src/Tizen.NUI/src/public/Common/BaseHandle.cs

   1 /*
   2  * Copyright(c) 2022 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17 using System;
  18 using System.ComponentModel;
  19 using System.Runtime.CompilerServices;
  20 using Tizen.NUI.Binding;
  21 using global::System.Diagnostics;
  22
  23 namespace Tizen.NUI
  24 {
  25     /// <summary>
  26     /// BaseHandle is a handle to an internal Dali resource.
  27     /// </summary>
  28     /// <since_tizen> 3 </since_tizen>
  29     public class BaseHandle : Element, global::System.IDisposable
  30     {
  31         /// <summary>
  32         /// swigCMemOwn
  33         /// </summary>
  34         /// <since_tizen> 3 </since_tizen>
  35         [Obsolete("Deprecated in API9, will be removed in API11, Use SwigCMemOwn")]
  36         [System.Diagnostics.CodeAnalysis.SuppressMessage("Design", "CA1051:Do not declare visible instance fields", Justification = "<Pending>")]
  37         protected bool swigCMemOwn;
  38
  39         /// <summary>
  40         /// The flag to check if it is already disposed of.
  41         /// </summary>
  42         /// <since_tizen> 3 </since_tizen>
  43         [Obsolete("Deprecated in API9, will be removed in API11, Use Disposed")]
  44         [System.Diagnostics.CodeAnalysis.SuppressMessage("Design", "CA1051:Do not declare visible instance fields", Justification = "<Pending>")]
  45         protected bool disposed = false;
  46
  47         private global::System.Runtime.InteropServices.HandleRef swigCPtr;
  48         private global::System.Runtime.InteropServices.HandleRef swigCPtrCopy;
  49         private bool registerMe;
  50
  51         //The flag to check who called Dispose(). (By User or DisposeQueue)
  52         private bool isDisposeQueued = false;
  53
  54         /// <summary>
  55         /// Create an instance of BaseHandle.
  56         /// </summary>
  57         /// <since_tizen> 3 </since_tizen>
  58         public BaseHandle() : this(Interop.BaseHandle.NewBaseHandle())
  59         {
  60             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  61         }
  62
  63         /// <summary>
  64         /// Create an instance of BaseHandle.
  65         /// </summary>
  66         /// <param name="handle">The BaseHandle instance.</param>
  67         /// <since_tizen> 3 </since_tizen>
  68         public BaseHandle(BaseHandle handle) : this(Interop.BaseHandle.NewBaseHandle(BaseHandle.getCPtr(handle)))
  69         {
  70             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  71         }
  72
  73         internal BaseHandle(global::System.IntPtr cPtr, bool cMemoryOwn)
  74         {
  75             //to catch derived classes dali native exceptions
  76             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  77
  78             DebugFileLogging.Instance.WriteLog($"BaseHandle.contructor with cMemeryOwn:{cMemoryOwn} START");
  79
  80             registerMe = swigCMemOwn = cMemoryOwn;
  81             swigCPtr = new global::System.Runtime.InteropServices.HandleRef(this, cPtr);
  82             // using copy constructor to create another native handle so Registry.Unregister works fine.
  83             swigCPtrCopy = new global::System.Runtime.InteropServices.HandleRef(this, Interop.BaseHandle.NewBaseHandle(swigCPtr));
  84             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  85
  86             if (registerMe)
  87             {
  88                 // Register this instance of BaseHandle in the registry.
  89                 Registry.Register(this);
  90             }
  91
  92             disposeDebuggingCtor();
  93             DebugFileLogging.Instance.WriteLog($" BaseHandle.contructor with cMemeryOwn END");
  94             DebugFileLogging.Instance.WriteLog($"=============================");
  95         }
  96
  97         internal BaseHandle(global::System.IntPtr cPtr)
  98         {
  99             DebugFileLogging.Instance.WriteLog($"BaseHandle.contructor START");
 100
 101             registerMe = swigCMemOwn = true;
 102
 103             swigCPtr = new global::System.Runtime.InteropServices.HandleRef(this, cPtr);
 104
 105             // using copy constructor to create another native handle so Registry.Unregister works fine.
