Re: [emacs-bidi] adding LRM in visual-to-logical transform

[Eli Zaretskii]

> From: Alex Schroeder <address@hidden>
> Date: Sat, 17 Nov 2001 16:00:25 +0100
> 
> > Yes, when we will apply "visual" search or for comparing files.
> > I don't think it will implemented any time soon because it means the 
> > whole buffer must be "visualized" for the operation.
> 
> Well, at least in principle Eli's code can visualize a buffer starting
> at any position, because that's what the redisplay engine wants, and
> it only visualizes as much as necessary, so it should be possible to
> implement something isearch-like on top of it.

The current plan calls for ignoring non-displayed characters (such as
formatting codes) as part of the search algorithm in search.c.  Since
you type the search string in logical order and the buffer is in
logical order, there's no need for any bidi conversions for the
search (except, of course, the redisplay operation that displays the
search string in the echo area).

Note that we will most probably need an option to make the search
sensitive to non-displayable characters, because sometimes users
might require that.