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

   1 /*
   2  * Copyright(c) 2021 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
  22 namespace Tizen.NUI
  23 {
  24     /// <summary>
  25     /// BaseHandle is a handle to an internal Dali resource.
  26     /// </summary>
  27     /// <since_tizen> 3 </since_tizen>
  28     public class BaseHandle : Element, global::System.IDisposable
  29     {
  30         /// <summary>
  31         /// swigCMemOwn
  32         /// </summary>
  33         /// <since_tizen> 3 </since_tizen>
  34         [Obsolete("Deprecated in API9, Will be removed in API11, Please use SwigCMemOwn")]
  35         [System.Diagnostics.CodeAnalysis.SuppressMessage("Design", "CA1051:Do not declare visible instance fields", Justification = "<Pending>")]
  36         protected bool swigCMemOwn;
  37
  38         /// <summary>
  39         /// A flag to check if it is already disposed.
  40         /// </summary>
  41         /// <since_tizen> 3 </since_tizen>
  42         [Obsolete("Deprecated in API9, Will be removed in API11, Please use Disposed")]
  43         [System.Diagnostics.CodeAnalysis.SuppressMessage("Design", "CA1051:Do not declare visible instance fields", Justification = "<Pending>")]
  44         protected bool disposed = false;
  45
  46         private global::System.Runtime.InteropServices.HandleRef swigCPtr;
  47         private global::System.Runtime.InteropServices.HandleRef swigCPtrCopy;
  48         private bool registerMe;
  49
  50         //A Flag to check who called Dispose(). (By User or DisposeQueue)
  51         private bool isDisposeQueued = false;
  52
  53         /// <summary>
  54         /// Create an instance of BaseHandle.
  55         /// </summary>
  56         /// <since_tizen> 3 </since_tizen>
  57         public BaseHandle() : this(Interop.BaseHandle.NewBaseHandle())
  58         {
  59             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  60         }
  61
  62         /// <summary>
  63         /// Create an instance of BaseHandle.
  64         /// </summary>
  65         /// <param name="handle">The BaseHandle instance.</param>
  66         /// <since_tizen> 3 </since_tizen>
  67         public BaseHandle(BaseHandle handle) : this(Interop.BaseHandle.NewBaseHandle(BaseHandle.getCPtr(handle)))
  68         {
  69             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  70         }
  71
  72         internal BaseHandle(global::System.IntPtr cPtr, bool cMemoryOwn)
  73         {
  74             //to catch derived classes dali native exceptions
  75             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  76
  77             DebugFileLogging.Instance.WriteLog($"BaseHandle.contructor with cMemeryOwn:{cMemoryOwn} START");
  78
  79             registerMe = swigCMemOwn = cMemoryOwn;
  80             swigCPtr = new global::System.Runtime.InteropServices.HandleRef(this, cPtr);
  81             // using copy constructor to create another native handle so Registry.Unregister works fine.
  82             swigCPtrCopy = new global::System.Runtime.InteropServices.HandleRef(this, Interop.BaseHandle.NewBaseHandle(swigCPtr));
  83             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  84
  85             if (registerMe)
  86             {
  87                 // Register this instance of BaseHandle in the registry.
  88                 Registry.Register(this);
  89             }
  90
  91             DebugFileLogging.Instance.WriteLog($"type:{GetType()} copyNativeHandle:{swigCPtrCopy.Handle.ToString("X8")}");
  92             if (this is BaseComponents.View view)
  93             {
  94                   DebugFileLogging.Instance.WriteLog($"ID:{view.ID} Name:{view.Name}");
  95             }
  96             DebugFileLogging.Instance.WriteLog($" BaseHandle.contructor with cMemeryOwn END");
  97             DebugFileLogging.Instance.WriteLog($"=============================");
  98         }
  99
 100         internal BaseHandle(global::System.IntPtr cPtr)
 101         {
 102             DebugFileLogging.Instance.WriteLog($"BaseHandle.contructor START");
 103
 104             registerMe = swigCMemOwn = true;
 105
 106             swigCPtr = new global::System.Runtime.InteropServices.HandleRef(this, cPtr);
 107
 108             // using copy constructor to create another native handle so Registry.Unregister works fine.
