Resolve #48. Add common BindingContextProvider.

Author: ChebanovDD

src/UnityMvvmToolkit.UnityPackage/Assets/Plugins/UnityMvvmToolkit/Runtime/UITK/BindableUIElements/BindingContextProvider.T.cs

@@ -82,16 +82,10 @@ public virtual void ResetBindingContext(IObjectProvider objectProvider)
             }
         }
 
-        private void OnBindingContextPropertyValueChanged(object sender, TBindingContext bindingContext)
-        {
-            SetChildsBindingContext(bindingContext, _objectProvider);
-        }
-
         protected virtual void OnSetBindingContext(IBindingContext context, IObjectProvider objectProvider,
             PropertyBindingData propertyBindingData)
         {
-            _bindingContextProperty =
-                objectProvider.RentReadOnlyProperty<TBindingContext>(context, propertyBindingData);
+            _bindingContextProperty = RentReadOnlyProperty(context, objectProvider, propertyBindingData);
             _bindingContextProperty.ValueChanged += OnBindingContextPropertyValueChanged;
 
             if (_bindingContextProperty.Value is null)
@@ -115,6 +109,17 @@ protected virtual void OnResetBindingContext(IObjectProvider objectProvider)
             ResetChildsBindingContext(objectProvider);
         }
 
+        private void OnBindingContextPropertyValueChanged(object sender, TBindingContext bindingContext)
+        {
+            SetChildsBindingContext(bindingContext, _objectProvider);
+        }
+
+        protected virtual IReadOnlyProperty<TBindingContext> RentReadOnlyProperty(IBindingContext context,
+            IObjectProvider objectProvider, PropertyBindingData propertyBindingData)
+        {
+            return objectProvider.RentReadOnlyProperty<TBindingContext>(context, propertyBindingData);
+        }
+
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void SetChildsBindingContext(IBindingContext bindingContext, IObjectProvider objectProvider)
         {

src/UnityMvvmToolkit.UnityPackage/Assets/Plugins/UnityMvvmToolkit/Runtime/UITK/BindableUIElements/BindingContextProvider.cs

@@ -0,0 +1,14 @@
+using UnityMvvmToolkit.Core;
+using UnityMvvmToolkit.Core.Interfaces;
+
+namespace UnityMvvmToolkit.UITK.BindableUIElements
+{
+    public partial class BindingContextProvider : BindingContextProvider<IBindingContext>
+    {
+        protected override IReadOnlyProperty<IBindingContext> RentReadOnlyProperty(IBindingContext context,
+            IObjectProvider objectProvider, PropertyBindingData propertyBindingData)
+        {
+            return objectProvider.RentReadOnlyPropertyAs<IBindingContext>(context, propertyBindingData);
+        }
+    }
+}

src/UnityMvvmToolkit.UnityPackage/Assets/Plugins/UnityMvvmToolkit/Runtime/UITK/BindableUIElements/BindingContextProvider.cs.meta

@@ -0,0 +1,23 @@
+using UnityEngine.UIElements;
+using UnityMvvmToolkit.Core.Interfaces;
+
+namespace UnityMvvmToolkit.UITK.BindableUIElements
+{
+    partial class BindingContextProvider
+    {
+        public new class UxmlFactory : UxmlFactory<BindingContextProvider, UxmlTraits>
+        {
+        }
+
+#if UNITY_2023_2_OR_NEWER
+        [System.Serializable]
+        public new class UxmlSerializedData : BindingContextProvider<IBindingContext>.UxmlSerializedData
+        {
+        }
+#else
+        public new class UxmlTraits : BindingContextProvider<IBindingContext>.UxmlTraits
+        {
+        }
+#endif
+    }
+}