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serenity/Libraries/LibWeb/HTML/Parser/HTMLTokenizer.cpp
Nico Weber f3b4fbf01f LibWeb: In the HTML tokenizer, pretty up ON_WHITESPACE a tiny bit 
No behavior change.
2020-10-09 17:40:19 +02:00

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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER 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 <LibTextCodec/Decoder.h>
#include <LibWeb/HTML/Parser/Entities.h>
#include <LibWeb/HTML/Parser/HTMLToken.h>
#include <LibWeb/HTML/Parser/HTMLTokenizer.h>
#include <ctype.h>
#include <string.h>
namespace Web::HTML {
#pragma GCC diagnostic ignored "-Wunused-label"
//#define TOKENIZER_TRACE
#ifdef TOKENIZER_TRACE
# define PARSE_ERROR() \
do { \
dbg() << "Parse error (tokenization)" << __PRETTY_FUNCTION__ << " @ " << __LINE__; \
} while (0)
#else
# define PARSE_ERROR()
#endif
#define CONSUME_NEXT_INPUT_CHARACTER \
current_input_character = next_code_point();
#define SWITCH_TO(new_state) \
do { \
will_switch_to(State::new_state); \
m_state = State::new_state; \
CONSUME_NEXT_INPUT_CHARACTER; \
goto new_state; \
} while (0)
#define RECONSUME_IN(new_state) \
do { \
will_reconsume_in(State::new_state); \
m_state = State::new_state; \
goto new_state; \
} while (0)
#define SWITCH_TO_RETURN_STATE \
do { \
will_switch_to(m_return_state); \
m_state = m_return_state; \
goto _StartOfFunction; \
} while (0)
#define RECONSUME_IN_RETURN_STATE \
do { \
will_reconsume_in(m_return_state); \
m_state = m_return_state; \
goto _StartOfFunction; \
} while (0)
#define SWITCH_TO_AND_EMIT_CURRENT_TOKEN(new_state) \
do { \
will_switch_to(State::new_state); \
m_state = State::new_state; \
will_emit(m_current_token); \
m_queued_tokens.enqueue(m_current_token); \
return m_queued_tokens.dequeue(); \
} while (0)
#define EMIT_CHARACTER_AND_RECONSUME_IN(code_point, new_state) \
do { \
m_queued_tokens.enqueue(HTMLToken::make_character(code_point)); \
will_reconsume_in(State::new_state); \
m_state = State::new_state; \
goto new_state; \
} while (0)
#define FLUSH_CODEPOINTS_CONSUMED_AS_A_CHARACTER_REFERENCE \
do { \
for (auto code_point : m_temporary_buffer) { \
if (consumed_as_part_of_an_attribute()) { \
m_current_token.m_tag.attributes.last().value_builder.append_code_point(code_point); \
} else { \
create_new_token(HTMLToken::Type::Character); \
m_current_token.m_comment_or_character.data.append_code_point(code_point); \
m_queued_tokens.enqueue(m_current_token); \
} \
} \
} while (0)
#define DONT_CONSUME_NEXT_INPUT_CHARACTER \
do { \
m_utf8_iterator = m_prev_utf8_iterator; \
} while (0)
#define ON(code_point) \
if (current_input_character.has_value() && current_input_character.value() == code_point)
#define ON_EOF \
if (!current_input_character.has_value())
#define ON_ASCII_ALPHA \
if (current_input_character.has_value() && isalpha(current_input_character.value()))
#define ON_ASCII_ALPHANUMERIC \
if (current_input_character.has_value() && isalnum(current_input_character.value()))
#define ON_ASCII_UPPER_ALPHA \
if (current_input_character.has_value() && current_input_character.value() >= 'A' && current_input_character.value() <= 'Z')
#define ON_ASCII_LOWER_ALPHA \
if (current_input_character.has_value() && current_input_character.value() >= 'a' && current_input_character.value() <= 'z')
#define ON_ASCII_DIGIT \
if (current_input_character.has_value() && isdigit(current_input_character.value()))
#define ON_ASCII_HEX_DIGIT \
if (current_input_character.has_value() && isxdigit(current_input_character.value()))
#define ON_WHITESPACE \
if (current_input_character.has_value() && strchr("\t\n\f ", current_input_character.value()))
#define ANYTHING_ELSE if (1)
#define EMIT_EOF \
do { \
if (m_has_emitted_eof) \
return {}; \
m_has_emitted_eof = true; \
create_new_token(HTMLToken::Type::EndOfFile); \
will_emit(m_current_token); \
m_queued_tokens.enqueue(m_current_token); \
return m_queued_tokens.dequeue(); \
} while (0)
#define EMIT_CURRENT_TOKEN \
do { \
will_emit(m_current_token); \
m_queued_tokens.enqueue(m_current_token); \
return m_queued_tokens.dequeue(); \
} while (0)
#define EMIT_CHARACTER(code_point) \
do { \
create_new_token(HTMLToken::Type::Character); \
m_current_token.m_comment_or_character.data.append_code_point(code_point); \
m_queued_tokens.enqueue(m_current_token); \
return m_queued_tokens.dequeue(); \
} while (0)
#define EMIT_CURRENT_CHARACTER \
EMIT_CHARACTER(current_input_character.value());
#define SWITCH_TO_AND_EMIT_CHARACTER(code_point, new_state) \
do { \
will_switch_to(State::new_state); \
m_state = State::new_state; \
EMIT_CHARACTER(code_point); \
} while (0)
#define SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(new_state) \
SWITCH_TO_AND_EMIT_CHARACTER(current_input_character.value(), new_state)
#define BEGIN_STATE(state) \
state: \
case State::state: { \
{ \
{
#define END_STATE \
ASSERT_NOT_REACHED(); \
break; \
} \
} \
}
static inline bool is_surrogate(u32 code_point)
{
return (code_point & 0xfffff800) == 0xd800;
}
static inline bool is_noncharacter(u32 code_point)
{
return code_point >= 0xfdd0 && (code_point <= 0xfdef || (code_point & 0xfffe) == 0xfffe) && code_point <= 0x10ffff;
}
static inline bool is_c0_control(u32 code_point)
{
return code_point <= 0x1f;
}
static inline bool is_control(u32 code_point)
{
return is_c0_control(code_point) || (code_point >= 0x7f && code_point <= 0x9f);
}
Optional<u32> HTMLTokenizer::next_code_point()
{
if (m_utf8_iterator == m_utf8_view.end())
return {};
m_prev_utf8_iterator = m_utf8_iterator;
++m_utf8_iterator;
#ifdef TOKENIZER_TRACE
dbg() << "(Tokenizer) Next code_point: " << (char)*m_prev_utf8_iterator;
#endif
return *m_prev_utf8_iterator;
}
Optional<u32> HTMLTokenizer::peek_code_point(size_t offset) const
{
auto it = m_utf8_iterator;
for (size_t i = 0; i < offset && it != m_utf8_view.end(); ++i)
++it;
if (it == m_utf8_view.end())
return {};
return *it;
}
Optional<HTMLToken> HTMLTokenizer::next_token()
{
_StartOfFunction:
if (!m_queued_tokens.is_empty())
return m_queued_tokens.dequeue();
for (;;) {
auto current_input_character = next_code_point();
switch (m_state) {
BEGIN_STATE(Data)
{
ON('&')
{
m_return_state = State::Data;
SWITCH_TO(CharacterReference);
}
ON('<')
{
SWITCH_TO(TagOpen);
}
ON(0)
{
PARSE_ERROR();
EMIT_CURRENT_CHARACTER;
}
ON_EOF
{
EMIT_EOF;
}
ANYTHING_ELSE
{
EMIT_CURRENT_CHARACTER;
}
}
END_STATE
BEGIN_STATE(TagOpen)
{
ON('!')
