Add main mesh fixes

2021-02-23 02:13:14 +02:00 · 2021-02-23 02:13:14 +02:00 · 989424e659
commit 989424e659
parent c89f326c37
139 changed files with 8101 additions and 2033 deletions
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--- a/Cleaner/Content/ac_multiselect.png
+++ b/Cleaner/Content/ac_multiselect.png
--- a/Cleaner/Content/ac_multiselect.png.meta
+++ b/Cleaner/Content/ac_multiselect.png.meta
@ -0,0 +1,110 @@
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--- a/Cleaner/Content/ac_unlock.png
+++ b/Cleaner/Content/ac_unlock.png
--- a/Assets/Scenes/Main_scene/Lightmap-10_comp_light.exr.meta
+++ b/Assets/Scenes/Main_scene/Lightmap-10_comp_light.exr.meta
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--- a/Cleaner/Data.meta
+++ b/Cleaner/Data.meta
@ -0,0 +1,8 @@
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--- a/Cleaner/Data/AufSerializableData.cs
+++ b/Cleaner/Data/AufSerializableData.cs
@ -0,0 +1,74 @@
+using System;
+using System.Linq;
+
+namespace Asset_Cleaner {
+    [Serializable]
+    class AufSerializableData {
+        public const int CurrentVersion = 1;
+        public int Version;
+        public bool MarkRed;
+        public int RebuildCacheOnDemand;
+        public bool ShowInfoBox;
+        public string IgnorePathContainsCombined;
+        public bool IgnoreMaterial;
+        public bool IgnoreScriptable;
+
+        static int BoolToInt(bool val) {
+            return val ? 2 : 1;
+        }
+
+        static bool IntToBool(int val, bool defaultVal) {
+            switch (val) {
+                case 2:
+                    return true;
+                case 1:
+                    return false;
+                default:
+                    return defaultVal;
+            }
+        }
+
+        public static AufSerializableData Default() {
+            return new AufSerializableData {
+                Version = CurrentVersion,
+                MarkRed = true,
+                ShowInfoBox = true,
+                IgnorePathContainsCombined = "Gizmos;Resources;Editor;Asset Cleaner;Asset Usage Finder;",
+                IgnoreMaterial = false,
+                IgnoreScriptable = true,
+                RebuildCacheOnDemand = 2,
+            };
+        }
+
+        public static void OnSerialize(in Config src, out AufSerializableData result) {
+            result = new AufSerializableData();
+            result.Version = CurrentVersion;
+            result.MarkRed = src.MarkRed;
+            result.ShowInfoBox = src.ShowInfoBox;
+            result.IgnorePathContainsCombined = src.IgnorePathContainsCombined;
+            result.IgnoreMaterial = src.IgnoreMaterial;
+            result.IgnoreScriptable = src.IgnoreScriptable;
+            result.RebuildCacheOnDemand = BoolToInt(src.RebuildCacheOnDemand);
+        }
+
+        public static void OnDeserialize(in AufSerializableData src, ref Config result) {
+            var def = Default();
+
+            result.MarkRed = src.MarkRed;
+            result.IgnorePathContainsCombined = src.IgnorePathContainsCombined;
+            result.ShowInfoBox = src.ShowInfoBox;
+            result.IgnorePathContains = result.IgnorePathContainsCombined
+                .Split(';')
+                .Select(s => s.Trim())
+                .Where(s => !string.IsNullOrWhiteSpace(s))
+                .ToArray();
+            result.IgnoreMaterial = src.IgnoreMaterial;
+            result.IgnoreScriptable = src.IgnoreScriptable;
+            result.RebuildCacheOnDemand = IntToBool(src.RebuildCacheOnDemand, def.RebuildCacheOnDemand == 2);
+        }
+
+        public bool Valid() {
+            return Version == CurrentVersion || IgnorePathContainsCombined == null;
+        }
+    }
+}
--- a/Cleaner/Data/AufSerializableData.cs.meta
+++ b/Cleaner/Data/AufSerializableData.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 14980ecc573d44c59b5f9323603c7bdf
+timeCreated: 1588518687
--- a/Cleaner/Data/CleanerStyleAsset.cs
+++ b/Cleaner/Data/CleanerStyleAsset.cs
@ -0,0 +1,105 @@
+using System;
+using System.Linq;
+using UnityEditor;
+using UnityEngine;
+using Object = UnityEngine.Object;
+
+#pragma warning disable 649
+
+namespace Asset_Cleaner {
+    class CleanerStyleAsset : ScriptableObject {
+        [Serializable]
+        public class Style {
+            public Color RedHighlight = new Color(1, 0, 0, 1f);
+
+            public GUIContent Lock;
+            public GUIStyle LockBtn = new GUIStyle();
+            public GUIStyle SampleBtn = new GUIStyle();
+
+            public GUIContent Unlock;
+            public GUIStyle UnlockBtn = new GUIStyle();
+
+            public GUIContent RemoveFile;
+            public GUIContent RemoveScene;
+
+            public GUIStyle RowMainAssetBtn = new GUIStyle();
+            public GUIStyle RemoveUnusedBtn = new GUIStyle();
+
+            public GUIStyle CurrentBtn = new GUIStyle();
+
+            public GUIContent ArrowL;
+            public GUIContent ArrowR;
+            public GUIStyle ArrowBtn = new GUIStyle();
+
+            public float SceneIndent1 = 20f;
+            public float SceneIndent2 = 20f;
+            public GUIStyle ProjectViewCounterLabel;
+
+            public GUIContent MultiSelect;
+
+            public static bool TryFindSelf(out Style value) {
+                const string typeName = nameof(CleanerStyleAsset);
+
+                var guids = AssetDatabase.FindAssets($"t:{typeName}");
+                if (!guids.Any()) {
+                    AssetDatabase.Refresh(ImportAssetOptions.ForceUpdate);
+                }
+
+                Asr.IsTrue(guids.Length > 0, $"No '{typeName}' assets found");
+                var res = guids.Select(AssetDatabase.GUIDToAssetPath).Select(t => (CleanerStyleAsset) AssetDatabase.LoadAssetAtPath(t, typeof(CleanerStyleAsset))).FirstOrDefault();
+                if (res == null) {
+                    value = default;
+                    return false;
+                }
+
+                value = EditorGUIUtility.isProSkin ? res.Pro : res.Personal;
+                return value != null;
+            }
+        }
+#pragma warning disable 0649
+        public Style Pro;
+        public Style Personal;
+#pragma warning restore
+
+        [CustomEditor(typeof(CleanerStyleAsset))]
+        class Editor : UnityEditor.Editor {
+            public override void OnInspectorGUI() {
+#if false
+                     if (GUILayout.Button("Update Btn backgrounds")) {
+                    var targ = (CleanerStyleAsset) target; 
+                    Set(targ.Pro);
+                }
+#endif
+                EditorGUI.BeginChangeCheck();
+                base.OnInspectorGUI();
+                if (EditorGUI.EndChangeCheck())
+                    UnityEditorInternal.InternalEditorUtility.RepaintAllViews();
+            }
+
+#if false
+            static void Set(Style style) {
+                var st = style;
+                var sample = st.SampleBtn;
+
+                foreach (var btn in new[] {
+                    st.LockBtn,
+                    st.UnlockBtn,
+                    st.RowMainAssetBtn,
+                    st.RemoveUnusedBtn,
+                    st.CurrentBtn,
+                    st.ArrowBtn,
+                }) {
+                    btn.normal = sample.normal;
+                    btn.hover = sample.hover;
+                    btn.active = sample.active;
+                    btn.focused = sample.focused;
+                    btn.onNormal = sample.onNormal;
+                    btn.onHover = sample.onHover;
+                    btn.onActive = sample.onActive;
+                    btn.onFocused = sample.onFocused;
+                }
+            }
+#endif
+        }
+    }
+}
--- a/Cleaner/Data/CleanerStyleAsset.cs.meta
+++ b/Cleaner/Data/CleanerStyleAsset.cs.meta
@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 16578cbec6a24ac4d951b5f328a970ca
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Cleaner/Data/FindModeEnum.cs
+++ b/Cleaner/Data/FindModeEnum.cs
@ -0,0 +1,8 @@
+namespace Asset_Cleaner {
+    enum FindModeEnum {
+        None = 0,
+        File = 1,
+        Scene = 2,
+        Stage = 3,
+    }
+}
--- a/Cleaner/Data/FindModeEnum.cs.meta
+++ b/Cleaner/Data/FindModeEnum.cs.meta
@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 34e14d6333c649f4fb74ccdb6c86d8b6
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
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+  assetBundleVariant: 
--- a/Cleaner/Data/Globals.meta
+++ b/Cleaner/Data/Globals.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: f94bcb0962724eeea17b007a6ddfd885
+timeCreated: 1596213773
--- a/Cleaner/Data/Globals/BacklinkStore.cs
+++ b/Cleaner/Data/Globals/BacklinkStore.cs
@ -0,0 +1,286 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using UnityEditor;
+using UnityEditorInternal;
+using Debug = UnityEngine.Debug;
+using Object = UnityEngine.Object;
+
+namespace Asset_Cleaner {
+    class BacklinkStore {
+        public bool Initialized { get; private set; }
+
+        public Dictionary<string, long> UnusedFiles { get; private set; }
+        public Dictionary<string, long> UnusedScenes { get; private set; }
+        public Dictionary<string, BwMeta> Backward { get; private set; }
+        public Dictionary<string, UnusedQty> FoldersWithQty { get; private set; }
+
+        Dictionary<string, FwMeta> _forward;
+        List<string> Folders { get; set; }
+
+
+        public void Init() {
+            FoldersWithQty = new Dictionary<string, UnusedQty>();
+            _forward = new Dictionary<string, FwMeta>();
+            Backward = new Dictionary<string, BwMeta>();
+
+            var defaultAss = typeof(DefaultAsset);
+            var asmdefAss = typeof(AssemblyDefinitionAsset);
+
+            var paths = AssetDatabase.GetAllAssetPaths()
+                .Distinct()
+                .Where(s => s.StartsWith("Assets") || s.StartsWith("ProjectSettings"))
+                .Where(p => {
+                    var t = AssetDatabase.GetMainAssetTypeAtPath(p);
+                    return !t.IsAssignableFromInverse(defaultAss) && !t.IsAssignableFromInverse(asmdefAss);
+                })
+                .ToArray();
+
+
+            var i = 0f;
+            var total = (float) paths.Length;
+            foreach (var path in paths) {
+                _FillFwAndBacklinks(path);
+                var percent = i * 100f / total;
+                if (Math.Abs(percent % 5f) < 0.01f) {
+                    if (EditorUtility.DisplayCancelableProgressBar(
+                        "Please wait...",
+                        "Building the cache...", percent))
+                        Debug.LogError("Cache build aborted");
+                }
+
+                i++;
+            }
+
+            EditorUtility.ClearProgressBar();
+
+            // FillFoldersWithQtyByPaths
+            List<string> foldersAll = new List<string>();
+            foreach (var path in paths) {
+                var folders = GetAllFoldersFromPath(path);
+                foldersAll.AddRange(folders);
+            }
+
+            Folders = foldersAll.Distinct().OrderBy(p => p).ToList();
+            UpdateUnusedAssets();
+            Initialized = true;
+        }
+
+        void _FillFwAndBacklinks(string path) {
+            var dependencies = _Dependencies(path);
+            var hs = new FwMeta {Dependencies = new HashSet<string>(dependencies)};
+            _forward.Add(path, hs);
+            foreach (var backPath in dependencies) {
+                if (!Backward.TryGetValue(backPath, out var val)) {
+                    val = new BwMeta();
+                    val.Lookup = new HashSet<string>();
+                    Backward.Add(backPath, val);
+                }
+
+                val.Lookup.Add(path);
+            }
+        }
+
+
+        void UpdateFoldersWithQtyByPath(string path) {
+            var folders = GetAllFoldersFromPath(path);
+            foreach (var folder in folders) {
+                if (!Folders.Exists(p => p == folder))
+                    Folders.Add(folder);
+            }
+        }
+
+
+        static List<string> GetAllFoldersFromPath(string p) {
+            var result = new List<string>();
+            var i = p.IndexOf('/', 0);
+            while (i > 0) {
+                var item = p.Substring(0, i);
+                result.Add(item);
+                i = p.IndexOf('/', i + 1);
+            }
+
+            return result.Distinct().ToList();
+        }
+
+        public void UpdateUnusedAssets() {
+            var all = new HashSet<string>(_forward.Keys);
+            var withBacklinks =
+                new HashSet<string>(Backward.Where(kv => kv.Value.Lookup.Count > 0).Select(kv => kv.Key));
+
+            all.ExceptWith(withBacklinks);
+            all.RemoveWhere(SearchUtils.IsFileIgrnoredBySettings);
+
+            var unusedAssets = all;
+
+            var scenes = unusedAssets.Where(s =>
+                AssetDatabase.GetMainAssetTypeAtPath(s).IsAssignableFromInverse(typeof(SceneAsset))).ToArray();
+
+            unusedAssets.ExceptWith(scenes);
+            var files = unusedAssets;
+            UnusedFiles = new Dictionary<string, long>();
+            
+            foreach (var file in files) UnusedFiles[file] = CommonUtils.Size(file);
+
+            UnusedScenes = new Dictionary<string, long>();
+            foreach (var scene in scenes) UnusedScenes[scene] = CommonUtils.Size(scene);
+            
+            // UpdateFoldersWithQty();
+            foreach (var folder in Folders) {
+                var unusedFilesQty = UnusedFiles.Count(p => p.Key.StartsWith(folder));
+                var unusedScenesQty = UnusedScenes.Count(p => p.Key.StartsWith(folder));
+                long size = 0;
+                size = UnusedFiles.Where((p => p.Key.StartsWith(folder))).Sum(p => p.Value);
+                size += UnusedScenes.Where(p => p.Key.StartsWith(folder)).Sum(p => p.Value);
+
+                FoldersWithQty.TryGetValue(folder, out var folderWithQty);
+                if (folderWithQty == null) {
+                    FoldersWithQty.Add(folder, new UnusedQty(unusedFilesQty, unusedScenesQty, size));
+                }
+                else {
+                    folderWithQty.UnusedFilesQty = unusedFilesQty;
+                    folderWithQty.UnusedScenesQty = unusedScenesQty;
+                    folderWithQty.UnusedSize = size;
+                }
+            }
+        }
+
+
+        public void Remove(string path) {
+            if (!_forward.TryGetValue(path, out var fwMeta))
+                return;
+
+            foreach (var dependency in fwMeta.Dependencies) {
+                if (!Backward.TryGetValue(dependency, out var dep)) continue;
+
+                dep.Lookup.Remove(path);
+            }
+
+            _forward.Remove(path);
+            UpdateFoldersWithQtyByPath(path);
+        }
+
+        public void Replace(string src, string dest) {
+            _Upd(_forward);
+            _Upd(Backward);
+            UpdateFoldersWithQtyByPath(dest);
+
+            void _Upd<T>(Dictionary<string, T> dic) {
+                if (!dic.TryGetValue(src, out var refs)) return;
+
+                dic.Remove(src);
+                dic.Add(dest, refs);
+            }
+        }
+
+        public void RebuildFor(string path, bool remove) {
+            if (!_forward.TryGetValue(path, out var fwMeta)) {
+                fwMeta = new FwMeta();
+                _forward.Add(path, fwMeta);
+            }
+            else if (remove) {
+                foreach (var dependency in fwMeta.Dependencies) {
+                    if (!Backward.TryGetValue(dependency, out var backDep)) continue;
+
+                    backDep.Lookup.Remove(path);
+                }
+
+                fwMeta.Dependencies = null;
+            }
+
+            var dependencies = _Dependencies(path);
+            fwMeta.Dependencies = new HashSet<string>(dependencies);
+
+            foreach (var backPath in dependencies) {
+                if (!Backward.TryGetValue(backPath, out var bwMeta)) {
+                    bwMeta = new BwMeta {Lookup = new HashSet<string>()};
+                    Backward.Add(backPath, bwMeta);
+                }
+                else if (remove)
+                    bwMeta.Lookup.Remove(path);
+
+                bwMeta.Lookup.Add(path);
+            }
+
+            if (!remove) {
+                UpdateFoldersWithQtyByPath(path);
+            }
+        }
+
+
+        static string[] _Dependencies(string s) {
+            if (s[0] == 'A')
+                return AssetDatabase.GetDependencies(s, false);
+            var obj = LoadAllOrMain(s)[0];
+            return GetDependenciesManualPaths().ToArray();
+
+            Object[] LoadAllOrMain(string assetPath) {
+                // prevents error "Do not use readobjectthreaded on scene objects!"
