Struct GpuiTheme 

pub struct GpuiTheme {

    pub font_family: String,
    pub font_size_pt: u32,
    pub ligatures: bool,
    pub background: u32,
    pub foreground: u32,
    pub status_background: u32,
    pub status_foreground: u32,
    pub cursor_background: u32,
    pub cursor_foreground: u32,
    pub popup_background: u32,
    pub popup_border: u32,
    pub picker_root: u32,
    pub picker_title: u32,
    pub picker_prompt: u32,
    pub picker_count: u32,
    pub popup_title: u32,
    pub popup_hint: u32,
    pub notification_warn: u32,
    pub notification_error: u32,
    pub notification_info: u32,
    pub notification_success: u32,
    pub picker_match_highlight: u32,
    pub picker_marginalia_fg: u32,
    pub indent_guide: u32,
    pub indent_guide_active: u32,
}

GPUI peer’s typed theme cache.

Phase 5.7.B.12: real fields land for the surfaces the binary currently paints (background, foreground, status line, cursor inversion). Stored as Rgba so the render hot path is a direct .bg(self.theme.background) etc. – no per-frame conversion.

The defaults match the Catppuccin Mocha-ish palette the binary’s render used inline pre-5.7.B.12. Future host-side slices will grow host_theme to carry window bg / fg / status / cursor fields; once that lands, GpuiApp::rebuild_gpui_theme reads from there and RendererSignal::ThemeChanged will visibly recolor the window on every :set ui.*. For now the rebuild is a shape-only no-op – the wiring is what this slice unblocks.

Why Rgba and not Hsla: gpui’s rgb(0x...) -> Rgba builder is the natural literal form; .bg(Rgba) / .text_color(Rgba) accept it directly via Into<Background> / Into<Hsla> blanket impls. Sticking with Rgba keeps the theme literal-friendly + the binary’s render free of conversion boilerplate. Color storage discipline: the lib stores u32 packed 0xRRGGBB hex so it builds without the window feature (no transitive gpui link). The binary converts to gpui::Rgba at render time via gpui::rgb(theme.background).

Fields

font_family: String

Font family name for the editor window. Must be a monospace typeface. Configurable via ui.font_family; defaults to “Menlo” (built-in macOS monospace). Updated by rebuild_gpui_theme on every RendererSignal::ThemeChanged.

font_size_pt: u32

Font size in points. Configurable via ui.font_size.

ligatures: bool

Whether OpenType ligatures are enabled. Configurable via ui.ligatures (default true). When false, FontFeatures::disable_ligatures() is applied to every Font before shaping, suppressing calt (drives programming ligatures).

background: u32

Main document background.

foreground: u32

Main document foreground (text + non-cursor chars).

status_background: u32

Status-line background.

status_foreground: u32

Status-line foreground.

cursor_background: u32

Cursor block background (Block shape) + bar / underline border color (Bar / Underline shapes).

cursor_foreground: u32

Cursor block foreground – the character color when the block inverts (Normal/Visual mode cursor cell). Unused by Bar / Underline since the underlying char text stays the document foreground.

popup_background: u32

Popup-overlay background (DisplayBuffer help surface). Slightly darker than the main bg for visual separation.

popup_border: u32

Popup-overlay border / accent color.

picker_root: u32

PP.2b: the root a rooted picker is scoped to, in its prompt. Its own slot rather than popup_border (which it shared with the (n/m) count) so the one piece of context the prompt carries is not the dimmest thing on the line.

picker_title: u32

PP.2c: the picker prompt’s source name, > marker and match count. Own slots rather than the borrowed cursor_background / popup_border they used — borrowing is what left the count and the root indistinguishable, and is the same failure the transient.* set was introduced to end.

picker_prompt: u32

picker_count: u32

popup_title: u32

Popup header TITLE colour (bold accent) — ui.popup.title.

popup_hint: u32

Popup header HINT colour (dim) — ui.popup.hint.

notification_warn: u32

Notification-severity colours, sourced from the diagnostic.{warning,error} theme elements.

The notification overlay referenced diff_change_line_bg / diff_remove_line_bg here — fields that never existed on this struct, so the window-feature build did not compile. Diff line backgrounds were the wrong source anyway: these tint notification text by severity, which is what diagnostic.warning / diagnostic.error already mean, and they recolour with :colorscheme like every other element.

notification_error: u32

notification_info: u32

Info and success rows ↔ diagnostic.info / diff.add.sign, the elements the TUI peer reads for the same levels.

notification_success: u32

picker_match_highlight: u32

Issue #35 (2026-05-22): picker match-range highlight color. Painted on the substring of each candidate that matched the query. Catppuccin Mocha peach by default — distinct from foreground so matches actually pop (previously used cursor_background which equals foreground in the default palette and made matches invisible).

picker_marginalia_fg: u32

Picker marginalia (annotation / kind glyph) color. Mid-grey by default so it doesn’t compete with the candidate text.

indent_guide: u32

IG.4: indentation-guide rule colour, from the indent.guide theme element. Dim by default — a guide bright enough to read directly is one that competes with the code it measures.

indent_guide_active: u32

IG.4: the guide for the block enclosing the cursor, from indent.guide.active. Same hue undimmed; the contrast between the two is what carries the signal.

Trait Implementations

impl Clone for GpuiTheme

fn clone(&self) -> GpuiTheme

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GpuiTheme

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for GpuiTheme

fn default() -> Self

Returns the “default value” for a type.