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/*
* Copyright (c) 2020-2021, the SerenityOS developers.
* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
*
* 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/CSSStyleDeclaration.h>
#include <LibWeb/CSS/GeneralEnclosed.h>
#include <LibWeb/CSS/MediaQuery.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>
#include <LibWeb/CSS/Supports.h>
namespace Web::CSS {
class CSSStyleSheet;
class CSSRule;
class CSSStyleRule;
struct StyleProperty;
enum class PropertyID;
class ParsingContext {
public:
ParsingContext() = default;
explicit ParsingContext(DOM::Document const&);
explicit ParsingContext(DOM::ParentNode&);
bool in_quirks_mode() const;
DOM::Document const* document() const { return m_document; }
AK::URL complete_url(String const&) const;
PropertyID current_property_id() const { return m_current_property_id; }
void set_current_property_id(PropertyID property_id) { m_current_property_id = property_id; }
private:
DOM::Document const* m_document { nullptr };
PropertyID m_current_property_id { PropertyID::Invalid };
};
template<typename T>
class TokenStream {
public:
explicit TokenStream(Vector<T> const&);
~TokenStream();
TokenStream(TokenStream<T> const&) = delete;
bool has_next_token();
T const& next_token();
T const& peek_token(int offset = 0);
T const& current_token();
void reconsume_current_input_token();
int position() const { return m_iterator_offset; }
void rewind_to_position(int);
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 input, String const& encoding = "utf-8");
~Parser();
// The normal parser entry point, for parsing stylesheets.
NonnullRefPtr<CSSStyleSheet> parse_as_stylesheet();
// 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();
// 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();
// Used in @supports conditions. [CSS3-CONDITIONAL]
Optional<StyleProperty> parse_as_declaration();
// For the contents of a style attribute, which parses text into the contents of a single style rule.
RefPtr<PropertyOwningCSSStyleDeclaration> parse_as_list_of_declarations();
// For things that need to consume a single value, like the parsing rules for attr().
Optional<StyleComponentValueRule> parse_as_component_value();
// 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();
Vector<Vector<StyleComponentValueRule>> parse_as_comma_separated_list_of_component_values();
// Contrary to the name, these parse a comma-separated list of selectors, according to the spec.
Optional<SelectorList> parse_as_selector();
Optional<SelectorList> parse_as_relative_selector();
NonnullRefPtrVector<MediaQuery> parse_as_media_query_list();
RefPtr<MediaQuery> parse_as_media_query();
RefPtr<Supports> parse_as_supports();
RefPtr<StyleValue> parse_as_css_value(PropertyID);
static RefPtr<StyleValue> parse_css_value(Badge<StyleComputer>, ParsingContext const&, PropertyID, Vector<StyleComponentValueRule> const&);
private:
enum class ParsingResult {
Done,
IncludesIgnoredVendorPrefix,
SyntaxError,
};
template<typename T>
NonnullRefPtr<CSSStyleSheet> parse_a_stylesheet(TokenStream<T>&);
template<typename T>
NonnullRefPtrVector<CSSRule> parse_a_list_of_rules(TokenStream<T>&);
template<typename T>
RefPtr<CSSRule> parse_a_rule(TokenStream<T>&);
template<typename T>
Optional<StyleProperty> parse_a_declaration(TokenStream<T>&);
template<typename T>
RefPtr<PropertyOwningCSSStyleDeclaration> parse_a_list_of_declarations(TokenStream<T>&);
template<typename T>
Optional<StyleComponentValueRule> parse_a_component_value(TokenStream<T>&);
template<typename T>
Vector<StyleComponentValueRule> parse_a_list_of_component_values(TokenStream<T>&);
template<typename T>
Vector<Vector<StyleComponentValueRule>> parse_a_comma_separated_list_of_component_values(TokenStream<T>&);
template<typename T>
Result<SelectorList, ParsingResult> parse_a_selector(TokenStream<T>&);
template<typename T>
Result<SelectorList, ParsingResult> parse_a_relative_selector(TokenStream<T>&);
template<typename T>
Result<SelectorList, ParsingResult> parse_a_selector_list(TokenStream<T>&);
template<typename T>
Result<SelectorList, ParsingResult> parse_a_relative_selector_list(TokenStream<T>&);
template<typename T>