+                return typeof(SceneAsset) == AssetDatabase.GetMainAssetTypeAtPath(assetPath)
+                    ? new[] {AssetDatabase.LoadMainAssetAtPath(assetPath)}
+                    : AssetDatabase.LoadAllAssetsAtPath(assetPath);
+            }
+
+            IEnumerable<string> GetDependenciesManualPaths() {
+                if (obj is EditorBuildSettings) {
+                    foreach (var scene in EditorBuildSettings.scenes)
+                        yield return scene.path;
+                }
+
+                using (var so = new SerializedObject(obj)) {
+                    var props = so.GetIterator();
+                    while (props.Next(true)) {
+                        switch (props.propertyType) {
+                            case SerializedPropertyType.ObjectReference:
+                                var propsObjectReferenceValue = props.objectReferenceValue;
+                                if (!propsObjectReferenceValue) continue;
+
+                                var assetPath = AssetDatabase.GetAssetPath(propsObjectReferenceValue);
+                                yield return assetPath;
+                                break;
+#if later
+                        case SerializedPropertyType.Generic:
+                        case SerializedPropertyType.ExposedReference:
+                        case SerializedPropertyType.ManagedReference:
+                            break;
+#endif
+                            default:
+                                continue;
+                        }
+                    }
+                }
+            }
+        }
+
+
+        class FwMeta {
+            public HashSet<string> Dependencies;
+        }
+
+        public class BwMeta {
+            public HashSet<string> Lookup;
+        }
+
+        public class UnusedQty {
+            public int UnusedFilesQty;
+            public int UnusedScenesQty;
+
+            public long UnusedSize;
+
+            public UnusedQty() {
+                Init(0, 0, 0);
+            }
+
+            public UnusedQty(int unusedFilesQty, int unusedScenesQty, long unusedSize) {
+                Init(unusedFilesQty, unusedScenesQty, unusedSize);
+            }
+
+            private void Init(int unusedFilesQty, int unusedScenesQty, long unusedSize) {
+                UnusedFilesQty = unusedFilesQty;
+                UnusedScenesQty = unusedScenesQty;
+                UnusedSize = unusedSize;
+            }
+        }
+    }
+}
--- a/Cleaner/Data/Globals/BacklinkStore.cs.meta
+++ b/Cleaner/Data/Globals/BacklinkStore.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 004e5680782f4e679ae93027d2d40023
+timeCreated: 1577106223
--- a/Cleaner/Data/Globals/Config.cs
+++ b/Cleaner/Data/Globals/Config.cs
@ -0,0 +1,20 @@
+namespace Asset_Cleaner {
+    class Config {
+        // serialized
+        public bool MarkRed;
+        public string IgnorePathContainsCombined;
+        public bool ShowInfoBox;
+        public bool RebuildCacheOnDemand;
+
+        // todo make type array
+        public bool IgnoreMaterial;
+        public bool IgnoreScriptable;
+
+        // serialized only while window is opened
+        public bool Locked;
+
+        // non-serialized
+        public string[] IgnorePathContains;
+        public string InitializationTime;
+    }
+}
--- a/Cleaner/Data/Globals/Config.cs.meta
+++ b/Cleaner/Data/Globals/Config.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: a6ff796e4dab4324887a303cba29eed4
+timeCreated: 1577117228
--- a/Cleaner/Data/Globals/PersistentUndoRedoState.cs
+++ b/Cleaner/Data/Globals/PersistentUndoRedoState.cs
@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+
+namespace Asset_Cleaner {
+    [Serializable]
+    class PersistentUndoRedoState {
+        public List<SelectionEntry> History = new List<SelectionEntry>();
+        public int Id;
+
+        public void Deconstruct(out List<SelectionEntry> list, out int id) {
+            id = Id;
+            list = History;
+        }
+    }
+}
--- a/Cleaner/Data/Globals/PersistentUndoRedoState.cs.meta
+++ b/Cleaner/Data/Globals/PersistentUndoRedoState.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 5414db21dfea4d7eaff8ce4c8f106c8d
+timeCreated: 1596213717
--- a/Cleaner/Data/Globals/UndoRedoState.cs
+++ b/Cleaner/Data/Globals/UndoRedoState.cs
@ -0,0 +1,6 @@
+namespace Asset_Cleaner {
+    class UndoRedoState {
+        public bool UndoEnabled;
+        public bool RedoEnabled;
+    }
+}
--- a/Cleaner/Data/Globals/UndoRedoState.cs.meta
+++ b/Cleaner/Data/Globals/UndoRedoState.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: c3ac9efa32c8491aa8a11749f8020d96
+timeCreated: 1596213776
--- a/Cleaner/Data/Globals/WindowData.cs
+++ b/Cleaner/Data/Globals/WindowData.cs
@ -0,0 +1,14 @@
+using UnityEngine;
+
+namespace Asset_Cleaner {
+    class WindowData {
+        public bool ExpandFiles;
+        public bool ExpandScenes;
+        public Vector2 ScrollPos;
+        public CleanerStyleAsset.Style Style;
+        public GUIContent SceneFoldout;
+        public PrevClick Click;
+        public AufWindow Window;
+        public FindModeEnum FindFrom;
+    }
+}
--- a/Cleaner/Data/Globals/WindowData.cs.meta
+++ b/Cleaner/Data/Globals/WindowData.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 8481f043b2414c08a45957dcd6035fbe
+timeCreated: 1575305740
--- a/Cleaner/Data/InSceneResult.cs
+++ b/Cleaner/Data/InSceneResult.cs
@ -0,0 +1,11 @@
+using Leopotam.Ecs;
+
+namespace Asset_Cleaner {
+    class InSceneResult : IEcsAutoReset {
+        public string ScenePath;
+
+        public void Reset() {
+            ScenePath = default;
+        }
+    }
+}
--- a/Cleaner/Data/InSceneResult.cs.meta
+++ b/Cleaner/Data/InSceneResult.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 013577ffef1140109e8367f2a5f75fa6
+timeCreated: 1577269723
--- a/Cleaner/Data/PrevClick.cs
+++ b/Cleaner/Data/PrevClick.cs
@ -0,0 +1,18 @@
+using UnityEngine;
+
+namespace Asset_Cleaner {
+    public struct PrevClick {
+        const float DoubleClickTime = 0.5f;
+        Object _target;
+        float _timeClicked;
+
+        public PrevClick(Object target) {
+            _target = target;
+            _timeClicked = Time.realtimeSinceStartup;
+        }
+
+        public bool IsDoubleClick(Object o) {
+            return _target == o && Time.realtimeSinceStartup - _timeClicked < DoubleClickTime;
+        }
+    }
+}
--- a/Cleaner/Data/PrevClick.cs.meta
+++ b/Cleaner/Data/PrevClick.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 31c0f204d1b044caaa02a0726f11a270
+timeCreated: 1576087327
--- a/Cleaner/Data/Result.cs
+++ b/Cleaner/Data/Result.cs
@ -0,0 +1,19 @@
+using Leopotam.Ecs;
+using UnityEngine;
+using Object = UnityEngine.Object;
+
+namespace Asset_Cleaner {
+    class Result : IEcsAutoReset {
+        public string FilePath;
+        public Object File;
+        public Object MainFile;
+        public GameObject RootGo;
+
+        public void Reset() {
+            FilePath = default;
+            File = default;
+            MainFile = default;
+            RootGo = default;
+        }
+    }
+}
--- a/Cleaner/Data/Result.cs.meta
+++ b/Cleaner/Data/Result.cs.meta
@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 46f4fd24243adc749b377209f744d628
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Cleaner/Data/SceneDetails.cs
+++ b/Cleaner/Data/SceneDetails.cs
@ -0,0 +1,20 @@
+using Leopotam.Ecs;
+using UnityEngine.SceneManagement;
+
+namespace Asset_Cleaner {
+    class SceneDetails : IEcsAutoReset {
+        public string Path;
+        public Scene Scene;
+        public bool SearchRequested;
+        public bool SearchDone;
+        public bool WasOpened;
+
+        public void Reset() {
+            Path = default;
+            Scene = default;
+            SearchRequested = default;
+            SearchDone = default;
+            WasOpened = default;
+        }
+    }
+}
--- a/Cleaner/Data/SceneDetails.cs.meta
+++ b/Cleaner/Data/SceneDetails.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 14749f86c2c14febb592442508f8c23a
+timeCreated: 1577266613
--- a/Cleaner/Data/SceneResult.cs
+++ b/Cleaner/Data/SceneResult.cs
@ -0,0 +1,11 @@
+using Leopotam.Ecs;
+
+namespace Asset_Cleaner {
+    class SceneResult : IEcsAutoReset {
+        public string PathNicified;
+
+        public void Reset() {
+            PathNicified = default;
+        }
+    }
+}
--- a/Cleaner/Data/SceneResult.cs.meta
+++ b/Cleaner/Data/SceneResult.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 338e9e86c9274f91808429753a912d4b
+timeCreated: 1576083610
--- a/Cleaner/Data/SearchArg.cs
+++ b/Cleaner/Data/SearchArg.cs
@ -0,0 +1,26 @@
+using System.Collections.Generic;
+using Leopotam.Ecs;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+namespace Asset_Cleaner {
+    class SearchArg : IEcsAutoReset {
+        public Object Target;
+        public Object Main;
+        public string FilePath;
+        public Option<Object[]> SubAssets;
+        public Scene Scene;
+        public List<string> UnusedAssetsFiltered;
+        public List<string> UnusedScenesFiltered;
+
+        public void Reset() {
+            UnusedAssetsFiltered = default;
+            UnusedScenesFiltered = default;
+            Target = default;
+            Main = default;
+            SubAssets = default;
+            Scene = default;
+            FilePath = default;
+        }
+    }
+}
--- a/Cleaner/Data/SearchArg.cs.meta
+++ b/Cleaner/Data/SearchArg.cs.meta
@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 4a6b25ca9296c9e41affadc9ccecb1f1
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Cleaner/Data/SearchResultGui.cs
+++ b/Cleaner/Data/SearchResultGui.cs
@ -0,0 +1,32 @@
+using System.Collections.Generic;
+using Leopotam.Ecs;
+using UnityEditor;
+using UnityEngine;
+
+namespace Asset_Cleaner {
+    class SearchResultGui : IEcsAutoReset {
+        public SerializedObject SerializedObject;
+        public List<PropertyData> Properties;
+        public GUIContent Label;
+        public string TransformPath;
+
+        public void Reset() {
+            SerializedObject?.Dispose();
+            SerializedObject = default;
+
+            if (Properties != default)
+                foreach (var propertyData in Properties) {
+                    propertyData.Property.Dispose();
+                }
+
+            Properties = default;
+            Label = default;
+            TransformPath = default;
+        }
+
+        public class PropertyData {
+            public SerializedProperty Property;
+            public GUIContent Content;
+        }
+    }
+}
--- a/Cleaner/Data/SearchResultGui.cs.meta
+++ b/Cleaner/Data/SearchResultGui.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 14f26ff078c04c5685fdbb3ec3f92382
+timeCreated: 1576168925
--- a/Cleaner/Data/SelectionChanged.cs
+++ b/Cleaner/Data/SelectionChanged.cs
@ -0,0 +1,17 @@
+using Leopotam.Ecs;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+namespace Asset_Cleaner {
+    class SelectionChanged : IEcsAutoReset {
+        public Object Target;
+        public Scene Scene;
+        public FindModeEnum From;
+
+        public void Reset() {
+            Target = default;
+            Scene = default;
+            From = default;
+        }
+    }
+}
--- a/Cleaner/Data/SelectionChanged.cs.meta
+++ b/Cleaner/Data/SelectionChanged.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 1d0dc4d007bb4ebbbeea6626197d17b9
+timeCreated: 1575365553
--- a/Cleaner/Data/SelectionEntry.cs
+++ b/Cleaner/Data/SelectionEntry.cs
@ -0,0 +1,31 @@
+using System;
+using UnityEditor;
+using Object = UnityEngine.Object;
+
+namespace Asset_Cleaner {
+    [Serializable]
+    class SelectionEntry {
+        public bool IsGuids;
+        public string[] Guids;
+
+        public Object[] SceneObjects;
+
+        public bool Valid() {
+            if (IsGuids) {
+                foreach (var guid in Guids) {
+                    var path = AssetDatabase.GUIDToAssetPath(guid);
+                    if (!string.IsNullOrEmpty(path))
+                        return true;
+                }
+
+                return false;
+            }
+
+            foreach (var sceneObject in SceneObjects)
+                if (sceneObject)
+                    return true;
+
+            return false;
+        }
+    }
+}
--- a/Cleaner/Data/SelectionEntry.cs.meta
+++ b/Cleaner/Data/SelectionEntry.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 2b4476be23474ea4b20262c0ee59983c
+timeCreated: 1596139978
--- a/Cleaner/IgnoreTypes.cs
+++ b/Cleaner/IgnoreTypes.cs
@ -0,0 +1,34 @@
+using System;
+using UnityEditor;
+using UnityEditorInternal;
+using UnityEngine;
+
+namespace Asset_Cleaner {
+    static class IgnoreTypes {
+        public static bool Check(string path, out Type type) {
+            type = AssetDatabase.GetMainAssetTypeAtPath(path);
+            if (type == null) return false;
+            var conf = Globals<Config>.Value;
+
+            if (type.IsAssignableFromInverse(typeof(MonoScript))) return true;
+            if (type.IsAssignableFromInverse(typeof(DefaultAsset))) return true;
+            if (conf.IgnoreScriptable && type.IsAssignableFromInverse(typeof(ScriptableObject))) return true;
+
+            if (type.IsAssignableFromInverse(typeof(Shader))) return true;
+            if (type.IsAssignableFromInverse(typeof(ComputeShader))) return true;
+            if (type.IsAssignableFromInverse(typeof(ShaderVariantCollection))) return true;
+#if UNITY_2019_3_OR_NEWER
+			if (type.IsAssignableFromInverse(typeof(UnityEngine.Experimental.Rendering.RayTracingShader))) return true; // todo: track of Experimental namespace
+#endif
+
+            if (type.IsAssignableFromInverse(typeof(TextAsset))) return true;
+            if (type.IsAssignableFromInverse(typeof(AssemblyDefinitionAsset))) return true;
+
+            if (type.IsAssignableFromInverse(typeof(UnityEngine.U2D.SpriteAtlas))) return true;
+
+            if (conf.IgnoreMaterial && type.IsAssignableFromInverse(typeof(Material))) return true;
+
+            return false;
+        }
+    }
+}
--- a/Cleaner/IgnoreTypes.cs.meta
+++ b/Cleaner/IgnoreTypes.cs.meta
@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 34f1d98d6e464e5ebee0df9de721af39
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Cleaner/Systems.meta
+++ b/Cleaner/Systems.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 4b15d89b453047218955641734d4ec9e
+timeCreated: 1596213484
--- a/Cleaner/Systems/External.meta
+++ b/Cleaner/Systems/External.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: cbedea52d931409a8b62256873637225
+timeCreated: 1596214557
--- a/Cleaner/Systems/External/AufWindow.cs
+++ b/Cleaner/Systems/External/AufWindow.cs
@ -0,0 +1,94 @@
+using System.Diagnostics;
+using UnityEditor;
+using UnityEngine;
+using Debug = UnityEngine.Debug;
+
+namespace Asset_Cleaner {
+    class AufWindow : EditorWindow {
+        [SerializeField] PersistentUndoRedoState _persistentUndo;
+
+        [MenuItem("Window/- Asset Cleaner %L")]
+        static void OpenActiveWindow() {
+            GetWindow<AufWindow>();
+        }
+
+        // restore window state after recompilation
+        void OnEnable() {
+            var wd = Globals<WindowData>.Value = new WindowData();
+            wd.Window = this;
+
+            var firstTime = _persistentUndo == null;
+            Globals<PersistentUndoRedoState>.Value = _persistentUndo ?? new PersistentUndoRedoState();
+            Globals<BacklinkStore>.Value = new BacklinkStore();
+            var config = Globals<Config>.Value = new Config();
+            PersistenceUtils.Load(ref config);
+
+            if (firstTime || !config.RebuildCacheOnDemand)
+                Globals<BacklinkStore>.Value.Init();
+
+            EditorApplication.update += Upd;
+            EditorApplication.projectWindowItemOnGUI += ProjectViewGui.OnProjectWindowItemOnGui;
+
+            AufCtx.TryInitWorld();
+            
+            // need to close window in case of Asset Cleaner uninstalled
+            if (!CleanerStyleAsset.Style.TryFindSelf(out wd.Style)) 
+                ForceClose();
+        }
+
+        void OnGUI() {
+            var store = Globals<BacklinkStore>.Value;
+            if (!store.Initialized) {
