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LibWeb: Make SelectorEngine::matches_namespace() a standalone function

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This will allow me to reuse it in the next commit.
This commit is contained in:
Andreas Kling 2024-03-19 10:34:32 +01:00
parent a6c23d3db5
commit 432536f0b3
Notes: sideshowbarker 2024-07-17 02:06:40 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/432536f0b3
Pull-request: https://github.com/SerenityOS/serenity/pull/23637
1 changed files with 33 additions and 26 deletions
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59
Userland/Libraries/LibWeb/CSS/SelectorEngine.cpp
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@ -547,6 +547,38 @@ static inline bool matches_pseudo_class(CSS::Selector::SimpleSelector::PseudoCla
return false;
}
static ALWAYS_INLINE bool matches_namespace(
CSS::Selector::SimpleSelector::QualifiedName const& qualified_name,
DOM::Element const& element,
Optional<CSS::CSSStyleSheet const&> style_sheet_for_rule)
{
switch (qualified_name.namespace_type) {
case CSS::Selector::SimpleSelector::QualifiedName::NamespaceType::Default:
// "if no default namespace has been declared for selectors, this is equivalent to *|E."
if (!style_sheet_for_rule.has_value() || !style_sheet_for_rule->default_namespace_rule())
return true;
// "Otherwise it is equivalent to ns|E where ns is the default namespace."
return element.namespace_uri() == style_sheet_for_rule->default_namespace_rule()->namespace_uri();
case CSS::Selector::SimpleSelector::QualifiedName::NamespaceType::None:
// "elements with name E without a namespace"
return !element.namespace_uri().has_value();
case CSS::Selector::SimpleSelector::QualifiedName::NamespaceType::Any:
// "elements with name E in any namespace, including those without a namespace"
return true;
case CSS::Selector::SimpleSelector::QualifiedName::NamespaceType::Named:
// "elements with name E in namespace ns"
// Unrecognized namespace prefixes are invalid, so don't match.
// (We can't detect this at parse time, since a namespace rule may be inserted later.)
// So, if we don't have a context to look up namespaces from, we fail to match.
if (!style_sheet_for_rule.has_value())
return false;
auto selector_namespace = style_sheet_for_rule->namespace_uri(qualified_name.namespace_);
return selector_namespace.has_value() && selector_namespace.value() == element.namespace_uri();
}
VERIFY_NOT_REACHED();
}
static inline bool matches(CSS::Selector::SimpleSelector const& component, Optional<CSS::CSSStyleSheet const&> style_sheet_for_rule, DOM::Element const& element, JS::GCPtr<DOM::ParentNode const> scope)
{
switch (component.type) {
@ -565,32 +597,7 @@ static inline bool matches(CSS::Selector::SimpleSelector const& component, Optio
}
}
// Match the namespace
switch (qualified_name.namespace_type) {
case CSS::Selector::SimpleSelector::QualifiedName::NamespaceType::Default:
// "if no default namespace has been declared for selectors, this is equivalent to *|E."
if (!style_sheet_for_rule.has_value() || !style_sheet_for_rule->default_namespace_rule())
return true;
// "Otherwise it is equivalent to ns|E where ns is the default namespace."
return element.namespace_uri() == style_sheet_for_rule->default_namespace_rule()->namespace_uri();
case CSS::Selector::SimpleSelector::QualifiedName::NamespaceType::None:
// "elements with name E without a namespace"
return !element.namespace_uri().has_value();
case CSS::Selector::SimpleSelector::QualifiedName::NamespaceType::Any:
// "elements with name E in any namespace, including those without a namespace"
return true;
case CSS::Selector::SimpleSelector::QualifiedName::NamespaceType::Named:
// "elements with name E in namespace ns"
// Unrecognized namespace prefixes are invalid, so don't match.
// (We can't detect this at parse time, since a namespace rule may be inserted later.)
// So, if we don't have a context to look up namespaces from, we fail to match.
if (!style_sheet_for_rule.has_value())
return false;
auto selector_namespace = style_sheet_for_rule->namespace_uri(qualified_name.namespace_);
return selector_namespace.has_value() && selector_namespace.value() == element.namespace_uri();
}
VERIFY_NOT_REACHED();
return matches_namespace(qualified_name, element, style_sheet_for_rule);
}
case CSS::Selector::SimpleSelector::Type::Id:
return component.name() == element.id();