{
SWITCH_TO(MarkupDeclarationOpen);
}
ON('/')
{
SWITCH_TO(EndTagOpen);
}
ON_ASCII_ALPHA
{
create_new_token(HTMLToken::Type::StartTag);
RECONSUME_IN(TagName);
}
ON('?')
{
PARSE_ERROR();
create_new_token(HTMLToken::Type::Comment);
RECONSUME_IN(BogusComment);
}
ON_EOF
{
PARSE_ERROR();
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
EMIT_EOF;
}
ANYTHING_ELSE
{
PARSE_ERROR();
EMIT_CHARACTER_AND_RECONSUME_IN('<', Data);
}
}
END_STATE
BEGIN_STATE(TagName)
{
ON_WHITESPACE
{
SWITCH_TO(BeforeAttributeName);
}
ON('/')
{
SWITCH_TO(SelfClosingStartTag);
}
ON('>')
{
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_ASCII_UPPER_ALPHA
{
m_current_token.m_tag.tag_name.append(tolower(current_input_character.value()));
continue;
}
ON(0)
{
PARSE_ERROR();
m_current_token.m_tag.tag_name.append_code_point(0xFFFD);
continue;
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_tag.tag_name.append_code_point(current_input_character.value());
continue;
}
}
END_STATE
BEGIN_STATE(EndTagOpen)
{
ON_ASCII_ALPHA
{
create_new_token(HTMLToken::Type::EndTag);
RECONSUME_IN(TagName);
}
ON('>')
{
PARSE_ERROR();
SWITCH_TO(Data);
}
ON_EOF
{
PARSE_ERROR();
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
EMIT_EOF;
}
ANYTHING_ELSE
{
PARSE_ERROR();
create_new_token(HTMLToken::Type::Comment);
RECONSUME_IN(BogusComment);
}
}
END_STATE
BEGIN_STATE(MarkupDeclarationOpen)
{
DONT_CONSUME_NEXT_INPUT_CHARACTER;
if (consume_next_if_match("--")) {
create_new_token(HTMLToken::Type::Comment);
SWITCH_TO(CommentStart);
}
if (consume_next_if_match("DOCTYPE", CaseSensitivity::CaseInsensitive)) {
SWITCH_TO(DOCTYPE);
}
if (consume_next_if_match("[CDATA[")) {
TODO();
}
ANYTHING_ELSE
{
PARSE_ERROR();
create_new_token(HTMLToken::Type::Comment);
SWITCH_TO(BogusComment);
}
}
END_STATE
BEGIN_STATE(BogusComment)
{
ON('>')
{
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ON(0)
{
PARSE_ERROR();
m_current_token.m_comment_or_character.data.append_code_point(0xFFFD);
continue;
}
ANYTHING_ELSE
{
m_current_token.m_comment_or_character.data.append_code_point(current_input_character.value());
continue;
}
}
END_STATE
BEGIN_STATE(DOCTYPE)
{
ON_WHITESPACE
{
SWITCH_TO(BeforeDOCTYPEName);
}
ON('>')
{
RECONSUME_IN(BeforeDOCTYPEName);
}
ON_EOF
{
PARSE_ERROR();
create_new_token(HTMLToken::Type::DOCTYPE);
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
PARSE_ERROR();
RECONSUME_IN(BeforeDOCTYPEName);
}
}
END_STATE
BEGIN_STATE(BeforeDOCTYPEName)
{
ON_WHITESPACE
{
continue;
}
ON_ASCII_UPPER_ALPHA
{
create_new_token(HTMLToken::Type::DOCTYPE);
m_current_token.m_doctype.name.append(tolower(current_input_character.value()));
m_current_token.m_doctype.missing_name = false;
SWITCH_TO(DOCTYPEName);
}
ON(0)
{
PARSE_ERROR();
create_new_token(HTMLToken::Type::DOCTYPE);
m_current_token.m_doctype.name.append_code_point(0xFFFD);
m_current_token.m_doctype.missing_name = false;
SWITCH_TO(DOCTYPEName);
}
ON('>')
{
PARSE_ERROR();
create_new_token(HTMLToken::Type::DOCTYPE);
m_current_token.m_doctype.force_quirks = true;
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
create_new_token(HTMLToken::Type::DOCTYPE);
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
create_new_token(HTMLToken::Type::DOCTYPE);
m_current_token.m_doctype.name.append_code_point(current_input_character.value());
m_current_token.m_doctype.missing_name = false;
SWITCH_TO(DOCTYPEName);
}
}
END_STATE
BEGIN_STATE(DOCTYPEName)
{
ON_WHITESPACE
{
SWITCH_TO(AfterDOCTYPEName);
}
ON('>')
{
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_ASCII_UPPER_ALPHA
{
m_current_token.m_doctype.name.append(tolower(current_input_character.value()));
continue;
}
ON(0)
{
PARSE_ERROR();
m_current_token.m_doctype.name.append_code_point(0xFFFD);
continue;
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_doctype.name.append_code_point(current_input_character.value());
continue;
}
}
END_STATE
BEGIN_STATE(AfterDOCTYPEName)
{
ON_WHITESPACE
{
continue;
}
ON('>')
{
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
if (toupper(current_input_character.value()) == 'P' && consume_next_if_match("UBLIC", CaseSensitivity::CaseInsensitive)) {
SWITCH_TO(AfterDOCTYPEPublicKeyword);
}
if (toupper(current_input_character.value()) == 'S' && consume_next_if_match("YSTEM", CaseSensitivity::CaseInsensitive)) {
SWITCH_TO(AfterDOCTYPESystemKeyword);
}
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
RECONSUME_IN(BogusDOCTYPE);
}
}
END_STATE
BEGIN_STATE(AfterDOCTYPEPublicKeyword)
{
ON_WHITESPACE
{
SWITCH_TO(BeforeDOCTYPEPublicIdentifier);
}
ON('"')
{
PARSE_ERROR();
m_current_token.m_doctype.public_identifier.clear();
m_current_token.m_doctype.missing_public_identifier = false;
SWITCH_TO(DOCTYPEPublicIdentifierDoubleQuoted);
}
ON('\'')
{
PARSE_ERROR();
m_current_token.m_doctype.public_identifier.clear();
m_current_token.m_doctype.missing_public_identifier = false;
SWITCH_TO(DOCTYPEPublicIdentifierSingleQuoted);
}
ON('>')
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
RECONSUME_IN(BogusDOCTYPE);
}
}
END_STATE
BEGIN_STATE(AfterDOCTYPESystemKeyword)
{
ON_WHITESPACE
{
SWITCH_TO(BeforeDOCTYPESystemIdentifier);
}
ON('"')
{
PARSE_ERROR();
m_current_token.m_doctype.system_identifier.clear();
m_current_token.m_doctype.missing_system_identifier = false;
SWITCH_TO(DOCTYPESystemIdentifierDoubleQuoted);
}
ON('\'')
{
PARSE_ERROR();
m_current_token.m_doctype.system_identifier.clear();
m_current_token.m_doctype.missing_system_identifier = false;
