using System;
using System.Linq;
using System.Text;
using Microsoft.CodeAnalysis;
namespace Godot.SourceGenerators
{
internal static class MarshalUtils
{
public class TypeCache
{
public INamedTypeSymbol GodotObjectType { get; }
public TypeCache(Compilation compilation)
{
INamedTypeSymbol GetTypeByMetadataNameOrThrow(string fullyQualifiedMetadataName)
{
return compilation.GetTypeByMetadataName(fullyQualifiedMetadataName) ??
throw new InvalidOperationException($"Type not found: '{fullyQualifiedMetadataName}'.");
}
GodotObjectType = GetTypeByMetadataNameOrThrow(GodotClasses.GodotObject);
}
}
public static VariantType? ConvertMarshalTypeToVariantType(MarshalType marshalType)
=> marshalType switch
{
MarshalType.Boolean => VariantType.Bool,
MarshalType.Char => VariantType.Int,
MarshalType.SByte => VariantType.Int,
MarshalType.Int16 => VariantType.Int,
MarshalType.Int32 => VariantType.Int,
MarshalType.Int64 => VariantType.Int,
MarshalType.Byte => VariantType.Int,
MarshalType.UInt16 => VariantType.Int,
MarshalType.UInt32 => VariantType.Int,
MarshalType.UInt64 => VariantType.Int,
MarshalType.Single => VariantType.Float,
MarshalType.Double => VariantType.Float,
MarshalType.String => VariantType.String,
MarshalType.Vector2 => VariantType.Vector2,
MarshalType.Vector2I => VariantType.Vector2I,
MarshalType.Rect2 => VariantType.Rect2,
MarshalType.Rect2I => VariantType.Rect2I,
MarshalType.Transform2D => VariantType.Transform2D,
MarshalType.Vector3 => VariantType.Vector3,
MarshalType.Vector3I => VariantType.Vector3I,
MarshalType.Basis => VariantType.Basis,
MarshalType.Quaternion => VariantType.Quaternion,
MarshalType.Transform3D => VariantType.Transform3D,
MarshalType.Vector4 => VariantType.Vector4,
MarshalType.Vector4I => VariantType.Vector4I,
MarshalType.Projection => VariantType.Projection,
MarshalType.Aabb => VariantType.Aabb,
MarshalType.Color => VariantType.Color,
MarshalType.Plane => VariantType.Plane,
MarshalType.Callable => VariantType.Callable,
MarshalType.Signal => VariantType.Signal,
MarshalType.Enum => VariantType.Int,
MarshalType.ByteArray => VariantType.PackedByteArray,
MarshalType.Int32Array => VariantType.PackedInt32Array,
MarshalType.Int64Array => VariantType.PackedInt64Array,
MarshalType.Float32Array => VariantType.PackedFloat32Array,
MarshalType.Float64Array => VariantType.PackedFloat64Array,
MarshalType.StringArray => VariantType.PackedStringArray,
MarshalType.Vector2Array => VariantType.PackedVector2Array,
MarshalType.Vector3Array => VariantType.PackedVector3Array,
MarshalType.Vector4Array => VariantType.PackedVector4Array,
MarshalType.ColorArray => VariantType.PackedColorArray,
MarshalType.GodotObjectOrDerivedArray => VariantType.Array,
MarshalType.SystemArrayOfStringName => VariantType.Array,
MarshalType.SystemArrayOfNodePath => VariantType.Array,
MarshalType.SystemArrayOfRid => VariantType.Array,
MarshalType.Variant => VariantType.Nil,
MarshalType.GodotObjectOrDerived => VariantType.Object,
MarshalType.StringName => VariantType.StringName,
MarshalType.NodePath => VariantType.NodePath,
MarshalType.Rid => VariantType.Rid,
MarshalType.GodotDictionary => VariantType.Dictionary,
MarshalType.GodotArray => VariantType.Array,
MarshalType.GodotGenericDictionary => VariantType.Dictionary,
MarshalType.GodotGenericArray => VariantType.Array,
_ => null
};
public static MarshalType? ConvertManagedTypeToMarshalType(ITypeSymbol type, TypeCache typeCache)
{
var specialType = type.SpecialType;
switch (specialType)
{
case SpecialType.System_Boolean:
return MarshalType.Boolean;
case SpecialType.System_Char:
return MarshalType.Char;
