新增(generator): 支持多占位符及命名空间解析

新增[Program.cs]: 增加多参数RegionInject特性及Show1方法
新增[Directory.Build.props]: 更新版本号至1.0.3
新增[CodeInjectIncrementalSourceGenerator.cs]:
- 引入System.Diagnostics命名空间
- 支持params string[]占位符参数
- 增加文件作用域命名空间解析逻辑
- 增加空内容及空类检查逻辑
修复[CodeInjectIncrementalSourceGenerator.cs]: 修复classSymbol空检查逻辑
优化[CodeInjectIncrementalSourceGenerator.cs]: 优化占位符提取逻辑

Author: RRQM

Directory.Build.props

@@ -1,6 +1,6 @@
 <Project>
 	<PropertyGroup>
-		<Version>1.0.2</Version>
+		<Version>1.0.3</Version>
 		<CheckForOverflowUnderflow>false</CheckForOverflowUnderflow>
 		<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
 		<LangVersion>preview</LangVersion>

demo/CodeRegionExamplesConsoleApp/Program.cs

@@ -16,10 +16,12 @@
 namespace CodeRegionExamplesConsoleApp;
 
 [RegionInject("./CodeRegionTemplateConsoleApp/Program.cs", "Show")]
+[RegionInject("./CodeRegionTemplateConsoleApp/Program.cs", "Show1","Show123","Show222")]
 internal partial class ExampleProgram
 {
     static void Main(string[] args)
     {
         Show();
+        Show1();
     }
 }

demo/CodeRegionTemplateConsoleApp/Program.cs

@@ -26,4 +26,11 @@ public static void Show()
     }
     #endregion
 
+
+    #region Show1
+    public static void Show1()
+    {
+        Console.WriteLine("Show123");
+    }
+    #endregion
 }

src/CodeInjectSourceGenerator/CodeInjectIncrementalSourceGenerator.cs

@@ -17,6 +17,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Reflection;
@@ -130,8 +131,10 @@ private static ClassToGenerate GetSemanticTargetForGeneration(GeneratorSyntaxCon
             var classSymbol = semanticModel.GetDeclaredSymbol(classDeclarationSyntax);
 
             if (classSymbol is null)
+            {
                 return null;
-
+            }
+            
             var attributes = new List<RegionInjectData>();
 
             foreach (var attributeData in classSymbol.GetAttributes())
@@ -157,33 +160,43 @@ private static ClassToGenerate GetSemanticTargetForGeneration(GeneratorSyntaxCon
                 var placeholders = new List<string>();
 
                 // 从构造函数参数获取占位符
-                if (attributeData.ConstructorArguments.Length > 2)
+                // 检查是否使用了带 params string[] 的构造函数
+                if (attributeData.ConstructorArguments.Length >= 3)
                 {
-                    for (var i = 2; i < attributeData.ConstructorArguments.Length; i++)
+                    // 第3个参数是 params string[] placeholders
+                    var placeholdersArg = attributeData.ConstructorArguments[2];
+                    if (placeholdersArg.Kind == TypedConstantKind.Array && !placeholdersArg.IsNull)
                     {
-                        var value = attributeData.ConstructorArguments[i].Value?.ToString();
-                        if (!string.IsNullOrEmpty(value))
+                        var arrayValues = placeholdersArg.Values;
+                        foreach (var item in arrayValues)
                         {
-                            placeholders.Add(value);
+                            var stringValue = item.Value?.ToString();
+                            if (!string.IsNullOrEmpty(stringValue))
+                            {
+                                placeholders.Add(stringValue);
+                            }
                         }
                     }
                 }
 
-                // 从 Placeholders 属性获取占位符
-                foreach (var namedArgument in attributeData.NamedArguments)
+                // 如果构造函数中没有占位符，再从 Placeholders 属性获取
+                if (placeholders.Count == 0)
                 {
-                    if (namedArgument.Key == "Placeholders")
+                    foreach (var namedArgument in attributeData.NamedArguments)
                     {
-                        var value = namedArgument.Value;
-                        if (value.Kind == TypedConstantKind.Array && !value.IsNull)
+                        if (namedArgument.Key == "Placeholders")
                         {
-                            var arrayValues = value.Values;
-                            foreach (var item in arrayValues)
+                            var value = namedArgument.Value;
+                            if (value.Kind == TypedConstantKind.Array && !value.IsNull)
                             {
-                                var stringValue = item.Value?.ToString();
-                                if (!string.IsNullOrEmpty(stringValue))
+                                var arrayValues = value.Values;
+                                foreach (var item in arrayValues)
                                 {
-                                    placeholders.Add(stringValue);
+                                    var stringValue = item.Value?.ToString();
+                                    if (!string.IsNullOrEmpty(stringValue))
+                                    {
+                                        placeholders.Add(stringValue);
+                                    }
                                 }
                             }
                         }
@@ -217,19 +230,25 @@ private static string GetNamespace(ClassDeclarationSyntax classDeclaration)
     {
         var namespaceDeclaration = classDeclaration.Ancestors().OfType<NamespaceDeclarationSyntax>().FirstOrDefault();
         if (namespaceDeclaration != null)
+        {
             return namespaceDeclaration.Name.ToString();
+        }
 
         var fileScopedNamespace = classDeclaration.Ancestors().OfType<FileScopedNamespaceDeclarationSyntax>().FirstOrDefault();
         if (fileScopedNamespace != null)
+        {
             return fileScopedNamespace.Name.ToString();
+        }
 
         return string.Empty;
     }
 
     private static void Execute(ImmutableArray<ClassToGenerate> classes, ImmutableArray<AdditionalText> additionalFiles, SourceProductionContext context)
     {
         if (classes.IsDefaultOrEmpty)
+        {
             return;
+        }
 
         foreach (var classToGenerate in classes)
         {
@@ -285,7 +304,9 @@ private static string GenerateClass(ClassToGenerate classInfo, ImmutableArray<Ad
     private static string FormatInjectedCode(string code, string indentation)
     {
         if (string.IsNullOrEmpty(code))
+        {
             return string.Empty;
+        }
 
         var lines = code.Split(new[] { '\r', '\n' }, StringSplitOptions.None);
         var formattedLines = new List<string>();
@@ -453,7 +474,9 @@ private static string ExtractRegion(string fileContent, string regionName)
     private static string ProcessPlaceholders(string content, string[] placeholders)
     {
         if (placeholders.Length == 0)
+        {
             return content;
+        }
 
         var result = content;