47 lines
1.2 KiB
Dart
47 lines
1.2 KiB
Dart
import 'iroute_config.dart';
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typedef OnRouteChange = void Function(IRouteConfig config);
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class RouteHistoryManager{
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final List<IRouteConfig> _histories = [];
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final List<IRouteConfig> _backHistories = [];
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List<IRouteConfig> get histories => _histories.reversed.toList();
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bool get hasHistory => _histories.length > 1;
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bool get hasBackHistory => _backHistories.isNotEmpty;
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/// 将 [config] 加入历史记录
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void recode(IRouteConfig config){
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if (_histories.isNotEmpty && config.path == _histories.last.path) return;
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_histories.add(config);
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}
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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(OnRouteChange callback) {
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if (!hasHistory) return;
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IRouteConfig top = _histories.removeLast();
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_backHistories.add(top);
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if (_histories.isNotEmpty) {
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callback(_histories.last);
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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(OnRouteChange callback) {
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IRouteConfig target = _backHistories.removeLast();
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callback(target);
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}
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void close(int index) {
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_histories.removeAt(index);
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}
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void clear() {
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_histories.clear();
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}
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} |