 109             swigCPtrCopy = new global::System.Runtime.InteropServices.HandleRef(this, Interop.BaseHandle.NewBaseHandle(SwigCPtr));
 110             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 111
 112             if (registerMe)
 113             {
 114                 // Register this instance of BaseHandle in the registry.
 115                 Registry.Register(this);
 116             }
 117
 118             DebugFileLogging.Instance.WriteLog($"type:{GetType()} copyNativeHandle:{swigCPtrCopy.Handle.ToString("X8")}");
 119             if (this is BaseComponents.View view)
 120             {
 121                 DebugFileLogging.Instance.WriteLog($"ID:{view.ID} Name:{view.Name}");
 122             }
 123             DebugFileLogging.Instance.WriteLog($"BaseHandle.contructor END");
 124             DebugFileLogging.Instance.WriteLog($"=============================");
 125         }
 126
 127         /// <summary>
 128         /// Dispose.
 129         /// </summary>
 130         /// <since_tizen> 3 </since_tizen>
 131         // following this guide: https://docs.microsoft.com/ko-kr/dotnet/fundamentals/code-analysis/quality-rules/ca1063?view=vs-2019 (CA1063)
 132         ~BaseHandle() => Dispose(false);
 133
 134         /// <summary>
 135         /// Event when a property is set.
 136         /// </summary>
 137         /// <since_tizen> 5 </since_tizen>
 138         /// <seealso cref="BindableObject.PropertyChanged"/>
 139         [Obsolete("Deprecated in API9, Will be removed in API11, Please use BindableObject.PropertyChanged instead!")]
 140         public event PropertyChangedEventHandler PropertySet;
 141
 142         internal global::System.Runtime.InteropServices.HandleRef GetBaseHandleCPtrHandleRef
 143         {
 144             get
 145             {
 146                 return swigCPtrCopy;
 147             }
 148         }
 149
 150         /// <summary>
 151         /// Returns the bool value true to indicate that an operand is true and returns false otherwise.
 152         /// </summary>
 153         /// <since_tizen> 3 </since_tizen>
 154         public static bool operator true(BaseHandle handle)
 155         {
 156             // if the C# object is null, return false
 157             if (BaseHandle.ReferenceEquals(handle, null))
 158             {
 159                 return false;
 160             }
 161             // returns true if the handle has a body, false otherwise
 162             return handle.HasBody();
 163         }
 164
 165         /// <summary>
 166         /// Returns the bool false  to indicate that an operand is false and returns true otherwise.
 167         /// </summary>
 168         /// <since_tizen> 3 </since_tizen>
 169         public static bool operator false(BaseHandle handle)
 170         {
 171             // if the C# object is null, return true
 172             if (BaseHandle.ReferenceEquals(handle, null))
 173             {
 174                 return true;
 175             }
 176             return !handle.HasBody();
 177         }
 178
 179         /// <summary>
 180         /// Explicit conversion from Handle to bool.
