Struct AttributeEntry 

pub struct AttributeEntry {
    pub name: Cow<'static, str>,
    /* private fields */
}

Represents a single attribute on a virtual DOM node.

Combines an attribute name with its corresponding value.

OPT 2: attribute names are Cow<'static, str>. The html! macro emits Cow::Borrowed("class") for the common literal case so attribute keys share a single static slice across the whole rendered DOM, removing the per-attribute String heap allocation. The AttributeValue::Text(String) payload keeps its owned allocation (text values are user-supplied strings that almost always come from string interpolation or runtime formatting).

Fields

name: Cow<'static, str>

The name of the attribute.

get_name is public: ui/tests/view_factories collects attribute names from outside this crate. get_mut / set stay crate-internal — an attribute entry is built once by New and never rewritten.

Implementations

impl AttributeEntry

Implementation of the public read side of an attribute entry.

pub fn class_names(&self) -> Vec<String>

Returns the CSS class names this attribute carries.

The class attribute is the one place where a component’s styling decisions become observable, so it needs a public read side: a component library’s tests have to be able to assert that a state actually landed on the right class, and an external crate cannot read the raw attribute value.

Every shape the attribute can take is reported: Css and CssRef contribute the class name they carry, Text and StaticText contribute their string split on whitespace, a Signal contributes the class list it currently holds — that is the shape a reactive class: attribute takes — and the remaining shapes, an event handler, contribute nothing, because neither is a class list.

Returns

• Vec<String> - The class names, in the order they appear.

pub fn text_value(&self) -> Option<String>

Returns the attribute’s value as text, when it carries one.

A Text or StaticText attribute is its own value; a Css or CssRef attribute contributes its class name, because that is the text the browser ends up showing for it. The remaining shapes — a reactive signal, an event handler — carry no text.

Returns

• Option<String> - The value, when the attribute has one.

impl AttributeEntry

pub fn get_name(&self) -> &Cow<'static, str>

impl AttributeEntry

pub fn new(name: Cow<'static, str>, value: AttributeValue) -> Self

Trait Implementations

impl Clone for AttributeEntry

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AttributeEntry

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

Formats the struct fields as a debug struct, skipping excluded fields.

Arguments

• &mut std::fmt::Formatter<'_> - The formatter to write the representation into.

Returns

• std::fmt::Result - Success or failure of the formatting operation.

impl PartialEq for AttributeEntry

Visual equality comparison for attribute entries.

Two attribute entries are equal when their names match and their values are visually equal as defined by AttributeValue::eq.

fn eq(&self, other: &Self) -> bool

Compares two attribute entries for visual equality.

Arguments

• &Self - The first attribute entry.
• &Self - The second attribute entry.

Returns

• bool - true if both names and values match.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.