426 lines
12 KiB
Dart
426 lines
12 KiB
Dart
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import '../providers/reading_provider.dart';
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import '../models/reading_article.dart';
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import '../widgets/reading_content_widget.dart';
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import '../widgets/reading_toolbar.dart';
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import 'reading_exercise_screen.dart';
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/// 阅读文章详情页面
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class ReadingArticleScreen extends StatefulWidget {
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final String articleId;
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const ReadingArticleScreen({
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super.key,
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required this.articleId,
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});
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@override
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State<ReadingArticleScreen> createState() => _ReadingArticleScreenState();
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}
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class _ReadingArticleScreenState extends State<ReadingArticleScreen> {
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final ScrollController _scrollController = ScrollController();
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bool _isReading = false;
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DateTime? _startTime;
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@override
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void initState() {
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super.initState();
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_loadArticle();
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_startReading();
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}
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@override
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void dispose() {
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_endReading();
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_scrollController.dispose();
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super.dispose();
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}
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void _loadArticle() {
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final provider = context.read<ReadingProvider>();
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provider.loadArticle(widget.articleId);
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}
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void _startReading() {
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_startTime = DateTime.now();
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_isReading = true;
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}
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void _endReading() {
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if (_isReading && _startTime != null) {
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final duration = DateTime.now().difference(_startTime!);
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final provider = context.read<ReadingProvider>();
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provider.recordReadingProgress(
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articleId: widget.articleId,
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readingTime: duration.inSeconds,
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completed: true,
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);
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_isReading = false;
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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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return Scaffold(
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backgroundColor: Colors.white,
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appBar: AppBar(
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title: const Text(
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'阅读文章',
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style: TextStyle(
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fontWeight: FontWeight.bold,
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color: Colors.white,
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),
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),
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backgroundColor: const Color(0xFF2196F3),
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elevation: 0,
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iconTheme: const IconThemeData(color: Colors.white),
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actions: [
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Consumer<ReadingProvider>(
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builder: (context, provider, child) {
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final article = provider.currentArticle;
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if (article == null) return const SizedBox.shrink();
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return IconButton(
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icon: Icon(
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Icons.favorite,
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color: provider.favoriteArticles.any((a) => a.id == article.id)
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? Colors.red
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: Colors.white,
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),
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onPressed: () => _toggleFavorite(article),
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);
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},
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),
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IconButton(
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icon: const Icon(Icons.share, color: Colors.white),
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onPressed: _shareArticle,
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),
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],
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),
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body: Consumer<ReadingProvider>(
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builder: (context, provider, child) {
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if (provider.isLoading) {
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return const Center(child: CircularProgressIndicator());
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}
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if (provider.error != null) {
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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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Icon(
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Icons.error_outline,
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size: 64,
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color: Colors.grey[400],
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),
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const SizedBox(height: 16),
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Text(
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provider.error!,
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style: TextStyle(color: Colors.grey[600]),
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 16),
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ElevatedButton(
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onPressed: _loadArticle,
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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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final article = provider.currentArticle;
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if (article == null) {
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return const Center(
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child: Text('文章不存在'),
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);
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}
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return Column(
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children: [
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// 文章信息头部
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_buildArticleHeader(article),
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// 阅读工具栏
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const ReadingToolbar(),
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// 文章内容
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Expanded(
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child: ReadingContentWidget(
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article: article,
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scrollController: _scrollController,
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),
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),
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// 底部操作栏
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_buildBottomActions(article),
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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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/// 构建文章信息头部
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Widget _buildArticleHeader(ReadingArticle article) {
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return Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Colors.grey[50],
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border: Border(
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bottom: BorderSide(color: Colors.grey[200]!),
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),
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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// 标题
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Text(
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article.title,
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style: const TextStyle(
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fontSize: 20,
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fontWeight: FontWeight.bold,
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color: Colors.black87,
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),
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),
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const SizedBox(height: 8),
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// 文章信息
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Row(
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children: [
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// 分类标签
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Container(
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padding: const EdgeInsets.symmetric(
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horizontal: 8,
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vertical: 4,
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),
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decoration: BoxDecoration(
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color: const Color(0xFF2196F3).withOpacity(0.1),
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borderRadius: BorderRadius.circular(12),
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),
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child: Text(
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article.categoryLabel,
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style: const TextStyle(
