fix(desktop): leave full screen before hiding on macOS close (#3284)

fluxer_desktop/src/main/MacFullScreenHide.ts

@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+export interface FullScreenHideableWindow {
+	isDestroyed(): boolean;
+	isFullScreen(): boolean;
+	setFullScreen(flag: boolean): void;
+	hide(): void;
+	once(event: 'leave-full-screen', listener: () => void): unknown;
+	removeListener(event: 'leave-full-screen', listener: () => void): unknown;
+}
+
+const pendingHides = new WeakMap<FullScreenHideableWindow, () => void>();
+
+export function hideWindowLeavingFullScreen(
+	window: FullScreenHideableWindow,
+	platform: NodeJS.Platform = process.platform,
+): void {
+	if (platform !== 'darwin' || !window.isFullScreen()) {
+		window.hide();
+		return;
+	}
+	if (pendingHides.has(window)) return;
+	const hide = () => {
+		pendingHides.delete(window);
+		if (!window.isDestroyed()) window.hide();
+	};
+	pendingHides.set(window, hide);
+	window.once('leave-full-screen', hide);
+	window.setFullScreen(false);
+}
+
+export function cancelPendingFullScreenHide(window: FullScreenHideableWindow): void {
+	const hide = pendingHides.get(window);
+	if (!hide) return;
+	pendingHides.delete(window);
+	window.removeListener('leave-full-screen', hide);
+}