-
Notifications
You must be signed in to change notification settings - Fork 507
/
NSObject2.cs
1237 lines (1086 loc) · 39.2 KB
/
NSObject2.cs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// Copyright 2011 - 2014 Xamarin Inc
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Diagnostics.CodeAnalysis;
using System.Reflection;
using System.Collections.Generic;
using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Threading;
#if !NO_SYSTEM_DRAWING
using System.Drawing;
#endif
using System.Runtime.Versioning;
using System.Diagnostics;
#if NET
using System.Runtime.InteropServices.ObjectiveC;
#endif
using ObjCRuntime;
#if !COREBUILD
using Xamarin.Bundler;
#if MONOTOUCH
using UIKit;
#if !WATCH
using CoreAnimation;
#endif
#endif
using CoreGraphics;
#endif
#if !NET
using NativeHandle = System.IntPtr;
#endif
// Disable until we get around to enable + fix any issues.
#nullable disable
namespace Foundation {
#if NET
[SupportedOSPlatform ("ios")]
[SupportedOSPlatform ("maccatalyst")]
[SupportedOSPlatform ("macos")]
[SupportedOSPlatform ("tvos")]
public enum NSObjectFlag {
Empty,
}
#else
public class NSObjectFlag {
public static readonly NSObjectFlag Empty;
NSObjectFlag () { }
}
#endif
#if NET
// This interface will be made public when the managed static registrar is used.
internal interface INSObjectFactory {
// The method will be implemented via custom linker step if the managed static registrar is used
// for NSObject subclasses which have an (NativeHandle) or (IntPtr) constructor.
[MethodImpl(MethodImplOptions.NoInlining)]
virtual static NSObject _Xamarin_ConstructNSObject (NativeHandle handle) => null;
}
#endif
#if NET && !COREBUILD
[ObjectiveCTrackedType]
[SupportedOSPlatform ("ios")]
[SupportedOSPlatform ("maccatalyst")]
[SupportedOSPlatform ("macos")]
[SupportedOSPlatform ("tvos")]
#endif
[StructLayout (LayoutKind.Sequential)]
public partial class NSObject : INativeObject
#if !COREBUILD
, IEquatable<NSObject>
, IDisposable
#endif
#if NET
, INSObjectFactory
#endif
{
#if !COREBUILD
const string selConformsToProtocol = "conformsToProtocol:";
const string selEncodeWithCoder = "encodeWithCoder:";
#if MONOMAC
static IntPtr selConformsToProtocolHandle = Selector.GetHandle (selConformsToProtocol);
static IntPtr selEncodeWithCoderHandle = Selector.GetHandle (selEncodeWithCoder);
#endif
// replace older Mono[Touch|Mac]Assembly field (ease code sharing across platforms)
public static readonly Assembly PlatformAssembly = typeof (NSObject).Assembly;
NativeHandle handle;
IntPtr super; /* objc_super* */
#if !NET
Flags flags;
#else
// See "Toggle-ref support for CoreCLR" in coreclr-bridge.m for more information.
Flags actual_flags;
internal unsafe Runtime.TrackedObjectInfo* tracked_object_info;
unsafe Flags flags {
get {
// Get back the InFinalizerQueue flag, it's the only flag we'll set in the tracked object info structure from native code.
// The InFinalizerQueue will never be cleared once set, so there's no need to unset it here if it's not set in the tracked_object_info structure.
if (tracked_object_info is not null && ((tracked_object_info->Flags) & Flags.InFinalizerQueue) == Flags.InFinalizerQueue)
actual_flags |= Flags.InFinalizerQueue;
return actual_flags;
}
set {
actual_flags = value;
// Update the flags value that we can access them from the toggle ref callback as well.
