generated from dellevin/template
353 lines
9.6 KiB
Dart
353 lines
9.6 KiB
Dart
import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:path/path.dart' as p;
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import 'md_viewer_page.dart';
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/// Markdown 阅读器 Tab 页 - 文件浏览器
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class MdReaderTabPage extends StatefulWidget {
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const MdReaderTabPage({super.key});
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@override
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State<MdReaderTabPage> createState() => _MdReaderTabPageState();
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}
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class _MdReaderTabPageState extends State<MdReaderTabPage> {
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static const String _basePath = '/storage/emulated/0/Documents/mooknote/markdown';
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String _currentPath = _basePath;
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List<FileSystemEntity> _items = [];
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bool _isLoading = true;
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String? _error;
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@override
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void initState() {
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super.initState();
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_loadDirectory();
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}
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/// 加载当前目录内容
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Future<void> _loadDirectory() async {
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setState(() {
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_isLoading = true;
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_error = null;
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});
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try {
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final dir = Directory(_currentPath);
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if (!await dir.exists()) {
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setState(() {
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_error = '目录不存在\n请将 Markdown 文件放到：\n$_basePath';
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_items = [];
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_isLoading = false;
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});
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return;
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}
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final entities = await dir.list().toList();
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// 排序：文件夹在前，文件在后，按名称排序
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entities.sort((a, b) {
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final aIsDir = a is Directory;
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final bIsDir = b is Directory;
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if (aIsDir != bIsDir) {
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return aIsDir ? -1 : 1;
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}
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return p.basename(a.path).toLowerCase().compareTo(
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p.basename(b.path).toLowerCase());
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});
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setState(() {
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_items = entities;
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_isLoading = false;
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});
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} catch (e) {
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setState(() {
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_error = '读取目录失败: $e';
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_items = [];
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_isLoading = false;
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});
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}
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}
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/// 进入子目录
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void _enterDirectory(String path) {
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setState(() {
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_currentPath = path;
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});
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_loadDirectory();
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}
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/// 返回上级目录
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void _goBack() {
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final parent = Directory(_currentPath).parent.path;
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if (parent == _currentPath) return;
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_enterDirectory(parent);
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}
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/// 打开 Markdown 文件
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void _openFile(String path) {
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Navigator.push(
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context,
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MaterialPageRoute(
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builder: (context) => MdViewerPage(filePath: path),
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),
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);
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}
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/// 判断是否可以返回上级
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bool get _canGoBack => _currentPath != _basePath;
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/// 获取当前显示路径（相对路径）
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String get _displayPath {
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if (_currentPath == _basePath) return 'markdown';
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return _currentPath.substring(_basePath.length + 1);
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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backgroundColor: Colors.white,
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body: Column(
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children: [
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// 紧凑顶部栏
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_buildHeader(),
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// 内容区域
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Expanded(
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child: _buildBody(),
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),
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],
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),
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);
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}
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/// 构建紧凑顶部栏
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Widget _buildHeader() {
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final topPadding = MediaQuery.of(context).padding.top;
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return Container(
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padding: EdgeInsets.only(top: topPadding, left: 12, right: 12, bottom: 8),
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decoration: const BoxDecoration(
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color: Colors.white,
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border: Border(
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bottom: BorderSide(color: Color(0xFFF0F0F0), width: 0.5),
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),
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),
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child: Row(
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children: [
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// 返回按钮
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if (_canGoBack)
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IconButton(
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icon: const Icon(Icons.arrow_back, size: 20),
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padding: EdgeInsets.zero,
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constraints: const BoxConstraints(minWidth: 32, minHeight: 32),
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onPressed: _goBack,
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)
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else
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const SizedBox(width: 8),
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// 路径标题
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Expanded(
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child: Text(
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_canGoBack ? _displayPath : '文件列表',
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style: const TextStyle(
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fontSize: 15,
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fontWeight: FontWeight.w500,
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color: Color(0xFF1A1A1A),
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),
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maxLines: 1,
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overflow: TextOverflow.ellipsis,
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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 _buildBody() {
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if (_isLoading) {
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return const Center(child: CircularProgressIndicator(color: Color(0xFF1A1A1A)));
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}
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if (_error != null) {
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return _buildErrorState();
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}
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if (_items.isEmpty) {
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return _buildEmptyState();
