Make sure home_page is never in fullscreen

lib/home_page.dart

@@ -1,8 +1,8 @@
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'package:flutter_fullscreen/flutter_fullscreen.dart';
 import 'package:logging/logging.dart';
 import 'package:sheetless/login_page.dart';
+import 'package:sheetless/main.dart';
 import 'package:sheetless/sheet_viewer_page.dart';
 import 'package:sheetless/storage_helper.dart';
 import 'package:package_info_plus/package_info_plus.dart';
@@ -19,7 +19,7 @@ class MyHomePage extends StatefulWidget {
   State<MyHomePage> createState() => _MyHomePageState();
 }
 
-class _MyHomePageState extends State<MyHomePage> with FullScreenListener {
+class _MyHomePageState extends State<MyHomePage> with RouteAware {
   ApiClient? apiClient;
   Future<bool> apiLoggedIn = Future.value(false);
   final StorageHelper _storageHelper = StorageHelper();
@@ -31,10 +31,13 @@ class _MyHomePageState extends State<MyHomePage> with FullScreenListener {
 
   @override
   void initState() {
-    FullScreen.addListener(this);
+    // Deactivate fullscreen by default
+    FullScreen.setFullScreen(false);
 
-    // Load saved fullscreen
-    FullScreen.setFullScreen(widget.config.fullscreen);
+    // So RouteAware gets bound
+    WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
+      routeObserver.subscribe(this, ModalRoute.of(context)!);
+    });
 
     super.initState();
     _loadAppInfo();
@@ -43,10 +46,21 @@ class _MyHomePageState extends State<MyHomePage> with FullScreenListener {
 
   @override
   void dispose() {
-    FullScreen.removeListener(this);
     super.dispose();
   }
 
+  @override
+  void didPush() {
+    FullScreen.setFullScreen(false);
+    super.didPush();
+  }
+
+  @override
+  void didPopNext() {
+    FullScreen.setFullScreen(false);
+    super.didPopNext();
+  }
+
   Future<void> _loadAppInfo() async {
     final info = await PackageInfo.fromPlatform();
     setState(() {
@@ -143,17 +157,6 @@ class _MyHomePageState extends State<MyHomePage> with FullScreenListener {
                       switchShufflingState(!shuffling);
                     },
                   ),
-                  ListTile(
-                    leading: Icon(
-                      widget.config.fullscreen
-                          ? Icons.fullscreen_exit
-                          : Icons.fullscreen,
-                    ),
-                    title: widget.config.fullscreen
-                        ? const Text('Exit Fullscreen')
-                        : const Text('Enter Fullscreen'),
-                    onTap: toggleFullscreen,
-                  ),
                   ListTile(
                     leading: const Icon(Icons.logout),
                     title: const Text('Logout'),
@@ -177,18 +180,6 @@ class _MyHomePageState extends State<MyHomePage> with FullScreenListener {
     );
   }
 
-  @override
-  void onFullScreenChanged(bool enabled, SystemUiMode? systemUiMode) {
-    setState(() {
-      widget.config.fullscreen = enabled;
-      _storageHelper.writeConfig(widget.config);
-    });
-  }
-
-  void toggleFullscreen() {
-    FullScreen.setFullScreen(!widget.config.fullscreen);
-  }
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -205,7 +196,9 @@ class _MyHomePageState extends State<MyHomePage> with FullScreenListener {
                 sheets: snapshot.data!,
                 onSheetOpenRequest: (sheet) {
                   _storageHelper.writeSheetAccessTime(
-                      sheet.uuid, DateTime.now());
+                    sheet.uuid,
+                    DateTime.now(),
+                  );
                   Navigator.push(
                     context,
                     MaterialPageRoute(

lib/main.dart

@@ -10,6 +10,7 @@ import 'package:flutter_fullscreen/flutter_fullscreen.dart';
 
 import 'login_page.dart';
 
+final RouteObserver<ModalRoute> routeObserver = RouteObserver<ModalRoute>();
 Future<void> main() async {
   Logger.root.level = Level.ALL; // defaults to Level.INFO
   Logger.root.onRecord.listen((record) {
@@ -42,6 +43,7 @@ class MyApp extends StatelessWidget {
       title: 'Sheetless',
       theme: ThemeData(useMaterial3: true, primarySwatch: Colors.blue),
       home: const LoginPage(),
+      navigatorObservers: [routeObserver],
     );
   }
 }