 181         /// </summary>
 182         /// <since_tizen> 3 </since_tizen>
 183         public static explicit operator bool(BaseHandle handle)
 184         {
 185             // if the C# object is null, return false
 186             if (BaseHandle.ReferenceEquals(handle, null))
 187             {
 188                 return false;
 189             }
 190             // returns true if the handle has a body, false otherwise
 191             return handle.HasBody();
 192         }
 193
 194         /// <summary>
 195         /// Equality operator
 196         /// </summary>
 197         /// <since_tizen> 3 </since_tizen>
 198         public static bool operator ==(BaseHandle x, BaseHandle y)
 199         {
 200             // if the C# objects are the same return true
 201             if (BaseHandle.ReferenceEquals(x, y))
 202             {
 203                 return true;
 204             }
 205             if (!BaseHandle.ReferenceEquals(x, null) && !BaseHandle.ReferenceEquals(y, null))
 206             {
 207                 // drop into native code to see if both handles point to the same body
 208                 return x.IsEqual(y);
 209             }
 210
 211             if (BaseHandle.ReferenceEquals(x, null) && !BaseHandle.ReferenceEquals(y, null))
 212             {
 213                 if (y.HasBody()) return false;
 214                 else return true;
 215             }
 216             if (!BaseHandle.ReferenceEquals(x, null) && BaseHandle.ReferenceEquals(y, null))
 217             {
 218                 if (x.HasBody()) return false;
 219                 else return true;
 220             }
 221
 222             return false;
 223         }
 224
 225         /// <summary>
 226         /// Inequality operator. Returns Null if either operand is Null
 227         /// </summary>
 228         /// <since_tizen> 3 </since_tizen>
 229         public static bool operator !=(BaseHandle x, BaseHandle y)
 230         {
 231             return !(x == y);
 232         }
 233
 234         /// <summary>
 235         /// Logical AND operator.<br />
 236         /// It's possible when doing a  operator this function (opBitwiseAnd) is never called due to short circuiting.<br />
 237         /// </summary>
 238         /// <since_tizen> 3 </since_tizen>
 239         public static BaseHandle operator &(BaseHandle x, BaseHandle y)
 240         {
 241             if (x == y)
 242             {
 243                 return x;
 244             }
 245             return null;
 246         }
 247
 248         /// <summary>
 249         /// Logical OR operator for ||.<br />
 250         /// It's possible when doing a || this function (opBitwiseOr) is never called due to short circuiting.<br />
 251         /// </summary>
 252         /// <since_tizen> 3 </since_tizen>
 253         public static BaseHandle operator |(BaseHandle x, BaseHandle y)
 254         {
 255             if (!BaseHandle.ReferenceEquals(x, null) || !BaseHandle.ReferenceEquals(y, null))
 256             {
 257                 if (x != null && x.HasBody())
 258                 {
 259                     return x;
 260                 }
 261                 if (y != null && y.HasBody())
 262                 {
 263                     return y;
 264                 }
 265                 return null;
 266             }
 267             return null;
 268         }
 269
 270         /// <summary>
 271         /// Logical ! operator
 272         /// </summary>
 273         /// <since_tizen> 3 </since_tizen>
 274         public static bool operator !(BaseHandle x)
 275         {
 276             // if the C# object is null, return true
 277             if (BaseHandle.ReferenceEquals(x, null))
 278             {
 279                 return true;
 280             }
 281             if (x.HasBody())
 282             {
 283                 return false;
 284             }
 285             return true;
 286         }
 287
 288         /// <summary>
 289         /// Equals
 290         /// </summary>
 291         /// <param name="o">The object should be compared.</param>
 292         /// <returns>True if equal.</returns>
 293         /// <since_tizen> 5 </since_tizen>
 294         public override bool Equals(object o)
 295         {
 296             return base.Equals(o);
 297         }
 298
 299         /// <summary>
 300         /// Gets the hash code of this baseHandle.
 301         /// </summary>
 302         /// <returns>The hash code.</returns>
 303         /// <since_tizen> 5 </since_tizen>
 304         public override int GetHashCode()
 305         {
 306             return base.GetHashCode();
 307         }
 308
 309         /// <summary>
 310         /// Dispose.
 311         /// </summary>
 312         /// <since_tizen> 3 </since_tizen>
 313         public void Dispose()
 314         {
 315             if (isDisposeQueued)
 316             {
 317                 Dispose(DisposeTypes.Implicit);
 318             }
 319             else
 320             {
 321                 Dispose(true);
 322             }
 323             GC.SuppressFinalize(this);
 324         }
 325
 326         /// <summary>
 327         /// Hidden API (Inhouse API).
 328         /// Dispose.
 329         /// </summary>
 330         /// <remarks>
 331         /// Following the guide of https://docs.microsoft.com/en-us/dotnet/standard/garbage-collection/implementing-dispose.
 332         /// This will replace "protected virtual void Dispose(DisposeTypes type)" which is exactly same in functionality.
 333         /// </remarks>
 334         /// <param name="disposing">true in order to free managed objects</param>
 335         // Protected implementation of Dispose pattern.
 336         [EditorBrowsable(EditorBrowsableState.Never)]
 337         protected virtual void Dispose(bool disposing)
 338         {
 339             if (disposed)
 340             {
 341                 return;
 342             }
 343
 344             if (disposing)
 345             {
 346                 // TODO: dispose managed state (managed objects).
 347                 // Explicit call. user calls Dispose()
 348
 349                 //Throw exception if Dispose() is called in separate thread.
 350                 if (!Window.IsInstalled())
 351                 {
 352                     var process = global::System.Diagnostics.Process.GetCurrentProcess().Id;
 353                     var thread = global::System.Threading.Thread.CurrentThread.ManagedThreadId;
 354                     var me = this.GetType().FullName;
 355
 356                     DebugFileLogging.Instance.WriteLog("[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                     throw new global::System.InvalidOperationException("[NUI][BaseHandle] This API called from separate thread. This API must be called from MainThread. \n" +
 360                         $" process:{process} thread:{thread}, disposing:{disposing}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me}\n");
 361                 }
 362
 363                 if (isDisposeQueued)
 364                 {
 365                     DebugFileLogging.Instance.WriteLog($"should not be here! (dead code) this will be removed!");
 366
 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         public void Reset()
 436         {
 437             Interop.BaseHandle.Reset(swigCPtrCopy);
 438             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 439         }
 440
 441         /// <summary>
 442         /// To check the BaseHandle instance is equal or not.
 443         /// </summary>
 444         /// <param name="rhs">The baseHandle instance.</param>
 445         /// <returns>True If equal.</returns>
 446         /// <since_tizen> 3 </since_tizen>
 447         public bool EqualTo(BaseHandle rhs)
 448         {
 449             bool ret = Interop.BaseHandle.EqualTo(swigCPtrCopy, BaseHandle.getCPtr(rhs));
 450             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 451             return ret;
 452         }
 453
 454         /// <summary>
 455         /// To check the BaseHandle instance is equal or not.
 456         /// </summary>
 457         /// <param name="rhs">The baseHandle instance.</param>
 458         /// <returns>True If not equal.</returns>
 459         /// <since_tizen> 3 </since_tizen>
 460         public bool NotEqualTo(BaseHandle rhs)
 461         {
 462             bool ret = Interop.BaseHandle.NotEqualTo(swigCPtrCopy, BaseHandle.getCPtr(rhs));
 463             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 464             return ret;
 465         }
 466
 467         /// <summary>
 468         /// To check the BaseHandle instance has body or not.
 469         /// </summary>
 470         /// <returns>True If the baseHandle instance has body.</returns>
 471         /// <since_tizen> 3 </since_tizen>
 472         public bool HasBody()
 473         {
 474             if (swigCPtrCopy.Handle == IntPtr.Zero)
 475             {
 476                 return false;
 477             }
 478
 479             if (disposed == true)
 480             {
 481                 return false;
 482             }
 483             bool ret = Interop.BaseHandle.HasBody(swigCPtrCopy);
 484             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 485             return ret;
 486         }
 487
 488         /// <summary>
 489         /// To check the BaseHandle instance is equal or not.
 490         /// </summary>
 491         /// <param name="rhs">The baseHandle instance.</param>
 492         /// <returns>True If equal.</returns>
 493         /// <since_tizen> 3 </since_tizen>
 494         public bool IsEqual(BaseHandle rhs)
 495         {
 496             if (disposed == true)
 497             {
 498                 return false;
 499             }
 500
 501             bool ret = Interop.BaseHandle.IsEqual(swigCPtrCopy, BaseHandle.getCPtr(rhs));
 502             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 503             return ret;
 504         }
 505
 506         internal static global::System.Runtime.InteropServices.HandleRef getCPtr(BaseHandle obj)
 507         {
 508             return (obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtrCopy;
 509         }
 510
 511         internal void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
 512         {
 513             PropertySet?.Invoke(this, new PropertyChangedEventArgs(propertyName));
 514         }
 515
 516         /// <summary>
 517         /// Dispose.
