Relocate CompositionRegion

src/Android/Avalonia.Android/AndroidInputMethod.cs

@@ -162,4 +162,19 @@ namespace Avalonia.Android
             });
         }
     }
+
+    public readonly struct ComposingRegion
+    {
+        private readonly int _start = -1;
+        private readonly int _end = -1;
+
+        public ComposingRegion(int start, int end)
+        {
+            _start = start;
+            _end = end;
+        }
+
+        public int Start => _start;
+        public int End => _end;
+    }
 }

src/Android/Avalonia.Android/Platform/SkiaPlatform/TopLevelImpl.cs

@@ -287,8 +287,6 @@ namespace Avalonia.Android.Platform.SkiaPlatform
 
             ComposingRegion = new ComposingRegion(start, end);
 
-            _inputMethod.Client?.SetComposingRegion(ComposingRegion);
-
             return base.SetComposingRegion(start, end);
         }
 

src/Avalonia.Base/Input/TextInput/ITextInputMethodClient.cs

@@ -30,7 +30,6 @@ namespace Avalonia.Input.TextInput
         /// </summary>
         void SetPreeditText(string? text);
 
-        void SetComposingRegion(ComposingRegion? region);
         /// <summary>
         /// Indicates if text input client is capable of providing the text around the cursor
         /// </summary>
@@ -53,26 +52,4 @@ namespace Avalonia.Input.TextInput
         public int CursorOffset { get; set; }
         public int AnchorOffset { get; set; }
     }
-
-    public readonly struct ComposingRegion
-    {
-        private readonly int _start = -1;
-        private readonly int _end = -1;
-
-        public ComposingRegion(int start, int end)
-        {
-            _start = start;
-            _end = end;
-        }
-
-        public int Start => _start;
-        public int End => _end;
-
-        public bool Intersects(ComposingRegion region)
-        {
-            return _start <= region.Start && _end >= region.Start ||
-                _end >= region.End && _start <= region.End ||
-                _start >= region.Start && _end <= region.End;
-        }
-    }
 }

src/Avalonia.Controls/TextBoxTextInputMethodClient.cs

@@ -187,15 +187,5 @@ namespace Avalonia.Controls
 
             }, DispatcherPriority.Input);
         }
-
-        public void SetComposingRegion(ComposingRegion? region)
-        {
-            if(_presenter == null)
-            {
-                return;
-            }
-
-            _presenter.ComposingRegion = region;
-        }
     }
 }