 106             swigCPtrCopy = new global::System.Runtime.InteropServices.HandleRef(this, Interop.BaseHandle.NewBaseHandle(SwigCPtr));
 107             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 108
 109             if (registerMe)
 110             {
 111                 // Register this instance of BaseHandle in the registry.
 112                 Registry.Register(this);
 113             }
 114
 115             disposeDebuggingCtor();
 116             DebugFileLogging.Instance.WriteLog($"BaseHandle.contructor END");
 117             DebugFileLogging.Instance.WriteLog($"=============================");
 118         }
 119
 120         /// <summary>
 121         /// Dispose.
 122         /// </summary>
 123         /// <since_tizen> 3 </since_tizen>
 124         // following this guide: https://docs.microsoft.com/ko-kr/dotnet/fundamentals/code-analysis/quality-rules/ca1063?view=vs-2019 (CA1063)
 125         ~BaseHandle() => Dispose(false);
 126
 127         /// <summary>
 128         /// Event when a property is set.
 129         /// </summary>
 130         /// <since_tizen> 5 </since_tizen>
 131         /// <seealso cref="BindableObject.PropertyChanged"/>
 132         [Obsolete("Deprecated in API9, will be removed in API11, Use BindableObject.PropertyChanged instead.")]
 133         public event PropertyChangedEventHandler PropertySet;
 134
 135         internal global::System.Runtime.InteropServices.HandleRef GetBaseHandleCPtrHandleRef
 136         {
 137             get
 138             {
 139                 return swigCPtrCopy;
 140             }
 141         }
 142
 143         /// <summary>
 144         /// Returns the bool value true to indicate that an operand is true and returns false otherwise.
 145         /// </summary>
 146         /// <since_tizen> 3 </since_tizen>
 147         public static bool operator true(BaseHandle handle)
 148         {
 149             // if the C# object is null, return false
 150             if (BaseHandle.ReferenceEquals(handle, null))
 151             {
 152                 return false;
 153             }
 154             // returns true if the handle has a body, false otherwise
 155             return handle.HasBody();
 156         }
 157
 158         /// <summary>
 159         /// Returns the bool false  to indicate that an operand is false and returns true otherwise.
 160         /// </summary>
 161         /// <since_tizen> 3 </since_tizen>
 162         public static bool operator false(BaseHandle handle)
 163         {
 164             // if the C# object is null, return true
 165             if (BaseHandle.ReferenceEquals(handle, null))
 166             {
 167                 return true;
 168             }
 169             return !handle.HasBody();
 170         }
 171
 172         /// <summary>
 173         /// Explicit conversion from Handle to bool.
 174         /// </summary>
 175         /// <since_tizen> 3 </since_tizen>
 176         public static explicit operator bool(BaseHandle handle)
 177         {
 178             // if the C# object is null, return false
 179             if (BaseHandle.ReferenceEquals(handle, null))
 180             {
 181                 return false;
 182             }
 183             // returns true if the handle has a body, false otherwise
 184             return handle.HasBody();
 185         }
 186
 187         /// <summary>
 188         /// Equality operator
 189         /// </summary>
 190         /// <since_tizen> 3 </since_tizen>
 191         public static bool operator ==(BaseHandle x, BaseHandle y)
 192         {
 193             // if the C# objects are the same return true
 194             if (BaseHandle.ReferenceEquals(x, y))
 195             {
 196                 return true;
 197             }
 198             if (!BaseHandle.ReferenceEquals(x, null) && !BaseHandle.ReferenceEquals(y, null))
 199             {
 200                 // drop into native code to see if both handles point to the same body
 201                 return x.IsEqual(y);
 202             }
 203
 204             if (BaseHandle.ReferenceEquals(x, null) && !BaseHandle.ReferenceEquals(y, null))
 205             {
 206                 if (y.HasBody()) return false;
 207                 else return true;
 208             }
 209             if (!BaseHandle.ReferenceEquals(x, null) && BaseHandle.ReferenceEquals(y, null))
 210             {
 211                 if (x.HasBody()) return false;
 212                 else return true;
 213             }
 214
 215             return false;