if (tracked_object_info is not null)
tracked_object_info->Flags = value;
}
}
#endif // NET
// This enum has a native counterpart in runtime.h
[Flags]
internal enum Flags : byte {
Disposed = 1,
NativeRef = 2,
IsDirectBinding = 4,
RegisteredToggleRef = 8,
InFinalizerQueue = 16,
HasManagedRef = 32,
// 64, // Used by SoM
IsCustomType = 128,
}
// Must be kept in sync with the same enum in trampolines.h
enum XamarinGCHandleFlags : uint {
None = 0,
WeakGCHandle = 1,
HasManagedRef = 2,
InitialSet = 4,
}
[StructLayout (LayoutKind.Sequential)]
struct objc_super {
public IntPtr Handle;
public IntPtr ClassHandle;
}
bool disposed {
get { return ((flags & Flags.Disposed) == Flags.Disposed); }
set { flags = value ? (flags | Flags.Disposed) : (flags & ~Flags.Disposed); }
}
bool HasManagedRef {
get { return (flags & Flags.HasManagedRef) == Flags.HasManagedRef; }
set { flags = value ? (flags | Flags.HasManagedRef) : (flags & ~Flags.HasManagedRef); }
}
internal bool IsRegisteredToggleRef {
get { return ((flags & Flags.RegisteredToggleRef) == Flags.RegisteredToggleRef); }
set { flags = value ? (flags | Flags.RegisteredToggleRef) : (flags & ~Flags.RegisteredToggleRef); }
}
[DebuggerBrowsable (DebuggerBrowsableState.Never)]
[EditorBrowsable (EditorBrowsableState.Never)]
protected internal bool IsDirectBinding {
get { return ((flags & Flags.IsDirectBinding) == Flags.IsDirectBinding); }
set { flags = value ? (flags | Flags.IsDirectBinding) : (flags & ~Flags.IsDirectBinding); }
}
internal bool InFinalizerQueue {
get { return ((flags & Flags.InFinalizerQueue) == Flags.InFinalizerQueue); }
}
bool IsCustomType {
get {
var value = (flags & Flags.IsCustomType) == Flags.IsCustomType;
if (!value) {
value = Class.IsCustomType (GetType ());
if (value)
flags |= Flags.IsCustomType;
}
return value;
}
}
[Export ("init")]
public NSObject ()
{
bool alloced = AllocIfNeeded ();
InitializeObject (alloced);
}
// This is just here as a constructor chain that can will
// only do Init at the most derived class.
public NSObject (NSObjectFlag x)
{
bool alloced = AllocIfNeeded ();
InitializeObject (alloced);
}
[EditorBrowsable (EditorBrowsableState.Never)]
#if NET
protected internal NSObject (NativeHandle handle)
#else
public NSObject (NativeHandle handle)
#endif
: this (handle, false)
{
}
[EditorBrowsable (EditorBrowsableState.Never)]
#if NET
protected NSObject (NativeHandle handle, bool alloced)
#else
public NSObject (NativeHandle handle, bool alloced)
#endif
{
this.handle = handle;
InitializeObject (alloced);
}
~NSObject ()
{
Dispose (false);
}
public void Dispose ()
{
Dispose (true);
GC.SuppressFinalize (this);
}
#if NET
// This method should never be called when using the managed static registrar, so assert that never happens by throwing an exception in that case.
// This method doesn't necessarily work with NativeAOT, but this is covered by the exception, because the managed static registrar is required for NativeAOT.
//
// IL2072: 'type' argument does not satisfy 'DynamicallyAccessedMemberTypes.PublicConstructors', 'DynamicallyAccessedMemberTypes.NonPublicConstructors' in call to 'System.Runtime.CompilerServices.RuntimeHelpers.GetUninitializedObject(Type)'. The return value of method 'ObjCRuntime.Runtime.GetGCHandleTarget(IntPtr)' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.
[UnconditionalSuppressMessage("", "IL2072", Justification = "The APIs this method tries to access are marked by other means, so this is linker-safe.")]
#endif
internal static IntPtr CreateNSObject (IntPtr type_gchandle, IntPtr handle, Flags flags)
{
#if NET
// Note that the code in this method doesn't necessarily work with NativeAOT, so assert that never happens by throwing an exception if using the managed static registrar (which is required for NativeAOT)
if (Runtime.IsManagedStaticRegistrar) {
throw new System.Diagnostics.UnreachableException ();
}
#endif
// This function is called from native code before any constructors have executed.
var type = (Type) Runtime.GetGCHandleTarget (type_gchandle);
try {
var obj = (NSObject) RuntimeHelpers.GetUninitializedObject (type);
obj.handle = handle;
obj.flags = flags;
return Runtime.AllocGCHandle (obj);
} catch (Exception e) {
throw ErrorHelper.CreateError (8041, e, Errors.MX8041 /* Unable to create an instance of the type {0} */, type.FullName);
}
}
NativeHandle GetSuper ()
{
if (super == NativeHandle.Zero) {
IntPtr ptr;
unsafe {
ptr = Marshal.AllocHGlobal (sizeof (objc_super));
*(objc_super*) ptr = default (objc_super); // zero fill
}
var previousValue = Interlocked.CompareExchange (ref super, ptr, IntPtr.Zero);
if (previousValue != IntPtr.Zero) {
// somebody beat us to the assignment.
