Re: Scrollbar bug on OS X

[Jan D.]

> > It would be absurd to change Emacs's text model to fit the demands of
> > a GUI toolkit.  However, we could consider computing the "total size"
> > for scrolling to include N fictitious final blank lines, N = window
> > height.
>     AFAIK that's what we do for LessTif and Gtk,
>
> Jan, is that what we do for GTK?
Yes,and for Lesstif/Motif.  There has been bug reports on this 
approach.  The main confusion seems to be that when a small buffer is 
used (like the three initial lines in the *scratch* buffer), the 
scrollbar thumb does not extend to the bottom, since we have added the 
fictitious lines at the bottom.  The assumtion is that if you are 
seeing the whole buffer, the scroll bar thumb should indicate that by 
extending from top to bottom.
        Jan D.