SWITCH_TO(DOCTYPESystemIdentifierSingleQuoted);
}
ON('>')
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
RECONSUME_IN(BogusDOCTYPE);
}
}
END_STATE
BEGIN_STATE(BeforeDOCTYPEPublicIdentifier)
{
ON_WHITESPACE
{
continue;
}
ON('"')
{
m_current_token.m_doctype.public_identifier.clear();
m_current_token.m_doctype.missing_public_identifier = false;
SWITCH_TO(DOCTYPEPublicIdentifierDoubleQuoted);
}
ON('\'')
{
m_current_token.m_doctype.public_identifier.clear();
m_current_token.m_doctype.missing_public_identifier = false;
SWITCH_TO(DOCTYPEPublicIdentifierSingleQuoted);
}
ON('>')
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
RECONSUME_IN(BogusDOCTYPE);
}
}
END_STATE
BEGIN_STATE(BeforeDOCTYPESystemIdentifier)
{
ON_WHITESPACE
{
continue;
}
ON('"')
{
m_current_token.m_doctype.system_identifier.clear();
m_current_token.m_doctype.missing_system_identifier = false;
SWITCH_TO(DOCTYPESystemIdentifierDoubleQuoted);
}
ON('\'')
{
m_current_token.m_doctype.system_identifier.clear();
m_current_token.m_doctype.missing_system_identifier = false;
SWITCH_TO(DOCTYPESystemIdentifierSingleQuoted);
}
ON('>')
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
RECONSUME_IN(BogusDOCTYPE);
}
}
END_STATE
BEGIN_STATE(DOCTYPEPublicIdentifierDoubleQuoted)
{
ON('"')
{
SWITCH_TO(AfterDOCTYPEPublicIdentifier);
}
ON(0)
{
PARSE_ERROR();
m_current_token.m_doctype.public_identifier.append_code_point(0xFFFD);
continue;
}
ON('>')
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_doctype.public_identifier.append_code_point(current_input_character.value());
continue;
}
}
END_STATE
BEGIN_STATE(DOCTYPEPublicIdentifierSingleQuoted)
{
ON('\'')
{
SWITCH_TO(AfterDOCTYPEPublicIdentifier);
}
ON(0)
{
PARSE_ERROR();
m_current_token.m_doctype.public_identifier.append_code_point(0xFFFD);
continue;
}
ON('>')
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_doctype.public_identifier.append_code_point(current_input_character.value());
continue;
}
}
END_STATE
BEGIN_STATE(DOCTYPESystemIdentifierDoubleQuoted)
{
ON('"')
{
SWITCH_TO(AfterDOCTYPESystemIdentifier);
}
ON(0)
{
PARSE_ERROR();
m_current_token.m_doctype.system_identifier.append_code_point(0xFFFD);
continue;
}
ON('>')
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_doctype.system_identifier.append_code_point(current_input_character.value());
continue;
}
}
END_STATE
BEGIN_STATE(DOCTYPESystemIdentifierSingleQuoted)
{
ON('\'')
{
SWITCH_TO(AfterDOCTYPESystemIdentifier);
}
ON(0)
{
PARSE_ERROR();
m_current_token.m_doctype.system_identifier.append_code_point(0xFFFD);
continue;
}
ON('>')
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_doctype.system_identifier.append_code_point(current_input_character.value());
continue;
}
}
END_STATE
BEGIN_STATE(AfterDOCTYPEPublicIdentifier)
{
ON_WHITESPACE
{
SWITCH_TO(BetweenDOCTYPEPublicAndSystemIdentifiers);
}
ON('>')
{
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON('"')
{
PARSE_ERROR();
m_current_token.m_doctype.system_identifier.clear();
m_current_token.m_doctype.missing_system_identifier = false;
SWITCH_TO(DOCTYPESystemIdentifierDoubleQuoted);
}
ON('\'')
{
PARSE_ERROR();
m_current_token.m_doctype.system_identifier.clear();
m_current_token.m_doctype.missing_system_identifier = false;
SWITCH_TO(DOCTYPESystemIdentifierSingleQuoted);
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
RECONSUME_IN(BogusDOCTYPE);
}
}
END_STATE
BEGIN_STATE(BetweenDOCTYPEPublicAndSystemIdentifiers)
{
ON_WHITESPACE
{
continue;
}
ON('>')
{
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON('"')
{
m_current_token.m_doctype.system_identifier.clear();
m_current_token.m_doctype.missing_system_identifier = false;
SWITCH_TO(DOCTYPESystemIdentifierDoubleQuoted);
}
ON('\'')
{
m_current_token.m_doctype.system_identifier.clear();
m_current_token.m_doctype.missing_system_identifier = false;
SWITCH_TO(DOCTYPESystemIdentifierSingleQuoted);
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
RECONSUME_IN(BogusDOCTYPE);
}
}
END_STATE
BEGIN_STATE(AfterDOCTYPESystemIdentifier)
{
ON_WHITESPACE
{
continue;
}
ON('>')
{
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
m_current_token.m_doctype.force_quirks = true;
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
PARSE_ERROR();
RECONSUME_IN(BogusDOCTYPE);
}
}
END_STATE
BEGIN_STATE(BogusDOCTYPE)
{
ON('>')
{
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON(0)
{
PARSE_ERROR();
continue;
}
ON_EOF
{
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
continue;
}
}
END_STATE
BEGIN_STATE(BeforeAttributeName)
{
ON_WHITESPACE
{
continue;
}
ON('/')
{
RECONSUME_IN(AfterAttributeName);
}
ON('>')
{
RECONSUME_IN(AfterAttributeName);
}
ON_EOF
{
RECONSUME_IN(AfterAttributeName);
}
ON('=')
{
PARSE_ERROR();
auto new_attribute = HTMLToken::AttributeBuilder();
new_attribute.local_name_builder.append_code_point(current_input_character.value());
m_current_token.m_tag.attributes.append(new_attribute);
SWITCH_TO(AttributeName);
}
ANYTHING_ELSE
{
m_current_token.m_tag.attributes.append(HTMLToken::AttributeBuilder());
RECONSUME_IN(AttributeName);
}
}
END_STATE
BEGIN_STATE(SelfClosingStartTag)
{
ON('>')
{
m_current_token.m_tag.self_closing = true;
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
PARSE_ERROR();
RECONSUME_IN(BeforeAttributeName);
}
}
END_STATE
BEGIN_STATE(AttributeName)
{
ON_WHITESPACE
{
RECONSUME_IN(AfterAttributeName);
}
ON('/')
{
RECONSUME_IN(AfterAttributeName);
}
ON('>')
{
RECONSUME_IN(AfterAttributeName);
