# `Mob.Font`
[🔗](https://github.com/genericjam/mob/blob/master/lib/mob/font.ex#L1)

Font-name utilities backing the theme system's `fonts:` token map — see
`Mob.Theme` for the `fonts:` / `font_fallback:` fields these support.

# `android_resource_name`

```elixir
@spec android_resource_name(String.t()) :: String.t()
```

The Android `res/font/` resource name for a font file: lowercase, the
extension dropped, characters outside `[a-z0-9_]` replaced with `_`
(Android resource-name rules). `"Georgia.ttf"` → `"georgia"`,
`"Inter-Regular.otf"` → `"inter_regular"`. A leading non-letter is
prefixed with `f_` so the name is a valid resource identifier.

This is the single implementation used both at build time (`mob_dev`'s
asset planner, when it copies a font file into `res/font/`) and to
compute the Android half of a `Mob.Theme` font token
(`Mob.Theme.font/2`) — there is deliberately no second copy anywhere
that has to be kept in sync by convention. Living here (in `mob` core,
which ships on-device) rather than in `mob_dev` (dev-only tooling) is
what lets `Mob.Theme.font/2` — app code, compiled into the release —
call it directly.

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*Consult [api-reference.md](api-reference.md) for complete listing*