NonnullRefPtrVector<MediaQuery> parse_a_media_query_list(TokenStream<T>&);
template<typename T>
RefPtr<Supports> parse_a_supports(TokenStream<T>&);
Optional<Selector::SimpleSelector::ANPlusBPattern> parse_a_n_plus_b_pattern(TokenStream<StyleComponentValueRule>&);
template<typename T>
[[nodiscard]] NonnullRefPtrVector<StyleRule> consume_a_list_of_rules(TokenStream<T>&, bool top_level);
template<typename T>
[[nodiscard]] NonnullRefPtr<StyleRule> consume_an_at_rule(TokenStream<T>&);
template<typename T>
[[nodiscard]] RefPtr<StyleRule> consume_a_qualified_rule(TokenStream<T>&);
template<typename T>
[[nodiscard]] Vector<DeclarationOrAtRule> consume_a_list_of_declarations(TokenStream<T>&);
template<typename T>
[[nodiscard]] Optional<StyleDeclarationRule> consume_a_declaration(TokenStream<T>&);
template<typename T>
[[nodiscard]] StyleComponentValueRule consume_a_component_value(TokenStream<T>&);
template<typename T>
[[nodiscard]] NonnullRefPtr<StyleBlockRule> consume_a_simple_block(TokenStream<T>&);
template<typename T>
[[nodiscard]] NonnullRefPtr<StyleFunctionRule> consume_a_function(TokenStream<T>&);
[[nodiscard]] Optional<GeneralEnclosed> parse_general_enclosed(TokenStream<StyleComponentValueRule>&);
[[nodiscard]] RefPtr<CSSRule> convert_to_rule(NonnullRefPtr<StyleRule>);
[[nodiscard]] RefPtr<PropertyOwningCSSStyleDeclaration> convert_to_declaration(NonnullRefPtr<StyleBlockRule>);
[[nodiscard]] Optional<StyleProperty> convert_to_style_property(StyleDeclarationRule const&);
class Dimension {
public:
Dimension(Length&& value)
: m_value(move(value))
{
}
Dimension(Percentage&& value)
: m_value(move(value))
{
}
bool is_length() const;
Length length() const;
bool is_percentage() const;
Percentage percentage() const;
bool is_length_percentage() const;
LengthPercentage length_percentage() const;
private:
Variant<Length, Percentage> m_value;
};
Optional<Dimension> parse_dimension(StyleComponentValueRule const&);
Optional<Color> parse_color(StyleComponentValueRule const&);
Optional<Length> parse_length(StyleComponentValueRule const&);
enum class AllowedDataUrlType {
None,
Image,
};
Optional<AK::URL> parse_url_function(StyleComponentValueRule const&, AllowedDataUrlType = AllowedDataUrlType::None);
Result<NonnullRefPtr<StyleValue>, ParsingResult> parse_css_value(PropertyID, TokenStream<StyleComponentValueRule>&);
RefPtr<StyleValue> parse_css_value(StyleComponentValueRule const&);
RefPtr<StyleValue> parse_builtin_value(StyleComponentValueRule const&);
RefPtr<StyleValue> parse_dynamic_value(StyleComponentValueRule const&);
RefPtr<StyleValue> parse_calculated_value(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_dimension_value(StyleComponentValueRule const&);
RefPtr<StyleValue> parse_numeric_value(StyleComponentValueRule const&);
RefPtr<StyleValue> parse_identifier_value(StyleComponentValueRule const&);
RefPtr<StyleValue> parse_color_value(StyleComponentValueRule const&);
RefPtr<StyleValue> parse_string_value(StyleComponentValueRule const&);
RefPtr<StyleValue> parse_image_value(StyleComponentValueRule const&);
template<typename ParseFunction>
RefPtr<StyleValue> parse_comma_separated_value_list(Vector<StyleComponentValueRule> const&, ParseFunction);
RefPtr<StyleValue> parse_simple_comma_separated_value_list(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_background_value(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_single_background_position_value(TokenStream<StyleComponentValueRule>&);
RefPtr<StyleValue> parse_single_background_repeat_value(TokenStream<StyleComponentValueRule>&);
RefPtr<StyleValue> parse_single_background_size_value(TokenStream<StyleComponentValueRule>&);
RefPtr<StyleValue> parse_border_value(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_border_radius_value(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_border_radius_shorthand_value(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_box_shadow_value(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_single_box_shadow_value(TokenStream<StyleComponentValueRule>&);
RefPtr<StyleValue> parse_flex_value(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_flex_flow_value(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_font_value(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_font_family_value(Vector<StyleComponentValueRule> const&, size_t start_index = 0);