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fontSize: 12,
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color: Color(0xFF2196F3),
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fontWeight: FontWeight.w500,
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),
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),
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),
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const SizedBox(width: 8),
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// 难度标签
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Container(
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padding: const EdgeInsets.symmetric(
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horizontal: 8,
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vertical: 4,
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),
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decoration: BoxDecoration(
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color: _getDifficultyColor(article.difficulty).withOpacity(0.1),
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borderRadius: BorderRadius.circular(12),
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),
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child: Text(
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article.difficultyLabel,
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style: TextStyle(
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fontSize: 12,
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color: _getDifficultyColor(article.difficulty),
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fontWeight: FontWeight.w500,
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),
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),
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),
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const Spacer(),
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// 字数和阅读时间
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Text(
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'${article.wordCount}词 · ${article.readingTime}分钟',
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey[600],
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),
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),
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],
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),
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// 来源和发布时间
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if (article.source != null || article.publishDate != null)
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Padding(
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padding: const EdgeInsets.only(top: 8),
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child: Row(
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children: [
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if (article.source != null) ...[
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Icon(
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Icons.source,
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size: 14,
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color: Colors.grey[500],
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),
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const SizedBox(width: 4),
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Text(
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article.source!,
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey[600],
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),
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),
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],
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if (article.source != null && article.publishDate != null)
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Text(
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' · ',
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey[500],
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),
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),
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if (article.publishDate != null) ...[
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Icon(
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Icons.schedule,
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size: 14,
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color: Colors.grey[500],
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),
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const SizedBox(width: 4),
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Text(
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_formatDate(article.publishDate!),
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey[600],
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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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/// 构建底部操作栏
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Widget _buildBottomActions(ReadingArticle article) {
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return Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Colors.white,
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.05),
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blurRadius: 10,
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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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child: Row(
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children: [
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// 开始练习按钮
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Expanded(
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child: ElevatedButton(
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onPressed: () => _startExercise(article),
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style: ElevatedButton.styleFrom(
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backgroundColor: const Color(0xFF2196F3),
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foregroundColor: Colors.white,
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padding: const EdgeInsets.symmetric(vertical: 12),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(8),
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),
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),
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child: const Text(
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'开始练习',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.w600,
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),
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),
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),
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),
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const SizedBox(width: 12),
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// 重新阅读按钮
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OutlinedButton(
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onPressed: () => _scrollToTop(),
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style: OutlinedButton.styleFrom(
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foregroundColor: const Color(0xFF2196F3),
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side: const BorderSide(color: Color(0xFF2196F3)),
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padding: const EdgeInsets.symmetric(
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horizontal: 16,
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vertical: 12,
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),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(8),
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),
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),
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child: const Text('重新阅读'),
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),
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],
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),
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);
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}
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/// 获取难度颜色
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Color _getDifficultyColor(String difficulty) {
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switch (difficulty.toLowerCase()) {
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case 'a1':
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case 'a2':
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return Colors.green;
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case 'b1':
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case 'b2':
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return Colors.orange;
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case 'c1':
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case 'c2':
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return Colors.red;
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default:
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return Colors.grey;
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}
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}
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/// 格式化日期
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String _formatDate(DateTime date) {
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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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/// 切换收藏状态
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void _toggleFavorite(ReadingArticle article) {
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final provider = context.read<ReadingProvider>();
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final isFavorite = provider.favoriteArticles.any((a) => a.id == article.id);
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if (isFavorite) {
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provider.unfavoriteArticle(article.id);
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('已取消收藏')),
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);
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} else {
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provider.favoriteArticle(article.id);
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('已添加到收藏')),
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);
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}
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}
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/// 分享文章
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void _shareArticle() {
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final article = context.read<ReadingProvider>().currentArticle;
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if (article != null) {
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// TODO: 实现分享功能
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('分享功能开发中...')),
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);
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}
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}
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/// 开始练习
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void _startExercise(ReadingArticle article) {
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Navigator.of(context).push(
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MaterialPageRoute(
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builder: (context) => ReadingExerciseScreen(articleId: article.id),
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),
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);
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}
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/// 滚动到顶部
|
||
|
|
void _scrollToTop() {
|
||
|
|
_scrollController.animateTo(
|
||
|
|
0,
|
||
|
|
duration: const Duration(milliseconds: 500),
|
||
|
|
curve: Curves.easeInOut,
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|