+                // prevent further window GUI rendering
+                if (!GUILayout.Button("Initialize Cache")) return;
+                var stopwatch = new Stopwatch();
+                stopwatch.Start();
+                store.Init();
+                stopwatch.Stop();
+                Globals<Config>.Value.InitializationTime = $"Initialized in {stopwatch.Elapsed.TotalSeconds:N} s";
+                AufCtx.World.NewEntityWith(out RequestRepaintEvt _);
+            }
+
+            AufCtx.OnGuiGroup.Run();
+        }
+
+        static void Upd() {
+            if (AufCtx.World == null) {
+                AufCtx.DestroyWorld();
+                return;
+            }
+
+            if (!Globals<BacklinkStore>.Value.Initialized) return;
+            AufCtx.UpdateGroup.Run();
+        }
+
+        bool _closing;
+
+        void ForceClose() {
+            if (_closing) return;
+            _closing = true;
+            Close();
+            EditorWindow.DestroyImmediate(this);
+        }
+        
+        void OnDisable() {
+            if (AufCtx.Destroyed) return;
+            _persistentUndo = Globals<PersistentUndoRedoState>.Value;
+
+            AufCtx.UpdateGroup.Destroy();
+            AufCtx.OnGuiGroup.Destroy();
+            AufCtx.DestroyWorld();
+
+            Globals<Config>.Value = default;
+            Globals<PersistentUndoRedoState>.Value = default;
+            Globals<WindowData>.Value = default;
+
+            EditorApplication.update -= Upd;
+            EditorApplication.projectWindowItemOnGUI -= ProjectViewGui.OnProjectWindowItemOnGui;
+            
+            // need to close window in case of Asset Cleaner uninstalled
+            if (!CleanerStyleAsset.Style.TryFindSelf(out _)) 
+                ForceClose();
+        }
+    }
+}
--- a/Cleaner/Systems/External/AufWindow.cs.meta
+++ b/Cleaner/Systems/External/AufWindow.cs.meta
@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 44ebd7bbb2bb41b4ba0187901e8d583f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Cleaner/Systems/External/ProcessAllAssets.cs
+++ b/Cleaner/Systems/External/ProcessAllAssets.cs
@ -0,0 +1,23 @@
+using UnityEditor;
+
+namespace Asset_Cleaner {
+    class ProcessAllAssets : AssetPostprocessor {
+        static void OnPostprocessAllAssets(string[] importedAssets, string[] deletedAssets, string[] movedAssets, string[] movedFromAssetPaths) {
+            if (!AufCtx.InitStarted) return;
+            if (!Globals<BacklinkStore>.Value.Initialized) return;
+
+            var store = Globals<BacklinkStore>.Value;
+            var length = movedAssets.Length;
+            for (var i = 0; i < length; i++)
+                store.Replace(movedFromAssetPaths[i], movedAssets[i]);
+
+            foreach (var path in deletedAssets)
+                store.Remove(path);
+
+            foreach (var path in importedAssets)
+                store.RebuildFor(path, true);
+
+            store.UpdateUnusedAssets();
+        }
+    }
+}
--- a/Cleaner/Systems/External/ProcessAllAssets.cs.meta
+++ b/Cleaner/Systems/External/ProcessAllAssets.cs.meta
@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 17c1f845fa88d38448c4cf65e9745f30
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Cleaner/Systems/External/ProjectViewGui.cs
+++ b/Cleaner/Systems/External/ProjectViewGui.cs
@ -0,0 +1,47 @@
+using UnityEditor;
+using UnityEngine;
+
+namespace Asset_Cleaner {
+    static class ProjectViewGui {
+        static CleanerStyleAsset.Style _style = Globals<WindowData>.Value.Style;
+
+        public static void OnProjectWindowItemOnGui(string guid, Rect rect) {
+            if (!Globals<Config>.Value.MarkRed) return;
+
+            var store = Globals<BacklinkStore>.Value;
+            if (!store.Initialized) return;
+
+            var path = AssetDatabase.GUIDToAssetPath(guid);
+            ShowRowQuantity(rect, path, store);
+
+            long size = 0;
+            var _ = store.UnusedFiles.TryGetValue(path, out size) || store.UnusedScenes.TryGetValue(path, out size);
+
+            if (SearchUtils.IsUnused(path)) {
+                var buf = GUI.color;
+                {
+                    GUI.color = _style.RedHighlight;
+                    GUI.Box(rect, string.Empty);
+                }
+                GUI.color = buf;
+                GUI.Label(rect, CommonUtils.BytesToString(size), _style.ProjectViewCounterLabel);
+            }
+        }
+
+
+        static void ShowRowQuantity(Rect rect, string path, BacklinkStore backlinkStore) {
+            if (!AssetDatabase.IsValidFolder(path))
+                return;
+
+            backlinkStore.FoldersWithQty.TryGetValue(path, out var folderWithQty);
+
+            var cntFiles = folderWithQty?.UnusedFilesQty ?? 0;
+            var cntScenes = folderWithQty?.UnusedScenesQty ?? 0;
+            long size = folderWithQty?.UnusedSize ?? 0;
+
+            if (cntFiles == 0 && cntScenes == 0) return;
+            var countStr = cntFiles + cntScenes > 0 ? $"{cntFiles} | {cntScenes} ({CommonUtils.BytesToString(size)})" : "";
+            GUI.Label(rect, countStr, _style.ProjectViewCounterLabel);
+        }
+    }
+}
--- a/Cleaner/Systems/External/ProjectViewGui.cs.meta
+++ b/Cleaner/Systems/External/ProjectViewGui.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: a17718cc645348b0bc4ed6d7e514ab30
+timeCreated: 1589032770
--- a/Cleaner/Systems/SysProcessSearch.cs
+++ b/Cleaner/Systems/SysProcessSearch.cs
@ -0,0 +1,56 @@
+using System;
+using Leopotam.Ecs;
+using UnityEngine;
+using static Asset_Cleaner.AufCtx;
+
+namespace Asset_Cleaner {
+    class SysProcessSearch : IEcsRunSystem {
+        EcsFilter<SelectionChanged> _from = null;
+
+        EcsFilter<Result, SearchResultGui, InSceneResult> SceneResultRows = null;
+        EcsFilter<SceneResult, SceneDetails> ScenePaths = null;
+        EcsFilter<SearchArg>.Exclude<InSceneResult> SearchArgMain = null;
+        EcsFilter<Result, SearchResultGui, FileResultTag> FileResultRows = null;
+
+        public void Run() {
+            if (_from.IsEmpty())
+                return;
+
+            SearchArgMain.AllDestroy();
+            ScenePaths.AllDestroy();
+            FileResultRows.AllDestroy();
+            SceneResultRows.AllDestroy();
+
+            var wd = Globals<WindowData>.Value;
+            if (wd.Window)
+                wd.Window.Repaint();
+
+            foreach (var i in _from.Out(out var get1, out _)) {
+                var t1 = get1[i];
+                if (!t1.Target) continue;
+                wd.FindFrom = t1.From;
+
+                try {
+                    switch (t1.From) {
+                        case FindModeEnum.Scene:
+                            World.NewEntityWith(out SearchArg st);
+                            SearchUtils.Init(st, t1.Target, t1.Scene);
+                            SearchUtils.InScene(st, t1.Scene);
+                            break;
+                        case FindModeEnum.File:
+                            World.NewEntityWith(out SearchArg arg);
+                            SearchUtils.Init(arg, t1.Target);
+                            SearchUtils.FilesThatReference(arg);
+                            SearchUtils.ScenesThatContain(t1.Target);
+                            break;
+                    }
+                }
+                catch (Exception e) {
+                    Debug.LogException(e);
+                }
+            }
+
+            _from.AllUnset<SelectionChanged>();
+        }
+    }
+}
--- a/Cleaner/Systems/SysProcessSearch.cs.meta
+++ b/Cleaner/Systems/SysProcessSearch.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: afd561b0c1384bcc82976f2624afa895
+timeCreated: 1577287503
--- a/Cleaner/Systems/SysRepaintWindow.cs
+++ b/Cleaner/Systems/SysRepaintWindow.cs
@ -0,0 +1,30 @@
+using Leopotam.Ecs;
+using UnityEditor;
+using UnityEditorInternal;
+using UnityEngine;
+
+namespace Asset_Cleaner {
+    class RequestRepaintEvt { }
+
+    class SysRepaintWindow : IEcsRunSystem, IEcsInitSystem {
+        EcsFilter<RequestRepaintEvt> Repaint = null;
+
+        public void Init() {
+            var wd = Globals<WindowData>.Value;
+            wd.SceneFoldout = new GUIContent(AssetPreview.GetMiniTypeThumbnail(typeof(SceneAsset)));
+            wd.ExpandScenes = true;
+            wd.ExpandFiles = true;
+            wd.ScrollPos = Vector2.zero;
+            wd.Window.titleContent = new GUIContent("Asset Cleaner v1.0");
+        }
+
+        public void Run() {
+            var wd = Globals<WindowData>.Value;
+
+            if (Repaint.IsEmpty()) return;
+            wd.Window.Repaint();
+            InternalEditorUtility.RepaintAllViews();
+            Repaint.AllDestroy();
+        }
+    }
+}
--- a/Cleaner/Systems/SysRepaintWindow.cs.meta
+++ b/Cleaner/Systems/SysRepaintWindow.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 673a2486762b4e3da784f1657b90bb93
+timeCreated: 1577288020
--- a/Cleaner/Systems/SysSceneCleanup.cs
+++ b/Cleaner/Systems/SysSceneCleanup.cs
@ -0,0 +1,44 @@
+using Leopotam.Ecs;
+using UnityEditor;
+using UnityEditor.SceneManagement;
+using UnityEngine.SceneManagement;
+
+namespace Asset_Cleaner {
+    class SceneToClose : IEcsAutoReset {
+        public Scene Scene;
+        public int SelectionId;
+        public bool ForceClose;
+
+        public void Reset() {
+            ForceClose = default;
+            Scene = default;
+            SelectionId = default;
+        }
+    }
+
+    class SysSceneCleanup : IEcsRunSystem, IEcsDestroySystem {
+        EcsFilter<SceneToClose> ScenesToClose = default;
+
+        public void Run() {
+            if (ScenesToClose.IsEmpty()) return;
+
+            var selectionId = Globals<PersistentUndoRedoState>.Value.Id;
+
+            foreach (var i in ScenesToClose.Out(out var g1, out var entities)) {
+                var s = g1[i].Scene;
+                if (g1[i].SelectionId == selectionId && !g1[i].ForceClose) continue;
+                if (Selection.activeGameObject && Selection.activeGameObject.scene == s) continue;
+                if (s.isLoaded) EditorSceneManager.CloseScene(s, removeScene: true);
+                entities[i].Destroy();
+            }
+        }
+
+        // close scenes on window close
+        public void Destroy() {
+            foreach (var i in ScenesToClose.Out(out var g1, out _)) {
+                var s = g1[i].Scene;
+                if (s.isLoaded) EditorSceneManager.CloseScene(s, removeScene: true);
+            }
+        }
+    }
+}
--- a/Cleaner/Systems/SysSceneCleanup.cs.meta
+++ b/Cleaner/Systems/SysSceneCleanup.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: d42cae4aa3ff4500948ddd623a270120
+timeCreated: 1596142629
--- a/Cleaner/Systems/SysUndoRedoSelection.cs
+++ b/Cleaner/Systems/SysUndoRedoSelection.cs
@ -0,0 +1,190 @@
+using System.Linq;
+using System.Runtime.InteropServices;
+using Leopotam.Ecs;
+using UnityEditor;
+using UnityEngine;
+using static Asset_Cleaner.AufCtx;
+
+namespace Asset_Cleaner {
+    class CleanupPrevArg { }
+
+    class UndoEvt { }
+
+    class RedoEvt { }
+
+    class SysUndoRedoSelection : IEcsRunSystem, IEcsInitSystem, IEcsDestroySystem {
+        EcsFilter<UndoEvt> UndoEvt = default;
+        EcsFilter<RedoEvt> RedoEvt = default;
+
+        bool _preventHistoryInsert;
+        bool _preventSelectionSet;
+
+        public void Init() {
+            Undo.undoRedoPerformed += OnUndoRedoPerformed;
+            Selection.selectionChanged += OnSelectionChanged;
+            Globals<UndoRedoState>.Value = new UndoRedoState();
+            if (Globals<PersistentUndoRedoState>.Value.History.Count > 0)
+                _preventHistoryInsert = true;
+            OnSelectionChanged(); //init selection
+        }
+
+        public void Destroy() {
+            Undo.undoRedoPerformed -= OnUndoRedoPerformed;
+            Selection.selectionChanged -= OnSelectionChanged;
+            Globals<UndoRedoState>.Value = default;
+        }
+
+        public void Run() {
+            MouseInput();
+
+            if (UndoEvt.IsEmpty() && RedoEvt.IsEmpty()) return;
+            Counters(undo: !UndoEvt.IsEmpty(), redo: !RedoEvt.IsEmpty(), false);
+            _preventHistoryInsert = true;
+            if (!_preventSelectionSet) {
+                (var history, var id) = Globals<PersistentUndoRedoState>.Value;
+                SelectionEntry entry = history[id];
+                if (entry.Valid())
+                    Selection.objects = entry.IsGuids
+                        ? entry.Guids.Select(AssetDatabase.GUIDToAssetPath).Select(AssetDatabase.LoadAssetAtPath<Object>).Where(obj => obj).ToArray()
+                        : entry.SceneObjects;
+            }
+
+            _preventSelectionSet = false;
+
+            UndoEvt.AllDestroy();
+            RedoEvt.AllDestroy();
+        }
+
+
+        static void Counters(bool undo, bool redo, bool insertToHistory) {
+            var state = Globals<PersistentUndoRedoState>.Value;
+            World.NewEntityWith(out RequestRepaintEvt _);
+
+            const int MinId = 0;
+            if (insertToHistory) {
+                var entry = new SelectionEntry();
+
+                var count = state.History.Count - 1 - state.Id;
+                if (count > 0)
+                    state.History.RemoveRange(state.Id + 1, count);
+
+                state.History.Add(entry);
+                state.Id = MaxId();
+
+                if (Selection.assetGUIDs.Length > 0) {
+                    entry.IsGuids = true;
+                    entry.Guids = Selection.assetGUIDs;
+                }
+                else {
+                    entry.SceneObjects = Selection.objects;
+                }
+            }
+
+            if (undo) {
+                // loop to skip invalid 
+                while (true) {
+                    state.Id -= 1;
+                    if (state.Id < MinId) break;
+                    if (state.History[state.Id].Valid()) break;
+                }
+            }
+
+            if (redo) {
+                // loop to skip invalid
+                while (true) {
+                    state.Id += 1;
+                    if (state.Id > MaxId()) break;
+                    if (state.History[state.Id].Valid()) break;
+                }
+            }
+
+            state.Id = Mathf.Clamp(state.Id, MinId, MaxId());
+
+            var undoRedoState = Globals<UndoRedoState>.Value;
+            undoRedoState.UndoEnabled = state.Id != MinId;
+            undoRedoState.RedoEnabled = state.Id != MaxId();
+
+            int MaxId() => Mathf.Max(0, state.History.Count - 1);
+        }
+
+        void OnSelectionChanged() {
+            World.NewEntityWith(out RequestRepaintEvt _);
+            if (Globals<Config>.Value.Locked) return;
+            Counters(undo: false, redo: false, insertToHistory: !_preventHistoryInsert);
+            _preventHistoryInsert = false;
+
+            World.NewEntityWith(out SelectionChanged comp);
+            World.NewEntityWith(out CleanupPrevArg _);
+            var go = Selection.activeGameObject;
+            if (go && go.scene.IsValid()) {
+                comp.From = FindModeEnum.Scene;
+                comp.Target = go;
+                comp.Scene = go.scene;
+            }
+            else {
+                var guids = Selection.assetGUIDs;
+                // comp.Guids = Selection.assetGUIDs;
+                bool any = guids != null && guids.Length > 0;
+                if (any) {
+                    comp.From = FindModeEnum.File;
+                    var path = AssetDatabase.GUIDToAssetPath(guids[0]);
+                    comp.Target = AssetDatabase.LoadAssetAtPath<Object>(path);
+                }
+                else {
+                    comp.From = FindModeEnum.None;
+                    comp.Target = null;
+                }
+            }
+        }
+
+        // prevents selection history flooding
+        void OnUndoRedoPerformed() {
+            // below is a hackish way to catch Undo/Redo from editor
+            if (!Undo.GetCurrentGroupName().Equals("Selection Change")) return;
+            var evt = Event.current;
+            if (evt == null) return;
+            if (evt.rawType != EventType.KeyDown) return;
+
+            switch (evt.keyCode) {
+                case KeyCode.Z:
