added more utilty packges

Packages/com.jovian.inspector/Editor/Attributes/ReadOnlyAttribute.cs

@@ -0,0 +1,48 @@
+using UnityEngine;
+
+namespace InspectorToolkit
+{
+    public class ReadOnlyAttribute : ConditionalFieldAttribute
+    {
+        public ReadOnlyAttribute() : base("") { }
+
+        /// <param name="fieldToCheck">String name of field to check value</param>
+        /// <param name="inverse">Inverse check result</param>
+        /// <param name="compareValues">On which values field will be shown in inspector</param>
+        public ReadOnlyAttribute(string fieldToCheck, bool inverse = false, params object[] compareValues)
+            : base(fieldToCheck, inverse, compareValues) { }
+    }
+}
+
+#if UNITY_EDITOR
+namespace InspectorToolkit.Internal
+{
+    using UnityEditor;
+
+    [CustomPropertyDrawer(typeof(ReadOnlyAttribute))]
+    public class ReadOnlyAttributeDrawer : PropertyDrawer
+    {
+        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
+        {
+            return EditorGUI.GetPropertyHeight(property, label, true);
+        }
+
+        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
+        {
+            if (!(attribute is ReadOnlyAttribute conditional)) return;
+
+            bool enabled = false;
+
+            if (!string.IsNullOrEmpty(conditional.FieldToCheck))
+            {
+                var propertyToCheck = ConditionalFieldUtility.FindRelativeProperty(property, conditional.FieldToCheck);
+                enabled = !ConditionalFieldUtility.PropertyIsVisible(propertyToCheck, conditional.Inverse, conditional.CompareValues);
+            }
+
+            GUI.enabled = enabled;
+            EditorGUI.PropertyField(position, property, label, true);
+            GUI.enabled = true;
+        }
+    }
+}
+#endif