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lib/13/02/main.dart

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+import 'package:flutter/material.dart';
+import 'package:url_strategy/url_strategy.dart';
+
+import 'pages/app.dart';
+
+
+
+void main() {
+  setHashUrlStrategy();
+  runApp(const App());
+}
+
+
+
+

lib/13/02/pages/app.dart

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+import 'package:flutter/material.dart';
+import 'package:iroute/13/02/store/app_state.dart';
+import '../route/parser.dart';
+import '../route/route_state.dart';
+
+class App extends StatefulWidget {
+  const App({super.key});
+
+  @override
+  State<App> createState() => _AppState();
+}
+
+class _AppState extends State<App> {
+  late final RootRouterDelegate _delegate;
+  late final AppRouteParser _parser;
+  late final AppState _appState;
+  late final RouteState _routeState;
+
+  @override
+  void initState() {
+    super.initState();
+    _parser = AppRouteParser(initialRoute: '/color', allowPaths: [
+      '/color',
+      '/color/add',
+      '/color/detail/:colorHex',
+    ]);
+    _appState = AppState.initial();
+    _routeState = RouteState(_parser);
+    _delegate = RootRouterDelegate(_routeState);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AppStateScope(
+      notifier: _appState,
+      child: RouteStateScope(
+        notifier: _routeState,
+        child: MaterialApp.router(
+          routerDelegate: _delegate,
+          routeInformationParser: _parser,
+          theme: ThemeData(
+              useMaterial3: true,
+              appBarTheme: const AppBarTheme(
+                  elevation: 0,
+                  iconTheme: IconThemeData(color: Colors.black),
+                  titleTextStyle: TextStyle(
+                    color: Colors.black,
+                    fontSize: 18,
+                    fontWeight: FontWeight.bold,
+                  ))),
+          debugShowCheckedModeBanner: false,
+        ),
+      ),
+    );
+  }
+}

lib/13/02/pages/color_add_page.dart

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+import 'dart:math';
+
+import 'package:flutter/material.dart';
+
+class ColorAddPage extends StatefulWidget {
+  const ColorAddPage({super.key});
+
+  @override
+  State<ColorAddPage> createState() => _ColorAddPageState();
+}
+
+class _ColorAddPageState extends State<ColorAddPage> {
+  late Color _color;
+
+  @override
+  void initState() {
+    super.initState();
+    _color = randomColor;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    String text = '# ${_color.value.toRadixString(16)}';
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('添加颜色'),
+        actions: [IconButton(onPressed: _selectColor, icon: Icon(Icons.check ))],
+      ),
+      body: Padding(
+        padding: const EdgeInsets.symmetric(horizontal: 16.0,vertical: 20),
+        child: Row(
+          children: [
+            Expanded(child: Text(text,style: TextStyle(color: _color,fontSize: 24,letterSpacing: 4),)),
+            Container(
+              margin: EdgeInsets.only(left: 10),
+              width: 40,
+              height: 40,
+              child: Icon(
+                Icons.sell_outlined,
+                color: Colors.white,
+              ),
+              decoration: BoxDecoration(
+                color: _color,
+                borderRadius: BorderRadius.circular(8),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Random _random = Random();
+
+  Color get randomColor {
+    return Color.fromARGB(
+      255,
+      _random.nextInt(256),
+      _random.nextInt(256),
+      _random.nextInt(256),
+    );
+  }
+
+  void _selectColor() {
+    Navigator.of(context).pop(_color);
+  }
+}

lib/13/02/pages/home_page.dart

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+import 'package:flutter/material.dart';
+import 'package:iroute/13/02/store/app_state.dart';
+import '../route/route_state.dart';
+import 'color_add_page.dart';
+
+import '../../../common/components/colors_panel.dart';
+import '../../../common/pages/stl_color_page.dart';
+
+class HomePage extends StatefulWidget {
+  const HomePage({super.key});
+
+  @override
+  State<HomePage> createState() => _HomePageState();
+}
+
+class _HomePageState extends State<HomePage> {
+
+
+  @override
+  Widget build(BuildContext context) {
+    AppState state = AppStateScope.of(context);
+    return Scaffold(
+      appBar: AppBar(title:const Text('颜色主页')),
+      floatingActionButton: FloatingActionButton(
+        onPressed: _toAddPage,
+        child: const Icon(Icons.add),
+      ),
+      body: ColorsPanel(
+        colors: state.colors,
+        onSelect: _selectColor,
+      ),
+    );
+  }
+
+  void _selectColor(Color color){
+    String value = '#${color.value.toRadixString(16)}';
+    RouteStateScope.of(context).update('/color/detail/$value');
+  }
+
+  void _toAddPage() async {
+    RouteStateScope.of(context).update('/color/add');
+  }
+}