+                    World.NewEntityWith(out UndoEvt _);
+                    _preventSelectionSet = true; // prevent manual Selection set  
+                    break;
+                case KeyCode.Y:
+                    World.NewEntityWith(out RedoEvt _);
+                    _preventSelectionSet = true;
+                    break;
+            }
+        }
+
+        void MouseInput() {
+            if (_nextClick > EditorApplication.timeSinceStartup) return;
+
+            var any = false;
+            if (Pressed(0x5)) {
+                World.NewEntityWith(out UndoEvt _);
+                any = true;
+            }
+
+            if (Pressed(0x6)) {
+                World.NewEntityWith(out RedoEvt _);
+                any = true;
+            }
+
+            if (any)
+                _nextClick = EditorApplication.timeSinceStartup + 0.25;
+        }
+
+#if UNITY_EDITOR_WIN
+        [DllImport("USER32.dll")]
+        static extern short GetKeyState(int keycode);
+#else
+        static short GetKeyState(int keycode) => 0;
+#endif
+
+        double _nextClick;
+
+        // 5 back, 6 fw
+        static bool Pressed(int keyCode) => (GetKeyState(keyCode) & 0x100) != 0;
+    }
+}
--- a/Cleaner/Systems/SysUndoRedoSelection.cs.meta
+++ b/Cleaner/Systems/SysUndoRedoSelection.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 6e6a2f49ce174cabbc560ea8e3e9975c
+timeCreated: 1596008857
--- a/Cleaner/Systems/SysWindowGui.cs
+++ b/Cleaner/Systems/SysWindowGui.cs
@ -0,0 +1,970 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using Leopotam.Ecs;
+using UnityEditor;
+using UnityEditor.SceneManagement;
+using UnityEditorInternal;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+using Object = UnityEngine.Object;
+
+namespace Asset_Cleaner {
+    class FileResultTag { }
+
+    enum TargetTypeEnum {
+        File = 0,
+        Directory = 1,
+        Scene = 2,
+        ObjectInScene = 3,
+        ObjectInStage = 4
+    }
+
+    class SysWindowGui : IEcsRunSystem, IEcsInitSystem {
+        EcsFilter<Result, SearchResultGui, InSceneResult> SceneResultRows = null;
+        EcsFilter<SceneResult, SceneDetails> ScenePaths = null;
+        EcsFilter<SearchArg>.Exclude<InSceneResult> SearchArgMain = null;
+        EcsFilter<Result, SearchResultGui, FileResultTag> FileResultRows = null;
+
+        public void Init() {
+            BacklinkStoreDirty(true);
+            VisualSettingDirty(true);
+        }
+
+        public void Run() {
+            var windowData = Globals<WindowData>.Value;
+
+            _toolbarSelection = GUILayout.Toolbar(_toolbarSelection, _toolbarStrings, GUILayout.ExpandWidth(false));
+            var conf = Globals<Config>.Value;
+            switch (_toolbarSelection) {
+                case 0: {
+                    ShowTabMain(conf, windowData);
+                    break;
+                }
+                case 1: {
+                    ShowTabSettings(conf);
+                    break;
+                }
+            }
+        }
+
+        string[] _toolbarStrings = {"Main", "Settings"};
+
+        const int _progressBarShowFromLevel = 10;
+        int _toolbarSelection = 0;
+
+        int _settingIgnoredPathsHash1;
+
+        bool BacklinkStoreDirty(bool set) {
+            var res = Hash() != _settingIgnoredPathsHash1;
+            if (set) _settingIgnoredPathsHash1 = Hash();
+            return res;
+
+            int Hash() {
+                var conf = Globals<Config>.Value;
+                return DirtyUtils.HashCode(conf.IgnorePathContainsCombined,
+                    conf.IgnoreMaterial,
+                    conf.IgnoreScriptable);
+            }
+        }
+
+        int _settingCodeHash1;
+
+        bool VisualSettingDirty(bool set) {
+            var res = Hash() != _settingCodeHash1;
+            if (set) _settingCodeHash1 = Hash();
+            return res;
+
+            int Hash() {
+                var conf = Globals<Config>.Value;
+                return DirtyUtils.HashCode(
+                    conf.MarkRed,
+                    conf.ShowInfoBox,
+                    conf.RebuildCacheOnDemand);
+            }
+        }
+
+        void ShowTabSettings(Config conf) {
+            using (new EditorGUILayout.VerticalScope()) {
+                EditorGUILayout.Space();
+
+                var enabled = GUI.enabled;
+                GUI.enabled = true;
+
+
+                using (new EditorGUILayout.VerticalScope()) {
+                    conf.MarkRed = GUILayout.Toggle(conf.MarkRed, "Display counters and red overlay in Project View");
+                    conf.ShowInfoBox = GUILayout.Toggle(conf.ShowInfoBox, "Help suggestions");
+                    conf.RebuildCacheOnDemand = GUILayout.Toggle(conf.RebuildCacheOnDemand, "Rebuild cache on demand (when scripts are updated often)");
+                    EditorGUILayout.Space();
+                    conf.IgnoreMaterial = GUILayout.Toggle(conf.IgnoreMaterial, "Ignore Materials");
+                    conf.IgnoreScriptable = GUILayout.Toggle(conf.IgnoreScriptable, "Ignore ScriptableObjects");
+                }
+
+                EditorGUILayout.Space();
+
+                GUI.enabled = enabled;
+
+                EditorGUILayout.LabelField("Ignore Path(s) contains:");
+
+                conf.IgnorePathContainsCombined = GUILayout.TextArea(conf.IgnorePathContainsCombined);
+
+                using (new EditorGUILayout.HorizontalScope(GUILayout.ExpandWidth(false))) {
+                    EditorGUILayout.Space();
+
+                    var previous = GUI.enabled;
+
+                    GUI.enabled = BacklinkStoreDirty(false) || VisualSettingDirty(false);
+                    if (GUILayout.Button("Apply")) {
+                        conf.IgnorePathContains = conf.IgnorePathContainsCombined.Split(';')
+                            .Where(s => !string.IsNullOrWhiteSpace(s)).ToArray();
+                        Apply();
+                    }
+
+                    GUI.enabled = previous;
+
+                    var selectedGuids = Selection.assetGUIDs;
+                    var assetPaths = new List<string>();
+                    if (selectedGuids.Length > 0) {
+                        foreach (var guid in selectedGuids) {
+                            var realAssetPath = AssetDatabase.GUIDToAssetPath(guid);
+                            var obj = AssetDatabase.LoadAssetAtPath<Object>(realAssetPath);
+                            var assetPath = realAssetPath.Replace("Assets/", string.Empty);
+                            if (obj is DefaultAsset &&
+                                !conf.IgnorePathContains.Any(p => (StringComparer.Ordinal.Equals(p, assetPath)))) {
+                                assetPaths.Add(assetPath);
+                            }
+                        }
+                    }
+
+                    GUI.enabled = (assetPaths.Count > 0);
+                    var foldersList = string.Join(", ", assetPaths);
+                    if (GUILayout.Button("Add Selected Path")) {
+                        var choice = EditorUtility.DisplayDialog(
+                            title: "Asset Cleaner",
+                            message:
+                            $"Do you really want to add these folder(s) to ignored list: \"{foldersList}\"?",
+                            ok: "Ignore",
+                            cancel: "Cancel");
+                        if (choice) {
+                            conf.IgnorePathContainsCombined += $"{foldersList};";
+                            conf.IgnorePathContains = conf.IgnorePathContainsCombined.Split(';')
+                                .Where(s => !string.IsNullOrWhiteSpace(s)).ToArray();
+                            Apply();
+                        }
+                    }
+
+                    GUI.enabled = true;
+                    if (GUILayout.Button("Reset")) {
+                        var choice = EditorUtility.DisplayDialog(
+                            title: "Asset Cleaner",
+                            message:
+                            $"Do you really want to reset to the factory settings?",
+                            ok: "Reset",
+                            cancel: "Cancel");
+                        if (choice) {
+                            var serializable = AufSerializableData.Default();
+                            AufSerializableData.OnDeserialize(in serializable, ref conf);
+                            Apply();
+                        }
+                    }
+
+                    GUI.enabled = previous;
+                }
+
+                EditorGUILayout.Space();
+                EditorGUILayout.LabelField(conf.InitializationTime);
+
+                var buf = GUI.enabled;
+                GUI.enabled = Selection.objects.Length > 0;
+                if (GUILayout.Button("Reserialize selected assets", GUILayout.ExpandWidth(false))) {
+                    var paths = Selection.objects.Select(AssetDatabase.GetAssetPath);
+                    AssetDatabase.ForceReserializeAssets(paths);
+                    EditorApplication.ExecuteMenuItem("File/Save Project");
+                    AssetDatabase.Refresh();
+                }
+
+                GUI.enabled = buf;
+
+                EditorGUILayout.Space();
+            }
+
+            void Apply() {
+                var rebuild = BacklinkStoreDirty(true);
+                VisualSettingDirty(true);
+                PersistenceUtils.Save(in conf);
+                AufCtx.World.NewEntityWith(out RequestRepaintEvt _);
+                if (rebuild)
+                    Globals<BacklinkStore>.Value.UpdateUnusedAssets();
+                InternalEditorUtility.RepaintAllViews();
+            }
+        }
+
+        void ShowTabMain(Config conf, WindowData windowData) {
+            var store = Globals<BacklinkStore>.Value;
+            EditorGUIUtility.labelWidth = windowData.Window.position.width * .7f;
+
+            int Hash() => DirtyUtils.HashCode(conf.Locked);
+            var active = SearchArgMain.Get1[0];
+            if (conf.Locked && (windowData.FindFrom == FindModeEnum.File &&
+                                (active == null || active.Main == null || !AssetDatabase.Contains(active.Main)))) {
+                conf.Locked = false;
+                AufCtx.World.NewEntityWith(out RequestRepaintEvt _);
+            }
+
+            var style = windowData.Style;
+            var hash = Hash();
+            if (hash != Hash()) {
+                PersistenceUtils.Save(in conf);
+                AufCtx.World.NewEntityWith(out RequestRepaintEvt _);
+            }
+
+            // if (Globals<WindowData>.Get() == null) return;
+            EditorGUILayout.Space();
+
+            SearchArg arg = default;
+            foreach (var i in SearchArgMain) {
+                arg = SearchArgMain.Get1[i];
+                if (arg != null && arg.Main != null) {
+                    break;
+                }
+            }
+
+            if (arg == default)
+                return;
+
+            var targetTypeEnum = GetTargetType(windowData, arg?.Main);
+            BacklinkStore.UnusedQty unusedQty = new BacklinkStore.UnusedQty(0, 0, 0);
+
+            using (new EditorGUILayout.HorizontalScope()) {
+                var enabledBuf = GUI.enabled;
+                var selectedGuids = Selection.assetGUIDs;
+
+                var undoRedoState = Globals<UndoRedoState>.Value;
+
+                GUI.enabled = selectedGuids != null && !conf.Locked && undoRedoState.UndoEnabled;
+                if (GUILayout.Button(style.ArrowL, style.ArrowBtn)) {
+                    AufCtx.World.NewEntityWith(out UndoEvt _);
+                }
+
+                GUI.enabled = selectedGuids != null && !conf.Locked && undoRedoState.RedoEnabled;
+                if (GUILayout.Button(style.ArrowR, style.ArrowBtn)) {
+                    AufCtx.World.NewEntityWith(out RedoEvt _);
+                }
+
+                GUI.enabled = enabledBuf;
+
+                if (conf.Locked) {
+                    if (GUILayout.Button(style.Lock, style.LockBtn)) {
+                        AufCtx.World.NewEntityWith(out SelectionChanged selectionChanged);
+                        conf.Locked = false;
+                        if (Selection.activeObject != arg.Target) {
+                            selectionChanged.From = FindModeEnum.Scene;
+                            selectionChanged.Scene = SceneManager.GetActiveScene();
+                            selectionChanged.Target = Selection.activeObject;
+                        }
+                        else if (Selection.assetGUIDs is string[] guids) {
+                            // todo show info box multiple selection is unsupported 
+                            if (guids.Length > 0) {
+                                var path = AssetDatabase.GUIDToAssetPath(guids[0]);
+                                selectionChanged.Target = AssetDatabase.LoadAssetAtPath<Object>(path);
+                                switch (Selection.selectionChanged.Target) {
+                                    case DefaultAsset _:
+                                        selectionChanged.From = FindModeEnum.File;
+                                        break;
+                                    case GameObject go when go.scene.isLoaded:
+                                        selectionChanged.From = FindModeEnum.Scene;
+                                        selectionChanged.Scene = SceneManager.GetActiveScene();
+                                        break;
+                                    default:
+                                        selectionChanged.From = FindModeEnum.File;
+                                        break;
+                                }
+                            }
+                            else if (Selection.activeObject is GameObject go && go.scene.isLoaded) {
+                                selectionChanged.From = FindModeEnum.Scene;
+                                selectionChanged.Target = Selection.activeObject;
+                                selectionChanged.Scene = SceneManager.GetActiveScene();
+                            }
+                        }
+                    }
+                }
+                else {
+                    var enabled = GUI.enabled;
+                    GUI.enabled = selectedGuids != null && selectedGuids.Length == 1;
+                    if (GUILayout.Button(style.Unlock, style.UnlockBtn)) {
+                        conf.Locked = true;
+                    }
+
+                    GUI.enabled = enabled;
+                }
+
+                unusedQty = ShowObjectName(store, windowData, targetTypeEnum, arg, selectedGuids);
+            }
+
+            bool isMultiSelect = Selection.assetGUIDs != null && Selection.assetGUIDs.Length > 1;
+
+            if (conf.ShowInfoBox) {
+                if (isMultiSelect && (unusedQty.UnusedFilesQty + unusedQty.UnusedScenesQty > 0)) {
+                    var msgUnusedFiles = (unusedQty.UnusedFilesQty > 0)
+                        ? $"unused files ({unusedQty.UnusedFilesQty}),"
+                        : "";
+                    var msgUnusedScenes = (unusedQty.UnusedScenesQty > 0)
+                        ? $"unused scenes ({unusedQty.UnusedScenesQty}),"
+                        : "";
+                    var msgMultiSelect = $"This multi-selection contains: " +
+                                         msgUnusedFiles + msgUnusedScenes +
+                                         $"\nYou could delete them pressing corresponding button to the right.";
+                    EditorGUILayout.HelpBox(msgMultiSelect, MessageType.Info);
+                }
+                else if (TryGetHelpInfo(arg, out var msg, out var msgType)) {
+                    EditorGUILayout.HelpBox(msg, msgType);
+                }
+            }
+
+            if (targetTypeEnum != TargetTypeEnum.Directory && !isMultiSelect) {
+                var windowData2 = Globals<WindowData>.Value;
+
+                EditorGUILayout.BeginVertical();
+                {
+                    windowData2.ScrollPos = EditorGUILayout.BeginScrollView(windowData2.ScrollPos);
+                    {
+                        RenderRows(windowData2); //TODO?
