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ladybird/Userland/Libraries/LibWeb/HTML/Parser/HTMLParser.h
Lorenz Steinert db789813c9 LibWeb: Add basic support for dynamic markup insertion 
This implements basic support for dynamic markup insertion, adding
 * Document::open()
 * Document::write(Vector<String> const&)
 * Document::writeln(Vector<String> const&)
 * Document::close()

The HTMLParser is modified to make it possible to create a
script-created parser which initially only contains a HTMLTokenizer
without any data. Aditionally the HTMLParser::run method gains an
overload which does not modify the Document and does not run
HTMLParser::the_end() so that we can reenter the parser at a later time.
Furthermore all FIXMEs that consern the insertion point are implemented
wich is defined in the HTMLTokenizer. Additionally the following
member-variables of the HTMLParser are now exposed by getter funcions:
 * m_tokenizer
 * m_aborted
 * m_script_nesting_level

The HTMLTokenizer is modified so that it contains an insertion
point which keeps track of where the next input from the Document::write
functions will be inserted. The insertion point is implemented as the
charakter offset into m_decoded_input and a boolean describing if the
insertion point is defined. Functions to update, check and {re}store the
insertion point are also added.
The function HTMLTokenizer::insert_eof is added to tell a script-created
parser that document::close was called and HTMLParser::the_end() should
be called.
Lastly an explicit default constructor is added to HTMLTokenizer to
create a empty HTMLTokenizer into which data can be inserted.
2022-02-21 18:26:43 +01:00

