Address HUD protection review feedback

src/components/launch/LaunchWindow.tsx

@@ -19,6 +19,7 @@ import { useScopedT } from "../../contexts/I18nContext";
 import { useMicrophoneDevices } from "../../hooks/useMicrophoneDevices";
 import { useScreenRecorder } from "../../hooks/useScreenRecorder";
 import { useVideoDevices } from "../../hooks/useVideoDevices";
+import { supportsHudCaptureProtection } from "../../lib/hudCaptureProtection";
 import { Button } from "../ui/button";
 import { HudInteractionContext } from "./contexts/HudInteractionContext";
 import { canToggleFloatingWebcamPreview } from "./floatingWebcamPreview";
@@ -115,7 +116,7 @@ function LaunchWindowContent() {
 		toggleHudCaptureProtection,
 	} = useLaunchWindowSystemState(preparePermissions);
 
-	const supportsHudCaptureProtection = true;
+	const hudCaptureProtectionSupported = supportsHudCaptureProtection(platform ?? "");
 
 	useEffect(() => {
 		if (!selectedDeviceId) {
@@ -372,7 +373,7 @@ function LaunchWindowContent() {
 			</div>
 
 			<MorePopover
-				supportsHudCaptureProtection={supportsHudCaptureProtection}
+				supportsHudCaptureProtection={hudCaptureProtectionSupported}
 				hideHudFromCapture={hideHudFromCapture}
 				onToggleHudCaptureProtection={() => {
 					void toggleHudCaptureProtection();

src/lib/hudCaptureProtection.test.ts

@@ -0,0 +1,33 @@
+import { describe, expect, it } from "vitest";
+
+import {
+	getHudCaptureExcludedProcessIds,
+	supportsHudCaptureProtection,
+} from "./hudCaptureProtection";
+
+describe("supportsHudCaptureProtection", () => {
+	it.each([
+		["win32", true],
+		["darwin", true],
+		["linux", false],
+		["freebsd", false],
+	])("reports support for %s as %s", (platform, expected) => {
+		expect(supportsHudCaptureProtection(platform)).toBe(expected);
+	});
+});
+
+describe("getHudCaptureExcludedProcessIds", () => {
+	it("passes the current process to macOS capture when protection is enabled", () => {
+		expect(getHudCaptureExcludedProcessIds("darwin", true, 4512)).toEqual([4512]);
+	});
+
+	it.each([
+		["darwin", false, 4512],
+		["win32", true, 4512],
+		["linux", true, 4512],
+		["darwin", true, 0],
+		["darwin", true, Number.NaN],
+	])("returns no native exclusions for %s, enabled=%s, pid=%s", (platform, enabled, pid) => {
+		expect(getHudCaptureExcludedProcessIds(platform, enabled, pid as number)).toEqual([]);
+	});
+});

src/lib/hudCaptureProtection.ts

@@ -0,0 +1,15 @@
+export function supportsHudCaptureProtection(platform: string): boolean {
+	return platform === "darwin" || platform === "win32";
+}
+
+export function getHudCaptureExcludedProcessIds(
+	platform: string,
+	enabled: boolean,
+	processId: number,
+): number[] {
+	if (platform !== "darwin" || !enabled || !Number.isSafeInteger(processId) || processId <= 0) {
+		return [];
+	}
+
+	return [processId];
+}