converting code to work with a computer thats written for a monitor

I am looking to add support for my button api to allow the use of the computer screen and not just the monitor. I know I am going to need the term api to do this, and text scale will not work, is there anything else I need to take into consideration when doing this?

please note that I am not asking for someone to do it for me, but if you want to look at the code follow the links below
forum post http://www.computercraft.info/forums2/index.php?/topic/17346-button-api/
pastebin http://pastebin.com/FPC8tYXe

Besides from text scale you don't need to worry about anything.

To make life easier, you can store the API to use in a variable.
Like this:

local surface = term
if use a monitor then
    surface = peripheral.wrap(monitor side)
end
surface.setCursorPos(5, 5)
surface.write(" ")
. . .

You'll need to pull mouse_click events instead of monitor_touch aswell, but that should be it really. Essentially you could just throw in mon = term at the top of your code, and work around the textScale, change the pullEvent, and you should be good to go.