}
ON_EOF
{
RECONSUME_IN(AfterAttributeName);
}
ON('=')
{
SWITCH_TO(BeforeAttributeValue);
}
ON_ASCII_UPPER_ALPHA
{
m_current_token.m_tag.attributes.last().local_name_builder.append_code_point(tolower(current_input_character.value()));
continue;
}
ON(0)
{
PARSE_ERROR();
m_current_token.m_tag.attributes.last().local_name_builder.append_code_point(0xFFFD);
continue;
}
ON('"')
{
PARSE_ERROR();
goto AnythingElseAttributeName;
}
ON('\'')
{
PARSE_ERROR();
goto AnythingElseAttributeName;
}
ON('<')
{
PARSE_ERROR();
goto AnythingElseAttributeName;
}
ANYTHING_ELSE
{
AnythingElseAttributeName:
m_current_token.m_tag.attributes.last().local_name_builder.append_code_point(current_input_character.value());
continue;
}
}
END_STATE
BEGIN_STATE(AfterAttributeName)
{
ON_WHITESPACE
{
continue;
}
ON('/')
{
SWITCH_TO(SelfClosingStartTag);
}
ON('=')
{
SWITCH_TO(BeforeAttributeValue);
}
ON('>')
{
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_tag.attributes.append(HTMLToken::AttributeBuilder());
RECONSUME_IN(AttributeName);
}
}
END_STATE
BEGIN_STATE(BeforeAttributeValue)
{
ON_WHITESPACE
{
continue;
}
ON('"')
{
SWITCH_TO(AttributeValueDoubleQuoted);
}
ON('\'')
{
SWITCH_TO(AttributeValueSingleQuoted);
}
ON('>')
{
PARSE_ERROR();
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ANYTHING_ELSE
{
RECONSUME_IN(AttributeValueUnquoted);
}
}
END_STATE
BEGIN_STATE(AttributeValueDoubleQuoted)
{
ON('"')
{
SWITCH_TO(AfterAttributeValueQuoted);
}
ON('&')
{
m_return_state = State::AttributeValueDoubleQuoted;
SWITCH_TO(CharacterReference);
}
ON(0)
{
PARSE_ERROR();
m_current_token.m_tag.attributes.last().value_builder.append_code_point(0xFFFD);
continue;
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_tag.attributes.last().value_builder.append_code_point(current_input_character.value());
continue;
}
}
END_STATE
BEGIN_STATE(AttributeValueSingleQuoted)
{
ON('\'')
{
SWITCH_TO(AfterAttributeValueQuoted);
}
ON('&')
{
m_return_state = State::AttributeValueSingleQuoted;
SWITCH_TO(CharacterReference);
}
ON(0)
{
PARSE_ERROR();
m_current_token.m_tag.attributes.last().value_builder.append_code_point(0xFFFD);
continue;
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_tag.attributes.last().value_builder.append_code_point(current_input_character.value());
continue;
}
}
END_STATE
BEGIN_STATE(AttributeValueUnquoted)
{
ON_WHITESPACE
{
SWITCH_TO(BeforeAttributeName);
}
ON('&')
{
m_return_state = State::AttributeValueUnquoted;
SWITCH_TO(CharacterReference);
}
ON('>')
{
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON(0)
{
PARSE_ERROR();
m_current_token.m_tag.attributes.last().value_builder.append_code_point(0xFFFD);
continue;
}
ON('"')
{
PARSE_ERROR();
goto AnythingElseAttributeValueUnquoted;
}
ON('\'')
{
PARSE_ERROR();
goto AnythingElseAttributeValueUnquoted;
}
ON('<')
{
PARSE_ERROR();
goto AnythingElseAttributeValueUnquoted;
}
ON('=')
{
PARSE_ERROR();
goto AnythingElseAttributeValueUnquoted;
}
ON('`')
{
PARSE_ERROR();
goto AnythingElseAttributeValueUnquoted;
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
AnythingElseAttributeValueUnquoted:
m_current_token.m_tag.attributes.last().value_builder.append_code_point(current_input_character.value());
continue;
}
}
END_STATE
BEGIN_STATE(AfterAttributeValueQuoted)
{
ON_WHITESPACE
{
SWITCH_TO(BeforeAttributeName);
}
ON('/')
{
SWITCH_TO(SelfClosingStartTag);
}
ON('>')
{
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
PARSE_ERROR();
RECONSUME_IN(BeforeAttributeName);
}
}
END_STATE
BEGIN_STATE(CommentStart)
{
ON('-')
{
SWITCH_TO(CommentStartDash);
}
ON('>')
{
PARSE_ERROR();
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ANYTHING_ELSE
{
RECONSUME_IN(Comment);
}
}
END_STATE
BEGIN_STATE(CommentStartDash)
{
ON('-')
{
SWITCH_TO(CommentEnd);
}
ON('>')
{
PARSE_ERROR();
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_comment_or_character.data.append('-');
RECONSUME_IN(Comment);
}
}
END_STATE
BEGIN_STATE(Comment)
{
ON('<')
{
m_current_token.m_comment_or_character.data.append_code_point(current_input_character.value());
SWITCH_TO(CommentLessThanSign);
}
ON('-')
{
SWITCH_TO(CommentEndDash);
}
ON(0)
{
PARSE_ERROR();
m_current_token.m_comment_or_character.data.append_code_point(0xFFFD);
continue;
}
ON_EOF
{
PARSE_ERROR();
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_comment_or_character.data.append_code_point(current_input_character.value());
continue;
}
}
END_STATE
BEGIN_STATE(CommentEnd)
{
ON('>')
{
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON('!')
{
SWITCH_TO(CommentEndBang);
}
ON('-')
{
m_current_token.m_comment_or_character.data.append('-');
continue;
}
ON_EOF
{
PARSE_ERROR();
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_comment_or_character.data.append('-');
RECONSUME_IN(Comment);
}
}
END_STATE
BEGIN_STATE(CommentEndBang)
{
ON('-')
{
m_current_token.m_comment_or_character.data.append("--!");
SWITCH_TO(CommentEndDash);
}
ON('>')
{
PARSE_ERROR();
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_EOF
{
PARSE_ERROR();
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_comment_or_character.data.append("--!");
RECONSUME_IN(Comment);
}
}
END_STATE
BEGIN_STATE(CommentEndDash)
{
ON('-')
{
SWITCH_TO(CommentEnd);
}
ON_EOF
{
PARSE_ERROR();
m_queued_tokens.enqueue(m_current_token);
EMIT_EOF;
}
ANYTHING_ELSE
{
m_current_token.m_comment_or_character.data.append('-');
RECONSUME_IN(Comment);
}
}
END_STATE
BEGIN_STATE(CommentLessThanSign)
{
ON('!')