 518         /// </summary>
 519         /// <since_tizen> 3 </since_tizen>
 520         protected virtual void Dispose(DisposeTypes type)
 521         {
 522             if (disposed)
 523             {
 524                 return;
 525             }
 526
 527             DebugFileLogging.Instance.WriteLog($"BaseHandle.Dispose({type}) START");
 528
 529             if (type == DisposeTypes.Explicit)
 530             {
 531                 //Called by User
 532                 //Release your own managed resources here.
 533                 //You should release all of your own disposable objects here.
 534
 535             }
 536
 537             //Release your own unmanaged resources here.
 538             //You should not access any managed member here except static instance.
 539             //because the execution order of Finalizes is non-deterministic.
 540
 541             //Unreference this instance from Registry.
 542             if (registerMe)
 543             {
 544                 Registry.Unregister(this);
 545             }
 546
 547             DebugFileLogging.Instance.WriteLog($"swigCMemOwn:{swigCMemOwn} type:{GetType()} copyNativeHandle:{swigCPtrCopy.Handle.ToString("X8")}");
 548
 549             // this is temporary test code. will be removed laster
 550             {
 551                 if (swigCPtr.Handle != IntPtr.Zero && swigCPtrCopy.Handle != IntPtr.Zero)
 552                 {
 553                     var process = global::System.Diagnostics.Process.GetCurrentProcess().Id;
 554                     var thread = global::System.Threading.Thread.CurrentThread.ManagedThreadId;
 555                     var me = this.GetType().FullName;
 556                     var daliId = "unknown";
 557                     var hash = this.GetType().GetHashCode();
 558                     var name = "unknown";
 559
 560                     if (this is BaseComponents.View)
 561                     {
 562                         daliId = Interop.Actor.GetId(swigCPtrCopy).ToString();
 563                         name = Interop.Actor.GetName(swigCPtrCopy);
 564                         BaseObject tmp = new BaseObject(Interop.BaseHandle.GetBaseObject(swigCPtrCopy), false);
 565                         var refCnt = tmp.ReferenceCount();
 566                         tmp.Dispose();
 567                         if (refCnt > 2)
 568                         {
 569                             DebugFileLogging.Instance.WriteLog($"[ERR] reference count is over than 2. Could be a memory leak. Need to check! \n" +
 570                                 $" process:{process} thread:{thread}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me} \n" +
 571                                 $" disposeType:{type}, name:{name}, daliID:{daliId}, hash:{hash}, refCnt:{refCnt}");
 572
 573                             Log.Error("NUI", $"[ERR] reference count is over than 2. Could be a memory leak. Need to check! \n" +
 574                                 $" process:{process} thread:{thread}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me} \n" +
 575                                 $" disposeType:{type}, name:{name}, daliID:{daliId}, hash:{hash}, refCnt:{refCnt}");
 576                         }
 577                     }
 578                 }
 579             }
 580
 581             if (SwigCPtr.Handle != IntPtr.Zero)
 582             {
 583                 if (swigCMemOwn)
 584                 {
 585                     swigCMemOwn = false;
 586                     ReleaseSwigCPtr(SwigCPtr);
 587                 }
 588                 swigCPtr = new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero);
 589             }
 590             else
 591             {
 592                 var me = this.GetType().FullName;
 593                 DebugFileLogging.Instance.WriteLog($"[ERR] SwigCPtr is NULL, need to check! me:{me}");
 594                 Log.Error("NUI", $"[ERR] SwigCPtr is NULL, need to check! me:{me}");
 595             }
 596
 597             if (swigCPtrCopy.Handle != global::System.IntPtr.Zero)
 598             {
 599                 swigCMemOwn = false;
 600                 Interop.BaseHandle.DeleteBaseHandle(swigCPtrCopy);
 601                 swigCPtrCopy = new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero);
 602             }
 603             else
 604             {
 605                 var me = this.GetType().FullName;
 606                 DebugFileLogging.Instance.WriteLog($"[ERR] swigCPtrCopy is NULL, need to check! me:{me}");
 607                 Log.Error("NUI", $"[ERR] swigCPtrCopy is NULL, need to check! me:{me}");
 608             }
 609
 610             disposed = true;
 611
 612             if (null != Application.Current)
 613             {
 614                 Application.Current.XamlResourceChanged -= OnResourcesChanged;
 615             }
 616             DebugFileLogging.Instance.WriteLog($"BaseHandle.Dispose({type}) END");
 617             DebugFileLogging.Instance.WriteLog($"=============================");
 618             NUILog.Debug($"BaseHandle.Dispose({type}) END");
 619             NUILog.Debug($"=============================");
 620         }
 621
 622         /// <summary>
 623         /// Release swigCPtr.
