[Opt] 优化虚拟列表 优化手柄导航功能

Editor/RecyclerView/RecyclerViewEditor.cs

@@ -66,22 +66,12 @@ namespace AlicizaX.UI.Editor
 
         private void OnEnable()
         {
-            // 先绑定所有 SerializedProperty
             InitializeLayoutManagerProperties();
             InitializeScrollerProperties();
             InitializeBaseProperties();
             InitializeTemplateProperties();
 
-            // 确保序列化对象是最新的
             serializedObject.Update();
-
-            // 如果 layoutManager 的 managedReferenceValue 丢失但有记录的 typeName，则尝试恢复实例
-            RestoreLayoutManagerFromTypeNameIfMissing();
-
-            // 如果 scroller 组件丢失但有记录的 typeName，则尝试恢复组件到目标 GameObject 上
-            RestoreScrollerFromTypeNameIfMissing();
-
-            // 应用修改（若有）
             serializedObject.ApplyModifiedProperties();
         }
 
@@ -134,6 +124,7 @@ namespace AlicizaX.UI.Editor
             serializedObject.Update();
             bool isPlaying = Application.isPlaying;
 
+            DrawMissingReferenceRepairSection(isPlaying);
             DrawLayoutManagerSection(isPlaying);
             DrawBaseSettingsSection(isPlaying);
             DrawScrollerSection(isPlaying);
@@ -144,6 +135,71 @@ namespace AlicizaX.UI.Editor
 
         #endregion
 
+
+        private void DrawMissingReferenceRepairSection(bool isPlaying)
+        {
+            if (isPlaying)
+            {
+                return;
+            }
+
+            bool missingLayout = _layoutManager != null &&
+                                 _layoutManager.managedReferenceValue == null &&
+                                 _layoutManagerTypeName != null &&
+                                 !string.IsNullOrEmpty(_layoutManagerTypeName.stringValue);
+            bool missingScroller = _scroller != null &&
+                                   _scroller.objectReferenceValue == null &&
+                                   _scrollerTypeName != null &&
+                                   !string.IsNullOrEmpty(_scrollerTypeName.stringValue);
+            RecyclerView recyclerView = target as RecyclerView;
+            bool missingScrollbarEx = recyclerView != null &&
+                                      recyclerView.Scrollbar != null &&
+                                      recyclerView.Scrollbar.GetComponent<ScrollbarEx>() == null;
+#if UX_NAVIGATION
+            bool missingNavigationBridge = recyclerView != null &&
+                                           recyclerView.GetComponent<RecyclerNavigationBridge>() == null;
+#else
+            bool missingNavigationBridge = false;
+#endif
+            bool templatesNeedRecyclerSelectable = TemplatesNeedRecyclerItemSelectable();
+            if (!missingLayout && !missingScroller && !missingScrollbarEx && !missingNavigationBridge && !templatesNeedRecyclerSelectable)
+            {
+                return;
+            }
+
+            EditorGUILayout.BeginVertical("box");
+            EditorGUILayout.LabelField("Missing References", EditorStyles.boldLabel);
+            if (missingLayout && GUILayout.Button("Restore Layout Manager"))
+            {
+                RestoreLayoutManagerFromTypeNameIfMissing();
+                serializedObject.ApplyModifiedProperties();
+            }
+
+            if (missingScroller && GUILayout.Button("Restore Scroller Component"))
+            {
+                RestoreScrollerFromTypeNameIfMissing();
+                serializedObject.ApplyModifiedProperties();
+            }
+
+            if (missingScrollbarEx && GUILayout.Button("Add ScrollbarEx"))
+            {
+                Undo.AddComponent<ScrollbarEx>(recyclerView.Scrollbar.gameObject);
+                EditorUtility.SetDirty(recyclerView.Scrollbar);
+            }
+
+            if (missingNavigationBridge && GUILayout.Button("Add RecyclerNavigationBridge"))
+            {
+                Undo.AddComponent<RecyclerNavigationBridge>(recyclerView.gameObject);
+                EditorUtility.SetDirty(recyclerView);
+            }
+
+            if (templatesNeedRecyclerSelectable && GUILayout.Button("Add RecyclerItemSelectable To Templates"))
+            {
+                AddComponentToTemplates<RecyclerItemSelectable>();
+            }
+            EditorGUILayout.EndVertical();
+        }
+
         #region Layout Manager Section
 
         private void DrawLayoutManagerSection(bool isPlaying)
@@ -697,6 +753,106 @@ namespace AlicizaX.UI.Editor
             return false;
         }
 
+        private bool TemplatesNeedComponent<TComponent>() where TComponent : Component
+        {
+            if (_templates == null || !_templates.isArray)
+            {
+                return false;
+            }
+
+            for (int i = 0; i < _templates.arraySize; i++)
+            {
+                SerializedProperty item = _templates.GetArrayElementAtIndex(i);
+                GameObject template = GetTemplateGameObject(item.objectReferenceValue);
+                if (template != null && template.GetComponent<TComponent>() == null)
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        private bool TemplatesNeedRecyclerItemSelectable()
+        {
+#if UX_NAVIGATION
+            if (_templates == null || !_templates.isArray)
+            {
+                return false;
+            }
+
+            for (int i = 0; i < _templates.arraySize; i++)
+            {
+                SerializedProperty item = _templates.GetArrayElementAtIndex(i);
+                GameObject template = GetTemplateGameObject(item.objectReferenceValue);
+                if (template == null)
+                {
+                    continue;
+                }
+
+                ViewHolder holder = template.GetComponent<ViewHolder>();
+                if (holder != null && RequiresSelection(holder.ItemInteractionFlags) && template.GetComponent<RecyclerItemSelectable>() == null)
+                {
+                    return true;
+                }
+            }
+
+            return false;
+#else
+            return false;
+#endif
+        }
+
+        private static bool RequiresSelection(ItemInteractionFlags interactionFlags)
+        {
+            const ItemInteractionFlags selectionFlags =
+                ItemInteractionFlags.Select |
+                ItemInteractionFlags.Deselect |
+                ItemInteractionFlags.Move |
+                ItemInteractionFlags.Submit |
+                ItemInteractionFlags.Cancel;
+
+            return (interactionFlags & selectionFlags) != 0;
+        }
+
+        private void AddComponentToTemplates<TComponent>() where TComponent : Component
+        {
+            if (_templates == null || !_templates.isArray)
+            {
+                return;
+            }
+
+            for (int i = 0; i < _templates.arraySize; i++)
+            {
+                SerializedProperty item = _templates.GetArrayElementAtIndex(i);
+                GameObject template = GetTemplateGameObject(item.objectReferenceValue);
+                if (template == null || template.GetComponent<TComponent>() != null)
+                {
+                    continue;
+                }
+
+                Undo.AddComponent<TComponent>(template);
+                EditorUtility.SetDirty(template);
+            }
+
+            serializedObject.ApplyModifiedProperties();
+        }
+
+        private static GameObject GetTemplateGameObject(Object templateReference)
+        {
+            if (templateReference is GameObject gameObject)
+            {
+                return gameObject;
+            }
+
+            if (templateReference is Component component)
+            {
+                return component.gameObject;
+            }
+
+            return null;
+        }
+
         #endregion
 
         #region Helper Methods

Editor/UX/Navigation/UXNavigationScopeEditor.cs

@@ -1,4 +1,4 @@
-#if INPUTSYSTEM_SUPPORT && UX_NAVIGATION
+#if INPUTSYSTEM_SUPPORT && UX_NAVIGATION
 using System.Collections.Generic;
 using UnityEditor;
 using UnityEngine;
@@ -9,6 +9,7 @@ namespace AlicizaX.UI.Extension.Editor
     [CustomEditor(typeof(UXNavigationScope))]
     public sealed class UXNavigationScopeEditor : UnityEditor.Editor
     {
+        private readonly List<Selectable> _selectableBuffer = new List<Selectable>(64);
         private SerializedProperty _defaultSelectable;
         private SerializedProperty _bakedSelectables;
         private SerializedProperty _runtimeSelectableCapacity;
@@ -55,7 +56,7 @@ namespace AlicizaX.UI.Extension.Editor
         {
             using (new EditorGUILayout.HorizontalScope())
             {
-                if (GUILayout.Button("收集子 Selectable"))
+                if (GUILayout.Button("收集本 Scope Selectable"))
                 {
                     BakeSelectables();
                 }
@@ -70,6 +71,19 @@ namespace AlicizaX.UI.Extension.Editor
                     SortBakedSelectables();
                 }
             }
+
+            using (new EditorGUILayout.HorizontalScope())
+            {
+                if (GUILayout.Button("烘焙当前 Prefab 所有 Scope"))
+                {
+                    BakeAllScopesInRoot();
+                }
+
+                if (GUILayout.Button("校验当前 Prefab 所有 Scope"))
+                {
+                    ValidateAllScopesInRoot();
+                }
+            }
         }
 
         private void DrawDiagnostics()
@@ -105,32 +119,22 @@ namespace AlicizaX.UI.Extension.Editor
                     EditorGUILayout.HelpBox("烘焙列表存在跨 Scope 引用。", MessageType.Error);
                     return;
                 }
+
+                for (int j = i + 1; j < _bakedSelectables.arraySize; j++)
+                {
+                    if (_bakedSelectables.GetArrayElementAtIndex(j).objectReferenceValue == selectable)
+                    {
+                        EditorGUILayout.HelpBox("烘焙列表存在重复引用。", MessageType.Error);
+                        return;
+                    }
+                }
             }
         }
 
         private void BakeSelectables()
         {
             UXNavigationScope scope = (UXNavigationScope)target;
-            Selectable[] allSelectables = scope.GetComponentsInChildren<Selectable>(true);
-            List<Selectable> ownedSelectables = new List<Selectable>(allSelectables.Length);
-            for (int i = 0; i < allSelectables.Length; i++)
-            {
-                Selectable selectable = allSelectables[i];
-                if (selectable != null && selectable.GetComponentInParent<UXNavigationScope>(true) == scope)
-                {
-                    ownedSelectables.Add(selectable);
-                }
-            }
-
-            Undo.RecordObject(scope, "Bake UX Navigation Selectables");
-            _bakedSelectables.arraySize = ownedSelectables.Count;
-            for (int i = 0; i < ownedSelectables.Count; i++)
-            {
-                _bakedSelectables.GetArrayElementAtIndex(i).objectReferenceValue = ownedSelectables[i];
-            }
-
-            serializedObject.ApplyModifiedProperties();
-            EditorUtility.SetDirty(scope);
+            BakeScope(scope, serializedObject, _bakedSelectables, _selectableBuffer);
         }
 
         private void RemoveNullEntries()
@@ -152,10 +156,85 @@ namespace AlicizaX.UI.Extension.Editor
         private void SortBakedSelectables()
         {
             UXNavigationScope scope = (UXNavigationScope)target;
-            List<Selectable> selectables = new List<Selectable>(_bakedSelectables.arraySize);
-            for (int i = 0; i < _bakedSelectables.arraySize; i++)
+            SortScope(scope, serializedObject, _bakedSelectables);
+        }
+
+        private void BakeAllScopesInRoot()
+        {
+            GameObject root = GetRootGameObject(((UXNavigationScope)target).gameObject);
+            UXNavigationScope[] scopes = root.GetComponentsInChildren<UXNavigationScope>(true);
+            for (int i = 0; i < scopes.Length; i++)
             {
-                Selectable selectable = _bakedSelectables.GetArrayElementAtIndex(i).objectReferenceValue as Selectable;
+                UXNavigationScope scope = scopes[i];
+                SerializedObject scopeObject = new SerializedObject(scope);
+                SerializedProperty bakedSelectables = scopeObject.FindProperty("_bakedSelectables");
+                BakeScope(scope, scopeObject, bakedSelectables);
+            }
+        }
+
+        private void ValidateAllScopesInRoot()
+        {
+            GameObject root = GetRootGameObject(((UXNavigationScope)target).gameObject);
+            UXNavigationScope[] scopes = root.GetComponentsInChildren<UXNavigationScope>(true);
+            int errorCount = 0;
+            for (int i = 0; i < scopes.Length; i++)
+            {
+                if (!ValidateScope(scopes[i]))
+                {
+                    errorCount++;
+                }
+            }
+
+            if (errorCount == 0)
+            {
+                Debug.Log("UXNavigationScope validation passed.", root);
+            }
+            else
+            {
+                Debug.LogErrorFormat(root, "UXNavigationScope validation failed. Error count: {0}", errorCount);
+            }
+        }
+
+        private static readonly List<Selectable> StaticSelectableBuffer = new List<Selectable>(64);
+
+        private static void BakeScope(UXNavigationScope scope, SerializedObject scopeObject, SerializedProperty bakedSelectables)
+        {
+            BakeScope(scope, scopeObject, bakedSelectables, StaticSelectableBuffer);
+        }
+
+        private static void BakeScope(UXNavigationScope scope, SerializedObject scopeObject, SerializedProperty bakedSelectables, List<Selectable> scopeEditorBuffer)
+        {
+            Selectable[] allSelectables = scope.GetComponentsInChildren<Selectable>(true);
+            List<Selectable> ownedSelectables = scopeEditorBuffer;
+            ownedSelectables.Clear();
+            for (int i = 0; i < allSelectables.Length; i++)
+            {
+                Selectable selectable = allSelectables[i];
+                if (selectable != null && selectable.GetComponentInParent<UXNavigationScope>(true) == scope)
+                {
+                    ownedSelectables.Add(selectable);
+                }
+            }
+
+            ownedSelectables.Sort(CompareSiblingPath);
+            Undo.RecordObject(scope, "Bake UX Navigation Selectables");
+            bakedSelectables.arraySize = ownedSelectables.Count;
+            for (int i = 0; i < ownedSelectables.Count; i++)
+            {
+                bakedSelectables.GetArrayElementAtIndex(i).objectReferenceValue = ownedSelectables[i];
+            }
+
+            scopeObject.ApplyModifiedProperties();
+            EditorUtility.SetDirty(scope);
+        }
+
+        private static void SortScope(UXNavigationScope scope, SerializedObject scopeObject, SerializedProperty bakedSelectables)
+        {
+            List<Selectable> selectables = StaticSelectableBuffer;
+            selectables.Clear();
+            for (int i = 0; i < bakedSelectables.arraySize; i++)
+            {
+                Selectable selectable = bakedSelectables.GetArrayElementAtIndex(i).objectReferenceValue as Selectable;
                 if (selectable != null)
                 {
                     selectables.Add(selectable);
@@ -164,16 +243,70 @@ namespace AlicizaX.UI.Extension.Editor
 
             selectables.Sort(CompareSiblingPath);
             Undo.RecordObject(scope, "Sort UX Navigation Selectables");
-            _bakedSelectables.arraySize = selectables.Count;
+            bakedSelectables.arraySize = selectables.Count;
             for (int i = 0; i < selectables.Count; i++)
             {
-                _bakedSelectables.GetArrayElementAtIndex(i).objectReferenceValue = selectables[i];
+                bakedSelectables.GetArrayElementAtIndex(i).objectReferenceValue = selectables[i];
             }
 
-            serializedObject.ApplyModifiedProperties();
+            scopeObject.ApplyModifiedProperties();
             EditorUtility.SetDirty(scope);
         }
 
+        private static bool ValidateScope(UXNavigationScope scope)
+        {
+            SerializedObject scopeObject = new SerializedObject(scope);
+            SerializedProperty defaultSelectableProperty = scopeObject.FindProperty("_defaultSelectable");
+            SerializedProperty bakedSelectables = scopeObject.FindProperty("_bakedSelectables");
+            Selectable defaultSelectable = defaultSelectableProperty.objectReferenceValue as Selectable;
+            bool valid = true;
+
+            if (defaultSelectable != null && defaultSelectable.GetComponentInParent<UXNavigationScope>(true) != scope)
+            {
+                Debug.LogError("UXNavigationScope default selectable crosses scope.", scope);
+                valid = false;
+            }
+
+            for (int i = 0; i < bakedSelectables.arraySize; i++)
+            {
+                Selectable selectable = bakedSelectables.GetArrayElementAtIndex(i).objectReferenceValue as Selectable;
+                if (selectable == null)
+                {
+                    Debug.LogWarning("UXNavigationScope baked selectables contain null entry.", scope);
+                    valid = false;
+                    continue;
+                }
+
+                if (selectable.GetComponentInParent<UXNavigationScope>(true) != scope)
+                {
+                    Debug.LogError("UXNavigationScope baked selectable crosses scope.", selectable);
+                    valid = false;
+                }
+
+                for (int j = i + 1; j < bakedSelectables.arraySize; j++)
+                {
+                    if (bakedSelectables.GetArrayElementAtIndex(j).objectReferenceValue == selectable)
+                    {
+                        Debug.LogError("UXNavigationScope baked selectables contain duplicate entry.", selectable);
+                        valid = false;
+                    }
+                }
+            }
+
+            return valid;
+        }
+
+        private static GameObject GetRootGameObject(GameObject gameObject)
+        {
+            Transform current = gameObject.transform;
+            while (current.parent != null)
+            {
+                current = current.parent;
+            }
+
+            return current.gameObject;
+        }
+
         private static int CompareSiblingPath(Selectable left, Selectable right)
         {
             if (left == right)
@@ -181,22 +314,67 @@ namespace AlicizaX.UI.Extension.Editor
                 return 0;
             }
 
