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md阅读器+

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DelLevin-Home
2026-05-22 15:27:39 +08:00
parent 6b5488aff8
commit 79f813c463
11 changed files with 1879 additions and 1414 deletions
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724
lib/pages/markdown_reader/md_reader_tab_page.dart
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@@ -1,9 +1,12 @@
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:file_picker/file_picker.dart';
import 'package:path/path.dart' as p;
import 'package:permission_handler/permission_handler.dart';
import '../../utils/user_prefs.dart';
import 'md_viewer_page.dart';
/// Markdown 阅读器 Tab 页 - 文件浏览器
/// Markdown 阅读器 - 文件浏览器
class MdReaderTabPage extends StatefulWidget {
const MdReaderTabPage({super.key});
@@ -12,342 +15,543 @@ class MdReaderTabPage extends StatefulWidget {
}
class _MdReaderTabPageState extends State<MdReaderTabPage> {
static const String _basePath = '/storage/emulated/0/Documents/mooknote/markdown';
String _currentPath = _basePath;
List<FileSystemEntity> _items = [];
bool _isLoading = true;
String? _rootPath;
String? _currentPath;
List<_FileEntry> _entries = [];
bool _isLoading = false;
String? _error;
bool _showEmptyDirs = true;
bool _showImageOnlyDirs = true;
@override
void initState() {
super.initState();
_loadDirectory();
_loadSettings();
_init();
}
/// 加载当前目录内容
Future<void> _loadDirectory() async {
setState(() {
_isLoading = true;
_error = null;
});
void _loadSettings() {
final prefs = UserPrefs();
_showEmptyDirs = prefs.showEmptyDirs;
_showImageOnlyDirs = prefs.showImageOnlyDirs;
}
try {
final dir = Directory(_currentPath);
if (!await dir.exists()) {
setState(() {
_error = '目录不存在\n请将 Markdown 文件放到：\n$_basePath';
_items = [];
_isLoading = false;
});
Future<void> _init() async {
final saved = UserPrefs().lastMdFolder;
if (saved != null && saved.isNotEmpty) {
final dir = Directory(saved);
if (await dir.exists()) {
_rootPath = saved;
_currentPath = saved;
await _loadDirectory();
return;
}
final entities = await dir.list().toList();
// 排序：文件夹在前，文件在后，按名称排序
entities.sort((a, b) {
final aIsDir = a is Directory;
final bIsDir = b is Directory;
if (aIsDir != bIsDir) {
return aIsDir ? -1 : 1;
}
return p.basename(a.path).toLowerCase().compareTo(
p.basename(b.path).toLowerCase());
});
setState(() {
_items = entities;
_isLoading = false;
});
} catch (e) {
setState(() {
_error = '读取目录失败: $e';
_items = [];
_isLoading = false;
});
}
if (mounted) setState(() {});
}
/// 进入子目录
void _enterDirectory(String path) {
setState(() {
_currentPath = path;
});
_loadDirectory();
/// 请求存储权限（Android 11+ 需要 MANAGE_EXTERNAL_STORAGE）
Future<bool> _requestStoragePermission() async {
if (!Platform.isAndroid) return true;
var status = await Permission.manageExternalStorage.status;
if (status.isGranted) return true;
status = await Permission.manageExternalStorage.request();
if (status.isGranted) return true;
status = await Permission.storage.status;
if (status.isGranted) return true;
status = await Permission.storage.request();
return status.isGranted;
}
/// 返回上级目录
void _goBack() {
final parent = Directory(_currentPath).parent.path;
if (parent == _currentPath) return;
_enterDirectory(parent);
Future<void> _pickDirectory() async {
final hasPermission = await _requestStoragePermission();
if (!hasPermission) {
if (mounted) {
_showPermissionDeniedDialog();