 216         }
 217
 218         /// <summary>
 219         /// Inequality operator. Returns Null if either operand is Null
 220         /// </summary>
 221         /// <since_tizen> 3 </since_tizen>
 222         public static bool operator !=(BaseHandle x, BaseHandle y)
 223         {
 224             return !(x == y);
 225         }
 226
 227         /// <summary>
 228         /// Logical AND operator.<br />
 229         /// It's possible when doing a  operator this function (opBitwiseAnd) is never called due to short circuiting.<br />
 230         /// </summary>
 231         /// <since_tizen> 3 </since_tizen>
 232         public static BaseHandle operator &(BaseHandle x, BaseHandle y)
 233         {
 234             if (x == y)
 235             {
 236                 return x;
 237             }
 238             return null;
 239         }
 240
 241         /// <summary>
 242         /// Logical OR operator for ||.<br />
 243         /// It's possible when doing a || this function (opBitwiseOr) is never called due to short circuiting.<br />
 244         /// </summary>
 245         /// <since_tizen> 3 </since_tizen>
 246         public static BaseHandle operator |(BaseHandle x, BaseHandle y)
 247         {
 248             if (!BaseHandle.ReferenceEquals(x, null) || !BaseHandle.ReferenceEquals(y, null))
 249             {
 250                 if (x != null && x.HasBody())
 251                 {
 252                     return x;
 253                 }
 254                 if (y != null && y.HasBody())
 255                 {
 256                     return y;
 257                 }
 258                 return null;
 259             }
 260             return null;
 261         }
 262
 263         /// <summary>
 264         /// Logical ! operator
 265         /// </summary>
 266         /// <since_tizen> 3 </since_tizen>
 267         public static bool operator !(BaseHandle x)
 268         {
 269             // if the C# object is null, return true
 270             if (BaseHandle.ReferenceEquals(x, null))
 271             {
 272                 return true;
 273             }
 274             if (x.HasBody())
 275             {
 276                 return false;
 277             }
 278             return true;
 279         }
 280
 281         /// <summary>
 282         /// Equals
 283         /// </summary>
 284         /// <param name="o">The object should be compared.</param>
 285         /// <returns>True if equal.</returns>
 286         /// <since_tizen> 5 </since_tizen>
 287         public override bool Equals(object o)
 288         {
 289             return base.Equals(o);
 290         }
 291
 292         /// <summary>
 293         /// Gets the hash code of this baseHandle.
 294         /// </summary>
 295         /// <returns>The hash code.</returns>
 296         /// <since_tizen> 5 </since_tizen>
 297         public override int GetHashCode()
 298         {
 299             return base.GetHashCode();
 300         }
 301
 302         /// <summary>
 303         /// Dispose.
 304         /// </summary>
 305         /// <since_tizen> 3 </since_tizen>
 306         public void Dispose()
 307         {
 308             if (isDisposeQueued)
 309             {
 310                 Dispose(DisposeTypes.Implicit);
 311             }
 312             else
 313             {
 314                 Dispose(true);
 315             }
 316             GC.SuppressFinalize(this);
 317         }
 318
 319         /// <summary>
 320         /// Hidden API (Inhouse API).
 321         /// Dispose.
 322         /// </summary>
 323         /// <remarks>
 324         /// Following the guide of https://docs.microsoft.com/en-us/dotnet/standard/garbage-collection/implementing-dispose.
 325         /// This will replace "protected virtual void Dispose(DisposeTypes type)" which is exactly same in functionality.
 326         /// </remarks>
 327         /// <param name="disposing">true in order to free managed objects</param>
 328         // Protected implementation of Dispose pattern.
 329         [EditorBrowsable(EditorBrowsableState.Never)]
 330         protected virtual void Dispose(bool disposing)
 331         {
 332             if (disposed)
 333             {
 334                 return;
 335             }
 336
 337             if (disposing)
 338             {
 339                 // TODO: dispose managed state (managed objects).
 340                 // Explicit call. user calls Dispose()
 341
 342                 //Throw exception if Dispose() is called in separate thread.