{
m_current_token.m_comment_or_character.data.append_code_point(current_input_character.value());
SWITCH_TO(CommentLessThanSignBang);
}
ON('<')
{
m_current_token.m_comment_or_character.data.append_code_point(current_input_character.value());
continue;
}
ANYTHING_ELSE
{
RECONSUME_IN(Comment);
}
}
END_STATE
BEGIN_STATE(CommentLessThanSignBang)
{
ON('-')
{
SWITCH_TO(CommentLessThanSignBangDash);
}
ANYTHING_ELSE
{
RECONSUME_IN(Comment);
}
}
END_STATE
BEGIN_STATE(CommentLessThanSignBangDash)
{
ON('-')
{
SWITCH_TO(CommentLessThanSignBangDashDash);
}
ANYTHING_ELSE
{
RECONSUME_IN(CommentEndDash);
}
}
END_STATE
BEGIN_STATE(CommentLessThanSignBangDashDash)
{
ON('>')
{
RECONSUME_IN(CommentEnd);
}
ON_EOF
{
RECONSUME_IN(CommentEnd);
}
ANYTHING_ELSE
{
PARSE_ERROR();
RECONSUME_IN(CommentEnd);
}
}
END_STATE
BEGIN_STATE(CharacterReference)
{
m_temporary_buffer.clear();
m_temporary_buffer.append('&');
ON_ASCII_ALPHANUMERIC
{
RECONSUME_IN(NamedCharacterReference);
}
ON('#')
{
m_temporary_buffer.append(current_input_character.value());
SWITCH_TO(NumericCharacterReference);
}
ANYTHING_ELSE
{
RECONSUME_IN_RETURN_STATE;
}
}
END_STATE
BEGIN_STATE(NamedCharacterReference)
{
size_t byte_offset = m_utf8_view.byte_offset_of(m_prev_utf8_iterator);
auto match = HTML::code_points_from_entity(m_decoded_input.substring_view(byte_offset, m_decoded_input.length() - byte_offset - 1));
if (match.has_value()) {
for (size_t i = 0; i < match.value().entity.length() - 1; ++i) {
m_prev_utf8_iterator = m_utf8_iterator;
++m_utf8_iterator;
}
for (auto ch : match.value().entity)
m_temporary_buffer.append(ch);
if (consumed_as_part_of_an_attribute() && match.value().code_points.last() != ';') {
auto next = peek_code_point(0);
if (next.has_value() && (next.value() == '=' || isalnum(next.value()))) {
FLUSH_CODEPOINTS_CONSUMED_AS_A_CHARACTER_REFERENCE;
SWITCH_TO_RETURN_STATE;
}
}
if (consumed_as_part_of_an_attribute() && match.value().entity.ends_with(';')) {
auto next_code_point = peek_code_point(0);
if (next_code_point.has_value() && next_code_point.value() == '=') {
FLUSH_CODEPOINTS_CONSUMED_AS_A_CHARACTER_REFERENCE;
SWITCH_TO_RETURN_STATE;
}
}
if (!match.value().entity.ends_with(';')) {
PARSE_ERROR();
}
m_temporary_buffer.clear();
m_temporary_buffer.append(match.value().code_points);
FLUSH_CODEPOINTS_CONSUMED_AS_A_CHARACTER_REFERENCE;
SWITCH_TO_RETURN_STATE;
} else {
FLUSH_CODEPOINTS_CONSUMED_AS_A_CHARACTER_REFERENCE;
SWITCH_TO(AmbiguousAmpersand);
}
}
END_STATE
BEGIN_STATE(AmbiguousAmpersand)
{
ON_ASCII_ALPHANUMERIC
{
if (consumed_as_part_of_an_attribute()) {
m_current_token.m_tag.attributes.last().value_builder.append_code_point(current_input_character.value());
continue;
} else {
EMIT_CURRENT_CHARACTER;
}
}
ON(';')
{
PARSE_ERROR();
RECONSUME_IN_RETURN_STATE;
}
ANYTHING_ELSE
{
RECONSUME_IN_RETURN_STATE;
}
}
END_STATE
BEGIN_STATE(NumericCharacterReference)
{
m_character_reference_code = 0;
ON('X')
{
m_temporary_buffer.append(current_input_character.value());
SWITCH_TO(HexadecimalCharacterReferenceStart);
}
ON('x')
{
m_temporary_buffer.append(current_input_character.value());
SWITCH_TO(HexadecimalCharacterReferenceStart);
}
ANYTHING_ELSE
{
RECONSUME_IN(DecimalCharacterReferenceStart);
}
}
END_STATE
BEGIN_STATE(HexadecimalCharacterReferenceStart)
{
ON_ASCII_HEX_DIGIT
{
RECONSUME_IN(HexadecimalCharacterReference);
}
ANYTHING_ELSE
{
PARSE_ERROR();
FLUSH_CODEPOINTS_CONSUMED_AS_A_CHARACTER_REFERENCE;
RECONSUME_IN_RETURN_STATE;
}
}
END_STATE
BEGIN_STATE(DecimalCharacterReferenceStart)
{
ON_ASCII_DIGIT
{
RECONSUME_IN(DecimalCharacterReference);
}
ANYTHING_ELSE
{
PARSE_ERROR();
FLUSH_CODEPOINTS_CONSUMED_AS_A_CHARACTER_REFERENCE;
RECONSUME_IN_RETURN_STATE;
}
}
END_STATE
BEGIN_STATE(HexadecimalCharacterReference)
{
ON_ASCII_DIGIT
{
m_character_reference_code *= 16;
m_character_reference_code += current_input_character.value() - 0x30;
continue;
}
ON_ASCII_UPPER_ALPHA
{
m_character_reference_code *= 16;
m_character_reference_code += current_input_character.value() - 0x37;
continue;
}
ON_ASCII_LOWER_ALPHA
{
m_character_reference_code *= 16;
m_character_reference_code += current_input_character.value() - 0x57;
continue;
}
ON(';')
{
SWITCH_TO(NumericCharacterReferenceEnd);
}
ANYTHING_ELSE
{
PARSE_ERROR();
RECONSUME_IN(NumericCharacterReferenceEnd);
}
}
END_STATE
BEGIN_STATE(DecimalCharacterReference)
{
ON_ASCII_DIGIT
{
m_character_reference_code *= 10;
m_character_reference_code += current_input_character.value() - 0x30;
continue;
}
ON(';')
{
SWITCH_TO(NumericCharacterReferenceEnd);
}
ANYTHING_ELSE
{
PARSE_ERROR();
RECONSUME_IN(NumericCharacterReferenceEnd);
}
}
END_STATE
BEGIN_STATE(NumericCharacterReferenceEnd)
{
DONT_CONSUME_NEXT_INPUT_CHARACTER;
if (m_character_reference_code == 0) {
PARSE_ERROR();
m_character_reference_code = 0xFFFD;
}
if (m_character_reference_code > 0x10ffff) {
PARSE_ERROR();
m_character_reference_code = 0xFFFD;
}
if (is_surrogate(m_character_reference_code)) {
PARSE_ERROR();
m_character_reference_code = 0xFFFD;
}
if (is_noncharacter(m_character_reference_code)) {
PARSE_ERROR();
}
if (m_character_reference_code == 0xd || (is_control(m_character_reference_code) && !isspace(m_character_reference_code))) {
