custom widget / redraw prompt

custom widget / redraw prompt

[Simon Dassow]

Hi all,
i'm currently on a custom widget, which will dis/enable the RPROMPT on
keypress (^P), so i can copy the commandline without the RPROMPT.
What i currently have in my .zshrc is:

switch-rprompt() {
	if [[ -z $RPROMPT ]]; then
		export RPROMPT=$MYRPROMPT
	else
		export RPROMPT=""
	fi
	zle -R
}
zle -N switch-rprompt
bindkey ^P switch-rprompt

but that doesnt works like it should.
Maybe some of you knows whats wrong there, i've already searched the
manpages, but i must be blind or so.

Regards,
Simon

Re: custom widget / redraw prompt

[Bart Schaefer]

On Mar 24,  1:57pm, Simon Dassow wrote:
}
} i'm currently on a custom widget, which will dis/enable the RPROMPT on
} keypress (^P), so i can copy the commandline without the RPROMPT.

You can't do this in the obvious way.  The prompts (both left and right)
are computed just after the `precmd' function runs, and then subsequent
ZLE refreshes only repaint them; so changes to PROMPT, RPROMPT, et al.,
during widget execution have no effect.

Here are some possible alternatives; the first one both changes and
covers up the RPROMPT, the second one merely moves the command onto a
line by itself and leaves the prompts alone.

    switch-rprompt() {
      if [[ -z "$RPROMPT" ]]; then
        setopt localoptions extendedglob
	export RPROMPT="$MYRPROMPT"
	RBUFFER="${RBUFFER%% #}"
      else
	export RPROMPT=""
	RBUFFER="$RBUFFER${(l:COLUMNS:: :):-}"
      fi
    }

    switch-rprompt() {
      setopt localoptions noksharrays
      if [[ "$BUFFER" == $'\\\n'* ]]; then
	((CURSOR -= 2))
	BUFFER="$BUFFER[3,-1]"
      else
	LBUFFER=$'\\\n'"$LBUFFER"
      fi
    }

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com

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