feat: save window size and resize on startup (#332)

ui/flutter/lib/app/modules/app/controllers/app_controller.dart

@@ -21,6 +21,7 @@ import '../../../../util/locale_manager.dart';
 import '../../../../util/log_util.dart';
 import '../../../../util/package_info.dart';
 import '../../../../util/util.dart';
+import '../../../../util/window_util.dart' as windows_util;
 import '../../../routes/app_pages.dart';
 
 const _startConfigNetwork = "start.network";
@@ -123,6 +124,26 @@ class AppController extends GetxController with WindowListener, TrayListener {
     trayManager.popUpContextMenu();
   }
 
+  @override
+  void onWindowMaximize() {
+    windows_util.saveState(isMaximized: true);
+  }
+
+  @override
+  void onWindowUnmaximize() {
+    windows_util.saveState(isMaximized: false);
+  }
+
+  final _windowsResizeSave = Util.debounce(() async {
+    final size = await windowManager.getSize();
+    windows_util.saveState(width: size.width, height: size.height);
+  }, 500);
+
+  @override
+  void onWindowResize() {
+    _windowsResizeSave();
+  }
+
   Future<void> _initDeepLinks() async {
     // currently only support android
     if (!Util.isAndroid()) {

ui/flutter/lib/app/modules/create/views/create_view.dart

@@ -4,16 +4,14 @@ import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:get/get.dart';
-import 'package:gopeed/app/modules/history/controller/history_controller.dart';
-import 'package:gopeed/app/modules/history/views/history_view.dart';
 import 'package:path/path.dart' as path;
 import 'package:rounded_loading_button/rounded_loading_button.dart';
+
 import '../../../../api/api.dart';
 import '../../../../api/model/create_task.dart';
 import '../../../../api/model/options.dart';
 import '../../../../api/model/request.dart';
 import '../../../../api/model/resolve_result.dart';
-import '../../../../api/model/resource.dart';
 import '../../../../util/input_formatter.dart';
 import '../../../../util/message.dart';
 import '../../../../util/util.dart';
@@ -21,6 +19,8 @@ import '../../../routes/app_pages.dart';
 import '../../../views/directory_selector.dart';
 import '../../../views/file_list_view.dart';
 import '../../app/controllers/app_controller.dart';
+import '../../history/controller/history_controller.dart';
+import '../../history/views/history_view.dart';
 import '../controllers/create_controller.dart';
 
 class CreateView extends GetView<CreateController> {

ui/flutter/lib/main.dart

@@ -13,6 +13,7 @@ import 'util/log_util.dart';
 import 'util/mac_secure_util.dart';
 import 'util/package_info.dart';
 import 'util/util.dart';
+import 'util/window_util.dart' as windows_util;
 
 void main() async {
   await init();
@@ -25,15 +26,21 @@ Future<void> init() async {
   WidgetsFlutterBinding.ensureInitialized();
   if (Util.isDesktop()) {
     await windowManager.ensureInitialized();
-    const windowOptions = WindowOptions(
-      size: Size(800, 600),
+    final windowState = await windows_util.loadState();
+    final windowOptions = WindowOptions(
+      size: Size(windowState.width, windowState.height),
       center: true,
       skipTaskbar: false,
     );
-    windowManager.waitUntilReadyToShow(windowOptions, () async {
+    await windowManager.waitUntilReadyToShow(windowOptions, () async {
       await windowManager.show();
       await windowManager.focus();
       await windowManager.setPreventClose(true);
+      // windows_manager has a bug where when window to be maximized, it will be unmaximized immediately, so can't implement this feature currently.
+      // https://github.com/leanflutter/window_manager/issues/412
+      // if (windowState.isMaximized) {
+      //   await windowManager.maximize();
+      // }
     });
   }
 

ui/flutter/lib/util/util.dart

@@ -143,4 +143,12 @@ class Util {
     }
     return completer.future;
   }
+
+  static void Function() debounce(Function() fn, int ms) {
+    Timer? timer;
+    return () {
+      timer?.cancel();
+      timer = Timer(Duration(milliseconds: ms), fn);
+    };
+  }
 }

ui/flutter/lib/util/window_util.dart

@@ -0,0 +1,39 @@
+import 'dart:async';
+
+import 'package:shared_preferences/shared_preferences.dart';
+
+class WindowState {
+  late bool isMaximized;
+  late double width;
+  late double height;
+
+  WindowState(this.isMaximized, this.width, this.height);
+}
+
+const String _windowStateIsMaximized = "window.isMaximized";
+const String _windowStateWidth = "window.width";
+const String _windowStateHeight = "window.height";
+
+/// Save window state to storage.
+void saveState({bool? isMaximized, double? width, double? height}) async {
+  final prefs = await SharedPreferences.getInstance();
+  if (isMaximized != null) {
+    await prefs.setBool(_windowStateIsMaximized, isMaximized);
+  }
+  if (width != null) {
+    await prefs.setDouble(_windowStateWidth, width);
+  }
+  if (height != null) {
+    await prefs.setDouble(_windowStateHeight, height);
+  }
+}
+
+/// Load window state from storage.
+Future<WindowState> loadState() async {
+  final prefs = await SharedPreferences.getInstance();
+  return WindowState(
+    prefs.getBool(_windowStateIsMaximized) ?? false,
+    prefs.getDouble(_windowStateWidth) ?? 800,
+    prefs.getDouble(_windowStateHeight) ?? 600,
+  );
+}