[mediaaccessibility] Update for Xcode 11 beta 5 (#6733)

src/MediaAccessibility/MediaAccessibility.cs

@@ -262,6 +262,34 @@ namespace MediaAccessibility {
 			behavior = (MACaptionAppearanceBehavior) (int) b;
 			return (MACaptionAppearanceTextEdgeStyle) (int) rv;
 		}
+
+		[TV (13,0), Mac (10,15), iOS (13,0)]
+		[DllImport (Constants.MediaAccessibilityLibrary)]
+		static extern void MACaptionAppearanceDidDisplayCaptions (IntPtr /* CFArratRef */ strings);
+
+		[TV (13,0), Mac (10,15), iOS (13,0)]
+		public static void DidDisplayCaptions (string[] strings)
+		{
+			if ((strings == null) || (strings.Length == 0))
+				MACaptionAppearanceDidDisplayCaptions (IntPtr.Zero);
+			else {
+				using (var array = NSArray.FromStrings (strings))
+					MACaptionAppearanceDidDisplayCaptions (array.Handle);
+			}
+		}
+
+		[TV (13,0), Mac (10,15), iOS (13,0)]
+		public static void DidDisplayCaptions (NSAttributedString[] strings)
+		{
+			// CFAttributedString is “toll-free bridged” with its Foundation counterpart, NSAttributedString.
+			// https://developer.apple.com/documentation/corefoundation/cfattributedstring?language=objc
+			if ((strings == null) || (strings.Length == 0))
+				MACaptionAppearanceDidDisplayCaptions (IntPtr.Zero);
+			else {
+				using (var array = NSArray.FromNSObjects (strings))
+					MACaptionAppearanceDidDisplayCaptions (array.Handle);
+			}
+		}
 	}
 
 	static partial class MAAudibleMedia {

tests/monotouch-test/MediaAccessibility/CaptionAppearanceTest.cs

@@ -51,6 +51,27 @@ namespace MonoTouchFixtures.MediaAccessibility {
 
 			Assert.That (MACaptionAppearance.GetDisplayType (MACaptionAppearanceDomain.Default), Is.EqualTo (MACaptionAppearanceDisplayType.Automatic).Or.EqualTo (MACaptionAppearanceDisplayType.AlwaysOn).Or.EqualTo (MACaptionAppearanceDisplayType.ForcedOnly), "Default");
 		}
+
+		[Test]
+		public void DidDisplayCaptions ()
+		{
+			TestRuntime.AssertXcodeVersion (11,0);
+
+			// there's a known bug with UIPasteboard and NSAttributedString - and it makes our tests hang
+			var nsa = new NSAttributedString  [0];
+			MACaptionAppearance.DidDisplayCaptions (nsa);
+			nsa = new [] { new NSAttributedString ("Bonjour") };
+			MACaptionAppearance.DidDisplayCaptions (nsa);
+			nsa = null;
+			MACaptionAppearance.DidDisplayCaptions (nsa);
+
+			var a = new string [0];
+			MACaptionAppearance.DidDisplayCaptions (a);
+			a = new [] { "Hello", "World" };
+			MACaptionAppearance.DidDisplayCaptions (a);
+			a = null;
+			MACaptionAppearance.DidDisplayCaptions (a);
+		}
 	}
 }
 

tests/xtro-sharpie/iOS-MediaAccessibility.todo

@@ -1 +0,0 @@
-!missing-pinvoke! MACaptionAppearanceDidDisplayCaptions is not bound

tests/xtro-sharpie/macOS-MediaAccessibility.todo

@@ -1 +0,0 @@
-!missing-pinvoke! MACaptionAppearanceDidDisplayCaptions is not bound

tests/xtro-sharpie/tvOS-MediaAccessibility.todo

@@ -1 +0,0 @@
-!missing-pinvoke! MACaptionAppearanceDidDisplayCaptions is not bound