Struct ElementInfo 

pub struct ElementInfo {

    pub tag_name: Arc<str>,
    pub id: Option<Arc<str>>,
    pub classes: Arc<[Arc<str>]>,
    pub attributes: Arc<[(Arc<str>, Arc<str>)]>,
    pub element_index: usize,
    pub element_count: usize,
    pub type_index: usize,
    pub type_count: usize,
    pub previous_siblings: ElementChain,
    pub has_parent: bool,
    pub checked: bool,
    pub lang: Option<Arc<str>>,
    pub is_empty: bool,
    pub hovered: bool,
    pub active: bool,
}

A single element’s identity as the selector matcher sees it.

The string-bearing fields are shared through Arc because the same element is described many times per layout build: once when its parent builds the sibling list and again inside the ancestor/sibling ElementChain links. Cheap Clone keeps that repeated description from re-cloning every attribute string on the hot path.

Fields

tag_name: Arc<str>

id: Option<Arc<str>>

classes: Arc<[Arc<str>]>

attributes: Arc<[(Arc<str>, Arc<str>)]>

element_index: usize

One-based index among element siblings.

element_count: usize

Number of element siblings including this element.

type_index: usize

One-based index among siblings with the same tag name.

type_count: usize

Number of siblings with the same tag name.

previous_siblings: ElementChain

Element siblings preceding this element in document order, nearest first. Links are shared through Arc, so building it per sibling is O(1).

has_parent: bool

Whether this element has a parent element.

The tree root is an element with no parent, and structural pseudo-classes such as :first-child must not match it.

checked: bool

Whether a checkbox or radio is currently checked. This is live checkedness, not the checked content attribute, which is defaultChecked and does not affect :checked.

lang: Option<Arc<str>>

The language tag in effect for this element: its own lang attribute, or failing that the nearest ancestor’s. :lang() matches against this.

is_empty: bool

Whether this element is :empty under the Selectors 4 definition: no element children, and no text node with non-empty data. Comments and processing instructions do not count.

hovered: bool

Whether this element or an ancestor is under the pointer.

active: bool

Whether this element or an ancestor is the active (pressed) target.

Trait Implementations

impl Clone for ElementInfo

fn clone(&self) -> ElementInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ElementInfo

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

Formats the value using the given formatter.

impl Default for ElementInfo

fn default() -> ElementInfo

Returns the “default value” for a type.