 343                 if (!Window.IsInstalled())
 344                 {
 345                     var process = global::System.Diagnostics.Process.GetCurrentProcess().Id;
 346                     var thread = global::System.Threading.Thread.CurrentThread.ManagedThreadId;
 347                     var me = this.GetType().FullName;
 348
 349                     DebugFileLogging.Instance.WriteLog("[NUI][BaseHandle] This API called from separate thread. This API must be called from MainThread. \n" +
 350                         $" process:{process} thread:{thread}, disposing:{disposing}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me}\n");
 351
 352                     Tizen.Log.Fatal("NUI", $"[NUI][BaseHandle] This API called from separate thread. This API must be called from MainThread. \n" +
 353                         $" process:{process} thread:{thread}, disposing:{disposing}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me}\n");
 354
 355                     //to fix ArtApp black screen issue. this will be enabled after talking with ArtApp team and fixing it.
 356                     // throw new global::System.InvalidOperationException("[NUI][BaseHandle] This API called from separate thread. This API must be called from MainThread. \n" +
 357                     //     $" process:{process} thread:{thread}, disposing:{disposing}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me}\n");
 358                 }
 359
 360                 if (isDisposeQueued)
 361                 {
 362                     DebugFileLogging.Instance.WriteLog($"should not be here! (dead code) this will be removed!");
 363
 364                     Tizen.Log.Fatal("NUI", $"[NUI] should not be here! (dead code) this will be removed!");
 365
 366                     //to fix ArtApp black screen issue. this will be enabled after talking with ArtApp team and fixing it.
 367                     // throw new global::System.Exception($"[NUI] should not be here! (dead code) this will be removed!");
 368                     Dispose(DisposeTypes.Implicit);
 369                 }
 370                 else
 371                 {
 372                     Dispose(DisposeTypes.Explicit);
 373                 }
 374             }
 375             else
 376             {
 377                 // Implicit call. user doesn't call Dispose(), so this object is added into DisposeQueue to be disposed automatically.
 378                 if (!isDisposeQueued)
 379                 {
 380                     isDisposeQueued = true;
 381                     DisposeQueue.Instance.Add(this);
 382                 }
 383             }
 384
 385             // TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.
 386             // TODO: set large fields to null.
 387         }
 388
 389
 390         /// <summary>
 391         /// Performs an action on this object with the given action name and attributes.
 392         /// </summary>
 393         /// <param name="actionName">The command for the action.</param>
 394         /// <param name="attributes">The list of attributes for the action.</param>
 395         /// <returns>The action is performed by the object or not.</returns>
 396         /// <since_tizen> 3 </since_tizen>
 397         public bool DoAction(string actionName, PropertyMap attributes)
 398         {
 399             bool ret = Interop.BaseHandle.DoAction(swigCPtrCopy, actionName, PropertyMap.getCPtr(attributes));
 400             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 401             return ret;
 402         }
 403
 404         /// <summary>
 405         /// Returns the type name for the Handle.<br />
 406         /// Will return an empty string if the typename does not exist. This will happen for types that
 407         /// have not registered with type-registry.
 408         /// </summary>
 409         /// <returns>The type name. Empty string if the typename does not exist.</returns>
 410         /// <since_tizen> 3 </since_tizen>
 411         public string GetTypeName()
 412         {
 413             string ret = Interop.BaseHandle.GetTypeName(swigCPtrCopy);
 414             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 415             return ret;
 416         }
 417
 418         /// <summary>
 419         /// Returns the type info for the Handle.<br />
 420         /// </summary>
 421         /// <param name="info">The type information.</param>
 422         /// <returns>True If get the type info.</returns>
 423         /// <since_tizen> 3 </since_tizen>
 424         public bool GetTypeInfo(Tizen.NUI.TypeInfo info)
 425         {
 426             bool ret = Interop.BaseHandle.GetTypeInfo(swigCPtrCopy, Tizen.NUI.TypeInfo.getCPtr(info));
 427             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 428             return ret;
 429         }
 430
 431         /// <summary>
 432         /// Resets the handle.
 433         /// </summary>
 434         /// <since_tizen> 3 </since_tizen>
 435         /// <remark>
 436         /// This will be deprecated, please use Dispose() instead.
