Re: invisible

[martin rudalics <rudalics@gmx.at>]

 > AFAIK in all circumstances where you want line-move-ignore-invisible to
 > be non-nil, you'll also want disable-point-adjustment to be nil.
 > And vice-versa.

I never set them hence I conclude you're right.

 > You're saying that line-move-to-column would like current-column and
 > friends should to treat invisible text as if it were visible?

For `line-move-ignore-invisible' nil at least, yes.

 > In Emacs-21, I changed it so that text that's
 > replaced by an ellipsis is counted as if it were visible: I needed this
 > to be able to re-indent blocks of code while hidden by outline-minor-mode.
 > I didn't change it for non-ellipsis invisible text to reduce the
 > backward compatibility problems.
 >
 > It turns out that it's also a good behavior in the sense that you can
 > get the other two behaviors (ignore all invisible text properties and
 > obey all invisible text properties) in the following way:
 >
 >    (let ((buffer-invisibility-spec nil)) (current-column))
 > and
 >    (let ((buffer-invisibility-spec t)) (current-column))

Neat.  Indeed, writing

   (cond
    ((zerop col)
     (beginning-of-line))
    (line-move-ignore-invisible
     (move-to-column col))
    (t
     (let ((buffer-invisibility-spec nil))
       ;; Don't ignore invisible text when moving to the end of an
       ;; invisible line.
       (move-to-column col))))

seems to work perfectly.