PARSE_ERROR();
constexpr struct {
u32 number;
u32 code_point;
} conversion_table[] = {
{ 0x80, 0x20AC },
{ 0x82, 0x201A },
{ 0x83, 0x0192 },
{ 0x84, 0x201E },
{ 0x85, 0x2026 },
{ 0x86, 0x2020 },
{ 0x87, 0x2021 },
{ 0x88, 0x02C6 },
{ 0x89, 0x2030 },
{ 0x8A, 0x0160 },
{ 0x8B, 0x2039 },
{ 0x8C, 0x0152 },
{ 0x8E, 0x017D },
{ 0x91, 0x2018 },
{ 0x92, 0x2019 },
{ 0x93, 0x201C },
{ 0x94, 0x201D },
{ 0x95, 0x2022 },
{ 0x96, 0x2013 },
{ 0x97, 0x2014 },
{ 0x98, 0x02DC },
{ 0x99, 0x2122 },
{ 0x9A, 0x0161 },
{ 0x9B, 0x203A },
{ 0x9C, 0x0153 },
{ 0x9E, 0x017E },
{ 0x9F, 0x0178 },
};
for (auto& entry : conversion_table) {
if (m_character_reference_code == entry.number) {
m_character_reference_code = entry.code_point;
break;
}
}
}
m_temporary_buffer.clear();
m_temporary_buffer.append(m_character_reference_code);
FLUSH_CODEPOINTS_CONSUMED_AS_A_CHARACTER_REFERENCE;
SWITCH_TO_RETURN_STATE;
}
END_STATE
BEGIN_STATE(RCDATA)
{
ON('&')
{
m_return_state = State::RCDATA;
SWITCH_TO(CharacterReference);
}
ON('<')
{
SWITCH_TO(RCDATALessThanSign);
}
ON(0)
{
PARSE_ERROR();
EMIT_CHARACTER(0xFFFD);
}
ON_EOF
{
EMIT_EOF;
}
ANYTHING_ELSE
{
EMIT_CURRENT_CHARACTER;
}
}
END_STATE
BEGIN_STATE(RCDATALessThanSign)
{
ON('/')
{
m_temporary_buffer.clear();
SWITCH_TO(RCDATAEndTagOpen);
}
ANYTHING_ELSE
{
EMIT_CHARACTER_AND_RECONSUME_IN('<', RCDATA);
}
}
END_STATE
BEGIN_STATE(RCDATAEndTagOpen)
{
ON_ASCII_ALPHA
{
create_new_token(HTMLToken::Type::EndTag);
RECONSUME_IN(RCDATAEndTagName);
}
ANYTHING_ELSE
{
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
RECONSUME_IN(RCDATA);
}
}
END_STATE
BEGIN_STATE(RCDATAEndTagName)
{
ON_WHITESPACE
{
if (!current_end_tag_token_is_appropriate()) {
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer)
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
RECONSUME_IN(RCDATA);
}
SWITCH_TO(BeforeAttributeName);
}
ON('/')
{
if (!current_end_tag_token_is_appropriate()) {
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer)
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
RECONSUME_IN(RCDATA);
}
SWITCH_TO(SelfClosingStartTag);
}
ON('>')
{
if (!current_end_tag_token_is_appropriate()) {
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer)
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
RECONSUME_IN(RCDATA);
}
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_ASCII_UPPER_ALPHA
{
m_current_token.m_tag.tag_name.append(tolower(current_input_character.value()));
m_temporary_buffer.append(current_input_character.value());
continue;
}
ON_ASCII_LOWER_ALPHA
{
m_current_token.m_tag.tag_name.append_code_point(current_input_character.value());
m_temporary_buffer.append(current_input_character.value());
continue;
}
ANYTHING_ELSE
{
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer)
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
RECONSUME_IN(RCDATA);
}
}
END_STATE
BEGIN_STATE(RAWTEXT)
{
ON('<')
{
SWITCH_TO(RAWTEXTLessThanSign);
}
ON(0)
{
PARSE_ERROR();
EMIT_CHARACTER(0xFFFD);
}
ON_EOF
{
EMIT_EOF;
}
ANYTHING_ELSE
{
EMIT_CURRENT_CHARACTER;
}
}
END_STATE
BEGIN_STATE(RAWTEXTLessThanSign)
{
ON('/')
{
m_temporary_buffer.clear();
SWITCH_TO(RAWTEXTEndTagOpen);
}
ANYTHING_ELSE
{
EMIT_CHARACTER_AND_RECONSUME_IN('<', RAWTEXT);
}
}
END_STATE
BEGIN_STATE(RAWTEXTEndTagOpen)
{
ON_ASCII_ALPHA
{
create_new_token(HTMLToken::Type::EndTag);
RECONSUME_IN(RAWTEXTEndTagName);
}
ANYTHING_ELSE
{
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
RECONSUME_IN(RAWTEXT);
}
}
END_STATE
BEGIN_STATE(RAWTEXTEndTagName)
{
ON_WHITESPACE
{
if (!current_end_tag_token_is_appropriate()) {
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer)
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
RECONSUME_IN(RAWTEXT);
}
SWITCH_TO(BeforeAttributeName);
}
ON('/')
{
if (!current_end_tag_token_is_appropriate()) {
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer)
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
RECONSUME_IN(RAWTEXT);
}
SWITCH_TO(SelfClosingStartTag);
}
ON('>')
{
if (!current_end_tag_token_is_appropriate()) {
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer)
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
RECONSUME_IN(RAWTEXT);
}
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
}
ON_ASCII_UPPER_ALPHA
{
m_current_token.m_tag.tag_name.append(tolower(current_input_character.value()));
m_temporary_buffer.append(current_input_character.value());
continue;
}
ON_ASCII_LOWER_ALPHA
{
m_current_token.m_tag.tag_name.append(current_input_character.value());
m_temporary_buffer.append(current_input_character.value());
continue;
}
ANYTHING_ELSE
{
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer)
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
RECONSUME_IN(RAWTEXT);
}
}
END_STATE
BEGIN_STATE(ScriptData)
{
ON('<')
{
SWITCH_TO(ScriptDataLessThanSign);
}
ON(0)
{
PARSE_ERROR();
EMIT_CHARACTER(0xFFFD);
}
ON_EOF
{
EMIT_EOF;
}
ANYTHING_ELSE
{
EMIT_CURRENT_CHARACTER;
}
}
END_STATE
BEGIN_STATE(PLAINTEXT)
{
ON(0)
{
PARSE_ERROR();
EMIT_CHARACTER(0xFFFD);
}
ON_EOF
{
EMIT_EOF;
}
ANYTHING_ELSE
{
EMIT_CURRENT_CHARACTER;
}
}
END_STATE
BEGIN_STATE(ScriptDataLessThanSign)
{
ON('/')
{
m_temporary_buffer.clear();
SWITCH_TO(ScriptDataEndTagOpen);
}
ON('!')