lib/13/02/route/parsed_route.dart

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+// Copyright 2021, the Flutter project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:collection/collection.dart';
+import 'package:quiver/core.dart';
+
+/// A route path that has been parsed by [TemplateRouteParser].
+class ParsedRoute {
+  /// The current path location without query parameters. (/book/123)
+  final String path;
+
+  /// The path template (/book/:id)
+  final String pathTemplate;
+
+  /// The path parameters ({id: 123})
+  final Map<String, String> parameters;
+
+  /// The query parameters ({search: abc})
+  final Map<String, String> queryParameters;
+
+  static const _mapEquality = MapEquality<String, String>();
+
+  ParsedRoute(
+      this.path, this.pathTemplate, this.parameters, this.queryParameters);
+
+  @override
+  bool operator ==(Object other) =>
+      other is ParsedRoute &&
+      other.pathTemplate == pathTemplate &&
+      other.path == path &&
+      _mapEquality.equals(parameters, other.parameters) &&
+      _mapEquality.equals(queryParameters, other.queryParameters);
+
+  @override
+  int get hashCode => hash4(
+        path,
+        pathTemplate,
+        _mapEquality.hash(parameters),
+        _mapEquality.hash(queryParameters),
+      );
+
+  @override
+  String toString() => '<ParsedRoute '
+      'template: $pathTemplate '
+      'path: $path '
+      'parameters: $parameters '
+      'query parameters: $queryParameters>';
+}

lib/13/02/route/parser.dart

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+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:iroute/common/pages/stl_color_page.dart';
+import 'package:path_to_regexp/path_to_regexp.dart';
+import '../pages/home_page.dart';
+import '../pages/color_add_page.dart';
+import '../store/app_state.dart';
+import 'parsed_route.dart';
+import 'route_state.dart';
+
+class AppRouteParser extends RouteInformationParser<ParsedRoute> {
+  final List<String> allowPaths;
+  final ParsedRoute initialRoute;
+
+  AppRouteParser({
+    required this.allowPaths,
+    String initialRoute = '/',
+  }) : initialRoute = ParsedRoute(initialRoute, initialRoute, {}, {});
+
+  @override
+  Future<ParsedRoute> parseRouteInformation(
+      RouteInformation routeInformation) async {
+    print(
+        "=======parseRouteInformation:${routeInformation.uri.path}===================");
+
+    final uri = routeInformation.uri;
+    final path = uri.toString();
+    final queryParams = uri.queryParameters;
+
+    ParsedRoute parsedRoute = initialRoute;
+
+    for (var pathTemplate in allowPaths) {
+      final parameters = <String>[];
+      var pathRegExp = pathToRegExp(pathTemplate, parameters: parameters);
+      if (pathRegExp.hasMatch(path)) {
+        final match = pathRegExp.matchAsPrefix(path);
+        if (match == null) continue;
+        final params = extract(parameters, match);
+        parsedRoute = ParsedRoute(path, pathTemplate, params, queryParams);
+      }
+    }
+    return parsedRoute;
+  }
+
+  @override
+  RouteInformation? restoreRouteInformation(ParsedRoute configuration) {
+    print("=======restoreRouteInformation:${configuration}===================");
+
+    return RouteInformation(uri: Uri.parse(configuration.path));
+  }
+}
+
+class RootRouterDelegate extends RouterDelegate<ParsedRoute>
+    with ChangeNotifier, PopNavigatorRouterDelegateMixin {
+  final RouteState routeState;
+
+  RootRouterDelegate(this.routeState) {
+    routeState.addListener(notifyListeners);
+  }
+
+  @override
+  final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();
+
+  @override
+  ParsedRoute get currentConfiguration {
+    print("=======currentConfiguration:${routeState.route.path}===================");
+
+    return routeState.route;
+  }
+
+  @override
+  void dispose() {
+    routeState.removeListener(notifyListeners);
+    routeState.dispose();
+    super.dispose();
+  }
+
+  final _addColorKey = const ValueKey('addColor');
+  final _detailColorKey = const ValueKey('detailColor');
+
+  @override
+  Widget build(BuildContext context) {
+    final routeState = RouteStateScope.of(context);
+    List<Page> pages = [];
+    final String pathTemplate = routeState.route.pathTemplate;
+
+    pages.add(MaterialPage(child: HomePage()));
+
+    String? selectedColor;
+
+    if (pathTemplate == '/color/detail/:colorHex') {
+      selectedColor = routeState.route.parameters['colorHex'];
+    }
+
+    if (selectedColor != null) {
+      int value = int.parse(
+          selectedColor.substring(
+            1,
+          ),
+          radix: 16);
+      pages.add(MaterialPage(
+        key: _detailColorKey,
+          child: StlColorPage(
+        color: Color(value),
+      )));
+    }
+
+    bool isAddPage = pathTemplate == '/color/add';
+    if (isAddPage) {
+      pages.add(
+        MaterialPage(key: _addColorKey, child: ColorAddPage()),
+      );
+    }
+    print("===build====================");
+    return Navigator(
+      key: navigatorKey,
+      pages: pages,
+      onPopPage: (route, result) {
+        print(result);
+        if (route.settings is Page &&
+            (route.settings as Page).key == _addColorKey) {
+          if(result is Color){
+            AppStateScope.of(context).addColor(result);
+          }
+          routeState.update('/color');
+        }
+
+        if (route.settings is Page &&
+            (route.settings as Page).key == _detailColorKey) {
+          routeState.update('/color');
+        }
+        // appState.selectedBook = null;
+        // notifyListeners();
+        return route.didPop(result);
+      },
+    );
+  }
+
+  /// 格式: /a /b
+
+  @override
+  Future<void> setNewRoutePath(ParsedRoute configuration) async {
+    print("===setNewRoutePath===${configuration}=================");
+    routeState.route = configuration;
+    return;
+  }
+
+// @override
+// Future<void> setInitialRoutePath( configuration) async{
+//   _pages = [_pageMap['/']!];
+//   notifyListeners();
+// }
+}

