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bug#14241: 24.3; widgets and posn-at-point
From: |
Eli Zaretskii |
Subject: |
bug#14241: 24.3; widgets and posn-at-point |
Date: |
Tue, 23 Apr 2013 23:21:30 +0300 |
[Please keep the bug address on the CC line.]
> Date: Tue, 23 Apr 2013 16:53:28 +0200
> From: Nicolas Richard <theonewiththeevillook@yahoo.fr>
>
> Hello,
>
> Thanks for your kind answer, please find some more comments below.
>
> Le 22/04/2013 19:39, Eli Zaretskii a écrit :
> > M-: (widget-create 'checkbox) RET
> > C-x =
> > M-: (forward-char -1) RET
> > C-x =
> >
> > See how point doesn't move?
>
> For some reason it does move in my current working emacs session ; but
> it works as you say in a fresh one. I'm not sure it's worth trying to
> understand why there is a difference.
>
> > Any real-life code that bumps into this needs to work around this
> > peculiarity. E.g., don't try forward-char to a position that is
> > covered by an overlay.
>
> Here is the example I started from :
> (let ((recentf-list (list "foo" "bar"))) ; in a real situation this
> ; gets filled with recently
> ; visited filenames.
> (require 'recentf)
> (recentf-edit-list))
>
> [at this point the cursor should be on the first checkbox] and then hit
> C-n : the cursor doesn't stay in the same column (where the checkbox
> is), but moves to the right of it.
>
> In this particular case, TAB does a better job so it might not be worth
> fixing it, but shouldn't C-n always try and preserve the current column
> whenever possible ?
C-n does try to preserve the current column. But this is a tough
case, when line-move-visual is in effect (which it is by default),
because you move cursor across text most of which is invisible
(covered by overlays).