 437         /// </remark>
 438         public void Reset()
 439         {
 440             this.Dispose();
 441             NUILog.Error("[ERROR] This(BaseHandle.Reset) will be deprecated, please use Dispose() instead!");
 442         }
 443
 444         /// <summary>
 445         /// To check the BaseHandle instance is equal or not.
 446         /// </summary>
 447         /// <param name="rhs">The baseHandle instance.</param>
 448         /// <returns>True If equal.</returns>
 449         /// <since_tizen> 3 </since_tizen>
 450         public bool EqualTo(BaseHandle rhs)
 451         {
 452             bool ret = Interop.BaseHandle.EqualTo(swigCPtrCopy, BaseHandle.getCPtr(rhs));
 453             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 454             return ret;
 455         }
 456
 457         /// <summary>
 458         /// To check the BaseHandle instance is equal or not.
 459         /// </summary>
 460         /// <param name="rhs">The baseHandle instance.</param>
 461         /// <returns>True If not equal.</returns>
 462         /// <since_tizen> 3 </since_tizen>
 463         public bool NotEqualTo(BaseHandle rhs)
 464         {
 465             bool ret = Interop.BaseHandle.NotEqualTo(swigCPtrCopy, BaseHandle.getCPtr(rhs));
 466             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 467             return ret;
 468         }
 469
 470         /// <summary>
 471         /// To check the BaseHandle instance has body or not.
 472         /// </summary>
 473         /// <returns>True If the baseHandle instance has body.</returns>
 474         /// <since_tizen> 3 </since_tizen>
 475         public bool HasBody()
 476         {
 477             if (swigCPtrCopy.Handle == IntPtr.Zero)
 478             {
 479                 return false;
 480             }
 481
 482             if (disposed == true)
 483             {
 484                 return false;
 485             }
 486             bool ret = Interop.BaseHandle.HasBody(swigCPtrCopy);
 487             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 488             return ret;
 489         }
 490
 491         /// <summary>
 492         /// To check the BaseHandle instance is equal or not.
 493         /// </summary>
 494         /// <param name="rhs">The baseHandle instance.</param>
 495         /// <returns>True If equal.</returns>
 496         /// <since_tizen> 3 </since_tizen>
 497         public bool IsEqual(BaseHandle rhs)
 498         {
 499             if (disposed == true || rhs == null || !rhs.HasBody())
 500             {
 501                 return false;
 502             }
 503
 504             bool ret = Interop.BaseHandle.IsEqual(swigCPtrCopy, BaseHandle.getCPtr(rhs));
 505             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 506             return ret;
 507         }
 508
 509         internal static global::System.Runtime.InteropServices.HandleRef getCPtr(BaseHandle obj)
 510         {
 511             return (obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtrCopy;
 512         }
 513
 514         internal void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
 515         {
 516             PropertySet?.Invoke(this, new PropertyChangedEventArgs(propertyName));
 517         }
 518
 519         /// <summary>
 520         /// Dispose.
 521         /// </summary>
 522         /// <since_tizen> 3 </since_tizen>
 523         protected virtual void Dispose(DisposeTypes type)
 524         {
 525             if (disposed)
 526             {
 527                 return;
 528             }
 529
 530             DebugFileLogging.Instance.WriteLog($"BaseHandle.Dispose({type}) START");
 531
 532             if (type == DisposeTypes.Explicit)
 533             {
 534                 //Called by User
 535                 //Release your own managed resources here.
 536                 //You should release all of your own disposable objects here.
 537
 538             }
 539
 540             //Release your own unmanaged resources here.
 541             //You should not access any managed member here except static instance.
 542             //because the execution order of Finalizes is non-deterministic.
 543
 544             //Unreference this instance from Registry.
