Struct RuleSet 

pub struct RuleSet { /* private fields */ }

Indexed collection of resolved CSS declarations partitioned by selector subject.

Instead of matching every declaration against every DOM element O(N_DOM * M_CSS), declarations are grouped by selector and indexed by their subject selector (rightmost part):

• ID selector (#id)
• Class selectors (.class)
• Tag name selector (div, p, etc.)
• Attribute selectors ([hidden])
• Universal / pseudo-class-only selectors

Declarations produced by one rule block share an identical selector, so grouped matching evaluates each selector at most once per element instead of once per declaration.

Implementations

impl RuleSet

pub fn from_declarations( declarations: &[ResolvedDeclaration], media_env: &MediaEnvironment, ) -> Self

Builds a RuleSet holding a copy of a list of ResolvedDeclarations, pre-filtering by MediaEnvironment.

pub fn query_candidates( &self, element: &ElementInfo, ) -> impl Iterator<Item = &SelectorGroup>

Returns an iterator over selector candidates that might match the given element, each unique selector at most once per element.

pub fn declarations(&self) -> &[ResolvedDeclaration]

Trait Implementations

impl Clone for RuleSet

fn clone(&self) -> RuleSet

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RuleSet

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for RuleSet

fn default() -> RuleSet

Returns the “default value” for a type.