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LibWeb: Move some static functions from CSS/Parser.cpp into a new file
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Ali Mohammad Pur
Ali Mohammad Pur
parent
06c6c40df9
commit
d60d149e62
3 changed files with 139 additions and 124 deletions
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@ -8746,6 +8746,59 @@ private:
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ComponentValue m_component_value;
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};
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// https://html.spec.whatwg.org/multipage/images.html#parse-a-srcset-attribute
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Length Parser::Parser::parse_as_sizes_attribute()
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{
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Optional<Length> size;
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// When asked to parse a sizes attribute from an element,
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// parse a comma-separated list of component values from the value of the element's sizes attribute
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// (or the empty string, if the attribute is absent), and let unparsed sizes list be the result.
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auto unparsed_sizes_list = parse_a_comma_separated_list_of_component_values(m_token_stream);
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// For each unparsed size in unparsed sizes list:
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for (auto& unparsed_size : unparsed_sizes_list) {
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// 1. Remove all consecutive <whitespace-token>s from the end of unparsed size.
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// If unparsed size is now empty, that is a parse error; continue.
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while (!unparsed_size.is_empty() && unparsed_size.last().is_token() && unparsed_size.last().token().is(Token::Type::Whitespace))
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unparsed_size.take_last();
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if (unparsed_size.is_empty())
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continue;
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// 2. If the last component value in unparsed size is a valid non-negative <source-size-value>,
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// let size be its value and remove the component value from unparsed size.
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// FIXME: Any CSS function other than the math functions is invalid.
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// Otherwise, there is a parse error; continue.
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auto length = parse_length(unparsed_size.last());
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if (length.has_value() && length.value().raw_value() >= 0) {
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size = length.value();
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unparsed_size.take_last();
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} else {
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continue;
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}
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// 3. Remove all consecutive <whitespace-token>s from the end of unparsed size.
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// If unparsed size is now empty, return size and exit this algorithm.
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// If this was not the last item in unparsed sizes list, that is a parse error.
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while (!unparsed_size.is_empty() && unparsed_size.last().is_token() && unparsed_size.last().token().is(Token::Type::Whitespace))
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unparsed_size.take_last();
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if (unparsed_size.is_empty())
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return size.value();
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// 4. Parse the remaining component values in unparsed size as a <media-condition>.
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// If it does not parse correctly, or it does parse correctly but the <media-condition> evaluates to false, continue.
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TokenStream<ComponentValue> token_stream { unparsed_size };
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auto media_condition = parse_media_condition(token_stream, MediaCondition::AllowOr::Yes);
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if (media_condition && media_condition->evaluate(*m_context.window()) == MatchResult::True) {
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return size.value();
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} else {
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continue;
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}
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}
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return Length(100, Length::Type::Vw);
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}
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// https://www.w3.org/TR/css-values-4/#parse-a-calculation
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ErrorOr<OwnPtr<CalculationNode>> Parser::parse_a_calculation(Vector<ComponentValue> const& original_values)
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{
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@ -9127,127 +9180,3 @@ TimePercentage Parser::Dimension::time_percentage() const
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VERIFY_NOT_REACHED();
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}
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}
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namespace Web {
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CSS::CSSStyleSheet* parse_css_stylesheet(CSS::Parser::ParsingContext const& context, StringView css, Optional<AK::URL> location)
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{
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if (css.is_empty()) {
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auto rule_list = CSS::CSSRuleList::create_empty(context.realm()).release_value_but_fixme_should_propagate_errors();
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auto media_list = CSS::MediaList::create(context.realm(), {}).release_value_but_fixme_should_propagate_errors();
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return CSS::CSSStyleSheet::create(context.realm(), rule_list, media_list, location).release_value_but_fixme_should_propagate_errors();
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}
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auto parser = CSS::Parser::Parser::create(context, css).release_value_but_fixme_should_propagate_errors();
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return parser.parse_as_css_stylesheet(location);
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}
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CSS::ElementInlineCSSStyleDeclaration* parse_css_style_attribute(CSS::Parser::ParsingContext const& context, StringView css, DOM::Element& element)
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{
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if (css.is_empty())
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return CSS::ElementInlineCSSStyleDeclaration::create(element, {}, {}).release_value_but_fixme_should_propagate_errors();
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auto parser = CSS::Parser::Parser::create(context, css).release_value_but_fixme_should_propagate_errors();
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return parser.parse_as_style_attribute(element);
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}
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ErrorOr<RefPtr<CSS::StyleValue>> parse_css_value(CSS::Parser::ParsingContext const& context, StringView string, CSS::PropertyID property_id)
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{
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if (string.is_empty())
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return nullptr;
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auto parser = TRY(CSS::Parser::Parser::create(context, string));
