280 lines
9.1 KiB
Dart
280 lines
9.1 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter_markdown_plus/flutter_markdown_plus.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import '../../api/note_api.dart';
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import '../../core/network/api_exception.dart';
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import '../../utils/toast.dart';
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import '../../widgets/state_views.dart';
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/// 笔记编辑页
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///
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/// [noteId] 为 null 时是新建，否则是编辑已有笔记。
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/// 保存成功会 pop(true)，上一页据此刷新数据。
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///
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/// 这里用 StatefulWidget + TextEditingController 管理表单，
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/// 而不是像账单编辑页那样走 Notifier —— 后者需要额外的 revision
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/// 字段来同步受控输入框，对纯文本编辑没有必要。
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class NoteEditPage extends ConsumerStatefulWidget {
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const NoteEditPage({super.key, this.noteId});
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final int? noteId;
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bool get isCreate => noteId == null;
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@override
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ConsumerState<NoteEditPage> createState() => _NoteEditPageState();
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}
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class _NoteEditPageState extends ConsumerState<NoteEditPage> {
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final _titleController = TextEditingController();
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final _tagsController = TextEditingController();
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final _contentController = TextEditingController();
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bool _loading = false;
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bool _saving = false;
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bool _preview = false;
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String? _loadError;
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/// 是否已经成功保存过——用于「返回时提示未保存」的判断
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bool _saved = false;
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@override
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void initState() {
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super.initState();
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if (!widget.isCreate) _load();
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}
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@override
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void dispose() {
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_titleController.dispose();
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_tagsController.dispose();
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_contentController.dispose();
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super.dispose();
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}
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Future<void> _load() async {
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setState(() {
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_loading = true;
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_loadError = null;
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});
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try {
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final note = await ref.read(noteApiProvider).detail(widget.noteId!);
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if (!mounted) return;
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_titleController.text = note.title;
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_tagsController.text = note.tags.join(',');
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_contentController.text = note.content;
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setState(() => _loading = false);
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} on ApiException catch (e) {
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if (!mounted) return;
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setState(() {
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_loading = false;
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_loadError = e.message;
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});
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} catch (_) {
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if (!mounted) return;
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setState(() {
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_loading = false;
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_loadError = '笔记加载失败';
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});
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}
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}
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bool get _dirty =>
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!_saved &&
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(_titleController.text.isNotEmpty ||
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_tagsController.text.isNotEmpty ||
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_contentController.text.isNotEmpty);
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Future<void> _save() async {
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final title = _titleController.text.trim();
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final tags = _tagsController.text.trim();
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final content = _contentController.text;
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if (title.isEmpty && content.trim().isEmpty) {
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showToast(context, '标题和内容不能同时为空', error: true);
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return;
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}
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setState(() => _saving = true);
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try {
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final api = ref.read(noteApiProvider);
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if (widget.isCreate) {
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await api.create(title: title, content: content, tags: tags);
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} else {
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await api.update(widget.noteId!, title: title, content: content, tags: tags);
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}
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if (!mounted) return;
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_saved = true;
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showToast(context, '✅ 已保存');
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Navigator.of(context).pop(true);
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} on ApiException catch (e) {
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if (mounted) showToast(context, e.message, error: true);
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} catch (_) {
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if (mounted) showToast(context, '保存失败，请重试', error: true);
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} finally {
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if (mounted) setState(() => _saving = false);
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}
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}
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Future<void> _confirmDiscard() async {
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final leave = await showDialog<bool>(
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context: context,
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builder: (dialogContext) => AlertDialog(
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title: const Text('放弃编辑？'),
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content: const Text('当前改动还没有保存，返回将丢失。'),
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shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
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actions: [
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TextButton(
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onPressed: () => Navigator.pop(dialogContext, false),
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child: const Text('继续编辑', style: TextStyle(color: Color(0xFF8D6E63))),
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),
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TextButton(
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onPressed: () => Navigator.pop(dialogContext, true),
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child: const Text('放弃', style: TextStyle(color: Color(0xFFD32F2F))),
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),
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],
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),
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);
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if (leave == true && mounted) Navigator.of(context).pop(false);
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}
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@override
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Widget build(BuildContext context) {
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return PopScope(