Marshal.FreeHGlobal (ptr);
ptr = IntPtr.Zero;
}
}
unsafe {
objc_super* sup = (objc_super*) super;
if (sup->ClassHandle == NativeHandle.Zero)
sup->ClassHandle = ClassHandle;
sup->Handle = handle;
}
return super;
}
internal static NativeHandle Initialize ()
{
return class_ptr;
}
#if NET
internal Flags FlagsInternal {
get { return flags; }
set { flags = value; }
}
#endif
#if !NET || !__MACOS__
[MethodImplAttribute (MethodImplOptions.InternalCall)]
extern static void RegisterToggleRef (NSObject obj, IntPtr handle, bool isCustomType);
#endif // !NET || !__MACOS__
[DllImport ("__Internal")]
static extern void xamarin_release_managed_ref (IntPtr handle, byte user_type);
static void RegisterToggleReference (NSObject obj, IntPtr handle, bool isCustomType)
{
#if NET && __MACOS__
Runtime.RegisterToggleReferenceCoreCLR (obj, handle, isCustomType);
#elif NET
if (Runtime.IsCoreCLR) {
Runtime.RegisterToggleReferenceCoreCLR (obj, handle, isCustomType);
} else {
RegisterToggleRef (obj, handle, isCustomType);
}
#else
RegisterToggleRef (obj, handle, isCustomType);
#endif
}
#if !XAMCORE_3_0
[EditorBrowsable (EditorBrowsableState.Never)]
public static bool IsNewRefcountEnabled ()
{
return true;
}
#endif
/*
Register the current object with the toggleref machinery if the following conditions are met:
-The new refcounting is enabled; and
-The class is not a custom type - it must wrap a framework class.
*/
[EditorBrowsable (EditorBrowsableState.Never)]
protected void MarkDirty ()
{
MarkDirty (false);
}
internal void MarkDirty (bool allowCustomTypes)
{
if (IsRegisteredToggleRef)
return;
if (!allowCustomTypes && IsCustomType)
return;
IsRegisteredToggleRef = true;
RegisterToggleReference (this, Handle, allowCustomTypes);
}
private void InitializeObject (bool alloced)
{
if (alloced && handle == NativeHandle.Zero && Class.ThrowOnInitFailure) {
if (ClassHandle == NativeHandle.Zero)
throw new Exception ($"Could not create an native instance of the type '{GetType ().FullName}': the native class hasn't been loaded.\n{Constants.SetThrowOnInitFailureToFalse}.");
throw new Exception ($"Could not create an native instance of the type '{new Class (ClassHandle).Name}'.\n{Constants.SetThrowOnInitFailureToFalse}.");
}
// The authorative value for the IsDirectBinding value is the register attribute:
//
// [Register ("MyClass", true)] // the second parameter specifies the IsDirectBinding value
// class MyClass : NSObject {}
//
// Unfortunately looking up this attribute every time a class is instantiated is
// slow (since fetching attributes is slow), so we guess here: if the actual type
// of the object is in the platform assembly, then we assume IsDirectBinding=true:
//
// IsDirectBinding = (this.GetType ().Assembly == PlatformAssembly);
//
// and any subclasses in the platform assembly which is not a direct binding have
// to set the correct value in their constructors.
