private UIView AddDummyViewToContainerView(UIView containerView, INativeObject topItem, INativeObject bottomItem, List<NSLayoutConstraint> constraints)
{
UIView dummyView = new UIView {
TranslatesAutoresizingMaskIntoConstraints = false
};
containerView.AddSubview (dummyView);
// The horizontal layout of the dummy view does not matter, but for completeness, we give it a width of 0 and center it horizontally.
constraints.AddRange (new NSLayoutConstraint[] {
NSLayoutConstraint.Create(dummyView, NSLayoutAttribute.Width, NSLayoutRelation.Equal, null, NSLayoutAttribute.NoAttribute, 0f, 0f),
NSLayoutConstraint.Create(dummyView, NSLayoutAttribute.CenterX, NSLayoutRelation.Equal, containerView, NSLayoutAttribute.CenterX, 1f, 0f),
NSLayoutConstraint.Create(dummyView, NSLayoutAttribute.Top, NSLayoutRelation.Equal, topItem, NSLayoutAttribute.Bottom, 1f, 0f),
NSLayoutConstraint.Create(dummyView, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, bottomItem, NSLayoutAttribute.Top, 1f, 0f)
});
return dummyView;
}
public static CFDictionary FromObjectsAndKeys (INativeObject[] objects, INativeObject[] keys)
{
if (objects == null)
throw new ArgumentNullException ("objects");
if (keys == null)
throw new ArgumentNullException ("keys");
if (objects.Length != keys.Length)
throw new ArgumentException ("The length of both arrays must be the same");
IntPtr [] k = new IntPtr [keys.Length];
IntPtr [] v = new IntPtr [keys.Length];
for (int i = 0; i < k.Length; i++) {
k [i] = keys [i].Handle;
v [i] = objects [i].Handle;
}
return new CFDictionary (CFDictionaryCreate (IntPtr.Zero, k, v, k.Length, KeyCallbacks, ValueCallbacks), true);
}
public static AnimationElement Layer (CALayer viewLayer, string keyPath, INativeObject from, INativeObject to)
{
return new AnimationElement {
View = viewLayer,
KeyPath = keyPath,
FromValue = from,
ToValue = to
};
}
public static AnimationElement Layer (CALayer viewLayer, string keyPath, INativeObject to)
{
return Layer (viewLayer, keyPath, null, to);
}
public static NSObject FromObject(object obj)
{
if (obj == 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(IntPtr))
{
return(NSValue.ValueFromPointer((IntPtr)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 XAMCORE_2_0
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));
}
#endif
#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 != null)
{
return(Runtime.GetNSObject(native.Handle));
}
return(null);
}
}
protected abstract bool DoSetProperty(NSString name, INativeObject value);
protected override bool DoSetProperty (NSString name, INativeObject value)
{
return CFReadStreamSetProperty (Handle, name.Handle, value.Handle);
}
public void SetCFProperties (INativeObject properties)
{
ThrowIfDisposed ();
var result = IORegistryEntrySetCFProperties (Handle, properties.Handle);
ThrowIfError (result);
}
public void PostNotification(string notification, INativeObject objectToObserve, NSDictionary userInfo = null, bool deliverImmediately = false, bool postOnAllSessions = false)
{
var strHandle = NSString.CreateNative (notification);
CFNotificationCenterPostNotificationWithOptions (
center: handle,
name: strHandle,
obj: objectToObserve == null ? IntPtr.Zero : objectToObserve.Handle,
userInfo: userInfo == null ? IntPtr.Zero : userInfo.Handle,
options: (deliverImmediately ? 1 : 0) | (postOnAllSessions ? 2 : 0));
NSString.ReleaseNative (strHandle);
}
public CFNotificationObserverToken AddObserver(string name, INativeObject objectToObserve, Action<string,NSDictionary> notificationHandler,
CFNotificationSuspensionBehavior suspensionBehavior = CFNotificationSuspensionBehavior.DeliverImmediately)
{
if (darwinnc != null && darwinnc.Handle == Handle){
if (name == null)
throw new ArgumentNullException ("name", "When using the Darwin Notification Center, the value passed must not be null");
}
var strHandle = name == null ? IntPtr.Zero : NSString.CreateNative (name);
var token = new CFNotificationObserverToken () {
stringName = name,
centerHandle = handle,
nameHandle = strHandle,
