generated from dellevin/template
328 lines
16 KiB
Dart
328 lines
16 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import '../../providers/app_provider.dart';
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import '../../models/data_models.dart';
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import '../../utils/user_prefs.dart';
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import '../../widgets/note_list_item.dart';
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import '../../widgets/shimmer_skeleton.dart';
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import '../../widgets/fade_in_local_image.dart';
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/// 笔记标签页（分页 + 触底加载）
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class NoteTabPage extends StatefulWidget {
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const NoteTabPage({super.key});
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@override
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State<NoteTabPage> createState() => _NoteTabPageState();
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}
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class _NoteTabPageState extends State<NoteTabPage> {
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final List<Note> _items = [];
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bool _hasMore = true;
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bool _isLoading = false;
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int _offset = 0;
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late ScrollController _scrollController;
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AppProvider? _provider;
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int _layoutStyle = 0;
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bool _initialized = false;
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int _lastDataCount = -1;
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DateTime? _lastUpdatedAt;
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int _lastScrollSignal = 0;
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@override
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void initState() {
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super.initState();
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_layoutStyle = UserPrefs().noteLayoutStyle;
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_scrollController = ScrollController()..addListener(_onScroll);
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WidgetsBinding.instance.addPostFrameCallback((_) {
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final provider = context.read<AppProvider>();
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_provider = provider;
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provider.addListener(_onDataChanged);
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_lastDataCount = provider.notes.length;
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if (provider.notes.isNotEmpty) _lastUpdatedAt = provider.notes.first.updatedAt;
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_loadFirst();
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});
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}
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@override
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void dispose() {
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_provider?.removeListener(_onDataChanged);
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_scrollController.dispose();
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super.dispose();
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}
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void _onDataChanged() {
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if (!_initialized || !mounted) return;
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final provider = context.read<AppProvider>();
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// 检查回到顶部信号
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if (provider.scrollToTopSignal != _lastScrollSignal && provider.scrollToTopSignal > 0) {
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_lastScrollSignal = provider.scrollToTopSignal;
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if (_scrollController.hasClients) {
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_scrollController.animateTo(0, duration: const Duration(milliseconds: 300), curve: Curves.easeOut);
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}
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}
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final count = provider.notes.length;
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final latest = provider.notes.isNotEmpty ? provider.notes.first.updatedAt : null;
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if (count != _lastDataCount || latest != _lastUpdatedAt) {
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_lastDataCount = count;
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_lastUpdatedAt = latest;
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WidgetsBinding.instance.addPostFrameCallback((_) {
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if (mounted) _loadFirst();
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});
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}
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}
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void _onScroll() {
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if (_scrollController.position.pixels >= _scrollController.position.maxScrollExtent - 200) {
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_loadMore();
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}
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}
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Future<void> _loadFirst() async {
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_initialized = true;
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setState(() { _isLoading = true; _offset = 0; _hasMore = true; });
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final list = await context.read<AppProvider>().loadNotesPaged(offset: 0);
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if (!mounted) return;
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setState(() { _items.clear(); _items.addAll(list); _offset = list.length; _hasMore = list.length >= 20; _isLoading = false; });
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}
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Future<void> _loadMore() async {
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if (_isLoading || !_hasMore) return;
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setState(() => _isLoading = true);
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final list = await context.read<AppProvider>().loadNotesPaged(offset: _offset);
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if (!mounted) return;
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setState(() { _items.addAll(list); _offset += list.length; _hasMore = list.length >= 20; _isLoading = false; });
