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Assets/Scripts/NBC/Asset/Editor/Defs/Styles.cs

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+using System.IO;
+using UnityEditor;
+using UnityEngine;
+
+namespace NBC.Asset.Editor
+{
+    public static class Styles
+    {
+        private static bool _init;
+        private static GUISkin styleSheet;
+        private static GUIStyle _headerBoxStyle;
+
+        public static string EditorGUIPath;
+        public static Texture2D Package;
+        public static Texture2D PackageLow;
+        public static Texture2D Group;
+        public static Texture2D Add;
+
+        public static GUIStyle headerBoxStyle => _headerBoxStyle != null
+            ? _headerBoxStyle
+            : _headerBoxStyle = styleSheet.GetStyle("HeaderBox");
+        
+        public static GUIStyle headerLabelStyle => _headerBoxStyle != null
+            ? _headerBoxStyle
+            : _headerBoxStyle = styleSheet.GetStyle("HeaderLabel");
+
+        
+        public static void Initialize()
+        {
+            string[] folders = { "Assets", "Packages" };
+            var assets = AssetDatabase.FindAssets("t:texture icon_package", folders);
+            if (assets.Length > 0)
+            {
+                var assetPath = AssetDatabase.GUIDToAssetPath(assets[0]);
+                EditorGUIPath = Path.GetDirectoryName(assetPath)?.Replace('\\', '/');
+            }
+
+            
+            styleSheet = LoadRes<GUISkin>("StyleSheet.guiskin");
+            Package = LoadIcon("icon_package.png");
+            PackageLow = LoadIcon("icon_package2.png");
+            Group = LoadIcon("icon_folder.png");
+            Add = LoadIcon("icon_add.png");
+        }
+
+        static Texture2D LoadIcon(string filename)
+        {
+            return LoadRes<Texture2D>(filename);
+        }
+
+        static T LoadRes<T>(string filename) where T : Object
+        {
+            return AssetDatabase.LoadMainAssetAtPath(EditorGUIPath + "/" + filename) as T;
+        }
+    }
+}