IsDirectBinding = (this.GetType ().Assembly == PlatformAssembly);
Runtime.RegisterNSObject (this, handle);
bool native_ref = (flags & Flags.NativeRef) == Flags.NativeRef;
CreateManagedRef (!alloced || native_ref);
}
[DllImport ("__Internal")]
static extern byte xamarin_set_gchandle_with_flags_safe (IntPtr handle, IntPtr gchandle, XamarinGCHandleFlags flags);
void CreateManagedRef (bool retain)
{
HasManagedRef = true;
bool isUserType = Runtime.IsUserType (handle);
if (isUserType) {
var flags = XamarinGCHandleFlags.HasManagedRef | XamarinGCHandleFlags.InitialSet | XamarinGCHandleFlags.WeakGCHandle;
var gchandle = GCHandle.Alloc (this, GCHandleType.WeakTrackResurrection);
var h = GCHandle.ToIntPtr (gchandle);
if (xamarin_set_gchandle_with_flags_safe (handle, h, flags) == 0) {
// A GCHandle already existed: this shouldn't happen, but let's handle it anyway.
Runtime.NSLog ($"Tried to create a managed reference from an object that already has a managed reference (type: {GetType ()})");
gchandle.Free ();
}
}
if (retain)
DangerousRetain ();
}
void ReleaseManagedRef ()
{
var handle = this.Handle; // Get a copy of the handle, because it will be cleared out when calling Runtime.NativeObjectHasDied, and we still need the handle later.
var user_type = Runtime.IsUserType (handle);
HasManagedRef = false;
if (!user_type) {
/* If we're a wrapper type, we need to unregister here, since we won't enter the release trampoline */
Runtime.NativeObjectHasDied (handle, this);
}
xamarin_release_managed_ref (handle, user_type.AsByte ());
FreeData ();
}
static bool IsProtocol (Type type, IntPtr protocol)
{
while (type != typeof (NSObject) && type is not null) {
var attrs = type.GetCustomAttributes (typeof (ProtocolAttribute), false);
var protocolAttribute = (ProtocolAttribute) (attrs.Length > 0 ? attrs [0] : null);
if (protocolAttribute is not null && !protocolAttribute.IsInformal) {
string name;
if (!string.IsNullOrEmpty (protocolAttribute.Name)) {
name = protocolAttribute.Name;
} else {
attrs = type.GetCustomAttributes (typeof (RegisterAttribute), false);
var registerAttribute = (RegisterAttribute) (attrs.Length > 0 ? attrs [0] : null);
if (registerAttribute is not null && !string.IsNullOrEmpty (registerAttribute.Name)) {
name = registerAttribute.Name;
} else {
name = type.Name;
}
}
var proto = Runtime.GetProtocol (name);
if (proto != IntPtr.Zero && proto == protocol)
return true;
}
type = type.BaseType;
}
return false;
}
[Preserve]
bool InvokeConformsToProtocol (NativeHandle protocol)
{
return ConformsToProtocol (protocol);
}
[Export ("conformsToProtocol:")]
[Preserve ()]
[BindingImpl (BindingImplOptions.Optimizable)]
public virtual bool ConformsToProtocol (NativeHandle protocol)
{
bool does;
bool is_wrapper = IsDirectBinding;
bool is_third_party;
if (is_wrapper) {
is_third_party = this.GetType ().Assembly != NSObject.PlatformAssembly;
if (is_third_party) {
// Third-party bindings might lie about IsDirectBinding (see bug #14772),
// so don't trust any 'true' values unless we're in monotouch.dll.
var attribs = this.GetType ().GetCustomAttributes (typeof (RegisterAttribute), false);
if (attribs is not null && attribs.Length == 1)
is_wrapper = ((RegisterAttribute) attribs [0]).IsWrapper;
}
}
#if MONOMAC
if (is_wrapper) {
does = Messaging.bool_objc_msgSend_IntPtr (this.Handle, selConformsToProtocolHandle, protocol) != 0;
} else {
does = Messaging.bool_objc_msgSendSuper_IntPtr (this.SuperHandle, selConformsToProtocolHandle, protocol) != 0;
}
#else
if (is_wrapper) {
does = Messaging.bool_objc_msgSend_IntPtr (this.Handle, Selector.GetHandle (selConformsToProtocol), protocol) != 0;
} else {
does = Messaging.bool_objc_msgSendSuper_IntPtr (this.SuperHandle, Selector.GetHandle (selConformsToProtocol), protocol) != 0;
}
#endif
if (does)
return true;
if (!Runtime.DynamicRegistrationSupported)
return false;
// the linker/trimmer will remove the following code if the dynamic registrar is removed from the app
var classHandle = ClassHandle;
lock (Runtime.protocol_cache) {
#if NET
ref var map = ref CollectionsMarshal.GetValueRefOrAddDefault (Runtime.protocol_cache, classHandle, out var exists);
if (!exists)
map = new ();
ref var result = ref CollectionsMarshal.GetValueRefOrAddDefault (map, protocol, out exists);
if (!exists)
result = DynamicConformsToProtocol (protocol);
#else
bool new_map = false;
if (!Runtime.protocol_cache.TryGetValue (classHandle, out var map)) {
map = new ();
new_map = true;
Runtime.protocol_cache.Add (classHandle, map);
}
if (new_map || !map.TryGetValue (protocol, out var result)) {
result = DynamicConformsToProtocol (protocol);
map.Add (protocol, result);
}
#endif
return result;
}
}
#if NET
// Note that this method does not work with NativeAOT, so throw an exception in that case.
