc)) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
addToPossibleEndTag(static_cast<LChar>(toLowerCase(cc)));
HTML_ADVANCE_TO(ScriptDataEscapedEndTagNameState);
} else if (isASCIILower(cc)) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
addToPossibleEndTag(static_cast<LChar>(cc));
HTML_ADVANCE_TO(ScriptDataEscapedEndTagNameState);
} else {
bufferCharacter('<');
bufferCharacter('/');
HTML_RECONSUME_IN(ScriptDataEscapedState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataEscapedEndTagNameState) {
if (isASCIIUpper(cc)) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
addToPossibleEndTag(static_cast<LChar>(toLowerCase(cc)));
HTML_ADVANCE_TO(ScriptDataEscapedEndTagNameState);
} else if (isASCIILower(cc)) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
addToPossibleEndTag(static_cast<LChar>(cc));
HTML_ADVANCE_TO(ScriptDataEscapedEndTagNameState);
} else {
if (isTokenizerWhitespace(cc)) {
if (isAppropriateEndTag()) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
FLUSH_AND_ADVANCE_TO(BeforeAttributeNameState);
}
} else if (cc == '/') {
if (isAppropriateEndTag()) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
FLUSH_AND_ADVANCE_TO(SelfClosingStartTagState);
}
} else if (cc == '>') {
if (isAppropriateEndTag()) {
m_temporaryBuffer.append(static_cast<LChar>(cc));
return flushEmitAndResumeIn(source, HTMLTokenizer::DataState);
}
}
bufferCharacter('<');
bufferCharacter('/');
m_token->appendToCharacter(m_temporaryBuffer);
m_bufferedEndTagName.clear();
m_temporaryBuffer.clear();
HTML_RECONSUME_IN(ScriptDataEscapedState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataDoubleEscapeStartState) {
if (isTokenizerWhitespace(cc) || cc == '/' || cc == '>') {
bufferCharacter(cc);
if (temporaryBufferIs(HTMLNames::scriptTag.localName()))
HTML_ADVANCE_TO(ScriptDataDoubleEscapedState);
else
HTML_ADVANCE_TO(ScriptDataEscapedState);
} else if (isASCIIUpper(cc)) {
bufferCharacter(cc);
m_temporaryBuffer.append(toLowerCase(cc));
HTML_ADVANCE_TO(ScriptDataDoubleEscapeStartState);
} else if (isASCIILower(cc)) {
bufferCharacter(cc);
m_temporaryBuffer.append(static_cast<LChar>(cc));
HTML_ADVANCE_TO(ScriptDataDoubleEscapeStartState);
} else
HTML_RECONSUME_IN(ScriptDataEscapedState);
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataDoubleEscapedState) {
if (cc == '-') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataDoubleEscapedDashState);
} else if (cc == '<') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataDoubleEscapedLessThanSignState);
} else if (cc == kEndOfFileMarker) {
parseError();
HTML_RECONSUME_IN(DataState);
} else {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataDoubleEscapedState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataDoubleEscapedDashState) {
if (cc == '-') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataDoubleEscapedDashDashState);
} else if (cc == '<') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataDoubleEscapedLessThanSignState);
} else if (cc == kEndOfFileMarker) {
parseError();
HTML_RECONSUME_IN(DataState);
} else {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataDoubleEscapedState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataDoubleEscapedDashDashState) {
if (cc == '-') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataDoubleEscapedDashDashState);
} else if (cc == '<') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataDoubleEscapedLessThanSignState);
} else if (cc == '>') {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataState);
} else if (cc == kEndOfFileMarker) {
parseError();
HTML_RECONSUME_IN(DataState);
} else {
bufferCharacter(cc);
