From bda4a4b9641788e2718a10360f5ae21ee1bfe248 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Thu, 29 Sep 2022 23:24:17 +0200
Subject: [PATCH] Include inherited/default values in diagnostic.

---
 src/Avalonia.Base/PropertyStore/ValueStore.cs | 24 ++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/src/Avalonia.Base/PropertyStore/ValueStore.cs b/src/Avalonia.Base/PropertyStore/ValueStore.cs
index eb97009355..9b80002a33 100644
--- a/src/Avalonia.Base/PropertyStore/ValueStore.cs
+++ b/src/Avalonia.Base/PropertyStore/ValueStore.cs
@@ -619,11 +619,29 @@ namespace Avalonia.PropertyStore
 
         public AvaloniaPropertyValue GetDiagnostic(AvaloniaProperty property)
         {
-            var effective = GetEffectiveValue(property);
+            object? value;
+            BindingPriority priority;
+
+            if (_effectiveValues.TryGetValue(property, out var v))
+            {
+                value = v.Value;
+                priority = v.Priority;
+            }
+            else if (property.Inherits && TryGetInheritedValue(property, out v))
+            {
+                value = v.Value;
+                priority = BindingPriority.Inherited;
+            }
+            else
+            {
+                value = GetDefaultValue(property);
+                priority = BindingPriority.Unset;
+            }
+
             return new AvaloniaPropertyValue(
                 property,
-                effective?.Value,
-                effective?.Priority ?? BindingPriority.Unset,
+                value,
+                priority,
                 null);
         }