Trait SelectorVisitor

pub trait SelectorVisitor: Sized {
    type Impl: SelectorImpl;

    // Provided methods
    fn visit_attribute_selector(
        &mut self,
        _namespace: &NamespaceConstraint<&<Self::Impl as SelectorImpl>::NamespaceUrl>,
        _local_name: &<Self::Impl as SelectorImpl>::LocalName,
        _local_name_lower: &<Self::Impl as SelectorImpl>::LocalName,
    ) -> bool { ... }
    fn visit_simple_selector(&mut self, _: &Component<Self::Impl>) -> bool { ... }
    fn visit_relative_selector_list(
        &mut self,
        _list: &[RelativeSelector<Self::Impl>],
    ) -> bool { ... }
    fn visit_selector_list(
        &mut self,
        _list_kind: SelectorListKind,
        list: &[Selector<Self::Impl>],
    ) -> bool { ... }
    fn visit_complex_selector(
        &mut self,
        _combinator_to_right: Option<Combinator>,
    ) -> bool { ... }
}

A trait to visit selector properties.

All the visit_foo methods return a boolean indicating whether the traversal should continue or not.

Required Associated Types

type Impl: SelectorImpl

The selector implementation this visitor wants to visit.

Provided Methods

fn visit_attribute_selector( &mut self, _namespace: &NamespaceConstraint<&<Self::Impl as SelectorImpl>::NamespaceUrl>, _local_name: &<Self::Impl as SelectorImpl>::LocalName, _local_name_lower: &<Self::Impl as SelectorImpl>::LocalName, ) -> bool

Visit an attribute selector that may match (there are other selectors that may never match, like those containing whitespace or the empty string).

fn visit_simple_selector(&mut self, _: &Component<Self::Impl>) -> bool

Visit a simple selector.

fn visit_relative_selector_list( &mut self, _list: &[RelativeSelector<Self::Impl>], ) -> bool

Visit a nested relative selector list. The caller is responsible to call visit into the internal selectors if / as needed.

The default implementation skips it altogether.

fn visit_selector_list( &mut self, _list_kind: SelectorListKind, list: &[Selector<Self::Impl>], ) -> bool

Visit a nested selector list. The caller is responsible to call visit into the internal selectors if / as needed.

The default implementation does this.

fn visit_complex_selector( &mut self, _combinator_to_right: Option<Combinator>, ) -> bool

Visits a complex selector.

Gets the combinator to the right of the selector, or None if the selector is the rightmost one.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors