03c26d6618
ReadOnly properties are currently not allowed because the generated code needs to set them, this also apply to `init` properties because they need to be set after initialization.
662 lines
26 KiB
C#
662 lines
26 KiB
C#
using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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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 Godot.SourceGenerators
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{
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[Generator]
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public class ScriptPropertiesGenerator : ISourceGenerator
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{
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public void Initialize(GeneratorInitializationContext context)
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{
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}
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public void Execute(GeneratorExecutionContext context)
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{
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if (context.AreGodotSourceGeneratorsDisabled())
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return;
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INamedTypeSymbol[] godotClasses = context
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.Compilation.SyntaxTrees
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.SelectMany(tree =>
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tree.GetRoot().DescendantNodes()
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.OfType<ClassDeclarationSyntax>()
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.SelectGodotScriptClasses(context.Compilation)
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// Report and skip non-partial classes
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.Where(x =>
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{
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if (x.cds.IsPartial())
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{
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if (x.cds.IsNested() && !x.cds.AreAllOuterTypesPartial(out var typeMissingPartial))
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{
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Common.ReportNonPartialGodotScriptOuterClass(context, typeMissingPartial!);
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return false;
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}
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return true;
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}
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Common.ReportNonPartialGodotScriptClass(context, x.cds, x.symbol);
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return false;
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})
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.Select(x => x.symbol)
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)
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.Distinct<INamedTypeSymbol>(SymbolEqualityComparer.Default)
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.ToArray();
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if (godotClasses.Length > 0)
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{
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var typeCache = new MarshalUtils.TypeCache(context.Compilation);
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foreach (var godotClass in godotClasses)
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{
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VisitGodotScriptClass(context, typeCache, godotClass);
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}
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}
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}
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private static void VisitGodotScriptClass(
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GeneratorExecutionContext context,
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MarshalUtils.TypeCache typeCache,
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INamedTypeSymbol symbol
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)
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{
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INamespaceSymbol namespaceSymbol = symbol.ContainingNamespace;
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string classNs = namespaceSymbol != null && !namespaceSymbol.IsGlobalNamespace ?
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namespaceSymbol.FullQualifiedNameOmitGlobal() :
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string.Empty;
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bool hasNamespace = classNs.Length != 0;
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bool isInnerClass = symbol.ContainingType != null;
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string uniqueHint = symbol.FullQualifiedNameOmitGlobal().SanitizeQualifiedNameForUniqueHint()
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+ "_ScriptProperties.generated";
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var source = new StringBuilder();
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source.Append("using Godot;\n");
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source.Append("using Godot.NativeInterop;\n");
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source.Append("\n");
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if (hasNamespace)
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{
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source.Append("namespace ");
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source.Append(classNs);
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source.Append(" {\n\n");
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}
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if (isInnerClass)
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{
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var containingType = symbol.ContainingType;
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while (containingType != null)
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{
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source.Append("partial ");
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source.Append(containingType.GetDeclarationKeyword());
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source.Append(" ");
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source.Append(containingType.NameWithTypeParameters());
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source.Append("\n{\n");
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containingType = containingType.ContainingType;
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}
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}
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source.Append("partial class ");
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source.Append(symbol.NameWithTypeParameters());
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source.Append("\n{\n");
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var members = symbol.GetMembers();
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var propertySymbols = members
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.Where(s => !s.IsStatic && s.Kind == SymbolKind.Property)
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.Cast<IPropertySymbol>()
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.Where(s => !s.IsIndexer);
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var fieldSymbols = members
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.Where(s => !s.IsStatic && s.Kind == SymbolKind.Field && !s.IsImplicitlyDeclared)
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.Cast<IFieldSymbol>();
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var godotClassProperties = propertySymbols.WhereIsGodotCompatibleType(typeCache).ToArray();
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var godotClassFields = fieldSymbols.WhereIsGodotCompatibleType(typeCache).ToArray();
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source.Append("#pragma warning disable CS0109 // Disable warning about redundant 'new' keyword\n");
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source.Append(
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$" public new class PropertyName : {symbol.BaseType.FullQualifiedNameIncludeGlobal()}.PropertyName {{\n");
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// Generate cached StringNames for methods and properties, for fast lookup
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foreach (var property in godotClassProperties)
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{
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string propertyName = property.PropertySymbol.Name;
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source.Append(" public new static readonly global::Godot.StringName ");
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source.Append(propertyName);
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source.Append(" = \"");
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source.Append(propertyName);
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source.Append("\";\n");
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}
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foreach (var field in godotClassFields)
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{
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string fieldName = field.FieldSymbol.Name;
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source.Append(" public new static readonly global::Godot.StringName ");