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}
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Future<void> _refresh() async {
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await context.read<AppProvider>().loadNotes();
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await _loadFirst();
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}
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@override
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Widget build(BuildContext context) {
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final colors = Theme.of(context).colorScheme;
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return Consumer<AppProvider>(builder: (context, provider, _) {
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if (_items.isEmpty && _isLoading) return _buildSkeleton();
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if (_items.isEmpty) {
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return RefreshIndicator(onRefresh: _refresh, color: colors.primary, backgroundColor: colors.surface,
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child: ListView(physics: const AlwaysScrollableScrollPhysics(), children: [_buildEmptyState(context)]));
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}
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if (_layoutStyle == 1) return _buildWaterfallView();
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if (_layoutStyle == 2) return _buildTimelineView();
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return _buildListView();
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});
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}
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Widget _buildSkeleton() {
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switch (_layoutStyle) {
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case 1: return _buildWaterfallSkeleton();
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case 2: return const NoteSkeletonTimeline();
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default: return const NoteSkeletonList();
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}
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}
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Widget _buildWaterfallSkeleton() {
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final colors = Theme.of(context).colorScheme;
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return SingleChildScrollView(padding: const EdgeInsets.fromLTRB(12, 8, 12, 100),
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child: Row(crossAxisAlignment: CrossAxisAlignment.start, children: List.generate(2, (_) => Expanded(
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child: Column(children: List.generate(4, (_) => Container(margin: const EdgeInsets.only(bottom: 8),
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decoration: BoxDecoration(color: colors.surface, borderRadius: BorderRadius.circular(10),
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boxShadow: [BoxShadow(color: Colors.black.withValues(alpha: 0.04), blurRadius: 6, offset: const Offset(0, 2))]),
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child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
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const ShimmerSkeleton(width: double.infinity, height: 140, borderRadius: 10),
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Padding(padding: const EdgeInsets.all(10), child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
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const ShimmerSkeleton(width: double.infinity, height: 14), const SizedBox(height: 6),
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const ShimmerSkeleton(width: double.infinity, height: 12), const SizedBox(height: 6),
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const ShimmerSkeleton(width: 60, height: 10),
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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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Widget _buildListView() {
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final colors = Theme.of(context).colorScheme;
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return RefreshIndicator(onRefresh: _refresh, color: colors.primary, backgroundColor: colors.surface,
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child: ListView.builder(controller: _scrollController, padding: const EdgeInsets.fromLTRB(12, 10, 12, 100),
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itemCount: _items.length + (_hasMore ? 1 : 0),
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itemBuilder: (context, index) {
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if (index >= _items.length) return _buildLoadMore();
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return NoteListItem(note: _items[index]);
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},
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),
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);
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}
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Widget _buildTimelineView() {
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final colors = Theme.of(context).colorScheme;
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return RefreshIndicator(onRefresh: _refresh, color: colors.primary, backgroundColor: colors.surface,
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child: ListView.builder(controller: _scrollController, padding: const EdgeInsets.fromLTRB(12, 8, 12, 100),
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itemCount: _items.length + (_hasMore ? 1 : 0),
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itemBuilder: (context, index) {
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if (index >= _items.length) return _buildLoadMore();
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return _buildTimelineItem(_items[index]);
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},
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),
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);
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}
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Widget _buildTimelineItem(Note note) {
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final colors = Theme.of(context).colorScheme;
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return GestureDetector(
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onTap: () => Navigator.pushNamed(context, '/note-detail', arguments: note).then((_) => _loadFirst()),
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onLongPress: () => _showDeleteDialog(context, note),
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child: IntrinsicHeight(child: Row(crossAxisAlignment: CrossAxisAlignment.stretch, children: [
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SizedBox(width: 40, child: Column(children: [
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Container(width: 10, height: 10,