}
return;
}
final result = await FilePicker.platform.getDirectoryPath();
if (result == null) return;
UserPrefs().setLastMdFolder(result);
_rootPath = result;
_currentPath = result;
_error = null;
await _loadDirectory();
}
/// 打开 Markdown 文件
void _openFile(String path) {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => MdViewerPage(filePath: path),
void _showPermissionDeniedDialog() {
showDialog(
context: context,
builder: (ctx) => AlertDialog(
title: const Text('需要存储权限', style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600)),
content: const Text(
'Android 11+ 需要在系统设置中授予"所有文件访问权限"才能读取目录中的 Markdown 文件。\n\n是否前往设置？',
style: TextStyle(fontSize: 14, color: Color(0xFF666666), height: 1.6),
),
actions: [
TextButton(
onPressed: () => Navigator.pop(ctx),
child: const Text('取消', style: TextStyle(color: Color(0xFF999999))),
),
TextButton(
onPressed: () {
Navigator.pop(ctx);
openAppSettings();
},
child: const Text('前往设置', style: TextStyle(color: Color(0xFF1A1A1A))),
),
],
),
);
}
/// 判断是否可以返回上级
bool get _canGoBack => _currentPath != _basePath;
/// 获取当前显示路径（相对路径）
String get _displayPath {
if (_currentPath == _basePath) return 'markdown';
return _currentPath.substring(_basePath.length + 1);
/// 递归检查目录（含子目录）是否包含 Markdown 文件
bool _hasMarkdownFiles(String dirPath) {
try {
final dir = Directory(dirPath);
if (!dir.existsSync()) return false;
for (final entity in dir.listSync(recursive: true, followLinks: false)) {
if (entity is File) {
final lower = p.basename(entity.path).toLowerCase();
if (lower.endsWith('.md') || lower.endsWith('.markdown') || lower.endsWith('.mdown') || lower.endsWith('.txt')) {
return true;
}
}
}
} catch (_) {}
return false;
}
/// 递归检查目录是否只有图片文件（无 markdown、无非图片文件）
bool _isImageOnlyDir(String dirPath) {
try {
final dir = Directory(dirPath);
if (!dir.existsSync()) return false;
const imageExts = ['.png', '.jpg', '.jpeg', '.gif', '.webp', '.bmp', '.svg', '.ico', '.tiff', '.heic', '.webm'];
bool hasAnyFile = false;
for (final entity in dir.listSync(recursive: true, followLinks: false)) {
if (entity is File) {
hasAnyFile = true;
final lower = p.basename(entity.path).toLowerCase();
if (lower.endsWith('.md') || lower.endsWith('.markdown') || lower.endsWith('.mdown') || lower.endsWith('.txt')) {
return false;
}
if (!imageExts.any((ext) => lower.endsWith(ext))) {
return false;
}
}
}
return hasAnyFile;
} catch (_) {}
return false;
}
/// 判断目录是否应该被过滤掉
bool _shouldFilterDir(String dirPath) {
if (!_showEmptyDirs && !_hasMarkdownFiles(dirPath)) return true;
if (!_showImageOnlyDirs && _isImageOnlyDir(dirPath)) return true;
return false;
}
Future<void> _loadDirectory() async {
if (_currentPath == null) return;
setState(() {
_isLoading = true;
_error = null;
_entries = [];
});
try {
final dir = Directory(_currentPath!);
final exists = await dir.exists();
if (!exists) {
if (mounted) {
setState(() {
_error = '目录不存在: $_currentPath';
_isLoading = false;
});
}
return;
}
final list = dir.listSync(recursive: false, followLinks: false);
final entries = <_FileEntry>[];
for (final entity in list) {
final name = p.basename(entity.path);
if (entity is Directory) {
if (!_shouldFilterDir(entity.path)) {
entries.add(_FileEntry(name: name, path: entity.path, isDir: true));
}
} else if (entity is File) {
final lower = name.toLowerCase();
if (lower.endsWith('.md') || lower.endsWith('.markdown') || lower.endsWith('.mdown') || lower.endsWith('.txt')) {
