Replace T4 with Source Generator (#459)
* Replace T4 template with source generator * remove space * Added summary --------- Co-authored-by: Burak Kaan Köse <bkaankose@outlook.com>
This commit is contained in:
Tiktack
165
Wino.SourceGenerators/Translator/TranslatorGenerator.cs
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165
Wino.SourceGenerators/Translator/TranslatorGenerator.cs
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using System;
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using System.Collections.Generic;
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using System.Collections.Immutable;
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using System.Linq;
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using System.Text;
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using System.Text.Json;
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using Microsoft.CodeAnalysis;
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using Microsoft.CodeAnalysis.CSharp.Syntax;
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using Microsoft.CodeAnalysis.Text;
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namespace Wino.SourceGenerators.Translator;
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[Generator]
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public class TranslatorSourceGenerator : IIncrementalGenerator
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{
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private const string TranslatorAttributeName = "Wino.Core.SourceGeneration.Translator.TranslatorGenAttribute";
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private const string AttributeText =
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"""
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using System;
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namespace Wino.Core.SourceGeneration.Translator
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{
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[AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
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public class TranslatorGenAttribute : Attribute
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{
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}
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}
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""";
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public void Initialize(IncrementalGeneratorInitializationContext context)
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{
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// Register the attribute source
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context.RegisterPostInitializationOutput(ctx => ctx.AddSource(
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"TranslatorGenAttribute.g.cs",
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SourceText.From(AttributeText, Encoding.UTF8)));
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// Get all classes with the TranslatorGenAttribute
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var classDeclarations = context.SyntaxProvider
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.ForAttributeWithMetadataName(
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TranslatorAttributeName,
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predicate: static (node, _) => node is ClassDeclarationSyntax,
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transform: static (context, _) => (ClassDeclarationSyntax)context.TargetNode);
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// Get the JSON schema
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var jsonSchema = context.AdditionalTextsProvider
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.Where(static file => file.Path.EndsWith("en_US\\resources.json"))
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.Select((text, _) => (text, text.GetText()))
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.Collect();
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// Combine the JSON schema with the marked classes
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var combined = classDeclarations.Combine(jsonSchema);
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// Generate the source
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context.RegisterSourceOutput(combined,
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static (spc, source) => Execute(source.Left, source.Right, spc));
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}
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private static void Execute(
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ClassDeclarationSyntax classDeclaration,
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ImmutableArray<(AdditionalText, SourceText?)> jsonFiles,
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SourceProductionContext context)
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{
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var (_, jsonContent) = jsonFiles.FirstOrDefault();
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if (jsonContent == null) return;
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// Parse JSON
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var jsonString = jsonContent.ToString();
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var translations = JsonSerializer.Deserialize<Dictionary<string, string>>(jsonString);
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if (translations == null) return;
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// Generate the class
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var namespaceName = GetNamespaceName(classDeclaration);
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var className = classDeclaration.Identifier.Text;
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var sb = new StringBuilder();
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sb.AppendLine($$"""
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namespace {{namespaceName}}
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{
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public partial class {{className}}
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{
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private static global::Wino.Core.Domain.Translations.WinoTranslationDictionary _dictionary;
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public static global::Wino.Core.Domain.Translations.WinoTranslationDictionary Resources
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{
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get
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{
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if (_dictionary == null)
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{
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_dictionary = new global::Wino.Core.Domain.Translations.WinoTranslationDictionary();
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}
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return _dictionary;
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}
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}
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""");
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string[] escapeChars = [" ", ";", "@", "$", "&", "(", ")", "-", "#", ":", "!", "'", "?", "{", "}", ","];
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foreach (var translation in translations)
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{
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// Generate proper allowed variable name by C#
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var allowedPropertyName = escapeChars.Aggregate(translation.Key, (c1, c2) => c1.Replace(c2, string.Empty));
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// There might be null values for some keys. Those will display as (null string) in the Comment;
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// The actual translation for the key will be the key itself at runtime.
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var beautifiedValue = translation.Value ?? "(null string)";
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// We need to trim the line ending literals for comments.
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var beautifiedComment = beautifiedValue.Replace('\r', ' ').Replace('\n', ' ');
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AddKey(sb, allowedPropertyName, beautifiedComment);
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}
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sb.AppendLine($"{Spacing(1)}}}");
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sb.AppendLine("}");
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context.AddSource($"{className}.g.cs", SourceText.From(sb.ToString(), Encoding.UTF8));
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}
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private static void AddKey(StringBuilder sb, string key, string? comment = null, int tabPos = 2)
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{
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var tabString = Spacing(tabPos);
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_ = sb.AppendLine();
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_ = sb.AppendLine($"{tabString}/// <summary>");
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_ = sb.AppendLine($"{tabString}/// {comment}");
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_ = sb.AppendLine($"{tabString}/// </summary>");
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_ = sb.AppendLine($"{tabString}public static string {key} => Resources.GetTranslatedString(\"{key}\");");
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}
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/// <summary>
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/// intent
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/// </summary>
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/// <param name="n">tab</param>
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/// <returns>4n*space</returns>
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internal static string Spacing(int n)
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{
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Span<char> spaces = stackalloc char[n * 4];
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spaces.Fill(' ');
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var sb = new StringBuilder(n * 4);
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foreach (var c in spaces)
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_ = sb.Append(c);
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return sb.ToString();
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}
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private static string GetNamespaceName(ClassDeclarationSyntax classDeclaration)
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{
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var namespaceName = string.Empty;
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var potentialNamespaceParent = classDeclaration.Parent;
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while (potentialNamespaceParent != null &&
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potentialNamespaceParent is not NamespaceDeclarationSyntax &&
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potentialNamespaceParent is not FileScopedNamespaceDeclarationSyntax)
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{
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potentialNamespaceParent = potentialNamespaceParent.Parent;
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}
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if (potentialNamespaceParent is BaseNamespaceDeclarationSyntax namespaceParent)
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{
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namespaceName = namespaceParent.Name.ToString();
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}
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return namespaceName;
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}
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}
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36
Wino.SourceGenerators/Wino.SourceGenerators.csproj
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36
Wino.SourceGenerators/Wino.SourceGenerators.csproj
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@@ -0,0 +1,36 @@
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>netstandard2.0</TargetFramework>
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<LangVersion>latest</LangVersion>
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<Nullable>enable</Nullable>
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<IncludeBuildOutput>false</IncludeBuildOutput>
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<PlatformTarget>AnyCPU</PlatformTarget>
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<EnforceExtendedAnalyzerRules>true</EnforceExtendedAnalyzerRules>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)' == 'Debug'">
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<DefineConstants>TRACE;DEBUG;NETFX_CORE</DefineConstants>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)' != 'Debug'">
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<DefineConstants>TRACE;RELEASE;NETFX_CORE</DefineConstants>
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<Optimize>true</Optimize>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.11.0" PrivateAssets="all" />
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<PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0" PrivateAssets="all" />
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<PackageReference Include="System.Text.Json" Version="8.0.5" PrivateAssets="all" />
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</ItemGroup>
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<PropertyGroup>
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<GetTargetPathDependsOn>$(GetTargetPathDependsOn);GetDependencyTargetPaths</GetTargetPathDependsOn>
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</PropertyGroup>
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<Target Name="GetDependencyTargetPaths" AfterTargets="ResolvePackageDependenciesForBuild">
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<ItemGroup>
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<TargetPathWithTargetPlatformMoniker Include="@(ResolvedCompileFileDefinitions)" IncludeRuntimeDependency="false" />
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</ItemGroup>
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</Target>
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</Project>
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