Re: Cursor anomoly: apparent and actual positions differ

Hi Bram!

On Mi, 02 Mai 2012, Bram Moolenaar wrote:

>
> Christian Brabandt wrote:
>
> > On Mo, 30 Apr 2012, John Beckett wrote:
> >
> > > I confirm there is a bug (Vim 7.3.509 on Windows).
> > >
> > > I slightly simplified the example to show the minimum that
> > > demonstrates the problem, as below:
> > >
> > > " ----------- start bug.txt ------------------
> > > " To show anomaly, launch Vim as:
> > > " vim -N -u NONE bug.txt
> > > " and enter:
> > > " :so %
> > > " :13
> > > "
> > > if v:version >= 700
> > > au BufLeave * let b:winview = winsaveview()
> > > au BufEnter * if exists('b:winview') | call winrestview(b:winview) | endif
> > > endif
> > > "
> > > " Now enter:
> > > " :copen
> > > " CTRL-W CTRL-W
> > > " Stop and see where cursor is, then press j
> > > " which shows that cursor was NOT where it appeared to be.
> > > " First pressing Ctrl-L or entering :redraw do not help.
> > > " ----------- end bug.txt --------------------
> > >
> > > There is no problem if use ':new' or ':rightbelow new' instead
> > > of ':copen'. Seems the quickfix window is part of problem.
> > >
> > > I can also see the problem if start Vim normally, then just yank
> > > the two au commands and use :@" to source them, then enter
> > > :copen Ctrl-W w. I have seen the cursor end up in the tildes
> > > after end-of-file.
> > >
> > > Using ':echo b:winview' shows:
> > > {'lnum': 13, 'leftcol': 0, 'col': 0, 'topfill': 0,
> > > 'topline': 11, 'coladd': 0, 'skipcol': 0, 'curswant': 0}
> > >
> > > It looks like topline is wrong.
> >
> > Looks like a redraw issue to me. This fixes it for me:
> > diff --git a/src/eval.c b/src/eval.c
> > --- a/src/eval.c
> > +++ b/src/eval.c
> > @@ -18507,7 +18507,7 @@
> > check_cursor();
> > changed_cline_bef_curs();
> > invalidate_botline();
> > - redraw_later(VALID);
> > + redraw_later(NOT_VALID);
> >
> > if (curwin->w_topline == 0)
> > curwin->w_topline = 1;
>
> Perhaps this should call changed_window_setting() instead of the
> individual items marked as changed?

Yes, this also seems to work.

regards,
Christian

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