HTML_ADVANCE_TO(ScriptDataDoubleEscapedState);
}
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataDoubleEscapedLessThanSignState) {
if (cc == '/') {
bufferCharacter(cc);
m_temporaryBuffer.clear();
HTML_ADVANCE_TO(ScriptDataDoubleEscapeEndState);
} else
HTML_RECONSUME_IN(ScriptDataDoubleEscapedState);
}
END_STATE()
HTML_BEGIN_STATE(ScriptDataDoubleEscapeEndState) {
if (isTokenizerWhitespace(cc) || cc == '/' || cc == '>') {
bufferCharacter(cc);
if (temporaryBufferIs(HTMLNames::scriptTag.localName()))
HTML_ADVANCE_TO(ScriptDataEscapedState);
else
HTML_ADVANCE_TO(ScriptDataDoubleEscapedState);
} else if (isASCIIUpper(cc)) {
bufferCharacter(cc);
m_temporaryBuffer.append(toLowerCase(cc));
HTML_ADVANCE_TO(ScriptDataDoubleEscapeEndState);
} else if (isASCIILower(cc)) {
bufferCharacter(cc);
m_temporaryBuffer.append(static_cast<LChar>(cc));
HTML_ADVANCE_TO(ScriptDataDoubleEscapeEndState);
} else
HTML_RECONSUME_IN(ScriptDataDoubleEscapedState);
}
END_STATE()
HTML_BEGIN_STATE(BeforeAttributeNameState) {
if (isTokenizerWhitespace(cc))
HTML_ADVANCE_TO(BeforeAttributeNameState);
else if (cc == '/')
HTML_ADVANCE_TO(SelfClosingStartTagState);
else if (cc == '>')
return emitAndResumeIn(source, HTMLTokenizer::DataState);
else if (isASCIIUpper(cc)) {
m_token->addNewAttribute();
m_token->beginAttributeName(source.numberOfCharactersConsumed());
m_token->appendToAttributeName(toLowerCase(cc));
HTML_ADVANCE_TO(AttributeNameState);
} else if (cc == kEndOfFileMarker) {
parseError();
HTML_RECONSUME_IN(DataState);
} else {
if (cc == '"' || cc == '\'' || cc == '<' || cc == '=')
parseError();
m_token->addNewAttribute();
m_token->beginAttributeName(source.numberOfCharactersConsumed());
m_token->appendToAttributeName(cc);
HTML_ADVANCE_TO(AttributeNameState);
}
}
END_STATE()
HTML_BEGIN_STATE(AttributeNameState) {
if (isTokenizerWhitespace(cc)) {
m_token->endAttributeName(source.numberOfCharactersConsumed());
HTML_ADVANCE_TO(AfterAttributeNameState);
} else if (cc == '/') {
m_token->endAttributeName(source.numberOfCharactersConsumed());
HTML_ADVANCE_TO(SelfClosingStartTagState);
} else if (cc == '=') {
m_token->endAttributeName(source.numberOfCharactersConsumed());
HTML_ADVANCE_TO(BeforeAttributeValueState);
} else if (cc == '>') {
m_token->endAttributeName(source.numberOfCharactersConsumed());
return emitAndResumeIn(source, HTMLTokenizer::DataState);
} else if (isASCIIUpper(cc)) {
m_token->appendToAttributeName(toLowerCase(cc));
HTML_ADVANCE_TO(AttributeNameState);
} else if (cc == kEndOfFileMarker) {
parseError();
m_token->endAttributeName(source.numberOfCharactersConsumed());
HTML_RECONSUME_IN(DataState);
} else {
if (cc == '"' || cc == '\'' || cc == '<' || cc == '=')
parseError();
m_token->appendToAttributeName(cc);
HTML_ADVANCE_TO(AttributeNameState);
}
}
END_STATE()
HTML_BEGIN_STATE(AfterAttributeNameState) {
if (isTokenizerWhitespace(cc))
HTML_ADVANCE_TO(AfterAttributeNameState);
else if (cc == '/')
HTML_ADVANCE_TO(SelfClosingStartTagState);
else if (cc == '=')
HTML_ADVANCE_TO(BeforeAttributeValueState);
else if (cc == '>')
return emitAndResumeIn(source, HTMLTokenizer::DataState);
else if (isASCIIUpper(cc)) {
m_token->addNewAttribute();
m_token->beginAttributeName(source.numberOfCharactersConsumed());
m_token->appendToAttributeName(toLowerCase(cc));
HTML_ADVANCE_TO(AttributeNameState);
} else if (cc == kEndOfFileMarker) {
parseError();
HTML_RECONSUME_IN(DataState);
} else {
if (cc == '"' || cc == '\'' || cc == '<')
parseError();
m_token->addNewAttribute();
m_token->beginAttributeName(source.numberOfCharactersConsumed());
m_token->appendToAttributeName(cc);
HTML_ADVANCE_TO(AttributeNameState);
}
}
