v7

lib/v8/app/navigation/router/route_history_manager.dart

@@ -0,0 +1,47 @@
+import 'iroute_config.dart';
+
+typedef OnRouteChange = void Function(IRouteConfig config);
+
+class RouteHistoryManager{
+  final List<IRouteConfig> _histories = [];
+  final List<IRouteConfig> _backHistories = [];
+
+  List<IRouteConfig> get histories => _histories.reversed.toList();
+
+  bool get hasHistory => _histories.length > 1;
+
+  bool get hasBackHistory => _backHistories.isNotEmpty;
+
+  /// 将 [config] 加入历史记录
+  void recode(IRouteConfig config){
+    if (_histories.isNotEmpty && config.path == _histories.last.path) return;
+    _histories.add(config);
+  }
+
+  /// 历史回退操作
+  /// 将当前顶层移除，并加入 [_backHistories] 撤销列表
+  /// 并转到前一路径 [_histories.last]
+  void back(OnRouteChange callback) {
+    if (!hasHistory) return;
+    IRouteConfig top = _histories.removeLast();
+    _backHistories.add(top);
+    if (_histories.isNotEmpty) {
+      callback(_histories.last);
+    }
+  }
+
+  /// 撤销回退操作
+  /// 取出回退列表的最后元素，跳转到该路径
+  void revocation(OnRouteChange callback) {
+    IRouteConfig target = _backHistories.removeLast();
+    callback(target);
+  }
+
+  void close(int index) {
+    _histories.removeAt(index);
+  }
+
+  void clear() {
+    _histories.clear();
+  }
+}