bug#14598: 24.3; global-hl-line-mode + text-scale-adjust + next-line + scrolling

[E Sabof]

On Sat, Jun 15, 2013 at 1:45 PM, Eli Zaretskii <eliz@gnu.org> wrote:

> Date: Sat, 15 Jun 2013 13:10:22 +0100
> From: E Sabof <esabof@gmail.com>
> Cc: psainty@orcon.net.nz, 14598@debbugs.gnu.org

>
> > I have no opinion on that.  In my experience, arguing about defaults
> > is a waste of time.  Please note, however, that Emacs can display
> > images in any mode, so I wouldn't know how to identify the "modes that
> > use images".
> >
>
> One way to do it would be for modes to identify themselves, by setting
> auto-window-vscroll to t.

Then every mode will need to do that.

The idea is that in practice, the functionality isn't needed most of the time, but backfires with text-scale-adjust. The only two modes that I use that mix images and text are org-mode and w3m. I'm not sure if I like the idea myself, but it might deserve a place on the side of the table.

 

> A perhaps better approach might be to make auto-window-vscroll only act on
> lines significantly larger than default height (x4?), and not on any line
> with a non-standard height.

You need to consider the window height as well (or only that), not
just the default font size.  And if we go that way, I'd argue that
vscroll should be used regardless of the value of auto-window-vscroll.

At the moment I'm a bit confused as to how auto-window-vscroll works right now. I might try to dig a bit deeper at some point, and put together a prototype of how I think it should work.