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canPop: !_dirty,
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onPopInvokedWithResult: (didPop, _) {
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if (!didPop) _confirmDiscard();
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},
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child: Scaffold(
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appBar: AppBar(
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title: Text(widget.isCreate ? '新建笔记' : '编辑笔记'),
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actions: [
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IconButton(
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tooltip: _preview ? '继续编辑' : '预览',
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icon: Icon(_preview ? Icons.edit_outlined : Icons.visibility_outlined),
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onPressed: _loading ? null : () => setState(() => _preview = !_preview),
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),
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Padding(
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padding: const EdgeInsets.only(right: 8),
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child: TextButton(
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onPressed: (_saving || _loading) ? null : _save,
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child: _saving
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? const SizedBox(
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width: 16,
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height: 16,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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color: Color(0xFFC8956E),
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),
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)
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: const Text(
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'保存',
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style: TextStyle(
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fontSize: 15,
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fontWeight: FontWeight.w600,
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color: Color(0xFFC8956E),
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),
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),
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),
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),
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],
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),
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body: _body(),
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),
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);
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}
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Widget _body() {
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if (_loading) return const Center(child: LoadingView(tip: '笔记加载中...'));
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if (_loadError != null) {
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return Center(
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child: ErrorView(message: _loadError!, onRetry: _load),
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);
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}
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if (_preview) return _previewBody();
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return ListView(
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padding: const EdgeInsets.fromLTRB(20, 16, 20, 40),
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children: [
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TextField(
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controller: _titleController,
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style: const TextStyle(
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fontSize: 19,
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fontWeight: FontWeight.bold,
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color: Color(0xFF3E2723),
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),
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decoration: const InputDecoration(
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hintText: '标题（留空则自动取正文首行）',
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hintStyle: TextStyle(fontSize: 17, color: Color(0xFFD7CCC8)),
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border: InputBorder.none,
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),
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),
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const Divider(height: 20, color: Color(0xFFF0E6D8)),
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TextField(
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controller: _tagsController,
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style: const TextStyle(fontSize: 14, color: Color(0xFF5D4037)),
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decoration: const InputDecoration(
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hintText: '标签，用逗号分隔，例如：工作,服务器',
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hintStyle: TextStyle(fontSize: 13.5, color: Color(0xFFD7CCC8)),
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prefixIcon: Icon(Icons.label_outline, size: 18, color: Color(0xFFBCAAA4)),
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prefixIconConstraints: BoxConstraints(minWidth: 34),
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border: InputBorder.none,
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),
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),
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const Divider(height: 20, color: Color(0xFFF0E6D8)),
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TextField(
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controller: _contentController,
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maxLines: null,
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minLines: 16,
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keyboardType: TextInputType.multiline,
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textAlignVertical: TextAlignVertical.top,
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style: const TextStyle(fontSize: 15, height: 1.7, color: Color(0xFF3E2723)),
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decoration: const InputDecoration(
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hintText: '正文，支持 Markdown…',
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hintStyle: TextStyle(fontSize: 15, color: Color(0xFFD7CCC8)),
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border: InputBorder.none,
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),
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),
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],
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);
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}
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Widget _previewBody() {
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final content = _contentController.text;
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if (content.trim().isEmpty) {
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return const Center(
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child: EmptyView(icon: '📄', title: '还没有内容', tip: '切回编辑模式写点什么吧'),
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);
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}
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final base = MarkdownStyleSheet.fromTheme(Theme.of(context));
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return SingleChildScrollView(
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padding: const EdgeInsets.fromLTRB(20, 18, 20, 40),
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child: MarkdownBody(
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data: content,
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selectable: true,
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styleSheet: base.copyWith(
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p: const TextStyle(fontSize: 15, height: 1.75, color: Color(0xFF3E2723)),
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h1: const TextStyle(fontSize: 21, fontWeight: FontWeight.bold, color: Color(0xFF3E2723)),
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h2: const TextStyle(fontSize: 18, fontWeight: FontWeight.bold, color: Color(0xFF3E2723)),
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h3: const TextStyle(fontSize: 16, fontWeight: FontWeight.w600, color: Color(0xFF3E2723)),
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code: const TextStyle(
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fontSize: 13.5,
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fontFamily: 'monospace',
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backgroundColor: Color(0xFFF5EFE8),
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color: Color(0xFFB4654A),
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),
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codeblockDecoration: BoxDecoration(
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color: const Color(0xFFF7F3EE),
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borderRadius: BorderRadius.circular(10),
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border: Border.all(color: const Color(0xFFEDE3D8)),
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),
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),
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),
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);
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}
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}
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