{
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('!'));
SWITCH_TO(ScriptDataEscapeStart);
}
ANYTHING_ELSE
{
EMIT_CHARACTER_AND_RECONSUME_IN('<', ScriptData);
}
}
END_STATE
BEGIN_STATE(ScriptDataEscapeStart)
{
ON('-')
{
SWITCH_TO_AND_EMIT_CHARACTER('-', ScriptDataEscapeStartDash);
}
ANYTHING_ELSE
{
RECONSUME_IN(ScriptData);
}
}
END_STATE
BEGIN_STATE(ScriptDataEscapeStartDash)
{
ON('-')
{
SWITCH_TO_AND_EMIT_CHARACTER('-', ScriptDataEscapedDashDash);
}
ANYTHING_ELSE
{
RECONSUME_IN(ScriptData);
}
}
END_STATE
BEGIN_STATE(ScriptDataEscapedDashDash)
{
ON('-')
{
EMIT_CHARACTER('-');
}
ON('<')
{
SWITCH_TO(ScriptDataEscapedLessThanSign);
}
ON('>')
{
SWITCH_TO_AND_EMIT_CHARACTER('>', ScriptData);
}
ON(0)
{
PARSE_ERROR();
SWITCH_TO_AND_EMIT_CHARACTER(0xFFFD, ScriptDataEscaped);
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataEscaped);
}
}
END_STATE
BEGIN_STATE(ScriptDataEscapedLessThanSign)
{
ON('/')
{
m_temporary_buffer.clear();
SWITCH_TO(ScriptDataEscapedEndTagOpen);
}
ON_ASCII_ALPHA
{
m_temporary_buffer.clear();
EMIT_CHARACTER_AND_RECONSUME_IN('<', ScriptDataDoubleEscapeStart);
}
ANYTHING_ELSE
{
EMIT_CHARACTER_AND_RECONSUME_IN('<', ScriptDataEscaped);
}
}
END_STATE
BEGIN_STATE(ScriptDataEscapedEndTagOpen)
{
ON_ASCII_ALPHA
{
create_new_token(HTMLToken::Type::EndTag);
RECONSUME_IN(ScriptDataEscapedEndTagName);
}
ANYTHING_ELSE
{
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
RECONSUME_IN(ScriptDataEscaped);
}
}
END_STATE
BEGIN_STATE(ScriptDataEscapedEndTagName)
{
ON_WHITESPACE
{
if (current_end_tag_token_is_appropriate())
SWITCH_TO(BeforeAttributeName);
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer) {
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
}
RECONSUME_IN(ScriptDataEscaped);
}
ON('/')
{
if (current_end_tag_token_is_appropriate())
SWITCH_TO(SelfClosingStartTag);
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer) {
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
}
RECONSUME_IN(ScriptDataEscaped);
}
ON('>')
{
if (current_end_tag_token_is_appropriate())
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer) {
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
}
RECONSUME_IN(ScriptDataEscaped);
}
ON_ASCII_UPPER_ALPHA
{
m_current_token.m_tag.tag_name.append(tolower(current_input_character.value()));
m_temporary_buffer.append(current_input_character.value());
continue;
}
ON_ASCII_LOWER_ALPHA
{
m_current_token.m_tag.tag_name.append(current_input_character.value());
m_temporary_buffer.append(current_input_character.value());
continue;
}
ANYTHING_ELSE
{
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer) {
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
}
RECONSUME_IN(ScriptDataEscaped);
}
}
END_STATE
BEGIN_STATE(ScriptDataDoubleEscapeStart)
{
auto temporary_buffer_equal_to_script = [this]() -> bool {
if (m_temporary_buffer.size() != 6)
return false;
// FIXME: Is there a better way of doing this?
return m_temporary_buffer[0] == 's' && m_temporary_buffer[1] == 'c' && m_temporary_buffer[2] == 'r' && m_temporary_buffer[3] == 'i' && m_temporary_buffer[4] == 'p' && m_temporary_buffer[5] == 't';
};
ON_WHITESPACE
{
if (temporary_buffer_equal_to_script())
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataDoubleEscaped);
else
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataEscaped);
}
ON('/')
{
if (temporary_buffer_equal_to_script())
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataDoubleEscaped);
else
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataEscaped);
}
ON('>')
{
if (temporary_buffer_equal_to_script())
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataDoubleEscaped);
else
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataEscaped);
}
ON_ASCII_UPPER_ALPHA
{
m_temporary_buffer.append(tolower(current_input_character.value()));
EMIT_CURRENT_CHARACTER;
}
ON_ASCII_LOWER_ALPHA
{
m_temporary_buffer.append(current_input_character.value());
EMIT_CURRENT_CHARACTER;
}
ANYTHING_ELSE
{
RECONSUME_IN(ScriptDataEscaped);
}
}
END_STATE
BEGIN_STATE(ScriptDataDoubleEscaped)
{
ON('-')
{
SWITCH_TO_AND_EMIT_CHARACTER('-', ScriptDataDoubleEscapedDash);
}
ON('<')
{
SWITCH_TO_AND_EMIT_CHARACTER('<', ScriptDataDoubleEscapedLessThanSign);
}
ON(0)
{
PARSE_ERROR();
EMIT_CHARACTER(0xFFFD);
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
EMIT_CURRENT_CHARACTER;
}
}
END_STATE
BEGIN_STATE(ScriptDataDoubleEscapedDash)
{
ON('-')
{
SWITCH_TO_AND_EMIT_CHARACTER('-', ScriptDataDoubleEscapedDashDash);
}
ON('<')
{
SWITCH_TO_AND_EMIT_CHARACTER('<', ScriptDataDoubleEscapedLessThanSign);
}
ON(0)
{
PARSE_ERROR();
SWITCH_TO_AND_EMIT_CHARACTER(0xFFFD, ScriptDataDoubleEscaped);
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataDoubleEscaped);
}
}
END_STATE
BEGIN_STATE(ScriptDataDoubleEscapedDashDash)
{
ON('-')
{
EMIT_CHARACTER('-');
}
ON('<')
{
SWITCH_TO_AND_EMIT_CHARACTER('<', ScriptDataDoubleEscapedLessThanSign);
}
ON('>')
{
SWITCH_TO_AND_EMIT_CHARACTER('>', ScriptData);
}
ON(0)
{
PARSE_ERROR();
SWITCH_TO_AND_EMIT_CHARACTER(0xFFFD, ScriptDataDoubleEscaped);
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataDoubleEscaped);
}
}
END_STATE
BEGIN_STATE(ScriptDataDoubleEscapedLessThanSign)
{
ON('/')
{
m_temporary_buffer.clear();
SWITCH_TO_AND_EMIT_CHARACTER('/', ScriptDataDoubleEscapeEnd);
}
ANYTHING_ELSE
{
RECONSUME_IN(ScriptDataDoubleEscaped);
}
}
END_STATE
BEGIN_STATE(ScriptDataDoubleEscapeEnd)
{
auto temporary_buffer_equal_to_script = [this]() -> bool {
if (m_temporary_buffer.size() != 6)
return false;
// FIXME: Is there a better way of doing this?
