63 lines
1.8 KiB
Dart
63 lines
1.8 KiB
Dart
import 'package:oktoast/oktoast.dart' as ok;
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import 'debug_log.dart';
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/// Toast 位置
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enum ToastGravity { top, center, bottom }
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const _duration = Duration(seconds: 2);
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/// Toast 队列：一条消失后回调里再弹下一条（时序由 oktoast 精确控制）
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final _queue = <_ToastItem>[];
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bool _isShowing = false;
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class _ToastItem {
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final String message;
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final ToastGravity gravity;
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_ToastItem(this.message, this.gravity);
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}
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/// 显示 Toast 消息（连续调用会排队，一条消失后再弹下一条）
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void showToast(String message, {ToastGravity? gravity}) {
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if (message.isEmpty) return;
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// 相邻重复的直接忽略，避免同一句刷屏
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if (_queue.isNotEmpty && _queue.last.message == message) return;
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_queue.add(_ToastItem(message, gravity ?? ToastGravity.center));
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_drain();
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}
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void _drain() {
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if (_isShowing || _queue.isEmpty) return;
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_isShowing = true;
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final item = _queue.removeAt(0);
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var done = false;
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void next() {
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if (done) return;
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done = true;
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_isShowing = false;
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_drain();
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}
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try {
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ok.showToast(
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item.message,
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duration: _duration,
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position: switch (item.gravity) {
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ToastGravity.top => ok.ToastPosition.top,
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ToastGravity.bottom => ok.ToastPosition.bottom,
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ToastGravity.center => ok.ToastPosition.center,
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},
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onDismiss: next,
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);
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} catch (e) {
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// OKToast 未挂载(启动早期)时 oktoast 直接抛错，不兜住的话 _isShowing 永久为 true → 全 App toast 静默失效
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debugLog("showToast()...error:$e");
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_queue.clear();
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_isShowing = false;
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return;
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}
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// 兜底：toast 被提前 dismiss 或 overlay 已销毁时 oktoast 不回调 onDismiss，超时自愈
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Future.delayed(_duration + const Duration(milliseconds: 500), next);
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}
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