Marshall Bowers
659f34bf21
This PR adds settings controls for changing the UI and buffer font families. Release Notes: - N/A
53 lines
1.4 KiB
Rust
53 lines
1.4 KiB
Rust
use std::sync::Arc;
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use std::time::Instant;
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use gpui::{AppContext, Global, ReadGlobal, SharedString};
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use parking_lot::RwLock;
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#[derive(Default)]
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struct FontFamilyCacheState {
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loaded_at: Option<Instant>,
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font_families: Vec<SharedString>,
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}
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/// A cache for the list of font families.
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///
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/// Listing the available font families from the text system is expensive,
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/// so we do it once and then use the cached values each render.
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#[derive(Default)]
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pub struct FontFamilyCache {
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state: RwLock<FontFamilyCacheState>,
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}
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#[derive(Default)]
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struct GlobalFontFamilyCache(Arc<FontFamilyCache>);
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impl Global for GlobalFontFamilyCache {}
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impl FontFamilyCache {
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pub fn init_global(cx: &mut AppContext) {
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cx.default_global::<GlobalFontFamilyCache>();
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}
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pub fn global(cx: &AppContext) -> Arc<Self> {
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GlobalFontFamilyCache::global(cx).0.clone()
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}
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pub fn list_font_families(&self, cx: &AppContext) -> Vec<SharedString> {
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if self.state.read().loaded_at.is_some() {
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return self.state.read().font_families.clone();
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}
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let mut lock = self.state.write();
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lock.font_families = cx
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.text_system()
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.all_font_names()
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.into_iter()
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.map(SharedString::from)
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.collect();
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lock.loaded_at = Some(Instant::now());
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lock.font_families.clone()
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}
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}
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