feat(desktop): custom font settings for terminal and editor

apps/desktop/src/lib/trpc/routers/settings/font-settings.test.ts

@@ -0,0 +1,167 @@
+import { describe, expect, it } from "bun:test";
+import {
+	setFontSettingsSchema,
+	transformFontSettings,
+} from "./font-settings.utils";
+
+describe("font settings validation", () => {
+	describe("font size validation (range 10-24)", () => {
+		it("accepts font size at minimum (10)", () => {
+			const result = setFontSettingsSchema.safeParse({
+				terminalFontSize: 10,
+			});
+			expect(result.success).toBe(true);
+		});
+
+		it("accepts font size at maximum (24)", () => {
+			const result = setFontSettingsSchema.safeParse({
+				editorFontSize: 24,
+			});
+			expect(result.success).toBe(true);
+		});
+
+		it("accepts font size in the middle of range", () => {
+			const result = setFontSettingsSchema.safeParse({
+				terminalFontSize: 14,
+				editorFontSize: 16,
+			});
+			expect(result.success).toBe(true);
+		});
+
+		it("rejects font size below minimum (< 10)", () => {
+			const result = setFontSettingsSchema.safeParse({
+				terminalFontSize: 9,
+			});
+			expect(result.success).toBe(false);
+		});
+
+		it("rejects font size of 0", () => {
+			const result = setFontSettingsSchema.safeParse({
+				editorFontSize: 0,
+			});
+			expect(result.success).toBe(false);
+		});
+
+		it("rejects font size above maximum (> 24)", () => {
+			const result = setFontSettingsSchema.safeParse({
+				terminalFontSize: 25,
+			});
+			expect(result.success).toBe(false);
+		});
+
+		it("rejects very large font size", () => {
+			const result = setFontSettingsSchema.safeParse({
+				editorFontSize: 100,
+			});
+			expect(result.success).toBe(false);
+		});
+
+		it("rejects non-integer font sizes", () => {
+			const result = setFontSettingsSchema.safeParse({
+				terminalFontSize: 14.5,
+			});
+			expect(result.success).toBe(false);
+		});
+
+		it("accepts null font size (reset)", () => {
+			const result = setFontSettingsSchema.safeParse({
+				terminalFontSize: null,
+				editorFontSize: null,
+			});
+			expect(result.success).toBe(true);
+		});
+	});
+
+	describe("font family trimming", () => {
+		it("trims whitespace from font family", () => {
+			const input = setFontSettingsSchema.parse({
+				terminalFontFamily: "  JetBrains Mono  ",
+			});
+			const result = transformFontSettings(input);
+			expect(result.terminalFontFamily).toBe("JetBrains Mono");
+		});
+
+		it("trims whitespace from editor font family", () => {
+			const input = setFontSettingsSchema.parse({
+				editorFontFamily: "  Fira Code  ",
+			});
+			const result = transformFontSettings(input);
+			expect(result.editorFontFamily).toBe("Fira Code");
+		});
+
+		it("accepts valid font families without modification", () => {
+			const input = setFontSettingsSchema.parse({
+				terminalFontFamily: "JetBrains Mono",
+				editorFontFamily: "Fira Code",
+			});
+			const result = transformFontSettings(input);
+			expect(result.terminalFontFamily).toBe("JetBrains Mono");
+			expect(result.editorFontFamily).toBe("Fira Code");
+		});
+
+		it("accepts common monospace fonts", () => {
+			const fonts = [
+				"JetBrains Mono",
+				"Fira Code",
+				"Source Code Pro",
+				"Cascadia Code",
+				"IBM Plex Mono",
+				"Hack",
+				"Inconsolata",
+			];
+
+			for (const font of fonts) {
+				const input = setFontSettingsSchema.parse({
+					terminalFontFamily: font,
+				});
+				const result = transformFontSettings(input);
+				expect(result.terminalFontFamily).toBe(font);
+			}
+		});
+	});
+
+	describe("empty string as null (reset)", () => {
+		it("treats empty string font family as null", () => {
+			const input = setFontSettingsSchema.parse({
+				terminalFontFamily: "",
+			});
+			const result = transformFontSettings(input);
+			expect(result.terminalFontFamily).toBeNull();
+		});
+
+		it("treats whitespace-only font family as null", () => {
+			const input = setFontSettingsSchema.parse({
+				editorFontFamily: "   ",
+			});
+			const result = transformFontSettings(input);
+			expect(result.editorFontFamily).toBeNull();
+		});
+
+		it("treats null font family as null", () => {
+			const input = setFontSettingsSchema.parse({
+				terminalFontFamily: null,
+			});
+			const result = transformFontSettings(input);
+			expect(result.terminalFontFamily).toBeNull();
+		});
+	});
+
+	describe("partial updates", () => {
+		it("only includes provided fields in the result", () => {
+			const input = setFontSettingsSchema.parse({
+				terminalFontFamily: "Fira Code",
+			});
+			const result = transformFontSettings(input);
+			expect(result.terminalFontFamily).toBe("Fira Code");
+			expect(result).not.toHaveProperty("editorFontFamily");
+			expect(result).not.toHaveProperty("terminalFontSize");
+			expect(result).not.toHaveProperty("editorFontSize");
+		});
+
+		it("accepts empty input (no changes)", () => {
+			const input = setFontSettingsSchema.parse({});
+			const result = transformFontSettings(input);
+			expect(Object.keys(result)).toHaveLength(0);
+		});
+	});
+});

