On 2009-09-24, viki wrote:
> On Sep 23, 6:22 pm, Gary Johnson <[email protected]> wrote:
> > On 2009-09-23, viki wrote:
> > > In fact, I want to have the usual screen flipping AND I want to see
> > > the final :!echo printouts. The strange thing happens with :!echo.
> > > They are not seen when in Vimleave. They are printed in the
> > > curses-mode screen, which is weird. In all other places in vim,
> > > :!echo is printed in "shell-screen".
> >
> > > Is it a vim bug ? I'd prefer a vim function that prints to "original
> > > screen".
> >
> > > I tried to add set t_ti= t_te= to the PrintAtExit() function, this did
> > > not help me.
> >
> > It's not a bug.
>
> I refer to the :!echo, the shell command execution.
> In vimscript, :!echo writes to *original* screen (unlike :echo).
> When doing :!echo, vim switches to original screen, does system(),
> switches back to alternate screen. Results of :!echo always appear on
> *original* screen. Always, except for au VimLeave. This "except" is
> what has smell of a bug.
I stand corrected. I was sure that vim behaved as I described,
writing the results of a shell command to the alternate screen
without switching, just as it does to the normal screen when
alternate screen switching is disabled. That would leave the
original screen as it was before vim was executed. Instead, it
switches to the alternate screen just as you describe. Vi on HP-UX
11 and on SunOS 5.8 behave the same way.
> Can you explain why in au VimLeave, when vim still operates in
> alternate screen, :!echo does not write to normal screen as in the
> rest of vim ?
If vim's behavior is a bug, it's not just in the processing of the
VimLeave event but in that of all autocommand events. At least the
ones I tested. Try this:
vim -N -u NONE
:au BufNew * !echo hello
:new
:qa
Nothing is written to the original screen. As I said, this is how I
though shell commands always worked, even from the command line. I
don't know whether this behavior is intentional or not. I couldn't
find anything about it in the help files.
Regards,
Gary
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