mirror of
https://gitee.com/langsisi_admin/serein-flow
synced 2026-03-03 00:00:49 +08:00
463 lines
21 KiB
C#
463 lines
21 KiB
C#
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using Microsoft.CodeAnalysis;
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using Microsoft.CodeAnalysis.CSharp;
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using Microsoft.CodeAnalysis.CSharp.Syntax;
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using Microsoft.CodeAnalysis.Text;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Threading;
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namespace Serein.Library.MyGenerator
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{
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/// <summary>
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/// 一个增量源生成器,用于为带有自定义 MyClassAttribute 特性的类中的字段生成带有自定义 set 行为的属性。
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/// </summary>
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[Generator]
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public class MyPropertyGenerator : IIncrementalGenerator
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{
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/// <summary>
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/// 初始化生成器,定义需要执行的生成逻辑。
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/// </summary>
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/// <param name="context">增量生成器的上下文,用于注册生成逻辑。</param>
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public void Initialize(IncrementalGeneratorInitializationContext context)
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{
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/*
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CreateSyntaxProvider : 第一个参数用于筛选特定语法节点,第二个参数则用于转换筛选出来的节点。
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SemanticModel : 通过 语义模型 (SemanticModel) 来解析代码中的符号信息,获取类、方法、属性等更具体的类型和特性信息。例如某个特性属于哪个类型。
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AddSource : 生成器的最终目标是生成代码。使用 AddSource 将生成的代码以字符串形式注入到编译过程当中。通常会通过字符串拼接或 StringBuilder 来构建生成的 C# 代码。
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*/
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// 通过 SyntaxProvider 查找所有带有任意特性修饰的类声明语法节点
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var classDeclarations = context.SyntaxProvider
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.CreateSyntaxProvider(
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// 定义要查找的语法节点类型,这里我们只关心类声明 (ClassDeclarationSyntax) 并且它们有至少一个特性 (Attribute)
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(node, _) => node is ClassDeclarationSyntax cds && cds.AttributeLists.Count > 0,
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// 提供一个函数来进一步分析这些类,并且只返回带有 MyClassAttribute 特性的类声明
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(tmpContext, _) =>
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{
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var classDeclaration = (ClassDeclarationSyntax)tmpContext.Node;
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var semanticModel = tmpContext.SemanticModel;
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// 检查类的特性列表,看看是否存在 MyClassAttribute
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if (classDeclaration.AttributeLists
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.SelectMany(attrList => attrList.Attributes)
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.Any(attr => semanticModel.GetSymbolInfo(attr).Symbol?.ContainingType.Name == "AutoPropertyAttribute"))
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{
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var classSymbol = semanticModel.GetDeclaredSymbol(classDeclaration); // 获取类的符号
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var classInfo = classSymbol.BuildCacheOfClass();
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return (classDeclaration, classInfo);
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}
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return (null, null);
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})
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// 过滤掉空结果
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.Where(cds => cds.classDeclaration != null);
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// 注册一个源生成任务,使用找到的类生成代码
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context.RegisterSourceOutput(classDeclarations, (sourceProductionContext, result) =>
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{
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// 获取 MyDataAttribute 中的 Type 参数,可以获取多个,这里为了记录代码获取了第一个
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//var typeArgument = attributeData.ConstructorArguments.FirstOrDefault();
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//var dataType = typeArgument.Value as INamedTypeSymbol;
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//Console.WriteLine(dataType);
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if (result.classDeclaration is ClassDeclarationSyntax classSyntax)
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{
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// 获取类的命名空间和类名
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var namespaceName = GetNamespace(classSyntax);
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var className = classSyntax.Identifier.Text;
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// 生成属性代码
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var generatedCode = GenerateProperties(classSyntax, result.classInfo, namespaceName, className);