apps/desktop/src/lib/trpc/routers/settings/font-settings.utils.ts

@@ -0,0 +1,31 @@
+import { z } from "zod";
+
+export const setFontSettingsSchema = z.object({
+	terminalFontFamily: z.string().max(500).nullable().optional(),
+	terminalFontSize: z.number().int().min(10).max(24).nullable().optional(),
+	editorFontFamily: z.string().max(500).nullable().optional(),
+	editorFontSize: z.number().int().min(10).max(24).nullable().optional(),
+});
+
+export type SetFontSettingsInput = z.infer<typeof setFontSettingsSchema>;
+
+export function transformFontSettings(
+	input: SetFontSettingsInput,
+): Record<string, string | number | null> {
+	const set: Record<string, string | number | null> = {};
+
+	if (input.terminalFontFamily !== undefined) {
+		set.terminalFontFamily = input.terminalFontFamily?.trim() || null;
+	}
+	if (input.terminalFontSize !== undefined) {
+		set.terminalFontSize = input.terminalFontSize;
+	}
+	if (input.editorFontFamily !== undefined) {
+		set.editorFontFamily = input.editorFontFamily?.trim() || null;
+	}
+	if (input.editorFontSize !== undefined) {
+		set.editorFontSize = input.editorFontSize;
+	}
+
+	return set;
+}

apps/desktop/src/lib/trpc/routers/settings/index.ts

@@ -20,6 +20,10 @@ import { DEFAULT_RINGTONE_ID, RINGTONES } from "shared/ringtones";
 import { z } from "zod";
 import { publicProcedure, router } from "../..";
 import { getGitAuthorName, getGitHubUsername } from "../workspaces/utils/git";
+import {
+	setFontSettingsSchema,
+	transformFontSettings,
+} from "./font-settings.utils";
 
 const VALID_RINGTONE_IDS = RINGTONES.map((r) => r.id);
 
@@ -495,6 +499,37 @@ export const createSettingsRouter = () => {
 				return { success: true };
 			}),
 
+		getFontSettings: publicProcedure.query(() => {
+			const row = getSettings();
+			return {
+				terminalFontFamily: row.terminalFontFamily ?? null,
+				terminalFontSize: row.terminalFontSize ?? null,
+				editorFontFamily: row.editorFontFamily ?? null,
+				editorFontSize: row.editorFontSize ?? null,
+			};
+		}),
+
+		setFontSettings: publicProcedure
+			.input(setFontSettingsSchema)
+			.mutation(({ input }) => {
+				const set = transformFontSettings(input);
+
+				if (Object.keys(set).length === 0) {
+					return { success: true };
+				}
+
+				localDb
+					.insert(settings)
+					.values({ id: 1, ...set })
+					.onConflictDoUpdate({
+						target: settings.id,
+						set,
+					})
+					.run();
+
+				return { success: true };
+			}),
+
 		// TODO: remove telemetry procedures once telemetry_enabled column is dropped
 		getTelemetryEnabled: publicProcedure.query(() => {
 			return true;

apps/desktop/src/renderer/providers/MonacoProvider/MonacoProvider.tsx

@@ -6,7 +6,8 @@ import htmlWorker from "monaco-editor/esm/vs/language/html/html.worker?worker";
 import jsonWorker from "monaco-editor/esm/vs/language/json/json.worker?worker";
 import tsWorker from "monaco-editor/esm/vs/language/typescript/ts.worker?worker";
 import type React from "react";
-import { createContext, useContext, useEffect, useState } from "react";
+import { createContext, useContext, useEffect, useMemo, useState } from "react";
+import { electronTrpc } from "renderer/lib/electron-trpc";
 import { useMonacoTheme } from "renderer/stores/theme";
 
 self.MonacoEnvironment = {
@@ -127,6 +128,31 @@ export const MONACO_EDITOR_OPTIONS = {
 	},
 };
 
+export function useMonacoEditorOptions() {
+	const { data: fontSettings } = electronTrpc.settings.getFontSettings.useQuery(
+		undefined,
+		{
+			staleTime: 30_000,
+		},
+	);
+
+	return useMemo(() => {
+		if (!fontSettings) return MONACO_EDITOR_OPTIONS;
+		const fontSize =
+			fontSettings.editorFontSize ?? MONACO_EDITOR_OPTIONS.fontSize;
+		return {
+			...MONACO_EDITOR_OPTIONS,
+			...(fontSettings.editorFontFamily && {
+				fontFamily: fontSettings.editorFontFamily,
+			}),
+			...(fontSettings.editorFontSize != null && {
+				fontSize,
+				lineHeight: Math.round(fontSize * 1.5),
+			}),
+		};
+	}, [fontSettings]);
+}
+
 export function registerSaveAction(
 	editor: monaco.editor.IStandaloneCodeEditor,
 	onSave: () => void,

apps/desktop/src/renderer/providers/MonacoProvider/index.ts

@@ -4,5 +4,6 @@ export {
 	monaco,
 	registerSaveAction,
 	SUPERSET_THEME,
+	useMonacoEditorOptions,
 	useMonacoReady,
 } from "./MonacoProvider";