RefPtr<StyleValue> parse_list_style_value(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_overflow_value(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_text_decoration_value(Vector<StyleComponentValueRule> const&);
RefPtr<StyleValue> parse_transform_value(Vector<StyleComponentValueRule> const&);
// calc() parsing, according to https://www.w3.org/TR/css-values-3/#calc-syntax
OwnPtr<CalculatedStyleValue::CalcSum> parse_calc_sum(TokenStream<StyleComponentValueRule>&);
OwnPtr<CalculatedStyleValue::CalcProduct> parse_calc_product(TokenStream<StyleComponentValueRule>&);
Optional<CalculatedStyleValue::CalcValue> parse_calc_value(TokenStream<StyleComponentValueRule>&);
OwnPtr<CalculatedStyleValue::CalcNumberSum> parse_calc_number_sum(TokenStream<StyleComponentValueRule>&);
OwnPtr<CalculatedStyleValue::CalcNumberProduct> parse_calc_number_product(TokenStream<StyleComponentValueRule>&);
Optional<CalculatedStyleValue::CalcNumberValue> parse_calc_number_value(TokenStream<StyleComponentValueRule>&);
OwnPtr<CalculatedStyleValue::CalcProductPartWithOperator> parse_calc_product_part_with_operator(TokenStream<StyleComponentValueRule>&);
OwnPtr<CalculatedStyleValue::CalcSumPartWithOperator> parse_calc_sum_part_with_operator(TokenStream<StyleComponentValueRule>&);
OwnPtr<CalculatedStyleValue::CalcNumberProductPartWithOperator> parse_calc_number_product_part_with_operator(TokenStream<StyleComponentValueRule>& tokens);
OwnPtr<CalculatedStyleValue::CalcNumberSumPartWithOperator> parse_calc_number_sum_part_with_operator(TokenStream<StyleComponentValueRule>&);
OwnPtr<CalculatedStyleValue::CalcSum> parse_calc_expression(Vector<StyleComponentValueRule> const&);
Result<NonnullRefPtr<Selector>, ParsingResult> parse_complex_selector(TokenStream<StyleComponentValueRule>&, bool allow_starting_combinator);
Result<Selector::CompoundSelector, ParsingResult> parse_compound_selector(TokenStream<StyleComponentValueRule>&);
Optional<Selector::Combinator> parse_selector_combinator(TokenStream<StyleComponentValueRule>&);
Result<Selector::SimpleSelector, ParsingResult> parse_simple_selector(TokenStream<StyleComponentValueRule>&);
NonnullRefPtr<MediaQuery> parse_media_query(TokenStream<StyleComponentValueRule>&);
OwnPtr<MediaCondition> parse_media_condition(TokenStream<StyleComponentValueRule>&, MediaCondition::AllowOr allow_or);
Optional<MediaFeature> parse_media_feature(TokenStream<StyleComponentValueRule>&);
Optional<MediaQuery::MediaType> parse_media_type(TokenStream<StyleComponentValueRule>&);
OwnPtr<MediaCondition> parse_media_in_parens(TokenStream<StyleComponentValueRule>&);
Optional<MediaFeatureValue> parse_media_feature_value(TokenStream<StyleComponentValueRule>&);
OwnPtr<Supports::Condition> parse_supports_condition(TokenStream<StyleComponentValueRule>&);
Optional<Supports::InParens> parse_supports_in_parens(TokenStream<StyleComponentValueRule>&);
Optional<Supports::Feature> parse_supports_feature(TokenStream<StyleComponentValueRule>&);
static bool has_ignored_vendor_prefix(StringView);
ParsingContext m_context;
Tokenizer m_tokenizer;
Vector<Token> m_tokens;
TokenStream<Token> m_token_stream;
};
}
namespace Web {
RefPtr<CSS::CSSStyleSheet> parse_css(CSS::ParsingContext const&, StringView);
RefPtr<CSS::PropertyOwningCSSStyleDeclaration> parse_css_declaration(CSS::ParsingContext const&, StringView);
RefPtr<CSS::StyleValue> parse_css_value(CSS::ParsingContext const&, StringView, CSS::PropertyID property_id = CSS::PropertyID::Invalid);
Optional<CSS::SelectorList> parse_selector(CSS::ParsingContext const&, StringView);
RefPtr<CSS::CSSRule> parse_css_rule(CSS::ParsingContext const&, StringView);
RefPtr<CSS::MediaQuery> parse_media_query(CSS::ParsingContext const&, StringView);
NonnullRefPtrVector<CSS::MediaQuery> parse_media_query_list(CSS::ParsingContext const&, StringView);
RefPtr<CSS::Supports> parse_css_supports(CSS::ParsingContext const&, StringView);
RefPtr<CSS::StyleValue> parse_html_length(DOM::Document const&, StringView);
}
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