case SpecialType.System_SByte:
return MarshalType.SByte;
case SpecialType.System_Int16:
return MarshalType.Int16;
case SpecialType.System_Int32:
return MarshalType.Int32;
case SpecialType.System_Int64:
return MarshalType.Int64;
case SpecialType.System_Byte:
return MarshalType.Byte;
case SpecialType.System_UInt16:
return MarshalType.UInt16;
case SpecialType.System_UInt32:
return MarshalType.UInt32;
case SpecialType.System_UInt64:
return MarshalType.UInt64;
case SpecialType.System_Single:
return MarshalType.Single;
case SpecialType.System_Double:
return MarshalType.Double;
case SpecialType.System_String:
return MarshalType.String;
default:
{
var typeKind = type.TypeKind;
if (typeKind == TypeKind.Enum)
return MarshalType.Enum;
if (typeKind == TypeKind.Struct)
{
if (type.ContainingAssembly?.Name == "GodotSharp" &&
type.ContainingNamespace?.Name == "Godot")
{
return type switch
{
{ Name: "Vector2" } => MarshalType.Vector2,
{ Name: "Vector2I" } => MarshalType.Vector2I,
{ Name: "Rect2" } => MarshalType.Rect2,
{ Name: "Rect2I" } => MarshalType.Rect2I,
{ Name: "Transform2D" } => MarshalType.Transform2D,
{ Name: "Vector3" } => MarshalType.Vector3,
{ Name: "Vector3I" } => MarshalType.Vector3I,
{ Name: "Basis" } => MarshalType.Basis,
{ Name: "Quaternion" } => MarshalType.Quaternion,
{ Name: "Transform3D" } => MarshalType.Transform3D,
{ Name: "Vector4" } => MarshalType.Vector4,
{ Name: "Vector4I" } => MarshalType.Vector4I,
{ Name: "Projection" } => MarshalType.Projection,
{ Name: "Aabb" } => MarshalType.Aabb,
{ Name: "Color" } => MarshalType.Color,
{ Name: "Plane" } => MarshalType.Plane,
{ Name: "Rid" } => MarshalType.Rid,
{ Name: "Callable" } => MarshalType.Callable,
{ Name: "Signal" } => MarshalType.Signal,
{ Name: "Variant" } => MarshalType.Variant,
_ => null
};
}
}
else if (typeKind == TypeKind.Array)
{
var arrayType = (IArrayTypeSymbol)type;
if (arrayType.Rank != 1)
return null;
var elementType = arrayType.ElementType;
switch (elementType.SpecialType)
{
case SpecialType.System_Byte:
return MarshalType.ByteArray;
case SpecialType.System_Int32:
return MarshalType.Int32Array;
case SpecialType.System_Int64:
return MarshalType.Int64Array;
case SpecialType.System_Single:
return MarshalType.Float32Array;
case SpecialType.System_Double:
return MarshalType.Float64Array;
case SpecialType.System_String:
return MarshalType.StringArray;
}
if (elementType.SimpleDerivesFrom(typeCache.GodotObjectType))
return MarshalType.GodotObjectOrDerivedArray;
if (elementType.ContainingAssembly?.Name == "GodotSharp" &&
elementType.ContainingNamespace?.Name == "Godot")
{
switch (elementType)
{
case { Name: "Vector2" }:
return MarshalType.Vector2Array;
case { Name: "Vector3" }:
return MarshalType.Vector3Array;
case { Name: "Vector4" }:
return MarshalType.Vector4Array;
case { Name: "Color" }:
return MarshalType.ColorArray;
case { Name: "StringName" }:
return MarshalType.SystemArrayOfStringName;
case { Name: "NodePath" }:
return MarshalType.SystemArrayOfNodePath;
case { Name: "Rid" }:
return MarshalType.SystemArrayOfRid;
}
}
return null;
}
else
{
if (type.SimpleDerivesFrom(typeCache.GodotObjectType))
return MarshalType.GodotObjectOrDerived;
if (type.ContainingAssembly?.Name == "GodotSharp")
{
switch (type.ContainingNamespace?.Name)
{
case "Godot":
return type switch
{
{ Name: "StringName" } => MarshalType.StringName,
{ Name: "NodePath" } => MarshalType.NodePath,
_ => null
};
case "Collections"
when type.ContainingNamespace?.FullQualifiedNameOmitGlobal() == "Godot.Collections":
return type switch
{
{ Name: "Dictionary" } =>
type is INamedTypeSymbol { IsGenericType: false } ?
