二次开发源码提交
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import 'package:cloudreve4_flutter/presentation/widgets/code_wrapper.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter_highlight/themes/a11y-light.dart';
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import 'package:flutter_highlight/themes/atom-one-dark.dart';
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import 'package:http/http.dart' as http;
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import 'package:markdown_widget/config/configs.dart';
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import 'package:markdown_widget/config/toc.dart';
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import 'package:markdown_widget/widget/blocks/leaf/code_block.dart';
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import 'package:markdown_widget/widget/blocks/leaf/link.dart';
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import 'package:markdown_widget/widget/markdown.dart';
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import 'package:url_launcher/url_launcher.dart';
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import '../../../data/models/file_model.dart';
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import '../../../services/file_service.dart';
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class MarkdownPreviewPage extends StatefulWidget {
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final FileModel file;
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final String? entityId;
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const MarkdownPreviewPage({super.key, required this.file, this.entityId});
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@override
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State<MarkdownPreviewPage> createState() => _MarkdownPreviewPageState();
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}
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class _MarkdownPreviewPageState extends State<MarkdownPreviewPage> {
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String _content = '';
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bool _isLoading = true;
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String? _error;
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final ScrollController _scrollController = ScrollController();
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final _tocController = TocController();
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bool _isDarkMode = false;
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// 控制目录是否显示
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bool _isTocVisible = false;
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// 标记是否已经根据屏幕宽度进行了初始化
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bool _hasInitializedLayout = false;
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@override
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void initState() {
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super.initState();
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_loadFileContent();
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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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_tocController.dispose();
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super.dispose();
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}
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Future<void> _loadFileContent() async {
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try {
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final response = await FileService().getDownloadUrls(
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uris: [widget.file.relativePath],
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download: true,
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entity: widget.entityId,
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);
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final urls = response['urls'] as List<dynamic>? ?? [];
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if (urls.isEmpty) throw Exception('获取URL为空');
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final urlData = urls[0] as Map<String, dynamic>;
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final url = urlData['url'] as String;
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final responseContent = await http.get(Uri.parse(url));
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if (responseContent.statusCode != 200) {
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throw Exception('下载文件失败: ${responseContent.statusCode}');
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}
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if (mounted) {
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setState(() {
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_content = responseContent.body;
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_isLoading = false;
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});
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}
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} catch (e) {
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if (mounted) {
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setState(() {
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_error = e.toString();
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_isLoading = false;
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});
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}
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}
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}
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@override
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Widget build(BuildContext context) {
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final double screenWidth = MediaQuery.of(context).size.width;
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final bool isWideScreen = screenWidth >= 1000;
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// 首次加载时，根据屏幕宽度决定目录默认状态
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if (!_hasInitializedLayout && !_isLoading) {
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_isTocVisible = isWideScreen;
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_hasInitializedLayout = true;
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}
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final isDark = _isDarkMode;
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final bgColor = isDark ? const Color(0xFF1E1E1E) : Colors.white;
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return Scaffold(
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backgroundColor: bgColor,
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appBar: AppBar(
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backgroundColor: bgColor,
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elevation: 0,
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leading: IconButton(
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icon: Icon(Icons.arrow_back, color: isDark ? Colors.white : Colors.black87),
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onPressed: () => Navigator.of(context).pop(),
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),
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title: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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widget.file.name,
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style: TextStyle(
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color: isDark ? Colors.white : Colors.black87,
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fontSize: 16,
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fontWeight: FontWeight.w500,
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),
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overflow: TextOverflow.ellipsis,
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),
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if (!_isLoading && _error == null)
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Text('Markdown 预览', style: TextStyle(color: Colors.grey, fontSize: 12)),
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],
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),
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actions: [
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if (!_isLoading && _error == null)
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IconButton(
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icon: Icon(Icons.copy, color: isDark ? Colors.white : Colors.black87),
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onPressed: () => Clipboard.setData(ClipboardData(text: _content)),
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),
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],
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),
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body: _isLoading
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? const Center(child: CircularProgressIndicator())
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: _error != null
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? _buildErrorWidget()
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: _buildResponsiveBody(isWideScreen, screenWidth),
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floatingActionButton: _buildFAB(isDark),
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);
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}
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// 构建响应式主体
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Widget _buildResponsiveBody(bool isWideScreen, double screenWidth) {
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final double tocWidth = isWideScreen ? 300 : screenWidth * 0.7;
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// 预定义暗色/亮色下的文字颜色
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final Color textColor = _isDarkMode ? Colors.white : Colors.black87;
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final Color subTextColor = _isDarkMode ? Colors.white70 : Colors.black54;
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return Row(
