Xterm title changing prompt problem: HELP!

Xterm title changing prompt problem: HELP!

[Shawn Leas]

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This new thing I found is too kewl, but I need a little help.

It sets the Xterm title by echoing:
<ESC>]; put string here^G and then the rest of the prompt.

However, my right prompt is shifted to the left.  I suspect
This is due to zsh keeping track of the length of the left
part of the prompt, then adjusting where to put the right one.

Should I just not have a right prompt? Or is there a way around
this?

PROMPT='^[];[%l] %n@%m %1v (%h) %t\a[%l] %n@%m %1v (%h) %t '
RPROMPT=' %~'
function precmd {
  setopt no_ksh_arrays local_options
  case "${${$(uptime)##*"load average: "}%%,*}" in
    0.[0-4]*) psvar[1]='%^)' ;;
    0.[5-9]*) psvar[1]=';^]' ;;
    1.*)      psvar[1]=';^|' ;;
    2.*)      psvar[1]=':^|' ;;
    3.*)      psvar[1]=':^(' ;;
    [45].*)   psvar[1]=':^O' ;;
    [67].*)   psvar[1]='|-P' ;;
    *)        psvar[1]='|-(' ;;
  esac
}

-Shawn
<=========== America Held Hostage ===========>
   Day 2185 for the poor and the middle class. 
   Day 2204 for the rich and the dead.
   737 days remaining in the Raw Deal.
<============================================> 

Re: Xterm title changing prompt problem: HELP!

[Geoff Wing]

Shawn Leas <sleas@ixion.honeywell.com> typed:
:This new thing I found is too kewl, but I need a little help.
:However, my right prompt is shifted to the left.  I suspect
:This is due to zsh keeping track of the length of the left
:part of the prompt, then adjusting where to put the right one.
:Should I just not have a right prompt? Or is there a way around
:this?
:PROMPT='^[];[%l] %n@%m %1v (%h) %t\a[%l] %n@%m %1v (%h) %t '
         ^ insert ``%{''             ^ insert ``%}''
thus
PROMPT='%{^[];[%l] %n@%m %1v (%h) %t^G%}[%l] %n@%m %1v (%h) %t '

>From the manual (section PROMPT EXPANSION):
	%{...%}
	    Include a string as a literal escape sequence.  The
	    string within the braces should not change the cur-
	    sor position.  Brace pairs can nest.
-- 
Geoff Wing   <gcw@pobox.com>            Mobile : 0412 162 441
Work URL: http://www.primenet.com.au/   Ego URL: http://pobox.com/~gcw/

Re: Xterm title changing prompt problem: HELP!

[Andrew Gallagher]

Geoff Wing wrote:

> Shawn Leas <sleas@ixion.honeywell.com> typed:
> :This new thing I found is too kewl, but I need a little help.
> :However, my right prompt is shifted to the left.  I suspect
> :This is due to zsh keeping track of the length of the left
> :part of the prompt, then adjusting where to put the right one.
> :Should I just not have a right prompt? Or is there a way around
> :this?
> :PROMPT='^[];[%l] %n@%m %1v (%h) %t\a[%l] %n@%m %1v (%h) %t '
>          ^ insert ``%{''             ^ insert ``%}''
> thus
> PROMPT='%{^[];[%l] %n@%m %1v (%h) %t^G%}[%l] %n@%m %1v (%h) %t '
>
> >From the manual (section PROMPT EXPANSION):
>         %{...%}
>             Include a string as a literal escape sequence.  The
>             string within the braces should not change the cur-
>             sor position.  Brace pairs can nest.
>

Or alternatively, take the escape sequence out of PROMPT and "echo -n" it
from inside the precmd() function ... here is my version:

PROMPT='%? //%n@%B%m%b%//
%l%1v%!> '
RPROMPT='(%T, %w)'
function precmd {
 echo -n "^[]0;//$USER@$HOSTNAME$PWD/ ($UNAME)^G"
 }

The advantage of this is that it doesn't mess up non-xterm terminals so
much (where the escape sequence will not be recognised and thus _will_
shift the cursor). PROMPT will overwrite the "echo -n"ed line whether it
is printed or not (so long as it is less than 80 chars).

--
Andrew Gallagher
http://members.tripod.com/~AndrewGallagher/id.html

Re: Xterm title changing prompt problem: HELP!