return m_temporary_buffer[0] == 's' && m_temporary_buffer[1] == 'c' && m_temporary_buffer[2] == 'r' && m_temporary_buffer[3] == 'i' && m_temporary_buffer[4] == 'p' && m_temporary_buffer[5] == 't';
};
ON_WHITESPACE
{
if (temporary_buffer_equal_to_script())
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataEscaped);
else
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataDoubleEscaped);
}
ON('/')
{
if (temporary_buffer_equal_to_script())
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataEscaped);
else
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataDoubleEscaped);
}
ON('>')
{
if (temporary_buffer_equal_to_script())
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataEscaped);
else
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataDoubleEscaped);
}
ON_ASCII_UPPER_ALPHA
{
m_temporary_buffer.append(tolower(current_input_character.value()));
EMIT_CURRENT_CHARACTER;
}
ON_ASCII_LOWER_ALPHA
{
m_temporary_buffer.append(current_input_character.value());
EMIT_CURRENT_CHARACTER;
}
ANYTHING_ELSE
{
RECONSUME_IN(ScriptDataDoubleEscaped);
}
}
END_STATE
BEGIN_STATE(ScriptDataEscapedDash)
{
ON('-')
{
SWITCH_TO_AND_EMIT_CHARACTER('-', ScriptDataEscapedDashDash);
}
ON('<')
{
SWITCH_TO(ScriptDataEscapedLessThanSign);
}
ON(0)
{
PARSE_ERROR();
SWITCH_TO_AND_EMIT_CHARACTER(0xFFFD, ScriptDataEscaped);
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
SWITCH_TO_AND_EMIT_CURRENT_CHARACTER(ScriptDataEscaped);
}
}
END_STATE
BEGIN_STATE(ScriptDataEscaped)
{
ON('-')
{
SWITCH_TO_AND_EMIT_CHARACTER('-', ScriptDataEscapedDash);
}
ON('<')
{
SWITCH_TO(ScriptDataEscapedLessThanSign);
}
ON(0)
{
PARSE_ERROR();
EMIT_CHARACTER(0xFFFD);
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
EMIT_CURRENT_CHARACTER;
}
}
END_STATE
BEGIN_STATE(ScriptDataEndTagOpen)
{
ON_ASCII_ALPHA
{
create_new_token(HTMLToken::Type::EndTag);
RECONSUME_IN(ScriptDataEndTagName);
}
ANYTHING_ELSE
{
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
RECONSUME_IN(ScriptData);
}
}
END_STATE
BEGIN_STATE(ScriptDataEndTagName)
{
ON_WHITESPACE
{
if (current_end_tag_token_is_appropriate())
SWITCH_TO(BeforeAttributeName);
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer)
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
RECONSUME_IN(ScriptData);
}
ON('/')
{
if (current_end_tag_token_is_appropriate())
SWITCH_TO(SelfClosingStartTag);
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer)
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
RECONSUME_IN(ScriptData);
}
ON('>')
{
if (current_end_tag_token_is_appropriate())
SWITCH_TO_AND_EMIT_CURRENT_TOKEN(Data);
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer)
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
RECONSUME_IN(ScriptData);
}
ON_ASCII_UPPER_ALPHA
{
m_current_token.m_tag.tag_name.append(tolower(current_input_character.value()));
m_temporary_buffer.append(current_input_character.value());
continue;
}
ON_ASCII_LOWER_ALPHA
{
m_current_token.m_tag.tag_name.append(current_input_character.value());
m_temporary_buffer.append(current_input_character.value());
continue;
}
ANYTHING_ELSE
{
m_queued_tokens.enqueue(HTMLToken::make_character('<'));
m_queued_tokens.enqueue(HTMLToken::make_character('/'));
for (auto code_point : m_temporary_buffer)
m_queued_tokens.enqueue(HTMLToken::make_character(code_point));
RECONSUME_IN(ScriptData);
}
}
END_STATE
BEGIN_STATE(CDATASection)
{
ON(']')
{
SWITCH_TO(CDATASectionBracket);
}
ON_EOF
{
PARSE_ERROR();
EMIT_EOF;
}
ANYTHING_ELSE
{
EMIT_CURRENT_CHARACTER;
}
}
END_STATE
BEGIN_STATE(CDATASectionBracket)
{
ON(']')
{
SWITCH_TO(CDATASectionEnd);
}
ANYTHING_ELSE
{
EMIT_CHARACTER_AND_RECONSUME_IN(']', CDATASection);
}
}
END_STATE
BEGIN_STATE(CDATASectionEnd)
{
ON(']')
{
EMIT_CHARACTER(']');
}
ON('>')
{
SWITCH_TO(Data);
}
ANYTHING_ELSE
{
m_queued_tokens.enqueue(HTMLToken::make_character(']'));
m_queued_tokens.enqueue(HTMLToken::make_character(']'));
RECONSUME_IN(CDATASection);
}
}
END_STATE
default:
TODO();
}
}
}
bool HTMLTokenizer::consume_next_if_match(const StringView& string, CaseSensitivity case_sensitivity)
{
for (size_t i = 0; i < string.length(); ++i) {
auto code_point = peek_code_point(i);
if (!code_point.has_value())
return false;
// FIXME: This should be more Unicode-aware.
if (case_sensitivity == CaseSensitivity::CaseInsensitive) {
if (code_point.value() < 0x80) {
if (tolower(code_point.value()) != tolower(string[i]))
return false;
continue;
}
}
if (code_point.value() != (u32)string[i])
return false;
}
for (size_t i = 0; i < string.length(); ++i) {
m_prev_utf8_iterator = m_utf8_iterator;
++m_utf8_iterator;
}
return true;
}
void HTMLTokenizer::create_new_token(HTMLToken::Type type)
{
m_current_token = {};
m_current_token.m_type = type;
}
HTMLTokenizer::HTMLTokenizer(const StringView& input, const String& encoding)
{
auto* decoder = TextCodec::decoder_for(encoding);
ASSERT(decoder);
m_decoded_input = decoder->to_utf8(input);
m_utf8_view = Utf8View(m_decoded_input);
m_utf8_iterator = m_utf8_view.begin();
}
void HTMLTokenizer::will_switch_to([[maybe_unused]] State new_state)
{
#ifdef TOKENIZER_TRACE
dbg() << "[" << state_name(m_state) << "] Switch to " << state_name(new_state);
#endif
}
void HTMLTokenizer::will_reconsume_in([[maybe_unused]] State new_state)
{
#ifdef TOKENIZER_TRACE
dbg() << "[" << state_name(m_state) << "] Reconsume in " << state_name(new_state);
#endif
}
void HTMLTokenizer::switch_to(Badge<HTMLDocumentParser>, State new_state)
{
#ifdef TOKENIZER_TRACE
dbg() << "[" << state_name(m_state) << "] Parser switches tokenizer state to " << state_name(new_state);
#endif
m_state = new_state;
}
void HTMLTokenizer::will_emit(HTMLToken& token)
{
if (token.is_start_tag())
m_last_emitted_start_tag = token;
}
bool HTMLTokenizer::current_end_tag_token_is_appropriate() const
{
ASSERT(m_current_token.is_end_tag());
if (!m_last_emitted_start_tag.is_start_tag())
return false;
return m_current_token.tag_name() == m_last_emitted_start_tag.tag_name();
}
bool HTMLTokenizer::consumed_as_part_of_an_attribute() const
{
return m_return_state == State::AttributeValueUnquoted || m_return_state == State::AttributeValueSingleQuoted || m_return_state == State::AttributeValueDoubleQuoted;
}
}
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