I would start with a simple scenario so what I'm asking is easily understood.
I usually have a text editor like
notepad++ or some text-editor as a scratchpad. I jot down things, ideas, scribblings and when it makes sense, just copy and paste like I am doing for this question here.
Sometimes, I copy (Ctrl+c) or cut (Ctrl+x) and forgot to paste (Ctrl+v). I know that the contents are in the clipboard/copy buffer and is there if I come back before the system's screensaver and locker comes into the picture. I have seen when I unlock that the clipboard/copy buffer is empty.
I have been wondering if there was a way to to tell the system that if there is something in clipboard/copy buffer keep it for say 30-60 minutes or if needed just 5 minutes (if you are in insecure environment). Is there a way to do it?
I am using mate-screensaver as the default screensaver.