public static void SetUserData(this UnityEditor.AssetImporter importer, string param, string[] data, bool reload = false)
{
char endline = '\n'; //';'
string userData = importer.userData;
string[] userDataSplit = userData.Split('\n', ';');
//preparing new data line
if (data == null)
{
data = new string[0];
}
string newDataString = param + ":" + data.ToStringMemberwise(separator: ",");
//param line number (-1 if not found)
int numInSplit = -1;
for (int i = 0; i < userDataSplit.Length; i++)
{
if (userDataSplit[i].StartsWith(param + ":"))
{
numInSplit = i;
}
}
//erasing empty data
if (numInSplit >= 0 && data.Length == 0)
{
ArrayTools.RemoveAt(ref userDataSplit, numInSplit);
}
//replacing line
if (numInSplit >= 0 && data.Length != 0)
{
userDataSplit[numInSplit] = newDataString;
}
//adding new line
if (numInSplit == -1 && data.Length != 0)
{
ArrayTools.Add(ref userDataSplit, newDataString);
}
//to string
string newUserData = "";
for (int i = 0; i < userDataSplit.Length; i++)
{
if (userDataSplit[i].Length == 0)
{
continue;
}
newUserData += userDataSplit[i];
if (i != userDataSplit.Length - 1)
{
newUserData += endline;
}
}
//writing
if (newUserData != userData)
{
importer.userData = newUserData;
UnityEditor.EditorUtility.SetDirty(importer);
UnityEditor.AssetDatabase.WriteImportSettingsIfDirty(importer.assetPath);
if (reload)
{
UnityEditor.AssetDatabase.Refresh();
}
}
}