Struct ThemeBuilder 

pub struct ThemeBuilder { /* private fields */ }

A layered builder over a Theme baseline — see the module docs for the full precedence order. Every method takes/returns Self by value so calls chain (Theme::builder(base).colors_dark(..).map_shape(..).build()).

Implementations

impl ThemeBuilder

pub fn new(base: Theme) -> Self

Start a builder from base — typically Theme::neutral or a design system’s own baseline, but any already-built Theme works (e.g. re-deriving one theme from another).

pub fn colors_light(self, scheme: ColorScheme) -> Self

Whole-group swap: replace the light ColorScheme outright.

pub fn map_colors_light( self, f: impl FnOnce(ColorScheme) -> ColorScheme, ) -> Self

Per-token closure edit: hand the current light ColorScheme to f, keeping whatever fields it doesn’t overwrite (Rust struct-update .. ergonomics).

pub fn colors_dark(self, scheme: ColorScheme) -> Self

Whole-group swap: replace the dark ColorScheme outright.

pub fn map_colors_dark(self, f: impl FnOnce(ColorScheme) -> ColorScheme) -> Self

Per-token closure edit: hand the current dark ColorScheme to f.

pub fn type_scale(self, scale: TypeScale) -> Self

Whole-group swap: replace the TypeScale outright.

pub fn map_type_scale(self, f: impl FnOnce(TypeScale) -> TypeScale) -> Self

Per-token closure edit: hand the current TypeScale to f.

pub fn shape(self, shape: ShapeScale) -> Self

Whole-group swap: replace the ShapeScale outright.

pub fn map_shape(self, f: impl FnOnce(ShapeScale) -> ShapeScale) -> Self

Per-token closure edit: hand the current ShapeScale to f.

pub fn elevation(self, elevation: Elevation) -> Self

Whole-group swap: replace the Elevation table outright.

pub fn map_elevation(self, f: impl FnOnce(Elevation) -> Elevation) -> Self

Per-token closure edit: hand the current Elevation table to f.

pub fn motion(self, motion: MotionScheme) -> Self

Whole-group swap: replace the MotionScheme outright.

pub fn map_motion(self, f: impl FnOnce(MotionScheme) -> MotionScheme) -> Self

Per-token closure edit: hand the current MotionScheme to f.

pub fn glass(self, glass: GlassScale) -> Self

Whole-group swap: replace the GlassScale outright.

pub fn map_glass(self, f: impl FnOnce(GlassScale) -> GlassScale) -> Self

Per-token closure edit: hand the current GlassScale to f.

pub fn brightness(self, brightness: Brightness) -> Self

Set the active Brightness (which of light/dark Theme::scheme selects).

pub fn design_language(self, design_language: DesignLanguage) -> Self

Set the DesignLanguage tag. Purely a tag (see crate::theme::DesignLanguage’s docs) — this does not itself swap any token group; pair it with the whole-group swaps above when actually changing baselines.

pub fn extension<T: Any + Send + Sync>(self, ext: T) -> Self

Insert or replace a typed extension (see crate::extensions) — replace-by-TypeId, same semantics as ThemeExtensions::insert.

pub fn build(self) -> Theme

Finish building, returning the accumulated Theme. No validation pass in v1 — tokens are data (see module docs).

Trait Implementations

impl Clone for ThemeBuilder

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 ThemeBuilder

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

Formats the value using the given formatter.