From 761a22cff56d09f02c391661c86d0ce4d2657711 Mon Sep 17 00:00:00 2001
From: Sergio Pedri <sergio0694@live.com>
Date: Tue, 20 Aug 2024 16:05:06 -0700
Subject: [PATCH] Forward generator options to FAWMN

---
 .../ObservablePropertyGenerator.Execute.cs    | 29 +++++++++++++++++++
 .../ObservablePropertyGenerator.cs            | 12 ++++++--
 2 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/src/CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservablePropertyGenerator.Execute.cs b/src/CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservablePropertyGenerator.Execute.cs
index c6bf051a4..6aefd581a 100644
--- a/src/CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservablePropertyGenerator.Execute.cs
+++ b/src/CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservablePropertyGenerator.Execute.cs
@@ -16,6 +16,7 @@
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Diagnostics;
 using static CommunityToolkit.Mvvm.SourceGenerators.Diagnostics.DiagnosticDescriptors;
 using static Microsoft.CodeAnalysis.CSharp.SyntaxFactory;
 
@@ -35,6 +36,7 @@ internal static class Execute
         /// <param name="fieldSyntax">The <see cref="FieldDeclarationSyntax"/> instance to process.</param>
         /// <param name="fieldSymbol">The input <see cref="IFieldSymbol"/> instance to process.</param>
         /// <param name="semanticModel">The <see cref="SemanticModel"/> instance for the current run.</param>
+        /// <param name="options">The options in use for the generator.</param>
         /// <param name="token">The cancellation token for the current operation.</param>
         /// <param name="propertyInfo">The resulting <see cref="PropertyInfo"/> value, if successfully retrieved.</param>
         /// <param name="diagnostics">The resulting diagnostics from the processing operation.</param>
@@ -43,6 +45,7 @@ public static bool TryGetInfo(
             FieldDeclarationSyntax fieldSyntax,
             IFieldSymbol fieldSymbol,
             SemanticModel semanticModel,
+            AnalyzerConfigOptions options,
             CancellationToken token,
             [NotNullWhen(true)] out PropertyInfo? propertyInfo,
             out ImmutableArray<DiagnosticInfo> diagnostics)
@@ -66,6 +69,11 @@ public static bool TryGetInfo(
 
             token.ThrowIfCancellationRequested();
 
+            // Override the property changing support if explicitly disabled
+            shouldInvokeOnPropertyChanging &= GetEnableINotifyPropertyChangingSupport(options);
+
+            token.ThrowIfCancellationRequested();
+
             // Get the property type and name
             string typeNameWithNullabilityAnnotations = fieldSymbol.Type.GetFullyQualifiedNameWithNullabilityAnnotations();
             string fieldName = fieldSymbol.Name;
@@ -320,6 +328,27 @@ public static bool TryGetInfo(
             return true;
         }
 
+        /// <summary>
+        /// Gets the value for the "MvvmToolkitEnableINotifyPropertyChangingSupport" property.
+        /// </summary>
+        /// <param name="options">The options in use for the generator.</param>
+        /// <returns>The value for the "MvvmToolkitEnableINotifyPropertyChangingSupport" property.</returns>
+        public static bool GetEnableINotifyPropertyChangingSupport(AnalyzerConfigOptions options)
+        {
+            if (options.TryGetValue("build_property.MvvmToolkitEnableINotifyPropertyChangingSupport", out string? propertyValue))
+            {
+                if (bool.TryParse(propertyValue, out bool enableINotifyPropertyChangingSupport))
+                {
+                    return enableINotifyPropertyChangingSupport;
+                }
+            }
+
+            // This setting is enabled by default, for backwards compatibility.
+            // Note that this path should never be reached, as the default
+            // value is also set in a .targets file bundled in the package.
+            return true;
+        }
+
         /// <summary>
         /// Validates the containing type for a given field being annotated.
         /// </summary>
diff --git a/src/CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservablePropertyGenerator.cs b/src/CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservablePropertyGenerator.cs
index ad7e5fe03..68801d449 100644
--- a/src/CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservablePropertyGenerator.cs
+++ b/src/CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservablePropertyGenerator.cs
@@ -25,8 +25,7 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
     {
         // Gather info for all annotated fields
         IncrementalValuesProvider<(HierarchyInfo Hierarchy, Result<PropertyInfo?> Info)> propertyInfoWithErrors =
-            context.SyntaxProvider
-            .ForAttributeWithMetadataName(
+            context.ForAttributeWithMetadataNameAndOptions(
                 "CommunityToolkit.Mvvm.ComponentModel.ObservablePropertyAttribute",
                 static (node, _) => node is VariableDeclaratorSyntax { Parent: VariableDeclarationSyntax { Parent: FieldDeclarationSyntax { Parent: ClassDeclarationSyntax or RecordDeclarationSyntax, AttributeLists.Count: > 0 } } },
                 static (context, token) =>
@@ -44,7 +43,14 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
 
                     token.ThrowIfCancellationRequested();
 
-                    _ = Execute.TryGetInfo(fieldDeclaration, fieldSymbol, context.SemanticModel, token, out PropertyInfo? propertyInfo, out ImmutableArray<DiagnosticInfo> diagnostics);
+                    _ = Execute.TryGetInfo(
+                        fieldDeclaration,
+                        fieldSymbol,
+                        context.SemanticModel,
+                        context.GlobalOptions,
+                        token,
+                        out PropertyInfo? propertyInfo,
+                        out ImmutableArray<DiagnosticInfo> diagnostics);
 
                     token.ThrowIfCancellationRequested();