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source.Append(fieldName);
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source.Append(" = \"");
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source.Append(fieldName);
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source.Append("\";\n");
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}
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source.Append(" }\n"); // class GodotInternal
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if (godotClassProperties.Length > 0 || godotClassFields.Length > 0)
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{
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bool isFirstEntry;
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// Generate SetGodotClassPropertyValue
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bool allPropertiesAreReadOnly = godotClassFields.All(fi => fi.FieldSymbol.IsReadOnly) &&
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godotClassProperties.All(pi => pi.PropertySymbol.IsReadOnly || pi.PropertySymbol.SetMethod!.IsInitOnly);
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if (!allPropertiesAreReadOnly)
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{
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source.Append(" protected override bool SetGodotClassPropertyValue(in godot_string_name name, ");
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source.Append("in godot_variant value)\n {\n");
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isFirstEntry = true;
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foreach (var property in godotClassProperties)
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{
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if (property.PropertySymbol.IsReadOnly || property.PropertySymbol.SetMethod!.IsInitOnly)
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continue;
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GeneratePropertySetter(property.PropertySymbol.Name,
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property.PropertySymbol.Type, property.Type, source, isFirstEntry);
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isFirstEntry = false;
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}
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foreach (var field in godotClassFields)
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{
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if (field.FieldSymbol.IsReadOnly)
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continue;
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GeneratePropertySetter(field.FieldSymbol.Name,
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field.FieldSymbol.Type, field.Type, source, isFirstEntry);
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isFirstEntry = false;
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}
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source.Append(" return base.SetGodotClassPropertyValue(name, value);\n");
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source.Append(" }\n");
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}
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// Generate GetGodotClassPropertyValue
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source.Append(" protected override bool GetGodotClassPropertyValue(in godot_string_name name, ");
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source.Append("out godot_variant value)\n {\n");
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isFirstEntry = true;
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foreach (var property in godotClassProperties)
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{
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GeneratePropertyGetter(property.PropertySymbol.Name,
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property.PropertySymbol.Type, property.Type, source, isFirstEntry);
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isFirstEntry = false;
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}
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foreach (var field in godotClassFields)
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{
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GeneratePropertyGetter(field.FieldSymbol.Name,
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field.FieldSymbol.Type, field.Type, source, isFirstEntry);
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isFirstEntry = false;
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}
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source.Append(" return base.GetGodotClassPropertyValue(name, out value);\n");
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source.Append(" }\n");
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// Generate GetGodotPropertyList
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string dictionaryType = "global::System.Collections.Generic.List<global::Godot.Bridge.PropertyInfo>";
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source.Append(" internal new static ")
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.Append(dictionaryType)
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.Append(" GetGodotPropertyList()\n {\n");
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source.Append(" var properties = new ")
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.Append(dictionaryType)
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.Append("();\n");
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// To retain the definition order (and display categories correctly), we want to
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// iterate over fields and properties at the same time, sorted by line number.
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var godotClassPropertiesAndFields = Enumerable.Empty<GodotPropertyOrFieldData>()
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.Concat(godotClassProperties.Select(propertyData => new GodotPropertyOrFieldData(propertyData)))
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.Concat(godotClassFields.Select(fieldData => new GodotPropertyOrFieldData(fieldData)))
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.OrderBy(data => data.Symbol.Locations[0].Path())
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.ThenBy(data => data.Symbol.Locations[0].StartLine());
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foreach (var member in godotClassPropertiesAndFields)
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{
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foreach (var groupingInfo in DetermineGroupingPropertyInfo(member.Symbol))
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AppendGroupingPropertyInfo(source, groupingInfo);
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var propertyInfo = DeterminePropertyInfo(context, typeCache,
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member.Symbol, member.Type);
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if (propertyInfo == null)
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continue;
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AppendPropertyInfo(source, propertyInfo.Value);
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}
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source.Append(" return properties;\n");
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source.Append(" }\n");
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source.Append("#pragma warning restore CS0109\n");
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}
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source.Append("}\n"); // partial class
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if (isInnerClass)
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{
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var containingType = symbol.ContainingType;
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while (containingType != null)
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{
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source.Append("}\n"); // outer class
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containingType = containingType.ContainingType;
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}
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}
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if (hasNamespace)
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{
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source.Append("\n}\n");
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}
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context.AddSource(uniqueHint, SourceText.From(source.ToString(), Encoding.UTF8));
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}
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private static void GeneratePropertySetter(
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string propertyMemberName,
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ITypeSymbol propertyTypeSymbol,
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MarshalType propertyMarshalType,
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StringBuilder source,
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bool isFirstEntry
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)
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{
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source.Append(" ");
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if (!isFirstEntry)
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source.Append("else ");
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source.Append("if (name == PropertyName.")
