mirror of
https://github.com/RGBCube/serenity
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fd1b31d0ff
This patch adds a new HTMLDocumentParser class. It keeps a tokenizer object internally and feeds itself with one token at a time from it. The names and idioms in this class are expressed as closely to the actual HTML parsing spec as possible, to make development as easy and bug free as possible. :^) This is going to become pretty large, but it's pretty cool!
160 lines
8.6 KiB
C++
160 lines
8.6 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/StringView.h>
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#include <AK/Types.h>
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#include <LibWeb/Parser/HTMLToken.h>
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#define ENUMERATE_TOKENIZER_STATES \
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__ENUMERATE_TOKENIZER_STATE(Data) \
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__ENUMERATE_TOKENIZER_STATE(RCDATA) \
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__ENUMERATE_TOKENIZER_STATE(RAWTEXT) \
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__ENUMERATE_TOKENIZER_STATE(ScriptData) \
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__ENUMERATE_TOKENIZER_STATE(PLAINTEXT) \
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__ENUMERATE_TOKENIZER_STATE(TagOpen) \
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__ENUMERATE_TOKENIZER_STATE(EndTagOpen) \
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__ENUMERATE_TOKENIZER_STATE(TagName) \
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__ENUMERATE_TOKENIZER_STATE(RCDATALessThanSign) \
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__ENUMERATE_TOKENIZER_STATE(RCDATAEndTagOpen) \
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__ENUMERATE_TOKENIZER_STATE(RCDATAEndTagName) \
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__ENUMERATE_TOKENIZER_STATE(RAWTEXTLessThanSign) \
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__ENUMERATE_TOKENIZER_STATE(RAWTEXTEndTagOpen) \
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__ENUMERATE_TOKENIZER_STATE(RAWTEXTEndTagName) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataLessThanSign) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataEndTagOpen) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataEndTagName) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataEscapeStart) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataEscapeStartDash) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataEscaped) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataEscapedDash) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataEscapedDashDash) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataEscapedLessThanSign) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataEscapedEndTagOpen) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataEscapedEndTagName) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataDoubleEscapeStart) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataDoubleEscaped) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataDoubleEscapedDash) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataDoubleEscapedDashDash) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataDoubleEscapedLessThanSign) \
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__ENUMERATE_TOKENIZER_STATE(ScriptDataDoubleEscapeEnd) \
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__ENUMERATE_TOKENIZER_STATE(BeforeAttributeName) \
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__ENUMERATE_TOKENIZER_STATE(AttributeName) \
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__ENUMERATE_TOKENIZER_STATE(AfterAttributeName) \
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__ENUMERATE_TOKENIZER_STATE(BeforeAttributeValue) \
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__ENUMERATE_TOKENIZER_STATE(AttributeValueDoubleQuoted) \
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__ENUMERATE_TOKENIZER_STATE(AttributeValueSingleQuoted) \
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__ENUMERATE_TOKENIZER_STATE(AttributeValueUnquoted) \
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__ENUMERATE_TOKENIZER_STATE(AfterAttributeValueQuoted) \
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__ENUMERATE_TOKENIZER_STATE(SelfClosingStartTag) \
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__ENUMERATE_TOKENIZER_STATE(BogusComment) \
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__ENUMERATE_TOKENIZER_STATE(MarkupDeclarationOpen) \
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__ENUMERATE_TOKENIZER_STATE(CommentStart) \
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__ENUMERATE_TOKENIZER_STATE(CommentStartDash) \
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__ENUMERATE_TOKENIZER_STATE(Comment) \
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__ENUMERATE_TOKENIZER_STATE(CommentLessThanSign) \
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__ENUMERATE_TOKENIZER_STATE(CommentLessThanSignBang) \
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__ENUMERATE_TOKENIZER_STATE(CommentLessThanSignBangDash) \
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__ENUMERATE_TOKENIZER_STATE(CommentLessThanSignBangDashDash) \
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__ENUMERATE_TOKENIZER_STATE(CommentEndDash) \
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__ENUMERATE_TOKENIZER_STATE(CommentEnd) \
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__ENUMERATE_TOKENIZER_STATE(CommentEndBang) \
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__ENUMERATE_TOKENIZER_STATE(DOCTYPE) \
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__ENUMERATE_TOKENIZER_STATE(BeforeDOCTYPEName) \
