generated from dellevin/template
443 lines
15 KiB
Dart
443 lines
15 KiB
Dart
import 'dart:io';
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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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/// 笔记标签页
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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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static const int _pageSize = 50;
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final List<Note> _displayedNotes = [];
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bool _isLoading = false;
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bool _hasMore = true;
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final ScrollController _scrollController = ScrollController();
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int _layoutStyle = 0; // 0: 列表, 1: 瀑布流
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@override
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void initState() {
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super.initState();
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_scrollController.addListener(_onScroll);
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_layoutStyle = UserPrefs().noteLayoutStyle;
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WidgetsBinding.instance.addPostFrameCallback((_) {
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_loadMoreNotes();
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});
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}
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int _lastNotesCount = 0;
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@override
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void didChangeDependencies() {
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super.didChangeDependencies();
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final provider = context.watch<AppProvider>();
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final allNotes = provider.notes;
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if (allNotes.length != _lastNotesCount && _displayedNotes.isNotEmpty) {
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_lastNotesCount = allNotes.length;
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setState(() {
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_displayedNotes.clear();
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_hasMore = true;
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});
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Future.microtask(() => _loadMoreNotes());
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} else {
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_lastNotesCount = allNotes.length;
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}
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}
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@override
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void dispose() {
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_scrollController.dispose();
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super.dispose();
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}
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void _onScroll() {
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if (_scrollController.position.pixels >=
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_scrollController.position.maxScrollExtent - 200) {
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_loadMoreNotes();
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}
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}
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Future<void> _loadMoreNotes() async {
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if (_isLoading || !_hasMore) return;
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setState(() => _isLoading = true);
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await Future.microtask(() {
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final provider = context.read<AppProvider>();
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final allNotes = provider.notes;
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final startIndex = _displayedNotes.length;
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final endIndex = (startIndex + _pageSize).clamp(0, allNotes.length);
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if (startIndex >= allNotes.length) {
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_hasMore = false;
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} else {
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final newNotes = allNotes.sublist(startIndex, endIndex);
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_displayedNotes.addAll(newNotes);
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_hasMore = endIndex < allNotes.length;
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}
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});
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if (mounted) {
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setState(() => _isLoading = false);
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}
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}
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Future<void> _refresh() async {
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final provider = context.read<AppProvider>();
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await provider.loadNotes();
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setState(() {
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_displayedNotes.clear();
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_hasMore = true;
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});
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await _loadMoreNotes();
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}
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@override
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Widget build(BuildContext context) {
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return Column(
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children: [
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// 笔记内容
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Expanded(
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child: Consumer<AppProvider>(
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builder: (context, provider, child) {
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final allNotes = provider.notes;
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_syncDisplayedNotes(allNotes);
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if (allNotes.isEmpty && _displayedNotes.isEmpty) {
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return _buildEmptyState(context);
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}
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if (_layoutStyle == 1) {
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return _buildWaterfallView();
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}
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return _buildListView();
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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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// ─── 列表视图 ────────────────────────────────────────────────────────
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Widget _buildListView() {
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return RefreshIndicator(
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onRefresh: _refresh,
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color: const Color(0xFF1A1A1A),
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backgroundColor: Colors.white,
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child: ListView.builder(
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controller: _scrollController,
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padding: const EdgeInsets.fromLTRB(12, 10, 12, 100),
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itemCount: _displayedNotes.length + (_hasMore ? 1 : 0),
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itemBuilder: (context, index) {
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if (index >= _displayedNotes.length) {
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return const Padding(
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padding: EdgeInsets.symmetric(vertical: 16),
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child: Center(
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child: SizedBox(
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width: 20, height: 20,
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child: CircularProgressIndicator(strokeWidth: 2, color: Color(0xFF1A1A1A)),
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),
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),
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);
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}
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return NoteListItem(note: _displayedNotes[index]);
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},
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),
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);
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}
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// ─── 瀑布流视图 ──────────────────────────────────────────────────────
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Widget _buildWaterfallView() {
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// 分为左右两列
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final leftItems = <Note>[];
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final rightItems = <Note>[];
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for (int i = 0; i < _displayedNotes.length; i++) {
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if (i % 2 == 0) {
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leftItems.add(_displayedNotes[i]);
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} else {
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rightItems.add(_displayedNotes[i]);
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}
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}
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return RefreshIndicator(
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onRefresh: _refresh,
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color: const Color(0xFF1A1A1A),
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backgroundColor: Colors.white,
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child: SingleChildScrollView(
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controller: _scrollController,
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padding: const EdgeInsets.fromLTRB(12, 8, 12, 100),
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child: Row(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Expanded(child: Column(children: leftItems.map((n) => _buildWaterfallCard(n)).toList())),
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const SizedBox(width: 8),
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Expanded(child: Column(children: rightItems.map((n) => _buildWaterfallCard(n)).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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Widget _buildWaterfallCard(Note note) {
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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: () {
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Navigator.pushNamed(context, '/note-detail', arguments: note).then((_) async {
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await context.read<AppProvider>().loadNotes();
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});
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},
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onLongPress: () => _showDeleteDialog(context, note),
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child: Container(
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margin: const EdgeInsets.only(bottom: 8),
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(10),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withValues(alpha: 0.04),
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blurRadius: 6,
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offset: const Offset(0, 2),
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),
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],
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),
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clipBehavior: Clip.antiAlias,
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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mainAxisSize: MainAxisSize.min,
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children: [
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// 顶部图片