lib/13/02/route/route_state.dart

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+// Copyright 2021, the Flutter project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:flutter/widgets.dart';
+
+import 'parsed_route.dart';
+import 'parser.dart';
+
+/// The current route state. To change the current route, call obtain the state
+/// using `RouteStateScope.of(context)` and call `go()`:
+///
+/// ```
+/// RouteStateScope.of(context).go('/book/2');
+/// ```
+class RouteState extends ChangeNotifier {
+  final AppRouteParser _parser;
+  ParsedRoute _route;
+
+  RouteState(this._parser) : _route = _parser.initialRoute;
+
+  ParsedRoute get route => _route;
+
+  set route(ParsedRoute route) {
+    // Don't notify listeners if the path hasn't changed.
+    if (_route == route) return;
+
+    _route = route;
+    notifyListeners();
+  }
+
+  Future<void> update(String route) async {
+    this.route = await _parser
+        .parseRouteInformation(RouteInformation(uri: Uri.parse(route)));
+  }
+}
+
+/// Provides the current [RouteState] to descendant widgets in the tree.
+class RouteStateScope extends InheritedNotifier<RouteState> {
+  const RouteStateScope({
+    required super.notifier,
+    required super.child,
+    super.key,
+  });
+
+  static RouteState of(BuildContext context) =>
+      context.dependOnInheritedWidgetOfExactType<RouteStateScope>()!.notifier!;
+}

lib/13/02/store/app_state.dart

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+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+class AppState extends ChangeNotifier{
+  final List<Color> colors;
+
+  AppState({required this.colors,});
+
+  AppState.initial():colors=[
+    Colors.red, Colors.black, Colors.blue, Colors.green, Colors.orange,
+    Colors.pink, Colors.purple, Colors.indigo, Colors.amber, Colors.cyan,
+    Colors.redAccent, Colors.grey, Colors.blueAccent, Colors.greenAccent, Colors.orangeAccent,
+    Colors.pinkAccent, Colors.purpleAccent, Colors.indigoAccent, Colors.amberAccent, Colors.cyanAccent,
+  ];
+
+  void addColor(Color color){
+    colors.add(color);
+    notifyListeners();
+  }
+
+}
+
+/// Provides the current [RouteState] to descendant widgets in the tree.
+class AppStateScope extends InheritedNotifier<AppState> {
+  const AppStateScope({super.key, required super.child,  required super.notifier,});
+
+
+
+  static AppState of(BuildContext context) =>
+      context.dependOnInheritedWidgetOfExactType<AppStateScope>()!.notifier!;
+}