+                        EditorGUILayout.Space();
+                    }
+                    EditorGUILayout.EndScrollView();
+                }
+                EditorGUILayout.EndVertical();
+                EditorGUILayout.Space();
+            }
+        }
+
+
+        static bool TryGetHelpInfo(SearchArg arg, out string msg, out MessageType msgType) {
+            msgType = MessageType.Info;
+            if (arg == null) {
+                msg = default;
+                return false;
+            }
+
+            var path = arg.FilePath;
+            if (string.IsNullOrEmpty(path)) {
+                msg = default;
+                return false;
+            }
+
+            if (SearchUtils.IgnoredPaths(path, out var subPath)) {
+                msg = $"Paths containing '{subPath}' are ignored. You could add or remove it in Settings tab";
+                return true;
+            }
+
+            if (SearchUtils.IgnoredNonAssets(path) && !path.Eq("Assets")) {
+                msg = $"Asset is outside of Assets folder";
+                return true;
+            }
+
+            if (IgnoreTypes.Check(path, out var type)) {
+                if (AssetDatabase.IsValidFolder(path)) {
+                    var scenes = arg.UnusedScenesFiltered?.Count;
+                    var files = arg.UnusedAssetsFiltered?.Count;
+                    if (scenes == 0 && files == 0) {
+                        msg = default;
+                        return false;
+                    }
+
+                    var b = new StringBuilder();
+                    b.Append("This directory contains: ");
+                    var any = false;
+
+                    if (files > 0) {
+                        any = true;
+
+                        b.Append($"unused files ({files})");
+                    }
+
+                    if (scenes > 0) {
+                        if (any)
+                            b.Append(", ");
+                        b.Append($"unused scenes ({scenes})");
+                    }
+
+                    b.Append(
+                        ".\nYou could delete them pressing corresponding button to the right.\nIf you don't want it to be inspected, please add it to Ignore list in the Settings tab");
+                    msg = b.ToString();
+                    return true;
+                }
+
+                msg = $"Assets of type '{type.Name}' are ignored. Please contact support if you need to change it";
+                return true;
+            }
+
+            // if (Filters.ScenePaths.GetEntitiesCount() == 0 && Filters.FileResultRows.GetEntitiesCount() == 0) {
+            if (SearchUtils.IsUnused(path)) {
+                type = AssetDatabase.GetMainAssetTypeAtPath(path);
+                var name = type.IsAssignableFromInverse(typeof(SceneAsset)) ? "scene" : "file";
+                msg =
+                    $"This {name} has no explicit serialized usages and potentially could be removed. If you don't want it to be inspected, please add the containing folder to ignore list";
+                return true;
+            }
+
+            msgType = default;
+            msg = default;
+            return false;
+        }
+
+        static TargetTypeEnum GetTargetType(WindowData windowData1, Object obj) {
+            if (obj == null) return TargetTypeEnum.File;
+            var targetTypeEnum = TargetTypeEnum.Directory;
+            var path = AssetDatabase.GetAssetPath(obj);
+            switch (windowData1.FindFrom) {
+                case FindModeEnum.File when obj is DefaultAsset:
+                    targetTypeEnum = TargetTypeEnum.Directory;
+                    break;
+                case FindModeEnum.File when path.LastIndexOf(".unity", StringComparison.Ordinal) != -1:
+                    targetTypeEnum = TargetTypeEnum.Scene;
+                    break;
+                case FindModeEnum.File:
+                    targetTypeEnum = TargetTypeEnum.File;
+                    break;
+                case FindModeEnum.Scene:
+                    targetTypeEnum = TargetTypeEnum.ObjectInScene;
+                    break;
+                case FindModeEnum.Stage:
+                    targetTypeEnum = TargetTypeEnum.ObjectInStage;
+                    break;
+            }
+
+            return targetTypeEnum;
+        }
+
+        GUIContent _contentBuf = new GUIContent();
+        GUIContent _buf2 = new GUIContent();
+
+        BacklinkStore.UnusedQty ShowObjectName(BacklinkStore store, WindowData windowData, TargetTypeEnum targetTypeEnum, SearchArg arg, string[] selectedGuids) {
+            float TextWidth() {
+                _buf2.text = _contentBuf.text;
+                return 20f + GUI.skin.button.CalcSize(_buf2).x;
+            }
+
+            if (arg == null || arg.Main == null) return new BacklinkStore.UnusedQty();
+
+            bool isMultiSelect = selectedGuids != null && selectedGuids.Length > 1;
+
+            if (_contentBuf == null) {
+                _contentBuf = new GUIContent {tooltip = $"Click to ping"};
+            }
+
+            _contentBuf.image = isMultiSelect
+                ? windowData.Style.MultiSelect.image
+                : AssetPreview.GetMiniThumbnail(arg.Target);
+            _contentBuf.text = string.Empty;
+            _contentBuf.tooltip = string.Empty;
+
+            if (!isMultiSelect) {
+                switch (targetTypeEnum) {
+                    case TargetTypeEnum.Directory:
+                        if (!SearchArgMain.IsEmpty()) {
+                            _contentBuf.text = $"{arg.Main.name} (Folder)";
+                            if (GUILayout.Button(_contentBuf, windowData.Style.CurrentBtn,
+                                GUILayout.MinWidth(TextWidth()))) {
+                                EditorGUIUtility.PingObject(arg.Main);
+                            }
+
+                            if (AskDeleteUnusedFiles(arg, arg.UnusedAssetsFiltered, windowData))
+                                return new BacklinkStore.UnusedQty();
+
+                            if (AskDeleteUnusedScenes(arg, arg.UnusedScenesFiltered, windowData))
+                                return new BacklinkStore.UnusedQty();
+                        }
+
+                        break;
+                    case TargetTypeEnum.File:
+                        _contentBuf.text = $"{arg.Main.name} (File Asset)";
+                        if (GUILayout.Button(_contentBuf, windowData.Style.CurrentBtn,
+                            GUILayout.MinWidth(TextWidth()))) {
+                            EditorGUIUtility.PingObject(arg.Main);
+                        }
+
+                        bool hasUnusedFile = SearchUtils.IsUnused(arg.FilePath);
+                        var previous = GUI.enabled;
+                        GUI.enabled = hasUnusedFile;
+
+                        if (GUILayout.Button(windowData.Style.RemoveFile,
+                            windowData.Style.RemoveUnusedBtn)) {
+                            var choice = EditorUtility.DisplayDialog(
+                                title: "Asset Cleaner",
+                                message:
+                                $"Do you really want to remove file: \"{arg.Main.name}\"?",
+                                ok: "Remove",
+                                cancel: "Cancel");
+                            if (choice) {
+                                EditorApplication.ExecuteMenuItem("File/Save Project");
+                                DeleteWithMeta(arg.FilePath);
+                                AssetDatabase.Refresh();
+                                SearchUtils.Upd(arg);
+                            }
+                        }
+
+                        GUI.enabled = previous;
+
+                        break;
+                    case TargetTypeEnum.Scene:
+                        _contentBuf.text = $"{arg.Main.name} (Scene)";
+                        if (GUILayout.Button(_contentBuf, windowData.Style.CurrentBtn,
+                            GUILayout.MinWidth(TextWidth()))) {
+                            EditorGUIUtility.PingObject(arg.Main);
+                        }
+
+                        bool hasUnusedScene = SearchUtils.IsUnused(arg.FilePath);
+                        previous = GUI.enabled;
+                        GUI.enabled = hasUnusedScene;
+
+                        if (GUILayout.Button(windowData.Style.RemoveScene,
+                            windowData.Style.RemoveUnusedBtn)) {
+                            var choice = EditorUtility.DisplayDialog(
+                                title: "Asset Cleaner",
+                                message:
+                                $"Do you really want to remove scene: {arg.Main.name}?",
+                                ok: "Remove",
+                                cancel: "Cancel");
+                            if (choice) {
+                                EditorApplication.ExecuteMenuItem("File/Save Project");
+                                DeleteWithMeta(arg.FilePath);
+                                AssetDatabase.Refresh();
+                                SearchUtils.Upd(arg);
+                            }
+                        }
+
+                        GUI.enabled = previous;
+                        break;
+                    case TargetTypeEnum.ObjectInScene:
+                        _contentBuf.text = $"{arg.Main.name} (Object in Scene)";
+
+                        if (GUILayout.Button(_contentBuf, windowData.Style.CurrentBtn,
+                            GUILayout.MinWidth(TextWidth()))) {
+                            EditorGUIUtility.PingObject(arg.Main);
+                        }
+
+                        break;
+                    case TargetTypeEnum.ObjectInStage:
+                        _contentBuf.image = AssetPreview.GetMiniThumbnail(arg.Target);
+                        _contentBuf.text = $"{arg.Main.name} (Object in Staging)";
+
+                        if (GUILayout.Button(_contentBuf,
+                            windowData.Style.RemoveUnusedBtn)) {
+                            EditorGUIUtility.PingObject(arg.Main);
+                        }
+
+                        break;
+                    default:
+                        if (GUILayout.Button($"{arg.Main.name} (Unknown Object Type)",
+                            windowData.Style.RemoveUnusedBtn)) {
+                            EditorGUIUtility.PingObject(arg.Main);
+                        }
+
+                        break;
+                }
+            }
+            else {
+                var unusedAssets = new List<string>();
+                var unusedScenes = new List<string>();
+
+                foreach (var guid in selectedGuids) {
+                    var path = AssetDatabase.GUIDToAssetPath(guid);
+
+                    if (store.UnusedFiles.TryGetValue(path, out _))
+                        unusedAssets.Add(path);
+
+                    else if (store.UnusedScenes.TryGetValue(path, out _))
+                        unusedScenes.Add(path);
+
+                    if (store.FoldersWithQty.TryGetValue(path, out _)) {
+                        SearchArg searchArg = new SearchArg() {
+                            FilePath = path,
+                            Target = AssetDatabase.LoadAssetAtPath<DefaultAsset>(path),
+                            Main = AssetDatabase.LoadAssetAtPath<DefaultAsset>(path)
+                        };
+                        SearchUtils.Upd(searchArg);
+
+                        foreach (var unusedAssetPath in searchArg.UnusedAssetsFiltered)
+                            if (store.UnusedFiles.TryGetValue(unusedAssetPath, out _))
+                                unusedAssets.Add(unusedAssetPath);
+
+                        foreach (var unusedScenePath in searchArg.UnusedScenesFiltered)
+                            if (store.UnusedScenes.TryGetValue(unusedScenePath, out _))
+                                unusedScenes.Add(unusedScenePath);
+                    }
+                }
+
+                unusedAssets = unusedAssets.Distinct().ToList();
+                unusedScenes = unusedScenes.Distinct().ToList();
+
+                var assetSize = unusedAssets.Sum(CommonUtils.Size);
+                var sceneSize = unusedScenes.Sum(CommonUtils.Size);
+
+                _contentBuf.text =
+                    $"Assets: {unusedAssets.Count} ({CommonUtils.BytesToString(assetSize)}), Scenes: {unusedScenes.Count} ({CommonUtils.BytesToString(sceneSize)})";
+                ;
+
+                GUILayout.Button(_contentBuf, windowData.Style.CurrentBtn, GUILayout.MinWidth(TextWidth()));
+
+                if (AskDeleteUnusedFiles(arg, unusedAssets, windowData))
+                    return new BacklinkStore.UnusedQty();
+
+                if (AskDeleteUnusedScenes(arg, unusedScenes, windowData))
+                    return new BacklinkStore.UnusedQty();
+
+                return new BacklinkStore.UnusedQty(unusedAssets.Count, unusedScenes.Count, assetSize + sceneSize);
+            }
+
+            return new BacklinkStore.UnusedQty();
+        }
+
+        static bool AskDeleteUnusedFiles(SearchArg arg, List<string> unusedAssets, WindowData windowData) {
+            if (arg == null || unusedAssets == null) return false;
+            var hasUnusedAssets = unusedAssets.Count > 0;
+            var previous = GUI.enabled;
+            GUI.enabled = hasUnusedAssets;
+
+            var guiContentRemoveAssets = windowData.Style.RemoveFile;
+
+            if (GUILayout.Button(guiContentRemoveAssets,
+                windowData.Style.RemoveUnusedBtn)) {
+                var choice = EditorUtility.DisplayDialog(
+                    title: "Asset Cleaner",
+                    message:
+                    $"Do you really want to remove {unusedAssets.Count} asset(s)?",
+                    ok: "Remove",
+                    cancel: "Cancel");
+                if (choice) {
+                    EditorApplication.ExecuteMenuItem("File/Save Project");
+
+                    var i = 0f;
+                    var total = (float) unusedAssets.Count;
+
+                    foreach (var f in unusedAssets) {
+                        var path = Application.dataPath.Replace("Assets", f);
+                        DeleteWithMeta(path);
+                        
+                        var percent = i * 100 / total;
+                        if (total >= _progressBarShowFromLevel) {
+                            if (Math.Abs(percent % 5f) < 0.01f) {
+                                if (EditorUtility.DisplayCancelableProgressBar(
+                                    "Please wait...",
+                                    "Deleting assets...", percent))
+                                    throw new Exception("Deleting aborted");
+                            }
+
+                            i++;
+                        }
+                    }
+
+                    if (total >= _progressBarShowFromLevel) {
+                        EditorUtility.ClearProgressBar();
+                    }
+
+                    AssetDatabase.Refresh();
+                    SearchUtils.Upd(arg);
+                }
+
+                GUI.enabled = previous;
+                return true;
+            }
+
+            GUI.enabled = previous;
+
+            return false;
+        }
+
+        static void DeleteWithMeta(string path) {
+            FileUtil.DeleteFileOrDirectory(path);
+            var metaPath = AssetDatabase.GetTextMetaFilePathFromAssetPath(path);
+            if (!string.IsNullOrEmpty(metaPath))
+                FileUtil.DeleteFileOrDirectory(metaPath);
+        }
+
+        static bool AskDeleteUnusedScenes(SearchArg arg, List<string> unusedScenes, WindowData windowData) {
+            if (arg == null || unusedScenes == null) return false;
+            var hasUnusedScenes = unusedScenes.Count > 0;
+            var previous = GUI.enabled;
+            GUI.enabled = hasUnusedScenes;
+
+            var guiContentRemoveScenes = windowData.Style.RemoveScene;
+
+            if (GUILayout.Button(guiContentRemoveScenes,
+                windowData.Style.RemoveUnusedBtn)) {
+                var choice = EditorUtility.DisplayDialog(
+                    title: "Asset Cleaner",
+                    message:
+                    $"Do you really want to remove {unusedScenes.Count} scene(s)?",
+                    ok: "Remove",
+                    cancel: "Cancel");
+                if (choice) {
+                    EditorApplication.ExecuteMenuItem("File/Save Project");
+
+                    var i = 0f;