-            string leftPath = GetSiblingPath(left.transform);
-            string rightPath = GetSiblingPath(right.transform);
-            return string.CompareOrdinal(leftPath, rightPath);
+            Transform leftTransform = left != null ? left.transform : null;
+            Transform rightTransform = right != null ? right.transform : null;
+            return CompareSiblingPath(leftTransform, rightTransform);
         }
 
-        private static string GetSiblingPath(Transform transform)
+        private static int CompareSiblingPath(Transform left, Transform right)
         {
-            if (transform == null)
+            if (left == right)
             {
-                return string.Empty;
+                return 0;
             }
 
-            return transform.parent == null
-                ? transform.GetSiblingIndex().ToString("D4")
-                : GetSiblingPath(transform.parent) + "/" + transform.GetSiblingIndex().ToString("D4");
+            if (left == null)
+            {
+                return -1;
+            }
+
+            if (right == null)
+            {
+                return 1;
+            }
+
+            int leftDepth = GetDepth(left);
+            int rightDepth = GetDepth(right);
+            Transform leftCursor = left;
+            Transform rightCursor = right;
+
+            while (leftDepth > rightDepth)
+            {
+                leftCursor = leftCursor.parent;
+                leftDepth--;
+            }
+
+            while (rightDepth > leftDepth)
+            {
+                rightCursor = rightCursor.parent;
+                rightDepth--;
+            }
+
+            while (leftCursor.parent != rightCursor.parent)
+            {
+                leftCursor = leftCursor.parent;
+                rightCursor = rightCursor.parent;
+            }
+
+            return leftCursor.GetSiblingIndex().CompareTo(rightCursor.GetSiblingIndex());
+        }
+
+        private static int GetDepth(Transform transform)
+        {
+            int depth = 0;
+            Transform current = transform;
+            while (current != null)
+            {
+                depth++;
+                current = current.parent;
+            }
+
+            return depth;
         }
     }
 }
 #endif
+

Runtime/RecyclerView/Adapter/Adapter.cs

@@ -8,27 +8,18 @@ namespace AlicizaX.UI
         void ReleaseAllItemRenders();
     }
 
-    public class Adapter<T> : IAdapter, IItemRenderCacheOwner where T : ISimpleViewData
+    internal interface IItemRenderPrewarmer
     {
-        private sealed class ItemRenderEntry
-        {
-            public ItemRenderEntry(string viewName, IItemRender itemRender)
-            {
-                ViewName = viewName;
-                ItemRender = itemRender;
-            }
-
-            public string ViewName { get; }
-
-            public IItemRender ItemRender { get; }
-        }
+        void PrewarmItemRender(ViewHolder viewHolder, string viewName);
+    }
 
+    public class Adapter<T> : IAdapter, IItemRenderCacheOwner, IItemRenderPrewarmer where T : ISimpleViewData
+    {
         protected RecyclerView recyclerView;
         protected List<T> list;
 
         protected int choiceIndex = -1;
         private readonly Dictionary<string, ItemRenderResolver.ItemRenderDefinition> itemRenderDefinitions = new(StringComparer.Ordinal);
-        private readonly Dictionary<ViewHolder, ItemRenderEntry> itemRenders = new();
         private ItemRenderResolver.ItemRenderDefinition defaultItemRenderDefinition;
 
         public int ChoiceIndex
@@ -84,9 +75,9 @@ namespace AlicizaX.UI
                 return;
             }
 
-            string resolvedViewName = string.IsNullOrEmpty(viewName) ? "<default>" : viewName;
-            throw new InvalidOperationException(
-                $"RecyclerView item render is missing for view '{resolvedViewName}'. Holder='{viewHolder.GetType().Name}', Adapter='{GetType().Name}'.");
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+            UnityEngine.Debug.LogError("RecyclerView item render is missing.");
+#endif
         }
 
         public virtual void OnRecycleViewHolder(ViewHolder viewHolder)
@@ -230,6 +221,41 @@ namespace AlicizaX.UI
             return removed;
         }
 
+        public bool UnregisterItemRender(Type itemRenderType)
+        {
+            if (itemRenderType == null)
+            {
+                return false;
+            }
+
+            bool removed = false;
+            if (defaultItemRenderDefinition != null && defaultItemRenderDefinition.ItemRenderType == itemRenderType)
+            {
+                defaultItemRenderDefinition = null;
+                ReleaseCachedItemRenders(string.Empty);
+                removed = true;
+            }
+
+            string removedViewName = null;
+            foreach (var pair in itemRenderDefinitions)
+            {
+                if (pair.Value != null && pair.Value.ItemRenderType == itemRenderType)
+                {
+                    removedViewName = pair.Key;
+                    break;
+                }
+            }
+
+            if (removedViewName != null)
+            {
+                itemRenderDefinitions.Remove(removedViewName);
+                ReleaseCachedItemRenders(removedViewName);
+                removed = true;
+            }
+
+            return removed;
+        }
+
         public void ClearItemRenderRegistrations()
         {
             ReleaseAllItemRenders();
@@ -403,61 +429,47 @@ namespace AlicizaX.UI
             return viewHolder != null;
         }
 
-        private bool TryGetItemRenderDefinition(string viewName, out ItemRenderResolver.ItemRenderDefinition definition)
+        private static bool TryGetItemRender(ViewHolder viewHolder, out IItemRender itemRender)
         {
-            if (!string.IsNullOrEmpty(viewName) && itemRenderDefinitions.TryGetValue(viewName, out definition))
+            itemRender = viewHolder != null ? viewHolder.CachedItemRender : null;
+            return itemRender != null;
+        }
+
+        private static void ReleaseItemRender(ViewHolder viewHolder)
+        {
+            IItemRender itemRender = viewHolder != null ? viewHolder.CachedItemRender : null;
+            if (itemRender == null)
             {
-                return true;
+                return;
             }
 
-            definition = defaultItemRenderDefinition;
-            return definition != null;
+            itemRender.Unbind();
+            if (itemRender is ItemRenderBase itemRenderBase)
+            {
+                itemRenderBase.Detach();
+            }
+
+            viewHolder.CachedItemRender = null;
+            viewHolder.CachedItemRenderViewName = null;
         }
 
         private void UpdateSelectionState(ViewHolder viewHolder, bool selected)
         {
-            if (viewHolder == null)
-            {
-                return;
-            }
-
-            if (TryGetItemRender(viewHolder, out var itemRender))
+            if (TryGetItemRender(viewHolder, out IItemRender itemRender))
             {
                 itemRender.UpdateSelection(selected);
-                return;
             }
-
-            string viewName = string.IsNullOrEmpty(viewHolder.Name) ? "<default>" : viewHolder.Name;
-            throw new InvalidOperationException(
-                $"RecyclerView item render is missing for selection update. View='{viewName}', Holder='{viewHolder.GetType().Name}', Adapter='{GetType().Name}'.");
         }
 
-        private bool TryGetItemRender(ViewHolder viewHolder, out IItemRender itemRender)
+        private bool TryGetItemRenderDefinition(string viewName, out ItemRenderResolver.ItemRenderDefinition definition)
         {
-            if (viewHolder != null &&
-                itemRenders.TryGetValue(viewHolder, out var entry) &&
-                entry.ItemRender != null)
+            if (!string.IsNullOrEmpty(viewName) && itemRenderDefinitions.TryGetValue(viewName, out definition))
             {
-                itemRender = entry.ItemRender;
-                return true;
+                return definition != null;
             }
 
-            itemRender = null;
-            return false;
-        }
-
-        private static void ReleaseItemRender(ItemRenderEntry entry)
-        {
-            if (entry?.ItemRender == null)
-            {
-                return;
-            }
-
-            entry.ItemRender.Unbind();
-            if (entry.ItemRender is ItemRenderBase itemRender)
-            {
-                itemRender.Detach();
-            }
+            definition = defaultItemRenderDefinition;
+            return definition != null;
         }
 
         private bool TryGetOrCreateItemRender(ViewHolder viewHolder, string viewName, out IItemRender itemRender)
@@ -468,17 +480,15 @@ namespace AlicizaX.UI
                 return false;
             }
 
-            if (itemRenders.TryGetValue(viewHolder, out var entry))
+            if (viewHolder.CachedItemRender != null)
             {
-                if (entry.ItemRender != null && string.Equals(entry.ViewName, viewName, StringComparison.Ordinal))
+                if (string.Equals(viewHolder.CachedItemRenderViewName, viewName, StringComparison.Ordinal))
                 {
-                    itemRender = entry.ItemRender;
+                    itemRender = viewHolder.CachedItemRender;
                     return true;
                 }
 
-                ReleaseItemRender(entry);
-                viewHolder.Destroyed -= OnViewHolderDestroyed;
-                itemRenders.Remove(viewHolder);
+                ReleaseItemRender(viewHolder);
             }
 
             if (!TryGetItemRenderDefinition(viewName, out var definition))
@@ -488,8 +498,13 @@ namespace AlicizaX.UI
             }
 
             itemRender = definition.Create(viewHolder, recyclerView, this, SetChoiceIndex);
-            itemRenders[viewHolder] = new ItemRenderEntry(viewName, itemRender);
-            viewHolder.Destroyed += OnViewHolderDestroyed;
+            if (itemRender == null)
+            {
+                return false;
+            }
+
+            viewHolder.CachedItemRender = itemRender;
+            viewHolder.CachedItemRenderViewName = viewName;
             return true;
         }
 
@@ -498,64 +513,40 @@ namespace AlicizaX.UI
             ReleaseAllItemRenders();
         }
 
+        void IItemRenderPrewarmer.PrewarmItemRender(ViewHolder viewHolder, string viewName)
+        {
+            TryGetOrCreateItemRender(viewHolder, viewName, out _);
+        }
+
         private void ReleaseAllItemRenders()
         {
-            foreach (var pair in itemRenders)
+            if (recyclerView?.ViewProvider == null)
             {
-                ReleaseItemRender(pair.Value);
-                if (pair.Key != null)
-                {
-                    pair.Key.Destroyed -= OnViewHolderDestroyed;
-                }
+                return;
             }
 
-            itemRenders.Clear();
+            for (int i = 0; i < recyclerView.ViewProvider.VisibleCount; i++)
+            {
+                ReleaseItemRender(recyclerView.ViewProvider.GetVisibleViewHolder(i));
+            }
         }
 
         private void ReleaseCachedItemRenders(string viewName)
         {
-            if (itemRenders.Count == 0)
+            if (recyclerView?.ViewProvider == null)
             {
                 return;
             }
 
-            List<ViewHolder> viewHoldersToRemove = null;
-            foreach (var pair in itemRenders)
+            for (int i = 0; i < recyclerView.ViewProvider.VisibleCount; i++)
             {
-                if (!string.Equals(pair.Value.ViewName, viewName, StringComparison.Ordinal))
+                ViewHolder viewHolder = recyclerView.ViewProvider.GetVisibleViewHolder(i);
+                if (viewHolder == null || !string.Equals(viewHolder.CachedItemRenderViewName, viewName, StringComparison.Ordinal))
                 {
                     continue;
                 }
 
-                ReleaseItemRender(pair.Value);
-                pair.Key.Destroyed -= OnViewHolderDestroyed;
-                viewHoldersToRemove ??= new List<ViewHolder>();
-                viewHoldersToRemove.Add(pair.Key);
-            }
-
-            if (viewHoldersToRemove == null)
-            {
-                return;
-            }
-
-            for (int i = 0; i < viewHoldersToRemove.Count; i++)
-            {
-                itemRenders.Remove(viewHoldersToRemove[i]);
-            }
-        }
-
-        private void OnViewHolderDestroyed(ViewHolder viewHolder)
-        {
-            if (viewHolder == null)
-            {
-                return;
-            }
-
-            viewHolder.Destroyed -= OnViewHolderDestroyed;
-            if (itemRenders.TryGetValue(viewHolder, out var entry))
-            {
-                ReleaseItemRender(entry);
-                itemRenders.Remove(viewHolder);
+                ReleaseItemRender(viewHolder);
             }
         }
 

Runtime/RecyclerView/Adapter/GroupAdapter.cs

@@ -7,6 +7,7 @@ namespace AlicizaX.UI
     {
         private readonly List<TData> showList = new();
         private readonly string groupViewName;
+        private readonly Dictionary<int, TData> groupsByType = new();
 
         public GroupAdapter(RecyclerView recyclerView, string groupViewName) : base(recyclerView)
         {
@@ -42,12 +43,16 @@ namespace AlicizaX.UI
         {
             if (string.IsNullOrEmpty(groupViewName))
             {
-                throw new InvalidOperationException("GroupAdapter requires a non-empty groupViewName.");
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+                UnityEngine.Debug.LogError("GroupAdapter requires a non-empty groupViewName.");
+#endif
+                return;
             }
 
             if (list == null)
             {
                 showList.Clear();
+                groupsByType.Clear();
                 base.NotifyDataChanged();
                 return;
             }
@@ -80,21 +85,24 @@ namespace AlicizaX.UI
         public override void SetList(List<TData> list)
         {
             showList.Clear();
+            groupsByType.Clear();
             base.SetList(list);
         }
 
         private void CreateGroup(int type)
         {
-            var groupData = showList.Find(data => data.Type == type && data.TemplateName == groupViewName);
-            if (groupData == null)
+            if (groupsByType.ContainsKey(type))
             {
-                groupData = new TData
-                {
-                    TemplateName = groupViewName,
-                    Type = type
-                };
-                showList.Add(groupData);
+                return;
             }
+
+            TData groupData = new TData
+            {
+                TemplateName = groupViewName,
+                Type = type
+            };
+            groupsByType[type] = groupData;
+            showList.Add(groupData);
         }
 
         public void Expand(int index)

Runtime/RecyclerView/Adapter/ItemRender.cs

@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq.Expressions;
 using System.Reflection;
+using Cysharp.Text;
 using UnityEngine.EventSystems;
 
 namespace AlicizaX.UI
@@ -105,8 +106,6 @@ namespace AlicizaX.UI
         /// <summary>
         /// 当前持有者上的交互代理组件。
         /// </summary>
-        private ItemInteractionProxy interactionProxy;
-
         /// <summary>
         /// 当前项被选中时的回调委托。
         /// </summary>
@@ -170,7 +169,7 @@ namespace AlicizaX.UI
         /// <summary>
         /// 获取当前渲染项支持的交互能力。
         /// </summary>
-        public virtual ItemInteractionFlags InteractionFlags => ItemInteractionFlags.None;
+        public virtual ItemInteractionFlags InteractionFlags => Holder != null ? Holder.ItemInteractionFlags : ItemInteractionFlags.None;
 
         /// <summary>
         /// 由框架交互代理读取当前渲染项的交互能力。
@@ -216,12 +215,9 @@ namespace AlicizaX.UI
             {
                 ClearSelectionState();
                 OnClear();
-                if (interactionProxy != null)
-                {
-                    interactionProxy.Clear();
-                    interactionBindingActive = false;
-                    cachedInteractionFlags = ItemInteractionFlags.None;
-                }
+                Holder.ClearInteractionHost();
+                interactionBindingActive = false;
+                cachedInteractionFlags = ItemInteractionFlags.None;
 
                 Holder.DataIndex = -1;
             }
@@ -258,7 +254,7 @@ namespace AlicizaX.UI
             CurrentLayoutIndex = Holder.Index;
             Holder.DataIndex = index;
             CurrentBindingVersion = Holder.BindingVersion;
-            BindInteractionProxyIfNeeded();
+            BindInteractionHostIfNeeded();
             OnBind(itemData, index);
         }
 
@@ -363,7 +359,7 @@ namespace AlicizaX.UI
             if (viewHolder is not THolder holder)
             {
                 throw new InvalidOperationException(
-                    $"RecyclerView item render '{GetType().FullName}' expects holder '{typeof(THolder).FullName}', but got '{viewHolder.GetType().FullName}'.");
+                    ZString.Format("RecyclerView item render '{0}' expects holder '{1}', but got '{2}'.", GetType().FullName, typeof(THolder).FullName, viewHolder.GetType().FullName));
             }
 
             Holder = holder;
@@ -372,11 +368,6 @@ namespace AlicizaX.UI
             this.selectionHandler = selectionHandler;
             interactionBindingActive = false;
             cachedInteractionFlags = ItemInteractionFlags.None;
-            interactionProxy = Holder.GetComponent<ItemInteractionProxy>();
-            if (interactionProxy == null)
-            {
-                interactionProxy = Holder.gameObject.AddComponent<ItemInteractionProxy>();
-            }
             OnHolderAttached();
         }
 
@@ -391,8 +382,7 @@ namespace AlicizaX.UI
             }
 
             OnHolderDetached();
-            interactionProxy?.Clear();
-            interactionProxy = null;
+            Holder.ClearInteractionHost();
             selectionHandler = null;
             Holder = null;
             RecyclerView = null;
@@ -414,7 +404,7 @@ namespace AlicizaX.UI
             if (Holder == null)
             {
                 throw new InvalidOperationException(
-                    $"RecyclerView item render '{GetType().FullName}' has not been initialized with a holder.");
+                    ZString.Format("RecyclerView item render '{0}' has not been initialized with a holder.", GetType().FullName));
             }
         }
 
@@ -435,20 +425,15 @@ namespace AlicizaX.UI
         /// <summary>
         /// 在需要时将当前渲染实例绑定到交互代理。
         /// </summary>
-        private void BindInteractionProxyIfNeeded()
+        private void BindInteractionHostIfNeeded()
         {
-            if (interactionProxy == null)
-            {
-                return;
-            }
-
             ItemInteractionFlags interactionFlags = InteractionFlags;
             if (interactionBindingActive && cachedInteractionFlags == interactionFlags)
             {
                 return;
             }
 
-            interactionProxy.Bind(this);
+            Holder.BindInteractionHost(this);
             cachedInteractionFlags = interactionFlags;
             interactionBindingActive = true;
         }
@@ -698,19 +683,23 @@ namespace AlicizaX.UI
             {
                 if (viewHolder == null)
                 {
-                    throw new ArgumentNullException(nameof(viewHolder));
+                    return null;
                 }
 
                 if (!HolderType.IsInstanceOfType(viewHolder))
                 {
-                    throw new InvalidOperationException(
-                        $"RecyclerView item render '{ItemRenderType.FullName}' expects holder '{HolderType.FullName}', but got '{viewHolder.GetType().FullName}'.");
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+                    UnityEngine.Debug.LogError(ZString.Format("RecyclerView item render '{0}' expects holder '{1}', but got '{2}'.", ItemRenderType.FullName, HolderType.FullName, viewHolder.GetType().FullName));
+#endif
+                    return null;
                 }
 
                 if (createInstance() is not ItemRenderBase itemRender)
                 {
-                    throw new InvalidOperationException(
-                        $"RecyclerView item render '{ItemRenderType.FullName}' could not be created.");
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+                    UnityEngine.Debug.LogError(ZString.Format("RecyclerView item render '{0}' could not be created.", ItemRenderType.FullName));
+#endif
+                    return null;
                 }
 
                 itemRender.Attach(viewHolder, recyclerView, adapter, selectionHandler);
@@ -758,13 +747,13 @@ namespace AlicizaX.UI
                 !typeof(IItemRender).IsAssignableFrom(itemRenderType))
             {
                 throw new InvalidOperationException(
-                    $"RecyclerView item render type '{itemRenderType.FullName}' is invalid.");
+                    ZString.Format("RecyclerView item render type '{0}' is invalid.", itemRenderType.FullName));
             }
 
             if (!TryGetHolderType(itemRenderType, out Type holderType))
             {
                 throw new InvalidOperationException(
-                    $"RecyclerView item render '{itemRenderType.FullName}' must inherit from ItemRender<TData, THolder>.");
+                    ZString.Format("RecyclerView item render '{0}' must inherit from ItemRender<TData, THolder>.", itemRenderType.FullName));
             }
 
             ConstructorInfo constructor = itemRenderType.GetConstructor(
@@ -776,7 +765,7 @@ namespace AlicizaX.UI
             if (constructor == null)
             {
                 throw new InvalidOperationException(
-                    $"RecyclerView item render '{itemRenderType.FullName}' must have a parameterless constructor.");
+                    ZString.Format("RecyclerView item render '{0}' must have a parameterless constructor.", itemRenderType.FullName));
             }
 
             return new ItemRenderDefinition(itemRenderType, holderType, CreateFactory(constructor));

Runtime/RecyclerView/Layout/CircleLayoutManager.cs

@@ -107,9 +107,15 @@ namespace AlicizaX.UI
 
         public override void DoItemAnimation()
         {
-            var viewHolders = viewProvider.ViewHolders;
-            for (int i = 0; i < viewHolders.Count; i++)
+            int visibleCount = viewProvider.VisibleCount;
+            for (int i = 0; i < visibleCount; i++)
             {
+                ViewHolder viewHolder = viewProvider.GetVisibleViewHolder(i);
+                if (viewHolder == null)
+                {
+                    continue;
+                }
+
                 float angle = i * intervalAngle + initalAngle;
                 angle = circleDirection == CircleDirection.Positive ? angle + ScrollPosition : angle - ScrollPosition;
                 float delta = (angle - initalAngle) % 360;
@@ -118,7 +124,7 @@ namespace AlicizaX.UI
                 float scale = delta < intervalAngle ? (1.4f - delta / intervalAngle) : 1;
                 scale = Mathf.Max(scale, 1);
 
-                viewHolders[i].RectTransform.localScale = Vector3.one * scale;
+                viewHolder.RectTransform.localScale = Vector3.one * scale;
             }
         }
     }

Runtime/RecyclerView/Layout/LayoutManager.cs

@@ -104,8 +104,15 @@ namespace AlicizaX.UI
 
         public void UpdateLayout()
         {
-            foreach (var viewHolder in viewProvider.ViewHolders)
+            int visibleCount = viewProvider.VisibleCount;
+            for (int i = 0; i < visibleCount; i++)
             {
+                ViewHolder viewHolder = viewProvider.GetVisibleViewHolder(i);
+                if (viewHolder == null)
+                {
+                    continue;
+                }
+
                 Layout(viewHolder, viewHolder.Index);
             }
         }

Runtime/RecyclerView/Layout/PageLayoutManager.cs

@@ -94,14 +94,20 @@ namespace AlicizaX.UI
 
         public override void DoItemAnimation()
         {
-            var viewHolders = viewProvider.ViewHolders;
-            for (int i = 0; i < viewHolders.Count; i++)
+            int visibleCount = viewProvider.VisibleCount;
+            for (int i = 0; i < visibleCount; i++)
             {
-                float viewPos = direction == Direction.Vertical ? -viewHolders[i].RectTransform.anchoredPosition.y : viewHolders[i].RectTransform.anchoredPosition.x;
+                ViewHolder viewHolder = viewProvider.GetVisibleViewHolder(i);
+                if (viewHolder == null)
+                {
+                    continue;
+                }
+
+                float viewPos = direction == Direction.Vertical ? -viewHolder.RectTransform.anchoredPosition.y : viewHolder.RectTransform.anchoredPosition.x;
                 float scale = 1 - Mathf.Min(Mathf.Abs(viewPos) * 0.0006f, 1f);
                 scale = Mathf.Max(scale, minScale);
 
-                viewHolders[i].RectTransform.localScale = Vector3.one * scale;
+                viewHolder.RectTransform.localScale = Vector3.one * scale;
             }
         }
     }

Runtime/RecyclerView/ObjectPool/MixedObjectPool.cs

@@ -8,6 +8,7 @@ namespace AlicizaX.UI
         private const int DEFAULT_MAX_SIZE_PER_TYPE = 10;
 
         private readonly Dictionary<string, Stack<T>> entries;
+        private readonly Dictionary<T, string> activeEntries;
         private readonly Dictionary<string, int> typeSize;
         private readonly Dictionary<string, int> activeCountByType;
         private readonly Dictionary<string, int> peakActiveByType;
@@ -17,6 +18,7 @@ namespace AlicizaX.UI
         private int hitCount;
         private int missCount;
         private int destroyCount;
+        private bool disposed;
 
         public MixedObjectPool(IMixedObjectFactory<T> factory) : this(factory, DEFAULT_MAX_SIZE_PER_TYPE)
         {
@@ -33,6 +35,7 @@ namespace AlicizaX.UI
             }
 
             entries = new Dictionary<string, Stack<T>>(StringComparer.Ordinal);
+            activeEntries = new Dictionary<T, string>();
             typeSize = new Dictionary<string, int>(StringComparer.Ordinal);
             activeCountByType = new Dictionary<string, int>(StringComparer.Ordinal);
             peakActiveByType = new Dictionary<string, int>(StringComparer.Ordinal);
@@ -40,18 +43,26 @@ namespace AlicizaX.UI
 
         public T Allocate(string typeName)
         {
+            if (disposed)
+            {
+                return null;
+            }
+
             Stack<T> stack = GetOrCreateStack(typeName);
             if (stack.Count > 0)
             {
                 T obj = stack.Pop();
                 hitCount++;
+                activeEntries[obj] = typeName;
                 TrackAllocate(typeName);
                 return obj;
             }
 
             missCount++;
+            T created = factory.Create(typeName);
+            activeEntries[created] = typeName;
             TrackAllocate(typeName);
-            return factory.Create(typeName);
+            return created;
         }
 
         public void Free(string typeName, T obj)
@@ -60,6 +71,16 @@ namespace AlicizaX.UI
 
             if (!factory.Validate(typeName, obj))
             {
+                activeEntries.Remove(obj);
+                factory.Destroy(typeName, obj);
+                destroyCount++;
+                TrackFree(typeName);
+                return;
+            }
+
+            if (disposed)
+            {
+                activeEntries.Remove(obj);
                 factory.Destroy(typeName, obj);
                 destroyCount++;
                 TrackFree(typeName);
@@ -70,6 +91,7 @@ namespace AlicizaX.UI
             Stack<T> stack = GetOrCreateStack(typeName);
 
             factory.Reset(typeName, obj);
+            activeEntries.Remove(obj);
             TrackFree(typeName);
 
             if (stack.Count >= maxSize)
@@ -99,6 +121,11 @@ namespace AlicizaX.UI
 
         public void EnsureCapacity(string typeName, int value)
         {
+            if (disposed)
+            {
+                return;
+            }
+
             if (value <= 0)
             {
                 throw new ArgumentOutOfRangeException(nameof(value));
@@ -113,6 +140,11 @@ namespace AlicizaX.UI
 
         public void Warm(string typeName, int count)
         {
+            if (disposed)
+            {
+                return;
+            }
+
             if (count <= 0)
             {
                 return;
@@ -169,8 +201,14 @@ namespace AlicizaX.UI
             peakActiveByType.Clear();
         }
 
+        public void ClearInactive()
+        {
+            Clear();
+        }
+
         public void Dispose()
         {
+            disposed = true;
             Clear();
             GC.SuppressFinalize(this);
         }

Runtime/RecyclerView/ObjectPool/ObjectPool.cs

@@ -6,6 +6,7 @@ namespace AlicizaX.UI
     public class ObjectPool<T> : IObjectPool<T> where T : class
     {
         private readonly Stack<T> entries;
+        private readonly HashSet<T> activeEntries;
         private readonly int initialSize;
         private int maxSize;
         protected readonly IObjectFactory<T> factory;
@@ -15,6 +16,7 @@ namespace AlicizaX.UI
         private int missCount;
         private int destroyCount;
         private int peakActive;
+        private bool disposed;
 
         public ObjectPool(IObjectFactory<T> factory) : this(factory, Environment.ProcessorCount * 2)
         {
@@ -36,6 +38,7 @@ namespace AlicizaX.UI
             }
 
             entries = new Stack<T>(maxSize);
+            activeEntries = new HashSet<T>();
             Warm(initialSize);
         }
 
@@ -59,6 +62,11 @@ namespace AlicizaX.UI
 
         public virtual T Allocate()
         {
+            if (disposed)
+            {
+                return null;
+            }
+
             T value;
             if (entries.Count > 0)
             {
@@ -67,6 +75,7 @@ namespace AlicizaX.UI
                 {
                     hitCount++;
                     activeCount++;
+                    activeEntries.Add(value);
                     if (activeCount > peakActive)
                     {
                         peakActive = activeCount;
@@ -79,6 +88,7 @@ namespace AlicizaX.UI
             value = factory.Create();
             totalCount++;
             activeCount++;
+            activeEntries.Add(value);
             if (activeCount > peakActive)
             {
                 peakActive = activeCount;
@@ -93,6 +103,7 @@ namespace AlicizaX.UI
 
             if (!factory.Validate(obj))
             {
+                activeEntries.Remove(obj);
                 factory.Destroy(obj);
                 destroyCount++;
                 if (totalCount > 0)
@@ -108,12 +119,29 @@ namespace AlicizaX.UI
                 return;
             }
 
+            if (disposed)
+            {
+                activeEntries.Remove(obj);
+                factory.Destroy(obj);
+                destroyCount++;
+                if (totalCount > 0)
+                {
+                    totalCount--;
+                }
+                if (activeCount > 0)
+                {
+                    activeCount--;
+                }
+                return;
+            }
+
             factory.Reset(obj);
 
             if (activeCount > 0)
             {
                 activeCount--;
             }
+            activeEntries.Remove(obj);
 
             if (entries.Count < maxSize)
             {
@@ -151,17 +179,29 @@ namespace AlicizaX.UI
                 }
             }
 
+            activeCount = activeEntries.Count;
             totalCount = activeCount;
         }
 
+        public void ClearInactive()
+        {
+            Clear();
+        }
+
         public void Dispose()
         {
+            disposed = true;
             Clear();
             GC.SuppressFinalize(this);
         }
 
         public void EnsureCapacity(int value)
         {
+            if (disposed)
+            {
+                return;
+            }
+
             if (value <= 0)
             {
                 throw new ArgumentOutOfRangeException(nameof(value));
@@ -175,6 +215,11 @@ namespace AlicizaX.UI
 
         public void Warm(int count)
         {
+            if (disposed)
+            {
+                return;
+            }
+
             if (count <= 0)
             {
                 return;

Runtime/RecyclerView/ObjectPool/UnityComponentFactory.cs

@@ -16,6 +16,11 @@ namespace AlicizaX.UI
         public T Create()
         {
             T obj = Object.Instantiate(template, parent);
+            if (obj is ViewHolder viewHolder)
+            {
+                viewHolder.RefreshInteractionCache();
+            }
+
             return obj;
         }
 

Runtime/RecyclerView/ObjectPool/UnityMixedComponentFactory.cs

@@ -50,6 +50,11 @@ namespace AlicizaX.UI
                 obj.transform.localScale = Vector3.one;
             }
 
+            if (obj is ViewHolder viewHolder)
+            {
+                viewHolder.RefreshInteractionCache();
+            }
+
             return obj;
         }
 

Runtime/RecyclerView/Scroller/CircleScroller.cs

@@ -7,8 +7,9 @@ namespace AlicizaX.UI
     {
         private Vector2 centerPosition;
 
-        private void Awake()
+        protected override void Awake()
         {
+            base.Awake();
             RectTransform rectTransform = GetComponent<RectTransform>();
             Vector2 position = transform.position;
             Vector2 size = rectTransform.sizeDelta;

Runtime/RecyclerView/Scroller/ScrollbarEx.cs

@@ -14,11 +14,13 @@ namespace AlicizaX.UI
 
         private bool dragging;
         private bool hovering;
+        private float targetHandleScale = 1f;
 
         private void Awake()
         {
             scrollbar = GetComponent<Scrollbar>();
             handle = scrollbar.handleRect;
+            targetHandleScale = GetCurrentHandleScale();
         }
 
         public void OnBeginDrag(PointerEventData eventData)
@@ -31,23 +33,7 @@ namespace AlicizaX.UI
             dragging = false;
             if (!hovering)
             {
-                if (scrollbar.direction == Scrollbar.Direction.TopToBottom ||
-                    scrollbar.direction == Scrollbar.Direction.BottomToTop)
-                {
-#if PRIMETWEEN_SUPPORT
-                    PrimeTween.Tween.ScaleX(handle, 1f, 0.2f);
-#else
-                    handle.localScale = new Vector3(1,handle.localScale.y,handle.localScale.z);
-#endif
-                }
-                else
-                {
-#if PRIMETWEEN_SUPPORT
-                    PrimeTween.Tween.ScaleY(handle, 1f, 0.2f);
-#else
-                    handle.localScale = new Vector3(handle.localScale.x,1,handle.localScale.z);
-#endif
-                }
+                SetHandleScale(1f);
             }
 
             OnDragEnd?.Invoke();
@@ -56,24 +42,7 @@ namespace AlicizaX.UI
         public void OnPointerEnter(PointerEventData eventData)
         {
             hovering = true;
-            if (scrollbar.direction == Scrollbar.Direction.TopToBottom ||
-                scrollbar.direction == Scrollbar.Direction.BottomToTop)
-            {
-#if PRIMETWEEN_SUPPORT
-                PrimeTween.Tween.ScaleX(handle, 2f, 0.2f);
-#else
-                handle.localScale = new Vector3(2,handle.localScale.y,handle.localScale.z);
-#endif
-            }
-            else
-            {
-#if PRIMETWEEN_SUPPORT
-                PrimeTween.Tween.ScaleY(handle, 2f, 0.2f);
-#else
-                handle.localScale = new Vector3(handle.localScale.x, 2, handle.localScale.z);
-#endif
-
-            }
+            SetHandleScale(2f);
         }
 
         public void OnPointerExit(PointerEventData eventData)
@@ -81,24 +50,58 @@ namespace AlicizaX.UI
             hovering = false;
             if (!dragging)
             {
-                if (scrollbar.direction == Scrollbar.Direction.TopToBottom ||
-                    scrollbar.direction == Scrollbar.Direction.BottomToTop)
-                {
-#if PRIMETWEEN_SUPPORT
-                    PrimeTween.Tween.ScaleX(handle, 1f, 0.2f);
-#else
-                    handle.localScale = new Vector3(1,handle.localScale.y,handle.localScale.z);
-#endif
-                }
-                else
-                {
-#if PRIMETWEEN_SUPPORT
-                    PrimeTween.Tween.ScaleY(handle, 1f, 0.2f);
-#else
-                    handle.localScale = new Vector3(handle.localScale.x,1,handle.localScale.z);
-#endif
-                }
+                SetHandleScale(1f);
             }
         }
+
+        private void SetHandleScale(float target)
+        {
+            if (handle == null || Mathf.Approximately(targetHandleScale, target))
+            {
+                return;
+            }
+
+            targetHandleScale = target;
+            bool vertical = IsVerticalScrollbar();
+#if PRIMETWEEN_SUPPORT
+            if (vertical)
+            {
+                PrimeTween.Tween.ScaleX(handle, target, 0.2f);
+            }
+            else
+            {
+                PrimeTween.Tween.ScaleY(handle, target, 0.2f);
+            }
+#else
+            Vector3 scale = handle.localScale;
+            if (vertical)
+            {
+                scale.x = target;
+            }
+            else
+            {
+                scale.y = target;
+            }
+
+            handle.localScale = scale;
+#endif
+        }
+
+        private float GetCurrentHandleScale()
+        {
+            if (handle == null)
+            {
+                return 1f;
+            }
+
+            return IsVerticalScrollbar() ? handle.localScale.x : handle.localScale.y;
+        }
+
+        private bool IsVerticalScrollbar()
+        {
+            return scrollbar != null &&
+                   (scrollbar.direction == Scrollbar.Direction.TopToBottom ||
+                    scrollbar.direction == Scrollbar.Direction.BottomToTop);
+        }
     }
 }