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decoration: BoxDecoration(color: colors.primary, shape: BoxShape.circle, border: Border.all(color: colors.surface, width: 2))),
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Expanded(child: Container(width: 1, color: colors.outline)),
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])),
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Expanded(child: Container(margin: const EdgeInsets.only(bottom: 16), padding: const EdgeInsets.all(14),
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decoration: BoxDecoration(color: colors.surfaceContainerHigh, borderRadius: BorderRadius.circular(12)),
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child: Column(crossAxisAlignment: CrossAxisAlignment.start, mainAxisSize: MainAxisSize.min, children: [
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Text(_formatFullDate(note.updatedAt), style: TextStyle(fontSize: 11, color: colors.onSurface.withValues(alpha: 0.4))),
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if (note.title.isNotEmpty) ...[const SizedBox(height: 6),
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Text(note.title, style: TextStyle(fontSize: 15, fontWeight: FontWeight.w600, color: colors.onSurface), maxLines: 1, overflow: TextOverflow.ellipsis),
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],
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const SizedBox(height: 6),
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Text(_getPreviewText(note), maxLines: 2, overflow: TextOverflow.ellipsis,
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style: TextStyle(fontSize: 13, color: colors.onSurface.withValues(alpha: 0.5), height: 1.5)),
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if (note.tags.isNotEmpty) ...[const SizedBox(height: 8),
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Wrap(spacing: 6, runSpacing: 4, children: note.tags.map((tag) => Container(
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padding: const EdgeInsets.symmetric(horizontal: 7, vertical: 2),
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decoration: BoxDecoration(color: colors.surface, borderRadius: BorderRadius.circular(4)),
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child: Text(tag, style: TextStyle(fontSize: 10, color: colors.onSurface.withValues(alpha: 0.4))),
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)).toList()),
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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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String _formatFullDate(DateTime date) =>
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'${date.year}-${date.month.toString().padLeft(2, '0')}-${date.day.toString().padLeft(2, '0')} ${date.hour.toString().padLeft(2, '0')}:${date.minute.toString().padLeft(2, '0')}';
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Widget _buildWaterfallView() {
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final colors = Theme.of(context).colorScheme;
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final leftItems = <Note>[];
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final rightItems = <Note>[];
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for (int i = 0; i < _items.length; i++) {
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(i % 2 == 0 ? leftItems : rightItems).add(_items[i]);
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}
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return RefreshIndicator(onRefresh: _refresh, color: colors.primary, backgroundColor: colors.surface,
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child: SingleChildScrollView(controller: _scrollController, padding: const EdgeInsets.fromLTRB(12, 8, 12, 100),
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child: Row(crossAxisAlignment: CrossAxisAlignment.start, children: [
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Expanded(child: Column(children: [...leftItems.map(_buildWaterfallCard), if (_hasMore) _buildLoadMore()])),
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const SizedBox(width: 8),
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Expanded(child: Column(children: rightItems.map(_buildWaterfallCard).toList())),
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]),
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),
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);
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}
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Widget _buildWaterfallCard(Note note) {
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final colors = Theme.of(context).colorScheme;
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final contentText = _getPreviewText(note);
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final images = note.images;
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final hasImage = images.isNotEmpty;
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final extraCount = images.length - 1;
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return GestureDetector(
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onTap: () => Navigator.pushNamed(context, '/note-detail', arguments: note).then((_) => _loadFirst()),
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onLongPress: () => _showDeleteDialog(context, note),
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child: Container(margin: const EdgeInsets.only(bottom: 8),
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decoration: BoxDecoration(color: colors.surface, borderRadius: BorderRadius.circular(10),
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boxShadow: [BoxShadow(color: Colors.black.withValues(alpha: 0.04), blurRadius: 6, offset: const Offset(0, 2))]),
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clipBehavior: Clip.antiAlias,
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child: Column(crossAxisAlignment: CrossAxisAlignment.start, mainAxisSize: MainAxisSize.min, children: [
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if (hasImage) Stack(children: [
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ClipRRect(borderRadius: const BorderRadius.vertical(top: Radius.circular(10)),
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child: FadeInLocalImage(path: images.first, fit: BoxFit.cover, errorWidget: const SizedBox.shrink())),
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if (extraCount > 0) Positioned(top: 6, right: 6,
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child: Container(padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
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decoration: BoxDecoration(color: Colors.black.withValues(alpha: 0.45), borderRadius: BorderRadius.circular(10)),
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child: Text('+$extraCount', style: const TextStyle(fontSize: 11, color: Colors.white, fontWeight: FontWeight.w600)),
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),
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),
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]),
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Padding(padding: const EdgeInsets.fromLTRB(10, 8, 10, 10),