 545             if (registerMe)
 546             {
 547                 Registry.Unregister(this);
 548             }
 549
 550             disposeDebuggingDispose(type);
 551
 552             if (SwigCPtr.Handle != IntPtr.Zero)
 553             {
 554                 if (swigCMemOwn)
 555                 {
 556                     swigCMemOwn = false;
 557                     ReleaseSwigCPtr(SwigCPtr);
 558                 }
 559                 swigCPtr = new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero);
 560             }
 561             else
 562             {
 563                 var me = this.GetType().FullName;
 564                 DebugFileLogging.Instance.WriteLog($"[ERR] SwigCPtr is NULL, need to check! me:{me}");
 565                 Log.Error("NUI", $"[ERR] SwigCPtr is NULL, need to check! me:{me}");
 566             }
 567
 568             if (swigCPtrCopy.Handle != global::System.IntPtr.Zero)
 569             {
 570                 swigCMemOwn = false;
 571                 Interop.BaseHandle.DeleteBaseHandle(swigCPtrCopy);
 572                 swigCPtrCopy = new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero);
 573             }
 574             else
 575             {
 576                 var me = this.GetType().FullName;
 577                 DebugFileLogging.Instance.WriteLog($"[ERR] swigCPtrCopy is NULL, need to check! me:{me}");
 578                 Log.Error("NUI", $"[ERR] swigCPtrCopy is NULL, need to check! me:{me}");
 579             }
 580
 581             disposed = true;
 582             DebugFileLogging.Instance.WriteLog($"BaseHandle.Dispose({type}) END");
 583             DebugFileLogging.Instance.WriteLog($"=============================");
 584             NUILog.Debug($"BaseHandle.Dispose({type}) END");
 585             NUILog.Debug($"=============================");
 586         }
 587
 588         /// <summary>
 589         /// Release swigCPtr.
 590         /// </summary>
 591         /// <since_tizen> 6 </since_tizen>
 592         /// This will not be public opened.
 593         [EditorBrowsable(EditorBrowsableState.Never)]
 594         protected virtual void ReleaseSwigCPtr(System.Runtime.InteropServices.HandleRef swigCPtr)
 595         {
 596         }
 597
 598         /// <summary>
 599         /// Contains event arguments for the FocusChangeRequested event.
 600         /// </summary>
 601         [Obsolete("Deprecated in API9; Will be removed in API11.")]
 602         public class FocusRequestArgs : EventArgs
 603         {
 604
 605             /// <summary>
 606             /// Gets or sets a value that indicates the starting focus state of the element for which a focus change is requested.
 607             /// </summary>
 608             public bool Focus { get; set; }
 609
 610             /// <summary>
 611             /// Gets or sets a value that indicates the ending focus state of the element for which a focus change is requested.
 612             /// </summary>
 613             public bool Result { get; set; }
 614         }
 615
 616         internal global::System.Runtime.InteropServices.HandleRef SwigCPtr
 617         {
 618             get
 619             {
 620                 if (swigCPtr.Handle == IntPtr.Zero)
 621                 {
 622                     var process = global::System.Diagnostics.Process.GetCurrentProcess().Id;
 623                     var thread = global::System.Threading.Thread.CurrentThread.ManagedThreadId;
 624                     var me = this.GetType().FullName;
 625
 626                     Tizen.Log.Fatal("NUI", $"SwigCPtr Error! NUI's native dali object is already disposed. " +
 627                         $"OR the native dali object handle of NUI becomes null! \n" +
 628                         $" process:{process} thread:{thread}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me}\n");
 629
 630                     Tizen.Log.Fatal("NUI", $"[ERROR] back trace!");
 631                     global::System.Diagnostics.StackTrace st = new global::System.Diagnostics.StackTrace(true);
 632                     for (int i = 0; i < st.FrameCount; i++)
 633                     {
 634                         global::System.Diagnostics.StackFrame sf = st.GetFrame(i);
 635                         Tizen.Log.Fatal("NUI", " Method " + sf.GetMethod());
 636                     }
 637                     Tizen.Log.Fatal("NUI", "Error! just return here with null swigCPtr! this can cause unknown error or crash in next step");
 638
 639                     //to fix ArtApp black screen issue. this will be enabled after talking with ArtApp team and fixing it.