final stat = entity.statSync();
entries.add(_FileEntry(name: name, path: entity.path, isDir: false, size: stat.size));
}
}
}
entries.sort((a, b) {
if (a.isDir != b.isDir) return a.isDir ? -1 : 1;
return a.name.toLowerCase().compareTo(b.name.toLowerCase());
});
if (mounted) {
setState(() {
_entries = entries;
_isLoading = false;
});
}
} catch (e) {
if (mounted) {
setState(() {
_error = '读取失败: $e';
_isLoading = false;
});
}
}
}
void _enterDirectory(String path) {
_currentPath = path;
_loadDirectory();
}
void _goBack() {
if (_currentPath == null || _rootPath == null || _currentPath == _rootPath) return;
final parent = Directory(_currentPath!).parent.path;
if (parent == _currentPath!) return;
if (!parent.startsWith(_rootPath!)) return;
_currentPath = parent;
_loadDirectory();
}
void _openFile(_FileEntry entry) {
Navigator.push(context, MaterialPageRoute(
builder: (context) => MdViewerPage(filePath: entry.path),
));
}
void _showSettingsSheet() {
showModalBottomSheet(
context: context,
backgroundColor: Colors.white,
shape: const RoundedRectangleBorder(
borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
),
builder: (ctx) {
return StatefulBuilder(
builder: (ctx, setLocalState) => Padding(
padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 12),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Container(
width: 36, height: 4,
decoration: BoxDecoration(
color: const Color(0xFFDDDDDD),
borderRadius: BorderRadius.circular(2),
),
),
const SizedBox(height: 20),
const Align(
alignment: Alignment.centerLeft,
child: Text('目录显示设置', style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600, color: Color(0xFF1A1A1A))),
),
const SizedBox(height: 16),
SwitchListTile(
contentPadding: EdgeInsets.zero,
title: const Text('显示空目录', style: TextStyle(fontSize: 14, color: Color(0xFF333333))),
subtitle: const Text('关闭后隐藏无 Markdown 文件的目录', style: TextStyle(fontSize: 12, color: Color(0xFF999999))),
value: _showEmptyDirs,
activeColor: const Color(0xFF1A1A1A),
onChanged: (val) {
setLocalState(() => _showEmptyDirs = val);
UserPrefs().setShowEmptyDirs(val);
setState(() {});
_loadDirectory();
},
),
const Divider(height: 0.5, color: Color(0xFFF0F0F0)),
SwitchListTile(
contentPadding: EdgeInsets.zero,
title: const Text('显示纯图片目录', style: TextStyle(fontSize: 14, color: Color(0xFF333333))),
subtitle: const Text('关闭后隐藏只含图片、无 Markdown 的目录', style: TextStyle(fontSize: 12, color: Color(0xFF999999))),
value: _showImageOnlyDirs,
activeColor: const Color(0xFF1A1A1A),
onChanged: (val) {
setLocalState(() => _showImageOnlyDirs = val);
UserPrefs().setShowImageOnlyDirs(val);
setState(() {});
_loadDirectory();
},
),
const SizedBox(height: 20),
],
),
),
);
},
);
}
bool get _canGoBack => _currentPath != null && _rootPath != null && _currentPath != _rootPath;
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.white,
body: Column(
children: [
// 紧凑顶部栏
_buildHeader(),
// 内容区域
Expanded(
child: _buildBody(),
),
],
),
);
}
/// 构建紧凑顶部栏
Widget _buildHeader() {
final topPadding = MediaQuery.of(context).padding.top;
return Container(
padding: EdgeInsets.only(top: topPadding, left: 12, right: 12, bottom: 8),
decoration: const BoxDecoration(
color: Colors.white,
border: Border(
bottom: BorderSide(color: Color(0xFFF0F0F0), width: 0.5),
appBar: AppBar(
backgroundColor: Colors.white,
elevation: 0,
title: Text(
_currentPath != null ? p.basename(_currentPath!) : 'Markdown 阅读',