+                    var total = (float) unusedScenes.Count;
+
+                    foreach (var scene in unusedScenes) {
+                        var path = Application.dataPath.Replace("Assets", scene);
+                        DeleteWithMeta(path);
+
+                        if (total >= _progressBarShowFromLevel) {
+                            var percent = i * 100 / total;
+                            if (Math.Abs(percent % 5f) < 0.01f) {
+                                if (EditorUtility.DisplayCancelableProgressBar(
+                                    "Please wait...",
+                                    "Deleting scenes...", percent))
+                                    throw new Exception("Deleting aborted");
+                            }
+
+                            i++;
+                        }
+                    }
+
+                    if (total >= _progressBarShowFromLevel) {
+                        EditorUtility.ClearProgressBar();
+                    }
+
+                    AssetDatabase.Refresh();
+                    SearchUtils.Upd(arg);
+                }
+
+                GUI.enabled = previous;
+
+                return true;
+            }
+
+            GUI.enabled = previous;
+
+            return false;
+        }
+
+
+        void RenderRows(WindowData windowData) {
+            // todo show spinner until scene is loaded, 
+
+            if (FileResultRows.GetEntitiesCount() > 0) {
+                windowData.ExpandFiles =
+                    EditorGUILayout.Foldout(windowData.ExpandFiles,
+                        $"Usages in Project: {FileResultRows.GetEntitiesCount()}");
+            }
+
+            if (SearchArgMain.IsEmpty())
+                return;
+
+            if (windowData.ExpandFiles && windowData.FindFrom == FindModeEnum.File)
+                foreach (var i in FileResultRows.Out(out var get1, out var get2, out _, out _))
+                    DrawRowFile(get1[i], get2[i], windowData);
+
+
+            var sceneMessage = $"Usages in Scenes: {ScenePaths.GetEntitiesCount()}";
+            if (ScenePaths.GetEntitiesCount() > 0) {
+                windowData.ExpandScenes =
+                    EditorGUILayout.Foldout(windowData.ExpandScenes, sceneMessage);
+            }
+
+
+            if (!windowData.ExpandScenes) return;
+
+            if (windowData.ExpandScenes && windowData.FindFrom == FindModeEnum.Scene) {
+                foreach (var (grp, indices) in SceneResultRows.Out(out _, out var get2, out _, out _)
+                    .GroupBy1(ResultComp.Instance)) {
+                    using (new EditorGUILayout.VerticalScope(EditorStyles.helpBox)) {
+                        var count = 0;
+                        foreach (var i in indices) {
+                            if (count++ == 0)
+                                if (GUILayout.Button(get2[i].Label, windowData.Style.RowMainAssetBtn)) {
+                                    if (windowData.Click.IsDoubleClick(grp.RootGo)) {
+                                        // _selectionChangedByArrows = false;
+                                        Selection.activeObject = grp.RootGo;
+                                    }
+                                    else
+                                        EditorGUIUtility.PingObject(grp.RootGo);
+
+                                    windowData.Click = new PrevClick(grp.RootGo);
+                                }
+
+                            DrawRowScene(get2[i]);
+                        }
+                    }
+                }
+            }
+
+            using (new GUILayout.HorizontalScope()) {
+                GUILayout.Space(windowData.Style.SceneIndent1);
+                using (new EditorGUILayout.VerticalScope()) {
+                    foreach (var i1 in ScenePaths.Out(out var get1, out var get2, out _)) {
+                        windowData.SceneFoldout.text = get1[i1].PathNicified;
+                        var details = get2[i1];
+
+                        details.SearchRequested = details.Scene.isLoaded;
+                        details.SearchRequested = EditorGUILayout.Foldout(details.SearchRequested,
+                            windowData.SceneFoldout, EditorStyles.foldout);
+                        if (details.SearchRequested && details.Scene.isLoaded && !details.SearchDone) {
+                            var mainArg = SearchArgMain.GetSingle();
+
+                            mainArg.Scene = SceneManager.GetSceneByPath(details.Scene.path);
+
+                            SearchUtils.InScene(mainArg, details.Scene);
+                            details.SearchDone = true;
+                        }
+
+                        if (!details.SearchRequested) {
+                            if (!details.Scene.isLoaded) continue;
+                            if (!details.WasOpened) {
+                                // to clean up on selection change
+                                AufCtx.World.NewEntityWith(out SceneToClose comp);
+                                comp.Scene = details.Scene;
+                                comp.ForceClose = true;
+                            }
+
+                            foreach (var row in SceneResultRows.Out(out _, out _, out var get3, out var entities)) {
+                                if (!get3[row].ScenePath.Eq(details.Path))
+                                    continue;
+
+                                entities[row].Destroy();
+                            }
+
+                            details.SearchDone = false;
+                        }
+                        else {
+                            if (!details.Scene.isLoaded) {
+                                details.Scene = EditorSceneManager.OpenScene(details.Path, OpenSceneMode.Additive);
+
+                                // to clean up on selection change
+                                AufCtx.World.NewEntityWith(out SceneToClose comp);
+                                comp.Scene = details.Scene;
+                                comp.SelectionId = Globals<PersistentUndoRedoState>.Value.Id;
+
+
+#if UNITY_2019_1_OR_NEWER
+                                EditorSceneManager.SetSceneCullingMask(details.Scene, 0);
+#endif
+                                details.SearchRequested = true;
+                                // todo Scope component
+#if later
+                                     if (details.Scene.isLoaded)
+                                    EditorSceneManager.CloseScene(details.Scene, false);
+#endif
+                            }
+                            else if (SceneResultRows.IsEmpty())
+                                EditorGUILayout.LabelField("No in-scene dependencies found.");
+                            else
+                                using (new GUILayout.HorizontalScope()) {
+                                    GUILayout.Space(windowData.Style.SceneIndent2);
+                                    using (new EditorGUILayout.VerticalScope())
+                                        foreach (var (grp, indices) in SceneResultRows
+                                            .Out(out var g1, out var g2, out var g3, out _)
+                                            .GroupBy1(ResultComp.Instance)) {
+                                            var any = false;
+                                            foreach (var i3 in indices) {
+                                                if (!g3[i3].ScenePath.Eq(details.Path))
+                                                    continue;
+                                                any = true;
+                                                break;
+                                            }
+
+                                            if (!any)
+                                                continue;
+
+                                            using (new EditorGUILayout.VerticalScope(EditorStyles.helpBox)) {
+                                                var count = 0;
+                                                foreach (var i2 in indices) {
+                                                    if (!g3[i2].ScenePath.Eq(details.Path))
+                                                        continue;
+
+                                                    if (count++ == 0) {
+                                                        Result comp = g1[i2];
+                                                        if (GUILayout.Button(g2[i2].Label,
+                                                            windowData.Style.RowMainAssetBtn)) {
+                                                            if (windowData.Click.IsDoubleClick(grp.RootGo)) {
+                                                                // _selectionChangedByArrows = false;
+                                                                Selection.activeObject = comp.RootGo;
+                                                            }
+                                                            else
+                                                                EditorGUIUtility.PingObject(comp.RootGo);
+
+                                                            windowData.Click = new PrevClick(comp.RootGo);
+                                                        }
+                                                    }
+
+                                                    DrawRowScene(g2[i2]);
+                                                }
+                                            }
+                                        }
+                                }
+                        }
+                    }
+                }
+            }
+        }
+
+        class ResultComp : IEqualityComparer<Result> {
+            public static ResultComp Instance { get; } = new ResultComp();
+            public bool Equals(Result x, Result y) => GetHashCode(x) == GetHashCode(y);
+            public int GetHashCode(Result obj) => obj.RootGo.GetInstanceID();
+        }
+
+        static void DrawRowScene(SearchResultGui gui) {
+            EditorGUI.BeginChangeCheck();
+            // if (data.TargetGo || data.TargetComponent)
+            foreach (var prop in gui.Properties) {
+                {
+                    var locked = prop.Property.objectReferenceValue is MonoScript;
+                    var f = GUI.enabled;
+
+                    if (locked) GUI.enabled = false;
+
+                    EditorGUILayout.PropertyField(prop.Property, prop.Content, false);
+
+                    if (locked) GUI.enabled = f;
+                }
+            }
+
+            if (EditorGUI.EndChangeCheck())
+                gui.SerializedObject.ApplyModifiedProperties();
+        }
+
+
+        static void DrawRowFile(Result data, SearchResultGui gui, WindowData windowData) {
+            using (new EditorGUILayout.VerticalScope(EditorStyles.helpBox)) {
+                var buf = GUI.color;
+                var pingGo = data.MainFile == null ? data.RootGo : data.MainFile;
+                if (GUILayout.Button(gui.Label, windowData.Style.RowMainAssetBtn)) {
+                    if (windowData.Click.IsDoubleClick(pingGo)) {
+                        // _selectionChangedByArrows = false;
+                        Selection.activeObject = pingGo;
+                    }
+                    else {
+                        EditorGUIUtility.PingObject(pingGo);
+                    }
+
+                    windowData.Click = new PrevClick(pingGo);
+                }
+
+                GUI.color = buf;
+
+                EditorGUI.BeginChangeCheck();
+                if (data.File) {
+                    foreach (var prop in gui.Properties) {
+                        using (new EditorGUILayout.HorizontalScope()) {
+                            var locked = prop.Property.objectReferenceValue is MonoScript;
+                            var f = GUI.enabled;
+                            if (locked) GUI.enabled = false;
+                            EditorGUILayout.PropertyField(prop.Property, prop.Content, false);
+                            if (locked) GUI.enabled = f;
+                        }
+                    }
+                }
+
+                if (EditorGUI.EndChangeCheck()) {
+                    gui.SerializedObject.ApplyModifiedProperties();
+                    // dependency.SerializedObject.Update();
+                }
+            }
+        }
+    }
+}
--- a/Cleaner/Systems/SysWindowGui.cs.meta
+++ b/Cleaner/Systems/SysWindowGui.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 87ac41283aa347c4aece096c90076c7f
+timeCreated: 1596213420
--- a/Cleaner/Utils.meta
+++ b/Cleaner/Utils.meta
@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 8f9623ba76cbf214994b7b865c65f362
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Cleaner/Utils/Asr.cs
+++ b/Cleaner/Utils/Asr.cs
@ -0,0 +1,34 @@
+using System.Diagnostics;
+using UnityEngine.Assertions;
+
+namespace Asset_Cleaner {
+    static class FLAGS {
+        //  cleanup in release
+        public const string DEBUG = "DEBUG1";
+        public const string M_DISABLE_POOLING = "M_DISABLE_POOLING";
+    }
+
+    static class Asr {
+#line hidden
+        [Conditional(FLAGS.DEBUG)]
+        public static void AreEqual(int a, int b) {
+            Assert.AreEqual(a, b);
+        }
+
+        [Conditional(FLAGS.DEBUG)]
+        public static void IsTrue(bool b, string format = null) {
+            Assert.IsTrue(b, format);
+        }
+
+        [Conditional(FLAGS.DEBUG)]
+        public static void IsFalse(bool b, string format = null) {
+            Assert.IsFalse(b, format);
+        }
+
+        [Conditional(FLAGS.DEBUG)]
+        public static void IsNotNull(object target, string format = null) {
+            Assert.IsNotNull(target, format);
+        }
+#line default
+    }
+}
--- a/Cleaner/Utils/Asr.cs.meta
+++ b/Cleaner/Utils/Asr.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 53c5eeeb89d541a5b26f906f93ffe650
+timeCreated: 1581424097
--- a/Cleaner/Utils/AufCtx.cs
+++ b/Cleaner/Utils/AufCtx.cs
@ -0,0 +1,37 @@
+using Leopotam.Ecs;
+
+namespace Asset_Cleaner {
+    static class AufCtx {
+        public static EcsWorld World;
+
+        public static EcsSystems UpdateGroup;
+        public static EcsSystems OnGuiGroup;
+
+        internal static bool InitStarted { get; private set; }
+        internal static bool Destroyed { get; private set; }
+
+        internal static void TryInitWorld() {
+            if (InitStarted) return;
+            InitStarted = true;
+
+            World = new EcsWorld();
+
+            (OnGuiGroup = new EcsSystems(World)
+                .Add(new SysWindowGui())).Init();
+
+            (UpdateGroup = new EcsSystems(World)
+                    .Add(new SysRepaintWindow())
+                    .Add(new SysUndoRedoSelection())
+                    .Add(new SysProcessSearch())
+                    .Add(new SysSceneCleanup())
+                ).Init();
+        }
+
+        internal static void DestroyWorld() {
+            if (!InitStarted) return;
+            InitStarted = false;
+            Destroyed = true;
+            Asr.IsFalse(__GlobalsCounter.HasAnyValue());
+        }
+    }
+}
--- a/Cleaner/Utils/AufCtx.cs.meta
+++ b/Cleaner/Utils/AufCtx.cs.meta
@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 999cc1329c8dd5743b39fe17eb02a7aa
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Cleaner/Utils/CommonUtils.cs
+++ b/Cleaner/Utils/CommonUtils.cs
@ -0,0 +1,40 @@
+using System;
+using System.IO;
+
+namespace Asset_Cleaner {
+    static class CommonUtils {
+        static string[] _suffix = {"B", "KB", "MB", "GB", "TB"};
+
+        public static string BytesToString(long byteCount) {
+            if (byteCount == 0)
+                return $"0 {_suffix[0]}";
+
+            var bytes = Math.Abs(byteCount);
+            var place = Convert.ToInt32(Math.Floor(Math.Log(bytes, 1024)));
+            double num;
+            if (place == 0 || place == 1) { // display B, KB in MB
+                num = Math.Round(bytes / Math.Pow(1024, 2), 4);
+                return $"{Math.Sign(byteCount) * num:N} {_suffix[2]}";
+            }
+
+            num = Math.Round(bytes / Math.Pow(1024, place), 1);
+            return $"{Math.Sign(byteCount) * num:F0} {_suffix[place]}";
+        }
+
+        // todo
+        public static long Size(string path) {
+            return TryGetSize(path, out var res) ? res : 0L;
+        }
+
+        public static bool TryGetSize(string path, out long result) {
+            if (!File.Exists(path)) {
+                result = default;
+                return false;
