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LibWeb: Actually instantiate ::before/::after pseudo elements when found

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Regressed in 3e970540b4.

Thanks to Luke for noticing the issue on YouTube! :^)
This commit is contained in:
Andreas Kling 2023-03-14 18:45:24 +01:00
parent e6dc3c291e
commit c598c092c2
2 changed files with 10 additions and 6 deletions
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14
Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
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@ -867,7 +867,7 @@ static ErrorOr<void> cascade_custom_properties(DOM::Element& element, Vector<Mat
}
// https://www.w3.org/TR/css-cascade/#cascading
ErrorOr<void> StyleComputer::compute_cascaded_values(StyleProperties& style, DOM::Element& element, Optional<CSS::Selector::PseudoElement> pseudo_element, bool& did_match_any_pseudo_element_rules) const
ErrorOr<void> StyleComputer::compute_cascaded_values(StyleProperties& style, DOM::Element& element, Optional<CSS::Selector::PseudoElement> pseudo_element, bool& did_match_any_pseudo_element_rules, ComputeStyleMode mode) const
{
// First, we collect all the CSS rules whose selectors match `element`:
MatchingRuleSet matching_rule_set;
@ -876,9 +876,13 @@ ErrorOr<void> StyleComputer::compute_cascaded_values(StyleProperties& style, DOM
matching_rule_set.author_rules = collect_matching_rules(element, CascadeOrigin::Author, pseudo_element);
sort_matching_rules(matching_rule_set.author_rules);
if (pseudo_element.has_value() && matching_rule_set.author_rules.is_empty() && matching_rule_set.user_agent_rules.is_empty()) {
did_match_any_pseudo_element_rules = false;
return {};
if (mode == ComputeStyleMode::CreatePseudoElementStyleIfNeeded) {
VERIFY(pseudo_element.has_value());
if (matching_rule_set.author_rules.is_empty() && matching_rule_set.user_agent_rules.is_empty()) {
did_match_any_pseudo_element_rules = false;
return {};
}
did_match_any_pseudo_element_rules = true;
}
// Then we resolve all the CSS custom properties ("variables") for this element:
@ -1422,7 +1426,7 @@ ErrorOr<RefPtr<StyleProperties>> StyleComputer::compute_style_impl(DOM::Element&
auto style = StyleProperties::create();
// 1. Perform the cascade. This produces the "specified style"
bool did_match_any_pseudo_element_rules = false;
TRY(compute_cascaded_values(style, element, pseudo_element, did_match_any_pseudo_element_rules));
TRY(compute_cascaded_values(style, element, pseudo_element, did_match_any_pseudo_element_rules, mode));
if (mode == ComputeStyleMode::CreatePseudoElementStyleIfNeeded && !did_match_any_pseudo_element_rules)
return nullptr;