END_STATE()
HTML_BEGIN_STATE(BeforeAttributeValueState) {
if (isTokenizerWhitespace(cc))
HTML_ADVANCE_TO(BeforeAttributeValueState);
else if (cc == '"') {
m_token->beginAttributeValue(source.numberOfCharactersConsumed() + 1);
HTML_ADVANCE_TO(AttributeValueDoubleQuotedState);
} else if (cc == '&') {
m_token->beginAttributeValue(source.numberOfCharactersConsumed());
HTML_RECONSUME_IN(AttributeValueUnquotedState);
} else if (cc == '\'') {
m_token->beginAttributeValue(source.numberOfCharactersConsumed() + 1);
HTML_ADVANCE_TO(AttributeValueSingleQuotedState);
} else if (cc == '>') {
parseError();
return emitAndResumeIn(source, HTMLTokenizer::DataState);
} else if (cc == kEndOfFileMarker) {
parseError();
HTML_RECONSUME_IN(DataState);
} else {
if (cc == '<' || cc == '=' || cc == '`')
parseError();
m_token->beginAttributeValue(source.numberOfCharactersConsumed());
m_token->appendToAttributeValue(cc);
HTML_ADVANCE_TO(AttributeValueUnquotedState);
}
}
END_STATE()
HTML_BEGIN_STATE(AttributeValueDoubleQuotedState) {
if (cc == '"') {
m_token->endAttributeValue(source.numberOfCharactersConsumed());
HTML_ADVANCE_TO(AfterAttributeValueQuotedState);
} else if (cc == '&') {
m_additionalAllowedCharacter = '"';
HTML_ADVANCE_TO(CharacterReferenceInAttributeValueState);
} else if (cc == kEndOfFileMarker) {
parseError();
m_token->endAttributeValue(source.numberOfCharactersConsumed());
HTML_RECONSUME_IN(DataState);
} else {
m_token->appendToAttributeValue(cc);
HTML_ADVANCE_TO(AttributeValueDoubleQuotedState);
}
}
END_STATE()
HTML_BEGIN_STATE(AttributeValueSingleQuotedState) {
if (cc == '\'') {
m_token->endAttributeValue(source.numberOfCharactersConsumed());
HTML_ADVANCE_TO(AfterAttributeValueQuotedState);
} else if (cc == '&') {
m_additionalAllowedCharacter = '\'';
HTML_ADVANCE_TO(CharacterReferenceInAttributeValueState);
} else if (cc == kEndOfFileMarker) {
parseError();
m_token->endAttributeValue(source.numberOfCharactersConsumed());
HTML_RECONSUME_IN(DataState);
} else {
m_token->appendToAttributeValue(cc);
HTML_ADVANCE_TO(AttributeValueSingleQuotedState);
}
}
END_STATE()
HTML_BEGIN_STATE(AttributeValueUnquotedState) {
if (isTokenizerWhitespace(cc)) {
m_token->endAttributeValue(source.numberOfCharactersConsumed());
HTML_ADVANCE_TO(BeforeAttributeNameState);
} else if (cc == '&') {
m_additionalAllowedCharacter = '>';
HTML_ADVANCE_TO(CharacterReferenceInAttributeValueState);
} else if (cc == '>') {
m_token->endAttributeValue(source.numberOfCharactersConsumed());
return emitAndResumeIn(source, HTMLTokenizer::DataState);
} else if (cc == kEndOfFileMarker) {
parseError();
m_token->endAttributeValue(source.numberOfCharactersConsumed());
HTML_RECONSUME_IN(DataState);
} else {
if (cc == '"' || cc == '\'' || cc == '<' || cc == '=' || cc == '`')
parseError();
m_token->appendToAttributeValue(cc);
HTML_ADVANCE_TO(AttributeValueUnquotedState);
}
}
END_STATE()
HTML_BEGIN_STATE(CharacterReferenceInAttributeValueState) {
bool notEnoughCharacters = false;
DecodedHTMLEntity decodedEntity;
bool success = consumeHTMLEntity(source, decodedEntity, notEnoughCharacters, m_additionalAllowedCharacter);
if (notEnoughCharacters)
return haveBufferedCharacterToken();
if (!success) {
ASSERT(decodedEntity.isEmpty());
m_token->appendToAttributeValue('&');
} else {
for (unsigned i = 0; i < decodedEntity.length; ++i)
m_token->appendToAttributeValue(decodedEntity.data[i]);
}
// We're supposed to switch back to the attribute value state that
// we were in when we were switched into this state. Rather than
// keeping track of this explictly, we observe that the previous
// state can be determined by m_additionalAllowedCharacter.