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__ENUMERATE_TOKENIZER_STATE(DOCTYPEName) \
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__ENUMERATE_TOKENIZER_STATE(AfterDOCTYPEName) \
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__ENUMERATE_TOKENIZER_STATE(AfterDOCTYPEPublicKeyword) \
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__ENUMERATE_TOKENIZER_STATE(BeforeDOCTYPEPublicIdentifier) \
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__ENUMERATE_TOKENIZER_STATE(DOCTYPEPublicIdentifierDoubleQuoted) \
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__ENUMERATE_TOKENIZER_STATE(DOCTYPEPublicIdentifierSingleQuoted) \
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__ENUMERATE_TOKENIZER_STATE(AfterDOCTYPEPublicIdentifier) \
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__ENUMERATE_TOKENIZER_STATE(BetweenDOCTYPEPublicAndSystemIdentifiers) \
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__ENUMERATE_TOKENIZER_STATE(AfterDOCTYPESystemKeyword) \
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__ENUMERATE_TOKENIZER_STATE(BeforeDOCTYPESystemIdentifier) \
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__ENUMERATE_TOKENIZER_STATE(DOCTYPESystemIdentifierDoubleQuoted) \
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__ENUMERATE_TOKENIZER_STATE(DOCTYPESystemIdentifierSingleQuoted) \
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__ENUMERATE_TOKENIZER_STATE(AfterDOCTYPESystemIdentifier) \
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__ENUMERATE_TOKENIZER_STATE(BogusDOCTYPE) \
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__ENUMERATE_TOKENIZER_STATE(CDATASection) \
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__ENUMERATE_TOKENIZER_STATE(CDATASectionBracket) \
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__ENUMERATE_TOKENIZER_STATE(CDATASectionEnd) \
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__ENUMERATE_TOKENIZER_STATE(CharacterReference) \
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__ENUMERATE_TOKENIZER_STATE(NamedCharacterReference) \
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__ENUMERATE_TOKENIZER_STATE(AmbiguousAmpersand) \
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__ENUMERATE_TOKENIZER_STATE(NumericCharacterReference) \
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__ENUMERATE_TOKENIZER_STATE(HexadecimalCharacterReferenceStart) \
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__ENUMERATE_TOKENIZER_STATE(DecimalCharacterReferenceStart) \
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__ENUMERATE_TOKENIZER_STATE(HexadecimalCharacterReference) \
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__ENUMERATE_TOKENIZER_STATE(DecimalCharacterReference) \
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__ENUMERATE_TOKENIZER_STATE(NumericCharacterReferenceEnd)
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namespace Web {
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class HTMLTokenizer {
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public:
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explicit HTMLTokenizer(const StringView& input);
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Optional<HTMLToken> next_token();
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private:
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Optional<u32> next_codepoint();
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Optional<u32> peek_codepoint(size_t offset) const;
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bool next_few_characters_are(const StringView&) const;
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void consume(const StringView&);
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void create_new_token(HTMLToken::Type);
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enum class State {
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#define __ENUMERATE_TOKENIZER_STATE(state) state,
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ENUMERATE_TOKENIZER_STATES
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#undef __ENUMERATE_TOKENIZER_STATE
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};
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static const char* state_name(State state)
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{
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switch (state) {
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#define __ENUMERATE_TOKENIZER_STATE(state) \
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case State::state: \
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return #state;
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ENUMERATE_TOKENIZER_STATES
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#undef __ENUMERATE_TOKENIZER_STATE
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};
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ASSERT_NOT_REACHED();
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}
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void will_switch_to(State);
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void will_reconsume_in(State);
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void flush_current_character_or_comment_if_needed();
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State m_state { State::Data };
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State m_return_state { State::Data };
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StringView m_input;
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size_t m_cursor { 0 };
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HTMLToken m_current_token;
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};
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}
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