Struct BytesFontProvider 

pub struct BytesFontProvider { /* private fields */ }

In-memory font registry. Register bundled and project fonts up front; this implementation never scans the system.

Two BTreeMaps are maintained:

• by_key: (family_lower, weight, style) -> FontData for resolve.
• by_id: id -> FontData for by_id.

Implementations

impl BytesFontProvider

pub fn new() -> Self

Create an empty registry.

pub fn register( &mut self, family: &str, weight: u16, style: FontStyle, bytes: Arc<[u8]>, index: u32, source: FontSource, ) -> String

Register a font face and return its stable id.

The id is computed as "{family_kebab_lower}-{weight}-{style_lower}", e.g. "noto-sans-400-normal". If the same face is registered more than once, the most recent registration wins and reuses the original id. Because kebab-casing can collapse distinct families (e.g. "My Font" and "my-font") onto the same base id, a numeric suffix is appended when the base id is already taken by a different face, so every registered face keeps a unique id. Returns the assigned stable id as a convenience; callers may register purely for the side effect.

source records the provenance of the face (FontSource); it is carried on the resolved FontData so the compile stage can emit a font.local advisory when a face resolves from the local system.

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

Return the lowercase family names of all registered faces (deduplicated, sorted).

Trait Implementations

impl Debug for BytesFontProvider

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

Formats the value using the given formatter.

impl Default for BytesFontProvider

fn default() -> Self

Returns the “default value” for a type.

impl FontProvider for BytesFontProvider

fn resolve( &self, families: &[String], weight: u16, style: FontStyle, ) -> Option<FontData>

Resolve by a priority-ordered family list, weight, and style.

fn by_id(&self, id: &str) -> Option<FontData>

Resolve by the stable id recorded on a shaped run.

fn all_faces(&self) -> Vec<FontData>

All registered faces, in a deterministic order (for building an SVG fontdb, etc.).