On 2006-04-12, Bram Moolenaar <[EMAIL PROTECTED]> wrote:
> Gary Johnson wrote:
>
> > > > Does anyone know what codes need to be sent to at
> > > > least xterm to have the cursor shape/color restored on vim exit?
> > >
> > > As far as I know it's impossible, there doesn't appear a way to obtain
> > > the cursor color that is in use when Vim is started.
> >
> > (I'm catching up on some old unread list e-mail.)
> >
> > According to the ctlseqs.ms document that came with xterm-165:
> >
> >
> > Operating System Controls
> > OSC Ps ; Pt ST
> > OSC Ps ; Pt BEL
> > Set Text Parameters. For colors and font, if Pt is a
> > "?", the control sequence elicits a response which con-
> > sists of the control sequence which would set the
> > corresponding value. ....
> > ...
> > Ps = 1 2 -> Change colors starting with text cursor to
> > Pt
> >
> >
> > I executed this command at a Linux shell prompt,
> >
> > echo -e '\033]12;?\007' ; read x
> >
> > and got the following response:
> >
> > ^[]12;rgb:ffff/ffff/ffff^G
> >
> > After setting the cursor to red and repeating the command, I got
> > this:
> >
> > ^[]12;rgb:ffff/0000/0000^G
> >
> > So, xterm does have the mechanism to obtain the cursor color when
> > vim is started. I just don't know how to obtain the terminal's
> > response from within vim and don't have the time to experiment
> > further at the moment. I did discover, though, that you can echo
> > back the color in that same format, so no parsing of the terminal
> > response would be necessary.
>
> Interesting, this must have been added recently.
This is from xterm-165, which appears to be from January 2002.
>
> I wonder what triggers the "rgb:" response. It doesn't state somewhere
> why this happens instead of the "ordinary" color numbers. Perhaps
> because xterm was compiled with more than 16 colors?
I don't know. How do you tell how many colors the xterm binary
supports? The xterm I built for SunOS behaves the same as the Linux
one I tested above and I didn't specify anything about colors when I
configured the build, so I think it has only 16 colors.
If I set "rgb:ff00/7f00/fe00", then query the value, the response is
"rgb:ffff/7f7f/fefe". So something limits the resolution to 256
values per color component. Some limited experimentation shows that
the actual resolution is enough to get more than 16 cursor colors.
So maybe a default build of xterm does support 256 colors.
Gary
--
Gary Johnson | Agilent Technologies
[EMAIL PROTECTED] | Wireless Division
| Spokane, Washington, USA
