Scale text by font size ratio when applying system theme

2026-10-21 14:08:35 +07:00
parent 6122474f9e
commit 36e5a18982
2 changed files with 17 additions and 1 deletions
@@ -147,6 +147,15 @@ match native_theme_gpui::SystemTheme::from_system() {
 configs, so the subsequent `Theme::change` / `sync_system_appearance` for the
 user's `AppearanceMode` picks the right native palette.

+Sizing note: gpui-component derives the window rem from `theme.font_size`, so
+every rem-relative element scales with it. The OS-reported UI font (13 on
+macOS) is smaller than the 16 this app is designed around, so the native path
+multiplies `system.accessibility.text_scaling_factor` by
+`settings.theme.font_size / native_size` before applying — the connector's
+supported scaling knob, which also preserves any OS accessibility scaling.
+The same factor scales `mono_font_size`, so code text follows the UI size
+(the pre-migration app used 13 for mono while the UI was 16).
+
 On the native path, do **not** set `radius` / `font_size` / `light_theme` /
 `dark_theme` etc. on `Theme::global_mut` — the connector owns those fields,
 and overwriting them fights its observer.