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// 将生成的代码添加为源文件
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sourceProductionContext.AddSource($"{className}.g.cs", SourceText.From(generatedCode, Encoding.UTF8));
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}
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});
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}
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/// <summary>
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/// 为给定的类生成带有自定义 set 行为的属性。
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///
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/// </summary>
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/// <param name="classSyntax">类的语法树节点。</param>
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/// <param name="namespaceName">类所在的命名空间。</param>
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/// <param name="className">类的名称。</param>
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/// <returns>生成的 C# 属性代码。</returns>
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private string GenerateProperties(ClassDeclarationSyntax classSyntax,
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Dictionary<string, Dictionary<string, object>> classInfo,
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string namespaceName,
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string className)
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{
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var sb = new StringBuilder();
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// 生成命名空间和类的开始部分
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sb.AppendLine($"using System;");
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sb.AppendLine($"using Serein.Library;");
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sb.AppendLine($"using Serein.Library.Api;");
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sb.AppendLine($"");
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sb.AppendLine($"namespace {namespaceName}");
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sb.AppendLine("{");
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sb.AppendLine($" public partial class {className}");
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sb.AppendLine(" {");
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var path = classInfo["AutoPropertyAttribute"]["ValuePath"];
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// "ParameterDetails";
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// "MethodDetails";
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try
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{
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var expInfo = MyAttributeResolver.BuildCacheOfField(classSyntax.Members.OfType<FieldDeclarationSyntax>());
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foreach (var fieldKV in expInfo)
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{
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var field = fieldKV.Key;
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if (field.IsReadonly())
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{
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continue;
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}
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var leadingTrivia = field.GetLeadingTrivia().InsertSummaryComment("(此属性由源生成器生成)").ToString(); // 获取注释
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var fieldName = field.Declaration.Variables.First().Identifier.Text; // 获取字段名称
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var fieldType = field.Declaration.Type.ToString(); // 获取字段类型
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var propertyName = field.ToPropertyName(); // 转为合适的属性名称
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var attributeInfo = fieldKV.Value; // 缓存的特性信息
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//if (!attributeInfo.TryGetValue("PropertyInfo",out var tmp) || tmp.Count == 0)
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//{
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// continue;
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//}
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// 生成 getter / setter
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sb.AppendLine(leadingTrivia);
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sb.AppendLine($" public {fieldType} {propertyName}");
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sb.AppendLine(" {");
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sb.AppendLine($" get => {fieldName};");
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sb.AppendLine(" set");
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sb.AppendLine(" {");
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sb.AppendLine($" if ({fieldName} != value)");
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sb.AppendLine(" {");
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if (attributeInfo.Search("PropertyInfo", "IsPrint", "true")) // 是否打印
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{
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sb.AddCode(5, $"Console.WriteLine({fieldName});");
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}
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if (attributeInfo.Search("PropertyInfo", "IsNotification", "true")) // 是否通知
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{
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if (classInfo.ExitsPath("MethodDetails"))
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{