style: const TextStyle(fontSize: 17, fontWeight: FontWeight.w600, color: Color(0xFF1A1A1A)),
),
),
child: Row(
children: [
// 返回按钮
leading: IconButton(
icon: const Icon(Icons.arrow_back, color: Color(0xFF1A1A1A)),
onPressed: () => Navigator.pop(context),
),
actions: [
if (_canGoBack)
IconButton(
icon: const Icon(Icons.arrow_back, size: 20),
padding: EdgeInsets.zero,
constraints: const BoxConstraints(minWidth: 32, minHeight: 32),
onPressed: _goBack,
)
else
const SizedBox(width: 8),
// 路径标题
Expanded(
child: Text(
_canGoBack ? _displayPath : '文件列表',
style: const TextStyle(
fontSize: 15,
fontWeight: FontWeight.w500,
color: Color(0xFF1A1A1A),
Padding(
padding: const EdgeInsets.only(right: 8),
child: GestureDetector(
onTap: _goBack,
child: Container(
padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 5),
decoration: BoxDecoration(
color: const Color(0xFFF5F5F5),
borderRadius: BorderRadius.circular(14),
border: Border.all(color: const Color(0xFFE8E8E8), width: 0.5),
),
child: const Text('返回上级', style: TextStyle(fontSize: 12, color: Color(0xFF666666))),
),
),
maxLines: 1,
overflow: TextOverflow.ellipsis,
),
if (_currentPath != null)
Padding(
padding: const EdgeInsets.only(right: 4),
child: GestureDetector(
onTap: _pickDirectory,
child: Container(
padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 5),
decoration: BoxDecoration(
color: const Color(0xFFF5F5F5),
borderRadius: BorderRadius.circular(14),
border: Border.all(color: const Color(0xFFE8E8E8), width: 0.5),
),
child: const Text('更换目录', style: TextStyle(fontSize: 12, color: Color(0xFF888888))),
),
),
),
IconButton(
icon: const Icon(Icons.tune, size: 20, color: Color(0xFF888888)),
onPressed: _showSettingsSheet,
),
const SizedBox(width: 4),
],
),
body: _buildBody(),
);
}
Widget _buildBody() {
if (_currentPath == null) {
return _buildWelcome();
}
if (_isLoading) {
return const Center(child: CircularProgressIndicator(color: Color(0xFF1A1A1A)));
}
if (_error != null) {
return _buildErrorState();
}
if (_items.isEmpty) {
return _buildEmptyState();
return _buildError();
}
return RefreshIndicator(
onRefresh: _loadDirectory,
color: const Color(0xFF1A1A1A),
backgroundColor: Colors.white,
child: ListView.builder(
child: _entries.isEmpty ? _buildEmpty() : ListView.separated(
padding: EdgeInsets.zero,
itemCount: _items.length,
itemCount: (_canGoBack ? 1 : 0) + _entries.length,
separatorBuilder: (_, __) => const Divider(height: 0.5, thickness: 0.5, color: Color(0xFFF0F0F0)),
itemBuilder: (context, index) {
final item = _items[index];
final isDirectory = item is Directory;
final name = p.basename(item.path);
final isMdFile = !isDirectory && name.toLowerCase().endsWith('.md');
// 跳过非 md 文件和非目录项
if (!isDirectory && !isMdFile) {
return const SizedBox.shrink();
if (_canGoBack && index == 0) {
return ListTile(
leading: Container(
width: 36, height: 36,
decoration: BoxDecoration(
color: const Color(0xFFF5F5F5),
borderRadius: BorderRadius.circular(8),
),
child: const Icon(Icons.arrow_upward, size: 18, color: Color(0xFF888888)),
),
title: const Text('..', style: TextStyle(fontSize: 14, color: Color(0xFF888888))),
onTap: _goBack,
);
}
return _buildListItem(item, isDirectory, name);
final entry = _entries[_canGoBack ? index - 1 : index];
return ListTile(
leading: Container(
width: 36, height: 36,
decoration: BoxDecoration(
color: entry.isDir ? const Color(0xFFF0F7FF) : const Color(0xFFF5F5F5),