 624         /// </summary>
 625         /// <since_tizen> 6 </since_tizen>
 626         /// This will not be public opened.
 627         [EditorBrowsable(EditorBrowsableState.Never)]
 628         protected virtual void ReleaseSwigCPtr(System.Runtime.InteropServices.HandleRef swigCPtr)
 629         {
 630         }
 631
 632         /// <summary>
 633         /// Contains event arguments for the FocusChangeRequested event.
 634         /// </summary>
 635         [Obsolete("Deprecated in API9; Will be removed in API11.")]
 636         public class FocusRequestArgs : EventArgs
 637         {
 638
 639             /// <summary>
 640             /// Gets or sets a value that indicates the starting focus state of the element for which a focus change is requested.
 641             /// </summary>
 642             public bool Focus { get; set; }
 643
 644             /// <summary>
 645             /// Gets or sets a value that indicates the ending focus state of the element for which a focus change is requested.
 646             /// </summary>
 647             public bool Result { get; set; }
 648         }
 649
 650         internal global::System.Runtime.InteropServices.HandleRef SwigCPtr
 651         {
 652             get
 653             {
 654                 if (swigCPtr.Handle == IntPtr.Zero)
 655                 {
 656                     var process = global::System.Diagnostics.Process.GetCurrentProcess().Id;
 657                     var thread = global::System.Threading.Thread.CurrentThread.ManagedThreadId;
 658                     var me = this.GetType().FullName;
 659
 660                     throw new ObjectDisposedException(nameof(SwigCPtr), $"Error! NUI's native dali object is already disposed. " +
 661                         $"OR the native dali object handle of NUI becomes null! \n" +
 662                         $" process:{process} thread:{thread}, isDisposed:{this.disposed}, isDisposeQueued:{this.isDisposeQueued}, me:{me}\n");
 663                 }
 664                 return swigCPtr;
 665             }
 666         }
 667
 668         internal bool IsNativeHandleInvalid()
 669         {
 670             return swigCPtr.Handle == IntPtr.Zero;
 671         }
 672
 673         /// <summary>
 674         /// swigCMemOwn
 675         /// </summary>
 676         [EditorBrowsable(EditorBrowsableState.Never)]
 677         protected internal bool SwigCMemOwn => swigCMemOwn;
 678
 679         /// <summary>
 680         /// A flag to check if it is already disposed.
 681         /// </summary>
 682         [EditorBrowsable(EditorBrowsableState.Never)]
 683         protected internal bool Disposed => disposed;
 684
 685         /// <summary>
 686         /// A flag to check if it is disposed by DisposeQueue.
 687         /// </summary>
 688         [EditorBrowsable(EditorBrowsableState.Never)]
 689         protected internal bool IsDisposeQueued => isDisposeQueued;
 690
 691     }
 692 }