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NSObject2.cs
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NSObject2.cs
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// 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.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;
#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
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); }
}
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);
}
#if NET
protected internal NSObject (NativeHandle handle)
#else
public NSObject (NativeHandle handle)
#endif
: this (handle, false)
{
}
#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);
}
internal static IntPtr CreateNSObject (IntPtr type_gchandle, IntPtr handle, Flags flags)
{
#if NET
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, [MarshalAs (UnmanagedType.I1)] bool user_type);
static void RegisterToggleReference (NSObject obj, IntPtr handle, bool isCustomType)
{
#if NET && __MACOS__
Runtime.RegisterToggleReferenceCoreCLR (obj, handle, isCustomType);
#else
RegisterToggleRef (obj, handle, isCustomType);
#endif
}
#if !XAMCORE_3_0
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.
*/
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")]
[return: MarshalAs (UnmanagedType.I1)]
static extern bool 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)) {
// 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);
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);
} else {
does = Messaging.bool_objc_msgSendSuper_IntPtr (this.SuperHandle, selConformsToProtocolHandle, protocol);
}
#else
if (is_wrapper) {
does = Messaging.bool_objc_msgSend_IntPtr (this.Handle, Selector.GetHandle (selConformsToProtocol), protocol);
} else {
does = Messaging.bool_objc_msgSendSuper_IntPtr (this.SuperHandle, Selector.GetHandle (selConformsToProtocol), protocol);
}
#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;
}
}
bool DynamicConformsToProtocol (NativeHandle protocol)
{
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;
}
public NativeHandle SuperHandle {
get {
if (handle == IntPtr.Zero)
ObjCRuntime.ThrowHelper.ThrowObjectDisposedException (this);
return GetSuper ();
}
}
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);
#else
#if MONOMAC
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (this.Handle, Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDoneHandle, sel.Handle, obj.GetHandle (), wait);
#else
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (this.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone), sel.Handle, obj.GetHandle (), wait);
#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, false);
#else
#if MONOMAC
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDoneHandle,
NSDispatcher.Selector.Handle, d.Handle, false);
#else
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone),
Selector.GetHandle (NSDispatcher.SelectorName), d.Handle, false);
#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, false);
#else
#if MONOMAC
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDoneHandle,
NSDispatcher.Selector.Handle, d.Handle, false);
#else
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone),
Selector.GetHandle (NSDispatcher.SelectorName), d.Handle, false);
#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, true);
#else
#if MONOMAC
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDoneHandle,
NSDispatcher.Selector.Handle, d.Handle, true);
#else
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone),
Selector.GetHandle (NSDispatcher.SelectorName), d.Handle, true);
#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, true);
#else
#if MONOMAC
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDoneHandle,
NSDispatcher.Selector.Handle, d.Handle, true);
#else
Messaging.void_objc_msgSend_IntPtr_IntPtr_bool (d.Handle, Selector.GetHandle (Selector.PerformSelectorOnMainThreadWithObjectWaitUntilDone),
Selector.GetHandle (NSDispatcher.SelectorName), d.Handle, true);
#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)
return;
disposed = true;
if (handle != NativeHandle.Zero) {
if (disposing) {
ReleaseManagedRef ();
} else {
NSObject_Disposer.Add (this);
}
} else {
FreeData ();
}
}
unsafe void FreeData ()
{
if (super != NativeHandle.Zero) {
Marshal.FreeHGlobal (super);
super = NativeHandle.Zero;
}
}
[Register ("__NSObject_Disposer")]
[Preserve (AllMembers = true)]
internal class NSObject_Disposer : NSObject {
static readonly List<NSObject> drainList1 = new List<NSObject> ();
static readonly List<NSObject> drainList2 = new List<NSObject> ();
static List<NSObject> handles = drainList1;
static readonly IntPtr class_ptr = Class.GetHandle ("__NSObject_Disposer");
#if MONOMAC
static readonly IntPtr drainHandle = Selector.GetHandle ("drain:");
#endif
static readonly object lock_obj = new object ();
private NSObject_Disposer ()