Runtime/RecyclerView/Scroller/Scroller.cs

@@ -1,4 +1,3 @@
-using System.Collections;
 using UnityEngine;
 using UnityEngine.EventSystems;
 
@@ -6,16 +5,27 @@ namespace AlicizaX.UI
 {
     public class Scroller : MonoBehaviour, IScroller, IBeginDragHandler, IEndDragHandler, IDragHandler, IScrollHandler
     {
-        private static readonly WaitForEndOfFrame EndOfFrameYield = new();
-        private Coroutine movementCoroutine;
+        protected enum MotionState
+        {
+            Idle,
+            Smooth,
+            Duration,
+            Inertia
+        }
 
         protected float position;
-        public float Position { get => position; set => position = value; }
+
+        public float Position
+        {
+            get => position;
+            set => position = value;
+        }
 
         protected float velocity;
         public float Velocity => velocity;
 
         protected Direction direction;
+
         public Direction Direction
         {
             get => direction;
@@ -23,6 +33,7 @@ namespace AlicizaX.UI
         }
 
         protected Vector2 contentSize;
+
         public Vector2 ContentSize
         {
             get => contentSize;
@@ -30,6 +41,7 @@ namespace AlicizaX.UI
         }
 
         protected Vector2 viewSize;
+
         public Vector2 ViewSize
         {
             get => viewSize;
@@ -37,6 +49,7 @@ namespace AlicizaX.UI
         }
 
         protected float scrollSpeed = 1f;
+
         public float ScrollSpeed
         {
             get => scrollSpeed;
@@ -44,6 +57,7 @@ namespace AlicizaX.UI
         }
 
         protected float wheelSpeed = 30f;
+
         public float WheelSpeed
         {
             get => wheelSpeed;
@@ -51,6 +65,7 @@ namespace AlicizaX.UI
         }
 
         protected bool snap;
+
         public bool Snap
         {
             get => snap;
@@ -61,20 +76,72 @@ namespace AlicizaX.UI
         protected MoveStopEvent moveStopEvent = new();
         protected DraggingEvent draggingEvent = new();
 
-        public float MaxPosition => direction == Direction.Vertical ?
-                                Mathf.Max(contentSize.y - viewSize.y, 0) :
-                                Mathf.Max(contentSize.x - viewSize.x, 0);
+        private MotionState motionState;
+        private float motionStartPosition;
+        private float motionTargetPosition;
+        private float motionElapsed;
+        private float motionDuration;
+        private float motionSpeed;
+        private float inertiaVelocity;
+
+        public float MaxPosition => direction == Direction.Vertical ? Mathf.Max(contentSize.y - viewSize.y, 0) : Mathf.Max(contentSize.x - viewSize.x, 0);
 
         public float ViewLength => direction == Direction.Vertical ? viewSize.y : viewSize.x;
 
-        public ScrollerEvent OnValueChanged { get => scrollerEvent; set => scrollerEvent = value; }
+        public ScrollerEvent OnValueChanged
+        {
+            get => scrollerEvent;
+            set => scrollerEvent = value;
+        }
 
-        public MoveStopEvent OnMoveStoped { get => moveStopEvent; set => moveStopEvent = value; }
+        public MoveStopEvent OnMoveStoped
+        {
+            get => moveStopEvent;
+            set => moveStopEvent = value;
+        }
 
-        public DraggingEvent OnDragging { get => draggingEvent; set => draggingEvent = value; }
+        public DraggingEvent OnDragging
+        {
+            get => draggingEvent;
+            set => draggingEvent = value;
+        }
 
         public float dragStopTime = 0f;
 
+        public bool InputEnabled { get; set; } = true;
+
+        protected virtual void Awake()
+        {
+        }
+
+        protected virtual void Update()
+        {
+            if (motionState == MotionState.Idle)
+            {
+                return;
+            }
+
+            TickMotion(Time.deltaTime);
+        }
+
+        private void TickMotion(float deltaTime)
+        {
+            switch (motionState)
+            {
+                case MotionState.Smooth:
+                    TickSmooth(deltaTime);
+                    break;
+                case MotionState.Duration:
+                    TickDuration(deltaTime);
+                    break;
+                case MotionState.Inertia:
+                    TickInertia(deltaTime);
+                    break;
+                default:
+                    motionState = MotionState.Idle;
+                    break;
+            }
+        }
 
         public virtual void ScrollTo(float position, bool smooth = false)
         {
@@ -86,11 +153,10 @@ namespace AlicizaX.UI
             {
                 this.position = position;
                 OnValueChanged?.Invoke(this.position);
+                return;
             }
-            else
-            {
-                movementCoroutine = StartCoroutine(RunMotion(MoveTo(position)));
-            }
+
+            StartPositionMotion(position, scrollSpeed);
         }
 
         public virtual void ScrollToDuration(float position, float duration)
@@ -108,7 +174,11 @@ namespace AlicizaX.UI
                 return;
             }
 
-            movementCoroutine = StartCoroutine(RunMotion(ToPositionByDuration(position, duration)));
+            motionState = MotionState.Duration;
+            motionStartPosition = this.position;
+            motionTargetPosition = position;
+            motionDuration = Mathf.Max(duration, 0.0001f);
+            motionElapsed = 0f;
         }
 
         public virtual void ScrollToRatio(float ratio)
@@ -118,12 +188,22 @@ namespace AlicizaX.UI
 
         public void OnBeginDrag(PointerEventData eventData)
         {
+            if (!InputEnabled)
+            {
+                return;
+            }
+
             OnDragging?.Invoke(true);
             StopMovement();
         }
 
         public void OnEndDrag(PointerEventData eventData)
         {
+            if (!InputEnabled)
+            {
+                return;
+            }
+
             Inertia();
             Elastic();
             OnDragging?.Invoke(false);
@@ -131,6 +211,11 @@ namespace AlicizaX.UI
 
         public void OnDrag(PointerEventData eventData)
         {
+            if (!InputEnabled)
+            {
+                return;
+            }
+
             dragStopTime = Time.time;
 
             velocity = GetDelta(eventData);
@@ -141,6 +226,11 @@ namespace AlicizaX.UI
 
         public void OnScroll(PointerEventData eventData)
         {
+            if (!InputEnabled)
+            {
+                return;
+            }
+
             StopMovement();
 
             float rate = GetScrollRate() * wheelSpeed;
@@ -158,32 +248,41 @@ namespace AlicizaX.UI
             return direction == Direction.Vertical ? eventData.delta.y * rate : -eventData.delta.x * rate;
         }
 
-        private float GetScrollRate()
+        protected float GetScrollRate()
         {
             float rate = 1f;
+            float viewLength = ViewLength;
+            if (viewLength <= 0f)
+            {
+                return rate;
+            }
+
             if (position < 0)
             {
-                rate = Mathf.Max(0, 1 - (Mathf.Abs(position) / ViewLength));
+                rate = Mathf.Max(0, 1 - (Mathf.Abs(position) / viewLength));
             }
             else if (position > MaxPosition)
             {
-                rate = Mathf.Max(0, 1 - (Mathf.Abs(position - MaxPosition) / ViewLength));
+                rate = Mathf.Max(0, 1 - (Mathf.Abs(position - MaxPosition) / viewLength));
             }
+
             return rate;
         }
 
         protected virtual void Inertia()
         {
+            if (Mathf.Abs(velocity) <= 0.1f)
+            {
+                CompleteMotion(true);
+                return;
+            }
 
-            if (Mathf.Abs(velocity) > 0.1f)
-            {
-                StopMovement();
-                movementCoroutine = StartCoroutine(RunMotion(InertiaTo()));
-            }
-            else
-            {
-                OnMoveStoped?.Invoke();
-            }
+            StopMovement();
+            motionState = MotionState.Inertia;
+            motionStartPosition = position;
+            motionElapsed = 0f;
+            motionDuration = snap ? 0.1f : 1f;
+            inertiaVelocity = velocity > 0 ? Mathf.Min(velocity, 100) : Mathf.Max(velocity, -100);
         }
 
         protected virtual void Elastic()
@@ -191,98 +290,105 @@ namespace AlicizaX.UI
             if (position < 0)
             {
                 StopMovement();
-                movementCoroutine = StartCoroutine(RunMotion(ElasticTo(0)));
+                StartPositionMotion(0, 7f);
             }
             else if (position > MaxPosition)
             {
                 StopMovement();
-                movementCoroutine = StartCoroutine(RunMotion(ElasticTo(MaxPosition)));
+                StartPositionMotion(MaxPosition, 7f);
             }
         }
 
-        IEnumerator InertiaTo()
+        protected void StopMovement()
         {
-            float timer = 0f;
-            float p = position;
-            float v = velocity > 0 ? Mathf.Min(velocity, 100) : Mathf.Max(velocity, -100);
-            float duration = snap ? 0.1f : 1f;
-            while (timer < duration)
+            motionState = MotionState.Idle;
+        }
+
+        private void StartPositionMotion(float targetPosition, float speed)
+        {
+            motionState = MotionState.Smooth;
+            motionStartPosition = position;
+            motionTargetPosition = targetPosition;
+            motionElapsed = Time.deltaTime;
+            motionSpeed = speed;
+        }
+
+        private void TickSmooth(float deltaTime)
+        {
+            if (Mathf.Abs(motionTargetPosition - position) <= 0.1f)
             {
-                float y = (float)EaseUtil.EaseOutCirc(timer) * 40;
-                timer += Time.deltaTime;
-                position = p + y * v;
-
-                Elastic();
-
+                position = motionTargetPosition;
                 OnValueChanged?.Invoke(position);
-
-                yield return EndOfFrameYield;
-            }
-
-            OnMoveStoped?.Invoke();
-        }
-
-        IEnumerator ElasticTo(float targetPos)
-        {
-            yield return ToPosition(targetPos, 7);
-        }
-
-        IEnumerator MoveTo(float targetPos)
-        {
-            yield return ToPosition(targetPos, scrollSpeed);
-        }
-
-        IEnumerator ToPositionByDuration(float targetPos, float duration)
-        {
-            duration = Mathf.Max(duration, 0.0001f);
-            float startPos = position;
-            float elapsed = 0f;
-            while (elapsed < duration)
-            {
-                elapsed += Time.deltaTime;
-                float t = Mathf.Clamp01(elapsed / duration);
-                position = Mathf.Lerp(startPos, targetPos, t);
-                OnValueChanged?.Invoke(position);
-                yield return EndOfFrameYield;
-            }
-
-            position = targetPos;
-            OnValueChanged?.Invoke(position);
-        }
-
-        IEnumerator ToPosition(float targetPos, float speed)
-        {
-            float startPos = position;
-            float time = Time.deltaTime;
-            while (Mathf.Abs(targetPos - position) > 0.1f)
-            {
-                position = Mathf.Lerp(startPos, targetPos, time * speed);
-                OnValueChanged?.Invoke(position);
-
-                time += Time.deltaTime;
-
-                yield return EndOfFrameYield;
-            }
-
-            position = targetPos;
-            OnValueChanged?.Invoke(position);
-        }
-
-        private IEnumerator RunMotion(IEnumerator motion)
-        {
-            yield return motion;
-            movementCoroutine = null;
-        }
-
-        private void StopMovement()
-        {
-            if (movementCoroutine == null)
-            {
+                CompleteMotion(false);
                 return;
             }
 
-            StopCoroutine(movementCoroutine);
-            movementCoroutine = null;
+            position = Mathf.Lerp(motionStartPosition, motionTargetPosition, motionElapsed * motionSpeed);
+            motionElapsed += deltaTime;
+            OnValueChanged?.Invoke(position);
+        }
+
+        private void TickDuration(float deltaTime)
+        {
+            motionElapsed += deltaTime;
+            float t = Mathf.Clamp01(motionElapsed / motionDuration);
+            position = Mathf.Lerp(motionStartPosition, motionTargetPosition, t);
+            OnValueChanged?.Invoke(position);
+
+            if (t >= 1f)
+            {
+                position = motionTargetPosition;
+                OnValueChanged?.Invoke(position);
+                CompleteMotion(false);
+            }
+        }
+
+        private void TickInertia(float deltaTime)
+        {
+            motionElapsed += deltaTime;
+            float t = Mathf.Clamp01(motionElapsed / motionDuration);
+            float y = (float)EaseUtil.EaseOutCirc(t) * 40f;
+            float nextPosition = motionStartPosition + y * inertiaVelocity;
+            float maxPosition = MaxPosition;
+
+            if (nextPosition < 0f)
+            {
+                position = 0f;
+                OnValueChanged?.Invoke(position);
+                StopMovement();
+                StartPositionMotion(0f, 7f);
+                return;
+            }
+
+            if (nextPosition > maxPosition)
+            {
+                position = maxPosition;
+                OnValueChanged?.Invoke(position);
+                StopMovement();
+                StartPositionMotion(maxPosition, 7f);
+                return;
+            }
+
+            position = nextPosition;
+            OnValueChanged?.Invoke(position);
+
+            if (t >= 1f)
+            {
+                CompleteMotion(true);
+            }
+        }
+
+        private void CompleteMotion(bool notifyStopped)
+        {
+            motionState = MotionState.Idle;
+            velocity = 0f;
+
+            if (notifyStopped)
+            {
+                OnMoveStoped?.Invoke();
+            }
         }
     }
+
+
 }

Runtime/RecyclerView/UGList.cs

@@ -165,7 +165,7 @@ namespace AlicizaX.UI
 
         public bool UnregisterItemRender(Type itemRenderType)
         {
-            return UnregisterItemRender(nameof(itemRenderType));
+            return _adapter.UnregisterItemRender(itemRenderType);
         }
 
 

Runtime/RecyclerView/ViewHolder/ViewHolder.Interaction.cs

@@ -1,11 +1,11 @@
 using UnityEngine;
 using UnityEngine.EventSystems;
 using UnityEngine.UI;
+using Cysharp.Text;
 
 namespace AlicizaX.UI
 {
-    [DisallowMultipleComponent]
-    public sealed class ItemInteractionProxy : MonoBehaviour,
+    public abstract partial class ViewHolder :
         IPointerClickHandler,
         IPointerEnterHandler,
         IPointerExitHandler,
@@ -23,22 +23,31 @@ namespace AlicizaX.UI
         ICancelHandler
 #endif
     {
-        private IItemInteractionHost host;
-        private ItemInteractionFlags flags;
-        private Selectable focusAnchor;
+        [SerializeField]
+        private ItemInteractionFlags itemInteractionFlags = ItemInteractionFlags.None;
+
+        private IItemInteractionHost interactionHost;
+        private ItemInteractionFlags activeInteractionFlags;
         private RecyclerItemSelectable ownedSelectable;
         private Scroller parentScroller;
+        private bool missingSelectableLogged;
 
-        internal void Bind(IItemInteractionHost interactionHost)
+        public ItemInteractionFlags ItemInteractionFlags
         {
-            host = interactionHost;
-            flags = interactionHost?.InteractionFlags ?? ItemInteractionFlags.None;
-            parentScroller = GetComponentInParent<Scroller>();
+            get => itemInteractionFlags;
+            set => itemInteractionFlags = value;
+        }
+
+        internal void BindInteractionHost(IItemInteractionHost host)
+        {
+            interactionHost = host;
+            activeInteractionFlags = host?.InteractionFlags ?? itemInteractionFlags;
+            parentScroller = RecyclerView != null ? RecyclerView.Scroller : null;
             EnsureFocusAnchor();
 
             if (ownedSelectable != null)
             {
-                bool requiresSelection = RequiresSelection(flags);
+                bool requiresSelection = RequiresSelection(activeInteractionFlags);
                 ownedSelectable.interactable = requiresSelection;
                 ownedSelectable.enabled = requiresSelection;
             }
@@ -46,10 +55,10 @@ namespace AlicizaX.UI
             InvalidateNavigationScope();
         }
 
-        public void Clear()
+        internal void ClearInteractionHost()
         {
-            host = null;
-            flags = ItemInteractionFlags.None;
+            interactionHost = null;
+            activeInteractionFlags = ItemInteractionFlags.None;
             parentScroller = null;
 
             if (ownedSelectable != null)
@@ -61,45 +70,27 @@ namespace AlicizaX.UI
             InvalidateNavigationScope();
         }
 