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sb.AddCode(5, $"nodeModel?.Env?.NotificationNodeValueChangeAsync(nodeModel.Guid, \"MethodDetails.\"+nameof({propertyName}), value);");
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}
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else if (classInfo.ExitsPath("ParameterDetails"))
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{
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sb.AddCode(5, "nodeModel?.Env?.NotificationNodeValueChangeAsync(nodeModel.Guid, \"MethodDetails.ParameterDetailss[\"+$\"{Index}\"+\"]." + $"\"+nameof({propertyName}),value);");
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}
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}
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sb.AppendLine($" {fieldName} = value;");
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sb.AppendLine(" }");
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sb.AppendLine(" }");
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sb.AppendLine(" }");
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}
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}
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finally
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{
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// 生成类的结束部分
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sb.AppendLine(" }");
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sb.AppendLine("}");
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}
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return sb.ToString(); // 返回生成的代码
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}
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/// <summary>
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/// 获取类所在的命名空间。
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/// </summary>
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/// <param name="classSyntax">类的语法节点。</param>
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/// <returns>命名空间的名称,或者 "GlobalNamespace" 如果没有命名空间声明。</returns>
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private string GetNamespace(SyntaxNode classSyntax)
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{
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// 查找最近的命名空间声明
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var namespaceDeclaration = classSyntax.Ancestors().OfType<NamespaceDeclarationSyntax>().FirstOrDefault();
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return namespaceDeclaration?.Name.ToString() ?? "GlobalNamespace";
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}
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}
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public static class DocumentationCommentExtensions
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{
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/// <summary>
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/// 为 XML 文档注释中的 <summary> 标签插入指定的文本
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/// </summary>
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/// <param name="triviaList">语法节点的 LeadingTrivia 或 TrailingTrivia 列表</param>
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/// <param name="comment">要插入的注释文本</param>
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/// <returns>修改后的 Trivia 列表</returns>
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public static SyntaxTriviaList InsertSummaryComment(this SyntaxTriviaList triviaList, string comment)
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{
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var docCommentTrivia = triviaList.FirstOrDefault(trivia =>
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trivia.IsKind(SyntaxKind.SingleLineDocumentationCommentTrivia) ||
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trivia.IsKind(SyntaxKind.MultiLineDocumentationCommentTrivia));
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if (docCommentTrivia.HasStructure)
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{
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//var structuredTrivia = docCommentTrivia.GetStructure();
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var structuredTrivia = docCommentTrivia.GetStructure() as StructuredTriviaSyntax;
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// 查找 <summary> 标签
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var summaryNode = structuredTrivia.DescendantNodes()
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.OfType<XmlElementSyntax>()
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.FirstOrDefault(e => e.StartTag.Name.LocalName.Text == "summary");
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if (summaryNode != null)
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{
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//// 在 <summary> 标签内插入指定的注释文本
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//var generatorComment = SyntaxFactory.XmlText(comment).WithLeadingTrivia(SyntaxFactory.Whitespace(" "));
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//var updatedSummaryNode = summaryNode.AddContent(generatorComment);
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//// 用新的 <summary> 标签替换原来的
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//var updatedStructuredTrivia = structuredTrivia.ReplaceNode(summaryNode, updatedSummaryNode);
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//// 用新的注释替换原来的
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//var updatedTrivia = SyntaxFactory.Trivia(updatedStructuredTrivia);