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.Append(propertyMemberName)
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.Append(") {\n")
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.Append(" this.")
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.Append(propertyMemberName)
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.Append(" = ")
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.AppendNativeVariantToManagedExpr("value", propertyTypeSymbol, propertyMarshalType)
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.Append(";\n")
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.Append(" return true;\n")
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.Append(" }\n");
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}
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private static void GeneratePropertyGetter(
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string propertyMemberName,
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ITypeSymbol propertyTypeSymbol,
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MarshalType propertyMarshalType,
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StringBuilder source,
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bool isFirstEntry
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)
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{
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source.Append(" ");
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if (!isFirstEntry)
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source.Append("else ");
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source.Append("if (name == PropertyName.")
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.Append(propertyMemberName)
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.Append(") {\n")
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.Append(" value = ")
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.AppendManagedToNativeVariantExpr("this." + propertyMemberName,
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propertyTypeSymbol, propertyMarshalType)
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.Append(";\n")
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.Append(" return true;\n")
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.Append(" }\n");
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}
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private static void AppendGroupingPropertyInfo(StringBuilder source, PropertyInfo propertyInfo)
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{
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source.Append(" properties.Add(new(type: (Godot.Variant.Type)")
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.Append((int)VariantType.Nil)
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.Append(", name: \"")
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.Append(propertyInfo.Name)
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.Append("\", hint: (Godot.PropertyHint)")
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.Append((int)PropertyHint.None)
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.Append(", hintString: \"")
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.Append(propertyInfo.HintString)
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.Append("\", usage: (Godot.PropertyUsageFlags)")
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.Append((int)propertyInfo.Usage)
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.Append(", exported: true));\n");
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}
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private static void AppendPropertyInfo(StringBuilder source, PropertyInfo propertyInfo)
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{
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source.Append(" properties.Add(new(type: (global::Godot.Variant.Type)")
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.Append((int)propertyInfo.Type)
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.Append(", name: PropertyName.")
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.Append(propertyInfo.Name)
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.Append(", hint: (global::Godot.PropertyHint)")
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.Append((int)propertyInfo.Hint)
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.Append(", hintString: \"")
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.Append(propertyInfo.HintString)
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.Append("\", usage: (global::Godot.PropertyUsageFlags)")
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.Append((int)propertyInfo.Usage)
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.Append(", exported: ")
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.Append(propertyInfo.Exported ? "true" : "false")
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.Append("));\n");
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}
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private static IEnumerable<PropertyInfo> DetermineGroupingPropertyInfo(ISymbol memberSymbol)
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{
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foreach (var attr in memberSymbol.GetAttributes())
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{
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PropertyUsageFlags? propertyUsage = attr.AttributeClass?.ToString() switch
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{
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GodotClasses.ExportCategoryAttr => PropertyUsageFlags.Category,
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GodotClasses.ExportGroupAttr => PropertyUsageFlags.Group,
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GodotClasses.ExportSubgroupAttr => PropertyUsageFlags.Subgroup,
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_ => null
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};
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if (propertyUsage is null)
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continue;
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if (attr.ConstructorArguments.Length > 0 && attr.ConstructorArguments[0].Value is string name)
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{
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string? hintString = null;
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if (propertyUsage != PropertyUsageFlags.Category && attr.ConstructorArguments.Length > 1)
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hintString = attr.ConstructorArguments[1].Value?.ToString();
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yield return new PropertyInfo(VariantType.Nil, name, PropertyHint.None, hintString,
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propertyUsage.Value, true);
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}
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}
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}
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private static PropertyInfo? DeterminePropertyInfo(
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GeneratorExecutionContext context,
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MarshalUtils.TypeCache typeCache,
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ISymbol memberSymbol,
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MarshalType marshalType
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)
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{
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var exportAttr = memberSymbol.GetAttributes()
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.FirstOrDefault(a => a.AttributeClass?.IsGodotExportAttribute() ?? false);
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var propertySymbol = memberSymbol as IPropertySymbol;
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var fieldSymbol = memberSymbol as IFieldSymbol;
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if (exportAttr != null && propertySymbol != null)
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{
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if (propertySymbol.GetMethod == null)
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{
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// This should never happen, as we filtered WriteOnly properties, but just in case.