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return parser.parse_as_css_value(property_id);
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}
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CSS::CSSRule* parse_css_rule(CSS::Parser::ParsingContext const& context, StringView css_text)
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{
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auto parser = CSS::Parser::Parser::create(context, css_text).release_value_but_fixme_should_propagate_errors();
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return parser.parse_as_css_rule();
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}
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Optional<CSS::SelectorList> parse_selector(CSS::Parser::ParsingContext const& context, StringView selector_text)
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{
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auto parser = CSS::Parser::Parser::create(context, selector_text).release_value_but_fixme_should_propagate_errors();
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return parser.parse_as_selector();
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}
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RefPtr<CSS::MediaQuery> parse_media_query(CSS::Parser::ParsingContext const& context, StringView string)
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{
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auto parser = CSS::Parser::Parser::create(context, string).release_value_but_fixme_should_propagate_errors();
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return parser.parse_as_media_query();
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}
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Vector<NonnullRefPtr<CSS::MediaQuery>> parse_media_query_list(CSS::Parser::ParsingContext const& context, StringView string)
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{
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auto parser = CSS::Parser::Parser::create(context, string).release_value_but_fixme_should_propagate_errors();
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return parser.parse_as_media_query_list();
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}
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RefPtr<CSS::Supports> parse_css_supports(CSS::Parser::ParsingContext const& context, StringView string)
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{
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if (string.is_empty())
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return {};
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auto parser = CSS::Parser::Parser::create(context, string).release_value_but_fixme_should_propagate_errors();
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return parser.parse_as_supports();
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}
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Optional<CSS::StyleProperty> parse_css_supports_condition(CSS::Parser::ParsingContext const& context, StringView string)
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{
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if (string.is_empty())
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return {};
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auto parser = CSS::Parser::Parser::create(context, string).release_value_but_fixme_should_propagate_errors();
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return parser.parse_as_supports_condition();
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}
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// https://html.spec.whatwg.org/multipage/images.html#parse-a-srcset-attribute
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CSS::Length CSS::Parser::Parser::parse_as_sizes_attribute()
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{
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Optional<CSS::Length> size;
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// When asked to parse a sizes attribute from an element,
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// parse a comma-separated list of component values from the value of the element's sizes attribute
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// (or the empty string, if the attribute is absent), and let unparsed sizes list be the result.
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auto unparsed_sizes_list = parse_a_comma_separated_list_of_component_values(m_token_stream);
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// For each unparsed size in unparsed sizes list:
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for (auto& unparsed_size : unparsed_sizes_list) {
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// 1. Remove all consecutive <whitespace-token>s from the end of unparsed size.
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// If unparsed size is now empty, that is a parse error; continue.
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while (!unparsed_size.is_empty() && unparsed_size.last().is_token() && unparsed_size.last().token().is(Token::Type::Whitespace))
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unparsed_size.take_last();
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if (unparsed_size.is_empty())
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continue;
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// 2. If the last component value in unparsed size is a valid non-negative <source-size-value>,
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// let size be its value and remove the component value from unparsed size.
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// FIXME: Any CSS function other than the math functions is invalid.
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// Otherwise, there is a parse error; continue.
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auto length = parse_length(unparsed_size.last());
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if (length.has_value() && length.value().raw_value() >= 0) {
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size = length.value();
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unparsed_size.take_last();
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} else {
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continue;
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}
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// 3. Remove all consecutive <whitespace-token>s from the end of unparsed size.
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// If unparsed size is now empty, return size and exit this algorithm.
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// If this was not the last item in unparsed sizes list, that is a parse error.
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while (!unparsed_size.is_empty() && unparsed_size.last().is_token() && unparsed_size.last().token().is(Token::Type::Whitespace))
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unparsed_size.take_last();
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if (unparsed_size.is_empty())
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return size.value();
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// 4. Parse the remaining component values in unparsed size as a <media-condition>.
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// If it does not parse correctly, or it does parse correctly but the <media-condition> evaluates to false, continue.
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TokenStream<ComponentValue> token_stream { unparsed_size };
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auto media_condition = parse_media_condition(token_stream, MediaCondition::AllowOr::Yes);
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if (media_condition && media_condition->evaluate(*m_context.window()) == CSS::MatchResult::True) {
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return size.value();
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} else {
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continue;
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}
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}
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return CSS::Length(100, CSS::Length::Type::Vw);
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}
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}
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