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C#: Add source generator for signals as events

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Changed the signal declaration signal to:

```
// The following generates a MySignal event
[Signal] public delegate void MySignalEventHandler(int param);
```
This commit is contained in:
Ignacio Roldán Etcheverry 2022-07-28 17:41:47 +02:00
parent f033764ffe
commit 97713ff77a
31 changed files with 997 additions and 523 deletions
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70
modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/ScriptSerializationGenerator.cs
View file

@ -1,3 +1,4 @@
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.CodeAnalysis;
@ -120,10 +121,39 @@ namespace Godot.SourceGenerators
var godotClassProperties = propertySymbols.WhereIsGodotCompatibleType(typeCache).ToArray();
var godotClassFields = fieldSymbols.WhereIsGodotCompatibleType(typeCache).ToArray();
var signalDelegateSymbols = members
.Where(s => s.Kind == SymbolKind.NamedType)
.Cast<INamedTypeSymbol>()
.Where(namedTypeSymbol => namedTypeSymbol.TypeKind == TypeKind.Delegate)
.Where(s => s.GetAttributes()
.Any(a => a.AttributeClass?.IsGodotSignalAttribute() ?? false));
List<GodotSignalDelegateData> godotSignalDelegates = new();
foreach (var signalDelegateSymbol in signalDelegateSymbols)
{
if (!signalDelegateSymbol.Name.EndsWith(ScriptSignalsGenerator.SignalDelegateSuffix))
continue;
string signalName = signalDelegateSymbol.Name;
signalName = signalName.Substring(0,
signalName.Length - ScriptSignalsGenerator.SignalDelegateSuffix.Length);
var invokeMethodData = signalDelegateSymbol
.DelegateInvokeMethod?.HasGodotCompatibleSignature(typeCache);
if (invokeMethodData == null)
continue;
godotSignalDelegates.Add(new(signalName, signalDelegateSymbol, invokeMethodData.Value));
}
source.Append(
" protected override void SaveGodotObjectData(global::Godot.Bridge.GodotSerializationInfo info)\n {\n");
source.Append(" base.SaveGodotObjectData(info);\n");
// Save properties
foreach (var property in godotClassProperties)
{
string propertyName = property.PropertySymbol.Name;
@ -135,6 +165,8 @@ namespace Godot.SourceGenerators
.Append(");\n");
}
// Save fields
foreach (var field in godotClassFields)
{
string fieldName = field.FieldSymbol.Name;
@ -146,12 +178,27 @@ namespace Godot.SourceGenerators
.Append(");\n");
}
// Save signal events
foreach (var signalDelegate in godotSignalDelegates)
{
string signalName = signalDelegate.Name;
source.Append(" info.AddSignalEventDelegate(GodotInternal.SignalName_")
.Append(signalName)
.Append(", this.backing_")
.Append(signalName)
.Append(");\n");
}
source.Append(" }\n");
source.Append(
" protected override void RestoreGodotObjectData(global::Godot.Bridge.GodotSerializationInfo info)\n {\n");
source.Append(" base.RestoreGodotObjectData(info);\n");
// Restore properties
foreach (var property in godotClassProperties)
{
string propertyName = property.PropertySymbol.Name;
@ -171,6 +218,8 @@ namespace Godot.SourceGenerators
.Append(";\n");
}
// Restore fields
foreach (var field in godotClassFields)
{
string fieldName = field.FieldSymbol.Name;
@ -190,6 +239,27 @@ namespace Godot.SourceGenerators
.Append(";\n");
}
// Restore signal events
foreach (var signalDelegate in godotSignalDelegates)
{
string signalName = signalDelegate.Name;
string signalDelegateQualifiedName = signalDelegate.DelegateSymbol.FullQualifiedName();
source.Append(" if (info.TryGetSignalEventDelegate<")
.Append(signalDelegateQualifiedName)
.Append(">(GodotInternal.SignalName_")
.Append(signalName)
.Append(", out var _value_")
.Append(signalName)
.Append("))\n")
.Append(" this.backing_")
.Append(signalName)
.Append(" = _value_")
.Append(signalName)
.Append(";\n");
}
source.Append(" }\n");
source.Append("}\n"); // partial class