internal static void AddGameObjectsToPrefabAndConnect(GameObject[] gameObjects, Object targetPrefab)
{
if (gameObjects == null)
{
throw new ArgumentNullException("gameObjects");
}
if (gameObjects.Length == 0)
{
throw new ArgumentException("gameObjects array is empty");
}
if (targetPrefab == null)
{
throw new ArgumentNullException("targetPrefab");
}
if (!PrefabUtility.IsPartOfPrefabAsset(targetPrefab))
{
throw new ArgumentException("Target Prefab has to be a Prefab Asset");
}
Object targetPrefabInstance = null;
var targetPrefabObject = PrefabUtility.GetPrefabAssetHandle(targetPrefab);
foreach (GameObject go in gameObjects)
{
if (go == null)
{
throw new ArgumentException("GameObject in input 'gameObjects' array is null");
}
if (EditorUtility.IsPersistent(go)) // Prefab asset
{
throw new ArgumentException("Game object is part of a prefab");
}
var parentPrefabInstance = GetParentPrefabInstance(go);
if (parentPrefabInstance == null)
{
throw new ArgumentException("GameObject is not (directly) parented under a target Prefab instance.");
}
if (targetPrefabInstance == null)
{
targetPrefabInstance = parentPrefabInstance;
if (!IsPrefabInstanceObjectOf(go.transform.parent, targetPrefabObject))
{
throw new ArgumentException("GameObject is not parented under a target Prefab instance.");
}
}
else
{
if (parentPrefabInstance != targetPrefabInstance)
{
throw new ArgumentException("GameObjects must be parented under the same Prefab instance.");
}
}
if (PrefabUtility.IsPartOfNonAssetPrefabInstance(go))
{
var correspondingGO = PrefabUtility.GetCorrespondingObjectFromSource(go);
var correspondingGOPrefabObject = PrefabUtility.GetPrefabAssetHandle(correspondingGO);
if (targetPrefabObject == correspondingGOPrefabObject)
{
throw new ArgumentException("GameObject is already part of target prefab");
}
}
}
string prefabGUID = AssetDatabase.AssetPathToGUID(AssetDatabase.GetAssetPath(targetPrefab));
if (!VerifyNestingFromScript(gameObjects, prefabGUID, null))
{
throw new ArgumentException("Cyclic nesting detected");
}
AddGameObjectsToPrefabAndConnect_Internal(gameObjects, targetPrefab);
}