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Use fallback list via dyn trait in FontSystem

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tigregalis 2025-03-03 16:14:45 +08:00 • committed by Jeremy Soller
parent 4e6d5d731b
commit a67dded054
6 changed files with 142 additions and 20 deletions
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29
src/font/fallback/windows.rs
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@ -2,8 +2,31 @@
use unicode_script::Script;
use super::Fallback;
/// A platform-specific font fallback list, for Windows.
pub struct PlatformFallback;
impl Fallback for PlatformFallback {
fn common_fallback(&self) -> &'static [&'static str] {
common_fallback()
}
fn forbidden_fallback(&self) -> &'static [&'static str] {
forbidden_fallback()
}
fn script_fallback(
&self,
script: unicode_script::Script,
locale: &str,
) -> &'static [&'static str] {
script_fallback(script, locale)
}
}
// Fallbacks to use after any script specific fallbacks
pub fn common_fallback() -> &'static [&'static str] {
fn common_fallback() -> &'static [&'static str] {
//TODO: abstract style (sans/serif/monospaced)
&[
"Segoe UI",
@ -15,7 +38,7 @@ pub fn common_fallback() -> &'static [&'static str] {
}
// Fallbacks to never use
pub fn forbidden_fallback() -> &'static [&'static str] {
fn forbidden_fallback() -> &'static [&'static str] {
&[]
}
@ -36,7 +59,7 @@ fn han_unification(locale: &str) -> &'static [&'static str] {
}
// Fallbacks to use per script
pub fn script_fallback(script: Script, locale: &str) -> &'static [&'static str] {
fn script_fallback(script: Script, locale: &str) -> &'static [&'static str] {
//TODO: better match https://github.com/chromium/chromium/blob/master/third_party/blink/renderer/platform/fonts/win/font_fallback_win.cc#L99
match script {
Script::Adlam => &["Ebrima"],