Support opaque untyped records

src/Generation/Generator/Generator/Internal/OpaqueUntypedRecord.cs

@@ -0,0 +1,29 @@
+using Generator.Model;
+
+namespace Generator.Generator.Internal;
+
+internal class OpaqueUntypedRecord : Generator<GirModel.Record>
+{
+    private readonly Publisher _publisher;
+
+    public OpaqueUntypedRecord(Publisher publisher)
+    {
+        _publisher = publisher;
+    }
+
+    public void Generate(GirModel.Record obj)
+    {
+        if (!Record.IsOpaqueUntyped(obj))
+            return;
+
+        var source = Renderer.Internal.OpaqueUntypedRecord.Render(obj);
+        var codeUnit = new CodeUnit(
+            Project: Namespace.GetCanonicalName(obj.Namespace),
+            Name: obj.Name,
+            Source: source,
+            IsInternal: true
+        );
+
+        _publisher.Publish(codeUnit);
+    }
+}

src/Generation/Generator/Generator/Internal/OpaqueUntypedRecordHandle.cs

@@ -0,0 +1,29 @@
+using Generator.Model;
+
+namespace Generator.Generator.Internal;
+
+internal class OpaqueUntypedRecordHandle : Generator<GirModel.Record>
+{
+    private readonly Publisher _publisher;
+
+    public OpaqueUntypedRecordHandle(Publisher publisher)
+    {
+        _publisher = publisher;
+    }
+
+    public void Generate(GirModel.Record obj)
+    {
+        if (!Record.IsOpaqueUntyped(obj))
+            return;
+
+        var source = Renderer.Internal.OpaqueUntypedRecordHandle.Render(obj);
+        var codeUnit = new CodeUnit(
+            Project: Namespace.GetCanonicalName(obj.Namespace),
+            Name: Model.OpaqueTypedRecord.GetInternalHandle(obj),
+            Source: source,
+            IsInternal: true
+        );
+
+        _publisher.Publish(codeUnit);
+    }
+}

src/Generation/Generator/Generator/Public/OpaqueUntypedRecord.cs

@@ -0,0 +1,29 @@
+using Generator.Model;
+
+namespace Generator.Generator.Public;
+
+internal class OpaqueUntypedRecord : Generator<GirModel.Record>
+{
+    private readonly Publisher _publisher;
+
+    public OpaqueUntypedRecord(Publisher publisher)
+    {
+        _publisher = publisher;
+    }
+
+    public void Generate(GirModel.Record record)
+    {
+        if (!Record.IsOpaqueUntyped(record))
+            return;
+
+        var source = Renderer.Public.OpaqueUntypedRecord.Render(record);
+        var codeUnit = new CodeUnit(
+            Project: Namespace.GetCanonicalName(record.Namespace),
+            Name: Record.GetPublicClassName(record),
+            Source: source,
+            IsInternal: false
+        );
+
+        _publisher.Publish(codeUnit);
+    }
+}

src/Generation/Generator/Model/OpaqueUntypedRecord.cs

@@ -0,0 +1,34 @@
+namespace Generator.Model;
+
+internal static class OpaqueUntypedRecord
+{
+    public static string GetPublicClassName(GirModel.Record record)
+        => record.Name;
+
+    public static string GetFullyQualifiedPublicClassName(GirModel.Record record)
+        => Namespace.GetPublicName(record.Namespace) + "." + GetPublicClassName(record);
+
+    public static string GetFullyQualifiedInternalClassName(GirModel.Record record)
+        => Namespace.GetInternalName(record.Namespace) + "." + record.Name;
+
+    public static string GetInternalHandle(GirModel.Record record)
+        => $"{Type.GetName(record)}Handle";
+
+    public static string GetInternalOwnedHandle(GirModel.Record record)
+        => $"{Type.GetName(record)}OwnedHandle";
+
+    public static string GetInternalUnownedHandle(GirModel.Record record)
+        => $"{Type.GetName(record)}UnownedHandle";
+
+    public static string GetFullyQuallifiedInternalHandle(GirModel.Record record)
+        => $"{Namespace.GetInternalName(record.Namespace)}.{GetInternalHandle(record)}";
+
+    public static string GetFullyQuallifiedOwnedHandle(GirModel.Record record)
+        => $"{Namespace.GetInternalName(record.Namespace)}.{GetInternalOwnedHandle(record)}";
+
+    public static string GetFullyQuallifiedUnownedHandle(GirModel.Record record)
+        => $"{Namespace.GetInternalName(record.Namespace)}.{GetInternalUnownedHandle(record)}";
+
+    public static string GetFullyQuallifiedNullHandle(GirModel.Record record)
+        => $"{Namespace.GetInternalName(record.Namespace)}.{GetInternalUnownedHandle(record)}.NullHandle";
+}