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Common.ReportExportedMemberIsWriteOnly(context, propertySymbol);
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return null;
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}
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if (propertySymbol.SetMethod == null || propertySymbol.SetMethod.IsInitOnly)
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{
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// This should never happen, as we filtered ReadOnly properties, but just in case.
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Common.ReportExportedMemberIsReadOnly(context, propertySymbol);
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return null;
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}
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}
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var memberType = propertySymbol?.Type ?? fieldSymbol!.Type;
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var memberVariantType = MarshalUtils.ConvertMarshalTypeToVariantType(marshalType)!.Value;
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string memberName = memberSymbol.Name;
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if (exportAttr == null)
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{
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return new PropertyInfo(memberVariantType, memberName, PropertyHint.None,
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hintString: null, PropertyUsageFlags.ScriptVariable, exported: false);
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}
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if (!TryGetMemberExportHint(typeCache, memberType, exportAttr, memberVariantType,
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isTypeArgument: false, out var hint, out var hintString))
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{
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var constructorArguments = exportAttr.ConstructorArguments;
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if (constructorArguments.Length > 0)
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{
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var hintValue = exportAttr.ConstructorArguments[0].Value;
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hint = hintValue switch
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{
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null => PropertyHint.None,
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int intValue => (PropertyHint)intValue,
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_ => (PropertyHint)(long)hintValue
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};
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hintString = constructorArguments.Length > 1 ?
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exportAttr.ConstructorArguments[1].Value?.ToString() :
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null;
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}
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else
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{
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hint = PropertyHint.None;
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}
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}
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var propUsage = PropertyUsageFlags.Default | PropertyUsageFlags.ScriptVariable;
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if (memberVariantType == VariantType.Nil)
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propUsage |= PropertyUsageFlags.NilIsVariant;
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return new PropertyInfo(memberVariantType, memberName,
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hint, hintString, propUsage, exported: true);
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}
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private static bool TryGetMemberExportHint(
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MarshalUtils.TypeCache typeCache,
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ITypeSymbol type, AttributeData exportAttr,
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VariantType variantType, bool isTypeArgument,
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out PropertyHint hint, out string? hintString
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)
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{
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hint = PropertyHint.None;
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hintString = null;
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if (variantType == VariantType.Nil)
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return true; // Variant, no export hint
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if (variantType == VariantType.Int &&
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type.IsValueType && type.TypeKind == TypeKind.Enum)
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{
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bool hasFlagsAttr = type.GetAttributes()
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.Any(a => a.AttributeClass?.IsSystemFlagsAttribute() ?? false);
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hint = hasFlagsAttr ? PropertyHint.Flags : PropertyHint.Enum;
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var members = type.GetMembers();
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var enumFields = members
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.Where(s => s.Kind == SymbolKind.Field && s.IsStatic &&
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s.DeclaredAccessibility == Accessibility.Public &&
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!s.IsImplicitlyDeclared)
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.Cast<IFieldSymbol>().ToArray();
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var hintStringBuilder = new StringBuilder();
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var nameOnlyHintStringBuilder = new StringBuilder();
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// True: enum Foo { Bar, Baz, Qux }
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// True: enum Foo { Bar = 0, Baz = 1, Qux = 2 }
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// False: enum Foo { Bar = 0, Baz = 7, Qux = 5 }
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bool usesDefaultValues = true;
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for (int i = 0; i < enumFields.Length; i++)
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{
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var enumField = enumFields[i];
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if (i > 0)
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{
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hintStringBuilder.Append(",");
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nameOnlyHintStringBuilder.Append(",");
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}
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string enumFieldName = enumField.Name;
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hintStringBuilder.Append(enumFieldName);
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nameOnlyHintStringBuilder.Append(enumFieldName);
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long val = enumField.ConstantValue switch
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{
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sbyte v => v,
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short v => v,
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int v => v,
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long v => v,
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byte v => v,
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ushort v => v,
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uint v => v,
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ulong v => (long)v,
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_ => 0
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};
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uint expectedVal = (uint)(hint == PropertyHint.Flags ? 1 << i : i);
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if (val != expectedVal)
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usesDefaultValues = false;
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hintStringBuilder.Append(":");
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hintStringBuilder.Append(val);
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}
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hintString = !usesDefaultValues ?