borderRadius: BorderRadius.circular(8),
),
child: Icon(
entry.isDir ? Icons.folder_outlined : Icons.description_outlined,
size: 18,
color: entry.isDir ? const Color(0xFF4A90D9) : const Color(0xFF666666),
),
),
title: Text(entry.name, style: const TextStyle(fontSize: 14, color: Color(0xFF1A1A1A)), maxLines: 1, overflow: TextOverflow.ellipsis),
subtitle: entry.isDir ? null : Text(_formatSize(entry.size), style: const TextStyle(fontSize: 11, color: Color(0xFF999999))),
trailing: Icon(entry.isDir ? Icons.chevron_right : Icons.open_in_new_outlined, size: 16, color: const Color(0xFFCCCCCC)),
onTap: () => entry.isDir ? _enterDirectory(entry.path) : _openFile(entry),
);
},
),
);
}
Widget _buildListItem(FileSystemEntity item, bool isDirectory, String name) {
return InkWell(
onTap: () {
if (isDirectory) {
_enterDirectory(item.path);
} else {
_openFile(item.path);
}
},
child: Container(
padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
decoration: const BoxDecoration(
border: Border(
bottom: BorderSide(color: Color(0xFFF0F0F0), width: 0.5),
),
),
child: Row(
Widget _buildWelcome() {
return Center(
child: Padding(
padding: const EdgeInsets.all(40),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Container(
width: 36,
height: 36,
width: 80, height: 80,
decoration: BoxDecoration(
color: isDirectory ? const Color(0xFFF0F7FF) : const Color(0xFFF5F5F5),
borderRadius: BorderRadius.circular(8),
color: const Color(0xFFF5F5F5),
borderRadius: BorderRadius.circular(20),
),
child: Icon(
isDirectory ? Icons.folder_outlined : Icons.description_outlined,
color: isDirectory ? const Color(0xFF4A90D9) : const Color(0xFF666666),
size: 18,
child: const Icon(Icons.folder_open_outlined, size: 40, color: Color(0xFFCCCCCC)),
),
const SizedBox(height: 24),
const Text('Markdown 阅读', style: TextStyle(fontSize: 20, fontWeight: FontWeight.w600, color: Color(0xFF1A1A1A))),
const SizedBox(height: 8),
const Text('选择一个包含 .md 文件的文件夹', style: TextStyle(fontSize: 14, color: Color(0xFF999999))),
const SizedBox(height: 32),
GestureDetector(
onTap: _pickDirectory,
child: Container(
padding: const EdgeInsets.symmetric(horizontal: 32, vertical: 14),
decoration: BoxDecoration(
color: const Color(0xFF1A1A1A),
borderRadius: BorderRadius.circular(24),
),
child: const Text('选择目录', style: TextStyle(fontSize: 15, color: Colors.white, fontWeight: FontWeight.w500)),
),
),
const SizedBox(width: 10),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
name,
style: const TextStyle(
fontSize: 14,
color: Color(0xFF1A1A1A),
),
maxLines: 1,
overflow: TextOverflow.ellipsis,
),
if (!isDirectory)
Text(
_formatFileSize(item),
style: const TextStyle(
fontSize: 11,
color: Color(0xFF999999),
),
),
],
),
),
if (isDirectory)
const Icon(Icons.chevron_right, color: Color(0xFFCCCCCC), size: 18)
else
const Icon(Icons.open_in_new_outlined, color: Color(0xFFCCCCCC), size: 16),
],
),
),
);
}
/// 格式化文件大小
String _formatFileSize(FileSystemEntity entity) {
try {
if (entity is File) {
final stat = entity.statSync();
final size = stat.size;
if (size < 1024) return '$size B';
if (size < 1024 * 1024) return '${(size / 1024).toStringAsFixed(1)} KB';
return '${(size / (1024 * 1024)).toStringAsFixed(1)} MB';
}
} catch (_) {}
return '';
}
Widget _buildEmptyState() {
return const Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Icon(
Icons.folder_open_outlined,
size: 64,
color: Color(0xFFE0E0E0),
),
SizedBox(height: 20),