src/Generation/Generator/Model/Record.cs

@@ -4,7 +4,7 @@ internal static partial class Record
 {
     public static bool IsStandard(GirModel.Record record)
     {
-        return !IsOpaqueTyped(record);
+        return !IsOpaqueTyped(record) && !IsOpaqueUntyped(record);
     }
 
     public static bool IsOpaqueTyped(GirModel.Record record)
@@ -14,6 +14,13 @@ public static bool IsOpaqueTyped(GirModel.Record record)
         //record is actually fundamental and does not have a type function.
         return record is { Opaque: true, TypeFunction.CIdentifier: not "intern" };
     }
+
+    public static bool IsOpaqueUntyped(GirModel.Record record)
+    {
+        //A CIdentifier "intern" means that this type is fundamental and can be treated as
+        //untyped.
+        return record is { Opaque: true, TypeFunction: null or { CIdentifier: "intern"} };
+    }
 
     public static string GetFullyQualifiedInternalStructName(GirModel.Record record)
         => Namespace.GetInternalName(record.Namespace) + "." + GetInternalStructName(record);

src/Generation/Generator/Records.cs

@@ -17,6 +17,11 @@ public static void Generate(IEnumerable<GirModel.Record> records, string path)
             new Generator.Internal.OpaqueTypedRecordHandle(publisher),
             new Generator.Public.OpaqueTypedRecord(publisher),
 
+            //Opaque untyped records
+            new Generator.Internal.OpaqueUntypedRecord(publisher),
+            new Generator.Internal.OpaqueUntypedRecordHandle(publisher),
+            new Generator.Public.OpaqueUntypedRecord(publisher),
+
             //Regular records
             new Generator.Internal.RecordDelegates(publisher),
             new Generator.Internal.RecordHandle(publisher),

src/Generation/Generator/Renderer/Internal/InstanceParameter/Converter/OpaqueUntypedRecord.cs

@@ -0,0 +1,28 @@
+namespace Generator.Renderer.Internal.InstanceParameter;
+
+internal class OpaqueUntypedRecord : InstanceParameterConverter
+{
+    public bool Supports(GirModel.Type type)
+    {
+        return type is GirModel.Record r && Model.Record.IsOpaqueUntyped(r);
+    }
+
+    public RenderableInstanceParameter Convert(GirModel.InstanceParameter instanceParameter)
+    {
+        return new RenderableInstanceParameter(
+            Name: Model.InstanceParameter.GetName(instanceParameter),
+            NullableTypeName: GetNullableTypeName(instanceParameter)
+        );
+    }
+
+    private static string GetNullableTypeName(GirModel.InstanceParameter instanceParameter)
+    {
+        var type = (GirModel.Record) instanceParameter.Type;
+        return instanceParameter switch
+        {
+            { Direction: GirModel.Direction.In, Transfer: GirModel.Transfer.None } => Model.OpaqueUntypedRecord.GetFullyQuallifiedInternalHandle(type),
+            { Direction: GirModel.Direction.In, Transfer: GirModel.Transfer.Full } => Model.OpaqueUntypedRecord.GetFullyQuallifiedUnownedHandle(type),
+            _ => throw new System.Exception($"Can't detect opaque untyped record instance parameter type {instanceParameter.Name}: CallerAllocates={instanceParameter.CallerAllocates} Direction={instanceParameter.Direction} Transfer={instanceParameter.Transfer}")
+        };
+    }
+}

src/Generation/Generator/Renderer/Internal/InstanceParameter/InstanceParameters.cs

