feat: Copy object instance id

Author: SolarianZ

Editor/Scripts/AssetHandle.cs

@@ -252,6 +252,11 @@ public void CopyTypeFullNameToSystemBuffer()
             GUIUtility.systemCopyBuffer = GetAssetTypeFullName();
         }
 
+        public void CopyInstanceIdToSystemBuffer()
+        {
+            GUIUtility.systemCopyBuffer = GetAssetInstanceId().ToString();
+        }
+
         public string GetAssetName()
         {
             switch (Category)
@@ -333,13 +338,35 @@ public string GetAssetTypeFullName()
                     return null;
 
                 case AssetCategory.ExternalFile:
+                case AssetCategory.Url:
                     return null;
 
                 default:
                     throw new ArgumentOutOfRangeException(nameof(Category), Category, null);
             }
         }
 
+        public int GetAssetInstanceId()
+        {
+            switch (Category)
+            {
+                case AssetCategory.ProjectAsset:
+                case AssetCategory.SceneObject:
+                    if (_asset)
+                    {
+                        return _asset.GetInstanceID();
+                    }
+                    return 0;
+
+                case AssetCategory.ExternalFile:
+                case AssetCategory.Url:
+                    return 0;
+
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(Category), Category, null);
+            }
+        }
+
         public string GetDisplayName()
         {
             if (Asset)

Editor/Scripts/AssetQuickAccessWindow.ListContent.cs

@@ -233,6 +233,7 @@ private void ShowProjectAssetContextMenu(AssetHandle assetHandle)
                 genericMenu.AddItem(new GUIContent("Copy Path"), false, assetHandle.CopyPathToSystemBuffer);
                 genericMenu.AddItem(new GUIContent("Copy Guid"), false, assetHandle.CopyGuidToSystemBuffer);
                 genericMenu.AddItem(new GUIContent("Copy Type"), false, assetHandle.CopyTypeFullNameToSystemBuffer);
+                genericMenu.AddItem(new GUIContent("Copy Instance ID"), false, assetHandle.CopyInstanceIdToSystemBuffer);
                 genericMenu.AddItem(new GUIContent("Show in Folder"), false, assetHandle.ShowInFolder);
             }
             else
@@ -254,6 +255,7 @@ private void ShowSceneObjectContextMenu(AssetHandle assetHandle)
                 genericMenu.AddItem(new GUIContent("Open"), false, assetHandle.OpenAsset);
                 genericMenu.AddItem(new GUIContent("Copy Hierarchy Path"), false, assetHandle.CopyPathToSystemBuffer);
                 genericMenu.AddItem(new GUIContent("Copy Type"), false, assetHandle.CopyTypeFullNameToSystemBuffer);
+                genericMenu.AddItem(new GUIContent("Copy Instance ID"), false, assetHandle.CopyInstanceIdToSystemBuffer);
             }
             else if (assetHandle.Scene)
             {