import 'package:flutter/material.dart';
class WebScraper6Page extends StatefulWidget {
const WebScraper6Page({super.key});
@override
State<WebScraper6Page> createState() => _WebScraper6PageState();
}
class _WebScraper6PageState extends State<WebScraper6Page> {
String _statusOutput = "等待 Http/HTML 树环境初始化...";
bool _isEngineReady = false;
@override
void initState() {
super.initState();
_initEngine();
}
Future<void> _initEngine() async {
setState(() {
_statusOutput = "[系统日志] 正在沙箱环境初始化无头浏览器选择器解析引擎...\n";
});
await Future.delayed(const Duration(milliseconds: 700));
setState(() {
_statusOutput += "WebScraper 采集挂载就绪\n包装映射：web_scraper (DOM & CSS Engine)\n底层数据抓取代理节点处于激活状态";
_isEngineReady = true;
});
}
void _executeDemo() {
if (!_isEngineReady) return;
setState(() {
_statusOutput = "====== 网页抓取采集引擎运行轨迹 ======\n[系统] 侦测到泛内容接口请求下行，开始解析原始 HTML\n[模块] 正在部署全生命周期 Virtual DOM 获取结构点\n";
});
Future.delayed(const Duration(milliseconds: 600), () {
if (!mounted) return;
setState(() {
_statusOutput += "[拦截] 发现海量残块广告标记，采用 CSS 选择器 '.content > div.item' 精确剥离提取\n";
_statusOutput += "[反馈] 成功下潜 50MB 网页文档进行快速数据洗炼，极致提取所需要素文本。\n";
_statusOutput += "结论：针对鸿蒙系统的万物互联泛信息即时采集表现优异！";
});
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: const Color(0xFF1E1E24),
appBar: AppBar(
title: const Text('构建鸿蒙核心底座：web_scraper', style: TextStyle(color: Colors.white, fontSize: 16)),
backgroundColor: const Color(0xFF15151A),
elevation: 0,
centerTitle: true,
iconTheme: const IconThemeData(color: Colors.white),
),
body: SafeArea(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
const Text('🎯 当前演示异构信息场景：', style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold, color: Colors.blueAccent)),
const SizedBox(height: 8),
Container(
padding: const EdgeInsets.all(12),
decoration: BoxDecoration(
color: Colors.blue.withOpacity(0.05),
borderRadius: BorderRadius.circular(8),
border: Border.all(color: Colors.blue.withOpacity(0.2)),
),
child: const Text('精通跨端选择器表达式无头浏览器代理、极限提取残缺数据接口实现连通', style: TextStyle(fontSize: 13, color: Colors.blueGrey, height: 1.5)),
),
const SizedBox(height: 24),
const Text('💻 CSS 解析指令状态与底层剥离输出：', style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold, color: Colors.blueAccent)),
const SizedBox(height: 8),
Expanded(
child: Container(
padding: const EdgeInsets.all(16),
decoration: BoxDecoration(
color: Colors.black54,
borderRadius: BorderRadius.circular(12),
border: Border.all(color: Colors.blueAccent.withOpacity(0.2)),
boxShadow: [BoxShadow(color: Colors.blueAccent.withOpacity(0.05), blurRadius: 20, offset: const Offset(0, 10))],
),
child: SingleChildScrollView(
child: Text(_statusOutput, style: const TextStyle(fontFamily: 'Courier', fontSize: 13, color: Color(0xFF63B3ED), height: 1.8)),
),
),
),
const SizedBox(height: 24),
ElevatedButton.icon(
onPressed: _isEngineReady ? _executeDemo : null,
icon: const Icon(Icons.webhook_rounded, color: Colors.white),
label: const Text('唤起 WebScraper 数据采集器模拟引擎', style: TextStyle(fontSize: 16, color: Colors.white, fontWeight: FontWeight.bold)),
style: ElevatedButton.styleFrom(
backgroundColor: const Color(0xFF2B6CB0),
disabledBackgroundColor: Colors.blue.withOpacity(0.3),
padding: const EdgeInsets.symmetric(vertical: 18),
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
elevation: 8,
),
),
],
),
),
),
);
}
}