@@ -10,6 +10,7 @@ internal static class InstanceParameters
         new InstanceParameter.Class(),
         new InstanceParameter.Interface(),
         new InstanceParameter.OpaqueTypedRecord(),
+        new InstanceParameter.OpaqueUntypedRecord(),
         new InstanceParameter.Pointer(),
         new InstanceParameter.Record(),
         new InstanceParameter.Union()

src/Generation/Generator/Renderer/Internal/OpaqueUntypedRecord.cs

@@ -0,0 +1,29 @@
+using Generator.Model;
+
+namespace Generator.Renderer.Internal;
+
+internal static class OpaqueUntypedRecord
+{
+    public static string Render(GirModel.Record record)
+    {
+        return $@"
+using System;
+using GObject;
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+
+#nullable enable
+
+namespace {Namespace.GetInternalName(record.Namespace)};
+
+// AUTOGENERATED FILE - DO NOT MODIFY
+
+{PlatformSupportAttribute.Render(record as GirModel.PlatformDependent)}
+public partial class {record.Name}
+{{
+    {Constructors.Render(record.Constructors)}
+    {Functions.Render(record.Functions)}
+    {Methods.Render(record.Methods)}
+}}";
+    }
+}

src/Generation/Generator/Renderer/Internal/OpaqueUntypedRecordHandle.cs

@@ -0,0 +1,68 @@
+using Generator.Model;
+
+namespace Generator.Renderer.Internal;
+
+internal static class OpaqueUntypedRecordHandle
+{
+    public static string Render(GirModel.Record record)
+    {
+        var typeName = Model.OpaqueUntypedRecord.GetInternalHandle(record);
+        var unownedHandleTypeName = Model.OpaqueUntypedRecord.GetInternalUnownedHandle(record);
+        var ownedHandleTypeName = Model.OpaqueUntypedRecord.GetInternalOwnedHandle(record);
+
+        return $@"using System;
+using GObject;
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+
+#nullable enable
+
+namespace {Namespace.GetInternalName(record.Namespace)};
+
+// AUTOGENERATED FILE - DO NOT MODIFY
+
+{PlatformSupportAttribute.Render(record as GirModel.PlatformDependent)}
+public abstract partial class {typeName} : SafeHandle
+{{    
+    public sealed override bool IsInvalid => handle == IntPtr.Zero;
+
+    protected {typeName}(bool ownsHandle) : base(IntPtr.Zero, ownsHandle) {{ }}
+
+    public partial {ownedHandleTypeName} OwnedCopy();
+    public partial {unownedHandleTypeName} UnownedCopy();
+}}
+
+public class {unownedHandleTypeName} : {typeName}
+{{
+    private static {unownedHandleTypeName}? nullHandle;
+    public static {unownedHandleTypeName} NullHandle => nullHandle ??= new {unownedHandleTypeName}();
+
+    /// <summary>
+    /// Creates a new instance of {unownedHandleTypeName}. Used automatically by PInvoke.
+    /// </summary>
+    internal {unownedHandleTypeName}() : base(false) {{ }}
+
+    protected override bool ReleaseHandle()
+    {{
+        throw new Exception(""UnownedHandle must not be freed"");
+    }}
+}}
+
+public partial class {ownedHandleTypeName} : {typeName}
+{{
+    /// <summary>
+    /// Creates a new instance of {ownedHandleTypeName}. Used automatically by PInvoke.
+    /// </summary>
+    internal {ownedHandleTypeName}() : base(true) {{ }}
+
+    /// <summary>
+    /// Create a {ownedHandleTypeName} from a pointer that is assumed unowned.
+    /// </summary>
+    /// <param name=""ptr"">A pointer to a {record.Name} which is not owned by the runtime.</param>
+    /// <returns>A {ownedHandleTypeName}</returns>
+    public static partial {ownedHandleTypeName} FromUnowned(IntPtr ptr);
+
+    protected override partial bool ReleaseHandle();
+}}";
+    }
+}