observedObject = objectToObserve == null ? IntPtr.Zero : objectToObserve.Handle,
listener = notificationHandler
};
//
// To allow callbacks to add observers, we duplicate the list of listeners on AddObserver
// We do the duplication on AddObserver, instead of making a copy on the notification
// callback, as we expect the notification callback to be a more common operation
// than the AddObserver operation
//
List<CFNotificationObserverToken> listenersForName;
lock (listeners){
if (!listeners.TryGetValue (name, out listenersForName)){
listenersForName = new List<CFNotificationObserverToken> (1);
CFNotificationCenterAddObserver (center: handle,
observer: handle,
callback: NotificationCallback,
name: strHandle,
obj: token.observedObject,
suspensionBehavior: (IntPtr) suspensionBehavior);
} else
listenersForName = new List<CFNotificationObserverToken> (listenersForName);
listenersForName.Add (token);
listeners [name] = listenersForName;
}
return token;
}
protected override bool DoSetProperty(NSString name, INativeObject value)
{
if (name == null)
throw new ArgumentNullException ("name");
return CFReadStreamSetProperty (Handle, name.Handle, value == null ? IntPtr.Zero : value.Handle);
}
public AttachableNativeObject(INativeObject obj)
{
nativeObj = obj;
}
public static CFDictionary FromObjectAndKey(INativeObject obj, INativeObject key)
{
return(new CFDictionary(CFDictionaryCreate(IntPtr.Zero, new IntPtr[] { key.Handle }, new IntPtr [] { obj.Handle }, 1, KeyCallbacks, ValueCallbacks), true));
}
public AttachableNativeObject(INativeObject obj)
{
nativeObj = obj;
}
internal static void SetNSAccessibilityElement(Atk.Object o, INativeObject native)
{
GtkWorkarounds.SetData(o, XamarinPrivateAtkCocoaNSAccessibilityKey, native.Handle);
}
protected void TryListenController(INativeObject item)
{
var viewControllerView = item.FindParent<IViewControllerView>();
if (viewControllerView != null)
{
InitializeListener();
viewControllerView.Mediator.DisposeHandler += _listener.Handle;
}
}
protected ManagedObject(INativeObject nativeObject)
{
_nativeObject = nativeObject;
}
public void SetCFProperty (string name, INativeObject value)
{
ThrowIfDisposed ();
var nameCFString = new CFString (name);
var result = IOConnectSetCFProperty (Handle, nameCFString.Handle, value.Handle);
ThrowIfError (result);
}
public void SetCFProperty (string propertyName, INativeObject properties)
{
ThrowIfDisposed ();
var propertyNameAsCFString = new CFString (propertyName);
var result = IORegistryEntrySetCFProperty (Handle, propertyNameAsCFString.Handle, properties.Handle);
ThrowIfError (result);
}
public static AnimationElement TextColor (UILabel view, INativeObject to)
{
return TextColor (view, null, to);
}
public static CFDictionary FromObjectAndKey (INativeObject obj, INativeObject key)
{
return new CFDictionary (CFDictionaryCreate (IntPtr.Zero, new IntPtr[] { key.Handle }, new IntPtr [] { obj.Handle }, 1, KeyCallbacks, ValueCallbacks), true);
}
public static AnimationElement TintColor (UIButton view, INativeObject to)
{
return TintColor (view, null, to);
}
internal void SetProperty(NSString name, INativeObject value)
{
CheckHandle ();
if (DoSetProperty (name, value))
return;
throw new InvalidOperationException (string.Format (
"Cannot set property '{0}' on {1}.", name, GetType ().Name)
);
}
public static AnimationElement TintColor (UIButton view, INativeObject from, INativeObject to)
{
return new AnimationElement {
View = view,
KeyPath = "tintColor",
FromValue = from,
ToValue = to
};
}
//
// It really should be ICFType, and we should pepper various classes with ICFType
//
public void Enqueue (INativeObject cftypeBuffer)
{
if (cftypeBuffer == null)
throw new ArgumentNullException ("cftypeBuffer");
lock (queueObjects){
var cfh = cftypeBuffer.Handle;
CMBufferQueueEnqueue (handle, cfh);
if (!queueObjects.ContainsKey (cfh))
queueObjects [cfh] = cftypeBuffer;
}
}
public static void DisposeEx(this INativeObject nativeObject)
{
NativeObjectManager?.Dispose(nativeObject, null);
}