-        public Selectable GetSelectable()
-        {
-            EnsureFocusAnchor();
-            return focusAnchor;
-        }
-
-        internal bool TryGetFocusTarget(out GameObject target)
-        {
-            target = null;
-            if (!TryGetFocusableSelectable(out Selectable selectable))
-            {
-                return false;
-            }
-
-            target = selectable.gameObject;
-            return target != null;
-        }
-
         public void OnPointerClick(PointerEventData eventData)
         {
-            if ((flags & ItemInteractionFlags.PointerClick) != 0)
+            if ((activeInteractionFlags & ItemInteractionFlags.PointerClick) != 0)
             {
-                host?.HandlePointerClick(eventData);
+                interactionHost?.HandlePointerClick(eventData);
             }
         }
 
         public void OnPointerEnter(PointerEventData eventData)
         {
-            if ((flags & ItemInteractionFlags.PointerEnter) != 0)
+            if ((activeInteractionFlags & ItemInteractionFlags.PointerEnter) != 0)
             {
-                host?.HandlePointerEnter(eventData);
+                interactionHost?.HandlePointerEnter(eventData);
             }
         }
 
         public void OnPointerExit(PointerEventData eventData)
         {
-            if ((flags & ItemInteractionFlags.PointerExit) != 0)
+            if ((activeInteractionFlags & ItemInteractionFlags.PointerExit) != 0)
             {
-                host?.HandlePointerExit(eventData);
+                interactionHost?.HandlePointerExit(eventData);
             }
         }
 
@@ -109,9 +100,9 @@ namespace AlicizaX.UI
 #if INPUTSYSTEM_SUPPORT
             UXNavigationRuntime.NotifySelection(gameObject);
 #endif
-            if ((flags & ItemInteractionFlags.Select) != 0)
+            if ((activeInteractionFlags & ItemInteractionFlags.Select) != 0)
             {
-                host?.HandleSelect(eventData);
+                interactionHost?.HandleSelect(eventData);
             }
 #endif
         }
@@ -119,9 +110,9 @@ namespace AlicizaX.UI
         public void OnDeselect(BaseEventData eventData)
         {
 #if UX_NAVIGATION
-            if ((flags & ItemInteractionFlags.Deselect) != 0)
+            if ((activeInteractionFlags & ItemInteractionFlags.Deselect) != 0)
             {
-                host?.HandleDeselect(eventData);
+                interactionHost?.HandleDeselect(eventData);
             }
 #endif
         }
@@ -129,18 +120,18 @@ namespace AlicizaX.UI
         public void OnMove(AxisEventData eventData)
         {
 #if UX_NAVIGATION
-            if ((flags & ItemInteractionFlags.Move) != 0)
+            if ((activeInteractionFlags & ItemInteractionFlags.Move) != 0)
             {
-                host?.HandleMove(eventData);
+                interactionHost?.HandleMove(eventData);
             }
 #endif
         }
 
         public void OnBeginDrag(PointerEventData eventData)
         {
-            if ((flags & ItemInteractionFlags.BeginDrag) != 0)
+            if ((activeInteractionFlags & ItemInteractionFlags.BeginDrag) != 0)
             {
-                host?.HandleBeginDrag(eventData);
+                interactionHost?.HandleBeginDrag(eventData);
                 return;
             }
 
@@ -149,9 +140,9 @@ namespace AlicizaX.UI
 
         public void OnDrag(PointerEventData eventData)
         {
-            if ((flags & ItemInteractionFlags.Drag) != 0)
+            if ((activeInteractionFlags & ItemInteractionFlags.Drag) != 0)
             {
-                host?.HandleDrag(eventData);
+                interactionHost?.HandleDrag(eventData);
                 return;
             }
 
@@ -160,9 +151,9 @@ namespace AlicizaX.UI
 
         public void OnEndDrag(PointerEventData eventData)
         {
-            if ((flags & ItemInteractionFlags.EndDrag) != 0)
+            if ((activeInteractionFlags & ItemInteractionFlags.EndDrag) != 0)
             {
-                host?.HandleEndDrag(eventData);
+                interactionHost?.HandleEndDrag(eventData);
                 return;
             }
 
@@ -172,9 +163,9 @@ namespace AlicizaX.UI
         public void OnSubmit(BaseEventData eventData)
         {
 #if UX_NAVIGATION
-            if ((flags & ItemInteractionFlags.Submit) != 0)
+            if ((activeInteractionFlags & ItemInteractionFlags.Submit) != 0)
             {
-                host?.HandleSubmit(eventData);
+                interactionHost?.HandleSubmit(eventData);
             }
 #endif
         }
@@ -182,9 +173,9 @@ namespace AlicizaX.UI
         public void OnCancel(BaseEventData eventData)
         {
 #if UX_NAVIGATION
-            if ((flags & ItemInteractionFlags.Cancel) != 0)
+            if ((activeInteractionFlags & ItemInteractionFlags.Cancel) != 0)
             {
-                host?.HandleCancel(eventData);
+                interactionHost?.HandleCancel(eventData);
             }
 #endif
         }
@@ -210,28 +201,35 @@ namespace AlicizaX.UI
 
 #if UX_NAVIGATION
             ownedSelectable = GetComponent<RecyclerItemSelectable>();
-            if (ownedSelectable == null)
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+            if (ownedSelectable == null && RequiresSelection(activeInteractionFlags) && !missingSelectableLogged)
             {
-                ownedSelectable = gameObject.AddComponent<RecyclerItemSelectable>();
+                missingSelectableLogged = true;
+                UnityEngine.Debug.LogError(ZString.Format("RecyclerItemSelectable is missing on '{0}'. Add it in prefab/editor setup.", GetHierarchyPath(transform)));
             }
-
+#endif
             focusAnchor = ownedSelectable;
 #endif
         }
 
-        private bool TryGetFocusableSelectable(out Selectable selectable)
+        private bool TryGetInteractionFocusTarget(out GameObject target)
         {
+            target = null;
             EnsureFocusAnchor();
             if (IsSelectableFocusable(focusAnchor))
             {
-                selectable = focusAnchor;
-                return true;
+                target = focusAnchor.gameObject;
+                return target != null;
             }
 
-            Selectable[] selectables = GetComponentsInChildren<Selectable>(true);
-            for (int i = 0; i < selectables.Length; i++)
+            if (selectableCache.Count == 0)
             {
-                Selectable candidate = selectables[i];
+                RefreshInteractionCache();
+            }
+
+            for (int i = 0; i < selectableCache.Count; i++)
+            {
+                Selectable candidate = selectableCache[i];
                 if (candidate == focusAnchor)
                 {
                     continue;
@@ -245,22 +243,14 @@ namespace AlicizaX.UI
 #endif
                 if (IsSelectableFocusable(candidate))
                 {
-                    selectable = candidate;
-                    return true;
+                    target = candidate.gameObject;
+                    return target != null;
                 }
             }
 
-            selectable = null;
             return false;
         }
 
-        private static bool IsSelectableFocusable(Selectable selectable)
-        {
-            return selectable != null &&
-                   selectable.IsActive() &&
-                   selectable.IsInteractable();
-        }
-
         private static bool RequiresSelection(ItemInteractionFlags interactionFlags)
         {
 #if !UX_NAVIGATION
@@ -277,6 +267,26 @@ namespace AlicizaX.UI
 #endif
         }
 
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+        private static string GetHierarchyPath(Transform target)
+        {
+            if (target == null)
+            {
+                return "<null>";
+            }
+
+            string path = target.name;
+            Transform parent = target.parent;
+            while (parent != null)
+            {
+                path = ZString.Format("{0}/{1}", parent.name, path);
+                parent = parent.parent;
+            }
+
+            return path;
+        }
+#endif
+
         [System.Diagnostics.Conditional("INPUTSYSTEM_SUPPORT")]
         private void InvalidateNavigationScope()
         {

Runtime/RecyclerView/ViewHolder/ViewHolder.Interaction.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: ac4f0b81367e72b408b7d4a0148d39c3
+guid: 6114223b5ccfeaa499630f5e4b71120c
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Runtime/RecyclerView/ViewHolder/ViewHolder.cs

@@ -1,13 +1,19 @@
-using System;
+using System.Collections.Generic;
 using UnityEngine;
+using UnityEngine.EventSystems;
+using UnityEngine.UI;
 
 namespace AlicizaX.UI
 {
-    public abstract class ViewHolder : MonoBehaviour
+    public abstract partial class ViewHolder : MonoBehaviour
     {
         private RectTransform rectTransform;
+        private Selectable focusAnchor;
+        private readonly List<Selectable> selectableCache = new();
+        private bool interactionCacheReady;
 
-        internal event Action<ViewHolder> Destroyed;
+        internal IItemRender CachedItemRender;
+        internal string CachedItemRenderViewName;
 
         public RectTransform RectTransform
         {
@@ -40,6 +46,57 @@ namespace AlicizaX.UI
             return BindingVersion;
         }
 
+        internal void RefreshInteractionCache()
+        {
+            if (interactionCacheReady)
+            {
+                return;
+            }
+
+            focusAnchor = GetComponent<Selectable>();
+            selectableCache.Clear();
+            GetComponentsInChildren(true, selectableCache);
+            interactionCacheReady = true;
+        }
+
+        internal bool TryGetFocusTarget(out GameObject target)
+        {
+            if (TryGetInteractionFocusTarget(out target))
+            {
+                return true;
+            }
+
+            Selectable selectable = IsSelectableFocusable(focusAnchor) ? focusAnchor : null;
+            if (selectable == null)
+            {
+                for (int i = 0; i < selectableCache.Count; i++)
+                {
+                    if (IsSelectableFocusable(selectableCache[i]))
+                    {
+                        selectable = selectableCache[i];
+                        break;
+                    }
+                }
+            }
+
+            if (selectable != null)
+            {
+                target = selectable.gameObject;
+                return true;
+            }
+
+            if (ExecuteEvents.CanHandleEvent<IMoveHandler>(gameObject) ||
+                ExecuteEvents.CanHandleEvent<ISelectHandler>(gameObject) ||
+                ExecuteEvents.CanHandleEvent<ISubmitHandler>(gameObject))
+            {
+                target = gameObject;
+                return true;
+            }
+
+            target = null;
+            return false;
+        }
+
         protected internal virtual void OnRecycled()
         {
             AdvanceBindingVersion();
@@ -49,10 +106,12 @@ namespace AlicizaX.UI
             RecyclerView = null;
         }
 
-        protected virtual void OnDestroy()
+        private static bool IsSelectableFocusable(Selectable selectable)
         {
-            Destroyed?.Invoke(this);
-            Destroyed = null;
+            return selectable != null &&
+                   selectable.IsActive() &&
+                   selectable.IsInteractable();
         }
+
     }
 }

Runtime/RecyclerView/ViewProvider/MixedViewProvider.cs

@@ -1,19 +1,46 @@
 using System;
 using System.Collections.Generic;
+using Cysharp.Text;
 
 namespace AlicizaX.UI
 {
     public class MixedViewProvider : ViewProvider
     {
         private readonly MixedObjectPool<ViewHolder> objectPool;
+        private readonly Dictionary<string, int> templateIdsByName = new(StringComparer.Ordinal);
         private readonly Dictionary<string, ViewHolder> templatesByName = new(StringComparer.Ordinal);
-        private readonly Dictionary<string, int> warmCounts = new(StringComparer.Ordinal);
+        private readonly ViewHolder[] cachedTemplates;
+        private readonly string[] templateNames;
+        private readonly int[] warmCountsByType;
 
-        public override string PoolStats =>
-            $"hits={objectPool.HitCount}, misses={objectPool.MissCount}, destroys={objectPool.DestroyCount}";
+        public override string PoolStats
+        {
+            get
+            {
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+                return ZString.Format("hits={0}, misses={1}, destroys={2}", objectPool.HitCount, objectPool.MissCount, objectPool.DestroyCount);
+#else
+                return string.Empty;
+#endif
+            }
+        }
 
         public MixedViewProvider(RecyclerView recyclerView, ViewHolder[] templates) : base(recyclerView, templates)
         {
+            int count = 0;
+            for (int i = 0; i < templates.Length; i++)
+            {
+                if (templates[i] != null)
+                {
+                    count++;
+                }
+            }
+
+            cachedTemplates = new ViewHolder[count];
+            templateNames = new string[count];
+            warmCountsByType = new int[count];
+
+            int typeId = 0;
             for (int i = 0; i < templates.Length; i++)
             {
                 ViewHolder template = templates[i];
@@ -22,7 +49,12 @@ namespace AlicizaX.UI
                     continue;
                 }
 
-                templatesByName[template.GetType().Name] = template;
+                string templateName = template.GetType().Name;
+                templateIdsByName[templateName] = typeId;
+                templatesByName[templateName] = template;
+                cachedTemplates[typeId] = template;
+                templateNames[typeId] = templateName;
+                typeId++;
             }
 
             UnityMixedComponentFactory<ViewHolder> factory = new(templatesByName, recyclerView.Content);
@@ -31,31 +63,17 @@ namespace AlicizaX.UI
 
         public override ViewHolder GetTemplate(string viewName)
         {
-            if (templates == null || templates.Length == 0)
-            {
-                throw new NullReferenceException("ViewProvider templates can not null or empty.");
-            }
-
             if (!templatesByName.TryGetValue(viewName, out ViewHolder template))
             {
-                throw new KeyNotFoundException($"ViewProvider template '{viewName}' was not found.");
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+                UnityEngine.Debug.LogError("ViewProvider template was not found.");
+#endif
+                return null;
             }
 
             return template;
         }
 
-        public override ViewHolder[] GetTemplates()
-        {
-            if (templates == null || templates.Length == 0)
-            {
-                throw new NullReferenceException("ViewProvider templates can not null or empty.");
-            }
-
-            ViewHolder[] values = new ViewHolder[templatesByName.Count];
-            templatesByName.Values.CopyTo(values, 0);
-            return values;
-        }
-
         public override ViewHolder Allocate(string viewName)
         {
             var viewHolder = objectPool.Allocate(viewName);
@@ -72,7 +90,7 @@ namespace AlicizaX.UI
         {
             Clear();
             (Adapter as IItemRenderCacheOwner)?.ReleaseAllItemRenders();
-            objectPool.Dispose();
+            objectPool.ClearInactive();
         }
 
         public override void PreparePool()
@@ -83,28 +101,36 @@ namespace AlicizaX.UI
                 return;
             }
 
+            PrepareBucketPool(warmCount);
+
             int itemCount = GetItemCount();
             int start = Math.Max(0, LayoutManager.GetStartIndex());
             int end = Math.Min(itemCount - 1, start + warmCount - 1);
 
-            warmCounts.Clear();
+            Array.Clear(warmCountsByType, 0, warmCountsByType.Length);
             for (int index = start; index <= end; index++)
             {
                 string viewName = Adapter.GetViewName(index);
-                if (string.IsNullOrEmpty(viewName))
+                if (string.IsNullOrEmpty(viewName) || !templateIdsByName.TryGetValue(viewName, out int typeId))
                 {
                     continue;
                 }
 
-                warmCounts.TryGetValue(viewName, out int count);
-                warmCounts[viewName] = count + 1;
+                warmCountsByType[typeId]++;
             }
 
-            foreach (var pair in warmCounts)
+            for (int typeId = 0; typeId < warmCountsByType.Length; typeId++)
             {
-                int targetCount = pair.Value + Math.Max(1, LayoutManager.Unit);
-                objectPool.EnsureCapacity(pair.Key, targetCount);
-                objectPool.Warm(pair.Key, targetCount);
+                int count = warmCountsByType[typeId];
+                if (count <= 0)
+                {
+                    continue;
+                }
+
+                string typeName = templateNames[typeId];
+                int targetCount = count + Math.Max(1, LayoutManager.Unit);
+                objectPool.EnsureCapacity(typeName, targetCount);
+                objectPool.Warm(typeName, targetCount);
             }
         }
     }

Runtime/RecyclerView/ViewProvider/SimpleViewProvider.cs

@@ -1,13 +1,29 @@
-using System;
-
 namespace AlicizaX.UI
 {
+    using Cysharp.Text;
+
     public sealed class SimpleViewProvider : ViewProvider
     {
         private readonly ObjectPool<ViewHolder> objectPool;
 