// IL2075: 'this' argument does not satisfy 'DynamicallyAccessedMemberTypes.Interfaces' in call to 'System.Type.GetInterfaces()'. The return value of method 'System.Object.GetType()' does not have matching annotations. The source value must declare at least the same requirements as those declared on the target location it is assigned to.
[UnconditionalSuppressMessage ("", "IL2075", Justification = "The APIs this method tries to access are marked by other means, so this is linker-safe.")]
#endif
bool DynamicConformsToProtocol (NativeHandle protocol)
{
#if NET
// Note that this method does not work with NativeAOT, so throw an exception in that case.
if (Runtime.IsNativeAOT)
throw Runtime.CreateNativeAOTNotSupportedException ();
#endif
object [] adoptedProtocols = GetType ().GetCustomAttributes (typeof (AdoptsAttribute), true);
foreach (AdoptsAttribute adopts in adoptedProtocols) {
if (adopts.ProtocolHandle == protocol)
return true;
}
// Check if this class or any of the interfaces
// it implements are protocols.
if (IsProtocol (GetType (), protocol))
return true;
var ifaces = GetType ().GetInterfaces ();
foreach (var iface in ifaces) {
if (IsProtocol (iface, protocol))
return true;
}
return false;
}
[EditorBrowsable (EditorBrowsableState.Advanced)]
public void DangerousRelease ()
{
DangerousRelease (handle);
}
internal static void DangerousRelease (NativeHandle handle)
{
if (handle == IntPtr.Zero)
return;
#if MONOMAC
Messaging.void_objc_msgSend (handle, Selector.ReleaseHandle);
#else
Messaging.void_objc_msgSend (handle, Selector.GetHandle (Selector.Release));
#endif
}
internal static void DangerousRetain (NativeHandle handle)
{
if (handle == IntPtr.Zero)
return;
#if MONOMAC
Messaging.void_objc_msgSend (handle, Selector.RetainHandle);
#else
Messaging.void_objc_msgSend (handle, Selector.GetHandle (Selector.Retain));
#endif
}
internal static void DangerousAutorelease (NativeHandle handle)
{
#if MONOMAC
Messaging.void_objc_msgSend (handle, Selector.AutoreleaseHandle);
#else
Messaging.void_objc_msgSend (handle, Selector.GetHandle (Selector.Autorelease));
#endif
}
[EditorBrowsable (EditorBrowsableState.Advanced)]
public NSObject DangerousRetain ()
{
#if MONOMAC
Messaging.void_objc_msgSend (handle, Selector.RetainHandle);
#else
Messaging.void_objc_msgSend (handle, Selector.GetHandle (Selector.Retain));
#endif
return this;
}
[EditorBrowsable (EditorBrowsableState.Advanced)]
public NSObject DangerousAutorelease ()
{
#if MONOMAC
Messaging.void_objc_msgSend (handle, Selector.AutoreleaseHandle);
#else
Messaging.void_objc_msgSend (handle, Selector.GetHandle (Selector.Autorelease));
#endif
return this;
}
[EditorBrowsable (EditorBrowsableState.Never)]
public NativeHandle SuperHandle {
get {
if (handle == IntPtr.Zero)
ObjCRuntime.ThrowHelper.ThrowObjectDisposedException (this);
return GetSuper ();
}
}
[EditorBrowsable (EditorBrowsableState.Never)]
public NativeHandle Handle {
get { return handle; }
set {
if (handle == value)
return;
if (handle != IntPtr.Zero)
Runtime.UnregisterNSObject (handle);
handle = value;
#if NET
unsafe {
if (tracked_object_info is not null)
tracked_object_info->Handle = value;
}
#endif
if (handle != IntPtr.Zero)
Runtime.RegisterNSObject (this, handle);
}
}
[EditorBrowsable (EditorBrowsableState.Never)]
protected void InitializeHandle (NativeHandle handle)
{
InitializeHandle (handle, "init*");
}
[EditorBrowsable (EditorBrowsableState.Never)]
protected void InitializeHandle (NativeHandle handle, string initSelector)
