Re: "... the window start at a meaningless point within a line."

[Alan Mackenzie <acm@muc.de>]

Hello, Eli.

On Mon, Oct 19, 2015 at 03:33:40PM +0300, Eli Zaretskii wrote:
> > Date: Mon, 19 Oct 2015 12:02:23 +0000
> > Cc: emacs-devel@gnu.org
> > From: Alan Mackenzie <acm@muc.de>

> > > I don't understand why "T" is always at bol.  It can be any column.

> > I'm only really looking at the problem of getting to the correct
> > beginning of line.  Moving to a specific column (with a cons argument to
> > vertical-motion) seems to be less of a problem.

> If that's in a continuation line, you have the same problem: the
> display engine and the move_it_* functions count coordinates and
> columns from their BOL, not from your "actual" BOLs.

That's not what I see.  Having set `it' in Fvertical_motion to an
iterator based at WS, the column movement remains based on `it', i.e.
based on "actual" BOLs.

> > (By the way, have you tried the code at all?)

> No, because I don't know how much I need to just see the problems,
> without the solutions.  At some point I will probably ask you for a
> minimal patch an a recipe to see the problem, unless we will find a
> solution by just talking.

OK.

-- 
Alan Mackenzie (Nuremberg, Germany).