-        public override string PoolStats =>
-            $"hits={objectPool.HitCount}, misses={objectPool.MissCount}, destroys={objectPool.DestroyCount}, active={objectPool.ActiveCount}, inactive={objectPool.InactiveCount}, peakActive={objectPool.PeakActive}, capacity={objectPool.MaxSize}";
+        public override string PoolStats
+        {
+            get
+            {
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+                return ZString.Format("hits={0}, misses={1}, destroys={2}, active={3}, inactive={4}, peakActive={5}, capacity={6}",
+                    objectPool.HitCount,
+                    objectPool.MissCount,
+                    objectPool.DestroyCount,
+                    objectPool.ActiveCount,
+                    objectPool.InactiveCount,
+                    objectPool.PeakActive,
+                    objectPool.MaxSize);
+#else
+                return string.Empty;
+#endif
+            }
+        }
 
         public SimpleViewProvider(RecyclerView recyclerView, ViewHolder[] templates) : base(recyclerView, templates)
         {
@@ -17,20 +33,7 @@ namespace AlicizaX.UI
 
         public override ViewHolder GetTemplate(string viewName = "")
         {
-            if (templates == null || templates.Length == 0)
-            {
-                throw new NullReferenceException("ViewProvider templates can not null or empty.");
-            }
-            return templates[0];
-        }
-
-        public override ViewHolder[] GetTemplates()
-        {
-            if (templates == null || templates.Length == 0)
-            {
-                throw new NullReferenceException("ViewProvider templates can not null or empty.");
-            }
-            return templates;
+            return templates != null && templates.Length > 0 ? templates[0] : null;
         }
 
         public override ViewHolder Allocate(string viewName)
@@ -49,7 +52,7 @@ namespace AlicizaX.UI
         {
             Clear();
             (Adapter as IItemRenderCacheOwner)?.ReleaseAllItemRenders();
-            objectPool.Dispose();
+            objectPool.ClearInactive();
         }
 
         public override void PreparePool()
@@ -60,6 +63,8 @@ namespace AlicizaX.UI
                 return;
             }
 
+            PrepareBucketPool(warmCount);
+
             objectPool.EnsureCapacity(warmCount);
             objectPool.Warm(warmCount);
         }

Runtime/RecyclerView/ViewProvider/ViewProvider.cs

@@ -6,16 +6,26 @@ namespace AlicizaX.UI
 {
     public abstract class ViewProvider
     {
-        private readonly List<ViewHolder> viewHolders = new();
+        private ViewHolder[] visibleHolders = new ViewHolder[8];
+        private ViewHolder[] removeBuffer = new ViewHolder[4];
+        private ViewHolderBucket[] bucketPool = new ViewHolderBucket[8];
+        private int visibleHead;
+        private int visibleCount;
+        private int bucketPoolCount;
         private readonly Dictionary<int, ViewHolder> viewHoldersByIndex = new();
-        private readonly Dictionary<int, List<ViewHolder>> viewHoldersByDataIndex = new();
+        private readonly Dictionary<int, ViewHolderBucket> viewHoldersByDataIndex = new();
         private readonly Dictionary<int, int> viewHolderPositions = new();
 
         public IAdapter Adapter { get; set; }
 
         public LayoutManager LayoutManager { get; set; }
 
-        public IReadOnlyList<ViewHolder> ViewHolders => viewHolders;
+        public int VisibleCount => visibleCount;
+
+        public ViewHolder GetVisibleViewHolder(int index)
+        {
+            return index >= 0 && index < visibleCount ? visibleHolders[GetVisibleSlot(index)] : null;
+        }
 
         public abstract string PoolStats { get; }
 
@@ -30,8 +40,6 @@ namespace AlicizaX.UI
 
         public abstract ViewHolder GetTemplate(string viewName);
 
-        public abstract ViewHolder[] GetTemplates();
-
         public abstract ViewHolder Allocate(string viewName);
 
         public abstract void Free(string viewName, ViewHolder viewHolder);
@@ -52,8 +60,19 @@ namespace AlicizaX.UI
                 viewHolder.Index = i;
                 viewHolder.DataIndex = i;
                 viewHolder.RecyclerView = recyclerView;
-                viewHolders.Add(viewHolder);
-                RegisterViewHolder(viewHolder);
+                (Adapter as IItemRenderPrewarmer)?.PrewarmItemRender(viewHolder, viewName);
+                if (!AddVisibleHolder(viewHolder))
+                {
+                    Free(viewName, viewHolder);
+                    continue;
+                }
+
+                if (!RegisterViewHolder(viewHolder))
+                {
+                    RemoveVisibleHolder(viewHolder);
+                    Free(viewName, viewHolder);
+                    continue;
+                }
 
                 LayoutManager.Layout(viewHolder, i);
                 Adapter.OnBindViewHolder(viewHolder, i);
@@ -62,19 +81,37 @@ namespace AlicizaX.UI
 
         public void RemoveViewHolder(int index)
         {
-            for (int i = index; i < index + LayoutManager.Unit; i++)
+            int removeCount = 0;
+            int end = index + LayoutManager.Unit;
+            EnsureRemoveBufferCapacity(LayoutManager.Unit);
+            for (int i = index; i < end; i++)
             {
-                if (i > Adapter.GetItemCount() - 1) break;
+                if (i > Adapter.GetItemCount() - 1)
+                {
+                    break;
+                }
 
                 int viewHolderIndex = GetViewHolderIndex(i);
+                if (viewHolderIndex < 0 || viewHolderIndex >= visibleCount)
+                {
+                    continue;
+                }
 
-                if (viewHolderIndex < 0 || viewHolderIndex >= viewHolders.Count) return;
+                removeBuffer[removeCount++] = visibleHolders[GetVisibleSlot(viewHolderIndex)];
+            }
+
+            for (int i = 0; i < removeCount; i++)
+            {
+                ViewHolder viewHolder = removeBuffer[i];
+                removeBuffer[i] = null;
+                if (viewHolder == null)
+                {
+                    continue;
+                }
 
-                var viewHolder = viewHolders[viewHolderIndex];
                 string viewName = viewHolder.Name;
-                viewHolders.RemoveAt(viewHolderIndex);
+                RemoveVisibleHolder(viewHolder);
                 UnregisterViewHolder(viewHolder);
-                RebuildViewHolderPositions(viewHolderIndex);
                 Adapter?.OnRecycleViewHolder(viewHolder);
                 viewHolder.OnRecycled();
                 ClearSelectedState(viewHolder);
@@ -91,22 +128,14 @@ namespace AlicizaX.UI
 
         public ViewHolder GetViewHolderByDataIndex(int dataIndex)
         {
-            return viewHoldersByDataIndex.TryGetValue(dataIndex, out List<ViewHolder> holders) &&
-                   holders is { Count: > 0 }
-                ? holders[0]
+            return viewHoldersByDataIndex.TryGetValue(dataIndex, out ViewHolderBucket bucket) && bucket.Count > 0
+                ? bucket[0]
                 : null;
         }
 
-        public bool TryGetViewHoldersByDataIndex(int dataIndex, out IReadOnlyList<ViewHolder> holders)
+        public bool TryGetViewHolderBucket(int dataIndex, out ViewHolderBucket bucket)
         {
-            if (viewHoldersByDataIndex.TryGetValue(dataIndex, out List<ViewHolder> list) && list.Count > 0)
-            {
-                holders = list;
-                return true;
-            }
-
-            holders = null;
-            return false;
+            return viewHoldersByDataIndex.TryGetValue(dataIndex, out bucket) && bucket.Count > 0;
         }
 
         public int GetViewHolderIndex(int index)
@@ -118,8 +147,14 @@ namespace AlicizaX.UI
 
         public void Clear()
         {
-            foreach (var viewHolder in viewHolders)
+            for (int i = 0; i < visibleCount; i++)
             {
+                ViewHolder viewHolder = visibleHolders[GetVisibleSlot(i)];
+                if (viewHolder == null)
+                {
+                    continue;
+                }
+
                 string viewName = viewHolder.Name;
                 Adapter?.OnRecycleViewHolder(viewHolder);
                 UnregisterViewHolder(viewHolder);
@@ -128,8 +163,14 @@ namespace AlicizaX.UI
                 Free(viewName, viewHolder);
             }
 
-            viewHolders.Clear();
+            System.Array.Clear(visibleHolders, 0, visibleHolders.Length);
+            visibleHead = 0;
+            visibleCount = 0;
             viewHoldersByIndex.Clear();
+            foreach (var pair in viewHoldersByDataIndex)
+            {
+                ReleaseBucket(pair.Value);
+            }
             viewHoldersByDataIndex.Clear();
             viewHolderPositions.Clear();
         }
@@ -161,27 +202,47 @@ namespace AlicizaX.UI
             int start = Mathf.Max(0, LayoutManager.GetStartIndex());
             int end = Mathf.Max(start, LayoutManager.GetEndIndex());
             int visibleCount = end - start + 1;
-            int bufferCount = Mathf.Max(1, LayoutManager.Unit);
+            int unit = Mathf.Max(1, LayoutManager.Unit);
+            int bufferCount = unit * 2;
             return Mathf.Min(itemCount, visibleCount + bufferCount);
         }
 
-        private void RegisterViewHolder(ViewHolder viewHolder)
+        protected void PrepareVisibleStorage(int warmCount)
+        {
+            int capacity = Mathf.Max(Mathf.Max(1, LayoutManager != null ? LayoutManager.Unit : 1), warmCount);
+            if (visibleHolders.Length < capacity)
+            {
+                visibleHolders = new ViewHolder[capacity];
+            }
+
+            if (removeBuffer.Length < capacity)
+            {
+                removeBuffer = new ViewHolder[capacity];
+            }
+        }
+
+        private bool RegisterViewHolder(ViewHolder viewHolder)
         {
             if (viewHolder == null)
             {
-                return;
+                return false;
+            }
+
+            if (!viewHoldersByDataIndex.TryGetValue(viewHolder.DataIndex, out ViewHolderBucket bucket))
+            {
+                bucket = AllocateBucket();
+                if (bucket == null)
+                {
+                    return false;
+                }
+
+                viewHoldersByDataIndex[viewHolder.DataIndex] = bucket;
             }
 
             viewHoldersByIndex[viewHolder.Index] = viewHolder;
-            viewHolderPositions[viewHolder.Index] = viewHolders.Count - 1;
-
-            if (!viewHoldersByDataIndex.TryGetValue(viewHolder.DataIndex, out List<ViewHolder> holders))
-            {
-                holders = new List<ViewHolder>(1);
-                viewHoldersByDataIndex[viewHolder.DataIndex] = holders;
-            }
-
-            holders.Add(viewHolder);
+            viewHolderPositions[viewHolder.Index] = GetVisibleSlot(visibleCount - 1);
+            bucket.Add(viewHolder);
+            return true;
         }
 
         private void UnregisterViewHolder(ViewHolder viewHolder)
@@ -194,35 +255,72 @@ namespace AlicizaX.UI
             viewHoldersByIndex.Remove(viewHolder.Index);
             viewHolderPositions.Remove(viewHolder.Index);
 
-            if (!viewHoldersByDataIndex.TryGetValue(viewHolder.DataIndex, out List<ViewHolder> holders))
+            if (!viewHoldersByDataIndex.TryGetValue(viewHolder.DataIndex, out ViewHolderBucket bucket))
             {
                 return;
             }
 
-            // 用末尾元素覆盖目标项再移除末位，避免 List.Remove 的线性搜索+内存搬移。
-            int idx = holders.LastIndexOf(viewHolder);
-            if (idx >= 0)
-            {
-                holders[idx] = holders[holders.Count - 1];
-                holders.RemoveAt(holders.Count - 1);
-            }
-
-            if (holders.Count == 0)
+            bucket.Remove(viewHolder);
+            if (bucket.Count == 0)
             {
                 viewHoldersByDataIndex.Remove(viewHolder.DataIndex);
+                ReleaseBucket(bucket);
             }
         }
 
-        private void RebuildViewHolderPositions(int startIndex)
+        private bool AddVisibleHolder(ViewHolder viewHolder)
         {
-            for (int i = startIndex; i < viewHolders.Count; i++)
+            if (visibleCount == visibleHolders.Length)
             {
-                ViewHolder holder = viewHolders[i];
-                if (holder != null)
-                {
-                    viewHolderPositions[holder.Index] = i;
-                }
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+                UnityEngine.Debug.LogError("RecyclerView visible holder capacity exceeded. Increase warm count.");
+#endif
+                return false;
             }
+
+            visibleHolders[GetVisibleSlot(visibleCount)] = viewHolder;
+            visibleCount++;
+            return true;
+        }
+
+        private void RemoveVisibleHolder(ViewHolder viewHolder)
+        {
+            if (!viewHolderPositions.TryGetValue(viewHolder.Index, out int slot))
+            {
+                return;
+            }
+
+            int last = GetVisibleSlot(visibleCount - 1);
+            ViewHolder lastHolder = visibleHolders[last];
+            visibleHolders[slot] = lastHolder;
+            visibleHolders[last] = null;
+            visibleCount--;
+            if (visibleCount == 0)
+            {
+                visibleHead = 0;
+            }
+
+            if (lastHolder != null && lastHolder != viewHolder)
+            {
+                viewHolderPositions[lastHolder.Index] = slot;
+            }
+        }
+
+        private int GetVisibleSlot(int index)
+        {
+            return (visibleHead + index) % visibleHolders.Length;
+        }
+
+        private void EnsureRemoveBufferCapacity(int required)
+        {
+            if (required <= removeBuffer.Length)
+            {
+                return;
+            }
+
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+            UnityEngine.Debug.LogError("RecyclerView remove buffer capacity exceeded. Increase warm count.");
+#endif
         }
 
         private static void ClearSelectedState(ViewHolder viewHolder)
@@ -244,5 +342,132 @@ namespace AlicizaX.UI
                 eventSystem.SetSelectedGameObject(null);
             }
         }
+
+
+        protected void PrepareBucketPool(int count)
+        {
+            PrepareVisibleStorage(count);
+            EnsureBucketPoolCapacity(count);
+            int capacity = GetBucketCapacity();
+            while (bucketPoolCount < count)
+            {
+                bucketPool[bucketPoolCount++] = new ViewHolderBucket(capacity);
+            }
+        }
+
+        private ViewHolderBucket AllocateBucket()
+        {
+            if (bucketPoolCount > 0)
+            {
+                ViewHolderBucket bucket = bucketPool[--bucketPoolCount];
+                bucketPool[bucketPoolCount] = null;
+                bucket.Clear();
+                return bucket;
+            }
+
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+            UnityEngine.Debug.LogError("ViewHolderBucket pool is empty. Increase RecyclerView warm count.");
+#endif
+            return null;
+        }
+
+        private void ReleaseBucket(ViewHolderBucket bucket)
+        {
+            if (bucket == null)
+            {
+                return;
+            }
+
+            bucket.Clear();
+            EnsureBucketPoolCapacity(bucketPoolCount + 1);
+            bucketPool[bucketPoolCount++] = bucket;
+        }
+
+        private int GetBucketCapacity()
+        {
+            return Mathf.Max(4, LayoutManager != null ? LayoutManager.Unit + 1 : 4);
+        }
+
+        private void EnsureBucketPoolCapacity(int required)
+        {
+            if (required <= bucketPool.Length)
+            {
+                return;
+            }
+
+            int capacity = bucketPool.Length;
+            while (capacity < required)
+            {
+                capacity <<= 1;
+            }
+
+            ViewHolderBucket[] next = new ViewHolderBucket[capacity];
+            System.Array.Copy(bucketPool, next, bucketPoolCount);
+            bucketPool = next;
+        }
+
+        public sealed class ViewHolderBucket
+        {
+            private readonly ViewHolder[] holders;
+
+            public ViewHolderBucket(int capacity)
+            {
+                holders = new ViewHolder[capacity];
+            }
+
+            public int Count { get; private set; }
+
+            public ViewHolder this[int index]
+            {
+                get
+                {
+                    if (index < 0 || index >= Count)
+                    {
+                        return null;
+                    }
+
+                    return holders[index];
+                }
+            }
+
+            public void Add(ViewHolder holder)
+            {
+                if (Count == holders.Length)
+                {
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+                    UnityEngine.Debug.LogError("ViewHolderBucket capacity exceeded.");
+#endif
+                    return;
+                }
+
+                holders[Count++] = holder;
+            }
+
+            public void Remove(ViewHolder holder)
+            {
+                for (int i = 0; i < Count; i++)
+                {
+                    if (holders[i] != holder)
+                    {
+                        continue;
+                    }
+
+                    Count--;
+                    holders[i] = holders[Count];
+                    holders[Count] = null;
+                    return;
+                }
+            }
+
+            public void Clear()
+            {
+                for (int i = 0; i < Count; i++)
+                {
+                    holders[i] = null;
+                }
+
+                Count = 0;
+            }
+        }
     }
 }

Runtime/UXComponent/Navigation/UXInputModeService.cs

@@ -1,4 +1,4 @@
-#if INPUTSYSTEM_SUPPORT && UX_NAVIGATION
+#if INPUTSYSTEM_SUPPORT && UX_NAVIGATION
 using System;
 using UnityEngine.InputSystem;
 using UnityEngine.InputSystem.Controls;
@@ -10,6 +10,30 @@ namespace UnityEngine.UI
         private const float StickThresholdSqr = 0.04f;
         private const float AxisThreshold = 0.2f;
 