{
if (this.handle == NativeHandle.Zero && Class.ThrowOnInitFailure) {
if (ClassHandle == NativeHandle.Zero)
throw new Exception ($"Could not create an native instance of the type '{GetType ().FullName}': the native class hasn't been loaded.\n{Constants.SetThrowOnInitFailureToFalse}.");
throw new Exception ($"Could not create an native instance of the type '{new Class (ClassHandle).Name}'.\n{Constants.SetThrowOnInitFailureToFalse}.");
}
if (handle == NativeHandle.Zero && Class.ThrowOnInitFailure) {
Handle = NativeHandle.Zero; // We'll crash if we don't do this.
throw new Exception ($"Could not initialize an instance of the type '{GetType ().FullName}': the native '{initSelector}' method returned nil.\n{Constants.SetThrowOnInitFailureToFalse}.");
}
this.Handle = handle;
}
private bool AllocIfNeeded ()
{
if (handle == NativeHandle.Zero) {
#if MONOMAC
handle = Messaging.IntPtr_objc_msgSend (Class.GetHandle (this.GetType ()), Selector.AllocHandle);
#else
handle = Messaging.IntPtr_objc_msgSend (Class.GetHandle (this.GetType ()), Selector.GetHandle (Selector.Alloc));
#endif
return true;
}
return false;
}
#if !XAMCORE_3_0
private IntPtr GetObjCIvar (string name)
{
IntPtr native;
object_getInstanceVariable (handle, name, out native);
return native;
}
[Obsolete ("Do not use; this API does not properly retain/release existing/new values, so leaks and/or crashes may occur.")]
public NSObject GetNativeField (string name)
{
IntPtr field = GetObjCIvar (name);
if (field == IntPtr.Zero)
return null;
return Runtime.GetNSObject (field);
}
private void SetObjCIvar (string name, IntPtr value)
{
object_setInstanceVariable (handle, name, value);
}
[Obsolete ("Do not use; this API does not properly retain/release existing/new values, so leaks and/or crashes may occur.")]
public void SetNativeField (string name, NSObject value)
{
if (value is null)
SetObjCIvar (name, IntPtr.Zero);
else
SetObjCIvar (name, value.Handle);
}
[DllImport (Messaging.LIBOBJC_DYLIB)]
extern static void object_getInstanceVariable (IntPtr obj, string name, out IntPtr val);
[DllImport (Messaging.LIBOBJC_DYLIB)]
extern static void object_setInstanceVariable (IntPtr obj, string name, IntPtr val);
#endif // !XAMCORE_3_0
private void InvokeOnMainThread (Selector sel, NSObject obj, bool wait)
{
#if NET
Messaging.void_objc_msgSend_NativeHandle_NativeHandle_bool (this.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone), sel.Handle, obj.GetHandle (), wait ? (byte) 1 : (byte) 0);
#else
#if MONOMAC
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (this.Handle, Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDoneHandle, sel.Handle, obj.GetHandle (), wait ? (byte) 1 : (byte) 0);
#else
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (this.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone), sel.Handle, obj.GetHandle (), wait ? (byte) 1 : (byte) 0);
#endif
#endif
}
public void BeginInvokeOnMainThread (Selector sel, NSObject obj)
{
InvokeOnMainThread (sel, obj, false);
}
public void InvokeOnMainThread (Selector sel, NSObject obj)
{
InvokeOnMainThread (sel, obj, true);
}
public void BeginInvokeOnMainThread (Action action)
{
var d = new NSAsyncActionDispatcher (action);
#if NET
Messaging.void_objc_msgSend_NativeHandle_NativeHandle_bool (d.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone),
NSDispatcher.Selector.Handle, d.Handle, 0);
#else
#if MONOMAC
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDoneHandle,
