[CoreText] Update bindings to Xcode 26.4 Release Candidate

src/CoreText/CTFont.cs

@@ -2989,6 +2989,19 @@ public CTFontSymbolicTraits SymbolicTraits {
 			get { return CTFontGetSymbolicTraits (Handle); }
 		}
 
+		[DllImport (Constants.CoreTextLibrary)]
+		static extern CTFontUIFontType CTFontGetUIFontType (IntPtr font);
+
+		/// <summary>Gets the UI font type of the font.</summary>
+		/// <value>The UI font type, or <see cref="CTFontUIFontType.None" /> if the font is not a UI font.</value>
+		[SupportedOSPlatform ("ios26.4")]
+		[SupportedOSPlatform ("maccatalyst26.4")]
+		[SupportedOSPlatform ("macos26.4")]
+		[SupportedOSPlatform ("tvos26.4")]
+		public CTFontUIFontType UIFontType {
+			get { return CTFontGetUIFontType (GetCheckedHandle ()); }
+		}
+
 		[DllImport (Constants.CoreTextLibrary)]
 		static extern IntPtr CTFontCopyTraits (IntPtr font);
 		/// <summary>To be added.</summary>

src/CoreText/CTFontDescriptor.cs

@@ -329,6 +329,16 @@ public IEnumerable<string>? Languages {
 			set { Adapter.SetValue (Dictionary, CTFontDescriptorAttributeKey.Languages!, value); }
 		}
 
+		/// <summary>The language of the font descriptor.</summary>
+		[SupportedOSPlatform ("ios26.4")]
+		[SupportedOSPlatform ("maccatalyst26.4")]
+		[SupportedOSPlatform ("macos26.4")]
+		[SupportedOSPlatform ("tvos26.4")]
+		public string? Language {
+			get { return Adapter.GetStringValue (Dictionary, CTFontDescriptorAttributeKey.Language); }
+			set { Adapter.SetValue (Dictionary, CTFontDescriptorAttributeKey.Language!, value); }
+		}
+
 		// float represented as a CFNumber
 		/// <summary>The Baseline Adjustment.</summary>
 		///         <value>

src/coretext.cs

@@ -343,6 +343,10 @@ interface CTFontDescriptorAttributeKey {
 		[iOS (13, 0), NoTV, MacCatalyst (13, 1), NoMac]
 		[Field ("kCTFontRegistrationUserInfoAttribute")]
 		NSString RegistrationUserInfo { get; }
+
+		[iOS (26, 4), TV (26, 4), Mac (26, 4), MacCatalyst (26, 4)]
+		[Field ("kCTFontDescriptorLanguageAttribute")]
+		NSString Language { get; }
 	}
 
 	/// <summary>A class whose static properties can be used as keys for the <see cref="Foundation.NSDictionary" /> used by <see cref="CoreText.CTTextTabOptions" />.</summary>

tests/monotouch-test/CoreText/FontDescriptorTest.cs

@@ -94,5 +94,18 @@ public void MatchFontDescriptors ()
 			Assert.IsTrue (rv, "Return value");
 			TestRuntime.RunAsync (TimeSpan.FromSeconds (30), tcs.Task);
 		}
+
+		[Test]
+		public void LanguageAttribute ()
+		{
+			TestRuntime.AssertXcodeVersion (26, 4);
+			var fda = new CTFontDescriptorAttributes () {
+				FamilyName = "Courier",
+				Language = "en",
+			};
+			using var fd = new CTFontDescriptor (fda);
+			var attrs = fd.GetAttributes ();
+			Assert.That (attrs.Language, Is.EqualTo ("en"), "Language");
+		}
 	}
 }

tests/monotouch-test/CoreText/FontTest.cs

@@ -198,5 +198,21 @@ public void GetVariationAxes ()
 				Assert.That (axes.Length, Is.EqualTo (0), "Length");
 			}
 		}
+
+		[Test]
+		public void UIFontType_SystemFont ()
+		{
+			TestRuntime.AssertXcodeVersion (26, 4);
+			using var font = new CTFont (CTFontUIFontType.System, 12, "en");
+			Assert.That (font.UIFontType, Is.EqualTo (CTFontUIFontType.System), "System");
+		}
+
+		[Test]
+		public void UIFontType_RegularFont ()
+		{
+			TestRuntime.AssertXcodeVersion (26, 4);
+			using var font = new CTFont ("HoeflerText-Regular", 10);
+			Assert.That (font.UIFontType, Is.EqualTo (CTFontUIFontType.None), "None");
+		}
 	}
 }