+        private const string PointerActionName = "UXPointerInput";
+        private const string KeyboardActionName = "UXKeyboardInput";
+        private const string GamepadActionName = "UXGamepadInput";
+        private const string TouchActionName = "UXTouchInput";
+        private const string MouseDeltaBinding = "<Mouse>/delta";
+        private const string MouseScrollBinding = "<Mouse>/scroll";
+        private const string MouseLeftButtonBinding = "<Mouse>/leftButton";
+        private const string MouseRightButtonBinding = "<Mouse>/rightButton";
+        private const string MouseMiddleButtonBinding = "<Mouse>/middleButton";
+        private const string KeyboardAnyKeyBinding = "<Keyboard>/anyKey";
+        private const string GamepadButtonSouthBinding = "<Gamepad>/buttonSouth";
+        private const string GamepadButtonNorthBinding = "<Gamepad>/buttonNorth";
+        private const string GamepadButtonEastBinding = "<Gamepad>/buttonEast";
+        private const string GamepadButtonWestBinding = "<Gamepad>/buttonWest";
+        private const string GamepadStartButtonBinding = "<Gamepad>/startButton";
+        private const string GamepadSelectButtonBinding = "<Gamepad>/selectButton";
+        private const string GamepadLeftShoulderBinding = "<Gamepad>/leftShoulder";
+        private const string GamepadRightShoulderBinding = "<Gamepad>/rightShoulder";
+        private const string GamepadDpadBinding = "<Gamepad>/dpad";
+        private const string GamepadLeftStickBinding = "<Gamepad>/leftStick";
+        private const string GamepadRightStickBinding = "<Gamepad>/rightStick";
+        private const string TouchPressBinding = "<Touchscreen>/primaryTouch/press";
+        private const string TouchDeltaBinding = "<Touchscreen>/primaryTouch/delta";
+
         private static UXInputModeService _instance;
 
         private InputAction _pointerAction;
@@ -21,12 +45,6 @@ namespace UnityEngine.UI
 
         public static event Action<UXInputMode> OnModeChanged;
 
-        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterSceneLoad)]
-        private static void Bootstrap()
-        {
-            EnsureInstance();
-        }
-
         internal static UXInputModeService EnsureInstance()
         {
             if (_instance != null)
@@ -81,35 +99,35 @@ namespace UnityEngine.UI
                 return;
             }
 
-            _pointerAction = new InputAction("UXPointerInput", InputActionType.PassThrough);
-            _pointerAction.AddBinding("<Mouse>/delta");
-            _pointerAction.AddBinding("<Mouse>/scroll");
-            _pointerAction.AddBinding("<Mouse>/leftButton");
-            _pointerAction.AddBinding("<Mouse>/rightButton");
-            _pointerAction.AddBinding("<Mouse>/middleButton");
+            _pointerAction = new InputAction(PointerActionName, InputActionType.PassThrough);
+            _pointerAction.AddBinding(MouseDeltaBinding);
+            _pointerAction.AddBinding(MouseScrollBinding);
+            _pointerAction.AddBinding(MouseLeftButtonBinding);
+            _pointerAction.AddBinding(MouseRightButtonBinding);
+            _pointerAction.AddBinding(MouseMiddleButtonBinding);
             _pointerAction.performed += OnPointerInput;
 
-            _keyboardAction = new InputAction("UXKeyboardInput", InputActionType.PassThrough);
-            _keyboardAction.AddBinding("<Keyboard>/anyKey");
+            _keyboardAction = new InputAction(KeyboardActionName, InputActionType.PassThrough);
+            _keyboardAction.AddBinding(KeyboardAnyKeyBinding);
             _keyboardAction.performed += OnKeyboardInput;
 
-            _gamepadAction = new InputAction("UXGamepadInput", InputActionType.PassThrough);
-            _gamepadAction.AddBinding("<Gamepad>/buttonSouth");
-            _gamepadAction.AddBinding("<Gamepad>/buttonNorth");
-            _gamepadAction.AddBinding("<Gamepad>/buttonEast");
-            _gamepadAction.AddBinding("<Gamepad>/buttonWest");
-            _gamepadAction.AddBinding("<Gamepad>/startButton");
-            _gamepadAction.AddBinding("<Gamepad>/selectButton");
-            _gamepadAction.AddBinding("<Gamepad>/leftShoulder");
-            _gamepadAction.AddBinding("<Gamepad>/rightShoulder");
-            _gamepadAction.AddBinding("<Gamepad>/dpad");
-            _gamepadAction.AddBinding("<Gamepad>/leftStick");
-            _gamepadAction.AddBinding("<Gamepad>/rightStick");
+            _gamepadAction = new InputAction(GamepadActionName, InputActionType.PassThrough);
+            _gamepadAction.AddBinding(GamepadButtonSouthBinding);
+            _gamepadAction.AddBinding(GamepadButtonNorthBinding);
+            _gamepadAction.AddBinding(GamepadButtonEastBinding);
+            _gamepadAction.AddBinding(GamepadButtonWestBinding);
+            _gamepadAction.AddBinding(GamepadStartButtonBinding);
+            _gamepadAction.AddBinding(GamepadSelectButtonBinding);
+            _gamepadAction.AddBinding(GamepadLeftShoulderBinding);
+            _gamepadAction.AddBinding(GamepadRightShoulderBinding);
+            _gamepadAction.AddBinding(GamepadDpadBinding);
+            _gamepadAction.AddBinding(GamepadLeftStickBinding);
+            _gamepadAction.AddBinding(GamepadRightStickBinding);
             _gamepadAction.performed += OnGamepadInput;
 
-            _touchAction = new InputAction("UXTouchInput", InputActionType.PassThrough);
-            _touchAction.AddBinding("<Touchscreen>/primaryTouch/press");
-            _touchAction.AddBinding("<Touchscreen>/primaryTouch/delta");
+            _touchAction = new InputAction(TouchActionName, InputActionType.PassThrough);
+            _touchAction.AddBinding(TouchPressBinding);
+            _touchAction.AddBinding(TouchDeltaBinding);
             _touchAction.performed += OnTouchInput;
         }
 
@@ -222,7 +240,6 @@ namespace UnityEngine.UI
 
         internal static void SetMode(UXInputMode mode)
         {
-            EnsureInstance();
             if (CurrentMode == mode)
             {
                 return;
@@ -234,3 +251,4 @@ namespace UnityEngine.UI
     }
 }
 #endif
+

Runtime/UXComponent/Navigation/UXNavigationRuntime.cs

@@ -1,5 +1,4 @@
-#if INPUTSYSTEM_SUPPORT && UX_NAVIGATION
-using AlicizaX;
+#if INPUTSYSTEM_SUPPORT && UX_NAVIGATION
 using AlicizaX.UI.Runtime;
 using UnityEngine.EventSystems;
 
@@ -7,39 +6,28 @@ namespace UnityEngine.UI
 {
     public interface IUXNavigationCursorPolicy
     {
-        void OnInputModeChanged(UXInputMode mode, UXNavigationScope topScope);
+        void OnNavigationContextChanged(UXInputMode mode, UXNavigationScope previousTopScope, UXNavigationScope currentTopScope);
     }
 
     public sealed class UXNavigationRuntime : MonoBehaviour
     {
-        private const int InitialScopeCapacity = 64;
+        private const int ScopeCapacity = 128;
         private const int InvalidIndex = -1;
 
         private static UXNavigationRuntime _instance;
         private static IUXNavigationCursorPolicy _cursorPolicy;
 
-        private UXNavigationScope[] _scopes = new UXNavigationScope[InitialScopeCapacity];
-        private int[] _freeIndices = new int[InitialScopeCapacity];
-        private int _freeCount;
+        private readonly UXNavigationScope[] _scopes = new UXNavigationScope[ScopeCapacity];
         private int _scopeCount;
-        private int _scopeCapacityHighWater;
 
         private UXNavigationScope _topScope;
         private ulong _activationSerial;
         private bool _stateDirty = true;
         private bool _suppressionDirty = true;
-
-        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterSceneLoad)]
-        private static void Bootstrap()
-        {
-            if (!AppServices.TryGetApp<IUIService>(out var uiService) || uiService == null)
-            {
-                return;
-            }
-
-            EnsureInstance();
-            UXInputModeService.EnsureInstance();
-        }
+        private bool _isFlushingState;
+        private bool _isEnsuringSelection;
+        private bool _contextNotificationDirty;
+        private UXNavigationScope _pendingPreviousTopScope;
 
         internal static UXNavigationRuntime EnsureInstance()
         {
@@ -64,6 +52,10 @@ namespace UnityEngine.UI
         public static void SetCursorPolicy(IUXNavigationCursorPolicy cursorPolicy)
         {
             _cursorPolicy = cursorPolicy;
+            if (_instance != null)
+            {
+                _cursorPolicy?.OnNavigationContextChanged(UXInputModeService.CurrentMode, _instance._topScope, _instance._topScope);
+            }
         }
 
         public static void NotifySelection(GameObject selectedObject)
@@ -119,6 +111,7 @@ namespace UnityEngine.UI
             if (_instance == this)
             {
                 _instance = null;
+                _cursorPolicy = null;
             }
         }
 
@@ -129,25 +122,16 @@ namespace UnityEngine.UI
                 return;
             }
 
-            int index;
-            if (_freeCount > 0)
+            if (_scopeCount >= _scopes.Length)
             {
-                index = _freeIndices[--_freeCount];
-            }
-            else
-            {
-                if (_scopeCapacityHighWater >= _scopes.Length)
-                {
-                    ReportCapacityExceeded("UXNavigationRuntime scope capacity exceeded.");
-                    return;
-                }
-
-                index = _scopeCapacityHighWater++;
+                ReportCapacityExceeded();
+                return;
             }
 
+            int index = _scopeCount++;
             _scopes[index] = scope;
             scope.RuntimeIndex = index;
-            _scopeCount++;
+            UXInputModeService.EnsureInstance();
             MarkStateDirty();
         }
 
@@ -159,23 +143,30 @@ namespace UnityEngine.UI
             }
 
             int index = scope.RuntimeIndex;
-            if (index < 0 || index >= _scopes.Length || _scopes[index] != scope)
+            if (index < 0 || index >= _scopeCount || _scopes[index] != scope)
             {
                 return;
             }
 
             if (_topScope == scope)
             {
-                _topScope = null;
+                SetTopScope(null, false);
             }
 
             scope.IsAvailable = false;
             scope.WasAvailable = false;
             scope.SetNavigationSuppressed(false);
             scope.RuntimeIndex = InvalidIndex;
-            _scopes[index] = null;
-            _freeIndices[_freeCount++] = index;
-            _scopeCount--;
+
+            int last = --_scopeCount;
+            UXNavigationScope movedScope = _scopes[last];
+            _scopes[last] = null;
+            if (index != last)
+            {
+                _scopes[index] = movedScope;
+                movedScope.RuntimeIndex = index;
+            }
+
             MarkStateDirty();
         }
 
@@ -192,29 +183,28 @@ namespace UnityEngine.UI
 
         internal void InvalidateSkipCaches()
         {
-            for (int i = 0; i < _scopeCapacityHighWater; i++)
+            for (int i = 0; i < _scopeCount; i++)
             {
-                UXNavigationScope scope = _scopes[i];
-                if (scope != null)
-                {
-                    scope.InvalidateSkipCacheOnly();
-                }
+                _scopes[i].InvalidateSkipCacheOnly();
             }
 
             MarkStateDirty();
         }
 
-        private void FlushStateIfDirty()
+        private void FlushStateIfDirty(bool notifyContext)
         {
+            if (_isFlushingState)
+            {
+                return;
+            }
+
+            _isFlushingState = true;
+            UXNavigationScope previousTopScope = _topScope;
             if (_stateDirty)
             {
                 UXNavigationScope newTopScope = FindTopScope();
                 _stateDirty = false;
-                if (!ReferenceEquals(_topScope, newTopScope))
-                {
-                    _topScope = newTopScope;
-                    _suppressionDirty = true;
-                }
+                SetTopScope(newTopScope, false);
             }
 
             if (_suppressionDirty)
@@ -227,19 +217,24 @@ namespace UnityEngine.UI
             {
                 EnsureNavigationSelection();
             }
+
+            _isFlushingState = false;
+            if (notifyContext)
+            {
+                NotifyContextIfChanged(previousTopScope, _topScope);
+            }
+            else if (!ReferenceEquals(previousTopScope, _topScope))
+            {
+                QueueContextNotification(previousTopScope);
+            }
         }
 
         private UXNavigationScope FindTopScope()
         {
             UXNavigationScope bestScope = null;
-            for (int i = 0; i < _scopeCapacityHighWater; i++)
+            for (int i = 0; i < _scopeCount; i++)
             {
                 UXNavigationScope scope = _scopes[i];
-                if (scope == null)
-                {
-                    continue;
-                }
-
                 bool available = IsScopeAvailable(scope);
                 scope.IsAvailable = available;
                 if (scope.WasAvailable != available)
@@ -278,14 +273,9 @@ namespace UnityEngine.UI
 
         private void ApplyScopeSuppression()
         {
-            for (int i = 0; i < _scopeCapacityHighWater; i++)
+            for (int i = 0; i < _scopeCount; i++)
             {
                 UXNavigationScope scope = _scopes[i];
-                if (scope == null)
-                {
-                    continue;
-                }
-
                 bool suppress = scope.IsAvailable
                                 && _topScope != null
                                 && scope != _topScope
@@ -311,7 +301,9 @@ namespace UnityEngine.UI
             }
 
             Selectable preferred = _topScope.GetPreferredSelectable();
+            _isEnsuringSelection = true;
             eventSystem.SetSelectedGameObject(preferred != null ? preferred.gameObject : null);
+            _isEnsuringSelection = false;
             GameObject selectedObject = eventSystem.currentSelectedGameObject;
             if (selectedObject != null)
             {
@@ -321,9 +313,9 @@ namespace UnityEngine.UI
 
         private void RecordSelection(GameObject selectedObject)
         {
-            if (_stateDirty || _suppressionDirty)
+            if (!_isEnsuringSelection && (_stateDirty || _suppressionDirty))
             {
-                FlushStateIfDirty();
+                FlushStateIfDirty(true);
             }
 
             if (_topScope != null && _topScope.IsSelectableOwnedAndValid(selectedObject))
@@ -334,12 +326,54 @@ namespace UnityEngine.UI
 
         private void OnInputModeChanged(UXInputMode mode)
         {
-            _cursorPolicy?.OnInputModeChanged(mode, _topScope);
+            UXNavigationScope previousTopScope = _topScope;
             if (mode == UXInputMode.Gamepad || mode == UXInputMode.Keyboard)
             {
-                FlushStateIfDirty();
-                EnsureNavigationSelection();
+                FlushStateIfDirty(false);
             }
+
+            NotifyContextIfChanged(previousTopScope, _topScope);
+        }
+
+        private void SetTopScope(UXNavigationScope topScope, bool notifyContext)
+        {
+            if (ReferenceEquals(_topScope, topScope))
+            {
+                return;
+            }
+
+            UXNavigationScope previousTopScope = _topScope;
+            _topScope = topScope;
+            _suppressionDirty = true;
+            if (notifyContext)
+            {
+                NotifyContextIfChanged(previousTopScope, _topScope);
+            }
+            else
+            {
+                QueueContextNotification(previousTopScope);
+            }
+        }
+
+        private void QueueContextNotification(UXNavigationScope previousTopScope)
+        {
+            if (!_contextNotificationDirty)
+            {
+                _pendingPreviousTopScope = previousTopScope;
+                _contextNotificationDirty = true;
+            }
+        }
+
+        private void NotifyContextIfChanged(UXNavigationScope previousTopScope, UXNavigationScope currentTopScope)
+        {
+            if (_contextNotificationDirty)
+            {
+                previousTopScope = _pendingPreviousTopScope;
+                _pendingPreviousTopScope = null;
+                _contextNotificationDirty = false;
+            }
+
+            _cursorPolicy?.OnNavigationContextChanged(UXInputModeService.CurrentMode, previousTopScope, currentTopScope);
         }
 
         private static bool IsHigherPriority(UXNavigationScope left, UXNavigationScope right)
@@ -361,10 +395,10 @@ namespace UnityEngine.UI
             return left.ActivationSerial > right.ActivationSerial;
         }
 
-        private static void ReportCapacityExceeded(string message)
+        private static void ReportCapacityExceeded()
         {
 #if UNITY_EDITOR || DEVELOPMENT_BUILD
-            Debug.LogError(message);
+            Debug.LogError("UXNavigationRuntime scope capacity exceeded.");
 #endif
         }
     }

Runtime/UXComponent/Navigation/UXNavigationScope.cs

@@ -1,4 +1,4 @@
-#if INPUTSYSTEM_SUPPORT && UX_NAVIGATION
+#if INPUTSYSTEM_SUPPORT && UX_NAVIGATION
 using AlicizaX.UI.Runtime;
 using UnityEngine.EventSystems;
 
@@ -30,6 +30,14 @@ namespace UnityEngine.UI
         private bool _cachedIsSkipped;
         private bool _isSkippedCacheValid;
         private int _runtimeSelectableCount;
+        private int[] _bakedSelectableHashIds = System.Array.Empty<int>();
+        private int[] _bakedSelectableHashIndices = System.Array.Empty<int>();
+        private int[] _runtimeSelectableHashIds = System.Array.Empty<int>();
+        private int[] _runtimeSelectableHashIndices = System.Array.Empty<int>();
+        private bool _selectableSetDirty = true;
+        private bool _selectableAvailabilityDirty = true;
+        private int _availableSelectableCount;
+        private Selectable _firstAvailableSelectable;
 
         internal int RuntimeIndex { get; set; } = InvalidIndex;
         internal ulong ActivationSerial { get; set; }
@@ -45,6 +53,7 @@ namespace UnityEngine.UI
             set
             {
                 _defaultSelectable = value;
+                MarkSelectableAvailabilityDirty();
                 MarkRuntimeStateDirty();
             }
         }
@@ -59,7 +68,7 @@ namespace UnityEngine.UI
             {
                 if (!_isSkippedCacheValid)
                 {
-                    _cachedIsSkipped = GetComponentInParent<UXNavigationSkip>(true) != null;
+                    _cachedIsSkipped = HasSkipInParents();
                     _isSkippedCacheValid = true;
                 }
 
