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144 lines
5.2 KiB
144 lines
5.2 KiB
using Microsoft.Extensions.Logging;
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using ReactiveUI;
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using System;
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using System.Collections.ObjectModel;
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using System.Reactive;
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using AvaloniaEdit.Document;
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namespace MyAvaloniaApp.ViewModels.Pages;
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/// <summary>
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/// 代码编辑器页面的 ViewModel
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/// </summary>
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public class EditorPageViewModel : ReactiveObject
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{
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private string _selectedLanguage = "C#";
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private TextDocument _document;
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private readonly ILogger<EditorPageViewModel>? _logger;
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public ObservableCollection<string> AvailableLanguages { get; }
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public string SelectedLanguage
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{
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get => _selectedLanguage;
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set => this.RaiseAndSetIfChanged(ref _selectedLanguage, value);
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}
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public TextDocument Document
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{
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get => _document;
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set => this.RaiseAndSetIfChanged(ref _document, value);
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}
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// 响应式命令
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public ReactiveCommand<Unit, Unit> ClearCodeCommand { get; }
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public ReactiveCommand<Unit, Unit> FormatCodeCommand { get; }
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public EditorPageViewModel(ILogger<EditorPageViewModel>? logger = null)
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{
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_logger = logger;
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// 先初始化 Document，确保绑定时有值
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_document = new TextDocument();
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AvailableLanguages = new ObservableCollection<string>
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{
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"C#",
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"JavaScript",
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"TypeScript",
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"HTML",
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"CSS",
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"JSON",
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"XML",
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"Python",
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"Java",
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"SQL"
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};
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_logger?.LogInformation("EditorPageViewModel 已创建");
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// 初始化示例代码
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InitializeDefaultCode();
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// 创建命令
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ClearCodeCommand = ReactiveCommand.Create(ClearCode);
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FormatCodeCommand = ReactiveCommand.Create(FormatCode);
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// 监听语言选择变化
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this.WhenAnyValue(x => x.SelectedLanguage)
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.Subscribe(lang =>
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{
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_logger?.LogInformation("切换语言: {Language}", lang);
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UpdateCodeForLanguage(lang);
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});
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}
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private void InitializeDefaultCode()
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{
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var defaultCode = "// 欢迎使用 AvaloniaEdit.TextMate 代码编辑器\n" +
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"// 选择不同的编程语言查看语法高亮效果\n" +
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"\n" +
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"using System;\n" +
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"\n" +
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"namespace MyAvaloniaApp\n" +
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"{\n" +
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" public class Program\n" +
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" {\n" +
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" public static void Main(string[] args)\n" +
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" {\n" +
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" Console.WriteLine(\"Hello, AvaloniaEdit!\");\n" +
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" }\n" +
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" }\n" +
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"}";
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Document.Text = defaultCode;
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}
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private void UpdateCodeForLanguage(string language)
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{
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Document.Text = GetDefaultCode(language);
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_logger?.LogInformation("代码已更新为: {Language}", language);
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}
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private string GetDefaultCode(string language)
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{
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return language switch
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{
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"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}",
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"JavaScript" => "// JavaScript 示例\nfunction greet(name) {\n return `Hello, ${name}!`;\n}\n\nconst person = 'World';\nconsole.log(greet(person));",
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"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);",
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"HTML" => "<!DOCTYPE html>\n<html>\n<head>\n <title>示例</title>\n</head>\n<body>\n <h1>Hello World</h1>\n</body>\n</html>",
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"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}",
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"JSON" => "{\n \"name\": \"MyApp\",\n \"version\": \"1.0.0\",\n \"dependencies\": {}\n}",
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"XML" => "<?xml version=\"1.0\"?>\n<root>\n <item>示例数据</item>\n</root>",
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"Python" => "# Python 示例\ndef greet(name):\n return f'Hello, {name}!'\n\nprint(greet('World'))",
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"Java" => "public class Example {\n public static void main(String[] args) {\n System.out.println(\"Hello World\");\n }\n}",
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"SQL" => "-- SQL 示例\nSELECT * FROM Users;\n\nINSERT INTO Users (name, email) VALUES ('John', 'john@example.com');",
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_ => "// 未支持的编程语言"
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};
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}
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private void ClearCode()
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{
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Document.Text = string.Empty;
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_logger?.LogInformation("代码已清空");
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}
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private void FormatCode()
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{
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_logger?.LogInformation("格式化代码: {Language}", SelectedLanguage);
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// 这里可以添加代码格式化逻辑
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}
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}
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