public AddRemoveGhostBlockUndoInstance(EditorUndoManager parent, GhostBlockInstance obj, bool created) : base(parent, obj.Room)
{
Created = created;
UndoObject = obj;
Valid = () => UndoObject != null && ((Created && UndoObject.Room != null) ||
(!Created && Room.ExistsInLevel)) && !Room.CoordinateInvalid(UndoObject.SectorPosition);
UndoAction = () =>
{
if (Created)
{
EditorActions.DeleteObjectWithoutUpdate(UndoObject);
}
else
{
var backupPos = obj.SectorPosition; // Preserve original position and reassign it after placement
EditorActions.PlaceGhostBlockWithoutUpdate(Room, obj.SectorPosition, UndoObject);
}
};
RedoInstance = () =>
{
var result = new AddRemoveGhostBlockUndoInstance(Parent, UndoObject, !Created);
result.Room = Room; // Relink parent room
return(result);
};
}
