109 lines
2.7 KiB
Dart
109 lines
2.7 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:go_router/go_router.dart';
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class RouterHistoryScope extends InheritedNotifier<RouterHistory> {
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const RouterHistoryScope({super.key, required super.child, super.notifier});
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static RouterHistory of(BuildContext context) {
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return context
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.dependOnInheritedWidgetOfExactType<RouterHistoryScope>()!
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.notifier!;
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}
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static RouterHistory read(BuildContext context) {
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return context
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.getInheritedWidgetOfExactType<RouterHistoryScope>()!
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.notifier!;
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}
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}
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class RouterHistory with ChangeNotifier {
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final List<String> exclusives;
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final GoRouterDelegate delegate;
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final List<RouteMatchList> _histories = [];
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final List<RouteMatchList> _backHistories = [];
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List<RouteMatchList> get histories => _histories;
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RouterHistory(this.delegate, {this.exclusives = const []}) {
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delegate.addListener(_onRouteChange);
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}
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/// 用于记录当前历史记录
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/// 清空历史之后，切换时，先记录 _current
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RouteMatchList? _current;
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void _onRouteChange() {
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/// 当没有历史，且 _current 非空
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if (_histories.isEmpty && _current != null) {
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_histories.add(_current!);
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}
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RouteMatchList matchList = delegate.currentConfiguration;
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if (_histories.isNotEmpty && matchList == _histories.last
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|| matchList.isEmpty
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) return;
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String uri = matchList.last.matchedLocation;
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if (exclusives.contains(uri)) {
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return;
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}
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_recode(matchList);
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}
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/// 将 [history] 加入历史记录
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void _recode(RouteMatchList history) {
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_current = history;
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_histories.add(history);
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if (hasHistory) {
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notifyListeners();
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}
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}
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bool get hasHistory => _histories.length > 1;
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bool get hasBackHistory => _backHistories.isNotEmpty;
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/// 历史回退操作
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/// 将当前顶层移除，并加入 [_backHistories] 撤销列表
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/// 并转到前一路径 [_histories.last]
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void back() {
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if (!hasHistory) {
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return;
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}
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RouteMatchList top = _histories.removeLast();
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_backHistories.add(top);
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if (_histories.isNotEmpty) {
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delegate.setNewRoutePath(_histories.last);
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notifyListeners();
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}
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}
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/// 撤销回退操作
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/// 取出回退列表的最后元素，跳转到该路径
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void revocation() {
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RouteMatchList target = _backHistories.removeLast();
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delegate.setNewRoutePath(target);
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notifyListeners();
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}
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void close(RouteMatchList history) {
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_histories.remove(history);
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notifyListeners();
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}
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void clear() {
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_histories.clear();
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notifyListeners();
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}
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void select(RouteMatchList history) {
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_histories.remove(history);
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delegate.setNewRoutePath(history);
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}
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}
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