MarshalType.GodotDictionary :
MarshalType.GodotGenericDictionary,
{ Name: "Array" } =>
type is INamedTypeSymbol { IsGenericType: false } ?
MarshalType.GodotArray :
MarshalType.GodotGenericArray,
_ => null
};
}
}
}
break;
}
}
return null;
}
private static bool SimpleDerivesFrom(this ITypeSymbol? type, ITypeSymbol candidateBaseType)
{
while (type != null)
{
if (SymbolEqualityComparer.Default.Equals(type, candidateBaseType))
return true;
type = type.BaseType;
}
return false;
}
public static ITypeSymbol? GetArrayElementType(ITypeSymbol typeSymbol)
{
if (typeSymbol.TypeKind == TypeKind.Array)
{
var arrayType = (IArrayTypeSymbol)typeSymbol;
return arrayType.ElementType;
}
if (typeSymbol is INamedTypeSymbol { IsGenericType: true } genericType)
return genericType.TypeArguments.FirstOrDefault();
return null;
}
public static ITypeSymbol[]? GetGenericElementTypes(ITypeSymbol typeSymbol)
{
if (typeSymbol is INamedTypeSymbol { IsGenericType: true } genericType)
return genericType.TypeArguments.ToArray();
return null;
}
private static StringBuilder Append(this StringBuilder source, string a, string b)
=> source.Append(a).Append(b);
private static StringBuilder Append(this StringBuilder source, string a, string b, string c)
=> source.Append(a).Append(b).Append(c);
private static StringBuilder Append(this StringBuilder source, string a, string b,
string c, string d)
=> source.Append(a).Append(b).Append(c).Append(d);
private static StringBuilder Append(this StringBuilder source, string a, string b,
string c, string d, string e)
=> source.Append(a).Append(b).Append(c).Append(d).Append(e);
private static StringBuilder Append(this StringBuilder source, string a, string b,
string c, string d, string e, string f)
=> source.Append(a).Append(b).Append(c).Append(d).Append(e).Append(f);
private static StringBuilder Append(this StringBuilder source, string a, string b,
string c, string d, string e, string f, string g)
=> source.Append(a).Append(b).Append(c).Append(d).Append(e).Append(f).Append(g);
private static StringBuilder Append(this StringBuilder source, string a, string b,
string c, string d, string e, string f, string g, string h)
=> source.Append(a).Append(b).Append(c).Append(d).Append(e).Append(f).Append(g).Append(h);
private const string VariantUtils = "global::Godot.NativeInterop.VariantUtils";
public static StringBuilder AppendNativeVariantToManagedExpr(this StringBuilder source,
string inputExpr, ITypeSymbol typeSymbol, MarshalType marshalType)
{
return marshalType switch
{
// We need a special case for GodotObjectOrDerived[], because it's not supported by VariantUtils.ConvertTo<T>
MarshalType.GodotObjectOrDerivedArray =>
source.Append(VariantUtils, ".ConvertToSystemArrayOfGodotObject<",
((IArrayTypeSymbol)typeSymbol).ElementType.FullQualifiedNameIncludeGlobal(), ">(",
inputExpr, ")"),
// We need a special case for generic Godot collections and GodotObjectOrDerived[], because VariantUtils.ConvertTo<T> is slower
MarshalType.GodotGenericDictionary =>
source.Append(VariantUtils, ".ConvertToDictionary<",
((INamedTypeSymbol)typeSymbol).TypeArguments[0].FullQualifiedNameIncludeGlobal(), ", ",