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child: Column(crossAxisAlignment: CrossAxisAlignment.start, mainAxisSize: MainAxisSize.min, children: [
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if (note.title.isNotEmpty) Text(note.title, maxLines: 2, overflow: TextOverflow.ellipsis,
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style: TextStyle(fontSize: 13, fontWeight: FontWeight.w600, color: colors.onSurface, height: 1.3)),
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if (contentText.isNotEmpty && contentText != '(无内容)') ...[
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if (note.title.isNotEmpty) const SizedBox(height: 4),
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Text(contentText, maxLines: 2, overflow: TextOverflow.ellipsis,
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style: TextStyle(fontSize: 11, color: colors.onSurface.withValues(alpha: 0.4), height: 1.4)),
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],
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const SizedBox(height: 6),
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Row(children: [
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Expanded(child: Text(_formatTime(note.updatedAt),
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style: TextStyle(fontSize: 10, color: colors.onSurface.withValues(alpha: 0.25)))),
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if (note.tags.isNotEmpty) Container(padding: const EdgeInsets.symmetric(horizontal: 5, vertical: 1),
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decoration: BoxDecoration(color: colors.surfaceContainerHighest, borderRadius: BorderRadius.circular(3)),
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child: Text(note.tags.first, style: TextStyle(fontSize: 10, color: colors.onSurface.withValues(alpha: 0.4))),
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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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);
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}
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String _getPreviewText(Note note) {
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final text = note.content.replaceAll(RegExp(r'[#*\[\]\(\)]'), '').trim();
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return text.isEmpty ? '(无内容)' : text;
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}
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String _formatTime(DateTime date) {
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final diff = DateTime.now().difference(date);
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if (diff.inMinutes < 1) return '刚刚';
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if (diff.inHours < 1) return '${diff.inMinutes}分钟前';
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if (diff.inDays < 1) return '${diff.inHours}小时前';
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if (diff.inDays < 7) return '${diff.inDays}天前';
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return '${date.year}-${date.month.toString().padLeft(2, '0')}-${date.day.toString().padLeft(2, '0')}';
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}
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Widget _buildLoadMore() {
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return Padding(padding: const EdgeInsets.symmetric(vertical: 20),
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child: Center(child: _isLoading
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? SizedBox(width: 20, height: 20, child: CircularProgressIndicator(strokeWidth: 2, color: Theme.of(context).colorScheme.primary))
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: Text('没有更多了', style: TextStyle(fontSize: 12, color: Theme.of(context).colorScheme.onSurface.withValues(alpha: 0.3)))),
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);
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}
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void _showDeleteDialog(BuildContext context, Note note) {
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final colors = Theme.of(context).colorScheme;
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showDialog(context: context, builder: (ctx) => AlertDialog(
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backgroundColor: colors.surface, elevation: 0, shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
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title: Text('确认删除', style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600, color: colors.onSurface)),
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content: Text('确定要删除这条笔记吗？删除后可在回收站恢复。',
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style: TextStyle(fontSize: 14, color: colors.onSurface.withValues(alpha: 0.6), height: 1.5)),
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actions: [
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TextButton(onPressed: () => Navigator.pop(ctx), child: Text('取消', style: TextStyle(color: colors.onSurface.withValues(alpha: 0.6)))),
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ElevatedButton(onPressed: () async { await context.read<AppProvider>().removeNote(note.id); Navigator.pop(ctx); _loadFirst(); },
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style: ElevatedButton.styleFrom(backgroundColor: colors.error, foregroundColor: colors.onError, elevation: 0,
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shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)), padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8)),
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child: const Text('删除'),
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),
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],
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actionsPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
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));
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}
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Widget _buildEmptyState(BuildContext context) {
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final colors = Theme.of(context).colorScheme;
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return Center(child: Column(mainAxisAlignment: MainAxisAlignment.center, children: [
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Container(width: 80, height: 80,
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decoration: BoxDecoration(color: colors.surfaceContainerHighest, borderRadius: BorderRadius.circular(20)),
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child: Icon(Icons.note_outlined, size: 40, color: colors.onSurface.withValues(alpha: 0.25))),
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const SizedBox(height: 20),
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Text('暂无笔记', style: TextStyle(fontSize: 16, color: colors.onSurface.withValues(alpha: 0.4))),
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]));
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}
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}
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