using Microsoft.Extensions.Logging;
using AuroraDesk.Presentation.ViewModels.Base;
using ReactiveUI;
using System;
using System.Collections.ObjectModel;
using System.Reactive;
using AvaloniaEdit.Document;
namespace AuroraDesk.Presentation.ViewModels.Pages;
///
/// 代码编辑器页面的 ViewModel
///
public class EditorPageViewModel : RoutableViewModel
{
private string _selectedLanguage = "C#";
private TextDocument _document;
private readonly ILogger? _logger;
public ObservableCollection AvailableLanguages { get; }
public string SelectedLanguage
{
get => _selectedLanguage;
set => this.RaiseAndSetIfChanged(ref _selectedLanguage, value);
}
public TextDocument Document
{
get => _document;
set => this.RaiseAndSetIfChanged(ref _document, value);
}
// 响应式命令
public ReactiveCommand ClearCodeCommand { get; }
public ReactiveCommand FormatCodeCommand { get; }
///
/// 构造函数
///
/// 宿主 Screen
/// 日志记录器
public EditorPageViewModel(IScreen hostScreen, ILogger? logger = null) : base(hostScreen, "Editor")
{
_logger = logger;
// 先初始化 Document，确保绑定时有值
_document = new TextDocument();
AvailableLanguages = new ObservableCollection
{
"C#",
"JavaScript",
"TypeScript",
"HTML",
"CSS",
"JSON",
"XML",
"Python",
"Java",
"SQL"
};
_logger?.LogInformation("EditorPageViewModel 已创建");
// 初始化示例代码
InitializeDefaultCode();
// 创建命令
ClearCodeCommand = ReactiveCommand.Create(ClearCode);
FormatCodeCommand = ReactiveCommand.Create(FormatCode);
// 监听语言选择变化
this.WhenAnyValue(x => x.SelectedLanguage)
.Subscribe(lang =>
{
_logger?.LogInformation("切换语言: {Language}", lang);
UpdateCodeForLanguage(lang);
});
}
private void InitializeDefaultCode()
{
var defaultCode = "// 欢迎使用 AvaloniaEdit.TextMate 代码编辑器\n" +
"// 选择不同的编程语言查看语法高亮效果\n" +
"\n" +
"using System;\n" +
"\n" +
"namespace AuroraDesk\n" +
"{\n" +
" public class Program\n" +
" {\n" +
" public static void Main(string[] args)\n" +
" {\n" +
" Console.WriteLine(\"Hello, AvaloniaEdit!\");\n" +
" }\n" +
" }\n" +
"}";
Document.Text = defaultCode;
}
private void UpdateCodeForLanguage(string language)
{
Document.Text = GetDefaultCode(language);
_logger?.LogInformation("代码已更新为: {Language}", language);
}
private string GetDefaultCode(string language)
{
return language switch
{
"C#" => "using System;\n\nnamespace Example\n{\n public class Demo\n {\n static void Main()\n {\n Console.WriteLine(\"Hello World!\");\n }\n }\n}",
"JavaScript" => "// JavaScript 示例\nfunction greet(name) {\n return `Hello, ${name}!`;\n}\n\nconst person = 'World';\nconsole.log(greet(person));",
"TypeScript" => "// TypeScript 示例\ninterface Person {\n name: string;\n age: number;\n}\n\nconst user: Person = {\n name: 'Alice',\n age: 30\n};\n\nconsole.log(user);",
"HTML" => "\n\n\n 示例\n\n\n Hello World
\n\n",
"CSS" => "/* CSS 示例 */\nbody {\n font-family: Arial, sans-serif;\n margin: 0;\n padding: 20px;\n}\n\n.container {\n max-width: 1200px;\n margin: 0 auto;\n}",
"JSON" => "{\n \"name\": \"MyApp\",\n \"version\": \"1.0.0\",\n \"dependencies\": {}\n}",
"XML" => "\n\n - 示例数据
\n",
"Python" => "# Python 示例\ndef greet(name):\n return f'Hello, {name}!'\n\nprint(greet('World'))",
"Java" => "public class Example {\n public static void main(String[] args) {\n System.out.println(\"Hello World\");\n }\n}",
"SQL" => "-- SQL 示例\nSELECT * FROM Users;\n\nINSERT INTO Users (name, email) VALUES ('John', 'john@example.com');",
_ => "// 未支持的编程语言"
};
}
private void ClearCode()
{
Document.Text = string.Empty;
_logger?.LogInformation("代码已清空");
}
private void FormatCode()
{
_logger?.LogInformation("格式化代码: {Language}", SelectedLanguage);
// 这里可以添加代码格式化逻辑
}
}