((INamedTypeSymbol)typeSymbol).TypeArguments[1].FullQualifiedNameIncludeGlobal(), ">(",
inputExpr, ")"),
MarshalType.GodotGenericArray =>
source.Append(VariantUtils, ".ConvertToArray<",
((INamedTypeSymbol)typeSymbol).TypeArguments[0].FullQualifiedNameIncludeGlobal(), ">(",
inputExpr, ")"),
_ => source.Append(VariantUtils, ".ConvertTo<",
typeSymbol.FullQualifiedNameIncludeGlobal(), ">(", inputExpr, ")"),
};
}
public static StringBuilder AppendManagedToNativeVariantExpr(this StringBuilder source,
string inputExpr, ITypeSymbol typeSymbol, MarshalType marshalType)
{
return marshalType switch
{
// We need a special case for GodotObjectOrDerived[], because it's not supported by VariantUtils.CreateFrom<T>
MarshalType.GodotObjectOrDerivedArray =>
source.Append(VariantUtils, ".CreateFromSystemArrayOfGodotObject(", inputExpr, ")"),
// We need a special case for generic Godot collections and GodotObjectOrDerived[], because VariantUtils.CreateFrom<T> is slower
MarshalType.GodotGenericDictionary =>
source.Append(VariantUtils, ".CreateFromDictionary(", inputExpr, ")"),
MarshalType.GodotGenericArray =>
source.Append(VariantUtils, ".CreateFromArray(", inputExpr, ")"),
_ => source.Append(VariantUtils, ".CreateFrom<",
typeSymbol.FullQualifiedNameIncludeGlobal(), ">(", inputExpr, ")"),
};
}
public static StringBuilder AppendVariantToManagedExpr(this StringBuilder source,
string inputExpr, ITypeSymbol typeSymbol, MarshalType marshalType)
{
return marshalType switch
{
// We need a special case for GodotObjectOrDerived[], because it's not supported by Variant.As<T>
MarshalType.GodotObjectOrDerivedArray =>
source.Append(inputExpr, ".AsGodotObjectArray<",
((IArrayTypeSymbol)typeSymbol).ElementType.FullQualifiedNameIncludeGlobal(), ">()"),
// We need a special case for generic Godot collections and GodotObjectOrDerived[], because Variant.As<T> is slower
MarshalType.GodotGenericDictionary =>
source.Append(inputExpr, ".AsGodotDictionary<",
((INamedTypeSymbol)typeSymbol).TypeArguments[0].FullQualifiedNameIncludeGlobal(), ", ",
((INamedTypeSymbol)typeSymbol).TypeArguments[1].FullQualifiedNameIncludeGlobal(), ">()"),
MarshalType.GodotGenericArray =>
source.Append(inputExpr, ".AsGodotArray<",
((INamedTypeSymbol)typeSymbol).TypeArguments[0].FullQualifiedNameIncludeGlobal(), ">()"),
_ => source.Append(inputExpr, ".As<",
typeSymbol.FullQualifiedNameIncludeGlobal(), ">()")
};
}
public static StringBuilder AppendManagedToVariantExpr(this StringBuilder source,
string inputExpr, ITypeSymbol typeSymbol, MarshalType marshalType)
{
return marshalType switch
{
// We need a special case for GodotObjectOrDerived[], because it's not supported by Variant.From<T>
MarshalType.GodotObjectOrDerivedArray =>
source.Append("global::Godot.Variant.CreateFrom(", inputExpr, ")"),
// We need a special case for generic Godot collections, because Variant.From<T> is slower
MarshalType.GodotGenericDictionary or MarshalType.GodotGenericArray =>
source.Append("global::Godot.Variant.CreateFrom(", inputExpr, ")"),
_ => source.Append("global::Godot.Variant.From<",
typeSymbol.FullQualifiedNameIncludeGlobal(), ">(", inputExpr, ")")
};
}
}
}
Codebase Browser
godot