Enum Fill 

#[non_exhaustive]
pub enum Fill {
    Page,
    Raised,
    Overlay,
    Well,
    Sunken,
}

A surface intent a region is filled with.

#[non_exhaustive], so a renderer must carry a wildcard arm and a new member is additive rather than breaking. The vocabulary exists to grow and the renderers exist to disagree about how much of it they answer, so growth must not be a lockstep event. The renderer’s wildcard is not a hole: Fill is resolved through a fallible lookup, and a missing intent is answered with structure rather than with a substituted colour.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Page

The page behind everything.

Raised

A surface lifted off the page: cards, controls, menus, toasts.

Overlay

A surface floating above the page rather than resting on it.

Well

The inside of a well.

Sunken

A surface set back from the one it sits on, by colour and nothing else.

Not a well. A well is a hole with an edge, and the two are authored in opposite directions: makeover derives surface-well by inverting against the theme’s own content colour, while surface-sunken is authored and free to sit darker than raised (goingson’s does). Naming only the well left the recessed-with-no-edge surface unsayable, which is what an unchosen tab is: it recedes so the chosen one can come forward, and it carries no bevel of its own.

Trait Implementations

impl Clone for Fill

fn clone(&self) -> Fill

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Fill

impl Debug for Fill

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

Formats the value using the given formatter.

impl Eq for Fill

impl Hash for Fill

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Intent for Fill

fn token(self) -> &'static str

The makeover intent token this resolves against.

impl PartialEq for Fill

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Fill