Type Alias FallbackSelectionFn

pub type FallbackSelectionFn<'a> = Box<dyn Fn(char, &[ID], &mut Arc<Database>) -> Option<ID> + Send + Sync + 'a>;

A shorthand for FontResolver’s fallback selection function.

This function receives a specific character, a list of already used fonts, and a font database. It should return the ID of a font that

• is not any of the already used fonts
• is as close as possible to the first already used font (if any)
• supports the given character

The function can search the existing database, but can also load additional fonts dynamically. See the documentation of FontSelectionFn for more details.

Aliased Type

struct FallbackSelectionFn<'a>(/* private fields */);