On 14 March 2014, <celel...@gmail.com> wrote:
> Le vendredi 14 mars 2014 21:13:09 UTC+1, LCD 47 a écrit :
[...]
> >     Your shell is probably linked against readline.  Readline
> > interfering with curses is not unheard of. :)
> 
> Ok. I just re-did my tests by running:
> xterm -e vim
> xterm -e screen vim
> xterm -tn screen -e vim
> 
> There should be no shell involved, right?

    Right.

> Of course screen uses ncurses, but it's how I want to use vim with
> <S-PageUp> and <S-PageDown>.  But just to eliminate the possibility
> of ncurses interfering, the third command run vim with environment
> TERM=screen. Given that my screen terminfo contains the same entries
> for the caps %e and %c (infos kPRV and kNXT) there should be no
> difference, right?
> I still observe the same behavior: works when TERM=xterm, not when
> TERM=screen.

    Well, comparing your terminfo entry for screen to the corresponding
entry for xterm, there are plenty of differences:

        $ infocmp -d screen xterm | fgrep -vw comparing | wc -l
        100

    I don't know enough about xterm to be able to tell which of these
differences are relevant to your issue and which aren't, but it seems
likely that some of them are, in fact, at fault here. *shrug*

[...]
> >     Because Shift-PageUp and Shift-PageDown are typically bound to
> > scroll-back(1, halfpage) and scroll-forw(1, halfpage).
>
> Yes they are. That's why I was talking about the key KP_Prior and not
> Prior. I use the one on the numpad that actually generate the escape
> sequence for %e and %c termcap.
>
> You may try with `xev' to see the symbol associated with the keys.

    Ah, this is an entirely different world of pain you're bringing unto
yourself here. :) I don't think even the unshifted keypad keys work well
with the default Vim settings...

[...]
> Just to convince you, I tried your inoremap commands without the
> XTerm resources. They generate "S-PageUp" and "S-PageDown" with the
> PageUp key of the numpad. But, as expected, they do nothing with the
> real PageUp keys (when I have one), or they scroll xterm if there is
> something to scroll.
>
> However, when TERM=screen, the "buggy" behavior happen. It takes
> ^[[5;2~ litteraly as <ESC>[5;2~. And Ctrl+K then Shift+KP_Prior
> show: [5;2~.
>
> And I tried this without a shell as stated above.

    I see.  Well, I don't have an explanation for this; it may be a bug
in Vim, or a problem in your configuration.  I don't really care to find
out; maybe somebody else does.  However, this seems to be a good enough
workaround:

        map  <Esc>[5;2~         <S-PageUp>
        map  <Esc>[6;2~         <S-PageDown>
        map! <Esc>[5;2~         <S-PageUp>
        map! <Esc>[6;2~         <S-PageDown>

    It works on my machine, with both TERM=screen and TERM=xterm.

    /lcd

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