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//triviaList = triviaList.Replace(docCommentTrivia, updatedTrivia);
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// 创建 <para> 段落注释
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var paraElement = SyntaxFactory.XmlElement(
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SyntaxFactory.XmlElementStartTag(SyntaxFactory.XmlName("para")), // 起始标签 <para>
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SyntaxFactory.SingletonList<XmlNodeSyntax>( // 内容
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SyntaxFactory.XmlText(comment).WithLeadingTrivia(SyntaxFactory.Whitespace(" "))
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),
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SyntaxFactory.XmlElementEndTag(SyntaxFactory.XmlName("para")) // 结束标签 </para>
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);
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// 将 <para> 插入到 <summary> 中
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var updatedSummaryNode = summaryNode.AddContent(paraElement);
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// 用新的 <summary> 标签替换原来的
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var updatedStructuredTrivia = structuredTrivia.ReplaceNode(summaryNode, updatedSummaryNode);
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// 用新的注释替换原来的 (确保转换为 StructuredTriviaSyntax 类型)
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var updatedTrivia = SyntaxFactory.Trivia(updatedStructuredTrivia);
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triviaList = triviaList.Replace(docCommentTrivia, updatedTrivia);
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}
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}
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return triviaList;
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}
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}
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public static class MyAttributeResolver
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{
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public static Dictionary<string, Dictionary<string, object>> BuildCacheOfClass(this INamedTypeSymbol classSymbol)
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{
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Dictionary<string, Dictionary<string, object>> attributesOfClass = new Dictionary<string, Dictionary<string, object>>();
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var tattribute = classSymbol.GetAttributes();
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foreach (var cad in tattribute)
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{
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var attributeName = cad.AttributeClass?.Name;
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if (!attributesOfClass.TryGetValue(attributeName, out var attributeInfo))
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{
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attributeInfo = new Dictionary<string, object>();
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attributesOfClass.Add(attributeName, attributeInfo);
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}
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foreach (var cata in cad.NamedArguments)
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{
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var key = cata.Key;
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var value = cata.Value.Value;
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if (!attributeInfo.ContainsKey(key))
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{
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attributeInfo.Add(key, value);
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}
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//Console.WriteLine("key:" + cata.Key);// 类特性的属性名
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//Console.WriteLine("value:" + cata.Value.Value); // 类特性的属性值
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}
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}
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return attributesOfClass;
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}
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/// <summary>
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/// 字段名称转换为属性名称
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/// </summary>
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/// <param name="field"></param>
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/// <returns>遵循属性命名规范的新名称</returns>
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public static string ToPropertyName(this FieldDeclarationSyntax field)
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{
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var fieldName = field.Declaration.Variables.First().Identifier.Text;
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var propertyName = fieldName.StartsWith("_") ? char.ToUpper(fieldName[1]) + fieldName.Substring(2) : char.ToUpper(fieldName[0]) + fieldName.Substring(1); // 创建属性名称
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return propertyName;
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}
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/// <summary>
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/// 判断字段是否为只读
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/// </summary>
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/// <param name="fieldDeclaration">字段的语法节点</param>
