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/*
* Copyright (c) 2020-2021, the SerenityOS developers.
* Copyright (c) 2021, Sam Atkins <atkinssj@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/NonnullOwnPtrVector.h>
#include <AK/NonnullRefPtrVector.h>
#include <AK/RefPtr.h>
#include <AK/Result.h>
#include <AK/Vector.h>
#include <LibWeb/CSS/Parser/DeclarationOrAtRule.h>
#include <LibWeb/CSS/Parser/StyleBlockRule.h>
#include <LibWeb/CSS/Parser/StyleComponentValueRule.h>
#include <LibWeb/CSS/Parser/StyleDeclarationRule.h>
#include <LibWeb/CSS/Parser/StyleFunctionRule.h>
#include <LibWeb/CSS/Parser/StyleRule.h>
#include <LibWeb/CSS/Parser/Tokenizer.h>
#include <LibWeb/CSS/Selector.h>
#include <LibWeb/CSS/StyleValue.h>
namespace Web::CSS {
class CSSStyleSheet;
class CSSRule;
class CSSStyleRule;
struct StyleProperty;
enum class PropertyID;
class ParsingContext {
public:
ParsingContext();
explicit ParsingContext(DOM::Document&);
explicit ParsingContext(DOM::ParentNode&);
bool in_quirks_mode() const;
DOM::Document* document() const { return m_document; }
URL complete_url(String const&) const;
private:
DOM::Document* m_document { nullptr };
};
template<typename T>
class TokenStream {
public:
explicit TokenStream(Vector<T> const&);
~TokenStream();
bool has_next_token();
T const& next_token();
T const& peek_token(int offset = 0);
T const& current_token();
void reconsume_current_input_token();
void skip_whitespace();
void dump_all_tokens();
private:
Vector<T> const& m_tokens;
int m_iterator_offset { -1 };
T make_eof();
T m_eof;
};
class Parser {
public:
Parser(ParsingContext const&, StringView const& input, String const& encoding = "utf-8");
~Parser();
// The normal parser entry point, for parsing stylesheets.
NonnullRefPtr<CSSStyleSheet> parse_as_stylesheet();
template<typename T>
NonnullRefPtr<CSSStyleSheet> parse_as_stylesheet(TokenStream<T>&);
// For the content of at-rules such as @media. It differs from "Parse a stylesheet" in the handling of <CDO-token> and <CDC-token>.
NonnullRefPtrVector<CSSRule> parse_as_list_of_rules();
template<typename T>
NonnullRefPtrVector<CSSRule> parse_as_list_of_rules(TokenStream<T>&);
// For use by the CSSStyleSheet#insertRule method, and similar functions which might exist, which parse text into a single rule.
RefPtr<CSSRule> parse_as_rule();
template<typename T>
RefPtr<CSSRule> parse_as_rule(TokenStream<T>&);
// Used in @supports conditions. [CSS3-CONDITIONAL]
Optional<StyleProperty> parse_as_declaration();
template<typename T>
Optional<StyleProperty> parse_as_declaration(TokenStream<T>&);
// For the contents of a style attribute, which parses text into the contents of a single style rule.
RefPtr<CSSStyleDeclaration> parse_as_list_of_declarations();
template<typename T>
RefPtr<CSSStyleDeclaration> parse_as_list_of_declarations(TokenStream<T>&);
// For things that need to consume a single value, like the parsing rules for attr().
Optional<StyleComponentValueRule> parse_as_component_value();
template<typename T>
Optional<StyleComponentValueRule> parse_as_component_value(TokenStream<T>&);
// For the contents of presentational attributes, which parse text into a single declaration’s value, or for parsing a stand-alone selector [SELECT] or list of Media Queries [MEDIAQ], as in Selectors API or the media HTML attribute.
Vector<StyleComponentValueRule> parse_as_list_of_component_values();
template<typename T>
Vector<StyleComponentValueRule> parse_as_list_of_component_values(TokenStream<T>&);
Vector<Vector<StyleComponentValueRule>> parse_as_comma_separated_list_of_component_values();
template<typename T>
Vector<Vector<StyleComponentValueRule>> parse_as_comma_separated_list_of_component_values(TokenStream<T>&);
Optional<Selector::SimpleSelector::ANPlusBPattern> parse_a_n_plus_b_pattern(TokenStream<StyleComponentValueRule>&);
// FIXME: https://www.w3.org/TR/selectors-4/
// Contrary to the name, these parse a comma-separated list of selectors, according to the spec.