@@ -67,6 +76,22 @@ namespace UnityEngine.UI
             }
         }
 
+        private bool HasSkipInParents()
+        {
+            Transform current = transform;
+            while (current != null)
+            {
+                if (current.TryGetComponent(out UXNavigationSkip skip))
+                {
+                    return true;
+                }
+
+                current = current.parent;
+            }
+
+            return false;
+        }
+
         internal Canvas Canvas
         {
             get
@@ -99,14 +124,14 @@ namespace UnityEngine.UI
 
         private void Awake()
         {
-            EnsureRuntimeBuffers();
-            CaptureAllBaselines();
+            EnsureRuntimeBuffers(false);
+            RefreshBaselineWhenUnsuppressed();
         }
 
         private void OnEnable()
         {
-            EnsureRuntimeBuffers();
-            CaptureAllBaselines();
+            EnsureRuntimeBuffers(false);
+            RefreshBaselineWhenUnsuppressed();
             UXNavigationRuntime.EnsureInstance().RegisterScope(this);
         }
 
@@ -126,6 +151,7 @@ namespace UnityEngine.UI
 
         private void OnTransformChildrenChanged()
         {
+            MarkSelectableAvailabilityDirty();
             MarkRuntimeStateDirty();
         }
 
@@ -155,21 +181,21 @@ namespace UnityEngine.UI
                 return false;
             }
 
-            EnsureRuntimeBuffers();
+            EnsureRuntimeBuffers(true);
             if (_runtimeSelectableCount >= _runtimeSelectables.Length)
             {
                 ReportCapacityExceeded();
                 return false;
             }
 
-            _runtimeSelectables[_runtimeSelectableCount] = selectable;
-            _runtimeBaselineNavigation[_runtimeSelectableCount] = selectable.navigation;
-            _runtimeSelectableCount++;
+            int index = _runtimeSelectableCount++;
+            _runtimeSelectables[index] = selectable;
+            _runtimeBaselineNavigation[index] = selectable.navigation;
+            MarkSelectableSetDirty();
             if (_navigationSuppressed)
             {
-                SetSelectableSuppressed(selectable, true);
+                SetSelectableSuppressed(selectable);
             }
-
             MarkRuntimeStateDirty();
             return true;
         }
@@ -181,39 +207,51 @@ namespace UnityEngine.UI
                 return false;
             }
 
-            for (int i = 0; i < _runtimeSelectableCount; i++)
+            int index = FindRuntimeIndex(selectable);
+            if (index < 0)
             {
-                if (_runtimeSelectables[i] != selectable)
-                {
-                    continue;
-                }
-
-                if (_navigationSuppressed)
-                {
-                    selectable.navigation = _runtimeBaselineNavigation[i];
-                }
-
-                int last = _runtimeSelectableCount - 1;
-                _runtimeSelectables[i] = _runtimeSelectables[last];
-                _runtimeBaselineNavigation[i] = _runtimeBaselineNavigation[last];
-                _runtimeSelectables[last] = null;
-                _runtimeBaselineNavigation[last] = default(Navigation);
-                _runtimeSelectableCount--;
-                if (_lastSelected == selectable)
-                {
-                    _lastSelected = null;
-                }
-
-                MarkRuntimeStateDirty();
-                return true;
+                return false;
             }
 
-            return false;
+            if (_navigationSuppressed)
+            {
+                selectable.navigation = _runtimeBaselineNavigation[index];
+            }
+
+            int last = --_runtimeSelectableCount;
+            Selectable movedSelectable = _runtimeSelectables[last];
+            Navigation movedNavigation = _runtimeBaselineNavigation[last];
+            _runtimeSelectables[last] = null;
+            _runtimeBaselineNavigation[last] = default(Navigation);
+            if (index != last)
+            {
+                _runtimeSelectables[index] = movedSelectable;
+                _runtimeBaselineNavigation[index] = movedNavigation;
+            }
+
+            if (_lastSelected == selectable)
+            {
+                _lastSelected = null;
+            }
+            MarkSelectableSetDirty();
+            MarkRuntimeStateDirty();
+            return true;
         }
 
         public void InvalidateSelectableCache()
         {
-            CaptureAllBaselines();
+            if (_navigationSuppressed)
+            {
+                ApplySuppression(_bakedSelectables, _bakedBaselineNavigation, BakedSelectableCount, false);
+                ApplySuppression(_runtimeSelectables, _runtimeBaselineNavigation, _runtimeSelectableCount, false);
+                CaptureBaselineBeforeSuppress();
+                ApplySuppression(_bakedSelectables, _bakedBaselineNavigation, BakedSelectableCount, true);
+                ApplySuppression(_runtimeSelectables, _runtimeBaselineNavigation, _runtimeSelectableCount, true);
+            }
+            else
+            {
+                RefreshBaselineWhenUnsuppressed();
+            }
             MarkRuntimeStateDirty();
         }
 
@@ -260,6 +298,7 @@ namespace UnityEngine.UI
 
         internal Selectable GetPreferredSelectable()
         {
+            RefreshSelectableAvailabilityIfDirty();
             if (_rememberLastSelection && IsSelectableValid(_lastSelected))
             {
                 return _lastSelected;
@@ -270,25 +309,18 @@ namespace UnityEngine.UI
                 return _defaultSelectable;
             }
 
-            if (!_autoSelectFirstAvailable)
-            {
-                return null;
-            }
-
-            Selectable selectable = FirstUsable(_bakedSelectables, BakedSelectableCount);
-            if (selectable != null)
-            {
-                return selectable;
-            }
-
-            return FirstUsable(_runtimeSelectables, _runtimeSelectableCount);
+            return _autoSelectFirstAvailable ? _firstAvailableSelectable : null;
         }
 
         internal bool HasAvailableSelectable()
         {
-            return IsSelectableValid(_defaultSelectable)
-                   || FirstUsable(_bakedSelectables, BakedSelectableCount) != null
-                   || FirstUsable(_runtimeSelectables, _runtimeSelectableCount) != null;
+            RefreshSelectableAvailabilityIfDirty();
+            if (IsSelectableValid(_defaultSelectable))
+            {
+                return true;
+            }
+
+            return _autoSelectFirstAvailable && _availableSelectableCount > 0;
         }
 
         internal void RecordSelection(GameObject selectedObject)
@@ -317,36 +349,78 @@ namespace UnityEngine.UI
                 return;
             }
 
-            CaptureAllBaselines();
+            if (suppressed)
+            {
+                CaptureBaselineBeforeSuppress();
+            }
+
             _navigationSuppressed = suppressed;
             ApplySuppression(_bakedSelectables, _bakedBaselineNavigation, BakedSelectableCount, suppressed);
             ApplySuppression(_runtimeSelectables, _runtimeBaselineNavigation, _runtimeSelectableCount, suppressed);
         }
 
-        private void EnsureRuntimeBuffers()
+        private void EnsureRuntimeBuffers(bool preserveRuntimeSelectables)
         {
             int capacity = _runtimeSelectableCapacity > 0 ? _runtimeSelectableCapacity : 0;
             if (_runtimeSelectables == null || _runtimeSelectables.Length != capacity)
             {
+                Selectable[] previousSelectables = _runtimeSelectables;
+                Navigation[] previousBaseline = _runtimeBaselineNavigation;
+                int previousCount = _runtimeSelectableCount;
                 _runtimeSelectables = capacity > 0 ? new Selectable[capacity] : System.Array.Empty<Selectable>();
                 _runtimeBaselineNavigation = capacity > 0 ? new Navigation[capacity] : System.Array.Empty<Navigation>();
+                CreateRuntimeHash(capacity);
                 _runtimeSelectableCount = 0;
+
+                if (preserveRuntimeSelectables && previousSelectables != null && capacity > 0)
+                {
+                    int copyCount = previousCount < capacity ? previousCount : capacity;
+                    for (int i = 0; i < copyCount; i++)
+                    {
+                        Selectable selectable = previousSelectables[i];
+                        if (selectable == null)
+                        {
+                            continue;
+                        }
+
+                        _runtimeSelectables[_runtimeSelectableCount] = selectable;
+                        _runtimeBaselineNavigation[_runtimeSelectableCount] = previousBaseline != null && i < previousBaseline.Length
+                            ? previousBaseline[i]
+                            : selectable.navigation;
+                        _runtimeSelectableCount++;
+                    }
+                }
+
+                MarkSelectableSetDirty();
             }
 
             int bakedCount = BakedSelectableCount;
             if (_bakedBaselineNavigation == null || _bakedBaselineNavigation.Length != bakedCount)
             {
                 _bakedBaselineNavigation = bakedCount > 0 ? new Navigation[bakedCount] : System.Array.Empty<Navigation>();
+                CreateBakedHash(bakedCount);
+                MarkSelectableSetDirty();
             }
         }
 
-        private void CaptureAllBaselines()
+        private void CaptureBaselineBeforeSuppress()
         {
-            EnsureRuntimeBuffers();
+            EnsureRuntimeBuffers(true);
+            RefreshSelectableHashesIfDirty();
             CaptureBaseline(_bakedSelectables, _bakedBaselineNavigation, BakedSelectableCount);
             CaptureBaseline(_runtimeSelectables, _runtimeBaselineNavigation, _runtimeSelectableCount);
         }
 
+        private void RefreshBaselineWhenUnsuppressed()
+        {
+            if (_navigationSuppressed)
+            {
+                return;
+            }
+
+            CaptureBaselineBeforeSuppress();
+        }
+
         private static void CaptureBaseline(Selectable[] selectables, Navigation[] baseline, int count)
         {
             if (selectables == null || baseline == null)
@@ -381,7 +455,7 @@ namespace UnityEngine.UI
 
                 if (suppressed)
                 {
-                    SetSelectableSuppressed(selectable, true);
+                    SetSelectableSuppressed(selectable);
                 }
                 else
                 {
@@ -390,9 +464,9 @@ namespace UnityEngine.UI
             }
         }
 
-        private static void SetSelectableSuppressed(Selectable selectable, bool suppressed)
+        private static void SetSelectableSuppressed(Selectable selectable)
         {
-            if (selectable == null || !suppressed)
+            if (selectable == null)
             {
                 return;
             }
@@ -404,8 +478,15 @@ namespace UnityEngine.UI
 
         private bool ContainsSelectable(Selectable selectable)
         {
-            return IndexOf(_bakedSelectables, BakedSelectableCount, selectable) >= 0
-                   || IndexOf(_runtimeSelectables, _runtimeSelectableCount, selectable) >= 0;
+            if (selectable == null)
+            {
+                return false;
+            }
+
+            RefreshSelectableHashesIfDirty();
+            int instanceId = selectable.GetInstanceID();
+            return FindHashIndex(_bakedSelectableHashIds, _bakedSelectableHashIndices, instanceId) >= 0
+                   || FindHashIndex(_runtimeSelectableHashIds, _runtimeSelectableHashIndices, instanceId) >= 0;
         }
 
         private bool IsSelectableValid(Selectable selectable)
@@ -413,25 +494,204 @@ namespace UnityEngine.UI
             return IsSelectableUsable(selectable) && ContainsSelectable(selectable);
         }
 
-        private static Selectable FirstUsable(Selectable[] selectables, int count)
+        private void MarkSelectableSetDirty()
+        {
+            _selectableSetDirty = true;
+            MarkSelectableAvailabilityDirty();
+        }
+
+        private void MarkSelectableAvailabilityDirty()
+        {
+            _selectableAvailabilityDirty = true;
+        }
+
+        public void NotifySelectableStateChanged()
+        {
+            MarkSelectableAvailabilityDirty();
+            MarkRuntimeStateDirty();
+        }
+
+        private void RefreshSelectableAvailabilityIfDirty()
+        {
+            if (!_selectableAvailabilityDirty)
+            {
+                return;
+            }
+
+            _availableSelectableCount = 0;
+            _firstAvailableSelectable = null;
+            AccumulateAvailableSelectables(_bakedSelectables, BakedSelectableCount);
+            AccumulateAvailableSelectables(_runtimeSelectables, _runtimeSelectableCount);
+            _selectableAvailabilityDirty = false;
+        }
+
+        private void AccumulateAvailableSelectables(Selectable[] selectables, int count)
         {
             if (selectables == null)
             {
-                return null;
+                return;
             }
 
             for (int i = 0; i < count; i++)
             {
                 Selectable selectable = selectables[i];
-                if (IsSelectableUsable(selectable))
+                if (!IsSelectableUsable(selectable))
                 {
-                    return selectable;
+                    continue;
                 }
+
+                if (_firstAvailableSelectable == null)
+                {
+                    _firstAvailableSelectable = selectable;
+                }
+
+                _availableSelectableCount++;
+            }
+        }
+        private void RefreshSelectableHashesIfDirty()
+        {
+            if (!_selectableSetDirty)
+            {
+                return;
             }
 
-            return null;
+            RebuildBakedHash();
+            RebuildRuntimeHash();
+            _selectableSetDirty = false;
         }
 
+        private void RebuildBakedHash()
+        {
+            ClearHash(_bakedSelectableHashIds, _bakedSelectableHashIndices);
+            for (int i = 0; i < BakedSelectableCount; i++)
+            {
+                Selectable selectable = _bakedSelectables[i];
+                if (selectable != null)
+                {
+                    AddHash(_bakedSelectableHashIds, _bakedSelectableHashIndices, selectable.GetInstanceID(), i);
+                }
+            }
+        }
+
+        private void RebuildRuntimeHash()
+        {
+            ClearHash(_runtimeSelectableHashIds, _runtimeSelectableHashIndices);
+            for (int i = 0; i < _runtimeSelectableCount; i++)
+            {
+                Selectable selectable = _runtimeSelectables[i];
+                if (selectable != null)
+                {
+                    AddHash(_runtimeSelectableHashIds, _runtimeSelectableHashIndices, selectable.GetInstanceID(), i);
+                }
+            }
+        }
+
+        private void CreateBakedHash(int itemCapacity)
+        {
+            int hashCapacity = GetHashCapacity(itemCapacity);
+            _bakedSelectableHashIds = hashCapacity > 0 ? new int[hashCapacity] : System.Array.Empty<int>();
+            _bakedSelectableHashIndices = hashCapacity > 0 ? new int[hashCapacity] : System.Array.Empty<int>();
+        }
+
+        private void CreateRuntimeHash(int itemCapacity)
+        {
+            int hashCapacity = GetHashCapacity(itemCapacity);
+            _runtimeSelectableHashIds = hashCapacity > 0 ? new int[hashCapacity] : System.Array.Empty<int>();
+            _runtimeSelectableHashIndices = hashCapacity > 0 ? new int[hashCapacity] : System.Array.Empty<int>();
+        }
+
+        private static int GetHashCapacity(int itemCapacity)
+        {
+            if (itemCapacity <= 0)
+            {
+                return 0;
+            }
+
+            int hashCapacity = 1;
+            int required = itemCapacity << 1;
+            while (hashCapacity < required)
+            {
+                hashCapacity <<= 1;
+            }
+
+            return hashCapacity;
+        }
+
+        private static void ClearHash(int[] ids, int[] indices)
+        {
+            if (ids == null || indices == null)
+            {
+                return;
+            }
+
+            for (int i = 0; i < ids.Length; i++)
+            {
+                ids[i] = 0;
+                indices[i] = InvalidIndex;
+            }
+        }
+
+        private static int FindHashIndex(int[] ids, int[] indices, int instanceId)
+        {
+            if (ids == null || indices == null || ids.Length == 0 || instanceId == 0)
+            {
+                return InvalidIndex;
+            }
+
+            int mask = ids.Length - 1;
+            int index = instanceId & mask;
+            for (int i = 0; i < ids.Length; i++)
+            {
+                int storedId = ids[index];
+                if (storedId == 0)
+                {
+                    return InvalidIndex;
+                }
+
+                if (storedId == instanceId)
+                {
+                    return indices[index];
+                }
+
+                index = (index + 1) & mask;
+            }
+
+            return InvalidIndex;
+        }
+
+        private static void AddHash(int[] ids, int[] indices, int instanceId, int selectableIndex)
+        {
+            if (ids == null || indices == null || ids.Length == 0 || instanceId == 0)
+            {
+                return;
+            }
+
+            int mask = ids.Length - 1;
+            int index = instanceId & mask;
+            for (int i = 0; i < ids.Length; i++)
+            {
+                int storedId = ids[index];
+                if (storedId == 0 || storedId == instanceId)
+                {
+                    ids[index] = instanceId;
+                    indices[index] = selectableIndex;
+                    return;
+                }
+
+                index = (index + 1) & mask;
+            }
+        }
+
+        private int FindRuntimeIndex(Selectable selectable)
+        {
+            if (selectable == null)
+            {
+                return InvalidIndex;
+            }
+
+            RefreshSelectableHashesIfDirty();
+            return FindHashIndex(_runtimeSelectableHashIds, _runtimeSelectableHashIndices, selectable.GetInstanceID());
+        }
         private static int IndexOf(Selectable[] selectables, int count, Selectable selectable)
         {
             if (selectables == null || selectable == null)
@@ -484,3 +744,11 @@ namespace UnityEngine.UI
     }
 }
 #endif
+
+
+
+
+
+
+
+