Fix formatting when file scoped namespace

Fix #360

Author: JohanLarsson

WpfAnalyzers.Test/Refactorings/AutoPropertyRefactoringTests.cs

@@ -450,6 +450,50 @@ public static void SetValue(DependencyObject element, double value)
             element.SetValue(ValueProperty, value);
         }
     }
+}";
+        RoslynAssert.Refactoring(Refactoring, before, after);
+    }
+
+    [Test]
+    public static void StaticAutoPropertyFileScopedNamespace()
+    {
+        var before = @"
+namespace N;
+
+public static class C
+{
+    public static int ↓Number { get; set; }
+}";
+
+        var after = @"
+namespace N;
+
+using System.Windows;
+
+public static class C
+{
+    public static readonly DependencyProperty NumberProperty = DependencyProperty.RegisterAttached(
+        ""Number"",
+        typeof(int),
+        typeof(C),
+        new PropertyMetadata(default(int)));
+
+    /// <summary>Helper for getting <see cref=""NumberProperty""/> from <paramref name=""element""/>.</summary>
+    /// <param name=""element""><see cref=""DependencyObject""/> to read <see cref=""NumberProperty""/> from.</param>
+    /// <returns>Number property value.</returns>
+    [AttachedPropertyBrowsableForType(typeof(DependencyObject))]
+    public static int GetNumber(DependencyObject element)
+    {
+        return (int)element.GetValue(NumberProperty);
+    }
+
+    /// <summary>Helper for setting <see cref=""NumberProperty""/> on <paramref name=""element""/>.</summary>
+    /// <param name=""element""><see cref=""DependencyObject""/> to set <see cref=""NumberProperty""/> on.</param>
+    /// <param name=""value"">Number property value.</param>
+    public static void SetNumber(DependencyObject element, int value)
+    {
+        element.SetValue(NumberProperty, value);
+    }
 }";
         RoslynAssert.Refactoring(Refactoring, before, after);
     }

WpfAnalyzers/Refactorings/AutoPropertyRefactoring.cs

@@ -61,11 +61,9 @@ public override async Task ComputeRefactoringsAsync(CodeRefactoringContext conte
         var semanticModel = await context.Document.GetSemanticModelAsync(context.CancellationToken)
                                          .ConfigureAwait(false);
 
-        if (syntaxRoot is { } &&
-            syntaxRoot.FindNode(context.Span) is { } node &&
+        if (syntaxRoot?.FindNode(context.Span) is { } node &&
             node.FirstAncestorOrSelf<PropertyDeclarationSyntax>() is { Parent: ClassDeclarationSyntax containingClass } property &&
-            property.IsAutoProperty() &&
-            semanticModel is { })
+            property.IsAutoProperty() && semanticModel is { })
         {
             if (property.Modifiers.Any(SyntaxKind.StaticKeyword))
             {
@@ -494,7 +492,11 @@ SyntaxToken PublicOrPrivate()
 
                     if (!withStandardDocs)
                     {
-                        return SyntaxFactory.Token(default, keyword, SyntaxFactory.TriviaList(SyntaxFactory.Space));
+                        return SyntaxFactory.Token(
+                            SyntaxFactory.TriviaList(
+                                SyntaxFactory.Whitespace(property.LeadingWhitespace() ?? "        ")),
+                            keyword,
+                            SyntaxFactory.TriviaList(SyntaxFactory.Space));
                     }
 
                     return SyntaxFactory.Token(

WpfAnalyzers/WpfAnalyzers.csproj

@@ -80,7 +80,7 @@
 
   <ItemGroup>
     <PackageReference Include="Gu.Analyzers" Version="2.0.2" PrivateAssets="all" />
-    <PackageReference Include="Gu.Roslyn.Extensions.Source" Version="0.16.5" PrivateAssets="all" />
+    <PackageReference Include="Gu.Roslyn.Extensions.Source" Version="0.16.6" PrivateAssets="all" />
     <PackageReference Include="IDisposableAnalyzers" Version="4.0.1" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.0.1" PrivateAssets="all" />
     <PackageReference Include="Microsoft.VisualStudio.Threading.Analyzers" Version="17.1.46" PrivateAssets="all" />