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if (hasImage)
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Stack(
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children: [
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ClipRRect(
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borderRadius: const BorderRadius.vertical(top: Radius.circular(10)),
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child: Image.file(
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File(images.first),
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width: double.infinity,
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fit: BoxFit.cover,
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errorBuilder: (_, __, ___) => const SizedBox.shrink(),
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),
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),
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if (extraCount > 0)
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Positioned(
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top: 6,
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right: 6,
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child: Container(
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padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
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decoration: BoxDecoration(
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color: Colors.black.withValues(alpha: 0.45),
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borderRadius: BorderRadius.circular(10),
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),
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child: Text(
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'+$extraCount',
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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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],
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),
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// 底部文字区域
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Padding(
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padding: const EdgeInsets.fromLTRB(10, 8, 10, 10),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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mainAxisSize: MainAxisSize.min,
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children: [
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if (note.title.isNotEmpty)
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Text(
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note.title,
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maxLines: 2,
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overflow: TextOverflow.ellipsis,
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style: const TextStyle(
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fontSize: 13,
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fontWeight: FontWeight.w600,
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color: Color(0xFF1A1A1A),
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height: 1.3,
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),
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),
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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(
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contentText,
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maxLines: 2,
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overflow: TextOverflow.ellipsis,
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style: const TextStyle(
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fontSize: 11,
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color: Color(0xFF999999),
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height: 1.4,
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),
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),
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],
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const SizedBox(height: 6),
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Row(
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children: [
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Expanded(
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child: Text(
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_formatTime(note.updatedAt),
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style: const TextStyle(fontSize: 10, color: Color(0xFFCCCCCC)),
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),
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),
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if (note.tags.isNotEmpty)
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Container(
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padding: const EdgeInsets.symmetric(horizontal: 5, vertical: 1),
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decoration: BoxDecoration(
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color: const Color(0xFFF5F5F5),
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borderRadius: BorderRadius.circular(3),
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),
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child: Text(
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note.tags.first,
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style: const TextStyle(fontSize: 10, color: Color(0xFF999999)),
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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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),
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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
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.replaceAll(RegExp(r'#'), '')
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.replaceAll(RegExp(r'\*'), '')
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.replaceAll(RegExp(r'`'), '')
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.replaceAll(RegExp(r'[\[\]\(\)]'), '')
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.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 now = DateTime.now();
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final diff = 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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void _showDeleteDialog(BuildContext context, Note note) {
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showDialog(
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context: context,
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builder: (context) => AlertDialog(
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backgroundColor: Colors.white,
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elevation: 0,
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shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
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title: const Text('确认删除', style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600)),
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content: const 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: Color(0xFF666666), height: 1.5)),
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actions: [
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TextButton(
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onPressed: () => Navigator.pop(context),
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style: TextButton.styleFrom(
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foregroundColor: const Color(0xFF666666),
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
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),
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child: const Text('取消'),
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),
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ElevatedButton(
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onPressed: () async {
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await context.read<AppProvider>().removeNote(note.id);
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Navigator.pop(context);
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},
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style: ElevatedButton.styleFrom(
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backgroundColor: Colors.red,
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foregroundColor: Colors.white,
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elevation: 0,
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shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
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),
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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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}
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// ─── 数据同步 ────────────────────────────────────────────────────────
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void _syncDisplayedNotes(List<Note> allNotes) {
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final validNoteIds = allNotes.map((n) => n.id).toSet();
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final initialLength = _displayedNotes.length;
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_displayedNotes.removeWhere((note) => !validNoteIds.contains(note.id));
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final displayedIds = _displayedNotes.map((n) => n.id).toSet();
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final hasNewNotes = allNotes.any((note) => !displayedIds.contains(note.id));
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bool hasUpdates = false;
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for (int i = 0; i < _displayedNotes.length; i++) {
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final localNote = _displayedNotes[i];
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final providerNote = allNotes.firstWhere((n) => n.id == localNote.id);
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if (localNote.updatedAt != providerNote.updatedAt) {
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hasUpdates = true;
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break;
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}
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}
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if (_displayedNotes.length < initialLength || hasNewNotes || hasUpdates) {
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_displayedNotes.clear();
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_displayedNotes.addAll(allNotes);
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_hasMore = false;
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}
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}
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// ─── 空状态 ──────────────────────────────────────────────────────────
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Widget _buildEmptyState(BuildContext context) {
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Container(
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width: 80, height: 80,
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decoration: BoxDecoration(
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color: const Color(0xFFF5F5F5),
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borderRadius: BorderRadius.circular(20),
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),
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child: const Icon(Icons.note_outlined, size: 40, color: Color(0xFFCCCCCC)),
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),
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const SizedBox(height: 20),
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const Text('暂无笔记', style: TextStyle(fontSize: 16, color: Color(0xFF999999))),
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const SizedBox(height: 24),
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InkWell(
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onTap: () => Navigator.pushNamed(context, '/note-form'),
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child: Container(
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padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
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decoration: BoxDecoration(
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color: const Color(0xFF1A1A1A),
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borderRadius: BorderRadius.circular(8),
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),
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child: const Text('添加记录',
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style: TextStyle(fontSize: 14, fontWeight: FontWeight.w500, color: Colors.white)),
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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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