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LibWeb: Rough implementation of CSS namespace rule

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This provides a rough implementation of the CSS @namespace rule.
Currently we just support default namespaces, namespace prefixes
are still to come.
This commit is contained in:
Jonah 2023-07-29 11:51:15 -05:00 • committed by Sam Atkins
parent 3f7d97f098
commit 60e35f2a97
18 changed files with 266 additions and 3 deletions
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28
Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
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@ -220,19 +220,40 @@ StyleComputer::RuleCache const& StyleComputer::rule_cache_for_cascade_origin(Cas
}
}
Vector<MatchingRule> StyleComputer::filter_namespace_rules(DOM::Element const& element, Vector<MatchingRule> const& rules) const
{
Vector<MatchingRule> filtered_rules;
for (auto const& rule : rules) {
auto namespace_uri = rule.sheet->namespace_filter();
if (namespace_uri.has_value()) {
if (namespace_uri.value() == element.namespace_uri())
filtered_rules.append(rule);
} else {
filtered_rules.append(rule);
}
}
// FIXME: Filter out non-default namespace using prefixes
return filtered_rules;
}
Vector<MatchingRule> StyleComputer::collect_matching_rules(DOM::Element const& element, CascadeOrigin cascade_origin, Optional<CSS::Selector::PseudoElement> pseudo_element) const
{
auto const& rule_cache = rule_cache_for_cascade_origin(cascade_origin);
Vector<MatchingRule> rules_to_run;
auto add_rules_to_run = [&](Vector<MatchingRule> const& rules) {
Vector<MatchingRule> namespace_filtered_rules = filter_namespace_rules(element, rules);
if (pseudo_element.has_value()) {
for (auto& rule : rules) {
for (auto& rule : namespace_filtered_rules) {
if (rule.contains_pseudo_element)
rules_to_run.append(rule);
}
} else {
rules_to_run.extend(rules);
rules_to_run.extend(namespace_filtered_rules);
}
};
@ -2556,10 +2577,11 @@ NonnullOwnPtr<StyleComputer::RuleCache> StyleComputer::make_rule_cache_for_casca
for (CSS::Selector const& selector : rule.selectors()) {
MatchingRule matching_rule {
&rule,
sheet,
style_sheet_index,
rule_index,
selector_index,
selector.specificity(),
selector.specificity()
};
for (auto const& simple_selector : selector.compound_selectors().last().simple_selectors) {