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C#: Generate On{EventName} method to raise signal events

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This commit is contained in:
Raul Santos
2022-11-03 20:10:33 +01:00
parent 445e822bcf
commit da37998dc8
3 changed files with 81 additions and 7 deletions
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44
modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/ScriptSignalsGenerator.cs
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@@ -5,13 +5,6 @@ using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Text;
// TODO:
// Determine a proper way to emit the signal.
// 'Emit(nameof(TheEvent))' creates a StringName every time and has the overhead of string marshaling.
// I haven't decided on the best option yet. Some possibilities:
// - Expose the generated StringName fields to the user, for use with 'Emit(...)'.
// - Generate a 'EmitSignalName' method for each event signal.
namespace Godot.SourceGenerators
{
[Generator]
@@ -288,6 +281,43 @@ namespace Godot.SourceGenerators
.Append(signalName)
.Append(" -= value;\n")
.Append("}\n");
// Generate On{EventName} method to raise the event
var invokeMethodSymbol = signalDelegate.InvokeMethodData.Method;
int paramCount = invokeMethodSymbol.Parameters.Length;
string raiseMethodModifiers = signalDelegate.DelegateSymbol.ContainingType.IsSealed ?
"private" :
"protected";
source.Append($" {raiseMethodModifiers} void On{signalName}(");
for (int i = 0; i < paramCount; i++)
{
var paramSymbol = invokeMethodSymbol.Parameters[i];
source.Append($"{paramSymbol.Type.FullQualifiedNameIncludeGlobal()} {paramSymbol.Name}");
if (i < paramCount - 1)
{
source.Append(", ");
}
}
source.Append(")\n");
source.Append(" {\n");
source.Append($" EmitSignal(SignalName.{signalName}");
foreach (var paramSymbol in invokeMethodSymbol.Parameters)
{
// Enums must be converted to the underlying type before they can be implicitly converted to Variant
if (paramSymbol.Type.TypeKind == TypeKind.Enum)
{
var underlyingType = ((INamedTypeSymbol)paramSymbol.Type).EnumUnderlyingType;
source.Append($", ({underlyingType.FullQualifiedNameIncludeGlobal()}){paramSymbol.Name}");
continue;
}
source.Append($", {paramSymbol.Name}");
}
source.Append(");\n");
source.Append(" }\n");
}
// Generate RaiseGodotClassSignalCallbacks