bug#14200: 24.3; Window fringes / margins get reset on switching buffer

bug#14200: 24.3; Window fringes / margins get reset on switching buffer

[E Sabof]

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If in emacs -Q, I evaluate:

(set-window-margins nil 5 5)
(set-window-fringes nil 16 16)

and switch to a different buffer, the fringes/margins will be reset. They
will still be frame-default if I switch back to the same buffer.

Btw, I think it would make more sense, if the above settings where attached
to a buffer and not a window. At the same time there is a buffer-local
variable called window-size-fixed, which looks like it should be a window
property.

Evgeni

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bug#14200: 24.3; Window fringes / margins get reset on switching buffer

[Eli Zaretskii]

> Date: Sat, 13 Apr 2013 21:51:35 +0100
> From: E Sabof <esabof@gmail.com>
> 
> If in emacs -Q, I evaluate:
> 
> (set-window-margins nil 5 5)
> (set-window-fringes nil 16 16)
> 
> and switch to a different buffer, the fringes/margins will be reset. They
> will still be frame-default if I switch back to the same buffer.

If you want the values you set be preserved for that buffer, you need
to set the buffer-local values of left/right-margin-width and
left/right-fringe-width.  If you want them to be preserved in a window
regardless of the buffer it displays, switch to another buffer by
invoking set-window-buffer with non-nil 3rd argument.

> Btw, I think it would make more sense, if the above settings where attached
> to a buffer and not a window.

They are (or can be), see above.

bug#14200: 24.3; Window fringes / margins get reset on switching buffer

[E Sabof]

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On Sat, Apr 13, 2013 at 10:36 PM, Eli Zaretskii <eliz@gnu.org> wrote:

> > Date: Sat, 13 Apr 2013 21:51:35 +0100
> > From: E Sabof <esabof@gmail.com>
> >
> > If in emacs -Q, I evaluate:
> >
> > (set-window-margins nil 5 5)
> > (set-window-fringes nil 16 16)
> >
> > and switch to a different buffer, the fringes/margins will be reset. They
> > will still be frame-default if I switch back to the same buffer.
>
> If you want the values you set be preserved for that buffer, you need
> to set the buffer-local values of left/right-margin-width and
> left/right-fringe-width.  If you want them to be preserved in a window
> regardless of the buffer it displays, switch to another buffer by
> invoking set-window-buffer with non-nil 3rd argument.
>

Thanks, but changing those variables (or the corresponding fringe ones)
doesn't seem to have any effect. emacs-version: GNU Emacs 24.3.1
(x86_64-unknown-linux-gnu, GTK+ Version 2.24.13) of 2013-03-05 on ubuntu

> Btw, I think it would make more sense, if the above settings where
> attached
> > to a buffer and not a window.
>
> They are (or can be), see above.
>

Evgeni

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bug#14200: 24.3; Window fringes / margins get reset on switching buffer

[Eli Zaretskii]

> Date: Sat, 13 Apr 2013 22:52:24 +0100
> From: E Sabof <esabof@gmail.com>
> Cc: 14200@debbugs.gnu.org
> 
> > If you want the values you set be preserved for that buffer, you need
> > to set the buffer-local values of left/right-margin-width and
> > left/right-fringe-width.  If you want them to be preserved in a window
> > regardless of the buffer it displays, switch to another buffer by
> > invoking set-window-buffer with non-nil 3rd argument.
> 
> Thanks, but changing those variables (or the corresponding fringe ones)
> doesn't seem to have any effect.

From the ELisp manual:

     Setting these variables does not immediately affect the window.
  These variables are checked when a new buffer is displayed in the
  window.  Thus, you can make changes take effect by calling
  `set-window-buffer'.

bug#14200: 24.3; Window fringes / margins get reset on switching buffer

[E Sabof]

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On Sun, Apr 14, 2013 at 6:34 AM, Eli Zaretskii <eliz@gnu.org> wrote:

> > Date: Sat, 13 Apr 2013 22:52:24 +0100
> > From: E Sabof <esabof@gmail.com>
> > Cc: 14200@debbugs.gnu.org
> >
> > > If you want the values you set be preserved for that buffer, you need
> > > to set the buffer-local values of left/right-margin-width and
> > > left/right-fringe-width.  If you want them to be preserved in a window
> > > regardless of the buffer it displays, switch to another buffer by
> > > invoking set-window-buffer with non-nil 3rd argument.
> >
> > Thanks, but changing those variables (or the corresponding fringe ones)
> > doesn't seem to have any effect.
>
> From the ELisp manual:
>
>      Setting these variables does not immediately affect the window.
>   These variables are checked when a new buffer is displayed in the
>   window.  Thus, you can make changes take effect by calling
>   `set-window-buffer'.
>

I see.

Evgeni

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