> From: Darren Hoo <darren.hoo@gmail.com>
> Date: Wed, 15 Jan 2014 01:59:32 +0800
>
> if a line wrap or truncation happens how can I get the column number
> relative to the beginning of the line displayed? for example:
>
> -------------------------------------------------------------
> This is a a loooooooooooooooooooooooooooooooooooooooooog line
> start of the continuation <!> line
> -------------------------------------------------------------
>
> If point stays at <!>, some function `current-screen-column' should
> return the relative column number to "start".
I think you want posn-at-point.