Text(
'暂无 Markdown 文件',
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w500,
color: Color(0xFF999999),
),
),
SizedBox(height: 8),
Padding(
padding: EdgeInsets.symmetric(horizontal: 40),
child: Text(
'请在 /Documents/mooknote/markdown 目录下放置 .md 文件',
style: TextStyle(
fontSize: 13,
color: Color(0xFFCCCCCC),
),
textAlign: TextAlign.center,
),
),
],
),
);
}
Widget _buildErrorState() {
Widget _buildEmpty() {
return Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min,
children: [
const Icon(
Icons.error_outline,
size: 48,
color: Color(0xFFCCCCCC),
),
const Icon(Icons.folder_open_outlined, size: 64, color: Color(0xFFE0E0E0)),
const SizedBox(height: 16),
Padding(
padding: const EdgeInsets.symmetric(horizontal: 40),
child: Text(
_error!,
style: const TextStyle(
fontSize: 14,
color: Color(0xFF999999),
),
textAlign: TextAlign.center,
),
),
const Text('此目录下没有 Markdown 文件', style: TextStyle(fontSize: 15, color: Color(0xFF999999))),
const SizedBox(height: 4),
Text(_currentPath ?? '', style: const TextStyle(fontSize: 12, color: Color(0xFFCCCCCC))),
const SizedBox(height: 24),
ElevatedButton(
onPressed: _loadDirectory,
style: ElevatedButton.styleFrom(
backgroundColor: const Color(0xFF1A1A1A),
foregroundColor: Colors.white,
elevation: 0,
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
GestureDetector(
onTap: _canGoBack ? _goBack : () => _pickDirectory(),
child: Container(
padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 10),
decoration: BoxDecoration(
border: Border.all(color: const Color(0xFFDDDDDD)),
borderRadius: BorderRadius.circular(20),
),
child: Text(
_canGoBack ? '返回上级目录' : '换一个目录',
style: const TextStyle(fontSize: 13, color: Color(0xFF888888)),
),
),
child: const Text('重试'),
),
],
),
);
}
}
Widget _buildError() {
return Center(
child: Padding(
padding: const EdgeInsets.all(40),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
const Icon(Icons.error_outline, size: 48, color: Color(0xFFCCCCCC)),
const SizedBox(height: 16),
Text(_error!, style: const TextStyle(fontSize: 14, color: Color(0xFF999999)), textAlign: TextAlign.center),
const SizedBox(height: 8),
Text('路径: ${_currentPath ?? ""}', style: const TextStyle(fontSize: 12, color: Color(0xFFCCCCCC))),
const SizedBox(height: 24),
Row(
mainAxisSize: MainAxisSize.min,
children: [
GestureDetector(
onTap: _loadDirectory,
child: Container(
padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 10),
decoration: BoxDecoration(
color: const Color(0xFF1A1A1A),
borderRadius: BorderRadius.circular(20),
),
child: const Text('重试', style: TextStyle(fontSize: 13, color: Colors.white)),
),
),
const SizedBox(width: 12),
GestureDetector(
onTap: _pickDirectory,
child: Container(
padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 10),
decoration: BoxDecoration(
border: Border.all(color: const Color(0xFFDDDDDD)),
borderRadius: BorderRadius.circular(20),
),
child: const Text('更换目录', style: TextStyle(fontSize: 13, color: Color(0xFF888888))),
),
),
],
),
],
),
),
);
}
String _formatSize(int? bytes) {
if (bytes == null) return '';
if (bytes < 1024) return '$bytes B';
if (bytes < 1024 * 1024) return '${(bytes / 1024).toStringAsFixed(1)} KB';
return '${(bytes / (1024 * 1024)).toStringAsFixed(1)} MB';
}
}
class _FileEntry {
final String name;
final String path;
final bool isDir;
final int? size;
_FileEntry({required this.name, required this.path, required this.isDir, this.size});
}