/// <summary> Record an action that can be reversed </summary>
/// <param name="window"> Source window </param>
/// <param name="objects"> What objects need to be saved for undo purposes </param>
/// <param name="message"> Undo message describing the action that can be reversed if performing this undo </param>
public void RecordUndo(NodyWindow window, List <Object> objects, string message)
{
if (m_cachedUndoObjects == null || //check that the cache is not null
m_undoObjectsCount != (objects == null ? 0 : objects.Count) || //check the undo steps
ArrayUtility.Contains(m_cachedUndoObjects, null)) //make sure this step is not null
{
UpdateUndoCacheObject(window, objects); //add this step to the undo cache
}
if (m_cachedUndoObjects != null)
{
Undo.RecordObjects(m_cachedUndoObjects, message); //add this undo to the UnityEditor
}
}
/// <summary> Add and undo step to the undo cache </summary>
/// <param name="window"> Source window </param>
/// <param name="objects"> What objects need to be saved for undo purposes </param>
private void UpdateUndoCacheObject(NodyWindow window, List <Object> objects)
{
m_objects.Clear(); //clear any previous entries in the objects list
if (window != null)
{
m_objects.Add(window); //sanity check and add this window to the cache
}
m_objects.Add(WindowSettings); //add the editor settings to the undo cache
if (objects != null) //check that at lease one object was sent with this undo step
{
foreach (Object obj in objects) //add all the sent objects (that need to be saved) to the objects list
{
if (obj != null)
{
m_objects.Add(obj);
}
}
}
m_cachedUndoObjects = m_objects.ToArray(); //update the undo cache
m_undoObjectsCount = objects == null ? 0 : objects.Count; //update the undo steps count
}