src/Generation/Generator/Renderer/Internal/Parameter/CallbackParameters.cs

@@ -17,6 +17,7 @@ internal static class CallbackParameters
         new Parameter.InterfaceArray(),
         new Parameter.NativeUnsignedIntegerArray(),
         new Parameter.OpaqueTypedRecordCallback(),
+        new Parameter.OpaqueUntypedRecordCallback(),
         new Parameter.Pointer(),
         new Parameter.PointerAlias(),
         new Parameter.PointerArray(),

src/Generation/Generator/Renderer/Internal/Parameter/Converter/OpaqueUntypedRecord.cs

@@ -0,0 +1,41 @@
+using System;
+
+namespace Generator.Renderer.Internal.Parameter;
+
+internal class OpaqueUntypedRecord : ParameterConverter
+{
+    public bool Supports(GirModel.AnyType anyType)
+    {
+        return anyType.Is<GirModel.Record>(out var record) && Model.Record.IsOpaqueUntyped(record);
+    }
+
+    public RenderableParameter Convert(GirModel.Parameter parameter)
+    {
+        return new RenderableParameter(
+            Attribute: string.Empty,
+            Direction: GetDirection(parameter),
+            NullableTypeName: GetNullableTypeName(parameter),
+            Name: Model.Parameter.GetName(parameter)
+        );
+    }
+
+    private static string GetNullableTypeName(GirModel.Parameter parameter)
+    {
+        //Native opaque records are represented as SafeHandles and are not nullable
+
+        var type = (GirModel.Record) parameter.AnyTypeOrVarArgs.AsT0.AsT0;
+        return parameter switch
+        {
+            { Direction: GirModel.Direction.In, Transfer: GirModel.Transfer.None } => Model.OpaqueUntypedRecord.GetFullyQuallifiedInternalHandle(type),
+            { Direction: GirModel.Direction.In, Transfer: GirModel.Transfer.Full } => Model.OpaqueUntypedRecord.GetFullyQuallifiedUnownedHandle(type),
+            _ => throw new Exception($"Can't detect opaque untyped record parameter type {parameter.Name}: CallerAllocates={parameter.CallerAllocates} Direction={parameter.Direction} Transfer={parameter.Transfer}")
+        };
+    }
+
+    private static string GetDirection(GirModel.Parameter parameter) => parameter switch
+    {
+        { Direction: GirModel.Direction.In } => ParameterDirection.In(),
+        { Direction: GirModel.Direction.InOut } => ParameterDirection.In(),
+        _ => throw new Exception($"Unknown parameter direction for opaque untyped record parameter {parameter.Name}")
+    };
+}

src/Generation/Generator/Renderer/Internal/Parameter/Converter/OpaqueUntypedRecordArray.cs

@@ -0,0 +1,27 @@
+using System;
+
+namespace Generator.Renderer.Internal.Parameter;
+
+internal class OpaqueUntypedRecordArray : ParameterConverter
+{
+    public bool Supports(GirModel.AnyType anyType)
+    {
+        return anyType.IsArray<GirModel.Record>(out var record) && Model.Record.IsOpaqueUntyped(record);
+    }
+
+    public RenderableParameter Convert(GirModel.Parameter parameter)
+    {
+        if (!parameter.AnyTypeOrVarArgs.AsT0.AsT1.IsPointer)
+        {
+            var record = (GirModel.Record) parameter.AnyTypeOrVarArgs.AsT0.AsT1.AnyType.AsT0;
+            throw new Exception($"Unpointed opaque untyped record array of type {record.Name} not yet supported");
+        }
+
+        return new RenderableParameter(
+            Attribute: string.Empty,
+            Direction: string.Empty,
+            NullableTypeName: $"ref {Model.Type.Pointer}",
+            Name: Model.Parameter.GetName(parameter)
+        );
+    }
+}