v6

lib/v6/app/navigation/router/app_router_delegate.dart

@@ -0,0 +1,154 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+
+import 'iroute.dart';
+
+const List<String> kDestinationsPaths = [
+  '/color',
+  '/counter',
+  '/user',
+  '/settings',
+];
+
+AppRouterDelegate router = AppRouterDelegate();
+
+class AppRouterDelegate extends RouterDelegate<Object> with ChangeNotifier {
+  String _path = '/color';
+
+  String get path => _path;
+  AppRouterDelegate() {
+    // keepAlivePath.add('/color');
+  }
+
+  int? get activeIndex {
+    if (path.startsWith('/color')) return 0;
+    if (path.startsWith('/counter')) return 1;
+    if (path.startsWith('/user')) return 2;
+    if (path.startsWith('/settings')) return 3;
+    return null;
+  }
+
+  final Map<String, Completer<dynamic>> _completerMap = {};
+
+  Completer<dynamic>? completer;
+
+  final Map<String, dynamic> _pathExtraMap = {};
+
+  final List<String> keepAlivePath = [];
+
+  FutureOr<dynamic> changePath(String value,
+      {bool forResult = false, Object? extra, bool keepAlive = false}) {
+    if (forResult) {
+      _completerMap[value] = Completer();
+    }
+    if (keepAlive) {
+      if (keepAlivePath.contains(value)) {
+        keepAlivePath.remove(value);
+      }
+      keepAlivePath.add(value);
+    }
+    if (extra != null) {
+      _pathExtraMap[value] = extra;
+    }
+    path = value;
+    if (forResult) {
+      return _completerMap[value]!.future;
+    }
+  }
+
+  set path(String value) {
+    if (_path == value) return;
+    _path = value;
+    notifyListeners();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Navigator(
+      onPopPage: _onPopPage,
+      pages: _buildPages(context, path),
+    );
+  }
+
+  List<Page> _buildPages(BuildContext context,String path) {
+    List<Page> pages = [];
+    List<Page> topPages = _buildPageByPath(context,path);
+
+    if (keepAlivePath.isNotEmpty) {
+      for (String alivePath in keepAlivePath) {
+        if (alivePath != path) {
+          pages.addAll(_buildPageByPath(context,alivePath));
+        }
+      }
+
+      /// 去除和 topPages 中重复的界面
+      pages.removeWhere(
+          (element) => topPages.map((e) => e.key).contains(element.key));
+    }
+
+    pages.addAll(topPages);
+    return pages;
+  }
+
+  Page? _buildPageByPathFromTree(BuildContext context, String path) {
+    // 1. 根据 path 在 iroute 树中查询节点
+    IRoute? iroute = root.match(path);
+    Object? extra = _pathExtraMap[path];
+    bool keepAlive = keepAlivePath.contains(path);
+    bool forResult = _completerMap.containsKey(path);
+    Page? page;
+    if (iroute != null) {
+      page = iroute.builder?.call(
+        context,
+        IRouteData(
+          uri: Uri.parse(path),
+          extra: extra,
+          keepAlive: keepAlive,
+          forResult: forResult,
+        ),
+      );
+    }
+    return page;
+  }
+
+  List<Page> _buildPageByPath(BuildContext context,String path) {
+    List<Page> result = [];
+    Uri uri = Uri.parse(path);
+    String dist = '';
+    for (String segment in uri.pathSegments) {
+      dist += '/$segment';
+      Page? page = _buildPageByPathFromTree(context,dist);
+      if(page!=null){
+        result.add(page);
+      }
+    }
+    return result;
+  }
+
+  @override
+  Future<bool> popRoute() async {
+    print('=======popRoute=========');
+    return true;
+  }
+
+  bool _onPopPage(Route route, result) {
+    if (_completerMap.containsKey(path)) {
+      _completerMap[path]?.complete(result);
+      _completerMap.remove(path);
+    }
+
+    path = backPath(path);
+    return route.didPop(result);
+  }
+
+  String backPath(String path) {
+    Uri uri = Uri.parse(path);
+    if (uri.pathSegments.length == 1) return path;
+    List<String> parts = List.of(uri.pathSegments)..removeLast();
+    return '/${parts.join('/')}';
+  }
+
+  @override
+  Future<void> setNewRoutePath(configuration) async {}
+}