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hintStringBuilder.ToString() :
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// If we use the format NAME:VAL, that's what the editor displays.
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// That's annoying if the user is not using custom values for the enum constants.
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// This may not be needed in the future if the editor is changed to not display values.
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nameOnlyHintStringBuilder.ToString();
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return true;
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}
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if (variantType == VariantType.Object && type is INamedTypeSymbol memberNamedType)
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{
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if (memberNamedType.InheritsFrom("GodotSharp", "Godot.Resource"))
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{
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string nativeTypeName = memberNamedType.GetGodotScriptNativeClassName()!;
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hint = PropertyHint.ResourceType;
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hintString = nativeTypeName;
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return true;
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}
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if (memberNamedType.InheritsFrom("GodotSharp", "Godot.Node"))
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|
{
|
|
string nativeTypeName = memberNamedType.GetGodotScriptNativeClassName()!;
|
|
|
|
hint = PropertyHint.NodeType;
|
|
hintString = nativeTypeName;
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
static bool GetStringArrayEnumHint(VariantType elementVariantType,
|
|
AttributeData exportAttr, out string? hintString)
|
|
{
|
|
var constructorArguments = exportAttr.ConstructorArguments;
|
|
|
|
if (constructorArguments.Length > 0)
|
|
{
|
|
var presetHintValue = exportAttr.ConstructorArguments[0].Value;
|
|
|
|
PropertyHint presetHint = presetHintValue switch
|
|
{
|
|
null => PropertyHint.None,
|
|
int intValue => (PropertyHint)intValue,
|
|
_ => (PropertyHint)(long)presetHintValue
|
|
};
|
|
|
|
if (presetHint == PropertyHint.Enum)
|
|
{
|
|
string? presetHintString = constructorArguments.Length > 1 ?
|
|
exportAttr.ConstructorArguments[1].Value?.ToString() :
|
|
null;
|
|
|
|
hintString = (int)elementVariantType + "/" + (int)PropertyHint.Enum + ":";
|
|
|
|
if (presetHintString != null)
|
|
hintString += presetHintString;
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
hintString = null;
|
|
return false;
|
|
}
|
|
|
|
if (!isTypeArgument && variantType == VariantType.Array)
|
|
{
|
|
var elementType = MarshalUtils.GetArrayElementType(type);
|
|
|
|
if (elementType == null)
|
|
return false; // Non-generic Array, so there's no hint to add
|
|
|
|
var elementMarshalType = MarshalUtils.ConvertManagedTypeToMarshalType(elementType, typeCache)!.Value;
|
|
var elementVariantType = MarshalUtils.ConvertMarshalTypeToVariantType(elementMarshalType)!.Value;
|
|
|
|
bool isPresetHint = false;
|
|
|
|
if (elementVariantType == VariantType.String)
|
|
isPresetHint = GetStringArrayEnumHint(elementVariantType, exportAttr, out hintString);
|
|
|
|
if (!isPresetHint)
|
|
{
|
|
bool hintRes = TryGetMemberExportHint(typeCache, elementType,
|
|
exportAttr, elementVariantType, isTypeArgument: true,
|
|
out var elementHint, out var elementHintString);
|
|
|
|
// Format: type/hint:hint_string
|
|
if (hintRes)
|
|
{
|
|
hintString = (int)elementVariantType + "/" + (int)elementHint + ":";
|
|
|
|
if (elementHintString != null)
|
|
hintString += elementHintString;
|
|
}
|
|
else
|
|
{
|
|
hintString = (int)elementVariantType + "/" + (int)PropertyHint.None + ":";
|
|
}
|
|
}
|
|
|
|
hint = PropertyHint.TypeString;
|
|
|
|
return hintString != null;
|
|
}
|
|
|
|
if (!isTypeArgument && variantType == VariantType.PackedStringArray)
|
|
{
|
|
if (GetStringArrayEnumHint(VariantType.String, exportAttr, out hintString))
|
|
{
|
|
hint = PropertyHint.TypeString;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (!isTypeArgument && variantType == VariantType.Dictionary)
|
|
{
|
|
// TODO: Dictionaries are not supported in the inspector
|
|
return false;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|
|
}
|