1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
|
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Text;
namespace Godot.SourceGenerators
{
[Generator]
public class ScriptSerializationGenerator : ISourceGenerator
{
public void Initialize(GeneratorInitializationContext context)
{
}
public void Execute(GeneratorExecutionContext context)
{
if (context.AreGodotSourceGeneratorsDisabled())
return;
INamedTypeSymbol[] godotClasses = context
.Compilation.SyntaxTrees
.SelectMany(tree =>
tree.GetRoot().DescendantNodes()
.OfType<ClassDeclarationSyntax>()
.SelectGodotScriptClasses(context.Compilation)
// Report and skip non-partial classes
.Where(x =>
{
if (x.cds.IsPartial())
{
if (x.cds.IsNested() && !x.cds.AreAllOuterTypesPartial(out var typeMissingPartial))
{
Common.ReportNonPartialGodotScriptOuterClass(context, typeMissingPartial!);
return false;
}
return true;
}
Common.ReportNonPartialGodotScriptClass(context, x.cds, x.symbol);
return false;
})
.Select(x => x.symbol)
)
.Distinct<INamedTypeSymbol>(SymbolEqualityComparer.Default)
.ToArray();
if (godotClasses.Length > 0)
{
var typeCache = new MarshalUtils.TypeCache(context.Compilation);
foreach (var godotClass in godotClasses)
{
VisitGodotScriptClass(context, typeCache, godotClass);
}
}
}
private static void VisitGodotScriptClass(
GeneratorExecutionContext context,
MarshalUtils.TypeCache typeCache,
INamedTypeSymbol symbol
)
{
INamespaceSymbol namespaceSymbol = symbol.ContainingNamespace;
string classNs = namespaceSymbol != null && !namespaceSymbol.IsGlobalNamespace ?
namespaceSymbol.FullQualifiedNameOmitGlobal() :
string.Empty;
bool hasNamespace = classNs.Length != 0;
bool isInnerClass = symbol.ContainingType != null;
string uniqueHint = symbol.FullQualifiedNameOmitGlobal().SanitizeQualifiedNameForUniqueHint()
+ "_ScriptSerialization.generated";
var source = new StringBuilder();
source.Append("using Godot;\n");
source.Append("using Godot.NativeInterop;\n");
source.Append("\n");
if (hasNamespace)
{
source.Append("namespace ");
source.Append(classNs);
source.Append(" {\n\n");
}
if (isInnerClass)
{
var containingType = symbol.ContainingType;
while (containingType != null)
{
source.Append("partial ");
source.Append(containingType.GetDeclarationKeyword());
source.Append(" ");
source.Append(containingType.NameWithTypeParameters());
source.Append("\n{\n");
containingType = containingType.ContainingType;
}
}
source.Append("partial class ");
source.Append(symbol.NameWithTypeParameters());
source.Append("\n{\n");
var members = symbol.GetMembers();
var propertySymbols = members
.Where(s => !s.IsStatic && s.Kind == SymbolKind.Property)
.Cast<IPropertySymbol>()
.Where(s => !s.IsIndexer && s.ExplicitInterfaceImplementations.Length == 0);
var fieldSymbols = members
.Where(s => !s.IsStatic && s.Kind == SymbolKind.Field && !s.IsImplicitlyDeclared)
.Cast<IFieldSymbol>();
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;
source.Append(" info.AddProperty(PropertyName.")
.Append(propertyName)
.Append(", ")
.AppendManagedToVariantExpr(string.Concat("this.", propertyName),
property.PropertySymbol.Type, property.Type)
.Append(");\n");
}
// Save fields
foreach (var field in godotClassFields)
{
string fieldName = field.FieldSymbol.Name;
source.Append(" info.AddProperty(PropertyName.")
.Append(fieldName)
.Append(", ")
.AppendManagedToVariantExpr(string.Concat("this.", fieldName),
field.FieldSymbol.Type, field.Type)
.Append(");\n");
}
// Save signal events
foreach (var signalDelegate in godotSignalDelegates)
{
string signalName = signalDelegate.Name;
source.Append(" info.AddSignalEventDelegate(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;
source.Append(" if (info.TryGetProperty(PropertyName.")
.Append(propertyName)
.Append(", out var _value_")
.Append(propertyName)
.Append("))\n")
.Append(" this.")
.Append(propertyName)
.Append(" = ")
.AppendVariantToManagedExpr(string.Concat("_value_", propertyName),
property.PropertySymbol.Type, property.Type)
.Append(";\n");
}
// Restore fields
foreach (var field in godotClassFields)
{
string fieldName = field.FieldSymbol.Name;
source.Append(" if (info.TryGetProperty(PropertyName.")
.Append(fieldName)
.Append(", out var _value_")
.Append(fieldName)
.Append("))\n")
.Append(" this.")
.Append(fieldName)
.Append(" = ")
.AppendVariantToManagedExpr(string.Concat("_value_", fieldName),
field.FieldSymbol.Type, field.Type)
.Append(";\n");
}
// Restore signal events
foreach (var signalDelegate in godotSignalDelegates)
{
string signalName = signalDelegate.Name;
string signalDelegateQualifiedName = signalDelegate.DelegateSymbol.FullQualifiedNameIncludeGlobal();
source.Append(" if (info.TryGetSignalEventDelegate<")
.Append(signalDelegateQualifiedName)
.Append(">(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
if (isInnerClass)
{
var containingType = symbol.ContainingType;
while (containingType != null)
{
source.Append("}\n"); // outer class
containingType = containingType.ContainingType;
}
}
if (hasNamespace)
{
source.Append("\n}\n");
}
context.AddSource(uniqueHint, SourceText.From(source.ToString(), Encoding.UTF8));
}
}
}
|
