Struct SlotStore

pub struct SlotStore { /* private fields */ }

Lookup table indexed by slot id.

The store is immutable from a consumer’s standpoint: themes are built once at load time and handed to the renderer. All accessors return references bound to the store’s lifetime.

Implementations

impl SlotStore

pub fn new() -> Self

Build an empty store. Used by tests and by the JSON loader.

pub fn insert(&mut self, id: impl Into<String>, slot: Slot) -> Option<Slot>

Insert a slot under id. Returns the previous slot under that id if there was one. Used by the JSON loader; not typically called from widget code.

pub fn get(&self, id: &str) -> Option<&Slot>

The raw entry, if present.

pub fn len(&self) -> usize

Number of slots in the store.

pub fn is_empty(&self) -> bool

Whether the store is empty.

pub fn color(&self, id: &str) -> Option<Color>

Resolve id to a Color. Only Slot::Color matches — gradients do not promote down to a single colour.

pub fn paint(&self, id: &str) -> Option<Paint>

Resolve id to a Paint. A colour slot promotes to Paint::Solid; a paint slot returns directly.

pub fn shadows(&self, id: &str) -> Option<&[Shadow]>

Resolve id to an outer-shadow stack. Only Slot::Shadows matches.

pub fn surface(&self, id: &str) -> Option<Surface>

Resolve id to a Surface. A colour slot promotes to a surface with a solid fill and no decorations; a paint slot promotes to a surface with that paint as fill and no decorations; a surface slot returns directly.

pub fn text_style(&self, id: &str) -> Option<&TextStyle>

Resolve id to a TextStyle. Only Slot::TextStyle matches — typography does not promote from anything else.

Trait Implementations

impl Clone for SlotStore

fn clone(&self) -> SlotStore

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SlotStore

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

Formats the value using the given formatter.

impl Default for SlotStore

fn default() -> SlotStore

Returns the “default value” for a type.