🚑 修复可能导致输入法特定场景卡顿的问题

Util/ScrollUtil.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media;
+
+namespace GeekDesk.Util
+{
+    public class ScrollUtil
+    {
+
+        public static bool IsBootomScrollView(ScrollViewer view)
+        {
+            try
+            {
+                bool isBottom = false;
+                double dVer = view.VerticalOffset;
+                double vViewport = view.ViewportHeight;
+                double eextent = view.ExtentHeight;
+                if (dVer + vViewport >= eextent)
+                {
+                    isBottom = true;
+                }
+                else
+                {
+                    isBottom = false;
+                }
+                return isBottom;
+            } catch (Exception e)
+            {
+                return false;
+            }
+            
+        }
+
+        public static bool IsTopScrollView(ScrollViewer view)
+        {
+            try
+            {
+                return (int)view.VerticalOffset == 0;
+            }
+            catch (Exception e)
+            {
+                return false;
+            }
+        }
+
+        public static T FindSimpleVisualChild<T>(DependencyObject element) where T : class
+        {
+            try
+            {
+                while (element != null)
+                {
+
+                    if (element is T)
+                        return element as T;
+                    if (VisualTreeHelper.GetChildrenCount(element) > 0)
+                    {
+                        element = VisualTreeHelper.GetChild(element, 0);
+                    }
+                }
+                return null;
+            }
+            catch (Exception e)
+            {
+                return null;
+            }
+
+        }
+
+    }
+}