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/// <returns>如果字段是只读的,返回 true;否则返回 false</returns>
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public static bool IsReadonly(this FieldDeclarationSyntax fieldDeclaration)
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{
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// 判断字段是否有 readonly 修饰符
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return fieldDeclaration.Modifiers.Any(SyntaxKind.ReadOnlyKeyword);
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}
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|
|
|||
|
|
/// <summary>
|
|||
|
|
/// <para>构建字段的缓存信息</para>
|
|||
|
|
/// <para>第1层:字段名称 - 特性集合</para>
|
|||
|
|
/// <para>第2层:特性名称 - 特性属性集合</para>
|
|||
|
|
/// <para>第3层:特性属性名称 - 对应的字面量</para>
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="fieldDeclarationSyntaxes"></param>
|
|||
|
|
/// <returns>关于字段的特性缓存信息</returns>
|
|||
|
|
public static Dictionary<FieldDeclarationSyntax, Dictionary<string, Dictionary<string, string>>> BuildCacheOfField(IEnumerable<FieldDeclarationSyntax> fieldDeclarationSyntaxes)
|
|||
|
|
{
|
|||
|
|
Dictionary<FieldDeclarationSyntax, Dictionary<string, Dictionary<string, string>>> FieldData = new Dictionary<FieldDeclarationSyntax, Dictionary<string, Dictionary<string, string>>>();
|
|||
|
|
foreach (var field in fieldDeclarationSyntaxes)
|
|||
|
|
{
|
|||
|
|
// 获取字段名称和类型
|
|||
|
|
var variable = field.Declaration.Variables.First();
|
|||
|
|
var fieldName = variable.Identifier.Text;
|
|||
|
|
var fieldType = field.Declaration.Type.ToString();
|
|||
|
|
|
|||
|
|
var attributeInfo = new Dictionary<string, Dictionary<string, string>>(); // 发现一个新字段
|
|||
|
|
FieldData.Add(field, attributeInfo);
|
|||
|
|
|
|||
|
|
|
|||
|
|
var attributes = field.AttributeLists;
|
|||
|
|
foreach (var attributeList in attributes)
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
// 解析特性参数
|
|||
|
|
foreach (var attribute in attributeList.Attributes)
|
|||
|
|
{
|
|||
|
|
var attributeName = attribute.Name.ToString(); // 特性名称
|
|||
|
|
var arguments = attribute.ArgumentList?.Arguments;
|
|||
|
|
if (arguments == null)
|
|||
|
|
{
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
var attributeValue = new Dictionary<string, string>();
|
|||
|
|
attributeInfo.Add(attributeName, attributeValue); // 找到特性
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
// 解析命名属性
|
|||
|
|
foreach (var argument in arguments)
|
|||
|
|
{
|
|||
|
|
// Console.WriteLine($" - Constructor Argument: {argument.ToString()}");
|
|||
|
|
if (argument is AttributeArgumentSyntax attributeArgument && attributeArgument.NameEquals != null)
|
|||
|
|
{
|
|||
|
|
var propertyName = attributeArgument.NameEquals.Name.ToString();
|
|||
|
|
var propertyValue = attributeArgument.Expression.ToString();
|
|||
|
|
attributeValue.Add(propertyName, propertyValue); // 记录属性
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return FieldData;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// <para>通过条件检查缓存的信息,决定是否添加代码</para>
|
|||
|
|
/// <para>首先检查是否存在该特性,如果不存在,返回 false。</para>
|
|||
|
|
/// <para>然后检查是否存在属性,如果不存在,返回 false</para>
|
|||
|
|
/// <para>如果存在属性,则返回属性对应的值与 comparisonValue 进行比较,返回
|
|||
|
|
/// <para></para>
|
|||
|
|
/// <para>若只传入 attributeName 参数,则只会检查是否存在该特性</para>
|
|||
|
|
/// <para>若只传入 attributeName与attributePropertyName 参数,则只会检查是否存在该特性的该属性</para>
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="dict">缓存的特性信息</param>
|
|||
|
|
/// <param name="attributeName">查询的特性名称</param>
|
|||
|
|
/// <param name="attributePropertyName">查询的特性属性名称</param>
|
|||
|
|
/// <param name="comparisonValue">比较值</param>
|
|||
|
|
/// <returns>如果存在查询项,返回 true ,否则返回 false</returns>
|
|||
|
|
public static bool Search(this Dictionary<string, Dictionary<string, string>> dict,
|
|||
|
|
string attributeName = null,
|
|||
|
|
string attributePropertyName = null,
|
|||
|
|
string comparisonValue = null)
|
|||
|
|
{
|
|||
|
|
if (string.IsNullOrWhiteSpace(attributeName))
|
|||
|
|
return false;
|
|||
|
|
if (!dict.TryGetValue(attributeName, out var abs))
|
|||
|
|
return false;
|
|||
|
|
|
|||
|
|
if (string.IsNullOrWhiteSpace(attributePropertyName))
|
|||
|
|
return true;
|
|||
|
|
if (!abs.TryGetValue(attributePropertyName, out var absValue))
|
|||
|
|
return false;
|
|||
|
|
if (string.IsNullOrWhiteSpace(comparisonValue))
|
|||
|
|
return true;
|
|||
|
|
return absValue.Equals(comparisonValue);
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// 添加代码
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="sb">字符串构建器</param>
|
|||
|
|
/// <param name="retractCount">缩进次数(4个空格)</param>
|
|||
|
|
/// <param name="code">要添加的代码</param>
|
|||
|
|
/// <returns>字符串构建器本身</returns>
|
|||
|
|
public static StringBuilder AddCode(this StringBuilder sb,
|
|||
|
|
int retractCount = 0,
|
|||
|
|
string code = null)
|
|||
|
|
{
|
|||
|
|
if (!string.IsNullOrWhiteSpace(code))
|
|||
|
|
{
|
|||
|
|
var retract = new string(' ', retractCount * 4);
|
|||
|
|
sb.AppendLine(retract + code);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return sb;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
public static bool ExitsPath(this Dictionary<string, Dictionary<string, object>> classInfo, string valuePath)
|
|||
|
|
{
|
|||
|
|
// var path = classInfo["AutoPropertyAttribute"]["ValuePath"];
|
|||
|
|
|
|||
|
|
if (!classInfo.TryGetValue("AutoPropertyAttribute", out var keyValuePairs))
|
|||
|
|
{
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (!keyValuePairs.TryGetValue("ValuePath", out var value))
|
|||
|
|
{
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return value.Equals(valuePath);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
}
|