 640                     // throw new ObjectDisposedException(nameof(SwigCPtr), $"Error! NUI's native dali object is already disposed. " +
 641                     //     $"OR the native dali object handle of NUI becomes null! \n" +
 642                     //     $" process:{process} thread:{thread}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me}\n");
 643                 }
 644                 return swigCPtr;
 645             }
 646         }
 647
 648         internal bool IsNativeHandleInvalid()
 649         {
 650             return swigCPtr.Handle == IntPtr.Zero;
 651         }
 652
 653         /// <summary>
 654         /// swigCMemOwn
 655         /// </summary>
 656         [EditorBrowsable(EditorBrowsableState.Never)]
 657         protected internal bool SwigCMemOwn => swigCMemOwn;
 658
 659         /// <summary>
 660         /// The flag to check if it is already disposed of.
 661         /// </summary>
 662         [EditorBrowsable(EditorBrowsableState.Never)]
 663         protected internal bool Disposed => disposed;
 664
 665         /// <summary>
 666         /// The flag to check if it is disposed by DisposeQueue.
 667         /// </summary>
 668         [EditorBrowsable(EditorBrowsableState.Never)]
 669         protected internal bool IsDisposeQueued => isDisposeQueued;
 670
 671         [Conditional("NUI_DISPOSE_DEBUG_ON")]
 672         private void disposeDebuggingCtor()
 673         {
 674             DebugFileLogging.Instance.WriteLog($"type:{GetType()} copyNativeHandle:{swigCPtrCopy.Handle.ToString("X8")}");
 675             if (this is BaseComponents.View view)
 676             {
 677                 DebugFileLogging.Instance.WriteLog($"ID:{view.ID} Name:{view.Name}");
 678                 //back trace
 679                 global::System.Diagnostics.StackTrace st = new global::System.Diagnostics.StackTrace(true);
 680                 for (int i = 0; i < st.FrameCount; i++)
 681                 {
 682                     global::System.Diagnostics.StackFrame sf = st.GetFrame(i);
 683                     DebugFileLogging.Instance.WriteLog($"[{i}] {sf.GetMethod()}");
 684                 }
 685             }
 686         }
 687
 688         [Conditional("NUI_DISPOSE_DEBUG_ON")]
 689         private void disposeDebuggingDispose(DisposeTypes type)
 690         {
 691             DebugFileLogging.Instance.WriteLog($"swigCMemOwn:{swigCMemOwn} type:{GetType()} copyNativeHandle:{swigCPtrCopy.Handle.ToString("X8")} HasBody:{HasBody()}");
 692
 693             if (swigCPtr.Handle != IntPtr.Zero && swigCPtrCopy.Handle != IntPtr.Zero && HasBody())
 694             {
 695                 using var currentProcess = global::System.Diagnostics.Process.GetCurrentProcess();
 696                 var process = currentProcess.Id;
 697                 var thread = global::System.Threading.Thread.CurrentThread.ManagedThreadId;
 698                 var me = this.GetType().FullName;
 699                 var daliId = "unknown";
 700                 var hash = this.GetType().GetHashCode();
 701                 var name = "unknown";
 702
 703                 if (this is BaseComponents.View)
 704                 {
 705                     daliId = Interop.Actor.GetId(swigCPtrCopy).ToString();
 706                     name = Interop.Actor.GetName(swigCPtrCopy);
 707                     BaseObject tmp = new BaseObject(Interop.BaseHandle.GetBaseObject(swigCPtrCopy), false);
 708                     var refCnt = tmp.ReferenceCount();
 709                     tmp.Dispose();
 710                     if (refCnt > 2)
 711                     {
 712                         DebugFileLogging.Instance.WriteLog($"[ERR] reference count is over than 2. Could be a memory leak. Need to check! \n" +
 713                             $" process:{process} thread:{thread}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me} \n" +
 714                             $" disposeType:{type}, name:{name}, daliID:{daliId}, hash:{hash}, refCnt:{refCnt}");
 715
 716                         Log.Error("NUI", $"[ERR] reference count is over than 2. Could be a memory leak. Need to check! \n" +
 717                             $" process:{process} thread:{thread}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me} \n" +
 718                             $" disposeType:{type}, name:{name}, daliID:{daliId}, hash:{hash}, refCnt:{refCnt}");
 719                     }
 720                 }
 721             }
 722         }
 723
 724     }
 725 }