[NUI] the exception occuring is replaced with an error log

Because there is no guide for the application and because the application using this API will immediately crash if an exception occurs.

src/Tizen.NUI/src/public/BaseComponents/ViewAccessibilityWrappers.cs

@@ -56,7 +56,9 @@ private static View GetViewFromRefObject(IntPtr refObjectPtr)
 
             if (view is null)
             {
-                throw new ArgumentException($"RefObject 0x{refObjectPtr:x} is not a View", nameof(refObjectPtr));
+                // There is no guidance for exception handling in the application layer.
+                // Therefore, it is necessary to modify the code to display error messages to the user instead of exceptions occurring.
+                Tizen.Log.Error("NUI", $"RefObject 0x{refObjectPtr:x} is not a View nameof{refObjectPtr}");
             }
 
             return view;
@@ -65,6 +67,7 @@ private static View GetViewFromRefObject(IntPtr refObjectPtr)
         private static T GetInterfaceFromRefObject<T>(IntPtr refObjectPtr)
         {
             var view = GetViewFromRefObject(refObjectPtr);
+            if (view == null) { return default(T); }
 
             // NUIViewAccessible::CallMethod<T> checks whether a given interface is implemented
             // before jumping to managed code, so this condition should always be true.
@@ -114,6 +117,7 @@ private static void InitializeAccessibilityDelegateAccessibleInterface()
         private static ulong AccessibilityCalculateStatesWrapper(IntPtr self, ulong initialStates)
         {
             View view = GetViewFromRefObject(self);
+            if (view == null) { return 0; }
 
             ulong bitMask = 0UL;
 
@@ -130,6 +134,7 @@ private static ulong AccessibilityCalculateStatesWrapper(IntPtr self, ulong init
         private static void AccessibilityGetAttributes(IntPtr self, Interop.ControlDevel.AccessibilityDelegate.AccessibilityGetAttributesCallback callback, IntPtr userData)
         {
             var view = GetViewFromRefObject(self);
+            if (view == null) { return ; }
             var attributes = view.AccessibilityAttributes;
             var classKey = "class";
 
@@ -151,14 +156,19 @@ private static void AccessibilityGetAttributes(IntPtr self, Interop.ControlDevel
 
         private static IntPtr AccessibilityGetDescriptionWrapper(IntPtr self)
         {
-            string description = GetViewFromRefObject(self).AccessibilityGetDescription();
+            View view = GetViewFromRefObject(self);
+            if (view == null) { return IntPtr.Zero;}
+
+            string description = view.AccessibilityGetDescription();
 
             return DuplicateString(description);
         }
 
         private static uint AccessibilityGetInterfaces(IntPtr self)
         {
             View view = GetViewFromRefObject(self);
+            if (view == null) { return 0; }
+
             uint flags = 0U;
 
             if (view is IAtspiEditableText)
@@ -196,7 +206,10 @@ private static uint AccessibilityGetInterfaces(IntPtr self)
 
         private static IntPtr AccessibilityGetNameWrapper(IntPtr self)
         {
-            string name = GetViewFromRefObject(self).AccessibilityGetName();
+            View view = GetViewFromRefObject(self);
+            if (view == null) { return IntPtr.Zero; }
+
+            string name = view.AccessibilityGetName();
 
             return DuplicateString(name);
         }
@@ -216,18 +229,26 @@ private static void InitializeAccessibilityDelegateActionInterface()
 
         private static bool AccessibilityDoActionWrapper(IntPtr self, IntPtr name)
         {
-            return GetViewFromRefObject(self).AccessibilityDoAction(Marshal.PtrToStringAnsi(name));
+            View view = GetViewFromRefObject(self);
+            if (view == null) { return false; }
+
+            return view.AccessibilityDoAction(Marshal.PtrToStringAnsi(name));
         }
 
         private static int AccessibilityGetActionCountWrapper(IntPtr self)
         {
-            return GetViewFromRefObject(self).AccessibilityGetActionCount();
+            View view = GetViewFromRefObject(self);
+            if (view == null) { return 0; }
+
+            return view.AccessibilityGetActionCount();
         }
 
         private static IntPtr AccessibilityGetActionNameWrapper(IntPtr self, int index)
         {
-            string name = GetViewFromRefObject(self).AccessibilityGetActionName(index);
-
+            View view = GetViewFromRefObject(self);
+            if (view == null) { return IntPtr.Zero; }
+
+            string name = view.AccessibilityGetActionName(index);
             return DuplicateString(name);
         }
 
@@ -244,7 +265,10 @@ private static void InitializeAccessibilityDelegateComponentInterface()
 
         private static bool AccessibilityIsScrollableWrapper(IntPtr self)
         {
-            return GetViewFromRefObject(self).AccessibilityIsScrollable();
+            View view = GetViewFromRefObject(self);
+            if (view == null) { return false; }
+
+            return view.AccessibilityIsScrollable();
         }
 
         //
@@ -678,6 +702,8 @@ private static double AccessibilityGetMinimumIncrementWrapper(IntPtr self)
         private static IntPtr AccessibilityGetValueTextWrapper(IntPtr self)
         {
             var view = GetViewFromRefObject(self);
+            if (view == null) { return IntPtr.Zero; }
+
             var value = GetInterfaceFromRefObject<IAtspiValue>(self);
             string text;
 
@@ -721,6 +747,7 @@ private static void InitializeAccessibilityDelegateTizenExtensions()
         private static bool AccessibilityScrollToChildWrapper(IntPtr self, IntPtr child)
         {
             View view = GetViewFromRefObject(self);
+            if (view == null) { return false; }
 
             return view.AccessibilityScrollToChild(view.GetInstanceSafely<View>(child));
         }