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}
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return RefreshIndicator(
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onRefresh: _loadDirectory,
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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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padding: EdgeInsets.zero,
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itemCount: _items.length,
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itemBuilder: (context, index) {
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final item = _items[index];
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final isDirectory = item is Directory;
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final name = p.basename(item.path);
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final isMdFile = !isDirectory && name.toLowerCase().endsWith('.md');
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// 跳过非 md 文件和非目录项
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if (!isDirectory && !isMdFile) {
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return const SizedBox.shrink();
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}
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return _buildListItem(item, isDirectory, name);
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},
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),
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);
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}
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Widget _buildListItem(FileSystemEntity item, bool isDirectory, String name) {
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return InkWell(
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onTap: () {
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if (isDirectory) {
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_enterDirectory(item.path);
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} else {
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_openFile(item.path);
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}
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},
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child: Container(
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
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decoration: const BoxDecoration(
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border: Border(
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bottom: BorderSide(color: Color(0xFFF0F0F0), width: 0.5),
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),
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),
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child: Row(
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children: [
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Container(
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width: 36,
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height: 36,
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decoration: BoxDecoration(
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color: isDirectory ? const Color(0xFFF0F7FF) : const Color(0xFFF5F5F5),
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borderRadius: BorderRadius.circular(8),
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),
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child: Icon(
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isDirectory ? Icons.folder_outlined : Icons.description_outlined,
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color: isDirectory ? const Color(0xFF4A90D9) : const Color(0xFF666666),
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size: 18,
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),
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),
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const SizedBox(width: 10),
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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name,
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style: const TextStyle(
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fontSize: 14,
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color: Color(0xFF1A1A1A),
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),
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maxLines: 1,
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overflow: TextOverflow.ellipsis,
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),
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if (!isDirectory)
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Text(
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_formatFileSize(item),
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style: const TextStyle(
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fontSize: 11,
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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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if (isDirectory)
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const Icon(Icons.chevron_right, color: Color(0xFFCCCCCC), size: 18)
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else
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const Icon(Icons.open_in_new_outlined, color: Color(0xFFCCCCCC), size: 16),
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],
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),
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),
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);
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}
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/// 格式化文件大小
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String _formatFileSize(FileSystemEntity entity) {
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try {
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if (entity is File) {
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final stat = entity.statSync();
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final size = stat.size;
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if (size < 1024) return '$size B';
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if (size < 1024 * 1024) return '${(size / 1024).toStringAsFixed(1)} KB';
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return '${(size / (1024 * 1024)).toStringAsFixed(1)} MB';
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}
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} catch (_) {}
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return '';
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}
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Widget _buildEmptyState() {
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return const Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(
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Icons.folder_open_outlined,
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size: 64,
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color: Color(0xFFE0E0E0),
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),
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SizedBox(height: 20),
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Text(
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'暂无 Markdown 文件',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.w500,
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color: Color(0xFF999999),
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),
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),
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SizedBox(height: 8),
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Padding(
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padding: EdgeInsets.symmetric(horizontal: 40),
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child: Text(
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'请在 /Documents/mooknote/markdown 目录下放置 .md 文件',
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style: TextStyle(
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fontSize: 13,
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color: Color(0xFFCCCCCC),
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),
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textAlign: TextAlign.center,
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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 _buildErrorState() {
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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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const Icon(
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Icons.error_outline,
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size: 48,
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color: Color(0xFFCCCCCC),
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),
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const SizedBox(height: 16),
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 40),
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child: Text(
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_error!,
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style: const TextStyle(
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fontSize: 14,
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color: Color(0xFF999999),
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),
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textAlign: TextAlign.center,
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),
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),
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const SizedBox(height: 24),
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ElevatedButton(
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onPressed: _loadDirectory,
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style: ElevatedButton.styleFrom(
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backgroundColor: const Color(0xFF1A1A1A),
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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: 24, vertical: 12),
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),
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child: const Text('重试'),
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),
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],
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),
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);
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}
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} |