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children: [
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// 1. 侧边目录区
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AnimatedContainer(
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duration: const Duration(milliseconds: 300),
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curve: Curves.easeInOut,
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width: _isTocVisible ? tocWidth : 0,
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child: Container(
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decoration: BoxDecoration(
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border: Border(
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right: BorderSide(
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color: _isDarkMode ? Colors.white10 : Colors.grey.withValues(alpha: 0.2)
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),
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),
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color: _isDarkMode ? const Color(0xFF252525) : Colors.grey.shade50,
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),
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child: ClipRect(
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child: Column(
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children: [
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Padding(
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padding: const EdgeInsets.fromLTRB(16, 16, 16, 8),
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child: Text(
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"目录",
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style: TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.bold,
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color: textColor, // 适配标题颜色
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),
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),
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),
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Divider(height: 1, color: _isDarkMode ? Colors.white10 : Colors.grey.shade300),
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Expanded(
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child: GestureDetector(
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onTap: () {
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if (!isWideScreen) {
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Future.delayed(const Duration(milliseconds: 200), () {
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if (mounted) setState(() => _isTocVisible = false);
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});
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}
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},
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behavior: HitTestBehavior.translucent,
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// 使用 Theme 局部包裹，强制改变 TOC 内部的 TextTheme
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child: Theme(
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data: Theme.of(context).copyWith(
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textTheme: TextTheme(
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// 某些版本的 markdown_widget 会引用 bodyMedium 或 bodySmall
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bodyMedium: TextStyle(color: subTextColor),
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bodySmall: TextStyle(color: subTextColor),
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),
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),
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child: TocWidget(
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controller: _tocController,
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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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// 2. 正文内容区
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Expanded(
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child: Container(
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color: _isDarkMode ? const Color(0xFF1E1E1E) : Colors.white,
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child: SafeArea(
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left: false,
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right: true,
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child: Padding(
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padding: const EdgeInsets.symmetric(horizontal: 16.0), // 增加一点边距
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child: _buildMarkdownWidget(_content),
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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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Widget _buildMarkdownWidget(String content) {
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final config = _isDarkMode ? MarkdownConfig.darkConfig : MarkdownConfig.defaultConfig;
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CodeWrapperWidget codeWrapper(child, text, language) => CodeWrapperWidget(child, text, language);
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return MarkdownWidget(
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data: content,
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tocController: _tocController,
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config: config.copy(
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configs: [
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_isDarkMode
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? PreConfig.darkConfig.copy(theme: a11yLightTheme, wrapper: codeWrapper)
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: PreConfig(theme: atomOneDarkTheme).copy(wrapper: codeWrapper),
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LinkConfig(
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style: TextStyle(
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color: _isDarkMode ? Colors.lightBlue : Colors.blue,
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decoration: TextDecoration.underline,
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),
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onTap: (url) => launchUrl(Uri.parse(url)),
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),
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],
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),
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selectable: true,
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);
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}
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Widget _buildErrorWidget() {
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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(Icons.error_outline, size: 64, color: Colors.red),
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const SizedBox(height: 16),
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Text(_error!),
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ElevatedButton(onPressed: _loadFileContent, 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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Widget _buildFAB(bool isDark) {
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if (_isLoading || _error != null) return const SizedBox.shrink();
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// 定义统一的按钮背景颜色，增加视觉一致性
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final Color activeColor = isDark ? Colors.blue.shade700 : Colors.blue;
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final Color inactiveColor = isDark ? Colors.grey.shade800 : Colors.grey.shade200;
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final Color iconColor = isDark ? Colors.white : Colors.black87;
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return Column(
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mainAxisAlignment: MainAxisAlignment.end,
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children: [
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// 1. 暗色模式切换按钮
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FloatingActionButton(
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heroTag: 'theme_toggle',
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mini: true, // 保持 mini
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backgroundColor: inactiveColor,
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elevation: 2, // 稍微降低阴影，看起来更精致
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onPressed: () => setState(() => _isDarkMode = !_isDarkMode),
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child: Icon(
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isDark ? Icons.light_mode : Icons.dark_mode,
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color: iconColor,
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size: 20, // 微调图标大小
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),
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),
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const SizedBox(height: 12),
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// 2. 目录切换按钮
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FloatingActionButton(
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heroTag: 'toc_toggle',
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mini: true, // 这里修改为 true，使其与上面的按钮大小一致
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// 如果目录开启，使用蓝色背景，否则使用普通背景
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backgroundColor: _isTocVisible ? activeColor : inactiveColor,
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elevation: 2,
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onPressed: () => setState(() => _isTocVisible = !_isTocVisible),
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child: Icon(
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Icons.format_list_bulleted,
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color: _isTocVisible ? Colors.white : iconColor,
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size: 20,
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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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