On 2019-02-15, James McCoy wrote:
> On Fri, Feb 15, 2019, 11:13 Gary Johnson wrote:
>
> On 2019-02-15, Bram Moolenaar wrote:
> > Gary Johnson wrote:
> > > My guess is that Vim is swallowing the Normal Cursor Keys command.
> > >
> > > I'm cc'ing the vim_dev list because I think that this may be a bug
> > > in Vim and that further discussion belongs there.
> >
> > Well, I would think less is to blame to change the escape sequences and
> > not restore it. Vim figures out what codes the cursor keys are sending,
> > it's not really supposed to check every time an external command was
> > executed, right?
> >
> > You can work around it by adding the Keypad code to t_ks, this will be
> > output after an external command is finished.
>
> If I understand the strace output correctly, less _is_ attempting to
> restore the escape sequences. Don't the "Normal Cursor Keys" and
> "Normal Keypad" sequences restore the effects of the "Application
> Cursor Keys" and "Application Keypad" sequences? If less wasn't
> properly restoring the escape sequences, wouldn't the cursor keys be
> messed up every time less is run, not just when Vim pipes to it?
>
>
> The problem is that less is "restoring" the wrong values. Vim will have already
> changed to Application Cursor/Keypad, so when less sets them to Normal, the
> terminal is now sending different sequences than when vim started.
Thanks for the explanation. I'll try to take a closer look and get
better understanding of just what's going on.
Regards,
Gary
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