Struct FallbackChain 

pub struct FallbackChain { /* private fields */ }

An ordered list of font families used for glyph-level fallback.

The resolver walks the chain in order and returns the first family whose Unicode-range heuristic covers ch. The last entry acts as a universal fallback (“tofu” / .notdef).

Implementations

impl FallbackChain

pub fn default_chain() -> Self

Construct the default fallback chain:

1. CJK fonts — covers Unified Ideographs, Kana, Hangul …
2. Emoji font — covers emoji symbol ranges
3. Latin / universal fallback

pub fn add_family(&mut self, family: String)

Append a new family at the end of the chain (before the universal fallback if one is present — this is handled automatically via the chain-walk in Self::resolve_glyph).

pub fn resolve_glyph(&self, ch: char) -> Option<&str>

Return the name of the first family in the chain that can render ch.

Returns None only when the chain is empty (which the default chain never produces).

pub fn families(&self) -> &[FamilyEntry]

Borrow the family list.