NSDispatcher.Selector.Handle, d.Handle, 0);
#else
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone),
Selector.GetHandle (NSDispatcher.SelectorName), d.Handle, 0);
#endif
#endif
}
internal void BeginInvokeOnMainThread (System.Threading.SendOrPostCallback cb, object state)
{
var d = new NSAsyncSynchronizationContextDispatcher (cb, state);
#if NET
Messaging.void_objc_msgSend_NativeHandle_NativeHandle_bool (d.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone),
Selector.GetHandle (NSDispatcher.SelectorName), d.Handle, 0);
#else
#if MONOMAC
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDoneHandle,
NSDispatcher.Selector.Handle, d.Handle, 0);
#else
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone),
Selector.GetHandle (NSDispatcher.SelectorName), d.Handle, 0);
#endif
#endif
}
public void InvokeOnMainThread (Action action)
{
using (var d = new NSActionDispatcher (action)) {
#if NET
Messaging.void_objc_msgSend_NativeHandle_NativeHandle_bool (d.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone),
Selector.GetHandle (NSDispatcher.SelectorName), d.Handle, 1);
#else
#if MONOMAC
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDoneHandle,
NSDispatcher.Selector.Handle, d.Handle, 1);
#else
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone),
Selector.GetHandle (NSDispatcher.SelectorName), d.Handle, 1);
#endif
#endif
}
}
internal void InvokeOnMainThread (System.Threading.SendOrPostCallback cb, object state)
{
using (var d = new NSSynchronizationContextDispatcher (cb, state)) {
#if NET
Messaging.void_objc_msgSend_NativeHandle_NativeHandle_bool (d.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone),
Selector.GetHandle (NSDispatcher.SelectorName), d.Handle, 1);
#else
#if MONOMAC
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDoneHandle,
NSDispatcher.Selector.Handle, d.Handle, 1);
#else
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone),
Selector.GetHandle (NSDispatcher.SelectorName), d.Handle, 1);
#endif
#endif
}
}
public static NSObject FromObject (object obj)
{
if (obj is null)
return NSNull.Null;
var t = obj.GetType ();
if (t == typeof (NSObject) || t.IsSubclassOf (typeof (NSObject)))
return (NSObject) obj;
switch (Type.GetTypeCode (t)) {
case TypeCode.Boolean:
return new NSNumber ((bool) obj);
case TypeCode.Char:
return new NSNumber ((ushort) (char) obj);
case TypeCode.SByte:
return new NSNumber ((sbyte) obj);
case TypeCode.Byte:
return new NSNumber ((byte) obj);
case TypeCode.Int16:
return new NSNumber ((short) obj);
case TypeCode.UInt16:
return new NSNumber ((ushort) obj);
case TypeCode.Int32:
return new NSNumber ((int) obj);
case TypeCode.UInt32:
return new NSNumber ((uint) obj);
case TypeCode.Int64:
return new NSNumber ((long) obj);
case TypeCode.UInt64:
return new NSNumber ((ulong) obj);
case TypeCode.Single:
return new NSNumber ((float) obj);
case TypeCode.Double:
return new NSNumber ((double) obj);
case TypeCode.String:
return new NSString ((string) obj);
default:
if (t == typeof (NativeHandle))
return NSValue.ValueFromPointer ((NativeHandle) obj);
#if !NO_SYSTEM_DRAWING
if (t == typeof (SizeF))
return NSValue.FromSizeF ((SizeF) obj);
else if (t == typeof (RectangleF))
return NSValue.FromRectangleF ((RectangleF) obj);
else if (t == typeof (PointF))
return NSValue.FromPointF ((PointF) obj);
#endif
if (t == typeof (nint))
return NSNumber.FromNInt ((nint) obj);
else if (t == typeof (nuint))
return NSNumber.FromNUInt ((nuint) obj);
else if (t == typeof (nfloat))