+            }
+
+            var fi = new FileInfo(path);
+            result = fi.Length;
+            return true;
+        }
+    }
+}
--- a/Cleaner/Utils/CommonUtils.cs.meta
+++ b/Cleaner/Utils/CommonUtils.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 4a0fa79cb05e495a8dc80a251a33970c
+timeCreated: 1595072385
--- a/Cleaner/Utils/DirtyUtils.cs
+++ b/Cleaner/Utils/DirtyUtils.cs
@ -0,0 +1,46 @@
+using System.Runtime.CompilerServices;
+
+namespace Asset_Cleaner {
+    static class DirtyUtils {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int HashCode<T1>(in T1 v1) {
+            var hash = v1.GetHashCode();
+            hash = (hash * 397);
+            return hash;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int HashCode<T1, T2>(in T1 v1, in T2 v2) {
+            var hash = v1.GetHashCode();
+            hash = (hash * 397) ^ v2.GetHashCode();
+            return hash;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int HashCode<T1, T2, T3>(in T1 v1, in T2 v2, in T3 v3) {
+            var hash = v1.GetHashCode();
+            hash = (hash * 397) ^ v2.GetHashCode();
+            hash = (hash * 397) ^ v3.GetHashCode();
+            return hash;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int HashCode<T1, T2, T3, T4>(in T1 v1, in T2 v2, in T3 v3, in T4 v4) {
+            var hash = v1.GetHashCode();
+            hash = (hash * 397) ^ v2.GetHashCode();
+            hash = (hash * 397) ^ v3.GetHashCode();
+            hash = (hash * 397) ^ v4.GetHashCode();
+            return hash;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static int HashCode<T1, T2, T3, T4, T5>(in T1 v1, in T2 v2, in T3 v3, in T4 v4, in T5 v5) {
+            var hash = v1.GetHashCode();
+            hash = (hash * 397) ^ v2.GetHashCode();
+            hash = (hash * 397) ^ v3.GetHashCode();
+            hash = (hash * 397) ^ v4.GetHashCode();
+            hash = (hash * 397) ^ v5.GetHashCode();
+            return hash;
+        }
+    }
+}
--- a/Cleaner/Utils/DirtyUtils.cs.meta
+++ b/Cleaner/Utils/DirtyUtils.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 3fd8e20db38143e3a3c51ea733bd0bab
+timeCreated: 1577270369
--- a/Cleaner/Utils/EcsUtils.cs
+++ b/Cleaner/Utils/EcsUtils.cs
@ -0,0 +1,55 @@
+using System.Collections.Generic;
+using System.Linq;
+using Leopotam.Ecs;
+
+namespace Asset_Cleaner {
+    static class EcsUtils {
+        public static IEnumerable<(T Group, IEnumerable<int> Indices)> GroupBy1<T, T1, T2>(this EcsFilter<T, T1, T2> f, IEqualityComparer<T> comp)
+            where T : class
+            where T1 : class
+            where T2 : class {
+            foreach (var group in Inner().GroupBy(tuple => tuple.Group, comp))
+                yield return (group.Key, group.Select(g => g.EcsIndex));
+
+            IEnumerable<(T Group, int EcsIndex)> Inner() {
+                var get1 = f.Get1;
+                foreach (var i in f) yield return (get1[i], i);
+            }
+        }
+
+        public static EcsFilter<T> Out<T>(this EcsFilter<T> filter, out T[] get1, out EcsEntity[] entities) where T : class {
+            get1 = filter.Get1;
+            entities = filter.Entities;
+            return filter;
+        }
+
+        public static EcsFilter<T1, T2> Out<T1, T2>(this EcsFilter<T1, T2> filter, out T1[] get1, out T2[] get2, out EcsEntity[] entities)
+            where T1 : class where T2 : class {
+            get1 = filter.Get1;
+            get2 = filter.Get2;
+            entities = filter.Entities;
+            return filter;
+        }
+
+        public static EcsFilter<T1, T2, T3> Out<T1, T2, T3>(this EcsFilter<T1, T2, T3> filter, out T1[] get1, out T2[] get2, out T3[] get3, out EcsEntity[] entities)
+            where T1 : class where T2 : class where T3 : class {
+            get1 = filter.Get1;
+            get2 = filter.Get2;
+            get3 = filter.Get3;
+            entities = filter.Entities;
+            return filter;
+        }
+
+        public static void AllDestroy(this EcsFilter f) {
+            var ecsEntities = f.Entities;
+            foreach (var i in f)
+                ecsEntities[i].Destroy();
+        }
+
+        public static void AllUnset<T>(this EcsFilter f) where T : class {
+            var e = f.Entities;
+            foreach (var i in f)
+                e[i].Unset<T>();
+        }
+    }
+}
--- a/Cleaner/Utils/EcsUtils.cs.meta
+++ b/Cleaner/Utils/EcsUtils.cs.meta
@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 3d81e9bb0744bc4448ddb9bbd93bffd3
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Cleaner/Utils/Ext.cs
+++ b/Cleaner/Utils/Ext.cs
@ -0,0 +1,17 @@
+using System.Runtime.CompilerServices;
+using Leopotam.Ecs;
+
+namespace Asset_Cleaner {
+    static class Ext {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool Eq(this string s1, string s2) => (s1 == s2);
+        // public static bool Eq(this string s1, string s2) => StringComparer.Ordinal.Equals(s1, s2);
+
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static T GetSingle<T>(this EcsFilter<T> f) where T : class {
+            Asr.AreEqual(f.GetEntitiesCount(), 1);
+            return f.Get1[0];
+        }
+    }
+}
--- a/Cleaner/Utils/Ext.cs.meta
+++ b/Cleaner/Utils/Ext.cs.meta
@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 66f6b6922016ea04797deac8d082bc80
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Cleaner/Utils/Globals.cs
+++ b/Cleaner/Utils/Globals.cs
@ -0,0 +1,29 @@
+namespace Asset_Cleaner {
+    static class Globals<T> where T : class {
+        static T _instance;
+
+        public static T Value {
+            get {
+                Asr.IsFalse(_instance == null);
+                return _instance;
+            }
+            set {
+                var was = HasValue();
+                _instance = value;
+
+                // keep counter to check during deinitialization if all Globals are cleared     
+                if (was && !HasValue())
+                    __GlobalsCounter.Counter -= 1;
+                if (!was && HasValue())
+                    __GlobalsCounter.Counter += 1;
+
+                bool HasValue() => _instance != null;
+            }
+        }
+    }
+
+    static class __GlobalsCounter {
+        internal static int Counter;
+        public static bool HasAnyValue() => Counter > 0;
+    }
+}
--- a/Cleaner/Utils/Globals.cs.meta
+++ b/Cleaner/Utils/Globals.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: dd0464bfdb1b4253ba131c7140510c81
+timeCreated: 1596137163
--- a/Cleaner/Utils/Option.cs
+++ b/Cleaner/Utils/Option.cs
@ -0,0 +1,124 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+
+namespace Asset_Cleaner {
+    readonly struct Option<T> : IEquatable<Option<T>>, IComparable<Option<T>> {
+        // ReSharper disable once StaticMemberInGenericType
+        static readonly bool IsValueType;
+
+        public bool HasValue { get; }
+
+        T Value { get; }
+
+        public static implicit operator Option<T>(T arg) {
+            if (!IsValueType) return ReferenceEquals(arg, null) ? new Option<T>() : new Option<T>(arg, true);
+#if M_WARN
+            if (arg.Equals(default(T))) 
+                Warn.Warning($"{arg} has default value");
+#endif
+            return new Option<T>(arg, true);
+        }
+
+        static Option() {
+            IsValueType = typeof(T).IsValueType;
+        }
+
+        public void GetOrFail(out T value) {
+            if (!TryGet(out value))
+                Fail($"Option<{typeof(T).Name}> has no value");
+        }
+
+        public T GetOrFail() {
+            if (!TryGet(out var value))
+                Fail($"Option<{typeof(T).Name}> has no value");
+            return value;
+        }
+
+        [Conditional("DEBUG1")]
+        static void Fail(string format = null) {
+            throw new Exception(format);
+        }
+
+        public bool TryGet(out T value) {
+            if (!HasValue) {
+                value = default(T);
+                return false;
+            }
+
+            value = Value;
+            return true;
+        }
+
+        internal Option(T value, bool hasValue) {
+            Value = value;
+            HasValue = hasValue;
+        }
+
+        public T ValueOr(T alternative) {
+            return HasValue ? Value : alternative;
+        }
+
+        // for debug purposes
+        public override string ToString() {
+            if (!HasValue) return "None";
+
+            return Value == null ? "Some(null)" : $"Some({Value})";
+        }
+
+        #region eq comparers boilerplate
+
+        public bool Equals(Option<T> other) {
+            if (!HasValue && !other.HasValue)
+                return true;
+
+            if (HasValue && other.HasValue)
+                return EqualityComparer<T>.Default.Equals(Value, other.Value);
+
+            return false;
+        }
+
+        public override bool Equals(object obj) {
+            return obj is Option<T> && Equals((Option<T>) obj);
+        }
+
+        public static bool operator ==(Option<T> left, Option<T> right) {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Option<T> left, Option<T> right) {
+            return !left.Equals(right);
+        }
+
+        public override int GetHashCode() {
+            if (!HasValue) return 0;
+
+            return IsValueType || Value != null ? Value.GetHashCode() : 1;
+        }
+
+        public int CompareTo(Option<T> other) {
+            if (HasValue && !other.HasValue) return 1;
+            if (!HasValue && other.HasValue) return -1;
+
+            return Comparer<T>.Default.Compare(Value, other.Value);
+        }
+
+        public static bool operator <(Option<T> left, Option<T> right) {
+            return left.CompareTo(right) < 0;
+        }
+
+        public static bool operator <=(Option<T> left, Option<T> right) {
+            return left.CompareTo(right) <= 0;
+        }
+
+        public static bool operator >(Option<T> left, Option<T> right) {
+            return left.CompareTo(right) > 0;
+        }
+
+        public static bool operator >=(Option<T> left, Option<T> right) {
+            return left.CompareTo(right) >= 0;
+        }
+
+        #endregion
+    }
+}
--- a/Cleaner/Utils/Option.cs.meta
+++ b/Cleaner/Utils/Option.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 098c45ccebe14f5caa28635386021c94
+timeCreated: 1591801098
--- a/Cleaner/Utils/PersistenceUtils.cs
+++ b/Cleaner/Utils/PersistenceUtils.cs
@ -0,0 +1,57 @@
+using System.IO;
+using UnityEngine;
+
+namespace Asset_Cleaner {
+    static class PersistenceUtils {
+        public static void Load(ref Config result) {
+            var serializable = Deserialize();
+            AufSerializableData.OnDeserialize(in serializable, ref result);
+        }
+
+        public static void Save(in Config src) {
+            AufSerializableData.OnSerialize(in src, out var serializable);
+            var json = JsonUtility.ToJson(serializable);
+            File.WriteAllText(Path, json);
+        }
+
+        static AufSerializableData Deserialize() {
+            AufSerializableData serializableData;
+            string json;
+
+            if (!File.Exists(Path)) {
+                // not exists - write new
+                serializableData = AufSerializableData.Default();
+                json = JsonUtility.ToJson(serializableData);
+                File.WriteAllText(Path, json);
+            }
+            else {
+                // exists
+                json = File.ReadAllText(Path);
+
+                if (string.IsNullOrEmpty(json)) {
+                    // but corrupted - overwrite with new
+                    serializableData = AufSerializableData.Default();
+                    json = JsonUtility.ToJson(serializableData);
+                    File.WriteAllText(Path, json);
+                }
+
+                serializableData = JsonUtility.FromJson<AufSerializableData>(json);
+                if (serializableData.Valid())
+                    return serializableData;
+
+                serializableData = AufSerializableData.Default();
+                json = JsonUtility.ToJson(serializableData);
+                File.WriteAllText(Path, json);
+            }
+
+            return serializableData;
+        }
+
+        static string Path => $"{Application.temporaryCachePath}/AssetCleaner_{AufSerializableData.CurrentVersion}.json";
+
+        // [MenuItem("Tools/LogPath")]
+        static void Log() {
+            Debug.Log(Application.temporaryCachePath);
+        }
+    }
+}
--- a/Cleaner/Utils/PersistenceUtils.cs.meta
+++ b/Cleaner/Utils/PersistenceUtils.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 764a6ef52ca2456eb7c276bbcd0929f0
+timeCreated: 1589466213
--- a/Cleaner/Utils/Pool.cs
+++ b/Cleaner/Utils/Pool.cs
@ -0,0 +1,81 @@
+using System;
+using System.Collections.Generic;
+
+namespace Asset_Cleaner {
+    class Pool<T> : IDisposable where T : class {
+        Func<T> _ctor;
+        readonly Stack<T> _stack;
+
+        // todo place asserts on app quit
+        Action<T> _reset;
+        Action<T> _destroy;
+
+        static Action<T> Empty = _ => { };
+
+        public Pool(Func<T> ctor, Action<T> reset, Action<T> destroy = null) {
+            _ctor = ctor;
+#if !M_DISABLE_POOLING
+            _destroy = destroy ?? Empty;
+            _reset = reset;
+            _stack = new Stack<T>();
+#endif
+        }
+
+        public T Get() {
+#if M_DISABLE_POOLING
+            return _ctor.Invoke();
+#else
+            T element;
+            if (_stack.Count == 0) {
+                element = _ctor();
+            }
+            else {
+                element = _stack.Pop();
+            }
+
+            return element;
+#endif
+        }
+
+        public void Release(ref T element) {
+#if !M_DISABLE_POOLING
+            Asr.IsFalse(_stack.Count > 0 && ReferenceEquals(_stack.Peek(), element),
+                "Internal error. Trying to release object that is already released to pool. ");
+
+            _reset.Invoke(element);
+            _stack.Push(element);
+#endif
+
+            element = null;
+        }
+
+
+        public void Dispose() {
+#if !M_DISABLE_POOLING
+            while (_stack.Count > 0) {
+                var t = _stack.Pop();
+                _destroy.Invoke(t);
+            }
+#endif
+        }
+
+        public _Scope GetScoped(out T tmp) {
+            tmp = Get();
+            return new _Scope(this, ref tmp);
+        }
+
+        public struct _Scope : IDisposable {
+            Pool<T> _pool;
+            T _val;
+
+            internal _Scope(Pool<T> pool, ref T val) {
+                _pool = pool;
+                _val = val;
+            }
+
+            public void Dispose() {
+                _pool.Release(ref _val);
+            }
+        }
+    }
+}
--- a/Cleaner/Utils/Pool.cs.meta
+++ b/Cleaner/Utils/Pool.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: b5a618b193c34a5cba77e7cc0df122f1
+timeCreated: 1591254176
--- a/Cleaner/Utils/SearchUtils.cs
+++ b/Cleaner/Utils/SearchUtils.cs
@ -0,0 +1,458 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using Leopotam.Ecs;
+using UnityEditor;
+using UnityEditor.Animations;
+using UnityEditor.SceneManagement;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+using static Asset_Cleaner.AufCtx;
+using Object = UnityEngine.Object;
+
+namespace Asset_Cleaner {
+	static class SearchUtils {
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static bool IsAssignableFromInverse(this Type lhs, Type rhs) {
+			if (lhs == null || rhs == null)
+				return false;
+
+			return rhs.IsAssignableFrom(lhs);
+		}
+
+		static Queue<SerializedProperty> _tmp = new Queue<SerializedProperty>();
+
+		public static void Upd(SearchArg arg) {
+			if (arg.Target is DefaultAsset folder) {
+				var path = AssetDatabase.GetAssetPath(folder);
+				var store = Globals<BacklinkStore>.Value;
+				arg.UnusedAssetsFiltered = store.UnusedFiles.Where(p => p.Key.StartsWith(path)).Select(p => p.Key).ToList();
+				arg.UnusedScenesFiltered = store.UnusedScenes.Where(p => p.Key.StartsWith(path)).Select(p => p.Key).ToList(); 
+			}
+		}
+
+		public static void Init(SearchArg arg, Object target, Scene scene = default) {
+			Asr.IsNotNull(target, "Asset you're trying to search is corrupted");
+
+			arg.Target = target;
+
+			arg.FilePath = AssetDatabase.GetAssetPath(arg.Target);
+			if (!scene.IsValid()) {
+				Upd(arg);
+
+				arg.Main = AssetDatabase.LoadMainAssetAtPath(arg.FilePath);
+				if (AssetDatabase.IsSubAsset(arg.Target)) { }
+				else {
+					switch (target) {
+						case SceneAsset _:
+							// todo support cross-scene references?
