Hi Bram,
2020/2/8 Sat 7:03:24 UTC+9 Bram Moolenaar wrote:
>
>
> Ken Takata wrote:
>
> > `:help :!` says:
> >
> > Vim redraws the screen after the command is finished,
> > because it may have printed any text. This requires a
> > hit-enter prompt, so that you can read any messages.
> > To avoid this use: >
> > :silent !{cmd}
> > < The screen is not redrawn then, thus you have to use
> > CTRL-L or ":redraw!" if the command did display
> > something.
> >
> > However, I think this is not accurate.
> >
> > If 't_ti' and 't_te' are set to empty, then `:silent !{cmd}` keeps
> showing
> > the
> > output of the command. User needs to use CTRL-L to show the Vim screen
> > again.
> > (This behavior matches the help.)
> >
> > On the other hand, if 't_ti' and 't_te' are set to default, Vim uses
> > alternate
> > screen, then `:silent !{cmd}` shows a blank screen after the execution
> of
> > the
> > command (even the command didn't display anything). User still needs to
> use
> > CTRL-L to show the Vim screen again.
> > This behavior differs from the help, and I don't think it is useful at
> all.
> > How about restoring the Vim screen automatically when alternate screen
> is
> > enabled? E.g.:
> >
> > --- a/src/ex_cmds.c
> > +++ b/src/ex_cmds.c
> > @@ -1469,6 +1469,8 @@ do_shell(
> > wait_return(term_console ? -1 : msg_silent == 0); // see below
> > # else
> > wait_return(msg_silent == 0);
> > + if (swapping_screen() && msg_silent > 0)
> > + redraw_later_clear();
> > # endif
> > no_wait_return = save_nwr;
> > }
> >
> >
> > The help should be also updated.
>
> The problem appears to be that t_te includes ESC [J, which clears the
> screen. When I remove the ":silent !ls" command is OK.
>
> I wonder why it's in the default t_te entry. Can we just remove it?
>
In my environment, t_te is "^[[?1049l^[[23;0;0t".
"^[[J" is not included.
Regards,
Ken Takata
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