use alloc::{
string::{String, ToString},
sync::Arc,
vec::Vec,
};
use crate::{Attrs, Font, FontMatches};
pub struct FontSystem{
locale: String,
db: fontdb::Database,
}
impl FontSystem {
pub fn new() -> Self {
let locale = sys_locale::get_locale().unwrap_or_else(|| {
log::warn!("failed to get system locale, falling back to en-US");
String::from("en-US")
});
log::info!("Locale: {}", locale);
let mut db = fontdb::Database::new();
{
let now = std::time::Instant::now();
db.load_fonts_dir("/ui/fonts");
db.set_monospace_family("Fira Mono");
db.set_sans_serif_family("Fira Sans");
db.set_serif_family("DejaVu Serif");
log::info!(
"Parsed {} font faces in {}ms.",
db.len(),
now.elapsed().as_millis()
);
}
{
let now = std::time::Instant::now();
for i in 0..db.faces().len() {
let id = db.faces()[i].id;
unsafe { db.make_shared_face_data(id); }
}
log::info!(
"Mapped {} font faces in {}ms.",
db.len(),
now.elapsed().as_millis()
);
}
Self {
locale,
db,
}
}
pub fn locale(&self) -> &str {
&self.locale
}
pub fn db(&self) -> &fontdb::Database {
&self.db
}
#[allow(clippy::needless_lifetimes)]
pub fn get_font<'a>(&'a self, id: fontdb::ID) -> Option<Arc<Font<'a>>> {
let face = self.db.face(id)?;
match Font::new(face) {
Some(font) => Some(Arc::new(font)),
None => {
log::warn!("failed to load font '{}'", face.post_script_name);
None
}
}
}
pub fn get_font_matches<'a>(&'a self, attrs: Attrs) -> Arc<FontMatches<'a>> {
let mut fonts = Vec::new();
for face in self.db.faces() {
if !attrs.matches(face) {
continue;
}
if let Some(font) = self.get_font(face.id) {
fonts.push(font);
}
}
Arc::new(FontMatches {
locale: &self.locale,
default_family: self.db.family_name(&attrs.family).to_string(),
fonts
})
}
}