[Bruce Stephens]

Andrew Gallagher <andrew.gallagher@earthling.net> writes:

> PROMPT='%? //%n@%B%m%b%//
> %l%1v%!> '
> RPROMPT='(%T, %w)'
> function precmd {
>  echo -n "^[]0;//$USER@$HOSTNAME$PWD/ ($UNAME)^G"
>  }

Or you can use print, of course.  Here's mine:

# Set prompts
PROMPT=$(echo -n '%{\e[39;49m%}%m%#%(1v:+:)%{\e[39;49m%} ')
RPROMPT=$(echo -n ' %{\e[32;40m%}%~%{\e[39;49m%}')

precmd() {
    print -Pn '\e]0;%n@%m:%~\a'
  if jobs % >& /dev/null; then
    psvar=("")
  else
    psvar=()
  fi
}

Re: Xterm title changing prompt problem: HELP!

[Geoff Wing]

Andrew Gallagher <andrew.gallagher@earthling.net> typed:
:Geoff Wing wrote:
:Or alternatively, take the escape sequence out of PROMPT and "echo -n" it
:from inside the precmd() function ... here is my version:
:
:The advantage of this is that it doesn't mess up non-xterm terminals so
:much (where the escape sequence will not be recognised and thus _will_
:shift the cursor). PROMPT will overwrite the "echo -n"ed line whether it
:is printed or not (so long as it is less than 80 chars).

No, PROMPT will only overwrite the echo output if you have PROMPT_CR
option set.  It is set by default, so this only applies to people who
have done ``setopt nopromptcr'' (or ``unsetopt promptcr'') either
interactively or via startup files. 

Regards,
-- 
Geoff Wing   <gcw@pobox.com>            Mobile : 0412 162 441
Work URL: http://www.primenet.com.au/   Ego URL: http://pobox.com/~gcw/

Re: Xterm title changing prompt problem: HELP!

[Andrew Gallagher]

Geoff Wing wrote:

> Andrew Gallagher <andrew.gallagher@earthling.net> typed:
>  PROMPT will overwrite the "echo -n"ed line whether it
> :is printed or not (so long as it is less than 80 chars).
>
> No, PROMPT will only overwrite the echo output if you have PROMPT_CR
> option set.  It is set by default, so this only applies to people who
> have done ``setopt nopromptcr'' (or ``unsetopt promptcr'') either
> interactively or via startup files.
>

Good point, but surely you mean that it _doesn't_ apply to those who have
"setopt nopromptcr" ...?

foo> setopt nopromptcr                                          (15:38, Fri
15)
foo> echo -n "ssssss"                                           (15:39, Fri
15)
ssssssfoo>                                                            (15:39,
Fri 15)
foo> setopt promptcr                                            (15:39, Fri
15)
foo> echo -n "ssssss"                                           (15:39, Fri
15)
foo>                                                            (15:39, Fri
15)


--
Andrew Gallagher
http://members.tripod.com/~AndrewGallagher/id.html

Re: Xterm title changing prompt problem: HELP!

[Geoff Wing]

Andrew Gallagher <andrew.gallagher@earthling.net> typed:
:Geoff Wing wrote:
:> Andrew Gallagher <andrew.gallagher@earthling.net> typed:
:>  PROMPT will overwrite the "echo -n"ed line whether it
:> :is printed or not (so long as it is less than 80 chars).
:> No, PROMPT will only overwrite the echo output if you have PROMPT_CR
:> option set.  It is set by default, so this only applies to people who
:> have done ``setopt nopromptcr'' (or ``unsetopt promptcr'') either
:> interactively or via startup files.
:Good point, but surely you mean that it _doesn't_ apply to those who have
:"setopt nopromptcr" ...?

Ah, sorry, when I said "this only applies ..." I meant along the lines of
"the only people who need take notice of this ..."

Regards,
-- 
Geoff Wing   <gcw@pobox.com>            Mobile : 0412 162 441
Work URL: http://www.primenet.com.au/   Ego URL: http://pobox.com/~gcw/

Re: Xterm title changing prompt problem: HELP!

[Andrew Gallagher]

Geoff Wing wrote:

> Andrew Gallagher <andrew.gallagher@earthling.net> typed:
> :Geoff Wing wrote:
> :> Andrew Gallagher <andrew.gallagher@earthling.net> typed:
> :>  PROMPT will overwrite the "echo -n"ed line whether it
> :> :is printed or not (so long as it is less than 80 chars).
> :> No, PROMPT will only overwrite the echo output if you have PROMPT_CR
> :> option set.  It is set by default, so this only applies to people who
> :> have done ``setopt nopromptcr'' (or ``unsetopt promptcr'') either
> :> interactively or via startup files.
> :Good point, but surely you mean that it _doesn't_ apply to those who have
> :"setopt nopromptcr" ...?
>
> Ah, sorry, when I said "this only applies ..." I meant along the lines of
> "the only people who need take notice of this ..."
>

I see what you mean now.

To get around this if you have done "setopt nopromptcr", you just tack the ^M
character onto the end of the "echo -n"ed string manually... et voila.


--
Andrew Gallagher
http://members.tripod.com/~AndrewGallagher/id.html