Unity_Addons/Assets/Editor Add On/Custom Attributes/Hide in Prefab/Scripts/HideInPrefabAttribute.cs

using UnityEngine;

#if UNITY_EDITOR
using UnityEditor;
#endif

public class HideInPrefabAttribute : PropertyAttribute
{

}

[CustomPropertyDrawer(typeof(HideInPrefabAttribute))]
public class HideInPrefabDrawer : PropertyDrawer
{

    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
    {
        PrefabType type = PrefabUtility.GetPrefabType(property.serializedObject.targetObject);

        if (type != PrefabType.Prefab)
            EditorGUI.PropertyField(position, property, label);
    }

    public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
    {
        PrefabType type = PrefabUtility.GetPrefabType(property.serializedObject.targetObject);
        if (type == PrefabType.Prefab)
            return 0;

        return base.GetPropertyHeight(property, label);
    }
}