using UnityEngine;

#if UNITY_EDITOR
using UnityEditor;
using UnityEditorInternal;
#endif



public class ReorderableListAttribute : PropertyAttribute {}



#if UNITY_EDITOR

[CustomPropertyDrawer( typeof( ReorderableListAttribute ) )]
public class ReorderableListDrawer : PropertyDrawer
{
    private ReorderableList list_;

    public void OnEnable()
    {
    }

    public override void OnGUI( Rect rect, SerializedProperty serializedProperty, GUIContent label )
    {
        SerializedProperty listProperty = serializedProperty.FindPropertyRelative( "list_" );
        ReorderableList list = GetList( listProperty );

        float height = 0f;
        for(var i = 0; i < listProperty.arraySize; i++)
        {
            height = Mathf.Max(height, EditorGUI.GetPropertyHeight(listProperty.GetArrayElementAtIndex(i)));
        }
        list.elementHeight = height;
        list.DoList( rect );
    }

    public override float GetPropertyHeight( SerializedProperty serializedProperty, GUIContent label )
    {
        SerializedProperty listProperty = serializedProperty.FindPropertyRelative( "list_" );
        return GetList( listProperty ).GetHeight();
    }

    private ReorderableList GetList( SerializedProperty serializedProperty )
    {
        if( list_ == null )
        {
            list_ = new ReorderableList( serializedProperty.serializedObject, serializedProperty );
        }

        return list_;
    }
}

#endif