if (m_additionalAllowedCharacter == '"')
HTML_SWITCH_TO(AttributeValueDoubleQuotedState);
else if (m_additionalAllowedCharacter == '\'')
HTML_SWITCH_TO(AttributeValueSingleQuotedState);
else if (m_additionalAllowedCharacter == '>')
HTML_SWITCH_TO(AttributeValueUnquotedState);
else
ASSERT_NOT_REACHED();
}
END_STATE()
HTML_BEGIN_STATE(AfterAttributeValueQuotedState) {
if (isTokenizerWhitespace(cc))
HTML_ADVANCE_TO(BeforeAttributeNameState);
else if (cc == '/')
HTML_ADVANCE_TO(SelfClosingStartTagState);
else if (cc == '>')
return emitAndResumeIn(source, HTMLTokenizer::DataState);
else if (cc == kEndOfFileMarker) {
parseError();
HTML_RECONSUME_IN(DataState);
} else {
parseError();
HTML_RECONSUME_IN(BeforeAttributeNameState);
}
}
END_STATE()
HTML_BEGIN_STATE(SelfClosingStartTagState) {
if (cc == '>') {
m_token->setSelfClosing();
return emitAndResumeIn(source, HTMLTokenizer::DataState);
} else if (cc == kEndOfFileMarker) {
parseError();
HTML_RECONSUME_IN(DataState);
} else {
parseError();
HTML_RECONSUME_IN(BeforeAttributeNameState);
}
}
END_STATE()
HTML_BEGIN_STATE(BogusCommentState) {
m_token->beginComment();
HTML_RECONSUME_IN(ContinueBogusCommentState);
}
END_STATE()
HTML_BEGIN_STATE(ContinueBogusCommentState) {
if (cc == '>')
return emitAndResumeIn(source, HTMLTokenizer::DataState);
else if (cc == kEndOfFileMarker)
return emitAndReconsumeIn(source, HTMLTokenizer::DataState);
else {
m_token->appendToComment(cc);
HTML_ADVANCE_TO(ContinueBogusCommentState);
}
}
END_STATE()
HTML_BEGIN_STATE(MarkupDeclarationOpenState) {
if (cc == '-') {
SegmentedString::LookAheadResult result = source.lookAhead(HTMLTokenizerNames::dashDash);
if (result == SegmentedString::DidMatch) {
source.advanceAndASSERT('-');
source.advanceAndASSERT('-');
m_token->beginComment();
HTML_SWITCH_TO(CommentStartState);
} else if (result == SegmentedString::NotEnoughCharacters)
return haveBufferedCharacterToken();
}
parseError();
HTML_RECONSUME_IN(BogusCommentState);
}
END_STATE()
HTML_BEGIN_STATE(CommentStartState) {
if (cc == '-')
HTML_ADVANCE_TO(CommentStartDashState);
else if (cc == '>') {
parseError();
return emitAndResumeIn(source, HTMLTokenizer::DataState);
} else if (cc == kEndOfFileMarker) {
parseError();
return emitAndReconsumeIn(source, HTMLTokenizer::DataState);
} else {
m_token->appendToComment(cc);
HTML_ADVANCE_TO(CommentState);
}
}
END_STATE()
HTML_BEGIN_STATE(CommentStartDashState) {
if (cc == '-')
HTML_ADVANCE_TO(CommentEndState);
else if (cc == '>') {
parseError();
return emitAndResumeIn(source, HTMLTokenizer::DataState);
} else if (cc == kEndOfFileMarker) {
parseError();
return emitAndReconsumeIn(source, HTMLTokenizer::DataState);
} else {
m_token->appendToComment('-');
m_token->appendToComment(cc);
HTML_ADVANCE_TO(CommentState);
}
}
END_STATE()
HTML_BEGIN_STATE(CommentState) {
if (cc == '-')
HTML_ADVANCE_TO(CommentEndDashState);
else if (cc == kEndOfFileMarker) {
parseError();
