[NUI] Unified native singleton class instance getter

[platform/core/csapi/tizenfx.git] / src / Tizen.NUI / src / public / Clipboard / Clipboard.cs

diff --git a/src/Tizen.NUI/src/public/Clipboard/Clipboard.cs b/src/Tizen.NUI/src/public/Clipboard/Clipboard.cs
index 887ca9a..c0f84f8 100755 (executable)
--- a/src/Tizen.NUI/src/public/Clipboard/Clipboard.cs
+++ b/src/Tizen.NUI/src/public/Clipboard/Clipboard.cs
@@ -31,6 +31,8 @@ namespace Tizen.NUI
     [EditorBrowsable(EditorBrowsableState.Never)]
     public partial class Clipboard : BaseHandle
     {
+        private static readonly Clipboard instance = Clipboard.GetInternal();
+
         /// <summary>
         /// User callback for clipboard event.
         /// </summary>
@@ -42,11 +44,6 @@ namespace Tizen.NUI
         internal bool hasClipboardDataReceived = false;
         internal Dictionary<uint, ClipboardCallback> receivedCallbackDictionary = new Dictionary<uint, ClipboardCallback>();
 
-        private Clipboard() : this(Interop.Clipboard.Get(), true)
-        {
-            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
-        }
-
         private Clipboard(global::System.IntPtr cPtr, bool cMemoryOwn) : base(cPtr, cMemoryOwn)
         {
         }
@@ -55,7 +52,55 @@ namespace Tizen.NUI
         /// Gets the singleton instance of Clipboard.
         /// </summary>
         [EditorBrowsable(EditorBrowsableState.Never)]
-        public static Clipboard Instance { get; } = new Clipboard();
+        public static Clipboard Instance
+        {
+            get
+            {
+                return instance;
+            }
+        }
+
+        private static Clipboard GetInternal()
+        {
+            global::System.IntPtr cPtr = Interop.Clipboard.Get();
+
+            if(cPtr == global::System.IntPtr.Zero)
+            {
+                NUILog.ErrorBacktrace("Clipboard.Instance called before Application created, or after Application terminated!");
+                // Do not throw exception until TCT test passed.
+            }
+
+            Clipboard ret = Registry.GetManagedBaseHandleFromNativePtr(cPtr) as Clipboard;
+            if (ret != null)
+            {
+                NUILog.ErrorBacktrace("Clipboard.GetInternal() Should be called only one time!");
+                object dummyObect = new object();
+
+                HandleRef CPtr = new HandleRef(dummyObect, cPtr);
+                Interop.BaseHandle.DeleteBaseHandle(CPtr);
+                CPtr = new HandleRef(null, global::System.IntPtr.Zero);
+            }
+            else
+            {
+                ret = new Clipboard(cPtr, true);
+            }
+
+            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
+            return ret;
+        }
+
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                NUILog.ErrorBacktrace("We should not manually dispose for singleton class!");
+            }
+            else
+            {
+                base.Dispose(disposing);
+            }
+        }
 
         /// <summary>
         /// Request set the given data to the clipboard.