Re: Mixed L2R and R2L paragraphs and horizontal scroll

> From: Richard Stallman <[email protected]>
> Date: Fri, 05 Feb 2010 07:44:46 -0500
> Cc: [email protected], [email protected], [email protected]
> 
>     ??? What are the alternatives?  The only one that was raised is the
>     ``rigid scrolling'', but even there we need to do something sensible
>     for the nil value of ``line length''.
> 
> Rigid scrolling is the right thing to do.  As far as I can see, it is
> simple and well defined in all cases, including the case where the
> window width controls the normal alignment of R2L lines.
> 
> That case (which is the one you have implemented so far, right?)  is a
> matter of how to display the text when there is no hscroll.  However,
> what hscroll should do in that case is totally straightforward: just
> scroll all the text (including the parts that are hidden off the left
> and right edges) rigidly left or right.

You didn't say what to do when the (to be introduced) ``line length''
variable is nil.