+							// nested = all assets
+							break;
+						default:
+							// AssetDatabase.IsMainAssetAtPathLoaded()
+							var subAssets = AssetDatabase.LoadAllAssetsAtPath(arg.FilePath).Where(Predicate).ToArray();
+							arg.SubAssets = subAssets.Length == 0 ? default(Option<Object[]>) : subAssets;
+
+							bool Predicate(Object s) {
+								if (!s)
+									return false;
+								return s.GetInstanceID() != arg.Target.GetInstanceID();
+							}
+
+							break;
+					}
+				}
+			}
+			else {
+				switch (arg.Target) {
+					case GameObject gg:
+						arg.Main = gg;
+						arg.Scene = scene;
+						arg.SubAssets = gg.GetComponents<Component>().OfType<Object>().ToArray();
+						break;
+					case Component component: {
+						// treat like subAsset
+						arg.Main = component.gameObject;
+						arg.Scene  = scene;
+						break;
+					}
+					default:
+						// project asset such as Material
+						arg.Main = arg.Target;
+						arg.Scene = scene;
+						break;
+				}
+			}
+		}
+
+		static bool SearchInChildProperties(SearchArg arg, Object suspect, bool scene, out EcsEntity entity) {
+			if (IsTargetOrNested(arg, suspect)) {
+				entity = default;
+				return false;
+			}
+
+			if (!suspect) {
+				entity = default;
+				return false;
+			}
+
+			var so = new SerializedObject(suspect);
+			_tmp.Clear();
+			var queue = _tmp;
+			var propIterator = so.GetIterator();
+
+			var prefabInstance = false;
+
+			if (scene && !string.IsNullOrEmpty(arg.FilePath) && PrefabUtility.GetPrefabAssetPathOfNearestInstanceRoot(suspect) == arg.FilePath) {
+				prefabInstance = true;
+				while (propIterator.NextVisible(true)) {
+					if (propIterator.propertyType != SerializedPropertyType.ObjectReference)
+						continue;
+					if (!IsTargetOrNested(arg, propIterator.objectReferenceValue))
+						continue;
+
+					queue.Enqueue(propIterator.Copy());
+				}
+			}
+			else {
+				while (propIterator.Next(true)) {
+					if (propIterator.propertyType != SerializedPropertyType.ObjectReference)
+						continue;
+					if (!IsTargetOrNested(arg, propIterator.objectReferenceValue))
+						continue;
+
+					queue.Enqueue(propIterator.Copy());
+				}
+			}
+
+			if (queue.Count == 0 && !prefabInstance) {
+				entity = default;
+				return false;
+			}
+
+			entity = World.NewEntityWith(out Result data);
+
+			var gui = entity.Set<SearchResultGui>();
+			gui.Properties = new List<SearchResultGui.PropertyData>();
+			gui.SerializedObject = so;
+			gui.Label = new GUIContent();
+
+			// init header
+			Texture2D miniTypeThumbnail = null;
+			if (scene) {
+				switch (suspect) {
+					case Component component:
+						data.RootGo = component.gameObject;
+						gui.TransformPath = AnimationUtility.CalculateTransformPath(component.transform, null);
+						gui.Label.image = AssetPreview.GetMiniThumbnail(data.RootGo);
+						gui.Label.text = gui.TransformPath;
+						break;
+					case GameObject go:
+						data.RootGo = go;
+						gui.Label.image = AssetPreview.GetMiniThumbnail(data.RootGo);
+						gui.TransformPath = AnimationUtility.CalculateTransformPath(go.transform, null);
+						gui.Label.text = gui.TransformPath;
+						break;
+					default:
+						throw new NotImplementedException();
+				}
+
+				miniTypeThumbnail = data.RootGo.GetInstanceID() == suspect.GetInstanceID()
+					? null
+					: AssetPreview.GetMiniThumbnail(suspect);
+			}
+			else {
+				data.File = suspect;
+				data.FilePath = AssetDatabase.GetAssetPath(data.File);
+				data.MainFile = AssetDatabase.LoadMainAssetAtPath(data.FilePath);
+
+				// todo
+				var prefabInstanceStatus = PrefabUtility.GetPrefabInstanceStatus(data.MainFile);
+				switch (prefabInstanceStatus) {
+					case PrefabInstanceStatus.Connected:
+					case PrefabInstanceStatus.Disconnected:
+						switch (data.File) {
+							case Component comp:
+								// transformPath = $"{AnimationUtility.CalculateTransformPath(comp.transform, null)}/".Replace("/", "/\n");
+								gui.TransformPath =
+									$"{AnimationUtility.CalculateTransformPath(comp.transform, null)}";
+								break;
+							case GameObject go:
+								// transformPath = $"{AnimationUtility.CalculateTransformPath(go.transform, null)}/".Replace("/", "/\n");
+								gui.TransformPath =
+									$"{AnimationUtility.CalculateTransformPath(go.transform, null)}";
+								break;
+							default:
+								// Assert.Fail("Not a component"); //todo
+								break;
+						}
+
+						break;
+					case PrefabInstanceStatus.NotAPrefab:
+					case PrefabInstanceStatus.MissingAsset:
+						if (!AssetDatabase.IsMainAsset(data.File)) {
+							// {row.Main.name}
+							gui.TransformPath = $"/{data.File.name}";
+						}
+
+						break;
+				}
+
+				gui.Label.text = data.FilePath.Replace(AssetsRootPath, string.Empty);
+				gui.Label.image = AssetDatabase.GetCachedIcon(data.FilePath);
+			}
+
+			gui.Label.tooltip = gui.TransformPath;
+
+
+			// init properties (footer)
+			while (queue.Count > 0) {
+				var prop = queue.Dequeue();
+				var targetObject = prop.serializedObject.targetObject;
+				var item = new SearchResultGui.PropertyData {
+					Property = prop,
+					Content = new GUIContent()
+				};
+				item.Content.image = miniTypeThumbnail;
+				item.Content.text = Nicify(prop, targetObject, gui.TransformPath);
+				item.Content.tooltip = gui.TransformPath;
+				var typeName = targetObject.GetType().Name;
+				if (StringComparer.Ordinal.Equals(typeName, targetObject.name))
+					item.Content.tooltip = $"{gui.TransformPath}.{prop.propertyPath}";
+				else
+					item.Content.tooltip = $"{gui.TransformPath}({typeName}).{prop.propertyPath}";
+				gui.Properties.Add(item: item);
+			}
+
+			return true;
+		}
+
+		public static bool IsFileIgrnoredBySettings(string path) {
+			if (IgnoreTypes.Check(path, out _)) return true;
+			if (IgnoredNonAssets(path)) return true;
+			if (IgnoredPaths(path, out _)) return true;
+
+			return false;
+		}
+
+		public static bool IgnoredPaths(string path, out string str) {
+			var conf = Globals<Config>.Value;
+			foreach (var substr in conf.IgnorePathContains) {
+				Asr.IsNotNull(path);
+				Asr.IsNotNull(substr);
+				if (!path.Contains(substr)) continue;
+				str = substr;
+				return true;
+			}
+
+			str = default;
+			return false;
+		}
+
+		public static bool IgnoredNonAssets(string path) {
+			return !path.Contains("Assets/");
+		}
+
+		#region Project
+
+		public static bool IsUnused(string path) {
+			if (IsFileIgrnoredBySettings(path))
+				return false;
+			return !AnyDependencies(path);
+		}
+
+		static bool AnyDependencies(string path) {
+			var store = Globals<BacklinkStore>.Value;
+			if (store.UnusedFiles.Select(p => p.Key).Contains(path))
+				return false;
+			if (store.UnusedScenes.Select(p => p.Key).Contains(path))
+				return false;
+			return true;
+		}
+
+		public static void FilesThatReference(SearchArg arg) {
+			var store = Globals<BacklinkStore>.Value;
+			var path1 = AssetDatabase.GetAssetPath(arg.Target);
+
+			if (!store.Backward.TryGetValue(path1, out var dep))
+				return;
+
+			foreach (var path in dep.Lookup) {
+				var mainAsset = AssetDatabase.GetMainAssetTypeAtPath(path);
+				if (mainAsset.IsAssignableFromInverse(typeof(SceneAsset)))
+					continue;
+
+				var any = false;
+				if (mainAsset.IsAssignableFromInverse(typeof(GameObject))) { }
+				else {
+					var allAssetsAtPath = AssetDatabase.LoadAllAssetsAtPath(path);
+					foreach (var suspect in allAssetsAtPath) {
+						if (suspect is DefaultAsset || suspect is Transform || !suspect) continue;
+
+						if (!SearchInChildProperties(arg, suspect, false, out var entity))
+							continue;
+
+						entity.Set<FileResultTag>();
+						any = true;
+					}
+				}
+
+				if (any) continue;
+
+				// failed to find any property - just show main asset
+				var e = World.NewEntity();
+				var gui = e.Set<SearchResultGui>();
+				gui.Properties = new List<SearchResultGui.PropertyData>();
+				var main = AssetDatabase.LoadMainAssetAtPath(path);
+				gui.Label = new GUIContent() {
+					image = AssetPreview.GetMiniThumbnail(main),
+					text = path.Replace(AssetsRootPath, string.Empty)
+				};
+				var res = e.Set<Result>();
+				res.MainFile = main;
+				e.Set<FileResultTag>();
+			}
+		}
+
+		public static void ScenesThatContain(Object activeObject) {
+			var store = Globals<BacklinkStore>.Value;
+			var path1 = AssetDatabase.GetAssetPath(activeObject);
+			if (!store.Backward.TryGetValue(path1, out var dep))
+				return;
+
+			foreach (var path in dep.Lookup) {
+				if (!AssetDatabase.GetMainAssetTypeAtPath(path).IsAssignableFromInverse(typeof(SceneAsset)))
+					continue;
+
+				World.NewEntityWith(out SceneResult sp, out SceneDetails sceneDetails);
+				sp.PathNicified = path.Replace("Assets/", string.Empty);
+
+				// heavy
+				sceneDetails.Path = path;
+				var alreadyOpened = false;
+				for (var i = 0; i < EditorSceneManager.loadedSceneCount; i++) {
+					var cur = SceneManager.GetSceneAt(i);
+					if (!cur.path.Eq(sceneDetails.Path)) continue;
+					alreadyOpened = true;
+					sceneDetails.Scene = cur;
+				}
+
+				sceneDetails.WasOpened = alreadyOpened;
+			}
+		}
+
+		#endregion
+
+		#region Scene
+
+		static Pool<List<Component>> ComponentListPool = new Pool<List<Component>>(() => new List<Component>(), list => list.Clear());
+
+		// todo provide explicit scene arg 
+		public static void InScene(SearchArg arg, Scene currentScene) {
+			var rootGameObjects = currentScene.GetRootGameObjects();
+
+			foreach (var suspect in Traverse(rootGameObjects)) {
+				if (!SearchInChildProperties(arg, suspect, scene: true, out var entity))
+					continue;
+				var s = entity.Set<InSceneResult>();
+				s.ScenePath = arg.Scene.path;
+			}
+
+			IEnumerable<Object> Traverse(GameObject[] roots) {
+				foreach (var rootGo in roots)
+				foreach (var comp in GoAndChildComps(rootGo)) {
+					yield return comp;
+				}
+			}
+
+			IEnumerable<Object> GoAndChildComps(GameObject rr) {
+				using (ComponentListPool.GetScoped(out var pooled)) {
+					rr.GetComponents(pooled);
+					foreach (var component in pooled) {
+						if (component is Transform)
+							continue;
+						yield return component;
+					}
+				}
+
+				var transform = rr.transform;
+				var childCount = transform.childCount;
+				for (int i = 0; i < childCount; i++) {
+					var g = transform.GetChild(i).gameObject;
+					foreach (var res in GoAndChildComps(g))
+						yield return res;
+				}
+			}
+		}
+#if backup
+     		static void InScene(SearchArg arg, Scene currentScene) {
+			var allObjects = currentScene
+				.GetRootGameObjects()
+				.SelectMany(g => g.GetComponentsInChildren<Component>(true)
+					.Where(c => c && !(c is Transform))
+					.Union(Enumerable.Repeat(g as Object, 1))
+				)
+				.ToArray();
+
+			var total = allObjects.Length;
+			for (var i = 0; i < total; i++) {
+				var suspect = allObjects[i];
+
+				if (SearchInChildProperties(arg, suspect, true, out var entity)) {
+					var s = entity.Set<InSceneResult>();
+					s.ScenePath = arg.Scene.path;
+				}
+			}
+		}
+#endif
+
+		static bool IsTargetOrNested(SearchArg target, Object suspect) {
+			if (!suspect)
+				return false;
+
+			if (target.Target.GetInstanceID() == suspect.GetInstanceID() || target.Main.GetInstanceID() == (suspect).GetInstanceID())
+				return true;
+
+			if (target.SubAssets.TryGet(out var subassets))
+				foreach (var asset in subassets) {
+					if (asset.GetInstanceID() == (suspect).GetInstanceID())
+						return true;
+				}
+
+			return false;
+		}
+
+		static string Nicify(SerializedProperty sp, Object o, string transformPath) {
+			//            return sp.propertyPath;
+
+			string nice;
+			switch (o) {
+				case AnimatorState animatorState:
+					return animatorState.name;
+				case Material material:
+					nice = material.name;
+					break;
+				default: {
+					nice = sp.propertyPath.Replace(".Array.data", string.Empty);
+					if (nice.IndexOf(".m_PersistentCalls.m_Calls", StringComparison.Ordinal) > 0) {
+						nice = nice.Replace(".m_PersistentCalls.m_Calls", string.Empty)
+							.Replace(".m_Target", string.Empty);
+					}
+
+					nice = nice.Split('.').Select(t => ObjectNames.NicifyVariableName(t).Replace(" ", string.Empty))
+						.Aggregate((a, b) => a + "." + b);
+					break;
+				}
+			}
+
+			// nice = $"{transformPath}({o.GetType().Name}).{nice}";
+			nice = $"({o.GetType().Name}).{nice}";
+			return nice;
+		}
+
+		const string AssetsRootPath = "Assets/";
+
+		#endregion
+	}
+}
--- a/Cleaner/Utils/SearchUtils.cs.meta
+++ b/Cleaner/Utils/SearchUtils.cs.meta
@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 66f3f357bedc44e2907d7e5f48de45d3
+timeCreated: 1576134438
--- a/Cleaner/com.leopotam.ecs.meta
+++ b/Cleaner/com.leopotam.ecs.meta
@ -0,0 +1,8 @@
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+guid: cf3dfe88eca681d449c3f24f79d64b4c
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Show More
+++ b/Show More