return emitAndReconsumeIn(source, HTMLTokenizer::DataState);
} else {
m_token->appendToComment(cc);
HTML_ADVANCE_TO(CommentState);
}
}
END_STATE()
HTML_BEGIN_STATE(CommentEndDashState) {
if (cc == '-')
HTML_ADVANCE_TO(CommentEndState);
else if (cc == kEndOfFileMarker) {
parseError();
return emitAndReconsumeIn(source, HTMLTokenizer::DataState);
} else {
m_token->appendToComment('-');
m_token->appendToComment(cc);
HTML_ADVANCE_TO(CommentState);
}
}
END_STATE()
HTML_BEGIN_STATE(CommentEndState) {
if (cc == '>')
return emitAndResumeIn(source, HTMLTokenizer::DataState);
else if (cc == '!') {
parseError();
HTML_ADVANCE_TO(CommentEndBangState);
} else if (cc == '-') {
parseError();
m_token->appendToComment('-');
HTML_ADVANCE_TO(CommentEndState);
} else if (cc == kEndOfFileMarker) {
parseError();
return emitAndReconsumeIn(source, HTMLTokenizer::DataState);
} else {
parseError();
m_token->appendToComment('-');
m_token->appendToComment('-');
m_token->appendToComment(cc);
HTML_ADVANCE_TO(CommentState);
}
}
END_STATE()
HTML_BEGIN_STATE(CommentEndBangState) {
if (cc == '-') {
m_token->appendToComment('-');
m_token->appendToComment('-');
m_token->appendToComment('!');
HTML_ADVANCE_TO(CommentEndDashState);
} else if (cc == '>')
return emitAndResumeIn(source, HTMLTokenizer::DataState);
else if (cc == kEndOfFileMarker) {
parseError();
return emitAndReconsumeIn(source, HTMLTokenizer::DataState);
} else {
m_token->appendToComment('-');
m_token->appendToComment('-');
m_token->appendToComment('!');
m_token->appendToComment(cc);
HTML_ADVANCE_TO(CommentState);
}
}
END_STATE()
}
ASSERT_NOT_REACHED();
return false;
}
String HTMLTokenizer::bufferedCharacters() const
{
// FIXME: Add an assert about m_state.
StringBuilder characters;
characters.reserveCapacity(numberOfBufferedCharacters());
characters.append('<');
characters.append('/');
characters.append(m_temporaryBuffer.data(), m_temporaryBuffer.size());
return characters.toString();
}
void HTMLTokenizer::updateStateFor(const String& tagName)
{
if (threadSafeMatch(tagName, HTMLNames::scriptTag))
setState(HTMLTokenizer::ScriptDataState);
else if (threadSafeMatch(tagName, HTMLNames::styleTag))
setState(HTMLTokenizer::RAWTEXTState);
}
inline bool HTMLTokenizer::temporaryBufferIs(const String& expectedString)
{
return vectorEqualsString(m_temporaryBuffer, expectedString);
}
inline void HTMLTokenizer::addToPossibleEndTag(LChar cc)
{
ASSERT(isEndTagBufferingState(m_state));
m_bufferedEndTagName.append(cc);
}
inline bool HTMLTokenizer::isAppropriateEndTag()
{
if (m_bufferedEndTagName.size() != m_appropriateEndTagName.size())
return false;
size_t numCharacters = m_bufferedEndTagName.size();
for (size_t i = 0; i < numCharacters; i++) {
if (m_bufferedEndTagName[i] != m_appropriateEndTagName[i])
return false;
}
return true;
}
inline void HTMLTokenizer::parseError()
{
notImplemented();
}
}
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