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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/NonnullRefPtrVector.h>
#include <LibWeb/DOM/Node.h>
#include <LibWeb/HTML/Parser/HTMLTokenizer.h>
#include <LibWeb/HTML/Parser/ListOfActiveFormattingElements.h>
#include <LibWeb/HTML/Parser/StackOfOpenElements.h>
namespace Web::HTML {
#define ENUMERATE_INSERTION_MODES \
__ENUMERATE_INSERTION_MODE(Initial) \
__ENUMERATE_INSERTION_MODE(BeforeHTML) \
__ENUMERATE_INSERTION_MODE(BeforeHead) \
__ENUMERATE_INSERTION_MODE(InHead) \
__ENUMERATE_INSERTION_MODE(InHeadNoscript) \
__ENUMERATE_INSERTION_MODE(AfterHead) \
__ENUMERATE_INSERTION_MODE(InBody) \
__ENUMERATE_INSERTION_MODE(Text) \
__ENUMERATE_INSERTION_MODE(InTable) \
__ENUMERATE_INSERTION_MODE(InTableText) \
__ENUMERATE_INSERTION_MODE(InCaption) \
__ENUMERATE_INSERTION_MODE(InColumnGroup) \
__ENUMERATE_INSERTION_MODE(InTableBody) \
__ENUMERATE_INSERTION_MODE(InRow) \
__ENUMERATE_INSERTION_MODE(InCell) \
__ENUMERATE_INSERTION_MODE(InSelect) \
__ENUMERATE_INSERTION_MODE(InSelectInTable) \
__ENUMERATE_INSERTION_MODE(InTemplate) \
__ENUMERATE_INSERTION_MODE(AfterBody) \
__ENUMERATE_INSERTION_MODE(InFrameset) \
__ENUMERATE_INSERTION_MODE(AfterFrameset) \
__ENUMERATE_INSERTION_MODE(AfterAfterBody) \
__ENUMERATE_INSERTION_MODE(AfterAfterFrameset)
RefPtr<DOM::Document> parse_html_document(StringView, const AK::URL&, const String& encoding);
class HTMLParser {
friend class HTMLTokenizer;
public:
HTMLParser(DOM::Document&, StringView input, const String& encoding);
HTMLParser(DOM::Document&);
~HTMLParser();
static NonnullOwnPtr<HTMLParser> create_with_uncertain_encoding(DOM::Document&, const ByteBuffer& input);
void run();
void run(const AK::URL&);
DOM::Document& document();
static NonnullRefPtrVector<DOM::Node> parse_html_fragment(DOM::Element& context_element, StringView);
static String serialize_html_fragment(DOM::Node const& node);
enum class InsertionMode {
#define __ENUMERATE_INSERTION_MODE(mode) mode,
ENUMERATE_INSERTION_MODES
#undef __ENUMERATE_INSERTION_MODE
};
InsertionMode insertion_mode() const { return m_insertion_mode; }
static bool is_special_tag(const FlyString& tag_name, const FlyString& namespace_);
HTMLTokenizer& tokenizer() { return m_tokenizer; }
bool aborted() const { return m_aborted; }
size_t script_nesting_level() const { return m_script_nesting_level; }
private:
const char* insertion_mode_name() const;
DOM::QuirksMode which_quirks_mode(const HTMLToken&) const;
void handle_initial(HTMLToken&);
void handle_before_html(HTMLToken&);
void handle_before_head(HTMLToken&);
void handle_in_head(HTMLToken&);
void handle_in_head_noscript(HTMLToken&);
void handle_after_head(HTMLToken&);
void handle_in_body(HTMLToken&);
void handle_after_body(HTMLToken&);
void handle_after_after_body(HTMLToken&);
void handle_text(HTMLToken&);
void handle_in_table(HTMLToken&);
void handle_in_table_body(HTMLToken&);
void handle_in_row(HTMLToken&);
void handle_in_cell(HTMLToken&);
void handle_in_table_text(HTMLToken&);
void handle_in_select_in_table(HTMLToken&);
void handle_in_select(HTMLToken&);
void handle_in_caption(HTMLToken&);
void handle_in_column_group(HTMLToken&);
void handle_in_template(HTMLToken&);
void handle_in_frameset(HTMLToken&);
void handle_after_frameset(HTMLToken&);
void handle_after_after_frameset(HTMLToken&);
void the_end();
void stop_parsing() { m_stop_parsing = true; }
void generate_implied_end_tags(const FlyString& exception = {});
void generate_all_implied_end_tags_thoroughly();
NonnullRefPtr<DOM::Element> create_element_for(const HTMLToken&, const FlyString& namespace_);
struct AdjustedInsertionLocation {
RefPtr<DOM::Node> parent;
RefPtr<DOM::Node> insert_before_sibling;
};
AdjustedInsertionLocation find_appropriate_place_for_inserting_node();
DOM::Text* find_character_insertion_node();
void flush_character_insertions();
NonnullRefPtr<DOM::Element> insert_foreign_element(const HTMLToken&, const FlyString&);
NonnullRefPtr<DOM::Element> insert_html_element(const HTMLToken&);
DOM::Element& current_node();
DOM::Element& adjusted_current_node();
DOM::Element& node_before_current_node();
void insert_character(u32 data);
void insert_comment(HTMLToken&);
void reconstruct_the_active_formatting_elements();
void close_a_p_element();
void process_using_the_rules_for(InsertionMode, HTMLToken&);
void process_using_the_rules_for_foreign_content(HTMLToken&);
void parse_generic_raw_text_element(HTMLToken&);
void increment_script_nesting_level();
void decrement_script_nesting_level();
void reset_the_insertion_mode_appropriately();
void adjust_mathml_attributes(HTMLToken&);
void adjust_svg_tag_names(HTMLToken&);
void adjust_svg_attributes(HTMLToken&);
void adjust_foreign_attributes(HTMLToken&);
enum AdoptionAgencyAlgorithmOutcome {
DoNothing,
RunAnyOtherEndTagSteps,
};
AdoptionAgencyAlgorithmOutcome run_the_adoption_agency_algorithm(HTMLToken&);
void clear_the_stack_back_to_a_table_context();
void clear_the_stack_back_to_a_table_body_context();
void clear_the_stack_back_to_a_table_row_context();
void close_the_cell();
InsertionMode m_insertion_mode { InsertionMode::Initial };
InsertionMode m_original_insertion_mode { InsertionMode::Initial };
StackOfOpenElements m_stack_of_open_elements;
Vector<InsertionMode> m_stack_of_template_insertion_modes;
ListOfActiveFormattingElements m_list_of_active_formatting_elements;
HTMLTokenizer m_tokenizer;
bool m_foster_parenting { false };
bool m_frameset_ok { true };
bool m_parsing_fragment { false };
bool m_scripting_enabled { true };
bool m_invoked_via_document_write { false };
bool m_aborted { false };
bool m_parser_pause_flag { false };
bool m_stop_parsing { false };
size_t m_script_nesting_level { 0 };
NonnullRefPtr<DOM::Document> m_document;
RefPtr<HTMLHeadElement> m_head_element;
RefPtr<HTMLFormElement> m_form_element;
RefPtr<DOM::Element> m_context_element;
Vector<HTMLToken> m_pending_table_character_tokens;
RefPtr<DOM::Text> m_character_insertion_node;
StringBuilder m_character_insertion_builder;
};
}
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