Optional<SelectorList> parse_a_selector();
template<typename T>
Optional<SelectorList> parse_a_selector(TokenStream<T>&);
Optional<SelectorList> parse_a_relative_selector();
template<typename T>
Optional<SelectorList> parse_a_relative_selector(TokenStream<T>&);
RefPtr<StyleValue> parse_css_value(PropertyID, TokenStream<StyleComponentValueRule>&);
static RefPtr<StyleValue> parse_css_value(ParsingContext const&, PropertyID, StyleComponentValueRule const&);
private:
[[nodiscard]] NonnullRefPtrVector<StyleRule> consume_a_list_of_rules(bool top_level);
template<typename T>
[[nodiscard]] NonnullRefPtrVector<StyleRule> consume_a_list_of_rules(TokenStream<T>&, bool top_level);
[[nodiscard]] NonnullRefPtr<StyleRule> consume_an_at_rule();
template<typename T>
[[nodiscard]] NonnullRefPtr<StyleRule> consume_an_at_rule(TokenStream<T>&);
[[nodiscard]] RefPtr<StyleRule> consume_a_qualified_rule();
template<typename T>
[[nodiscard]] RefPtr<StyleRule> consume_a_qualified_rule(TokenStream<T>&);
[[nodiscard]] Vector<DeclarationOrAtRule> consume_a_list_of_declarations();
template<typename T>
[[nodiscard]] Vector<DeclarationOrAtRule> consume_a_list_of_declarations(TokenStream<T>&);
[[nodiscard]] Optional<StyleDeclarationRule> consume_a_declaration();
template<typename T>
[[nodiscard]] Optional<StyleDeclarationRule> consume_a_declaration(TokenStream<T>&);
[[nodiscard]] StyleComponentValueRule consume_a_component_value();
template<typename T>
[[nodiscard]] StyleComponentValueRule consume_a_component_value(TokenStream<T>&);
[[nodiscard]] NonnullRefPtr<StyleBlockRule> consume_a_simple_block();
template<typename T>
[[nodiscard]] NonnullRefPtr<StyleBlockRule> consume_a_simple_block(TokenStream<T>&);
[[nodiscard]] NonnullRefPtr<StyleFunctionRule> consume_a_function();
template<typename T>
[[nodiscard]] NonnullRefPtr<StyleFunctionRule> consume_a_function(TokenStream<T>&);
[[nodiscard]] RefPtr<CSSRule> convert_to_rule(NonnullRefPtr<StyleRule>);
[[nodiscard]] RefPtr<CSSStyleDeclaration> convert_to_declaration(NonnullRefPtr<StyleBlockRule>);
[[nodiscard]] Optional<StyleProperty> convert_to_style_property(StyleDeclarationRule&);
static Optional<float> try_parse_float(StringView string);
static Optional<Color> parse_color(ParsingContext const&, StyleComponentValueRule const&);
static Optional<Length> parse_length(ParsingContext const&, StyleComponentValueRule const&);
static Optional<URL> parse_url_function(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_builtin_or_dynamic_value(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_length_value(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_numeric_value(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_identifier_value(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_color_value(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_string_value(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_image_value(ParsingContext const&, StyleComponentValueRule const&);
static RefPtr<StyleValue> parse_box_shadow_value(ParsingContext const&, Vector<StyleComponentValueRule> const&);
template<typename T>
Optional<SelectorList> parse_a_selector_list(TokenStream<T>&);
template<typename T>
Optional<SelectorList> parse_a_relative_selector_list(TokenStream<T>&);
enum class SelectorParsingResult {
Done,
SyntaxError,
};
RefPtr<Selector> parse_complex_selector(TokenStream<StyleComponentValueRule>&, bool allow_starting_combinator);
Result<Selector::CompoundSelector, SelectorParsingResult> parse_compound_selector(TokenStream<StyleComponentValueRule>&);
Optional<Selector::Combinator> parse_selector_combinator(TokenStream<StyleComponentValueRule>&);
Result<Selector::SimpleSelector, SelectorParsingResult> parse_simple_selector(TokenStream<StyleComponentValueRule>&);
ParsingContext m_context;
Tokenizer m_tokenizer;
Vector<Token> m_tokens;
TokenStream<Token> m_token_stream;
};
}
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