return NSNumber.FromNFloat ((nfloat) obj);
else if (t == typeof (CGSize))
return NSValue.FromCGSize ((CGSize) obj);
else if (t == typeof (CGRect))
return NSValue.FromCGRect ((CGRect) obj);
else if (t == typeof (CGPoint))
return NSValue.FromCGPoint ((CGPoint) obj);
#if !MONOMAC
if (t == typeof (CGAffineTransform))
return NSValue.FromCGAffineTransform ((CGAffineTransform) obj);
else if (t == typeof (UIEdgeInsets))
return NSValue.FromUIEdgeInsets ((UIEdgeInsets) obj);
#if !WATCH
else if (t == typeof (CATransform3D))
return NSValue.FromCATransform3D ((CATransform3D) obj);
#endif
#endif
// last chance for types like CGPath, CGColor... that are not NSObject but are CFObject
// see https://bugzilla.xamarin.com/show_bug.cgi?id=8458
INativeObject native = (obj as INativeObject);
if (native is not null)
return Runtime.GetNSObject (native.Handle);
return null;
}
}
public void SetValueForKeyPath (NativeHandle handle, NSString keyPath)
{
if (keyPath is null)
throw new ArgumentNullException ("keyPath");
#if NET
if (IsDirectBinding) {
ObjCRuntime.Messaging.void_objc_msgSend_NativeHandle_NativeHandle (this.Handle, Selector.GetHandle ("setValue:forKeyPath:"), handle, keyPath.Handle);
} else {
ObjCRuntime.Messaging.void_objc_msgSendSuper_NativeHandle_NativeHandle (this.SuperHandle, Selector.GetHandle ("setValue:forKeyPath:"), handle, keyPath.Handle);
}
#else
#if MONOMAC
if (IsDirectBinding) {
ObjCRuntime.Messaging.void_objc_msgSend_IntPtr_IntPtr (this.Handle, selSetValue_ForKeyPath_XHandle, handle, keyPath.Handle);
} else {
ObjCRuntime.Messaging.void_objc_msgSendSuper_IntPtr_IntPtr (this.SuperHandle, selSetValue_ForKeyPath_XHandle, handle, keyPath.Handle);
}
#else
if (IsDirectBinding) {
ObjCRuntime.Messaging.void_objc_msgSend_IntPtr_IntPtr (this.Handle, Selector.GetHandle ("setValue:forKeyPath:"), handle, keyPath.Handle);
} else {
ObjCRuntime.Messaging.void_objc_msgSendSuper_IntPtr_IntPtr (this.SuperHandle, Selector.GetHandle ("setValue:forKeyPath:"), handle, keyPath.Handle);
}
#endif
#endif
}
// if IsDirectBinding is false then we _likely_ have managed state and it's up to the subclass to provide
// a correct implementation of GetHashCode / Equals. We default to Object.GetHashCode (like classic)
public override int GetHashCode ()
{
if (!IsDirectBinding)
return base.GetHashCode ();
// Hash is nuint so 64 bits, and Int32.GetHashCode == same Int32
return GetNativeHash ().GetHashCode ();
}
public override bool Equals (object obj)
{
var o = obj as NSObject;
if (o is null)
return false;
bool isDirectBinding = IsDirectBinding;
// is only one is a direct binding then both cannot be equals
if (isDirectBinding != o.IsDirectBinding)
return false;
// we can only ask `isEqual:` to test equality if both objects are direct bindings
return isDirectBinding ? IsEqual (o) : ReferenceEquals (this, o);
}
// IEquatable<T>
public bool Equals (NSObject obj) => Equals ((object) obj);
public override string ToString ()
{
if (disposed)
return base.ToString ();
return Description ?? base.ToString ();
}
public virtual void Invoke (Action action, double delay)
{
var d = new NSAsyncActionDispatcher (action);
d.PerformSelector (NSDispatcher.Selector, null, delay);
}
public virtual void Invoke (Action action, TimeSpan delay)
{
var d = new NSAsyncActionDispatcher (action);
d.PerformSelector (NSDispatcher.Selector, null, delay.TotalSeconds);
}
internal void ClearHandle ()
{
handle = NativeHandle.Zero;
}
protected virtual void Dispose (bool disposing)
{
if (disposed)